Avdel Limited

Avdel Systems Limited

Avdel Systems Limited, a British Company

Jonathan L Brewer

Keith Denham

Glenn Stride

Raymond D Lacey

Neil J Sherry

A removable rivet which includes a shank and a preformed head located at at least one end of the shank, the shank being insertable through workpieces and being capable of being permanently deformed to rivet the workpieces together. The rivet includes an annular groove at the junction of the shank and the head, the annular groove extending radially inwardly of the diameter of the shank, thereby to facilitate separation of the head from the shank when a drill of diameter substantially equal to that of the shank is applied to the head of an installed rivet co-axially with the shank until the drill meets the annular groove; an annular rim carried by the head of the rivet for cooperating with a drill, thereby to locate the drill co-axially with the annular groove; and abutment faces carried by the head of the rivet for engaging dogs of a non-rotating sleeve of the drilling apparatus thereby to prevent rotation of the rivet under the influence of the rotating drill.

Removable rivet and method of removing the head from the shank of the

For use in a robotically operated workstation, apparatus for installing fasteners, for example tubular blind rivets, comprises a pneumatically operated fastener installation tool 16. The tool 16 has a part in the form of a headed mandrel 22 which is loaded with and carries a finite supply of the fasteners, a gripping and pulling actuator 26 and a nose assembly 21 which provides an abutment 18 for supporting successive rivets while the mandrel is pulled to draw its head through and set the rivet. For reloading the tool with further fasteners, after use, the apparatus includes a nest 96b for detaching and receiving the mandrel 22, together with the nose assembly 21, from the actuator 26, and a similar nest 96a provided with another nose assembly and another mandrel fully loaded with fasteners which it presents and attaches to the actuator 26. An indexing table 110 interchanges the nests 96a, and 96b between a station for reception and presentation of mandrels with nose assemblies, and a reloading station at which further fasteners are loaded on to a mandrel by feeding and transfer means 150. An alternative or supplementary reloading system includes a nest 90 for reception of a used mandrel and nose assembly from the tool 16, and at least one other nest 91 containing another nose assembly and a mandrel carrying a full load of fasteners for presentation to a tool actuator from which the mandrel and nose assembly have been removed.

Apparatus for installing fasteners

Apparatus for automatically installing blind rivets includes structure for automatically feeding new rivets one at a time to the front of the rivet installation head. Each rivet is supported in the appropriate position by a pair of support fingers (36,36) whilst the installation head (19) advances towards the rivet. The rivet feeding structure is provided with rivet guiding fingers (51,51) which guide the rivet stem (41) into the approaching anvil aperture (48) in the installation head. As the installation head continues to advance, it pushes out of the way first the guiding fingers (51,51) and then the support fingers (36,36) so that the rivet can reach the workpiece and be installed in it.

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Dunstable, United Kingdom

Jonathan L Brewer