DEVICE FOR FORMING FINISH-FORGING BLANK FOR FORGED CRANKSHAFT OF INLINE-SIX ENGINE, AND METHOD FOR MANUFACTURING FORGED CRANKSHAFT OF INLINE-SIX ENGINE USING SAID DEVICE

Title:

DEVICE FOR FORMING FINISH-FORGING BLANK FOR FORGED CRANKSHAFT OF INLINE-SIX ENGINE, AND METHOD FOR MANUFACTURING FORGED CRANKSHAFT OF INLINE-SIX ENGINE USING SAID DEVICE

Document Type and Number:

WIPO Patent Application WO/2015/129217

Kind Code:

A1

Abstract:

　A forming device wherein: a movable journal mold (10U, 10B) and a movable pin mold (12) are caused to move in an axial direction toward a fixed journal mold (9U, 9B) from a state in which the raw journal section (Ja) of a raw material (4) is held between the movable journal mold (10U, 10B) and the fixed journal mold (9U, 9B), and in which the movable pin mold (12) is applied to a raw pin part (Pa); and the movable pin mold (12) is caused to move in the axial direction and an orthogonal direction. A raw arm section (Aa) is thereby compressed from either side in the axial direction, the thickness thereof being reduced to the thickness of the arm section of the forged crankshaft. Pressure is applied to the raw pin part (Pa) in the axial direction and the orthogonal direction, the amount of eccentricity thereof being raised to the degree of eccentricity of the pin part of the forged crankshaft.

Inventors:

OKUBO JUNICHI (JP)
TAMURA KENJI (JP)
YOSHIDA KUNIHIRO (JP)

Application Number:

PCT/JP2015/000807

Publication Date:

September 03, 2015

Filing Date:

February 20, 2015

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

B21K1/08; B21J5/08; F16C3/08

Domestic Patent References:

WO2012035663A1

2012-03-22

Foreign References:

JPH08121539A	1996-05-14
JP2012161819A	2012-08-30

Other References: