Laser cutting development course in our country

In 1963 successfully developed laser punching machine, punching machine, 1965 on drawing film and watch jewel bearing into actual use, after that have adopted the Co2 laser, nd glass laser, YAG laser punching on different materials, different parts used in automobile manufacturing industry began in 1976 laser cutting, systematically carried on the laser heat treatment since 1978 Yun research and industrial applications, and achieved good results. Since October 1982, laser processing are on & other> & throughout; To & other; Five-year & throughout; National science and technology key research topic. So far, our country in the laser drilling, laser roughen, leather punching, laser cutting, laser welding, laser marking, laser heat treatment, etc, there have been many successful examples of application of the laser alloying and laser cladding, laser preparation of new materials, laser 3 d printing into the practical phase.



in 1963 successfully developed laser punching machine





ultrashort xu chong doped titanium sapphire tunable laser research, and other fields have more advantages compared to the same. Currently, the main technology of this kind of laser physics, such as the coherence and spectrum for abroad Germany coconut, belarus Solar and other large companies. High power laser is toward the direction of high brightness, high beam quality.



Co2 laser cutting and punching, are the biggest application fields such purposes accounted for more than 70%. Co2 laser, although on the surface of the metal, high reflectivity, but due to its high output power and good beam quality, and has been widely applied. Commercialization of 2 ur_45kwco2 high-power laser has been used in Bridges, shipbuilding, construction machinery and atomic energy technology, etc. This kind of laser cutting thickness can reach more than 30 mm steel plate. Due to the high power l7AG laser, Co2 laser in the future the main developing direction is to improve the quality of the beam and conversion efficiency. In sheet metal laser processing, the material of the Co2 laser absorption rate is lower than optical fiber laser is at a disadvantage in the competition in the market place. But with the emergence of new technology of radial polarization, absorption rate has not only can make up for the deficiency of the Co2 laser materials, and fiber laser will be caught.



excimer laser is halogen gas and the mixture of rare gas as working medium of laser, including XeF ( 351nm,3. 5eV) 、XeCl( 308nm,4. OeV) 、KrF( 248 nrn, 5。 OeV) 、ArF( 193nm,6. 4eV) And F2 ( 157nm,7. 9eV) Raise, currently used for processing is given priority to with XeCl and KrF excimer laser.



excimer ablation material removal is the nature of light, it almost no heat affected zone, and using excimer, clean, chiseled incision. These characteristics make it very suitable for sub-micron range of micro processing. In addition, the short wavelength uv ( UV) Excimer radiation is absorbed by a lot of material to very easily make it to hard material ( Such as silicon and ceramic) Or the soft polymer processing can effectively. Uv excimer laser wavelength range is wide, this means that for any basically need processing of materials to be able to find an appropriate wavelength. Large multimode flat-topped beam excimer to large area of pattern making the beam shaping and mask technology, the machining efficiency is higher, and can get complicated three-dimensional pattern. Now with shorter wavelength laser, photon energy increase and concentrated smaller diameter, the processing is ultra-micronization model. the direction. Fiber laser with high conversion efficiency ( Can be as high as 20%) ； Life is long, The average trouble-free working time in more than 100000 hours) ； Can work under harsh environment ( Due to its cavity in the optical fiber inside, even in high shock, vibration, under the condition of high humidity, dust can be normal operation, and environment temperature allowed in a 20 ~ + r70 ℃) ； Without huge water cooling system, simply air cooling; Compact appearance, small size, There was only one dictionary size) fiber laser module volume ； Easy system integration, etc. Currently used in a variety of large, traditional laser ( With ordinary laser processing and marking using our fleet and YAG laser) In so many areas, or is this new type of high efficiency, long life, small volume, high power fiber laser.



at present, the continuous wave output power of single fiber laser, from best class to million kilowatt class development, on the premise of the beam quality unchanged, greatly increasing the output power of single fiber laser, and it will be the development of high power fiber laser is one of the main research content. Estimated by doped fiber, more advanced design and use higher power pump sources are used, the single fiber output will reach million watts. In addition, based on the seed laser oscillator amplifier M ( ) PA pulsed fiber laser, the high beam quality, the low power laser as a seed source, double cladding fiber as amplifier, easy to obtain high average power, high pulse laser output pulse energy, also a hot research topic at present. Industrial application from a low power optical fiber laser marking, engraving, 10 watts, hundreds) To a higher power of metal and ceramic cutting, welding, etc ( Kw) to all class , in the automotive industry and shipping industry, the structure is compact, practical and convenient high power fiber laser has a huge market potential