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Abstract：
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The shape of rear cover outer top is very complicated,and there are many local features. The stamping process is of six operations. During try-out,serious wrinkle had occurred in the fifth operation,which would damage surface quality and result in bad weldable. It was found that unreasonable restrike process is the main causation. Therefor,the restrike CAM was improved. First,a small pad was added. Second,material absorbing groove was added on the surface. Then,the structure of restrike block was re-designed. By means of these methods,wrinkle was ultimately eliminated and part's quality was evidently improved.
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AuthorIntro：
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Reference：
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[1]王昶,何玉林,胡亚民,等,轿车车身覆盖件冲压模具工艺补充面设计与应用[J].锻压技术,2006,31(5):100-103.
[2]孙玉,王义林.汽车覆盖件模具型面设计方法的研究[J].锻压装备与制造技术,2007,(1):83-86.
[3]崔令江.汽车覆盖件成形技术[M].北京:机械工业出版社,2003.
[4]倪洪启,刘相华,王国栋.板料冲压过程的数值模拟[J].锻压装备与制造技术,2004,(4):80-82.
[5]林忠钦.车身覆盖件冲压成形仿真[M].北京:机械工业出版社,2005.
[6]李明昆.板料成形的计算机数值模拟仿真技术[J].锻压装备与制造技术,2006,(4):95-97.
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