Method for producing forged crankshaft

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11045865
APP PUB NO 20200360984A1
SERIAL NO

16640220

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Abstract

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Provided is a production method, including a first preforming process, a second preforming process, and a finish forging process. In the first preforming process, while a plurality of flat parts are formed, a region to be a second pin is decentered. The second preforming process includes: a process of pressing each region to be a plurality of journals in a pressing direction corresponding to a width direction of the flat part by using a pair of second dies; and a process of, after starting the pressing by the second dies, decentering a region to be a first pin and to be disposed in a first position and a region to be a third pin and to be disposed in a third position from each other in opposite directions with a width direction of the flat part being as a decentering direction by using third dies.

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Patent Owner(s)

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

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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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