EP0801167A2 - Machine à câbler à simple torsion, notamment pour la fabrication de câbles métalliques de grand diamètre - Google Patents

Machine à câbler à simple torsion, notamment pour la fabrication de câbles métalliques de grand diamètre Download PDF

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Publication number
EP0801167A2
EP0801167A2 EP97105834A EP97105834A EP0801167A2 EP 0801167 A2 EP0801167 A2 EP 0801167A2 EP 97105834 A EP97105834 A EP 97105834A EP 97105834 A EP97105834 A EP 97105834A EP 0801167 A2 EP0801167 A2 EP 0801167A2
Authority
EP
European Patent Office
Prior art keywords
winder
axis
winder frame
frame
machine according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97105834A
Other languages
German (de)
English (en)
Other versions
EP0801167A3 (fr
EP0801167B1 (fr
Inventor
Sergio Cortinovis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cortinovis SpA
Original Assignee
Cortinovis SpA
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Filing date
Publication date
Application filed by Cortinovis SpA filed Critical Cortinovis SpA
Publication of EP0801167A2 publication Critical patent/EP0801167A2/fr
Publication of EP0801167A3 publication Critical patent/EP0801167A3/fr
Application granted granted Critical
Publication of EP0801167B1 publication Critical patent/EP0801167B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B3/00—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material
    • D07B3/08—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the take-up reel rotates about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the rope or cable on the take-up reel in fixed position and the supply reels are fixed in position
    • D07B3/085—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the take-up reel rotates about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the rope or cable on the take-up reel in fixed position and the supply reels are fixed in position in which a guide member rotates about the axis of the rope or cable to guide the rope or cable on the take-up reel in fixed position
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D07B7/021—Guiding means for filaments, strands, ropes or cables

