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The auxiliary gas for the laser cutting machine is mainly used in:
First, the laser gas (laser generator used to generate laser gas)
Second, compressed air (usually used to protect the optical path, and some manufacturers also used as protective gas)
Third, the auxiliary gas (that is, the gas emitted from the cutting nozzle)
Laser cutting machines use different auxiliary gases for cutting different materials. The difference in the thickness of the cutting material, the auxiliary gas pressure and the required flow rate are not the same.
Cut oxygen for carbon steel, the purity requirement is generally 99.5% or higher. The main role is to help and blow off the cut melt. The pressure and flow of laser cutting machine manufacturers vary, this is with the cutting nozzle model size, cutting material thickness is inseparable. General requirements for pressure in the 0.3-0.8Mpa, cutting mouth generally 0.02-0.05Mpa. The flow rate is not good, such as cutting 22mm carbon steel, some manufacturers' flow rate should reach 10M3/h (including protection oxygen for double layer nozzle)
Cut stainless steel to use nitrogen. The role is to prevent oxidation and blow off the melt. There are high requirements on the purity of nitrogen (especially stainless steel with 8mm or more, and the required purity is 99.999% in general). Pressure requirements are relatively large, and generally require more than 1Mpa. If you want to cut 12mm or more, or to 25mm thick stainless steel, require pressure. Higher, above 2Mpa or higher. The flow rate varies according to the model of the cutting nozzle, but it is very large. For example, cutting some 12mm stainless steel requires that some manufacturers have 150m3/h and cut 3mm, as long as the flow rate is less than 50m3/h.
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Editor: zgqgjjywzhd