拉深是板料冲压成形的关键工艺。拉深成形工艺参数优化是一个典型的多目标优化问题。该文在板料拉深成形数值模拟的基础上,确定了工艺参数多目标优化的待优化变量和优化目标,进而建立了优化数学模型,然后采用多目标遗传算法N SGA-II对该模型进行了优化。以某翼子板为例,采用N SGA-II算法对其拉深工艺参数进行优化,得到一组Pareto解,选择其中一组参数进行数值模拟,结果显示零件具有较好的成形性,说明该方法具有较好的优化效果。 Drawing is the key sheet metal stamping process. Deep drawing process parameters optimization is a typical multi-objective optimization problem. Based on the numerical simulation of sheet metal deep drawing, the multi-objective optimization variables and optimization targets of process parameters were determined, and then the optimal mathematical model was established. Then, the model was carried out by multi-objective genetic algorithm N SGA-II Optimized. Taking a fender as an example, N SGA-II algorithm was used to optimize its drawing process parameters to obtain a set of Pareto solutions. One set of parameters was selected for numerical simulation. The results showed that the part has better formability, The method has better optimization effect.