【摘要】 数控铣削技术加工的产品有结构精度高、表面质量好等优点,所以数控铣床的定位精度在现代企业竞争中发挥着核心作用。定位误差主要包括反向间隙误差,螺距误差,重复定位精度。文中利用LaserXL-30激光干涉仪对MVC850B数控铣床X、Y轴的定位误差进行检测,并采用Origin软件对测量数据进行处理,分析误差产生的规律。通过对三类误差的深入分析,得到其各自的主要影响因素。反向间隙误差主要由丝杆螺母的间隙引起;螺距误差主要由丝杆螺距误差的累积以及导轨直线度误差造成;重复定位精度主要与机床的振动等有关。此次分析为减小定位误差提供依据。更多还原

【Abstract】 CNC milling technology products have the advantages of high precision and good surface quality, so the positioning accuracy of CNC milling machine plays a central role in the competition of modern enterprises. The positioning error can be divided into three types: reverse gap error, pitch error and repeated positioning accuracy. This paper applies XL-30 laser interferometer to measuring the positioning errors of MVC850B NC milling machine. Origin software is used to deal with measurement data and analyze the law of errors generation. Based on the analysis of the three kinds of errors, the main influencing factors are obtained. The backlash error is mainly caused by the clearance of the screw nut; the pitch error is mainly caused by the accumulation of the screw pitch error and the straightness error of the guide rail; the repeat positioning accuracy is mainly related to the vibration of the machine tool. This analysis provides the basis for reducing the positioning error.更多还原