DEVICE FOR FORMING FINISH-FORGING ELEMENT FOR FORGED CRANKSHAFT FOR 3-CYLINDER ENGINE AND METHOD FOR PRODUCING FORGED CRANKSHAFT FOR 3-CYLINDER ENGINE USING SAME

Title:

DEVICE FOR FORMING FINISH-FORGING ELEMENT FOR FORGED CRANKSHAFT FOR 3-CYLINDER ENGINE AND METHOD FOR PRODUCING FORGED CRANKSHAFT FOR 3-CYLINDER ENGINE USING SAME

Document Type and Number:

WIPO Patent Application WO/2014/091730

Kind Code:

A1

Abstract:

This forming device causes a rough journal section (Ja) of a rough element (4) to be held sandwiched by a journal mold (10U, 10B), moves the journal mold (10U, 10B) and a mobile pin mold (12) in the axial direction towards a reference pin mold (11) from the state of the reference pin mold (11) and the mobile pin mold (12) being applied to a rough pin section (Pa), and moves the reference pin mold (11) and mobile pin mold (12) in a direction perpendicular to the axial direction. As a result, a rough crank arm section (Aa) is compressed in the axial direction, reducing the thickness thereof to the thickness of the crank arm section of a forged crankshaft, the rough pin section (Pa) is pressed in a direction perpendicular to the axial direction, increasing the amount of eccentricity thereof to the amount of eccentricity of the pin section of the forged crankshaft, and as a result, it is possible to form a finish-forging element having a shape approximately matching that of a forged crankshaft for a 3-cylinder engine.

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Inventors:

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

Application Number:

PCT/JP2013/007188

Publication Date:

June 19, 2014

Filing Date:

December 06, 2013

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

B21K1/08; F16C3/08

Foreign References:

JP2012170974A	2012-09-10
JPS6117251U	1986-01-31
GB700956A	1953-12-16
JP2008155275A	2008-07-10
JP2011161496A	2011-08-25

Other References: