It is well known that the auxiliary gas must be used in the laser cutting machine to process metal. The relatively widely used gases in the auxiliary gas are nitrogen, oxygen and air, and air is an economical gas. Only one air compressor is needed to continuously input air.

The principle of air cutting by laser cutting machine:

When the laser cutting machine is processing, it is necessary to use protective gas. The air is of course a simple and economical protective gas. The role of the air compressor is to provide cutting gas composed of compressed air, high-purity oxygen and high-purity nitrogen to the cutting head, part of which is used as the power gas source to supply to the cylinder of the clamping table, and part of which is used to purge and dust the optical path system, After the compressed air discharged from the air enters the gas control cabinet through the gas storage tank and dryer, it passes through a set of precision processing system and becomes clean and dry gas, which is finally divided into three channels, which are respectively used as cutting gas, cylinder power gas source and optical path positive pressure dedusting gas to maintain the normal operation of the laser cutting machine. Therefore, the air compressor is essential for each laser cutting equipment and is also very important for the laser cutting machine.

Effect analysis of laser cutting machine using different gas cutting:

1. Air; It can be supplied directly by the air compressor, so it is very cheap compared with other gases. Although the air contains about 20% oxygen, the cutting efficiency is far less than that of oxygen, and the cutting ability is similar to that of nitrogen. There will be a small amount of oxide film on the cutting surface, but it can be used as a measure to prevent the coating layer from falling off. The cut end face turns yellow.

The main applicable materials are aluminum, aluminum alloy, stainless copper, brass, galvanized steel plate, non-metallic and so on.

2. Nitrogen; When some metals are cut, oxygen will form an oxide film on the cutting surface, and nitrogen can be used to prevent non-oxidation cutting of the oxide film. The non-oxidation cutting mask has the characteristics of direct welding and coating, and strong corrosion resistance. The end face of the cut is white.

The main applicable plates are stainless steel, galvanized steel plate, brass, aluminum, aluminum alloy, etc.

3. Oxygen; It is mainly used for cutting carbon steel by laser cutting machine. While using oxygen reaction heat to improve cutting efficiency in large format, the oxide film produced will improve the beam spectral absorption factor of the reflective material. The end face of the cut is black or dark yellow.

It is mainly applicable to rolled steel, rolled steel for welding structure, carbon steel for mechanical structure, high tension plate, tool plate, stainless steel, galvanized steel plate, copper, copper alloy, etc.

The laser cutting machine uses air cutting, and the air compressor is a very important auxiliary equipment. Of course, although it is cost-free to use air cutting, attention should be paid to the maintenance of the air compressor, which directly affects the purity and air pressure of the air, and also affects the overall cutting quality. Now let's share the maintenance steps of the air compressor:

1. Air filter element. Generally, the dust and impurities on the surface of the air filter element should be removed every 500 hours, and the need for replacement should be checked every 2000 hours. The inspection or replacement cycle can be extended or shortened according to the dust content.

2. Intake valve seal. Check the condition of the sealing ring when the air compressor of the laser cutting machine works every 4000 hours, and replace it if necessary.

3. Compressor lubricating oil. Check whether the lubricating oil is sufficient every 1000 hours and replace it every 4000 hours.

4. Oil filter. Replace new parts every 2000 hours.

5. Oil vapor separator. A new part needs to be replaced every 4000 hours.

6. Pressure valve. Clean every 4000 hours and check whether the opening pressure is normal.

7. Safety valve. Check whether its action is sensitive every 4000 hours.

8. Drain valve. Drain water and dirt every 2000 hours.

9. Drive belt. Adjust the tightness every 2000 hours, check the wear condition every 4000 hours, and decide whether to replace it according to the wear condition.

10. Motor maintenance. Carry out maintenance according to the motor operation instructions.

In order to ensure the normal and reliable operation of the air compressor of the laser cutting machine and ensure the service life of the unit, it is necessary to formulate a detailed maintenance plan, carry out regular operation, regular maintenance and regular inspection and maintenance, so as to keep the air compressor unit clean, free of oil and dirt.