高速旋转动力卡盘动态夹紧力的有限元计算方法  

Finite element computing method of dynamic clamping force of high-speed rotating power chuck

作　　者：王健健[1,2] 冯平法[1,2] 张建富[1,2] 闫培龙 

机构地区：[1]清华大学机械工程系,北京100084 [2]清华大学精密超精密制造装备及控制北京市重点实验室,北京100084 [3]呼和浩特众环集团,内蒙古呼和浩特010051

出　　处：《华中科技大学学报（自然科学版）》2015年第3期7-11 27,27,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家科技重大专项资助项目(2012ZX04002-061);摩擦学国家重点实验室基金资助项目(SKLT2013B03);北京市科技计划资助项目(D131100002713003)

摘　　要：针对液压动力卡盘的设计和使用过程中,动态夹紧力理论计算模型过于复杂而导致适用性差的问题,提出了楔式动力卡盘动态夹紧力的有限元计算方法.该方法通过对拉杆施加螺栓预紧力,并分步加载,来模拟液压锁的作用,考虑了卡盘和工件刚度等因素的影响,动态夹紧力的测量实验验证了该方法的有效性.基于该有限元计算方法,研究卡盘的使用参数、主要相对运动接触面间的摩擦系数、卡爪材料等对动态夹紧力的影响规律,为动力卡盘的优化设计提供技术支持.The theoretical calculation model of dynamic clamping force is too complicated to be conven‐iently used in the design and operation of chuck .A finite element calculation method was developed to predict dynamic clamping force ,and a serial of experiment was performed to validate the method .A stepping load method was used in the finite element model ,in which the load process was carried out in two steps .In the first load step ,a bolt pretension was loaded on the draw tube to simulate the in‐put force ,and in the second load step ,the bolt pretension was locked as an analogy to the function of the hydraulic lock .The dynamic clamping force characteristics were studied in terms of workpiece stiffness ,operation parameter ,lubrication conditions ,and material of jaws .The finite element analy‐sis (FEA) method raised in this text can play an important role for design ,manufacture and utilization of power chuck .

关 键 词：卡盘 有限元计算 动态夹紧力 刚度 摩擦 卡盘设计 

分 类 号：TG506[金属学及工艺—金属切削加工及机床]