EP3557592B1 - Device and method for twisting a first and second electrical single wire line to form a cable pair - Google Patents

Description

TECHNICAL AREA

The present disclosure relates to a device for twisting a first and second individual electrical line to form a line pair, as well as a method for twisting a first and second individual electrical line to form a line pair using a device described herein.

STATE OF THE ART

In certain applications, two individual electrical lines that are routed next to each other are twisted in cable processing devices. After twisting, the cables form a (twisted) pair of cables, which, for example, are routed into connector housings in a subsequent work step.

The EP 1 032 095 B1 Fig. 3 shows a conventional wire processing apparatus having an automatic twisting machine. Two individual electrical cables are pulled in and assembled at the same time. Assembling typically includes that the individual lines are cut to length, stripped and / or provided with contacts, grommets, etc. at at least one of their ends. The individual cables are pulled out after the leading cable ends have been assembled; the trailing cable ends are assembled; and then the lines are transferred to the actual twisting device. This has a stationary holding module that holds the trailing line ends during the twisting process, as well as a twisting head that can be moved in the direction of the cable and that grips the leading line ends and rotates (twisted) them together. During the twisting, the line pair shortens due to the mutual wrapping of the Single lines. A tensile force is measured, and the twisting head is adjusted according to the measured tensile force, whereby the shortening is taken into account.

The EP 3 012 841 A1 describes a device for feeding line ends to a further processing device. Here conductors are held at a small distance from one another and twisted. A single pair of gripper jaws holds both cable ends.

PROBLEMS TO BE SOLVED WITH THE REVELATION

The ones from the EP 3 012 841 A1 known procedure makes it difficult to transfer tensile forces that occur during the twisting to the individual lines. A clamping force that the pair of gripper jaws applies to the individual lines can only be increased to a limited extent in order to ensure a secure hold without the individual lines being damaged, for example deformed, which results in a reduction in the quality of the line pair.

It is an object of the present disclosure to specify a device or a method for twisting a first and second individual electrical line to form a line pair which ensures a high quality of the twisted line pair.

SOLUTION OF PROBLEMS

According to the present disclosure, a device for twisting a first and second individual electrical line to form a line pair is specified.

According to one aspect, the device comprises a main twisting device and a post-twisting device with a stationary post-twisting module and a post-twisting module that is movable along a linear guide direction. Each of the post-twist modules each includes one Transfer unit for taking over and holding one end of the twisted line pair, wherein the transfer unit comprises a first line gripper for the first individual line and a second line gripper for the second individual line, a relative distance between the first line gripper and the second line gripper corresponding to a distance between the ends of the lines is changeable. At least one of the fixed post-twisting module and the portable post-twisting module is configured for post-twisting the respective held line pair.

"Post-twisting", "post-twisting device" etc. denote aspects which, in the course of an overall twisting process for a line pair, are chronologically subordinate to a main twisting sub-process. A main twisting process is carried out analogously to that in FIG EP 1 032 095 B1 described twisting process. Following the main twisting process, the individual lines in the line pair are in a tangled state over a large part of the extension of the line pair. However, the line pair is further spaced from one another at the respective line ends (typically both the leading line ends and the trailing line ends).

In accordance with the present disclosure, the transfer unit takes one end of the twisted wire pair and holds it. The first line gripper of the transfer unit holds the first individual line, and the second line gripper holds the second individual line. The distance between the first line gripper and the second line gripper is variable, specifically according to the distance between the ends of the individual lines. As a rule, the distance between the first line gripper and the second line gripper is reduced so that the distance between the ends of the individual lines is also correspondingly smaller.

Then the ends of the individual lines with reduced spacing are re-twisted. The re-twisted ends of the Cables in the twisted pair have a smaller distance after completion of the post-twisting with high quality.

Typically, the distance between the first line gripper and the second line gripper is programmably variable. A programmable change includes, for example, adapting the distance between the first line gripper and the second line gripper according to a predetermined or predeterminable line configuration (specification of a distance of a first intersection position, length of twist of the twist etc.) and / or according to a line quality (line cross-section, thickness of the insulation, etc.) .).

