Bent-forming method

Details Bent-forming method Bent-forming method

2007-05-08

2007-05-08

Tolan, Ed (Department: 3725)

Metal deforming

Process

Deforming sheet metal

C072S415000

Reexamination Certificate

active

11138495

ABSTRACT:
In a first forming step, a metal sheet placed on, and held by a provisional horizontal flat forming portion of a first forming die part is bent along a provisional bend forming portion of the first forming die part to execute bent-forming such that two arch parts of the metal sheet, having respective protuberances oriented in directions opposite from each other, with protuberance surfaces being butted against a provisional inclined flat forming portion of a second forming die part, and a provisional inclined flat forming portion of the first forming die part, respectively, are coupled with each other, thereby obtaining a provisional formed member comprising a provisional inclined flat portion without any warpage, formed continuously from a provisional horizontal flat portion via a provisional bend, and a flange portion formed continuously from the provisional inclined flat portion so as to form a target angle. Subsequently, in a second forming step, the provisional formed member is formed into a target shape by causing the provisional bend to undergo deformation by bending back while bent-forming the provisional horizontal flat portion.

REFERENCES:
patent: 4373371 (1983-02-01), Liu
patent: 6748788 (2004-06-01), Yamano et al.
patent: 2003/0061852 (2003-04-01), Yamano et al.
Patent Abstracts of Japan, JP 04-147718, May 21, 1992.

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