| 摘要 |
There is provided a self-piercing blind fastener, usually a blind rivet, 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. There is also disclosed a die for supporting a workpiece during the setting of this type of self-piercing blind fastener which has a bore for transmitting a passage therethrough of the fastener body and a throat portion for receiving a portion of the workpiece deformed by the piercing operation of this rivet. There is also provided a method of attaching such an elongate blind fastener to a workpiece and a fastening system for inserting and setting such type of self-piercing blind fastener.
|
