Why should we need auxiliary gas when we using fiber laser cutting machine ?
More and more manufacturers choose to use a fiber laser cutting. Cause it is non-contact and less consumption. Why should we need auxiliary gas when we using fiber laser cutting machine cutting metals?
Above all, reasons.
The gas will start chemical reaction with the metal material. It will increase the working capacity.
The gas can blow off the slag by air and clean the cutting seam.
Third, avoid shape change of the material.
The gas will cool the area around cutting seam. It can avoid shape change of the material.
Last but most important, protect the lens.
To protect the focus lens. Avoid combustion products hurting lens.
Normally, O2 ( Oxygen) , N (Nitrogen) and Compressed Air will be used.
Their functions are as following.
First, N: Nitrogen is used for cutting nonferrrous metal. Such as Stainless Steel and Aluminum sheet. The gas can cool and protect the material. As such materials are easy to be blackened with Oxygen.So use Nitrogen can avoid this phenomenon of going black. It can be used to cut
aluminum alloy, stainless steel, galvanized steel sheet, brass.
Second, O2: Oxygen is used in cutting Carbon Steel and stainless steel. As there is many Carbonaceous impurities in carbon steel. So use O2 can greatly increase the combusting speed. Which as well, accelerating cutting speed. However, there is a disadvantage, the cutting surface will be black.
Third, Compressed Air: It can be provided by Air Compressor, the price is very low. Although there is about 20% Oxygen in air. The cutting efficiency is far less than Oxygen.It nearly same as Nitrogen’s efficiency.The cutting surface appears yellow. It can be used to cut aluminum, aluminum alloy, stainless steel, galvanized steel sheet, nonmetal, etc.
If you have any questions about fiber laser cutting. Please contact us with no hesitation.