Talking about the functions and selection methods of laser cutting machine nozzles

Talking about the functions and selection methods of laser cutting machine nozzles
 

Nozzles are very common consumables on laser cutting machines, and they are also very important parts during laser cutting. It is located at the bottom of the laser head, very close to the workpiece, and the focused laser and high-pressure air flow are emitted through the nozzle, so it plays a very critical role in the cutting process.

The nozzle of the laser cutting machine can assist the gas to be ejected quickly, which can effectively prevent the melting stains and other debris from rebounding, thereby protecting the focusing lens, and at the same time it can control the gas diffusion area and size, which will affect the cutting of the laser cutting machine quality.

How to choose the nozzle of the laser cutting machine?

laser cutter
1. Nozzle size: According to the thickness of the metal sheet cut by the user, the nozzle size is selected. The aperture of the nozzle controls the flow of gas and the shape of the gas field, which is very important for cutting quality. Generally, when using a laser cutting machine to cut thin plates below 3mm, it is recommended to choose a nozzle with a diameter of 1mm, and a nozzle with a diameter of 1.5mm is recommended for a thickness of 3mm or more. For cutting metal sheets above 10mm, nozzles with a diameter of 2mm or more are generally selected.

2. Nozzle material: good nozzle, the material must have high conductivity and good thermal conductivity. Generally, a copper nozzle is better than a brass nozzle, which can ensure a good capacitance signal.

3. The processing accuracy of the nozzle: a good laser head nozzle must have a concentricity of 0.03mm, and a nozzle with a size below 1.0mm must have a concentricity of 0.02mm. The high-precision concentric nozzle can not only reduce the pre-debugging in the processing process, but also effectively prevent the high-energy laser from hitting the inner wall of the laser head, thereby avoiding damage to the laser head.

4. The surface finish and anti-oxidation treatment of the nozzle: The smooth surface and good anti-oxidation treatment can effectively reduce the adhesion of melt during the cutting process and extend the service life of the nozzle.