Method for producing forged crankshaft

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United States of America Patent

PATENT NO 11045864
APP PUB NO 20200114414A1
SERIAL NO

16061398

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Abstract

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Disclosed is a method for producing a forged crankshaft. This production method includes: a pressing step of pressing a part in a longitudinal direction (first region) of a bar-like member with a pair of first dies, thereby decreasing a cross sectional area of the first region; and a decentering step of decentering a second region of the bar-like member with a second die with the first region being held. The second region is at least a part of the region of the bar-like member excepting the first region. The decentering direction by the second die is a direction perpendicular to each of the pressing direction by the first dies and the longitudinal direction of the bar-like member.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL CORPORATION6-1 MARUNOUCHI 2-CHOME CHIYODA-KU TOKYO 100-8071

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Okubo, Junichi Tokyo, JP 29 34
Tamura, Kenji Tokyo, JP 134 1171

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