Fiber Laser Cutting Machine commonly used gas
As a common processing method for modern manufacturing, laser cutting machine breaks the traditional processing method andis widely used in all walks of life with a new cutting method, especially the fiber laser cutting machine, which has been developing in a "rocket type" in recent years. And users who understand fiber laser cutting machine should know
that it must use auxiliary gas in the cutting process, which is exactly the same.
Many people are more concerned about the "gas" problem.
Why are auxiliary gases added during processing?
Before figuring out how to choose an auxiliary gas, you must first understand why it is used and the role of the auxiliary gas.
After experience, in addition to using the auxiliary gas to blow away the slag in the coaxial cutting slot,
it can also cool the surface of the processing object, reduce the heat affected zone, cool the focusing lens,
prevent smoke and 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 material. The choice of gas pressure and type has a great impact on the cutting process. Choosing the type of auxiliary gas will affect the cutting performance, including cutting speed, cutting thickness, etc.
The auxiliary gases that can be used in laser cutting machines are mainly air, nitrogen, oxygen,
and argon. Let us introduce the uses and characteristics of different auxiliary gases for everyone.
1.Air
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 that of oxygen,
and the cutting ability is similar to that of nitrogen. A small amount of oxide film appears on the cut surface,
but it can be used as a measure to prevent the coating layer from falling off. The end face of the incision is yellow.
The main applicable materials are aluminum, aluminum alloy, stainless copper, brass, galvanized steel, non-metal, etc.,
but when the quality requirements of the cut products are high, aluminum, aluminum alloy, stainless steel, etc. are not suitable for air because Will oxidize the base material.
2.Nitrogen
Some metals use oxygen to form an oxide film on the cutting surface when cutting,
and nitrogen can be used to prevent the oxidation-free cutting of the oxide film. Therefore,
it has the characteristics of direct welding and painting, and strong corrosion resistance. The incision end surface is white.
The main applicable plates are stainless steel, galvanized steel, brass, aluminum, aluminum alloy, etc.
3.Oxygen
It is mainly used for laser cutting of carbon steel. The use of oxygen reaction heat large-format to improve cutting efficiency,
while the resulting oxide film will increase the spectral absorption factor of the reflective material's beam. The end face of the cut is black or dark yellow.
Mainly applicable for rolled steel, rolled steel for welded structure, carbon steel for mechanical structure,
high tension plate, tool plate, stainless steel, electroplated steel plate, copper, copper alloy, etc.
4.Argon
Argon is an inert gas. It is used to prevent oxidation and nitridation in laser cutting and is also used in welding.
Compared with other processing gases, the price is higher and the cost is increased accordingly.
The incision end surface is white. The main applicable materials are titanium and titanium alloys.
In the above content, many gases can be used universally. The main consideration is cutting cost and product requirements, such as cutting stainless steel materials.
When the product quality or surface quality is not very high, such as cutting the product,
it still needs to go through Spray painting and other processes can use air as the cutting gas, which can reduce many costs.
When the cut product is the final product, without subsequent processes, a protective gas such as a process product is required. Therefore, in the process of cutting and blanking, the gas must be selected according to the characteristics of the product