簡易な自動電弧熔接の研究(I)

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A bar of an ordinary coated electrodes or a pair of them touching lengthwise to each other is laid parallel to the surface of steel plate at a suitable distance therefrom. When the electric arc is struck 5 between the electrode tip and the surface of plate, it continues in existence of itself until the electrode is cosumed and thus the welding is done automatically. Using such a simple method of automatic welding, some foundamental studies were done and the following results were obtained. (1) The distance between the core wire of electrode and the surface of steel plate for sucessful welding should be taken greater as the diameter of electrode increases. It should be also taken greater as the electric current applied is low. (2) The welding speed becomes greater as the intensity of current increases. To obtain the same welding speed for different sizes of electrodes the electric current should be cotrolled almost in the same proportion as the sectional area of the electrode wires. (3) The depth of penetration becomes greater as the electric current increases. Relating the arc voltage, the penetration becomes also greater as the voltage increases for a certain range of its intensity. Above this range of voltage the penetration becomes less owing to the marked spattering. (4) As the electric current increases, the breadth of bead becomes greater, while the height becomes less. (5) The rate of deposition of weld metal is far greater in the case of a pair electrodes as compared to that in the case of a single electrode. Regarding the rate of spattering the reverse is the case. (6) In the Vee butt welding the bevelling angle must be taken a little greater than in ordinary practise such as 100-120°. In the straight butt welding the gap between the plate edges must be taken greater as the electric current applied is lower to obtain perfect welding.
社団法人溶接学会の論文
1957-08-25

簡易な自動電弧熔接の研究(I)

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