Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element – Having plastically flowable or deflectable end – e.g. – rivet,...
Patent
1996-05-29
1997-11-25
Lindsey, Rodney M.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element
Having plastically flowable or deflectable end, e.g., rivet,...
29509, 295241, 403274, 403359, F16B 700, F16B 1906
Patent
active
056904592
ABSTRACT:
An assembly for forming a joint includes a stud joined to a plate. The stud includes a shank portion and a stem portion which extends from one end of the shank portion. The stem portion has a multi-lobular configuration thereon which is formed from a plurality of rounded lobes, each pair of lobes being interconnected to each other by a rounded flute. The plate has an aperture therethrough which has a multi-lobular configuration thereon which corresponds in shape to the multi-lobular configuration of the stem portion. To form the joint, the stem portion is inserted through the aperture such that a portion of the stem portion extends beyond the upper surface of the plate. The extending portion is then riveted to the plate to cause the extending portion to deform and uniformly expand to form a bloom or head and to secure the stud to the plate. The stem portion expands within the aperture to fully fill the aperture when the extending portion is being deformed. The extending portion can be riveted to the plate by orbital riveting, by radial riveting or by direct blow riveting.
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Article entitled "Riveting without strain" reprinted from Tooling & Production Magazine, date unknown.
Buchmann Frank
Donovan Steve
Lindsey Rodney M.
Santos Robert G.
Textron Inc.
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