A Metal laser cutting machine cutting cutting quality mainly depends on the cutting quality, to check the equipment is not qualified direct method. For users, in the purchase of equipment laser manufacturers will show the scene cutting proofing effect, cutting speed, cutting sample quality from which several aspects to analyze and identify?
If the sheet metal thickness is more than 10mm, the verticality of the cutting edge is very important. Away from the focus, the laser beam becomes divergent and the cut widens toward the top or bottom, depending on where the focus is. The cutting edge deviates a few hundredths of a millimeter from the vertical line. The more vertical the edge, the higher the cutting quality.
Laser cutting section will form a vertical grain, the depth of the grain determines the roughness of the cutting surface, the shallower the grain, the cutting section is smooth. Roughness not only affects the appearance of the edge, but also affects the friction characteristics. In most cases, it is necessary to reduce the roughness as much as possible, so the shallower the grain, the higher the cutting quality.
When cutting thick plates at high speed, molten metal does not appear in the cut below the vertical laser beam, but will be sprayed behind the laser beam. As a result, curved lines formed at the cutting edge, which closely followed the moving laser beam. To correct this problem, lowering the feed rate at the end of the cutting process can greatly eliminate the formation of lines.
4, cutting width
The width of the cut generally does not affect the cutting quality, only when a special fine contour is formed inside the parts, the cutting width has an important impact, because the cutting width determines the fine small inner diameter of the contour, when the thickness of the plate increases, the cutting width also increases. So to ensure the same high precision, no matter how large the incision width, the workpiece in the processing area of the laser cutting machine should be constant.
The formation of burr is a very important factor in determining the quality of laser cutting, because the removal of burr requires additional work, so the severity and amount of burr can intuitively judge the quality of cutting.
If cutting heats the part sharply, it will deform. This is especially important in fine finishing, where the contours and connectors 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.
7. Material deposition
The laser cutter strikes a special layer of oily liquid on the surface of the workpiece before starting to melt the hole. During the cutting process, due to gasification and the various materials are not used, the customer uses wind to remove the cut, but upward or downward discharge will also deposit on the surface.
8. Depression and corrosion
Dents and corrosion have an adverse effect on the surface of the cut edge, affecting the appearance. They appear in cutting errors that should normally be avoided.
9. Heat affected area
In laser cutting, the area around the cut is heated. At the same time, the structure of the metal changes. For example, some metals harden. The heat affected zone refers to the depth of the area where the internal structure changes.