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Causes and solutions of edge burning of metal laser cutting machine

When laser cutting sheet metal parts, it will generate a lot of heat, and the heat will not spread in time, resulting in the phenomenon of edge burning. In the small hole processing of the metal laser cutting machine, the outside of the hole can be cooled, but the inside of the single hole small hole is too concentrated due to the small heat dissipation space, resulting in overfire, slagging, etc. In addition, in the cutting of thick plates, the accumulation of molten metal and heat accumulation on the surface of the material will cause turbulence in the auxiliary airflow and overheat input, resulting in excessive combustion and edge combustion.

So, how to solve the problem of edge burning and slag hanging?

Solution for excessive burning of small holes in laser cutting carbon steel: In carbon steel cutting with oxygen as an auxiliary gas, the key to solving the problem is how to suppress the generation of oxidation reaction heat. Auxiliary oxygen, auxiliary air or nitrogen cutting methods can be used. This method can be used to process small holes with an upper limit of 1/6 thickness.

Pulse cutting conditions with low frequency and high peak output power can reduce heat output and optimize cutting conditions. Setting single pulse laser beam, high energy peak output and low frequency conditions can reduce the accumulation and heat output of molten metal on the surface of the material.

The solution to this problem is to increase the pressure of the auxiliary gas and set the conditions to high peak output and low frequency pulses. When air is used as an auxiliary gas, such as using nitrogen, excessive combustion will not occur, but slag can easily appear at the bottom. It is necessary to set the conditions to high auxiliary pressure, high peak output and low frequency pulse conditions.

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