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PRELIMINARY ANALYSIS AND CONCOMITANT LASER WELDING METHODS AND FIBRE LASERS WITH APPLICATION OF PRESELECTED WIDTH OF SPECTRAL BANDS TO BYPASS ELECTRONIC METAL/ALLOY VAPOUR TRANSITION SPECTRUM
PRELIMINARY ANALYSIS AND CONCOMITANT LASER WELDING METHODS AND FIBRE LASERS WITH APPLICATION OF PRESELECTED WIDTH OF SPECTRAL BANDS TO BYPASS ELECTRONIC METAL/ALLOY VAPOUR TRANSITION SPECTRUM
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机译:光谱带预选宽度在旁路金属/合金蒸气相变谱分析中的初步分析及相应的激光焊接方法和光纤激光器
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摘要
FIELD: metallurgy.;SUBSTANCE: invention relates to a method of preliminary selection of parameters of welding of metals/alloys irrespective of spectral properties of shielding gas, to method of creation of welding seam of metal/alloy in workpiece irrespective of spectrum of protective gas and narrow-band fibre laser. Electron transition of metal/alloy vapour is determined by analysing the radiation spectrum of the metal/alloy welding process using a broadband power source and selection of laser wavelength and line width outside electron/metal alloy electronic transition spectrum. Laser comprises a fibre Bragg grating to obtain output radiation in a given narrow spectral band corresponding to the width of the spectral band, which differs from the electronic transition spectrum of metal/alloy vapour, active fibre capable of suppressing non-linearities, and laser diodes made with possibility of active fibre pumping so that it can generate laser radiation with narrow spectral band.;EFFECT: technical result of invention consists in fact that pre-selected width of spectral bands, which bypass spectrum of electronic transition of metal/alloy vapour, enables to obtain welding seam practically without deposits, that is unpainted seam.;13 cl, 12 dwg
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