EP1331650B1 - Method and associated apparatus for reducing the tension of wires during a strand production process - Google Patents
Method and associated apparatus for reducing the tension of wires during a strand production process Download PDFInfo
- Publication number
- EP1331650B1 EP1331650B1 EP03075183A EP03075183A EP1331650B1 EP 1331650 B1 EP1331650 B1 EP 1331650B1 EP 03075183 A EP03075183 A EP 03075183A EP 03075183 A EP03075183 A EP 03075183A EP 1331650 B1 EP1331650 B1 EP 1331650B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wire
- roller
- speed
- wires
- winding
- 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.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
- H01B13/0285—Pretreatment
Definitions
- the present invention relates to a method and an associated apparatus for reducing the tension of wires during a process for production of a strand using said wires.
- said strands are made from a wire or a plurality of wires wound onto a supply reel from which the wire(s) is/are unwound so as to be fed to the stranding machine which forms the bundles of wires, imparts one or more twists to them and winds the strand thus formed onto a take-up reel.
- the wire is however subject to slackening and/or tensioning and, in order to compensate for this, the supply reel is equipped with an arm for adjusting the unwinding speed; said arm has a roller onto which the wire is wound and is connected to means for adjusting the speed of rotation of the said reel.
- the wire is subject to a tension in the longitudinal direction which is permitted and regulated within certain limits, since it tends to equalize the behaviour of different wires wound onto the same reel and wires wound onto different reels.
- the technical problem which is posed, therefore, is that of providing a method and an apparatus which allows a reduction in the tension produced on the wire during winding thereof onto a reel, for example of a stranding machine.
- the present invention also relates to an apparatus for reducing the tension of wires during a process for forming a strand according to the characteristics of claim 8.
- a conventional plant for forming a strand 2 from at least one wire 1 comprises essentially a reel 10 for supplying the wire(s) 1, a device 20 for guiding the wire(s) entering a stranding machine, schematically shown together with the associated winding reel 30.
- the guiding device schematically shown is of the type able to impart a single twist to the wire, but, although not illustrated, the stranding machine may comprise means able to impart a double twist to the wires before they are wound onto the reel 30.
- the supply reel 10 is connected to an arm 11 for adjusting its speed of rotation, which arm is in turn connected to the wires being unwound.
- Fig. 2 shows the plant according to Fig. 1 equipped with an apparatus 100 for reducing the tension of the wires to which the wires 1 are subject during the process for forming and winding a strand 2, which apparatus is arranged in a position between the supply reel 10 and the point of entry into the stranding machine in the direction of feeding of the wires 1.
- the apparatus according to the invention will also be called a tension-reducing apparatus.
- the tension-reducing apparatus 100 is substantially formed by a first roller 111 which is motorized and by a second drive roller 112 which is idle, the wires 1 being made to pass between said rollers.
- the first motorized roller 111 is rotated by means of an associated controlled motor 111a which imparts a speed of rotation of the roller such as to produce a peripheral speed which is slightly greater than the driving speed of the stranding machine.
- the motor 111a is also connected to a speed control device 120, for example of the type called "encoder", onto which one of the wires 1 fed to the stranding machine is wound; said device is able to detect the speed of the roller and send corresponding signals to actuating means able to vary the speed of rotation of the motor 111a and therefore the corresponding roller 111.
- a speed control device 120 for example of the type called "encoder”
- the second idle roller 112 is mounted on an associated frame 112a which is movable translationwise parallel to the direction of feeding of the wires 1 so as to produce a relative position of the two rollers 111,112 such as to allow adjustment of the winding angle of the said wires 1 around the first motorized roller as illustrated in Figs. 4a to 4c where a winding angle of 90° is modified to a winding angle of about 180°.
- the second roller 112 is in turn motorized by means of a motor 111b which is also regulated by the encoder signal and imparts to the second roller 112 a speed of rotation which is substantially the same as that of the first roller 111 and therefore slightly greater than the speed of feeding of the wire.
- the tension-reducing effect is substantially determined by the winding angle on the first motorized (or active) roller - or by the sum of the winding angles on all the active rollers - it follows that, for the same reduction in tension on the wires 1, the motorization of the second roller 112 results in winding angles of the wires on the two active rollers which are smaller than those required in the case of an idle second roller, also allowing the mechanical design of the apparatus to be simplified.
