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Abstract：
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The drawbead plays a very important role in automobile covering part forming processes. The blank deformation size and deformation distribution can be controlled in large range by using drawbead,and many kinds of quality problems from forming processes,such as crack,wrinkle,distortion,etc. can be restrained. The geometry parameter of the drawbead can have an important effect on the processes. Rectangle drawbead was taken as an example to establish the restraining force FEA calculating model. And the analysis of the relationship between the geometry parameter of drawbead and the restraining force was done here. The result indicates that the restraining force of drawbead is in inverse proportion to the radius of the concave groove and the convex drawbead,while the restraining force is in direct proportion to the height of the drawbead. Combined with a car B-column strengthened sheet,the geometric parameters of drawbead were optimized. The best forming quality could be obtained when some of the geometry parameters were set as follows:The height was 8 mm and the circle radius of concave grove and convex drawbead was 3 mm of equivalent drawbead 2#; the height was 4 mm and the circle radius of concave groove and convex drawbead was 6 m of equivalent drawbead 1#.
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Funds：
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国家自然科学基金资助项目(50275100);;
校人才引进基金(R0820103)
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AuthorIntro：
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Reference：
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