An analytical model of laser bending angle under preload

Abstract

An analytical model establishment of laser bending angle is important in understanding its forming mechanism and predicting its bending angle. Meanwhile, laser thermal bending under preload is a new direction of laser research. Therefore, an analytical model of laser bending angle for buckling mechanism under preload is established in this work. The proposed model is established on a thermal buckling angle model without preload by analyzing the stress and strain in the heating zone and considering the preload factors. In addition, the range of machining parameters and the preload values that satisfy the model are presented. The accuracy of the bending angle that is predicted by the model is verified by experiments. Compared with the experimental results, the average error of bending angle is less than 3.7% under different preloads and 5.1% under different laser powers. Overall, results showed that the proposed model can accurately predict the bending angle.