Continuous curve countersink and rivet head structure for riveted work pieces
AssigneeThe Boeing Company
InventorJoseph G. Falcioni
Life of this patent
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Abstract
A fastening system having a continuously curved countersink section in an aperture through a plurality of workpieces, with a corresponding rivet having a continuously curved head portion substantially congruent to the continuously curved countersink. Rivets equipped with the continuously curved head surfaces taught herein, when mated with a continuously curved countersink, provide sufficient resistance to fastener pull through, cause cold working of the rivet upon insertion of the rivet into the aperture and impose an elastic load upon the workpiece and rivet, strengthening the joint.
Claims7
A process for riveting workpieces together comprising the steps of:
- forming an aperture through said workpieces said aperture including a bore and having a countersink adjacent a first surface of one of said workpieces, said countersink comprising a continuously curved surface extending from said first surface of said workpiece to said bore, said countersink having a concave portion extending from said first surface toward said bore and having a convex portion extending from said concave portion to said bore;
- placing a rivet blank to said bore and countersink;
- and
- upsetting said rivet blank into intimate contact with said countersink to form a structural fluid-tight joint.
Dependencies are inferred from the claim text.