Apparatus and a method for alternately supplying different inert gases to a welding torch

摘要

The inventive apparatus for alternately supplying inert gases to a welding torch is provided with an electronic controller having control circuits allowing electric power from a power source to be supplied to a plurality of solenoids depending upon numerical values input through a key input device, in order to alternately supply different kinds of inert gases to a main body, and a gas mixer having a tubular member mounted between the solenoids in an axial direction and an opening/closing device inserted into the tubular member so as to move to and for within the tubular member to optionally open/close a first gas suction tube and a second gas suction tube by using magnetic force by the solenoids, whereby an excess welding voltage and a consumption of the inert gases are reduced and an accurate welding process is promptly obtained.