УСТРОЙСТВО И СПОСОБ ОБРАБОТКИ БЕЗ СНЯТИЯ СТРУЖКИ ДЛЯ ОБРАЗОВАНИЯ НАРУЖНОГО ПРОФИЛЯ НА ЗАГОТОВКЕ

Изобретение относится к устройствам и способам образования наружной резьбы на заготовке без снятия стружки. Устройство содержит профилирующий инструмент, расположенный напротив фиксирующего элемента. Профилирующий инструмент и фиксирующий элемент выполнены с возможностью подачи на врезание относительно друг друга и установки в неподвижное положение, в котором заготовка может быть введена и извлечена между профилирующим инструментом и фиксирующим элементом по касательным к ним. Профилирующий инструмент содержит профиль без шага и выполнен с возможностью позиционирования напротив продольной оси заготовки при регулируемом угле наклона профилирующего инструмента в зависимости от требуемого углового шага образуемой наружной резьбы. В результате обеспечивается возможность обработки заготовки, недоступной с обоих ее концов. 3 н. и 10 з.п. ф-лы, 3 ил.

СПОСОБ КОНТРОЛЯ ДЛИНЫ НАКАТКИ РЕЗЬБЫ ВИНТА

Изобретение относится к области обработки металлов давлением, а именно к производству винтов, и может быть использовано на станах для накатки наружных резьб. Осуществляют поштучную загрузку заготовок в желоб и продольное перемещение зубчатой рейки для установки ее переднего конца на расчетное расстояние относительно торца заготовки. Затем подают заготовку во вращающиеся и сведенные в размер резьбонакатные валки, осуществляют накатку резьбы на заготовке до упора ее торца в торец зубчатой рейки и обеспечивают выталкивание посредством зубчатой рейки накатанного винта в желоб и сброс его в приемную кассету. При этом зубчатая рейка кинематически связана с зубчатым колесом электропривода ее продольного перемещения. Зубчатое колесо связано с датчиком импульсов, который включен в электрическую схему управления, содержащую контроллер. Скорость движения рейки изменяют посредством частотного преобразователя, подключенного к электроприводу. В результате расширяются технологические возможности способа ...

СПОСОБ НАКАТЫВАНИЯ НАРУЖНЫХ РЕЗЬБ

Изобретение относится к технологии машиностроения, в частности к способам формообразования наружных резьб пластическим деформированием - накатыванием резьбонакатной самораскрывающейся головкой. Задача изобретения - расширение технологических возможностей накатывания широкого диапазона наружных резьб, повышение их качества и снижение себестоимости. Способ включает сообщение детали вращения, а инструменту - возвратно-поступательной продольной подачи. В качестве инструмента используют самораскрывающуюся головку, содержащую корпус и хвостовик, причем корпус свободно вращается на хвостовике, имеет на внутренней поверхности отверстия участок с левой резьбой и участок с правой резьбой и снабжен размещенным на каждом из участков диском, имеющим внутренние конические поверхности, радиальные пазы. Диски подвижно соединены с хвостовиком и друг с другом с помощью штырей. Инструмент-головка содержит не менее трех резьбонакатных роликов, имеющих возможность радиального перемещения, установленных на осях ...

УСТРОЙСТВО ДЛЯ НАКАТЫВАНИЯ КРУПНЫХ НАРУЖНЫХ РЕЗЬБ

Изобретение относится к технологии машиностроения, к устройствам для формообразования наружных резьб пластическим деформированием, в частности к накатыванию наружных резьб средних и крупных размеров в заготовках из высокопластичных материалов. Задача изобретения – обеспечение возможности накатывания прямоугольных, трапецеидальных и других резьб, повышение производительности и качества обработки резьбовых поверхностей. Устройство снабжено резьбонакатными роликами и пуансонами, при этом резьбонакатные ролики в количестве не менее трех соединены между собой жесткой кинематической связью и получают принудительное вращение. Ролики имеют многозаходную резьбу с профилем, соответствующим профилю накатываемой резьбы, а пуансоны в количестве двух штук снабжены подпятниками на упорных подшипниках и воздействуют на торцы заготовки навстречу друг другу, деформируя ее. Один из пуансонов является плавающим упором, позволяющим компенсировать осевое перемещение заготовки. Диаметр резьбонакатных роликов ...

СТАНОК ДЛЯ ФОРМИРОВАНИЯ ПАЗОВ С ПОМОЩЬЮ КУЛАЧКОВ СО СТОПОРНЫМИ ПОВЕРХНОСТЯМИ КУЛАЧКОВ

Заявленная группа изобретений относится к обработке металлов давлением и может быть использована для формирования пазов с помощью кулачков. Устройство имеет более двух кулачков, каждый из которых имеет зубчатое колесо, которое находится в зубчатом зацеплении с ведущей шестерней для поворота всех кулачков. При этом каждый кулачок имеет: кулачковую поверхность с разрывами и с областями увеличивающегося постоянного радиуса, тяговую поверхность, выступающую из тела кулачка и расположенную рядом с разрывом стопорную поверхность. Причем разрыв в каждой кулачковой поверхности выровнен с зазором в тяговой поверхности каждого кулачка для обеспечения зазора для вставки и удаления трубного элемента между кулачками для формирования окружного паза при вращении кулачков. Устройство также содержит чашку, расположенную рядом с ведущей шестерней, выполненную с возможностью перемещения вдоль оси ведущей шестерни для зацепления и расцепления со стопорной поверхностью на одном из кулачков. Зацепление между ...

Устройство для накатывания наружной резьбы

Изобретение относится к обработке металлов давлением и может быть использовано при накатывании наружной резьбы. Цель изобретения - упрощение конструкции устройства. Устройство содержит два резьбонакатных ролика с винтовой нарезкой, подвижный подпружиненный опорный нож и дополнительную неподвижную опорную поверхность, которая расположена ниже поверхности опорного ножа на величину, равную половине высоты профиля резьбы накатных роликов. Заготовку устанавливают на подвижный опорный нож, при этом ее ось размещается практически в плоскости расположения осей роликов. В процессе накатывания резьбы происходит увеличение диаметра заготовки, при этом поверхность опорного ножа опускается, а заготовка входит в контакт с неподвижной опорной поверхностью. 2 ил.

Устройство к резьбонакатным автоматам для накатки резьбы

Плоские плашки для накатки наружной резьбы

Устройство для выдавливания резьбы на полых изделиях

Изобретение относится к обработке металлов давлением в устройствах для выдавливания резьбы и канавок на полых изделиях и позволяет повысить надежность работы и качество обработки . Заготовка устанавливается на оправке , а дно зажимается между двумя дисками с кольцевыми роликовыми обоймами , которые поджимаются к оправке с помощью упора. Ролики в обойме расположены вдоль одной или нескольких концентрических окружностей. За счет такого расположения роликов диски с заготовками имеют возможность радиального перемещения относительно оправки , при этом заготовка поджата дисками к оправке и вращается вместе с ней. Такое закрепление заготовки ликвидирует пробуксовку, позволяет увеличить глубину подачи давильного инструмента и повысить качество поверхности изделия. 2 ил. « (Л ас ю 4 ...

Резьбонакатная плоская плашка

Резьбонакатная головка с тангенциальной подачей роликов

Метчик для выполнения резьбы путем пластического деформирования металла

MACHINE FOR KNURLING CYLINDRICAL PARTS

Способ обработки металла давлением

Резьбонакатный ролик и фреза для его изготовления

VERFAHREN UND VORRICHTUNG ZUM SIGNALISIEREN UND SORTIEREN VON FALSCH GEWALZTEN PRODUKTEN AUF GEWINDEWALZMASCHINEN

HERSTELLUNGSVERFAHREN FÜR EIN BAUTEIL MIT GEWINDE UND SO HERGESTELLTES BAUTEIL

Vorrichtung zum Entgraten von Schraubenkoepfen

Making screws by adding head to shaft, presses more ductile head onto pre-formed, profiled shaft, to produce closed, interlocking bond between them

The shaft metal is deformable and is processed using the ECAP (Equal Channel Angular Pressing) operation. Its ductility is less than that of the screw head metal. A profile is first worked into the screw shaft preform; this includes radial and axial resting surfaces. A pre-formed blank screw head is then pressed onto the shaft, using a tool. The ductile head material fills up the space between the radial and axial resting surfaces in the region of the pressed-on head. In this way, head and shaft are interlocked together and the final form of the headed screw is reached.

Pipe has cylindrical pipe end, which is provided with outer thread, where sleeve is arranged inside in pipe end for supporting pipe end by manufacturing outer thread

The pipe has a cylindrical pipe end (1), which is provided with an outer thread (2). A sleeve (3) is arranged inside the pipe end for supporting the pipe end by manufacturing the outer thread. The sleeve is formed in axial direction viewed longer than the outer thread and has a total length of 30 to 100 millimeter. The sleeve is fixed in the pipe end with a fixation (4) like form-fit pressing operation.

Metal machine bolt has at least one recess in cylindrical surface region with its longitudinal axis at angle other than zero to vertical to bolt's longitudinal axis

The metal bolt (2) has a longitudinal axis (4), a head part (6) and a shaft part (8) with cylindrical surface region (10). in which there is at least one recess (16), the longitudinal axis of which is at an angle other than zero to a vertical to the bolt's longitudinal axis. The recess extends from the endface at least as far as the threaded region.

Improvement in tapping screws or threaded fasteners

... 491,680. Self-tapping screws. ROSENBERG, H. June 22,1937, No. 17331. Drawings to Specification. [Classes 83 (ii) and 83 (iii)] A tapping screw having a thread tapering at the entering end has the thread intersected by one or more grooves extending along the body to provide abrupt cutting shoulders, the surfaces of the thread and the grooves being compacted by stamping or rolling. The construction of tapping screw is described in Specification 491,710.

