Title:
BENDING MEMBER OF ALUMINUM OR ALUMINUM ALLOY, BENDING METHOD, AND BENDING DIE
Document Type and Number:
Japanese Patent JP3387739
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To restrict wrinkles from generating at the time of bending of shape of aluminum or aluminum alloy.
SOLUTION: At the time of bending a shape having corner parts, a bending die is used whose part in contact with the compression side corner part of the shapes 1 (square tube) is formed in the smaller radius than the corner radius and at the same time of bending, the corner radius of bending compression side of the shapes 1 is formed smaller than before bending. At the time of bending, the force causing a deformation toward the bending compression side is exerted, and by this force the mass of the corner part of the shapes 1 is moved toward the corner of a compression side roller 2, and the corner part of the shapes 1 after bending is finished by a prescribed radius corresponding to the corner radius of the compression side roller 2.
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Inventors:
Kazuhiro Kaida
Takashi Oka
Takashi Oka
Application Number:
JP17577396A
Publication Date:
March 17, 2003
Filing Date:
June 14, 1996
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
B60R19/03; B21D7/024; B21D7/08; B21D53/86; B21D53/88; (IPC1-7): B21D7/08; B21D7/024; B21D53/88; B60R19/03
Domestic Patent References:
| JP8187519A | ||||
| JP5131238A | ||||
| JP576943A | ||||
| JP751738A | ||||
| JP54117369A |
Attorney, Agent or Firm:
Kaoru Komoto