| 摘要 |
There is provided a self-piercing blind fastener (10) , usually a blind rivet, comprising a mandrel having an elongate cylindrical shell (12) mounted on a stem (16) of such mandrel and which extends co-axially about a central elongate axis of the blind fastener (10), the shell (12) having a radially extending flange (14) at one end and a tail-end portion (20) at the opposite end for insertion through a workpiece, the mandrel further having a mandrel head (18) in operative engagement with the tail-end of the fastener (10) for transmitting a setting force thereto during setting of such fastener (10), the blind fastener (10) 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 (12). There is also disclosed a die (32) for supporting a workpiece during the setting of this type of self-piercing blind fastener which has a bore (36) for transmitting a passage therethrough of the fastener body and a throat portion (40) 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. <IMAGE> |
