As we all know, speed and quality are often inversely proportional, higher speed may often comes with lower quality. So, what effect does the cutting speed of the metal laser cutting machine have on the cutting quality? Let’s take a look.
Selection of an appropriate cutting speed is actually very important for laser cutting. The optimal cutting speed range can be selected according to the equipment description or determined by experiment. Due to the difference of thickness, material, melting point, thermal conductivity and surface tension, the cutting speed also changes accordingly.
1. Properly increasing the cutting speed can improve the quality of the incision, that is, the incision is slightly narrower, the surface of the incision is smoother, and the deformation can be reduced at the same time.
2. When the cutting speed is too fast and the linear energy of the cutting is lower than the required value, the jet in the slit cannot quickly blow away the molten cutting melt immediately and form a large amount of drag. With the slag hanging on the cut, the surface quality of the cut decline.
3. When the cutting speed is too low, because the cutting point is the anode of the plasma arc, in order to maintain the stability of the arc itself, the anode spot or anode area must find a place to conduct current near the slit closest to the arc, and at the same time, it will be in the radial direction of the jet. More heat is transferred, so the cut is widened. The molten material on both sides of the cut gathers and solidifies at the bottom edge, forming a slag that is not easy to clean, and the upper edge of the cut is rounded due to excessive heating and melting.
4. When the speed is extremely low, the arc will even extinguish due to the incision being too wide.
In summary, the good cutting quality and cutting speed of the metal laser cutting machine are inseparable, which requires us to learn carefully in the actual operation, and find the best balance of speed and quality, and let the equipment play its maximum value!