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以汽车离合器波形弹簧片作为分析对象,利用响应曲面法对冲压成形工艺参数进行优化。通过中心设计组合法及弯曲成形模具得出板料成形高度的响应值,建立了工艺参数与成形高度之间的二阶响应面模型,研究得知工艺参数对板料成形高度交互式影响的顺序依次为:弯曲半径与冲压速度、模具间隙与冲压速度、弯曲半径与模具间隙。将模具间隙、弯曲半径以及冲压速度作为设计变量,以板料成形高度作为优化目标,结合Design Expert软件对响应曲面模型进行优化,通过分析得出优化的冲压工艺参数:弯曲半径为22.13 mm,模具间隙为1.01t mm,冲压速度为2699.47 mm·s-1,成形高度的响应值为1.782 mm,经过工艺参数的修正,成形高度的试验值为1.72 mm。然而相比于正交试验得出的成形高度优化值1.65 mm,响应曲面法在波形弹簧片冲压成形工艺参数的优化中更具优越性。
Taking the automobile clutch wave spring as the analysis object, the stamping forming process parameters were optimized by the response surface method. The response value of the forming height of the sheet metal is obtained through the central design method and the bending forming mold, and the second-order response surface model between the processing parameters and the forming height is established. The order of the process parameters influencing the sheet forming height interactive effect is established Followed by: bending radius and stamping speed, die clearance and stamping speed, bending radius and die clearance. Taking mold clearance, bending radius and stamping speed as design variables, sheet metal forming height was taken as the optimization objective. Design Expert software was used to optimize the response surface model. The optimal stamping process parameters were obtained through analysis: the bending radius was 22.13 mm, The clearance is 1.01t mm and the stamping speed is 2699.47 mm · s-1. The response value of the forming height is 1.782 mm. After the process parameters are corrected, the test value of the forming height is 1.72 mm. However, compared with the optimum height of 1.65 mm, the response surface method has more advantages in the optimization of the process parameters of the corrugated sheet spring.