A novel springback compensation method based on finite element analysis and springback mechanics

There are various springback compensation methods, such as the Displacement Adjustment (DA) Method and the Force Descriptor Method (FDM). However, neither method is based on the springback mechanical equation, even though the cause of springback is the resultant stress including the bending moment at the end of the forming process. Therefore, in our proposed method, the resultant stress before springback is designed by users so that the metal sheet is deformed into the desired shape after springback. In this paper, Vbending is focused on as the target of compensation and the proposed springback compensation method for V-bending is introduced. We then verify effectiveness of the proposed method, which is compared with DA method. It was found that accurately compensated shapes that are deformed into the desired shapes could be obtained. Through the verification, it was found that the proposed method has some merits. First, not only the curvature but also other working parameters such as the punch load can be considered in the design process. Second, it is possible to achieve a convergence rate higher than that of DA method. Third, the lower frequency of forming analysis reduces the computation time.