Methods to prevent vertical CNC lathes from deforming due to thermal characteristics mainly include the following aspects:

1. Optimize structural design: CNC lathes try to reduce the generation and transmission of thermal stress by optimizing the structural design of the lathe, and adopt reasonable materials and structural layout to improve the stability and rigidity of the lathe and reduce the possibility of deformation.

2. Reasonable cooling system: CNC lathes are equipped with an effective cooling system to cool key parts such as spindles and guide rails to control temperature changes and reduce the accumulation and impact of thermal stress.

3. Regular inspection and maintenance: Regularly inspect various components and lubrication systems of CNC lathes to ensure their normal operation, and promptly discover and deal with problems that may cause deformation, such as wear, looseness, etc.

4. Temperature control: Deploy temperature control equipment in the CNC lathe workshop to try to maintain a constant temperature environment to avoid the impact of temperature changes on the lathe, especially in precision machining.

5. Preheating treatment: Before CNC lathe work, the lathe should be properly preheated to raise its temperature to a stable state to reduce the impact of temperature changes on the lathe.

6. Limit processing parameters: In high-temperature environments or temperature-sensitive processing tasks, CNC lathes limit processing parameters, such as reducing cutting speed, reducing cutting depth, etc., to reduce heat accumulation and the possibility of thermal deformation.

7. Use temperature compensation technology: For high-precision machining tasks, CNC lathes can use temperature compensation technology to monitor the temperature changes of the lathe in real time through sensors, and automatically adjust the processing parameters according to the changes to maintain stable processing accuracy.

In summary, through reasonable design, regular maintenance, temperature control and the use of advanced temperature compensation technology, the loss of processing accuracy caused by the deformation of thermal characteristics of vertical CNC lathes can be effectively reduced.