СПОСОБ ДУГОВОЙ ТОЧЕЧНОЙ СВАРКИ И СВАРОЧНЫЙ АППАРАТ ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

Изобретение может быть использовано для точечной дуговой сварки стальных листов, содержащих углерод в количестве 0,2 мас.% или больше. Опорная плита содержит контактную часть, контактирующую с нижним стальным листом, и бесконтактную часть, находящуюся в бесконтактном состоянии с ним. Плиту располагают так, чтобы ее контактная часть контактировала с нижним стальным листом в положении дальше, чем 3t от центра эквивалентной окружности сварного валика, сформированного на задней поверхности этого листа, где t – толщина самого тонкого свариваемого листа. При сварке осуществляют поочередное и непрерывное повторение генерирования дуги и создание проводимости короткого замыкания так, чтобы время короткого замыкания, когда сварочное напряжение становится равным 10 В или меньше, составляло не более чем 30% до менее чем 60% от длительности цикла проводимости. Изобретение обеспечивает сварное соединение, имеющее заданные параметры сварного валика и обладающее превосходной прочностью. 3 н. и 8 з.п. ф-лы ...

Способ дуговой сварки штучным покрытым электродом

Изобретение относится к способу дуговой сварки штучным покрытым электродом. Закрепляют электрод в электрододержателе, установленном с возможностью перемещения в направлении к изделию под действием силы тяжести. Сближают электрод с изделием в процессе горения дуги в соответствии со скоростью расплавления электрода и перемещение сварочной ванны на изделии вдоль линии сварки с регулированием поперечного сечения наплавляемого валика по длине. Перед сваркой для заданного диаметра стержня и тока сварки устанавливают изменение длины расплавленной части электрода в зависимости от времени горения дуги, по которой определяют изменение скорости расплавления электрода. В процессе сварки электрод и изделие сближают с изменением скорости в зависимости от скорости расплавления электрода, при этом электрод или изделие перемещают вдоль линии сварки с изменением скорости, которое устанавливают исходя из полученной скорости расплавления электрода и требуемой площади поперечного сечения наплавляемого валика ...

ГУСЕНИЧНЫЙ СВАРОЧНЫЙ РОБОТ И СПОСОБ УПРАВЛЕНИЯ ТАКИМ РОБОТОМ

Изобретение относится к гусеничному сварочному роботу. Робот содержит регулируемый магнитный притягивающий модуль (9), колесно-гусеничные ходовые механизмы (2), раму (1) гусеничного хода и сварочное навесное устройство (11). Сварочное навесное устройство (11) расположено на раме (1) гусеничного хода. Колесно-гусеничные ходовые механизмы (2) расположены на двух противоположных концах рамы (1) гусеничного хода для обеспечения мощности для перемещения на гусеницах рамы (1) гусеничного хода. Регулируемый магнитный притягивающий модуль (9) расположен на раме (1) гусеничного хода между двумя колесно-гусеничными ходовыми механизмами (2). Гусеничный сварочный робот оборудован колесно-гусеничными ходовыми механизмами (2) для перемещения на гусеницах без рельсов или направляющих, имеет большой диапазон свариваемости, может перемещаться по поверхности большеразмерных и среднеразмерных плоских или криволинейных элементов конструкций, подлежащих соединению сваркой, может вертикально перемещаться на ...

СПОСОБ ПРОИЗВОДСТВА СВАРНЫХ КОЛЕЦ

Изобретение относится к способу получения сварного кольца. Осуществляют изгиб ленты в кольцо, длина которой соответствует окружности кольца. Соединяют ее торцы сварным швом. Сварку выполняют с двух боковых кромок кольца снаружи внутрь. На одной стороне свариваемого торца ленты выполняют выступ, а на другой стороне свариваемого торца – ответную выемку, в которой размещают выступ с образованием сдвига, расположенного между боковыми кромками ленты в плоскости ленты. Сварку выполняют с обеих боковых кромок кольца вплоть до места сдвига. Таким образом, обеспечивают качество свариваемого внахлест соединения в середине ленты соответствующим качеству сварного шва на кромках ленты. 2 з.п. ф-лы, 4 ил.

СПОСОБ (ВАРИАНТЫ) И УСТРОЙСТВО ДЛЯ УПРАВЛЕНИЯ ИСТОЧНИКОМ ТОКА, А ТАКЖЕ СВАРОЧНЫЙ ШЛЕМ ДЛЯ ПОЛЬЗОВАТЕЛЯ ИСТОЧНИКА ТОКА

... 1. Способ управления со стороны пользователя соединенным с ручным рабочим прибором (4) источником тока (1), причем посредством элементов управления (3) блока (2) управления и индикации на источнике тока (1) настраивают параметры источника тока (1), а посредством расположенного в источнике тока (1) блока обработки (9) регистрируют движение рабочего прибора (4) в пространстве (6), отличающийся тем, что на источнике тока (1) до, после или между проводимыми рабочим прибором (4) работами активируют функцию управления, после чего регистрируют движение рабочего прибора (4) в пространстве (6) и результирующее из этого движения положение рабочего прибора (4) назначают элементу управления (3) блока (2) и назначенный элемент управления (3) подтверждают, после подтверждения элемента управления (3) настраивают или изменяют, по меньшей мере, один соответствующий элементу управления (3) параметр источника тока (1), после чего снова дезактивируют функцию управления на источнике тока (2).2. Способ по п.1 ...

Соединение листа стали с Zn покрытием, выполненное посредством дуговой сварки

ПЛАКИРУЮЩИЙ МАТЕРИАЛ ДЛЯ ПЛАКИРОВАННОГО НЕРЖАВЕЮЩЕЙ СТАЛЬЮ СТАЛЬНОГО ЛИСТА, ПЛАКИРОВАННЫЙ НЕРЖАВЕЮЩЕЙ СТАЛЬЮ СТАЛЬНОЙ ЛИСТ, ВКЛЮЧАЮЩИЙ ЕГО, И СПОСОБ ЕГО ПРОИЗВОДСТВА

... 1. Плакирующий материал для плакированного нержавеющей сталью стального листа, содержащий 0,03 мас.% или менее углерода, 1,5 мас.% или менее кремния, 2,0 мас.% или менее марганца, 0,04 мас.% или менее фосфора, 0,03 мас.% или менее серы, от 22,0 мас.% до 25,0 мас.% никеля, от 21,0 мас.% до 25,0 мас.% хрома, от 2,0 мас.% до 5,0 мас.% молибдена, от 0,15 мас.% до 0,25 мас.% азота и остальное железо и случайные примеси, у которого критическая температура питтинговой коррозии (CPT) после нормализации, определенная в соответствии с ASTM G48-03 Method Е, составляет 45°C или выше, и потери от коррозии в зоне сварки, определенные посредством коррозионного испытания в соответствии со стандартом NORSOK М-601, составляют 1,0 г/мили менее.2. Плакирующий материал для стального листа, плакированного нержавеющей сталью, по п. 1, который дополнительно содержит от 0,0010 до 0,0055 мас.% бора.3. Плакирующий материал для стального листа, плакированного нержавеющей сталью, по п. 1, в котором осадки, извлеченные ...

VERFAHREN UND VORRICHTUNG ZUR PROGRAMMIERUNG

Verfahren zur Herstellung eines geschweissten Gebildes

Device for blocking-off part of interior of a pipe

Hybrid welding apparatuses, systems and methods for spatially offset components

Improvements in or relating to machine carriage guiding systems

... 1,019,633. Welding by pressure. SIEMENSSHUCKERTWERKE A.G. Dec. 5, 1962 [Dec. 5, 1961], No. 46010/62. Heading B3R. In the combination of a first machine part and a second machine part comprising a machine carriage movable along a path relatively to the first part, there are provided first and second guide surfaces on one part at one side of the path, third and fourth guide surfaces on the one part parallel to the first and second surfaces on the other side of the path and rollers on the other part to roll on the surfaces, each roller and its associated bearing being comprised in a self-contained unit replaceably mounted on the other part. The units are arranged parallel to one another. The carriage 3 of a flash-butt welding machine carrying a clamping stand 4 has a pair of frusto-conical rollers 8 on each side of a frame 2 on the base 1 of the machine, each pair of rollers engaging a rail 5 secured to the side of the frame and provided with bevelled bearing surfaces. In a modification bevelled ...

Arc welding method for Zn plated steel sheet and arc welded joint

Provided are: an arc welding method that suppresses occurrences of blow holes in initial parts and final parts in a Zn plated steel sheet and reduces the occupancy ratio for blow holes in the welded part as a whole; and a welded joint. An arc welding method for a Zn plated steel sheet sets the gap between plates to 0.2 - 1.5 mm and includes a first step for moving a welding means from a welding initiation point at a first welding speed and performing welding by applying a first welding heat input, a second step following the first step for moving the welding means at a second welding speed and performing welding by applying a second welding heat input, and a third step following the second step for stopping the movement of the welding means and performing welding for 0.1 - 2 seconds at that stopped position. The first step includes welding performed on a welding unit under conditions wherein the first welding speed is less than the second welding speed and the first welding input heat exceeds ...

MEMBER DRIVE SYSTEM WITH CONSTANT VELOCITY IN A GIVEN PLANE

A METHOD FOR THE MANUFACTURE OF AN ASSEMBLY BY SUBMERGED ARC WELDING (SAW)

The present invention relates to relates to a pre-coated steel substrate wherein the coating comprising at least one titanate and at least one nanoparticle; a method for the manufacture of an assembly; a method for the manufacture of a coated steel substrate and a coated substrate substrate. It is particularly well suited for construction, shipbuilding and offshore industries.

CONTACT WIRE FOR A ROLLER SEAM WELDING MACHINE AND METHOD FOR WELDING SHEETS TOGETHER

The contact wire for a roller seam welding machine is provided on its front face with grooves which are formed in the longitudinal direction of the wire and which are bounded by sharp longitudinal edges. The contact wire is particularly well suited for welding metal sheets, the surfaces of which are heavily soiled or provided with coatings which are poor electrical conductors or electrically nonconducting. During the welding operation, the longitudinal edges cut open the sheets to be welded or their oxide layer or coating which is a poor electrical conductor or nonconducting, and render possible a direct passage of the welding current to the actual metal sheet. Dirt as well as semiplastic and vaporized coating material are reliably carried away to the front and rear in the longitudinal grooves so that the contact wire cannot "float" during the welding operation. A preferred application for the contact wire is the welding of fuel tanks from sheets which are coated so as to be poor electrical ...

ARC WELDING METHOD FOR ZN PLATED STEEL SHEET AND ARC WELDED JOINT

Provided are: an arc welding method that suppresses occurrences of blow holes in initial parts and final parts in a Zn plated steel sheet and reduces the occupancy ratio for blow holes in the welded part as a whole; and a welded joint. An arc welding method for a Zn plated steel sheet sets the gap between plates to 0.2 - 1.5 mm and includes a first step for moving a welding means from a welding initiation point at a first welding speed and performing welding by applying a first welding heat input, a second step following the first step for moving the welding means at a second welding speed and performing welding by applying a second welding heat input, and a third step following the second step for stopping the movement of the welding means and performing welding for 0.1 - 2 seconds at that stopped position. The first step includes welding performed on a welding unit under conditions wherein the first welding speed is less than the second welding speed and the first welding input heat exceeds ...

METHOD FOR PRODUCING A WELDED RING

For producing a welded ring, a band having a length corresponding to the circumference of the ring is bent to form a ring and its two ends are welded together. The band ends to be welded together have an offset in the circumferential direction of the ring, the offset lying in the plane of the band. The welding is performed form both lateral edges of the ring from the outside up to the offset. This avoids an overlapping weld of a welding quality that is different at the centre of the ring from that at the edges.

METHOD OF WELDING A FIRST TO A SECOND METAL PLATE

... 2093318 9205907 PCTABS00011 A method of welding a first metal plate to a second metal plate including the steps of affixing a back-up bar by use of spaced welding tacks to the flat surface of a first metal plate, forming an abutting edge on the second metal plate a series of alternating lands and slots, the slots extending through the entire thickness of the second metal plate and the length of the slots being substantially greater than the length of the lands, positioning the formed edge of the second metal plate so that the lands thereof engage the flat surface of the first metal plate and a substantially continuous slot is formed between the plates and in which the second metal plate is in engagement with the back-up bar to form a joint, arc welding with a consumable electrode in the substantially continuous slot to form a weld, the weld penetrating portions of the flat surface of the first metal plate, the entire abutting edge of the second metal plate and a portion of the back-up bar ...

WELDING ACCESSORY

METHOD AND APPARATUS FOR JOINING METAL COMPONENTS

A welding process and an apparatus used therein for providing a significant improvement in the detrimental tensile residual stress condition on the root side of welds, especially on the inside wall of piping welds. The method combines an extremely thin weld joint design with a non-circular cylindrical, thin welding electrode (10) having an elongated cross-sectional shape. During welding, the elongated dimension is aligned parallel with the length of the weld joint. This combination enables joining of piping and other residual stress sensitive components with both the initial weld joint preparation and the completed weld (6) having a uniquely thin width and with a high aspect ratio of depth to width. The electrode may also have a tungsten alloy blade (18). The blade is made from sheets of tungsten alloy by cutting or stamping. The preferred shape of the blade is an isosceles triangle. The base of the flat triangular blade is secured in a slot formed in an electrode holder (20). The electrode ...

Elektrische Schweissmaschine namentlich für Bleche und Röhren.

Einrichtung zum Zusammenpressen, Zusammenziehen und dergleichen von Blechen, Profileisen und ähnlichen Bauteilen, die zu verschweissen, verlöten, vernieten und dergleichen sind.

Machine automatique pour le soudage à l'arc

Schlittenführung für den beweglichen Spannbock an einer Widerstandsschweissmaschine

Mobile Metallbearbeitungsvorrichtung zur Bearbeitung der Flansche in geflanschten Verbindungen

Vorrichtung zum Ausrichten der Schweissnaht von Einnahtrundrohren

Verfahren zur Herstellung geschweisster Rohre und Anlage zur Durchführung des Verfahrens

Führungsvorrichtung zu Naht-Schweissmaschine

Procédé de soudure par fusion et appareil pour la mise en oeuvre de ce procédé

Verfahren zum automatischen Lichtbogenschweissen und Maschine zur Durchführung des Verfahrens

Einrichtung für das Verschweissen eines längsgerichteten Schweisspaltes und das Nacharbeiten des Schweisswulstes bei aus Stahlplatten schlitzrohrartig geformten Hohlkörpern, insbesondere konischen Masten

hybrid welding method , apparatus and system for vertically offset components.

Das erfindungsgemässe Hybridschweissverfahren umfasst ein Richten eines Laserstrahls (32) von einem Laser (30) auf eine erste Komponente (62), die zu einer zweiten Komponente (64) vertikal versetzt ist, und Richten eines Schweisslichtbogens (42) von einem Lichtbogenschweissgerät (40) auf eine Schweissverbindungsstelle (54) zwischen der ersten Komponente (62) und der zweiten Komponente (64), um die erste (62) und die zweite Komponente (64) miteinander zu verschweissen.

hybrid welding method , apparatus and system for vertically offset components.

Das erfindungsgemässe Hybridschweissverfahren umfasst ein Richten eines Laserstrahls (32) von einem Laser (30) auf eine erste Komponente (62), die zu einer zweiten Komponente (64) vertikal versetzt ist, und Richten eines Schweisslichtbogens (42) von einem Lichtbogenschweissgerät (40) auf eine Schweissverbindungsstelle (54) zwischen der ersten Komponente (62) und der zweiten Komponente (64), um die erste (62) und die zweite Komponente (64) miteinander zu verschweissen.

The hybrid welding apparatus and method for spatially offset - components.

Hybridschweissverfahren umfassen ein Richten eines Laserstrahls von einem Laser auf eine erste Komponente, die zu einer zweiten Komponente vertikal versetzt ist, und Richten eines Schweisslichtbogens von einem Lichtbogenschweissgerät auf eine Schweissverbindungsstelle zwischen der ersten Komponente und der zweiten Komponente, um die erste und die zweite Komponente miteinander zu verschweissen.

WHISKER FOR A ROLE SEAM WELDER.

Double-wire welding method and system

Aluminum matrix graphene composite material, preparation method thereof, welding joint and aluminum alloy welding method

HEAT-EXCHANGER

GAS-SHIELDED ARC WELDING SYSTEM AND GAS-SHIELDED ARC WELDING METHOD

Boxing joint with excellent fatigue strength, method of manufacturing the boxing joint, and welded structure

Improvements with the machines to be welded

Tool guide system with plasma torch sensor

Method and device for the welding of cylindrical stirrups (cradle irons) and the like to a metal support

La présente invention concerne un procédé pour le soudage d'étriers (10) cylindriques et analogues sur un support métallique, caractérisé en ce que l'on soude intérieurement chaque étrier (10) par le moyen d'au moins une torche de soudage (7) délivrant un cordon de soudure dans l'angle formé entre la face interne dudit étrier (10) et la face externe dudit support. L'invention s'applique notamment à la fabrication d'échafaudages soudés.

Bar welding means for forming beams

METHODS OF WELDING TOGETHER SHEETS TO FORM WALLS,TANKS OF THE LIKE

Process of arc welding

TRAVELLING ARC-WELDING APPARATUS

Process for welding explosive-clad metal sheets

아크 스폿 용접 방법 및 그것을 실행하는 용접 장치

... 아크 스폿 용접의 이면 용접 비드에 있어서, 소정의 용접 비드 직경이나 덧붙임 높이를 얻을 수 있고, TSS와 CTS의 양쪽 강도가 우수한 용접 조인트를 얻을 수 있는 아크 스폿 용접 방법 및 그것을 실행하는 용접 장치를 제공한다. 탄소를 0.2질량％ 이상 함유하는 판 두께 t의 강판(1)과, 탄소를 0.2질량％ 이상 함유하고, 판 두께가 t 이상의 적어도 1매의 강판(1)을 겹쳐 배치하고, 비접촉부와 하측 강판의 이면과 상기 비접촉부를 비접촉 상태로 유지하는 접촉부를 구비하는 받침쇠(4)를, 상기 접촉부가 이면 용접 비드의 원상당 중심으로부터 3t를 초과하는 위치에서 하측 강판(1)의 이면과 접촉하도록 받침쇠(4)를 배치하고, 아크 발생과, 용접 와이어 및 상측 강판 사이의 용접 전압이 10V 이하가 되는 단락 통전을, 상기 단락 통전의 기간이 1주기당 30％ 초과 60％ 미만이 되도록, 교대로 반복하여 행하고, 상기 강판(1, 1)을 용접한다.

WELDING CRATER FILL MECHANISM

FILLET WELDING METHOD AND FILLET WELDED JOINT

A welding method for obtaining a lap fillet welded joint excellent in tensile strength, without causing an increase in welding deformation, not fracturing at the weld metal when a tensile load is applied, that is, a method of overlaying at least scheduled welding locations of a first steel sheet with a tensile strength of 780 MPa or more and a second steel sheet and fillet welding an end part of the first steel sheet and a surface of the second steel sheet, characterized by providing a reinforcing part at a surface of the first steel sheet at the opposite side to the surface to be overlaid with the second steel sheet and fillet welding one end part of the reinforcing material and the surface of the first steel sheet and by fillet welding the end part of the reinforcing part, the end part of the first steel sheet, and the surface of the second steel sheet so as to be covered by the weld metal.

METHOD FOR WELDING AUSTENITIC STAINLESS STEEL SHEETS

A method for welding austenitic stainless steel sheets, in which welding defects do not easily occur. Austenitic stainless steel sheets each with a sheet thickness of 0.6 to 1.0 mm, which each contain, in terms of mass %, 0.08% or less of C, 1.5 to 4.0% of Si, 2.0% or less of Mn, 0.04% or less of P, 0.01% or less of S, 16.0 to 22.0% of Cr, 10.0 to 14.0% of Ni, and 0.08% or less of N, and contain at least one of Nb and Ti in an amount of 1.0% or less in total, with the rest including Fe and inevitable impurities, are overlapped and the overlapped portion is welded by arc welding. In addition, the back side of a deposited portion is cooled from 1200° C. to 900° C. at a cooling rate of 110° C./sec or higher. 1. A method for welding austenitic stainless steel sheets , the method comprising the steps of:providing austenitic stainless steel sheets each with a sheet thickness of 0.6 mm to 1.0 mm, which each contain C: 0.08 mass % or less, Si: 1.5 mass % to 4.0 mass %, Mn: 2.0 mass % or less, P: 0.04 mass % or less, S: 0.01 mass % or less, Cr: 16.0 mass % to 22.0 mass %, Ni: 10.0 mass % to 14.0 mass %, and N: 0.08 mass % or less, and contain at least one of Nb and Ti in an amount of 1.0 mass % or less in total, with the rest including Fe and inevitable impurities,overlapping at least two of the austenitic stainless steel sheets,welding the overlapping portion by arc welding, andcooling a back side of a deposited portion, which is a site with the highest temperature at the time of welding on the back side of the welded surface, from 1200° C. to 900° C. at a cooling rate of 110° C./sec or higher.2. The method for welding austenitic stainless steel sheets according to claim 1 , whereinthe austenitic stainless steel sheet contains at least one of Al, Zr and V in an amount of 1.0 mass % or less in total.3. The method for welding austenitic stainless steel sheets according to claim 1 , whereinthe austenitic stainless steel sheet contains at least one of Mo and Cu in an amount of ...