- a method for reducing the longitudinal tension of wires 1 forming the components of a strand 2 to be wound onto a reel 30 of a stranding machine is also defined, said method envisaging the following steps:
- said pulling/pushing action is obtained by means of application of a sliding friction to the wire; said sliding friction being determined by the pulling/pushing action of a roller on which the wire is wound at a predefined winding angle depending on the characteristics of the wire and the strand to be formed.
- Said winding angle is normally between 60° and 300° and preferably between 90° and 240°.
- the roller which applies the pulling/pushing force to the wire is rotationally actuated so as to have a speed slightly greater than the speed of driving of the wire by the stranding machine.
- the peripheral speed of the roller is greater than the speed of driving of the wire by an amount ranging between 2% and 10% of the latter.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Ropes Or Cables (AREA)
- Wire Processing (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
Abstract
Description
- The present invention relates to a method and an associated apparatus for reducing the tension of wires during a process for production of a strand using said wires.
- It is known in the technical sector relating to the production of conductor strands and the like that said strands are made from a wire or a plurality of wires wound onto a supply reel from which the wire(s) is/are unwound so as to be fed to the stranding machine which forms the bundles of wires, imparts one or more twists to them and winds the strand thus formed onto a take-up reel.
- It is also known that the movement of the wire is determined by the stranding machine which pulls the wires, unwinding them from the supply reel at a predetermined speed.
- Owing to the sliding friction which arises during the various steps of the process, the wire is however subject to slackening and/or tensioning and, in order to compensate for this, the supply reel is equipped with an arm for adjusting the unwinding speed; said arm has a roller onto which the wire is wound and is connected to means for adjusting the speed of rotation of the said reel.
- During the winding process the wire is subject to a tension in the longitudinal direction which is permitted and regulated within certain limits, since it tends to equalize the behaviour of different wires wound onto the same reel and wires wound onto different reels.
- This tension in the wire, however, gives rise to drawbacks since it increases the tensile load on the wire, deteriorating its functional characteristics and results in the need to increase the driving load of the stranding machine with the consequent need for larger dimensions and an increase in the costs associated with the said machine.
- An exemple of the prior art according to the preamble of claims 1, 8 and 16 is disclosed into
EP 0 352 049 . - The technical problem which is posed, therefore, is that of providing a method and an apparatus which allows a reduction in the tension produced on the wire during winding thereof onto a reel, for example of a stranding machine.
- Within the context of this problem a further requirement is that said apparatus should be simple and inexpensive to realise and also applicable to machines of the traditional type without the need for major modifications.
- These technical problems are solved according to the present invention by a method for reducing the tension of wires during a process for production of a strand using said wires, according to the characteristics of claim 1.
- The present invention also relates to an apparatus for reducing the tension of wires during a process for forming a strand according to the characteristics of claim 8.
- Further details may be obtained from the following description of a non-limiting example of embodiment of the invention, provided with reference to the accompanying plates of drawings in which:
-
Figure 1 shows a functional diagram of a plant of the conventional type for forming a strand; -
Figure 2 shows a diagram similar to that ofFig. 1 with an apparatus for reducing the tension of the wire, according to the present invention; -
Figure 3 shows a view of an example of embodiment of the tension-reducing apparatus according to the present invention; and -
Figures 4a-4c show schematic views of examples of differently adjusted arrangements of a second embodiment of the apparatus according to the invention. - As illustrated in
Fig. 1 , a conventional plant for forming a strand 2 from at least one wire 1 comprises essentially areel 10 for supplying the wire(s) 1, adevice 20 for guiding the wire(s) entering a stranding machine, schematically shown together with the associatedwinding reel 30. In the example according toFig. 1 , the guiding device schematically shown is of the type able to impart a single twist to the wire, but, although not illustrated, the stranding machine may comprise means able to impart a double twist to the wires before they are wound onto thereel 30. - The
supply reel 10 is connected to anarm 11 for adjusting its speed of rotation, which arm is in turn connected to the wires being unwound. -
Fig. 2 shows the plant according toFig. 1 equipped with anapparatus 100 for reducing the tension of the wires to which the wires 1 are subject during the process for forming and winding a strand 2, which apparatus is arranged in a position between thesupply reel 10 and the point of entry into the stranding machine in the direction of feeding of the wires 1. - For the sake of brevity below, the apparatus according to the invention will also be called a tension-reducing apparatus.
