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The main factors affecting the fiber laser cutting machine during the cutting process

The main factors affecting the fiber laser cutting machine during the cutting process
The main factors affecting the fiber laser cutting machine in the cutting process (including cutting speed and quality) are: the purity of cutting oxygen, the flow rate of cutting oxygen, the flow rate and pressure, the shape of the cutting oxygen flow, the cutting inclination, and the power of the preheating flame , the composition and properties of the metal being cut, etc.
In the process of gas cutting, the cutting oxygen flow plays a leading role. On the one hand, it burns the metal, and on the other hand, it blows the slag produced by the combustion from the incision. Therefore, some parameters related to cutting oxygen flow, such as purity, flow rate, flow rate, pressure and oxygen flow shape are the main parameters affecting the cutting process.
(1) Purity of cutting oxygen
The higher the purity of the cutting oxygen, the faster the combustion reaction and the faster the cutting speed. If the oxygen purity is poor, not only the cutting speed will be greatly reduced, the cutting quality will be worse, and the oxygen consumption will increase. For example, if the oxygen purity is reduced from 99.5% to 98%, the cutting speed will decrease by 25%, while the oxygen consumption will increase by 50%. In order to obtain a gas cutting incision without sticky slag, the oxygen purity needs to reach more than 99.5%.
(2) Cutting oxygen flow
In order to complete gas cutting, a sufficient amount of oxygen needs to be supplied to the reaction. If the oxygen flow is insufficient, the metal cannot be fully burned, which is likely to cause sticky slag and slow the cutting speed. Too much oxygen flow will cool the metal, easily cause slag, and even cause insufficient preheating of the metal, which will interrupt the cutting.
With the increase of oxygen flow, the cutting speed gradually increases. For good quality cutting, the cutting speed gradually increases with the increase of oxygen flow, but when it exceeds a certain limit value, the cutting speed decreases instead. Therefore, there is an optimal oxygen flow value for a certain thickness of steel plate, at this time not only the cutting speed is the highest, but also the cutting surface quality is good.
(3) Cutting oxygen pressure
As the cutting oxygen pressure increases, the cutting oxygen flow increases correspondingly, and the ability to remove sticky slag increases, so the thickness that can be cut increases accordingly. However, when the pressure increases to a certain value, the thickness that can be cut also reaches the maximum value. If the pressure is increased again, the thickness of the cutting decreases. When cutting with an ordinary cutting nozzle, when the pressure is low, the cutting speed increases with the increase of the pressure, but when the pressure exceeds 0.3mpa, the cutting speed decreases instead. When cutting with a diffusion type cutting nozzle, if the cutting pressure conforms to the design pressure of the cutting nozzle, when the pressure increases, the flow rate and momentum of the cutting oxygen flow also increase, so the cutting speed is also increased compared with the ordinary cutting nozzle.
(4) Cutting the oxygen flow shape
In order to make the incision width consistent up and down along the thickness direction and obtain good cutting quality, the cutting oxygen flow is required to maintain a cylindrical shape as long as possible, and the boundary line is clear and straight and powerful. If the wind line is thick and the boundary line is chaotic, then Not only does the speed decrease, but the quality of the cut surface deteriorates, and slag adheres to the lower edge of the incision.
(5) Cutting inclination
As the cutting inclination increases, the cutting speed increases. When the cutting inclination reaches a certain limit angle, the cutting speed reaches the maximum value. If the cutting inclination continues to increase, the cutting speed decreases instead. The type of cutting nozzle and the thickness of the steel plate to be cut will affect both. The inclination angle of the cutting when the cutting speed reaches the maximum value.
(6) Preheating flame energy rate
If the flame is too strong, the upper edge of the incision may collapse, and bead-like droplets may adhere, the quality of the cutting surface will deteriorate, and the lower edge of the incision will stick to slag. If the flame is too weak, the cutting speed will be slowed down, cutting interruption will easily occur, and the drag will increase after tempering.
(7) Initial temperature and surface condition of steel plate
The high initial temperature of the steel plate can speed up the cutting speed and significantly reduce the consumption of cutting oxygen.
When there is thick oxide scale, yellow rust and other dirt on the surface of the steel plate, the cutting speed will be reduced, and the cutting will be interrupted in severe cases.
(8) Slag viscosity
The slag has low viscosity and good fluidity, and is easy to be blown away by cutting oxygen, and the cutting speed can be accelerated.

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