Устройство для волочения труб с радиальными ультразвуковыми колебаниями

Полезная модель относится к волочению труб с радиальными ультразвуковыми колебаниями. Устройство включает волокодержатель, волоку, установленную в полости волокодержателя, источник радиальных ультразвуковых колебаний, выполненный в виде пьезокерамических преобразователей, и волокодержатель, выполненный в виде диска, имеющего резонансные размеры, на периферии которого смонтированы пьезокерамические преобразователи, а диск подвешен на пружинах с возможностью перемещения при смещении оси волочения трубы. Использование полезной модели позволяет снизить шероховатость поверхности и повысить степень деформации за счет снижения деформирующего усилия.

УСТРОЙСТВО ДЛЯ ВОЛОЧЕНИЯ ТОНКОСТЕННЫХ ТРУБ

Полезная модель относится к обработке металлов давлением, в частности к устройствам для волочения труб и может быть использована для изготовления труб, используемых в качестве оболочек тепловыделяющих элементов ядерных реакторов. Сущность полезной модели заключается в том, что в устройстве для волочения тонкостенных труб, содержащем корпус, с одной стороны которого находится волокодержатель с установленной в нем волокой, расположенный внутри корпуса стержень с жестко закрепленной на нем оправкой с возможностью осевого перемещения относительно волоки, стержень жестко закреплен в торцевой части корпуса со стороны, противоположной волокодержателю, при этом диаметр оправки больше номинального размера внутреннего диаметра готовой трубы на величину равную 1/4÷3/4 симметричного поля допуска по внутреннему диаметру готовой трубы. Реализация полезной модели позволяет повысить качество изготавливаемых труб и снизить брак.

УСТРОЙСТВО ДЛЯ ВОЛОЧЕНИЯ ДЛИННОМЕРНЫХ ТРУБ С НАРЕЗАМИ

Устройство для волочения длинномерных труб с нарезами, включающее оправку с механизмом осевого перемещения, конусную матрицу, тянущий механизм осевого перемещения заготовки с приводным штоком, несущим захват, отличающееся тем, что оно снабжено контейнером с направляющей заготовку втулкой, и скользящей втулкой, закрепленной у захвата на конце штока.

СПОСОБ ПРОИЗВОДСТВА ТОНКОСТЕННЫХ ТРУБ

Использование: производство тонкостенных труб волочением на оправке через вращающиеся волоки. Сущность изобретения: деформацию полой заготовки ведут на оправке рядом последовательно расположенных вращающихся головок с телами качения с постоянным отношением удельной энергии по очагам деформации, определяемым приведенной в ф-ле зависимостью: 2 ил.

СПОСОБ ВОЛОЧЕНИЯ ТРУБ С ВНУТРЕННЕЙ СТУПЕНЧАТОЙ ПОВЕРХНОСТЬЮ И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

Использование: в волочильном производстве. При волочении устанавливают цилиндрическую заготовку с конической заточкой в передней части в матрицу и протягивают на оправке, формирующей внутреннюю полость. Заходный конус заготовки на 1 - 10o меньше конуса матрицы. Волочение производят с постоянным повышением степени деформации и нагрузки на оправку, установленную с возможностью вращения и самоцентрирования за счет упругости хвостовика. Для реализации способа предложено устройство, в котором имеется привод перемещения матрицы и поршневой механизм осевого перемещения оправки, которая установлена в штоке хвостовиком на подшипниках, подпружиненно и с ограничителем осевого перемещения. 2 с. п. ф-лы, 1 ил.

СПОСОБ ВОЛОЧЕНИЯ ТРУБ

Использование: при волочении труб на закрепленной оправке с обжатием изнутри. Деформацию трубчатой заготовки производят в волоке по диаметру и толщине стенки на закрепленной оправке с обратной конусностью. При этом применяют трубчатую заготовку с внутренним диаметром, большим наружного диаметра оправки, и с предварительно забитой захваткой. Перед обжатием стенки осуществляют редуцирование трубчатой заготовки на размер по внутреннему диаметру меньший, чем внутренний диаметр трубы, на величину, равную удвоенной величине обжатия стенки изнутри. 1 ил.

СПОСОБ ИЗГОТОВЛЕНИЯ КОРПУСОВ СНАРЯДОВ

Изобретение относится к области обработки металлов давлением и может быть использовано на трубопрокатных агрегатах, имеющих в своем составе станы винтовой прокатки и станы горячего волочения или проталкивания, использующих стакановидную заготовку. В предложенном способе используют в качестве исходной заготовки утилизированный корпус снаряда. От его оживальной переменного диаметра части отрезают 20 - 40% длины корпуса. Стакановидную разнотолщинную часть корпуса снаряда нагревают в индукторе в вертикальном положении дном вверх до равномерной температуры. Равномерно нагретый разнотолщинный стакан задают данным концом в валки и осуществляют винтовую деформацию тремя валками на профильной оправке. Затем осуществляют проталкивание на профильной оправке через ряд фильер или обойм. Полученный корпус обладает высокой размерной точностью, поскольку используемый в качестве исходной заготовки утилизированный корпус имеет точные размеры, подвергается равномерному нагреву и винтовой прокатке в трехвалковом ...

СПОСОБ ВОЛОЧЕНИЯ ТРУБ

Способ относится к области обработки металлов давлением и может быть использован при производстве прецизионных труб, например, для цилиндров амортизаторов. Цель - повышение качества труб. Сущность способа состоит в том, что цилиндрической короткой оправке, на которой производится деформация металла, придается винтовое движение. Такое движение позволяет в процессе волочения трубы "обновлять" поверхность оправки относительно волоки и шва трубы, исключая тем самым разогрев и местный износ оправки.

СПОСОБ ИЗГОТОВЛЕНИЯ КОРПУСОВ СНАРЯДОВ

Изобретение относится к области обработки металлов давлением и может быть использовано на трубопрокатных агрегатах, имеющих в своем составе станы винтовой прокатки и станы горячего волочения или проталкивания, использующих стакановидную заготовку. В предложенном способе используют в качестве исходной заготовки утилизированный корпус снаряда. От его оживальной переменного диаметра части отрезают 20 - 40% длины корпуса. Стакановидную разнотолщинную часть корпуса снаряда нагревают в индукторе в вертикальном положении дном вверх до равномерной температуры. Равномерно нагретый разнотолщинный стакан задают данным концом в валки и осуществляют винтовую деформацию тремя валками на профильной оправке. Затем осуществляют проталкивание на профильной оправке через ряд фильер или обойм. Полученный корпус обладает высокой размерной точностью, поскольку используемый в качестве исходной заготовки утилизированный корпус имеет точные размеры, подвергается равномерному нагреву и винтовой прокатке в трехвалковом ...

Способ волочения стальных труб на длинной оправке

Способ изготовления многогранных холоднодеформированных труб

Изобретение относится к области обработки металлов давлением и может быть использовано при производстве холоднодеформированных профильных труб. Цель изобрете1гия - уменьшение разностенности профильных труб. При изготовлении профильных труб с малыми радиусами сопряжения граней заготовку предварительно упрочняют дефорг мацией со степенью 15-30%, а затем деформируют в роликовых калибрах с прямолинейными и выпуклыми сторонами, 1 табл. :л о ...

Устройство для волочения труб на длинной подвижной оправке и последующего извлечения оправки из трубы с наложением ультразвуковых колебаний на инструмент

Способ волочения труб на подвижной оправке при пониженных температурах

Роликовая волока

PIPE ROLLING MILL

Способ изготовления захватки под тянущий механизм для протягивания через волоку труб

Сущность изобретения: введение в передний конец трубной заготовки полого прутка, редуцирование переднего конца до соприкосновения его внутренней поверхности с поверхностью прутка и совместное обжатие переднего конца и прутка до получения диаметра захватки, меньшего диаметра калибрующей части волоки. При этом длина прутка равна длине захватки, а диаметр и толщина соответственно связаны регламентированной зависимостью. 1 ил., 3 табл.

Способ определения профиля обжимной части самоустанавливающейся оправки для волочения труб

Изобретение относится к волочению труб и касается технологического инструмента, а именно оправки. Цель изобретения - повышение точности определения геометрии профиля. Способ включает предварительное безоправочное редуцирование трубной заготовки 1 в волоке 2 с диаметром калибрующего отверстия, равным наружному диаметру готовой трубы. Затем проредуцированную заготовку извлекают из волоки, разрезают вдоль оси симметрии, определяют сечение, в котором внутренний диаметр заготовки равен заданному диаметру калибрующей части оправки, измеряют расстояние от этого сечения до недеформированной части трубной заготовки, разбивают измеренное расстояние на несколько частей с равным шагом δХ, измеряют в каждом сечении приращения наружного диаметра δD толщины стенки δТ проредуцированной заготовки и из соотношений 0,5δDI+1-δТI+1*98дRI+1*98F.δх и RI+1=RI+δRI+1определяют приращение δR радиуса и радиус RIобразующей профиля обжимной части оправки в каждом сечении. 5 ил.

Инструмент для волочения труб

Использование: для производства холодно деформированных труб волочением. Дпя протягивания труб через волоку используют оправку, содержащую свободный цилиндрический , обжимной, переходный и.калибрующий участки. Переходный участок выполнен в форме двух сопряженных меньшими основаниями усеченных конусов. Отношение диаметра меньшего основания к диаметру большего основания, сопряжен-, иого калибрующим участком, составляет 1,01-1,2. Образующая рабочего конуса, сопряженного с обжимным участком, составляет с осью оправки угол больше угла рабочего конуса волоки на 10-30%. Образующая усеченного конуса, сопряженного с калибрующим участком, составляет с осью оправки угол 3-60°. Зил.

Способ изготовления труб

Изобретение относится к обработке металлов давлением и может быть использовано при изготовлении холоднодеформированных труб. Цель изобретения .- повышение производительности и улучшение качества труб с гладкими поверхностями. Деформацию трубы осуществляют в волоке на оправ- ке, причем одному из этих элементов инструмента сообщают вращение. Вращаемый элемент инструмента имеет на своей поверхности винтовые канав- ки. Осевая скорость перемещения винтовых канавок в 2-10 раз превьтает осевую скорость перемещения металла на выходе из волоки. При этом вследствие развития знакопеременной деформации и увеличения доли сжимающих напряжений в очаге деформации повышается пластичность металла и становится возможным изготовление труб при больших разовых обжатиях с гладкой поверхностью. Для предотвращения скручивания трубы на поверхность, контактирующую с неподвижным элементом инструмента, накатывают сетку взаимно перпендикулярных рифлений, наклоненных к оси труби под углом + 40-50°. 5 ил., 1 табл. (Л ...

Способ волочения труб

Изобретение касается обработки металлов давлением и может быть использовано при производстве холодно- деформированных труб. Цель изобретения - обеспечение прямолинейности канала трубы. Способ включает совместное перемещение трубы и оправки с одинаковой скоростью до выхода переднего торца оправки из волоки. Затем скорость оправки снижают на 10-20% по сравнению со скоростью трубы и сохраняют ее постоянной до размещения концевой рабочей части оправки в зоне калибровки волоки. После этого трубу протягивают относительно неподвижно установленной оправки. 1 ил. (О (Л ...

Способ изготовления труб

Изобретение относится к обработке металлов давлением и может быть использовано при производстве труб из нержавеющих сталей волочением на деформирующемся сердечнике. Цель изобретения - улучшение качества труб путем повышения их стойкости к межкристаллитной коррозии. Сердечник перед вводом в трубу подвергают нагреву в обезуглероживающей среде. При последующем волочении труб из нержавеющей стали исключается науглероживание внутренней поверхности труб. 1 табл.

Инструмент для волочения тонкостенных фасонных труб

ИНСТРУМЕНТ-ДЛЯ ВОЛОЧЕНИЯ ТОНКОСТЕННЫХ ФАСОННЫХ ТРУБ, включающий вопоку с цеформируюшвм в калибрующим участками и неподвижную оправку круглого поперечного сеченяя иэ упругого материала, отличающийся тем, что, с цешаю повышения качества .труб, ппсщаць поп ечного сечения которых меньше площади поперечного сечения полости круглой трубной заготовки того же периметра, например крестообразных, оправка выполнена с осевой открытой со стороны переднего конца оправки полостью, имеющей цилиндрический участок равный длине калибрующего участка волоки и сопряженный с ним конический участок длиной равной длине деформирующего участка волоки, причем плсшадь сечения цилиндрического участка полости равна разности площадей , волоки в начале деформирующего и калибрующего участков. (Л ел ;о Ы ...

Инструмент для волочения тонкостенных фасонных труб

Способ изготовления труб с переменным по длине сечением

Способ изготовления винтовых ребер

VERFAHREN ZUM ZIEHEN EINES NAHTLOSEN METALLROHRES

A METHOD AND APPARATUS FOR FORMING INTERNAL HELICAL RIBBING IN A METAL TUBE

... 1,202,491. Drawing. NIPPO KOKAN K.K. 5 March, 1568 [19 March, 1967], No 10598/68. Heading B3P. Internal helical ribbing is formed in a metal tube by drawing a tube 1 between a die 3 and a helical-grooved mandrel 4 to cause relative rotation between the tube and mandrel without the application of an external force. In one embodiment, Fig. 2, the mandrel 4 is connected to a mandrel bar 9 which is secured to a support 10. A clamp 7 and the die 3 are freely rotatable to cause the tube 1 to rotate as it is drawn through the die thereby forming an internal helical rib in the tube. In another embodiment, the die 3 is fixed and the mandrel bar 9 is mounted for free rotation. The mandrel 4 may be in the form of a floating plug (8) (Fig. 3, not shown) which is caused to rotate as the tube is drawn through the die.

Drawbench

... 634,663. Drawing. AETNA-STANDARD ENGINEERING CO. April 1, 1947, No. 8829. Convention date, April 15, 1946. [Class 83 (iv)] A draw-bench has two mandrel assemblies, each of which may comprise one or more mandrels, one assembly being locked in the drawing position whilst the other is in loading position. The transfer from one position to the other is effected without substantial rotation of the mandrel rods about their axes and without much deviation from the horizontal. Means are provided to move the mandrel heads to and from the dies when in operative position. Troughs 35, Figs. 5 and 6, are welded to supports 56 carrying brackets 58, 59 to which rocker arms 64, 65 are pivoted. The arms are keyed to shafts 75, 80 mounted in the main frame and carrying pinions 97, Fig. 11, connected by a chain attached at 94 to the piston-rod of a cylinder 89 for rocking the arms to transfer the troughs from one position to the other. The arms 64, 65 are of channel construction and the arms 64 are wider ...

