Welders Home >> Ac Dc Welding

Ac Welding is an arc welding process where in coalescence is produced by heating the job with an electric arc struck between a job and the tungsten electrode. A shielding gas is a argon helium,nitrogen and used to stay away from atmospheric contamination of molten weld pool. A filler metal may be added, if required.



Principle:

This Ac Welding machine work on the principle of square wave electric arc generated between the work and tungsten electrode.

This Welding heats both electrode and work, only work fuses due to it's lower fusion temperature than tungsten electrode, square wave current helps in damaging oxide layer on work. A inert shielding gas protects both electrode and work from oxidation by atmospheric gases.