Stud welding with Capacitor Discharge

The basic principles of Stud welding   

There is a distance of approximately 0.9 mm between the flange and the object. An arc is formed whereby the rod and object materials melt. The compression of the welding gun forces the rod into the molten pool and a close connection is formed.

This type of welding is often applied to parts where the visible side should be damaged as little as possible. It should be used on materials with thicknesses of  0.5 mm and above. Stud welding (CD) is a form of arc welding where several capacitor batteries are discharged across an accurately calibrated tip of a welding rod. CD (Capacitive Discharge) welding rods are available in copper-plated steel, stainless steel, aluminium and brass (Ms63). When the tip of the welding rod (-) touches the object (+), the tip actually explodes and the atmosphere between the rod and object ionizes.