Improvements in and relating to a method of making self-threaded tapping screws or threaded fasteners

... 491,710. Self-tapping screws; rolling. ROSENBERG, H. June 22, 1937, No. 9704 /38. Divided out of 491,680. [Classes 83 (ii), 83 (iii), and 83 (iv)] In a method of making selftapping screws having a tapered entering end with the thread of the tapered part intersected by one or more grooves, the thread and grooves are formed simultaneously by rolling or stamping between dies. The screw has a holding portion 2 with threads of full depth and a tapered entering portion 5 with threads 6 of diminishing height towards the end but uniform core diameter. A groove 7 is formed in the apex of the tapering threads. Longitudinal grooves 8, either axial or inclined, extend from the end of the screw to a point short of the first full thread 2 so as to leave a complete grooved thread 5x between the threads 2 and 5. In a modification, the tapering threads 6a, Fig. 6, remain of V-shaped section and are not grooved at the apex. In a further modification the tapering threads 6b, Fig. 7, are of truncated section ...

Fastener unit

... 645,359. Bolts; locking nuts. ILLINOIS TOOL WORKS. July 29, 1947, No. 20403. Convention date, May 17, 1941. [Class 89(i)] [Also in Group XXII] Relates to screw and washer assemblies of the type in which the screw has a widely spaced quick pitch thread, and consists in the provision of means adjacent the end of the thread to prevent the washer from canting with consequent risk of disengagement. The screw is provided with an annulus of projections 26 that may extend completely round the shank or may form a continuation of the terminal part C, Fig. 8 of the thread.

Improvements in or relating to rolling metal rods bars or the like

... 255,268. Wade, H., (Abramsen, P. B.). Sept. 23, 1925. Roilling screw-threads; skew-rolling. - Round bars are reduced in diameter by feeding each bar into skew rolls 2, 3 which circumferentially furrow them by screwing and then by pressing down the ridges in other skew rolls 21, the bar being free to elongate. The bar A is placed between pivotally-mounted guides 8 and a top guide 12 until its end bears against a stop 10. Rotation of the cams 11 by links 9 forces the bar A up so that it is gripped at its sides between the rolls 2, 3 and screw-threaded. Guides 19, 20 are provided for the passage of the bar between the smoothing rolls 21. A succession of non-continuous screwing and smoothing rolls with a finishing pair of hyperbolic skew rolls forms a mill.

PRODUCING SCREW-THREAD

Improved fixing

Masonry fixing screw

A self-tapping masonry screw comprises a shank 2 formed with a rolled helical groove 5 next to one or two helical ridges 6 & 7, and with a land 9 relative to which the ridge(s) is raised and the groove 5 is depressed, the axial width of the land being at least 4mm and at least 50% of the land diameter, and the helix angle of the ridge is at least 10 degrees. ...

SCREW SHAFT DEFORMATION

Screw thread system

... 1,072,578. Rolling threads; taps. STANDARD PRESSED STEEL CO. June 5, 1964 [June 6, 1963], No. 23472/64. Headings B3M and B3N. [Also in Division F2] Fatigue life of mating screw-threaded components is increased by (a) relieving the pressure flank 19 of the external thread so that no flank contact occurs from the root to at least the pitch line 14 of the internal thread; (b)forming the internal thread with a progressively longer lead than that of the external thread when unloaded; and (c) correcting the true pitch diameterof either or both threads to prevent interference when unloaded. Under load, thread deflection causes the differential lead to be absorbed into full length contact. Features (b) and (c) form the subject-matter of Specification 1,032,814. In -Fig. 1, the internal thread flanks are straight and conventional. The external flanks are symmetrical-involute and the radius 19 of the above-pitch-line relief is four times thread height, the root radius 18 being twice thread height ...

SELF-LOCKING BOLT AND MANUFACTURE THEREOF

... 1,268,416. Rolling threads. J. H. STOVER III. 18 Aug., 1969 [24 Oct., 1968], No. 41176/69. Heading B3M. [Also in Division F2] A self-locking bolt, stud or set screw is formed by rolling an unthreaded blank having a bore in its leading end between a pair of dies 12, 13 (Fig. 1) opposed parts of the thread on the blank being indented to provide a portion of the blank with an elliptical cross-section. The blank is indented by inserts 20 and 21 carried in the dies, each insert being held in a cylindrical bore by a screw 23. The threading grooves on each insert, Fig. 9, protrude outwardly to deform the blank in the region of a central bore provided in the end of the blank. The main threading grooves of each die are relieved in the region 12d following the insert. The bore in the blank has a length of 1D and a diameter of 0À35 to 0À5 D, where D is the outer diameter of the rolled thread. The diameter of the major axis of the elliptical cross-section is about 1À03 D.

SELFLOCKING FASTENERS

... 1317652 Rolling threads U S M CORP 25 June 1970 [18 July 1969] 30925/70 Heading B3M [Also in Division F2] A self-locking screw 20, Fig. 11, is provided on its shank with normal convolutions 80 and with truncated convolutions 26 and 30 which produce a locking action with a mating thread 28. The shank 92 (which faces away from the head 22 of the screw) of the convolution 26 is arranged at a smaller angle 104 than normal, and the opposed, load-bearing, flank 96 is slightly thicker than normal. The truncated convolutions are produced by rolling a blank between a pair of flat dies, one at least of which has a modified thread form. Each die 34 and 36, Fig. 2, may have several of its normal thread-forming projections removed at 46. In addition to these removals, shown in Fig. 10 at 58 and 60 in die 56, and 62 and 64 in die 54, the adjacent faces 66, 68, 70 and 72 are ground away to reduce their thickness.

SCREW THREADED MEMBERS AND THEIR MANUFACTURE

THREAD-FORMING SCREW AS WELL AS PROCEDURE FOR MANUFACTURING THE SAME

PROCEDURES FOR THE PRODUCTION OF A WITH HOT-ROLLED SCHRAEGRIPPEN FORMED STEEL BAR

PROCEDURE FOR MANUFACTURING A SCREW WITH A DRILLING POINT, A SCREW AND ROLLING CHEEKS

BETONBEWEHRUNGSSTAB, INSBESONDERE ANKERSTAB, UND VERFAHREN ZU SEINER HERSTELLUNG

VERFAHREN ZUR HERSTELLUNG EINES MIT WARMGEWALZTEN SCHRAEGRIPPEN PROFILIERTEN STAHLSTABES

SCREW, PROCEDURE AND ROLLING CHEEKS FOR YOUR PRODUCTION.

SELFCUTTING SCREW, PROCEDURE AND TOOLS FOR MANUFACTURING THE SAME AS WELL AS PROCEDURE FOR CONNECTING THIN WORKPIECES

MANUFACTURING PROCESS FOR A CONSTRUCTION UNIT WITH THREAD AND SO MANUFACTURED CONSTRUCTION UNIT

Pair of thread rolling cheeks

PROCEDURE FOR THE PRODUCTION OF A SELFCUTTING SCREW, AS WELL AS PAIR OF THREAD ROLL CHEEKS FOR ITS DURCHFUHRUNG

SELFCUTTING SCREW AND BLANK TO YOUR PRODUCTION

PROCEDURE FOR THE PRODUCTION OF SCREW MOUNTINGS OR THREAD LINKAGES

PROCEDURE FOR FORMING A THREAD ON A REINFORCING BAR

ELEMENT TO THE IMPLANTATION IN BODY FABRICS AND EQUIPMENT TO ITS PRODUCTION

SLAB-SIDED SELF TAPPING SCREW

Forging machine having rollers between a support and a slide body of a die assembly

Light alloy thread-forming screw and its production method

PRODUCTION OF A ROLLED THREAD ONTO A DEFORMED BAR

FORMING OXALATE COATINGS ON METAL SURFACES

COLD FORMING TAPERED THREADS

THREAD-ROLLING END-WORKING ATTACHMENT

An improved end-working attachment (30) for a screw machine or a rotary transfer machine is particularly suited for use in rolling threads on a workpiece. The attachment broadly comprises: a slide base (31) having an axis (y-y); at least two members (32, 32) mounted on the slide base for sliding movement in a radial direction toward and away from the slide base axis; a tool, such as a thread die (33), on each member; an infeed mechanism (34) for selectively causing the slide members to move toward the slide base axis such that said tools will engage said workpiece; and a return mechanism (35) for urging the members to move away from the slide base axis.

A BOLT AND THREAD ROLLING DIE AND THE MANUFACTURE OF THE BOLT

The object of the present invention is to provide a bolt that effectively prevents gouging, seizure and racing between the bolt and nut without the aid of a guide boss and is effective when combined with the case nut. Said object can be attained by providing a bolt having a threaded shank portion wherein a plural number of notched faces slanting toward the end of said threaded shank portion at an angle ranging from ~15.degree. to ~80.degree. toward the axis of said threaded shank portion, are formed at the beginning of the thread part of said threaded shank portion.

FASTENER HAVING MULTIPLE LOBED THREAD

A threaded fastener includes a lead having bosses separated from one another by bases along the thread crest. The lead-in and lead-out profiles of the bosses, and other features of the bosses and bases may differ from one another along the fastener shank. The lead-in and lead-out profiles may have linear and non-linear surfaces. The lead-in and lead-out profiles may have cutting edges angled toward the direction of propagation of the bosses. The boss profiles may be selected to reduce insertion torque and to provide excellent resistance to pullout. The fastener may be formed by roll threading via a tool made by a plunge EDM process.

VIBRATION-RESISTANT SCREW

SELF-LOCKING THREADED FASTENERS

METHOD OF MAKING A THREAD FORMING SCREW AND ARTICLE PRODUCED THEREBY

SELF THREAD CREATING FASTENER AND METHOD AND APPARATUS FOR MAKING THE SAME

SELF-TAPPING SCREW, BLANK, METHOD AND DIES FOR MAKING THE SAME AND METHOD FOR JOINING THIN WORKPIECES

A headed multi-lobed blank, method of manufacturing a self-tapping screw from the blank, and resulting multi-lobed self-tapping (902) screw for joining thin workpieces (1402,1404) provides desirable thread-forming characteristics at the conical tip and body portions, and improved resistance to vibrational loosening near the head. The resulting screw, obtained from the blank and method, incorporates a threaded tapered root portion (906) between the screw head (410) and body por-tion having a cross section that varies from nearly circular in the area adjacent to the under-side of the head (410) to a maximum out-of-round (or lobular) cross section at the intersection of the tapered root portion (906) and the screw body. This shape, combined with a thread profile outer diameter that remains largely constant from the body portion through the tapered root portion (906), and a multiple coil (lead threaded) shape, ensure more secure holding of the screw (902) in a thin anchor material (1404) - ...

