Invention Grant
- Patent Title: Producing method, producing apparatus and producing equipment line of press formed product
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Application No.: US15511743Application Date: 2015-09-29
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Publication No.: US10596613B2Publication Date: 2020-03-24
- Inventor: Ryuichi Nishimura , Yoshiaki Nakazawa , Toru Yonebayashi , Koichi Sato
- 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: Clark & Brody
- Priority: JP2014-203319 20141001
- International Application: PCT/JP2015/004926 WO 20150929
- International Announcement: WO2016/051765 WO 20160407
- Main IPC: B21D22/26
- IPC: B21D22/26 ; B21D24/06 ; B21D22/10 ; B21D5/01 ; B21D24/00 ; B21D22/06 ; B21D47/01

Abstract:
A producing method of the press formed product includes a preparation step of preparing a metal sheet as a starting material; and a press working step of performing press working on the starting material. The press working step includes: during a time period from when pushing-in of the starting material into the die by the punch is started or immediately thereafter until the pushing-in of the punch with respect to the die reaches a predetermined distance short of a bottom dead point for the pushing-in, holding the pad at a position distant from the punch by the predetermined distance; when the pushing-in of the punch with respect to the die reaches the predetermined distance short of the bottom dead point, receiving the pad in the die; and continuing the pushing-in of the punch with respect to the die and the pad to the bottom dead point.
Public/Granted literature
- US20170291208A1 PRODUCING METHOD, PRODUCING APPARATUS AND PRODUCING EQUIPMENT LINE OF PRESS FORMED PRODUCT Public/Granted day:2017-10-12
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