Although the cutting speed of fiber laser cutting machine is much faster than other methods, it should be controlled in a reasonable cutting speed range, too fast or too slow is not good. The cutting speed of laser cutting machine is very important. It has a great influence on the cutting quality of stainless steel plate. The best cutting speed makes the cutting surface smooth and has no slag in the lower part.
If the cutting speed of optical fiber laser cutting machine is too fast, it will lead to steel plate can not be cut through, spark splash, slag in the lower part, and even burn lens. This is because the cutting speed is too high, the energy obtained per unit area is reduced, and the metal can not completely melt.
If the cutting speed of fiber laser cutting machine is too slow, it is easy to cause material overmelting, widening the slit, increasing the heat-affected zone, or even overheating of the workpiece. This is because the cutting speed is too low, energy accumulates at the slit, resulting in widening the slit, the molten metal can not be discharged in time, and slag is formed on the surface of the steel plate. A cutting defect is produced as shown in the following figure.
Relation between Cutting Speed and Cutting Quality of Fiber Laser Cutting Machine
The cutting speed of the fiber laser cutting machine and the output power of the laser together determine the input heat of the processed parts. Therefore, the relationship between the change of input heat and the quality of processing caused by the increase or decrease of cutting speed is the same as that of output power. In general, when adjusting the processing conditions, if the purpose is to change the input heat, the output power and cutting speed will not be changed at the same time, just fix one of them and change the other to adjust the processing quality.