SLAB-SIDED SELF-TAPPING SCREW

SCREW, NUT AND THREAD ROLLING DIE

A screw having a main thread (2) to be screwed in and a sub-thread (3) formed in the direction opposite to the main thread, which is characterized in that a slant surface (3b) of the sub-thread on the screw-loosening side has a sharp slope whereas that (3a) on the screwtightening side has a gentler slope. When such a tapping screw as above is screwed into a pre-drilled hole (4) and the sub-thread (3) advances in the direction opposite to the screwing-in direction thereof while acting like a wedge because the slope of the slant surface (3a) on the screw-in side is gentler. When the screw is subject to torque in the screwloosening direction after tightened, the torque acts on the sub-thread (3) in the tightening direction thereof and, because of the sharp slope of the slant surface (3b) on the screw-loosening side, the sub-thread resists the unscrewing of the screw as if eating into the surface of the pre-drilled hole and prevents the screw from loosening. 16 ...

SELF-DRILLING SCREW

A self-drilling screw is provided which is suitable for use with both thick section metal plate and thin section metal sheet. The screw is formed from a blank 1 which includes a shank 2 extending between a head 3 and drilling top 4. The shank 2, adjacent the head 3, is formed with a frusto-conical enlargement 8. A thread 10, when formed in shank 2 is extended into enlargement 8 to create a final part 11 of the thread which, in use of the screw with sheet metal 12, distorts the sheet metal such that it firmly locks onto the enlargement 8. A shallow recess 6 is provided in the underside of head 3 surrounding the frusto-conical enlargement 8.

FASTENER WITH THREAD LOCK

A threaded fastener (12) that self locks as it is tightened to a fastened object (14). The thread (30) includes one or more portions (48) that are shifted, resulting in one or more discontinuities in the thread (30). Each shifted portion (48) of thread (30) is fully formed at the discontinuity. The shifted portions (48) will deform a relatively softer female thread, causing the deformed thread to move up and over the end faces (56) of the shifted portions (48) and to pack up in front of the end faces (56) to prevent any significant loosening of the connection.

METHOD OF THREAD ROLLING A SCREW SHAFT

In a method of thread rolling a screw shaft, an inclining portion 1c is formed to the boundary between the machining portion 1a of a screw shaft material 1 and the non machining portion 1b thereof as well as a taper portion 2b is formed to screw groove forming dies 2, by which a machining load concentrating at the thread rolling portion on the end of the dies on a chuck side can be reduced. With this method, the screw shaft can be thread rolled to have straightness of high quality.

A BOLT AND A MANUFACTURING METHOD THEREOF

The object of the present invention is to prevent the encroaching and the seizure between the bolt and the female screw caused by an oblique screwing of the bolt into the female screw when the bolt and the female screw are fastened together. Another object of the present invention is to manufacture the bolt in a low cost, by using said bolt, the encroaching and the seizure between the bolt and the female screw caused by a oblique screwing of the bolt into the female screw are certainly prevented. Said objects may be attained by a bolt consisting of a column part and a polygonal pillar part extending from an end of said column part wherein a complete thread is formed on said column part and a screw blade continuing to said complete thread is formed on said polygonal pillar part.

Verfahren zur Herstellung von Schrauben mit selbstschneidendem Gewinde.

Elektronengesteuerte Schaltanordnung zum Auslösen und/oder Unterbrechen von Arbeitsvorgängen, insbesondere bei Gewindewalzmaschinen.

Vis à filet auto-taraudant et procédé de fabrication de cette vis

Procédé de fabrication d'une vis à rainures et vis obtenue par ce procédé

Sicherungsschraube

Selbstsperrendes Befestigungsmittel

Sicherungsschraube

Vis à blocage automatique et son procédé de fabrication

Schraube

Längsnutenloses Werkzeug zum Formen von Gewinde und Verfahren zur Herstellung des Werkzeuges

Procédé de fabrication d'un organe à filière pour sa mise en oeuvre et organe obtenu par ce procédé

SELBSTSICHERNDE SCHRAUBE.

Matrice pour la fabrication par laminage de vis, l'utilisation de deux matrices, et procédé de fabrication de cette matrice

Vis taraudeuse

Procédé de formation par roulage des filets d'une vis taraudeuse, outillage pour la mise en oeuvre du procédé et vis obtenue par ce procédé

Gewindewalzbackenpaar zur Herstellung einer selbstbohrenden und -gewindeschneidenden Schraube

Befestigungselement mit selbsthemmendem Gewindeabschnitt

Method and device for signalling and sorting incorrectly rolled products on thread-rolling machines.

TAPPING SCREW AND INTERLOCKING ARRANGEMENT OF PADS.

Self-tapping screw as well as a method for producing the same and a roller jaw for carrying out the method

Self-tapping screw and thread-rolling process for this screw

VIS AUTO- [...] ET AUTO- [...].

DEVICE AND PROCEDURE FOR COLD-ROLLING PROFILES BY SHIFTING ON THE EXTENT IT OF ROTARY WORKPIECE.

Apparatus and process for the cold rolling of sections by rolling on the circumference of a simultaneously rotating workpiece

In section rolling, the conicity of the workpiece (6) is influenced by a variation in the inclination of the rolling shaft (2) and therefore of the section roll (25, 26). The conical production of the rolls becomes unnecessary. ...

WELD STUD

A welding stud including a head and a shank extending from the head. The shank has an end region opposite the head and the end region includes at least two angled surfaces which incline towards an axis of the shank in a direction moving away from the head. 1. A welding stud comprising:a head and a shank extending from the head;wherein the shank has an end region opposite the head, wherein the end region comprises at least two angled surfaces which incline towards an axis of the shank in a direction moving away from the head.2. The welding stud of claim 1 , wherein the angled surfaces are inclined in the range of 2° to 20° with respect to the axis.3. The welding stud of claim 1 , wherein the angled surfaces are inclined in the range of 3° to 12° with respect to the axis.4. The welding stud of claim 1 , wherein the angled surfaces are inclined by about 6° with respect to the axis.5. The welding stud of claim 1 , wherein the end region includes at least four angled surfaces.6. The welding stud of claim 1 , wherein the end region of the shank includes at least one tapered gradation of diameter7. The welding stud of claim 1 , wherein the shank includes an external thread.8. The welding stud of claim 7 , wherein the end region includes at least one tapered gradation of diameter claim 7 , the diameter of the gradation of diameter being slightly smaller than a minor diameter of the thread.9. The welding stud of claim 7 , wherein the end region of the shank includes a first and a second gradation of diameter claim 7 , wherein the first gradation of diameter is farther away from the head of the shank and is smaller than the second gradation of diameter claim 7 , andwherein the second gradation of diameter is smaller than a nominal diameter of the thread.10. The welding stud of claim 7 , wherein the shank includes at least one paint scraping groove that extends in a longitudinal direction of the shank and at which the threads are interrupted.11. The welding stud of claim 10 , ...

Method for Producing a Concrete Screw

A method for producing a concrete screw is disclosed. The method includes providing a wire piece as a workpiece, forming a thread helix on a lateral surface of the workpiece, and providing a depression in the lateral surface of the workpiece by a forming process. 19.-. (canceled)10. A method for producing a concrete screw , comprising the steps of:providing a wire piece as a workpiece;forming a thread helix on to a lateral surface of the workpiece; andproviding a depression in the lateral surface of the workpiece by a forming process.11. The method according to claim 10 , wherein the step of providing the depression is performed and subsequently the step of forming the thread helix is performed.12. The method according to claim 11 , wherein a geometry of the depression is changed when forming the thread helix.13. The method according to claim 12 , wherein the thread helix is formed in a thread rolling process claim 12 , wherein during the thread rolling process a profiled rolling tool acts on the workpiece and sets the workpiece in motion in a workpiece rotational direction claim 12 , and wherein the rolling tool acts on a sub-region of an edge of the depression and deforms the depression.14. The method according to claim 13 , wherein the depression is asymmetric in a cross-sectional perspective of the workpiece claim 13 , wherein a flank of the depression leading in a screw-in direction of the thread helix runs flatter in relation to the lateral surface than a flank of the depression trailing in the screw-in direction.15. The method according to claim 10 , wherein the concrete screw has a screw head that is broadened relative to a shank of the concrete screw and is formed from an end-side thickening.16. The method according to claim 15 , wherein the screw head is formed simultaneously with the providing of the depression in the lateral surface of the workpiece.17. The method according to claim 10 , wherein the depression is open toward a front face of the workpiece ...

THREADED REINFORCING BAR COUPLING FOR DEFORMED REINFORCING BAR, AND THREADED DEFORMED REINFORCING BAR

A threaded reinforcing bar coupling for a deformed reinforcing bar according to the present invention connects a pair of reinforcing bars (), which are deformed reinforcing bars, with male threaded portions () provided at end portions of the reinforcing bars and a threaded cylinder (). In each reinforcing bar (), by roll forming on an iron wire rod which is a raw material, a projection () on an outer peripheral surface is formed and a diameter enlarged portion which is larger in diameter than another portion is formed in a portion in a longitudinal direction. An outer diameter of the diameter enlarged portion is not larger than a reinforcing bar outermost diameter (D) including the projection () of the reinforcing bar (). The male threaded portion () is formed in the diameter enlarged portion by rolling. 1. A threaded reinforcing bar coupling for a deformed reinforcing bar , the threaded reinforcing bar coupling connecting a pair of reinforcing bars , whereina male threaded portion is provided at each of opposed end portions of the pair of reinforcing bars to be connected to each other,a threaded cylinder is provided so as to be screwed onto the male threaded portions of both reinforcing bars,at least one reinforcing bar of the pair of reinforcing bars is a deformed reinforcing bar including a projection on an outer peripheral surface of a reinforcing bar main body, andin the at least one reinforcing bar which is the deformed reinforcing bar, the projection on the outer peripheral surface is formed and a diameter enlarged portion which is larger in diameter than another portion is formed in a portion in a longitudinal direction by roll forming on an iron wire rod which is a raw material, an outer diameter of the diameter enlarged portion is not larger than a reinforcing bar outermost diameter including the projection of the reinforcing bar, and the male threaded portion is formed in the diameter enlarged portion by rolling.2. The threaded reinforcing bar coupling ...

Connecting Element

The invention relates to a connecting element () for connecting at least two components that are positioned one on top of the other, comprising a shaft () and a head (), which is provided with a drive (), the shaft () being formed from a base material and ending at the exposed shaft end thereof that is opposite the head (). The invention is characterised in that a tip () made of plating material is applied to the exposed shaft end, which plating material is different from the base material. 110305014345612323814343612321640523636. Connecting element ( , , ) for connecting at least two components that are positioned the one on top of the other , comprising a shaft ( , , ) and a head ( , ) , which is provided with a drive () , the shaft ( , , ) being formed from a base material and ending at its exposed end that is opposite the head ( , ) , and a tip region ( , , ) made of a plating material () is applied to the exposed shaft end , which plating material () is different from the base material.236. Connecting element according to claim 1 , wherein the plating material () is a material that is hardenable or harder than the base material.3164052. Connecting element according to claim 1 , wherein the tip region is formed as a tip ( claim 1 , claim 1 , ).4. Connecting element according to claim 1 , wherein the base material is an acid-resistant stainless steel claim 1 , or a non-ferrous metal alloy.5. Connecting element according to claim 1 , wherein the plating material at the tip is formed into its final tip shape by rolling or pressing.6. Connecting element according to claim 1 , wherein the plating material at the tip is formed into its final tip shape by machining.730. Connecting element according to claim 1 , wherein the connecting element () is a self-tapping screw.830504258. Connecting element according to claim 6 , wherein at least in at least part of its tapping region claim 6 , the self-tapping screw ( claim 6 , ) exhibits a thread ( claim 6 , ) made of plating ...

Fastener with cleaning and leveling wings

Fasteners, methods of forming fasteners, and methods of securing a work piece to a substrate using a fastener. Embodiments include fasteners having a structural feature below the head. The upper extent of the structural feature is on a plane parallel to the leading surface of a fastener head. Embodiments include a washer between the head and the structural feature. The structural feature may include a cutting edge for cutting and/or reaming a portion of the work piece.

Anti-loosen Screw Manufacturing Method and Screw Member Produced Thereby

A screw includes a shank portion, an outer thread portion and a laterally-extruded thread portion. The shank portion has an outer circumferential surface on which to form the outer thread portion having grooves. In a thread-rolling process, the laterally-extruded thread portions is formed by laterally extruding an inclined wall of one groove with respect to a longitudinal direction thereof such that a laterally-extruded portion is protruded in an adjacent groove and is tightly engaged with an inclined surface of a groove of inner threads of a screw hole 1. An anti-loosen screw manufacturing method comprising:combining a main die plate with a protruded die plate to form a combined die plate;utilizing the main die plate of the combined die plate to execute a thread-rolling process on an outer circumferential surface of a shank portion to form an outer thread portion which includes a plurality of grooves; andutilizing the protruded die plate of the combined die plate to execute an extrusion-forming process to form at least one or a plurality of laterally-extruded thread portions on a predetermined groove of the outer thread portion in the thread-rolling process;wherein each of the laterally-extruded thread portions is formed by laterally extruding a first inclined wall of the predetermined groove of the outer thread portion with respect to a longitudinal direction thereof such that a first laterally-extruded portion is protruded in a first adjacent groove of the predetermined groove; andwherein the laterally-extruded thread portion widens a width of the predetermined groove such that the first laterally-extruded portion is tightly engaged with a first inclined surface of a first groove of inner threads of a screw hole.2. The anti-loosen screw manufacturing method as defined in claim 1 , wherein each of the laterally-extruded thread portions is further formed by laterally extruding a second inclined wall of the predetermined groove of the outer thread portion with ...

THREADED FASTENER

A threaded fastener is provided in which a head bearing surface can be in full intimate contact with a counterpart. The threaded fastener is provided with a head (), and a screw shank () extending from the head (). The screw shank () is provided with a parallel thread portion () having a complete screw thread formed therein, a neck portion () having no screw thread, a transition thread portion () having an incomplete screw thread formed to extend from the parallel thread portion () toward the neck portion () with its root diameter being the same as that of the complete screw thread and with its thread height gradually becoming lower to reach the neck portion, and an underneck rounded portion () formed in a corner angle portion between the neck portion () and a head bearing surface (), wherein the neck portion () is work hardened with its diameter being narrowed from a root diameter of the parallel thread portion (). 1. A threaded fastener which is provided with a head and a screw shank extending from said head , wherein said screw shank is provided with a parallel thread portion having a complete screw thread formed therein , a neck portion having no screw thread , a transition thread portion having an incomplete screw thread formed to extend from said parallel thread portion toward said neck portion with its root diameter being the same as that of said complete screw thread and with its thread height gradually becoming lower to reach said neck portion , and an underneck rounded portion formed in a corner angle portion between said neck portion and a head bearing surface ,whereinsaid neck portion is work hardened with its diameter being slenderly narrowed from the root diameter of said parallel thread portion; andthe strength of said neck portion is made to be higher than that of each of the thread portions so that a fracture position in the case where said screw shank is fractured is made to be in said parallel thread portion.2. The threaded fastener according to ...

Method, module, and apparatus for roll-processing external pipe thread, and external pipe thread production line

Provided is a method for performing an external pipe thread process on a hollow blank by at least twice rolling, wherein amount of rolling wheels in a rolling wheel set, used in any two back-to-back rolling processes in a processing sequence, are different in parity. Further provided are various roll-processing modules and corresponding rolling apparatuses, achieving the above processing method and having a simple structure, portability and practicality. A hollow blank is not liable to deform when performing an external pipe thread rolling process thereon, thereby improving a processing yield.

Pull-up bolt assembly

In combination, a manway cover and a manway flange having one or more bolt opening(s) and a pull-up bolt assembly adapted to be used for supporting a hinge component to the manway cover, the manway flange, or both, where the pull-up bolt assembly having a pull-up bolt member, a nut component, a tapered member, and an expandable friction member, where one or more structures selected from a thread, a ridge and/or a groove disposed on an outside surface of the expandable friction member and the one or more bolt opening(s) having an inside surface adapted for mating with the corresponding one or more structures of the expandable friction member whereby, when the pull-up bolt assembly is engaged within the one or more bolt opening(s), the one or more structures aligns with the corresponding inside surface of the one or more bolt opening(s). 1. In combination , amanway cover and a manway flange wherein each of the manway cover and the manway flange has one or more bolt opening(s) and a pull-up bolt assembly adapted to be used for supporting a hinge component to the manway cover , the manway flange or both , wherein the pull-up bolt assembly has a pull-up bolt member , a nut component , a tapered member , and an expandable friction member , the combination comprising:one or more structures selected from the group consisting of a thread, a ridge and a groove disposed on an outside surface of the expandable friction member, andone or more of the bolt opening(s) having an inside surface adapted for mating with the corresponding one or more structures of the expandable friction member whereby, when the pull-up bolt assembly is engaged within the one or more bolt opening(s), the one or more structures of the expandable friction member aligns with the corresponding inside surface of the one or more bolt opening(s) and securely fixes the one or more structures with the mating inside surface of the bolt opening.2. The pull-up bolt assembly of claim 1 , wherein the one or more ...

FRICTIONALLY DAMPED FASTENERS AND METHODS OF MANUFACTURING THE SAME

A method and system for increasing damping capacity in a mechanical fastener by utilizing dry friction between individual wires of a sheathed rope is disclosed. For metal fasteners, the sheathed rope is inserted loosely into a thick-walled metal tube. The tube is then rolled to reduce the tube diameter, thereby uniformly embedding the rope into the tube material. The tube is then subjected to either cold or hot forming. After forming, the fastener blank may be threaded. For composite or plastic fasteners, the sheathed rope includes insert locators attached to the sheathing. The sheathed rope having the insert locators is placed in the mold cavity prior to the polymerizable material being injected into the mold. Regardless of the embodiment, the resulting fastener has increased damping due to the dry inter-wire friction within the embedded rope which develops between the surfaces of individual wires upon dynamic loading of a fastened joint. 1. A vibration-damping fastener comprising:a body having a first end, a second end and a long axis;a vibration-damping metal rope embedded in said body along said axis between said first and second ends, said rope comprising a plurality of wires positioned next to one another and a metal sheathing encasing said plurality of wires, whereby sliding movement of the surfaces of the wires relative to one another dampens resonant vibration of the fastener.2. The vibration-damping fastener of claim 1 , wherein said first end is a head portion and said second end is a fastening portion.3. The vibration-damping fastener of claim 2 , wherein said fastening portion is threaded.4. The vibration-damping fastener of claim 1 , wherein said metal sheathing includes at least one material-passing perforation.5. The vibration-damping fastener of claim 1 , further including at least one insert locator extending from said metal sheathing.6. The vibration-damping fastener of claim 5 , wherein elongated fastening portion has an outer surface and wherein ...

METRIC SELF-TAPPING LOCKING SCREW AND THE MANUFACTURING METHOD THEREOF

A metric self-tapping locking screw comprises a screw head which is connected to a thread locking body by a screw rod. The thread locking body and the self-tapping tip are provided with a screw thread on the surface. The self-tapping tip is arranged at the root of the thread locking body; the screw thread adopts the basic structure of the standard ordinary triangular thread. The flank angle back to the fastened surface is 15-20° and the flank angle of the screw thread facing the fastened surface is 30°. The metric self-tapping locking screw in the Invention make the installed parts to be fastened have higher axial clamping force and static loosing moment, which solves the attenuation problem of axial clamping force and static moment of fastened parts. 1. A metric self-tapping locking screw , comprising a screw head , a screw rod , a thread locking body , a self-tapping tip and a screw thread; the screw head is connected to the thread locking body with the screw rod; the thread locking body and the self-tapping tip are provided with the screw thread on the surface; the self-tapping tip is arranged at the root of the thread locking body; the screw thread adopts the basic structure of the standard ordinary triangular thread; a flank angle of the screw thread back to the fastened surface is 15-20° and another flank angle of the screw thread facing the fastened surface is 30°; a crest of the screw thread is in a plane transition structure or a natural circular arc transition structure.2. The metric self-tapping locking screw according to claim 1 , wherein the screw thread is divided into eight equal parts by eight mean lines; the eight mean lines include one-eighth line claim 1 , two-eighth line claim 1 , three-eighth line claim 1 , four-eighth line claim 1 , five-eighth line claim 1 , six-eighth line claim 1 , seven-eighth line and eight-eighth line; the intersection of the four-eighth line and the crest is a first crossing point; the intersection of the two-eighth line ...

FORM-ROLLING DIE STRUCTURE AND FORM-ROLLING METHOD FOR COMPOUND SCREW

[Problem] The purpose of the present invention is to provide a form-rolling die and form-rolling method for a compound screw that use a cylindrical material to be threaded, enable the high-precision mass production of compound screws having a right-hand thread portion and a left-hand thread portion on the same region, do not cause rolling defects such as slips, and in which blockages do not occur even in the unlikely event of shavings being generated. [Solution] A form-rolling die structure is provided with die members which are pressed against a material to be threaded and which have rigid surfaces that are relatively displaced. The die members are equipped with a plurality of independent concave portions which form a substantially parallelogram shape when viewed from the normal of a virtual surface obtained by connecting the outermost portions of each of the rigid surfaces, and which are recessed from the virtual surface. Two of the corners at the sites corresponding to the four corners of the substantially parallelogram-shape of the concave portions are rounded. The periphery of each concave portion in the cross-section along the direction of the normal is rounded along the periphery of the substantially parallelogram shape. The concave portions form a substantially truncated-pyramid shape. The sites equivalent to the ridge lines of the concave portions are rounded in cross-sectional view perpendicular to the ridge line, and bases () are provided in the deepest sites (). 1. A form-rolling die structure for a compound screw , comprising:die members pressed against a screw material and having rigid surfaces that are relatively displaced,wherein each of the die members is provided with a plurality of independent concave portions that forms a substantially parallelogram shape when viewed from the normal of a virtual surface obtained by connecting outermost portions of the rigid surfaces and is recessed from the virtual surface, andat least two corners corresponding ...

SELF-TAPPING SCREW AND METHOD OF MANUFACTURING THE SAME

A self-tapping screw according to the present invention includes a head and a shank extending from the head. The shank includes a cylindrical shank immediately below the head and a truncated conical shank following an end of the cylindrical shank, the cylindrical shank is provided with a plurality of first external threads, the truncated conical shank is provided with a plurality of second external threads following the first external threads, and a peak of each of the second external threads is provided with a biting surface having a concave-convex form. 1. A self-tapping screw comprising:a head; anda shank extending from the head,the shank including a cylindrical shank immediately below the head and a truncated conical shank following an end of the cylindrical shank,the cylindrical shank being provided with a plurality of first external threads,the truncated conical shank being provided with a plurality of second external threads following the first external threads,a peak of each of the second external threads being provided with a biting surface having a concave-convex form, whereinthe biting surface bites into an inner peripheral surface of a pilot hole.2. The self-tapping screw according to claim 1 , whereina plurality of first external threads formed on an end portion of the cylindrical shank are provided with a plurality of no-thread parts at regular intervals in a circumferential direction, anda plurality of second external threads formed on the truncated conical shank are provided with a plurality of no-thread parts at regular intervals in a circumferential direction.3. A method of manufacturing the self-tapping screw claimed in claim 1 , the method comprising the steps of:A) forming a blank with a shank including a cylindrical shank and a truncated conical shank,B) forming, on each of opposing rolling surfaces of a pair of rolling die plates, a vertical surface and an inclined surface that follows a lower end of the vertical surface and is inclined so as ...

AUTOMATIC STEEL-BAR COUPLING HEAD MAKING MACHINE

The present invention is to provide an automatic steel bar coupling head making machine including a positioning mechanism, a transverse moving mechanism, a longitudinal moving mechanism, a processing mechanism assembly and a control mechanism, wherein, when a steel bar is positioned between two fixtures of the positioning mechanism and an end of the steel bar presses against a positioning detection rod of the processing mechanism assembly, the processing mechanism assembly sends a start signal to the control mechanism and, upon receipt of the start signal, the control mechanism drives the positioning mechanism, the transverse moving mechanism, the longitudinal moving mechanism and the processing mechanism assembly, for enabling the two fixtures to clamp the steel bar and then enabling the processing mechanism assembly to sequentially perform a first turning, a second turning and a thread rolling on peripheral edge of the steel bar adjacent to the end of the steel bar. 1. An automatic steel-bar coupling head making machine , comprising:a fixing base having a bottom side fastened on a plane;a positioning mechanism fastened at a position on an upper surface of the fixing base and adjacent to a front side edge of the fixing base and comprising two fixtures, wherein each of the two fixtures has a fastening groove recessed on a side surface thereof, the fastening grooves of the two fixtures correspond to each other and form a channel therebetween, under a condition that the two fixtures are not pressed against with each other, so as to enable a steel bar to be passed through the channel, and wherein, under a condition that the two fixtures are pressed against with each other, the fastening grooves are pressed against two opposite outer edges of the steel bar, so as to fixedly clamp the steel bar between the two fixtures;a guiding seat having a bottom side fastened at a position on the upper surface of the fixing base and adjacent to a rear side edge of the fixing base;a ...

クランクシヤフトネジギアの転造装置

(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。

CARVER THREAD * AH FASTENING PART

Thread rolling dies made of dispersion-strengthened-type sintered alloy steel

(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 for making the self-thread forming threaded fasteners

A self-thread forming threaded fastener has a straight thread on a shank(30) of circular cross section & a tapered thread(34) on the work-entering end. The tapered portion(34) of the thread is of lobular root(32), pitch & crest surface cross sections. The fastener is formed by rollinhg between thread-rolling dies(56, 57) a blank having a cylindrical shank of circular cross section & an end section of arcuate lobular cross section including a tapered portion. The lobular and tapered portions of the blank are intermittently deflected by the dies.

Auto arraying and feeding device of a shaft

본 발명은 환봉소재에 나사 가공하도록 가공장치로 공급하기 위해 환봉소재의 가공부위를 일정한 방향 위치로 정렬하여 순차적으로 공급하는 환봉소재의 자동정렬 및 공급장치에 관한 것으로서, 좀더 상세하게는 호퍼피더(10)의 배출구에서 길이방향으로 나열하여 순차 이송공급하는 환봉소재를 경사가이드(21)를 따라 길이방향으로 경사지게 안내하면서 승하강작동하는 개폐구(26)에 의해 공급 및 공급차단하도록 제어하는 제1소재공급수단(20)과, 상기 제1소재공급수단에서 낙하되는 환봉소재(2)가 길이방향으로 일정하게 공급되는 안내구(32)의 테이블(36)을 환봉소재(2)의 가공부(3)가 정방향 또는 역방향 위치로 공급됨에 따라 180°방향 전환하여 일정하게 정렬하는 소재정렬수단(30)과, 상기 소재정렬수단에서 정렬된 환봉소재(2)를 실린더에 작동하는 푸쉬로드에 의해 피드블럭(55)의 장착홈(56)에 자동 공급하도록 하는 제2소재공급수단(40)에 의해 환봉소재의 가공부위를 일정한 방향 위치로 정렬하여 순차적으로 공급하는 과정을 자동으로 행하므로 작업성 및 생산성을 극대화함은 물론 종래 수작업의 경우와 같은 오작동의 우려를 방지하므로 사용상의 신뢰도를 극대화하는데 그 특징이 있다. The present invention relates to an automatic sorting and feeding device of a round bar material for sequentially supplying the processing parts of the round bar material in a predetermined direction to supply the processing device to thread the round bar material, and more specifically, a hopper feeder ( The first material to control the supply and supply cut off by the opening and closing operation opening 26 to move up and down while guiding inclined longitudinally along the inclined guide 21 guides the round bar material arranged in the longitudinal direction at the outlet of 10) The processing unit 3 of the round bar material 2 is provided with the table 36 of the guide port 32 through which the supply means 20 and the round bar material 2 falling from the first material supply means are constantly supplied in the longitudinal direction. ) Is supplied to the forward or reverse position is rotated by 180 ° direction constant alignment means 30 and the rod material (2) aligned in the material alignment means to operate the cylinder By the second material supply means 40 to automatically supply to the mounting groove 56 of the feed block 55 by the sheer rod, the process of sequentially aligning the processing portions of the round bar material to a certain direction position and supplying them sequentially As a result, it is possible to maximize workability and productivity, ...

Screw having a self drilling point

Fixing screw and method of manufacture

SELF-FORMING SCREW WITH POINT AND EQUIPMENT TO PRODUCE IT

Tapping screw

SELF-TAPPING FASTENER

Special screw for preventing loosening

본 발명은 나사의 몸통부 바깥쪽 둘레에 축방향에 경사진 홈을 방사상으로 수개 형성하여 체결이 신속하게 이루어지고, 체결 후 진동이나 충격 등의 외력에 의해 쉽게 풀리지 않도록 한 풀림방지용 특수나사에 관한 것이다. 즉, 본 발명은 머리부(2)와 외측으로 나선형의 나사산(4)이 일체로 형성된 몸통부(3)로 대분되어 이루어진 나사(1)를 구성함에 있어서, 상기 몸통부(3) 바깥쪽 둘레에 머리부(2)와 몸통부(3)가 이루는 축에 경사진 역회전방지홈(5)을 방사상으로 수개 형성하고, 상기 나사산(4)은 머리부(2)의 반대 측인 전방으로 치우치게 형성하며, 나사산(4)의 내측 각도를 45°로 형성한 것을 특징으로 한다. 상술한 바와 같이 본 발명에서 제공하는 풀림방지용 특수나사(1)는 나사(1)의 체결을 보다 공고히 하고, 체결이 보다 신속하게 이루어지도록 한 것으로서, 진동이나 충격 등의 외력에 의해 나사(1)가 대상물(6)로부터 쉽게 풀리지 않고, 나사(1)의 체결작업이 빨라 작업 시간을 단축시키며, 작업효율을 극대화시킬 수 있는 등 다수의 효과를 기대할 수 있는 것이다. 체결, 풀림방지, 나사, 머리부, 몸통부, 나사산, 역회전방지홈

External thread of input pipeline made as capable of tight fit, methods and devices for its formation, fittings

