Laser cutting machine is often considered to have high cutting efficiency and better cutting quality, and is more and more used in metal processing. The metal cutting field is glittering. However, there is still no uniform international standard for the quality evaluation of laser cutting. In the eyes of most enterprises and operators, the types of laser cutting may not be very different, but as a professional laser processing, the processing methods of laser cutting machines will be different for different metal material characteristics.

The evaluation of the processing quality of metal laser cutting machine mainly includes the following points: the cutting surface is smooth, the lines are few, and there is no brittle fracture. When the plate is laser cut, the traces of molten materials will not appear in the notch below the vertical laser beam, but will spray out at the back of the laser beam. Curved lines are formed at the cutting edge, and the lines closely follow the moving laser beam. To correct this problem, reduce the feed rate at the end of the cutting process, which can greatly eliminate the formation of lines.

The thermal impact of cutting materials, as the application equipment of thermal cutting processing, is bound to cause thermal impact on materials during the use process, which mainly includes three aspects: the depression and corrosion have adverse effects on the surface of the cutting edge, affecting the appearance of the laser cutting machine. They appear in cutting errors that should be avoided in general; Finally, if the cutting makes the part heated sharply, it will deform.  

Generally speaking, the cutting width does not affect the cutting quality. Only when a particularly precise contour is formed inside the part can the cutting width have an important impact. This is because the cutting width determines the minimum inner diameter of the contour. When the plate thickness increases, the cutting width also increases. Therefore, in order to ensure the same high accuracy, no matter how wide the incision is, the workpiece in the processing area of the laser cutting machine should be constant.

The perpendicularity of the cutting seam is good and the heat affected area is small: when the thickness of the processed material exceeds 18 mm, the perpendicularity of the cutting edge is very important; When away from the focus, the laser beam becomes divergent, and the cutting becomes wider toward the top or bottom according to the location of the focus. The cutting edge deviates from the vertical line by several millimeters. The more vertical the edge is, the higher the cutting quality is.

This is particularly important in fine machining because the profile and connecting piece here are usually only a few tenths of a millimeter wide. Controlling the laser power and using short laser pulses can reduce the heating of components and avoid deformation. The heat affected area refers to the area near the incision that is heated during laser cutting. At the same time, the structure of the material itself changes. For example, some materials can harden. The heat affected area refers to the regional change of internal structure due to high temperature.

About HGTECH: HGTECH is the pioneer and leader of laser industrial application in China, and the authoritative provider of global laser processing solutions. We have comprehensively arranged laser intelligent machine, measurement and automation production lines, and smart factory construction to provide overall solutions for intelligent manufacturing.