Excessive temperature of CNC lathe may be caused by many reasons, including the following:

1. Excessive cutting heat: The cutting heat of CNC lathes is one of the main factors that causes the temperature of CNC lathes to rise. When the cutting speed, feed rate or cutting depth of the CNC lathe is too high, the friction between the tool and the workpiece will cause a large amount of heat, which will increase the temperature of the CNC lathe.

2. Poor lubrication: CNC lathes need to use lubricating oil or coolant during processing to reduce friction, cool the tool and workpiece, and reduce cutting heat. If the CNC lathe lubricant or coolant is insufficient or of poor quality, it will cause increased friction, which will increase the temperature.

3. Machine tool structural problems: Poor structural design of the CNC lathe itself or wear caused by long use may increase the internal friction of the CNC lathe, causing the temperature to rise.

4. The ambient temperature is too high: If the working environment temperature of the CNC lathe is too high, it will lead to poor heat dissipation of the machine tool, thereby increasing the temperature of the machine tool.

5. Processing material issues: Some special materials in CNC lathes, such as high-temperature alloys, titanium alloys, etc., will generate a lot of heat during the processing process, causing the temperature of the CNC lathe to rise.

In order to avoid excessive temperature of the CNC lathe, the following measures can be taken:

1. Set the CNC lathe cutting parameters reasonably to avoid excessive cutting heat;

2. Use high-quality lubricating oil or coolant for CNC lathes, and ensure that the lubrication system is working properly;

3. Regularly inspect and maintain CNC lathes to ensure that the machine tool structure is intact;

4. Maintain a good working environment for CNC lathes and control the temperature of the working environment;

5. Select the appropriate cutting process and tools according to the characteristics of the material processed by the CNC lathe.