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How should the cutting quality method of the cutting machine be tested?

by:VENTECH     2022-03-03

The quality of the light cutting machine mainly depends on its cutting quality, which is a direct way to inspect the quality of the equipment. For new customers, when purchasing equipment, they will ask to see the laser cutting machine proofing first. In addition to the cutting speed of the equipment, the proofing depends on the cutting quality of the sample. Then how to look at the cutting quality and what aspects should be paid attention to?

1. Smooth cutting, no streaks, and no brittle fracture;

When the metal laser cutting machine cuts thick plates at high speed, the molten metal will not appear in the cut below the vertical laser beam, but will spray out 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.

2. The slit width is narrow, which is mainly related to the diameter of the laser beam spot;

Generally speaking, the cutting width of the metal laser cutting machine does not affect the cutting quality. The cutting width has an important effect only when a particularly precise contour is formed inside the part. This is because the cutting width determines the small inner warp of the contour. When the thickness of the sheet is When increasing, the cutting width also increases. 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.

3. Good cutting seam verticality and small heat-affected zone;

Under normal circumstances, metal laser cutting machines mainly focus on the processing of materials below 5mm. The verticality of the section may not be the main evaluation factor, but for high-power laser cutting, when the thickness of the processed material 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.

4. No material burns, no molten layer is formed, no large slag;

The dross of the metal laser CNC cutting machine is mainly reflected in the deposition and section burrs. The material deposition is because the laser cutting first encounters a layer of oily special liquid on the surface of the workpiece before starting to melt and perforate. Vaporized and various materials do not need the customer to use the wind to remove the cuts, but the upward or downward discharge will also form deposits on the surface. The formation of burrs is a very important factor that determines the quality of laser cutting. Because the removal of burrs requires extra work, the severity and amount of burrs can intuitively judge the quality of the cutting.

5. Roughness

Laser cutting section will form vertical lines. The depth of the lines determines the roughness of the cut surface. The shallower the lines, the smoother the cut section. Roughness not only affects the appearance of the edge, but also affects the friction characteristics. In most cases, it is necessary to minimize the roughness, so the shallower the texture, the higher the cutting quality.

6. Material deposition

Before the laser cutting machine starts to melt and perforate, it first encounters a layer of special oily liquid on the surface of the workpiece. During the cutting process, due to gasification and various materials are not used, the customer uses 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. Deformation

If the part heats up sharply by cutting, it will deform. This is particularly 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.

The cutting quality is an important indicator reflecting the quality of the laser cutting machine. For new customers, they generally require on-site proofing when purchasing equipment. In addition to the cutting speed of the equipment, proofing also depends on the cutting quality of the sample.

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