Views: 607 Author: Site Editor Publish Time: 2023-04-18 Origin: Site
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Laser cutting machine is a common processing method in modern manufacturing industry. It breaks the traditional processing method and is widely used in all walks of life with a new cutting method, especially fiber laser cutting machine. And users who understand fiber laser cutting machine should know that it must use auxiliary gas in the cutting process, which is also the case. Many people are more concerned about the problem of "gas".
Why add auxiliary gas during processing?
After a summary of 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, reduce the heat affected area, cool the focusing lens, and prevent the dust from entering the lens holder to contaminate the lens and cause the lens to overheat; In addition, some cutting gases can also protect the base metal. The choice of gas pressure and type has a great influence on the cutting process. The choice of auxiliary gas type will have a certain impact on the cutting performance, including cutting speed, cutting thickness, etc.
The auxiliary gases that can be used in laser cutting machine are mainly air, nitrogen, oxygen and argon
Air can be provided directly by 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 oxygen, and the cutting capacity is similar to nitrogen. A small amount of oxide film will appear on the cutting surface, but it can be used as a measure to prevent the coating film from falling off. The incision face yellowed.
The main applicable materials are aluminum, aluminum alloy, stainless copper, brass, plated steel, non-metal, etc. However, when the quality requirements of the cutting products are high, aluminum, aluminum alloy, stainless steel, etc. are not suitable for air, because air Will oxidize the base metal.
Some metals use oxygen to form an oxide film on the cutting surface when cutting, and use nitrogen to perform non-oxidative cutting to prevent the oxide film. Therefore, it has the characteristics of direct welding, painting, and strong corrosion resistance. The cut ends are whitish.
The main applicable plates are stainless steel, plated steel plate, brass, aluminum, aluminum alloy, etc.
Mainly used for laser cutting carbon steel. When the cutting efficiency is improved by using the large size of the reaction heat of oxygen, the oxide film will increase the spectral absorption factor of the reflecting material. The end face of the incision is black or dark yellow.
It is mainly applicable to rolled steel, rolled steel for solution joint structure, carbon steel for mechanical structure, high tension plate, tool plate, stainless steel, electroplated steel plate, copper, copper alloy, etc.
Argon gas is an inert gas. It is used to prevent oxidation and nitridation during laser cutting. It is also used in welding. Compared with other processing gases, the price is high and the cost is increased accordingly. The cut ends are whitish.
The main applicable materials are titanium and titanium alloys.
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