The quality of laser cutting machine mainly depends on its cutting quality, which is the most direct method to check the quality of laser cutting machine equipment. For new customers, when purchasing equipment, they will ask to check the laser cutting machine proofing first. In addition to the cutting speed of the equipment, proofing also depends on the cutting quality of the sample. How to judge the cutting quality of laser cutting machine? What aspects should we pay attention to? The following Redsail laser will provide you with a detailed introduction:
How to judge the cutting quality of laser cutting machine? The following nine criteria are essential:
1、 Roughness: The laser cutting part will form a vertical line, and the depth of the line determines the roughness of the cutting surface. The shallower the line, the smoother the cut plane. Roughness not only affects the appearance of edges, but also affects the friction characteristics. In most cases, it is necessary to minimize the roughness, so the shallower the grain, the higher the cutting quality.
2、 Perpendicularity: If the thickness of the sheet metal exceeds 10mm, the perpendicularity of the cutting edge is very important. When away from the focus, the laser beam becomes divergent, and the incision will be widened toward the top or bottom according to the location of the focus. The cutting edge deviates from the vertical line by several millimeters. The more vertical the edge is, the higher the cutting quality will be.
3、 Cutting width: Generally speaking, the cutting width will not affect the cutting quality. The cutting width plays an important role only when a particularly precise profile is formed inside the part. This is because the cutting width determines the minimum internal warpage of the profile. When the thickness of the sheet increases, the cutting width will also increase accordingly. Therefore, in order to ensure the same high accuracy, the processing area of the laser cutting machine should be kept constant no matter how large the cutting width is.
4、 Texture: When cutting thick plates at high speed, molten metal will not appear in the incision below the vertical laser beam, but will be ejected at the back of the laser beam. As a result, a curve is formed on the cutting edge, and the curve closely follows the moving laser beam. To correct this problem, reducing the feed speed at the end of the cutting process can greatly eliminate the formation of lines.
5、 Burr: It is a very important factor to determine the cutting quality of the laser cutting machine when burrs are formed. Because the removal of burrs requires extra work, the severity and quantity of burrs can directly judge the quality of laser cutting machine.
6、 Material deposition: before the laser cutting machine starts to melt and perforate, a layer of special oil containing liquid is touched on the surface of the workpiece. During the cutting process, due to gasification and non use of various materials, the customer uses wind to remove the incision, but the upward or downward discharge will also form sediment on the surface.
7、 Dents and corrosion: Dents and corrosion will adversely affect the surface of the cutting edge and affect the appearance. They occur in cutting errors that should normally be avoided.
8、 Heat affected area: In laser cutting, the area near the incision is heated. At the same time, the structure of metal changes. Some metals, for example, harden. The heat affected zone refers to the depth of the area where the internal structure changes.
9、 Deformation: if the laser cutting machine sharply cuts and heats the parts, it will deform; This is particularly important for fine machining, because the contours and connectors here are usually only a few tenths of a millimeter wide; Controlling the laser power and using short laser pulses can reduce the heating of parts and avoid deformation.