Invention Grant
- Patent Title: Press forming apparatus and press forming method
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Application No.: US14893786Application Date: 2014-06-27
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Publication No.: US10682681B2Publication Date: 2020-06-16
- Inventor: Ryuichi Nishimura , Kenichiro Otsuka , Keiji Ogawa , Yoshiaki Nakazawa
- 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: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@31f39589
- International Application: PCT/JP2014/067122 WO 20140627
- International Announcement: WO2015/002077 WO 20150108
- Main IPC: B21D22/22
- IPC: B21D22/22 ; B21D22/26 ; B21D24/04

Abstract:
A press forming apparatus includes: a punch; a blank holder disposed adjacent to the punch; a die being a counterpart of the punch; and a pad disposed to face the punch. The punch has a tip surface, an outside surface, and a stepped surface having shapes corresponding to a web portion, vertical wall portions, and a flange portion of a product, respectively. When the punch and the die are relatively moved in a pressing direction in a state where a middle portion in a width direction of a workpiece is sandwiched by the pad and punch and an outer peripheral portion in the width direction of the workpiece is bound by the blank holder and the die, the workpiece's outer peripheral portion in the width direction gets out from between the blank holder and the die, and the flange portion is shaped by the die and the punch's stepped surface.
Public/Granted literature
- US20160114379A1 PRESS FORMING APPARATUS AND PRESS FORMING METHOD Public/Granted day:2016-04-28
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