Title:
METHOD FOR MANUFACTURING PRESS-FORMED PRODUCT
Document Type and Number:
WIPO Patent Application WO/2024/070061
Kind Code:
A1
Abstract:
The present invention relates to a method for manufacturing a press-formed product 1 that is curved in top view and has at least a top plate part 3 and a vertical wall part 5 continuous from the top plate part 3, the method reducing an error from a target shape due to springback of the press-formed product 1 after being released from a die. The method comprises: a forming step for performing press-forming using a forming die provided with a first prospective angle that introduces a torsion (reverse torsion) due to springback in a reverse direction to a torsion (normal torsion) that would be caused by springback if the press-forming were performed in a single step without providing the die with the prospective angle; and a restriking step for press-forming a formed product 17 formed in the forming step, using a restrike die provided with a second prospective angle for reducing the reverse torsion.
Inventors:
TANAKA HIROYUKI (JP)
Application Number:
PCT/JP2023/020982
Publication Date:
April 04, 2024
Filing Date:
June 06, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/26; B21D24/00
Domestic Patent References:
| WO2020235152A1 | 2020-11-26 |
Foreign References:
| JP2016150354A | 2016-08-22 | |||
| JP2022087659A | 2022-06-13 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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