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Abstract：
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The inner-wrinkle is easy to be produced at the suspending zone during drawing the curved surface parts.Increasing the holder force can avoid the inner-wrinkle,and the critical holder force is decided by some processing parameters.According to the deformation of drawing under blank holder,critical calculation for innere-wrinkle was carried out,and the checking condition for drawing cone and sphericity parts were gained.Then,the effect of main parameters on inner-wrinkle was studied by experiment for drawing cone parts,such as material characteristics,relative thickness,drawing coefficient and so on.The results show that decreasing material hardenability value,radius ratio of punch-die and the relative thickness,the trend of inner-wrinkle is increased;but reducing drawing coefficient,the inner-wrinkle is postponed.Therefore,reasonably selecting the processing parameters shall avoid the inner-wrinkle during drawing curved surface parts.
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Funds：
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长安大学青年科学基金(06Z11)
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AuthorIntro：
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Reference：
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