技術摘要（英）
This patent proposes a new type of machine tool thermal deformation measurement device. At present, the thermal deformation measurement of machine tools is usually carried out on the thermal deformation measurement of the spindle and moving axes. Measuring instruments on the market generally fix the displacement sensors on the workbench to measure the deformation of the test mandrel clamping on the spindle, and measure the thermal deformation of the spindle and the thermal deformation of the moving axes respectively, The measurement time is thus extended. And it is impossible to know the total thermal deformation of the machine. This patent designs a set of measuring fixtures using 6 non-contact displacement sensors, Clamp test mandrels on the spindle and worktable respectively. To measure the thermal deformation of the spindle by the main shaft sleeve. And fix the test mandrels on the workbench to measure the thermal deformation of the moving axes by the spindle sleeve. After calculation, the thermal deformation of the spindle relative to the table and the thermal deformation of the table relative to the spindle caused by the moving axes can be obtained. Statistical methods are used to separate and analyze thermal errors, with non-linear Support Vector Regression (SVR) employed to establish error models for each axis and position. Compensation is achieved through origin coordinate offset compensation and feed axis pitch error compensation, ensuring comprehensive thermal error compensation for the entire machine. This method enhances the precision and stability of machined parts