Analysis and experiment on thermal sensitive characteristic of electric spindle of CNC machine tool

作者：Shi Hu; Mei Xuesong^*; Yang Jun; Tao Tao

来源：Journal of Huazhong University of Science and Technology (Natural Science Edition), 2012, 40(SUPPL.2): 26-30.

• Computerized numerical control machines
• Electric spindle
• Thermal deformation
• Thermal error
• Thermal-sensitive

The thermodynamic model for the electric spindle system of CNC machine tool was established. The heat sources distribution and the thermal properties of the spindle system were analyzed based on thermodynamics theory. According to cross-correlation and mutual information theory, the thermal characteristics of the spindle system using the data extracted from the thermodynamics field were discussed and the relationship between the temperature field and the thermal deformation field was revealed, putting forward the drift characteristics of the temperature sensitive field of spindle system. The thermal error prediction model was built up to obtain the thermal deformation in axial and radial directions by choosing several points from the temperature sensitive field. Experiments were carried out on the YK73200 CNC gear grinding machine. The temperature sensitive field and the corresponding drift characteristics of spindle system were investigated by comparing the predicted value with the measured value of thermally induced deformation. The results provide a theoretical and experimental support for thermal error compensation of CNC machine tool.

• 出版日期2012