SPRING-BACK AMOUNT DIVERGENCE ORIGIN SITE SPECIFICATION METHOD AND DEVICE

WIPO Patent Application WO/2020/218145

A1

The present invention provides a spring-back amount divergence origin site specification method and device for specifying the origin site of a divergence in spring-back amount of a molded article between CAE analysis and actual measurement. The present invention comprises a molded article driving stress distribution acquisition step for acquiring a driving stress distribution of a press-molded article, an analyzed driving stress distribution acquisition step for acquiring a driving stress distribution according to spring-back analysis, a stress difference distribution setting step for setting a stress difference distribution between the analyzed driving stress distribution and the molded article driving stress distribution in a bottom-dead-center molded article shape, a stress difference spring-back amount acquisition step for acquiring a spring-back amount according to the stress difference distribution, a changed stress difference spring-back amount acquisition step for changing a value of a region in part of the stress difference distribution and acquiring the spring-back amount, and a spring-back amount divergence origin site specification step for comparing the acquired spring-back amounts and specifying a site that is the origin of a divergence in the spring-back amounts.

OGAWA TAKESHI (JP)
URABE MASAKI (JP)
IIZUKA EIJI (JP)

PCT/JP2020/016698

October 29, 2020

April 16, 2020

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JFE STEEL CORP (JP)

B21D22/00; G06F30/10; G06F30/23

JP2013043182A	2013-03-04
JP2013071120A	2013-04-22
JPH0219639B2	1990-05-02
JP2007229724A	2007-09-13
JP2012206158A	2012-10-25
JP2013071120A	2013-04-22

See also references of EP 3960320A4

KUMASAKA Akira et al. (JP)

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