Do you know how to realize the low-cost of laser cutting technology?
With the laser cutting industry competition more and more intense, how to improve efficiency and save the cost becomes a considering problem of most users.
Fiber Laser cutting machine quickly become mainstream with advantages of the fast cutting speed, small deformation of material and high processing accuracy, etc.
Especially, the application of high-power lasers greatly improves the efficiency of laser processing.
Above sheet shows the comparison of different power fiber laser cutting machine corresponding the Nitrogen cutting speed of stainless steel.
It reveals that as for stainless steel cutting, the higher laser power, the fast cutting speed is.
The common cutting auxiliary gas of fiber laser cutting machine is O2, N2 and air.
Because the cost of O2, N2 are higher than compressed air, using compressed air as auxiliary gas can reduce processing cost widely.
O2 is mainly for cutting carbon steel.
And the principle is that oxygen and metal oxidation reaction give off a lot of heat.
At the same time, a certain airflow will blow oxide and slag from the reaction zone which will form a cut in the metal.
1.The application of N2 during the laser cutting process
N2 is mainly for cutting stainless steel， aluminum plate, and steel plate with certain thickness at the same time.
The higher power, the bigger cutting thickness of carbon steel sheet.
It rely on laser energy to melt the metal, blowing away the molten material with high pressure.
In order to ensure the unreasonable chemical reactions don not occur during the cutting process.
We can get a brighter section effect in stainless steel, aluminum cutting, sharp angle effect is better.
The air itself exists in the atmosphere.
It is compressed into a gas storage tank by an air compressor and then filtered, cooled and dried to remove water and oil from the air.
The cutting principle of air is same as N2.
It can also cover the shortage of O2, N2 as the air contents approximately 20% O2.
Let’s take 8KW fiber laser cutting machine for example .
We will compare cutting effect of all kinds of auxiliary gas between stainless steel and carbon steel.
From top to bottom: 12 mm nitrogen cutting section of stainless steel, 12 mm air cutting section of stainless steel, 12 mm air cutting polished section of stainless steel.
Compared with nitrogen cutting, cross section of air cutting is a little black and don’t hang slag.
And it can also achieve brightness after polishing
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