Cutting speed of laser cutting machine

Release Time:2022-07-06

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Laser cutting machine equipment is a highly intelligent and highly mechanized cutting equipment with the advantages of high precision and low pollution. It has replaced the traditional cutting method and has become one of the main equipment for cutting and material preparation. However, the cutting speed of laser cutting machines has always been a topic of concern to many companies. Below, the editor of Baiwei Laser will explain the factors affecting the cutting speed of the cutting machine, the impact of speed on the cutting quality and how to improve the cutting speed of the laser cutting machine.

What factors are related to the cutting speed of the laser cutting machine?
For a given laser power density and material, the cutting speed conforms to an empirical formula. As long as it is above the pass threshold, the cutting speed of the material is proportional to the laser power density, that is, increasing the power density can increase the cutting speed. The cutting speed is inversely proportional to the density (specific gravity) and thickness of the material being cut. (PS: The power density referred to here is not only related to the laser output power, but also related to the beam quality mode. In addition, the characteristics of the beam focusing system, that is, the focused spot size also has a great influence on laser cutting.)

What is the effect of the cutting speed of the laser cutting machine on the cutting quality?
1. When the cutting speed is too low, since the cutting place 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 for conducting current near the slit closest to the arc, and at the same time, it will send the current to the jet. More heat is transferred radially, thus making the cut wider. The molten material on both sides of the incision gathers and solidifies at the bottom edge, forming slag that is not easy to clean, and the upper edge of the incision is rounded due to excessive heating and melting.
2. Properly increasing the cutting speed can improve the quality of the incision, that is, the incision is slightly narrowed, the surface of the incision is smoother, and the deformation can be reduced. 3. The cutting speed is too fast, so that the cutting line energy is lower than the required value, and the jet in the slit cannot quickly blow off the molten cutting melt and form a large amount of back drag. The quality of the cut surface is degraded.

How to improve the cutting speed of laser cutting machine?
1. Increase the power (within a certain range, such as 500-2 000W); 2. Improve the beam mode (such as from high-order mode to low-order mode to TEM00); 3. Reduce the size of the focusing spot (such as using a short focal length lens to focus); 4. Cutting materials with low initial evaporation energy (such as plastic, plexiglass, etc.); cutting low-density materials (such as white pine, etc.); cutting thin materials.

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