Transactions of Materials and Heat Treatment

Title：Incremental forming for ellipsoid parts under sheet rotation

Authors： Wang Yuhuai Peng Wei Wang Qiucheng Cao Jiang

Unit： Zhejiang University of Technology Hangzhou Normal University Qianjiang College

KeyWords： incremental forming sheet rotation forming trajectory geometric accuracy ellipsoid parts extension ring non-circular cross-section parts

ClassificationCode：TG386.4

year,vol(issue):pagenumber：2016,41(8):75-78

Abstract：

In the incremental forming of sheet that rotated continuously with clamp, it is very difficult to form the non-circular cross-section parts by the space rectangular coordinate. On the basis of analyzing the forming principle of sheet rotation and the movement of forming tool, an incremental forming method was studied for the non-circular cross-section parts with rotating sheet. For any contour layer of the ellipsoid, the mathematical relationship was established between the moving coordinates of forming tool along the parallel direction of the sheet surface with the sheet rotation angle. The movement of forming tool along the direction of perpendicular to the sheet surface was determined completely according to the layer increment. Furthermore, the ellipsoidal forming trajectory was designed and generated based on the coordination between sheet rotation and the movement of forming tool. After the analysis on geometric contour of experimental ellipsoid parts, the obvious bending deformation occurred at the surrounding open section with the maximum geometric difference of 7.06 mm generated by the down pressure of forming tool. The experimental ellipsoid part with the maximum geometric deviation 1.61 mm was obtained by adding the extension ring. The experimental results show that it can be formed by the incremental forming method supported by extension ring with sheet rotating for the non-circular cross-section parts with a high geometric accuracy.

Funds：

浙江省自然科学基金重点项目（LZ12E05003）

王玉槐（1981-），男，博士研究生，讲师彭伟（1958-），男，博士，教授，博士生导师

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