翻译其次分析了进给系统综合定位误差的构成要素及其耦合原理提出了定位误差解耦及补偿的整体方案利用线性拟合方法从实测定位误差数据中分离出热误差和几何误差并通过SIEMENS 828D数控系统的螺距误差补偿功能补偿几何误差将几何误差由-14μm~16μm减小至-02μm~02μm验证了误差分离方法的有效性。再次研究了不同影响因素对进给系统热误差的作用规律。研究了电主轴发热对X向和Z向进给系统定位误差测量

Secondly, the constituent elements and coupling principles of the comprehensive positioning error of the feed system were analyzed, and a complete scheme for decoupling and compensating the positioning error was proposed. The thermal error and geometric error were separated from the measured positioning error data using linear fitting method, and the geometric error was compensated through the pitch error compensation function of SIEMENS 828D numerical control system, reducing the geometric error from -1.4μm~1.6μm to -0.2μm~0.2μm. The effectiveness of the error separation method was verified.

Thirdly, the effects of different influencing factors on the thermal error of the feed system were studied. The influence of electric spindle heating on the measurement of positioning error in the X and Z directions of the feed system was investigated. The effects of non-motion heating, motion heating, and comprehensive heating on the error of the feed system were revealed by experiments at different feed rates, and it was proved that the thermal error of the X-axis feed system was caused by the superposition of non-motion heating and motion heating. The effect of feed rate on the thermal error of the Z-axis feed system was obtained through experiments at different feed rates.

Finally, the modeling and compensation techniques for the thermal error of the feed system were developed. Based on the mechanism and influencing factors of the thermal error of the feed system, the temperature points for modeling were selected, and the models for the origin drift error and thermal expansion error of the X and Z axis feed systems were established using a multiple linear regression model. The thermal error compensation of the lathe feed system was realized through the compensation interface of the SIEMENS 828D numerical control system. The effectiveness of the error separation, modeling and compensation methods was verified through experiments under different working conditions, including different feed rates and idle travel. The results showed that the positioning accuracy of the X and Z axis feed systems was significantly improved, with the positioning error reduced from 30.9μm to within 3.6μm and from 50.3μm to within 3.7μm, respectively