Why Do Protective Lenses Frequently Burn During Laser Cutting And How Can This Issue Be Resolved?

Frequent burning of protective lenses during laser cutting machine has become a common issue for many manufacturers using laser cutting machines. This problem can be caused by various factors, such as dust and small white spots on the lens, black spots from blasting and slag return during perforation, and gas delay time being too short.

One common cause of dust and small white spots on the lens is air pollution, dust, oil, or water in the air compressor gas. To solve this issue, it is essential to clean the air intake pipe of the laser head using high-purity alcohol, flush the atmospheric pressure from the air intake of the machine tool, clean the pipe multiple times, and regularly replace the filter element of the air compressor.

Black spots on the lens can be caused by blasting and slag return during perforation. To prevent this, it is recommended to reduce the duty cycle and frequency, and increase the perforation time appropriately. This will help minimize the occurrence of black spots on the protective lens.

Another common issue is the gas delay time being too short. To address this problem, it is important to adjust the gas exchange delay to between 200-500, or check the option of not closing the gas. This adjustment will help ensure that the protective lens is not burned due to a short gas delay time.

Additionally, it is important to remember to do a good job of dust prevention when replacing the lens. The size of the laser power also plays a role in the service life of the protective lens, with higher power lasers being more prone to burning the lens. It is essential to consider the laser power and adjust the settings accordingly to prevent frequent burning of the protective lens.

In conclusion, by addressing the various factors that can cause the protective lens to burn during laser cutting, manufacturers can prolong the life of the lens and improve the efficiency of their laser cutting machines. Regular maintenance, proper cleaning, and adjusting the machine settings can all help prevent the frequent burning of protective lenses during laser cutting processes.