Abstract: This invention provides a method of welding a cage and nut combination to a surface of a workpiece using a welding electrode as a holding and locating member for the cage and nut. The cage and nut are placed, up-side-down, in a recess formed in the welding tip of a lower electrode which is positioned vertically with its tip up. The workpiece backed by an opposing welding electrode are positioned above the electrode holding the inverted cage. The inverted cage and workpiece are pressed together along a vertical axis and electrically welded. The lower electrode with its recess serves to accurately locate the inverted cage with its weld material projections for uniform welding contact with the surface of the workpiece for more efficient welding setup and an improved welded bond between the cage, retaining a nut, and the workpiece.

Abstract: This invention provides a method of welding a cage and nut combination to a surface of a workpiece using a welding electrode as a holding and locating member for the cage and nut. The cage and nut are placed, upside-down, in a recess formed in the welding tip of a lower electrode which is positioned vertically with its tip up. The workpiece backed by an opposing welding electrode are positioned above the electrode holding the inverted cage. The inverted cage and workpiece are pressed together along a vertical axis and electrically welded. The lower electrode with its recess serves to accurately locate the inverted cage with its weld material projections for uniform welding contact with the surface of the workpiece for more efficient welding setup and an improved welded bond between the cage, retaining a nut, and the workpiece.

Abstract: This invention provides a method of welding a flange nut to a workpiece surface using an improved design of a welding electrode. The electrode comprises a parts-receiving recess adapted to receive a stem portion of the nut, while maintaining a clearance between the recess and the stem. This clearance allows electrical current to be directed toward the flange portion of the nut. As a result, electrical contact between the workpiece and projections underlying the flange is greatly improved, thereby produce higher quality spot welds and increasing the life of the electrode tip.

Abstract: A method and system for testing joints which join one member to another member are disclosed. The method and assembly are capable of non-destructively testing joints which join such members without damaging the members or the joints.