等离子弧焊接和切割——原理（Plasma arc welding and cutting - principle）.docVIP

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等离子弧焊接和切割——原理（Plasma arc welding and cutting - principle）.doc

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等离子弧焊接和切割——原理（Plasma arc welding and cutting - principle） Plasma arc welding and cutting principle: (a) _ _ product information network of small and medium enterprises of small and medium-sized enterprises by the news and news released by the media focus on home network / Journal of business people, business location information technology: Internet financial news network by you plasma product information Wuhan Jin Jia shares CNC Technology Co., welding and cutting principle: (a) plasma arc welding and cutting principle: (a) source: network news: 2011-07-19 10:37: Wuhan Jin Jia CNC Plasma arc welding and cutting - principle (1) -- Wuhan CNC CNC technology: 1.1 plasma arc generation: (1) the concept of plasma arc: Free arc: arc, such as arc produced by general arc welding, without external confinement. Plasma arc: the arc of an isolated column is compressed by the influence of external restraint. The gas free arc zone has not yet been fully ionized, energy is not concentrated, and the gas plasma arc arc zone completely ionized, high concentration of energy, energy density, up to 105~106W/cm2, the arc temperature can be as high as 24000 ~ 5000K (free state argon tungsten arc welding, the highest temperature is 10000 ~ 20000K, energy density in the following 104W/cm2) can rapidly melting metal materials, can be used for welding and cutting. (2) the generation of plasma arc A higher voltage is added between the tungsten pole and the nozzle or between the tungsten pole and the workpiece, and the gas is ionized by the high frequency oscillation to form a free arc. The arc is formed by the following three compression functions. Mechanical compression effect (ARC) the arc passes through a water nozzle channel with a certain aperture, so that the arc section is restrained and can not extend freely. The hot compression effect when access to certain pressure and flow of argon or nitrogen, air flow evenly around the arc, the arc periphery by strong cooling, forced flow of ch