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Patent Searching and Data


Title:
PRESS-MOLDING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/039686
Kind Code:
A1
Abstract:
The press-molding method according to the present invention is for molding a press-molded article 1 being curved so as to be recessed or so as to project in the height direction and having a top plate part 3, a vertical wall part 5 contiguous to the top plate part 3, and a flange part 7 contiguous to the vertical wall part 5, the method comprising: a first molding step for molding the top plate part 3 having the same shape as the target shape of the press-molded article 1, and molding the vertical wall part 5 and the flange part 7 so as to set the height of the vertical wall higher than the target shape; and a second molding step for remolding a flange-side ridge part 11 between the vertical wall part 5 and the flange part 7 so that the vertical wall part 5 molded in the first molding step will have the same vertical wall height as the target shape. The vertical wall height of the vertical wall part 5 molded in the first molding step is made to be greater than the target shape by having added a value not more than 1/2 of the curvature radius of the flange-side ridge part 11 as viewed in a longitudinal vertical cross-section of the target shape.

Inventors:
URABE MASAKI (JP)
Application Number:
PCT/JP2019/022101
Publication Date:
February 27, 2020
Filing Date:
June 04, 2019
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D19/00; B21D22/26
Domestic Patent References:
WO2011148880A12011-12-01
Foreign References:
JP2015027698A2015-02-12
JP5382281B12014-01-08
JP2015131306A2015-07-23
Other References:
See also references of EP 3842164A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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