A Fundamental Experiment of Arc Welding Process Superposing High Frecency Current

Abstract

In recent years, the tungsten inert gas arc welding process superposing the high frequency current is being, more and more, used. According to this, it comes to the problem how the noise in the wireless fields, which is generated by the high frequency current, is decreased.
In order to study fundamentally on this problem, we have set a vacuum tube high frequency oscillator. And we have investigatied the relations between the discharging voltage and frequency in the atomospheres of air and argon gas and in use of some shapes of electrode where the gap length is taken as parameter.
The works performed are summarrised as follows :
(1) Discharging voltage goes down to minimum value at about 800KC and 10MC in both atomospheres.
(2) Discharging voltage in the argon atomosphere is about a third of that in air.
(3) Remarcable influences of the rate of argon flow upon the discharging voltage are not found.