The focus of the laser cutting machine is on the workpiece
The focus position on the workpiece is called negative focal length, because the position of the cutting point is neither on the surface nor inside the workpiece, but above the cutting material. When the focus position is on the workpiece, it is due to the relatively high thickness of the plate. If the focus is not positioned in this way, it may lead to insufficient oxygen delivered by the nozzle, resulting in the decrease of cutting temperature and the inability to cut the material. However, there is a significant disadvantage that the cutting surface is rough and not suitable for precision cutting.
The above is the focus position and difference analysis of the laser cutting machine. In the process of using the laser cutting machine, different focus modes are selected according to the processing needs of different workpieces, which can give full play to the performance advantages of the laser cutting machine and ensure the cutting effect. Laser generates light by material excitation. This light band has strong temperature. When contacting the material, it can quickly melt on the material surface to form holes, and form cutting according to the movement of position to point. Therefore, compared with the traditional cutting method, this cutting method has smaller gap and can save most materials. However, it is defined and analyzed according to the cutting effect, The material cut by laser has satisfactory cutting effect and high accuracy, which inherits the advantages of laser and is not comparable to ordinary cutting methods.