METHOD FOR EVALUATING POSSIBILITY OF FORMATION OF SHEAR EDGE

Japanese Patent JP2016211962

A

PROBLEM TO BE SOLVED: To provide a technique to evaluate possibility of formation of a material edge that is sheared after preforming precisely.SOLUTION: A plurality of data on the amount of shear equivalent to a deformation limit relative to distortion inclination by changing the distortion inclination at a shear edge by a hole extension test for a metal plate after preforming. From the plurality of data and the amount of shear equivalent to predeformation, the relationship of the distortion inclination to shear equivalent to an elongation flange deformation limit is obtained. From the formation limit line L and the formable range R of the shear edge obtained from the relationship, the possibility of formation of the shear edge relative to a predeformed metal plate by preforming is evaluated.SELECTED DRAWING: Figure 13

IIZUKA EIJI
YAMAZAKI YUJI
HIGAI KAZUHIKO

JP2015095861A

December 15, 2016

May 08, 2015

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JFE STEEL CORP

G01N3/28; B21D22/00; B21D28/00

JP2007232714A	2007-09-13
JP2007232715A	2007-09-13
JP2014115269A	2014-06-26
JP2009204427A	2009-09-10

吉田 健吾 KENGO YOSHIDA: "「予変形を受けた鋼板の破断限界の評価方法」", 材料とプロセス, vol. 17, no. 5, JPN6016026775, 1 September 2004 (2004-09-01), pages 1063, ISSN: 0003481541
臼田松男、石井良男、藤井力、正林央: "薄板成形における破断予測（第３報　曲げ曲げ戻し予変形材の変形特性と破断限界）", 第３７回塑性加工連合講演会後援論文集, JPN6016024501, 31 October 1986 (1986-10-31), pages 335 - 338, ISSN: 0003481542

Tetsuya Mori
Suzuki Isobe
Hide Tanaka Tetsu
Ichi Hirose
Toru Miyasaka

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