DEVICE AND METHOD FOR BEND TESTS ON METAL SHEET FOR AUTOMOBILE BODY AND BEND PERFORMANCE EVALUATION METHOD USING THIS DEVICE

Title:

DEVICE AND METHOD FOR BEND TESTS ON METAL SHEET FOR AUTOMOBILE BODY AND BEND PERFORMANCE EVALUATION METHOD USING THIS DEVICE

Document Type and Number:

WIPO Patent Application WO/2021/172252

Kind Code:

A1

Abstract:

The present invention addresses the problem of capturing an image of a strain state of a bend outside surface of a test piece by a camera without defocus during bend tests. This device for bend tests on a metal sheet for an automobile body is characterized by comprising a support member (1) for supporting two support parts (2) for a flat test piece (P) composed of a metal sheet for an automobile body, a punch (4) for performing bend tests involving bending the test piece (P) by pressing a portion of the test piece (P) between the two support parts (2) from the side opposite to the support member (1) side, and a camera (5) for capturing an image of a bend outside surface of the test piece (P) during bend tests by means of the punch (4) from the support member side, and also characterized in that the relative positions of the punch (4) and the camera (5) during the bend tests are fixed.

Inventors:

SAKAIDANI TOMOHIRO (JP)
SATO KENTARO (JP)
FUTATSUKA TAKAYUKI (JP)
KOMINE SHINSUKE (JP)

Application Number:

PCT/JP2021/006543

Publication Date:

September 02, 2021

Filing Date:

February 22, 2021

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

G01N3/20

Domestic Patent References:

WO2020129903A1

2020-06-25

Foreign References:

JP2009068919A	2009-04-02
JP2016003987A	2016-01-12
JPH1082726A	1998-03-31
JP2016080464A	2016-05-16
JP2014102131A	2014-06-05
JPH10318896A	1998-12-04
JP2009145138A	2009-07-02
CN210665329U	2020-06-02
JP2016080464A	2016-05-16

Other References: