Nine standards for judging the cutting quality of laser cutting machines
Judging the cutting quality of laser cutting machines is a good way to intuitively determine the performance of laser cutting equipment. Here is a list of nine standards for judging the cutting quality of laser cutting machines, which can be used for reference by customers in choosing equipment and manufacturers. refer to.
Laser cutting section will form vertical lines, the depth of the lines determines the roughness of the cut surface Degree, the shallower the grain, the smoother the cut section. Roughness not only affects the appearance of the edges, but also the friction characteristics. In most cases, the roughness needs to be reduced as much as possible, so the shallower the grain, the higher the cutting quality.
If the thickness of the sheet metal exceeds 10mm, the verticality of the cutting edge is very important. When away from the focus, the laser beam becomes divergent, and the cut becomes wider toward the top or bottom depending on the position of the focus. The cutting edge deviates from the vertical line by a few hundredths of a millimeter. The more vertical the edge, the higher the cutting quality.
3. Cutting width
Generally speaking, the cutting width does not affect the cutting quality, only a special contour is formed inside the part When the thickness of the plate increases, the cutting width will also increase. Therefore, in order to ensure the same high accuracy, no matter how large the width of the incision is, the processing area of u200bu200bthe workpiece in the laser cutting machine should be constant.
When cutting thick plates at high speed, molten metal will not appear in the incision below the vertical laser beam , On the contrary, it will be ejected at the rear 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.
Decided when the burr is formed A very important factor affecting the quality of laser cutting, because the removal of burrs requires extra work, so the severity and amount of burrs can intuitively judge the quality of the cutting.
6. Material deposition
Before the laser cutting machine starts to melt and perforate, it first touches a layer of oil on the surface of the workpiece Special liquid. Vaporization and various, the material does not require the customer to use the wind to remove the incision, but the upward or downward discharge will also form a deposit on the surface.
7. Depression and corrosion
Depression and corrosion have an adverse effect on the surface of the cutting edge and affect the appearance. They appear in cutting errors that should generally be avoided.
8. Heat-affected zone
In laser cutting, the area near the incision is heated. At the same time, the structure of the metal changes. For example, some metals will harden. The heat-affected zone refers to the depth of the area where the internal structure changes.
If the cutting causes the part to heat up sharply, it will deform. This is especially important in fine machining, because the contours and connecting pieces here are usually only a few tenths of a millimeter wide. Controlling the laser power and using short laser pulses can reduce parts heating and avoid deformation.
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