1. The stud gun is positioned over the base material and the main gun spring is partially compressed.
2. The trigger is pressed and the stud lifts off the base, drawing an arc. The arc melts the end of the weld stud and the base material below. The arc shield (ferrule) concentrates the heat below the weld stud and contains the molten metal within the weld zone.
3. The main spring plunges the weld stud down into the molten pool of metal in the base material. The cycle is completed in less than a second and the resulting weld bond develops the full strength of the fastener in the weld zone.
4. The weld gun is withdrawn from the weld stud, leaving the ferrule. The ferrule is broken away and discarded.
Click Here to Learn the Differences between Capacitative Discharge and Arc Welding.