For sheet metal cutting, laser technology has already become a mature and efficient production method. There are thousands of cutting systems around the world.

However, when the sheet metal laser cutting machine is working, it will generate a lot of heat. Normally, the heat will spread to the interior of the sheet metal along the cutting section. In the process of small hole processing, the outer side of the hole can be fully cooled, but the small hole part inside the single hole has a small diffusion space, and the heat diffusion cannot be too concentrated to cause overheating, slag hanging, etc.

In addition, during thick plate cutting, the molten metal accumulated on the surface during the perforation process and the high heat accumulation required for thick plate cutting will disorder the auxiliary gas, resulting in an increase in heat, which will lead to the generation of overburn.

Today, Xiaobian will take you to know how to avoid overburning during laser cutting of sheet metal.

1、Add Cooling Point Or Use Ring Cut Function

When cutting plates with sharp corners, the position where overburning is easy to occur is often at the sharp corner, and overburning will cut the sharp corner into a circle.

At this time, a cooling point can be added at the sharp corner, and a pause and air blowing at the sharp corner can effectively avoid overburning. Or adopt the ring cutting function, which can avoid the over burning phenomenon caused by excessive heat due to slow speed at sharp corners.

2、Use High Power Laser

When cutting carbon steel, a higher power laser can be used, and the bright side cutting process can effectively avoid overburning, and this cutting process can cut the finished product without burrs and with bright section. High power can effectively avoid over burning.

3、Cutting With Nitrogen

In the sheet metal cutting with oxygen as the auxiliary gas, nitrogen can be switched for cutting. When cutting with nitrogen, the material is completely melted by laser energy, and the chemical reaction between nitrogen and sheet metal itself will not occur easily.

The temperature in the melting point area is relatively low. With the cooling and protection of nitrogen, the reaction is stable and uniform, and the cutting quality is high. The section is fine and smooth, the surface roughness is low, and there is no oxide layer.

4、Increase Air Pressure

When laser cutting machine is used to process aluminum alloy and stainless steel, nitrogen or air 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, slag hanging will occur frequently inside. In this case, burr and slag can be reduced by increasing the pressure of auxiliary gas.

About HGTECH: HGTECH is the pioneer and leader of laser industrial application in China, and the authoritative provider of global laser processing solutions. We have comprehensively arranged laser intelligent machine, measurement and automation production lines, and smart factory construction to provide overall solutions for intelligent manufacturing.