混联机床并联轴定位精度的激光测量与误差补偿  

Laser Measurement and Errors Compensation of Position Accuracy for Parallel Axis on Hybrid NC Machine Tools

作　　者：张立新[1] 黄玉美[1] 乔雁龙[1] 

机构地区：[1]西安理工大学机械与精密仪器工程学院

出　　处：《农业机械学报》2008年第2期163-166,共4页Transactions of the Chinese Society for Agricultural Machinery

基　　金：高等学校博士学科点专项科研基金资助项目(项目编号:20050700007);国际合作项目(项目编号:2004KW-13)

摘　　要：在分析混联机床并联轴定位精度的激光干涉测量原理和方法的基础上,采用干涉法检测了并联轴Z向的定位精度和重复定位精度,做出了并联轴的平均偏差特性曲线,获得了其线性位移定位误差数学模型;利用最小二乘法得到了混联机床并联轴定位误差补偿模型和增量补偿特性曲线;推导了并联机构动平台位姿和各驱动杆杆长的求解过程,进而对混联机床并联轴定位精度进行了有效补偿,得到了一种并联轴定位精度激光干涉测量方法和误差补偿模型的建立方法。Based on the detailed studying on the principles and methods of laser interferometry for setting accuracy of parallel axis on hybrid NC machine tools, the setting accuracy and resetting accuracy of parallel axis in Z direction has been inspected by interferometry and the characteristic curve of mean position deviation for parallel axis was plotted, by which the mathematical model of positional error for parallel axis in linear displacement was derived. The positional errors compensation model and increment compensation curve of parallel axis have been obtained by making use of least squares fitting. The position of parallel apparatus moving platform and length of the drive rods have been solved. The setting accuracy of parallel axis on hybrid NC machine tools was compensated. The methods of laser interferometry of setting accuracy and model building of error compensation for parallel axis were proposed.

关 键 词：混联机床 并联轴 精度 激光测量 误差补偿 

分 类 号：TH161.5[机械工程—机械制造及自动化] TN249[电子电信—物理电子学]