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The most common auxiliary gas for laser cutting
 
Acme Laser time of publication 2022-08-31 10:48

With the increasing power requirements of laser processing, how to improve efficiency and reduce costs is a concern in this industry. Because the fiber laser cutting machine has fast cutting speed, is not easy to cause material deformation, and has high processing accuracy, it has gradually become one of the most needed equipment in the market. Therefore, the application of high-power lasers will greatly improve the efficiency of laser processing. The limit cutting speed when processing thin plates can be controlled, and the cutting technology of medium and thick plates is also constantly improving.

As we all know, the commonly used auxiliary gases for fiber laser cutting machines when cutting sheets and pipes are oxygen, nitrogen and air. However, due to the relatively high cost of nitrogen and oxygen, the cost of air is low. To reduce production costs, air is the preferred auxiliary gas.

Carbon steel cutting generally uses oxygen cutting. Oxygen reacts with the processing material, and a large amount of heat is generated during the cutting process, thereby forming a cut in the processing material, and the generated air pressure will also blow the oxide and slag out of the reaction zone.

Stainless steel and aluminum plates are generally cut with nitrogen gas, and carbon steel plates with relatively large thickness can also be cut. The energy of the laser melts the metal, and the high pressure blows the melt away. A relatively bright section effect can be obtained on aluminum plate and stainless steel cutting.

Air is generally used in more metal materials, but it must be filtered, cooled, dried, etc. with an air compressor to remove water and oil in the air, and then it can be used in cutting. And the air contains 20% oxygen, which can make up for the lack of oxygen and nitrogen in the cutting process.

When the processing requirements are lower, air cutting has a greater cost advantage. However, it should be noted that when using air, it must be ensured that the air is processed by the air compressor and the refrigerating machine. Otherwise, there will be water and oil in the laser cutting machine during the cutting process, which will cause fogging of the protective lens and affect the cutting quality. The protective lens needs to be replaced in time, otherwise it may cause damage to the internal components of the laser head.

For mass processing, air can be used as the first auxiliary gas for laser cutting machines, which can bring high cutting efficiency and reduce operating costs. But if it is small batch processing, air cutting may not be able to reduce the cost. Therefore, it is necessary to decide whether to use air cutting according to the actual situation.