Method of closed loop springback compensation for incremental sheet forming process |
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Authors: | Fei Han Jian-hua Mo Pan Gong and Min Li |
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Affiliation: | (1) Construerende Technische Wetenschappen, Technische Mechanica, University of Twente, P.O Box 217, 7500 AE Enschede, The Netherlands;(2) Tata Steel RD&T, IJmuiden , The Netherlands |
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Abstract: | The closed loop control model was built up for compensating the springback and enhancing the work piece precision. A coupled
closed loop algorithm and a finite element method were developed to simulate and correct the springback of incremental sheet
forming. A three-dimensional finite element model was established for simulation of springback in incremental sheet forming
process. The closed loop algorithm of trajectory profile for the incremental sheet forming based on the wavelet transform
combined with fast Fourier transform was constructed. The profile of processing tool path of shallow dishing with spherical
surface was designed on the basis of the profile correction algorithm. The result shows that the algorithm can predict an
ideal profile of processing track, and the springback error of incremental sheet forming is eliminated effectively. It has
good convergence efficiency, and can improve the workpiece dimensional accuracy greatly. |
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Keywords: | incremental sheet forming spingback numerical simulation closed loop control |
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