EP 0250312 A1 19871223 - Method of making pinions of which the tooth-driving surfaces form a sharp-edged angle.
Title (en)
Method of making pinions of which the tooth-driving surfaces form a sharp-edged angle.
Title (de)
Verfahren zur Herstellung von Zahnrädern, deren Zahneingriffsflächen einen scharfkantigen Winkel bilden.
Title (fr)
Procédé pour la réalisation de pignons dont le bord d'attaque des dents forme un angle à arête vive.
Publication
Application
Priority
FR 8608788 A 19860618
Abstract (en)
Method of making a pinion blank in which the teeth of this blank are subjected to a first forging operation, the purpose of which is to form, on this driving surface (3), a first face inclined with respect to the axis X-X of the tooth, this first face intersecting the median plane of the tooth to be obtained, the teeth are subjected to a second forging operation, the purpose of which is to form, on this driving surface, a second face inclined with respect to the axis and opposite with respect to the first face, this second face intersecting the median plane of the tooth to be obtained and finally the teeth are subjected to a third forging operation acting simultaneously on the first and second faces thus formed. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
B21K 1/30 (2013.01)
Citation (search report)
- [X] WO 8600838 A1 19860213 - BLUECHER WAHLSTATT LEICHTMET [DE]
- [A] FR 2557946 A1 19850712 - RENAULT [FR]
- [A] US 3688549 A 19720905 - OHNISHI TOSHIMI, et al
- [A] FR 2249721 A1 19750530 - FAHRZEUGGETRIEBEWERKE W FRIEDE [DD]
- [A] FR 2183774 A1 19731221 - OPTI HOLDING AG [CH]
- [A] PATENT ABSTRACTS OF JAPAN, vol. 7, no. 106 (M-213)[1251], 10 mai 1983; & JP-A-58 29 540 (TOYOTA JIDOSHA KOGYO K.K.) 21-02-1983
Designated contracting state (EPC)
CH DE ES FR GB IT LI
DOCDB simple family (publication)
EP 0250312 A1 19871223; EP 0250312 B1 19920603; DE 3779495 D1 19920709; DE 3779495 T2 19930429; ES 2031917 T3 19930101; FR 2600274 A1 19871224; FR 2600274 B1 19900309; JP 2554334 B2 19961113; JP S6357117 A 19880311
DOCDB simple family (application)
EP 87401345 A 19870612; DE 3779495 T 19870612; ES 87401345 T 19870612; FR 8608788 A 19860618; JP 14930387 A 19870617