How to choose different power laser cutting machine nozzles?

07, 2020

by Oree Laser

During the laser cutting process, the laser head nozzle collects the capacitance signal and transmits it to the signal processor through the ceramic ring, so as to keep the distance of the laser head to the workpiece during the cutting process of the laser tube cutting machine, and guide the gas to pass the workpiece to be cut smoothly , And form a high pressure at the nozzle outlet attachment, speed up the cutting speed, take away the slag, and protect the lens inside the laser head.

1. Types of nozzles

 General laser cutting nozzles are divided into single and double layers. Single layer nozzles are used for melting and cutting, that is, nitrogen is used as an auxiliary gas, and it is usually used to cut stainless steel, aluminum alloy, brass, etc.; Double-layer nozzles are generally used for oxidative cutting, that is, using oxygen as an auxiliary gas, usually used for cutting carbon steel.


2. Nozzle size selection

The diameter of the nozzle determines the shape of the gas flow, gas diffusion area, and gas flow rate into the incision, which affects the removal of the melt and the stability of the cutting.


The air flow into the incision is large, the speed is fast, and the position of the workpiece in the air flow is appropriate. The stronger the ability of spray to remove the melt. The user selects the nozzle size according to the laser power used and the thickness of the cut metal sheet.


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.

3. Choice of different power nozzles

(1) Laser power≤6000w

Cutting carbon steel, the nozzle diameter is generally double layer S1.0-5.0E;

Cutting stainless steel, using ordinary specifications WPCT single layer nozzle.

(2) Laser power ≥6000w

Cutting carbon steel, 10-25mm carbon steel bright surface cutting, the diameter of the cutting nozzle is generally double-layer high-speed E-type S1.2~1.8E; single-layer fan diameter is generally D1.2-1.8;

Cutting stainless steel, using ordinary specifications WPCT single layer nozzle.



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