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.

针对级进模压力中心的求解及优化,提出应用转矩平衡原理建立带料压力中心求解模型的方法,推导出了压力中心与滑块中心偏离值、滑块中心两侧转矩偏移等量随时间变化的计算公式。在中心偏移优化法的基础上,提出了一种使滑块中心两侧转矩偏移最小的优化方法,建立了相应的目标函数与约束函数。结合有限元模拟技术,计算了各工序中凸模的冲压力随时间的变化情况,并使用模拟退火算法,迭代求解了最优带料压力中心偏移值。以壳形电子零件的级进模为例,与理论计算作比较,验证了上述方法的有效性。

压力中心, 级进模, 中心偏移, 优化