Invention Application
- Patent Title: METHOD OF PRESS FORMING AND PRESS FORMING APPARATUS
- Patent Title (中): 压制成型和压制成型装置的方法
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Application No.: US14896229Application Date: 2014-04-14
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Publication No.: US20160121384A1Publication Date: 2016-05-05
- Inventor: Satoshi SUMIKAWA , Akinobu ISHIWATARI , Jiro HIRAMOTO
- Applicant: JFE STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: JFE STEEL CORPORATION
- Current Assignee: JFE STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Priority: JP2013-134446 20130627; JP2014-015730 20140130
- International Application: PCT/JP2014/060624 WO 20140414
- Main IPC: B21D22/02
- IPC: B21D22/02

Abstract:
A method of press forming includes: forming a trench-shaped portion into a product shape with a die and a punch until reaching a first bottom dead center, and forms at least one of: a flange portion subject to shrink flange deformation such that a linear length of the flange portion subject to the shrink flange deformation in a longitudinal direction is shorter than a linear length of a flange portion in the product shape; and a flange portion subject to stretch flange deformation such that a linear length of the flange portion subject to the stretch flange deformation in the longitudinal direction is longer than the linear length of the flange portion in the product shape; and forming the formed flange portion into the product shape with the die and a flange forming die until reaching a second bottom dead center.
Public/Granted literature
- US10286436B2 Method of press forming and press forming apparatus Public/Granted day:2019-05-14
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