锻压技术

基于灰色关联理论的汽车前纵梁塑性成形工艺再设计

英文标题：Redesign of plastic forming process for automotive fore-carling based on

作者：田植诚王成勇李伟李亨张贺宁

单位：合肥工业大学

分类号：

出版年,卷(期):页码：2014,39(1):46-51

摘要：

研究了汽车V形前纵梁的成形性，对比分析两种压料面工艺补充方案，建立了倒装单动拉深有限元模型。根据数值模拟结果，以压边力、摩擦系数、接触间隙、冲压速度为自变量设计了四因素四水平的正交试验模型，构造了最大增厚量、最大减薄率、最大回弹量与成形质量的关联函数。利用灰色关联分析法获得了多工艺参数对目标函数的关联度，并计算了目标函数的最优解，进而确定了一组最优工艺参数组合。再将最优工艺参数组合代入有限元模型进行模拟验证，较好地解决了起皱、破裂、折叠、局部过渡减薄等缺陷。最后依据几何位移修正回弹法对局部回弹进行了补偿，对模具型面进行了合理的设计变更。生产现场试模显示产品合格，缩短了传统试错法反复试模的时间。

The formability of the automotive V-shape beam was researched. Two kinds of designs of the addendum for the binder surface were analyzed. The FEM model was established with the inverted assembling structure of the forming die. According to the results of the numerical simulation, the blank holder force, friction coefficient, clearance between die and punch and punch velocity were used as independent variables in the orthogonal experiment. The correlation function of forming quality was designed with the independent variables of the maximum increased thickness, maximum reduction ratio and maximum springback amount.The relational grade of various stamping parameters to relevant objective functions were acquired, the optimized forming parameters were found out using gray relational analysis, and the optimal solution of objective function was calculated,then the optimized forming parameters were input into the FEM model to verify the product defects of wrinkling, rupture, folding, local thinning and soon. Finally the local spring-back was compensated according to the spring-back correction method of geometric displacement and the rational design for die face was changed. Identification by on-site mold testing, the end-product was qualified and the forming process was redesigned with less time than the traditional trial-and-error method.

基金项目：

家自然科学基金面上项目（51275146）;教育部科学研究重大项目（311025）;安徽省自然科学基金资助项目（1208085ME71）;省级重点实验室项目（2010sjsy0210）

田植诚（1988-）,男，硕士研究生

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