GB2052585A - Stranding Apparatus for Manufacturing Multi-layer Steel Cables, Particularly Steel Cord - Google Patents
Stranding Apparatus for Manufacturing Multi-layer Steel Cables, Particularly Steel Cord Download PDFInfo
- Publication number
- GB2052585A GB2052585A GB8014591A GB8014591A GB2052585A GB 2052585 A GB2052585 A GB 2052585A GB 8014591 A GB8014591 A GB 8014591A GB 8014591 A GB8014591 A GB 8014591A GB 2052585 A GB2052585 A GB 2052585A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stranding
- longitudinal axis
- rotating means
- drive shaft
- axis
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title description 6
- 210000002445 nipple Anatomy 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 12
- 230000007704 transition Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
Abstract
The invention relates to a stranding apparatus for making multi- layer steel cables, particularly steel cord, wherein the core wire 22 of the stranding material runs off a payout reel 5 mounted on a cradle 6 located inside the rotating system, is set in individual rotation and in this state is provided with the covering layer of strands, after which the finished cable is fed onto a coiling drum 17 mounted on a cradle 16, two rotating means 10 and 12 are arranged between two guide rollers 9 and 18 which respectively produce and terminate the individual rotation of the core wire and stranded cable, and by feeding the wires 25 for the covering stranded layer onto the core 22 of the stranding material between the two rotating means 10 and 12, the number of revolutions of the covering wires are </= the individual rotation of the core 22. <IMAGE>
Description
SPECIFICATION
Stranding Apparatus for Manufacturing Multi- layer Steel Cables, Particularly Steel Cord
This invention relates to a stranding apparatus for the manufacture of multi-layer steel cables, particularly, steel cord, wherein the payout reel for the inner layer or core wire and the withdrawing means with a coiling drum lie within the rotating system, while the payout reels for the covering strands are arranged outside the rotating system on fixed frames.
So-called rapid or high-speed stranding machines are generally used for making steel cord, their rotors consisting either of tubes or of rotating tubeless wire guides. The feature common to these stranding machines is that the payout reels are mounted within the rotating system, in reel carriers (cradles) which do not rotate with the rotor. The wires or litzes to be stranded are taken from the reels, outwardly over the longitudinal axis of the rotor and guided along the rotor to the stranding point by suitable guides.
There the wires are immobilised in respect of their movement about the axis of rotation, and the stranded formation is produced. The stranded material is pulled off by withdrawing means and wound onto a reel. As there are a large number of patents for machines of this type, none will be mentioned here. The quality of the products made with such machines is good. The probiems reside in the high rotating speeds of the stranding machine and the large industrial outlay. A considerable number of stranding machines are necessary to obtain the final product for steel cord manufacture. Furthermore, a considerable degree of precision is required to obtain the high rotating speeds, and this increases the capital cost. The likelihood of trouble is also increased.
Attempts have therefore been made to adapt the double stroke principle, frequently used for cable production, to steel wire stranding. The resultant inherent torsion of the individual wires has created considerable difficulties and given poor quality products.
An apparatus for making electrical cables is known from U.S. specification 3,309,857. This apparatus, particularly as shown in Figure 3, comprises a payout reel mounted in a support or cradle which is suspended so that it pendulates freely. A guide yoke circles around the reel. The stranding material (core of cable) running off the payout reel through the centre of the axis of rotation is pulled off by the yoke and returned to the axial centre. Behind the guide yoke in the direction of withdrawal payout reels are arranged in stationary frames. Wires are pulled off these and led via a fixed laying disc to a rotating stranding nipple. The core of the cable, which is set in rotation by the yoke, runs through the stranding nipple, mounted in a stand. Wires coming from the payout frames are wound onto the periphery of the core in the region of the corotated stranding nipple.The cable emerging from the nipple and rotating about its longitudinal axis is now inserted in a yoke turning about the axis of rotation, and from there is taken through the centre of the axis of rotation onto the coiling drum and taken up thereby. Within the flying circle of the yoke the coiling drum is mounted on a rocker, which itself carries out no rotating movement about the central axis of the apparatus.
This apparatus is probably suitable only for producing electric cables. The friction of the cable core in the guide members of the payout means, in conjunction with the ow inherent stiffness of the stranding material, and also the braking force required for the individual wire reels, impedes the individual rotation of the core of the cable and thus changes its original stranding formation, i.e.
its length of twist. The covering layer is thus applied to the core of the cable at a time when the core is not in its initial state, which is also to be its final state. It has to be returned to its original shape in a further process in the double stroke machine. This means that the core of the cable has to be twisted together with the covering layer and thus undergo changes in length.
Consequently the apparatus proposed in this U.S.
specification can be used only for cable production; only so-called "plastic" materials, such as copper or aluminium, can be stranded.
