基于响应曲面法的波形弹簧片冲压工艺参数优化

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。

Optimization on stamping parameters of wave spring sheet based on response surface method

For the wave spring sheet of clutch,the parameters in stamping process were optimized based on response surface method.Then,the response value of forming height was obtained by central composite design and bending die,and a second-order response surface model between process parameters and forming height was established.The results show that the sequence of interactive influence of stamping process parameters on forming height is bending radius and stamping speed,die clearance and stamping speed,bending radius and die clearance.In addition,the die clearance,bending radius and stamping speed are taken as design variables,the forming height is taken as optimization objective,and response surface model is optimized by Design Expert software.Therefore,the optimized parameters of stamping process with bending radius 22.13 mm,die clearance 1.01t ram,stamping speed 2699.47 mm · s-1 and response value of forming height 1.782 mm are obtained by analysis.Furthermore,the experimental value forming height is 1.72 mm by rectification of process parameters.However,the response surface method has the greatest advantage in optimization of stamping process parameters compared with the optimized value 1.65 mm by orthogonal experiment.