数控机床在机检测中触发式测头误差变速补偿  

Triggered Probe Error Speed Compensation in On-machine Measurement of Machine Tool

作　　者：白克[1] 黎智 吴立辉[3] BAI Ke;LI Zhi;WU Li-hui(Henan institute of Economics and Trade,Zhengzhou 450000,China;Equipment Manufacturing Industry Robot Application Technology Laboratory,Deyang Sichuan 618000,China;不详)

机构地区：[1]河南经贸职业学院,郑州450000 [2]四川省装备制造业机器人应用技术工程实验室,四川德阳618000 [3]河南工业大学机电工程学院,郑州450052

出　　处：《组合机床与自动化加工技术》2021年第2期91-94,98,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金资助项目(61203179,71201048);河南省高等学校重点科研项目(16A460025)。

摘　　要：针对机床触发式测头进行系统误差校正时,需要通过数控机床控制器进行计算,从而导致操作困难且精度不高的问题,提出了一种新的测头系统误差补偿方法。该方法可以通过修改该方向上的测量速度,来对给定方向上的测头预行程进行校正,从而显著降低测头的误差。由于可以离线计算所有测量速度,因此控制器无需进行任何运算。分别在实验室和真实在机测量环境中,使用三维触发式测头对所提方法进行了测试。研究结果表明:该方法能够通过误差变速补偿实现触发式测头在机测量,无需控制器的复杂计算并且将误差降低了大约10倍,测头的误差从16.8μm减小到1μm。In order to solve the problems of difficult operation and low precision caused by the calculation through the numerical control machine tool controller when the trigger probe of the machine tool is used for system error correction,a new probe system error compensation method is proposed.This method can correct the pre-stroke of the probe in a given direction by modifying the measurement speed in this direction,thus significantly reducing the error of the probe.Since all measurement speeds can be calculated offline,the controller does not need any calculation.The proposed method is tested in laboratory and real in-machine measurement environment respectively using a three-dimensional trigger probe.The results show that the proposed method can realize the trigger probe measurement in the machine through error variable compensation,without complicated calculation of the controller,the error can be reduced by about 10 times,and the probe error can be reduced from 16.8μm to 1μm.

关 键 词：数控加工 机床 触发式测头 误差补偿 在机测量 

分 类 号：TH166[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]