What Factors Are Related To The Cutting Speed Of Fiber Laser Cutting Machine For Sheet Metal?

The cutting speed of fiber laser cutting machine for sheet metal is a concern of many processing enterprises, because the cutting speed determines the production efficiency, that is to say, the faster the speed, the higher the overall output. This paper mainly explains the factors affecting the speed of laser cutting machine, the influence of cutting speed of laser cutting machine on cutting quality, and how to improve the cutting speed of laser cutting machine.

Factors affecting the cutting speed of fiber laser cutting machine:

The laser power density of laser cutting machine is a factor that can directly affect the cutting speed. Under the same conditions of other factors, only changing the laser power density, the cutting speed of the material is directly proportional to the laser power density, that is, increasing the power density can improve the cutting speed. The cutting speed is also inversely proportional to the density of the material to be cut. The thicker the plate is, the slower the cutting speed is when other parameters are the same.

The factors affecting the laser cutting speed are related not only to the laser output power, but also to the beam quality mode. According to the characteristics of the beam focusing system, that is, the spot size also has a great impact on the cutting speed of the equipment.

Influence of cutting speed of laser cutting machine on cutting quality:

1. When the cutting speed is too fast, the gas coaxial with the beam cannot completely blow away the cutting residue, and the molten materials on both sides gather and solidify at the bottom edge to form hanging slag that is not easy to clean. Too fast cutting speed will also lead to the material can not be completely cut through, and there will be a certain thickness of adhesion at the bottom. Generally, the adhesion thickness is very small, and it needs to be hammered manually in the follow-up to fall off.

2. When the cutting speed is appropriate, the cutting quality can be improved, the cutting seam is fine and flat, the cutting surface is smooth without burr, the overall workpiece is free of deformation, and the workpiece can be put into use without treatment.

3. When the cutting speed is too slow, the high-energy laser beam stays around for too long and has obvious thermal impact, which will lead to obvious over melting on the opposite side of the cutting, obvious over melting on the top of the cutting and obvious slag hanging on the bottom, and the cutting quality is very unsatisfactory.

How to improve the cutting speed of laser cutting machine?

1. Increase the power and choose a higher power laser generator, such as 10mm stainless steel. 6000W power can be cut to 1.8m/min and 12000W power can be cut to 6m / min.

2. By reducing the size of the focus spot and focusing with a short focus lens, a smaller spot can be obtained.

3. The cutting speed can be optimized by adjusting appropriate process parameters, such as output power, duty cycle, positive and negative focal length.