Title:
PRESS-FORMING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/137630
Kind Code:
A1
Abstract:
A press-forming method according to the present invention, which suppresses warping of a vertical wall portion due to springback in a press-formed article 1 having a top plate portion 3, vertical wall portions 5, and a flange portions 7, includes: a first forming step for press-forming an intermediate formed article 31 having flange portions 35, which are curved in a convex shape in a height direction more than a target shape of the press-formed article 1, and are thereby provided with a height difference; and a second forming step for press-forming the intermediate formed article 31 into a press-formed article 1 having the target shape, so as to minimize the height difference of the flange portions 35 of the intermediate formed article 31.
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Inventors:
FUJII YUSUKE (JP)
Application Number:
PCT/JP2021/029184
Publication Date:
June 30, 2022
Filing Date:
August 05, 2021
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/20; B21D22/26
Domestic Patent References:
WO2016051765A1 | 2016-04-07 |
Foreign References:
JP2020185591A | 2020-11-19 | |||
JP2011206789A | 2011-10-20 | |||
JP2017042791A | 2017-03-02 | |||
JP2006281312A | 2006-10-19 | |||
JPH02927B2 | 1990-01-09 | |||
JPS606223A | 1985-01-12 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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