A semi-hollow punch rivet by which a joint is establishable. The rivet includes: a rivet head having a rivet shaft, which comprises a lateral surface, a rivet foot having a foot front surface is provided at an end of the rivet shaft facing away from the rivet head, the foot front surface is perpendicular to a longitudinal axis L.sub.A of the rivet shaft, and a bell-like shaft cavity extends into the rivet shaft beginning at the end facing away from the head. The shaft cavity is formed by: an inlet portion beginning at a radial inner side of the foot front surface and extending arc-shaped with an inlet radius R.sub.S in the direction of the rivet head, a linearly extending continuation portion into which the inlet portion transitions tangentially and which is arranged in an acute angle with respect to the lateral surface, and a final dome portion.

A device is disclosed for supplying swageable collars from a magazine to a swaging tool such that the collars may be affixed to the shanks of lockbolts in a series of application steps. The feeder device can be mounted on the nose assembly of a swaging tool so that collar feeding and swaging can be accomplished in a single-handed operation. The feeder device responds to contact pressure against a work surface during a collar placement maneuver to release a collar from a presentation position for normal swaging. Releasing pressure on the workpiece allows a lower assembly of the feeder device to lift the next collar available from a magazine into the presentation position for application to the next lockbolt shank in a series of lockbolts to be finished.

The invention relates to a method for screwing a locking ring (1) onto a threaded bolt (2), wherein a coupling device (6) for being threaded into the threaded bolt (2) is driven in rotation by a rotary drive (4), and wherein the locking ring (1) is then screwed onto the threaded bolt (2), which is fixed by the coupling device (6), by a locking ring holder (3) which is driven in rotation by the rotary drive (4). The invention likewise relates to a method for screwing a locking ring (1) comprising a fastening part (18a) and a tear-off part (18b) onto a threaded bolt (2), wherein a removal gripper (22) grips the tear-off part (18b) and removes the tear-off part (18b) after the tear-off part (18b) has been torn off. The invention further relates to a screwing apparatus for executing a method according to the invention.

The present invention relates to a nose assembly with integrated anvil and puller to assist in swaging a collar to a lockbolt type fastener. The nose assembly has a sidewall defining a hollow axially extending interior and an open terminal end, hollow axially extending interior having a first interior diameter, and an annular recess of a second interior diameter greater than the first interior diameter. A puller is slidably displaceable relative to the holder sidewall. The puller is configured with opposing sets of teeth for gripping a lockbolt pintail and to close grippingly on the lockbolt pintail when the puller is axially displaced relative to the holder sidewall sufficiently to draw a head portion of the puller at least partially out of the recess and into the first interior diameter length.

A hollow punch rivet is described having a flange and a rivet section. Furthermore, a method for the attachment of individual components to one another using a punch rivet is described, with at least one of the components being formed by a material of the composite material. The method includes the following steps: a) arrangement of the die button against one of the two components to be secured to one another, which are placed on one another, wherein the die button has a bore which is dimensioned to receive the rivet section, b) carrying out a relative movement of the punch rivet with the free end of the rivet section to the fore towards the components arranged on one another and in the direction of the die button, c) piercing of the components with the free end of the rivet section and introduction of the rivet section into the bore of the die button until the component contact surface comes into contact and the component adjacent to the flange, d) using a plunger in order to dilate the punch rivet at least locally and e) forming a rivet bead by reshaping the free end region of the rivet section.

A hollow punch rivet is described having a flange and a rivet section. Furthermore, a method for the attachment of individual components to one another using a punch rivet is described, with at least one of the components being formed by a material of the composite material. The method includes the following steps: a) arrangement of the die button against one of the two components to be secured to one another, which are placed on one another, wherein the die button has a bore which is dimensioned to receive the rivet section, b) carrying out a relative movement of the punch rivet with the free end of the rivet section to the fore towards the components arranged on one another and in the direction of the die button, c) piercing of the components with the free end of the rivet section and introduction of the rivet section into the bore of the die button until the component contact surface comes into contact and the component adjacent to the flange, d) using a plunger in order to dilate the punch rivet at least locally and e) forming a rivet bead by reshaping the free end region of the rivet section.

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 different material joining structure has: a first panel made of a first metal material; a second panel made of a second metal material that has a higher conductivity than that of the first panel, is different from the first metal material, and at least a part of which faces the first panel; and a rivet for joining the first panel and the second panel, wherein the rivet is made of the first material, and includes a head portion that is embedded in the second panel in a non-penetrating manner and a bottom portion that abuts on the first panel, and wherein a nugget portion as a joint portion is disposed between the first panel and the bottom portion, the nugget portion being formed by resistance welding the rivet to the first portion with the rivet disposed between the first panel and the second panel.

A different material joining structure has: a first panel made of a first metal material; a second panel made of a second metal material that has a higher conductivity than that of the first panel, is different from the first metal material, and at least a part of which faces the first panel; and a rivet for joining the first panel and the second panel, wherein the rivet is made of the first material, and includes a head portion that is embedded in the second panel in a non-penetrating manner and a bottom portion that abuts on the first panel, and wherein a nugget portion as a joint portion is disposed between the first panel and the bottom portion, the nugget portion being formed by resistance welding the rivet to the first portion with the rivet disposed between the first panel and the second panel.

A punch rivet for joining two workpieces, has a head and a shank. The shank is a hollow shank with a shank internal diameter (D3), a shank external diameter (D1) and a shank end face. On the shank end face is a ring cutting edge with the diameter (D4) that is smaller than the shank external diameter (D1) but greater than the shank internal diameter (D3). The ring cutting edge is radially spaced both from the shank external diameter (D1) and from the shank internal diameter (D3) by at least 20% of the radial shank wall thickness (M5). And the ratio D3/D1 of shank internal diameter D3 to shank external diameter D1 is smaller than 0.6.