Method for producing forged crankshaft

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10391546
APP PUB NO 20180071814A1
SERIAL NO

15554019

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Abstract

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A forged crankshaft production method includes a first preforming step, a second preforming step, and a final preforming step. In the first preforming step, sectional areas of portions to be formed into pins and sectional areas of portions to be formed into journals are decreased, whereby flat portions are formed, and the portion to be formed into the pin located at a second position is decentered. In the second preforming step, a portion to be formed into the pin located at a first position is decentered, and a portion to be formed into the pin located at a third position is decentered to a side opposite to the portion to be formed into the pin located at the first position. In a blank obtained thereby, portions to be formed into pins have been reduced and decentered, and the material yield rate can be improved.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL CORPORATIONCHIYODA-KU TOKYO 100-8071

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hori, Masao Matsubara, JP 55 316
Hwang, Samsoo Nishinomiya, JP 3 6
Nakano, Ryusuke Nishinomiya, JP 9 9
Okubo, Junichi Amagasaki, JP 29 34
Tamura, Kenji Takatsuki, JP 134 1171
Yoshida, Kunihiro Nishinomiya, JP 18 21

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