Views: 27 Author: Site Editor Publish Time: 08-04-2021 Origin: Site
With the wide application of laser cutting machines in various industries, the cutting quality of laser cutting machines is getting more and more attention. The quality of the laser cutting machine mainly depends on its cutting quality, which is the most direct way to check the quality of the laser cutting machine. So how to check the cutting quality of the laser cutting machine? How do you look at the cutting quality? What aspects should be paid attention to? Let's give you a detailed introduction to Leapion laser below.
The laser cutting section will form a vertical line. The texture depth of the cutting surface is related to the roughness of the cutting surface. The shallower the line, the smoother the cutting surface. 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 lighter the texture, the higher the cut quality.
The surface roughness of laser cutting mainly depends on the following three aspects:
1) Inherent parameters of the cutting system, such as spot mode, focal length, etc.; adjustable process parameters during the cutting process, such as power, cutting speed, auxiliary gas type and pressure, etc.;
2) The physical parameters of the processed material, such as the absorption rate of the laser, the melting point, the viscosity coefficient of the molten metal oxide, and the surface tension of the metal oxide.
3) In addition, the thickness of the processed part also has a great influence on the surface quality of laser cutting. Relatively speaking, the smaller the thickness of the metal workpiece, the higher the cut surface roughness level.
If the thickness of the sheet exceeds 10mm, the verticality of the cutting edge is very important. Far away from the focal point, the laser beam becomes divergent, and according to the position of the focal point, it cuts to the top or bottom of variable width. The cutting edge is a few millimeters away from the vertical line. The more vertical the edge, the higher the cutting quality.
The width of the cut generally does not affect the cutting quality, only a special precision contour is formed inside the part, and the cutting width is very important. This is because the cutting width determines the minimum profile. When the plate thickness increases, the cutting width also increases. Therefore, to ensure the same high precision, no matter how large the cutting width is, the workpiece in the laser cutting machine processing area should be constant.
Cutting thick plates at high speed, the molten metal does not appear in the vertical laser beam below the incision, but is ejected on the side of the laser beam. As a result, a curve is formed on the cutting edge, and the laser beam closely follows these lines. To correct this problem, the feed rate can be reduced at the end of the cutting process.
The formation of burrs is a very important factor in determining the quality of laser cutting. Because the removal of burrs requires extra work, the number of burrs is serious, and how much can directly determine the quality of the cut.
The laser cutting machine coats the surface of the workpiece with a special liquid oil before melting and perforating. Gasification and various materials, the materials do not need to be blown and cut, and they can be discharged upward or downward to form deposits on the surface.
In laser cutting, the area near the cut is heated. At the same time, the structure of the metal changes. For example, some metals can be hardened. The heat-affected zone refers to the depth of the area changed by the internal structure.
As a thermal cutting processing application equipment, a metal laser cutting machine is bound to cause thermal effects on metal materials during use. Its manifestations mainly include three aspects: heat-affected area; depression and corrosion; material deformation.
Sagging and corrosion have an adverse effect on the surface of the cutting edge and affect the appearance. They appear in cutting errors that should normally be avoided.
If the cutting heats the part, it will deform. This is especially important in fine machining, because profiles and connectors are usually only a few millimeters wide. Controlling the laser power and using short laser pulses can reduce parts heating and avoid deformation.
How to test and evaluate the cutting quality of laser cutting machines, we can draw conclusions from the above 9 points. If you want to know other questions about the laser cutting machine, please contact Leapion Laser directly. Leapion Laser has been focusing on the laser machine industry for more than 12 years, 7×24 hours online service, welcome to consult!
