Patent ID: 11453044

Abstract:
A method for automated installation of a semi-tubular fastener rivet is provided. The method includes controlling a numerical control drilling and riveting machine having an upper head and a lower head, to control movement of a lower pressure bushing, to apply a clamping force to hold a workpiece against an upper pressure bushing. The method includes controlling an upper drill spindle on the upper head, to drill a rivet-receiving hole from an upper side of the workpiece and to countersink the rivet-receiving hole. The method includes controlling a lower drill spindle on the lower head, to countersink the rivet-receiving hole from a lower side of the workpiece. The method includes controlling movement of an upper anvil from a retracted position to an installation position, and controlling movement of a lower anvil, to apply an upset force to a tail portion of the semi-tubular fastener rivet installed in the rivet-receiving hole.