1. Roughness
The laser cutting section will form vertical lines. The depth of the lines determines the roughness of the cutting surface. The shallower the lines, the smoother the cutting section. Roughness not only affects the appearance of edges, but also affects the characteristics. In most cases, it is required to reduce the roughness as much as possible, so the shallower the lines, the higher the cutting quality.
2. Perpendicularity
How to make the thickness of the sheet metal exceed 10mm, and the perpendicularity of the cutting edge is very important. When away from the focus, the laser beam becomes divergent. According to the focus position, the cutting direction is toward the top or the bottom becomes wider. The cutting edge violates the vertical line by several millimeters. The more vertical the edge is, the higher the cutting quality is.
3. Cutting width
Generally speaking, the cutting width does not affect the cutting quality. Only when a particularly fine induction is formed inside the component, the cutting width has an important impact. This is because the cutting width determines the minimum induction. When the plate thickness increases, the cutting width also increases. Therefore, to ensure equal high accuracy, no matter how large the cutting width is, the workpiece should be stable in the processing area of the laser cutting machine.
4. Grain
When cutting thick plates at high speed, molten metal will not appear in the cutoff below the vertical laser beam, but will spray out at the back of the laser beam. The effect is that the curved lines form on 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 lines.
5. Burrs
The composition of burr is a very important factor to determine the quality of laser cutting. Because the removal of burr requires additional work, the severity and quantity of burr can directly determine the quality of cutting.
6. Material accumulation
The laser cutter first touches a layer of special oily liquid on the surface of the workpiece before the initial melting and piercing. During the cutting process, because of gasification and various materials are not used, the customer uses wind to remove the blockage, but the upward or downward discharge will also form a pile on the surface.
7. Pits and corrosion
Dents and corrosion affect the surface of the cutting edge and affect the appearance. They appear in cutting errors that should normally be avoided.
8. Heat affected area
In laser cutting, it is heated along the nearby area. Together, the structure of the metal changes. For example, some metals harden. The heat affected area refers to the depth of the area where the internal structure changes.
9. Deformation
Suppose the cutting causes the part to heat up sharply, and it will deform. This is particularly important in fine processing, because induction and connecting pieces here generally only need very few millimeters wide. Controlling the laser power and using short laser pulses can reduce the heating of components and avoid deformation.
Nine Standards for Quality Judgment
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