Capacitor Discharge
What is capacitor discharge stud welding?
In this welding process, the energy stored in a capacitor battery is discharged through the ignition tip of the welding elements within the extremely short time of 1 - 3 ms (0.001 – 0.003 seconds). Auxiliary aids such as inert gas or ceramic ferrules are not required.
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| Stud tip is placed in contact with the workpiece. Electric arc is initiated | Ignited arc creates a thin fusion zone on stud and workpiece | Stud is forced into the molten pool. Material solidifies and stud is welded |
Where is capacitor discharge stud welding applied?
Owing to the low weld penetration of approx. 0.1 mm, this method is mainly used for stud welding on thin-walled sheet metals with a minimum thickness of 0.5 mm. No traces of welding such as pressure marks, discolouration or deformation are visible on the reverse side of sheet metals, even if the surface has been plastic-laminated or electroplated.
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