Fiber laser cutting machine auxiliary gas

As a general processing method in modern manufacturing, laser cutting machine breaks the traditional processing method.  And widely used in various industries with new cutting methods, especially fiber laser cutting machine. In recent years, it has developed into a “rocket type”. Fiber laser cutting machine auxiliary gas.
For users of fiber laser cutting machines, CNC cutting machines should know that they must use auxiliary gas during the cutting process. And this is also the case. Many people concern about the problem of “gas”.
Then, today, Tianhong Laser will take everyone to talk about why the fiber laser cutting machine should add auxiliary gas during the cutting process and how to use the auxiliary gas reasonably.

1. Why do you need to add auxiliary gas during processing?

Before figuring out how to select an auxiliary gas, it is first necessary to understand why the auxiliary gas and the auxiliary gas use.
After experience, the use of auxiliary gas can not only blow away the slag in the coaxial slit. But also cool the surface of the processed object. And reduce the heat affected zone, cool the focusing lens, prevent the smoke from entering the lens holder. And contaminating the lens and causing the lens to overheat. Then CNC cutting machine In addition, some cutting gas can also protect the base material. The choice of gas pressure and type has a great influence on the cutting process. So the choice of auxiliary gas type will have certain influence on the cutting performance, including cutting speed and cutting thickness.

2. Auxiliary gas characteristics

The auxiliary gases that can used in laser cutting machines are mainly air, nitrogen, oxygen and argon. And below we will introduce the use and characteristics of XT Laser for different auxiliary gases. (For your reference only)

1. Air

Air can supply directly from the air compressor, so it is very cheap compared to 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. A trace oxide film appears on the cut surface, but it can be used as a measure to prevent the coating layer from falling off. And the end of the incision is yellow.
The main materials are aluminum, aluminum alloy, stainless copper, brass, plated steel, non-metal, etc. However, when the quality of the cut product is high. Then aluminum, aluminum alloy, stainless steel, etc. are not suitable for air because of air. Will oxidize the base metal.

2. Nitrogen

Some metals use oxygen to form an oxide film on the cutting surface during cutting. And nitrogen can used to prevent oxidation-free cutting of the oxide film. Therefore, there is a feature that it can directly weld, smeare, and has high corrosion resistance. The end face of the slit is whitish.
The main applicable plates are stainless steel, plated steel, brass, aluminum, aluminum alloy, etc.

3. Oxygen

Mainly used for laser cutting carbon steel. While the oxygen reaction heat is used to increase the cutting efficiency, the resulting oxide film increases the beam spectral absorption factor of the reflective material. The end of the slit is black or dark yellow.
Mainly used for rolling steel, rolled steel for welding structure, carbon steel for mechanical construction, high tension plate, tool plate, stainless steel, plated steel, copper, copper alloy, etc.

3. Auxiliary gas selection

In the above, many gases can be used in general, and the cost should be considered in terms of cutting cost and product requirements, such as cutting stainless steel materials. When the quality or surface quality of the products is not high, such as cutting products, it is necessary to go through Spraying and other processing steps can use air as a cutting gas, which can reduce many costs. When the cut product is the final product, there is no subsequent process, and it is necessary to use a protective gas, such as a process product. Therefore, in the process of cutting and cutting, the gas must be selected according to the characteristics of the product.