基于Dynaform的印涂铝盖冲压拉深摩擦条件的数字化设计技术

Digital design on friction condition of printing and coating aluminium covers in the deep drawing process based on Dynaform

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。

Based on nonlinear finite element software Dynaform and the unchanged friction coefficient between punch and blank,the influences of friction coefficient between die and blank on the wall thickness distribution of printing and coating aluminium covers 1716 were studied with the different friction coefficients 0.01,0.02,0.04,0.08,0.1 respectively.Then,the unchanged friction coefficient between die and blank,the influences of friction coefficient between punch and blank on the wall thickness distribution of printing and coating aluminium covers 1716 were studied with the different friction coefficients 0.1,0.125,0.15,0.17,0.18 respectively.The results show that in the last drawing process the relatively reasonable static friction coefficient between punch and blank is 0.170,and dynamic friction coefficient between die and blank is 0.020.