초록 ▼

A self-piercing blind fastener comprising a mandrel having an elongate cylindrical shell mounted on a stem of such mandrel and which extends co-axially about a central elongate axis of the blind fastener, the shell having a radially extending flange at one end and a tail-end portion at the opposite

A self-piercing blind fastener comprising a mandrel having an elongate cylindrical shell mounted on a stem of such mandrel and which extends co-axially about a central elongate axis of the blind fastener, the shell having a radially extending flange at one end and a tail-end portion at the opposite end for insertion through a workpiece, the mandrel further having a mandrel head in operative engagement with the tail-end of the fastener for transmitting a setting force thereto during setting of such fastener, the blind fastener further comprising a longitudinally extending indenting member extending co-axial with and away from the tail-end of the blind fastener, which indenting member having a cross sectional area less than the cross sectional area of the shell.

대표청구항 ▼

The invention claimed is: 1. A fastening system for inserting and setting a self piercing blind fastener in a workpiece formed of a plurality of metal sheets, said system comprising:a die for supporting the rear of a workpiece during insertion of said fastener;a combined insertion and setting tool,

The invention claimed is: 1. A fastening system for inserting and setting a self piercing blind fastener in a workpiece formed of a plurality of metal sheets, said system comprising:a die for supporting the rear of a workpiece during insertion of said fastener;a combined insertion and setting tool, which combined insertion and setting tool comprising a force application mechanism and an insertion member for engaging a shell of said blind fastener and for transmitting an insertion force thereto, a mandrel engaging member for engaging a mandrel stem of said fastener, said mandrel engaging member being displaceable relative to said insertion member for effecting relative displacement of said mandrel and said shell to effect setting of said blind rivet; anda displacement mechanism for effecting relative displacement of said die and said combined insertion and setting tool, wherein the die for supporting a workpiece comprises a selectively engageable workpiece engaging support member having a cylindrical fastener receiving bore extending therethrough, said bore having a generally uniform mid section of constant diameter and a throat portion adjacent an outer surface of said support member, which throat portion increases in diameter towards said outer surface.