EP0189447B1 - Procede de forgeage - Google Patents

Procede de forgeage Download PDF

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Publication number
EP0189447B1
EP0189447B1 EP85903281A EP85903281A EP0189447B1 EP 0189447 B1 EP0189447 B1 EP 0189447B1 EP 85903281 A EP85903281 A EP 85903281A EP 85903281 A EP85903281 A EP 85903281A EP 0189447 B1 EP0189447 B1 EP 0189447B1
Authority
EP
European Patent Office
Prior art keywords
teeth
upsetting
tooth
tips
semi
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
Application number
EP85903281A
Other languages
German (de)
English (en)
Other versions
EP0189447A1 (fr
Inventor
Anton Schmid
Georg Tauschek
Andreas Sedlmeier
Peter Pollok
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.)
BLW Praezisionsschmiede GmbH
Original Assignee
Bayerische Leichtmetallwerk Graf Bluecher Von Wahlstatt KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bayerische Leichtmetallwerk Graf Bluecher Von Wahlstatt KG filed Critical Bayerische Leichtmetallwerk Graf Bluecher Von Wahlstatt KG
Priority to AT85903281T priority Critical patent/ATE33772T1/de
Publication of EP0189447A1 publication Critical patent/EP0189447A1/fr
Application granted granted Critical
Publication of EP0189447B1 publication Critical patent/EP0189447B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/30—Making machine elements wheels; discs with gear-teeth
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49462—Gear making
    • Y10T29/49467—Gear shaping
    • Y10T29/49474—Die-press shaping

Definitions

  • the invention relates to a method for producing a synchronizing component provided with short teeth with undercut teeth for manual transmissions by precision forging, the teeth, each of which is attached to a common cylinder surface with its radially inner side and is placed with its foot on a common lower plane surface be produced with parallel tooth flanks and then fully compressed.
  • Such a method for the production of power transmission with claws or pockets is known from DE-A1-3 134 857.
  • Claws are produced there during forging, the top surfaces of which are produced with oversize at least along their edges common to the coupling surfaces.
  • the desired inclination of the coupling surfaces is achieved by a subsequent calibration stroke.
  • the claws When calibrating, the claws can be supported between die surfaces running transversely to the coupling surfaces.
  • the present invention has for its object to enable the unrestricted application of the known method to synchronous components of the type mentioned and to achieve increased accuracy in the formation of the coupling surfaces.
  • Process step a) can be carried out by cold or hot forging; Equivalent cold extrusion is also an option.
  • Method step b which relates to one or more calibration strokes, comprises a three-stage deformation by calibration, so it differs fundamentally from the prior art mentioned.
  • aa the tooth heads produced with an oversize in the direction of the tooth length are first pre-compressed; the straight ones remain, i.e. in radial planes with respect to the tooth flanks running common to all teeth, essentially still preserved. There is a material compression, which then acc. To the second calibration stage.
  • Feature bb) leads to strain hardening, particularly in the foot area of the teeth supported by the lower flat surface. This strain hardening in the foot area is not only very important for the precise shaping of the tooth root fillet; their special effect is that they are gem.
  • Feature cc) controls the slope of the tooth flanks forming the coupling surface exactly.
  • the angle of the tooth flanks and the flank shape accuracy it may be appropriate to support the tooth flanks on the die side.
  • the roof shape of the tooth tips which is characteristic of short toothing, is finished, the tooth flanks receiving their final slope.
  • the cylinder surface in the region of the tooth heads is limited by an upper plane surface over which the semifinished product tooth heads protrude with at least a part of their oversize and that the teeth deform in such a way during the final upsetting that the tooth tips end in or below the upper flat surface.
  • the degree of deformation during upsetting of the tooth heads is to be controlled in such a way that the teeth formed on the semi-finished product are sheared off the cylinder surface in an area lying between the upper flat surface and the finished tooth head shape, at the latest during the final upsetting.
  • the sheared material is formed to form the oblique tooth flanks in the direction of the tooth gap; the cylinder surface common to all teeth forms an effective support surface which does not prevent deformation and which can be unconnected to the tooth in the region of the largest tooth width.
  • the half section shown in FIG. 1 through a synchronous component 1 with a central bore 2 selected from a large number of possible variants shows an annular body 3 shown with a hatched cross section, on which a cylindrical surface 6 is formed between an upper flat surface 4 and a lower flat surface 5.
  • the teeth 7 of a short toothing are attached to the cylindrical surface 6, a total of four segments 8 with five teeth each attached to it being provided distributed over the circumference of the synchronous component 1.
  • the middle tooth representation acc. FIG. 2 shows a finished tooth 7 (in solid lines) and a forged tooth (in dashed lines) according to the right-hand shape cc) of the semi-finished product.
  • the middle tooth representation is intended to demonstrate the degree of deformation from pre-forging to final calibration. This is particularly clear from the presentation acc. Fig. 3 shows. 3, the cylindrical surface 6, projected into the plane, is shown between two dashed lines.
  • the respective deformation from deformation stage aa) for pre-forging to bb) for pre-upsetting and further to cc) for finished upsetting is exaggerated to illustrate the situation.
  • the latter two process stages take place within the calibration process, namely through one or more calibration beats.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Gears, Cams (AREA)

