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一、前言激光技术是光学、机械和电子技术的复合学科,近年来发展很快。激光加工作为激光技术的应用在上海机电行业已引起重视,并取得了一些成绩。由于激光加工时间极短、热量无法传到工件内部,故零件变形小。当改变功率密度对,可进行不同的加工,现将其特点归纳如下: (1)平行性好,且为单色光的聚束,故能获得10~7～10~9W/cm~2的高功率密度,可加工高熔点、耐热、硬脆性等特殊材料。加工时间短,对工件的热影响小,并可通过透明体对材料进行加工。 (2)采用非接触式加工不会引起工具的损耗,也不会污染环境。 (3)由于在大气中进行加工,可自由地选用介质气体。
I. Introduction Laser technology is a complex discipline of optics, mechanics and electronics. It has developed rapidly in recent years. Laser processing as the application of laser technology in Shanghai Mechanical and Electrical Industry has attracted attention, and achieved some results. As the laser processing time is very short, the heat can not be passed to the workpiece, so the deformation of small parts. When changing the power density, can be processed in different ways, the characteristics are summarized as follows: (1) good parallelism, and the monochromatic light beam, it can get 10 ~ 7 ~ 10 ~ 9W / cm ~ 2 High-power density, Machinable high melting point, heat-resistant, hard brittle and other special materials. Short processing time, thermal effects on the workpiece is small, and the material can be processed through the transparent body. (2) The use of non-contact processing will not cause the loss of tools, it will not pollute the environment. (3) Due to the processing in the atmosphere, it is free to use the medium gas.