Stud welding is an arc welding process in which a fastener can be end-joined to a metal workpiece instantaneously. It is a complete fastening system, using a wide variety of fasteners with literally hundreds of uses -- each permanantly installed by one man, working on one side of the workpiece, in less than one second.
The fastener is manually or automatically inserted into the stud welder chuck.
The fastener is positioned and brought into firm contact with the work surface.
The fastener is welded in a fraction of a second. The weld develops full fastener strength instantaneously.
Arc Stud Welding is generally used to weld large diameter fasteners to rougher and thicker base metals. Arc studs may be almost any shape and there are literally hundreds, however, they must have one end of the fastener designed for Arc welding. Mild steel, and aluminum are applicable materials for Arc Stud Welding.
|1) A fastener and ceramic ferrule are firmly placed against the work surface under spring tension.||2) Upon triggering, the weld gun automatically lifts the fastener from the base metal and initiates a controlled electric arc which melts the end of the fastener and a portion of the base metal.||3) A ceramic arc shield concentrates the the heat and retains the molten material in the weld area for maximum weld strength and reliability.||4) At the precise moment the fastener and parent metal become molten, the fastener is automatically plunged into the work surface. The metal solidifies and a high quality fusion weld is completed.|
Capacitor Discharge (CD) Stud Welding is generally used to weld smaller diameter fasteners to thin base metals. Since the entire weld cycle is compelted in milliseconds, welds can be made without pronounced distortion, burn through, or reverse side discoloration. As long as one end of the fastener is designed for CD welding, CD studs can be manufactured in almost any shape.
|1) The fastener is placed against the workpiece. Most CD studs have a special tip which provides precise weld-time control, for consistent, automatic welds.||2) Weld gun is activated and stored energy is discharged through the fastener, melting the full diameter of its base and a portion of the parent material.||3) Spring-loading forces the fastener into the molten metal.||4) The fastener is held in place as the molten metal solidifies and instantly creates a high quality fusion weld.|