Laser cutting head as a key component of laser cutting machine, its replacement time is not fixed, usually based on the following conditions to determine whether it needs to be replaced:

1. Use time and performance decline: the service life of the laser cutting head is related to the frequency of use and the type of cutting material. For example, according to the data, the life of the focusing lens is about 2400 hours, and it is replaced about every 3-6 months; The protective lens may be replaced every 7 days or so, as it directly blocks debris from the cutting process.

2. Cutting quality decline: If it is found that the cutting edge begins to become rough, burr, or the cutting speed is significantly reduced, this may be a sign of the performance of the cutting head decline, need to check and consider replacing.

3. Regular inspection and maintenance found damage: in the regular maintenance inspection, if the cutting head is found to have physical damage, lens pollution or abnormal focusing function, even if it is not to the scheduled replacement cycle should be replaced in time.

4. Equipment alarm: When the control system of the laser cutting machine sends an alarm related to the cutting head, it indicates that there may be a fault or performance problem, and it is necessary to evaluate whether the cutting head needs to be replaced.

5. Manufacturer recommendation: different brands and models of laser cutting machines, their manufacturers usually give the recommended replacement cycle of specific parts, follow the manufacturer's guidelines for replacement is the most direct method.