Method for Producing a Welded Connection and Method for Repairing a Welded Connection

A method produces a welded connection between first and second components each having inner and outer sides interconnected by an end face. The first component has a ferritic basic body carrying a plating at the inside and having an end face with a buffer layer of Ni-based alloy. The second component is of austenitic material. The end faces of the components enclose a weld groove. An austenitic root, connecting the plating to the end face of the second component, is welded in the weld groove. An intermediate layer of a nickel alloy having at least 90% nickel is welded onto the root. The intermediate layer is connected to the end faces of the plating and the second component. A weld seam is then produced in the remaining weld groove using a nickel-based welding additive. A method for repairing a welded connection between first and second components is also provided.

COPYING WELDING EQUIPMENT

PRODUCTION OF METALLIC PIPE

PURPOSE: To make crystal grains finer in size and better in quality and to increase the strength of a joint part in electric welding of a metallic tape to form a pipe by applying an ultrasonic oscillation to the electric weld pool part via a shape retaining roll pair thereby stirring the molten metal. CONSTITUTION: An ultrasonic oscillation 12 is applied via a shape retaining roll pair 7 to the weld pool part 11 in electric welding of a metallic tape for forming a pipe. Crystal grains are fined by fine oscillation and stirring of the molten metal, by which defects such as blowholes are prevented and the quality is improved. The joint strength in the boundary part with the non-weld zone is increased and the generation of a crack, etc. is prevented. COPYRIGHT: (C)1985,JPO&Japio ...

CONTROLLING METHOD OF AUTOMATIC WELDING APPARATUS

PURPOSE: To perform continuously excellent welding even at a part containing a point of inflection, by performing automatic welding by alternately switching an automatic controlling mode which is executed based on detected sensing information and a command controlling mode which is executed according to a command from a controlling device. CONSTITUTION: In the control of an automatic welding apparatus which performs welding while the relative position of a torch 1 and work 2 is automatically controlled, the welding of a linear section X to a point A is performed under an automatic controlling mode which executes the position control beased on sensing information detected by a detector. At a point of inflection A at a corner section, the controlling mode is switched to a command controlling mode which executes the position control in accordance with a command signal from a controlling device, and the section θ between points A and B is welded by turning the torch 1 with an arc generated ...

КАРЕТКА СВАРОЧНОГО АППАРАТА

Изобретение может быть использовано для автоматической сварки, в частности, угловых швов в вертикальном положении. Каретка (1) сварочного аппарата перемещается с установленной на ней сварочной горелкой (Т). Опора (6) горелки расположена между передним и задним концами корпуса (3) каретки и поддерживает наконечник (Та) сварочной горелки (Т), направленный диагонально вниз в позиции сбоку от боковой поверхности корпуса (3) каретки. Опора (6) горелки содержит узел (20) качания горелки и узел (40) поперечных колебаний. Механизм (30) качания горелки узла (20) обеспечивает качание наконечника (Та) сварочной горелки (Т) возвратно-поступательно относительно корпуса (3) каретки для перемещения наконечника (Та) вблизи линии сварки (L). Механизм (50) поперечных колебаний узла (40) обеспечивает совместный поворот кожуха (22) и монтажной планки (24) горелки узла (20) качания горелки вокруг винта (21). Изобретение позволяет сваривать угловые швы во внутренних углах в вертикальном положении, не оставляя ...

СПОСОБ (ВАРИАНТЫ) И УСТРОЙСТВО ДЛЯ УПРАВЛЕНИЯ ИСТОЧНИКОМ ТОКА, А ТАКЖЕ СВАРОЧНЫЙ ШЛЕМ ДЛЯ ПОЛЬЗОВАТЕЛЯ ИСТОЧНИКОМ ТОКА

Изобретение относится к способу и устройству для управления источником тока (1), соединенным с ручным рабочим прибором (4) в виде сварочной горелки. Посредством элементов управления (3) блока (2) управления и индикации на источнике тока (1) настраиваются параметры источника тока (1). Посредством расположенного в источнике тока (1) блока обработки (9) регистрируется движение рабочего прибора (4) в пространстве (6). Для обеспечения быстрого управления источником тока даже без снятия пользователем возможной защитной одежды предусмотрено, что на источнике тока (1) активируется функция управления, после чего регистрируется движение рабочего прибора (4) в пространстве (6) и результирующее из этого движения положение рабочего прибора (4) назначается блоку (2). 4 н. и 12 з.п. ф-лы, 9 ил.

СПОСОБ СОЧЕТАНИЯ СВАРКИ И АДГЕЗИОННОГО СВЯЗЫВАНИЯ ДЛЯ СОЕДИНЕНИЯ МЕТАЛЛИЧЕСКИХ КОМПОНЕНТОВ

Изобретение относится к способу соединения металлических компонентов (2, 8) и может найти использование в самолетостроении, автомобилестроении и других отраслях машиностроения. Осуществляют нанесение материала адгезива (16) между компонентами (2, 8) и соединение компонентов посредством сварки в твердом состоянии или сварки плавлением. Сварные швы (18) находятся на расстоянии от материала адгезива (16) и выполнены так, чтобы предотвратить доступ материала адгезива (16) к сварному шву (18). Материал адгезива обеспечивает изолирование границы раздела между компонентами для предотвращения внедрения влаги или других корродирующих материалов и/или компенсацию ухудшения механических свойств зоны, подвергшейся воздействию тепла. 2 н. и 18 з.п. ф-лы, 10 ил.

ЭЛЕМЕНТ ТЕПЛООБМЕННИКА И СПОСОБ ИЗГОТОВЛЕНИЯ ЭЛЕМЕНТА ТЕПЛООБМЕННИКА

Изобретение относится к элементу теплообменника для присоединения к трубам теплообменника и способу его изготовления. Элемент теплообменника состоит из множества сваренных вместе компонентов (2-8, 10, 11, 13, 14). Два компонента (13, 14) образуют угловое соединение (15). На одном компоненте (13) в качестве опоры для второго компонента (14) сформирован заглубленный заплечик (23) с образованием L-образного сварного соединения (29). Рядом с заплечиком (23) в первом компоненте и во втором компоненте выполнена разделка кромок в виде заглубленного желобка (26) для подварочного корневого сварного шва (25). Компоненты (13, 14) соединены подварочным корневым сварным швом (25), который расположен в желобке (26) и образован посредством расплавления нижнего плеча (31) L-образного сварного соединения (29). С противоположной стороны в верхнем плече (30) L-образного сварного соединения (29) образован I-образный сварной шов (12), полученный электронно-лучевой сваркой, направленный к подварочному корневому ...

МНОГОЭЛЕКТРОДНАЯ ЭЛЕКТРОДУГОВАЯ СВАРКА ПОД ФЛЮСОМ

Изобретение может быть использовано для многоэлектродной электродуговой сварки под флюсом встык стальных листов толщиной 15-45 мм. Последовательно располагают множество сварочных электродов в линию в направлении сварки. Заданным образом устанавливают расстояние между электродами, плотность тока и углы наклона электродов. Первый электрод располагают перпендикулярно по отношению к стальному листу или с наклоном при размещении его конца за наконечником электрода в направлении сварки. К первому электроду подают постоянный ток, а к каждому из последующих - переменный ток. Способ обеспечивает стабильную электрическую дугу соответствующих электродов с получением валиков сварного шва с хорошей формой за счет подавления вредного магнитного воздействия, а также позволяет увеличить скорость сварки и предотвращает появление сварочных дефектов. 4 з.п. ф-лы, 2 ил., 5 табл.

МЕТАЛЛ СВАРНОГО ШВА, ОБЛАДАЮЩИЙ ВЫСОКОЙ УСТОЙЧИВОСТЬЮ К ВОДОРОДНОМУ ОХРУПЧИВАНИЮ

... 1. Металл сварного шва, обладающий высокой устойчивостью к водородному охрупчиванию, полученный дуговой сваркой в защитном газе с применением электродной проволоки с флюсовым сердечником, содержащий, мас.%:C: от 0,02 до 0,12%, Si: от 0,1 до 0,80%, Mn: от 0,9 до 2,5%, Ni: от 0,20 до 3,5%, Mo: от 0,05 до 1,50%, Ti: от 0,040 до 0,15%, V: от 0,05 до 0,60%, N: 0,015% или менее (не включая 0%) и O: 0,030% или более, соответственно, остальное - железо и сопутствующие примеси, в которомчастицы Ti-содержащего оксида, содержащие Ti при 20% или более и имеющие эквивалентный диаметр окружности от 0,15 до 1,0 мкм, присутствуют в количестве 5000/ммили более, иколичество V в расчете на общую массу металла сварного шва, присутствующего в виде соединения в металле сварного шва, составляет 0,002% или более, при этомсредний эквивалентный диаметр окружности V-содержащего карбида, присутствующего в металле сварного шва, составляет 15 нм или менее.2. Металл сварного шва по п. 1, дополнительно содержащий по меньшей ...

Способ оперативного ремонта сваркой тонкостенных деталей авиационной техники

КОНСТРУКЦИИ СО СВАРНЫМ ШВОМ ИЗ СПЛАВА 36% Ni-Fe И СПОСОБЫ ИХ ИЗГОТОВЛЕНИЯ И ИСПОЛЬЗОВАНИЯ

... 1. Способ сварки конструкции, включающий в себя: ! формирование конструкции с желаемой толщиной стенки, длиной и областью шва, причем эту конструкцию изготавливают из основного материала - сплава 36% Ni-Fe; ! сварку конструкции вдоль области шва с присадочным материалом - сплавом 36% Ni-Fe так, что оставляют избыточное усиление сварного соединения как часть наплавленного валика в области шва; ! холодную обработку наплавленного валика давлением так, что уменьшают толщину в области шва; и ! термообработку области шва при условиях, эффективных для того, чтобы сделать область шва, имеющей предел прочности на растяжение, предел текучести или их оба, примерно равные или большие, чем у основного материала. ! 2. Способ по п.1, в котором область шва и основной материал имеют предел прочности на растяжение, равный или больший 58 ksi. ! 3. Способ по п.1, в котором область шва и основной материал имеют предел текучести, равный или больший 30 ksi. ! 4. Способ по п.1, в котором коэффициент теплового ...

Verfahren zum Herstellen eine geschweißten Rings

Zum Herstellen eines geschweißten Rings wird ein Band mit dem Ringdurchmesser entsprechender Länge zu einem Ring gebogen und an seinen Enden verschweißt. Wird. Die miteinander zu verschweißenden Bandenden weisen einen in der Bandebene liegenden Versatz in Radialrichtung des Rings auf. Die Schweißung erfolgt von beiden Ringseitenkanten her von außen nach innen bis zu dem Versatz. Dadurch wird in der Bandmitte eine überlappende Schweißung mit gegenüber den Kanten unterschiedlicher Schweißgüte vermieden.

Verfahren und Maschine zum automatischen Schweissen von Schlitzrohren

Device for blocking-off part of interior of a pipe

Improvements in or relating to a Method of Joining Metal-Sheets by Automatic Welding and Apparatus for Carrying Out Said Method

... 1,188,681. Welding by fusion. TECHNIGAZ. 3 April, 1967 [6 April, 1966], No. 15056/67. Heading B3R. In welding apparatus for seam welding a lap joint between sheets, the welding torch is guided by means engaging the surface of one sheet to maintain the torch at a constant distance from such surface and by means engaging the edge of that sheet to align the torch with the edge. Metal sheets are lapwelded by first tack-welding and then continuously seam-welding without the use of filler metal. Sheets of thickness 0À012-0À158 in. may be so welded using a torch of the plasma arc or inert gas shielded non-consumable electrode type. The continuous welding of the tack-welded sheets 26, 27, Fig. 2, is effected by a torch mounted on a carriage 3 slidable on rods 8, 9 of a frame having four feet 21, 22, the front pair of which abut against the edge 43 of the upper sheet 26. A pinion 25 driven by a motor 4 on the carriage 3 engages a rack 16 on the frame to traverse the welding torch. At the end of ...

Method and apparatus for the longitudinal seam welding of metallic strips

... 1,114,350. Welding by fusion. VEREINIGTE METALLWERKE RANSHOFEN-BERNDORF A.G. 29 Dec., 1966 [5 Jan., 1966], No. 58172/66. Heading B3R. In longitudinally seam welding strips 9, 10, the strips as they are fed towards a welding head 7 are held in alignment by clamps 13 movable with the strips. As the first clamp 13 approaches the welding head it is released and moved back towards the second clamp 13 and reclamped, and then the second clamp 13 is similarly retracted and so on. Each clamp 13, comprising clamping members 17 on arms 14, 15 connected by a pivot 16, is first lightly clamped on the strips 9, 10 by a pneumatic piston and cylinder device 20. A second pneumatic device 18 then presses the aligned strips 9, 10 against an adjustable stop 19 and the first device 20 then applies full clamping pressure. The strips, which may be continuous bands passing over a roller 11 and a tensioning roller 12, at the welding station pass over a grooved backing roll 4 mounted on a transversely movable frame ...

A method of forming a joint between two sheet metal panels

... 1,117,158. Brazing; copy milling; making car bodies. BUDD CO. 29 Sept., 1966 [29 Sept., 1965], No. 43649/66. Headings B3A, B3K and B3R. Panels 10, 11, Fig. 5, e.g. forming part of a car body, are joined by locating the edges of the panels in parallel spaced relationship, arc brazing the joint by depositing metal from a consumable electrode to form a bead 24 projecting from both faces of the joint and removing the projecting portion on one face of the joint. The panels 10, 11 are clamped between water cooled chill bars 21, 22 and a water cooled backing bar 23. An argon shielded welding torch and a consumable silicon bronze electrode are used for welding steel panels. Either projecting portion of the bead is removed by milling followed by buffing. Milling.-Use may be made of an edge milling cutter 27, Fig. 6, guided by a follower 29 engaging a guide member 28 to follow the contour of the panels 10, 11. Alternatively the bead may be removed by an end miller 33, Fig. 8, driven by a motor 34 ...

GAS SHIELDED METAL ARC WELDING TORCH

GAS SHIELDED METAL ARC WELDING TORCH

PROCEDURE AND DEVICE FOR THE ROLL SEAM WELDING OF CONTAINERS

DUENNBLECHSCHWEISSVERFAHREN AND DEVICE FOR ITS EXECUTION

VORRICHTUNG ZUM ELEKTROMAGNETISCHEN AUFSPANNEN UND ZUM VERBINDEN, INSBESONDERE VERSCHWEISSEN, DER ENDBEREICHE VON BLECHEN

PROCEDURE FOR THE PRODUCTION OF A WELDED PART WITH VERY GOOD ONE MECHANICAL CHARACTERISTICS FROM A COATED PROTECTIVE PLASTIC FILM

PROCEDURE FOR THE PRODUCTION OF A WELDED JOINT AS WELL AS PROCEDURE FOR THE REPAIR OF A WELDED JOINT

DEVICE FOR ELECTROMAGNETIC STRETCHING AND FOR CONNECTING, IN PARTICULAR WELDING, THE FINAL RANGES SHEET METALS

Mechanism for sanding, milling off and reapplying of a welding seam

STICK ELECTRODE

A stick electrode for depositing an high strength weld metal bead on a workpiece where the yield strength of the weld metal is between 85 ksi and 125 ksi irrespective of the cooling rate. The electrode deposits weld metal having 0.80 - 1.85% by weight manganese, 0.25 - 0.50% by weight molybdenum, 1.25 - 2.50% by weight nickel, and less than 0.07% by weight carbon, wherein the ratios of the carbon, manganese and molybdenum are adjusted to provide a carbon equivalent in deposited weld metal in the range of 0.17 to 0.30 and preferably less than 0.22.

TRAVELING WELDING APPARATUS

METHOD AND APPARATUS FOR MANUFACTURING SMALL DIAMETER, THICK WALLED, CABLE SHEATHS

There is disclosed a method and apparatus for manufacturing a small diameter, thick walled, cable sheath by controllably driving a metal strip in a longitudinal direction while it is trimmed and formed into a hollow tubular member; continuously welding the longitudinal abutting edges of the hollow tubular member in association with cooling the tubular member in the vicinity of the welding by surrounding at least 60% of its circumference with a coolant, while maintaining the resulting longitudinal welded seam free of the coolant; and continuously drawing the cooled hollow tubular member in the same direction as the metal strip is driven.

ARC WELDING METHOD FOR ZN PLATED STEEL SHEET AND ARC WELDED JOINT

Provided are: an arc welding method that suppresses occurrences of blow holes in initial parts and final parts in a Zn plated steel sheet and reduces the occupancy ratio for blow holes in the welded part as a whole; and a welded joint. An arc welding method for a Zn plated steel sheet sets the gap between plates to 0.2 - 1.5 mm and includes a first step for moving a welding means from a welding initiation point at a first welding speed and performing welding by applying a first welding heat input, a second step following the first step for moving the welding means at a second welding speed and performing welding by applying a second welding heat input, and a third step following the second step for stopping the movement of the welding means and performing welding for 0.1 - 2 seconds at that stopped position. The first step includes welding performed on a welding unit under conditions wherein the first welding speed is less than the second welding speed and the first welding input heat exceeds ...

OVERLAPPED BLANK FOR HOT STAMPING, METHOD OF MANUFACTURING OVERLAPPED HOT STAMP MOLDED BODY, AND OVERLAPPED HOT STAMP MOLDED BODY

... [Problem] To solve a problem related to the difference in temperature increase speed between a layered part and a sheet part, and improving post-hot-stamping plating corrosion resistance. [Solution] A layered blank for hot stamping, the blank comprising a first steel sheet and at least one second steel sheet that is connected to the surface of the first steel sheet by welding points and has a smaller area than the first steel sheet. The first steel sheet is a plated steel sheet comprising an aluminum plating layer on both sides of the first steel sheet, and the second steel sheet is a plated steel sheet comprising an aluminum plating layer on both sides of the second steel sheet. W1 (g/m2) is the average amount of aluminum plating layer deposited on both sides of the first steel sheet. W2 (g/m2) is the amount of aluminum plating layer deposited on the side of the second steel sheet that does not contact the first steel sheet. W1 and W2 are both within a range of 20 g/m2 to 120 g/m2, inclusive ...

METHOD FOR IMPROVING FATIGUE STRENGTH OF LAP-WELDED JOINT, LAP-WELDED JOINT MANUFACTURING METHOD, AND LAP-WELDED JOINT

The fatigue strength of a lap-welded joint 10, wherein an overlap portion 12a of a first steel member 12 and an overlap portion 14a of a second steel member 14 are overlapped, and the edge portion of the first steel member 12 is welded to the surface (14b) of the second steel member 14 by means of a welded part 16 extending along that edge portion, is improved by the following method. First, with the direction perpendicular to the direction of extension of the welded part 16 and parallel to the surface 14b of the second steel member 14 as the reference direction Y, movement of the lap-welded joint 10 in the reference direction Y is restricted, and movement of the first steel member 12 and the second steel member 14 in the plate thickness direction is restricted. In this state a portion 14a of the second steel member 14 is heated so as to form a melted part 18 on the portion 14a of the second steel member 14.

METHOD OF FORMING FILLET ARC WELDED JOINT AND FILLET ARC WELDED JOINT

Stiffening beads (55A, 5513) are formed in turned portions in a region of a fillet bead (53) formed in a single stroke manner. At this time, it is set in such a manner that welding start positions of the stiffening beads (55A, 55B) are in a region near the fillet bead and do not exist independently without mixing with other weld beads.

ADDITIVE MANUFACTURING SYSTEMS FOR AND A METHOD OF SURFACE OVERLAY BEFORE JOINING, USING A PLURALITY OF ANCHORING MATERIALS AND TEMPERATURE CONTROL DEVICE

An additive manufacturing system (10) includes an additive manufacturing tool (18) configured to supply a plurality of droplets (20) to a part (12), a temperature control device (30) configured to control a temperature of the part (12), and a controller (30) configured to control the composition, formation, and application of each droplet (20) to the plurality of droplets (20) to the part (12) independent from control of the temperature of the part (142) via the temperature control device (30). The plurality of droplets (20) is configured to build up the part (12). Each droplet (20) of the plurality of droplets (20) includes at least one metallic anchoring material.

CONSUMABLE ELECTRODE TYPE ARC WELDING METHOD AND DEVICE

Method for gas-shielded arc brazing of steel sheet

A method for gas-shielded arc brazing of a steel sheet; wherein a solid wire containing copper, as a main component, and aluminum is used in arc brazing of a steel sheet; and the method including periodically carrying out pulse droplet transfer and short circuit droplet transfer in arc brazing using, as a shielding gas, a mixed gas consisting of 0.03 to 0.3% by volume of oxygen gas and the remainder which is argon.

