Punching processing method, method of manufacturing press-formed product, and press-formed product

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United States of America Patent

PATENT NO 10315240
APP PUB NO 20180036785A1
SERIAL NO

15555593

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Abstract

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The punching processing method of the present invention is a punching processing method in which a metallic sheet material 1a is sequentially subjected to multiple punching processing steps by a punch and a die, comprising, in first step punching processing, forming a first step punched surface 2 on the sheet material 1a, and then in second step punching processing, forming a second step punched surface 3 on the sheet material 1a by punching the sheet material 1a such that the second step punched surface 3 and the first step punched surface 2 are crossed with each other, thereby forming matching portions 5 at positions where the first step punched surface 2 and the second step punched surface 3 intersect, wherein after the first step punching processing and before the second step punching process, the method further comprises subjecting the sheet material 1a to swaging processing that sandwiches and crushes matching portion forming portions 5a of the sheet material 1a, which will form the matching portions 5, from a top surface TS side and a back surface BS side of the sheet material 1a.

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Patent Owner(s)

  • JX NIPPON MINING & METALS CORPORATION

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Imamura, Hironori Ibaraki, JP 3 13
Masai, Kazutaka Ibaraki, JP 1 3

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