摘要:
A lock nut (10) having a plurality of sides (16) having a crimp radius (18) which is consistent with the radius of the threaded bore (14) in the lock nut (10). Preferably, the lock nut (10) is crimped using a three sided die (52), each die having a crimp radius (118) with relief angles (56). The relief angles (56) are provided at a desired angle to result in the desired amount of contact area between the lock nut (10) and the die (52). The device (40) includes a housing (42), and the housing (42) includes at one end (44) a threaded bore (46) which is configured to mount on a ram. An opposite end (48) of the housing (42) provides a tapered die section (50) in which the three sided die (52) is disposed. The three sided die (52) is engaged with a locking die base (66) which is movable within the housing (42).
摘要:
A threaded insert (10) which has a cutting edge (18) on its external surface (12). The cutting edge (18) is configured to punch (22) a hole (22) in a workpiece (24) while leaving a slug (26) intact, still connected to the workpiece structure (24). The cutting edge (18) is configured such that no backup die need be utilized to form the hole (22) in the workpiece (24). The threaded insert (10) includes an internal threaded portion (32), and a deformable side wall (34) which is configured to deform upon installation of the threaded insert (10), to form a blind-side bulb (36) against the workpiece (24), and against the slug (26). The threaded insert (10) is configured such that an installation tool (100) can be threaded (40) into the threaded insert (10), and then the installation tool can be used to cause the threaded insert (10) to pierce through the workpiece (24). Then, the installation tool is actuated (44) to cause the deformable side wall (34) of the threaded insert (10) to plastically deform and form the blind-side bulb (36).
摘要:
A tool (20) and method for installing collapsible inserts. The tool (20) includes a stabilizing handle (26) which is threaded onto a tool body (24). The tool body (24) is threaded onto a tool shaft (22). In use, a collapsible insert (34) is threaded onto the tool (20) and the insert (34) is positioned in a hole (102) in a workpiece (104). An actuating handle (38) of the tool (20) is then rotated, while holding the stabilizing handle (26), to cause the collapsible insert (34) to collapse, thereby installing the insert (34) relative to the workpiece (104). Once the insert (34) has been collapsed using the tool (20), the actuating handle (38) is rotated in the opposite direction, while holding the stabilizing handle (26), to disengage the tool (20) from the insert (34). Then, a hanger (106) is threadably inserted into the collapsed insert (34) and a threaded rod (124) is threaded into the hanger (106). Alternatively, the threaded rod (124) is directly threadably engaged with the collapsed insert (34), without need for a hanger (106).
摘要:
A drive system with full surface drive contact. The drive system tends to maximize the surface contact pattern or area at typical bit-recess reaction (drive) torque values, thereby tending to minimize bit-recess surface contact stresses, coating damage, recess ream and premature bit fatigue failure.
摘要:
Punch pins which have further extending lobes, and which are designed to punch sockets that have deeper flutes while not having lobes which extend further toward a center axis of the fastener. Using such a punch pin to form a socket in a fastener provides that the resulting socket has flutes which are deeper than they otherwise would be, without having to provide corresponding lobes which extend further toward the center axis of the socket. This extra deepness in the flutes helps to provide extra room for a coating to deposit.
摘要:
A lockbolt (100, 200, 300) which includes a head portion (102) and a shaft (104, 302) which extends from the head portion (102). The shaft (104) includes at least a portion which is threaded and has a multi-lobular profile. A collar (120, 304) is swageable onto the multi-lobular threaded portion (104), and thereafter the lobes (114) provide that the collar (120, 304) does not tend to vibrate loose from the threading. The fact that the section which has a multi-lobular profile is also threaded provides that the collar (120, 304) (or a conventional threaded nut) can be selectively rotatably removed and re-installed on the lockbolt (100, 200, 300). Before swaging, the collar (120, 304) may initially include a cylindrical bore (130), or a bore (130) which is multi-faceted, preferably generally corresponding to the profile of the multi-lobular portion of the lockbolt (100, 200, 300). The lockbolt (100, 200) may include a frangible pintail (106, 202), wherein the multi-lobular threaded portion is disposed between the head portion of the bolt and the frangible pintail. Alternatively, the lockbolt (300) maybe pintail-less. A tool (310) for swagging a collar (304) onto a pintail-less lockbolt (300) is also described.