大出力炭酸ガスレーザの熱源的研究(第 5 報) : 炭酸ガスレーザによる熱加工

概要

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The CO_2 laser was applied to a heat source for processing various materials such as welding, cutting and drilling. Conclusions obtained are summarized as follows : (1) Excellent fusion welding with narrow bead width and sufficient mechanical strength was performed by the CO_2 laser in case of a thin metal. The surface treatment, which enhanced the CO_2 laser beam absorptance of the metal, had no bad effect on the weld. (2) New cutting technique, "laser gas cutting", of which the cutting energy consisted of laser beam energy, chemical reaction energy such as an oxidation energy and dynamic energy of gas jet, was developed, and fine cutting with narrow kerf width and heat affected thin layer was accomplished. (3) Non-metallic material was easily heated by CO_2 laser beam because of its high beam absorptance and poor thermal conductivity. In case of an easily evaporizing material such as acryl, a deep hole with a small diameter could be obtained by using the self-focusing effect of the beam. In case of a brittle material such as glass, a fine crack formed ahead of the beam spot facillitated the cutting.
社団法人溶接学会の論文
1972-04-25