数控机床XY工作台插补中滤波技术  

Research on Filtering in the Interpolation Algorithm of XY Table of CNC Machine Tool

作　　者：陈振炜 李艳林 阴雷鸣 朱进全 CHEN Zhenwei;LI Yanlin;YIN Leiming;ZHU Jinquan(Jinan Bodor CNC Machine Co.,Ltd.,Jinan 250000,China)

机构地区：[1]济南邦德激光股份有限公司,济南250000

出　　处：《组合机床与自动化加工技术》2024年第4期154-158,163,共6页Modular Machine Tool & Automatic Manufacturing Technique

摘　　要：在插补过程中,程序段与程序段之间在衔接处的转向,导致在程序段衔接处产生加速度突变,容易引起机床震动,为平滑加速度,对各轴速度进行低通滤波,对各轴速度进行低通滤波即是对各轴的速度曲线进行平滑,从而消除加速度突变,使得机床运行平稳。基于数控机床XY工作台进行研究,采用有限脉冲响应(FIR)数字滤波器进行轴滤波,证明了对轴位置点滤波卷积运算,即是对速度进行滤波,并且对滤波产生的轮廓误差进行分析,并且结合实际数控机床加工情况,对滤波后产生的进给量过小问题进行分析并做补偿处理。该方法应用于数控激光切割系统,结果证明该方案能改善系统性能,提升系统加工的平稳度。In the process of interpolation,the turning between the program segments at the connection point leads to the sudden change of acceleration at the connection point of the program segments,which is easy to cause the vibration of the machine tool.In order to smooth the acceleration,the low-pass filtering of the velocity of each axis is carried out.The low-pass filtering of the velocity of each axis is to smooth the velocity curve of each axis,so as to eliminate the sudden change of acceleration and make the machine run smoothly.Based on the XY table of CNC(computerized numerical control)machine tool,the finite impulse response(FIR)digital filter is used to filter the axis velocity.It is proved that the filtering convolution operation of the axis position points is to filter the velocity,and the contour error generated by the filtering is analyzed.Combined with the actual processing of CNC machine tool,the problem of too small feed generated after filtering is analyzed and compensated.This method is applied to a CNC laser cutting system,and the results show that this scheme can improve system performance and enhance the smoothness of system processing.

关 键 词：S形加减速 插补器 FIR数字滤波器 滤波误差控制 滤波补偿 

分 类 号：TH16[机械工程—机械制造及自动化] TG659[金属学及工艺—金属切削加工及机床]