Article by jekky
Recent years, lasers have become foreign industrial machinery and processing industry in the important equipment, widely used in cutting, drilling, Korea hunger and heat treatment processes. Laser processing is not only easy to automate, and high economic efficiency.
Use lasers usually be processed according to the nature of the material, because different materials absorb different wavelengths suitable for the laser beam. Such as metal materials generally easy to absorb the laser beam wavelength of 1.06 m, while the plastic and ceramic composite materials are easier to absorb the laser beam wavelength of 10.6 m. Currently there are two commonly used laser, a carbon dioxide laser, the other is solid-state Nd – YAG laser.
Carbon dioxide laser is the most widely used lasers, the output power is 50 ~ 1500W, laser beam wavelength of 10.6 m, mainly used for cutting, drilling and welding. Use Laser Cutting At about the speed of 7.5m per minute under the cutting width of only 0.1 ~ 0.3mm, so, you can cut the “heat affected zone” to minimize, and were cut out of a clear outline, no burr. As the speed of laser drilling, and thus solve the cracking of the ceramic in the drilling of the problem, such as 0.6mm thick 1.3mm diameter ceramic drill blank each time only 0.3S. Some countries have been replaced with carbon dioxide laser beam welding, laser welding can be used as the electron beam did not have to be in a vacuum, which simplifies the process and reduce costs.
Solid state Nd – YAG laser into industrial applications, the time is relatively short, the output power is 10 ~ 400W, laser beam wavelength of 1.06 m, easily absorbed by metal material, currently used for low-power precision drilling and electronic industries in the sealing process and spot welding.
Japan’s Nissan Motor Co. steel surface by laser treatment to improve the gloss paint has been successful. This method is carried out in spray paint on the steel sheet prior to the surface with a laser beam etching process, is the steel plate surface diameter and depth of numerous tiny air evenly, and then to spray-paint treatment. This will not only improve the gloss, and paint is not easy to fall off. Volkswagen combination of laser and robot systems, processing and automotive dashboard shell, use the carbon dioxide laser power of 400W, the annual savings of processing costs 600,000 U.S. dollars. German car company, another carbon dioxide laser welding galvanized steel, mechanical visual system to monitor the welding process, greatly improve the efficiency of production. U.S. General Motors vehicles with power 1000W laser cutting of carbon dioxide into the exhaust pipe, not only improve the efficacy of 30%, and the cutting quality. Ford Motor Company uses 1500W of carbon dioxide laser cutting of PVC composite material, high efficiency, but also automation. Italian Fiat production line installed in the laser – the robot combined system, not only saves labor, but also to speed up the production process.
Russia will also be used for laser machining industry. A factory with the laser used on locomotive traction engine block for quenching success. Laser can be processed within one second surface heated to 1000, rapid quenching, completely avoid the deformation of the machining area, and to parts of the surface wear resistance increased by 50%.
The laser processing of a number of advantages, some countries also to develop new Laser processing machine Such as Japan and the United States created a laser machine. With the development of science and technology, laser applications in industry will be more extensive.
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