| 摘要 |
PROBLEM TO BE SOLVED: To provide a drawing press die capable of preventing a corner portion from being left behind in the die as a scrap piece even when the corner portion of a peripheral edge of a work is deformed. SOLUTION: Circular holes 11, 12 are formed at parts of a fold pressure face 3 of a cushion ring 4 around a punch 2 and a fold pressure face 7 of an upper die 8 corresponding to a corner portion of a peripheral edge of a work W to relieve a burr or a warp (a deformed portion Wa) during the cutting which is easily formed on a corner portion of the work W, or a deformed portion Wa of the corner part caused by a collision during the conveyance, to the circular holes 11, 12. Since the deformed portion Wa is relieved into the circular holes 11, 12, the deformed portion Wa is not squeezed between a lower die 5 and the upper die 8, while the corner part of the work W smoothly follows the material flow during the drawing, to prevent generation of any scrap piece caused by a break of the corner part. COPYRIGHT: (C)2008,JPO&INPIT
|