COLD DRAWING STRAIGHT BORE TUBES

... 1333831 Drawing BABCOCK & WILCOX CO 19 April 1971 [14 May 1970] 25632/71 Heading B3P [Also in Division F2] A rotary pierced metal tube is formed with a straight bore by cold drawing the tube 10 using a mandrel 12 of uniform cross-section, which mandrel is advanced through the die 17 during the drawing operation to an end position downstream of the die 17. A cylindrical mandrel 12 is first positioned against the pointed end of a steel tube to be drawn. At the start of the draw the mandrel 12 is advanced with the tube through the die 17 until it reaches the desired end position downstream of the die 17, a distance greater than one-half the mandrel diameter, e.g. at least 4 inches. The bore of the drawn tube may have a straightness within a tolerance of Œ0À010 inch in 15 inches or an internal surface wave of amplitude less than one-third of that of an external surface wave.

Forming butted tubes

A method of forming butted tubing comprises drawing a tube through a die 52 held in a holder and over a plug 54 attached to a bar. The die holder and plug bar are each independently moveable in the direction in which the tube is drawn through the die and in the opposite direction. Movement of the holder and bar occurs while the tube is being drawn to vary spacing between them and so vary a wall thickness of the tube. In one aspect the holder is moved in the same direction that the tube is drawn through the die, increasing tube wall thickness. In another aspect, movement of the die holder and of the plug bar are at different speeds in the same direction while the tube is being drawn to vary spacing between the die and plug, so varying a wall thickness. Since the plug and die may be moved in the same direction as the movement of the tube, the large friction forces associated with tube drawing do not have to be overcome to vary the spacing between the die and plug bar which allows for lower ...

METHOD AND APPARATUS FOR MANUFACTURING MOULDS FORMED OF METAL TUBES, TO BE USED IN CONTINOUS CASTING MACHINES FOR BILLETS AND BLOOMS

The present invention relates to a method and apparatus for manufacturing moulds which are circular arc type. A tubular blank 10 is bent into an arched form by means of a die 3, 4 conforming to the outer dimensions of the desired tube mould, and a plug 11 is drawn in an expanding draw through the tubular blank so that the path of motion of the plug is arched, which operation causes the outer surface of the tubular blank to be pressed against the die and the inner surface of the mould to be cold-worked to match the dimensions of the plug. <IMAGE>

Improvements in or relating to the manufacture of metal hollows and apparatus therefor

... 723,014. Rolling tubes. STEWARTS & LLOYDS, Ltd. April 16, 1953 [Jan. 16, 1952], No. 1314/52. Class 83 (4). In apparatus for skew rolling tubes a conically. shaped plug 10, Fig. 8, over which the workpiece 12 is forced and which may pierce a solid work-piece is movable longitudinally between two operating positions during the rolling process. In one example the ends 25, 24, Fig. 7, of a blank are reduced in diameter by moving the plug 10 to a position 10a, Fig. 8, during formation of the ends while normal reduction of the blank is carried out with the apex of the plug opposite the forward end of the frusto-conical tapered section 17 of the rolls. In another example entry of the blank into the rolls is facilitated by initially retracting the plug 10 to a position at which its apex is opposite the, rear end of the frusto-conical section 17. The plug 10, Fig. 1, is attached by a releasable coupling 9 to a support 6 slidable on a bed 1 for removing-the work, but is normally locked in the operating ...

Tube reducing apparatus

... 1,087,207. Rolling tubes. CONTINENTAL TITANIUM METALS CORPORATION G.m.b.H. Oct. 12, 1965 [Oct. 12, 1964], No. 43251/65. Heading B3M. Apparatus for reducing the diameter and/or wall thickness of a tube 18 comprises a base 10, a working head 12 clamped to the base, and two movable carriages 14 and 16 for gripping the ends of the tube and drawing it through the head, the speed of the carriage 16 being controlled in response to back tension created in the tube by the carriage, in order to maintain the back tension constant. The drawing tension produced in the tube by the carriage 14 causes stopping of the carriage if the tension exceeds a sate value. Spring-loaded rollers 26 support the tube during working. The head 12, Fig. 3, includes a base 32 on which a motor-driven rotatable frame 34 is supported by bearings 36 and 38, annular working tools 64 and 66 being carried within the frame. The tools are freely rotatable in eccentrically mounted bearings 56 and are progressively moved around the ...

MANUFACTURING MOULDS FORMED OF METAL TUBES

VOCAL ALARM FOR OUTBOARD ENGINE

VOICE ALARM OUTPUT DEVICE FOR OUTBOARD MOTOR

METHOD OF TUBE DRAWING AND DIE ARRANGEMENT FOR APPLICATION OF THIS METHOD

... 1337195 Drawing INSTYTUT METALURGII ZELAZA IM ST STASZICA 16 March 1971 7051/71 Heading B3P A tube 1 is drawn through two dies 3, 4 using a mandrel which causes the thickness as well as the diameter of the tube to be reduced at the second die 3 and which forms, between the inner tube wall at the first die 4 and a downstream portion 5 of the mandrel, a lubricant passage 6, 7 leading to a lubricant pressure chamber defined between the tube and a recess 14 in the mandrel. The mandrel includes a frusto-conical leading end 11, a cylindrical and frusto-conical working portion 2, a pressure recess 14, a downstream portion 5 of cylindrical, frusto-conical or cylindrical and frusto-conical form and a threaded portion 16 attachable to a mandrel rod. In other embodiments, the mandrel is provided with an additional recess (17) (Fig. 3, not shown) in the working portion 2 or grooves (18) (Fig. 4, not shown) in the downstream portion 5. The mandrel may be formed of components of different material secured ...

VERFAHREN ZUR HERSTELLUNG VON ROHREN GROSSER LANGEN BESONDERS FUR DIE ENERGIEWIRTSCHAFT, WERKZEUGE FUR DIE DURCHFUHRUNG UND NACH DIESEM VERFAHREN HERGESTELLTE ROHRE

DEVICE FOR THE COLD DEFORMING OF PIPES

GRADAUSZIEHMASCHINE UND VERFAHREN ZUM GRADAUSZIEHEN EINES WERKSTÜCKES

In order to allow a more targeted intervention in a drawing procedure, in particular on a linear drawing device, the invention proposes a linear drawing machine for the linear drawing of a workpiece through a drawing ring, a drawing unit, in which one or more drawing tools grasp the workpiece and draw it linearly in the drawing direction, being situated behind the drawing ring, the linear drawing device being distinguished in particular by a drawing ring which is situated fixed in relation to the drawing direction during the drawing procedure, preferably perpendicularly, and by a workpiece guide situated in front of the drawing ring in the drawing direction, which is displaceable perpendicular to the drawing direction.

GRADAUSZIEHMASCHINE UND VERFAHREN ZUM GRADAUSZIEHEN EINES WERKSTÜCKES

In order to allow a more targeted intervention in a drawing procedure, in particular on a linear drawing device, the invention proposes a linear drawing machine for the linear drawing of a workpiece through a drawing ring, a drawing unit, in which one or more drawing tools grasp the workpiece and draw it linearly in the drawing direction, being situated behind the drawing ring, the linear drawing device being distinguished in particular by a drawing ring which is situated fixed in relation to the drawing direction during the drawing procedure, preferably perpendicularly, and by a workpiece guide situated in front of the drawing ring in the drawing direction, which is displaceable perpendicular to the drawing direction.

Material testing method, use of a die assembly and die assembly

Die Erfindung betrifft ein Verfahren zur Materialprüfung eines durch eine Ziehsteinanordnung gezogenen länglichen Werkstücks, wobei die Ziehsteinanordnung ein auf das längliches Werkstück in einem Umformbereich umformend einwirkendes Ziehwerkzeug umfasst und die Materialprüfung in dem Umformbereich durchgeführt wird.

Die assembly and material guide for locating a die assembly and pulling method

Die Erfindung betrifft eine Ziehsteinanordnung (10) mit einem auf ein längliches Werkstück (12) einwirkenden Ziehwerkzeug (14) und mit einem das Ziehwerkzeug lagemden und dem Ziehwerkzeug entgegenwirkenden Ziehwerkzeugträger (16), bei welchem an dem Ziehwerkzeug eine die Masseverteilung des Werkstückmaterials (18) messende Messeinrichtung (20) angeordnet ist, wobei zwischen der Messeinrichtung und dem Ziehwerkzeug ein in einem Umlauf geführtes Koppelmedium (22) vorgesehen ist. Die Erfindung betrifft ferner eine Ziehanlage.

Materialprüfungsverfahren, Verwendung einer Ziehsteinanordnung und Ziehsteinanordnung

A method for material testing of an elongated work piece drawn through a drawing die arrangement, wherein the drawing die arrangement includes a drawing tool that acts on the elongated work piece, forming it in a forming region, carries out the material testing in the forming region.

Die assembly and material guide for locating a die assembly and pulling method

Die Erfindung betrifft eine Ziehsteinanordnung (10) mit einem auf ein längliches Werkstück (12) einwirkenden Ziehwerkzeug (14) und mit einem das Ziehwerkzeug lagernden und dem Ziehwerkzeug entgegenwirkenden Ziehwerkzeugträger (16), bei welchem an dem Ziehwerkzeug eine die Masseverteilung des Werkstückmaterials (18) messende Messeinrichtung (20) angeordnet ist, wobei zwischen der Messeinrichtung und dem Ziehwerkzeug ein in einem Umlauf geführtes Koppelmedium (22) vorgesehen ist. Die Erfindung betrifft ferner eine Ziehanlage.

DRAWING DEVICE FOR PIPES WITH FINALLATERALLY CURVED TUBE SHEET.

PROCEDURE AND DEVICE FOR COLD-DRAWING AND BENDING METAL TUBES.

PROCEDURE FOR CONTINUOUS PULLING OF METAL TUBES.

PROCEDURE AND DEVICE FOR THE WARM PULLING OF EXTRUDED OR PULLED HOLLOW BODIES.

DEVICE TO SECTION WAYS THE AUTOFRETTAGE OF PIPES

VOCAL ALARM FOR OUTBOARD ENGINE

METHOD FOR MANUFACTURE OF A METAL SHELL, AND A CUP DESIGNED TO SERVE AS A BLANK

Device for cold drawing seamless metal tubes having upset portions on both ends

PLUG DRAWING OF HOLLOW BODIES

PLUG DRAWING OF HOLLOW BODIES

TUBE DRAWING TECHNIQUE

TUBE DRAWING TECHNIQUE A method of tube drawing a cold finished stepped internal diameter tube utilizing a novel mandrel plug having compound working surfaces designed to automatically adjust to the varying internal diameters formed in a tube hollow to be worked as it is drawn through a die.

TOOL FOR MAKING ENHANCED HEAT TRANSFER SURFACES

An improved tool assembly for enhancing the surface of a heat transfer tube is provided. The tool assembly includes rods having cutting tips and positioned in rod guides which are slidably positioned in shafts provided in a tool holder. In an equilibrium state, the cutting tips do not extend from the tool holder. When a force is applied to the rod guides, the rod guides move in a first direction along the shafts in the tool holder, resulting in exposure of the cutting tips which enhance the tube surface. When the force is removed from the rod guides, the rod guides move along the shafts in a direction opposite the first direction to retract the cutting tips within the tool holder. In this way, the cutting tips are protected when not in use.

METHODS OF AND DEVICES FOR COLD DRAWING SEAMLESS METAL TUBES EACH HAVING UPSET PORTIONS ON BOTH ENDS

PROCESS FOR PRODUCING A MULTILAYER PIPE HAVING A METALLURGICAL BOND BY DRAWING, AND MULTILAYER PIPE PRODUCED BY THIS PROCESS

The invention relates to a process for producing a multilayer pipe (1 ) from a tubular element having a metallurgical bond comprising at least one outer pipe (10) of metallic material and one inner pipe (20) of metallic material arranged within the outer pipe, the inner surface of the outer pipe (10) being mechanically bonded to the outer surface of the inner pipe (20) at least in parts of their interface, in which, in a production line, the tubular element is simultaneously heated and drawn, wherein each portion of the tubular element is submitted to heating by induction and then to hot-drawing, wherein the tubular element is drawn with a mandrel located therein. Through this process, the existing mechanical connection between the pipes is trans- formed in a metallurgical connection. The invention also relates to a multilayer pipe (1 ) produced for this process, wherein the outer pipe (10) is made of a carbon manganese steel alloy and the inner pipe (2) is made of a corrosion-resistant ...

METHOD OF MANUFACTURING LONG TUBES HAVING SMALL DIAMETERS

Verfahren und Vorrichtung zum Ziehen von Rohren.

Ziehvorrichtung

Verfahren zum Ziehen von Rohren, insbesondere von dünnwandigen Rohren aus Nichteisenmetallen, über Stopfen in mehreren aufeinanderfolgenden Zügen und Ziehbank zur Durchführung des Verfahrens

Verfahren und Vorrichtung zum Strecken von vollen und hohlen Metallwerkstücken.

Procédé d'étirage d'un article de section constante et dispositif pour sa mise en oeuvre

Vorrichtung zum Ziehen von Rohren

Tube drawing - simultaneously through a series of dies alternating with capstans

Stock is drawn through >=2 dies by capstans located after each one and which simultaneously direct the stock to the following die. Pref. >=1 die operates in conjunction with a mandrel within the tube. The stock is threaded by locating a mandrel in the free end, pointing the end, leading it through the die and onto a capstan for >=1 turn; the leading end of the tube is then cut off and the procedure repeated for each successive die. Alternatively the stock may be prestrung by threading it through a series of dies in a similar way, a number of loops being left between each die for subsequently fitting to the capstans.

Rohrreduziereinrichtung

Procédé de fabrication d'un tube, notamment d'un tube en cuivre

Verfahren zum Strecken von metallischen Hohlkörpern über einen Dorn und zur Durchführung dieses Verfahrens bestimmte Walzkaliberreihe

Verfahren und Vorrichtung zum Entfernen eines aus ziehbarem Material bestehenden Elementes

METHOD AND APPARATUS FOR MANUFACTURING MOLDS FOR MOLDING A MIXED CATALYST SYSTEM.

