Factors of affecting the cutting speed of laser cutting machine

Factors of affecting the cutting speed of laser cutting machine

The cutting speed of laser cutting machines has always been a topic of concern for many processing companies.

Below I explain from three factors that affect the cutting speed of the laser cutting machine, the cutting speed of the laser cutting machine on the cutting quality and how to improve the cutting speed of the laser cutting machine.

Factors of affecting the cutting speed of laser cutting machine

 

First of all, what are the cutting speeds of laser cutting machines?

For a given laser power density and material, the cutting speed is in accordance with an empirical formula. As long as the threshold is above the pass threshold, the cutting speed of the material is proportional to the laser power density, ie increasing the power density increases 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 spot size after focusing, also have a large effect on laser cutting.

Factors of affecting the cutting speed of laser cutting machine

Secondly, what is the impact of the cutting speed of the laser cutting machine on the cutting quality?

1. When the cutting speed is too low, since the cutting point is the anode of the plasma arc. And at the same time, it will flow toward the jet. More heat is transfer radially. Forming a dross that is difficult to clean. And the upper edge of the slit is round due to excessive melting by heating.
2. Appropriate improvement of the cutting speed can improve the quality of the incision,  the surface of the incision is flatter, and the deformation can be reduce.
3. The cutting speed is too fast, so that the line energy of the cutting is lower. The jet in the slit cannot quickly blow off the melted cutting melt to form a large rear drag, accompanied by the slit slag, the slit The surface quality is degraded.

Factors of affecting the cutting speed of laser cutting machine

Finally, how to improve the cutting speed of laser cutting machine?

1. Increase power (in a certain range, such as 500 ~ 2 000W);
2. Improve the beam mode (such as from high-order mode to low-order mode until TEM00);
3. Reduce the size of the focused spot (such as focusing with a short focal length lens);
4. Cutting materials with low initial evaporation energy (such as plastics, plexiglass, etc.); cutting low-density materials (such as white pine, etc.); cutting thin materials.

Factors of affecting the cutting speed of laser cutting machine