交流熔接電弧の安定度と熔接機特性との關係について

概要

論文の詳細を見る
The a.c. welder with high efficiency due to the small stray load loss is also preterable in the standpoint of arc stability. The instantenuous value of the leakage flux of the transformer is not zero at the instant of the zero value of the welding current due to the m. m. f. of the eddy current induced by the flux, so the secondary open voltage does not rises to its steady value instantenuously by the damping action of the leakage flux above mentioned. The voltage recovery at open circuit due to arc vanishing lags only about 1/2000 second by a new designed welder which has a efficiency value of 88% the time being approximately one third of a old type welder, whose efficiency value is 70%. The difference of the arc stability of the above mentioned two welders is observable clearly by hand welding when we use some electrodes, but is not observable when we use some other electrodes. The arc voltage and current wave forms by a elcctrode of poor arc stability are shown in Fig. 9,(a) and (b) being the case of the welder of quick and slow voltage recovery respectively. By a electrode of good arc stability, the arc voltage rises slowly after zero currnt intant (Fig. 1), due to the good conductivity of the arc part, so the lagging of the voltage recovery of the welder does not affect on the arc stability.
社団法人溶接学会の論文
1949-04-01