What is the function of the nozzle of the laser cutting head

What is the function of the nozzle of the laser cutting head

In the field of laser cutting industry, the laser cutting machine is the main equipment, and the cutting process is carried out by emitting a laser beam. In this process, the nozzle is a component that cannot be ignored. Although the nozzle is inconspicuous, it plays an important role. Let's solve the impact of the nozzle on laser cutting.

laser cutting nozzle

First, the role of the nozzle

Prevent debris such as molten stains from bouncing up, passing through the nozzle, and contaminating the focusing lens;

Control the gas diffusion area and size to control the cutting quality.

2. The influence of nozzle on cutting quality

The coaxiality between the center of the nozzle outlet hole and the laser beam is one of the important factors affecting the cutting quality. The thicker the workpiece, the greater the impact.

When the nozzle is deformed or melted, it will directly affect the coaxiality. Therefore, the nozzle should be carefully stored to avoid bumps and deformation. The nozzle shape and size are manufactured with high precision, and attention should be paid to the correct method during installation.

If the cutting conditions need to be changed due to the poor condition of the nozzle, it is better to replace the nozzle with a new one.

If the nozzle is not coaxial with the laser, the cutting quality will be affected as follows.

(1) Influence on the cutting surface

When the auxiliary gas is blown out from the nozzle, the gas volume is not uniform, and there is a phenomenon that one side has molten stains and the other side does not. It has less impact on cutting thin plates below 3mm, and when cutting more than 3mm, the impact is more serious, and sometimes it cannot be cut through.

(2) Influence on sharp corners

When the workpiece has sharp or small angles, over-melting is easy to occur, and thick plates may not be cut.

(3) Influence on perforation

The perforation is unstable, the time is not easy to control, it will cause over-melting to the thick plate, and the penetration conditions are not easy to grasp. The impact on the thin plate is small.

The above is the influence of the nozzle on the quality of laser cutting. In actual processing, we should pay attention to related problems and improve the processing quality.