EP0796680B1 - Perfectionnement pour procédé de réalisation de goujons ou tirants filetés - Google Patents

Perfectionnement pour procédé de réalisation de goujons ou tirants filetés Download PDF

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Publication number
EP0796680B1
EP0796680B1 EP97410029A EP97410029A EP0796680B1 EP 0796680 B1 EP0796680 B1 EP 0796680B1 EP 97410029 A EP97410029 A EP 97410029A EP 97410029 A EP97410029 A EP 97410029A EP 0796680 B1 EP0796680 B1 EP 0796680B1
Authority
EP
European Patent Office
Prior art keywords
groove
rolling
thread
diameter
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97410029A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0796680A1 (fr
Inventor
Eric Bedouet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0796680A1 publication Critical patent/EP0796680A1/fr
Application granted granted Critical
Publication of EP0796680B1 publication Critical patent/EP0796680B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/022—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling combined with rolling splines, ribs, grooves or the like, e.g. using compound dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/04—Making by means of profiled-rolls or die rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
    • B21H7/187—Rolling helical or rectilinear grooves

Definitions

  • the present invention relates to a process for obtaining by deformation of a threaded rod provided with a locking groove, the device intended to implement said process as well as the threaded rod obtained by this process.
  • the deformation threading processes consist in performing a thread by plastically deforming the envelope or external surface of a cylindrical rod.
  • One can during this plastic deformation obtain a diameter at the top of the thread greater than the initial pitch diameter of said rod, itself greater than the diameter at the bottom of the thread, the material being moved from the bottom of the nets to form the top of the nets.
  • a tie rod or a so-called reduced rod stud the diameter of the unthreaded part being equal to the diameter of the thread flank.
  • Such threaded rods of the stud or pulling type during their implantation, pose a major drawback when tightening, such a stud or pulling reduced stem thus tends to implant along a random length before being blocked.
  • tie rods or studs of the normal rod type i.e. tie rods or studs whose diameter of the smooth part is equal to or greater than diameter at the top of the threaded part.
  • the process of manufacturing requires that a reduction be made before deformation in diameter of the part intended to be deformed for the realization of the thread.
  • the improvement provided by the present invention is therefore proposes to allow obtaining the thread and the groove deformation blocking ring simultaneously to avoid a rework of the part, causing a loss of time which, when of the production in high quantity of this type of studs or tie rods, can become very important.
  • the method of producing a rod comprising at least one thread produced by deformation is characterized in that it consists in making an annular groove for blocking by deformation, said blocking groove having a diameter at the bottom of groove greater than the diameter at the bottom of the net.
  • the thread and the groove blocking ring are made simultaneously, by a process rolling nets. While it consists in making said groove locking ring, so that it is positioned between the thread of the rod and its non-threaded part.
  • the rolling tool intended to implement the method is characterized in that said groove rolling disc has a projection rolling circular, and the external diameter of said projection is less than diameter measured at the top of the thread of the external rolling thread, said groove rolling disc have a circular rolling projection of rounded shape at the top.
  • the reduced rod studs obtained by the process are characterized in that the annular blocking groove is located between the threaded part and the non-threaded central part, while the diameter measured at the bottom of the groove is greater than the diameter measured in bottom of the net.
  • Figures 1 and 2 show a rolling tool allowing the implementation of the process as well as the diagram of the rolling of nets by such a tool.
  • FIG. 1 represents a rolling head or laminator seen from profile.
  • Figure 3 shows a wheel in longitudinal section.
  • Figure 4 shows a detail of Figure 1 concerning the part of the tool intended to produce the annular locking groove.
  • Figures 5, 6 and 7 relate to an example of a stud-type threaded rod obtained by the process according to the invention.
  • FIG. 5 is an example of a stud with a reduced rod whose ends are chamfered.
  • Figure 6 is another stud with reduced rod whose ends are gross rolling.
  • FIG. 7 shows in detail the annular groove for blocking the stud in longitudinal section.
  • the improvement of the process for producing a rod threaded type studs or tie rods consists of performing by deformation on said threaded rod (1) an annular locking groove (2).
  • said method annular locking groove (2) is produced simultaneously with the thread of the threaded rod (1) by deformation according to a thread rolling process.
  • This rolling process can advantageously be according to the mode of placing.
  • a rolling head (3) comprising at least two rollers (4a, 4b) of rolling, as illustrated in Figures 1 and 2.
  • it can also be type with three or more wheels or planetary (a wheel turning in front a fixed concave sector) or with flat matrices, without leaving the part of the invention.
  • the process therefore consists in carrying out by rolling on a rod at minus a thread (5) and an annular locking groove (2), so that that said groove (2) is positioned between the thread (5) and the part of unthreaded rod (6).
  • Said annular locking groove (2) is made so that the diameter at the bottom of the groove D1 is greater than the diameter at the bottom of the thread D2, as illustrated in FIG. 5 and FIG. 7, in order to avoid the possible problems of rupture caused by the realization of a circular groove and therefore of a critical section for resistance to longitudinal traction perpendicular to said section.
  • it consists in carrying out an annular locking groove (2) whose width measured at its vertex is greater than the pitch of the adjacent thread (5) produced by said rolling process.
  • the method advantageously consists in making the thread (5) and the groove annular blocking (2) on a rod (1), so as to obtain a stud, a tie rod or a threaded rod, called a reduced rod, that is to say the diameter D3 of the non-threaded portion (6) is substantially equal to diameter flank D8.
  • the device for implementing the method according to the invention is composed of a rolling tool (7) which can be of the flat die type, planetary or rolling heads (3) with rollers (4).
  • said dies are provided with a longitudinal projection intended to obtaining the annular groove, said projection having an angle (not zero) with the oblique penetration projections intended to obtain the thread.
  • the rolling tool is of the planetary type and includes a wheel equipped with a flange or rolling disc of groove for performing an annular locking groove (2) during the rotation of said wheel (4) in front of a fixed concave sector.
  • the rolling tool (7) intended to be used during the setting mode preferred implementation of the method is a tool having at least two wheels (4a, 4b) mounted on a rolling head (3), as illustrated in figure 1, said tool working while diving, that is to say during a process of rolling of the radial or tangential type.
  • Said tool can, for example, include three or more knobs (4), without going beyond the ambit of the invention.
  • rollers (4) of the rolling head (3) intended to set works the preferred mode of the process are cylindrical and have along their length an external rolling thread (8) intended to make the thread (5) of the rod (1) causing the formation during rolling said thread (5) by deformation of the surface of the blank cylindrical of the rod (1), deformation due to the penetration of the threads of said external rolling thread (8) in said surface.
  • knobs (4) have at their ends (10a, 10b), in a manner known per se, a chamfer (11) an angle or an entry radiated allowing the release of the deformed material during rolling at the start and end of the net.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
EP97410029A 1996-03-19 1997-03-11 Perfectionnement pour procédé de réalisation de goujons ou tirants filetés Expired - Lifetime EP0796680B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9603770 1996-03-19
FR9603770A FR2746331B1 (fr) 1996-03-19 1996-03-19 Perfectionnement pour procede de realisation de goujons ou tirants filetes

