Title:
METHOD FOR DESIGNING MOLD SHAPE AND METHOD FOR PRODUCING PRESSED PART
Document Type and Number:
WIPO Patent Application WO/2020/008840
Kind Code:
A1
Abstract:
The present invention addresses the problem of making it possible to determine, by a simple means, a preformed shape with which it is possible to suppress the occurrence of cracks and wrinkles in a metal plate. A metal plate (1) is press-molded into a component (5) having a three-dimensional shape. The method comprises: a first step (2) for press-molding the metal plate (1) into an intermediate part of a preformed shape (3), which is composed of a shape in which the component (5) having a three-dimensional shape is crushed under load conditions such that a load is applied in a direction in which at least a portion of the component (5) having a three-dimensional shape is flat; and a second step (4) for press-molding the intermediate part into the component (5) having a three-dimensional shape.
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Inventors:
FUJII YUSUKE (JP)
YAMASAKI YUJI (JP)
YAMASAKI YUJI (JP)
Application Number:
PCT/JP2019/023719
Publication Date:
January 09, 2020
Filing Date:
June 14, 2019
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/00; B21D22/26
Domestic Patent References:
| WO2017175730A1 | 2017-10-12 | |||
| WO2017010470A1 | 2017-01-19 |
Foreign References:
| JP2002001445A | 2002-01-08 | |||
| JP2016150354A | 2016-08-22 | |||
| JP2010115674A | 2010-05-27 | |||
| JP5867657B2 | 2016-02-24 | |||
| JPH086986B2 | 1996-01-29 | |||
| JP2018126982A | 2018-08-16 |
Other References:
See also references of EP 3819037A4
Attorney, Agent or Firm:
TANAKA Hidetetsu et al. (JP)
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