Development of Light Beam Welding Process

概要

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A light beam can be used as one of excellent welding energy sources to improve weld quality. In this report, in order to realize a practical use of a light beam welding process, investigations for improvement of concentration efficiency of the light beam and charactor of the high power lamp for special heat source were performed. As a result, the energy density of the light beam was able to reach a very high level never before obtained (2.6KW/cm^2 at 5KW lamp) by the successful utilization of the direct light concentration method with an elliptical reflector having an extremely small ratio of the focal distances, and by a lamp that tube structure and gas pressure were especially designed. Moreover, the necessary conditions on the energy density of the light beam as a heat source were clarified. By means of this process, it was possible to obtain good results as to the welding of sheet metal, such as mild and stainless steel, and the brazing of large size silver contactors, as compared with conventional welding processes. This newly developed welding process can be used widely as a useful method in practical.
大阪大学の論文