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摘要
Taking the automobile side panel as an object, the whole torsional springback state of the formed covering parts was studied by finite element modeling and laser full-area scanning. Both modeling and analysis of the offset compensation for characteristic areas with different compensation coefficients were carried out. It is found that the weak influence zone of the compensation is within the area of two equivalent bending lines', and the transmission of the compensation effect is poor. Further experiments show that the feature shape, such as sharp style line and door frame hinders the transmission of the springback compensation correction effect. Based on the above investigation, the compensation strategy for strong and weak influence zones was put forward. After actual die debugging and matching the optical scanning point cloud and digital model, it is found that the better control accuracy of the springback compensation can be obtained using radical and conservative compensation strategies of shape to deal with weak zone and strong zone respectively. ? 2021, Editorial Board of Journal of Plasticity Engineering. All right reserved.
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