FORMATION DEVICE FOR MATERIAL FOR FINISH FORGING OF FORGED CRANKSHAFT

Title:

FORMATION DEVICE FOR MATERIAL FOR FINISH FORGING OF FORGED CRANKSHAFT

Document Type and Number:

WIPO Patent Application WO/2014/038183

Kind Code:

A1

Abstract:

A formation device moves a movable-journal mold (11U, 11B) toward a fixed-journal mold (10U, 10B) in the axial direction, and moves a pin mold (12) in the same axial direction and in an eccentric direction, from a state in which a rough journal section (J') of a rough material (4) is sandwiched and held between the fixed-journal mold (10U, 10B) and the movable-journal mold (11U, 11B), and the pin mold (12) is held against a rough pin part (P'). As a result, a rough crank arm part (A') is compressed in the axial direction and the thickness thereof is reduced to the thickness of the crank arm part of a forged crankshaft, and the rough pin part (P') is compressed in the eccentric direction and the amount of eccentricity thereof is increased to the amount of eccentricity of the pin part of the forged crankshaft. Consequently, it is possible to form a material for finish forging having a shape which generally matches the shape of the forged crankshaft.

Inventors:

OKUBO JUNICHI (JP)
TAMURA KENJI (JP)
YOSHIDA KUNIHIRO (JP)
FUKUYASU TOMIHIKO (JP)
TANIMOTO NOBUTAKA (JP)
MATSUI TADASHI (JP)

Application Number:

PCT/JP2013/005199

Publication Date:

March 13, 2014

Filing Date:

September 03, 2013

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

B21K1/08; B21J1/04

Domestic Patent References:

WO2012035663A1

2012-03-22

Foreign References:

JP2012161819A	2012-08-30
JP2003136181A	2003-05-14
JP2008155275A	2008-07-10
JP2011161496A	2011-08-25
JP2008155275A	2008-07-10
JP2011161496A	2011-08-25

Other References: