EP3721456A1

EP3721456A1 - Method and device for producing a cable

Info

Publication number: EP3721456A1
Application number: EP18815662.4A
Authority: EP
Inventors: Paulo MARTINS
Original assignee: Leoni Bordnetz Systeme GmbH
Current assignee: Leoni Bordnetz Systeme GmbH
Priority date: 2017-12-07
Filing date: 2018-12-06
Publication date: 2020-10-14
Also published as: DE102017222107B4; DE102017222107A1; WO2019110761A1; US11626217B2; US20200388419A1; MX2020005954A

Abstract

The invention specifies a method and a device for producing a twisted cable (2) comprising at least two cable cores (4). The at least two cable cores (4) are unwound from at least one draw-off coil (6) and are twisted in a twisting unit (16) to form the twisted cable (2), wherein the twisting unit (16) has a first roller (18) and a second roller (20) and the at least two cable cores (4) are supplied to a twisting region (26) between the two rollers (18, 20) and are twisted by turning the rollers (18, 20) in the same direction.

Description

description

Method and device for producing a pipe

The invention relates to a method and an apparatus for producing a line.

Nowadays, twisted lines are often used for many technical applications, in particular for data cables. Twisted lines are a line that has twisted-together wires. The cable cores themselves are insulated conductors. The conductor often has a stranded conductor or a conductor wire. However, twisted wires often still do not necessarily have a cable jacket surrounding the wires. Such an additional cable jacket serves as a protective jacket against external influences, for example as mechanical, chemical and / or UV protection. Furthermore, twisted cables often - but also not necessarily - a shield against any electromagnetic interference occurring. Alternatively, so-called un-shielded twisted pair (UTP) cables are used, which have no shielding and achieve shielding from electromagnetic influences due to accurate twisting.

In addition, twisted lines are known, which are coated for cross-section reduction instead of the cable jacket, for example, with a protective lacquer. For example, from DE 10 2014 201 992 A1, an electrical line can be taken from at least two individual cores, which has an adhesive layer applied annularly. The adhesive layer is designed as a reactive coating, so that upon activation, a cohesive fixation with at the same time Training a protective jacket of the individual wires takes place. The adhesive layer thus replaces the outer jacket.

WO 2013/139 452 A1 furthermore discloses a variation of a lay length of twisted single cores for high-frequency signal transmissions. This reduces the effect of crosstalk.

For the production of such a twisted line usually so-called stranding devices are used. Twisted cables are also referred to as stranded cables.

From DE 74 40 528 U such a stranding device is known. The individual cores to be stranded can be fed to unwinding reels to a stranding head.

Frequently stranding devices are complex and elaborate.

Proceeding from this, the object of the invention is to specify a method and a device with the aid of which twisted lines can be easily produced.

The object is achieved by a method for producing a twisted line with the features of claim 1. Advantageous embodiments, developments and variants are the subject of the dependent claims.

The method is used to produce a twisted wire with at least two wires. In the present case, line cores are understood to mean especially individual conductors, for example stranded conductors, which are surrounded by insulation made of an insulating plastic. In this case, twisting is understood to mean especially a twisting (wrapping) about a twisting axis of at least two conductor wires. The twisting axis is oriented here in a production direction. The production direction is further defined by the direction (line longitudinal direction) direction) along which the wires or the twisted wire extend within a device for twisting.

The conductor wires are unwound from at least one draw-off coil, subsequently supplied to a twisting unit and twisted from this into a line. Alternatively, each single core is wound on its own withdrawal coil. For this purpose, the twisting unit has a first roller and a second roller. The rollers rotate around a rotation axis. The axis of rotation of the first roller and the axis of rotation of the second roller are oriented along the production direction. Under the direction of production is here understood that the axes of rotation run either parallel to the production direction or at least within a plane that is spanned by the production direction. The at least two conductor cores are fed to an intermediate region, referred to herein as Verdrillbereich, between the two rollers. The rotation of the rollers causes the wires to be twisted within the twisting area. In other words, the first roller and the second roller rotate in the same direction, i. in the same direction, for example clockwise. As a result, the rotational movements of the rollers in the intermediate region are opposite. The advantage is that the twisting of the wires is simplified. For example, in the case of a twist of two cable cores, a conductor is guided in one direction of rotation and the other conductor in the opposite direction of rotation.

Furthermore, the surfaces of the two rolls preferably comprise a material which has a high coefficient of adhesion, for example rubber. As a result, the twisting of the line wires is simplified and optimized due to the better adhesion to the rollers.

The twisting area between the two rollers is dimensioned in such a way that it is possible to feed the conductor wires, but these are detected by the two rollers. For example, the rollers are expediently arranged one another. Likewise, the line wires are arranged one above the other supplied to the Verdrillbereich. In other words, when supplying the at least two lead wires, an upper lead wire is detected by the "overhead" first roll and, analogously, a lower lead wire is grasped by the "lower" second roll and carried along in the respective rotary motion.

As a result, the conductor cores experience mutual displacement and are thus stranded in the direction of production. The advantage of this embodiment is a simple and cost-effective production of a twisted line, since no costly and / or complicated Verseilvorrich- lines.

According to a preferred embodiment, the first roller has a conical shape. In the present case, a conical shape is understood to mean that the value of a diameter of the first roller increases continuously and steadily in the direction of production. The second roller has, for example, a shape in the manner of a cylinder, so that it has an equal diameter over its length. By this configuration, a peripheral speed of the first conical roller is increased with increasing average, resulting in a stronger twisting of the wires. The twist of the wires is correlated with a lay length of the twisted wire. In this case, stroke length (often also referred to by the English word pitch) is understood to mean a length along a twisting axis which has a line core until it has been wound (twisted) from a starting position one complete revolution (of 360 °) about the twisting axis , Thus, a stronger twist results in a shortening of the lay length. In other words, the twist is inversely proportional to the lay length. By means of the conically shaped roller, shorter lay lengths are achieved while at the same time requiring less space and a less complex device compared to conventional stranding apparatus. The shorter a lay length of a line, the higher is the cohesion of the line wires, which in the Um- Increased stability and higher "Entdrill" security leads.

Conveniently, the lay length of the twisted line is adjusted by a longitudinal displacement of at least one of the two rollers, preferably the second roller. Longitudinal displacement is understood here to mean that, for example, the second roller is displaced in or counter to the direction of production. In this way, in particular, it is achieved that different lines with different lay lengths are produced by means of a single twisting unit.

This is based on the consideration that the lay length is determined by a roll end. In the present case, the term roll end is understood as meaning in particular a point at which, viewed in the direction of production, the twisting region ends between the two rolls. The roll end therefore defines a twist point at which the lay length is determined. By moving the rollers, this twisting point is displaced along the conical roller so that different lay lengths are set at the twisting point due to a different peripheral speed of the first conical roller.

After unwinding from the at least one draw-off coil, the lead wires are passed through a feed unit. The feed unit preferably has a main body extending in the direction of production with a number of feed channels. The conductor cores are each separated by a feed channel, in which, for example, vibrations that have occurred during unwinding are damped, before they subsequently enter the twisting region of the

Twisting unit to be supplied for twisting. Furthermore, it is ensured by the feed unit that the conductor wires are not individually twisted in one another or are already entangled with one another during unwinding.

Subsequent to the twisting, the twisted conductor wires are fixed to each other according to a preferred embodiment. According to an expedient development, the twisted line is guided after the twisting unit by a fixing unit, so that the wire cores materially fixed fixed, in particular glued. Preferably, the fixing unit is designed as a heating furnace, in which the conductor wires of the twisted wire are glued. For this purpose, the line wires, for example, a heat activatable coating, which is activated when passing the fuser and the line wires are thus adhesively bonded. By way of example, the line conductors are fixed to one another in a manner already known from DE 10 2014 201 992 A1.

Alternatively or additionally, a fixing medium, for example an adhesive or a lacquer, is applied to the twisted line within the fixing unit, which can be activated either by heat and / or by UV light, for example, and fixes the lead wires together with hardening.

To simplify unwinding of the wires, the take-off spools rotate. For this purpose, the draw-off coils are arranged, for example, on rotating plates.

Preferably, the twisted wire is formed as an unshielded twisted pair (UTP) wire. The finished twisted line therefore has no shielding and preferably also no jacket. UTP lines have proven to be particularly suitable in the area of data lines, especially in the low-cost area. Such UTP lines are e.g. used in the automotive sector. Alternatively, twisted lines are produced by means of the method described, which have up to 6 conductor wires.

Preferably, the method is designed as an endless process. In the present case, endless process is generally understood to mean a production process for strand-like elements. Specifically, in the present case, a method is understood in which the twisted line is wound up after fixing by the fixing unit, for example on a transport spool. The twisted wire is thus manufactured according to the general usage, for example, as a metering station. Endless is thus present here contrary to the actual meaning as the length of the Drill line defined which corresponds to a maximum on a transport coil windable length of twisted line.

The twisted conductor wires are preferably drawn off by means of a take-off unit arranged downstream of the twisting unit, as viewed in the production direction, and preferably subsequently wound onto a transport bobbin. The advantage of this embodiment is that, regardless of their number, the line wires are wound only by means of a single take-off unit from the draw-off coils, as viewed in the direction of production end is pulled on the twisted wire.

The object is further achieved according to the invention by a device for producing a twisted line having the features of claim 1. The device is designed in particular for producing a twisted line according to the method already described.

For this purpose, the device has at least one draw-off coil for unwinding at least two conductor wires. Furthermore, the device has a

Twisting unit on which the at least two wires can be fed.

For twisting the at least two conductor cores, the twisting unit has a first roller rotating about a first axis of rotation and a second roller rotating about a second axis of rotation. The first roller and the second roller are arranged side by side and each run along the production direction. Furthermore, the two rollers have between them a Verdrillbereich to which the at least two conductor wires are fed to a twisting. Furthermore, the rollers are designed for a rotation in the same direction. The device therefore has, in particular, a control device for driving the rollers, which is designed in such a way that, during operation, the two rollers rotate in the same direction.

The first roller preferably has a conical shape in particular, the value of a diameter of the first roller being considered in the production direction continuously and steadily increasing. The second roller has a shape in the manner of a cylinder.

Preferably, at least the second roller for adjusting a lay length of the twisted wire in and against the production direction is displaceable.

The advantages and preferred embodiments listed with regard to the method are to be transferred analogously to the device and the twisting unit and vice versa.

Embodiments of the invention are explained below with reference to the figures. These show partly in highly simplified representations:

1 shows a device for producing a twisted line,

A simplified sketched side view of a twisting unit and

3 shows a simplified side view of a twisting unit with shifted rollers.

In the figures, like-acting parts are represented by the same reference numerals.

In Fig. 1 is a rough sketched block diagram of the method is shown. For a better understanding, the method is explained below with reference to a device provided for this purpose. Objective explanations and descriptions thus provide a more detailed understanding of the process.

In the exemplary embodiment according to FIG. 1, the method steps for producing a twisted line 2 from two line cores 4 are shown. The cable cores 4 are wound on draw-off spools 6 in order to ensure space-saving storage on the one hand and easy transport of the conductor cores 4 on the other hand. The cable cores 4 are unwound from the draw-off coils 6. In order to facilitate the unwinding, the withdrawal coils 6 are rotatably mounted. In the exemplary embodiment, the draw-off coils 6 are arranged on turntables 8, which For example, by means of rotary elements 10 form the rotatable arrangement. In the present case, rotary element 10 is understood as meaning, for example, a shaft rotatable about an axis of rotation and / or a rotary bearing. In particular, the withdrawal coils 6 are passively rotatably mounted, ie they are not actively driven, for example by means of a motor.

After unwinding from the draw-off coils 6, the line wires 4 are led into a feed unit 12. In the feed unit 12, the line cores 4 are separated and guided through a feed channel 14, in which they experience reassurance. In the present case, reassuring is understood to mean that occurring oscillations of the line cores 4, which have occurred, for example, due to unwinding, be damped in the feed channel 14. For this purpose, the feed channel 14 has a diameter which, for example, is only 1 mm to 5 mm larger than the diameter of the line cores 4. This ensures that oscillating conductor cores 4 hit an inner wall of the feed channel 14 and are thus damped.

After passing through the feed unit 12, the line wires 4 are fed to a twisting unit 16. In the exemplary embodiment, the twisting unit 16 has a first roller 18 and a second roller 20, which are usually arranged in a housing, not shown here. The two rollers 18, 20 are each rotatably supported by a rotary shaft 22 and each rotate about an axis of rotation Ri, R ₂ , which corresponds to the respective rotary shaft 22. The rollers 18, 20 are arranged along a longitudinal or production direction 24. In the present case, production direction 24 is understood to mean in particular a direction along which the line wires 4 and the twisted line 2 extend within the device for twisting, ie within the region between the feed unit 12 and a region after the twisting unit 16. The individual method steps of FIG the line cores 4 to the twisted line 2 are executed along the production direction 24.

The first roller 18 has a conical shape. In the embodiment, the conical shape of the first roller 18 is formed such that a diameter Di When viewed in the direction of production 24, the first roller 18 has a continuously and continuously increasing value. In other words, the first roller 18 thickens in the direction of production 24. The second roller 20 has a shape in the manner of a cylinder. That is to say, a diameter D _{2 of} the second roller 20 has a constant value along a length L of the second roller 20 and in the direction of production 24. Due to the conical configuration, the first axis of rotation Ri is inclined, for example at an angle in the range of 10 ° to 30 ° to the production direction 24 and also to the second rotation axis R ₂ , which runs parallel to the production direction 24. The production direction 24 and the two axes of rotation Ri, R ₂ are arranged within a common plane, which, according to FIG. 1, is stretched through the plane of the paper. The lateral surfaces of the two rollers 18, 20 run parallel to one another and thus also parallel to the production direction 24 in the region in which they lie opposite one another.

Both rollers 18, 20 are therefore aligned in and along the production direction 24 and thus in the direction of the lines 4 and the twisted line 2. It is understood below that the rollers 18, 20 have a longitudinal extent, which is oriented in the direction of production 24. A respective axis of rotation Ri, R _{2 of} the rollers 18, 20 runs parallel to the production direction 24 and thus parallel to the conductor wires 4 and the twisted line 2. At least one directional component of the respective axis of rotation Ri, R _{2 runs} parallel to the production direction 24 understood that the axis of rotation Ri, R ₂ extends at least within a plane which is spanned by the production direction 24 and another direction. The axis of rotation Ri, R ₂ can thus also run obliquely inclined to the production direction 24. Under parallel, an exactly parallel alignment or also a substantially parallel orientation is obtained, for example with deviations of a maximum of +/- 20 °, preferably of a maximum of + / - 10 ° and more preferably understood by a maximum of +/- 5 ° from the exact parallel orientation.

The two rollers 18, 20 are thus arranged in the exemplary embodiment along or in the direction of the production direction 24. There is one between them Twisted region 26 is formed, in which the line wires 4 are introduced for twisting. The rollers 18,20 rotate in the same direction in the embodiment, ie in a same direction, for example in a clockwise direction. As a result, the rollers 18,20 in the twisting 26 are directed in opposite directions in their rotational movement.

In the following, the twisting of the line conductors 4 to the line 2 within the twisting unit 16 is briefly discussed: When the line conductors 4 are introduced into the twisting region 26, the rollers 18.20 "capture" a line core 4 in the exemplary embodiment and "lead" them into their movement with. In other words, the first roller 18 rotates in the

Twisting area 26, for example, to the left away (in the direction of production 24 considered). One of the cable cores 4 is detected at the initiation of the first roller 18 and guided to the left. Similarly, the second roller 20 rotates in the twisting region 26, for example, to the right and leads the other of the two wires 4 to the right. The wires 4 are thus twisted in itself. By alternating this operation and advancing the wires 4 inside the twisting unit 16, the twisted wire 2 is generated. In order to optimize the twisting of the wire cores 4 by means of the rollers 18, 20, the surfaces of the rollers 18, 20 have a material with a high static friction. By way of example, the surfaces of the rollers 18, 20 are designed to be rubber-coated in the exemplary embodiment. As a result of the increasing diameter Di of the first roller 18, as viewed in the direction of production 24, a circumferential speed of the first roller 18 increases in the direction of production 24. The increase in the peripheral speed results in an increase in the twist of the cable cores 4, resulting in a shorter lay length of the twisted line 2. The shorter lay length has the advantage that the twisted line 2 is more resistant to possible unthreading and thus the line wires 4 are more firmly twisted together compared to a line having a longer lay length. In particular, at least the second roller 20 is displaceable in and against a longitudinal direction. In the exemplary embodiment, the longitudinal direction corresponds to the production direction 24. The advantage of the longitudinal displaceability of the at least second roller 20 can be seen in the production of twisted lines 2 with different lay lengths. In Fig. 2 and Fig. 3 will be discussed in more detail.

After twisting the wires 4 in the twisting unit 16 to the line 2, this is passed into a fixing unit 28. In the fixing unit 28, the twisted leads 4 are fixed together, for example by gluing. For this purpose, for example, an adhesive within the fixing unit 28 is sprayed onto the twisted line 2 and cured, for example by means of heat. Alternatively, the wires 4 have an activatable coating, which is activated when passing through the fixing unit 28, for example, by heat and / or UV light and the twisted wires 4 fixed irreversibly together.

After passing through the fixing unit 28, the twisted line 2 is wound on a transport spool 30 to facilitate storage and transport.

The described method is embodied in the exemplary embodiment as a so-called endless method. That is, in particular, no individual sections of the twisted line 2 are made, but the twisted line 2 is manufactured in the manner of the meterware known in the general language. In the present case, a maximum absorption capacity of the transport spool 30 is understood to mean endless. Such transport coils 30 have, for example, a pick-up capacity for lines having a length in the range from 1000 m to 2000 m. Thus, the twisted line 2 produced by means of the described method is used in particular for a subsequent assembly, for example at a wholesaler and / or a customer. In the present case, subse- quently a period of time after the production of the twisted line 2 is understood. For winding onto the transport spool 30 and for unwinding from the take-off spools 6, a draw-off unit 32 is arranged between the twisting unit 16 and the transport spool 30. The twisted line 2 is passed through the trigger unit 32 and experiences in it a tensile force in the direction of production 24. The tensile force acts, for example, by means of withdrawal rollers 34 arranged laterally on the twisted line 2.

FIG. 2 shows a sketched side view of a twisting unit 16, in particular a first roller 18 and a second roller 20. The rollers 18, 20 are not shifted in relation to one another in the production direction 24 in FIG. 2, so that they are arranged flush with each other at a roller beginning 36 and a roller end 38. In particular, by the conical shape of the first roller 18, an increase in a peripheral speed of the first roller 18 is achieved. The higher peripheral speed also increases one

Twisting speed with which the wires 4 are stranded. The peripheral speed of the particular first roller 18 is inversely proportional to the lay length correlated, so that an increase in the peripheral speed has a shortening of the lay length result.

The lay length is determined in particular by the roll end 38. That is, the wires 4 are twisted in the Verdrillbereich 26 until they are passed out of the twisting unit 16 at the roll end 38. However, the line wires 4 are only twisted if they are arranged between the two rollers 18, 20. In the exemplary embodiment in FIG. 2, the line conductors 4 are twisted over the entire length L of the second roller 20. A maximum diameter D _max at the roll end 38 determines the peripheral speed and thus the twisting speed and the resulting lay length of the twisted line 2. For reasons of a more detailed description, a roller position according to FIG. 2 of the exemplary embodiment is also referred to herein as the maximum position M, since in such a roller position a maximum possible twisting of the cable cores 4 takes place with regard to the geometric properties of the rollers 18, 20. Due to the longitudinal displacement in and against the production direction 24, a roller position according to FIG. 3 is also possible. FIG. 3 shows a second roller 20 displaced by a deflection DI from the maximum position and counter to the direction of production 24. The twisting region 26 in which the cable cores 4 are twisted is reduced in such a roller position (also referred to herein as deflection position A). Thus, in the embodiment according to FIG. 3, not the diameter D _{max determines} the peripheral speed and thus also the twisting speed. In FIG. 3, the twisting region 26 required for the twisting ends at a deflection about DI from the maximum position M. Thus, the diameter D _A at this point S defines the circumferential speed and thus the twisting speed and the recoil length of the twisted line resulting therefrom 2 firmly. Due to the fact that the diameter D _{A has} a smaller value than the diameter D _max , consequently, the peripheral speed at the point - also referred to as Verdrillpunkt V - has a lower value than at the roll end 38. This in turn leads to a longer lay length of Twisted line 2 in comparison to the twisted line 2 produced with the roll position M.

