Title:
METHOD FOR IDENTIFYING VARIATION FACTOR PORTION OF SPRINGBACK AMOUNT
Document Type and Number:
WIPO Patent Application WO/2020/158062
Kind Code:
A1
Abstract:
The present invention is a method wherein: a residual stress distribution for a press-formed article 1 at a bottom dead center point is calculated under both a first and second press-forming condition (S1, S3); a springback amount for the press-formed article 1 press-formed under the first press-forming condition is calculated (S5); the residual stress in a region in part of the press-formed article 1 under the first press-forming condition is substituted for the residual stress of the press-formed article 1 under the second press-forming condition (S7); a springback amount for the press-formed article 1 for which the residual stress has been substituted is calculated (S9); and a variation factor portion of the springback amount due to variation in the press-forming conditions is identified on the basis of the difference between the springback amount calculated by substituting the residual stress value and the springback amount under the first press-forming condition (S11).
Inventors:
URABE MASAKI (JP)
Application Number:
PCT/JP2019/040878
Publication Date:
August 06, 2020
Filing Date:
October 17, 2019
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/00
Foreign References:
| JP2007229724A | 2007-09-13 | |||
| JP2008087024A | 2008-04-17 | |||
| JP2007229724A | 2007-09-13 | |||
| JP2008055476A | 2008-03-13 | |||
| JP2008049389A | 2008-03-06 | |||
| JP2008087015A | 2008-04-17 | |||
| JP2008087035A | 2008-04-17 | |||
| JP2012206158A | 2012-10-25 | |||
| JP2013071120A | 2013-04-22 | |||
| JP2013043182A | 2013-03-04 |
Other References:
See also references of EP 3919197A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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