EP 3450045 A1 20190306 - METHOD AND APPARATUS FOR FORGING GEARS
Title (en)
METHOD AND APPARATUS FOR FORGING GEARS
Title (de)
VERFAHREN UND VORRICHTUNG ZUM SCHMIEDEN VON ZAHNRÄDERN
Title (fr)
PROCÉDÉ ET APPAREIL POUR FORGER DES ENGRENAGES
Publication
Application
Priority
- JP 2017163117 A 20170828
- JP 2018129968 A 20180709
Abstract (en)
A method for forging a gear according to the present disclosure includes pushing a material into a molding space of a teeth profile die from one side of the teeth profile die for molding external teeth by a punch, and after the pushing, discharging a gear having the external teeth formed thereon from another side of the teeth profile die by the punch. The method further includes providing a material outer diameter constraint die for constraining an outer diameter of a previous material before the material is pushed into the molding space of the teeth profile die on the one side of the teeth profile die, and setting an inner diameter size of the material outer diameter constraint die to be smaller than a large diameter size of the gear set in the teeth profile die.
IPC 8 full level
B21K 1/30 (2006.01); B21J 5/12 (2006.01); B23P 15/14 (2006.01)
CPC (source: CN EP US)
B21J 5/12 (2013.01 - EP US); B21K 1/30 (2013.01 - CN EP US); B21K 1/305 (2013.01 - EP US)
Citation (applicant)
JP 2014217876 A 20141120 - ONDO CORP
Citation (search report)
- [XY] EP 0322770 A2 19890705 - MH CENTER LTD [JP], et al
- [X] DE 3433515 A1 19850411 - HITACHI LTD [JP], et al
- [Y] JP S52115764 A 19770928 - TOYOTA MOTOR CO LTD
- [A] JP 2005161340 A 20050623 - KONDOO SEIKOO KK, et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3450045 A1 20190306; EP 3450045 B1 20200819; CN 109420733 A 20190305; CN 109420733 B 20200929; US 2019060980 A1 20190228
DOCDB simple family (application)
EP 18185340 A 20180724; CN 201810971894 A 20180824; US 201816111380 A 20180824