Invention Grant
US06860135B2 Method for removing strain from press-formed workpiece, and forming press
有权
从压制成型工件去除应变的方法和成型压力机
- Patent Title: Method for removing strain from press-formed workpiece, and forming press
- Patent Title (中): 从压制成型工件去除应变的方法和成型压力机
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Application No.: US10360970Application Date: 2003-02-06
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Publication No.: US06860135B2Publication Date: 2005-03-01
- Inventor: Naoki Yoshioka , Kenichi Kusunoki , Yuichi Yagami , Mikio Wada , Tsuyoshi Takahashi
- Applicant: Naoki Yoshioka , Kenichi Kusunoki , Yuichi Yagami , Mikio Wada , Tsuyoshi Takahashi
- Assignee: Araco Kabushiki Kaisha
- Current Assignee: Araco Kabushiki Kaisha
- Agency: Fish & Richardson P.C.
- Priority: JP2002-030394 20020207
- Main IPC: B21D1/06
- IPC: B21D1/06 ; B21D13/02 ; B21D22/02 ; B21D22/20 ; B21D22/26 ; B21D24/00 ; B21D24/02 ; B21D25/00 ; B21B22/22
Abstract:
In a forming press, a blank is pressed formed into a press-formed workpiece by means of an upper die and a lower die, while a peripheral edge portion of the blank is clamped by means of a die and a blank holder insert of the forming press. Subsequently, a central portion of the press-formed workpiece is partially held by means of the upper die and the lower die so as to draw a peripheral portion of the press-formed workpiece away from the central portion thereof, thereby removing strain from the press-formed workpiece.
Public/Granted literature
- US20030145643A1 Method for removing strain from press-formed workpiece, and forming press Public/Granted day:2003-08-07
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