| This study takes the optimization of the forming process of aluminum alloy shell as the main research object. In order to improve the springback angle performance of aluminum alloy shell forming. Aimed at multiple forming process parameters that affect the springback angle:heat preservation forming temperature, mold clearance, friction coefficient and blank holder force, a univariate stepwise optimization study was carried out. With the increase of heat preservation forming temperature, the shell springback angle gradually decreased due to the decrease of flow stress and the increase of correction force; with the increase of die gap, the fillet radius of the variable die increased, and the sheet fit the die. The lower the degree is, the springback angle of the shell gradually increases; with the increase of the friction coefficient, the shape of the sheet is more suitable for the mold, thereby reducing the springback angle after forming; the blank holder force increases, and the inner/outer surface of the sheet The stress difference is greatly reduced, and the springback angle is gradually reduced. Through the step-by-step optimization of multiple parameters, the final optimized process is obtained as the heat preservation forming temperature of 310 ℃, the film material coefficient of 0.15, the die gap of 1.1 mm, the blank holder force of 12 kN, and the corresponding springback angle of 7.027°. |
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