Method for producing forged crankshaft

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11253910
APP PUB NO 20210187591A1
SERIAL NO

16640131

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Provided is a production method, including a first preforming process for obtaining a first preform from a billet, a second preforming process for obtaining a final preform from the first preform, and a finish forging process for forming the final preform into a finishing dimension of a forged crankshaft. In the first preforming process, a plurality of flat parts are formed by pressing pin-corresponding parts and journal-corresponding parts in a direction perpendicular to an axial direction of the billet. The second preforming process includes: a process of pressing regions to be a plurality of journals with a width direction of the flat part as a pressing direction by using a pair of first dies; and a process of, after starting pressing by the first dies, decentering regions to be a plurality of pins with the width direction of the flat part as a decentering direction by using second dies.

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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 Tokyo, JP 55 316
Hwang, Sam Soo Tokyo, JP 13 10
Nakano, Ryusuke Tokyo, JP 9 9
Okubo, Junichi Tokyo, JP 29 34
Ota, Yukihiro Tokyo, JP 2 0
Tamura, Kenji Tokyo, JP 134 1171
Yoshida, Kunihiro Tokyo, JP 18 21

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