2022-12-27

Laser cutting machine as a general processing method of modern manufacturing industry, breaking the traditional processing method, with a new cutting technology is widely used in various fields of life, especially in recent years developed into a rocket type fiber laser cutting machine.

Laser cutters then have to use auxiliary gases during the cutting process, which is also a concern for many users. Today, Lasers will discuss why laser cutters need to add auxiliary gases to the cutting process and how users can use auxiliary gases wisely.

Why to add auxiliary gas for laser cutting machine processing Before understanding how to choose the auxiliary gas of laser cutting machine, we should first understand why to use auxiliary gas and the role of auxiliary gas. After years of experience in laser cutting industry:

In addition to blowing away molten slag in the coaxial gap, the auxiliary gas cools the surface of the object being processed, reduces the heat-affected zone, cools the focusing lens, and prevents soot from entering the base of the lens and contaminating it, causing it to overheat. The selection of gas pressure and type has a great impact on the cutting process, and the selection of auxiliary gas type has a certain impact on the cutting performance, including cutting speed, cutting thickness, etc. How to Choose Auxiliary Gases for laser cutting machine Auxiliary gases used by laser cutting machine mainly include oxygen, nitrogen, air and argon. Now we introduce the use and properties of various auxiliary gases for reference.

Step 1: Air

Air can be supplied directly from an air compressor, so it is very cheap compared to other gases. Although air contains about 20% oxygen, the cutting performance is much lower than oxygen, and the cutting performance is similar to nitrogen. A small amount of oxide film appears on the cut surface, but can be used as a measure to prevent the coating from falling off. The end face of the incision is yellow. The main applicable materials are aluminum, aluminum alloy, stainless steel, brass, galvanized steel, non-metal, etc.

Step 2: Nitrogen

When cutting certain metals, oxygen forms an oxide film on the cut surface and nitrogen can be used for non-oxidizing cutting to prevent the appearance of an oxide film. The anti-oxidation cutting mask can be welded and coated directly for strong corrosion resistance.

The end face of the incision is white. The main applicable plate is stainless steel, galvanized steel, brass, aluminum, aluminum alloy, etc.

Step 3: Oxygen

Mainly used for laser cutting machine cutting carbon steel. When oxygen reaction heat is used to improve the efficiency of large surface cutting, the resulting oxide film improves the beam absorption coefficient of the reflecting material. The end face of the incision is black or dark yellow. It is mainly used for steel rolling, steel rolling for welding structure, carbon steel, high pressure plate, tool plate, stainless steel, galvanized steel plate, copper, copper alloy, etc.

4. Argon

Argon is an inert gas used to prevent oxidation and nitriding in laser cutting and is also used in welding.

The price of Argon Japonica is rice compared with other processed gases, which increases the cost accordingly. The end face of the incision is white. The main applicable materials are titanium, titanium alloy, etc.