将双向运动斜楔与旋转斜楔进行了对比，在侧围板外覆盖件翻边模具中采用旋转斜楔成形机构，大大提高了生产效率。

The application of the rotational graded wedge mechanism in a flanging die for the shell plate metal sheets greatly raises the production efficiency.

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使用UG三维CAD软件对汽车侧围外板零件进行三维建模，并转换到Dynaform中建立了侧围外板零件的有限元模型；

We build the three-dimension numerical model for the automobile's side frame outer panel by the CAD software, UG and translate it into the DYNAFORM for building its FEM model;

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