1. The cutting surface is smooth, with few lines and no brittle fracture
When laser high-temperature cutting plate, the traces of molten material will not appear in the notch under the vertical laser beam, but will be sprayed out at the back of the laser beam. As a result, curved lines are formed on the cutting edge, and the lines closely follow the moving laser beam. In order to correct this problem, reducing the feed rate at the end of the cutting process can greatly eliminate the formation of lines;
2. Narrow slit width
Generally speaking, the cutting width does not affect the cutting quality. Only when a particularly precise profile is formed inside the part, the cutting width has an important impact. This is because the cutting width determines the minimum inner diameter of the profile. When the thickness of the plate increases, the cutting width also increases. Therefore, in order to ensure the same high accuracy, no matter how large the incision width is, the workpiece should be constant in the processing area of the laser cutting machine;
3. Good perpendicularity of cutting seam and small heat affected area
When the thickness of the processing material exceeds 18mm, 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 position of the focus. The cutting edge deviates from the vertical line by several millimeters. The more vertical the edge, the higher the cutting quality;
4. Thermal effect of cutting material
As a thermal cutting application equipment, it is bound to have a thermal impact on the material in the process of use, which mainly includes three aspects: A. heat affected area; b. Pitting and corrosion; c. Material deformation
Wherein the heat affected area refers to the area near the incision that is heated in laser cutting. At the same time, the structure of the material itself changes. For example, some materials may harden. The heat affected area refers to the regional change in the internal structure due to high temperature; The dent and corrosion have an adverse effect on the surface of the cutting edge and affect the appearance of the laser cutting machine. They appear in cutting errors that should be avoided in general; Finally, if the cutting causes the component to heat up sharply, it will deform. This is particularly important in fine machining, where the contours and connecting pieces are usually only a few tenths of a millimeter wide. Controlling laser power and using short laser pulses can reduce component heating and avoid deformation.