Research on influence mechanism of thermal error of ultra-precision diamond fly-cutting machine tool

During the process of ultra-precision diamond fly-cutting machine tool, due to internal heat sources, the thermal deformation of various parts of the machine tool has severely restricted the accuracy of the machine tool. Therefore, in order to improve the accuracy of the machine, it is necessary to study the mechanism of ultra-precision diamond fly-cutting machine tool. First, an intelligent monitoring system is arranged for the fly-cutting machine tool to collect temperature signals. Then the heat generations at the spindle motor and linear motor are calculated, and the thermal boundary conditions of the machine tool are analyzed. Finally, the finite element model of the flying-cutting machine tool was established, and the thermal-structural coupling analysis and calculation were carried out. The results show that: under the action of the internal heat source, the maximum deformation of the machine tool in the cutting direction is 6.8 mu m, which occurs at the spindle motor. The maximum deformation of the tool tip is 1.02 mu m in the cutting direction. Eventually, the machine thermal error under the tool tip and the work bench is 1.42 mu m. This research provides a basis for the research of machine tool thermal compensation and the improvement of the accuracy of machine tool.