| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low-swage load fastening system for installing a swage-type fastener. <P>SOLUTION: A fastener has a pin member having an elongated pin shank. An enlarged head at one end of the pin engages one side of a workpiece. A grooved pin portion extends past the opposite side of the workpiece. A collar includes a shank portion adapted to be swaged into pin lock grooves in response to a relative axial swage load applied by an installation tool. The collar is used in an as-headed condition and does not require thermal processing yet provides an optimum balance of reduced collar shank wall thickness and hardness, whereby the swage load is minimized. A low-swage load thread form for the lock grooves of the pin is also provided. A small radius and relatively short pull portion, installation tool improvements, and methods of using them are also disclosed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
