EP0250312B1 - Procédé pour la réalisation de pignons dont le bord d'attaque des dents forme un angle à arête vive - Google Patents

Procédé pour la réalisation de pignons dont le bord d'attaque des dents forme un angle à arête vive Download PDF

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Publication number
EP0250312B1
EP0250312B1 EP19870401345 EP87401345A EP0250312B1 EP 0250312 B1 EP0250312 B1 EP 0250312B1 EP 19870401345 EP19870401345 EP 19870401345 EP 87401345 A EP87401345 A EP 87401345A EP 0250312 B1 EP0250312 B1 EP 0250312B1
Authority
EP
European Patent Office
Prior art keywords
teeth
tooth
face
tooth arrangement
leading edge
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
EP19870401345
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0250312A1 (fr
Inventor
Michel Jean Garconnet
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.)
Garconnet Michel
Regie Nationale des Usines Renault
Original Assignee
Garconnet Michel
Regie Nationale des Usines Renault
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 Garconnet Michel, Regie Nationale des Usines Renault filed Critical Garconnet Michel
Publication of EP0250312A1 publication Critical patent/EP0250312A1/fr
Application granted granted Critical
Publication of EP0250312B1 publication Critical patent/EP0250312B1/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
    • 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

Definitions

  • the invention relates to a method for producing a dog clutch teeth in the form of a crown, the leading edge of which forms a sharp edge angle according to the preamble of claim 1.
  • Toothings of this type are, for example, used in the construction of gearboxes, the leading edge being constituted by the edge of the teeth which is directed towards, and which meshes with, another toothing. These two teeth are relatively movable and it is therefore important to form on the leading edge of the teeth considered a sharp edge angle allowing these two teeth to engage with each other during their relative movement.
  • the publication WO-A-86-00838 describes a method of cold forging a dog clutch teeth previously mounted on a support.
  • a semi-finished product is forged on its final cylindrical support before starting the forging and calibration process of the teeth.
  • the object of the invention is to facilitate the preparation of the calibration toothing before it is mounted on the pinion.
  • the third stamping operation is followed by a fourth stamping operation involving the flanks of the teeth delimiting the inter-tooth zones in order to form flanks of the bodies oriented opposite the vertices at an angle. lively leading edges.
  • the pinion is produced by a cutting operation, the leading edge at a sharp angle being produced on the face of the pinion opposite to the leading face during the cutting operation.
  • the present invention therefore has for purpose the realization by stamping of a dog clutch teeth whose leading edge of the teeth forms an angle with a sharp edge.
  • This dog clutch teeth 1 thus comprises teeth 2, the leading edge 3 of which is oriented towards a lateral face of the dog clutch teeth, this leading edge being delimited (see FIG. 6) by two plane faces 4 and 5 inclined by relative to the axis XX of the tooth and forming between them a sharp edge 6.
  • the axis XX passing through the apex 6 of the tooth is, in this example, located in its median plane and the two faces 4 and 5 of identical inclination, are symmetrical with respect to each other and form an angle "C".
  • the first operation for making this interconnection toothing consists in cutting a blank (not shown) in a metal plate, this blank having at its periphery blanks of teeth of generally parallelepiped shape.
  • the metal plate has a rounded 7 on the leading edges of the cutting punch and the leading edge 3 of the teeth will be formed on the opposite face of the blank.
  • the metal plate undergoes a rectification operation of the two faces 8 and 9 in order to form perfectly flat faces and of desired spacing, so that this blank thus rectified can favorably undergo the subsequent stamping operations .
  • the first stamping operation consists (see FIG. 3) of forming a first inclined flat face 10 on the tooth blank, this stamping being such that this flat face 10 intersects, by its upper part, the axis XX of the teeth including their midplane.
  • the teeth of the clutch teeth then undergo a second stamping operation illustrated in FIG. 4, according to which a second face 11 is inclined relative to the axis XX of the teeth, this face 11 being intersecting with this axis XX so that the summit 12 demarcated by the two faces 10 and 11, is located on the side of the face 10.
  • the face 10 is slightly displaced and deformed and takes a concave shape as shown at 101 in FIG. 4. This results from the operation of pushing back the metal located at 13, this metal being pushed, on the one hand, towards this face 10, on the other hand, towards the inside of the tooth to fill perfectly the hollowed out parts of the matrix used.
  • the dog clutch teeth then undergoes a third forging operation illustrated in FIG. 5, this third operation simultaneously involving the two faces 101 and 11 in order to form the two flat faces 4 and 5 of the leading edge 3 of the tooth and in order to refocus the edge 12 which becomes the edge 6 located in the median plane of the tooth containing the axis XX.
  • This edge 6 is at a sharp angle and this due to the successive preliminary operations illustrated in Figures 3 and 4 without which such a sharp edge could not be obtained.
  • the dog clutch teeth thus obtained provided with the desired leading edge may possibly undergo an additional stamping operation, illustrated in FIG. 6, having the effect of forming draft angles D on the lateral faces 14 and 15 located opposite l 'one of the other teeth, and delimiting between them the inter-tooth areas.
  • these clearance angles D will be intended to compensate for any defects in the parallelism of the teeth of the pinions meshing with one another, taking account for example of the required clearances.
  • each matrix has adapted male parts, delimiting the inter-tooth areas of the pinion and intended to hold the metal constituting these teeth during successive die-forging operations.
  • the male parts of the dies delimiting the inter-tooth areas of the interconnection teeth are of reduced width from one operation to the next operation, in order to allow the introduction of the part into the matrix considered.
  • leading edge 3 is located perpendicular to a lateral face of the dog clutch teeth.
  • any other inclination may be adopted depending on the type of gear to be produced, the edge of this leading edge also being able to be parallel to the axis of the dog clutch teeth.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)
  • Gear Processing (AREA)
  • Forging (AREA)
  • Mechanical Operated Clutches (AREA)
  • Punching Or Piercing (AREA)
EP19870401345 1986-06-18 1987-06-12 Procédé pour la réalisation de pignons dont le bord d'attaque des dents forme un angle à arête vive Expired - Lifetime EP0250312B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8608788A FR2600274B1 (fr) 1986-06-18 1986-06-18 Procede pour la realisation de pignons dont le bord d'attaque des dents forme un angle a arete vive
FR8608788 1986-06-18

Publications (2)

Publication Number Publication Date
EP0250312A1 EP0250312A1 (fr) 1987-12-23
EP0250312B1 true EP0250312B1 (fr) 1992-06-03

Family

ID=9336447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870401345 Expired - Lifetime EP0250312B1 (fr) 1986-06-18 1987-06-12 Procédé pour la réalisation de pignons dont le bord d'attaque des dents forme un angle à arête vive

Country Status (5)

Country Link
EP (1) EP0250312B1 (ja)
JP (1) JP2554334B2 (ja)
DE (1) DE3779495T2 (ja)
ES (1) ES2031917T3 (ja)
FR (1) FR2600274B1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH690565A5 (de) * 1995-04-10 2000-10-31 Feinstanz Ag Verfahren zur Herstellung von Getriebebauteilen mit Zähnen mit Dachform und Hinterschnitt.
DE10021588B4 (de) * 2000-05-04 2009-04-09 Schaeffler Kg Kupplungsverzahnung eines Elementes einer Synchronisiereinheit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE2222080A1 (de) * 1972-05-05 1973-11-22 Opti Holding Ag Verfahren und gesenk zur herstellung der verzahnung von zahnkraenzen, insbesondere von kupplungskoerpern fuer synchrongetriebe
DD107219A1 (ja) * 1973-11-01 1974-07-20
JPS5829510A (ja) * 1981-08-12 1983-02-21 Kobe Steel Ltd 厚板の平面形状制御方法
JPS6049826A (ja) * 1983-08-29 1985-03-19 Nissan Motor Co Ltd 自動車のトランスミッション用ギアの成形方法
FR2557946B1 (fr) * 1984-01-06 1989-04-21 Renault Pignon a crabot de synchronisation avec antilacher
DE3427156C2 (de) * 1984-07-24 1986-07-17 Bayerisches Leichtmetallwerk Graf Blücher von Wahlstatt GmbH & Co KG, 8000 München Verfahren zum Herstellen eines Synchronteils mit hinterschnittenen Zähnen

Also Published As

Publication number Publication date
ES2031917T3 (es) 1993-01-01
FR2600274B1 (fr) 1990-03-09
JP2554334B2 (ja) 1996-11-13
JPS6357117A (ja) 1988-03-11
FR2600274A1 (fr) 1987-12-24
EP0250312A1 (fr) 1987-12-23
DE3779495D1 (de) 1992-07-09
DE3779495T2 (de) 1993-04-29

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