Abstract: A filament winding apparatus prevents a fiber bundle supplied to a liner from interfering with other fiber bundles and fiber supplying guides. First and second guide units include a plurality of fiber supplying guides arranged radially and extending and contracting in a direction approximately perpendicular to a liner central axis. When a fiber bundle supplied from a first supplying guide of the first guide unit crosses between a second supplying guide of the second guide unit and the liner, the distance from the second supplying guide to the liner central axis is made larger than the distance from the first supplying guide to the liner central axis, and in the reverse case, the distance from the first supplying guide to the liner central axis is made larger than the distance from the second supplying guide to the liner central axis.

Abstract: A filament winding apparatus includes a hoop winding device mounted with bobbins that supply a fiber bundle. Each of the bobbins is whirled around a periphery of a liner to wind the fiber bundle around an outer peripheral surface of the liner. The hoop winding device is replaceable with another hoop winding device at a predetermined position.

Abstract: There is provided a system for readily and efficiently fabricating a wound coil composed of a bobbinless coil. The system includes a coil winding device having an upper jig to which an upper plate is attached and a lower jig to which a lower plate is attached which are provided so as to be relatively displaceable and a tension device for applying predetermined tension to a wire rod fed from a wire rod supplying source. The coil winding device is provided with a claw section having first through third split claws that function as a winding section around which the wire rod is wound between the upper and lower plates and that slide in a radial direction when the upper jig is assembled coaxially with the lower jig.

Abstract: The hoop winding method allows to manufacture a reinforced tube by carrying out the following operations: depositing a reinforcing layer 2 around metal tube 1, then imposing a tensile force at the metal tube ends so as to plastically deform the metal tube by applying a pressure P2 in enclosure Z2, the force being determined to introduce a compressive stress in the metal tube after release of the force, and imposing a pressure P1 in enclosure Z1 in order to apply a pressure onto the inner wall of the metal tube so as to plastically deform the metal tube, the pressure being determined to introduce a compressive stress in the metal tube after release of the pressure. The fact that the two enclosures Z1 and Z2 are distinct and independent allows pressures P1 and P2 to be applied independently of one another. Thus, the method allows independent radial and axial prestresses to be applied so as to optimize the strength of the hoop-wound tube.

Abstract: A winding method for producing, for example, electric coils, wherein strand-shaped winding material (8) fed by means of a feeding device (7) is wound onto a carrier body having a non-circular cross-section by means of moving the winding material (8) and the carrier body relative to each other. Prior to placing the winding material (8) onto the surface to be wound, a force is applied onto the material transversely to the longitudinal extension thereof such that the strand-shaped winding material conform to the shape of the surface of the carrier body having a non-circular cross-section.

Abstract: A filament winding apparatus reduces fluctuations in a winding operation by bringing a plurality of guide portions that guide fiber bundles to a liner close to the liner in a winding unit. Each of the guide portions is a tubular member having a guide hole penetrated from a base end to a leading end portion. The leading end portion has a smaller thickness width. Each of the guide portions guides a second fiber bundle to the liner by passing the second fiber bundle from a side of the base end portion to a side of the leading end portion of the guide hole. By rotating each of the guide portions about an axis of the guide portion, and by sliding the guide portions in the radius direction of the liner, the guide portions can be brought close to the liner.

Abstract: A process for forming a prestressed structure that includes: winding a plurality of fibers around a structure in order to compressively prestress the structure; wherein the winding is achieved by a fiber tensioning device that includes: a plurality of axles rotatably supported by the frame, each axle having a drum that engages the plurality of aligned fibers, each axle also having a sprocket; a chain for coupling each of the sprockets; a brake connected to the chain which opposes the motion of the chain thus increasing the tension in the plurality of aligned fibers that are in contact with said drums; and whereby the aligned fibers are wound onto the structure under increased tension thus imparting compressive pressure between the aligned fibers on to the wound structure.

Abstract: The invention relates to a process for manufacturing a tubular part, which includes an insert made of a metal matrix composite and within which ceramic fibers extend. The process comprises the following steps: the filaments of a filament bundle are fixed close to one end of a support part, said filaments being separate from one another and each filament comprising a ceramic fiber coated with a metal sheath; and all the filaments of the bundle are wound around the support part along a helical path.

Abstract: A filament winding apparatus that efficiently and orderly winds a fiber bundle with respect to a mandrel in a short period of time. A supporting board supports the mandrel, and a helical winding head supplies and guides the fiber bundle towards the mandrel. The helical winding head includes a group of guide tubes radially arranged on a circumferential surface of a guide ring, and a tube operation mechanism that reciprocates the guide tube along a tube axis center direction. The guide tube is moved closer to a circumferential surface of the dome part when the guide tube is facing a dome part of the mandrel such that the distance between the winding position of the fiber bundle and the guide tube at the dome part can be reduced, and the fiber bundle is orderly wound according to an appropriate winding trajectory.

Abstract: Helical winding is reliably carried out in a plurality of patterns at different angles in a short period of time. A filament winding apparatus for winding fiber bundles onto the surface of a mandrel includes a helical winding head for use in helical winding of the fiber bundles onto the mandrel. The helical winding head includes at least two guide arrays, each including a plurality of guide portions disposed along a circumferential direction of the mandrel, and a repositioning mechanism capable of repositioning the guide portions by rotating each guide array relative to another.

Abstract: The present invention makes it possible to increase production efficiency while reducing costs.

Abstract: A filament winding apparatus equipped with a transfer mechanism of a terminating end of a fiber bundle using a transfer ring that can be switched from a mandrel after the winding process to a mandrel before the winding process. A cutter cuts a fiber bundle wound around a first transfer ring integral with a mandrel after the winding process and a second transfer ring is moved to the mandrel before the winding process between the first and second transfer rings; and a friction roller positions and holds the second transfer ring when cutting the fiber bundle. The friction roller is pressed and biased against the second transfer ring by a compression spring.

Abstract: A pipe is wrapped with a composite to form a pre-stressed interface to facilitate load sharing between the materials. Prior to being wrapped, the pipe is placed in tension via hydraulic devices or the like. Alternatively, a combination of cured and uncured composite wraps is used in proximity to each other to apply compressive stress to the pipe. In addition, the pipe may be subjected to cold temperatures to change its dimensions prior to being wrapped with a composite material.

Abstract: An apparatus for wrapping material onto and around a pipe, the apparatus including a shaft, the shaft rotatable by a driving apparatus, a payout core containing material to be wrapped onto a pipe, the payout core releasably mounted on the shaft, a deflection arm assembly secured to the shaft for rotation by the shaft, rotation of the shaft rotating the deflection arm assembly with respect to the payout core so that the deflection arm assembly takes material from the payout core and wraps the material onto a pipe adjacent the deflection arm assembly, each of the shaft and deflection arm assembly having a central opening through which is movable the pipe as the pipe is being wrapped.