Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10673160 | CIRP Annals - Manufacturing Technology | 2012 | 4 Pages |
Abstract
A punching process of a small hole in a die-quenched steel sheet having high strength using local resistance heating of a shearing zone was developed to decrease the punching load. Uniform temperature in the circular shearing zone of the hole was obtained by optimising heating conditions for a pair of rectangular electrodes. The punch load and the burnished surface area for the heating at 500 °C were about 1/3 smaller and 2 times larger than those for the cold punching, respectively, and the occurrence of delayed fracture around the punched hole was prevented by the heating above 500 °C.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Industrial and Manufacturing Engineering
Authors
Ken-ichiro Mori, Tomoyoshi Maeno, Yoshihiro Maruo,