FIELD: construction. SUBSTANCE: on the entire length of useful thread there are two or more turns of the complete variation curved thread, in which tension along the average diameter of turns for specified value of fit tension is more than tension along the average diameter of turns of the appropriate reference standard conical thread. The side of the variation bent thread profile is a bent arched surface. The invention also relates to methods and devices for manufacturing of the external thread of the input pipeline, made as capable of tight fit, and also to the pair of fittings with thread of the input pipeline, made as capable of tight fit. EFFECT: production of a tight threaded joint without usage of seals. 12 cl, 14 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 491 467 (13) C2 (51) МПК F16L 15/06 B21H 3/02 B23G 7/00 E21B 17/042 (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2011103146/06, 29.06.2009 (24) Дата начала отсчета срока действия патента: 29.06.2009 (72) Автор(ы): КСИАО Джинъан (CN), ЖОУ Джун (CN) (43) Дата публикации заявки: 10.08.2012 Бюл. № 22 2 4 9 1 4 6 7 (45) Опубликовано: 27.08.2013 Бюл. № 24 (56) Список документов, цитированных в отчете о поиске: CN 489680 А, 14.04.2004. RU 2220019 C2, 27.12.2003. RU 93032121 A, 20.08.1995. GB 2074685 A, 04.11.1981. CN 1555938 A, 22.12.2004. 2 4 9 1 4 6 7 R U (86) Заявка PCT: CN 2009/072498 (29.06.2009) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 27.01.2011 (87) Публикация заявки РСТ: WO 2009/155884 (30.12.2009) Адрес для переписки: 192007, Санкт-Петербург, а/я 146, ООО "АИС поли-ИНФОРМ-патент" (54) НАРУЖНАЯ РЕЗЬБА ВВОДНОГО ТРУБОПРОВОДА, ВЫПОЛНЕННАЯ С ВОЗМОЖНОСТЬЮ ПОСАДКИ С НАТЯГОМ, СПОСОБЫ И УСТРОЙСТВА ДЛЯ ЕЕ ОБРАЗОВАНИЯ, ФИТИНГИ (57) Реферат: Группа изобретений относится к наружной резьбе вводного трубопровода, выполненной с возможностью посадки с натягом, которая может образовывать ...

Rolling die

A rolling die (2,10) is provided. The rolling die (2,10) includes a bite portion (6,16) having bite processing teeth at a bite starting point for a workpiece, and a finishing portion (7,17) having finishing processing teeth. The bite processing teeth at the starting point in the bite portion (6,16) have lower tooth height than the finishing processing teeth in the finishing portion (7,17). The bite processing teeth have a larger tooth tip angle and a larger trough angle than the finishing processing teeth.

DEVICE FOR ROLLING THREADS ON PARTS

1. Устройство (1) для накатки резьбы на детали с цилиндрической наружной поверхностью с помощью резьбонакатных роликов с профилирующим инструментом (7), не имеющим подъема профилем, причем ось профилирующего инструмента находится под углом или параллельно оси детали, отличающееся тем, что профилирующий инструмент (7) образован имеющим круглую форму установленным с возможностью вращения вокруг его оси диском (9), на наружном крае которого выступают вперед два кольцевых, коаксиальных, безподъемных профиля (10), которые между собой образуют кольцевое пространство (10), которое по форме и размерам соответствуют профилю подлежащей созданию резьбы.2. Устройство по п.1, отличающееся тем, что цилиндрическая деталь закреплена в частично цилиндрической канавке (12) опорной части (20), продольная ось которой расположена под углом к оси профилирующего инструмента (7).3. Устройство по п.2, отличающееся тем, что опорная часть (20) выполнена с возможностью перемещения поперек и, в частности, под прямым углом к оси профилирующего инструмента (7), в частности, вручную.4. Устройство по п.2 или 3, отличающееся тем, что внутренняя стенка частично цилиндрической канавки (12) имеет вырез резьбы, который по форме и подъему в основном соответствует резьбе, создаваемой на детали.5. Устройство по п.1, отличающееся тем, что цилиндрическая деталь установлена на стороне, лежащей напротив профилирующего инструмента (7), с помощью, по меньшей мере, двух с осями, параллельными детали, роликов (28), которые установлены на опорной части (20).6. Устройство по п.2, отличающееся тем, что для регулирования расстояния между профилирующим инструментом (7) и опорной частью (20) опор РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК B21H 3/02 (13) 2012 119 780 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2012119780/02, 02.09.2010 (71) Заявитель(и): ГОТФРИД ВИЛЬГЕЛЬМ ЛЕЙБНИЦ УНИВЕРЗИТЕТ ГАННОВЕР (DE) Приоритет(ы): (30) Конвенционный приоритет: 15.10. ...

Screw locking

THREAD FORMING SCREW AND METHOD OF MANUFACTURING IT

Threaded body and method and device for its production

SCREW BOLT WITH SECURING THREAD THAT CAN BE SCREWED INTO A NORMAL THREAD

SCREW THREAD BODY AND METHOD AND EQUIPMENT FOR PRODUCTION

Self-tapping screw, method and dies for making the same and method for joining thin workpieces

A headed multi-lobed blank, method of manufacturing a self-tapping screw from the blank, and resulting multi-lobed self-tapping (902) screw for joining thin workpieces (1402,1404) provides desirable thread-forming characteristics at the conical tip and body portions, and improved resistance to vibrational loosening near the head. The resulting screw, obtained from the blank and method, incorporates a threaded tapered root portion (906) between the screw head (410) and body por-tion having a cross section that varies from nearly circular in the area adjacent to the under-side of the head (410) to a maximum out-of-round (or lobular) cross section at the intersection of the tapered root portion (906) and the screw body. This shape, combined with a thread profile outer diameter that remains largely constant from the body portion through the tapered root portion (906), and a multiple coil (lead threaded) shape, ensure more secure holding of the screw (902) in a thin anchor material (1404) - with the anchor material extruded axially forward and backward (1405) around the root portion.

Fastner having multiple-bossed lead

A threaded fastener includes a lead having bosses separated from one another by bases along the thread crest. Two such leads may be formed such that lead-in profiles for of one lead are disposed at locations corresponding to locations of lead-out profiles for the other lead. The lead-in and lead-out profiles of the bossed, and other features of the bosses and bases may differ from one another along the fastener shank. The boss profiles may be selected to reduce insertion torque and to provide excellent resistance to pullout. The fastener may be formed by roll threading via a tool made by a plunge EDM process.

Screw and its method of manufacture

Patent FR2089493A5

LOCKING SCREW OF OSTEOSYNTHESIS PLATE AND METHOD OF MANUFACTURING SAME

L'invention concerne une vis de blocage d'une plaque de matériel d'ostéosynthèse du type de celle comprenant notamment : - une tige cylindrique filetée 1 destinée à pénétrer dans le tissu osseux du fragment d'une fracture, via une des ouvertures ménagées dans ladite plaque, - et une tête 2 prenant appui sur la susdite plaque qu'elle maintient plaquée contre ledit fragment. Selon l'invention, cette vis comporte une tige de préhension 3 qui, associée à la tête 2 de ladite vis coaxialement à cette dernière pour être logée dans le porte-outil de l'arbre de sortie d'un moteur rotatif, est montée dissociable de ladite tête 2 sous l'effet d'un couple de torsion minimum prédéterminé appliqué sur la susdite tige de préhension. L'invention concerne également un procédé de fabrication d'une telle vis. Applications : vis de blocage de matériel d'ostéosynthèse. The invention relates to a locking screw for a plate of osteosynthesis material of the type comprising in particular: - a threaded cylindrical rod 1 intended to penetrate into the bone tissue of the fragment of a fracture, via one of the openings made in said plate, - and a head 2 bearing on the aforesaid plate which it maintains pressed against said fragment. According to the invention, this screw comprises a gripping rod 3 which, associated with the head 2 of said screw coaxially with the latter to be housed in the tool holder of the output shaft of a rotary motor, is mounted separably of said head 2 under the effect of a predetermined minimum torque applied to the aforesaid gripping rod. The invention also relates to a method of manufacturing such a screw. Applications: locking screws for osteosynthesis material.

Cutting tool for thread rolling dies - has cutting teeth profile inclined at half angle of conical threaded pins

The cutting tool consists of a disc-shaped support with circumferential cutting teeth, having a profile corresponding to that to be cut by the rolling die. The support may have one or more parallel rows of teeth. To manufacture rolling dies (3, 4) for conical threaded pins (1), the cutting teeth are so positioned that their profile is inclined against the rotary plane of the support, in an axial direction, through an angle which corresponds to half the angle (2) of a conical pin. The angle bisectors of the profiled teeth flanks are at an angle to the rotary support axis, which corresponds to the difference between a right angle and half the cone angle.

Groove-less tapping tools and manufacturing processes

PROCESS FOR MAKING THREADS AND TOOL FOR IMPLEMENTING THIS PROCESS

UN FILETAGE EST D'ABORD TAILLE PAR ENLEVEMENT DE COPEAUX, DE MANIERE A PRODUIRE UNE SURFACE RUGUEUSE. LA SURFACE EST ENSUITE LISSEE PAR PRESSION, DANS UNE OPERATION DE FROTTEMENT DE GLISSEMENT. L'OUTIL UTILISE A CET EFFET EST DIMENSIONNE DE FACON QUE LE VOLUME DE MATIERE DES POINTES DE STRUCTURE 2 DEPASSANT LA SURFACE 18 ET DEPLACEES DANS LES ZONES VOISINES EN FORME DE CREUX 3 SOIT PLUS PETIT QUE LE VOLUME QUE PEUVENT RECEVOIR LES ZONES EN CREUX 3. LE LISSAGE SE PRODUIT DANS LE DOMAINE DE DEFORMATION PLASTIQUE DE LA MATIERE. CE PROCEDE PERMET DE REALISER SANS DIFFICULTE DES FILETAGES INTERIEURS DE TRES PETIT DIAMETRE ET D'OBTENIR UNE HAUTE QUALITE DE SURFACE, AVEC UNE EXCELLENTE PRECISION DIMENSIONNELLE.

Patent FR2287612B1

ANCHORING THREAD WITH SURFACE IMPRESSIONS

Patent FR2020014A6

SELF-TAPPING SCREW AND ITS MANUFACTURING PROCESS

Self-tapping screws

TAPPING SCREW

Method of threading shaft

The method involves forming an angled section (1c) on the material of the shaft to be threaded between a part to be machined (1a) of smaller diameter and a part of larger diameter (1b) which is not to be worked. A threading groove is formed on the part to be worked and dies (2) are used to form the groove. The dies have teeth (2a) to form the groove and a conical section (2b) is pressed against the angled section during roller forming of the thread. The conical section of the dies can have a larger angle than the angled section of the shaft.

Manufacture of threaded rods - and threaded hooks

The rods of circular cross-section are mfd. from mild steel contg. 0.15%C and are coated with a layer of Zn of thickness 30-50 mu. The thread is then applied by rolling onto suitable sections of rod. No subsequent coating with Zn is required.

Self-tapping threaded bushings

The disclosure relates to a threaded bushing which, upon entering and turning in the initially smooth bore of the work piece, will form through its own male thread the corresponding internal thread within the wall of the work piece bore. The bushing is formed with one or more exterior bevels or grooves which extend axially over at least several threads and intersect such threads to form spoon or cup-shaped frontal areas where each bevel or groove merges into a respective thread.

Hexagon flange torque shear bolt

본 고안은 원판형 플랜지와 육각머리가 일체로 형성되어 체결 후 해체나 보수공사시 분해가 용이한 육각플랜지 TS 볼트에 관한 것으로서, 육각머리(10); 및 The present invention relates to a hexagonal flange TS bolt that is easily formed by disassembling or repairing after fastening after the disk-shaped flange and the hexagonal head is formed integrally, the hexagonal head (10); And 상기 육각머리(10)의 하단면에 일체로 형성되고 육각머리(10)보다 큰 직경을 갖는 원판형 플랜지부(20);를 포함하고, 상기 플랜지부(20) 하단면에 나사산이 형성된 볼트몸체(30)가 형성되며, 축방향의 나사산이 형성되어 일정한 축력값에서 절단되는 절단노치부(40)가 상기 볼트몸체(30) 하단부에 형성되는 것을 특징으로 한다. And a disk-shaped flange portion 20 integrally formed on the bottom surface of the hexagonal head 10 and having a diameter larger than that of the hexagonal head 10. The bolt body has a thread formed on the bottom surface of the flange portion 20. 30 is formed, the cutting notch 40 is formed in the lower end of the bolt body 30 is formed in the axial direction thread is formed to cut at a constant axial force value.

Method of manufacturing a screw having a drilling tip, screw and rolling die

The method involves having a screw with a thread (7) bonded to a screw blank and having a drilling tip (5). The material is provided as a chip and displaced by a cut. After cutting the chip forms a groove (4). The groove is in parallel to the axis of the screw. Two grooves are diametrically provided. An independent claim is included for a screw, and a barrel jaw.

Thread forming member and method and apparatus for making the same

FASTENING

DEVICE FOR MANUFACTURING SELF-TAPPING SCREWS BY ROLLING A THREAD INTO A BLANK

SELF-DRILLING SCREW

Light alloy thread-forming screw and its production method

The invention provides a self-screwthread-forming screw comprising an artificially ageable light metal alloy as the screw material, whose shank is provided with a screwthread having screwthread flanks, and which is distinguished in that in at least one region of the screw by virtue of a differing heat treatment the material has a different structure from in the rest of the screw. The invention also provides a process for the production of a screw having the following process steps: forming the screw by rolling or cutting production of the screwthread geometry, solution heat treatment of the screw, quenching of the screw in water, and artificial ageing of the screw, in which the screw if subjected to differing heat treatment in various portions thereof.

Method and rolling die for producing a screw

The invention relates to a method for producing a screw, wherein a blank (16) is rolled between two rolling dies (24). A roll profile is implemented in each rolling die (24), comprising a plurality of longitudinal recesses (34). The rolling die (24) comprises a first and a second end (30, 32), spaced apart in the rolling direction, wherein the blank (16) is displaced relative to the rolling die (24) from the first end (30) toward the second end (32) while rolling. The average pitch of the center lines of the recesses (34), defined as the quotient of the changes in positions of the center lines in the direction transverse or parallel to the rolling direction, is different in an area of the first end (30) of the rolling die (24) than the average pitch in an area of the second end (32) of the rolling die opposite the area of the first endas seen in the rolling direction.

Self-tapping screw, blank, method and dies for making the same and method for joining thin workpieces

A headed multi-lobed blank, method of manufacturing a self-tapping screw fro m the blank, and resulting multi-lobed self-tapping (902) screw for joining th in workpieces (1402,1404) provides desirable thread-forming characteristics at the conical tip and body portions, and improved resistance to vibrational loosening near the head. The resulting screw, obtained from the blank and method, incorporates a threaded tapered root portion (906) between the screw head (410) and body por-tion having a cross section that varies from nearly circular in the area adjacent to the under-side of the head (410) to a maxim um out-of-round (or lobular) cross section at the intersection of the tapered root portion (906) and the screw body. This shape, combined with a thread profile outer diameter that remains largely constant from the body portion through the tapered root portion (906), and a multiple coil (lead threaded) shape, ensure more secure holding of the screw (902) in a thin anchor materi al (1404) - with the anchor material extruded axially forward and backward (140 5) around the root portion.

Self-tapping screw and method of manufacturing the same.

Un tornillo auto-roscante de acuerdo con la presente invención incluye una cabeza y un fuste que se extiende desde la cabeza. El fuste incluye un fuste cilíndrico inmediatamente bajo la cabeza y un fuste cónico truncado que sigue un extremo del fuste cilíndrico, el fuste cilíndrico se proporciona con una pluralidad de primeras roscas externas, y el fuste cónico truncado se proporciona con una pluralidad de segundas roscas externas que siguen las primeras roscas externas, y un pico de cada una de las segundas roscas externas se proporciona con una superficie de penetración que tiene una forma cóncava-convexa.

Thread rolling assembly

Cold-forming equipment configured as a high precision thread rolling assembly utilizing racks, guide rails, a bearing assembly including rolling element linear motion bearings and a gear reduction assembly.

Fastener manufacturing method

A method of manufacturing a threaded fastener of the self-tapping type where the fastener thread is impregnated with a harder substance than the metal from which the fastener is made by utilizing a thread-rolling machine with an impregnating electrode. A method of making the fastener pilot tip end impregnated is also described.

Rolling method and rolling tools

Serration rolling tools and thread rolling tools each having groups of leading teeth, finishing teeth and disengaging teeth are provided, a lead angle of the thread rolling tool being set in accordance with the rolling diameter of the serration section in a work piece. The thread rolling tool and serration rolling tool are arranged parallel and integrally. First a rolling operation for forming serrations is started by the serration rolling tools, a rolling operation for forming threads being started by the thread rolling tools in the course of the rolling operation by the group of the leading teeth of the serration rolling tools. A rolling operation for finishing the threads is completed in the latter half of the rolling operation by the group of the finishing teeth for the serrations. The difference in rolling diameters is absorbed by the slide of the aforesaid thread rolling tools on a shaft member (work piece), thus enabling the simultaneous formation of serrations and threads in a short rolling stroke.

Rolling machine

According to the present invention, a rolling machine comprises: a driving means (200) having a wheel (220) rotated by a motor; a link unit (300) wherein one side thereof is rotatably connected to the wheel (220) and the other side thereof is rotatably connected to a moving main body (400) to convert a rotational motion of the wheel (220) into a reciprocating motion of the moving main body (400); the moving main body (400) which is connected to the link unit (300) to reciprocate and has a moving mold (410); and a fixed main body (500) which is separated from the moving main body (400) and has a fixed mold (510) to roll a workpiece with the moving mold (410). The link unit includes: an adjustment main body having an arm groove connected to the wheel, opened towards an adjustment arm, and extended in a longitudinal direction; a fixing means positioned on an outer side of the arm groove of the adjustment arm; the adjustment arm wherein one side thereof is connected to the moving main body and the other side thereof is screwed to the fixing means and slidably inserted into the arm groove; and an adjustment means arranged on the adjustment main body and inserted into the adjustment arm to adjust a length of the adjustment arm. The adjustment means can make fine adjustments to improve quality and facilitate work.

Fastening screw and method of forming same

Screw

Fastener having a lobular cross section and ridges along the thread axis

A fastener is constructed having four thread zones (4, 5, 6, 7) constructed over the length of the fastener (1), from the head (2) to the tip (10), namely a ridged cylindrical holding zone (4), a ridged cylindrical transition thread forming zone (5), a rectilobular tapered thread forming zone (6), and a rectilobular alignment zone (7). The pitch cross section of the thread varies in each zone.

Self-locking threaded fastener

SELF-LOCKING THREADED FASTENER ABSTRACT A self-locking fastener combination is pro vided with a thread construction having a thread which deforms to securely lock when a set of male and female members are threaded together and which is reformed upon unthreading of the members to allow subsequent reuse thereof. The female member is provided with a conventional thread while the male member has a special helical thread defined by leading and trailing flanks in which a portion of the leading flank diverges away from the leading flank of the fe-male member to produce a space between the threads at the male thread root. A portion of the male thread root is truncated and is of lesser depth than the female thread such that part of the female thread crest firmly engages and is deformed by the trun-cated male thread root into the space adjacent such root when the members are threaded together. The deformed female thread crest produces firm metal-to-metal contact between the members completely around several revolutions of the circumference of the threads in order to preclude lateral movement of one member relative to the other and resultant loosening of the fastener when subjected to vibration.

Clamp and its manufacture

Thread-forming tool

Self-tapping screw and method of manufacture

Self-Drilling Screw

A self-drilling screw is provided which is suitable for use with both thick section metal plate and thin section metal sheet. The screw is formed from a blank 1 which includes a shank 2 extending between a head 3 and drilling top 4. The shank 2, adjacent the head 3, is formed with a frusto-conical enlargement 8. A thread 10, when formed in shank 2 is extended into enlargement 8 to create a final part 11 of the thread which, in use of the screw with sheet metal 12, distorts the sheet metal such that it firmly locks onto the enlargement 8. A shallow recess 6 is provided in the underside of head 3 surrounding the frusto-conical enlargement 8.