Abstract

Un procédé pour la production d'un composant synchrone à denture courte, possédant des dents à contre-dépouille pour un système d'engrenage, consistant en un forgeage précis pendant lequel les dents qui sont placées avec leur côté intérieur radial contre une surface cylindrique commune, et avec leur base sur un plan inférieur commun, sont d'abord réalisées avec des flancs de denture qui sont parallèles et ensuite subissent un refoulement de finition, ce procédé permettant d'obtenir une forme des surfaces d'engrenage particulièrement précise, les étapes suivantes du procédé étant importantes: a) un produit semi-fini est réalisé par forgeage préliminaire, dont la denture courte possède des dents (7) ayant une dimension qui dépasse la dimension finie des sommets des dents (10); b) grâce à une ou plusieurs passes de calibrage, le semi-produit froid est formé de manière à ce que 1) premièrement, les sommets des dents (10) soient refoulés, les dents étant maintenues sur leurs côtés externes radiaux de côté du forgeage; ii) en même temps que se fait le refoulement préliminaire, ou au moyen d'une passe de calibrage supplémentaire, en arrondissant les flancs de denture (9) au plan inférieur (5), l'on effectue un renforcement à froid des bases correspondantes des dents (7) et iii) quand le refoulement de finition est terminé, les sommets des dents possèdent la forme d'un toit, les flancs de denture étant disposés dans une position oblique correspondant leur contre-dépouille.

Claims (3)

1. Procédé pour la fabrication d'un composant synchrone muni d'une denture courte avec dents contre- dépouillées, pour changements de vitesse, par forgeage précis, dans lequel les dents, qui sont accolées chacune par leur côté intérieur radialement à une surface cylindrique commune et sont posées par leur pied sur une surface plane inférieure commune, sont tout d'abord fabriquées avec des flancs de dent dirigés parallèlement et ensuite finies par refoulement, caractérisé par les étapes de procédé suivantes:
a) Par ébauchage, on fabrique un semi-produit dont la denture courte présente des dents (7) ayant une dimension supérieure à celle de la tête de dent finie (10).
b) Par un ou plusieurs coups de calibrage successifs, on agit sur le semi-produit froid de telle sorte que:
aa) on ébauche tout d'abord par refoulement les têtes de dent (10), les dents se soutenant mutuellement du côté de la matrice, à leurs côtés radiaux extérieurs,
bb) en même temps que l'ébauchage par refoulement, ou par un-autre coup de calibrage, par arrondissement des flancs de dent (9) vers la surface plane inférieure (5), on provoque un écrouissage, chaque fois dans la région de pied des dents (7) et
cc) lors du finissage par refoulement, les têtes de dent prennent une forme de toit et les flancs de dent acquièrent la position oblique correspondant à leur contre-dépouille.
2. Procédé selon la revendication 1, caractérisé par le fait que la surface cylindrique (6) est limitée dans la région des têtes de dent par une surface plane supérieure (4) au-delà de laquelle les têtes de dent du semi-produit s'avancent par au moins une partie de leur surmesure et que lors du finissage par refoulement, on déforme les dents (7) de telle sorte que les têtes de dent se terminent à la hauteur ou en dessous de la surface plane supérieure (4).
3. Procédé selon la revendication 2, caractérisé par le fait que lors du refoulement des têtes de dent, au plus tard pendant le finissage par refoulement, on sépare par cisaillement,de la surface cylindrique (6), les dents constituées sur le semi-produit, dans une région (13) située entre la surface plane supérieure (4) et la forme finie de tête de dent.
EP85903281A 1984-07-24 1985-07-08 Procede de forgeage Expired EP0189447B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85903281T ATE33772T1 (de) 1984-07-24 1985-07-08 Schmiedeverfahren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3427156 1984-07-24
DE3427156A DE3427156C2 (de) 1984-07-24 1984-07-24 Verfahren zum Herstellen eines Synchronteils mit hinterschnittenen Zähnen

