The diameter of the nozzle determines the shape of the gas flow, gas diffusion area, and gas flow rate into the incision, which is very important for the cutting quality. When metal cutting, how to choose the nozzle of fiber laser cutting machine to get higher cutting quality?

 

The user selects the nozzle size according to the thickness of the cut metal sheet.

 

Generally, when a laser cutting machine is apply to cut a thin plate of less than 3mm, it is recommend to use a nozzle with a diameter of 1.5mm, and a thickness of more than 3mm is recommend to select a nozzle with a diameter of 2mm. For cutting metal plates of more than 10mm, generally select the  nozzle with a diameter of 3mm or more is.

In theory, the thicker the plate, the larger the nozzle should be used, the greater the setting pressure of the proportional valve, the greater the flow rate, and ensure the pressure to cut the normal section effect.

 

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.

 

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 when cutting different metal materials, it is very important to choose the right nozzle.