The so-called heat affected zone refers to the area near the laser cut that is heated during the processing, causing a certain change in the structure of the metal, which can lead to the phenomenon of hardening of the metal. The existence of heat affected zones is relatively unfavorable for laser cutting, especially for the smoothness of the surface and edges of sheet metal parts. In addition to hardening the metal, the heat affected zone can also cause dents and corrosion at the metal edges, which may lead to errors in the actual machining process. And for laser cutting machinesEspecially in the precision machining process, subtle changes can lead to errors in the accuracy of sheet metal parts, directly affecting the machining quality.

The surface roughness of laser cutting mainly depends on the following three aspects:
① The inherent parameters of the cutting system, such as spot mode, focal length, etc;
② Adjustable process parameters during the cutting process, such as power, cutting speed, auxiliary gas type, and pressure;
③ The physical parameters of processed materials, such as laser absorption rate, melting point, viscosity coefficient of molten metal oxides, surface tension of metal oxides, etc.In addition, the thickness of the workpiece also has a significant impact on the surface quality of laser cutting. Relatively speaking, the smaller the thickness of the metal workpiece, the higher the roughness level of the cutting surface, so choose a suitable laser cutting machineIt has a positive driving effect on improving production efficiency.