METHOD FOR ESTIMATING SURFACE SHAPE DEFECT GENERATING REGIONS, METHOD FOR ESTIMATING SURFACE SHAPE DEFECT SOURCE REGIONS, SURFACE SHAPE DEFECT GENERATING REGION ESTIMATING DEVICE, SHAPE DEFECT SOURCE REGION ESTIMATING DEVICE, PROGRAM AND RECORDING MEDIA

Title:

Document Type and Number:

WIPO Patent Application WO/2016/121638

Kind Code:

A1

Abstract:

Provided is a method for estimating surface shape defect regions that estimates regions where a surface shape defect will occur in a plastic worked article obtained by plastic working a workpiece. The method for estimating surface shape defect generating regions comprises a step of obtaining a first stress distribution that obtains a first stress distribution σ(T1), a step of obtaining a second stress distribution that obtains a second stress distribution σ(T2), a step of obtaining a comparative stress distribution that obtains a comparative stress distribution σ(T1, T2), a step of obtaining a segmented comparative stress distribution that obtains a segmented comparative stress distribution σDIV(T1, T2) and a step of estimating surface shape defect generating regions that estimates whether or not each segmented region Dk is a region that will generate surface shape defects.

Inventors:

KUWAYAMA TAKUYA (JP)
ARIGA TAKASHI (JP)

Application Number:

PCT/JP2016/051821

Publication Date:

August 04, 2016

Filing Date:

January 22, 2016

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

B21D22/00; G06F17/50

Domestic Patent References:

WO2010073756A1

2010-07-01

Foreign References:

JP2004209500A	2004-07-29
JP2005177837A	2005-07-07
JPH11319971A	1999-11-24
JP5068783B2	2012-11-07
JP4894294B2	2012-03-14
JP2009286351A	2009-12-10

Other References: