Thermal deformation error of CNC lathe spindle is due to the dimensional changes caused by the influence of heat on the spindle during long-term operation, which in turn affects the machining accuracy. In order to improve the thermal deformation error of the CNC lathe spindle, the following measures can be taken:

1. Cooling system optimization: CNC lathes are equipped with more effective cooling systems, such as water spray cooling systems or cooling fans, and coolant circulation systems. CNC lathes can effectively reduce the temperature of the spindle and slow down the occurrence of thermal deformation.

2. Temperature control: CNC lathes install temperature sensors around the spindle to monitor the temperature changes of the spindle in real time and take corresponding control measures. CNC lathes such as automatically adjusting the cooling system, controlling the processing speed, etc., to keep the spindle temperature stable.

3. Material selection and processing: CNC lathes choose materials with low thermal expansion coefficients to make spindles, such as high-strength stainless steel or alloy steel. CNC lathes improve the material's stability and thermal deformation resistance through appropriate heat treatment processes.

4. Structural optimization: The CNC lathe design optimizes the structure of the spindle and adds heat sinks or heat dissipation channels to improve the heat dissipation effect of the spindle, reduce heat accumulation, and reduce the occurrence of thermal deformation.

5. Preheating and thermal compensation: The CNC lathe properly preheats the spindle before processing to make it reach a stable operating temperature; in addition, through thermal compensation technology, the CNC lathe can adjust the spindle according to the real-time measured temperature data during the processing. Processing parameters are automatically adjusted to compensate for errors caused by thermal deformation.

6. Regular calibration and maintenance: Calibrate and maintain the CNC lathe regularly, check the wear of the spindle, and replace worn parts in time to ensure that the spindle of the CNC lathe remains in good working condition and reduces the impact of thermal deformation.

To sum up, by optimizing the cooling system, temperature control, material selection and processing, structural optimization, preheating and thermal compensation, and regular calibration and maintenance, CNC lathes can effectively improve the thermal deformation error of the CNC lathe spindle and improve processing. Accuracy and stability.