СПОСІБ ВОЛОЧІННЯ ТРУБ

Винахід відноситься до способів обробки металів тиском. Спосіб включає деформацію трубчатої заготовки на короткій утримуваній від осьового переміщення оправці, послідовне здійснювання редукування заготовки по діаметру конічною ділянкою волоки, обтиснення стінки заготовки проміж конічною ділянкою волоки та циліндричною ділянкою оправки, двобічну поліровку заготовки проміж циліндричними ділянками волоки та оправки і однобічну поліровку заготовки циліндричною ділянкою оправки. Згідно з винаходом, після однобічної поліровки заготовки здійснюють роздачу заготовки по діаметру на вихідній ділянці оправки, діаметр якої збільшується в напрямку волочіння, з деформацією , величину якої вибирають в залежності від величини розрахункового показника тонкостінності труби та сумарної деформації витяжки заготовки відповідно до залежності: . Винахід забезпечує підвищення точності труб і зменшення витратного коефіцієнту металу.

Diameter reducing machine for small-sized pipe

Glass tube drawing machine used for metal multiple-unit tube processing

Small -bore nonrust steel pipe drawing die utensil that floats

The utility model discloses a small -bore nonrust steel pipe drawing die utensil that floats, including external mold, centre form and plug, centre form and plug fixed connection, the plug be connected with pneumatic means or hydraulic means and drive centre form along the axial displacement of external mold, the cooperation of external mold and centre form the time, be provided with between external mold and the centre form and draw the passageway, adopt the above -mentioned drawing die of floating utensil to draw drawing the in -process, the drawing die utensil that floats makes the mother metal steel pipe no longer to be free state drawing the in -process steel pipe inside for the in -process location of can floating is being drawn to the steel pipe, makes the steel pipe internal and external surface after drawing more smooth, and it is higher to draw the quality.

Tube drawing machine with fixed die - has core rod positioned at one end and held in middle during drawing by longitudinally movable clamp

L'INVENTION CONCERNE UN BANC ET UN PROCEDE D'ETIRAGE DE TUBES AVEC MANDRIN DE CALIBRAGE INTERIEUR. LE MANDRIN 11 SUPPORTE PAR UNE TIGE 9 EST POSITIONNE DANS LE PASSAGE D'UNE FILIERE 3 AU MOYEN D'UN SUPPORT FIXE 12 A VERIN HYDRAULIQUE, A L'EXTREMITE DE LA TIGE OPPOSEE AU MANDRIN. UN PORTE-TIGES 20 MOBILE DANS LA DIRECTION LONGITUDINALE DU BANC SOUTIENT PAR UN DISPOSITIF DE SERRAGE 23 LA TIGE PORTE-MANDRIN DANS UNE PARTIE MEDIANE 21 ENTRE LE SUPPORT FIXE 12 ET LE MANDRIN 11. L'INVENTION S'APPLIQUE NOTAMMENT A LA FABRICATION DES TUBES DE PRECISION.

VOICE ALARM PROVIDING DEVICE FOR OUTBOARD MOTOR

Procede et appareil de fabrication de tubes de dimensions precises

L'invention concerne la fabrication de tubes tres precis. Elle se rapporte a un appareil dans lequel des elements de tube a sont transportes sur un guide 7 de chariot et sont repousses par un organe 4 sur une tige 61 de mandrin 6 portee par un banc arriere 5. La tige de mandrin est portee par des organes escamotables de support 6a et ne se deforme pas, et les organes de support du tube ont une surface d'amortissement. De cette maniere, les tubes formes sont tres precis, ne sont pas courbes et ne sont pas rayes. Application a la fabrication de tubes tres precis notamment destines a la realisation de tambours de copieurs.

BANC ET PROCEDE D'ETIRAGE DE TUBES AVEC MANDRIN DE CALIBRAGE INTERIEUR

L'INVENTION CONCERNE UN BANC ET UN PROCEDE D'ETIRAGE DE TUBES AVEC MANDRIN DE CALIBRAGE INTERIEUR. LE MANDRIN 11 SUPPORTE PAR UNE TIGE 9 EST POSITIONNE DANS LE PASSAGE D'UNE FILIERE 3 AU MOYEN D'UN SUPPORT FIXE 12 A VERIN HYDRAULIQUE, A L'EXTREMITE DE LA TIGE OPPOSEE AU MANDRIN. UN PORTE-TIGES 20 MOBILE DANS LA DIRECTION LONGITUDINALE DU BANC SOUTIENT PAR UN DISPOSITIF DE SERRAGE 23 LA TIGE PORTE-MANDRIN DANS UNE PARTIE MEDIANE 21 ENTRE LE SUPPORT FIXE 12 ET LE MANDRIN 11. L'INVENTION S'APPLIQUE NOTAMMENT A LA FABRICATION DES TUBES DE PRECISION.

Process and drawing plant of tubes

Drawing of metal tube of tapering wall thickness - uses conical drawing plate insert which is advanced as tube is drawn to produce tennis racket shaft

FLOW FORMING MACHINES

Process and apparatus for the continuous manufacture and the widening of the tubular products

FORFARANDE OCH ANORDNING FOR KALLDRAGNING AV ROR

STEEL TUBE DRAWING PROCESS AND APPARATUS

One aspect of the invention concerns a steel tube drawing process in which a hot rolled seamless steel tube (10) of relatively large outside diameter and wall thickness is drawn down to a smaller outside diameter and wall thickness. The process of the invention comprises at least one drawing stage in which the tube (10) is located over a mandrel (24), the tube (10) is induction heated and drawn over the mandrel (24) and through a drawing die (22) which reduces the outside diameter of the tube, and the drawn tube is thereafter cooled. Another aspect of the invention concerns an apparatus which is used in the process.

STEEL PIPE FOR USE AS EMBEDDED EXPANDED PIPE, AND METHOD OF EMBEDDING OIL-WELL STEEL PIPE

... (1) A steel pipe to be expanded in a state in which it is inserted in a well, such as an oil well, characterized in that the wall thickness eccentricity EO(%) prior to pipe expansion satisfies the following formula 1: EO ≤ 30 / (1 + 0.018 a) ...1 where α is the pipe expansion percentage (%) calculated from the following formula 2. α = [(inner diameter of pipe subsequent to pipe expansion inner diameter of pipe prior to pipe expansion) / inner diameter of pipe prior to pipe expansion] x 100 ...2. (2) A steel pipe to be expanded in a state in which it is inserted in a well, characterized in that the wall thickness eccentricity is not more than 10%. If a pipe embedding and expanding method is embodied using the steel pipe described in (1) or (2) above, the expanded steel pipe is prevented from having its crushing strength decreased, and the bending of the steel pipe is reduced.

VEHICLE FRAME HAVING ENERGY MANAGEMENT SYSTEM AND METHOD FOR MAKING SAME

A hollow structural member (30) for a vehicle is provided with a unitary energy absorbing end portion (34) having a reduced wall thickness (T2), for deforming and absorbing the force of an impact, and a site for initiating such deformation. The initiation site preferably comprises a taper of the end section. A method for forming the structural members includes the steps of reducing the wall thickness of the member end section and subsequent tapering of the end section.

Plug drawing of tubes and other hollow items

BASE TUBE FOR COLD-DRAWING, MANUFACTURING METHOD FOR SAME, AND MANUFACTURING METHOD FOR COLD-DRAWN TUBE

PLUG FOR COLD DRAWING AND PRODUCTION METHOD OF METAL PIPE

A plug 1 includes a first columnar portion 20, a tapered portion 30, and a second columnar portion 40. The first columnar portion 20 has an outside diameter D1. The second columnar portion 40 has an outside diameter D2 which is larger than the outside diameter D1. The tapered portion 30 is formed between the first columnar portion 20 and the second columnar portion 40. The tapered portion 30 has a tapered surface 31 provided with an outside diameter which is gradually increased from the first columnar portion 20 to the second columnar portion 40, and an axial direction length L. The outside diameters D1 and D2, and the axial direction length L meet the following expressions (1) to (4): 0.25 ≤ ρ ≤ 2.00 0.06 ≤ L / D ⁢ 2 ≤ 0.8 L / D ⁢ 2 ≤ 0.3 × ρ + 0.575 and L / D ⁢ 2 ≥ 0.1 × ρ where ρ = (D2 - D1)/D1 × 100. Therefore, the cold drawing plug according to the present invention can reduce the tensile residual stress on the outer surface of a metal pipe after the cold drawing.

Improvements in or relating to the plug drawing of tubes and other hollow items

Preparation bench for a tube-drawing installation

MANUFACTURE OF CLAD PIPE BY DRAWING AND EXPANDING

PURPOSE: To prevent a plug from being pulled in and to reduce a fixing force by using outer and inner pipes having different usable characteristics respectively and cold drawing the pipes between a fixed-type stepped plug having two or more steps, and a die. CONSTITUTION: An expanding part 7 is provided to the tail part of a plug 3 having a plug head 5, and the small diametral part of a die 4 is disposed between the plug head 5 and the expanding part of plug tail-part. In said constitution; two kinds of outer and inner pipes 1, 2 having respectively different usable characteristics are overlapped with each other, and are pulled into the die 4 after inserting the stepped plug 3 into the pipes 1, 2, to draw the pipes 1, 2 in the arrow A direction. At that time, the pipes 1, 2 are simultaneously drawn and expanded at the exit of the die 4 by the plug head 5 to form a clad pipe by press-welding the outer pipe 1' and the inner pipe 2' together by the residual stress. In this way, the plug 3 ...

УСТРОЙСТВО ДЛЯ ПРОИЗВОДСТВА ТРУБ И ОБОЛОЧЕК БОЛЬШОГО ДИАМЕТРА

Использование: при производстве тонкостенных длинномерных труб и оболочек большого диаметра в холодном и теплом состоянии. Сущность изобретения: производят деформацию полой заготовки в калибре матрицы с помощью неприводных роликов вращающейся обоймы. Наружный диаметр деформируемого материала принимают большим диаметра калибра матрицы. Рабочий профиль матрицы и конфигурацию роликов выбирают из условий наименьшего сопротивления относительному перемещению деформируемого металла в контактных зонах. 2 з.п. ф-лы, 3 ил.

СПОСОБ ИЗГОТОВЛЕНИЯ КОРПУСОВ СНАРЯДОВ

Использование: изобретение относится к области обработки металлов давлением и может быть использовано на трубопрокатных агрегатах, имеющих в своем составе станы винтовой прокатки и станы горячего волочения или проталкивания, использующие стакановидную заготовку. Сущность: в данном способе в качестве исходной заготовки используют утилизированный корпус снаряда. От его оживальной переменного диаметра части отрезают 20-40% длины корпуса. Стакановидную разнотолщинную часть корпуса снаряда нагревают в индукторе в вертикальном положении дном вверх до равномерной температуры. Равномерно нагретый разнотолщинный стакан задают донным концом в валки и осуществляют винтовую деформацию тремя валками на профильной оправке. Затем производят проталкивание на профильной оправке через ряд фильер или обойм. Полученный корпус обладает высокой размерной точностью, поскольку используемый в качестве исходной заготовки утилизированный корпус имеет точные размеры, подвергается равномерному нагреву и винтовой прокатке ...

Method for producing a small thin-walled tube from a magnesium alloy

The invention relates to a method for producing a small thin-walled tube for a medical application or for a medical product, in particular for a stent, wherein a blank of an in particular bioresorbable magnesium alloy is deformed to produce a small tube, after which the small tube is used for medical purposes or from which the medical product, such as a stent, can be made. In order to be able to produce the small tube in one step and with high precision, it is provided according to the invention that a male die ( 2 ) with a base body ( 3 ) and a mandrel ( 4 ) tapered relative to the base body ( 3 ) and the blank is provided with a blind hole or an opening, wherein a diameter of the blind hole or the opening of the blank is equal to or greater than an outer diameter of the mandrel ( 4 ), after which the blank with inserted mandrel ( 4 ) with the male die ( 2 ) is pressed forwards at least in part through a female die ( 5 ) with a receiving region ( 6 ) and a contouring region ( 7 ), wherein the contouring region ( 7 ) has a free diameter, which is larger than the outer diameter of the mandrel ( 4 ), but smaller than an outer diameter of the blank, in order to form the small tube.

Apparatus and method for drawing metal tube

In an apparatus for drawing a metal tube in which lubrication oil is ejected from an ejecting opening formed in a hollow rod supporting a plug to apply the lubrication oil onto an inner surface of a raw tube, the lubrication oil ejection responsiveness when a discontinuous lubrication oil supply is performed is enhanced. In the drawing apparatus in which a metal raw tube ( 2 ) is processed by passing the same between a die ( 10 ) for forming an outer surface and a plug ( 11 ) for forming an inner surface, an ejecting opening ( 21 ) from which lubrication oil (L) is ejected opens into an outer peripheral surface of a hollow rod ( 20 ) supporting the plug ( 11 ). The ejecting opening ( 21 ) is provided only in a region of the rod ( 20 ) higher than the center thereof in the up-and-down direction.

Rotary sputter target assembly

This invention utilizes a co-extrusion or co-drawing process to directly bond a tubular target to an inner backing tube. The co-extrusion or co-drawing process reduces the inner and outer diameters of the outer tubular target to cause portions of the target to protrude and at least partially fill into grooves along the inner backing tube. The filling causes the target to interlock to the backing plate.

HOLLOW DRIVE SHAFT WITH FLANGE AND METHOD FOR THE PRODUCTION THEREOF

A method for producing a tubular, hollow drive shaft, in particular a cardan shaft, from a pre-tube, in particular a longitudinally welded, normalized steel tube, which is extended by having the wall thickness thereof reduced at least sectionally by way of single or multiple ironing or another cold forming operation and/or by having the inner diameter and/or outer diameter thereof changed, wherein at least one pre-tube end or shaft end is configured into a flange that is integrated in one piece by to way of cold forming. 1110302. A method for producing a tubular , hollow drive shaft () , which is a cardan shaft , from a pre-tube () , which is a longitudinally welded , normalized steel tube , and which is extended by having the wall thickness thereof reduced at least sectionally by way of single or multiple ironing or another cold forming operation or by having the inner diameter or outer diameter thereof changed , characterized in that at least one pre-tube end () or shaft end is configured into a flange () that is integrated in one piece by way of cold forming.210291. The method according to claim 1 , characterized in that a portion (I claim 1 , II) of the pre-tube () not associated with the flange () or not adjoining the flange is ironed claim 1 , or changed by way of cold forming claim 1 , in such a way that a portion (III claim 1 , ) of the drive shaft () associated with the flange or adjoining the flange has the thickest wall (D).3302. The method according to claim 2 , characterized in that the cold forming operation of the pre-tube or shaft end () to obtain the flange () includes single or multiple ironing operations of the end and subsequent bending of the end.4301043843384355. The method according to claim 3 , in which as part of the formation of the flange claim 3 , in a pre-forming step the wall at the end () of the pre-tube () is given an angled position with respect to a tube center axis () by way of an at least sectionally conical bending punch () claim ...