- As illustrated in
Fig. 3 , the tension-reducingapparatus 100 according to the invention is substantially formed by afirst roller 111 which is motorized and by asecond drive roller 112 which is idle, the wires 1 being made to pass between said rollers. - The first motorized
roller 111 is rotated by means of an associated controlled motor 111a which imparts a speed of rotation of the roller such as to produce a peripheral speed which is slightly greater than the driving speed of the stranding machine. - The motor 111a is also connected to a
speed control device 120, for example of the type called "encoder", onto which one of the wires 1 fed to the stranding machine is wound; said device is able to detect the speed of the roller and send corresponding signals to actuating means able to vary the speed of rotation of the motor 111a and therefore thecorresponding roller 111. - The
second idle roller 112 is mounted on an associated frame 112a which is movable translationwise parallel to the direction of feeding of the wires 1 so as to produce a relative position of the two rollers 111,112 such as to allow adjustment of the winding angle of the said wires 1 around the first motorized roller as illustrated inFigs. 4a to 4c where a winding angle of 90° is modified to a winding angle of about 180°. - The greater the winding angle of the wires 1 on the
active roller 111, the greater will be the effect of the apparatus and therefore the reduction in the tension exerted on the wires leaving the apparatus; this allows obviously the working conditions of the said apparatus to be adjusted in relation to the different characteristics of the wires 1 to be wound and/or the strands 2 to be formed. - As illustrated in
Fig. 3 in broken lines it is also possible to envisage that thesecond roller 112 is in turn motorized by means of amotor 111b which is also regulated by the encoder signal and imparts to the second roller 112 a speed of rotation which is substantially the same as that of thefirst roller 111 and therefore slightly greater than the speed of feeding of the wire. Since the tension-reducing effect is substantially determined by the winding angle on the first motorized (or active) roller - or by the sum of the winding angles on all the active rollers - it follows that, for the same reduction in tension on the wires 1, the motorization of thesecond roller 112 results in winding angles of the wires on the two active rollers which are smaller than those required in the case of an idle second roller, also allowing the mechanical design of the apparatus to be simplified. - According to the present invention, a method for reducing the longitudinal tension of wires 1 forming the components of a strand 2 to be wound onto a
reel 30 of a stranding machine is also defined, said method envisaging the following steps: - unwinding at least one wire 1 from a supply reel;
- feeding the unwound wire 1 to a stranding machine which pulls the wire, winding it onto a take-up reel 31 at a predefined winding speed;
- In a preferred embodiment, said pulling/pushing action is obtained by means of application of a sliding friction to the wire; said sliding friction being determined by the pulling/pushing action of a roller on which the wire is wound at a predefined winding angle depending on the characteristics of the wire and the strand to be formed.
- Said winding angle is normally between 60° and 300° and preferably between 90° and 240°.
- The roller which applies the pulling/pushing force to the wire is rotationally actuated so as to have a speed slightly greater than the speed of driving of the wire by the stranding machine.
- Preferably the peripheral speed of the roller is greater than the speed of driving of the wire by an amount ranging between 2% and 10% of the latter.
- With application of the method for reducing the tension of the wire according to the invention it has been experimentally established that, when manufacturing 84-strand conductors of the smooth bunch type having a wire diameter of 0.40 mm (84x0.40), the cross-section is much more uniform and geometrically regular.
- In addition to the above the winding quality control parameters improve as shown in the following table:
PARAMETER WITH
TENSION-REDUCERWITHOUT
TENSION-REDUCERElongation of wires (%) 20.8 13.6 Electrical resistance (ohm/kg) 1.74 1.84
Claims (16)
- Method for reducing the tension of wires (1) during a process for production of a strand (2) using said wires (1) , comprising the steps of:- unwinding at least one wire (1) from a supply reel (10);- feeding along a feeding direction the unwound wire (1) to a stranding machine (30) which pulls the wire (1), winding it onto a take-up reel (31) at a predetermined winding speed;characterized in that said at least one wire (1) is subjected to a pulling/pushing action in the same sense as the direction of feeding thereof, along the section of the travel path between the supply reel and the point of entry into the stranding machine, by the fact that said pulling/pushing action is applied by an apparatus comprising a first roller (111) and a second roller (112), which are spaced apart along a distance perpendicular to the feeding direction, and at least one (111) of which is motorized (111a), said first (111) and second (112) rollers being movable relative to each other in a direction parallel to the feeding direction, allowing adjustment of a winding angle of the at least one wire (1).
- Method according to Claim 1, characterized in that said pulling/pushing action is obtained by means of application of a sliding friction to the wire (1).
- Method according to Claim 2, characterized in that said sliding friction is determined by the pulling/pushing action of a pair of motorized rollers (111,112) on which the wire (1) is wound at a predefined winding angle.
