Global Patent Index - EP 3450045 A1

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

EP 3450045 A1 20190306 (EN)

Application

EP 18185340 A 20180724

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)

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