自動熔接機の貨車への應用

概要

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The practical use of the automatic welding method (union melt process) for the car constructions has been anticipated for several years, yet it has not met with much success owing to the various kinds of difficulties. After carrying out the preliminary experiments carefully in our shop, we succeeded in the application of this process for the center sill of a freight car. 1. The welding machine was of a thyratron controlled type and was built by ourselves. 2. The welding flux was prepared according to the result of the preliminary experiments. 3. The welding wire was a kind of "Sekiguchi Electrode Wire" which was chosen due to the special requirements on the quality of the electrode for this process. 4. The parent metal was of quality suityng the specifications. Based on the results of tests, the author's conclusions are as follows : 1. The microscopic investigations and the physical properties of this process can safely be extended to the whole construction of cars, if the parent metal is of reliable quality. 2. The welding speed can be made faster if the welding current is increased a little more. 3. The bead shall be straightened if the vibration of the welding head of the machine is eliminated and if a reel of electrode is used.
社団法人溶接学会の論文