基于响应面模型和灰色关联度的板料成形工艺参数优化

以非线性有限元分析软件Dynaform为平台，基于二阶响应曲面法和灰色关联度，对非标准盒制件冲压成形工艺 参数寻优。首先，利用正交试验法获取不同因素的不同组合下的减薄率数值；再采用灰色关联度理论，找到对该盒形件 最大减薄率起主要影响的2个因素即等效拉延阻力和压边力；基于响应曲面模型，利用Design Exper软件，结合中心复合 设计法( CCD)建立优化目标和主要影响因素的二次回归模型；据成形极限图(FLD)的曲线设置板料的目标函数，可求得 等效拉延阻力和压边力的最优解。通过对比优化前后的数值模拟结果可知，优化后的冲压参数可以有效提高板料成形 性能和质量。

Optimization of Anomaly Box-Shaped Product Forming Based on RSM and Gray Relational Analysis

Based on gray relational analysis and RSM model, simulate analysis on the stamping process of a certain type of anomaly box-shaped product was proposed by using the finite element analysis software of Dynaform. The orthogonal was used to design to get the combinations in different parameter. Based on the gray relation theory the data were obtained from last step to get the mainly factors influencing the ratio of thinning, which included the blank holder force and drawbead restraining force. According to the central composite design ( CCD) and RSM, the optimization target and the two regression model of main influencing factors was established. Setting the objective function of sheet forming by the curves of FLD can, the optimal drawing resistance and blank holder force were acquired easily. The numerical simulation results show that the optimized parameters can effectively improve the formability and quality of sheet metal.