摘要
激光干涉仪已成为PCB数控机床中测量定位与重复定位精度的标准仪器。针对测量数据不稳定的问题,分析激光干涉仪测量原理,得出测量距离与波长和脉冲数之间的关系;对生产现场环境模块数据进行测量,环境模块变化量对波长总的补偿量为0.23μm,与实际误差相比,波长变化导致的误差几乎可以忽略,通过测量得出测量精度不稳定的主要原因是横梁X轴连接杆的变形。针对该原因进行了结构的重新设计,实现了精度补偿及测量的稳定。
The laser interferometer has become a standard instrument in measuring the positioning accuracy and resetting accuracy of PCB NC machine. Aiming at the measuring data instability about positioning and repositioning precision,the measurement principle of the laser interferometer was studied,the relationship between the measurement distance and the wavelength and pulse number was obtained. The environment module data in production field were measured,the total compensation of wavelength variation was 0. 23μm,so the deviation caused by wavelength variation was almost negligible compared with the actual error. The main reason for the instability of measurement accuracy was the deformation of X axis joining pole. The structure of the X axis joining pole was redesigned.The stability of the accuracy compensation and measurement was achieved.
作者
贾平平
JIA Pingping(School of Mathematics and Physics, Weinan Normal University, Weinan Shaanxi 714099, Chin)
出处
《机床与液压》
北大核心
2018年第8期129-131,共3页
Machine Tool & Hydraulics
基金
陕西省教育厅科研项目(15JK1252)
陕西省军民融合基金研究项目(16JMR04)
渭南师范学院院级科研项目(17YKF05)
关键词
定位精度
PCB钻孔机
波长
激光干涉仪
Positioning precision
PCB drilling machine
Wavelength
Laser interferometer