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Patent Searching and Data


Title:
SPRINGBACK VARIATION CAUSE ANALYSIS METHOD
Document Type and Number:
WIPO Patent Application WO/2019/111555
Kind Code:
A1
Abstract:
A springback variation cause analysis method according to the present invention includes: steps (S1, S3) for calculating stress distributions at a press-forming bottom dead center under a first press-forming condition and a second press-forming condition that are set in advance; a step (S5) for calculating a stress difference distribution that is the difference between the stress distributions under the first press-forming condition and the second press-forming condition and for setting the stress difference distribution in a press forming part at the press-forming bottom dead center; a step (S9) for changing the value of a stress difference at a section of the press forming part in which the stress difference distribution is set; a step (S11) for calculating springback of the press forming part where the value of the stress difference is changed; and a step (S13) for analysing a portion that is a cause of variation in the springback due to dispersion of the press-forming conditions, on the basis of the springback calculated by changing the stress difference.

Inventors:
URABE MASAKI (JP)
Application Number:
PCT/JP2018/039022
Publication Date:
June 13, 2019
Filing Date:
October 19, 2018
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/00; G06F17/50
Foreign References:
JP2011183417A2011-09-22
JP2016087625A2016-05-23
JP2007229724A2007-09-13
JP2007229724A2007-09-13
JP2008055476A2008-03-13
JP2008049389A2008-03-06
JP2008087015A2008-04-17
JP2008087035A2008-04-17
JP2012206158A2012-10-25
JP2013071120A2013-04-22
JP2013043182A2013-03-04
Other References:
See also references of EP 3722016A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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