- Method according to Claim 3, characterized in that said winding angle is between 60° and 300°.
- Method according to Claim 4, characterized in that said winding angle is preferably between 90° and 240°.
- Method according to Claim 1, characterized in that the roller (111) which applies the pulling/pushing action to the wire (1) is rotationally actuated so as to have a speed greater than the speed of driving of the wire by the stranding machine (30).
- Method according to Claim 6, characterized in that the speed of rotation of the motorized roller (111,111a) is greater than the speed of driving of the wire by an amount ranging between 2% and 10% of the latter.
- Apparatus for reducing the tension of the wires (1) during a process for forming a strand (2) wound onto a reel of a stranding machine (30) using at least one wire (1) fed from a supply reel (10,11), along a feeding direction characterized in that it comprises means (111,112) able to impart to said at least one wire (1) a pulling/pushing action in the same sense as the direction of feeding of the said wire (1), said pulling/pushing means (100) being located along the section of the travel path between the supply reel (10,11) and the winding reel (30) prior to the stranding machine (30), and
comprising as said means (111,112) at least one first roller (111) which is motorized and able to impart said pushing/pulling action and a second drive roller (112) which is idle, the wires (1) being wound around said rollers, in that
said first (111) and second (112) rollers are parallel to each other and in that
said second roller (112) is movable translationwise relative to the first roller (111), to allow adjustment of the winding angle of the wire (1) around the rollers. - Apparatus according to Claim 8, characterized in that said pushing means comprise at least one first motorized roller (111) able to impart said pushing/pulling action and at least one second motorized roller (112), around which rollers the wires (1) are wound.
- Apparatus according to Claim 8, characterized in that said first motorized roller (111) is rotated at a speed of rotation greater than the winding speed of the reel (30) of the stranding machine.
- Apparatus according to Claim 10, characterized in that the speed of rotation of the motorized roller (111) is greater than the speed of driving of the wire (1) by an amount preferably ranging between 2% and 10% of the latter.
- Apparatus according to Claim 8, characterized in that said first motorized roller (111) is rotated at a speed of rotation greater than the winding speed of the stranding machine and said second motorized roller (112) is rotated at a speed substantially the same as that of the first roller.
- Apparatus according to Claim 8, characterized in that it comprises a device (120) for controlling the speed of rotation of the motorized roller(s) on which one of the wires (1) fed to the stranding machine (30) is wound.
- Apparatus according to claim 13, characterized in that said control device (120) is able to detect the speed of the roller and send corresponding signals to actuating means able to vary the speed of rotation of the motor (111a,111b) for actuating the motorized roller(s).
- Apparatus according to Claim 8, characterized in that the angle of winding of the wire (1) around the motorized roller(s) is between 60° and 300'.
- Plant for forming strands (2) from wires (1), in which at least one stranding machine with a winding reel (30) and at least one reel (10,11) for feeding at least one wire (1) are envisaged, characterized in that it comprises an apparatus for reducing the tension of said at least one wire (1), according to claim 8.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2002MI000120A ITMI20020120A1 (en) | 2002-01-24 | 2002-01-24 | METHOD AND RELATED EQUIPMENT FOR DETENSIONING OF WIRES DURING A ROPE PRODUCTION PROCESS |
ITMI20020120 | 2002-01-24 |
Publications (4)
Publication Number | Publication Date |
---|---|
EP1331650A2 EP1331650A2 (en) | 2003-07-30 |
EP1331650A3 EP1331650A3 (en) | 2003-12-03 |
EP1331650B1 true EP1331650B1 (en) | 2010-07-28 |
EP1331650B8 EP1331650B8 (en) | 2010-09-01 |
