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With the development of science and technology, laser has gradually stepped into people's lives from a remote high-tech product. Laser technology has been widely used in industry, agriculture, military, astronomy, including our daily life.
Laser has good space control and time control. It has great freedom for material, shape, size and processing environment of the processing object. It is especially suitable for automatic processing. The combination of laser processing system and computer numerical control technology can form an efficient automatic processing equipment, which has become the key technology for enterprises to implement timely production, and has opened up broad prospects for high-quality, high-efficiency and low-cost processing and production. Hot processing and cold processing can be applied to metal and non-metal materials, such as cutting, drilling, grooving, marking, etc. Hot processing metal materials for welding, surface treatment, production of alloys, cutting are extremely beneficial. Cold processing is suitable for photochemistry deposition, laser rapid prototype technology, laser etching, doping and oxidation.
The material used in the laser manufacturing model is a liquid photosensitive resin which solidifies and changes into a solid material after absorbing the laser energy in the ultraviolet band. Program the model to be manufactured and enter it into the computer. The laser beam output from the laser is controlled by a computer light path system, so that it can be scanned and scribed on the model material. Wherever the laser beam passes, the original liquid material solidifies. Under the command of the computer, the laser beam scanned, solidified the photosensitive polymer layer by layer, accurately stacked into samples, and made a model. Therefore, using this method to make models, the speed is fast, and the models are exquisite. Laser rapid prototype technology has been widely used in aerospace, electronics, automobile and other industrial fields.
Laser cutting technology is widely used in the processing of metal and non-metal materials, which can greatly reduce processing time, reduce processing costs and improve the quality of the workpiece. Pulsed laser is suitable for metallic materials, and continuous laser is suitable for non-metallic materials. The latter is an important application field of laser cutting technology. However, the application of laser in the industrial field has limitations and shortcomings. For example, laser cutting of food and plywood is unsuccessful. The food is cut and burned, and the cost of cutting plywood is large. With the rapid development of laser industry, the related laser technology and laser products are becoming more and more mature. In the field of laser cutting machine, it shows that YAG solid laser cutting machine and CO2 laser cutting machine are both powerful, and optical fiber laser cutting machine is in the lead.
Laser beam irradiation on the material, it will be heated to melt, so that butted components are joined together, that is, welding. Laser welding, using a laser beam with less power than cutting metal, melts the material without gasification and becomes a continuous solid structure after cooling. Laser welding technology has the effect of dissolution purification. It can purify weld metal and is suitable for welding between the same and different metal materials. Due to the high energy density of laser, metal welding with high melting point, high reflectivity, high thermal conductivity and great difference in physical properties is particularly advantageous. Because laser welding does not require any solder, the possibility of contamination of the soldering assembly is eliminated. Laser beams can be aggregated by optical system into very fine diameter beams, in other words, laser can be used as very fine welding torches to do precision welding work. Laser welding and components will not be directly contacted, that is, it is non-contact welding. It can also weld the components far away from us, or it can also weld the components placed in the vacuum chamber. Because laser welding has these characteristics, it is especially popular in the microelectronics industry.
Advanced laser technology has opened up new doors for research in the frontier. As technology continues to advance, we will see more and more new applications appear. Laser technology has been applied to every aspect of our lives.