Definitions

  • the present invention relates to a machine for the single-twist stranding of cables composed of a plurality of wires, particularly for large-diameter cables.
  • Conventional machines for stranding cables composed of a plurality of wires are substantially constituted by a rotating take-up unit or drum-twister composed of a frame which is rotatably rested or mounted in a cantilevered fashion about its own axis, which is generally arranged horizontally.
  • the rotating take-up unit internally supports a take-up reel which is arranged so that its axis is perpendicular to the rotation axis of the rotating take-up unit.
  • the reel can be rotated about its own axis independently of the rotation of the rotating take-up unit.
  • the cable to be stranded enters the rotating take-up unit through one of its axial ends, at the axis of the rotating take-up unit, and is gradually wound on the reel.
  • the rotating take-up unit In practice, rotation of the rotating take-up unit about its own axis causes the stranding of the wire which is wound on the reel.
  • the stranding pitch is expressed by the ratio between the advancement rate of the cable to be stranded, which is a function of the rotation rate of the reel, and the rotation rate of the rotating take-up unit.
  • Machines which perform a kind of stranding known as single-twist stranding and are constituted by a winder frame which is rotatably supported about its own generally horizontal axis and can be rotated about said axis.
  • a winder reel is supported inside the winder frame so that it can rotate freely about its own axis, which coincides with the axis of the winder frame. Both the winder frame and the winder reel can be rotatably actuated about their common axis.
  • the cable to be stranded is guided from a feed area, located at the axis of the winder frame, to a portion of said winder frame which laterally faces the reel.
  • the cable to be stranded is guided by a pair of pulleys, around which the cable to be stranded partially winds.
  • the cable arriving from the spinner passes through a hollow shaft arranged at an axial end of the winder frame and then, by partially winding around the two guiding pulleys, it is directed onto the winder reel by means of an appropriate guide.
  • the rotation rate of the winder frame determines the number of twists of the cable and therefore the machine productivity. This rotation rate can be as high as 1000 rpm in modern single-twist stranding machines, with respect to the 200 rpm obtainable with the previously described stranding machines, indeed because the stranding motion does not involve the rotation of the larger mass, which is constituted by the winder reel.
  • the number of wound turns must be equal to the produced length (p ⁇ N B ) divided by the winding circumference.
  • N A N B (1 - p 2 ⁇ r ) is very high, and accordingly, since p 2 ⁇ r is usually equal to 1/10, in normal use N A is equal to 9/10 N B . Since the reel motion is symmetrical (rotation of a cylindrical body about its own axis of symmetry) and is not a revolving motion as in the case of the drum-twister rotating take-up unit, it is possible to achieve high winding speeds and therefore high productivities with these machines.
  • a principal aim of the present invention is to solve the above drawbacks by providing a machine which is capable of performing single-twist stranding even of cables having a large diameter and a complex structure.
  • an object of the present invention is to provide a single-twist stranding machine providing high productivity.
  • Another object of the present invention is to provide a single-twist stranding machine which can in any case be used for the stranding of small-diameter cables.
  • a machine for the single-twist stranding of cables composed of a plurality of wires, particularly for large-diameter cables comprising a winder frame which is rotatably supported about its own axis and a winder reel arranged inside the winder frame, said winder reel being rotatably supported independently about its own axis, which substantially coincides with the axis of said winder frame, means being provided for independently rotating said winder frame and said winder reel about said axis, characterized in that said winder frame is provided with at least one guide forming a path for a cable to be stranded which runs from a feed area for feeding the cable to be stranded, which is located proximate to the axis of the winder frame, to a region laterally spaced from said axis of the winder frame and laterally faces said winder reel, said path being inclined with respect to the axis of the winder frame at least along part of
  • the machine according to the present invention comprises a winder frame 2, which is rotatably supported about its own horizontally arranged axis 2a, and a winder reel 3, which is also rotatably supported about its own axis, which substantially coincides with the axis 2a, inside the winder frame 2.
  • the winder frame 2 is provided with at least one guide 4 forming a path for a cable 5 to be stranded which runs, starting from a feed area 6 located proximate to the axis 2a of the winder frame 2, up to a region 7 which is laterally spaced from the axis 2a and laterally faces the winder reel 3.
  • the path is inclined with respect to the axis 2a of the winder frame at least along part of its extension starting from the feed area 6.
  • the guide 4 for the cable 5 to be stranded is formed by at least one arm 8 rigidly coupled to the winder frame 2.
  • the path can also be formed by one or more passages 9a, 9b, 9c formed in a substantially conical portion 10 of the winder frame.
  • the arm or arms forming the path for the cable 5 to be stranded are provided with means for containing the outward expansion of the cable 5 produced by centrifugal force.
  • These containment means can be constituted, as shown in particular in figures 3 to 8, by a shape which is concave towards the axis 2a of the arms or of the passages that form the path for the cable 5 to be stranded and/or by a plurality of pairs of rollers 11a and 11b having axes inclined with respect to each other and being freely supported about their respective axes by said arm or arms which form the path for the cable 5 to be stranded, as shown in figure 2.
  • the pairs of rollers 11a and 11b are spaced from each other along the extension of the corresponding arm and form a cradle for the cable 5 for the resting of said cable 5 on the outside, i.e., on the opposite side with respect to the axis 2a.
  • passage bushings 12 through which the cable 5 passes, between the pairs of rollers 11a and 11b.
  • the arm or arms 8, 8a, 8b, 8c have a hollow cross-section wherein the concave face is directed towards the axis 2a and has a symmetrical transverse cross-section so as to move in both directions to allow right-handed or left-handed stranding.
  • the profile of the arms is cambered so as to produce limited aerodynamic drag in both directions.
  • the cross-sections of the various arms are such that the moments of inertia of the winder frame 2, with respect to all the axes lying on a plane which is perpendicular to the axis 2a, are identical to each other.
  • the rollers 11a and 11b can have a cylindrical or diabolo-like shape and are located so that each pair arranged on the same plane at right angles to the axis of the wire 5 has a mutual distance and axes which are inclined with respect to each other so as to form a curved element adapted for the predictable average diameter of the cable 5 to be produced (which must slide while resting thereon) and so that the entire set of rollers is arranged along the intended cable path.
  • rollers 11a and 11b and/or the concave configuration of the arm have the purpose of preventing the wire from expanding outwards as a consequence of the centrifugal force during rotation of the winder frame 2.
  • the winder frame 2 is therefore constituted by a first portion which is conical or traces a conical shape in its rotary motion and wherein said at least one guide for the wire 5 is formed, and by a second portion, which is cylindrical or traces a cylindrical shape as a consequence of its rotation about the axis 2a and supports and contains the winder reel 3.
  • the winder frame 2 rests, at the feed area 6, on a support 20 through the interposition of a bearing 21 and, at the opposite axial end, on a support 22 by means of the interposition of a bearing 23.
  • the winder frame 2 can be rotated about the axis 2a for example by means of a gearmotor 24.
  • the reel 3 is rotatably supported about its own axis which, as mentioned, coincides with the axis 2a, by means of a complementary bearing 25 arranged inside the winder frame 2 and by means of a bearing 26 arranged inside or outside the winder frame 2.
  • the reel 3, too, can be rotatably actuated about the axis 2a through an adapted gearmotor 27.
  • the cable 5 to be stranded is conveyed onto the lateral surface of the winder reel 3 by means of an adapted thread guide 28 applied to the winder frame 2.
  • the axial end of the winder frame 2 resting on the bearing 21 is constituted by a hollow shaft 29, through which the cable 5 to be stranded passes.
  • the cylindrical portion, or the portion tracing a cylinder during rotation of the winder frame 2 about the axis 2a can support two disks 31 and 32 the axis whereof coincides with the axis 2a and which rest on supporting rollers 33 and 34, as also shown in figure 10.
  • the reel 3 can be supported by a shaft 35 the axis whereof coincides with the axis 2a and which is rotatably supported about the same axis by the winder frame 2 and can be extracted in order to allow insertion or removal of the reel 3.
  • the shaft 35 also stiffens the structure of the winder frame in cooperation with the shaft 44.
  • the winder frame 2 can also be supported by a large-diameter ball bearing 36 instead of being supported at its end on the support 20.
  • a controlled traction unit can be provided in the portion of the winder frame 2 which is conical or forms a conical surface as a consequence of its rotation about the axis 2a; the traction unit 37 is constituted by at least one flywheel, two flywheels 38a and 38b in the illustrated case, with axes which are parallel to each other and perpendicular to the axis 2a.
  • the controlled traction unit 37 is completed by a guiding roller 39, so as to form a path for the cable 5 to be stranded which can be likened to the path followed in conventional single-twist stranding machines.
  • the controlled traction unit 37 can be used in stranding small-diameter cables which withstand bending around a smaller radius of curvature than that of the reel 3, so as to make the machine according to the invention adapted to be used also for cables having a reduced cross-section, thus achieving very high stranding speeds.
  • the surfaces against which the cable 5 rests along the path between the feed area 6 and the guide 28 can be coated with antifriction materials as an alternative to the system with rollers opposite to each other.
  • the cable 5 arriving from the spinner is inserted through the hollow shaft 29 and conveyed along the path formed by the portion which is conical or traces a conical surface as a consequence of its rotation about the axis 2a, up to the guide 28, wherethrough the cable 5 is conveyed onto the reel 3.
  • the materials employed, as well as the dimensions, may be any according to requirements and to the state of the art.

