The principle of torque equilibrium was adopted to construct the solving model of pressure center for progressive die. The formula was derived from solving model to calculate the offset value between the die center and the slide center, and the torque deviation varied with time was also given out. Based on this method, an optimization method was proposed and the objective function and constrained functions were established to decrease the deviation of the torque. Each stamping punch force was obtained and the value of center deviation was optimized, by using simulated annealing (SA) algorithm method combined with finite element technology. Take the progressive die of shell sheet as an example, the method was validated accuracy ancl efficiency to the optimization of the pressure center progressive clie through comparison with theory.

The motion process of progressive blanking and drawing dies was analyzed and a coordination design was implemented by using movement simulation technology and motion functions,in which way precision multi-position progressive dies can have a longer service life.A further study on the structural motion of precision progressive dies indicates that coordination of complicated structural motion system should be solved for the dies.

According to the friction analysis between punch and sheet during thin plate blanking,the calculating formula of friction force was derived and quantitative relationship between burnish band on the shearing surface of the sheet material and the wear on the punch flank was obtained.The grey prediction model of tool wear was established and its accuracy and efficiency were verified by high speed blanking experiment.

利用TopSolid的progress模决,计算出冲裁弯曲级进模带料冲压力与压力中心,并对"自由工位"进行互换,寻找出压力中心偏移较小的排样设计方案.然后,通过有限元数值模拟求解出回弹角,补偿其回弹并自动更新弯曲凸凹模.