Abstract: A method is provided for precisely positioning and joining first and second sheet panels. A first hole is extruded in the first panel with an annular upstanding wall surrounding the first hole. The first hole has a diameter to fit closely over the locating pin of a support. A second hole is formed in the second panel and has a diameter to fit closely over the annular upstanding wall of the first panel. A bond is created between the first and second panels adjacent to the annular upstanding wall, so that the annular upstanding wall protects the locating pin from being fouled by the bonding material. The bond may be either an adhesive bond or an electric resistance weld or both an adhesive bond and an electric resistance weld and the annular upstanding wall acts as a dam to protect the locating pin from the adhesive or weld splatter.

Abstract: A method is provided for precisely positioning and joining first and second sheet panels. A first hole is extruded in the first panel with an annular upstanding wall surrounding the first hole. The first hole has a diameter to fit closely over the locating pin of a support. A second hole is formed in the second panel and has a diameter to fit closely over the annular upstanding wall of the first panel. A bond is created between the first and second panels adjacent to the annular upstanding wall, so that the annular upstanding wall protects the locating pin from being fouled by the bonding material. The bond may be either an adhesive bond or an electric resistance weld or both an adhesive bond and an electric resistance weld and the annular upstanding wall acts as a dam to protect the locating pin from the adhesive or weld splatter.

Abstract: A resistance spot welding system (10) for sequentially clamping a plurality of workpieces (20,22) at predetermined locations and welding the workpieces (20,22) substantially adjacent the locations, including a clamping element (24) able to be locked in a workpiece engaged position, at least one set of equalizing welding electrodes (28,30) for oppositely engaging the workpieces (20,22) so as to produce the weld (12) without deformation, a singular drive mechanism (14) including a cam coupled to the clamping element (24) and electrodes (28,30), and a singular source (16) for actuating the mechanism (14) and generating the welding and clamping forces.