Transactions of Materials and Heat Treatment

Title：Effect of material and object shape on accuracy of multi-point stretch forming

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ClassificationCode：TG386

year,vol(issue):pagenumber：2012,37(1):55-59

Abstract：

Multi-point stretch forming (MPSF) technology is that the traditional solid stretch die is replaced by discrete multi-point die, and the different shape parts can be formed by a multi-point stretch die. This technology saves the cost of die design and fabrication for products, and realizes the flexible fabrication. Multi-point stretch forming operation is a primary means to form a sheet metal of relatively small curvature with large deformation. Materials and the curvature of the target shape are important factors to affect results of multi-point stretch forming. By numerically analyzed the process of multi-point stretch forming with three materials and different curvature radiuses, the effects of material and object shape on the multi-point stretch forming were discussed. The results show that the shape errors are smaller in central regions than in marginal regions, and these are bigger in stretching direction than perpendicular to stretching direction. When the curvature radius of target shape is smaller, the shape error will be larger.

Funds：

国家自然科学基金资助项目(50775098);吉林大学“985工程”资助项目

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