一种龙门铣床误差实时补偿方法  

Real-time Error Compensation Method for Gantry Milling Machine

作　　者：林志杭 李殿新 冯平法[1,3] 张建富 马原[3] Lin Zhihang;Li Dianxin;Feng Pingfa;Zhang Jianfu;Ma Yuan(School of Mechanical Engineering,Tsinghua University,Beijing 100084,China;China Coal Research Institute Company of Energy Conservation,Beijing 100013,China;Graduate school at Shenzhen,Tsinghua University,Shenzhen 518055,China)

机构地区：[1]清华大学机械工程学院,北京100084 [2]煤科院节能技术有限公司,北京100013 [3]清华大学深圳研究生院,深圳518055

出　　处：《机械科学与技术》2020年第7期1035-1039,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51705281);深圳市基础研究计划(学科布局)项目(JCYJ20160428181916222)资助。

摘　　要：龙门铣床广泛应用于航空航天领域大型零件的精密加工,其几何与热误差均对加工精度有显著影响。本文基于西门子840D数控系统内置的补偿接口,以及作者提出的大型机床的关键误差分析、辨识及建模方法,在建立好的主轴热误差及主进给轴的几何与热综合误差数学模型的基础上,提出了一种大型龙门铣床主轴及进给轴多项主要变形的补偿方法,开发了相应的补偿系统,并实现了主轴热误差和主进给轴(x轴)综合误差的实时控制补偿,验证了该方法的有效性。Gantry milling machine is widely used in precision machining of large-scale parts of aviation and aerospace.Geometric and Thermal errors have significant influence on machining accuracy.A compensation method of multiple geometric and thermal deformation for gantry milling machine is proposed,based on SIEMENS 840D numerical control system,and the key error analysis,identification and modeling methods of large machine proposed in this paper,after the establishment of mathematical models of the thermal error of the spindle and the geometric and thermal comprehensive error of the main feed axis.The compensation system was developed,which can realize the real time control compensation of thermal errors of spindle system,and geometric and thermal errors of the main feeding(x)axis.

关 键 词：误差补偿系统 实时补偿 几何误差 热误差 龙门铣床 

分 类 号：TG156[金属学及工艺—热处理]