According to the present invention there is provided a stranding apparatus for the stranding of multi-layer steel cables, particularly steel cord, comprising a plurality of aligned spaced-apart support stands each having a drive shaft mounted therein for rotation about a common longitudinal axis of the apparatus, a cradle for supporting a pay-out reel being supported in a non-rotatable manner by the shafts of the first two stands and a cradle for supporting a coiling drum being supported in a non-rotatable manner by the shafts of the last two stands, a first guide roller mounted on the drive shaft of the first support stand with its axis of rotation perpendicular to axis of the drive shaft and a second guide roller mounted on the drive shaft of the last support stand with its axis of rotation perpendicular to the axis of the drive shaft, said guide rollers being rotatable with their respective drive shaft on which they are mounted about the longitudinal axis of the apparatus at the same rotational speed, rotating means being provided on each of the inner support stands which support the cradles and located between said inner support stands, said two rotating means in use of the apparatus rotating the core wire about its longitudinal axis at twice the rotational speed of the guide rollers about the longitudinal axis, a stranding nipple being provided between said rotating means and located on the longitudinal axis, and fixedly located guide rollers being arranged concentrically about the longitudinal axis for guiding strands to be stranded about the core wire to the stranding nipple, the arrangement being such that in use of the apparatus the core wire passes from the pay-out reel to the longitudinal axis, over the first guide roller and around the cradle of the pay-out roller in a curved path back to the longitudinal axis at the first rotating means where it is rotated on the longitudinal axis at twice the rotational speed, through the stranding nipple where the strands from the fixedly located guide rollers are stranded about the core wire, the stranded cable passing along the longitudinal axis and through the second rotating means, around the cradle of the coiling drum in a cured path to the second guide roller and along the longitudinal axis to the coiling drum.
In the stranding apparatus of the present invention the covering layer of the steel cable is obtained by the individual rotation of the steel core, this individual rotation being twice as great as that of the generating system.
A further feature of the invention is that the two rotating means are equipped with variable speed drives, which permit over twice as many revolutions as the guide rollers.
A common transmission may be provided to drive all rotating components.
An embodiment of the invention will now be described, by way of an example, with reference to the accompanying drawing, in which the single figure is a diagrammatic longitudinal section through the apparatus.
As shown in the drawing, the stranding apparatus comprises support stands 1, 2, 3,4 in which all the rotating components are mounted. Between the support stands 1 and 2 a pay-out reel 5 is arranged in a cradle 6, which is mounted for freely pendulating movement in the respective drive shaft 7, 8 supported in the support stands 1 and 2. A guide roller 9 is mounted behind the bearing stand 1 on the drive shaft 7, with its axis of rotation perpendicular to the central longitudinal axis of the stranding apparatus. The roller 9 is bodily rotated about the central longitudinal axis of the apparatus with a number of revolutions n=x, while the speed of rotation about its own axis of rotation depends on the speed at which the stranding material is withdrawn from the reel 5.A rotating means 10 is arranged on the drive shaft 8 of the support stand 2 and rotates about the central longitudinal axis of the apparatus with a number of revolutions n > 2x. On the drive shaft 11 supported in the support stand 3 there is a further rotating means 12 which is rotated at a number of revolutions n > 2x. Between the two rotating means 10 and 12 there is a stranding nipple 13, preceded by stationary guide rollers 14, which are arranged concentrically about the central longitudinal axis. The drive shaft 1 5 supported in the support stand 4, in conjunction with the drive shaft 11 supported in the support stand 3, carries a cradle 1 6 in which is carried a coiling drum 17, the cradle 1 6 is suspended so that it pendulates freely.A further guide roller 18 is mounted in the drive shaft 1 5 with its axis of rotation perpendicular to the central longitudinal axis of the stranding apparatus. The guide rollers
18 are rotated about the central axis of the apparatus and with a number of revolutions n=x.
A withdrawing means 19, a post-shaping apparatus 21 and guide rollers 20 for posttreating and guiding the stranded material are provided on the cradle 1 6.
The core wire 22 of the stranding material (steel wire litz) runs off the pay-out reel 5 at the transition from the stationary to the rotating part of the system, through the centre thereof and from there onto the periphery of the rotating guide roller 9. From here the core wire 22 flies freely in a curve or is guided positively in a curve back to the cental longitudinal axis of the rotating means 10.As a result of the rotating of the roller 9 about the central longitudinal axis of the stranding apparatus with a number of revolutions n=x, and as a result of the further guiding of the core wire 22 around the pay-out apparatus, an individual rotation is theoretically imparted to the stranding material 22, about its longitudinal axis, with a number of revolutions n > 2x. The individual rotation is of course somewhat impeded by friction in the wire guides. The two successive rotating means 10 and 12 therefore rotate with a number of revolutions n > 2x. The individual rotation of the core wire 22, particularly at the stranding nipple 13, is thereby assisted so that exact stranding takes place, i.e. the core wire 22 of stranding material and the wires 25 of the covering layer have their final position at the moment of stranding.After passing the stranding nipple 13 and the second rotating means 12, the cable 23 passes, again either by flying freely in a curve of being positively guided in a curve, onto the periphery of the rotating guide roller 1 8, which is rotated about the central longitudinal axis with a number of revolutions n=x. From here, at the transition from the rotating to the stationary system, the cable passes from the central longitudinal axis over guide rollers 19, 20 and through the post-shaping device 21 onto the coiling drum 1 7. The individual rotation of the stranded cable 23 is terminated here, at the transition from the rotating to the stationary system. All the driving transmissions are advantageously driven from a drive transmission 24.