In embodiments, the first line gripper and / or the second line gripper is or are configured to fix the respective held individual line. Alternatively, at least one of the stationary post-twisting module and the portable post-twisting module comprises a fixing device which is configured for fixing the respective held individual line. Fixing, as used herein, includes holding to prepare for and / or perform the post-twisting process.

In embodiments, at least one of the stationary post-twisting module and the portable post-twisting module includes a post-twisting head. Each post-twisting head holds the two individual lines of the twisted line pair and executes a predetermined or specifiable, typically programmable, number of revolutions for the post-twisting.

In embodiments, at least one of the post-twisting heads is movable in the direction of the line pair, so that a tensile force is applied to the line pair. With the application of a tensile force, line parameters such as B. the lay length can also be guaranteed for the post-twisted line section at the end of the line. The at least one of the Post-twisting heads can be designed to be movable in a force-controlled manner in order to apply a predetermined or predetermined tensile force to the pair of lines.

In embodiments, the portable post-twisting module is designed as a carriage which is provided on a linear guide of the device and can be moved along the linear guide in the linear guide direction. A design as a linearly guided carriage enables a particularly simple and effective construction. The carriage can be moved by means of a toothed belt drive, which again simplifies the structure.

In embodiments, the portable post-twisting module further comprises a drive for moving a respective held end of the lines in the line direction. The drive is typically designed as a spindle drive.

In embodiments, the transfer unit further comprises a horizontal drive and a vertical drive, the horizontal drive and the vertical drive being configured such that they move at least one of the first and second line grippers vertically and horizontally in a plane at right angles to the cable axis. For example, the horizontal drive is a horizontal spindle drive. For example, the vertical drive is a vertical spindle drive.

According to a further aspect, a method for twisting a first and second individual electrical line into a line pair using a device described herein is specified. The method includes twisting the individual electrical lines with the main twisting module to obtain a twisted pair of lines; moving the line grippers of the transfer module to a position corresponding to an associated individual line of the twisted line pair; a transfer of the individual lines to the respective associated cable gripper; reducing the distance between the line grippers; bringing the twisted pair of wires to a post-twisted position; delivering the twisted pair of wires to the post-twisting heads of the post-twisting modules; and re-twisting the twisted pair of wires.

The method can be used to automate a post-twisting process with a reduced distance between the individual lines at the ends of the line pair. For example, the distance between the individual lines at one or both ends of the line pair can be specified via a user interface. It is also conceivable that a distance from a first crossing position of the individual lines at the respective end to the line end can be specified. The first crossing position of the individual lines is the position, starting from the respective end under consideration, at which the lines for the formation of the twisted state first contact one another or cross one another.

In embodiments, the twisted pair of lines is fixed by one of the line grippers or by a fixing gripper during re-twisting. This ensures a particularly simple and safe subsequent twisting.

In embodiments, before the twisted pair of lines is brought to the post-twisting position, the portable post-twisting module is moved in the direction of the stationary post-twisting module. The line pair is therefore relaxed before being spent. Relaxing the line pair reduces the risk that the individual lines being held will detach from the line grippers or their position will be changed.

In embodiments, a tensile force is exerted on the pair of lines to be twisted before the twisted pair of lines is re-twisted and during the re-twisting.

BRIEF DESCRIPTION OF THE DRAWINGS

• Fig. 1 ein verdrilltes Leitungspaar zum Verdeutlichen der hierin verwendeten Begriffe;
• Fig. 2 ein weiteres verdrilltes Leitungspaar zum Verdeutlichen der hierin verwendeten Begriffe;
• Fig. 3 ein weiteres verdrilltes Leitungspaar zum Verdeutlichen der hierin verwendeten Begriffe;
• Fig. 4 eine Draufsicht auf eine Vorrichtung zum Verdrillen einer ersten und zweiten elektrischen Einzelleitung ohne eine Nachverdrilleinrichtung, zum Erläutern der hierin offenbarten Aspekte;
• Fig. 5 eine Draufsicht auf einen Teil einer Vorrichtung zum Verdrillen einer ersten und zweiten elektrischen Einzelleitung, mit einer Nachverdrilleinrichtung;
• Fig. 6 einen Teil der Vorrichtung 100 in einer Ansicht von schräg unten;
• Fig. 7 in perspektivischer Ansicht das ortsveränderliche Nachverdrillmodul aus einer ersten Richtung;
• Fig. 8 in perspektivischer Ansicht das ortsveränderliche Nachverdrillmodul aus einer zweiten Richtung;
• Fig. 9 in perspektivischer Ansicht das ortsfeste Nachverdrillmodul 170 aus einer ersten Richtung,
• Fig. 10 in perspektivischer Ansicht das ortsfeste Nachverdrillmodul 170 aus einer zweiten Richtung,
• Fig. 11 eine kombinierte Ansicht einer hierin beschriebenen Vorrichtung während der Ausführung eines hierin beschriebenen Verfahrens;
• Fig. 12 eine kombinierte Ansicht einer hierin beschriebenen Vorrichtung während der Ausführung eines hierin beschriebenen Verfahrens;
• Fig. 13 eine kombinierte Ansicht einer hierin beschriebenen Vorrichtung während der Ausführung eines hierin beschriebenen Verfahrens;
• Fig. 14 eine kombinierte Ansicht einer hierin beschriebenen Vorrichtung während der Ausführung eines hierin beschriebenen Verfahrens;
• Fig. 15 eine kombinierte Ansicht einer hierin beschriebenen Vorrichtung während der Ausführung eines hierin beschriebenen Verfahrens;
• Fig. 16 Ausschnittsvergrößerungen aus den Ansichten gemäß Fig. 13-15;
• Fig. 17 eine kombinierte Ansicht einer hierin beschriebenen Vorrichtung während der Ausführung eines hierin beschriebenen Verfahrens;
• Fig. 18 eine kombinierte Ansicht einer hierin beschriebenen Vorrichtung während der Ausführung eines hierin beschriebenen Verfahrens;
• Fig. 19 eine kombinierte Ansicht einer hierin beschriebenen Vorrichtung während der Ausführung eines hierin beschriebenen Verfahrens;
• Fig. 20 eine kombinierte Ansicht einer hierin beschriebenen Vorrichtung während der Ausführung eines hierin beschriebenen Verfahrens.

Embodiments of the disclosure are explained in more detail below with reference to the accompanying drawings. Show it:

• Fig. 1 a twisted pair to clarify the terms used herein;
• Fig. 2 another twisted pair wire to clarify the terms used herein;
• Fig. 3 another twisted pair wire to clarify the terms used herein;
• Fig. 4 a plan view of a device for twisting a first and second electrical individual line without a post-twisting device, for explaining the aspects disclosed herein;
• Fig. 5 a plan view of part of a device for twisting a first and second electrical single line, with a post-twisting device;
• Fig. 6 part of the device 100 in a view obliquely from below;
• Fig. 7 in a perspective view of the portable post-twisting module from a first direction;
• Fig. 8 in a perspective view of the portable post-twisting module from a second direction;
• Fig. 9 in a perspective view of the fixed post-twisting module 170 from a first direction,
• Fig. 10 a perspective view of the stationary post-twisting module 170 from a second direction,
• Fig. 11 a combined view of an apparatus described herein during the execution of a method described herein;
• Fig. 12 a combined view of an apparatus described herein during the execution of a method described herein;
• Fig. 13 a combined view of an apparatus described herein during the execution of a method described herein;
• Fig. 14 a combined view of an apparatus described herein during the execution of a method described herein;
• Fig. 15 a combined view of an apparatus described herein during the execution of a method described herein;
• Fig. 16 Detail enlargements from the views according to Fig. 13-15 ;
• Fig. 17 a combined view of an apparatus described herein during the execution of a method described herein;
• Fig. 18 a combined view of an apparatus described herein during the execution of a method described herein;
• Fig. 19 a combined view of an apparatus described herein during the execution of a method described herein;
• Fig. 20 a combined view of an apparatus described herein during execution of a method described herein.

DESCRIPTION OF EMBODIMENTS

Fig. 1 shows a twisted line pair 10 comprising a first individual line 11 and a second individual line 12. One end 16 of the line pair 10 is defined as the leading end, which is used in a device 100 for twisting described later to be led. The other end 17 of the line pair is defined as the trailing end.

At the trailing end 17, a first contact 13 and a second contact 14 are attached to lines 11 and 12, respectively. A region between the ends 16, 17 is twisted, i.e. H. the lines 11, 12 wrap around one another. Starting from the leading end 16, the lines 11, 12 intersect or cross for the first time at a first crossing point P2. Similarly, the lines 11, 12, starting from the trailing end 17, overlap or cross one another for the first time at a first crossing point P1.

For the purpose of explanation, a portion of the line pair 10 is shown in FIG Fig. 2 shown again. The untwisted ends of the individual lines 11, 12 at the trailing line end have a length a1. The distance between two similar crossovers or overlaps of the lines 11, 12 in the twisted area is specified as the lay length a2.

The distance a3 is defined in a direction which is essentially perpendicular to the direction of the line pair 10 in which the distances a1, a2 are defined. The distance a3 indicates the distance between the individual lines 11, 12 at each end, in Fig. 2 at the trailing end 17. A corresponding distance a3, which is equal to or different from the distance a3 at the trailing end, is also defined at the leading end 16.

Fig. 3 shows the sub-area of the power pair 10 Fig. 2 . In Fig. 3 is the distance a3 between the individual lines 11, 12 opposite Fig. 2 decreased.

In Fig. 4 For explanatory purposes, a device 100 for twisting the individual electrical lines 11, 12 is shown without a post-twisting device.

In Fig. 4 the leading end 16 of the individual lines 11, 12 is guided into a processing region 101, from where it continues can be guided on a guide rail 105 along a machine axis. Processing modules 103, 104, 105, 106 can carry out manipulations on the lines 11, 12 in the processing region 101.

The leading ends of the individual lines 11, 12 are stripped by a cutting head 102 and fed to processing modules 103, 104 one after the other on one side with a first swivel unit 107. For example, a grommet and a contact can be mounted at the end of the conductor.

The first swivel unit 107 then brings the line pair 10 back in the direction of the machine axis. There, its individual lines 11, 12 are passed through until they can be gripped by a pull-out slide 109. The individual lines 11, 12 are pulled out, depending on the desired line length, from the pull-out slide 109 along the guide rail 105 in the linear guide direction defined by the.

The individual lines 11, 12 are then gripped by a second swivel unit 108 and cut through and stripped by the cutting head 102. The trailing conductor ends are fed from the second pivoting unit 108 to the processing modules 105, 106 on the other side and finished, i.e. H. for example again each provided with a grommet and a contact.

A transfer module 111 takes over the trailing end 17 of the individual lines 11, 12, brings them to a smaller distance and, after a pivoting movement, transfers them to a holding module 110. A transfer module 112 transfers the leading end 16 of the individual lines 11, 12 to a twisting head 120 Twisting head 120 is in device 100 according to Fig. 4 rotated, whereby it is moved in the direction of the holding module 110 in a tension-controlled manner. The twisting head 120 forms a main twisting device with which, for example, the in Fig. 2 The line pair shown is available, which has a comparatively large distance a3 between the individual lines 11, 12 at the respective ends 16 and 17, respectively.

In Fig. 5 the device 100 is off Fig. 4 Shown in detail, a post-twisting device 160 being additionally provided. The post-twisting device 160 comprises a stationary post-twister module 170 and a portable post-twister module 180. The portable post-twister module 180 is movable along a linear guide provided separately on the guide rail 105, which defines the linear guide direction for the portable post-twister module 180. The linear guide direction is parallel to the direction of movement of the twisting head 120 or the pull-out slide 109.

Fig. 6 shows part of the device 100 in a view obliquely from below. In Fig. 6 the holding module 110 and the twisting head 120 are shown by way of example. Instead of the holding module 110, it is also conceivable to provide a further twisting head in addition to the twisting head 120.

The stationary post-twisting module 170 has a post-twisting head 173 and a transfer unit 172. Correspondingly, the portable post-twisting module 180 has a post-twisting head 183 and a transfer unit 182. In the in Fig. 6 In the illustrated embodiment, the stationary post-twisting module 170 also has a fixing gripper 171. The portable post-twisting module 180 can correspondingly have a fixing gripper (not shown).

The transfer units 172, 182 are configured in such a way that they take over the line pair 10 twisted by means of the twisting head 120 and transfer it to the respective post-twisting head 173 or 183. The fixing grippers 171, 181, if provided, hold the line pair 10 during the post-twisting process.

The portable post-twisting module 180 is designed as a carriage that can be moved on the linear guide 105 by a toothed belt drive (not shown). Depending on the cable to be twisted, different end positions of the twisting head 120 can thus be approached.

Fig. 7 shows a perspective view of the portable post-twisting module 180 from a first direction, Fig. 8 shows it from a second direction. The post-twisting head 183 can be moved with a twisting motor 188 via a toothed belt drive. In addition, the post-twisting head 183 can be moved in the cable direction via a first spindle drive 189. The transfer unit 182 carries a first line gripper 184 and a second line gripper 185, which serve to grasp the ends of the individual lines 11, 12 which are located at a wide distance a3 from one another. One of the line grippers 183, 185 is attached to a linear axis, with which the distance between the two line grippers can be changed in a programmable manner. The linear axis can be designed as a servo axis.

The transfer unit 182 has a horizontal spindle drive 186b and a vertical spindle drive 186a. The line grippers 184, 185 can thus be moved at right angles to the cable axis in a plane, vertically and horizontally. In addition to the spindle drives with associated servomotors and guides, other variants are also conceivable for executing these movements, such as B. pistonless pneumatic cylinders.

Fig. 9 shows a perspective view of the fixed post-twisting module 170 from a first direction, Fig. 10 shows it from a second direction. The stationary post-twisting module 170 has the post-twisting head 173 and the transfer unit 172. This module does not need to be moved; therefore these components are not connected to one another and are individually attached to the machine frame. The post-twist head 173 is constructed similar to the post-twist head 183 and movable in the direction of the twisted line pair 10 by means of a pneumatic cylinder. The transfer unit 172 has a first line gripper 174 and a second line gripper 175, the spacing of which can be changed with a linear axis 177.

The line pair 10 can be fixed during the post-twisting by a line gripper 174, 175 or by the separately provided fixing gripper 171.

The transfer unit 172 has three axes of movement: a horizontal toothed belt drive 178 and a first vertical spindle drive 176a move the line grippers 174, 175 and the fixing gripper 171 together in a plane at right angles to the axis of the line pair 10. A horizontal spindle drive 176b moves the line grippers 174, 175 alone parallel to the axis of the line pair 10.

The Figures 11 to 19 each show the device 100 at different points in time when performing a method described herein. The parts (a) of the Figs. 11-15 , 17 to 20 in the respective upper areas show a view with the direction from a twisting axis V to a post-twisting axis; the parts (b) of the Figs. 11-15 , 17 to 20 show a view from below in the respective lower areas. It goes without saying that the in Figs. 11-20 The method sequence described by way of example can be adapted if only one of the leading end 16 and the trailing end 17 is to be re-twisted, in that the conductor ends are not brought together and the corresponding end is not re-twisted.

In Fig. 11 the starting position is shown. In the following figures not provided with reference numerals correspond to those in Fig. 11 .

In Fig. 11 is a pre-assembled and twisted with the twisting head 120 line pair 10 from a first electrical individual line 11 and a second electrical individual line 12 held in the holding module 110. The distance a3 between the first individual electrical line 11 and the second individual electrical line 12 is comparatively large. The line grippers 184, 185 of the portable post-twisting module 180 and the line grippers 174, 175 of the stationary post-twisting module 170 are in a waiting position above and between the twisting axis V and the post-twisting axis N.

In the in Fig. 12 The first step shown, the two pairs of line grippers 174, 175; 184, 185 move horizontally until they are over the respective cable ends. The line grippers 174, 175; 184, 185 can be moved to their respective positions one after the other or simultaneously in the cable direction.

In the in Fig. 13 The next step shown are the wire gripper pairs 174, 175; 184, 185 and are then at the level of the twist axis V.

In the in Fig. 14 In the step shown, the distance between the line gripper 174 and the line gripper 175 or the distance between the line gripper 184 and the line gripper 185 is reduced and the line gripper pair 184, 185 is shifted somewhat horizontally in order to grip the two line ends 11, 12. Then the cable is transferred to the line grippers 184, 185 or 174, 175 by the two pairs of line grippers 174, 175; 184, 185 are closed and then the cable grippers of the twisting head and the holding module 110 are opened.

As in Fig. 15 shown, after the handover, the power ends 11, 12 are brought to the desired spacing for subsequent twisting. For this purpose, the distance between the respective line grippers 174 to 175 or 184 to 185 is further reduced by moving the respective linear axes further.

Fig. 16 shows in (a) - (c) an enlarged detail of the line gripper 184, 185 of the portable post-twisting module 180, with (a) an enlargement from Fig. 13 represents, (b) an enlargement Fig. 14 and (c) an enlargement Fig. 15 represents. The line grippers 184, 185 are located in Fig. 16 in (a) - (c) each in different positions.

Fig. 17 indicates the Fig. 15 subsequent step. In Fig. 17 the line pair 10 is relaxed by moving the portable post-twisting module 180 in the direction of the stationary post-twisting module 170. Relaxing the line pair 10 reduces the risk that the line ends when the line pair 10 is subsequently moved out of the line grippers 174, 175; 184, 185 slide or be moved in it.

The two transfer units 172, 182 then move the line pair 10 to the post-twisting axis N, a vertical movement first being carried out on the stationary post-twisting module 170 so that it moves out of the area of the open holding module 110. The two post-twisting heads 173, 183 are in an angular position that allows the line pair 10 to be pushed into the opened line grippers 174, 175; 184, 185 of the subsequent twisting heads 173, 183 to be introduced.

Fig. 18 shows the end position of the two transfer units. From here on, the twisting head and the holding module are no longer shown in the figures.

Next, the line pair 10 is prepared for re-twisting. For this purpose, the line pair 10 is stretched again and gripped by the post-twisting heads 173, 183. Then the line grippers 174, 175; 184, 185 open.

Before re-twisting, both ends of the line pair 10 are fixed. In the case of the stationary post-twisting module 170, this is done by the fixing gripper 171. After a position correction of the transfer unit 172 in the horizontal direction, the fixing gripper 171 is closed, whereby the line pair 10 is gripped. In the case of the portable post-twisting module 180, the fixation is carried out by one of the two line grippers 184, 185, which is correctly positioned by a horizontal movement of the transfer unit 182 in order to clamp the entire line pair 10 when it is closed.

Fig. 19 shows the situation immediately before re-twisting. The line ends of the stretched line pair 10 are held in the two post-twisting heads 173, 183 and the line pair 10 is fixed with the fixing gripper 171 and a line gripper 184, 185.

If necessary, a tensile force can be applied to the lines 11, 12 to be twisted.

The actual post-twisting takes place by rotating the post-twisting heads 173, 183. For example, a machine control (not shown) is provided, the control system calculates a calculated number of revolutions for the post-twisting heads 173, 183 from the known process parameters (lay length, outer diameter of the lead, etc.) and controls them accordingly.

Fig. 20 shows the device with the finished pair of lines 10 with the two post-twisted cable ends 16, 17.

The fixation can be released and the line pair 10 can be dropped after opening the twisting heads 173, 183, the twisting heads 173, 183 being brought into the correct angular position beforehand. It is also conceivable to first open the post-twisting heads 173, 183 and move the cable through the transfer units 172, 182 before it is deposited.

