TIME：12-01 2022
After using the fiber laser cutting machine for several years, many customers found that the fiber laser cutting effect is not as good as before. For example, both the accuracy and speed of fiber laser cutting have gone down. So what is the reason for the decline in the processing effect of the fiber laser cutting machine?
In fact, there are many factors that affect the cut quality of sheet fiber laser cutters. Influencing factors may include cutting height, cutting nozzle type, focus position, cutting power, cutting frequency, cutting duty cycle, cutting air pressure, cutting speed, eye protection, gas purity, quality of processing materials, focusing mirrors and collimating mirrors.
Therefore, when we meet the poor cutting quality of fiber laser cutting machine, we can consider the following aspects.
1. LASER POWER
The higher the laser power, the better the cut quality and the better the match between the laser cutting mode and the material.
2. FOCUS POSITION
The focus position affects the cutting accuracy, especially the focus diameter. At the same time, the focus diameter is proportional to the focal depth of the focus lens. The smaller the focal depth of the focus lens, the smaller the focus diameter. And the smaller the diameter of the focus and the smaller the slit, the better the quality of the cut.
3. PROCESSING OF THE MATERIAL
The surface roughness of the material also determines the quality of the cut. In general, the smoother the material, the better the quality of the cut.
4. AUXILIARY GAS
The higher the pressure of the auxiliary gas, the higher the purity of the gas, the less impurities attached to the material and the smoother the cut. The oxygen cut is the fastest. While nitrogen cutting is the best and cheapest. In general, different gases have different shear effects.
5. THICKNESS OF THE PIECE
The thicker the workpiece, the lower the accuracy and the greater the cut. Therefore, the metal fiber laser cutter is more suitable for cutting thin plates. And the processing quality and efficiency of fiber laser cutters are also greatly improved when cutting thin plates.
6. CUTTING SPEED
The cutting speed has a great influence on the cut quality. Proper cutting speed will make the cut surface appear smooth and no slag will be produced at the bottom. If the cutting speed is too fast, the material will not be cut, resulting in sparking, easy slag generation, and even burning of the lens. If the cutting speed is too slow, it is easy to cause the material to overmelt, widen the gap, increase the heat affected area, and even overmelt the workpiece.
7. NOZZLE
The aperture of the nozzle, the distance between the light output of the nozzle and the surface of the material will affect the cutting effect of the fiber laser. Too far between the workpiece and the nozzle will waste kinetic energy. But too close will cause splashing. For this reason, the height of the nozzle and the workpiece must always remain the same during operation. And the most suitable distance is 0.8mm.
