锻压技术

基于响应面模型的多工步成形零件优化设计

英文标题：Optimum design of multi-step forming part based on response surface model

作者：刘维吴建军彭永前

分类号：TG386

出版年,卷(期):页码：2011,36(1):157-160

摘要：

针对多工步成形的阶梯盒形件容易出现拉裂缺陷的问题，选取板料最大减薄率为目标函数，结合面心立方的试验设计方法，采用有限元软件DYNAFORM对不同尺寸的零件成形过程进行模拟，建立基于移动最小二乘法的二阶响应面模型，以逐步近似代替设计参数与输出响应之间复杂的隐式关系，并运用遗传算法，在兴趣域内进行全局寻优，得到优化的设计尺寸。有效地避免了阶梯盒形件多工步成形过程中的拉裂，获得了质量合格的零件。

Focused on the problem of cracking which easily occurred in stepped boxed-shaped parts when multi-step forming, the maximal thinning of blank was chosen as the object function, and combining with the central composite face-centered design of experiment，the forming process of the parts with different sizes were simulated by finite element software DYNAFORM, the moving least square based on second order response surface models was gradually established to replace the complex and implicit relation between the design parameters and output response, and then, global optimum design in the region of interest was found out using genetic algorithm. The optimized design size was got. The stepped boxs cracks are effectively avoided during the multi-step forming to have the qualified part.

基金项目：

国家863计划（2008AA04Z120）

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