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How to choose nozzles for laser cutting machines with different powers?

Update:01-09-2021 15:43:37
Summary:

In the laser cutting process, the laser head nozzle col […]

In 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 tracking of the laser head to the workpiece during the cutting process of the laser pipe cutting machine, and guide the gas to smoothly pass through the workpiece to be cut , And form high pressure at the nozzle outlet attachment to speed up the cutting speed, take away the slag, and protect the inner lens of the laser head.

Nozzle type
Generally, 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 auxiliary gas, usually used for cutting stainless steel, aluminum alloy, brass, etc.; double-layer nozzles are generally used for oxidation cutting, that is, use Oxygen is used as an auxiliary gas, usually used for cutting carbon steel.

Nozzle size selection
The diameter of the nozzle determines the shape of the gas flow entering the incision, the gas diffusion area, and the gas flow rate, which affects the removal of melt and the stability of cutting.
The air flow entering 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 jetting to remove the molten material. The user selects the nozzle size according to the laser power used and the thickness of the metal sheet to be cut.
Theoretically, the thicker the plate, the larger the nozzle should be used, the larger the proportional valve setting pressure, the larger the flow, and the pressure can be ensured to cut the normal section effect.

Different power nozzle selection

Laser power≤6000w
For cutting carbon steel, the nozzle diameter is generally double-layer S1.0-5.0E;
For cutting stainless steel, use common specification WPCT single-layer nozzle;

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; the single-layer fan diameter is generally D1.2-1.8;
For cutting stainless steel, use common specification WPCT single-layer nozzle;

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