Title:
プレス加工品の歪み除去方法
Document Type and Number:
Japanese Patent JP4166019
Kind Code:
B2
Abstract:
In a forming press (100), a blank is pressed formed into a press-formed workpiece by means of an upper die (21) and a lower die (11), 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 (21) and the lower die (11) 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.
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Inventors:
Naoki Yoshioka
Kenichi Kusunoki
Yuichi Yagami
Mikio Wada
Tsuyoshi Takahashi
Kenichi Kusunoki
Yuichi Yagami
Mikio Wada
Tsuyoshi Takahashi
Application Number:
JP2002030394A
Publication Date:
October 15, 2008
Filing Date:
February 07, 2002
Export Citation:
Assignee:
Toyota Auto Body Co., Ltd.
TOYOTA JIDOSHA KABUSHIKI KAISHA
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
B21D1/06; B21D22/26; B21D13/02; B21D22/02; B21D22/20; B21D24/00; B21D24/02; B21D25/00; B21D31/00
Domestic Patent References:
| JP2001259752A | ||||
| JP3101309U | ||||
| JP9122753A | ||||
| JP4108919U | ||||
| JP11179440A | ||||
| JP5319317B2 |
Attorney, Agent or Firm:
Patent business corporation Prospec patent office