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基于Autoform-Sigma的汽车顶盖后横梁冲压工艺参数优化
英文标题:Process parameters optimization on rear cross beam of car roof panel based on Autoform-Sigma
作者:李英 焦洪宇 牛曙光 
单位:常熟理工学院 
关键词:顶盖后横梁 冲压 开裂 起皱 工艺参数优化 Autoform-Sigma 
分类号:TG385.2
出版年,卷(期):页码:2015,40(9):16-20
摘要:

以汽车顶盖后横梁为研究对象,利用Autoform软件对其进行冲压数值模拟。根据首次模拟结果选择开裂、起皱等缺陷位置附近的拉延筋系数及压边力为设计变量,利用Autoform-Sigma模块对其冲压工艺参数进行优化。经过123次迭代,当Sigma 优化收敛时,获得了最优模拟结果并确定了最优冲压工艺参数。最优模拟结果表明,原开裂区域未出现开裂或存在破裂风险,且变形不充分的区域大幅减小,同时主应变和减薄率等指标大幅度下降。按优化后的最优冲压工艺参数进行冲压成形试验, 成形件未出现起皱、开裂缺陷,与数值模拟结果一致,验证了冲压工艺参数优化的正确性。
 

For the rear cross beam of car roof panel, the numerical simulation of its forming process was conducted by Autoform. Based on the results of the initial stimulation, blankholder force and drawbead coefficients nearby defects like fracture and wrinkle were chosen as the design variable, and then process parameters were optimized by Autoform-Sigma. When the optimization was convergent, the optimal result was obtained after 123 iterations and the optimal stamping process parameters were confirmed. The optimal result shows that defects like fracture and wrinkle do not appear in original fracture areas, and the areas of inadequate deformation decreases, as well as principal strain and thinning ratio declines drastically. Based on the above optimal process parameters, stamping tests were carried out, and productions were obtained without defects of wrinkle and crack, which are consistent with the numerical results, and the correctness of stamping process parameters optimization was verified sufficiently.

基金项目:
国家自然科学基金资助项目(61404012);江苏省科技计 划项目(BE2011096)
作者简介:
李英(1979-),女,硕士,讲师;通讯作者:焦洪宇(1981-),男,博士,讲师
参考文献:


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