Causes and solutions of dregs on laser cutting machine

What should I do if the laser cutting machine always has dregs? The laser cutting machine always has dregs, which will seriously affect the quality of the cut workpiece. Many sheet metal processing companies are troubled by such problems. So can the dregs of the cutting machine be solved? How to deal with it to achieve the ideal cutting effect?
   There are many reasons for the dregs on the laser cutting machine. Generally, we can consider issues such as focus, speed, power, and air pressure. What should I do if the laser cutting machine is always slagging? Let’s give you a detailed introduction through some examples below.
   1. Focus position
  The focal position is the distance from the laser focal point to the surface of the workpiece, which directly affects the roughness of the cut surface, the slope and width of the slit, etc. If the focus position is too advanced, this will increase the amount of heat absorbed by the lower end of the workpiece to be cut. When the cutting speed and auxiliary air pressure are constant, the material being cut and the melted material near the slit will flow on the lower surface in a liquid state. After cooling, the melted material will adhere to the lower surface of the workpiece in a spherical shape; if the position lags behind. The heat absorbed by the lower end surface of the cut material is reduced, so that the material in the slit cannot be completely melted, and some sharp and short residues will adhere to the lower surface of the board.


   2. Speed
When laser cutting, the choice of cutting speed is determined according to the material and thickness of the cut sheet. Different cutting speeds will have a great impact on the quality of laser cutting. The choice of appropriate cutting speed can improve laser cutting. High efficiency and good cutting quality can be obtained.
   3. Power
   When laser cutting, the choice of laser power has an impact on the cutting quality. The cutting power needs to be determined according to the material and thickness of the cut sheet. If the power is too large or too small, a good cutting section cannot be obtained.
   4. Air pressure
  In the laser cutting process, the auxiliary air pressure can blow off the slag during cutting and cool the heat-affected zone of the cutting. The auxiliary gas includes oxygen, compressed air, nitrogen and so on. For some metal materials, inert gas or compressed air is generally used, which can prevent the material from burning.
When the auxiliary air pressure is too high, turbulence appears on the surface of the material, which weakens the ability to remove the molten material, resulting in widening of the slit and rough cutting surface; when the air pressure is too low, the molten material cannot be completely blown away, and the lower surface of the material will stick to it. Scum. Therefore, when cutting, the auxiliary gas pressure should be adjusted to get the best cutting quality.

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