A MECHANICS MODEL FOR SHEET-METAL STAMPING USING DEFORMABLE DIES

This paper studied the deformation mechanisms of sheet metals stamped by rigid punches and deformable dies. Emphasis was placed on the devel opment of elastic-plastic zones in the sheet workpieces, on the functi ons of the die parameters and on their correlations with spring-back. It was found that the reduction of spring-back was due mainly to the i nterface interaction offered by the dies. The paper provides new insig ht into processing techniques subjected to plane-strain conditions.