Publications (2)

Publication Number Publication Date
EP0189447A1 EP0189447A1 (fr) 1986-08-06
EP0189447B1 true EP0189447B1 (fr) 1988-04-27

Family

ID=6241368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85903281A Expired EP0189447B1 (fr) 1984-07-24 1985-07-08 Procede de forgeage

Country Status (14)

Country Link
US (1) US4700446A (fr)
EP (1) EP0189447B1 (fr)
JP (1) JPS61502736A (fr)
BR (1) BR8506856A (fr)
CA (1) CA1249458A (fr)
CS (1) CS259530B2 (fr)
DE (2) DE3427156C2 (fr)
ES (1) ES8701549A1 (fr)
HU (1) HU198139B (fr)
IL (1) IL75883A (fr)
IN (1) IN164593B (fr)
WO (1) WO1986000838A1 (fr)
YU (1) YU45265B (fr)
ZA (1) ZA855513B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011111216A1 (de) 2011-08-20 2013-02-21 Sona Blw Präzisionsschmiede Gmbh Synchronring
DE102011088864A1 (de) 2011-12-16 2013-06-20 Cdp Bharat Forge Gmbh Kaltkalibrierpresse für Monoblockschalträder mit einbaufertiger Kupplungsverzahnung
EP3273084B1 (fr) 2016-07-22 2022-03-30 Diehl Metall Stiftung & Co. KG Bague de synchronisation

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2600274B1 (fr) * 1986-06-18 1990-03-09 Garconnet Michel Procede pour la realisation de pignons dont le bord d'attaque des dents forme un angle a arete vive
US5230134A (en) * 1992-02-11 1993-07-27 Laue Charles E Method of making a petal rod
DE4220523A1 (de) * 1992-06-23 1994-01-05 Hirschvogel Umformtechnik Gmbh Verfahren zum Herstellen eines einen Preßabschnitt aufweisenden Werkstücks und Vorrichtung zur Durchführung des Verfahrens
US5606790A (en) * 1993-04-09 1997-03-04 Charles E. Laue Method of making a two piece pedal rod
US5425286A (en) * 1993-04-09 1995-06-20 Laue; Charles E. Two piece pedal rod and method of making same
CH690565A5 (de) * 1995-04-10 2000-10-31 Feinstanz Ag Verfahren zur Herstellung von Getriebebauteilen mit Zähnen mit Dachform und Hinterschnitt.
AU7552796A (en) * 1995-10-31 1997-05-22 Colfor Manufacturing Inc. Apparatus and method for forging a pinion gear with a near net shape
DE19624774C2 (de) * 1996-06-21 2000-06-08 Blw Praezisionsschmiede Gmbh Kupplungsverzahnung in einem Schaltgetriebe
DE19744639B4 (de) * 1997-08-13 2007-03-01 Hirschvogel Umformtechnik Gmbh Verfahren zum Herstellen eines Schaltzahnrades, Vorrichtung zur Durchführung des Verfahrens und nach dem Verfahren hergestelltes Schaltzahnrad
WO1999008820A1 (fr) * 1997-08-13 1999-02-25 Hirschvogel Umformtechnik Gmbh Procede pour la fabrication d'un pignon de changement de vitesses, dispositif pour la mise en oeuvre de ce procede et pignon de changement de vitesses realise selon ce procede
DE19820654B4 (de) * 1998-05-08 2006-11-23 Schaeffler Kg Schiebemuffe einer Synchronisiereinheit für Schaltgetriebe
DE10021088A1 (de) * 2000-04-28 2001-11-08 Johann Hay Gmbh & Co Kg Automo Schiebemuffe für ein Schaltgetriebe und Verfahren zu deren Herstellung
EP2508274B1 (fr) * 2011-04-05 2013-07-17 Feintool Intellectual Property AG Procédé et dispositif d'augmentation de la surface de portée d'une pièce obtenue par découpage fin ayant une dent, partie dentée ou analogue
DE102011110169B4 (de) * 2011-08-13 2022-10-13 Volkswagen Aktiengesellschaft Verfahren zur Herstellung eines Schaltrads für ein Schaltgetriebe
DE102011114504A1 (de) * 2011-09-29 2013-04-04 Sona Blw Präzisionsschmiede Gmbh Verfahren und Vorrichtung zur Herstellung eines Gangrads mit Kurzverzahnung
US9126258B2 (en) 2013-02-28 2015-09-08 Robert Rottinghaus Unitary connector pin formed by two-stage cold heading die
DE102013016048B3 (de) * 2013-09-27 2015-02-05 Sona Blw Präzisionsschmiede Gmbh Verfahren zur Herstellung eines Getriebeschaltrads durch Umformen
CN105387096A (zh) * 2015-12-18 2016-03-09 天津天海同步科技有限公司 一种同步器齿套及其倒锥齿形的优化方法
DE102018117368A1 (de) * 2017-07-21 2019-01-24 Jtekt Corporation Bearbeitungsgerät und bearbeitungsverfahren

