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Abstract：
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On the basis of material mechanical test and forming limit analysis,the metal flow of the dangerous parts in trunk lid inner panel during the stamping process are studied by grid strain analysis technique,meanwhile the forming effects of two steel sheet are evaluated.It is shown that the forming method of dangerous parts in trunk lid inner panel belongs to bulge deep drawing deformation.The cold rolled sheet with relatively high r value and n value can obtain higher forming limit,correspondingly the forming safe allowance is relatively high.
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Reference：
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1 康永林 .现代汽车板的质量控制与成形性 .北京 :冶金工业出版社 ,1 999.
2 邓陟 ,王先进 .汽车用薄板的发展及对策 .钢铁 ,1 993 , 2 8(6) :73～ 78
3 于连仲 ,常志华 ,孙卫和 ,李春峰 .成形极限图FLD的简易确定 .机械工程学报 ,1 990 ,2 6 (4) :88～ 92
4 李硕本 ,崔令江 ,于连仲 ,李春峰 .板料单向拉伸失稳的研究 .锻压技术 ,1 989,1 4 (1 ) :1 5～ 1 9
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