Family
ID=11448973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03075183A Expired - Lifetime EP1331650B8 (en) | 2002-01-24 | 2003-01-20 | Method and associated apparatus for reducing the tension of wires during a strand production process |
Country Status (5)
Country | Link |
---|---|
US (1) | US20030141400A1 (en) |
EP (1) | EP1331650B8 (en) |
AT (1) | ATE475973T1 (en) |
DE (1) | DE60333509D1 (en) |
IT (1) | ITMI20020120A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105047319B (en) * | 2015-08-25 | 2017-03-08 | 安吉腾飞电子有限公司 | A kind of stranded winding device of electric wire |
US10934142B2 (en) * | 2018-02-27 | 2021-03-02 | Hall Labs Llc | Motor-driven fairlead for assisting spooling or unspooling from a winch |
Family Cites Families (21)
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US2127936A (en) * | 1935-11-29 | 1938-08-23 | Nat Standard Co | Wire winding apparatus |
US2985393A (en) * | 1956-03-12 | 1961-05-23 | Glanzstoff Ag | Winding machine for the production of bobbins with predetermined thread tension overthe bobbin run |
US3526368A (en) * | 1968-06-10 | 1970-09-01 | Deering Milliken Res Corp | Method and apparatus for winding thread |
GB1235439A (en) * | 1969-06-18 | 1971-06-16 | Standard Telephones Cables Ltd | An arrangement for controlling the acceleration and tension of strip material being unwound from a spirally wound pad |
US4212422A (en) * | 1978-09-18 | 1980-07-15 | Rca Corporation | Web position controller for web transport systems |
JPS57144633A (en) * | 1981-03-05 | 1982-09-07 | Inoue Japax Res Inc | Wire electrode feeder |
SE463667B (en) * | 1987-11-03 | 1991-01-07 | Profor Ab | UNROLLING DEVICE CONSIDERING TEMPORARY MATERIALS INCLUDING A BRAKE DEVICE CONTROLLED BY THE POSITION TENSION |
JPH01209139A (en) * | 1988-02-18 | 1989-08-22 | Tokyo Kikai Seisakusho Ltd | Guide roller apparatus in rotary press |
JPH0227623A (en) * | 1988-07-18 | 1990-01-30 | Sumitomo Wiring Syst Ltd | Manufacturing method and device for compressed conductor |
US4958111A (en) * | 1989-09-08 | 1990-09-18 | Gago Noel J | Tension and web guiding system |
JPH0629112B2 (en) * | 1990-10-08 | 1994-04-20 | 株式会社東京機械製作所 | Angle bar device |
JP2909294B2 (en) * | 1992-03-16 | 1999-06-23 | 日東グラスファイバー工業株式会社 | Method for producing glass yarn |
DE69312899T2 (en) * | 1992-12-25 | 1997-12-11 | Ishida Scale Mfg Co Ltd | Device for correcting a zigzag movement of an elongated running web |
JP3346254B2 (en) * | 1997-05-09 | 2002-11-18 | 住友電気工業株式会社 | Optical fiber |
DE29720235U1 (en) * | 1997-11-14 | 1998-01-22 | Océ Printing Systems GmbH, 85586 Poing | Device for transporting and temporarily storing a web-shaped record carrier in an electrographic printing or copying device |
US6199787B1 (en) * | 1998-03-02 | 2001-03-13 | Asif Jaffar | Method of transferring individual ends of yarns from a beam to individual cones |
DE19824798A1 (en) * | 1998-06-03 | 1999-12-09 | Indag Gmbh & Co Betriebs Kg | Device and method for feeding foils |
FR2781717B1 (en) * | 1998-07-29 | 2000-10-20 | Darlet Marchante Technologies | DEVICE FOR AUTOMATICALLY FEEDING A SYNTHETIC FILM TAPE INTO A CROSS-DRAWING MACHINE |
US6352257B1 (en) * | 1999-08-30 | 2002-03-05 | Asterisk, Inc. | Web stabilizer |
JP3382196B2 (en) * | 2000-01-05 | 2003-03-04 | 株式会社東京機械製作所 | Web paper position adjustment device |
US6467511B2 (en) * | 2000-07-06 | 2002-10-22 | Miliken & Company | Selvage yarn tensioning apparatus and method |
-
2002
- 2002-01-24 IT IT2002MI000120A patent/ITMI20020120A1/en unknown
-
2003
- 2003-01-20 EP EP03075183A patent/EP1331650B8/en not_active Expired - Lifetime
- 2003-01-20 DE DE60333509T patent/DE60333509D1/en not_active Expired - Lifetime
- 2003-01-20 AT AT03075183T patent/ATE475973T1/en not_active IP Right Cessation
- 2003-01-22 US US10/349,124 patent/US20030141400A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP1331650A3 (en) | 2003-12-03 |
EP1331650B8 (en) | 2010-09-01 |
ITMI20020120A1 (en) | 2003-07-24 |
DE60333509D1 (en) | 2010-09-09 |
EP1331650A2 (en) | 2003-07-30 |
ITMI20020120A0 (en) | 2002-01-24 |
US20030141400A1 (en) | 2003-07-31 |
ATE475973T1 (en) | 2010-08-15 |
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