五轴数控机床非线性误差建模及补偿方法  

Nonlinear Error Modeling and Compensation Method for Five-axis CNC Machine Tools

作　　者：王艳红[1] 喻伟男 李冬[1] 崔悦 WANG Yan-hong;YU Wei-nan;LI Dong;CUI Yue(School of Artificial Intelligence,Shenyang University of Technology,Shenyang 110870,China;Neusoft Medical System Co.,Ltd.,Shenyang 110167,China)

机构地区：[1]沈阳工业大学人工智能学院,沈阳110870 [2]东软医疗系统股份有限公司,沈阳110167

出　　处：《组合机床与自动化加工技术》2022年第2期25-28,共4页Modular Machine Tool & Automatic Manufacturing Technique

摘　　要：针对五轴数控机床后置处理中由于平动轴和旋转轴的联动产生的非线性误差,提出一种基于误差建模的非线性误差在线预测与补偿方法。根据任意两个相邻刀位数据点产生的非线性误差,获得误差的分布特征,建立起误差分布模型;利用最小二乘法求解出非线性误差的数学表达式,经与误差许用值相比较来确定新的刀位点,从而实现非线性误差的在线预测及补偿。以实际加工数据为例,在MATLAB环境下进行仿真研究,验证了所提出方法的有效性。In the post-processing of five axis CNC machine tool,the nonlinear error will be caused by the linkage of translation axis and rotation axis.In order to reduce its influence on machining accuracy,a online prediction and compensation method for nonlinear error based on error modeling is proposed.The error distribution characteristics were obtained according to the nonlinear error generated by any two adjacent tool bit points,and thus the error distribution model was established.Furthermore,the least square method was used to solve the mathematical expression of nonlinear error,and a new tool point was determined by comparing it with the allowable error value,so as to realize the online prediction and compensation of nonlinear error.Taking the actual processing data as an example,the simulation research is carried out under MATLAB environment.The simulation results show that the proposed nonlinear error compensation approach is effective and efficient.

关 键 词：非线性误差 误差建模 误差补偿 后置处理 五轴数控机床 

分 类 号：TH161[机械工程—机械制造及自动化] TG502[金属学及工艺—金属切削加工及机床]