EP0917746A1

EP0917746A1 - Method and device for the twisting of at least two single-lines

Info

Publication number: EP0917746A1
Application number: EP97935571A
Authority: EP
Inventors: Klaus FÜCHSL; Fritz DRÄXLMAIER
Original assignee: Lisa Draexlmaier GmbH; Gluth Systemtechnik GmbH
Current assignee: Lisa Draexlmaier GmbH; Gluth Systemtechnik GmbH
Priority date: 1996-08-06
Filing date: 1997-08-05
Publication date: 1999-05-26
Anticipated expiration: 2017-08-05
Also published as: DE19631770C2; DE19631770A1; EP0917746B1; US6167919B1; DE59702766D1; ES2154468T3; WO1998006155A1

Abstract

The invention relates to a method for the twisting of at least two single-lines and comprises the following steps: i) clamping of one of the ends (33) of individual lines (15,16) deviated along a certain length, in a separate untwisting device (10) rotating parallel to a twisting axis (A), ii) clamping of the other ends (33) of the individual lines in a separate twisting device (8), arranged so that they can rotate together on the twisting axis (A), iii) provision of a drill shuttle (6) in between the essentially taut lines (15,16) and iv) rotation of the twisting devices (8) on the twisting axis (A) and rotation, in the same direction, of the untwisting devices (10) about the axis of the individual lines (15,16). This method enables the production of twisted individual lines to be realized under more flexible production conditions. The invention also relates to a device for the twisting of at least two individual lines.

Description

METHOD AND TWISTING DEVICE FOR TWISTING AT LEAST TWO SINGLE CABLES

The present invention relates to a method for twisting at least two individual lines and a twisting device for this purpose.

Twisted cables are widely used for a wide variety of purposes where appropriate electromagnetic compatibility (EMC) is desired. One area of application is the use of such cables in automobile construction for e.g. Loudspeaker or airbag lines. So far, the twisted lines have always been twisted endlessly by the line manufacturer and sold rolled up in barrels. In such endless twisting processes, the cable drums with the "endless" individual lines are rotatably attached to the twisting head and rotate with it around the twisting axis. The twisted cables are then cut to length for the corresponding purpose, the ends are partially re-twisted and fitted with appropriate equipment, e.g. Contact connections, stop parts, single wire seals, etc. equipped. These processes are very labor-intensive and therefore costly. Furthermore, the inventory of twisted lines must be relatively high, since these are manufactured with different diameters, twisting pitches, number of individual lines, different color combinations of the individual lines, etc. for the corresponding purposes.

It is now the object of the present invention to provide a method for twisting individual lines which makes the manufacture of twisted lines more attractive for the cable assembler in terms of labor, production and storage costs.

According to the invention, this object is achieved by a method with the following steps: Clamping the one line ends of individual lines cut to a certain length in a separate EntdriUspannaufnahme each rotatable substantially parallel to a twist axis;

Clamping the other line ends of the individual lines in the separate twisting clamping receptacles, which are arranged together rotatable about the twisting axis;

Placing a drill ship between the substantially tensioned lines; and

Rotating the twist clamping fixture together around the twist axis and rotating the twist clamping fixtures in each case around the line axis of the respective lines.

The enormous advantage of this method is that individual lines can be cut to a certain length before being twisted, possibly stripped and provided with various components. The ends of the lines, which are possibly provided with attachments, are then inserted into the corresponding clamping receptacles and clamped, preferably one end of the line being assigned to each clamping receptacle. The twist tension receptacles and the drill ship then take care of twisting the individual lines, while the twist tension receptacles can remain arranged essentially parallel to the twist axis. Since the individual lines are rotated about their axis with each rotation around the twist axis due to the joint rotational movement of the twist-tension receptacles, the twist-tension receptacles ensure a correspondingly rotating movement of each individual line so that they do not twist.

The material inventories of the bearings can be reduced by the method according to the invention, since it is no longer necessary to keep all combinations between the line color and cross-section in stock. The required cable pairs can now be produced from standard cables according to the wishes of the cable assembler. In contrast to the processing of Conventionally twisted cables do not cause any problems when untwisting, smoothing, unwinding from the drums, cutting, cutting to length, stripping, attaching and installing seals. Special machines are required to process already twisted cables in this way. The method according to the invention allows processing on standard machines, since twisting can take place as the last manufacturing step. In this context, there are also improvements in process reliability and in the quality of the twisted cables. With this method, pre-assembled cables with attachments at the cable ends of any kind can be processed. The untwisting process ensures that there are no torsional loads at the ends of the individual lines.

Conveniently, the drill ship can be arranged in the vicinity of the twist receptacles between the lines and can be moved in the direction of the untwist tension receptacles during the twisting process. In this way, more precise control of the twisting process can be achieved, since this begins as close as possible to the twisting clamping receptacles.

Furthermore, the speed of movement of the drill ship can be controlled as a function of the speed of the twist clamping receptacles around the twist axis. This allows the twisting pitch of the individual lines to be varied. This even goes so far that a cable twisted from individual lines can have different sections with different twist pitches. In order to keep the tensile stresses which are exerted on the individual lines during the twisting process essentially constant, the untwisting clamping receptacles can be moved towards the twisting clamping receptacles in a controlled manner during the twisting process. By twisting the individual cables of a certain length, it is understandable that depending on the twisting pitch, only cables with a smaller final length can be produced. This "shrinkage" is preferably taken into account by the controlled process of the twist clamping receptacles. Of course, the untwisting clamping receptacles can also be moved relative to the twisting clamping receptacles. It has shown that a certain bias on the individual lines favors the twisting process.

In a further variant, it is proposed that the individual lines be cut to length and / or clamped in automatically. Correspondingly, further intermediate steps can be added if the individual lines are still pre-assembled, e.g. through appropriate connections at the ends etc. This measure is particularly useful for twisted cables with large quantities.

After the one line ends have been clamped in order to pull the lines into a twisting device, the untwisting clamping receptacles can advantageously be moved away from the twisting clamping receptacles along the twisting axis. The untwisting fixtures are thus used as a feed device for the individual lines.

It can be provided that the particular draw-in length is less than the maximum distance between the untwist and twist clamp receptacles at the start of the twist process and that after the other ends have been clamped in the twist clamp receptacles, the lines are tensioned by repeating the untwist clamp receptacles. On the one hand, this process facilitates the insertion of the other ends of the individual lines, since these can still be inserted relatively loosely and without pretensioning in the twist-tension receptacles, and on the other hand, a deliberate preload is then applied to the individual lines by the process of untwisting tensioning receptacles.

The lines can advantageously be twisted more closely in the area of their line ends than in the rest of the area. This tighter twisting in the area of their line ends represents a kind of knotting and better protection of the total twisting. This makes it more difficult to unintentionally twist the lines.

Furthermore, the invention relates to a twisting device for twisting at least two individual lines. This comprises at least two untwist clamping receptacles for clamping line ends, each of which is separately rotatable, essentially parallel to a twisting axis, at least two twisting clamping receptacles arranged opposite the untwisting clamping receptacles for clamping the other line ends, which are jointly rotatable about the twisting axis, and one between them Lines positionable drill ship, wherein the untwist clamping receptacles and the twisting clamping receptacles are movable relative to each other along the twist axis.

With this device, the method according to the invention and the advantages on which it is based can be carried out in an advantageous manner. This device has a very narrow construction and only has to have the predetermined length required for the twisting of the individual lines.

Conveniently, the untwisting clamping receptacles can be arranged on a common untwisting carriage by means of a linear drive along the twisting axis. The linear drive can be controlled very precisely, but can also drive relatively high feed speeds. The drive for the untwisting fixtures is then preferably also on the final twisting slide.

The drill ship can also be arranged to be movable on a slide by means of a linear drive along the twist axis, as a result of which the twist pitch can be adjusted more precisely since the line section which has just been twisted is always located directly on the drill ship. To simplify the construction of the device, the twist clamping receptacles can be arranged on a common carrier which can be rotated about the drilling axis.

In one embodiment, it is advantageous if the untwisting clamping receptacles and / or the twisting clamping receptacles each comprise a fixed and a movable clamping jaw. As a result, only the movable clamping jaw needs to be activated in order to clamp the ends of the individual lines. Conveniently the jaws can have a prismatic, size-adjustable clamping range. A clamping range designed in this way automatically adapts to the different diameter sizes of the individual lines, so that a wide variety of line sizes can be used without adjustment measures.

