环境温度波动对精密卧式加工中心基础件几何精度的影响  

Impact of ambient temperature variation on geometrical accuracy of basic parts in precision horizontal processing center

作　　者：姜耀林 李旸[2] 赵万华[2] 张晓毅[3] 郑儒鸿 徐登辉 

机构地区：[1]浙江省机电设计研究院,浙江杭州310002 [2]西安交通大学机械制造系统国家重点实验室,陕西西安710054 [3]沈机集团昆明机床股份有限公司,云南昆明650203

出　　处：《机电工程》2012年第9期997-1001,共5页Journal of Mechanical & Electrical Engineering

基　　金：国家重大科技专项资助项目(2010ZX04001-021)

摘　　要：精密卧式加工中心不仅可以快速方便地完成复杂零件的加工,而且具有较高的加工精度。然而由于环境温度的波动变化,使得机床各部件尤其是床身、立柱等尺寸较大的基础件产生热变形,从而影响机床精度。针对以上问题,利用有限元方法对不同环境温度下床身和立柱的温度场和热变形进行了仿真分析,进而得到了环境温度波动幅值和周期对机床基础件几何精度的影响规律。研究结果表明,该影响规律可为恒温车间温度控制和机床热变形补偿提供一定的依据。Precision horizontal processing center is a kind of machine tool which can not only process parts with complex structures but also guarantee high machining precision. However, the temperature variation would bring about the thermal deformation of the machine tool parts. The bed and the column and other large parts would be influenced easily. Therefore, the accuracy of the machine tool would be decreased. Aiming at above proldems, with finite element method, the temperature fields and thermal deformations of the bed and the column were analyzed. It was found that the amplitude and the cycle of the varying ambient temperature have large effects on the geometrical accuracy of basic parts, and the laws of them were concluded. The results of research provides basis for the temperature control in the constant temperature workshop and the thermal error compensation for the machine tool.

关 键 词：环境温度波动 精密卧式加工中心 机床基础件 几何精度 

分 类 号：TG65[金属学及工艺—金属切削加工及机床] TH161[机械工程—机械制造及自动化]