Studwelding with Capacitor Discharge
The basic principles of Studwelding
Studwelding (CD) is a form of arc welding where several capacitor batteries are discharged across an accurate calibrated tip of the 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.
The distance between the flange and the object is approximately 0.9 mm. An arc is formed whereby the material of the rod and object melts. 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 on parts where the visible side is to be damaged as little as possible. To be used on a material thickness from 0.5 mm.
Stud welding applications are specifically found in: