To reduce wear on your CNC lathe tools and ensure proper operation, here are some suggestions:

1. Select appropriate tool materials: Different workpiece materials and processing needs require the use of appropriate tool materials. Choosing tool materials with wear resistance and high hardness can extend the service life of the tool.
2. Correct cutting parameters: Set cutting parameters reasonably, including cutting speed, feed speed and cutting depth, etc., to avoid damage to the tool due to excessive temperature and cutting force.
3. Use cooling lubricant: Using an appropriate amount of cooling lubricant during the cutting process can lower the temperature, reduce friction and wear, and at the same time provide chip flushing and lubrication.
4. Regular tool inspection and maintenance: Check the wear of the tools frequently, and clean and maintain the tools regularly. Replace severely worn tools promptly to maintain processing quality.
5. Reasonable tool path planning: Through reasonable tool path planning, reducing the number of cutting times and the reciprocating stroke of the tool can reduce tool wear.

In terms of daily repairs, the following are some commonly used repair methods:

1. Tool grinding: When the tool wear is minor, you can use a grinding wheel or other abrasive tools for minor repairs. Make sure the grinding angle, surface and cutting edge geometry meet requirements.
2. Tool coating repair: Some tools have coatings. When the coating is worn, the coating repair method can be used to restore the performance of the tool.
3. Tool removal and replacement: Tools that are severely worn or damaged need to be removed and replaced. Inspect tools regularly and update tool inventory as needed.

Please note that repair and maintenance of knives should be performed by experienced professionals. They have the expertise and skills to properly assess the condition of the knife and take appropriate repair measures. Also, follow safe operating procedures to ensure the lathe and operating environment are safe before repairing the tool.