卡盘定心精度建模及其保持特性与修复方法  

Modeling of centering accuracy of chuck and its maintaining characteristics and restoration method

作　　者：王健健[1,2] 冯平法[1,2] 张建富[1,2] 吴志军[1,2] 张国斌 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,呼和浩特010051

出　　处：《吉林大学学报（工学版）》2016年第2期487-493,共7页Journal of Jilin University:Engineering and Technology Edition

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

摘　　要：为了提高三爪卡盘的精度保持性,通过建立卡盘定心精度及重复定心精度的计算模型,研究了卡盘主要零部件的磨损对卡盘定心精度的影响及精度修复方法。研究表明:卡盘零部件磨损导致的卡爪位置误差中径向误差是影响定心精度的主要因素;对于楔式三爪动力卡盘而言,重复定心精度的大小等于盘体与楔心套的配合间隙;只有当盘体与楔心套配合间隙的一半小于卡盘定心的系统误差时,才能够通过高爪配车修复卡盘长期使用后的定心精度;磨损引起盘体与楔心套配合间隙增大导致的卡盘精度失效不能通过对高爪进行配车来修复。To improve the accuracy preservation of three-jaw chuck,the effect of the abrasion of chuck components on its centering accuracy was investigated.The model of centering accuracy and repeatability of three-jaw chuck was developed.Results show that among the position errors of jaws induced by abrasion of chuck components,the radial position error dominates.For the wedge type power chuck,the repeatability accuracy is equal to the interval between chuck body and wedge plunger.Only when the interval between chuck body and wedge plunger is limited within the double systematic error of the centering accuracy,the method of turning top jaw can renovate the centering accuracy after long-term use of the chuck.But the accuracy inefficacy caused by the enlargement of the interval between chuck body and wedge plunger due to the abrasion cannot be renovated by turning the top jaw.

关 键 词：机床 三爪卡盘 定心精度 磨损 高爪配车 

分 类 号：TH161[机械工程—机械制造及自动化] TG751[金属学及工艺—刀具与模具]