Tool path correction algorithm for single-point incremental forming of sheet metal |
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Authors: | Zemin Fu Jianhua Mo Fei Han Pan Gong |
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Affiliation: | 1. School of Mechanical Engineering, Shanghai Institute of Technology, 201408, Shanghai, People’s Republic of China 2. State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, People’s Republic of China 3. College of Mechanical and Electrical Engineering, North China University of Technology, Beijing, 100041, People’s Republic of China 4. Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, People’s Republic of China
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Abstract: | There exists some error between the manufactured part shape and the designed target shape due to springback of this part after forming. To reduce the error, an iterative algorithm of closed-loop control for correcting tool path of the single-point incremental forming, based on Fast Fourier and wavelet transforms, has been developed. Moreover, the data of the springback shapes, after unloading, of the sheet metal parts formed with the trial and corrected tool paths, used for iterative correction of tool path in the algorithm, are obtained with finite element model (FEM) simulation. Then, a truncated pyramid-shaped workpiece, whose average errors are +0.183/?0.175 mm, was made with the corrected tool path after three iterations solved by the above algorithm and simulation data. The results show that the tool path correction algorithm with Fourier and wavelet transforms is reasonable and the means with FEM simulation are effective. It can be taken as a new approach for single-point incremental forming of sheet metal and tool path design. |
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