The Principle and Application of Laser Cutting(Depaneling)
Laser cutting is currently the most widely used laser processing technology in many foreign areas, for example, automobile manufacturing and machine tool manufacturing are used laser cutting sheet metal parts processing. With the continuous improvement of the beam quality of high-power lasers, the scope of laser cutting will be more extensive, including almost all of the metal and non-metallic materials. For example, you can use the laser on the high hardness, high brittleness, high melting point of the material shape complex three-dimensional parts cutting, which is the advantage of laser cutting. Now, the choice of laser cutting system enterprises are divided into two categories: one is large and medium-sized manufacturing enterprises, these enterprises produce a large number of products need to cut materials, cutting materials, and has strong economic and technological strength; Collectively referred to as the processing station, specifically to undertake external laser processing business, its own no leading products. It exists on the one hand to meet the needs of some small and medium enterprises processing, on the other hand in the early promotion and application of laser cutting technology to promote the role of demonstration. Laser cutting of several key technologies is light, machine, electrical integration of integrated technology. The parameters of the laser beam, the performance and accuracy of the machine and the numerical control system directly affect the efficiency and quality of the laser cutting. The accuracy, efficiency and quality of laser cutting are changed by different parameters such as cutting power, speed, frequency, material thickness and material, so the experience of the operator is particularly important.
The principle of laser cutting:
Laser cutting The high power density spot formed by laser beam focusing is used to rapidly heat the material to vaporization temperature, evaporate to form small holes, and then move the beam relative to the material to obtain a narrow continuous slit.
Through the combination of CNC machine tools, computer aided design and auxiliary manufacturing (CAD / CAM) software, laser cutting has unlimited imitation cutting ability, and easy to modify the cutting track. Through the pre-re-computer design, can be a large number of complex parts of the entire board of the cutting, not only save material, but also to achieve multi-part cutting at the same time fully automated operation, and even three-dimensional curve of the laser automatically cut.
After the laser is focused on the material, the light energy is converted into heat energy, so that the temperature of the material to be cut rapidly increases, and then melt or vaporize. At the same time, the airflow coaxial with the beam is ejected from the nozzle, and the melted or vaporized material is blown away from the bottom of the cut. With the laser and the relative movement of the material being cut and then cut the material to form a slit to cut the purpose of the road. If the blown gas and the cut material produce an exothermic reaction, the reaction will provide additional heat for the cutting. The airflow also has the effect of cooling the cut surface, reducing the thermal area and ensuring that the focusing lens is not contaminated.
Laser cutting Pcba Application areas
· Laser cutting machine commonly known as laser cutting machine, can be metal, a variety of non-metallic sheet metal, pipe cutting. Particularly suitable for stainless steel plate, iron, aluminum, ceramic, silicon, diamond, ceramics, glass and other materials cutting.
Widely used in sheet metal, metal products, steel structure, precision machinery, auto parts, glasses, jewelry, nameplate, advertising, handicrafts, electronics, toys, packaging and other industries.
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