优化模具,提高模具寿命

Optimize Die and extend service of dies

主要从力学、金属塑性变形的角度，提出优化模具设计的一套理论，使挤压模的设计更加合理，达到提高模具寿命的目的。

This thesis puts forward a set of theory mainly from the aspects of mechanics and metal plastic deformation, to make extrusion dies design more resonable and extend the service time of dies.