Alternatively, the first roller 18 is displaceable in and against the production direction 24. Due to the configuration of the longitudinal displaceability of the at least second roller 20, an individual production of twisted lines 2 with respect to their lay lengths is achieved with only one twisting unit. The described method has the advantage that such twisted lines can be produced with it in a simple and cost-effective manner.

LIST OF REFERENCE NUMBERS

2 twisted wire

4 wires

6 extraction coils

8 turntables

10 rotary element

12 feed unit

14 feed channel

16 twisting unit

18 first roller

20 second roller

22 rotary shaft

24 production direction

26 Twisting area

28 fuser unit

30 transport coil

32 deduction unit

34 pick rollers

36 start of roll

38 roll end

A deflection position

Di diameter of the first roller

D ₂ diameter of the second roller

D _A twist diameter with shifted second roll D _max maximum twist diameter

L length of the second roller

M maximum position

DI displacement of the second roller

R -i rotation axis of the first roll

R ₂ rotation axis of the second roller

V twist point

Claims

claims

1. A method for producing a twisted line (2) with at least two conductor cores (4), wherein the at least two conductor cores (4) of at least one take-off reel (6) are unwound and in a twisting unit (16) to the twisted line ( 2) to be twisted,

characterized,

in that the twisting unit (16) has a first roller (18) and a second roller (20) and the at least two cable cores (4) have a first roller (18)

Twisting area (26) between the two rollers (18,20) are fed and twisted by a same direction rotation of the rollers (18,20).

2. Method according to the preceding claim,

characterized,

the first roller (18) has a conical shape.

3. Method according to one of the two preceding claims,

characterized,

in that a stroke length of the twisted line (2) is set by a longitudinal displaceability of at least one roller (18, 20).

4. The method according to any one of the preceding claims,

characterized,

the at least two conductor cores (4), after unwinding and before twisting, are fed to a feed unit (12) which passes through the at least two conductor cores (4) separately.

5. The method according to any one of the preceding claims,

characterized,

that the cable cores (4) are fixed after twisting.

6. Method according to the preceding claim,

characterized, that the twisted line (2) after twisting through a fixing unit (28) is guided, in which the conductor wires (4) are glued together.

7. The method according to any one of the preceding claims,

characterized,

that the withdrawal coils (6) rotate.

8. The method according to any one of the preceding claims,

characterized,

that the twisted line (2) is formed as a UTP line.

9. The method according to any one of the preceding claims,

characterized,

that it is designed as an endless process.

10. The method according to any one of the preceding claims,

characterized,

in that the twisted conductor wires (2) are pulled off by means of a take-off unit (32) arranged downstream of the twisting unit (16).

11. Device for producing a twisted line (2) by means of a method, in particular according to one of the preceding claims, the device extending along a production direction (24) and comprising:

- At least one take-off reel for unwinding at least two line vein (4) and in the production direction (24) below

a twisting unit (16), to which the at least two lead wires can be fed,

characterized,

in that the twisting unit (16) has a first roller (18) rotating about a first axis of rotation (Ri) and a second roller (20) rotating about a second axis of rotation (R ₂ ),

the two rollers (18, 20) extending along the direction of production (24) extend, are arranged side by side and between them have a Verdrillbereich (26) to which the line wires (4) len to be supplied to a Verdril.

12. Device according to the preceding claim,

characterized,

in that the first roller (18) has a conical shape and the second roller (20) has a shape in the manner of a cylinder.

13. Device according to one of the two preceding claims,

wherein at least the second roller (20) for adjusting a lay length of the twisted line (2) in and against the production direction (24) is displaceable.