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The principle and application of laser cutting machine
May 07, 2018


Laser cutting is currently the most widely used laser processing technology in various countries. In many fields in foreign countries, for example, automobile manufacturing and machine tool manufacturing use laser cutting to process sheet metal parts. As the quality of high-power laser beams continues to increase, the range of laser cutting processing objects will be more extensive, including almost all metal and non-metallic materials. For example, it is possible to use a laser to cut three-dimensional parts with complicated shapes, such as high hardness, high brittleness, and high melting point, which is also the advantage of laser cutting. Currently, there are two main types of companies that choose laser cutting systems: One is large and medium-sized manufacturing companies. The products produced by these companies require a large number of sheets to be cut and cut, and they have strong economic and technical strength. They are collectively referred to as processing stations and undertake laser processing business exclusively. They do not have their own leading products. Its existence can meet the needs of some small and medium-sized enterprises on the one hand, and on the other hand it will bring about the role of propaganda and demonstration of laser cutting technology. Several key technologies of laser cutting are integrated technologies of optical, mechanical and electrical integration. The parameters of the laser beam, the performance and accuracy of the machine and the numerical control system all directly affect the efficiency and quality of the laser cutting. The accuracy, efficiency, and quality of laser cutting vary with different parameters such as cutting power, speed, frequency, material thickness, and material, so the operator's rich experience is especially important.

The principle of laser cutting:

  Laser cutting involves the use of a high-power density spot formed by focusing the laser beam, rapidly heating the material to vaporization temperature, evaporating to form a small hole, and then moving the beam and material relative to each other to obtain a narrow continuous slit.

  By combining with CNC machine tools, computer aided design and assisted manufacturing (CAD/CAM) software, laser cutting has infinite profiling cutting capabilities, and the cutting trajectory is easily modified. By designing in advance in the computer, the whole board of various complicated parts can be cut in a row, which can not only save materials, but also can achieve simultaneous automation of multiple parts cutting, and can even achieve automatic laser cutting of three-dimensional space curves.

    After the laser beam is focused on the material, the light energy is converted into heat energy, so that the temperature of the material to be cut rises rapidly, and then it is melted or vaporized. At the same time, the gas stream coaxial with the beam is ejected from the nozzle, blowing the melted or vaporized material away from the bottom of the cut. With the relative movement of the laser and the material being cut, the incisions are formed on the cut material so that the avenue is cut. If the blown gas and the material being cut produce an exothermic reaction, this reaction will provide the additional heat source needed for cutting. The gas flow also cools the cut surface, reducing the thermal shadow area and ensuring that the focusing lens is not contaminated.

Field of application

 Laser cutting machines are commonly called laser cutting machines and can cut metal, various non-metal sheets and pipes. Particularly suitable for cutting stainless steel, iron, aluminum, ceramic, silicon, diamond, ceramic, glass and other materials.

 Widely used in sheet metal, metal products, steel structures, precision machinery, auto parts, glasses, jewelry, nameplates, advertising, handicrafts, electronics, toys, packaging and other industries.

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