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The thermal characteristics of CNC machine tools have an important impact on the machining accuracy of CNC machine tools, accounting for almost half of the machining accuracy; the guide screws and other components used in the XYZ motion axes of the machine tool spindle will heat and deform due to load and friction during the movement process, but the thermal deformation error chain What ultimately affects the machining accuracy is the displacement of the spindle and the XYZ motion axis components relative to the worktable. The machining accuracy of the machine tool in the long-term shutdown state and the thermal equilibrium state is quite different; the reason is that the temperature of the CNC machine tool spindle and each moving axis is relatively maintained at a fixed level after the running period. With the change of processing, the thermal accuracy of CNC machine tools tends to be stable, which shows that it is very necessary to preheat the spindle and moving parts before processing.

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