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以非线性有限元软件Dynaform为平台,保持凸模与坯料间的摩擦系数不变,分别将凹模与坯料间的摩擦系数取值为0.01,0.02,0.04,0.08和0.1,研究凹模与坯料间的摩擦系数对1716印涂铝盖冲压拉深过程中壁厚分布的影响;再将凹模与坯料间的摩擦系数保持不变,分别将凸模与坯料间的摩擦系数取值为0.1,0.125,0.15,0.17和0.18,研究凸模与坯料间的摩擦系数对1716印涂铝盖冲压拉深过程中壁厚分布的影响。结果表明:1716印涂铝盖末次拉深的相对合理摩擦条件是凸模与坯料间静摩擦系数取0.17,凹模与坯料间动摩擦系数取0.020。同时,生产试验表明,采用静摩擦系数为0.17、动摩擦系数为0.020的摩擦条件可以生产出质量合格的产品。
With the nonlinear finite element software Dynaform as the platform, the friction coefficient between the punch and the blank is kept unchanged, and the friction coefficient between the die and the blank is taken as 0.01, 0.02, 0.04, 0.08 and 0.1 respectively. The coefficient of friction between the 1716 aluminum cover stamping process of drawing the wall thickness distribution of the impact; then the friction coefficient between the die and the billet remain unchanged, respectively, the friction coefficient between punch and billet value of 0.1, 0.125, 0.15, 0.17 and 0.18, the effect of the friction coefficient between punch and blank on the wall thickness distribution during press-drawing process of 1716 printed aluminum cover was studied. The results show that the relative friction coefficient of 1716 aluminum foil cap is the static friction coefficient between punch and billet is 0.17, and the dynamic friction coefficient between die and billet is 0.020. At the same time, the production test shows that the static friction coefficient of 0.17, dynamic friction coefficient of 0.020 friction conditions can produce qualified products.