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CH415247A (de) * 1963-04-24 1966-06-15 Bayerisches Leichtmetallwerk K Verfahren und Einrichtung zur Erzeugung von vorzugsweise mittigen Tragbildern an Zahnflanken konischer Zahnräder
DE2040413C3 (de) * 1969-08-15 1974-04-11 Toyota Jidosha Kogyo K.K., Toyota, Aichi (Japan) Verfahren zur Kaltherstellung des Keilzahnkranzes eines Schaltgetriebes für ein Kraftfahrzeug
US3688549A (en) * 1970-08-14 1972-09-05 Toyota Motor Co Ltd Process for cold plastic forming of spaced tooth-like projections on a ring or similarly shaped member
JPS4714696U (fr) * 1971-03-19 1972-10-20
JPS4911543A (fr) * 1972-06-01 1974-02-01
DD107219A1 (fr) * 1973-11-01 1974-07-20
DE3134857C2 (de) * 1981-09-03 1985-11-21 Bayerisches Leichtmetallwerk Graf Blücher von Wahlstatt GmbH & Co KG, 8000 München Verfahren zum Herstellen von Kupplungsteilen
JPS58120433A (ja) * 1982-01-12 1983-07-18 Nissan Motor Co Ltd クラツチギアの製造方法
SU1058699A1 (ru) * 1982-07-09 1983-12-07 Институт проблем надежности и долговечности машин АН БССР Инструмент дл упрочнени впадин зубчатых колес

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011111216A1 (de) 2011-08-20 2013-02-21 Sona Blw Präzisionsschmiede Gmbh Synchronring
EP2561938A1 (fr) 2011-08-20 2013-02-27 SONA BLW Präzisionsschmiede GmbH Méthode de fabrication d'une bague de synchronisation
DE102011088864A1 (de) 2011-12-16 2013-06-20 Cdp Bharat Forge Gmbh Kaltkalibrierpresse für Monoblockschalträder mit einbaufertiger Kupplungsverzahnung
EP3273084B1 (fr) 2016-07-22 2022-03-30 Diehl Metall Stiftung & Co. KG Bague de synchronisation

Also Published As

Publication number Publication date
DE3562319D1 (en) 1988-06-01
HUT43798A (en) 1987-12-28
EP0189447A1 (fr) 1986-08-06
ES545490A0 (es) 1986-12-16
CS259530B2 (en) 1988-10-14
DE3427156C2 (de) 1986-07-17
YU121085A (en) 1988-04-30
ZA855513B (en) 1986-03-26
DE3427156A1 (de) 1986-02-06
JPH035251B2 (fr) 1991-01-25
HU198139B (en) 1989-08-28
IL75883A (en) 1987-10-20
YU45265B (en) 1992-05-28
WO1986000838A1 (fr) 1986-02-13
IN164593B (fr) 1989-04-15
CA1249458A (fr) 1989-01-31
BR8506856A (pt) 1986-09-23
IL75883A0 (en) 1985-12-31
JPS61502736A (ja) 1986-11-27
US4700446A (en) 1987-10-20
ES8701549A1 (es) 1986-12-16

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