Patent ID: 6263717
Filing Date: 2001-07-24
Classification: B21D

Abstract:
A press-forming die set including a first die and a second die which are linearly movable toward each other in a predetermined press-forming direction, for engagement with each other to form a negative-angle portion on a workpiece placed on said second die, said press-forming die comprising:a rotary cam including a first negative-angle forming portion and disposed such that said rotary cam is rotatable about an axis of rotation inclined with respect to a bottom surface of said second die, said rotary cam being engageable with said second die and rotated about said axis of rotation in one of opposite directions when said first and second dies are moved toward each other in said press-forming direction, said rotary cam being rotated in the other of said opposite directions when said first and second dies are moved away from each other; anda forming cam including a second negative-angle forming portion which is held in engagement with said first negative-angle forming portion of said rotary cam while said first and second dies are held in engagement with each other, and which is disengaged from said first negative-angle forming portion when said first and second dies are spaced apart from each other.