METHOD FOR MANUFACTURING DRIVE SHAFT

Disclosed in a method for manufacturing a drive shaft which comprises forming a first shaft unit by shrinking one side of a metallic pipe which has a uniform first strength; decreasing the thickness of an intermediate portion of the metallic pipe by drawing the intermediate portion of the metallic pipe which is integral with the first shaft unit forming at an inner side surface of the other side of the metallic pipe a strength decrease unit which has a second strength smaller than the first strength, by heat-treating by a predetermined distance the inner side surface of the other side being opposite to one side of the metallic pipe; and forming a second shaft unit without transforming any portion of the intermediate portion by shrinking the metallic pipe which has the strength decrease unit, wherein the second shaft unit is formed by applying compression force to a portion where the strength decrease unit in the metallic pipe is formed, in a predetermine direction being vertical with respect to the axial direction of the metallic pipe. 1. A method for manufacturing a drive shaft , comprising:forming a first shaft unit by shrinking one side of a metallic pipe which has a uniform first strength;decreasing the thickness of an intermediate portion of the metallic pipe by drawing the intermediate portion of the metallic pipe which is integral with the first shaft unit;forming at an inner side surface of the other side of the metallic pipe a strength decrease unit which has a second strength smaller than the first strength, by heat-treating by a predetermined distance the inner side surface of the other side being opposite to one side of the metallic pipe; andforming a second shaft unit without transforming any portion of the intermediate portion by shrinking the metallic pipe which has the strength decrease unit,wherein the second shaft unit is formed by applying compression force to a portion where the strength decrease unit in the metallic pipe is formed, in a ...

PREPARING A TUBE END FOR ROD DRAWING

An apparatus for preparing a tube end for rod drawing with a floating mandrel has a releasable holder for the tube end centered on an axis, a frustoconical and spreadable floating mandrel, and a device for inserting the mandrel into the tube end and spreading the mandrel to flare the tube end. The apparatus further has a feed mechanism for inserting the floating mandrel into the tube end and/or a deforming device for making at least one indentation in the tube for holding the floating mandrel. 1. An apparatus for preparing a tube end for rod drawing with a floating mandrel , the apparatus comprising:a releasable holder for the tube end centered on an axis;a frustoconical and spreadable floating mandrel; andmeans for inserting the mandrel into the tube end and spreading the mandrel to flare the tube end.2. The apparatus defined in claim 1 , further comprising:a deforming device for forming a first indentation in the tube for gripping the floating mandrel.3. The apparatus defined in claim 1 , wherein the mandrel has an injector for introducing drawing oil into the tube.4. The apparatus defined in claim 2 , wherein the deforming device form the first indentation axially in front of the mandrel and a second indentation axially behind the mandrel and spaced from the first mandrel.5. The apparatus defined in claim 4 , wherein the mandrel has a head axially captured in the tube between the indentations.6. The apparatus defined in claim 4 , wherein the tube can be held by the first indentation in a form-fitting manner axially of the tube when the spreadable mandrel widens the tube end.7. The apparatus defined in claim 2 , wherein the deforming device has at least two pressing pins spaced axially from one another and pressable independently of one another against the tube end.8. The apparatus defined in claim 1 , further comprising:a pointing press for imparting a pointed shape to the tube end for drawing tongs after introduction of the floating mandrel.9. A method for ...

A MANDREL ADJUSTMENT ASSEMBLY FOR A MULTI-WALL PIPE PRODUCTION MADE OF COATED METAL SHEET

Invention relates to is a mandrel adjustment assembly for multi-wall pipe made of a coated metal sheet comprising; a bearing positioning an elongated mandrel over a tray by holding; a distance adjustment unit having an adjustment member adjusting a stroke distance of mandrel by changing axial location of bearing; a first support and a second support holding mandrel over a tray such that the mandrel is freely movable between a distal end and an opposite proximal end. A distance adjustment unit is equipped with a display enabling visual access to a stroke distance set by an adjustment arm and the distance adjustment unit move the mandrel over the tray providing a displacement equal to stroke distance. 1. A mandrel adjustment assembly for multi-wall pipe made of a coated metal sheet comprising; a bearing positioning an elongated mandrel over a tray by holding; a distance adjustment unit having an adjustment member adjusting a stroke distance of mandrel by changing axial location of bearing; a first support and a second support holding mandrel over a tray such that the mandrel is freely movable between a distal end and an opposite proximal end characterized in that distance adjustment unit is equipped with a display enabling visual access to a stroke distance set by an adjustment arm and the distance adjustment unit move the mandrel over the tray providing a displacement equal to stroke distance.2. The mandrel adjustment assembly according to claim 1 , wherein a holding arm on which the display is adapted to measure the stroke distance and moving while pushing the bearing supported by the tray from one end thereof.3. The mandrel adjustment assembly according to claim 2 , wherein a housing on which the display is mounted and the holding arm telescopicaly received is secured to the bearing.4. The mandrel adjustment assembly according to claim 3 , wherein the holding arm is vertically positioned at the support edge of tray from a free end of the tray.5. The mandrel ...

PRECURSOR DETECTION METHOD AND PRECURSOR DETECTION DEVICE OF STICK-SLIP PHENOMENON, AND METHOD FOR COLD-DRAWING PIPE OR TUBE USING PRECURSOR DETECTION METHOD

A precursor detection device detects a precursor of a stick-slip phenomenon in a drawing machine The precursor detection device includes a load measurement section for measuring a load applied to a plug support bar in the drawing direction, a precursor detection section for detecting a precursor of a stick-slip phenomenon based on a load measurement value measured by the load measurement section and a control section After drawing is started, a load applied to the plug support bar in the drawing direction is measured by the load measurement section during a predetermined period from a measurement start point to a measurement end point, and based on the measured load measurement values, a precursor of a stick-slip phenomenon is detected by the precursor detection section 1. A precursor detection method for detecting a precursor of a stick-slip phenomenon during a cold drawing of a pipe or tube by a drawing machine including a die , a plug provided in the die , and a plug support bar for supporting the plug , the precursor detection method of the stick-slip phenomenon comprising:a load measurement step of measuring a load applied to the plug support bar in the drawing direction, during a predetermined period from a measurement start point to a measurement end point after drawing is started; anda precursor detection step of detecting a precursor of the stick-slip phenomenon based on load measurement values obtained in the load measurement step.2. The precursor detection method of the stick-slip phenomenon according to claim 1 , whereinin the precursor detection step, frequency analysis of load measurement values is performed over a predetermined frequency band, and it is judged that the precursor of the stick-slip phenomenon has occurred when a peak intensity of an obtained frequency spectrum by the frequency analysis exceeds a predetermined reference value.3. A method for cold drawing a pipe or tube claim 1 , wherein{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, ' ...

METHOD OF MANUFACTURING VARIABLE WALL THICKNESS STEEL PIPE AND VARIABLE WALL THICKNESS STEEL PIPE

There is provided a method of manufacturing a variable wall thickness steel pipe with a hollow tubular raw pipe. The method of manufacturing a variable wall thickness steel pipe includes locking the raw pipe in a die by thrusting a plug into the raw pipe from an one end side, so as to expand an outer shape on the one end side in a state, where the raw pipe is disposed inside the die and movement of the raw pipe in a longitudinal direction is restricted; and performing ironing in which an inner shape of the raw pipe is expanded while the outer shape is maintained so that a thin portion is formed by further thrusting the plug toward the other end side of the raw pipe while the locked state of the raw pipe is maintained, whereas the restriction on the raw pipe is relaxed. 1. A method of manufacturing a variable wall thickness steel pipe with a hollow tubular raw pipe , the method comprising:locking the raw pipe in a die by thrusting a plug into the raw pipe from an one end side, so as to expand an outer shape on the one end side, in a state where the raw pipe is disposed inside the die and movement of the raw pipe in a longitudinal direction is restricted; andperforming ironing in which an inner shape of the raw pipe is expanded while the outer shape is maintained so that a thin portion is formed by further thrusting the plug toward the other end side of the raw pipe while the locked state of the raw pipe is maintained, whereas the restriction on the raw pipe is relaxed.2. The method of manufacturing a variable wall thickness steel pipe according to claim 1 ,wherein in the performing ironing, an unprocessed portion remains on the other end side of the raw pipe by stopping thrusting the plug in the middle.3. The method of manufacturing a variable wall thickness steel pipe according to claim 1 ,wherein a thickness reduction rate of the thin portion in the performing ironing is within a range from 10% to 90%.4. The method of manufacturing a variable wall thickness steel ...

Method and apparatus for axially shaping a tube

A method and an apparatus for axially shaping a tube use a mandrel guided in the tube and an annular die guided on the outside of the tube. The tube is clamped in a clamping device. The outer diameter of the tube is reduced by moving the annular die in a pushing direction. In order to form undercuts on the outside and inside of the tube the method uses the following steps: Reversing the direction of movement of the die and the mandrel upon reaching an end position from the pushing direction to an opposite pulling direction. In a first setting step, the die and the mandrel are then moved in relation to one another to a first preset annular-gap setting, and in a subsequent first shaping step, the die and the mandrel are moved in the pulling direction, while maintaining the preset annular gap.

Tubular element for gas pressure vessel, gas pressure vessel and method of manufacturing a tubular element

This invention concerns a tubular element for a gas pressure vessel of an airbag module, in particular of a vehicle, wherein the tubular element (1) consists of high-strength steel, has a first and a second end (17, 18) and from the first end (17) to the second end (18) the tubular element (1) has an undeformed section (11), a transition section (12) and a tapering section (13) and on the tapering section (13) at least one radially outwardly extending collar (14) is formed, characterized in that the collar (14) is separated from the transition section (12) by a first length section (130) having an outer diameter (A1) smaller than the outer diameter (A2) of the collar (14) and the wall thickness of the collar (14) is greater than the wall thickness of the first length section (130). Furthermore, the invention concerns a gas pressure vessel and a process for manufacturing a tubular element according to the invention (1).

Floating Draw Plug and Method of Drawing Tube

A floating draw plug for shaping tube comprises a necking body and a rib forming member. The necking body has an axis and a trailing end portion. The trailing portion has a cross-section that is symmetric about the axis and that converges toward the axis as it extends downstream. The rib forming member comprises helical protrusions and helical grooves. The helical protrusions and the helical grooves are aligned with the axis. The rib forming member is connected to the necking body in a manner such that at least a portion of the helical protrusions and at least a portion of the helical grooves extend downstream of the trailing portion of the necking body and such that the rib forming member is free to rotate about the axis relative to the necking body. 1. A floating draw plug for shaping tube , the draw plug comprising:a necking body, the necking body having an axis and a trailing end portion, the trailing end portion having a cross-section that is symmetric about the axis and that converges toward the axis as it extends downstream; and,a rib forming member, the rib forming member comprising helical protrusions and helical grooves, the helical protrusions and the helical grooves being aligned with the axis, the rib forming member being connected to the necking body in a manner such that at least a portion of the helical protrusions and at least a portion of the helical grooves extend downstream of the trailing portion of the necking body and such that the rib forming member is free to rotate about the axis relative to the necking body.2. A floating draw plug in accordance with wherein the helical protrusions have a constant radius from the axis as they extend downstream.3. A floating draw plug in accordance with wherein the necking body has an axial downstream recess and a portion of rib forming member extends therein.4. A floating draw plug in accordance with wherein the rib forming member is attached to the necking body via a threaded fastener.5. A floating draw ...

SQUARE TUBE FORMING METHOD AND SQUARE TUBE FORMING DEVICE

To enhance forming performance enhanced in square tube forming of forming a round tube into a square tube by passing the round tube through a plurality of roll stands arranged in a raw tube forming direction. To give a high degree of multi-usability to a square tube forming device. To suppress the entire length of a roll stand array. A first flat roll stand A and a second flat roll stand B of rolling directions orthogonal to each other are arranged alternately in a forming direction to form a roll stand array Each of the roll stands A and B includes roll gap adjusting means by which a rolling amount is independently settable, and one of the first flat roll stand A and the second flat roll stand B adjacent to each other is driven to rotate by roll driving means A forming rolling amount distribution is allocated individually as a rolling amount at each of the roll stands A and B. The forming rolling amount distribution is determined in advance for stands from a first-stage stand to a final-stage stand in response to the outer diameter, thickness, and material of a forming target raw tube and an intended dimension of a square tube as a product. 1. A square tube forming method of forming a round tube of any diameter as a forming target raw tube into a square tube of any dimension as a product by passing the round tube through a plurality of stages of roll stands arranged in a raw tube forming direction , comprising:using a flat roll stand array in which a first flat roll stand and a second flat roll stand of rolling directions orthogonal to each other are arranged alternately in a forming direction for a tube member and in which a rolling amount at each roll stand is independently settable;allocating a forming rolling amount distribution individually as a rolling amount at each roll stand in the flat roll stand array, the forming rolling amount distribution being determined in advance for the stands from a first-stage stand to a final-stage stand in response to the ...

DRAWING MACHINE FOR DRAWING TUBES

A drawing machine () for drawing a tube (), defining a longitudinal axis (Y), comprising a first die () for carrying out the drawing of the tube by means of the use of a mandrel (); a device for varying the inclination () of the tube inlet into said first die (); a second die () for carrying out a skin pass operation on the tube, arranged downstream of said first die (); an in-line system for detecting the eccentricity of the tube; a data processing system () for processing signals originating from said detection system and sending input data to said device for varying the inclination () of the tube to vary the inclination of the tube so as to correct the eccentricity of the tube in-line; wherein said in-line system for detecting the eccentricity of the tube comprises a first detection head comprising at least three first transducers () arranged downstream of said first die (). 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. An in-line method for correcting an eccentricity of a tube during a drawing thereof , by means of a drawing machine , the method comprising the following stages:drawing the tube by means of the first die;carrying out a skin pass operation on the tube by means of the second die;carrying out a first in-line detection of the eccentricity of the tube by means of the first detection head;processing the signals originating from said first detection head by means of the data processing system and sending input data to the inclination variation device so as to vary the inclination of the tube with respect to the longitudinal axis and to correct the eccentricity of the tube in-line.11. A method according to claim 10 , wherein said first in-line detection of the eccentricity of tube is provided at said second die and/or at an area arranged downstream of said first die and upstream of said second die.12. A method according to claim 10 , wherein there is provided a second in-line ...

TWIST-AXLE WITH LONGITUDINALLY-VARYING WALL THICKNESS

The invention relates to a twist-axle that includes a cross-beam member and two trailing arms, each trailing arm rigidly secured to the cross-beam member in one of two connection regions of the cross-beam member or formed integrally with and extending from one of the two connection regions. The cross-beam member is formed from a tubular blank and has a torsionally elastic central portion and two torsionally stiff connection regions. The cross-beam member has a wall thickness that varies longitudinally along the length of the cross-beam member from the torsionally elastic central portion to each of the torsionally stiff connection regions. 1. A unitary , tubular cross-beam member for use in a twist-axle of a vehicle , the twist-axle being provided with two trailing arms , the cross-beam member extending between and joining the trailing arms at two connection regions of the cross-beam member to form an integral axle , the cross-beam member comprising a central section formed between the two connection regions , the central section being torsionally elastic and each of the connection regions being torsionally stiff adjacent at least a portion of the connection region joining each of the trailing arms , the cross-beam member having a wall thickness that is generally uniform circumferentially and varying longitudinally from the torsionally elastic central section to each of the torsionally stiff connection regions.2. The cross-beam member of claim 1 , wherein the wall thickness of the cross-beam member varies smoothly from the torsionally elastic section to each of the torsionally stiff connection regions.3. The cross-beam member of claim 1 , wherein the wall thickness in at least a portion of the connection regions is greater than that in the central section.4. (canceled)5. The cross-beam member of claim 1 , wherein the central section has a generally open transverse profile to provide the torsional elasticity.6. The cross-beam member of claim 1 , wherein the cross-beam ...

Multi-layer pipe manufacturing apparatus and method of manufacturing multi-layer pipes using the same

An apparatus for manufacturing a multi-layer pipe is provided. The apparatus includes a ram extruding a matrix pipe, which is formed by inserting one or more insert pipes having different diameters into a receiving pipe, with a constant compression force, a heat-treatment unit heat-treating the matrix pipe extruded from the ram, and a drawing unit drawing, with a constant drawing force, the matrix pipe passing through the heat-treatment unit into a multi-layer pipe having a predefined diameter.

ELECTRIC RESISTANCE WELDED STEEL PIPE HAVING IDENTIFIABLE SEAM PORTION AND METHOD FOR MANUFACTURING THE SAME

A method for manufacturing an electric resistance welded steel pipe having an identifiable seam portion. The method includes electric resistance welding a steel pipe, cutting an inner surface bead and an outer surface bead of the steel pipe in such a manner so as to cut: (i) a whole the outer surface bead and a part of the inner surface bead to leave an uncut portion in the inner surface bead, or (ii) a whole of the inner surface bead and a part of the outer surface bead to leave an uncut portion in the outer surface bead, coating the steel pipe with zinc phosphate, and cold drawing the steel pipe using a plug and a die to make the seam portion of the steel pipe identifiable. 1. A method for manufacturing an electric resistance welded steel pipe having an identifiable seam portion , the method comprising:rounding a steel strip in a width direction by roll forming while continuously feeding the steel strip;joining both ends of the rounded steel strip in the width direction by electric resistance welding to make a steel pipe having a seam portion formed by the joining;cutting an inner surface bead and an outer surface bead of the steel pipe in such a manner so as to cut: (i) a whole of the outer surface bead and a part of the inner surface bead to leave an uncut portion in the inner surface bead, or (ii) a whole of the inner surface bead and a part of the outer surface bead to leave an uncut portion in the outer surface bead, and the cutting of the inner surface bead and the outer surface bead is performed so that a protrusion of the uncut portion has a protrusion height h of greater than or equal to 0.07 times and less than or equal to 1.7 times a wall thickness t of a non-bead portion of the steel pipe;applying coating of zinc phosphate to at least an outer surface of the steel pipe to form a coating portion; andsubjecting the steel pipe to cold drawing using a plug and a die.2. The method of claim 1 , wherein the cutting of the inner surface bead and the outer ...

Process for producing a multilayer pipe having a metallurgical bond by drawing, and multilayer pipe produced by this process

The invention relates to a process for producing a multilayer pipe ( 1 ) from a tubular element having a metallurgical bond comprising at least one outer pipe ( 10 ) of metallic material and one inner pipe ( 20 ) of metallic material arranged within the outer pipe, the inner surface of the outer pipe ( 10 ) being mechanically bonded to the outer surface of the inner pipe ( 20 ) at least in parts of their interface, in which, in a production line, the tubular element is simultaneously heated and drawn, wherein each portion of the tubular element is submitted to heating by induction and then to hot-drawing, wherein the tubular element is drawn with a mandrel located therein. Through this process, the existing mechanical connection between the pipes is trans- formed in a metallurgical connection. The invention also relates to a multilayer pipe ( 1 ) produced for this process, wherein the outer pipe ( 10 ) is made of a carbon manganese steel alloy and the inner pipe ( 2 ) is made of a corrosion-resistant alloy.

DRAWING MACHINE FOR DRAWING TUBES

A drawing machine () for drawing a tube (), defining a longitudinal axis (Y), comprising a first die () for carrying out the drawing of the tube by means of the use of a mandrel (); a device for varying the inclination () of the tube inlet into said first die (); a second die () for carrying out a skin pass operation on the tube, arranged downstream of said first die (); an in-line system for detecting the eccentricity of the tube; a data processing system () for processing signals originating from said detection system and sending input data to said device for varying the inclination () of the tube to vary the inclination of the tube so as to correct the eccentricity of the tube in-line; wherein said in-line system for detecting the eccentricity of the tube comprises a first detection head comprising at least three first transducers () arranged downstream of said first die (). 1. A drawing machine for drawing a tube , defining a longitudinal axis , comprising:a first die for carrying out a drawing of the tube by means of a mandrel;an inclination variation device for varying the inclination of the tube entering into said first die;an in-line detection system for detecting an eccentricity of the tube;a data processing system for processing signals originating from said in-line detection system and sending input data to said inclination variation device to vary the inclination of the tube so as to correct the eccentricity of the tube in-line;characterized in that there is provided a second die for earning out a skin pass operation on the tube, which is arranged downstream of said first die, and in that said in-line detection system comprises a first detection head arranged downstream of said first die and comprising at least three first transducers.2. A machine according to claim 1 , wherein said first detection head is arranged in a die holder of said second die and/or in a chamber claim 1 , coaxial to the longitudinal axis claim 1 , provided between a die holder of ...

THIN, NARROW TUBE AND DRAWING APPARATUS AND DRAWING METHOD FOR MANUFACTURING THE SAME

Provided is a thin, narrow tube for use in a biodegradable medical device formed from a round tube made of a magnesium material as the base material, in which a desired outer diameter and an inner diameter are provided with good precision over the entire region in a longitudinal direction and a circumferential direction, and the length of biodegradation time can be controlled without changing a material composition. The thin, narrow tube is a thin, narrow tube of a biodegradable medical device, in which the thin, narrow tube is a round tube made of crystals containing magnesium (Mg) having a hexagonal crystal structure, and when the crystals forming the round tube are viewed in a round tube axis direction of the round tube, a hexagonal basal plane (0001) is oriented at a predetermined inclination angle with respect to a circumferential direction perpendicular to a radial direction (a direction from an inner surface to an outer surface) of the round tube. 1. A drawing apparatus for manufacturing a tube of a biodegradable medical device , said tube comprising a round tube made of a magnesium alloy (Mg) having a hexagonal crystal structure , andthe magnesium alloy forming the round tube, viewed in a round tube axis direction of the round tube, has hexagonal basal planes (0001) of crystals of magnesium alloy oriented at a predetermined inclination angle with respect to a circumferential direction perpendicular to a radial direction of the round tube,the drawing apparatus comprising at least:first means including a part α which surrounds the round tube while being in contact with the round tube in a circumferential direction to reduce a diameter of the round tube; andcylindrical second means which is disposed to oppose a minimum inner diameter portion of the part α and of which a side surface supports the round tube,wherein a center axis of the minimum inner diameter portion and a center axis of the second means coincide with a drawing direction of the round tube,the ...

THIN, NARROW TUBE AND DRAWING APPARATUS AND DRAWING METHOD FOR MANUFACTURING THE SAME

Provided is a thin, narrow tube for use in a biodegradable medical device formed from a round tube made of a magnesium material as the base material, in which a desired outer diameter and an inner diameter are provided with good precision over the entire region in a longitudinal direction and a circumferential direction, and the length of biodegradation time can be controlled without changing a material composition. The thin, narrow tube is a thin, narrow tube of a biodegradable medical device, in which the thin, narrow tube is a round tube made of crystals containing magnesium (Mg) having a hexagonal crystal structure, and when the crystals forming the round tube are viewed in a round tube axis direction of the round tube, a hexagonal basal plane (0001) is oriented at a predetermined inclination angle with respect to a circumferential direction perpendicular to a radial direction (a direction from an inner surface to an outer surface) of the round tube. 1. A thin , narrow tube of a biodegradable medical device ,wherein the thin, narrow tube is a round tube made of crystals containing magnesium (Mg) having a hexagonal crystal structure, andwhen the crystals forming the round tube are viewed in a round tube axis direction of the round tube, a hexagonal basal plane (0001) is oriented at a predetermined inclination angle with respect to a circumferential direction perpendicular to a radial direction of the round tube.2. The thin claim 1 , narrow tube according to claim 1 ,wherein the orientation is specified in a pole figure obtained by using an electron back-scatter diffraction (EBSD) method performed on a radial cross-section of the round tube, anda strong signal caused by a high-density orientation structure A having a peak intensity of 6/7 or more of a maximum peak intensity in the hexagonal basal plane (0001) is observed within an inclination angle of ±30° with respect to the circumferential direction, and the high-density orientation structure A is oriented.3. ...

INSTRUMENT PANEL BEAM, PAIR OF BRACKETS, AND INSTRUMENT PANEL BEAM ASSEMBLY

An instrument panel beam is the instrument panel beam that is arranged in the width direction of an automobile, and includes: a large-diameter hollow tube having a hollow cylindrical shape; and a small-diameter hollow tube which is joined to the large-diameter hollow tube in an axial direction, has a diameter that is smaller than that of the large-diameter hollow tube, and has a hollow cylindrical shape. The small-diameter hollow tube includes two flat plates that extend in a longitudinal direction and two bends that are curved in a circumferential direction, and the flat plates and the bends are alternately arranged in the circumferential direction. 1. An instrument panel beam that extends in a width direction of an automobile , the instrument panel beam comprising:a large-diameter hollow tube having a hollow cylindrical shape; anda small-diameter hollow tube having a diameter that is smaller than that of the large-diameter hollow tube and having a hollow cylindrical shape,whereinthe large-diameter hollow tube and the small-diameter hollow tube are joined to each other in an axial direction, andthe small-diameter hollow tube comprises at least two flat plates that extend in a longitudinal direction and at least two bends that are curved in a circumferential direction, the flat plates and the bends being alternately arranged in the circumferential direction.2. The instrument panel beam according to claim 1 , whereinthe large-diameter hollow tube comprises at least two flat plates that extend in a longitudinal direction and at least two bends that are curved in a circumferential direction, the flat plates and the bends being alternately arranged in the circumferential direction.3. The instrument panel beam according to claim 2 , whereinthe at least two bends of the large-diameter hollow tube have a curved surface shape that is convex outward in a radial direction.4. The instrument panel beam according to claim 1 , whereinthe at least two bends of the small-diameter ...

Cylinder Tube Closed At The End So As To Be Fluid-Tight And Method For Production Thereof

A method for producing a cylinder tube (), which is closed at the end so as to be fluid-tight, from a tubular blank (). The blank () is formed into the cylinder tube () with the aid of a cold forming method in such a way that on an end region () of the cylinder tube () an opening () remains in the cylinder tube (), a mounting region () is produced in the radially outer edge region () of the end region () and the cylinder tube () is closed by fluid-tight attachment on the mounting region () of an end piece () which closes the opening (). A cylinder tube () comprises the cylinder tube () cold formed from the blank () having an opening () at the end, the mounting region () and an end piece () attached to the mounting region () so as to be fluid-tight. 1230. A method for producing a cylinder tube () , which is closed at an end so as to be fluid-tight , for a shock absorber tube of a shock absorber of a motorized vehicle , from a tubular blank () , characterized by the following steps:{'b': 30', '2', '8', '30', '6', '2, '(a) forming the blank () into a cylinder tube () by means of a sheet metal deep-drawing cold forming process with an opening () remaining in the cylinder tube () on an end region () of the cylinder tube (),'}{'b': 12', '10', '6, '(b) producing a mounting region () in a radially outer edge region () of the end region (),'}{'b': 2', '14', '12', '8, '(c) sealing the cylinder tube () in fluid-tight attachment by welding of an end piece () to the mounting region (), said end piece closing the opening () to be fluid-tight.'}21683026301216. The method according to claim 1 , in which with the cold forming process a driver edge () claim 1 , which surrounds the opening () for the cold forming process forming the blank () into the cylinder tube () claim 1 , is shaped on the end region () of the blank () claim 1 , and at least a part of the mounting region () is shaped as at least a part of the driver edge ().3122. The method according to claim 2 , in which the ...

Composite tube with a sacrificial layer for very thin wall heat exchangers

Composite tube assemblies and thin-walled tubing are disclosed. In embodiments, the composite tube assemblies include a functional tube and a sacrificial tube disposed within or around the functional tube. The sacrificial tube may be removed by exposure to a corrosive media, without substantially affecting the functional tube. Methods of forming composite tube assemblies and thin-walled tubing are also described.

Apparatus for calibrating and surfacing tubes

An improvement in a process and apparatus for internal finishing and calibrating tubes is provided in which the internal surface of the tube is sprayed during the work on the tube with at least one lubricating jet directed to the work zone ahead of the passage of the tool.

Method of manufacturing a ribbed pipe

FIELD: manufacturing technology.SUBSTANCE: invention relates to the field of production of ribbed pipes by cold drawing on a mandrel. Method for manufacturing finned tube (15), which has plurality of first spiral ribs (12) on the inner surface and the outer diameter is not more than 34 mm, includes the stage of preparation of a steel pipe with a tensile strength of not more than 600 MPa and a step of manufacturing the ribbed tube by cold drawing a steel pipe using mandrel (2) having plurality of helical grooves (21) and plurality of second spiral ribs (22), each of which is located between adjacent spiral grooves (21), while the mandrel parameters are governed by mathematical relationships.EFFECT: method makes it possible to avoid jamming of the mandrel during cold drawing.5 cl, 8 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 664 494 C1 (51) МПК B21C 37/20 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК B21C 37/20 (2006.01) (21)(22) Заявка: 2017122143, 24.11.2015 (24) Дата начала отсчета срока действия патента: Дата регистрации: 17.08.2018 25.11.2014 JP 2014-238171 (45) Опубликовано: 17.08.2018 Бюл. № 23 (56) Список документов, цитированных в отчете о поиске: JP 2005221153 A, 18.08.2005. SU (85) Дата начала рассмотрения заявки PCT на национальной фазе: 26.06.2017 202856 A, 12.12.1967. SU 1082504 A, 30.03.1984. SU 1650294 A1, 23.05.1991. (86) Заявка PCT: 2 6 6 4 4 9 4 R U (87) Публикация заявки PCT: WO 2016/084361 (02.06.2016) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр. 3, ООО "Юридическая фирма Городисский и Партнеры" (54) СПОСОБ ИЗГОТОВЛЕНИЯ РЕБРИСТОЙ ТРУБЫ (57) Реферат: Изобретение относится к области трубы с использованием оправки (2), имеющей производства ребристых труб холодным множество спиральных канавок (21) и множество волочением на оправке. Способ изготовления вторых спиральных ребер (22), каждое из которых ребристой трубы (15), которая имеет множество расположено между смежными ...

一种离心机用冷型毛坯锻造方法

本发明公开了一种离心机用冷型毛坯锻造方法，属于锻造技术领域，所述冷型毛坯采用锻造方法制备，具体步骤如下：A、预处理：将冶炼制得的钢锭切除冒口下料，然后在加热炉内加热至一定温度；B、镦粗和冲孔：将切除冒口下料的钢锭立料镦粗，镦粗比大于2.0，镦粗后采用冲头冲孔，得到冲孔坯料；C、扩孔和拔长：将冲孔坯料返回加热炉加热，温度提高40～50℃，进行扩孔和芯轴拔长，得到拔长坯料；D、锻造凹档：将拔长坯料通过锤头锻造出凹档，得到冷型毛坯，本发明制得的冷型毛坯组织更致密、均匀，使产品获得一定的强度和抗疲劳性能，满足质量及尺寸要求，达到改善锻件质量，延长使用寿命的目的。

Method and device for drawing

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Method of detecting preceding feature and apparatus for detecting preceding feature jump and method of producing cold pipe using the method of detecting preceding feature

FIELD: production of fittings. SUBSTANCE: invention relates to drawing pipes in cold state. Method involves a step of measuring the force applied to the rod to hold the mandrel in the direction of drawing and the stage of detection of preceding feature jump motion at the stage before the onset of discontinuous movement based on measuring the force values obtained at the stage of force measuring. At that stage of detection of the preceding feature includes a step of frequency analysis of values for measuring the force, obtained at the stage of changing forces in the specified frequency band, and a step of estimating the onset of the preceding feature jump motion when the peak intensity of the frequency spectrum, obtained by frequency analysis, exceeds preset reference value. EFFECT: increase of quality of pipe. 3 cl, 6 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 603 398 C2 (51) МПК B21C 1/24 (2006.01) B21C 51/00 (2006.01) G01H 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2014150875/02, 02.05.2013 (24) Дата начала отсчета срока действия патента: 02.05.2013 (72) Автор(ы): ХАНАДА, Такуя (JP) (73) Патентообладатель(и): НИППОН СТИЛ ЭНД СУМИТОМО МЕТАЛ КОРПОРЕЙШН (JP) Приоритет(ы): (30) Конвенционный приоритет: (43) Дата публикации заявки: 10.07.2016 Бюл. № 19 R U 16.05.2012 JP 2012-112342 (45) Опубликовано: 27.11.2016 Бюл. № 33 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 16.12.2014 2 6 0 3 3 9 8 (56) Список документов, цитированных в отчете о поиске: JP 10225712 A, 25.08.1998. WO 2013172208 A1, 21.11.2013. RU 2144442 C1, 20.01.2000. FR 2169906 A, 14.09.1973. SU 995958 A, 25.02.1983. (86) Заявка PCT: 2 6 0 3 3 9 8 R U C 2 C 2 JP 2013/062751 (02.05.2013) (87) Публикация заявки PCT: WO 2013/172208 (21.11.2013) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) СПОСОБ ОБНАРУЖЕНИЯ ПРЕДШЕСТВУЮЩЕГО ПРИЗНАКА И ...

Способ обнаружения предшествующего признака и устройство обнаружения предшествующего признака скачкообразного движения и способ волочения в холодном состоянии трубы или трубки с применением способа обнаружения предшествующего признака

1. Способ обнаружения предшествующего признака для обнаружения предшествующего признака скачкообразного движения в ходе волочения в холодном состоянии трубы или трубки волочильным станом, включающим в себя волоку, оправку, расположенную в волоке, и стержень для удерживания оправки, при этом способ обнаружения предшествующего признака скачкообразного движения содержит:этап измерения усилия для измерения усилия, прилагаемого к стержню для удерживания оправки в направлении волочения в ходе заданного периода от исходной точки измерения до конечной точки измерения после начала волочения; иэтап обнаружения предшествующего признака для обнаружения предшествующего признака скачкообразного движения на основе величин измерения усилия, полученных на этапе измерения усилия.2. Способ по п. 1, в котором на этапе обнаружения предшествующего признака осуществляют частотный анализ величин измерения усилия в заданной полосе частот, и осуществляют оценку того, что возник предшествующий признак скачкообразного движения, когда пиковая интенсивность частотного спектра, полученного посредством частотного анализа, превышает заданное опорное значение.3. Способ волочения в холодном состоянии трубы или трубки, в котором, когда предшествующий признак скачкообразного движения обнаружен посредством способа обнаружения предшествующего признака по п. 1 или 2, скорость волочения трубы или трубки волочильным станом снижают.4. Устройство обнаружения предшествующего признака для обнаружения предшествующего признака скачкообразного движения в ходе волочения в холодном состоянии трубы или трубки волочильным станом, включающее в себя во РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2014 150 875 A (51) МПК B21C 1/24 (2006.01) B21C 51/00 (2006.01) G01H 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2014150875, 02.05.2013 (71) Заявитель(и): НИППОН СТИЛ ЭНД СУМИТОМО МЕТАЛ КОРПОРЕЙШН (JP) Приоритет(ы): (30) Конвенционный приоритет: 16.05.2012 JP 2012- ...

Apparatus for detecting the sticking of metal on drawbench holder

Изобретение относитс  к обработке металлов давлением и может использоватьс  при холодном волочении высоколегированных марок сталей и сплавов. Цель изобретени  - обеспечение надежного определени  момента возникновени  налипани  металла на оправку. Это достигаетс  введением новых блоков и функциональных св зей, позвол ющих фиксировать незначительные изменени  осевых усилий на стержень оправки, возникающих в начальной стадии процесса налипани  металла на оправку, и исключить ложные срабатывани  в момент начала волочени . 4 ил. с (Л ОО ел оО5 00 The invention relates to the processing of metals by pressure and can be used during cold drawing of high alloy steels and alloys. The purpose of the invention is to provide a reliable determination of the moment of occurrence of metal sticking to the mandrel. This is achieved by introducing new blocks and functional connections, which allow to fix minor changes in axial forces on the mandrel bar, which arise in the initial stage of the metal sticking to the mandrel, and eliminate false alarms at the moment of the beginning of the drawing. 4 il. with (L OO ate oO5 00

Tube expanding method for manufacturing metal tube

내면 공구에만 의한 확관 제조에서는 종래, 제조 조건 결정에 시간을 필요로 하고, 비용도 들었다. 구체적으로는, 확관 가공 시뮬레이션에 의해 피가공재 (10) 선단이 공구 (1) 의 숄더부 (3) 를 통과하고 나서 1.0 m 이상 진행된 상태에 있어서의 피가공재 형상을 평가하고, 그 형상이 외경에서 목표의 ± 1 ％ 이내, 두께에서 목표의 ± 7.5 ％ 이내에 들어가고, 또한 공구와의 내면 간극이 1.0 ㎜ 이내가 되는 소관 형상 및 공구 형상을 반복 계산으로 구하여, 이것을 실제 확관 제조 조건으로 한다. Conventionally, in the manufacture of an expanded tube only by an inner tool, it takes time to determine the manufacturing conditions, and the cost is also high. Specifically, the shape of the material to be processed in a state in which the tip of the material to be processed 10 advances by 1.0 m or more after the tip of the material to be processed 10 passes through the shoulder portion 3 of the tool 1 is evaluated by expanding machining simulation, The tube shape and the tool shape which are within ± 1% of the target and within the range of ± 7.5% of the target from the thickness and whose inner gap between the tool and the tool is within 1.0 mm are obtained by iterative calculation.

tube drawing apparatus

본 발명에 따른 튜브 인발장치는 튜브의 축관을 위하여 점차적으로 작아지는 테이퍼부를 가지는 플러그와, 상기 플러그가 삽입되는 것으로 상기 테이퍼부와 대응되는 축관형성부와 상기 축관형성부로부터 연장되어 축관이 이루어진 튜브를 인출되는 튜브가이드부와 상기 튜브가이드부와 대응되는 측에 형성되어 상기 축관형성부로 인발을 위한 튜브의 인입을 가이드 하는 성형다이스부를 구비한 다이스와, 상기 다이스와 결합되는 플러그와 플러그의 외주면에 설치되어 자력을 이용하여 플러그를 회전시키는 플러그 회전유닛을 구비한다.

Patent DE3514316C2

Automatic machine for preparing the ends of metal pipes for drawing

Method for continuously rolling copper pipe by planetary pipe mill

本发明涉及一种行星轧管机连续轧制铜管的方法，其特征在于：辊式送进机或者履带式送进机置于三辊行星轧管机入口，所述辊式送进机或者履带式送进机被三辊行星轧管机轧制的管坯带动呈被动旋转状态，所述辊式送进机或者履带式送进机被动旋转的同时连续不断给管坯提供送进力，将管坯逐根头尾相接连续不断送入三辊行星轧管机进行轧制。采用上述技术方案，结构简单、可靠、实用，满足连续轧制铜管的需要，避免了现有技术的不足，提高了生产效率。

Drawing device for pipe

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Process for producing a multilayer pipe having a metallurgical bond by drawing, and multilayer pipe produced by this process

본 발명은 금속 재료로 적어도 하나의 외부파이프(10) 및 외부 파이프 내에 배치된 금속 재료인 하나의 내부 파이프(20), 그들의 계면의 적어도 일부에 내부 파이프(20)의 외부 표면에 기계적으로 본딩된 외부 파이프(10)의 내부 표면을 포함하는 관형 요소로부터 다층 파이프(1)를 생산하기 위한 프로세스에 관한 것이며, 생산 라인에서, 관형 요소는 동시에 가열되고 드로잉되며(drawn), 여기서 관형 요소의 각 부분은 유도에 의하여 가열되어 열간 드로잉되며 상기 관형 요소는 동시에 그것의 내부에 위치된 맨드렐로 드로운된다. 이 프로세스를 통해서, 파이프사이에 존재하는 기계적 연결은 메탈로직칼 본드으로 변환된다. 본 발명은 이 프로세스에 의하여 생산된 다층 파이프에 관한 것이며, 여기서 외부 파이프(10)는 타소 망간 철로 제조되고 내부 파이프는 내부식성 합금으로 제조된다. The present invention relates to at least one outer pipe 10 of a metallic material and one inner pipe 20 which is a metallic material disposed within the outer pipe, mechanically bonded to the outer surface of the inner pipe 20 at at least a portion of their interface. It relates to a process for producing a multilayer pipe (1) from a tubular element comprising an inner surface of an outer pipe (10), wherein in a production line, the tubular element is simultaneously heated and drawn, wherein each part of the tubular element The silver is heated by induction and hot drawn and the tubular element is simultaneously drawn into a mandrel positioned therein. Through this process, the mechanical connections existing between the pipes are converted into metal-logic bonds. The present invention relates to a multi-layer pipe produced by this process, wherein the outer pipe 10 is made of corrosive manganese iron and the inner pipe is made of a corrosion-resistant alloy.

BRIGHT-ANNEALED HIGHLY SMOOTH INNER SURFACE STAINLESS STEEL PIPE AND METHOD OF MANUFACTURING THE SAME

본 발명은 광휘소둔 사상형 내면 고평활 스테인레스 강관은, 내면조도가 R max 에서 1.0㎛ 이하인 것을 특징으로 하고, 반도체 제조장치용의 클린파이프등으로 적합하다. 본 발명의 제조방법에 의하면, 내면 고평활 스테인레스 강관을 냉간 인발하여 광휘열처리의 그대로 얻을 수 있다. 이것에 의해, 종래 필수로 되어 있던 전기화학연마등의 처리를 생략할 수도 있으며, 제조코스트를 대폭으로 저감시키는 것이 가능해지고, 반도체 제조분야등에서 널리 이용할 수 있다.

Processing device for high-performance stainless steel seamless steel pipe

本发明公开了一种高性能不锈钢无缝钢管的加工装置，包括钢管冷拔加工装置本体，所述钢管冷拔加工装置本体包括从左至右依次布设的动力装置、拉动装置、模具装置以及备料架，所述拉动装置包括链条和轨道，链条上设有小车，所述小车包括车体，所述车体上设有拉钩，所述车体上还设有内管拉动组件。该加工装置通过设计了内管拉动组件以替代夹钳对无缝钢管的端头进行装夹，内管拉动组件可以通过模具装置，因此内管拉动组件在拉动无缝钢管时不需要预先对无缝钢管的端头进行缩小加工，可以维持无缝钢管原有的形状，并保持了无缝钢管整体形状的完整性，不会产生废料，对于生产来讲是非常有利的。

Patent DE3405641C2

Method to produce a plug chamber for cascade drawing of tubes and device for carrying out the method

Method for producing an internally structured plain bearing bush

Die Erfindung betrifft ein Verfahren zur Herstellung einer innenstrukturierten Gleitlagerbuchse (1), welches folgende Schritte umfasst: a) Bereitstellen einer Gleitlagerbuchse (1) mit mindestens einem Lagerbereich (10), der als Hohlzylinder mit einer Innenoberfläche gebildet ist und der einen Außendurchmesser und einen Innendurchmesser aufweist, b) Bereitstellen eines Außenwerkzeugs (2) mit einer Durchgangsöffnung (20), deren kleinster Innendurchmesser kleiner ist als der Außendurchmesser des Lagerbereichs (10) der bereitgestellten Gleitlagerbuchse (1), wobei die Durchgangsöffnung (20) mindestens auf einer Seite eine konische Erweiterung (201) aufweist, deren maximaler Innendurchmesser größer als der Außendurchmesser des Lagerbereichs (10) der bereitgestellten Gleitlagerbuchse (1) ist, c) Bereitstellen eines Innenwerkzeugs (3) (in Form eines Kalibrierstempels), welches einen einstückigen, zylindrischen Arbeitsbereich (30) mit einer Außenoberfläche mit einer Struktur (31) aufweist, wobei der maximale Außendurchmesser des Arbeitsbereichs (30) kleiner ist als der Innendurchmesser des Lagerbereichs (10) der bereitgestellten Gleitlagerbuchse (1), d) Einführen des Innenwerkzeugs (3) in den Lagerbereich (10) der Gleitlagerbuchse (1), e) Einbringen der Gleitlagerbuchse (1) und des Innenwerkzeugs (3) in die konische Erweiterung (201) der Durchgangsöffnung (20) des Außenwerkzeugs (2), f) Einpressen der Gleitlagerbuchse (1) in die Durchgangsöffnung (20) des Außenwerkzeugs (2) unter Reduktion des Außen- und Innendurchmessers des Lagerbereichs (10) der Gleitlagerbuchse (1), so dass die Innenoberfläche des Lagerbereichs (10) auf die Außenoberfläche des Innenwerkzeugs (3) gepresst wird und in die Innenoberfläche des Lagerbereichs (10) eine Innenstruktur (11) als Negativform der Struktur (31) der Außenoberfläche des Innenwerkzeugs (3) eingeprägt wird, g) Entfernen der Gleitlagerbuchse (1) aus der Durchgangsöffnung (20) des Außenwerkzeugs (2), h) radiales Aufweiten der ...

Clad pipe manufactured by the manufacturing method, and clad pipe connected by the connecting method

The present invention relates to a method for manufacturing a clad pipe which manufactures a clad pipe, wherein inner and outer pipes of different metallic materials are coupled by drawing, and firmly connects the manufactured clad pipes; a clad pipe manufactured by the same; and a method for connecting the clad pipes. According to the present invention, a method for manufacturing a clad pipe includes steps of: preparing an outer pipe of carbon steel or stainless material; inserting the outer pipe into a first drawing mold to longitudinally form a plurality of coupling grooves on an inner circumferential surface of the outer pipe in equidistant intervals by drawing; preparing an inner pipe formed with metallic material different from the material of the outer pipe, and being inserted inside the outer pipe; and manufacturing a dual pipe by inserting the inner pipe inside the outer pipe, and forming coupled protrusion portions inserted and coupled to the coupling grooves on an outer circumferential surface of the inner pipe by inserting the outer pipe and the inner pipe into a second drawing mold to compress the inner circumferential surface of the inner pipe toward the outside to be expanded by drawing.

Cold-type blank forging method for centrifugal machine

本发明公开了一种离心机用冷型毛坯锻造方法，属于锻造技术领域，所述冷型毛坯采用锻造方法制备，具体步骤如下：A、预处理：将冶炼制得的钢锭切除冒口下料，然后在加热炉内加热至一定温度；B、镦粗和冲孔：将切除冒口下料的钢锭立料镦粗，镦粗比大于2.0，镦粗后采用冲头冲孔，得到冲孔坯料；C、扩孔和拔长：将冲孔坯料返回加热炉加热，温度提高40～50℃，进行扩孔和芯轴拔长，得到拔长坯料；D、锻造凹档：将拔长坯料通过锤头锻造出凹档，得到冷型毛坯，本发明制得的冷型毛坯组织更致密、均匀，使产品获得一定的强度和抗疲劳性能，满足质量及尺寸要求，达到改善锻件质量，延长使用寿命的目的。

Tube reducing apparatus and method

A kind of seamless rectangular steel pipe forming device and forming method

本发明公开了一种无缝矩形钢管成型装置及成型方法，该装置包括定型芯块、滚压单元、定位单元和拉拔单元，定型芯块由定型段以及位于其两端的倒角段和倒锥段组成；滚压单元包括第一基座、四个滚轮和机架，四个滚轮可转动安装在机架上，四个滚轮两两正对的圆周面合围形成矩形模孔以同时利用四个滚轮转动的圆周面对坯管从四个方向进行滚压；定位单元和拉拔单元分别位于矩形模孔的前后侧，定型芯块的定型段设于矩形模孔内，定型芯块的倒锥段通过固定杆与定位单元固定连接以将定型芯块固定；拉拔单元与坯管一端固定连接；矩形模孔中心线、定型芯块中心线、拉拔单元中心线和定位单元中心线位于同一直线。该装置减少了对坯管的损害，能有效提高加工效率。

Mandrel tube drawing bench

Tubes, esp. small dia. tubes are drawn using a mandrel on a bench having three levels for drawing, deformation and stripping. The tube and mandrel pass from the first to the third by gravity and the mandrel is returned to the first level by an elevator. The stripping level may have means for rolling the slightly deformed tube back to true.

Coil shaped pure nickel pipe manufacturing method for liquid crystal back light, involves reducing outer diameter of annealed pipe and winding pipe into coil shaped pipe

L'invention propose un procédé pour produire un tube de nickel pur spiralé selon la présente invention est caractérisé en ce qu'il comporte les étapes de formage du tube, au cours de laquelle une bande de nickel pur est enroulée dans une direction perpendiculaire à la longueur de la bande pour créer une configuration cylindrique ayant une section transversale circulaire et dont les bords jointifs sont alors soudés ensemble pour obtenir un tube spiralé ayant un diamètre externe et une épaisseur prédéterminés, de semi recuit dans laquelle le tube spiralé est soumis à un recuit en le chauffant de manière continue dans une atmosphère réductrice chauffée à une température allant de 650 degres C à 750 degres C et est enroulé sous la forme d'un tube spiralé, et d'étirage au cours de laquelle au moins un diamètre externe du tube recuit est réduit en taille puis alors enroulé sous la forme d'un tube spiralé.

Mandrel for tube drawing

Process for rolling pipes used as pipe blanks for oil fields

Pipe draw bench using long mandrel - has auxiliary production line parallel and connection to main one

The draw bench draws pipe using a long mandrel, having a production line containing in succession a loading table, a mechanism thrusting the mandrel and the blank through the drawing die, a roller conveyor and a receiving table. Parallel to the main production line (1) is an auxiliary one (2), in which the drawing direction is the opposite way. This is connected to the main one by transfer conveyors (11,12) so arranged that the inlet and outlet of the one line are connected respectively to the outlet and inlet of the other.

Method of forming a variable wall light weight axle shaft with friction welded flange

A method for forming a lightweight axle shaft is provided. A first tubular blank is inserted in a die defining an extrusion throat at one end. A tool is inserted into the die having a mandrel with portions of increasing diameter. The tool is moved towards the outlet end of the die to partially extrude the blank through the extrusion throat and form a hollow axle shaft having a variable inner diameter based on the varying diameter of the mandrel. The tool is then removed and a second tubular blank is inserted and placed in engagement with the first blank. The tool, or a different tool, is inserted into the die and again moved towards the outlet end of the die to complete extrusion of the first blank and produce a shaft having diameters at each end that are less than the diameter of an intermediate portion of the shaft.

Device for drawing pipes

Patent FR2350895B1

SOUND ALARM PROVIDING DEVICE FOR OUTBOARD MOTOR

VOICE ALARM FOR OUTBOARD MOTOR

La présente invention concerne un agencement d'alarme vocale comprenant une pluralité de détecteurs incluant un détecteur 423 qui détecte une anomalie dans l'eau de refroidissement et un détecteur 428 qui détecte une anomalie dans un niveau d'huile, caractérisé en ce qu'il comprend en outre un circuit d'émission vocale 300 auquel la sortie de chacun des détecteurs est couplée et qui présente des anomalies détectées sous forme vocale, le circuit d'émission vocale 300 comprenant des moyens pour fournir les sorties à partir de la pluralité de détecteurs dans un ordre de priorité prédéterminé, et des moyens pour traiter des signaux de détection fournis par les détecteurs selon un ordre de priorité prédéterminé et pour présenter chaque anomalie détectée sous forme vocale en tant qu'alarme. The present invention relates to a voice alarm arrangement comprising a plurality of detectors including a detector 423 which detects an anomaly in the cooling water and a detector 428 which detects an anomaly in an oil level, characterized in that it further comprises a voice transmission circuit 300 to which the output of each of the detectors is coupled and which exhibits anomalies detected in voice form, the voice transmission circuit 300 comprising means for supplying the outputs from the plurality of detectors in a predetermined priority order, and means for processing detection signals supplied by the detectors in a predetermined priority order and for presenting each detected anomaly in voice form as an alarm.

Expansion of tube inside diameter - using a mandrel, with a die drawn over the outside to maintain outside diameter

Process for increasing the inside dia. on the end of a tube in which the tube is inserted through a die and then on to a mandrel which moves into the tube to expand it. By relative movement between die and mandrel the die is withdrawn over the mandrel and tube end, drawing the latter on to the mandrel. Used e.g. to mfr. steering column bearing by cheap process giving improved precision.

Method and apparatus for mixing fluids

Method and apparatus for hot shrinking tubes

Process for working metal and products obtained by this process

Drawing of metal tube of tapering wall thickness - uses conical drawing plate insert which is advanced as tube is drawn to produce tennis racket shaft

The process for drawing metal tube of tapering wall thickness (13b) uses a tapered or stepped drawing plate insert (6), with the relative axial disposition of the drawing plate (4) and insert (6) subject to controlled adjustment. The method may be applied to the prodn of tubular metal tennis racket shafts, and obviates electrolytic tapering. The drawing plate (4) and the insert (6) are mounted on a drawing bed with a traction carriage pulling the leading end of the tube (5), the insert anchored to the bed beyond the trailing rube end, and the drawing plate in an intermediary position. The insert may comprise a rod (7) which fits inside the tube (5) and has a part-conical or step diametered nose. The drawing plate (4) may be mounted in a cage holder (3) on a slide. The slide and thus the drawing plate may be displaced axially by a jack operated lever cam. Micrometers may be deployed to monitor resultant wall thickness, and the variation in wall thickness is effected by progressively advancing the insert (6) as the tube (5) is drawn.

METHOD AND APPARATUS FOR MANUFACTURING TUBES OF PRECISE DIMENSIONS

Advanced tube, its manufacturing process and its various applications

A tube structure and a method for manufactoring a tube structure

The present disclosure relates to a tube structure comprising an inner tube of metal and an outer tube of metal, wherein the inner tube extends in the outer tube, and wherein either the inner tube and the outer tube are mechanically tight fitted over the entire length of the inner tube, at least one space in a radial direction of the tube structure in the form of a groove extends at least in an outer surface of the inner tube or in an inner surface of the outer tube, and the at least one space extends in a longitudinal direction of the inner tube and over an entire longitudinal extension of the inner tube, or a spacer tube is located between the inner tube and the outer tube, the inner tube, the outer tube and the spacer tube are mechanically tight fitted over the entire length of the spacer tube, the spacer tube comprises at least one space in the form a slit extending in a radial direction of the tube structure from an outer surface of the inner tube to an inner surface of the outer tube, the at least one space extends in a longitudinal direction of the spacer tube and over an entire longitudinal extension of the spacer tube, and wherein the at least one space is at least partially filled with a thermal interface material providing a thermal contact between the outer tube and the inner tube.

Manufacture of metal tubes

The manufacture of seamless tubes in which the process includes providing an assembly having a metal tube blank (1), and an elongate metal core (2) of shape memory effect material which is surrounded and contacted by the tube blank (1) with a minimal gap. The assembly is elongated by mechanical working thereof at an elevated temperature until the tube blank (1) has been converted into a tube of desired dimensions. After the elongation step, the core (12) is subjected to a treatment which results in the core being in a stretched condition throughout its length, and does not substantially stretch the tube (11). The core is removed from the tube, and subsequently subjected to drawing passes over a nondeformable mandrel thereby refining the precision of diametric and wall dimensions with improved ID and OD surface quality. There is also decoring and reinserting to improve final dimensions which results in the ability to fabricate smaller, longer tubes (111).

Improvements in and relating to the drawing of metal tubing

1,137,715. Drawing tube. MARSHALL RICHARDS MACHINE CO. Ltd. 4 May, 1966 [5 May, 1965], No. 18915/65. Heading B3P. A method of cold-drawing metal tubing 1 through a die 2 is characterized in that the plug 4 which floats in the bore of the tubing during the drawing process has at least one air passage 7 through it. The passages are all parallel to the axis of the tubing and each has a flexible tube 8 at the end 6 of the plug to allow the air to flow past the lubricant 9. Alternatively, the end 6 of the plug may have an annular recess which retains the lubricant. The passages preferably have circular cross-section but may be star-shaped and may have radial fins. The passage of air in the direction B through the plug as the tubing is fed through the die serves to cool the plug.

