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模具磨损是影响模具使用寿命的重要因素之一,将正交试验法与冲压数值模拟相结合,综合评估了不锈钢冲压模具的模具硬度、摩擦系数和冲压速度对冲压模具磨损的影响,并确定最优影响因素组合。以汽车消音器外壳冲压模具为例,建立了冲压件和模具的计算机辅助工程模型,分别运用正交试验及参数试验方法进行仿真计算方案的设计。通过正交试验分析,获得了各因素对模具磨损的影响按从大到小的顺序依次为模具硬度、摩擦系数、冲压速度;同时,通过极差、方差等分析,发现模具硬度和摩擦系数对模具的磨损有显著影响。由两种试验方法对比发现,正交试验获得的磨损量比参数试验获得的磨损量减少了61.4%,最优参数组合为模具硬度65 HRC、摩擦系数0.08、冲压速度200 mm·s~(-1),该优化组合为减少模具的磨损量提供了一种参考。
Mold wear is one of the important factors that affect the service life of the mold. By combining the orthogonal test method with the numerical simulation of stamping, the effects of the mold hardness, friction coefficient and stamping speed of the stainless steel stamping die on the wear of the stamping die are comprehensively evaluated, Excellent combination of factors. Taking the automobile muffler shell stamping die as an example, a computer aided engineering model of stamping parts and dies was set up. The design of the simulation calculation scheme was carried out by using orthogonal test and parameter test method respectively. Through orthogonal test analysis, the influence of various factors on mold wear was obtained in descending order of mold hardness, friction coefficient and stamping speed. At the same time, through the analysis of range and variance, it was found that mold hardness and friction coefficient Mold wear has a significant impact. The comparison between the two test methods shows that the wear loss obtained by the orthogonal test is reduced by 61.4% than that obtained by the parameter test. The optimal combination of parameters is the die hardness of 65 HRC, the friction coefficient of 0.08 and the punching speed of 200 mm · s ~ (- 1), the optimized combination provides a reference for reducing the amount of wear of the mold.