Publications (2)

Publication Number Publication Date
EP0796680A1 EP0796680A1 (fr) 1997-09-24
EP0796680B1 true EP0796680B1 (fr) 2002-10-02

Family

ID=9490569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97410029A Expired - Lifetime EP0796680B1 (fr) 1996-03-19 1997-03-11 Perfectionnement pour procédé de réalisation de goujons ou tirants filetés

Country Status (7)

Country Link
EP (1) EP0796680B1 (da)
AT (1) ATE225220T1 (da)
DE (1) DE69715944T2 (da)
DK (1) DK0796680T3 (da)
ES (1) ES2184975T3 (da)
FR (1) FR2746331B1 (da)
PT (1) PT796680E (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007062437A1 (de) 2007-12-20 2009-10-08 Profiroll Technologies Gmbh Walzwerkzeug zum Kaltwalzen von Profilrollen mit unterschiedlicher Profilierung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103028683B (zh) * 2012-12-27 2015-04-08 金湖县常盛动力机械配件有限公司 滚轮销卡簧槽的加工方法及其刀具装置
FR3009218B1 (fr) * 2013-07-31 2016-01-01 Decorec Vis a couple de serrage limite
US11761489B2 (en) 2019-06-14 2023-09-19 Gkn Driveline Deutschland Gmbh Gear-tooth system and shaft/hub connection component

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL112348B (da) * 1942-01-05
DE954865C (de) * 1954-06-25 1956-12-27 Teves Kg Alfred Verfahren zum Herstellen eines durch einen Bund begrenzten Einschraubendes an einem zylindrischen Teil
JPS5897453A (ja) * 1981-12-03 1983-06-09 Satake Tekko Kk コンクリ−ト型枠用セパレ−タの製造方法
JPH03161136A (ja) * 1989-11-14 1991-07-11 Shinjiyou Seisakusho:Kk コンクリート用アンカーボルトの製造方法及び該アンカーボルトの製造に用いる装置
DE4024563A1 (de) * 1990-08-02 1992-02-06 Itw Ateco Gmbh Verfahren zur herstellung einer kugelkopfschraube und vorrichtung zur durchfuehrung des verfahrens
JP2643574B2 (ja) * 1990-10-03 1997-08-20 トヨタ自動車株式会社 テンションボルトの製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007062437A1 (de) 2007-12-20 2009-10-08 Profiroll Technologies Gmbh Walzwerkzeug zum Kaltwalzen von Profilrollen mit unterschiedlicher Profilierung

Also Published As

Publication number Publication date
PT796680E (pt) 2003-02-28
DE69715944D1 (de) 2002-11-07
FR2746331A1 (fr) 1997-09-26
DK0796680T3 (da) 2003-02-10
ATE225220T1 (de) 2002-10-15
DE69715944T2 (de) 2003-08-28
EP0796680A1 (fr) 1997-09-24
ES2184975T3 (es) 2003-04-16
FR2746331B1 (fr) 1998-05-15

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