摘要:
A self-piercing tubular fastener (13) is applied to a workpiece (9, 11) by means of a setting die (1) which is formed with a radially inner cavity (17) and a radially outer cavity (5) surrounding the radially inner cavity such that a first part of the material displaced as the fastener (13) penetrates the workpiece flows into the radially inner cavity in the setting die whilst a second part of the displaced material flows into the radially outer cavity.
摘要:
A hollow self-lubricating thrust rivet or fastener is adapted to pivotably fasten first and second members to one another. The fastener is laminated on its outer surface with a self-lubricating or lubricious bearing material such as an organic polymer or plastic material. The bearing material provides the fastener with requisite lubricity to enable the members to rotate about the fastener without requiring application of a discrete lubricant to the interface of the fastener and the members. The fastener thus effectively combines the functions of a conventional fastener and a conventional bearing into a single unitary device. The fastener preferably includes an annular thrust portion laminated with the lubricious bearing material and adapted for placement between the members. The thrust portion effectively eliminates the need for installation of a discrete washer between the members.
摘要:
A fastener for use with a rotary peening flap to secure at least two overlapping strap portions together. The fastener includes a shaft for extending through apertures in the overlapping strap portions, a head adjoining one end of the shaft, and an elastic washer at the other end of the shaft. The head of the fastener forms an included edge angle of greater than approximately 90.degree. at the intersection of the bottom and side surfaces of the head. The fastener maintains the overlapping portions of the strap under compression to prevent peening debris form becoming lodged between the fastener and the strap and between the overlapping portions of the strap and to prevent slippage between the strap and the fastener and between the strap portions. The elastic washer has sufficient elasticity to maintain compression as the strap portions become substantially thinner over prolonged use. A peening flap incorporating the fastener is also disclosed, as is a hub assembly incorporating the peening flap and fastener.
摘要:
Fastening apparatus and method for forming a rivet-type fastener are disclosed for joining two pieces together that is particularly suitable for use in constructing a building. The fastening apparatus utilizes an actuating rod preferably driven by a hydraulic cylinder with the rod being inserted through a fastening section and holes in pieces to be fastened. A set of dies has one fixed and one pulled by the rod through the holes to form at least one rolled flange or two rolled flanges to form a hollow fastener that secures the pieces together. The rod is automatically returned to an extended position to be ready for the next operation. The fastener has a relatively large inside diameter in relation to the thicknesses of the pieces being fastened to avoid shear of the piece and prevent having the flange deform under load.
摘要:
A crimping tool, for crimping eyelets or deforming hollow, male rivet fasteners, having a plier-like configuration. Opposed jaws with handles and linkage for movement of the jaws towards and away from each other is provided whereby a metal fastener is deformed into a fastening position. One of the jaws, in one embodiment, carries a platen surface against which one end of the fastener abuts while the opposed jaw carries a pin forming member which is received in the hollow tubular portion of the fastener and which is subsequently deformed or cold formed to form a locking, retaining collar or flange. In another embodiment, the crimping tool is provided with a dual pin forming jaw and a dual eyelet or fastener may be acted upon in a single operation of the crimping tool.
摘要:
A wobble riveting machine in the housing or stand of which there is arranged a lengthwise movably mounted guide body. A driving shaft having an eccentric mechanism is mounted in such guide body. According to the invention the guide body possesses a spherically constructed cradle or rocker. A wobble body member which can be pivoted to all sides by the eccentric mechanism is mounted in the cradle. At least one rivet tool or set is guided for lengthwise movement at the wobble body member, the latter being supported at the guide body.