Main factors affecting the cutting process of fiber laser machine

In the previous blog, we talked about the factors affecting cutting process like the purity of cutting oxygen, the flow rate of cutting oxygen, etc. Today, we continue to learn other factors which affecting the cutting process like the cutting oxygen pressure, the shape of the cutting oxygen flow, the cutting inclination, the preheating flame power and the composition and properties of the metal being cut on the cutting process.

Cutting oxygen pressure

As the cutting oxygen pressure is increased, the cutting oxygen flow rate is correspondingly increased, and the ability to remove the slag is enhanced, so that the thickness that can be cut increases. However, the pressure increases to a certain value, and the thickness of the cutting also reaches a maximum value. At this time, if the pressure is increased, the thickness of the cut is reduced. When cutting with a common cutting nozzle, the cutting speed is increased as the pressure is increased at a lower pressure, but the cutting speed is decreased when the pressure exceeds 0.3 mpa. Cutting with a diffusion type cutting nozzle is such that if the cutting pressure conforms to the design pressure of the cutting nozzle, when the pressure is increased, since the tassel and momentum of the cutting oxygen flow also increase, the cutting speed is also increased as compared with the conventional cutting nozzle.

Cutting oxygen flow shape

In order to obtain good cutting quality, the cutting oxygen flow is required to maintain the cylindrical shape in the longest possible range，and the boundary line is clear and straight and powerful. If the wind line is thick and the boundary line is chaotic, not only the speed is lowered, but also the quality of the cutting surface. Deterioration, the lower edge of the incision adheres to the slag.

Cutting angle

As the cutting inclination increases, the cutting speed will increases. When the cutting inclination reaches a certain limit, the cutting speed reaches the maximum value. At this time, if you continue to increase the cutting angle, the cutting speed will decrease. And the cutting nozzle type and the thickness of the cut steel plate are both affected the cutting angle at which the cutting speed reaches a maximum.

Preheating flame energy rate

If the flame is too strong, the upper edge of the slit may be collapsed, and the beads may be adhered, the quality of the cut surface may be deteriorated, and the lower edge of the slit may be slag. If the flame is too weak, it will slow down the cutting speed, and it is prone to problems such as cutting interruption, tempering, and increased drag.

Initial temperature and surface state of steel plate

If there is a thick scale such as scale and yellow rust on the surface of the steel plate, the cutting speed will be lowered, and the cutting even will be interrupted.

Slag viscosity

If the slag has low viscosity and good fluidity, it is easily blown away by cutting oxygen, and the cutting speed can be accelerated.

Through the above two articles, we have learned about several major factors that affect the cutting process. If you want to know other things about laser cutting machines, let us know. We will keep updating the laser industry related information and laser related knowledge, please pay attention to us.