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laser cutting
Laser cutting is a technology that uses a laser to cut materials, and is typically used for industrial manufacturing applications, but is also starting to be used by schools, small businesses, and hobbyists. Laser cutting works by directing the output of a high-power laser most commonly through optics. The laser optics and CNC (computer numerical control) are used to direct the material or the laser beam generated. A typical commercial laser for cutting materials would involve a motion control system to follow a CNC or G-code of the pattern to be cut onto the material. The focused laser beam is directed at the material, which then either melts, burns, vaporizes away, or is blown away by a jet of gas,〔Oberg, p. 1447.〕 leaving an edge with a high-quality surface finish. Industrial laser cutters are used to cut flat-sheet material as well as structural and piping materials.
== History ==
In 1965, the first production laser cutting machine was used to drill holes in diamond dies. This machine was made by the Western Electric Engineering Research Center. In 1967, the British pioneered laser-assisted oxygen jet cutting for metals.〔The early days of laser cutting, par P. A. Hilton, 11th Nordic Conference in Laser Processing of Materials, Lappeenranta, Finland, August 20–22, 2007, http://www.twi-global.com/technical-knowledge/published-papers/the-early-days-of-laser-cutting-august-2007〕 In the early 1970s, this technology was put into production to cut titanium for aerospace applications. At the same time CO2 lasers were adapted to cut non-metals, such as textiles, because, at the time, CO2 lasers were not powerful enough to overcome the thermal conductivity of metals.〔CHEO, P. K. "Chapter 2: CO2 Lasers." UC Berkeley. UC Berkeley, n.d. Web. 14 Jan. 2015.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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