Fillet welded joint and manufacturing method for same

Method of manufacturing metal containers with filling the interior of the container with a granuar refractory material before welding

Seamless welding process for copper pipe

Method of manufacture of welded products, and device for the application of the method

Improvements brought to the processes and the installations to manufacture containers of great capacity

Improvements with the mobile devices of carriages on rails for welding and analogues

Improvements brought to the devices to carry out weldings according to plane lines

High strength steel pipe for low-temperature usage having excellent buckling resistance and toughness of welded heat affected zone and method for producing the same

An APIX100-grade high strength steel pipe includes a base material containing, in mass percentage, C: more than 0.03% and 0.08% or less, Si: 0.01% to 0.5%, Mn: 1.5% to 3.0%, P: 0.015% or less, S: 0.005% or less, Al: 0.01% to 0.08%, Nb: 0.005% to 0.025%, Ti: 0.005% to 0.025%, N: 0.001% to 0.010%, O: 0.005% or less, and B: 0.0003% to 0.0020%, further contains one or more of Cu, Ni, Cr, Mo, and V, satisfies 0.19≦P cm ≦0.25, the balance being Fe and unavoidable impurities, and has a TS of 760 to 930 MPa, a uniform elongation of 5% or more, and a YR of 85% or less; the seam weld metal has a specific composition.

Method for welding shafts on a vertical rotational axis

A first tubular, inner radial annular seam is produced to weld together two hollow cylinders by narrow-gap tungsten inert gas arc welding. Narrow-gap metal gas-shielded arc welding is used to create another tubular, outer radial annular seam to further weld together both hollow cylinders. In this manner, the rotational axis of the rotor shaft remains vertically aligned throughout the entire production method of welding together the shaft parts. In this manner, the required production time can be advantageously reduced and the use of welding filler can be effectively decreased.

Orbital Welding Apparatus

A pipe welding arrangement that allows for real-time independent control of all carriages, torches, and ancillary components by design. The invention uses a split-ring race that is mounted on a backing ring of similar design. Numerous welding heads are mounted on carriages that are distributed at set intervals along the circumference of the race. The left and right side race and backing ring assemblies are split at the twelve o'clock and six o'clock positions. They can be decoupled and spread apart horizontally to facilitate installation and for clearing obstacles. Alignment tools (tapered pins) facilitate assembly. Locking devices located near each split interface, coupled with the alignment pins, assure that the race acts as a continuous unit during the welding operation. Linear actuators mounted on the backing rings maintain concentricity between the race and the welded tube and act as a positive clamping system.

High strength stick electrode

A shielded metal arc welding electrode for depositing a high strength weld metal bead on a workpiece which satisfies the strength requirements under America Welding Society A5.5 standard's E11018M classification with no chromium added to the composition of the electrode.

Method For Arc-Welding Aluminum-Coated Metal Parts Using Oxidizing Gas

The invention relates to an electric arc welding method for welding at least one metal part including an aluminum based surface coating, using a shielding gas. According to the invention, the metal of the aforementioned metal part is melted by the electric arc alone without the use of any laser beam. The invention is characterized in that the shielding gas comprises a mixture of argon and/or helium, nitrogen, and an oxidizing compound selected from oxygen and carbon dioxide.

WELDER WITH POSITIONAL HEAT CONTROL AND METHOD OF USING SAME

An electric arc welder for producing a weave pattern across a workpiece with a succession of individual weld short runs or bead, each of which has a center portion extending between two transversely spaced edges. The welder comprising a power source, a wire feeder to direct a welding wire through a movable torch to the workpiece and a controller for creating a welding current between the wire and the workpiece. A mechanical device is used to move the torch along the bead and the controller has a program to perform a first weld process while the torch is moving along the center portion and a second weld process when the torch is adjacent the edges, where the first weld process has less heat input than the second weld process. 1. An electric arc welder for producing a weave pattern across a workpiece with a succession of individual weld runs each of which has a center portion extending between two transversely spaced edges , the welder comprising:a power source;a wire feeder; anda controller for causing the power source to perform a first weld process in the center portion and a second weld process adjacent at least a first one of the edges, wherein the second weld process is a different process than the first weld process and wherein the first weld process is selected from the group consisting of short arc transfer GMAW, surface tension transfer, low power mode, low WFS, negative polarity shorting transfer, low duty cycle VP-GMAW and CMT transfer.2. An electric arc welder as defined in wherein the controller performs the second weld process adjacent both of the edges.3. An electric arc welder as defined in wherein the controller performs the second weld process adjacent a second one of the edges.4. An electric arc welder as defined in wherein the first weld process is a lower heat process than the second weld process.5. An electric arc welder as defined in wherein the second weld process is selected from the class consisting of spray transfer GMAW claim 4 , pulsed ...

Method for manufacturing vehicle body frame

A method of manufacturing a vehicle body frame of the present invention is a method of manufacturing a vehicle body frame including a roof structure, side structures that face each other, and a floor structure. The method includes a primary joining step of butt-joining only one set of face plates among the inner face plates and outer face plates of the plurality of panel boards that form the side structures, and manufacturing intermediate bodies of the side structures; a structure joining step of joining the roof structure, the floor structure, and the intermediate bodies; and a secondary joining step of joining, after the structure joining step, the other set of face plates among the inner face plates and the outer face plates of the plurality of panel boards that form the intermediate bodies to complete the side structures.

PROCESS FOR PRODUCING LARGE DIAMETER, HIGH STRENGTH, CORROSION-RESISTANT WELDED PIPE AND PIPE MADE THEREBY

A method of roll-forming sheet or plate into a round hollow, welding the round hollow with a welding alloy that matches the alloy of the round hollow to form a welded pipe, annealing the welded pipe at a minimum of 1950° F. to provide a carbide-free microstructure, ultrasonic inspecting to assure sound welds, and cold-working the annealed and inspected pipe via drawing or pilgering to the desired tensile strength. The compositional range alloys suitable for use in the method of the present invention in weight % is: 25.0-65.0% Ni, 15.0-30.0% Cr, 0-18.0% Mo, 2.5-48.0% Fe, 0-5.0% Cu, 0-5.0% Mn, 0-5.0% Nb, 0-2.0 Ti, 0-5.0% W, 0-1.0% Si, and 0.005-0.1% C. The process has been most preferably optimized for an alloy range consisting of 32.0-46% Ni, 19.5-28.0% Cr, 18.0-40.0% Fe, 3.0-8.0% Mo, 1.0-3.0% Cu, 0.6-1.2% Ti, 0.5-2.0% Mn, 0.1-0.5% Si, 0.01-0.08% C. The present invention also includes the pipe made thereby. 1. A process for the manufacture of large diameter pipe having high strength and corrosion resistance , suitable for use in sour gas and oil wells as drill pipe , casings , and transport pipe for petroleum products , comprising the steps of:(a) providing an alloy of a composition comprising in weight %: 25.0-65.0% Ni, 15.0-30.0% Cr, 0-18% Mo, 2.5-48.0% Fe, 0-5.0% Cu, 0-5.0% Mn, 0-5.0% Nb, 0-2.0 Ti, 0-5.0% W, 0-1.0% Si, and 0.005-0.1% C;(b) forming the alloy of step (a) into annealed plate or sheet;(c) roll-forming the plate or sheet of step (b) into an elongated, hollow round shape;(d) welding the elongated round shape along a longitudinal seam to provide welded pipe shell;(e) annealing the welded pipe shell at a time and temperature sufficient to provide a carbide-free microstructure; and(f) cold-working the annealed pipe shell by elongating said shell to a desired tensile strength for a finished pipe of a desired outside diameter.2. The process of claim 1 , wherein the alloy provided in step (a) comprises: 32.0-46.0% Ni claim 1 , 19.5-28.0% Cr claim 1 , 18.0-40. ...

Welding solid wire and weld metal

The objective of the present invention is to provide a similar-metal-composition welding solid wire, and weld metals therefor, with which both excellent bead shape and high ultralow-temperature toughness for the weld joints can be achieved when welding 9% Ni steels together by means of a high-efficiency MIG welding method. A fixed ratio of a REM and O are included in a similar-metal-composition welding solid wire of a 9% NI steel base material, and oxygen is supplied in a trace amount in a range that does not hinder the ultralow-temperature toughness of the weld joint ( 1 a ) but that is capable of forming fine REM oxides in the weld metal ( 3 ) and of controlling the weld metal to produce an excellent bead shape. In addition, both Al and Ti are regulated and an argon gas that contains little or no carbon dioxide gas is used as the shield gas in the MIG welding method. Thus, both an excellent bead shape and high ultralow-temperature toughness for the weld joint ( 1 a ) can be achieved.

Device for transverse seam welding

A device and a method for the positionally accurate arrangement of two material ends located opposite each other. The device includes two carriers with always one fixing device for each material end, wherein at least one of the two carriers is slidably guided relative to the second of the carriers, and at least the first carrier has a first adjusting member and a second adjusting member connected to the first adjusting member, wherein the adjusting members form a drive by means of which the first carrier is slidable against the second carrier.

Self-leveling welding tractor

A welding tractor is described as well as a process for using the tractor in which a predefined angle of inclination or declination is maintained during a circumferential welding process.

WELDING FILLER MATERIAL FOR BONDING DIFFERENT KIND MATERIALS, AND METHOD FOR PRODUCING DIFFERENT KIND MATERIAL WELDED STRUCTURE

Provided are a welding filler material for bonding different kind materials that improves joint strength and reduces cracks at the bonded part in different kind material bonding of an aluminum material or an aluminum alloy material and a steel material and has difficulty to break at the time of the wire drawing process, and a method for producing a different kind material welded structure. The welding filler material is formed by containing at least 1.0% by mass to 6.0% by mass of Si and 0.01% by mass to 0.30% by mass of Ti with a remainder being aluminum and inevitable impurities. Alternatively, the welding filler material is formed by filling a flux into a sheath material so that the filling rate is 2.0% by mass to 20.0% by mass relative to the mass of the whole wire, where the sheath material is formed of an aluminum alloy that contains at least 1.0% by mass to 6.0% by mass of Si and 0.01% by mass to 0.30% by mass of Ti with the remainder being aluminum and inevitable impurities. An aluminum material or an aluminum alloy material and a steel material are welded with each other using one of these welding filler materials. 1. A material comprising:an aluminum alloy comprising at least 1.0% by mass to 6.0% by mass of Si and 0.01% by mass to 0.30% by mass of Ti with a remainder being aluminum and inevitable impurities.2. A material comprising:a sheath material comprising an aluminum alloy comprising at least 1.0% by mass to 6.0% by mass of Si and 0.01% by mass to 0.30% by mass of Ti with a remainder being aluminum and inevitable impurities; anda flux filled in the sheath material,wherein a filling amount of the flux is 2.0% by mass to 20.0% by mass relative to a mass of a whole wire consisting of said sheath material and said flux.3. The material according to claim 1 ,wherein the aluminum alloy further comprises 0.01% by mass to 0.30% by mass of Zr.4. The material according to claim 1 ,wherein the aluminum alloy further comprises at least one element selected from ...

Welding system

A welding system is disclosed that includes a power supply, a controller in communication with the power supply, and a welder in communication with the controller. The controller detects a configuration of the welder that includes at least a 1G configuration. Upon the controller detecting the 1G configuration, the controller inverts a height adjustment and automatically calculates a contact tip to work distance.

WELDING CONDITION GENERATING METHOD IN FLAT POSITION WELDING

A welding condition generating method in flat position welding is a method for determining welding conditions for welding in a single V groove, a single bevel groove, or a fillet groove in a flat position using a welding robot. The method includes preparing conditions A and B, each including a plurality of different parameters used in calculation for determining the welding conditions; and generating the welding conditions by combining parameters included in the conditions A and B. The condition A includes at least one of the following parameters: a joint shape, a groove shape, a groove angle, a gap width, and the presence or absence of backing. The condition B includes at least one of the following parameters: a welding gas type, a welding wire diameter, a welding wire type, a welding wire extension length, a welding source type, a power source characteristic, and a torch type. 1. A welding condition generating method for determining welding conditions for welding in a single V groove , a single bevel groove , or a fillet groove in a flat position using a welding robot , the welding condition generating method comprising:preparing a condition A and a condition B, each including a plurality of different parameters used in calculation for determining the welding conditions; andgenerating the welding conditions by combining at least one of the parameters included in the condition A with at least one of the parameters included in the condition B,wherein the condition A includes a type of joint and groove shape, and geometrical parameters of a workpiece to be subjected to welding and a groove corresponding to the type; andthe condition B includes parameters related to welding specifications.2. The welding condition generating method according to claim 1 , wherein the condition A includes at least one of the following parameters: a joint shape claim 1 , a groove shape claim 1 , a groove angle claim 1 , a gap width claim 1 , and the presence or absence of backing.3. The ...

Systems and methods for use in welding pipe segments of a pipeline

A system for welding two pipes includes a first pipe clamp, a second pipe clamp, a weld torch, an inspection detector, a motor, one or more processors, and a grinder. The weld torch is configured to create a weld joint between the pipes at an interface region between the pipes. The inspection detector is configured to emit an inspection beam of radiation. The motor is operatively associated with the inspection detector to direct the inspection beam of radiation along the weld joint between the pipes. The one or more processors are operatively associated with the inspection detector to determine a profile of the weld joint between the pipes. The grinder is configured to grind at least a portion of the weld joint between the pipes based on the profile of the weld joint between the pipes.

JOINING METAL OR ALLOY COMPONENTS USING ELECTRIC CURRENT

A system may include a current source; a first metal or alloy component with a first major surface electrically coupled to the current source; a second metal or alloy component with a second major surface electrically coupled in series to the first component and the current source via an external electrical conductor, where the first and second major surfaces are positioned adjacent to each other to define a joint region; a metal or alloy powder disposed in at least a portion of the joint region; and a controller. The controller may be configured to cause the current source to output an alternating current that conducts through the first component and the second component to induce magnetic eddy currents, magnetic hysteresis, or both within at least a portion of the metal or alloy powder disposed in at least the first portion of the joint region. 1. A system comprising:a current source;a first component comprising a first metal or alloy and a first major surface, wherein the first component is electrically coupled to the current source; the first major surface and the second major surface are positioned adjacent to each other to define a joint region between adjacent portions of the first major surface and the second major surface, and', 'the second component is electrically coupled in series to the first component and the current source via an external electrical conductor;, 'a second component comprising a second metal or alloy and a second major surface, whereina metal or alloy powder disposed in at least a portion of the joint region; conducts through the first component adjacent to at least a first portion of the joint region and through the second component adjacent to at least the first portion of the joint region, and', 'induces magnetic eddy currents, magnetic hysteresis, or both within at least a portion of the metal or alloy powder disposed in at least the first portion of the joint region., 'a controller configured to cause the current source to output a ...

Joining structure

Second member (20) includes a material that is difficult to weld to first member (10). First member (10) is provided with non-through hole (11) having a depth not penetrating in a thickness direction. Third member (30) is welded, via penetrating part (21) of second member (20), to an inner peripheral surface and a bottom of non-through hole (11) and opening surface (10a) of first member (10) opened by penetrating part (11) of second member (20). Second member (20) is compressed by flange (31) and first member (10) by solidification contraction of third member (30), and second member (20) is therefore fixed between flange (31) of third member (30) and first member (10).

ABRASION RESISTANT WELDED STEEL PIPE AND METHOD OF PRODUCING THE SAME

In an abrasion resistant welded steel pipe, each of a base material and a weld metal contains specific amounts of chemical composition. The base material of the abrasion resistant welded steel pipe has a Vickers hardness within the range of 150 to 250, and the weld metal has a Vickers hardness within the range of 230 to 350. A weld heat affected zone in the abrasion resistant welded steel pipe has a Vickers hardness within the range of 150 to 350. In the weld metal, the dispersion density of a sulfide having an aspect ratio of 5 or more and containing at least one selected from Fe, Mn, and Ti is 10 grains/mmor less. The abrasion resistant welded steel pipe that can be produced at high productivity and low cost with no reduction in weld crack resistance can be provided. 2. The abrasion resistant welded steel pipe according to claim 1 , wherein the chemical composition of at least one of the base material and the weld metal of the abrasion resistant welded steel pipe include claim 1 , in terms of percent by mass claim 1 , at least one selected from Nb: 0.005% or more and 1.000% or less and V: 0.005% or more and 1.000% or less.3. The abrasion resistant welded steel pipe according to claim 1 , wherein the base material of the abrasion resistant welded steel pipe has a metallographic structure including: a matrix structure including a ferrite structure and a pearlite structure; and a hard phase dispersed in the matrix structure.4. The abrasion resistant welded steel pipe according to claim 3 , wherein a dispersion density of the hard phase is 400 grains/mmor more.6. The method of producing the abrasion resistant welded steel pipe according to claim 5 , wherein the butt welding is performed by submerged arc welding.7. The abrasion resistant welded steel pipe according to claim 2 , wherein the base material of the abrasion resistant welded steel pipe has a metallographic structure including: a matrix structure including a ferrite structure and a pearlite structure; and a ...

WELDING DEVICE AND WELDING SYSTEM

A welding device which performs butt welding of tubes includes a table. The table supports a rotary member of a circular-arc shape to which a welding torch is mounted, and a gear train that rotates the rotary member around a center axis of the tubes. The welding device includes a first movement mechanism that moves the table in a first direction perpendicular to the center axis of the tubes, and a second movement mechanism that moves the first movement mechanism in a second direction perpendicular to the center axis of the tubes and the first direction. 1. A welding device which performs butt welding of tubes , comprising:a rotary member of a circular-arc shape to which a welding torch is mounted, the rotary member including external teeth;a gear train that meshes with the rotary member and rotates the rotary member around a center axis of the tubes;a table supporting the rotary member and the gear train;a first movement mechanism that moves the table in a first direction perpendicular to the center axis of the tubes; anda second movement mechanism that moves the first movement mechanism in a second direction perpendicular to the center axis of the tubes and the first direction.2. The welding device according to claim 1 , further comprising:a third movement mechanism that moves the second movement mechanism along the center axis of the tubes; anda clamp mechanism that secures the third movement mechanism to the tube.3. The welding device according to claim 1 ,wherein the welding torch includes an electrode that generates an arc between the electrode and a welding area of the tubes, the welding device further comprising:a measuring unit that measures a distance between the electrode and the welding area; anda controller that controls the first drive mechanism and the second drive mechanism in such a manner that the distance measured by the measuring unit becomes a predetermined value.4. A welding system used to perform on a horizontal plane butt welding of a first ...

SOLID WIRE FOR GAS SHIELDED ARC WELDING, WELD METAL BY GAS SHIELDED ARC WELDING, WELDED JOINT, WELDMENT, WELDING METHOD, AND PRODUCTION METHOD OF WELDED JOINT

A solid wire for gas shielded arc welding comprising the following in terms of mass-% with respect to a total mass of the wire including plating: C: from 0.03 to 0.15%, Si: from 0.2 to 0.5%, Mn: from 0.3 to 0.8%, P: 0.02% or less, S: 0.02% or less, Al: from 0.1 to 0.3%, Ti: from 0.001 to 0.2%, Cu: from 0 to 0.5%, Cr: from 0 to 2.5%, Nb: from 0 to 1.0%, and V: from 0 to 1.0%, wherein the balance is Fe and impurities, and the following value of X is in a range of from 1.5 to 3.5 mass %. A welding metal, wherein the X value of the following formula is in a range of from 1.0 to 4.0%. Further, a welded joint, a weldment, and a welding method of the welded joint, utilizing the solid wire or the weld metal. 2. The solid wire for gas shielded arc welding according to claim 1 , comprising one claim 1 , or two or more kinds of the following in terms of mass % with respect to the total mass of the wire including plating:Cu: from 0.05 to 0.5%,Cr: from 0.005 to 2.5%,Nb: from 0.005 to 1.0%, orV: from 0.005 to 1.0%.4. The weld metal by gas shielded arc welding according to claim 3 , further comprising one claim 3 , or two or more kinds of the following in terms of mass % with respect to the total mass of the weld metal:Cu: from 0 to 0.3%,Cr: from 0 to 1.5%,Nb: from 0 to 0.7%, orV: from 0 to 0.7%.5. A welded joint comprising a weld metal formed by gas shielded arc welding at a joint claim 3 , and two base metals claim 3 , which sandwich the weld metal claim 3 , and at least one of which is a zinc-coated steel sheet or a zinc alloy-coated steel sheet claim 3 , wherein the weld metal is the weld metal by gas shielded arc welding according to .6. The welded joint according to claim 5 , wherein the zinc-coated steel sheet or the zinc alloy-coated steel sheet comprises Al in a range of from 0.01 to 0.3 mass % with respect to a total mass of the steel sheet.7. A weldment comprising the welded joint according to .8. A welding method for welding two base metals claim 1 , at least one of ...

Orbital welder with torch adjustment assembly

A welding system for applying a weld to a workpiece, the welding system including a torch head frame, a welding torch supported on the frame, the welding torch including an electrode; a fillet adjustment assembly including a mounting block, wherein the torch head frame is pivotally attached to the mounting block and pivotable about a fillet axis, the fillet adjustment assembly including a fillet locking assembly adapted to hold the torch head at a selected fillet angle relative to the mounting block. The welding system also includes a lead lag axis about which the torch head is adjusted.

