Increasing the service life of CNC machine tools requires comprehensive consideration of multiple aspects, including daily maintenance of machine tools, rational use and operation, and technological updates. Here are some methods and suggestions:

1. Regular maintenance: Regular maintenance of CNC machine tools is the key to ensuring their normal operation and extending their service life. This includes cleaning the surface and interior of the machine tool, lubricating various components, checking the electrical system and hydraulic system, etc.

2. Keep the environment stable: Maintain the stability of the environment around the machine tool, including temperature, humidity, dust and other factors. Try to avoid exposing the machine tool to moisture, high temperature or dusty environment for a long time.

3. Reasonable use and operation: CNC machine tool operators should use and operate CNC machine tools correctly in accordance with the requirements of the operation manual, and avoid improper behaviors such as overload operation, frequent starts and stops, and excessive processing.

4. Regular inspection and adjustment: Regularly carry out comprehensive inspection and adjustment of CNC machine tools, including looseness, wear and tear, accuracy, etc. of various components, so as to discover and solve problems in a timely manner.

5. Regularly replace wearing parts: CNC machine tools regularly replace wearing parts, such as bearings, guide rails, screws, cutting tools, etc., based on usage and maintenance records to ensure the accuracy and stability of the machine tool.

6. Technology updates and upgrades: Regularly update and upgrade CNC machine tool CNC systems and software to obtain better performance, functionality and security. At the same time, consider updating and upgrading additional equipment and accessories for machine tools to meet new processing needs.

7. Training operators: Regularly conduct training and technical upgrades for CNC machine tool operators so that they can understand the latest operating technology and maintenance methods, and improve the operation level of CNC machine tools and the normal utilization rate of machine tools.

8. Regular insurance and maintenance contracts: Consider purchasing insurance and maintenance contracts for machine tools to ensure that you can receive timely professional technical support and services when the machine tool breaks down or needs repair.

Taking the above factors into consideration, the service life of CNC machine tools can be effectively extended and the efficiency and performance of CNC machine tools can be improved.