Contract Connections Ltd is the leader in the specialised field of STUDWELDING in all forms.
We stock and supply all forms of fasteners and machines for all applications from Insulation Pins, Threaded 4mm-24mm Studs, Headed Concrete Anchors and Hand or Machine welded Refractory Anchors.
We also have machines available for sale or hire
CAPACITOR DISCHARGE STUDWELDING
Capacitor Discharge (CD) Stud Welding involves the same basic principles and metallurgical aspects as any other arc welding procedure. When the weld gun is activated, a special precision weld tip initiates a controlled electric arc from the welder capacitor bank which melts the end of the stud and a portion of the base metal. The stud is held in place as the molten metal solidifies instantly accomplishing a high quality fusion weld where the weld is stronger than the stud itself. CD Stud Welding is generally used to weld smaller diameter studs to thin base metals, especially where reverse side marking is not permissable. Since the entire weld cycle is completed in milliseconds, welds can be made to thin material without pronounced distortion, burn through or reverse side discolouration.
DRAWN ARC STUDWELDING
Arc stud welding is the most common type of stud welding used throughout New Zealand and the world. Arc stud welding also has the advantage of allowing studs to be fixed into inside angles for embedment plates.
Arc stud welding involves the same basic principles and metallurgical aspects as any other arc welding procedure. The weld gun lifts the stud a short distance from the base metal and initiates a controlled electric arc from the power source which melts the end of the stud and a portion of the base metal. The ceramic ferrule contains the molten metal into which the stud is thrust automatically and a high quality fusion weld is accomplished where the weld is stronger than the stud itself. Arc stud welding is generally used to weld larger diameter studs to thick base metals.