侧围外板冲压工艺稳健性优化设计

为了评价随机因素波动对覆盖件冲压成形质量影响，以侧围外板成形为例，在有限元仿真模型基础上，将实验设计、响应面法相结合，获得不考虑材料性能波动条件下最优工艺解；在此基础上通过蒙特卡洛法构建质量指标均值与标准差响应面模型，获得最优的稳健工艺解.案例表明，稳健性设计方法能够显著降低零件缺陷率，具有很好的可靠性.该方法还可应用在产品设计阶段，评估工艺、材料性能波动对冲压质量的影响，减少调试周期.

Robust Optimization for an Autobody Outer Panel Stamping Process

In the case of an autobody outer panel stamping process, a meta model based on FE simulation, design of experiment, response surface methodology(RSM) and Monte Carlo method was constructed and the deterministic optimization result was obtained. By constructing and solving the robust optimization model composed of mean and standard deviation of quality index, the robust optimal solution was obtained and compared with the deterministic optimization result. It is demonstrated that the product quality variations are reduced significantly, and quality targets (reject rate) are achieved under the robust optimal solution. This method can also be used during the early phase of product and tooling design to reduce commissioning period.