MAGNETICALLY IMPELLED ARC BUTT WELDING METHOD HAVING MAGNET ARRANGEMENT FOR WELDING COMPONENTS HAVING COMPLEX CURVATURES

A magnet arrangement for a magnetically impelled arc butt welding system, wherein the system is used to weld an airfoil to a platform of a gas turbine. The magnet arrangement includes a first plurality of magnets wherein the magnets are located adjacent a first curved airfoil surface and arranged in a first curved shape corresponding to a shape of the first curved airfoil surface. The magnet arrangement also includes a second plurality of magnets wherein the magnets are located adjacent a second curved airfoil surface and arranged in a second curved shape corresponding to a shape of the second curved airfoil surface such that the first plurality of magnets has a different curvature than the second plurality of magnets. The first and second plurality of magnets guide an electric arc of the system along mating surfaces to heat the mating surfaces to enable the airfoil and platform to be forged together. 1. A magnet arrangement for a magnetically impelled arc butt welding system , wherein the system is used to weld a first component to a second component , wherein the first and second components each have first and second component curved surfaces and wherein the first and second component curved surfaces have different curvatures relative to each other , comprising:a first plurality of magnets arranged in a first curved shape corresponding to a shape of the first component curved surface; anda second plurality of magnets arranged in a second curved shape corresponding to a shape of the second component curved surface such that the first plurality of magnets has a different curvature than the second plurality of magnets.2. The magnet arrangement according to claim 1 , further including at least one secondary magnet located in a hollow of the first component.3. The magnet arrangement according to claim 2 , wherein the secondary magnet is substantially wedge shaped.4. The magnet arrangement according to claim 1 , further including at least one secondary magnet located ...

Welding structure of press formed part, structural part for automotive body including the welding structure, and method for manufacturing welding part (as amended)

A welding structure of a press-formed part made by combining and joining two parts formed by press-forming and each having an opening portion on at least one side of a cross-section, while the opening portions face each other, and includes a step portion that is provided by forming a bent projection projecting outwardly on a tip end portion of a side wall portion of a lower side part, partially or entirely on a joining surface. A tip end side of the step portion is fitted into the opening portion of an upper side part, and the step portion of the lower side part and the tip end of a side wall portion of the upper side part are linearly joined by arc welding.

JUNCTION STRUCTURE

Second member () includes a material that is difficult to weld to first member (). First member () is provided with first penetrating part () penetrating in a thickness direction. Third member () is arc-welded to an inner peripheral surface of first penetrating part () and opening surface () of first member () via second penetrating part () of second member (). Second member () is compressed by flange () and first member () by solidification contraction of third member (), and second member () is therefore fixed between flange () of third member () and first member (). 1. A joining structure joining , to each other , a first member including a metal material , a second member including a material that is difficult to weld to the first member , and a third member including a filler material welded to the first member , whereinthe first member includes a first penetrating part penetrating in a thickness direction,the second member includes a second penetrating part that opens at a position corresponding to the first penetrating part,the third member includes a flange that presses a peripheral edge of the second penetrating part, and is arc-welded, via the second penetrating part, to an inner peripheral surface of the first penetrating part of the first member and an opening surface of the first member opened by the second penetrating part of the second member, andthe second member is compressed by the flange and the first member by solidification contraction of the third member, and thus the second member is fixed between the flange and the first member.2. The joining structure according to claim 1 , wherein the flange protrudes radially outward from the second penetrating part on a surface of the second member opposite to the first member.3. The joining structure according to claim 1 , whereinthe second penetrating part is defined by the peripheral edge,the peripheral edge includes a tapered part tapered toward the first member, andthe flange presses the tapered part ...

CONTROL HEAD AND MAGNETIC HOLDER FOR AUTOMATIC WELDING

Double magnetic coupling for two welding heads that work parallel and independent at the front and at the back, (N) and (S), in paramagnetic and diamagnetic materials. 1) A system for welding , comprising:a control head and magnetic holder, comprising:an outer side, comprising: a first magnet, a torch, a first gas duct, a first pipeline for cooling, an external mechanical support, means for welding control, and a first gas diffuser; andan inner side, comprising: a second magnet, a second gas diffuser, a second gas duct, a second pipeline for cooling, and means for translation; andwherein said outer and inner sides are magnetically coupled.2) The system of claim 1 , wherein the outer side comprises means to control the displacement of the first magnet.3) The system of claim 2 , wherein the outer side comprises means for visual inspection.4) The system of claim 2 , wherein the inner side comprises means for translation.5) The system of claim 2 , wherein the torch is selected from the group of welding instruments consisting of tungsten electrodes claim 2 , MIG claim 2 , laser claim 2 , plasma and hybrid.6) The system of claim 3 , wherein the inner side comprises means for translation.7) The system of wherein plates to be welded are placed between the outer and inner sides of the control head.8) The system of claim 2 , wherein the inner side comprises means to control the displacement of the second magnet.9) The system of claim 1 , wherein the inner side comprises means to control the displacement of the second magnet.10) The system of claim 1 , wherein the inner side comprises means for translation.11) A system for welding claim 1 , comprising:a control head and magnetic holder, comprising:an outer side, comprising: a first magnet, a first torch, a first gas duct, a first pipeline for cooling, an external mechanical support, means for welding control, and a first gas diffuser; andan inner side, comprising: a second magnet, a second torch, a second gas diffuser, a ...

PIPE JOINT, FLUID CONTROL DEVICE, FLUID CONTROL UNIT, SEMICONDUCTOR FABRICATION APPARATUS AND METHOD OF FORMING PIPE JOINT

A pipe joint includes a first member, a second member, a weld experiencing transverse contraction and joining a first outer cylindrical end portion and a second outer cylindrical end portion butted with their end faces meeting over the entire circumference, an annular sealed area produced by the transverse contraction of the weld causing a first pressing portion and a second pressing portion to be displaced toward each other, a heat transmission suppressing member arranged in a space delimited by a weld forming area and a to-be-sealed area, inside the first and second members assembled, to suppress transmission of heat applied in welding from the weld forming area to a to-be-sealed area, and a first stop ring fitted in an outer cylindrical surface of the heat transmission suppressing member to hold the heat transmission suppressing member against an inner surface of the first or the second member. 1. A pipe joint , comprisinga first member having a first outer cylindrical end portion at an end and a first pressing portion located inside the first outer cylindrical end portion,a second member having a second outer cylindrical end portion at an end and a second pressing portion located inside the second outer cylindrical end portion,a fluid flow passage formed to extend at least either inside the first pression portion or inside the second pressing portion,a weld experiencing transverse contraction and joining together the first and the second outer cylindrical end portions, formed by butting the first and the second outer cylindrical end portions with their end faces meeting over the entire circumference and performing welding at the outer circumferential edge of the meeting end faces,an annular sealed area produced between the first and second pressing portions by the transverse contraction of the weld causing the first and the second pressing portions to be displaced toward each other,a heat transmission suppressing member arranged in a space delimited by a weld ...

Support Ring and Fabrication Method for Subsea Pipelines

A support ring supports a welding ring to guide welding bugs around a coated pipe section. The support ring has a tubular body to support the welding ring, the body having substantially circular curvature around a longitudinal axis. At least one grounding extension connected to the body is offset longitudinally and radially outwardly with respect to the body and the longitudinal axis. This allows the grounding extension to lie radially outboard of a parent coating of the pipe section while the body encircles a cut-back end zone where the parent coating has been cut back. Pipe sections abutting end-to-end for welding can each be fitted with these support rings. This enables welding rings to encircle both of the cut-back end zones and allows effective grounding connections to be made without enlarging the cut-back end zones. 1. A support ring for supporting a welding ring to encircle a pipe section , the support ring having:a tubular body with substantially circular curvature around a longitudinal axis to support the welding ring; andat least one grounding extension connected to the body;wherein the grounding extension is offset longitudinally and radially outwardly with respect to the body and the longitudinal axis.2. The support ring of claim 1 , wherein the or each grounding extension has ground connector provisions to which one or more earthing wires can be attached.3. The support ring of claim 1 , comprising a step extending in a radially-outward direction between the body and the or each grounding extension to connect the extension to the body and to effect the radial offset of the extension with respect to the body.4. The support ring of claim 3 , wherein the step is joined directly to the body claim 3 , or wherein the step is joined to the body via a longitudinally-extending tab.5. The support ring of claim 4 , wherein when the step is joined directly to the body claim 4 , the step is joined to the body at a longitudinal edge of the body.6. (canceled)7. The ...

METHOD OF FORMING A STEEL PART AND STEEL PART

A method of forming a steel part is provided. The method includes the steps of coating a first steel plate to obtain a first precoat upon the first steel plate so as to define a first base, a first intermetallic alloy layer on the first base and a first metal alloy layer on the first intermetallic alloy layer. On a first face of the first steel plate the first metal alloy layer is removed in a first area of the first steel plate, while at least part of the first intermetallic alloy layer in the first area remains. A second steel plate is coated to obtain a second precoat upon the second steel plate so as to define a second base, a second intermetallic alloy layer on the second base and a second metal alloy layer on the second intermetallic alloy layer. On a second face of the second steel plate, the second metal alloy layer is removed in a second area of the second metal plate, while at least part of the second intermetallic alloy layer in the second area remains. After removal of the first and second metal alloy layers, the first steel plate is butt-welded to the second steel plate at the first and second areas to form a welded blank. A heat treatment is performed on the welded blank. The welded blank is shaped after the heat treatment into the steel part. A steel part is also provided. 1. A method of forming a steel part , the method comprising:coating a first steel plate to obtain a first precoat upon the first steel plate so as to define a first base, a first intermetallic alloy layer on the first base and a first metal alloy layer on the first intermetallic alloy layer;on a first face of the first steel plate, removing the first metal alloy layer in a first area of the first steel plate, while leaving at least part of the first intermetallic alloy layer in the first area;coating a second steel plate to obtain a second precoat upon the second steel plate so as to define a second base, a second intermetallic alloy layer on the second base and a second metal alloy ...

Method of Manufacturing Actively Cooled Accelerator Grid with Full Penetration Weld Configuration

Disclosed is an improved method of manufacturing cooled accelerator grid with full penetration weld configuration. In a preferred form, the method includes the steps of: machining a plurality of stubs, a first and a second end of a plurality of inconel pipes; welding the stubs with the first end of the inconel pipes forming a water connector assembly; machining of a base plate; welding the base plate with the water connector assembly; machining the base plate welded with the water connector assembly, wherein machining further comprises milling of plurality of cooling channels across angled plane of the base plate welded with the water connector assembly; closing of plurality of cooling channels located on the base plate welded with the water connector assembly; and welding each of plurality of external hydraulic circuits with the second end of each of the plurality of inconel pipes. 1. A method of manufacturing actively cooled accelerator grid with full penetration weld configuration comprising the steps of:a) machining a plurality of stubs;b) machining a first end and a second end of each of a plurality of inconel pipes;c) welding each of the plurality of the stubs with the first end of the each of the plurality of inconel pipes, thereby forming a water connector assembly;d) machining a base plate to prepare a plurality of weld edges in ‘U’ shape in accordance to a plurality of reference holes located on the base plate;e) full penetration welding of the base plate with the water connector assembly by electron beam welding;f) machining the base plate welded with the water connector assembly to create a hydraulic passage up to the manifold, wherein machining further comprises milling of a plurality of cooling channels across angled plane of the base plate welded with the water connector assembly;g) welding each of a plurality of external hydraulic circuits with the second end of the each of the plurality of inconel pipes.2. The method as claimed in claim 1 , wherein ...

WELD PROTECTING DEVICE BY GAS DIFFUSION

A weld protecting device by gas diffusion including several elements mounted one after the other and hinged to each other, and including a front element, intermediate elements mounted one after the other and behind the front element. A back element is mounted behind the last intermediate element, each element including a housing open downwards and towards each other adjacent element, forming a gas diffusion chamber, wherein two adjacent elements are hinged to each other and they are free to pivot relative to each other, regardless of the operating conditions of the protecting device. A facility for welding two opposite edges of two pieces, a weld protecting device, and a system for guiding the protecting device are disclosed. 1. A device for protecting a weld by gaseous diffusion including several elements mounted one after another and hinged to each other , and including , from a front end to a back end according to alignment of the elements:a front element to accommodate a welding head;intermediate elements mounted one after another and behind the front element,a back element mounted behind a last intermediate element,each element including a housing open downwards and towards each other adjacent element, all the housings forming a gas diffusion chamber which is connected to a protection gas supply source;wherein two adjacent elements are hinged to each other and are free to pivot relative to each other,and wherein the two adjacent elements are hinged to each other by a swivel connection, and are free to pivot relative to each other along any direction.2. The protecting device according to claim 1 , wherein a first element among the two adjacent elements includes a hemispherical shaped housing which is open towards the second element of the two adjacent elements and the second element includes an insert with a hemispherical shape complementary to the hemispherical housing of the first element claim 1 , and the insert is accommodated in the hemispherical housing of ...

STRESS RELIEVED WELDS IN POSITIVE EXPULSION FUEL TANKS WITH ELASTOMERIC DIAPHRAGM

A metallic positive expulsion fuel tank with stress free weld seams may include a first hemispherical shell with a first edge; a pressurized gas inlet attached to the first hemispherical shell; and a metallic cylinder with first and second edges attached to the first hemispherical shell along matching first edges by a first weld seam. The tank may also include a second hemispherical shell with a first edge attached to a fuel outlet fixture. An elastomeric diaphragm may be attached to the fuel outlet fixture on the second hemispherical shell. The second hemispherical shell may be attached to the second edge of the metallic cylinder along matching edges by a second weld seam thereby forming a positive expulsion fuel tank with two interior chambers separated by the elastomeric diaphragm. The first and second weld seams may be subjected to a localized post-weld stress relief heat treatment in which heating of the tank is confined to a distance of 2 inches (5.08 cm) of the first weld seam and a distance of 2 inches (5.08 cm) of the second weld seam such that the stresses in the first and second weld seams are relieved and the elastomeric diaphragm is unaffected by the heat treatment. 1. A metallic positive expulsion fuel tank comprising:a first hemispherical shell with a circumferential edge;a pressurized propellant gas inlet attached to the first hemispherical shell;a metallic cylinder with first and second circumferential edges wherein the first circumferential edge is attached to the circumferential edge of the first hemispherical shell by a first weld seam;a second hemispherical shell with a circumferential edge;a fuel outlet fixture attached to the second hemispherical shell;a hemispherical elastomeric diaphragm attached to the fuel outlet fixture;a second hemispherical shell attached to the second circumferential edge of the cylinder by a second weld seam forming two interior chambers separated by the elastomeric diaphragm;the first and second weld seams being ...

TANK FABRICATING EQUIPMENT

A design for tank fabricating equipment and system comprises a frame supporting opposing arms for supporting one or more tank shells. The opposing arms pivotally engage opposing sides of the tank shells to force them into a circular cross-sectional shape. The arms are provided with rollers for aligning the tank shell with adjacent components during fabrication. In some embodiments, the rollers are provided with a circumferential channel to accommodate welding seams and to ensure alignment of butt joints. 1. A system for processing a portion of tank from at least two tank components , at least one of which is a tank shell; the system comprising:a frame composed of at least one structural member, the frame having a center line;at least one drive roller mounted on the frame;a first set of arm members and a second set of arm members, the first set disposed on the opposite side of the center line of the frame from the second set;at least one roller mounted on each arm in the first and second sets of arms;wherein a first end of each arm member in each set is pivotally mounted onto the frame so that each arm and the roller thereon may be selectively pivoted toward and away from the center line of the frame to cause the rollers to come in contact with a tank shell disposed on the at least one drive roller;wherein contact on a tank shell by the rollers may force the tank shell into a circular cross-sectional shape;wherein at least one roller attached to one of the first set of arms contacts a tank shell disposed on the rollers above the horizontal plane that bisects a tank shell disposed on the rollers; andwherein at least one roller attached to one of the second set of arms contacts a tank shell disposed on the rollers above the horizontal plane that bisects a tank shell disposed on the rollers.2. The system of wherein each roller further comprises a circumferential channel formed in the surface of the roller.3. The system of having a first coating on the outer surface of ...

DEVICE AND METHOD FOR AUTOMATIC NARROW GAP TIG WELDING

A welding device includes a welding torch having an electrode, an oscillation assembly having an oscillation shaft, and a connection member. The welding torch is affixed to the connection member at a first point and the oscillation shaft is affixed to the connection member at a second point. An extension of the axis of the oscillation shaft intersects with the axis of the welding torch at an intersection point. The distance from the intersection point to the tip of the electrode is less than a distance from the first point on the connection member to the tip of the electrode. During operation, the oscillation in the oscillation shaft is transferred through the connection member to the welding torch and causes pendulum type oscillations in the welding torch with the intersection point serving as the pivot point of the oscillation. 1. A welding device , comprising:a welding torch having an electrode, wherein a tip of the electrode is exposed;an oscillation assembly comprising an oscillation shaft; anda connection member,wherein the welding torch is affixed to the connection member at a first point and the oscillation shaft is affixed to the connection member at a second point,wherein an extension of an axis of the oscillation shaft intersects with an axis of the welding torch at an intersection point,wherein a distance from the intersection point to the tip of the electrode is less than a distance from the first point on the connection member to the tip of the electrode,wherein, during operation, an oscillation in the oscillation shaft is transferred through the connection member to the welding torch and causes a pendulum type oscillation in the welding torch, and the intersection point is a pivot point of the oscillation.2. The welding device of claim 1 , wherein the electrode is a tungsten electrode.3. The welding device of claim 1 , wherein the welding torch is a TIG torch.4. A method for narrow gap welding claim 1 , comprising:forming a weld groove on a workpiece ...

DEVICE FOR WELDING PIPE BRANCHES AND EXTENSIONS

A device for welding pipe branches and extensions to a main pipe from inside the main pipe. The device includes a frame () and a frame cylinder (), an elongated electrode shaft () having a longitudinal central axis, around which the electrode shaft is rotatably arranged, a rotator disc () of the electrode shaft (), through which the electrode shaft is able to slide axially, an electrode holder () in the end of the electrode shaft, an electrode () fastened to the holder (), a welding jig () for supporting the main pipe (a) in the welding station, a fastening element (a) of the welding jig, a rotating element () of the welding jig, to which the fastening element is fastened and which is rotatably bearing-mounted inside the frame cylinder () such that the rotational axis of the welding jig combines with the central axis of the electrode shaft. The welding jig has a support bracket () for the main pipe (a), by which the main pipe is to be supported in the station, in which the centre axes of the main pipe (a) and the electrode shaft () are combined. The welding jig has, surrounding the electrode shaft (), an adapter piece (), to which is connected a shielding gas channel (), the shielding gas being adapted to be guided through the adapter piece (), into the main pipe, and through it, also into the pipe branch or extension to be welded, when the main pipe, or the pipe extension () to be welded to the main pipe, or the shielding gas pipe () surrounding the main pipe rests against the adapter piece (). The rotator disc () of the electrode shaft is equipped with a locking device (), with which the electrode shaft () is to be immovably locked in relation to the rotator disc (). 13031313345411213232425612288931121324256122616122332324236323231312313aaaa. A device for welding pipe branches and extensions to a main pipe from inside the main pipe , the device including a frame () and a frame cylinder () , an elongated electrode shaft () having a longitudinal central axis , ...

METHOD OF SEALING NUCLEAR REACTOR FUEL ELEMENTS HAVING A CASING MADE OF HIGH-CHROMIUM STEEL

The invention relates to nuclear power and can be used in manufacturing of fuel elements for nuclear reactors. A method of sealing nuclear reactor fuel elements is proposed comprising welding one end of a casing with a plug, both of high-chromium steel, loading the fuel element with fuel, and welding a second plug to another end of the casing. The casing is of a high-chromium ferrite-martensite steel and the plug is of a high-chromium ferrite steel. Argon arc welding is carried out at a volume ratio of the materials of the casing and the plug contributing to formation of the metal of the weld seam which allows formation of a ferrite phase in said metal, wherein the ratio is: V/V>18, where Vis the volume of ferrite material and Vis the volume of ferrite-martensite material. Argon arc welding is carried out at a current of 14-20 A, a speed of 12-15 m/h, an arc voltage of 9-10 W and an argon flow rate of 7-8 1/min. This method provides for the desired quality of the welded joins and simplifies the fuel element manufacturing process. 2. The method of claim 1 , characterized in that the argon arc welding is carried out at a current of 14-20 A claim 1 , a speed of 12-15 m/h claim 1 , an arc voltage of 9-10 W and an argon flow rate of 7-8 l/min. The invention relates to nuclear power and can be used in the manufacture of fuel elements for power reactors.There is a known method for sealing fuel elements, wherein the welding is carried out by melting the casing end together with the plug using the non-consumable electrode in the atmosphere of shielding gases (U.S. Pat. No. 3,045,108).The disadvantage of the method is in that the arc is ignited by the contact between the electrode and the cylindrical projection of the plug, wherein tungsten inclusions get into the weld pool which can reduce the strength and, correspondingly, the quality of a welding joint.The other known method of sealing fuel elements by fusion welding comprises welding the plug made of the same material as ...

