Optimization of stamping process parameters for automobile hub cover plate based on deform and orthogonal test

In order to solve the problem of local crack in the stamping process of a car hub cover plate, the finite element analysis models of sheet metal, punch, die and blank holder were established by using DEFORM software. The formability of the hub cover plate was analyzed by simulating the whole stamping process. The simulation results show that the cracking position is consistent with the actual production results. The causes of cracking are analyzed and the improvement scheme is put forward. Taking the minimum thickness of the formed sheet as the evaluation index, the influence of sheet diameter, punch and die clearance, blank holder force and stamping speed on the evaluation index was studied based on the orthogonal test method. The optimal stamping process parameters of the hub cover plate were obtained through the extreme difference processing of the simulation data. The simulation results show that there is no tension crack phenomenon and the maximum thinning rate is only 10.6%, The risk of cracking is greatly reduced. Finally, through the actual production test, the obtained hub cover plate meets the production requirements, the sheet thickness distribution is consistent with the simulation results, and the error is small, which verifies the accuracy of the simulation results, and effectively solves the problem of hub cover plate cracking.