Transactions of Materials and Heat Treatment

Title：Optimized trajectory without undersurface bump based on single-point NC incremental forming method of sheet metal

Authors： Wu Jian1 Zeng Xucheng1 Wu Hanyu2

Unit： 1.School of Mechanical and Energy Engineering Zhej iang University of Science and Technology 2.Gongyuan Campus Zhejiang Hangzhou High School

KeyWords： incremental forming geometric accuracy surface quality forming path forming time forming step distance

ClassificationCode：TG386

year,vol(issue):pagenumber：2022,47(9):90-98

Abstract：

In order to study the best path in NC incremental forming of flat-bottomed parts to improve forming accuracy, surface quality and forming efficiency. Therefore, for the circular truncated cone model, four kinds of forming paths were used for comparative experiments, which were contour line path, path of each layer from inside to outside, path of contour line+bottom from inside to outside and path of contour line+multi-layer bottom from inside to outside, and three different step distances were set on the bottom layer for the path of multi-layer bottom. The results show that the path of contour line+bottom from inside to outside causes the conical surface to sink on the bottom of part, while the path of each layer from inside to outside and the path of contour line+multi-layer bottom from inside to outside can not only eliminate the bulging on the bottom, but also avoid sinking phenomenon on the bottom. When the step distance of the bottom layer for the path of multi-layer bottom is set to 0.2 mm, the maximum error of the part bottom is 0.16 mm, and replacing the path of each layer from inside to outside with the path of multi-layer bottom from inside to outside can significantly shorten the forming time. Reducing the step distance of the bottom layer for the path of multi-layer bottom can not only improve the surface quality of the part bottom, but also improve the geometric accuracy of the part.

Funds：

国家重点研发计划(2017YFD0401304-3)

吴坚（1965-），男，硕士，教授 E-mail：wujian@zust.edu.cn

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