Method of producing ferritic heat-resistant steel welded joint

A method of producing a ferritic heat-resistant steel welded joint, the method including: a multi-layer welding step in which a ferritic heat-resistant steel base material including B at 0.006% by mass to 0.023% by mass is multi-layer welded using a Ni-based welding material for heat-resistant alloy, wherein root pass welding is performed under a welding condition such that a ratio of an area [S BM ] that has been melted of the ferritic heat-resistant steel base material to an area [S WM ] of a weld metal, in a transverse cross-section of a weldment after the root pass welding but before second pass welding in the multi-layer welding step, satisfies the following formula (1): 0.1≤[S BM ]/[S WM ]≤−50×[% B BM ]+1.3, with respect to a mass percent of B, [% B BM ], which is included in the ferritic heat-resistant steel base material.

METHOD AND SYSTEM FOR PIPELINE WELDING

A method is disclosed. The method includes disposing an automated welding device adjacent to a pipe joint and welding an open root pass via the automated welding device using the predefined welding process, wherein the predefined welding process is configured to control a welding arc in response to a short circuit condition. A secondary welding process can be overlaid on the predefined welding process by cycling welding parameter of the predefined welding process can be cycled between a high parameter value and a low parameter value about a base parameter value. Further, an arc between the automated welding device and the pipe joint can be maintained during welding. Because the welding parameter is cycled between a high and low parameter value, the automated welding device can deliver consistent successful welds. 1. A method comprising:disposing an automated welding device adjacent to a pipe joint formed by clamping a plurality of pipes, wherein the automated welding device is disposed on an outer surface of at least one pipe of the plurality of pipes;selecting a predefined welding process from a library of welding processes, wherein the predefined welding process is configured to control a welding arc in response to a short circuit condition;selecting a welding parameter of the predefined welding process;overlaying the predefined welding process with a secondary welding process by cycling the welding parameter between a high parameter value and a low parameter value about a base parameter value;welding an open root pass between the plurality of pipes via the automated welding device using the predefined welding process, wherein the welding parameter is cycled between the high parameter value and the low parameter value about the base parameter value; andmaintaining an arc between the automated welding device and the pipe joint during welding.2. The method of claim 1 , wherein welding comprises mechanized automated welding.3. The method of claim 1 , wherein welding ...

ROTATING WELDING SYSTEM AND METHODS

A field system for welding two pipes includes a first pipe engagement structure, a second pipe engagement structure, one or more weld torches, a motor and one or more processors. The one or more weld torches are configured to be positioned within the pipes to create an internal weld at an interface region between the pipes. The motor is operatively associated with the one or more weld torches to rotate the one or more weld torch along the interface region between the pipes. The one or more processors control the motor and the one or more weld torches. The one or more processors operate the motor and the one or more weld torches to generate a complete circumferential weld along the interface region by rotating the one or more weld torches along the interface region in a single rotational direction until the complete circumferential weld is completed. 1307.-. (canceled)308. A field system for welding two pipes , comprising:a first pipe engagement structure configured to engage the interior surface of a first pipe to enable the first pipe engagement structure to be fixed relative to the first pipe;a second pipe engagement structure configured to engage the interior surface of a second pipe to enable the second pipe engagement structure to be fixed relative to the second pipe;one or more weld torches configured to be positioned within the pipes to create an internal weld at an interface region between the pipes;a motor operatively associated with the one or more weld torches to rotate the one or more weld torches along the interface region between the pipes; andone or more processors that control the motor and the one or more weld torches, the one or more processors operating the motor and the one or more weld torches to generate a complete circumferential weld along the interface region by rotating the one or more weld torches along the interface region in a single rotational direction until the complete circumferential weld is completed.309. The field system according ...

Fillet welded joint and method of production of same

The present invention provides a fillet welded joint and a method of production of a fillet welded joint which can raise the productivity of the method of production of a fillet welded joint and a fillet welded joint without sacrificing the strength against fatigue fracture of the welded structural member. The fillet welded joint of the present invention is a fillet welded joint formed by fillet welding at least two metal members, wherein, on the surface of at least one of the metal members, the fillet welded joint comprises a press bead of a rib-shaped projection provided by press-forming so as to project upward to the side having a weld bead formed by the fillet welding, and part of the press bead contacts or overlaps the weld bead.

Flowforming corrosion resistant alloy tubes

Flowforming processes for the production of corrosion resistant alloy tubes are disclosed.

INTERNALLY WELDED PIPES

A welded pipe assembly includes a first and a second metal pipes, and a welded joint or welded material connecting the first pipe with the second pipe. The first and second metal pipes each have a length of at least 30′ and an exterior diameter of less than 24″. The weld material includes a plurality of weld pass layers including a first internal pass layer and a second internal pass layer disposed on top of the first internal pass layer. The second internal pass layer is positioned closer to an interior longitudinal axis of the welded first and second pipes than the first internal pass layer. The welded joint includes a first internal bevel formed in the first metal pipe and a second internal bevel formed in the second metal pipe. The first internal pass layer is disposed in a region defined by the first and the second internal bevels. 1301.-. (canceled)302. A welded pipe assembly comprising:a first metal pipe having a length of at least 30′ and an exterior diameter of less than 24″;a second metal pipe having a length of at least 30′ and an exterior diameter of less than 24″; andweld material connecting the first metal pipe with the second metal pipe, the weld material comprising a plurality of weld pass layers, the plurality of weld pass layers including a root pass layer and a hot pass layer disposed on top of the root pass layer,wherein the hot pass layer is positioned closer to an interior longitudinal axis of the welded first and second metal pipes than the root pass layer.303. The welded pipe assembly according to claim 302 , wherein the hot pass layer of the weld material has at least a portion thereof disposed closer to the longitudinal axis than the interior surfaces of the welded pipes in regions of the welded pipes immediately adjacent to the weld material on opposite sides of the weld material.304. The welded pipe assembly according to or claim 302 , wherein a first end of the first metal pipe is welded to a second end of the second metal pipe claim 302 ...

WELDING POWER SUPPLY IDENTIFICATION OF REMOTE SWITCH OPERATION

A welding system includes a power supply configured to output a series of welding waveforms for generating a welding current in a consumable welding electrode, and a wire feeder that advances the electrode toward a weld puddle during a welding operation. The wire feeder includes a subcircuit having a switching device and parallel resistance, the subcircuit being connected in series with the electrode such that the welding current flows through the subcircuit. The switching device is controllable between conducting and nonconducting states. The wire feeder includes a controller operatively connected to the switching device that controls switching operations of the switching device. The power supply is configured to remotely identify occurrences of the switching operations in the wire feeder and control the welding waveforms based on the occurrences of the switching operations. 1. A welding system , comprising:a power supply configured to output a series of welding waveforms for generating a welding current in a consumable welding electrode; a subcircuit comprising a switching device and parallel resistance, said subcircuit being connected in series with the consumable welding electrode such that the welding current flows through the subcircuit, wherein the switching device is controllable between a conducting state and a nonconducting state; and', 'a controller operatively connected to the switching device and configured to control switching operations of the switching device,, 'a wire feeder that advances the consumable welding electrode toward a weld puddle during a welding operation, wherein the wire feeder compriseswherein the power supply is configured to remotely identify occurrences of the switching operations in the wire feeder and control the welding waveforms based on the occurrences of the switching operations.2. The welding system of claim 1 , further comprising a power cable conducting the welding current from the power supply to the wire feeder claim 1 ...

ARC WELDING APPARATUS, CONSTANT VOLTAGE CHARACTERISTIC WELDING POWER SOURCE, AND METHOD FOR PERFORMING ARC WELDING

An arc welding apparatus includes a lifting motor. A speed adjustment circuit controls the lifting motor such that the rising speed of the welder decreases if a current of the welding power source is smaller than a set value, or increases if the value of the current is larger than the set value. A voltage adjustment circuit controls the welding power source such that the voltage increases if the number of times that the voltage falls below a determination voltage is larger than a set number of times or if periods for which the voltage remains below the determination voltage are longer than a set time, or decreases if the number of times that the voltage falls below a determination voltage is smaller than a set number of times or if periods for which the voltage remains below the determination voltage is shorter than a set time. 1. An arc welding apparatus that performs vertical-up welding by generating an arc in a groove between steel plates to be welded and forming a molten pool , the arc welding apparatus comprising:welding means for performing arc welding by generating the arc from a welding wire in the groove between the steel plates to be welded in a substantially vertically downward direction and forming the molten pool;lifting means for lifting the welding means in a substantially vertically upward direction relative to the steel plates to be welded;a welding power source that feeds current to the welding wire to generate the arc;speed control means for monitoring current output from the welding power source and, if a value of the output current is smaller than a value of current set in advance, controlling the lifting means such that rising speed of the welding means decreases or, if the value of the output current is larger than the set value of current, controlling the lifting means such that the rising speed of the welding means increases; andvoltage control means for monitoring voltage output from the welding power source during the welding, obtaining ...

SYSTEMS AND METHODS FOR USE IN WELDING PIPE SEGMENTS OF A PIPELINE

The present application relates to a field system and methods that can be deployed in the application of pipe welding. The field system provides many embodiments relating to pipe welding systems and methods, that can be used in combination with one another, or individually. Such welding systems and methods, include, for example, internal welding systems and methods, tie-in welding system and methods, pipe inspection systems and methods, pipe handling systems and methods, internal pipe cooling systems and methods, non-destructive testing systems and methods, as well as remote interface and database systems and methods (uLog), to name a few. The application further relates to welded pipes that result from some or all of such processes. 1. A method for welding a pair of insulated pipes to one another , each pipe comprising a metal pipe interior surrounded by an insulator material , wherein end portions of the pipes to be welded have the metal pipe interior exposed , the method comprising:aligning the exposed metal pipe ends to be welded;welding the exposed metal pipe ends to one another;heating the exposed end portions of the welded pipes;applying an insulator to the heated exposed end portions of the welded pipes such that the insulator is adhered to an exterior surface of the metal pipe interior, thus insulating the formerly exposed end portions of the pipes; andapplying cooling energy from within the pipes to an interior surface of the metal pipes.2. The method according to claim 1 , wherein the cooling energy is applied by a fluid released within the interior of the pipes such that the fluid directly contacts the interior surface of the pipes.3. The method according to claim 1 , wherein the cooling energy is applied by a movable fluid disposed within a heat exchanger claim 1 , wherein a contact surface of the heat exchanger is configured to be positioned in contact with the interior surface of the welded pipes to remove heat from the welded pipes.4. The method ...

HORIZONTAL BUTT JOINT HIGH DEPOSITION WELDING APPARATUS AND METHOD THEREFOR

The present invention provides an apparatus and a method for high deposition welding a horizontal butt joint which can form a high deposition welded part while forming a root part when high deposition welding is carried out relative to a bevel in case of automatic welding of a horizontal butt joint, thereby achieving high deposition welding without any defect of the inside and surface of a welded cross section and reducing the number of welding passes. The horizontal butt joint high deposition welding apparatus is installed on a traveling device part in a welding direction by a welding tip so as to move in a forward direction of welding progress and a horizontal butt joint high deposition welding method, thereby preventing the molten metal from running down, allowing a user to easily handle the apparatus, reducing weight, and completing surface beads because a lower part is filled with molten metal. 1. A horizontal butt joint high deposition welding apparatus comprising:a traveling device part for periodically repeating weaving and conveying of a welding tip in a specific direction relative to an upper parent metal and a lower parent metal;a welding torch which has a welding tip and is mounted on the traveling device part;a copper shoe device which is mounted on the traveling device part to be located in a welding direction by the welding tip; anda control unit for controlling welding conditions according to weaving positions of the welding torch in consideration of a bevel form of a horizontal welding joint,wherein the control unit conveys the traveling device part to perform weaving traveling along a plurality of nodal points and controls one of welding current, welding voltage, wire supply speed, traveling speed in a movement section between the nodal points, stopping time at the nodal points, weaving speed and weaving width to carry out high deposition welding relative to the bevels.2. The horizontal butt joint high deposition welding apparatus according to ...

Hot-wire welding assembly for deep and narrow recessed gaps

A contact tip for hot-wire welder is provided that are adapted to operate in deep and narrow recessed gaps within a work piece. Contact tips in accordance with the current invention provide for an assembly having a body portion with a cavity and an extension portion which is inserted into the cavity. The extension portion is non-electrically conductive and allows the contact tip assembly to reach into deep, narrow grooves without worry of shorting the contact tip of the consumable.

Welding carriage

A welding carriage traveling with a welding torch mounted thereon includes: a carriage body; and a torch supporting part disposed between the front and rear ends of carriage body and supporting a tip of the welding torch in a state of positioning on a side surface side of the carriage body and facing diagonally downward. The torch supporting part includes a torch swinging unit and a weaving unit. The torch swinging unit includes a torch swinging mechanism which swings the tip of the welding torch in a forward and rearward direction of the carriage body, and thereby moves tip close to the welding line. The weaving unit includes a weaving mechanism which operates so as to integrally rotate a unit case and a torch mounting bar of the torch swinging unit about a screw, thereby to cause the welding torch to perform a weaving operation.

JOINING METAL OR ALLOY COMPONENTS USING ELECTRIC CURRENT

A system may include a current source; a first metal or alloy component with a first major surface electrically coupled to the current source; a second metal or alloy component with a second major surface electrically coupled in series to the first component and the current source via an external electrical conductor, where the first and second major surfaces are positioned adjacent to each other to define a joint region; a metal or alloy powder disposed in at least a portion of the joint region; and a controller. The controller may be configured to cause the current source to output an alternating current that conducts through the first component and the second component to induce magnetic eddy currents, magnetic hysteresis, or both within at least a portion of the metal or alloy powder disposed in at least the first portion of the joint region. 1. A system , comprising:a first metal or alloy component with a first major surface; anda second metal or alloy component with second major surface, wherein the first major surface and the second major surface are adjacent to each other and define joint region;a metal or alloy powder disposed in at least a portion of the joint region;a first current source electrically coupled in series to the first metal or alloy component and the first current source via a first external electrical conductor;a second current source electrically coupled in series to the second metal or alloy component and the second current source via a second external electrical conductor;a controller configured to:cause the first current source to output a first alternating current that conducts through the first component adjacent to a first portion of the joint region to induce at least one of magnetic eddy currents or magnetic hysteresis within at least a first portion of the metal or alloy powder disposed in the first portion of the joint region; andcause the second current source to output a second alternating current that conducts through the ...

PORTABLE ROBOTIC WELDER FOR NUCLEAR WASTE HANDLING

An automated welding system for sealing high level radioactive waste containers in the field at the nuclear plant site. The system includes a programmable portable robotic welder comprising a multi-jointed articulating robotic arm. A welding head operable to form a weld is mounted to the arm. Operation of the robotic welder and ancillary components is controlled by a programmable controller which implements a welding plan. In one embodiment, a circumferentially-extending lid-to-shell hermetic seal weld may be formed by the robotic welder. The weld is completed in multiple welding passes through the weld joint between the lid and shell guided by an automated joint tracking sensor linked to the controller. The highly portable robotic welder is detachably mountable on the lid to perform the welding. An automated pivotable cable-conduit management apparatus keeps electrically conductive wiring and flow tubing out of the path of the rotating robotic arm during welding. 1. A robotic welding system for containment of radioactive nuclear waste comprising:a container defining a cavity configured to hold the nuclear waste;a lid disposed on the container and defining an open weld joint therebetween; anda programmable robotic welder positioned over the lid, the robotic welder programmable and operable to automatically form a weld in the weld joint.2. The system according to claim 1 , wherein the robotic welder includes a rotatable articulating arm assembly and a welding head disposed at a distal end thereof operable to form the weld.3. The system according to claim 2 , wherein the welding head comprises a welding wire and a gas nozzle fluidly coupled to a shielding gas source claim 2 , the gas nozzle operable to dispense the shielding gas when forming the weld.4. The system according to claim 3 , further comprising a cooling water system fluidly coupled to the welding head.5. The system according to claim 4 , further comprising an automatic welding wire feeder disposed on the ...

PIPE ASSEMBLY STATION

A pipe assembly station for performing operations on a field joint during pipe assembly has an active rail extending around an opening through which the pipe can pass. Tool carriages are arranged to traverse along the active rail and around a periphery of the pipe. The station also comprises a standby position, distanced from the active rail and a switch arranged to transfer the tool carriage from the active rail to the standby position. By providing such a combination of a rail and a standby position, a tool carriage can be brought into position on the active rail to perform a pipe joining operation and can be subsequently set back to the standby position, where it is out of the way of operations taking place on the pipe. Such a switching arrangement allows for more effective use of the limited space around the joint. 1. A pipe assembly station for supporting tools during an operation on a field joint during pipe assembly , the station comprising:an active rail extending around an opening through which the pipe can pass;a tool carriage arranged to traverse along the active rail and around a periphery of the pipe;a standby position distanced from the active rail; anda switch arranged to allow transfer of the tool carriage from the active rail to the standby position.2. The station according to claim 1 , wherein the tool carriage is self propelled.3. The station according to claim 1 , wherein the active rail is continuous allowing the tool carriage to pass completely around the pipe.4. The station according to claim 1 , wherein the active rail has a movable portion that can be moved to allow lateral passage of the pipe to and from the opening.5. The station according to claim 1 , rail claim 1 , further comprising a standby rail extending from the switch to the standby position.6. The station according to claim 5 , wherein the standby rail extends in a U-shape from the switch to the standby position and back to a further position adjacent to the active rail and ...

WELDING METHOD

A welding method wherein the root gap aperture displacement is measured before welding begins, and a welding material having a Mn/S ratio and a Mn/Si ratio compatible with the measured root gap aperture displacement is selected from gas-shielded arc welding materials. Gas-shielded arc welding is then performed using the selected welding material. 13-. (canceled)4. A method for performing welding under fluctuating stress , the method comprising:measuring a root opening width variation before start of welding; andselecting a welding consumable having Mn/S and Mn/Si ratios accommodating the measured root opening width variation from among gas shielded arc welding consumables.5. The method of claim 4 , wherein claim 4 , when a root opening width variation during welding is measured claim 4 , and the measured root opening width variation exceeds an allowable value assumed to select the welding consumable claim 4 , quality of a welded joint formed at a time when the measured root opening width variation exceeds the allowable value is inspected.6. The method of claim 4 , wherein the welding consumable is selected based on a root opening. This application is a national stage application, filed under 35 U.S.C. §371, of International Application No. PCT/JP2013/002322, filed Apr. 3, 2013, which claims priority to Japanese Application No. 2012-086827, filed Apr. 5, 2012, the contents of both of which being hereby incorporated by reference in their entirety.1. Technical FieldThe technique disclosed herein relates to a gas shielded metal arc welding method for use in, for example, butt welding of steel plates.2. Description of Related ArtIn recent years, an increase in traffic volume or an increase in vehicle weight has caused damage to already-existing bridges, and the already-existing bridges, therefore, have been repaired or reinforced. To address such an increase in traffic volume or such an increase in vehicle weight, the functionality of the bridges has been enhanced. For ...

WELDING-TYPE POWER SUPPLIES WITH JOB SPECIFIC WELD MONITORING SYSTEMS

Systems and methods for tracking and associating welding-type data with selected welding jobs. A welding job from a plurality of welding jobs stored in memory of a welding-type power supply may be selected, and welding-type data collected while a particular welding jobs is selected is associated in memory with the selected welding job. Welding-type data associated with the plurality of welding jobs may be displayed and managed.

WELDING DEVICE AND METHOD FOR CONTROLLING WELDING DEVICE

A welding apparatus includes an articulated robot having a plurality of drive shafts, an end effector supported by the articulated robot, a tip shaft drive mechanism, and a drive control unit. The tip shaft drive mechanism is provided between a tip drive shaft of the articulated robot and the end effector and allows a tip shaft of the end effector to perform a weaving operation. The drive control unit drives the articulated robot and the tip shaft drive mechanism. The tip shaft drive mechanism includes a first-axis drive unit which drives the tip shaft in a first-axis direction that is perpendicular to the tip shaft of the end effector and a second-axis drive unit which drives the tip shaft in a second-axis direction that is perpendicular to the tip shaft and the first-axis direction. 1. A welding apparatus comprising:an articulated robot having a plurality of drive shafts;an end effector supported by the articulated robot;a tip shaft drive mechanism which is provided between a tip drive shaft of the articulated robot and the end effector and allows a tip shaft of the end effector to perform a weaving operation; anda drive control unit which drives the articulated robot and the tip shaft drive mechanism,wherein the tip shaft drive mechanism has a first-axis drive unit which drives the tip shaft in a first-axis direction that is perpendicular to the tip shaft of the end effector and a second-axis drive unit which drives the tip shaft in a second-axis direction that is perpendicular to the tip shaft and the first-axis direction.2. A welding apparatus comprising:an articulated robot having a plurality of drive shafts;an end effector supported by the articulated robot;a tip shaft drive mechanism which is provided between a tip drive shaft of the articulated robot and the end effector and allows a tip shaft of the end effector to perform a weaving operation; anda drive control unit which drives the articulated robot and the tip shaft drive mechanism, wherein:the drive ...

Welding torch with upper and lower shielding gas flow and welding method using welding torch for horizontal welding

A welding torch ( 1 ) includes a cylindrical nozzle ( 2 ) in which shielding gas is flown from an opening ( 3 b ), and an electrode ( 4 ) that is a bar-shaped body projecting from the opening ( 3 b ). The shielding gas includes upper shielding gas flowing in an upper region ( 3 u ) on an upper side of a central axis (C 2 ) of the electrode ( 4 ), and lower shielding gas flowing in a lower region ( 3 d ) on a lower side of the central axis (C 2 ) of the electrode ( 4 ). Atmospheric pressure of the lower shielding gas is higher than atmospheric pressure of the upper shielding gas. A method of horizontal welding with this kind of welding torch is also defined.

APPARATUS FOR ARC WELDING AND METHOD OF USING THE SAME

Disclosed is an apparatus for arc welding, comprising: a torch body comprising a power supply line and a gas supply line; two or more metal segments movable relative to one another being sized and shaped to surround a seam between two elongated objects to be welded together, the two or more metal segments being in electrical communication with the power supply line; and a gas jacket attached to each of the metal segments. 1. An apparatus for arc welding , comprising:a torch body comprising a power supply line and a gas supply line;two or more metal segments movable relative to one another being sized and shaped to surround a seam between two elongated objects to be welded together, the two or more metal segments being in electrical communication with the power supply line; anda gas jacket attached to each of the metal segments.2. The apparatus of claim 1 , further comprising a shielding gas in communication with the gas supply line and the gas jacket claim 1 , wherein the shielding gas is an inert gas claim 1 , an active gas claim 1 , or a combination thereof.3. The apparatus of claim 2 , wherein the shielding gas is helium claim 2 , neon claim 2 , argon claim 2 , krypton claim 2 , xenon claim 2 , radon claim 2 , or a combination thereof.4. The apparatus of claim 1 , wherein the metal segments are equal to each other in size and shape.5. The apparatus of claim 1 , wherein the apparatus comprises three metal segments.6. The apparatus of claim 1 , wherein the apparatus comprises four metal segments.7. The apparatus of claim 1 , wherein the metal segments are curved and together the metal segments form an elliptical shape.8. The apparatus of claim 1 , wherein the metal segments comprise tungsten claim 1 , tungsten alloy claim 1 , or a combination thereof.9. The apparatus of claim 1 , wherein the metal segments are moveable in a radial direction via a screw mechanism.10. The apparatus of claim 9 , wherein the metal segments are moveable in a radial direction via a ...

ORBITAL WELDING SYSTEM AND METHOD

Embodiments are directed to an orbital welding system, including customized orbital weld head fixtures, and computer-controlled programs for performing homogeneous orbital welds. In one scenario, an orbital welding system includes a controller, a shield gas supply system that supplies gases to an orbital welding tool, an electrical supply system that supplies an electrical current to the orbital welding tool, and the orbital welding tool, which includes a welding electrode that is configured to weld two or more items together using the supplied electrical current and the gases supplied by the gas supply system. The controller generates control signals that direct the orbital welding tool, the electrical supply system, and the gas supply system to homogeneously orbital weld the at least two items together, so that the at least two items are homogeneously welded together without using a filler material. Various other methods, systems, and apparatuses are also described. 1. An orbital welding system , comprising:a controller;a shield gas supply system that supplies one or more inert or semi-inert gases to an orbital welding tool;an electrical supply system that supplies an electrical current to the orbital welding tool;a sensor; andthe orbital welding tool, which includes a welding electrode that is configured to weld two or more items together using the supplied electrical current and the one or more gases supplied by the gas supply system,wherein the controller automatically identifies a weld profile based on one or more sensor inputs received from the sensor, the weld profile being specific to the type of weld being performed and specific to the type of materials being welded together, andwherein the controller generates control signals according to the identified weld profile that direct the orbital welding tool, the electrical supply system, and the gas supply system to homogeneously orbital weld the at least two items together, such that the at least two items ...

HIGH-STRENGTH STEEL, METHOD FOR MANUFACTURING HIGH-STRENGTH STEEL, STEEL PIPE, AND METHOD FOR MANUFACTURING STEEL PIPE

High-strength steel having a specified chemical composition, wherein X (%) calculated by using equation (1): 2. The high-strength steel according to claim 1 , wherein the chemical composition of the high-strength steel further contains claim 1 , by mass % claim 1 , one or both of Cu: 0.50% or less and Ni: 0.50% or less.3. A steel pipe composed of the high-strength steel according to .4. A method for manufacturing the high-strength steel according to claim 1 , the method comprising:a heating process wherein a steel raw material is heated to a temperature of 1100° C. to 1200° C.;a hot rolling process wherein the steel raw material, which has been heated in the heating process, is hot-rolled under the conditions of an accumulated rolling reduction ratio in a temperature range of 900° C. or lower of 50% or more and a rolling finish temperature of 850° C. or lower; andan accelerated cooling process wherein the hot-rolled steel plate, which has been obtained in the hot rolling process, is subjected to accelerated cooling under the conditions of a cooling rate of 5° C./s or more and a cooling stop temperature of 300° C. to 550° C.5. A method for manufacturing a steel pipe claim 1 , the method comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a cold forming process wherein a steel plate composed of the high-strength steel according to is subjected to cold forming so as to be formed into a pipe shape; and'}a welding process wherein the butt portions of the steel plate, which has been formed into a pipe shape in the cold forming process, are welded.6. A steel pipe composed of the high-strength steel according to .7. A method for manufacturing the high-strength steel according to claim 2 , the method comprising:a heating process wherein a steel raw material is heated to a temperature of 1100° C. to 1200° C.;a hot rolling process wherein the steel raw material, which has been heated in the heating process, is hot-rolled under the conditions of an accumulated rolling ...

WELDING TORCH AND CORRESPONDING MANUFACTURING METHOD

A welding torch includes a head () having a body () bearing an electrode (); an electric power source (); and a filler metal wire () and a wire guide () guiding the filler metal wire () to the electrode (). The body () is obtained by additive manufacturing from an electrically conductive metal, and the electrode () is electrically connected to the electric power source () by the metal constituting the body (). The wire guide () includes an insulating sheath () inside which the filler metal wire () moves, and the filler metal wire () is electrically insulated from the potential of the body () by the insulating sheath (). 114-. (canceled)15. A welding torch comprising:a head having a body bearing an electrode;a power supply having an electric power source; anda filler metal wire and a wire guide guiding the filler metal wire to the electrode,the body being obtained by additive manufacturing from an electrically conductive metal, the electrode being electrically connected to the electric power source by the electrically conductive metal constituting the body, the wire guide comprising an insulating sheath inside which the filler metal wire moves, the filler metal wire being electrically insulated from a potential of the body by the insulating sheath.16. The welding torch according to claim 15 , further comprising a carrier integral with the head claim 15 , the carrier being obtained by additive manufacturing from an electrically conductive metal claim 15 , the electrode being electrically connected to the electric power source through the metal constituting the carrier claim 15 , the filler metal wire being electrically insulated from the potential of the carrier by the insulating sheath.17. The welding torch according to claim 16 , further comprising a base obtained by additive manufacturing from an electrically conductive metal claim 16 , the electrode being electrically connected to the electric power source through the electrically conductive metal constituting the ...

Joining of dissimilar materials

A method for joining a first part formed of an aluminum material to a second part formed of a steel material by metal inert gas welding and cold metal transfer is provided. An aluminum filler material forms a fillet joint between the parts and provides a structure for automotive body applications, such an aluminum bumper extrusion joined to a steel crush box connection. The first part includes a notch for hiding the start and end of the joint. A transition plate formed of a mixture of aluminum material and steel material can be disposed between the first part and the second part to provide the notch. The second part can include a mechanical fastener further joining the parts together. In another embodiment, the second part includes a plurality of dimples and is welded to the first part along the dimples.

Tube and Tubesheet Assembly with Damage Resistance and Method for Protecting Tube and Tubesheet Assemblies from Damage

A tube and tubesheet assembly is provided, which includes a tubesheet, the tubesheet comprising at least one tube insertion aperture therethrough; at least one tube inserted in the at least one tube insertion aperture; and a damage-resistant layer applied to an edge of the at least one tube and along an inner surface of a portion of the tube that is positioned within the corresponding tube insertion aperture. A heat exchanger including the assembly is also provided. A method is also provided for coupling a tube to a tubesheet. The method includes applying a damage-resistant layer to an edge of the tube and along an inner surface of a portion of the tube that is positioned within a tube insertion aperture in the tubesheet. The method can also be used to repair tubes and retrofit pre-existing tube-to-tubesheet joints. 1. A tube and tubesheet assembly , comprising:a tubesheet, the tubesheet comprising at least one tube insertion aperture therethrough;at least one tube inserted in the at least one tube insertion aperture; anda damage-resistant layer applied to an edge of the at least one tube and along an inner surface of a portion of the tube that is positioned within the corresponding tube insertion aperture.2. The assembly of claim 1 , wherein the damage-resistant layer is applied along the inner surface of the at least one tube to a depth that corresponds to at least the width of the tubesheet.3. The assembly of claim 2 , wherein the damage-resistant layer extends into the tube beyond the width of the tubesheet.4. The assembly of claim 1 , wherein the tube is rolled after being inserted into the tube insertion aperture to engage an inner surface of the tube insertion aperture.5. The assembly of claim 1 , wherein the tube is welded to the tubesheet after being inserted into the tube insertion aperture.6. The assembly of claim 1 , wherein the damage-resistant layer interfaces with an edge of tubesheet cladding adjacent the edge of the at least one tube.7. The assembly ...

WELDING APPARATUS

A welding apparatus includes a housing having facing surfaces in the axial direction, and a welding head turning gear and first to third ring gears inside of the housing. A guide surface is formed on the facing surfaces. The welding head turning gear is coupled to a guide member, and the first to third ring gears are supported by the welding head turning gear and the guide member. Since a roller provided to the guide member rolls on the guide surface to rotatably support the first to third ring gears with respect to the housing, the welding apparatus can be lighter in weight and more compact compared to a conventional welding apparatus. 1. A welding apparatus comprising:a housing in annular shape having a guide surface continuous in a circumferential direction of facing surfaces in an axial direction;a welding head turning gear in annular shape disposed between the facing surfaces, the welding head turning gear including internal teeth on an entire circumference of an inner peripheral surface of the welding head turning gear;a ring gear in annular shape disposed between the facing surfaces, the ring gear including internal teeth on an entire circumference of an inner peripheral surface and external teeth on at least a part of an outer peripheral surface of the ring gear, the ring gear pivotably provided with respect to the welding head turning gear at more than or equal to a predetermined angle;a turning input gear engaged with the internal teeth of the welding head turning gear and a ring input gear engaged with the internal teeth of the ring gear;a plurality of electric motors coupled to the housing and positioned at one side in the axial direction with respect to the housing, the plurality of electric motors configured to transmit torque to the turning input gear and the ring input gear;a ring output gear coupled to the welding head turning gear, the ring output gear engaged with the external teeth; anda welding head having a welding torch positioned at an other ...

HYBRID MANUAL AND AUTOMATED WELDING

Hybrid manual and automated welding systems and methods are described. A hand-held welding tool is manually positioned to engage a workpiece. A weld is started from an initial position based on a first manual operator event. A welding heat source is automatically or autonomously moved along the weld relative to the workpiece from the first position to a second position relative to the workpiece during welding. 1. A system , comprising:a hand-held welding tool that is manually placed in a welding position,wherein the hand-held welding tool is configured to be manually activated to cause a contact tip to automatically move from a first weld position and to second weld position during welding.2. The system of claim 1 , wherein a welding current and a wire feed speed used during the welding are concurrently controlled.3. The system of claim 2 , comprising:a welding power source operatively coupled to the hand-held welding tool, wherein the welding power source is configured to ramp current up and down in correspondence with a variable travel speed during the welding.4. The system of claim 1 , wherein a travel speed is not constant during the welding.5. The system of claim 1 , wherein the hand-held welding tool is configured to provide a linear weld when the contact tip is automatically moved from the first weld position to the second weld position.6. The system of claim 1 , comprising:a solenoid assembly configured to control the contact tip and to position the contact tip in the first weld position when the solenoid assembly is energized.7. The system of claim 6 , wherein the solenoid assembly is configured to position the contact tip in the second weld position when the solenoid assembly is de-energized.8. The system of claim 1 , wherein the hand-held welding tool includes a spring and a motion dampener claim 1 , wherein the spring and the motion dampener are configured to control a speed at which the contact tip automatically moves from the first weld position to the ...

WELDED MEMBER AND METHOD FOR MANUFACTURING SAME

A welded member includes a hot dip Zn-based alloy coated steel sheet as a base material and has excellent corrosion resistance and weld bead shear strength. In the welded member in which a lower sheet and an upper sheet, which are hot dip Zn-based alloy coated steel sheets, are stacked and arc-welded together, a weld bead is formed so that a cross-sectional width W satisfies the following formula 2T≤W≤6T, and a blowhole occupancy Br represented by the following formula (2) becomes not more than 50%: Br=(Σdi/L)×100, where T represents a thickness of the hot dip Zn-based alloy coated steel sheet, di represents a length of an i-th blowhole observed in X-ray radiography, and L represents a length of the weld bead. 1. A welded member comprising:a first hot dip Zn-based alloy coated steel sheet;a second hot dip Zn-based alloy coated steel sheet stacked on and arc-welded to a first sheet surface of the first hot dip Zn-based alloy coated steel sheet; anda weld bead that is provided on the first sheet surface such that the first hot dip Zn-based alloy coated steel sheet and the second hot dip Zn-based alloy coated steel sheet are welded together by the weld bead,{'sup': 2', '2, 'each of the first hot dip Zn-based alloy coated steel sheet and the second hot dip Zn-based alloy coated steel sheet having a coating weight of 15 g/mto 250 g/mper surface,'}the weld bead being formed such that a cross-sectional width W satisfies a formula (1) below and a blowhole occupancy Br represented by a formula (2) below becomes not more than 50%, the cross-sectional width W being a width of a cross section from one boundary between a Zn-based coating layer and the weld bead to the other boundary between the Zn-based coating layer and the weld bead on the first sheet surface, and the cross section being obtained by cutting the weld bead by a plane orthogonal to a direction in which the weld bead extends,the weld bead having at least two protrusion parts each of which protrudes into the first ...

JOINING OF DISSIMILAR MATERIALS

A method for joining a first part formed of an aluminum material to a second part formed of a steel material by metal inert gas welding and cold metal transfer is provided. An aluminum filler material forms a fillet joint between the parts and provides a structure for automotive body applications, such an aluminum bumper extrusion joined to a steel crush box connection. The first part includes a notch for hiding the start and end of the joint. A transition plate formed of a mixture of aluminum material and steel material can be disposed between the first part and the second part to provide the notch. The second part can include a mechanical fastener further joining the parts together. In another embodiment, the second part includes a plurality of dimples and is welded to the first part along the dimples. 1. A method for joining of dissimilar materials , comprising:providing a first part formed of an aluminum material;providing a second part formed of a steel material;disposing a transition plate formed of a mixture of aluminum material and steel material between the first part and the second part, wherein the transition plate includes a notch; andjoining the first part to the second part by a filler material extending along the transition plate, wherein the start and end of the joining step includes disposing the filler material in the notch.2. The method of claim 1 , wherein the joining step includes a cold metal transfer process claim 1 , and the cold metal transfer process includes providing a wire of the filler material having a free end spaced from the transition plate;providing an electric current to the wire to melt the free end of the wire and form an arc between the wire and the transition plate; andretracting the wire away from the transition plate each time a short circuit occurs to form a plurality of droplets of the filler material.3. A method for joining of dissimilar materials claim 1 , comprising:providing a first part formed of an aluminum material; ...

EARTH-BORING TOOLS HAVING PARTICLE-MATRIX COMPOSITE BODIES AND METHODS FOR WELDING PARTICLE-MATRIX COMPOSITE BODIES

Methods for welding a particle-matrix composite body to another body and repairing particle-matrix composite bodies are disclosed. Additionally, earth-boring tools having a joint that includes an overlapping root portion and a weld groove having a face portion with a first bevel portion and a second bevel portion are disclosed. In some embodiments, a particle-matrix bit body of an earth-boring tool may be repaired by removing a damaged portion, heating the particle-matrix composite bit body, and forming a built-up metallic structure thereon. In other embodiments, a particle-matrix composite body may be welded to a metallic body by forming a joint, heating the particle-matrix composite body, melting a metallic filler material forming a weld bead and cooling the welded particle-matrix composite body, metallic filler material and metallic body at a controlled rate. 1. A method of joining a particle-matrix composite body of an earth-boring tool to a metallic body , the method comprising: forming a first bevel portion and a second bevel portion in a face portion of a weld groove; and', 'forming an overlapping interface at least proximate a root portion of the weld groove;, 'forming a joint between a particle-matrix composite body of the earth-boring tool and a metallic body of the earth-boring tool, comprisingheating a volume of the particle-matrix composite body within the weld groove to an elevated first temperature below the melting temperature of the matrix material of the particle-matrix composite body;heating at least a portion of the volume of the particle-matrix composite body within the weld groove with a welding torch to a second temperature greater than the melting temperature of the matrix material of the particle-matrix composite body;melting a metallic filler material;forming a weld bead to weld the metallic filler to the particle-matrix composite body and to the metallic body at the joint;providing the welded particle-matrix composite body, metallic filler ...

Hygienic heat exchanger

A hygienic food product to food product heat exchanger ( 1 ). The heat exchanger ( 1 ) has an elongated and hollow housing ( 4 ), a metal tube plate ( 6 ) arranged at each of the opposite ends of the elongated housing ( 4 ) for defining a closed interior space ( 10 ) inside the elongated and hollow housing ( 4 ), a plurality of tightly spaced metal tubes ( 2 ) axially extending between the tube plates ( 2 ) with the ends of the tubes being received in correspondingly tightly spaced holes the tube plates ( 6 ) or with the lumen of the tubes being aligned with said correspondingly tightly spaced holes in the tube plates. The metal tubes ( 2 ) are sealingly secured to the metal tube plates ( 6 ) by a welding joint ( 20 ) on the inwardly facing side of the tube plates ( 6 ).

Turbine housing

A turbine housing includes an inner pipe that forms an exhaust air flow path in which a turbine wheel accommodating a turbine shaft is arranged; and an outer pipe that is spaced from the inner pipe at a predetermined distance and covers the inner pipe. At least one reinforcing plate is secured to an inner surface of the outer pipe.

FILLET ARC WELDED JOINT AND METHOD OF FORMING THE SAME

At least one stiffening bead () is formed by arc welding on a surface of at least one of metal members in addition to a fillet bead () formed by fillet arc welding. The stiffening bead () is formed to have an angle of 45° to 135° with respect to the fillet bead () and to overlap with the fillet bead (). The sum total l1 of lengths of stiffening beads () can be, for example, 0.5 times or more of a length L of the fillet bead (). 114-. (canceled)15. A fillet arc welded joint formed by fillet arc welding a metal member and a metal member , the fillet arc welded joint comprising:at least one stiffening bead formed by arc welding on a surface of at least one of the metal members in addition to a fillet bead formed by the fillet arc welding, [{'br': None, 'i': l', 'L, 'Sum total of lengths of stiffening beads≧×0.5\u2003\u2003(a1)'}, {'br': None, 'i': h', 't, 'Height of the stiffening beads≧/2\u2003\u2003(b)'}, {'br': None, 'i': w', 't, 'Width of the stiffening beads≧2.5\u2003\u2003(c)'}], 'wherein the stiffening bead is formed to have an angle of 45° to 135° with respect to the fillet bead and to overlap with the fillet bead, and is formed to satisfy conditions (a1), (b), and (c) belowL: Length (mm) of the fillet beadt: Thickness (mm) of the metal member on which the stiffening bead is formed.16. A fillet arc welded joint formed by fillet arc welding a metal member and a metal member , the fillet arc welded joint comprising:at least one stiffening bead formed by arc welding on a surface of at least one of the metal members in addition to a fillet bead formed by the fillet arc welding, [{'br': None, 'i': l', '×Wf,D}, 'Length of one stiffening bead≧max {2\u2003\u2003(a2)'}, {'br': None, 'i': h', 't, 'Height of the stiffening bead≧/2\u2003\u2003(b)'}, {'br': None, 'i': w', 't, 'Width of the stiffening bead≧2.5\u2003\u2003(c)'}], 'wherein the stiffening bead is formed to have an angle of 45° to 135° with respect to the fillet bead and to overlap with the fillet bead within a ...

DEVICE FOR THE ORBITAL PROCESSING OF NON-ROTATING JOINTS AND PIPE ENDS

The present device is configured for mounting on and movement around the outside surface of a pipe to be processed, and comprises a clamping device and a flexible composite carriage consisting of at least two pivotally connected component parts capable of pivoting about a pin of a hinged connection lying parallel to the axis of the pipe to be processed, wherein each part comprises a group of at least two coaxial supporting rollers, the axis of which is situated at a distance from the hinged connection that is less than or equal to ⅓ of the distance between the hinges of the component part and is parallel to the axis of the pipe to be processed. The component parts are connected in succession in such a way that each part bears on two groups of supporting rollers, one of which is mounted on the component part, and the other of which is mounted on an adjacent component part. One of the component parts of the carriage is mounted such as to rest on an additional group of supporting rollers. At least one component part is provided with a supporting and driving roller and with a driving mechanism having a source of torque, and at least one component part has at least one processing device. 1. A device for orbital processing of ends and non-rotating butt joints of a pipe configured for installation and movement around an outer surface of the pipe and comprising a clamping device and a flexible composite carriage consisting of at least two components joined together via a pivotal connection and configured to pivot only around a pivot pin of the pivotal connection lying parallel to an axis of the pipe , wherein each component of the flexible composite carriage comprises a group of at least two coaxial supporting rollers , an axis of which is situated at a distance from the pivotal connection that is less than or equal to ⅓ of a distance between hinges of the components and is parallel to the axis of the pipe , and wherein the components of the flexible composite carriage are ...

METHOD OF PREPARING A PIPE-SECTION

A method of preparing a pipe-section for welding to another pipe-section to form a pipeline comprising a plurality of said pipe-sections, the method comprising at least the steps of: (i) providing a pipe-section having first and second pipe-ends; (ii) defining a first portion L1 of the longitudinal length of the pipe-section from the first pipe-end being in the range 3% to 40% of the overall length of the pipe-section; (iii) defining a second portion L2 of the longitudinal length of the pipe-section from the end of the first portion L1 towards the second pipe-end; (iv) heating at least the first portion L1 to at least a first temperature T1 of at least 500° C. for at least 2 minutes; (v) maintaining a second temperature T2 of the second portion L2 during step (iv) below the first temperature T1. The invention is able to reduce the strain capacity during reel-laying of a pipeline formed from a plurality of pipe sections formed by the invention. 1. A method of preparing a pipe-section for welding to another pipe-section to form a pipeline comprising a plurality of said pipe-sections , the method comprising at least the steps of:(i) providing a pipe-section having first and second pipe-ends;{'b': '1', '(ii) defining a first portion L of the longitudinal length of the pipe-section from the first pipe-end being in the range 3% to 40% of the overall length of the pipe-section;'}{'b': 2', '1, '(iii) defining a second portion L of the longitudinal length of the pipe-section from the end of the first portion L towards the second pipe-end;'}{'b': 1', '1, '(iv) heating at least the first portion L to at least a first temperature T of at least 500° C. for at least 2 minutes;'}{'b': 2', '2', '1, '(v) maintaining a second temperature T of the second portion L during step (iv) below the first temperature T.'}221. The method as claimed in claim 1 , wherein step (iii) comprises defining the second portion L of the longitudinal length of the pipe-section from the end of the first ...

MACHINING, EXAMINATION, AND WELDING INTEGRAL DEVICE FOR NOZZLE

The present invention relates to a machining, examination, and welding integral device for a nozzle, and more particularly, to a machining, examination, and welding integral device for a nozzle in which machining, examination, and welding can be made in the nozzle by one device. To this end, there is provided a machining, examination, and welding integral device for a nozzle including: a pair of caps provided to be separated from each other; a welding unit provided between the pair of caps to weld a junction part of the nozzle and a pipe; a examination unit coupled to one side of the welding unit to check whether the junction part is defective; and a machining unit coupled to the top of the welding unit to remove the surface of a welded portion of the junction part and/or process the welded portion of the junction part. 1. A machining , examination , and welding integral device for a nozzle , comprising:a pair of caps provided to be separated from each other;a welding unit provided between the pair of caps to weld a junction part of the nozzle and a pipe;a examination unit coupled to one side of the welding unit to examine whether the junction part is defective; anda machining unit coupled to the top of the welding unit to remove the surface of a welded portion of the junction part and/or process the welded portion of the junction part.2. The machining claim 1 , examination claim 1 , and welding integral device for a nozzle of claim 1 , wherein:foreign substance preventing layers are provided on surfaces of the pair of caps facing each other.3. The machining claim 2 , examination claim 2 , and welding integral device for a nozzle of claim 2 , wherein:a support member is provided between the welding unit and the foreign substance preventing layer.4. The machining claim 1 , examination claim 1 , and welding integral device for a nozzle of claim 1 , further comprising:a control unit controlling the welding unit, the machining unit, and the examination unit.5. The ...

Narrow groove welding method and system

A system includes a welding torch assembly configured to establish a welding arc between an electrode and workpieces separated by a narrow groove utilizing power from a power supply while moving the electrode radially in a desired pattern by a motion control assembly within the welding torch assembly. The welding torch assembly includes a nozzle through which the electrode is fed and within which the electrode is radially moved.

Gasless, Mechanized, Field-Welding Of Tubular Structure

A system and method provide gasless, mechanized, field welding of an exterior of a tubular structure such as a pipeline, without the need for an enclosure. An embodiment consolidates some of the welding equipment on a skid for ease of transport to and from a remote worksite. The gasless weld may be achieved despite the presence of wind, by precisely controlling an arc voltage as disclosed. The footprint and weight of the system may be minimized, along with the associated labor, expense, and environmental impact otherwise incurred by conventional welding techniques using enclosures.

PULSE ARC WELDING PROFILE CONTROL METHOD, CONTROL DEVICE, WELDING SYSTEM, WELDING PROGRAM, AND WELDING POWER SUPPLY

A pulse arc welding profile control method, a control device, a welding system, a welding program, and a welding power supply are provided in which, even when a pulse arc welding method is used, protruding change information is extractable at high accuracy without influence from a welding current or an arc voltage having a pulse shape. An electric change amount detected at the time of weaving includes, as a parameter, at least one among a welding current detection signal and an arc voltage detection signal, takes a predetermined period as one period, calculates an average value of the electric change amount in each one period, and extracts, on the basis of the average value, the protruding change information in a groove to follow a welding line. 112-. (canceled)13. A pulse arc welding profile control method in pulse arc welding to perform welding by periodically changing a welding current and an arc voltage , the method comprising:weaving a welding torch in a groove;detecting an electric change amount at a time of the weaving;calculating an average value of the electric change amount for every one interval, the one interval being a predetermined period;extracting information on protruding change in the groove based on the average value; andfollowing the welding line based on the information on protruding change, whereinthe electric change amount includes, as a parameter, at least one of a welding current detection signal and an arc voltage detection signal.14. The pulse arc welding profile control method according to claim 13 , wherein the predetermined period is one cycle of pulse or multiple cycles of pulse of the electric change amount.15. The pulse arc welding profile control method according to claim 13 , wherein the electric change amount includes claim 13 , as a parameter claim 13 , a ratio of the arc voltage detection signal to the welding current detection signal claim 13 , or a ratio of the welding current detection signal to the arc voltage detection ...

Gasless, Mechanized, Field-Welding Of Tubular Structure

A system and method provide gasless, mechanized, field welding of an exterior of a tubular structure such as a pipeline, without the need for an enclosure. An embodiment consolidates some of the welding equipment on a skid for ease of transport to and from a remote worksite. The gasless weld may be achieved despite the presence of wind, by precisely controlling an arc voltage as disclosed. The footprint and weight of the system may be minimized, along with the associated labor, expense, and environmental impact otherwise incurred by conventional welding techniques using enclosures. 1. A system for welding a tubular workpiece , the system comprising:a plurality of welding equipment for transportation to a work site, the welding equipment including a welding machine for generating a controlled voltage, a power supply for powering the welding machine, and a boom including a lifting arm;a helper station secured to the lifting arm, positionable to orient the helper station with respect to the tubular workpiece to be welded;a wire feeder carried on the helper station, the wire feeder configured for feeding a consumable welding wire;a gasless torch in electrical communication with the welding machine and configured for receiving the consumable welding wire from the wire feeder and generating an electrical arc between the consumable welding wire and the tubular workpiece;a guide track positionable about the tubular workpiece; anda mechanized carrier moveably secured to the guide track and moveable along the guide track while holding the gasless torch adjacent to the tubular workpiece.2. The system of claim 1 , further comprising:a coaxial voltage cable comprising an inner wire disposed within an outer wire separated by an insulating layer, the coaxial cable supplying the controlled voltage from the welding machine to the gasless torch.3. The system of claim 1 , further comprising:a voltage sensor included on the gasless torch for sensing an arc voltage at the tubular ...

SHAFT ELEMENT, METHOD FOR PRODUCING A SHAFT ELEMENT COMPOSED OF TWO DIFFERENT MATERIALS, AND CORRESPONDING TURBOMACHINE

A shaft element of a turbomachine, in particular of a combined steam turbine, having at least two shaft subsegments integrally joined to each other by means of a weld, wherein different chemical and mechanical properties are inherent to the shaft subsegments, wherein the weld has a ratio of welding layer height to weld width of 1:14 to 1:2. A method produces a shaft element composed of two different materials having at least two shaft subsegments integrally joined to each other by means of a weld. 1. A shaft element of a turbomachine or of a combined steam turbine , comprising:at least two shaft sub-portions that are joined together in a materially integral manner by means of a weld seam, in the case of which dissimilar chemical and mechanical properties are inherent to these shaft sub-portions,wherein the weld seam has a weld pass height/weld seam width ratio of 1:14 to 1:2,wherein the first of the at least two shaft sub-portions is produced from a heat-resistant material 1CrMoV, 2CrMoV, 2CrMoNiWV, 10CrMoWVNbN, 10CrMoVNbN, 9CrMoCoBNbN, or 9Cr3Co3WNbBN.2. The shaft element as claimed in claim 1 ,wherein the weld seam comprises a plurality of weld passes which in each case are generated by a single weld bead, so as to achieve a weld-pass heat treatment, or an intermediate-pass heat treatment, of the respective weld pass that lies therebelow, by way of the adjusted geometry of the respective weld bead.3. The shaft element as claimed claim 1 ,wherein the weld seam comprises two axially opposite steep joint flanks which in each case in relation to a vertical have an opening angle of <1.5°, so as to positively control a penetration of an input of thermal energy.4. The shaft element as claimed in claim 1 ,wherein the further of the at least two shaft sub-portions is produced from a tough-at-cold-temperature material 2.0-4.0NiCrMoV, 2.0-4.0NiCrMoV Super Clean, or 2CrNiMo.5. The shaft element as claimed in claim 1 ,wherein the further of the at least two shaft sub-portions ...

System and method for manufacturing pipes

An improved approach for welding a pipe, the pipe comprising first and second tubular sections welded to each other along a welding groove having an open-ended profile which is circumferentially extended around a pipe axis. The welding groove is formed between first and second axial edges and includes a root formed at a radially inner end of the welding groove and a portion of the welding groove radially outward relative to a root. The root axially spaces the first tubular section apart from the second tubular section substantially between 1 mm and 6 mm and the first and second axial edges are angled substantially between 6-20° (or 6-30°) away from each other radially outwardly to form the portion. The root can receive a first welding bead to fill the root and create a joint between the first and second tubular sections and additional welding beads may be utilized.

METHOD FOR PRODUCING A MULTI-LAYER LARGE PIPE

A method for producing a multilayer large pipe having an outer support layer and at least one inner liner layer. Advantages with regard to productivity and the properties of the multilayer large pipe are achieved by the sequence of method steps wherein production of a support sheet is pre-bent to a predetermined initial bending radius for the support layer and at least one liner sheet is pre-bent to a predetermined initial bending radius for the liner layer, placement of the at least one pre-bent liner sheet against the inside of the pre-bent support sheet, with a positioning and parallel alignment of its longitudinal edges extending in the direction of the bending axis in order to form the support layer and the at least one liner layer, there is integral joining of at least one of two longitudinal edges of the at least one liner sheet to the support sheet, shaping of the composite of the integrally joined support layer and at least one liner layer to form a slit multilayer large pipe by a bending machine, with nonpositive, frictional engagement in liner regions that are not integrally joined, and there is closing of the remaining gap of the slit multilayer large pipe with a longitudinal seam by welding. 112. A method for producing a multilayer large pipe having an outer support layer () and at least one inner liner layer () , including the sequence of method steps:{'sub': B0', 'A0, 'b': 1', '2, 'producing a support sheet pre-bent to a predetermined initial bending radius (R) for the outer support layer () and at least one liner sheet pre-bent to a predetermined initial bending radius (R) for the liner layer ();'}{'b': 1', '2, 'placing the at least one pre-bent liner sheet against the inside of the pre-bent support sheet, with a positioning and parallel alignment of longitudinal edges extending in a direction of the bending axis to form the outer support layer () and the at least one liner layer ();'}{'b': 3', '3', '3', '3, 'i': a,', 'b,', 'c,', 'd, 'integrally ...

Cylinder Welding System

A cylinder welding system includes a welder that has a control unit, a welding head and a wire feed. Each of the wire feed and the welding head is electrically coupled to the control unit. A cart is provided and the cart is rollably positioned within a cylinder. A rotation unit is rotatably coupled to the cart and the rotation unit engages an inside surface of the cylinder. The rotation unit is electrically coupled to the control unit such that the control unit controls operational parameters of the rotation unit. In this way the rotation unit is actuated to rotate along the inside surface of the cylinder. The welding head is coupled to the rotation unit to weld the inside of the cylinder when the rotation unit rotates along the inside of the cylinder. In this way one cylinder may be automatically welded to another cylinder. 1. A cylinder welding system being configured to be positioned within a cylinder thereby facilitating a plurality of cylinders to be welded together , said system comprising:a welder having a control unit, a welding head and a wire feed, each of said wire feed and said welding head being electrically coupled to said control unit;a cart being configured to be rollably positioned within a cylinder; anda rotation unit being rotatably coupled to said cart wherein said rotation unit is configured to engage the inside of the cylinder, said rotation unit being electrically coupled to said control unit such that said control unit controls operational parameters of said rotation unit wherein said rotation unit is configured to rotate along the inside of the cylinder, said welding head being coupled to said rotation unit wherein said welding head is configured to weld the inside of the cylinder when said rotation unit rotates along the inside of the cylinder thereby facilitating one cylinder to be welded to another cylinder.2. The system according to claim 1 , wherein said cart comprises a base having a top side and a peripheral surface claim 1 , said ...

ARC WELDING CONTROL METHOD

In thin sheet welding, when a heat input amount relative to a sheet thickness is too large, a welding defect such as a deviation from aim due to occurrence of a strain or burn through may easily occur. When a welding current is decreased to reduce the heat input amount, there is an issue in which an arc tends to become unstable. In arc welding in which short-circuit and arcing are repeated, first heat input period (Th) and second heat input period (Tc) having a heat input amount less than that of first heat input period (Th) are periodically repeated and a welding current during an arc period in second heat input period (Tc) is decreased to extinguish the arc. This reduces the heat input amount into a welding object and suppresses burn through or a strain upon welding, while making the arc stable. 1. An arc welding control method of performing arc welding in which a welding wire that is a consumable electrode is fed by alternately repeating forward feeding that feeds the welding wire toward a welding subject and reverse feeding that feeds the welding wire in a direction opposite to the forward feeding at a predetermined period and amplitude in a periodical manner , and a first heat input period having a first heat input amount and a second heat input period having a second heat input amount that is less than the first heat input amount are periodically repeated ,wherein each of the first heat input period and the second heat input period includes a short-circuit period and an arc period, and when release of short-circuit of the welding wire is detected during the short-circuit period in the second heat input period, an arc is extinguished.2. The arc welding control method according to claim 1 , wherein a welding current during the arc period in the second heat input period is decreased so as to be less than a welding current during the arc period in the first heat input period so that the arc is extinguished.3. The arc welding control method according to claim 2 , ...

METHOD AND SYSTEM FOR WELDING CONDUITS

A method for welding two or more conduits includes aligning end portions thereof in an abutting relationship to define a gap. The method includes performing a spatter free root weld along the gap to configure a root layer while the inner circumferential surface side is unobstructed. After the root weld is complete, an outward thrust is applied along the inner circumferential surfaces of the conduits. During the application of the outward thrust, a filler weld is performed along the gap to fill the gap and to facilitate shrinkage of the filler and root weld materials longitudinally and radially outward while preventing pressing out of the filler and root weld materials radially inward of the inner circumferential surface. 1. A method for welding two or more conduit members , the method comprising:aligning two or more end portions of the two or more conduit members in an abutting relationship to define a gap, the conduit members having an outer circumferential surface side and an inner circumferential surface side;having the inner circumferential surface side unobstructed;performing a root weld along the gap from the outer circumferential surface side to configure a root layer while the inner circumferential surface side is unobstructed, the root weld being performed in a manner that prevents spattering of the root weld material along the inner circumferential surface side;after the root weld is complete, applying an outward thrust along the inner circumferential surface side; andduring application of the outward thrust, performing a filler weld along the gap from the outer circumferential surface side thereof to fill the gap so as to facilitate shrinkage of the filler and root weld materials longitudinally and radially outwardly while preventing pressing out of the filler and root weld materials radially inwardly of the inner circumferential surface side.2. The method for welding the two or more conduit members as claimed in claim 1 , further comprising preparing ...

Field Girth Welding Technology for High Manganese Steel Slurry Pipelines

Welding compositions for high manganese steel base metals, the composition comprising: carbon in a range of about 0.4 wt % to about 0.8 wt %; manganese in a range of about 18 wt % to about 24 wt %; chromium in an amount of about 6 wt %; molybdenum in an amount of about <4 wt %; nickel in an amount of about <5 wt %; silicon in an amount of about 0.4 wt % to about 1.0 wt %; sulfur in an amount of about <200 ppm; phosphorus in an amount of about <200 ppm; and the balance comprising iron.

VEHICLE FLOOR

Embodiments disclosed herein relate to a vehicle floor for a vehicle having a length and a width. The vehicle floor comprises a number of sheets of material having a length equal to the length of the vehicle. A joint couples the number of sheets to form a width equal to the width of the vehicle. Also, a method of constructing a vehicle is provided. A length and a width of the vehicle are determined. Material is cut into a first sheet and a second sheet both equal to the length of the vehicle. A joint couples the first sheet and the second sheet to form the width of the vehicle. 1. A vehicle floor for a vehicle having a length and a width , the vehicle floor comprising:a number of sheets of material having a length equal to the length of the vehicle; anda joint coupling the number of sheets to form a width equal to the width of the vehicle.2. A vehicle floor as defined in wherein the number of sheets is two (2).3. A vehicle floor as defined in wherein the material is steel.4. A vehicle floor as defined in wherein the vehicle is a school bus.5. A vehicle floor as defined in wherein the joint is formed by seam welding.6. A vehicle floor as defined in wherein the joint complies with 49 CFR § 571.221. This disclosure relates generally to a vehicle floor and a method of constructing a vehicle floor. More specifically, this disclosure relates to a floor for a school bus and to a method of constructing a school bus.Some currently available vehicles include a floor comprising a plurality of pieces of material typically cut into sheets having a width substantially equal to a width of a vehicle. For instance, as shown in , some currently available school buses comprise a plurality of sheets of material, often steel and the like, substantially equal to a width of the school bus. Because a school bus has a length often larger than its width, a plurality of such sheets are assembled together substantially perpendicularly to a longitudinal axis of the school bus. Each pair of the ...

METHOD FOR WELDING OF INSULATED PIPE

A welding method, to reduce tension due to pipe stretching, for a downhole double-walled insulated pipe is disclosed. The pipe comprises an inner tube, an outer tube, steel spacer rings and insulated material fitted filling the annular space. Special welding links the ends of inner and outer tubes, forming a flexible metallic joint, achieved through the use of filler metal with specific chemical composition during the welding process. The inner tube is heated and extended before the tube welding is performed. The welded joint is strong enough to keep the inner tube in place when it cools down, creating a tension inwards in the tube. This way, when steam flows through the tubing during the operation, the heat stretches the inner tube until the tension direction is outwards, then the tension now becomes about half of the normal tension applied to the tube welded joint with the usual welding process. 116-. (canceled)17. An assembly for joining metal tubes to form a double-walled pipe having an outer tube , an inner tube of smaller diameter than the outer tube , and an annulus between the tubes , the assembly comprising:a) a first non-threaded steel tube serving as the outer tube;b) a second non-threaded steel tube serving as the inner tube, dimensioned with a diameter and length so as to fit entirely within the outer tube, and wherein the inner tube is positioned within the outer tube creating an annular space between the tubes;{'b': '10', 'c) a plurality of metal laser-cut spacer rings located in the annular space, each ring comprising two semi-circular pieces and having an inner diameter equal to an outer diameter of the inner tube and a chamfer () on both edges, in a manner to allow the ring and the inner tube to be arc welded together, with rings equidistant spaced 1.5 meters from each other, keeping the inner tube and the outer tube concentric;'}{'b': '5', 'd) a welding material for joining ends of the inner tube and the outer tube, using a deflection ring () to ...

Weld Joints Involving Dissimilar Metals and Methods for Forming Same

A method of joining a steel first member to a stainless steel second member includes buttering a first joint surface on the first member, the buttering including: preheating the first joint surface; welding a border layer of weld material to the first joint surface; and heat treating the border layer and the first joint surface after welding the border layer. A weld is formed between the first and second members after heat treating the border layer and the first joint surface. The border layer and a second joint surface on the second member are preheated; and a body of weld material is added between the border layer and the second joint surface.