So that the clamping jaws without additional energy supply, e.g. by hydraulic or air pressure, the clamping function can exert, the fixed and movable jaw can be biased by a spring device in the clamping direction. Accordingly, only a corresponding opening force must be applied to open the jaws.

In a further embodiment, the untwisting and untwisting receptacles each provide a stop for the line ends, so that a positionally accurate insertion can take place.

The untwisting clamping receptacle and the twisting clamping receptacle can preferably have receiving devices for attachments at the line ends offset from the clamping area of the clamping jaws. This means that the attachments are relatively protected during the twisting process and cannot be damaged.

Conveniently, a control device can be provided, which coordinates the rotational speeds of the untwisting clamping receptacles and twisting clamping receptacles and travel speeds of the twisting clamping receptacles and the drill ship according to predetermined values. As a result, individual lines can be produced very efficiently, even with different twisting pitches, with program accuracy.

In a further embodiment, it is proposed to arrange at least two twisting stations with the corresponding components next to one another in one device, as a result of which a tandem arrangement is formed. This means that at least two twisted cables can be produced at once, whereby the linear drives can be used for both twisting stations. In order to take into account the reduction in the length of the individual lines due to the twisting process, the twisting clamping receptacles can be arranged to be movable along the linear guides by means of a feed device. A pneumatic cylinder with back pressure control can allow a procedure due to the tensile effect due to the length shrinkage, the twist clamping recordings while maintaining a desired preload.

An embodiment of the present invention is explained in more detail below with reference to a drawing. Show it:

1 is a schematic front view of the twisting device according to the invention with a cable stand,

2 shows a schematic side view of the device from FIG. 1,

3 shows a schematic view of the twisting head of the device,

4 shows a schematic view of the untwisting tension recordings of the device,

5 shows a schematic illustration of a first method step,

6 shows a schematic illustration of a second method step and

Figure 7 is a schematic representation of a third process step.

The twisting device shown in FIGS. 1 and 2 essentially comprises a machine stand 2 with linear guides 3, and a twisting head 4, an untwisting head 5 and a twisting ship 6 are arranged on the linear guides 3. The twisting head 4 essentially consists of a twisting motor 7 and of this driven twisting clamping receptacles 8. The twisting head 4 is in the basic position via a pneumatic cylinder held. During the twisting process, the twisting head 4 is moved along the linear guides 3 in the direction of the untwisting head 5 (counterpressure adjustable).

In contrast to this, the untwisting head 5, which consists of the bearing receptacle 9 and the untwisting clamping receptacles 10, can be moved along the linear guides 3 by means of a linear drive 11.

The drill ship 6, which is essentially formed by a carriage 12 which can be moved along the linear guide 3 and an upwardly directed mandrel 13, can also be driven by a linear drive 14. The mandrel 13 engages between the individual lines 15 and 16, which are arranged between the twisting clamping receptacles 8 and the untwisting clamping receptacles 10. Furthermore, brush devices for calming the lines 15 and 16 during the twisting process can also be arranged within the device (not shown).

Furthermore, a control device can be provided which coordinates the process sequences on the twisting head 4, the untwisting head 5 and the linear drives 11 and 14.

A stand system 17 can be provided as a single line provider, on which many individual lines 15, 16 are arranged in parallel next to one another. Brushes 18 on the stand system 17 ensure that no more lines are moved down from the stand system 17 by pulling off individual lines 15, 16. The individual lines 15, 16 have been cut to length beforehand and, if necessary, assembled.

As can be seen in FIG. 2, the twisting device 1 shown is a tandem system with a first twisting station 19 and a second twisting station 20.

The twisting head 4 and untwisting head 5 will now be described in more detail below with reference to FIGS. 3 and 4. In the device shown, the twisting head 4 (FIG. 3) comprises a support 19 which can be rotated about a twisting axis A and on which two twisting clamping receptacles 8 are arranged symmetrically to the twisting axis A. The twisting clamping receptacles 8 comprise a fixed clamping jaw 20 with a prismatic clamping insert 21 and a movable clamping jaw 22 with a prismatic clamping insert 23. The clamping inserts 21 and 23 delimit a cuboid clamping opening 24, the size of which can be adjusted by comb-like interlocking of the clamping inserts 21 and 23. The movable jaw 22 is connected to a rotatable opening wheel 24 with engagement teeth 25. In the state shown, the fixed jaw 20 and the movable jaw 22 are pressed together by a spring device for generating the clamping action, so that the opening wheel 24 is used for opening against the action of the spring device.

