压力中心, 级进模, 中心偏移, 优化

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 and efficiency to the optimization of the pressure center progressive die through comparison with theory.