ORBITAL WELDING DEVICE WITH IMPROVED SECURITY AND REDUCED FAILURE PROBABILITY

An orbital welding device () having a welding head (), the welding head having a tubular mount () and a welding electrode holder () rotatably supported with respect to the tubular mount (), the orbital welding device () having an electric motor () activated by a motor controller () of the orbital welding device (), which is configured to drive the welding electrode holder () and thus to rotate the same with respect to the tubular mount (), wherein the orbital welding device () has an electric torque measuring device (), which is configured to measure a torque applied by the motor () to the welding electrode holder (), wherein the torque measuring device () is connected to the motor controller (), and wherein the motor controller () is configured to stop the motor () automatically if the torque exceeds a predetermined first torque. 112343165143. An orbital welding device () having a welding head () , the welding head having a tubular mount () and a welding electrode holder () rotatably supported with respect to the tubular mount () , the orbital welding device () having an electric motor () activated by a motor controller () of the orbital welding device () , which is configured to drive the welding electrode holder () and thus to rotate the same with respect to the tubular mount () ,wherein{'b': 1', '7', '6', '4', '7', '5', '5', '6, 'the orbital welding device () has an electric torque measuring device (), which is configured to measure a torque applied by the motor () to the welding electrode holder (), wherein the torque measuring device () is connected to the motor controller (), and wherein the motor controller () is configured to stop the motor () automatically if the torque exceeds a predetermined first torque.'}217716. The orbital welding device () as claimed in claim 1 , wherein the torque measuring device () has a current measuring device (.) claim 1 , which is configured to measure an electric motor current for driving the motor () as a value representing ...

METHOD FOR WELDING STEEL PIPE IN STEEL PIPE STRUCTURE AND JOINT

A method for welding a steel pipe in a steel pipe structure and a joint is provided. The welding method includes: a measurement step of measuring a manufacturing error of the steel pipe, a calculation step of calculating the positions of the steel pipe and the joint where the manufacturing error measured in the measurement step is absorbed, and a welding step of welding the steel pipe and the joint at the positions of the steel pipe and the joint, the positions being calculated in the calculation step. 1. A method for welding a steel pipe in a steel pipe structure and a joint ,the method comprising:a measurement step of measuring a manufacturing error of the steel pipe in the steel pipe structure;a calculation step of calculating positions of the steel pipe and the joint where the manufacturing error measured in the measurement step is absorbed; anda welding step of welding the steel pipe and the joint at the positions of the steel pipe and the joint, the positions being calculated in the calculation step.2. The method for welding a steel pipe in a steel pipe structure and a joint according to claim 1 , wherein the calculated positions of the steel pipe and the joint in the calculation step are a predetermined angle for inclining the joint from a design position and an insertion amount of the steel pipe into the joint inclined at the predetermined angle.3. The method for welding a steel pipe in a steel pipe structure and a joint according to claim 2 , wherein the predetermined angle is calculated based on a manufacturing error in a direction perpendicular to an axis of the steel pipe at the design position.4. The method for welding a steel pipe in a steel pipe structure and a joint according to claim 2 , wherein the insertion amount of the steel pipe into the joint inclined at the predetermined angle is calculated based on the predetermined angle claim 2 , a manufacturing error in a direction perpendicular to an axis of the steel pipe at the design position claim 2 ...

JOINING STRUCTURE AND JOINING METHOD

A second member has a through-portion penetrating toward a first member. An overlapped surface of the second member with the first member includes a recess. The recess is recessed so as to surround an entire periphery of the through-portion. A sealing material is injected into the recess from an injection hole to close a gap between overlapped surfaces of the first member and the second member. 1. A joint structure including a first member made of a metal material , a second member made of a material that is difficult to be welded to the first member , and a third member made of a filler material and welded to the first member , the first member , the second member , and the third member being joined together ,the second member including a through-portion penetrating toward the first member,the third member being welded to the first member through the through-portion,at least one of overlapped surfaces of the first member and the second member including a recess formed into a space separate from the through-portion, the recess being recessed so as to surround an entire periphery of the through-portion,the recess being formed into a space separate from a welded part that is a welding site where the first member and the third member are welded together, the recess being recessed so as to surround an entire periphery of the welded part,at least one of the first member or the second member including an injection hole communicating with the recess, andthe recess being provided with a sealing material injected from the injection hole, the sealing material closing a gap between the overlapped surfaces of the first member and the second member.2. The joint structure of claim 1 , whereinthe injection hole includes a plurality of injection holes, the injection holes being disposed along the recess.3. The joint structure of claim 1 , whereinthe recess has a width larger than a diameter of the injection hole.4. The joint structure of claim 1 , whereinthe recess is formed in the ...

Method of Manufacturing Metal Containers

A method of manufacturing a container includes positioning metals plates against one another to define an interior space, filling the interior space with a granular refractory material and welding the seams between the plates to form a fluid tight container. 1. A method of manufacturing a container which comprisespositioning metal plates against one another to define an interior space; filling the interior space with a granular refractory material to prevent at least one of weld spatter from adhering to the interior of the container and to prevent burr from being created at the seams; andwelding the seams between the plates.2. A method as claimed in claim 1 , wherein granular refractory material comprises granules of crushed rock.3. A method as claimed in claim 2 , wherein the granules are rounded.4. A method as claimed in claim 2 , wherein the granules are angular.5. A method as claimed in claim 1 , wherein the granules having a diameter in the range from 3 mm to 4 mm.6. A method as claimed in any preceding claim 1 , wherein the refractory material is marble.7. A method as claimed in claim 1 , wherein the metal of which the plates are made is steel.8. A method as claimed in claim 1 , wherein the welding of the seams is performed by arc welding.9. A method as claimed in claim 1 , wherein the welding of the seams is performed using oxy-acetylene welding.10. A method as claimed in claim 1 , wherein the plates form a fluid tight container.11. A method as claimed in claim 1 , wherein the container is re-oriented during welding such that the granular refractory material contacts the seams. This application is the U.S. National Stage filing of International Application Serial No. PCT/EP2014/061716 filed on Jun. 5, 2014 which claims priority to Italian Application MO2013A000166 filed Jun. 7, 2013, each of which is incorporated herein by reference in its entirety.The present invention relates to a method of manufacturing metal containers.It is known to manufacture metal ...

JOINT STRUCTURE

A joint structure includes a first metallic material having a first projection, a second metallic material similar in type to the first metallic material and weldable to the first metallic material, and a different type of material having a first penetrating part and sandwiched between the first metallic material and the second metallic material, the different type of material being different in type from the first metallic material and the second metallic material and difficult to be welded to the first metallic material and the second metallic material. The first projection is smaller in diameter or width than the first penetrating part and is spaced from the rim of the first penetrating part by a first gap. The first projection is positioned in the first penetrating part and is spaced from the second metallic material by a second gap in the thickness direction of the first penetrating part. The second gap has a size of a predetermined percentage of the thickness of the first projection of the first metallic material to which arc welding id applied. The first metallic material and the second metallic material are melted and joined together inside the first penetrating part to compress and fix the different type of material, so that the different type of material, the first metallic material, and the second metallic material are fixed together. 1. A joint structure comprising:a first metallic material having a first projection;a second metallic material similar in type to the first metallic material and weldable to the first metallic material; anda different type of material different in type from the first metallic material and the second metallic material, the different type of material having a first penetrating part and sandwiched between the first metallic material and the second metallic material, the different type of material being difficult to be welded to the first metallic material and the second metallic material,whereinthe first projection is smaller ...

Metal Carbide/Nitride Precipitation Control in Fusion Welding

Properties and performance of weld material between metals in a weldment is controlled by modifying one or more of the nitrogen content and the carbon content to produce carbide (e.g. MC-type), nitride and/or complex carbide/nitride (e.g. MX-type) type precipitates. Fusion welding includes (i) adjusting shield gas composition to increase nitrogen/carbon gas and nitride/carbide species, (ii) adjusting composition of nitrogen/carbon in materials that participate in molten welding processes, (iii) direct addition of nitrides/carbides (e.g. powder form), controlled addition of nitride/carbide forming elements (e.g. Ti, Al), or addition of elements that increase/impede solubility of nitrogen/carbon or nitride/carbide promoting elements (e.g. Mn), and (iv) other processes, such as use of fluxes and additive materials. Weld materials have improved resistance to different cracking mechanisms (e.g., hot cracking mechanisms and solid state cracking mechanisms) and improved tensile related mechanical properties. 18-. (canceled)9. A method of fusion welding , comprising:forming a region of molten material between a first metallic body and a second metallic body, wherein the molten material includes molten base metal from the first metallic body, molten base metal from the second metallic body, weld metal from a welding alloy, and, optionally, one or more molten additive material;modifying at least one of a nitrogen content of the molten material and a nitride content of the molten material;coalescing the molten material; andsolidifying the molten material to form a weld material,wherein the weld material joins the first metallic body to the second metallic body to form a weldment, andwherein the solidified weld material has a composition including 15 ppm to 120 ppm or 200 ppm to 1500 ppm nitrogen.10. The method of claim 9 , wherein a microstructure of the solidified weld material includes a plurality of precipitates claim 9 , wherein the plurality of precipitates include one or ...

FLEXIBLE ASSEMBLY LINE AND METHOD

A flexible assembly line includes a common welding station having a first set of tooling adapted to engage and support a first type of vehicle frame and a second set of tooling adapted to engage and support a second type of vehicle frame. The first set of tooling is provided on a first side of a rotatable unit and the second set of tooling is provided on a second side of the rotatable unit such that the rotatable unit is rotatable to present either the first set of tooling or the second set of tooling for a welding operation. The flexible assembly includes a first dedicated welding station having dedicated tooling particularly adapted to engage and support only the first type of vehicle frame. The flexible assembly includes a second dedicated welding station having dedicated tooling particularly adapted to engage and support only the second type of vehicle frame. 1. A flexible assembly line comprising: a first set of tooling adapted to engage and support a first type of vehicle frame, and', 'a second set of tooling adapted to engage and support a second type of vehicle frame, a base geometry of which is not common with the first type, wherein the first set of tooling is provided on a first side of a rotatable unit and the second set of tooling is provided on a second side of the rotatable unit such that the rotatable unit is rotatable about a pivot axis to present either the first set of tooling or the second set of tooling for a welding operation;, 'a common welding station including'}a first dedicated welding station having dedicated tooling particularly adapted to engage and support only the first type of vehicle frame; anda second dedicated welding station having dedicated tooling particularly adapted to engage and support only the second type of vehicle frame.2. The flexible assembly line of claim 1 , further comprising at least one welding robot positioned adjacent both the first and second dedicated welding stations and operable to perform primary attachment ...

Systems and methods providing dynamic bead spacing and weave fill in additive manufacturing

Embodiments of systems and methods of additive manufacturing are disclosed. In one embodiment, a computer control apparatus accesses multiple planned build patterns corresponding to multiple build layers of a three-dimensional (3D) part to be additively manufactured. A metal deposition apparatus deposits metal material to form at least a portion of a build layer of the 3D part. The metal material is deposited as a beaded weave pattern, based on a planned path of a planned build pattern, under control of the computer control apparatus. A weave width, a weave frequency, and a weave dwell of the beaded weave pattern may be dynamically adjusted during deposition of the beaded weave pattern. The adjustments are under control of the computer control apparatus based on the planned build pattern, as a width of the build layer varies along a length dimension of the build layer.

A METHOD FOR THE MANUFACTURE OF AN ASSEMBLY BY SUBMERGED ARC WELDING (SAW)

A pre-coated steel substrate wherein the coating including at least one titanate and at least one nanoparticle; a method for the manufacture of an assembly; a method for the manufacture of a coated steel substrate and a coated substrate substrate. It is particularly well suited for construction, shipbuilding and offshore industries. 126-. (canceled)27. A pre-coated steel substrate comprising:a steel substrate; anda pre-coating coating the steel substrate and including at least one titanate and at least one nanoparticle.28. The pre-coated steel substrate as recited in wherein the at least one titanate is selected from the group consisting of: NaTiO claim 27 , NaTiO claim 27 , KTiO claim 27 , KTiOMgTiO claim 27 , SrTiO claim 27 , BaTiO claim 27 , and CaTiO claim 27 , FeTiO claim 27 , ZnTiOand mixtures thereof.29. The pre-coated steel substrate as recited in wherein the at least one nanoparticle is selected from the group consisting of TiO claim 27 , SiO claim 27 , Yttria-stabilized zirconia (YSZ) claim 27 , AlO claim 27 , MoO claim 27 , CrO claim 27 , CeOand mixtures thereof.30. The pre-coated steel substrate as recited in wherein a thickness of the pre-coating is between 10 to 140 μm.31. The pre-coated steel substrate as recited in wherein a percentage of the at least one nanoparticle is below or equal to 80 wt. %.32. The pre-coated steel substrate as recited in wherein a percentage of the at least one titanate is above or equal to 45 wt. %.33. The pre-coated steel substrate as recited in wherein the pre-coating further includes a binder.34. The pre-coated steel substrate as recited in wherein a percentage of the binder in the pre-coating is between 1 and 20 wt. %.35. The pre-coated steel substrate as recited in wherein the pre-coated steel substrate is at least locally covered by a shielding flux.36. The pre-coated steel substrate as recited in further comprising an anticorrosion coating.37. The pre-coated steel substrate as recited in wherein the anti-corrosion ...

ROBOTIC WELDING SYSTEM

A robotic welding system comprises a supporting arm for attaching to a repositionable support structure, the supporting arm comprising a first mounting portion connectable to the repositionable support structure, and a second mounting portion rotatably coupled to the first mounting portion. A yaw rotary actuator rotates the second mounting portion about a yaw axis. A welding arm comprises a third mounting portion rotatably coupled to the second mounting portion of the supporting arm. A pitch rotary actuator rotates the third mounting portion about a pitch axis generally perpendicular to the yaw axis. A roll rotary actuator rotates a torch holder shaft about a roll axis generally perpendicular to the pitch axis. The shaft has a torch mounting portion for mounting a welding torch at an end thereof. A controller is operably coupled to the actuators to cause the welding torch to execute a welding pattern. 116-. (canceled)17. A welding apparatus comprising: 'a mounting pivoting joint on a moveable support, the mounting pivoting joint configured to provide an overhead mounting point at any desired position within a work area; and,', 'a repositionable support structure comprising a supporting arm attached to an underside of the mounting pivoting joint, the supporting arm comprising a first mounting portion and a second mounting portion rotatably coupled to the first mounting portion, the supporting arm extending downwardly from the first mounting portion to the second mounting portion;', 'a yaw rotary actuator operably connected to the first mounting portion and the second mounting portion and configured to rotate the second mounting portion in relation to the first mounting portion about a yaw axis;', 'a welding arm comprising a third mounting portion rotatably coupled to the second mounting portion of the supporting arm, the welding arm extending toward a welding side of the supporting arm;', 'a pitch rotary actuator connected between the second mounting portion of the ...

HORIZONTAL FILLET WELDING METHOD, HORIZONTAL FILLET WELDING SYSTEM, AND PROGRAM

A welding system that, using a junction at which a standing plate and a bottom plate meet as a welding line, makes an electrode weave centered on the welding line and thereby welds along the welding line. While weaving, the electrode moves forward in a welding advancement direction until a bottom-plate-side weaving edge. When the electrode arrives at the bottom-plate-side weaving edge, the electrode moves backward with respect to the welding advancement direction until a standing-plate-side weaving edge. The electrode repeats this weaving motion on the bottom-plate side and on the standing-plate side. The system can suppress occurrence of inferior bead appearance and of welding defects in horizontal fillet welding. 1. A horizontal fillet welding method for performing welding along a welding line by using a junction at which a standing plate and a bottom plate meet as the welding line and causing an electrode to perform a weaving operation with reference to the welding line as a center , wherein the weaving operation includes moving the electrode forward in a welding travel direction to a bottom-plate-side weaving edge and moving the electrode rearward against the welding travel direction to a standing-plate-side weaving edge when the electrode reaches the bottom-plate-side weaving edge , the weaving operation being repeated at the bottom plate side and the standing plate side.2. The horizontal fillet welding method according to claim 1 , wherein when the electrode is moved forward in the welding travel direction to the bottom-plate-side weaving edge in the weaving operation claim 1 , a bottom-plate-side movement angle β (degrees) claim 1 , which is an angle formed between a trajectory of the electrode and an opposite direction from the welding travel direction claim 1 , is between 185 degrees and 250 degrees inclusive claim 1 , wherein when the electrode is moved rearward against the welding travel direction to the standing-plate-side weaving edge claim 1 , a ...

METHOD FOR WELDING DISSIMILAR METALS

A method for welding dissimilar metals is provided. A first metal workpiece and a second metal workpiece having different physical characteristics are provided. A surface of the first metal workpiece and a surface of the second metal workpiece are abutted to form a pre joint surface between the first metal workpiece and the second metal workpiece. The first metal workpiece and the second metal workpiece are welded with a welding apparatus moving substantially along an axis, wherein the axis is offset from the pre-joint surface and proximal to the first metal workpiece than to the second metal workpiece. 1. A method for welding dissimilar metals , comprising:providing a first metal workpiece and a second metal workpiece having different physical characteristics;abutting a surface of the first metal workpiece and a surface of the second metal workpiece to form a pre-joint surface between the first metal workpiece and the second metal workpiece; andwelding the first metal workpiece and the second metal workpiece with a welding apparatus moving substantially along an axis, wherein the axis is offset from the pre joint surface and proximal to the first metal workpiece than to the second metal workpiece.2. The method of claim 1 , wherein the first metal workpiece has a first coefficient of thermal conductivity claim 1 , and the second metal workpiece has a second coefficient of thermal conductivity lower than the first coefficient of thermal conductivity;3. The method of claim 1 , wherein the welding apparatus comprises an arc welding apparatus.4. The method of claim 3 , wherein the arc welding apparatus comprises a gas tungsten arc welding (GTAW) apparatus.5. The method of claim 1 , wherein the axis is substantially in parallel with the pre joint surface.6. The method of claim 1 , wherein the pre joint surface is a planar surface.7. The method of claim 1 , wherein the pre-joint surface has a ring shape.8. The method of claim 1 , wherein the first metal workpiece and the ...

SELF-POWERED WELDING SYSTEMS AND METHODS

A weld system for welding two pipes includes a frame, a plurality of rollers, a drive motor, a brake system, an inspection detector, a weld torch, one or more battery cells and one or more processors. The frame is configured to be placed within the pipes. The plurality of rollers is configured to rotatably support the frame. The drive motor drives the rollers to move the frame within the pipes. The brake system secures the frame from movement at a desired location within the pipes. The weld torch, the inspection detector and the one or more battery cells are carried by the frame. The inspection detector is configured to detect a characteristic of an interface region between the pipes. The one or more battery cells are configured to power the drive motor, the inspection detector and the weld torch. 1137.-. (canceled)138. The weld system according to claim 143 , further comprising a motor power source carried by the frame claim 143 , wherein the motor power source is configured to power the drive motor.139. The weld system according to claim 143 , further comprising a torch power source carried by the frame claim 143 , wherein the torch power source is configured to power the torch.140. The weld system according to claim 138 , wherein the motor power source comprises a battery.141. The weld system according to claim 139 , wherein the torch power source comprises a battery.142. The weld system according to claim 143 , further comprising a sensor that senses an end of the pipe.143. A weld system for welding two pipes claim 143 , comprising:a frame configured to be placed within the pipes;a plurality of rollers configured to rotatably support the frame;a drive motor that drives the plurality of rollers to move the frame within the pipes;a brake system that secures the frame from movement at a desired location within the pipes;an inspection detector carried by the frame, the inspection detector being configured to detect a characteristic of an interface region between the ...

Mounting attachment, use and method of manufacture

A mounting attachment with a connection area for a gas line includes a first cylindrical fastening medium and a second cylindrical fastening medium, which are in particular screwable into each other. The first fastening medium and/or the second fastening medium are prepared in a 3D-plastic printing process. A pipe to be welded is inserted into the first cylindrical fastening medium by means of an essentially central lead trough in the first cylindrical fastening medium, with a cylindrical area of insertion for the pipe to be welded in the second fastening medium. The area of application includes an attachment ring area and a connection area for a gas feed hole for feeding forming gas to a gas-use point by means of a forming gas pipe in the pipe to be welded. The pipe used is sealed against the cylindrical fastening media by one or more flexible seals. 110.-. (canceled)11123. A mounting attachment () with a connection area () for a forming gas line () ,comprising{'b': '4', 'a first cylindrical fastening medium () and'}{'b': '5', 'a second cylindrical fastening medium (), which are screwable into each other,'}{'b': 4', '5', '7', '4', '6', '4', '8', '7', '5, 'wherein the first fastening medium () and/or the second fastening medium () are adapted prepared in a 3D-plastic printing process, in such a way that a pipe () to be welded is to be inserted into the first cylindrical fastening medium () by an essentially central lead trough () in the first cylindrical fastening medium (), with a cylindrical area of insertion () for the pipe () to be welded in the second fastening medium (),'}{'b': 8', '9', '2', '10', '3', '7, 'where an area of application () includes an attachment ring area () and a connection area () for a gas feed hole () for feeding forming gas to a gas-use point by means of a forming gas pipe () in the pipe to be welded (),'}{'b': 7', '4', '5', '12, 'the pipe () being sealed against the first fastening medium () and the second fastening medium () by one or ...