Analysis on the cutting speed of laser cutting machine

Laser cutting machine equipment is a highly intelligent, highly mechanized cutting equipment with the advantages of high precision and low pollution. It replaces the traditional cutting method and becomes 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 will explain the factors that affect the cutting speed of the cutting machine, the influence of speed on the cutting quality and how to increase the cutting speed of the laser cutting machine.

What are the factors 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 to the beam quality mode. In addition, the characteristics of the beam focusing system, namely the size of the focused spot, also have a great influence on laser cutting.

What are the effects of the cutting speed of the laser cutting machine on the cutting quality?

1. When the cutting speed is too low, because the cutting site is the anode of the plasma arc, in order to maintain the stability of the arc itself, the anode spot or the anode area must find a place to conduct current near the slit closest to the arc, and at the same time it will flow 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 to form dross that is not easy to clean, and the top edge of the incision forms a rounded corner due to excessive heating and melting.

2. Properly increasing the cutting speed can improve the quality of the cut, that is, the cut is slightly narrower, the surface of the cut 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. The jet in the cutting seam cannot quickly blow off the molten cutting melt immediately and form a large back drag, and accompanied by cutting slag, The surface quality of the cut is reduced.

How to improve the cutting speed of laser cutting machine?

1. Increase the power (within a certain range, such as 500～2000W);

2. Improve the beam mode (such as from high-order mode to low-order mode to TEM00);

3. Reduce the focus spot size (such as using a short focal length lens to focus);