锻压技术

齿条冷滚打成形摩擦系数的求解方法

英文标题：Method of solving friction coefficient in rack cold rolling-beating

作者：李嘉伟李言杨明顺李龙崔莅沐陈鑫

单位：西安理工大学

分类号：TG302

出版年,卷(期):页码：2019,44(3):50-58

摘要：

针对冷滚打成形摩擦系数的确定问题，首先对滚打轮与毛坯进行受力分析，建立了摩擦系数与滚打力、接触角和压力角之间的数学关系，然后对不考虑摩擦条件下的滚打力进行有限元仿真，根据仿真结果反求出接触角和压力角，最终结合实际实验得到的滚打力求得了滚打轮与毛坯之间的摩擦系数。采用这一方法求得了不同工艺参数条件下冷滚打成形的摩擦系数，利用所求摩擦系数进行了相应的仿真，仿真成形力与实验成形力误差小于5%；并对相同条件下的摩擦磨损实验进行了验证，证明了这一确定摩擦系数方法的有效性。

For the problem of determining the friction coefficient of cold rolling-beating, firstly, the force analysis of the rolling wheel and the blank was carried out, and the mathematical relationships between the friction coefficient and the rolling-beating force, the contact angle and the pressure angle were established. Then, the rolling-beating force was simulated without considering the friction, and the contact angle and pressure angle were inversely determined according to the simulation results. Finally, the friction coefficient between the rolling wheel and the blank was obtained by combining the rolling-beating force gained by actual test. Thus, the friction coefficients of cold rolling-beating under different process parameters were obtained by this method, and the corresponding simulation was conducted by the obtained friction coefficients. In addition, the error of the simulated forming force and experimental forming force was less than 5%, and the friction and wear experiments were verified to demonstrate the effectiveness of this method for determining the coefficient of friction under the same condition.

基金项目：

国家自然科学基金资助项目（51475366，51475146）；陕西省科技计划项目（2016JM5074）；西安理工大学博士学位论文创新基金项目（310-252071601）

李嘉伟（1992-），男，硕士研究生,E-mail：m13572575035_1@163.com;通讯作者：李言（1960-），男，博士，教授，博士生导师,E-mail：jyxy-ly@xaut.edu.cn

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