EP2525926B1 - Procédé de fabrication d'une partie de transmission à symétrie de révolution - Google Patents

Procédé de fabrication d'une partie de transmission à symétrie de révolution Download PDF

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Publication number
EP2525926B1
EP2525926B1 EP10740687.8A EP10740687A EP2525926B1 EP 2525926 B1 EP2525926 B1 EP 2525926B1 EP 10740687 A EP10740687 A EP 10740687A EP 2525926 B1 EP2525926 B1 EP 2525926B1
Authority
EP
European Patent Office
Prior art keywords
flange
produced
blank
rotationally symmetrical
spinning
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.)
Not-in-force
Application number
EP10740687.8A
Other languages
German (de)
English (en)
Other versions
EP2525926A1 (fr
Inventor
Udo Friese
Heiko Ohlscher
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.)
WF Maschinenbau und Blechformtecknik GmbH and Co KG
Original Assignee
WF Maschinenbau und Blechformtecknik GmbH and Co 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=43797529&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2525926(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by WF Maschinenbau und Blechformtecknik GmbH and Co KG filed Critical WF Maschinenbau und Blechformtecknik GmbH and Co KG
Publication of EP2525926A1 publication Critical patent/EP2525926A1/fr
Application granted granted Critical
Publication of EP2525926B1 publication Critical patent/EP2525926B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/28—Making other particular articles wheels or the like gear wheels

Definitions

  • the invention relates to a method for producing a rotationally symmetrical gear part according to the preamble of claim 1.
  • Gear parts produced in this way are used in various fields of application, for example as starter rings in motor vehicles.
  • the starter rings used so far are either made in one piece from a round blank or by welding the separately manufactured sprocket also on the separate flange.
  • the Ronde is deformed by material thickening on the outer edge by means of one or more spinning roller, with a simultaneous change in thickness of the blank.
  • the outer side shell part When using said round blank, the outer side shell part must be produced by an edge thickening, for which purpose material is pressed out of the blank into the outer edge region by means of cold forming in the spinning process.
  • the invention has for its object to further develop a method of the generic type so that a simpler and more cost-effective production with improved product quality is possible.
  • the annular blank which forms the semifinished product can consist of a welded flat iron, a pipe section, a forged or ring-rolled intermediate product whose wall thickness substantially corresponds to the thickness of the casing part of the finished gear part, into which Production of a starter ring, an external toothing is introduced.
  • the flange to be formed according to the invention adjoins the jacket part and is preferably pressed or deformed radially inwards by pressing with at least one spinning roller, starting from the thickness of the jacket part, with wall thinning.
  • the formation of the flange can be carried out in several steps, e.g. first by molding a frusto-conical contour on the ring-shaped blank by means of a pressing tool, and then pressing / forming in the direction of the central axis of the gear member by means of the spinning roller, with simultaneous dilution of the Flanschwandung.
  • different wall thicknesses can be formed over the contour of the flange, which run continuously in the sense of a wedge or stepped. It is also conceivable to form a hub in the center of the flange by pressing / forming. Furthermore, in particular with a very complex flange contour, the final contour can be produced by a pressing tool.
  • different wall thicknesses of the flange can also be produced with the help of the pressure roller, depending on the delivery of the pressure roller both in the axial and in the radial direction of the transmission part, so that different thicknesses and contours of the flange can be produced without difficulty.
  • FIG. 1 is an annular blank 1 recognizable, which is to a rotationally symmetrical gear part 2, in particular a starter ring, deformed, as in the FIG. 4 as a finished product is shown schematically.
  • This blank 1 is in a tool chuck 7 ( FIG. 2 ) of a device for carrying out the method with a section which in the finished product ( FIG. 4 ) forms a shell part 3, held, while another part projects beyond the tool chuck 7, from which then a radially extending flange 4 is formed.
  • a pre-deformation of the gear part 2 by means of a pressing tool 5, with which the protruding from the tool chuck 7 part of the blank 1 is first deformed into a cone, as shown in the FIG. 2 is recognizable.
  • the pressing tool 5 is pressed axially against the cylindrical, projecting portion of the blank 1.
  • the flange 4 is formed by means of a radially and axially deliverable spinning roller 6, which extends radially to the central axis, at right angles to the shell part.
  • the outside of the casing part 3 can be provided with, for example, an external toothing.
  • the precursor present as a semifinished product corresponding to FIG. 2 set in rotation while the freely rotating pressure roller 6 is delivered radially and axially.
  • a concentric, axially oriented hub can also be molded onto the flange 4, likewise by pressing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)

