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以C75S高强度弹簧钢作为研究对象,运用Deform-2D软件对板料冲裁过程进行数值仿真,基于响应面法对C75S弹簧钢的冲裁工艺参数进行优化。借助中心设计组合法设计冲裁试验,并建立了工艺参数与模具最大磨损深度之间的响应面模型,通过分析得知:模具刃口圆角半径与冲裁速度对凸模磨损的交互式影响最大;模具刃口圆角半径与冲裁间隙的交互式影响次之;冲裁速度与冲裁间隙的交互式影响最小。利用Design Expert软件得出最优的冲裁工艺方案为:模具刃口圆角半径为1.84t,冲裁速度为7.60 mm·s-1,冲裁间隙为13.23%t,凸模的磨损深度为4.02×10-6mm。此外,借助冲压模具进行冲裁试验,利用毛刺高度间接验证模具的磨损,试验值与响应面法优化值之间的相对误差为14.19%,两者保持较好的吻合性,从而为板料冲裁模具磨损的优化提供了一种有效方法。
Taking C75S high-strength spring steel as the research object, Deform-2D software was used to simulate the blanking process of sheet blanks. The stamping process parameters of C75S spring steel were optimized based on response surface methodology. Designing the blanking test with center design method and establishing the response surface model between the process parameters and the maximum wear depth of the die. The analysis shows that the interactive influence of die radius and punching speed on the wear of punch The second is that the interaction between the die radius and the blanking clearance is the second one; the interaction between blanking speed and blanking clearance is the least. Design Expert software was used to obtain the optimum blanking process scheme as follows: the radius of die edge was 1.84t, the blanking speed was 7.60 mm · s-1, the blanking clearance was 13.23% t, the wear depth of punch was 4.02 × 10-6mm. In addition, the punching test was carried out by using the stamping die. The wear of the die was indirectly verified by the height of the burr. The relative error between the experimental value and the optimized response surface value was 14.19%. Both of them maintained good consistency, Optimization of die wear provides an effective method.