Newfrey Lcc

Geoffrey Weeks

Daniel Vigliotti

Eymard J Chitty

Brian Taylor

Peter C Thomas

Darren Hull

Guy Jackson

Steven Victor Jones

Stephen Godwin

Steve Godwin

A method of monitoring the setting operation for a blind fastener comprising the step of measuring, as a function of time, an electronic signal indicative of the load being applied to the fastener during the setting operation and, from which, determining a mandrel entry load and associated mandrel entry time from this measured signal and an associated setting time, subsequently determining the time difference between the mandrel entry time and the setting time and comparing this time difference against a predetermined reference time difference associated with that particular fastener type to determine whether the set fastener complies with predetermined acceptable setting procedures.

Method and apparatus for monitoring blind fastener setting

A rivet monitoring system is provided which has a micro-strain or micro fluid pressure sensor that measures strains or pressures within a tool component. These measured signals are compared to a number of tolerance bands formed about median strain or pressure versus time curve. Various techniques are provided to analyze the measured data with respect to the tolerance bands to determine if a particular rivet set is acceptable.

Rivet monitoring system

The present invention is directed to a blind fastener, usually a blind rivet, () comprising a mandrel () and an elongate cylindrical body () mounted on a stem () of such mandrel so as to extend co-axially about a central axis A of such blind rivet, the body () having a flange () at one end and a tail end () at an axially opposed end, for insertion through a hole in a workpiece, the mandrel having a mandrel head () in operative engagement with this tail end () for transmitting force thereto during setting of such fastener, wherein the body () has two different external diameters (d, D) and a radially extending shoulder () therebetween such that the external diameter (D) of the body adjacent to the flange () is greater than the external diameter (d) of the body adjacent to the tail end, wherein the body between this shoulder () and the flange is at least partially encased in a resilient, shock absorbing material ().

Blind fastener

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Burton-upon-Trent, United Kingdom

Geoffrey Weeks