Claims (5)

  1. Procédé de fabrication d'une pièce de transmission en une seule pièce présentant une symétrie de rotation, en particulier d'une couronne de volant comprenant une pièce enveloppe (3) situé côté extérieur à laquelle se raccorde une bride coudée (4) orientée vers l'axe médian, ayant une épaisseur différente,
    caractérisé en ce que
    la bride (4) est fabriquée par déformation d'une section périphérique d'une ébauche annulaire (1) et par diminution de ses parois sous pression, selon lequel, avant de comprimer la bride (4) on réalise une préforme conique de l'ébauche annulaire (1) à l'aide d'un outil de compression (5).
  2. Procédé conforme à la revendication 1,
    caractérisé en ce qu'
    au moyen d'au moins un rouleau presseur (6) on obtient des épaisseurs et/ou des contours différents de la bride (4).
  3. Procédé conforme à la revendication 1 ou 2,
    caractérisé en ce que
    l'on forme un moyeu concentrique sur la bride (4) par déformation à froid.
  4. Procédé conforme à l'une des revendications précédentes,
    caractérisé en ce que
    l'on obtient le contour final de la bride au moyen d'un outil presseur.
  5. Procédé conforme à l'une des revendications précédentes,
    caractérisé en ce que
    l'ébauche annulaire (1) est calibrée avant la déformation.
EP10740687.8A 2010-01-18 2010-08-11 Procédé de fabrication d'une partie de transmission à symétrie de révolution Not-in-force EP2525926B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010004932 DE102010004932A1 (de) 2010-01-18 2010-01-18 Verfahren zur Herstellung eines rotationssymmetrischen Getriebeteiles sowie Getriebeteil
PCT/EP2010/061692 WO2011085829A1 (fr) 2010-01-18 2010-08-11 Procédé de fabrication d'une partie de transmission à symétrie de révolution et partie de transmission

Publications (2)

Publication Number Publication Date
EP2525926A1 EP2525926A1 (fr) 2012-11-28
EP2525926B1 true EP2525926B1 (fr) 2013-12-11

Family

ID=43797529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10740687.8A Not-in-force EP2525926B1 (fr) 2010-01-18 2010-08-11 Procédé de fabrication d'une partie de transmission à symétrie de révolution

Country Status (4)

Country Link
EP (1) EP2525926B1 (fr)
DE (1) DE102010004932A1 (fr)
ES (1) ES2451520T3 (fr)
WO (1) WO2011085829A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2983033A (en) 1960-01-04 1961-05-09 Darwin S Cox Method of manufacturing dished disks and the like
DE19511963C2 (de) * 1995-03-31 2000-12-07 Leifeld Gmbh & Co Verfahren zur Herstellung von rotationssymmetrischen metallischen Werkstücken
DE19620812B4 (de) * 1996-05-23 2005-07-28 Leifeld Metal Spinning Gmbh Verfahren zum Herstellen eines rotationssymmetrischen Körpers
DE502004005869D1 (de) 2003-11-17 2008-02-14 Wf Maschinenbau Blechformtech Verfahren zur herstellung eines flansches an einer blechronde
JP2009195916A (ja) * 2008-02-19 2009-09-03 Nippon Spindle Mfg Co Ltd 内歯車部材の成形方法及び成形装置

Also Published As

Publication number Publication date
ES2451520T3 (es) 2014-03-27
EP2525926A1 (fr) 2012-11-28
DE102010004932A1 (de) 2011-07-21
WO2011085829A1 (fr) 2011-07-21

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