Title:
METHOD FOR PREDICTING CHANGE IN SHAPE OF PRESS-FORMED PART
Document Type and Number:
WIPO Patent Application WO/2021/161578
Kind Code:
A1
Abstract:
This method for predicting a change in the shape of a press-formed part predicts a change, with the elapse of a unit amount of time, in the shape of a press-formed part 1 that has undergone springback after release from a die, and includes: a step S1 for acquiring the shape and residual stress immediately after springback, by analyzing springback of the press-formed part 1 and thereby acquiring the shape and residual stress of the press-formed part 1 immediately after springback; a residual stress alleviation/reduction setting step S3 for setting a value for residual stress that is alleviated and reduced in comparison to the residual stress of the press-formed part 1 immediately after springback; and a shape analysis step S5 for determining a shape whereby the moment of force is balanced for the press-formed part 1 for which a value that alleviates and reduces the residual stress has been set.
Inventors:
FUJII YUSUKE (JP)
URABE MASAKI (JP)
TOBITA SHUNSUKE (JP)
URABE MASAKI (JP)
TOBITA SHUNSUKE (JP)
Application Number:
PCT/JP2020/037618
Publication Date:
August 19, 2021
Filing Date:
October 02, 2020
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/00; B21D22/20
Foreign References:
| JP2008055476A | 2008-03-13 | |||
| JP2013198927A | 2013-10-03 | |||
| JP2013208622A | 2013-10-10 | |||
| JP5795151B2 | 2015-10-14 | |||
| JP5866892B2 | 2016-02-24 | |||
| JP2013113144A | 2013-06-10 |
Other References:
LIM, HOJUN: "Time-dependent Springback", INTERNATIONAL JOURNAL OF MATERIAL FORMING, 3 April 2008 (2008-04-03), pages 157 - 160, XP055848090
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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