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Product Description DuriAuxiliary gas for Fiber Laser Cutting, did you get the right one? The schematic diagram of laser

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Basic Info.

Model NO.	DBZY-15A
Structure Type	Closed Type
Installation Type	Stationary Type
Type	Single Screw Compressor
Weight	560kg
Air Tank	500L
Oil Content	Less Than 3ppm
Working Pressure	7~16bar /102~232psi
Noise	65dB
Control Type	Micro PLC Controller
OEM	Acceptable
Inverter	Siemens/ABB/Inovance/Delta
Motor	Siemens/ABB
Protection Class	IP54/IP55/IP65
Insulation Class	F
Free Air Deliver	37~60cfm / 1.05~1.7m3/Min
Air End	Ghh/Rotorcomp/Hanbell
Certificate	CE/ISO/TUV/SGS
Transport Package	Plywood Case
Specification	18827901731 mm
Trademark	DHH
Origin	Shanghai, China
HS Code	8414809090
Production Capacity	600units/Month

Product Description

Product Description
DuriAuxiliary gas for Fiber Laser Cutting, did you get the right one?
The schematic diagram of laser cutting is shown in the following.During the process, auxiliary gas is necessary to blow off the slag/dross in the kerf and cool down the cutting surface, also it protects lens and nozzle of laser. Basically there are 3 kinds of gas: Oxygen, Nitrogen and Air, any of them affects directly to the cutting performance, speed, thickness etc. So we really need to think better before action.1.OxygenOxygen is commonly used to cut thick carbon steel because the chemical reaction between iron element and oxygen helps the metal absorb heat and promotes it melt, which can greatly improve the cutting efficiency.However, oxygen will cause a marked oxide film on the cut surface and it will have a quenching effect around, increases the hardness which impact on subsequent processing. It also turns kerf to black or dark yellow.Generally, Oxygen assists carbon steel plates cut, low-pressure punching, and low-pressure cutting. Oxygen is generally vaporized from liquid oxygen which provided by the local supplier, so the quality of the gas source is clean and no need special treatment.2. NitrogenNitrogen will form around the molten metal as protective atmosphere while it's assisting the cut, prevent oxidation of the material, avoid the formation of oxide film. However, the cutting speed is not as fast as oxygen, and the nitrogen consumption of the nitrogen is large which means the cost will be higher.The non-oxidized surface has the characteristics of direct welding, strong corrosion resistance and the kerf turns white.Generally, nitrogen is used to cut stainless steel, galvanized sheet, aluminum, aluminum alloy, brass and other materials, by low-pressure perforation and high-pressure cutting. When cutting with nitrogen, the change of the gas flow has a great impact on the cutting performance, in this case, make sure the gas flow is sufficient and constant. Nitrogen is usually vaporized from liquid nitrogen provided by supplier, so the quality should be clean.3. AirAir, as it's the most economic medium because it's much easier to obtain than oxygen and nitrogen, nobody can charge you for air!Every one knows the air contains about 20% oxygen and about 78% nitrogen, so it can make up for both shortage and cutting speed is slower than oxygen but faster than nitrogen. Since the oxygen is involved, the kerf turns a little bit yellow. It's the most economic option for you as long as you are okay with the color change.Generally compressed air can be used for cutting sheet-metal parts, aluminum sheet, nonmetal and galvanized sheet etc., air assist can certainly reduce the oxide film and absolutely save your cost, therefore, air assist is more and more equipped in fiber laser cut industry.Compressed air can be obtained easily with an air compressor, but not any air compressor can be equipped for Fiber Laser Cutter as the Air itself is not clean, especially after compressing, there are plenty of water, oil and particles and any of them sprayed on the lens, the transmission of laser beam will be seriously affected and focus scattered, resulting bad cutting effect such as bottom burrs or rough kerf, even obsolescence.