汽车后悬支架冲压成型数值模拟分析

Numerical Simulation Analysis on Stamping Forming Process of Rear Suspension Bracket for Automobile

以某型号汽车后悬支架零件为例,在电子万能试验机上对该支架进行拉伸试验以获取其材料力学性能参数：屈服极限、屈强比和伸长率.在对其冲压成型工艺路线进行合理规划后,对扩展的毛坯、排样布局、折弯、翻边、扩孔和压凸印等冲压过程进行详细的数值模拟分析.在冲压成型过程中普遍存在折弯回弹量过大、翻边起皱、压凸印的破裂和扩孔起皱等缺陷,优化冲压设置参数有效提高零件的变形均匀性,应变矢量值控制在（-0.256788 ～0.284924）范围,对实际冲压成型生产过程有一定的借鉴和指导意义.

By taking a typical rear suspension bracket for automobile as the research object,the mechanical properties of bracket is obtained by tensile test using electronic universal testing machine,which is yield limits,yield tensile ratio and total elongation rate.With reasonable planning of extension of the casting,layout nesting,stamping forming process route,the numerical simulation analysis of fold bending,flanging,reaming and pressing convex printing is discussed in detail.The shortcomings of greater spring back for fold bending,flanging wrinkling,the rupture of compression convex printing and wrinkling of hole reaming is also universal existence in stamping forming process.The results show that the method can improve effectively deformation uniformity with optimization of stamping stetting parameters.The strain vector value controls in the range of （-0.256788 ～0.284924）.It is helpful for practical metal stamping forming in production process.