Causes of Edge Burning and Slag Hanging in Laser Cutting Sheet Metal Parts When laser cutting sheet metal parts, a large amount of heat will be generated. Normally, the heat generated by cutting will spread along the cutting seam to the processed sheet metal and be fully cooled.
In the process of metal laser cutting machine, the outer side of the hole can be fully cooled, while the inner side of the single hole has a small space where the heat can diffuse, and the heat energy is too concentrated to cause over burning and slag hanging. In addition, during thick plate cutting, the molten metal accumulated on the material surface during perforation and the heat accumulation will lead to the disorder of auxiliary air flow and excessive heat input, which will lead to over burning.
Solution to overburning during laser cutting carbon steel pinhole: In carbon steel cutting with oxygen as auxiliary gas, the key to solve the problem is how to inhibit the generation of oxidation reaction heat. It can adopt the method of assisting oxygen during perforation and lagging over to assist air or nitrogen for cutting. This method can machine small holes of 1/6 thick plate.
The pulse cutting conditions with low frequency and high peak output power can reduce the heat output and help optimize the cutting conditions. Setting the conditions as single pulse laser beam, high peak output of energy intensity and low frequency can effectively reduce the accumulation of molten metal on the material surface during the perforation process and effectively inhibit the heat output.
Solution for laser cutting of aluminum alloy and stainless steel: In the processing of such materials, nitrogen is used as the auxiliary gas, and edge burning will not occur during cutting. However, due to the high temperature of the material inside the small hole, the slag hanging on the inside will be more frequent.
