Global Patent Index - EP 3281719 A4

EP 3281719 A4 20181219 - HOT FORGING DIE AND HOT FORGING METHOD

Title (en)

HOT FORGING DIE AND HOT FORGING METHOD

Title (de)

WARMSCHMIEDEGESENK UND WARMSCHMIEDEVERFAHREN

Title (fr)

MATRICE DE FORGEAGE À CHAUD ET PROCÉDÉ DE FORGEAGE À CHAUD

Publication

EP 3281719 A4 20181219 (EN)

Application

EP 16776474 A 20160331

Priority

  • JP 2015077337 A 20150406
  • JP 2016060732 W 20160331

Abstract (en)

[origin: EP3281719A1] Provided are a hot forging die and a hot forging method which enables to perform necking easily using a radial forging machine, even with difficult-to-work materials used for turbine blades. The hot forging die for hot-forging a rod-shaped forging material by radial forging includes a pair of halved pressing portions between which the forging material is interposed, each of the halved pressing portions having a convex portion having a substantially semicircular cross-section, the convex portion being continuous so as to surround the forging material, wherein each of the halved pressing portions includes a rough processing portion and a finishing portion having a convex portion having a larger curvature radius than the rough processing portion.

IPC 8 full level

B21J 13/02 (2006.01); B21J 1/04 (2006.01); B21J 5/00 (2006.01); B21J 7/14 (2006.01); B21J 9/06 (2006.01); B21K 3/04 (2006.01)

CPC (source: EP)

B21J 1/04 (2013.01); B21J 7/14 (2013.01); B21J 9/06 (2013.01); B21J 13/02 (2013.01); B21K 3/04 (2013.01)

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

DOCDB simple family (publication)

EP 3281719 A1 20180214; EP 3281719 A4 20181219; EP 3281719 B1 20200923; ES 2835953 T3 20210623; JP 6108258 B2 20170405; JP WO2016163307 A1 20170427; WO 2016163307 A1 20161013

DOCDB simple family (application)

EP 16776474 A 20160331; ES 16776474 T 20160331; JP 2016060732 W 20160331; JP 2016575697 A 20160331