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Why use compressed air for laser cutting? How to choose a special screw air compressor?

Laser cutting is the use of high-power density laser beams to irradiate the material to be cut, so that the material is quickly heated to the vaporization temperature, and holes are formed after evaporation. As the beam moves to the material, the holes continuously form a narrow width (such as about 0.1mm). seam to complete the cutting of the material.

What can a laser cutting machine do?
Laser cutting is widely used in sheet metal processing, metal processing, advertising production, kitchen utensils, automobiles, lamps, saw blades, elevators, metal crafts, textile machinery, grain machinery, glasses production, aerospace, medical equipment, instrumentation and other industries. At present, laser cutting machines mainly include melting cutting, vaporization cutting, oxygen cutting, scribing and controlled fracture cutting.

Auxiliary air source for laser machine, OSG screw air compressor, air tank, OSG air dryer and filter.
Laser cutting machines can meet the cutting requirements of various materials and complex shapes. In addition to providing high-energy lasers, auxiliary gas is indispensable in the cutting process. Its role is to support combustion and heat dissipation; , to prevent dust from clogging the laser nozzle, and the third is to protect the focusing lens and prolong its service life.

The auxiliary gases used for laser cutting mainly include:

Oxygen (O2): strong oxidizing properties of high-purity oxygen, the cutting surface is prone to blackening, which affects subsequent processing;

Nitrogen (N2): general processing of precious metals or very high processing accuracy, the cost is higher than oxygen cutting;

Compressed Air: Wide range of processing, high precision, stable gas consumption, air contains about 20% oxygen, so it can make up for the lack of oxygen and nitrogen to a certain extent.

cost analysis
At present, the 99.99% liquid nitrogen on the market is about 900~1000 yuan/ton, the cost of nitrogen per Nm3 is 1 yuan/Nm3, and the liquid oxygen is about 3 yuan/kg. Therefore, if the cutting industry is conventional carbon steel cutting, use compression Air is a more economical and applicable method. For precious metal cutting or high-precision cutting, it is more convenient and applicable to use a nitrogen generator to generate nitrogen on site.

For example: OSG 15.5bar screw air compressor is used to provide 15.5bar compressed air, which can provide 1.5m3 per minute, and the full-load input power of this type of air compressor is 13.4kW.

The industrial electricity cost is calculated at 0.2 USD/kWh, and the air cost per m3 is: 13.4×0.2/(1.5×60)=0.3 USD/m3, based on the actual consumption of 0.5m3 gas per minute, and the laser cutting machine works 8 hours a day. Then the daily cost saved by air cutting is: 29.4 US dollars. If the laser cutting machine works 300 days a year, the annual gas cost that can be saved is: 29.4×300=8820 US dollars.

OSG skid-mounted laser cutting air compressor, integrated innovative design, ready to install and use, integrated air compressor, cold dryer, filter air storage tank, suction dryer, built-in drainage filter, to ensure that the compressed air reaches high High quality, wider application range, stable air supply pressure, saving installation space, ready to buy and use immediately. Adopt Baldor cloud intelligent operating system, with user-friendly functions such as use reminder, overpressure and high temperature alarm, compressed air quality warning, etc.

Treated compressed air:
Pressure dew point: -20~-30°C;
Oil content: no more than 0.001ppM;
Particle filter accuracy: 0.01um.


Post time: Aug-15-2023