The relationship between fiber laser cutting machine and three auxiliary gases

The relationship between fiber laser cutting machine and three auxiliary gases
With the increasingly fierce competition in the laser processing industry, improving efficiency and reducing costs have become a concern of most users. The application of high-power laser has greatly improved the efficiency of laser processing. The ultimate cutting speed of thin plates has been able to challenge the control limit of mechanical properties. The cutting process of medium and heavy plates is also constantly breaking through. Air cutting greatly reduces the cost of laser processing.
The cutting auxiliary gas commonly used in fiber laser cutting machines is oxygen, nitrogen and air. However, since the cost of nitrogen and oxygen is higher than that of compressed air, and the price of nitrogen and oxygen rises year by year, the use of air as a cutting assist gas can greatly reduce the cost of production.
Oxygen is mainly used for carbon steel cutting. The principle is that oxygen reacts with metal to release a large amount of oxidation heat. At the same time, a certain pressure will blow out oxides and slag from the reaction zone to form a slit in the metal. Since the oxidation reaction during the cutting process generates a large amount of heat, it does not require too much power, but the cut corners are prone to overheating.
Nitrogen is mainly used for cutting stainless steel and aluminum plates, and it can also cut carbon steel plates of a certain thickness. The higher the power, the greater the thickness of the carbon steel that can be cut. Nitrogen cutting relies on the energy of the laser to melt the metal, blowing away the melt at high pressure and ensuring that
unreasonable chemical reactions are avoided during the period. In the stainless steel and aluminum plate cutting, a relatively bright cross-section effect can be obtained, and the sharp corner effect is also better.
The air itself is present in the atmosphere, compressed into a gas storage tank by an air compressor, and then filtered, cooled and dried to remove water and oil from the air. The principle of air cutting is similar to that of nitrogen, but because the air contains about 20% oxygen, it can compensate for the deficiency of oxygen and nitrogen to some extent.