摘要:
A self-attaching fastener and panel assembly wherein the free open end of the tubular barrel portion is coined, collapsed axially, flattened and deformed radially inwardly and outwardly and axially against a panel surrounding the panel opening. The method of installation includes driving the free end of the tubular barrel portion against a substantially planar die surface, deforming an end portion radially, then collapsing an intermediate portion over the radially deformed end portion, flattening the end portion, substantially thickening the tubular barrel portion and forming an annular surface engaging and supporting the panel surrounding the opening. The die member includes an annular moat surrounding a central die post and a planar die surface extending generally perpendicular to the axis of the die button.
摘要:
Mechanically interlocking releasable fastener systems include a reinforced shape memory polymer for forming one of the interlocking components. The reinforced shape memory polymer includes a filler material in the form of a fiber and/or platelet. The filler can include an electrically conductive filler, a thermally conductive filler, a dielectric fillers, and mixtures thereof. Also disclosed herein are processes for using the releasable fastener systems.
摘要:
A method of hot riveting is described. A first step involves using a clamp to exert a clamping force upon a head of a rivet to maintain the rivet in a selected opening of a workpiece. A second step involves heating an opposed end of the rivet in preparation for shaping. A third step involves deforming the opposed end of the rivet to a desired shape with a hammer.
摘要:
A method of connecting a metallic bolt to a plastic work piece is shown and described. The object to provide a method which makes possible a reliable connection between metal workpieces on the one hand and plastic workpieces on the other hand is achieved in that a first plastic work piece and a metallic bolt are provided, and in that the bolt is pressed into a surface of the first plastic workpiece, the bolt being rotated during the pressing-in, and the rotational speed of the bolt being selected in such a way that the first plastic workpiece is plasticized, so that the bolt is anchored in the first plastic workpiece in a positive-locking manner after the rotation is stopped.
摘要:
A self-attaching fastener and panel assembly wherein the free end of the tubular barrel portion is coined and deformed axially and radially outwardly against a planar die face into an annular shape having a planar annular bearing surface supporting the panel and a flat end face. The die includes a central post and an annular planar die surface extending substantially perpendicular to the longitudinal axis of the die member. The method of installation includes coining and deforming the barrel portion axially and radially eliminating cracking of the barrel, frictional resistance and hoop-stress.
摘要:
A blind fastener installation tool which accomplishes the blind installation of a series of fasteners is described in detail in this specification. The blind fastener installation tool comprises a structural housing which features a means for securing a fastener installation assembly in position relative to said structural housing during the blind installation of a fastener; and a means for reciprocating said fastener installation assembly relative to said structural housing at the conclusion of a cyclic blowline-fed or clip-fed blind installation of a fastener. The blind fastener installation tool also comprises a fastener installation assembly comprising (1) a pull rod assembly comprising means for pulling a first portion of a fastener; (2) an annular, piston-actuated, direct action, piston-decoupled pull rod actuation assembly to translate the pull rod assembly relative to said fastener installation assembly when said fastener installation assembly is secured at a fastener installation assembly fastener installation position, thereby pulling said first portion of said fastener until blind installation of said fastener is complete; and (3) a nose assembly comprising (3a) a fastener receptacle for securing the position of a fastener relative to said nose assembly during blind installation of said fastener; and (3b) one or more optional pull rod translation dampening assemblies to smoothly and effectually dampen the sudden translation of said pull rod assembly after pintail break during blind installation of a pintail-break—type fastener. The blind fastener installation tool also comprises an optional fastener delivery assembly, said optional fastener delivery assembly constituting: (1) a clip-fed fastener delivery system; or (2) a blowline-fed fastener delivery system.
摘要:
A method and apparatus for forming rivet joints with a desired amount of clearance to allow pivotal motion of the parts interconnected by such joints. Parts to be riveted together are aligned with each other, and a rivet is placed into aligned holes. A parts clamp urges the parts and a preformed head of the rivet against a rivet support anvil to establish an initial condition. A parts support anvil is placed in a required position with respect to the rivet support anvil prior to formation of the second head on the opposite end of the rivet, to provide the desired amount of clearance. The parts support anvil is moved by pushing against a set of arched leaf springs to adjust their effective length, using a hydraulic motor controlled in response to an electrical signal from a transducer that measures movement of parts by the parts support anvil.
摘要:
A self-drilling anchor for use in a friable material comprises a body having an axis, a flanged rear end, a drilling front end and a generally cylindrical portion therebetween having an outer surface with a thread disposed thereon, wherein the body forks, beginning at a predetermined distance from the flanged rear end, into a first leg and a second leg, the first leg extending forwardly into a drilling tip and having a generally rearward facing shoulder angled obtusely outwardly with respect to the axis, wherein the body has an axial bore for receiving an elongate fastener, the axial bore extending substantially through the flanged end and the generally cylindrical portion and leading to the generally rearward facing shoulder, wherein the anchor has a drilling mode wherein the second leg nests behind the generally rearward facing shoulder of the first leg, and an anchoring mode wherein the legs are pivoted apart from one another.
摘要:
A method of attaching a clinch spacer to a panel including forming a clinch spacer having a body portion including an axial bore, an annular flange portion surrounding the bore and an annular barrel portion integral and coaxially aligned with the flange portion having a diameter less than the flange portion including an end face having an outer lip extending at an angle radially outwardly and axially from the end face; forming an opening in the panel; and driving the barrel portion through the opening in the panel against a die member having a generally V-shaped annular projecting lip which is driven against a second face of the panel, deforming the panel radially inwardly against the outer surface of the barrel portion and deforming the outer annular lip radially outwardly and axially against the panel, forming a secure installation.
摘要:
An apparatus for closing fasteners in media includes a plurality of fastener clinches, the plurality of fastener clinches being adapted for operable engagement with a plurality of fastener dispensers, and the plurality of fastener clinches including structure adapted to generally simultaneously close a plurality of fasteners discharged by the fastener dispensers. The apparatus also includes an actuation mechanism for moving the fastener clinches to contact and close the fasteners in the media, and a drive for powering the actuation mechanism.