Thread forming fastener

FOERFARANDE FOER FRAMSTAELLNING AV EN SJAELVGAENGANDE SKRUV OCH ETT VALSNINGSBACKPAR FOER UTFOERANDE AV FOERFARANDET

Self-thread forming threaded fasteners and method for making same

A self-thread forming threaded fastener has a straight thread on a shank of circular cross section and a tapered thread on a workentering end. The tapered portion of the thread is of lobular root, pitch and crest surface cross sections and which lobular configuration is continued, but to a diminishing extent, on the first few threads on the shank immediately adjacent to the tapered section. The fastener is formed by rolling between thread-rolling dies a blank having a cylindrical shank of circular cross section and an end section of arcuate lobular cross section including a tapered portion. The cylindrical shank may include a reduced diameter section adjacent to the end section. At least the lobular and tapered portions of the blank are intermittently deflected first in one direction and then in the opposite direction by the dies. Due to such deflections of the end of the blank, a lobular tapered thread is produced on the tapered portion of the blank. The reduced diameter section prevents the thread crest formed therein from being radially outwardly of the crest of the round thread on the shank.

With the fastener for cleaning and smoothing alar part

紧固件、形成紧固件的方法以及使用紧固件将工件紧固到基体上的方法。实施例包括在头部下方具有结构特征的紧固件。结构特征的上延伸部在平行于紧固件头部前导表面的平面上。实施例包括在头部与结构特征之间的垫圈。结构特征可包括切割边缘，用于切割和/或铰削工件的一部分。

SELF-THREADED MOUNTING DEVICE

Threaded connection, in particular locking screw

Thread rolling dies and process for forming same

Thread forming dies to form a continuous helical thread for a metal fastener. The dies are designed and constructed to eliminate laps and discontinuities in the thread form particularly in larger diameter fastener blanks. The dies are constructed by calculating a roll-off section which tapers down to expel the threaded fastener then determining the length of a dwell section having a full depth grooves to create a well-defined and stable thread. Finally, a roll-up ramp section is calculated along which the grooves of the die become deeper along its length until reaching the desired thread angle and depth. The thread forming dies include a stationary die and a moving die. The fastener blank is rolled therebetween causing the die faces to form the thread as the blank moves from the roll-up section, through the dwell section and out the roll-off section.

Threaded mold realizing firm installation

本发明公开了安装牢固的螺纹模具，包括上模本体和下模本体，所述上模本体上设置多个上模牙，每个上模牙的形状为梯形，在每个上模牙的外表面上还设置梯形螺纹；所述下模本体上与上模本体相邻面上还设置多个V形槽，V形槽体的大小与上模牙的大小相匹配。本发明通过上述结构，避免出现螺纹旋合太松即滑牙，螺纹旋合太紧则旋不进，制件螺纹的间隙更易配合，不同批次制件螺纹的互换性提高，进一步降低了配件损耗。

Patent JPS524690B1

A THREAD FORMATION SCREW

Method and apparatus for producing threaded self-tapping stainless steel screws

Case 3395 00 METHOD AND APPARATUS FOR PRODUCING THREADED SELF-TAPPING STAINLESS STEEL SCREWS Abstract of the Disclosure A process for producing self-tapping screws from an austenitic 300 series stainless steel material wherein a blank of such material is chilled prior to a thread rolling operation so that the threads are formed while the blank is in a chilled condition. A preferred apparatus for practicing such a method utilizes an insulated tunnel surrounding the feed track which leads to the thread roller. Fluid refrigerant is fed to the interior of the tunnel to chill the blanks immediately prior to the thread rolling operation.

Odd-shaped screw and its manufacture

(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 making self-tapping screws

1,141,312. Making self-tapping screws. C. F. JENSEN. 8 June, 1966 [8 June, 1965], No. 25628/66. Headings B3A and B3N. Self-tapping screws are produced by cutting or rolling a screwthread with a flat root, on to the surface of a rod 1, Fig. 11, having grooves 2. The thread may be backed off at 18, and the cutting edges may have a positive rake angle x. The screw may have a head (11), Fig. 3 (not shown), a plain or screwed bore, Figs. 5, 6 (not shown), a pilot end (16), and a hexagonal recess (15), Fig. 9 (not shown).

THREAD FORMING FASTENER

Fastening screw for prosthetic components in implantodontics

Self-tapping screw and method of manufacturing the same

Self-tapping screw, blank and method for joining thin workpieces and production method for the same

A headed multi-lobed blank, method of manufacturing a self-tapping screw from the blank, and resulting multi-lobed self-tapping screw for joining thin workpieces provides desirable thread-forming characteristics at the conical tip and body portions, and improved resistance to vibrational loosening near the head. The resulting screw, obtained from the blank and method, incorporates a threaded tapered root portion between the screw head and body portion having a cross section that varies from nearly circular in the area adjacent to the underside of the head to a maximum out-of-round (or lobular) cross section at the intersection of the tapered root portion and the screw body. This shape, to combined with a thread profile outer diameter that remains largely constant from the body portion through the tapered root portion, and a multiple coil (lead thread) shape, ensure more secure holding of the screw in a thin anchor material—with the anchor material extruded axially forward and backward around the root portion.

Screw with drill

一种螺钉,具有螺钉头,螺钉杆和螺纹,螺钉包含尖部,在尖部螺纹终止。螺纹没有延伸到螺钉尖。从螺钉尖部开始的区域有两个相对的刃口,它在拧入螺钉的最初没有螺纹接合时钻一个孔。这种螺钉在快速拧入过程中防止可能发生的破裂。

Thread-forming devices and method for manufacturing same

1,009,447. Making screws; self-tapping screws. RESEARCH ENGINEERING & MANUFACTURING Inc. Oct. 27, 1961, No. 38447/61. Headings B3A and B3N. A thread-forming member such as a selftapping screw is made by forming a blank of symmetrical arcuate polygonal cross-section of generally uniform width, and rolling a thread on the blank so that the radius of curvature of each side remains greater than the width of the cross-section. This results in a screw requiring a low driving torque but having a high resistance to thread stripping under load. Fig. 18 shows a cross-section of a screw similar to that in Fig. 1, the radii of the sides 102-104 and lobes 108-110 being shown, and also the difference 116 termed K between the pitch cylinder of the screw and that of the tapped hole. Formulµ expressing these radii in terms of K are given, defining the preferred range of dimensions. The blank may be five sided or have no lobes and the screw can be self-locking, Fig. 25, the pitch circles of the threads here forming a cylinder and the threads 57 being partly formed. Specification 957,675 is referred to.

Self-tapping screw, blank, method and dies for making the same and method for joining thin workpieces

머리가 부착된 복수의 (headed) 로브 형상의 블랭크, 그 블랭크로부터 셀프 태핑 나사(902)를 제조하는 방법, 그리고 원뿔형 단부와 몸체 부분들에서 만족스러운 나사산 성형 특징들을 나타내는 것으로서 얇은 소재들(1402, 1404)을 결합하기 위한 결과적인 다수의 로브 형상의 셀프 태핑 나사를 제공함으로써 선행 기술의 단점들을 극복한다. 그 결과적인 나사는, 그 블랭크와 방법에 의하여 얻어지는데, 머리(410)의 저부에 인접한 지역에서 거의 원형인 것으로부터 테이퍼진 뿌리 부분(906)과 나사 몸체의 교차점에서 최대로 원형이 일그러진 단면까지 변화하는 단면을 갖는 것으로서, 나사 머리(410)와 몸체 부분 사이에 있는 나사줄(threaded) 테이퍼진 뿌리 부분(906)을 통합한다. 몸체 부분으로부터 테이퍼진 뿌리 부분(906)에 걸쳐 거의 일정하게 유지되는 나사산 단면의 외경과 조합되는 이 형상과, 복수의 나선형(helical) 코일(리이드 나사산) 형상은, 뿌리 부분 주위에서 축방향으로 전방 및 후방(1405)으로 돌출되는 고정재과 함께, 얇은 고정재(1404)에서 나사(902)의 보다 안전한 쥠(holding)을 보장한다. A headed lobed blank with a head attached thereto, a method of manufacturing the self-tapping screw 902 from the blank, and thin materials 1402, 1404 by providing a resultant plurality of lob shaped self-tapping screws. The resulting screw is obtained by its blank and method, from the substantially circular in the area adjacent to the bottom of the head 410 to the section of the tapered root portion 906, at the intersection of the threaded body, Threaded tapered root portion 906, which has a varying cross-section, between the threaded head 410 and the body portion. This shape and a plurality of helical coils (lead thread) shapes, which are combined with the outer diameter of the threaded cross section maintained substantially constant over the body portion to the tapered root portion 906, And securement of the screws 902 in the thin fasteners 1404 together with the fasteners projecting to the back 1405.

Pair of thread rolling jaws for producing offset threads

HEITANNA SOKUMENOJUSURUTATSUPINNEJI

Self-closing blind fastener

(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。

Die for rolling de-pitched prevailing-torque screw - has two equal-pitch undulating sections separated by greater-width parallel crest

The die is intended for use in conjunction with a complementary die for rolling screw thread of a de-pitched prevailing-torque screw bolt and is of the type having a first and a second section with parallel cruciform-pitch hill (5)-and-dale (4) corrugations, the corrugations of the first section being out of phase relative to those of the second section. The two sections are separated by a region (6) which is parallel to the corrugations and which is preferably formed as a rib (6) whose width is greater than that of each hill (5) of the corrugations. The thread produced by these dies has no abrupt interruption.

Self-locking screw device

Thread rolling die and surface treatment method for thread rolling dies

In a thread rolling die, which is a tool for rolling threads and the like, a primary hard film (C1) with a high degree of hardness, consisting of an electrode wear melting substance or a reaction product thereof is formed on a rolling edge face (Wb) by a primary discharge surface treatment; a secondary hard film (C2) made self-lubricating by a secondary discharge surface treatment is formed over it; and the rolling edge face (Wb) is thereby coated with the hard films of multi-layered structure of different materials.

METHOD TO MANUFACTURE INDEPENDENT FIXING ELEMENTS AND MATRIXES FOR IMPLEMENTATION OF THE SET