Thermal Error Analysis of Spindle Based on Temperature-Deformation Model

In order to improve the precision and maintain the precision’s stability of the motorized spindle, it’s of great significance to research the production regularity of thermal error of the motorized spindle. Therefore, the thermal behaviour of spindle were studied by thermal-structural coupled numerical simulation in this paper. Based on the thermoelasticity, the relative thermal displacement model of the inner and outer ring’s radial direction for angular contact ball bearing can be built. And then the total radial displacement of spindle were studied. In order to verify the effectiveness of the proposed methods, the experiment was carried out. The contrastive analysis between the analysis results and test results of motorized spindle error is made. The analysis results show that this method has good accuracy in predicting the temperature and thermal error of motorized spindle.