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Title:
PRESS-FORMING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/230367
Kind Code:
A1
Abstract:
A press-forming method according to the present invention is for press-formation into a target shape of a press-formed article 1 having a hat-shaped cross section and being curved along the longitudinal direction in a plan view. The press-forming method comprises: a first forming step for press-forming a preformed article 11 including a flange part 17 and a top plate part 13 having the same shape as the target shape and a vertical wall part 15 having the shape of a mountain protruding outward compared to the target shape; and a second forming step for press-forming the preformed article 11 into the press-formed article 1 having the target shape. The vertical wall part 15 in the first forming step includes a top-plate-part side surface section 15a, a flange side surface section 15b, and a bent section 15c, and the angle formed between the top-plate-part side surface section 15a and the horizontal plane is set to be smaller from the center toward an end part in the longitudinal direction.

Inventors:
KONDO OSAMU (JP)
ISHIWATARI AKINOBU (JP)
Application Number:
PCT/JP2020/001651
Publication Date:
November 19, 2020
Filing Date:
January 20, 2020
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D5/01; B21D22/26
Domestic Patent References:
WO2016171230A12016-10-27
Foreign References:
JP2017196646A2017-11-02
JP2010023078A2010-02-04
JP2006289480A2006-10-26
JP2017196646A2017-11-02
Other References:
See also references of EP 3970873A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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