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Abstract：
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For the overlarge springback of an automobile engine outer panel after trimming, the multi-objective optimization model was constructed by response surface method (RSM). Then, with the average amount of springback (φ1) and stress distribution deviation function (φ2) set as objective function, the maximum reduction rate (Δt1) and the maximum thickening rate (Δt2) taken as the constraints of multi-objective optimization model, and the segmented drawbead resistance coefficient (x1-x4) and blank holder force (x5) selected as the effect factor of optimization, the second order response surface model was established by software Design-Expert, and the optimal combination of parameters were x1=16%, x2=60%, x3=15%, x4=20%, x5=700 kN. Furthermore, the scheme of optimized combination of parameters was verified by experiments, and the springback was controlled within 2 mm. The result indicates that the method can effectively optimize the process parameters of sheet metal forming and obtain qualified products.
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Funds：
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重庆市高等学校优秀人才支持计划项目（800213）
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AuthorIntro：
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周均（1981-），女，硕士，副教授
E-mail：zhoujun1981cq@163.com
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Reference：
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