With this stranding apparatus it is possible to make very strong multi-layer steel cables, particularly steel cord cables, of a high quality and with only a small outlay on machinery. The individual rotation of the stranding material, necessary for stranding the covering layer, is obtained with half the number of revolutions used for the parts of the apparatus which are more highly dependent on centrifugal force. Thus stranding efficiency can be considerably increased over known stranding systems.
The rotating means 10 and 12 may be provided with a variable speed drive.
Claims (4)
1. A stranding apparatus for the stranding of multi-layer steel cables, particularly steel cord, comprising a plurality of aligned spaced-apart support stands each having a drive shaft mounted therein for rotation about a common longitudinal axis of the apparatus, a cradle for supporting a payout reel being supported in a non-rotatable manner by the shafts of the first two stands and a cradle for supporting a coiling drum being supported in a non-rotatable manner by the shafts of the last two stands, a first guide roller mounted on the drive shaft of the first support stand with its axis of rotation perpendicular to the axis of the drive shaft and a second guide roller mounted on the drive shaft of the last support stand with its axis of rotation perpendicular to the axis of the drive shaft, said guide rollers being rotatable with their respective drive shaft on which they are mounted about the longitudinal axis of the apparatus at the same rotational speed, rotating means being provided on each of the inner support stands which support the cradles and located between said inner support stands, said two rotating means in use of the apparatus rotating the core wire about its longitudinal axis at twice the rotational speed of the guide rollers about the longitudinal axis, a stranding nipple being provided between said rotating means and located on the longitudinal axis, and fixedly located guide rollers being arranged concentrically about the longitudinal axis for guiding strands to be stranded about the core wire to the stranding nipple, the arrangement being such that in use of the apparatus the core wire passes from the pay-out reel to the longitudinal axis, over the first guide roller and around the cradle of the pay-out roller in a curved path back to the longitudinal axis at the first rotating means where it is rotated on the longitudinal axis at twice the rotational speed, through the stranding nipple where the strands from the fixedly located guide rollers are stranded about the core wire, the stranded cable passing along the longitudinal axis and through the second rotating means, around the cradle of the coiling drum in a curved path to the second guide roller and along the longitudinal axis to the coiling drum.
2. A stranding apparatus as claimed in claim 1, in which the rotating means are provided with variable speed drives.
3. A stranding apparatus as claimed in claim 1 or claim 2, in which common drive transmission is provided to drive the rotating components in the support stands.
4. A stranding apparatus for the stranding of multi-layer steel cable, substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD79213826A DD143279A1 (en) | 1979-06-22 | 1979-06-22 | SEPARATING DEVICE FOR PRODUCING MULTILAYER STEEL, IN PARTICULAR STRAIN CORD |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2052585A true GB2052585A (en) | 1981-01-28 |
| GB2052585B GB2052585B (en) | 1983-04-20 |
Family
ID=5518848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8014591A Expired GB2052585B (en) | 1979-06-22 | 1980-05-02 | Stranding apparatus for manufacturing multi-layer steel cables particularly steel cord |
Country Status (4)
| Country | Link |
|---|---|
| DD (1) | DD143279A1 (en) |
| DE (1) | DE3013394A1 (en) |
| GB (1) | GB2052585B (en) |
| IT (1) | IT1130714B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0247663A1 (en) * | 1986-05-27 | 1987-12-02 | N.V. Bekaert S.A. | Production of steel cord |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD226604B1 (en) * | 1984-09-17 | 1990-08-29 | Thaelmann Schwermaschbau Veb | DEVICE FOR PRODUCING MULTILAYER STEEL WIRE LIGHTS |
| CN105970707B (en) * | 2016-08-03 | 2021-09-21 | 北京中科海讯数字科技股份有限公司 | Device for twisting two strands of steel wires into one strand |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1390922A (en) * | 1963-04-12 | 1965-03-05 | Geoffroy Delore | Method for transmitting a rotational movement from one end of a filiform element to the other, and wiring machines for implementing this method |
-
1979
- 1979-06-22 DD DD79213826A patent/DD143279A1/en not_active IP Right Cessation
-
1980
- 1980-04-05 DE DE19803013394 patent/DE3013394A1/en active Granted
- 1980-05-02 GB GB8014591A patent/GB2052585B/en not_active Expired
- 1980-05-05 IT IT21798/80A patent/IT1130714B/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0247663A1 (en) * | 1986-05-27 | 1987-12-02 | N.V. Bekaert S.A. | Production of steel cord |
| US4785617A (en) * | 1986-05-27 | 1988-11-22 | N.V. Bekaert S.A. | Production of steel cord |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1130714B (en) | 1986-06-18 |
| IT8021798A0 (en) | 1980-05-05 |
| GB2052585B (en) | 1983-04-20 |
| DE3013394A1 (en) | 1981-01-08 |
| DE3013394C2 (en) | 1989-06-01 |
| DD143279A1 (en) | 1980-08-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19980502 |