ARC WELDING

Arc welding is non pressure fusion welding and with or without filler metal depending upon thickness of base plate.
PRINCIPLE OF ARC WELDING:
Arc is generated between anode +ve pole of DC and -ve pole of DC cathode. When these two poles are brought together and separated for a small distance(1.5 to 3 mm)and current flows through a path of ionized particles, called plasma and electric arc is formed.Heat is generated as the ions strike the cathode.Various arc weldings processes are:
-Carbon arc welding
-Flux shielded metal arc welding
-TIG(GTAW) welding
-MIG(GMAW) welding
-Submerged arc welding
-Electroslag welding
-Electrogas welding
-Plasma arc welding
Dear students first four processes are to be studied with making figures(sketch) available on my site.
As explained in the class that for every welding answer first write definition of welding and then type of welding and principle. Make figure and explain.