| 摘要 |
The method of connecting two workpiece sheets using a rivet, one sheet have a bore, and a counterbore which is frusto-conical and tapers forwardly between a side of the one sheet and the bore, and toward the bore that includes providing a metallic rivet having an axially extending shank defining an axis; providing the rivet with a head having an end face and a forwardly tapered frusto-conical section located forwardly of the end face; installing the shank in the bore and the head in the counterbore so that the periphery of the head end face is substantially flush with the work surface, the end face formed to provide a ring-shaped dome protruding axially in a rearward direction, the dome located to extend about the axis in substantially axial alignment with the outer surface of the shank; the rivet head provided with a peripheral side wall spaced radially from a side wall defined by the workpiece counterbore, and the space between the side walls having a volume A; the dome provided with a metallic volume B; and wherein volume B exceeds volume A, such that when the dome is flattened during rivet deformation, the rivet head side wall is radially expanded into volume A and pushes outwardly against the workpiece counterbore side wall to deform the latter radially outwardly. The rivet may be coated to provide barrier material between the rivet side wall and the workpiece counterbore side wall to fill interstices between the side wall after radially outward deforming of the workpiece counterbore side wall. Upon completion of the installation, to provide retained clamp-up of the sheets and protection of the connection from corrosion. |
