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 tracking of the laser head to the workpiece during the cutting process of the laser pipe cutting machine, and guide the gas to pass through the cut workpiece smoothly. , and form a high pressure near the nozzle outlet to speed up the cutting speed, take away the slag, and protect the internal lens of the laser head.
Type of nozzle
Generally, laser cutting nozzles are divided into single and double layers. Single-layer nozzles are used for melting cutting, that is, nitrogen is used as auxiliary gas, and are usually used for cutting stainless steel, aluminum alloy, brass, etc.; double-layer nozzles are generally used for oxidation cutting. That is, oxygen is used as an auxiliary gas, and it is usually used to cut 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, thereby affecting the removal of the melt and the stability of the 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 the jet to remove the melt.
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 greater the pressure of the proportional valve setting, the greater the flow rate, and only by ensuring the pressure can the normal section effect be cut.
Different power nozzle selection
Laser power≤6000W
For cutting carbon steel, the diameter of the nozzle specification is generally double-layer S1.0~5.0E;
For cutting stainless steel, use ordinary WPCT single-layer nozzles;
Laser power ≥ 6000W
Cutting carbon steel, 10~25mm carbon steel bright surface cutting, the diameter of the selected cutting nozzle is generally double-layer high-speed E-type S1.2~1.8E; the diameter of single-layer fan type is generally D1.2~1.8;
For cutting stainless steel, use ordinary WPCT single-layer nozzles.
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