What Is The Reason For The Dregs After The Laser Cutting Machine Is Cut?

Laser cutting machines are widely used in daily life, ranging from electric vehicles to pots and pans. Laser cutting machines are faster and more precise than traditional cutting methods. Its working principle is to use a high-energy laser beam to heat the target area to melt it to achieve the purpose of cutting. There may be dross on the workpiece during cutting. What is the reason? How to deal with it?

What is the reason for the dregs after the laser cutting machine is cut? We call the molten metal remaining on the cutting back of those workpieces as dross. The laser cutting machine will generate a lot of heat during processing. Generally speaking, the heat generated during cutting will spread to the entire workpiece along the kerf, and then the workpiece will be sufficiently cooled. However, when cutting small-hole workpieces, the outside of the hole can be sufficiently cooled, and the inside of the hole has a small space for heat diffusion, and the heat is too concentrated, which causes excessive dross. In addition, when cutting thick plates, the molten metal accumulated on the surface of the material and the heat accumulation generated during the perforation will cause the auxiliary airflow to be disturbed, and the heat input will be too much, which will cause dross.

How to solve it? After cutting dross, first find out the cause from the following points, and then adjust it to solve the dross generation.

1. The laser output power is not enough

When cutting thick plates, the power is not enough to melt the entire plate. If the power can be adjusted, you can increase the power to continue testing whether it can be cut off. If the power has been adjusted to the maximum, you need to replace the laser with a higher power.

2. The focus of the laser beam is deviated

If the focus is too close or too far, it will affect the cutting quality. It can only be adjusted by inspection and adjusted according to the offset position.

3. The pressure of the auxiliary gas is not enough

The auxiliary gas can blow off the slag during cutting and cool the heat-affected zone of cutting. If the air pressure is too small, the residue cannot be blown out of the workpiece or the workpiece cannot be cooled in time, resulting in the formation of dross. Just adjust the air pressure to a suitable size.

4. The cutting speed is too fast or too slow

If the feed speed of laser cutting is too fast, the workpiece cannot be cut in time, the cutting surface will form a diagonal stripe road, and there will be dross in the lower half of the area. If the feed speed is too slow, overmelting will occur, the cut surface will be rough as a whole, the slit will become wider, and there will be slagging on the upper part.