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与普通钢板相比,汽车覆盖件的高强度钢板冲压更易造成模具磨损,因而对模具结构形式要求更高。提出了一种新的考虑模具弹性变形的模具结构优化方法。将拓扑优化技术与板料成形数值技术相结合,对模具的结构形式进行了优化分析,并对冲压模具结构优化前后的动态分析结果进行了比较。结果表明:优化后的模具结构比优化前可减重约26.4%,最大应力降低48.3%。这证实该模具结构优化方法是有效的。
Compared with ordinary steel, automotive sheet metal stamping of high-strength stamping more likely to cause mold wear and tear, and thus require higher mold form. A new method of mold structure optimization considering mold elastic deformation is proposed. Combining the topology optimization technology and the numerical technique of sheet metal forming, the structure of the mold was optimized and the results of dynamic analysis before and after the stamping mold structure optimization were compared. The results show that the optimized die structure can reduce weight by about 26.4% and maximum stress by 48.3% compared with that before optimization. This confirmed that the mold structure optimization method is effective.