Landscapes

  • Ropes Or Cables (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Insulated Conductors (AREA)
EP97105834A 1996-04-12 1997-04-09 Machine à câbler à simple torsion, notamment pour la fabrication de câbles métalliques de grand diamètre Expired - Lifetime EP0801167B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI960716 1996-04-12
IT96MI000716A IT1283597B1 (it) 1996-04-12 1996-04-12 Macchina per la cordatura a monotorsione di cavi composti da piu' fili, particolarmente per cavi di elevato diametro.

Publications (3)

Publication Number Publication Date
EP0801167A2 true EP0801167A2 (fr) 1997-10-15
EP0801167A3 EP0801167A3 (fr) 1999-05-12
EP0801167B1 EP0801167B1 (fr) 2003-07-02

Family

ID=11373964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97105834A Expired - Lifetime EP0801167B1 (fr) 1996-04-12 1997-04-09 Machine à câbler à simple torsion, notamment pour la fabrication de câbles métalliques de grand diamètre

Country Status (3)

Country Link
EP (1) EP0801167B1 (fr)
ES (1) ES2202510T3 (fr)
IT (1) IT1283597B1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1058409B (de) * 1954-10-16 1959-05-27 Richard Reiche Fluegelspinnmaschine zur Herstellung von Litzen, Seilen od. dgl.
FR1384772A (fr) * 1963-11-27 1965-01-08 Machine à assembler les câbles à simple torsion
GB1008291A (en) * 1963-05-24 1965-10-27 British Insulated Callenders Apparatus for winding flexible material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1058409B (de) * 1954-10-16 1959-05-27 Richard Reiche Fluegelspinnmaschine zur Herstellung von Litzen, Seilen od. dgl.
GB1008291A (en) * 1963-05-24 1965-10-27 British Insulated Callenders Apparatus for winding flexible material
FR1384772A (fr) * 1963-11-27 1965-01-08 Machine à assembler les câbles à simple torsion

Also Published As

Publication number Publication date
IT1283597B1 (it) 1998-04-22
ITMI960716A0 (fr) 1996-04-12
EP0801167A3 (fr) 1999-05-12
ES2202510T3 (es) 2004-04-01
ITMI960716A1 (it) 1997-10-12
EP0801167B1 (fr) 2003-07-02

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