Drawn Arc Stud Welding Machine is an extremely efficient method of attaching fasteners primarily to mild steel and stainless steel by utilizing a constant current DC power supply. In this welding process, a welding rectifier serves as an energy source and provides a continuous welding current. The welding time can be adjusted from 10 to 1500 milliseconds. When a weld is initiated, current begins to flow through the stud while the weld gun simultaneously lifts the stud to draw an arc, which melts the base of the stud and adjoining surface on the workpiece. Upon completion of the weld time, the gun plunges the stud back to the workpiece, resulting in a permanent bond as the molten material solidifies. The whole process takes less than one second.
During the welding process, a welding fillet is formed around the base of the stud, the dimension of which is predetermined by the ceramic ferrule. The ceramic ferrule concentrates the welding arc and forms a weld fillet around the stud base.
Uniform high welding quality
No additional material such as flux or filler necessary
High duty cycle
Elimination of operations such as drilling, riveting and manual arc welding