How to choose the nozzle of fiber laser cutter-Ariel

How to choose the nozzle of fiber laser cutter

Nozzles are very common wear parts on laser cutting machines, and they are also important parts for laser cutting. It is located at the bottom of the laser head, very close to the workpiece. The focused laser and high-pressure airflow are emitted through the nozzle, so it plays a very important role in the cutting process.The nozzle of the laser cutting machine can assist the rapid ejection of gas, which can effectively prevent debris and other debris from rebounding upward, thereby protecting the focusing lens.And it can control the area and size of gas diffusion, which will affect the cutting of the laser cutting machine quality. How to choose the nozzle of fiber laser cutter?

1. Nozzle size:

Select the nozzle size according to the thickness of the metal sheet cut by the user. The aperture of the nozzle controls the gas flow and the shape of the gas field, which is very important for the cutting quality. Generally, when a laser cutting machine  apply to cut a thin plate of less than 3mm, we recommend to use a nozzle with a diameter of 1mm, and a thickness of more than 3mm we recommend to select a nozzle with a diameter of 1.5mm. For cutting metal plates of more than 10mm, generally select the  nozzle with a diameter of 2mm or more is .

2. Nozzle material:

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

3. Nozzle processing accuracy:

A good laser head nozzle should have a concentricity of 0.03mm, and a nozzle with a size below 1.0mm should have a concentricity of 0.02mm.High-precision concentric nozzles can not only reduce the early debugging during processing, but also effectively prevent high-energy lasers from hitting the inner wall of the laser head, thereby avoiding damage to the laser head.

4. Smoothness and anti-oxidation treatment of the nozzle surface:

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

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Ariel Liu

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