Laser cutting manufacturers believe that several important factors affecting laser cutting accuracy are as follows
The size of the spot after the laser beam is focused: the smaller the spot after the laser beam is focused, the higher the laser cutting accuracy, especially the smaller the slit, the spot can reach 0.01mm.
The walking accuracy of the worktable determines the repeatability of laser cutting. The higher the accuracy of the table, the higher the cutting accuracy.
The greater the thickness of the workpiece, the lower the accuracy and the greater the slit. Since the laser beam is tapered and the slit is also tapered, the material with a thickness of 0.3mm is much smaller than the material with a thickness of 2mm.
The material of the workpiece has a certain influence on the accuracy of laser cutting. In the same situation, the cutting accuracy of different materials is slightly different. Even if it is the same material, if the composition of the material is different, the cutting accuracy will be different.
So, how to achieve high precision during laser cutting?
One is the focus position control technology. The smaller the focal depth, the smaller the focal spot diameter. Therefore, it is very important to control the position of the focus relative to the surface of the material being cut.
The second is cutting and puncture technology. Any kind of thermal cutting technology, except in a few cases, which can start from the edge of the plate, generally requires a small hole in the plate. In the past, in the laser stamping compound machine, a punch was used to punch holes, and then a laser was used to cut small holes.
Third, nozzle design and air flow control technology. When laser cutting steel, oxygen and a focused laser beam are shot onto the cutting material through a nozzle to form an air beam. The basic requirement of the gas flow is that the gas flow into the gap should be large and the flow velocity should be high, so that the notch material has enough oxidation, so that the notch material fully exothermic reaction; at the same time, there is enough momentum to eject the molten material.
Categories: Plate Laser Cutting