Invention Grant
- Patent Title: Press-working apparatus, press-working method, and press-molded product
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Application No.: US15564697Application Date: 2016-04-28
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Publication No.: US10857583B2Publication Date: 2020-12-08
- Inventor: Nobuo Yoshikawa , Yasuhiro Ito , Shigeru Yonemura , Tohru Yoshida
- Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL CORPORATION
- Current Assignee: NIPPON STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2015-091190 20150428; JP2016-088085 20160426
- International Application: PCT/JP2016/063341 WO 20160428
- International Announcement: WO2016/175281 WO 20161103
- Main IPC: B21D22/06
- IPC: B21D22/06 ; B21D24/00 ; B21D22/30 ; B21J5/08 ; B21D22/26 ; B21D22/02 ; B21J5/02

Abstract:
[Object] To enable flexible molding of a punch-nose in press working for obtaining a molded product including a U-shaped portion in a cross-section.[Solution] Provided is a press-working apparatus configured to provide a molded product by performing press working on a work, the molded product including, in a cross-section, a U-shaped portion including a bottom, a wall, and a punch-nose between the bottom and the wall, the press-working apparatus including: a die in which a recessed portion to receive the U-shaped portion is formed; a first punch that sandwiches a central area of the bottom with a bottom surface of the recessed portion; and a second punch that is pushed into the recessed portion later than the first punch, to restrain the wall between the second punch and a side surface of the recessed portion, and sandwich the work with the bottom surface to mold a peripheral area of the bottom and the punch-nose. A sandwiching width of the first punch that sandwiches the central area of the bottom and a setback amount of the second punch from the first punch in a push-in direction are set on the basis of a target sheet thickness of the punch-nose.
Public/Granted literature
- US20180104735A1 PRESS-WORKING APPARATUS, PRESS-WORKING METHOD, AND PRESS-MOLDED PRODUCT Public/Granted day:2018-04-19
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