Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1989-02-22
1991-03-12
Eley, Timothy V.
Metal working
Method of mechanical manufacture
Assembling or joining
29465, 29467, 29509, 29521, 295241, 295252, 29559, B21D 3903
Patent
active
049989430
ABSTRACT:
A method and apparatus for inserting fasteners which are press fit through aligned apertures in side-by-side workpieces. The apparatus includes a frame which is moveable relative to the side-by-side workpieces, the frame including a main frame and a subframe mounted on the main frame and moveable between the first and second positions. The subframe carrys tooling in the form of a drill and an upper ram. Also, mounted on the main frame are upper and lower spaced apart clamps which may be selectively moved into contact with upper and lower surfaces of upper and lower workpieces. The upper ram can be moved into contact with a headed fastener to force the shank of the fastener through aligned apertures drilled in the workpieces. A vibrating apparatus is associated with the upper ram and will be operated to hammer the upper ram while it is still being maintained in contact with the fastener after the fastener has been inserted into the workpieces to fully insert the fastener and relieve any stresses which may be present. Subsequently a collar may be swaged about the end of the fastener which projects through the workpieces.
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SME Technical Paper AD84-842, Robert B. Starnes, 1984, "Two Piece Fasteners and Installation Tooling".
SME Technical Paper AD86-686, Tom D. Stone, 1986, "No Tack Assembly of Wingspan and Spar Assemblies".
Birke James L.
Roberts Bradley M.
Chen Frances
Eley Timothy V.
Gemcor Engineering Corporation
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