A manufacturing method of a rifle tube

a presente invenção refere-se a um método de produção de um tubo raiado com o qual a ocorrência de emperramento devido à estampagem a frio pode ser suprimida. o método de produção para produzir um tubo raiado (15), que inclui uma pluralidade de primeiras nervuras helicoidais (12) em sua superfície interna e tem um diâmetro externo de não mais que 34 mm, inclui: uma etapa de preparação de um tubo de aço que tenha uma resistência à tração de não mais que 600 mpa; e uma etapa de produção de um tubo raiado pela execução de uma estampagem a frio em um tubo de aço usando-se um plugue (2) que inclui uma pluralidade de ranhuras helicoidais (21) e uma pluralidade de segundas nervuras helicoidais (22) cada uma localizada entre as ranhuras helicoidais adjacentes (21), o plugue satisfazendo as fórmulas (1) e (2): 0,08 < w ¿ (a - b) ¿ n/(2¿ ¿ a) < 0,26 (1) 0,83 < s ¿ (a - b) ¿ n/(2 ¿ m) < 2,0 (2) em que w é a largura (mm) da superfície do fundo da ranhura (210) da ranhura helicoidal (21) em uma seção transversal perpendicular ao eixo central do plugue; a é o diâmetro máximo (mm) do plugue (2); b é o diâmetro mínimo (mm) do plugue (2) na mesma seção transversal que a do diâmetro máximo; n é o número de segundas nervuras helicoidais (22) na seção transversal; s é a largura (mm) da superfície de fundo da ranhura (210) na seção longitudinal do plugue; e m é o passe (mm) das segundas nervuras helicoidais adjacentes (220) na seção longitudinal. the present invention relates to a method of producing a striped tube with which the occurrence of jamming due to cold stamping can be suppressed. the production method for producing a streaked tube (15), which includes a plurality of first helical ribs (12) on its internal surface and has an outside diameter of no more than 34 mm, includes: a step of preparing a tube steel that has a tensile strength of no more than 600 mpa; and a step of producing a streaked tube by performing a cold stamping on a steel tube using a plug (2) that ...

Method and apparatus for elongating metal articles

Method of manufacturing driving shaft

드라이브 샤프트의 제조 방법은 제1 강도를 갖는 금속관의 일측을 축관시켜 제1 샤프트부를 형성하는 단계; 상기 제1 샤프트부와 일체로 형성된 상기 금속관의 중앙부를 인발하여 상기 중앙부의 두께를 감소시키는 인발 단계; 상기 금속관의 상기 일측과 대향 하는 타측의 내측면을 일정 길이로 열처리하여 상기 금속관의 상기 타측의 내측면에 상기 제1 강도보다 낮은 제2 강도를 갖는 강도 감소부를 형성하는 단계; 및 상기 강도 감소부가 형성된 상기 금속관을 축관 시켜 상기 중앙부의 형상 변형 없이 제2 샤프트부를 형성하는 단계를 포함하며, 상기 제2 샤프트부는 상기 금속관 중 상기 강도 감소부가 형성된 부분을 상기 금속관의 축 방향과 수직한 방향으로 압축력을 가하여 형성된다. A manufacturing method of a drive shaft includes the steps of forming a first shaft portion by axially inserting one side of a metal pipe having a first strength; Drawing a central portion of the metal tube integrally formed with the first shaft portion to reduce a thickness of the central portion; Forming a strength reducing portion having a second strength lower than the first strength on an inner surface of the other side of the metal tube by heat treating the other side of the metal tube opposite to the one side with a predetermined length; And forming a second shaft portion without deforming the shape of the center portion by shrinking the metal tube having the strength reducing portion formed therein, wherein the second shaft portion includes a portion of the metal tube in which the strength reducing portion is formed, And is formed by applying a compressive force in one direction.

Patent JPH046447B2

PROCEDURE AND DEVICE FOR MANUFACTURING MOLDS FORMED OF METAL TUBES, TO BE USED IN CONTINUOUS CASTING MACHINES FOR BILETTE AND BLUMI

Methods and apparatus for manufacturing tubular products from tubular blooms

1,116,901. Making seamless tubes; drawing tubes; expanding tubes. G. A. MITCHELL. 23 June, 1965, No. 26663/65. Headings B3A, B3J and B3P. A method of making a drawn tubular product from a tubular bloom includes the steps of expanding the bloom 14 around and along its axis of generation, excluding one axial end portion thereof, inserting said excluded end portion through a die aperture 12 sized intermediate said excluded and expanded bloom portions, and then drawing the remainder of the bloom through the die aperture. The bloom 14 is initially supported by clamps 16 and is expanded by a tapered plug 20 which is forced into bore of the bloom 14 by a push rod 22, axial movement of the bloom being prevented by a stop plate 18 positioned between the die 12 and the bloom. When the plug 20 has expanded the majority of the length of the bloom the stop plate is removed and further movement of the push rod 22 causes the unexpanded end portion of the bloom to pass through the die 12. This end portion is then gripped by the draw carriage 28 and the bloom is drawn through the die 12, the plug 20 remaining in the bore in the bloom and acting as a floating mandrel. This work cycle may be repeated using a larger plug 20 until the desired wall thickness is reached. The push rod 22, which is mounted on a push carriage 24, and the draw carriage 28 are both operated by a hydraulic piston and cylinder 32 acting through cables 48 and 66. The draw carriage 28 and push carriage 24 move in unison towards and away from the die 12 by means of a cable connection 58.

Front bench for mandrel bar puller

Patent DE3523044C2

AUTOMATIC MANDREL INSERTION APPARATUS FOR TUBE DRAWING INSTALLATION.

L'invention concerne un appareil automatique d'insertion de mandrin pour une installation d'étirage de tubes. Cet appareil comporte un mandrin (2) fixé à l'extrémité d'une tige de support de mandrin (1); un galet support (4) pour supporter le dessous d'une partie intermédiaire de la tige, ledit galet étant librement mobile parallèlement à l'axe de la tige; un dispositif transporteur de tube (5) pour déplacer un tube brut (6) devant être étiré, vers la tige dont l'axe est dans l'alignement de l'axe du tube, ledit dispositif serrant les deux extrémités du tube dans lequel le mandrin est inséré; et des moyens poussoirs (57) fixés au dispositif, qui poussent le galet vers une extrémité fixe de la tige avant que l'extrémité avant du tube n'aille au-delà du galet. Cet appareil permet d'éviter les rayures sur la surface du tube et l'usure par frottement de celle du mandrin. The invention relates to an automatic mandrel insertion apparatus for a tube drawing installation. This apparatus comprises a mandrel (2) fixed to the end of a mandrel support rod (1); a support roller (4) for supporting the underside of an intermediate part of the rod, said roller being freely movable parallel to the axis of the rod; a tube conveyor device (5) for moving a raw tube (6) to be stretched, towards the rod whose axis is in alignment with the axis of the tube, said device clamping the two ends of the tube in which the mandrel is inserted; and pushing means (57) attached to the device, which pushes the roller towards a fixed end of the rod before the front end of the tube goes beyond the roller. This device prevents scratches on the surface of the tube and wear by friction of that of the mandrel.

Blank tube for cold drawing and method for producing the same, and method for producing cold drawn tube

Disclosed is a blank tube for cold drawing which is used for the production of a longer-length, small-diameter tube such as a heat-transfer tube for as steam generator in nuclear power facilities, in which the blank tube will not cause scoring and chattering vibration in a drawing process; and a method for producing the blank tube; as well as a method for producing a cold drawn tube which is obtained through cold drawing of the blank tube. The average surface roughness Ra (ANSI B46.1) of the inner surface of blank tube before drawing satisfies the condition: 0.10 µm <= Ra <= 1.00 µm in the case of a blank tube for cold drawing for use in an oil-lubricated drawing. In particular, the surface roughness Ra satisfies the condition: 0.10 µm <= Ra <= 0.50 µm in the case of a blank tube for use in a high-pressure lubrication drawing, and which is made of an austenitic alloy for use in a heat-transfer tube for a steam generator.

Apparatus and method for forming internally ribbed or rifled tubes

A plug tool for forming internally helically ribbed tube comprises a plug body for being rotatably disposed in a die orifice of a drawing die. The plug body has a central longitudinal axis, a plurality of external grooves equally spaced about the axis and a plurality of external lands in alternating arrangement with the grooves. The grooves extend along the plug body at a helix angle to the axis. Each groove has a normal cross-section defined by a root surface and opposing flank surfaces extending angularly outwardly from the root surface to adjacent land surfaces. The flank surfaces extend angularly outwardly from the root surface in opposite directions at different angles from one another. A method for forming internally helically ribbed tube involves drawing a length of tubing over the plug body rotatably disposed in a die orifice of a drawing die and constricting the tubing in the drawing die to force the tubing into the grooves of the plug body to form a plurality of internal helical ribs in the tubing in correspondence to the grooves.

Floating plug for drawing of tubes

A draw tool and process for producing internally finned copper tubing in which the draw tool has longitudinally extending exterior teeth and grooves having working surfaces that are shaped at interacting angles providing metal flow at tensile forces below the ultimate tensile strength of the tubing.

Method for preparing a thick-walled, stamped or cast tubular blank.

Method for producing ultra thin wall metallic tube with cold working process

An exemplary embodiment of the invention provides a method for producing an ultra thin wall metallic tube by cold working method with significant wall thickness reduction. In a method for producing the metallic tube with a cold pilger mill according to the invention, cold rolling is performed while tube diameters are being expanded using rolls having tapered groove dies whose calibers increase from an engaging entry side toward a finishing exit side. In a method for producing the metallic tube with a drawing machine according to the invention, cold drawing is performed while the tube diameters are being expanded using a solid die whose calibers increase from an engaging entry side toward a finishing exit side and a plug of a tapered mandrel bar whose diameters increase from an entry side of the die toward an exit side. In the metallic tube producing method, a maximum diameter of the plug or tapered mandrel bar may be larger than an outside diameter of the mother tube.

VOICE ALARM FOR OUTBOARD MOTOR

Method and apparatus for manufacturing moulds formed of metal tubes, to be used in continuous casting machines for billets and blooms

The present invention relates to a method and apparatus for manufacturing moulds which are circular arc type. A tubular blank 10 is bent into an arched form by means of a die 3, 4 conforming to the outer dimensions of the desired tube mould, and a plug 11 is drawn in an expanding draw through the tubular blank so that the path of motion of the plug is arched, which operation causes the outer surface of the tubular blank to be pressed against the die and the inner surface of the mould to be cold-worked to match the dimensions of the plug.

Manufacture of drawn pipe

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Method of drawing weldless tubes

CONTINUOUS MANUFACTURING OF LARGE LENGTH TUBES

Improvements in or relating to hard metal mandrels for drawing metal tubes

473,748. Drawing-mandrels. NAAMLOOZE VENNOOTSCHAP WALLRAMIT HANDEL MAATSCHAPPIJ March 15, 1937, No. 7583. Con vention date, March 27, 1936 [Class 83 (iv)] A mandrel for drawing meta tubes comprises a hard metal ring 1 mounted on a carrier 2 having a divergent conical head which engages a similarly shaped bore in the ring, the carrier being passed through the ring until the head contacts the bore. A union member 3 engages the carrier by screw-threads 5 and the mandrel shaft by screw-threads 7.

WANT TO CONTINUOUSLY DRAW A WHEEL WITH A STOP

Installation for shaping tubes

Tool for drawing tubes

Изобретение относитс  к производству труб волочением на полой короткой неподвижной оправке. Цель изобретени  - повышение стойкости инструмента. Инструмент содержит полую короткую оправку 1, через отверстие которой пропущен болт 2 и закреплен в торце стержн  3, например, посредством резьбового соединени . При этом отверстие оправки и расположенна  в нем поверхность болта выполнены коническими, сужающимис  в сторону стержн  3 с углами конусности в пределах 1-3°. Угол конусности отверсти  оправки на 10-20% меньше угла конусности поверхности болта, а величина микротвердости материала болта составл ет 35-60% величины микротвердости материала оправки. 1 ил. This invention relates to the manufacture of pipes by drawing on a hollow, short, fixed mandrel. The purpose of the invention is to increase tool life. The tool contains a hollow short mandrel 1, through the opening of which the bolt 2 is passed and fixed to the end of the rod 3, for example, by means of a threaded joint. In this case, the hole of the mandrel and the bolt surface located therein are made conical, tapering towards the rod 3 with taper angles of 1-3 °. The taper angle of the mandrel hole is 10-20% less than the taper angle of the bolt surface, and the microhardness value of the bolt material is 35-60% of the microhardness value of the mandrel material. 1 il.

Lined alloy tubing and process for manufacturing the same

A tube for a cracker unit in which ethylene is produced withstands, without oxidizing or losing its strength, the elevated temperatures required to effect cracking, yet retards coking. The tube has a shell formed from stainless steel or high nickel alloy and a liner formed from an iron-aluminum alloy. The liner retards the deposit of carbon and its build up known as coking. To form the tube, a high alloy ingot is bored to provide a bore that extends through its center. Then a weld overlay is applied to surface of the bore, with the overlay being derived from a weld metal containing at least 16% aluminum and the balance essentially iron. Thereafter, the ingot is heated to its hot working temperature and extruded through sets of opposed rollers, with the direction of advance being in the direction of the bore. The extruding transforms the ingot into a lined tube.

Voice alarm output device for outboard motor

Abstract of the Disclosure An alarm device for use with two engines, typically a pair of outboard motors attached to a boat is described. Each engine is provided with at least one sensor adapted to detect an abnormal condition, such as cooling water flow or oil temperature. The sensor output(s) are used as the input to a pair of warning devices, one for each engine, which typically will use a voice synthesizer to provide an audible warning. An output display is also provided, which is both able to indicate in which motor the abnormality has been detected, and also to discriminate between abnormality outputs arriving closely together from both engines. The audible warning for the second output to arrive is delayed until the warning for the first to arrive has been completed.

Process for the continuous production of very long precision tubes

Vocal alarm for outboard engine

Profile forming

Sign detection method and sign detection device for stick-slip phenomenon, and cold-drawing method for pipe using this advance detection method

(과제) 스틱 슬립 현상의 전조를 검출하는 전조 검출 방법을 제공한다. (해결 수단) 전조 검출 장치(6)는, 추신기(1)에서의 스틱 슬립 현상의 전조를 검출한다. 전조 검출 장치(6)는, 플러그 지지봉(4)에 걸리는 추신 방향의 하중을 측정하는 하중 측정부(61)와, 하중 측정부(61)가 측정한 하중 측정치에 의거하여 스틱 슬립 현상의 전조를 검출하는 전조 검출부(62)와, 제어부(63)를 구비하고 있다. 추신을 개시한 후에, 미리 정한 측정 개시 시점에서부터 측정 종료 시점까지의 동안에, 플러그 지지봉(4)에 걸리는 추신 방향의 하중을 하중 측정부(61)에 의해서 측정하고, 측정한 하중 측정치에 의거해 전조 검출부(62)에 의해서 스틱 슬립 현상의 전조를 검출한다.