A permanent faster is disclosed that utilizes an amorphous metal alloy for a retaining collar that is thermoplastically formed on install. The fastener includes a headed pin with locking grooves disposed thereon and a collar having a cylindrical inner wall. Head geometry may be any suitable shape; countersunk, counter bore, flat, etc., and may also be non-rotationally symmetric. The pin is disposed into aligned holes through the work pieces to be secured, and the collar is disposed about the pin over the locking grooves. The collar is heated into a thermoplastic region, something only allowed because of the amorphous metal material properties. The cylindrical wall of the collar is then radically compressed into the locking grooves to affix the collar on the pin. The amorphous metal properties allow use of a smaller fastener, and the thermoplastic region is reached at a temperature which does not damage composite work pieces.

A permanent faster is disclosed that utilizes an amorphous metal alloy for a retaining collar that is thermoplastically formed on install. The fastener includes a headed pin with locking grooves disposed thereon and a collar having a cylindrical inner wall. Head geometry may be any suitable shape; countersunk, counter bore, flat, etc., and may also be non-rotationally symmetric. The pin is disposed into aligned holes through the work pieces to be secured, and the collar is disposed about the pin over the locking grooves. The collar is heated into a thermoplastic region, something only allowed because of the amorphous metal material properties. The cylindrical wall of the collar is then radically compressed into the locking grooves to affix the collar on the pin. The amorphous metal properties allow use of a smaller fastener, and the thermoplastic region is reached at a temperature which does not damage composite work pieces.

A swage collar includes a shank, a flange, and a through bore. The shank includes a first end, a second end opposite the first end, an outside diameter, and an overall length between the first end and the second end. The flange extends from the first end of the shank. The through bore extends longitudinally through the shank from the first end of the shank to the second end of the shank. The through bore defines an inside diameter. The inside diameter and the outside diameter together define a wall thickness of the shank. The wall thickness of the shank is in a range of about 0.1 times the overall length of the shank to about 0.16 times the overall length of the shank.

A swage collar includes a shank, a flange, and a through bore. The shank includes a first end, a second end opposite the first end, an outside diameter, and an overall length between the first end and the second end. The flange extends from the first end of the shank. The through bore extends longitudinally through the shank from the first end of the shank to the second end of the shank. The through bore defines an inside diameter. The inside diameter and the outside diameter together define a wall thickness of the shank. The wall thickness of the shank is in a range of about 0.1 times the overall length of the shank to about 0.16 times the overall length of the shank.

A method of loading a rotating assembly of a turbocharger can include positioning a swage collar on an end portion of a turbocharger shaft that extends through a through bore of a compressor wheel; applying a pulling force to the end portion of the turbocharger shaft to achieve a desired amount of loading; deforming the swage collar to form a swaged collar fixed to the end portion of the turbocharger shaft; and releasing the pulling force wherein the swaged collar maintains the desired amount of loading.

A compressor wheel assembly of a turbocharger can include a compressor wheel that includes a through bore that extends from a base portion to a nose portion of the compressor wheel; a turbocharger shaft disposed in the through bore of the compressor wheel where the turbocharger shaft includes an end portion that extends axially away from the nose portion of the compressor wheel; and a swaged collar fixed to the end portion of the turbocharger shaft.

A fastener for thin panels has a shank with a deformable collar which works in conjunction with a configured mating panel to produce enhanced attachment forces, especially in the case of very thin panels. The mating panel is prepared with a round mounting hole with cross-cut openings or slots. The panel is stamped into a conical section in a preparatory step before installation to provide the fastener with snap-in engagement prior to final pressing. The fastener shank has an undercut located immediately below the collar which is snapped into the prepared hole. Once snapped in, a punch and flat anvil are used to press the deformable band of the fastener tightly against the prepared panel, capturing the panel rigidly between the deformable band and a base of the fastener. During pressing, the material of the fastener collar will also flow into the slots of the panel to prevent rotation.

A fastener for thin panels has a shank with a deformable collar which works in conjunction with a configured mating panel to produce enhanced attachment forces, especially in the case of very thin panels. The mating panel is prepared with a round mounting hole with cross-cut openings or slots. The panel is stamped into a conical section in a preparatory step before installation to provide the fastener with snap-in engagement prior to final pressing. The fastener shank has an undercut located immediately below the collar which is snapped into the prepared hole. Once snapped in, a punch and flat anvil are used to press the deformable band of the fastener tightly against the prepared panel, capturing the panel rigidly between the deformable band and a base of the fastener. During pressing, the material of the fastener collar will also flow into the slots of the panel to prevent rotation.

A battery pack assembly includes, among other things, an enclosure providing an interior area that houses one or more battery arrays, a bracket secured relative to the enclosure, and a bracket fastener having a stem extending longitudinally from a head along a longitudinal axis of the bracket fastener. The head is enlarged radially relative to the stem. The head is captured between the bracket and a surface of the enclosure. A battery pack securing method includes, among other things, securing a bracket relative to an enclosure of a battery pack to capture a head of a bracket fastener between the bracket and a surface of an enclosure. The bracket fastener has a stem that extends longitudinally from the head of the bracket fastener.

A battery pack assembly includes, among other things, an enclosure providing an interior area that houses one or more battery arrays, a bracket secured relative to the enclosure, and a bracket fastener having a stem extending longitudinally from a head along a longitudinal axis of the bracket fastener. The head is enlarged radially relative to the stem. The head is captured between the bracket and a surface of the enclosure. A battery pack securing method includes, among other things, securing a bracket relative to an enclosure of a battery pack to capture a head of a bracket fastener between the bracket and a surface of an enclosure. The bracket fastener has a stem that extends longitudinally from the head of the bracket fastener.