Title:
TWO-STEP SHEARING METHOD FOR PREVENTING DAMAGE OF PRESS-CUTTING DIE FOR HIGH-STRENGTH MATERIAL
Document Type and Number:
WIPO Patent Application WO/2014/092273
Kind Code:
A1
Abstract:
The present invention provides a two-step shearing method for preventing damage of a press-cutting die for high-strength material. The two-step shearing method for preventing damage of the press-cutting die for high-strength material, according to the present invention, can promote productivity and can minimize the damage of a cutting die by improving the working speed through a press-shearing process using the cutting die when trimming, blanking, and piercing (punching) the high-strength material, enables the material to be cut into uniform cut surfaces by minimizing the generation of burrs, and can reduce a load of the press by reducing a shearing load for the material.
The two-step shearing method for preventing damage of the press-cutting die for high-strength material, according to the present invention, comprises: a cutting portion plastic-deforming step for primarily plastic-deforming a cutting portion of the material; and a cutting portion shearing step of cutting the cutting portion by adding shearing force to the cutting portion of the material.
Inventors:
KO DAE CHEOL (KR)
KIM BYUNG MIN (KR)
CHOI HONG SEOK (KR)
KIM BYUNG MIN (KR)
CHOI HONG SEOK (KR)
Application Number:
PCT/KR2013/006262
Publication Date:
June 19, 2014
Filing Date:
July 12, 2013
Export Citation:
Assignee:
INST RES & INDUSTRY COOPERATION PUSAN NAT UNIVERSITY (KR)
International Classes:
B21D24/16
Foreign References:
| JPH07227627A | 1995-08-29 | |||
| KR20100099082A | 2010-09-10 | |||
| JP2000271668A | 2000-10-03 | |||
| KR20100124424A | 2010-11-29 | |||
| JP2000210731A | 2000-08-02 |
Attorney, Agent or Firm:
STY PATENT LAW FIRM (KR)
특허법인 신태양 (KR)
특허법인 신태양 (KR)
Download PDF: