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Abstract：
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In this paper,the drawing characteristic of a rear frame for automobile and the in plane anisotropy of blank are analyzed.Using Barlat's planar anisotropic yield criterion for orthotropic sheets,the effect of blanking direction on the forming quality for U type part is studied,providing that the geometric shape of the die tools,the parameters of the press and the mechanic property of the material are not changed.It is proposed that the forming quality can be improved when the direction of the weakest ability for resisting transverse formability is set on the same direction with the open direction of a U type part.
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Reference：
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