What is the reason for laser cutting encountering nozzle overheating

When operating a fiber laser cutting machine, people often wonder why the cross-section is smooth at the beginning of cutting, but over time, the cross-section effect becomes worse. Why is this?

Long term cutting can easily cause overheating of the cutting nozzle, resulting in abnormal capacitance values and nozzle deformation, leading to unstable cutting, such as good cutting at the beginning but incomplete cutting later, different left and right cross-sections, etc.

What is the reason for laser cutting encountering nozzle overheating? Firstly, we need to know why the nozzle heats up. There are generally three reasons for nozzle overheating.

1.The laser is not output at the center of the nozzle

The deviation of the light beam during the cutting process

Need to switch back to coaxial

2.Replace the lens

During the cutting process, the lens becomes contaminated and accumulates heat, which is then transferred to the nozzle

Causing the nozzle to heat up and become hot

3.Improper installation of nozzle

Before installation, check that the nozzle is not deformed or damaged

Tighten the nozzle to prevent tilting

In short, nozzle heating is a common problem in laser cutting machines that needs to be detected and resolved in a timely manner. Junyi Laser has been deeply involved in the laser industry for many years. If you have any questions or concerns, please feel free to leave us a message in the background.