Claims (13)

1. An apparatus (100) for twisting a first and a second single electrical wire (11, 12) to form a cable pair (10), wherein the device (100) comprises a main twisting device (120) and a retwisting device (160) with a stationary retwisting module (170) and a retwisting module (180) that is movable along a linear guide direction,
   wherein each of the retwisting modules (170, 180) comprises a transfer unit (172, 182) for transferring and holding an end of the twisted cable pair (10), wherein the transfer unit (172, 182) comprises a first wire gripper (174, 184) for the first single electrical wire (11) and a second wire gripper (175, 185) for the second single electrical wire (12), wherein a relative distance between the first wire gripper and the second wire gripper can be changed, typically changed programmably, according to a distance (a3) between the ends of the wires (11, 12),
   wherein at least one of the stationary retwisting module (170) and the movable retwisting module (180) is configured for retwisting of the respective held cable pair (10).
2. The apparatus according to Claim 1, wherein the first wire gripper (174, 184) and/or the second wire gripper (175, 185) is configured to fix the respective held single electrical wire (11, 12).
3. The apparatus according to Claim 1, wherein at least one of the stationary retwisting module (170) and the movable retwisting module (180) comprises a fixing device, typically a fixing gripper device (171, 181) which is configured to fix the respective held single electrical wire (11, 12).
4. The apparatus according to any one of the preceding claims, wherein at least one of the stationary retwisting module (170) and the movable retwisting module (180) comprises a retwisting head (173, 183), wherein each retwisting head (173, 183) holds both single electrical wires (11, 12) of the twisted cable pair (10) and performs a predefined or predefinable, typically programmable number of revolutions for the retwisting.
5. The apparatus according to Claim 4, wherein at least one of the retwisting heads (173, 183) is movable in the extension direction of the cable pair (10), typically movable under feedback-controlled force, so that a tensile force is exerted on the cable pair.
6. The apparatus according to any one of the preceding claims, wherein the movable retwisting module (180) is embodied as a carriage which is provided on a linear guide (105) of the device and movable along the linear guide (105) in guided manner in the linear guide direction.
7. The apparatus according to Claim 6, wherein the carriage is movable by means of a toothed belt drive.
8. The apparatus according to any one of the preceding claims, wherein the movable retwisting module (180) further comprises a drive unit, typically a spindle drive, for moving a respective held end of the wires (11, 12) in the direction of the wire.
9. The apparatus according to any one of the preceding claims, wherein the transfer unit (171, 181) further comprises a horizontal drive unit, typically a horizontal spindle drive, and a vertical drive unit, typically a vertical spindle drive, wherein the horizontal drive unit and the vertical drive unit are configured in such manner that they move at least one of the first and second wire grippers vertically and horizontally in a plane aligned at right angles to the cable axis.
10. Method for twisting a first and a second single electrical wire (11, 12) to form a cable pair (10) using an apparatus (100) according to any one of Claims 1 to 9, wherein the method comprises the following:

    twisting the single electrical wires (11, 12) with the main twisting module (120) to obtain a twisted cable pair (10);

    moving the wire grippers (174, 175; 184, 185) of the transfer module (172, 182) to a position corresponding to an associated single electrical wire (11, 12) of the twisted cable pair (10);

    transferring the single electrical wires (11, 12) to the respectively associated wire grippers (174, 175; 184, 185);

    reducing the distance between the wire grippers (174, 175; 184, 185);

    bringing the twisted cable pair (10) to a retwisting position;

    transferring the twisted cable pair to the retwisting heads (173, 183) of the retwisting modules (170, 180);

    performing retwisting of the twisted cable pair (10).
11. Method according to Claim 10, wherein during the retwisting the twisted cable pair (10) is fixed by one of the wire grippers (174, 175; 184, 185) or by a fixing gripper (171, 181) .
12. Method according to Claim 10 or 11, further comprising:
    before bringing the twisted cable pair (10) to the retwisting position: moving the movable retwisting module (180) towards the stationary retwisting module (170).
13. Method according to any one of Claims 10 to 12 further comprising:
    before the retwisting of the twisted cable pair (10) and during the retwisting: exerting a tensile force on the cable pair (10) that is to be twisted.

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