To move the movable jaw 22, an opening device 26 is provided which comprises a height-adjustable pneumatic unit 27 which acts with its piston 28 on rack sections 29 and 30 which are also movable in height. These rack sections 29 and 30 can be brought into engagement with the engagement teeth 25 of the opening wheels 24, the movable jaws 22 being moved into their open position by moving the piston 28 to the left. Since the clamping effect on the jaws 20 and 22 is achieved by the spring device (not shown), the opening device 26 is only raised accordingly in the case of opening and is brought into engagement with the opening wheels 24.

The arrangement of the twist clamping receptacles 8 on the carrier 19 shows that they also rotate about the twisting axis A without changing their position relative to the carrier 19.

The untwisting head 5 (FIG. 4) comprises two untwisting clamping receptacles 10, each of which can be rotated about axes of rotation arranged parallel to the twisting axis A. Since the construction of the untwisting clamping receptacles 10 and the opening device 26 otherwise corresponds to the construction of the twisting clamping receptacles 8, the same reference numbers can be used and a more detailed description can be given. exercise can be dispensed with. In addition, it should also be pointed out that the untwisting head 5 can be moved along the linear guide 3 with the bearing receptacle 9, it being driven by the linear drive 11. The untwisting clamping receptacles 10 are either driven jointly by a single drive or by an individual drive, or are merely supported. Coupling with the linear drive 11 is also quite possible.

With the aid of FIGS. 5, 6 and 7, the action and function of the exemplary embodiment described above will now be explained in more detail below.

In the top views it can also be seen that the clamping inserts 21 and 23 are shorter than the movable jaw 22 and fixed jaw 20, so that a receiving recess 31 is formed axially offset from the clamping inserts 21, 23, in which extensions 32, e.g. Contact connections, the individual lines 15, 16 are added.

It can be seen from FIG. 5 that two lines 15, 16 have been withdrawn from the stand system 17 and the first ends 33 of which have been inserted with the contact connections 32 into the untwisting receptacles 10. In this case, only one of the lines 15, 16 is inserted into a corresponding untwist take-up 10. For this purpose, the movable jaw 22 must be opened by the opening device 26. The ends 33 are then advanced to an abutment surface of the untwisting fixture 10 so that they are precisely positioned. The movable jaw 22 is then closed by moving the piston 28 and / or directly moving the opening device 26 down. The clamping opening 24 'then automatically adapts to the corresponding diameter of the individual lines 15, 16 and clamps them through the comb-like interlocking of the clamping inserts 21 and 23.

The untwisting head 5 is in this process in the vicinity of the twisting head 4 and, after the individual lines 15, 16 have been clamped, is displaced in the direction B, so that the lines 15, 16 are drawn into the device. The Untwist the head 5 only so far that the other ends 35 of the lines 15, 16 can be inserted without tension into the open jaws 20, 22 of the twisting head 4 and can be pushed up to the stop surface 34.

The opening and closing of the twist clamping receptacles 8 then takes place via the opening device 26 in a manner similar to that of the untwisting head 5 (see FIG. 6).

After the other ends 35 have likewise been introduced individually into the twisting clamping receptacles 8, the untwisting head 5 moves again in the direction B in order to apply the final tension to the lines 15, 16. The lines 15, 16 now extend essentially parallel to one another. The mandrel 13 of the drill ship 6 is either automatically arranged between the lines during this process or correspondingly moves into this position before the start of the actual twisting process.

During the twisting process (see FIG. 7), the twisting head 4 is now rotated about the twisting axis A. As a result, the lines 15, 16 intersect in the region of the mandrel 13 and twist. At the same time, the untwisting fixtures 10 of the untwisting head 5 are rotated individually and parallel to the twisting axis A in the same direction as the twisting head 4, so that no torsional stress can build up in the individual lines 15, 16. The lines 15, 16 therefore only perform a twisting movement, but without executing a torsional movement about their own axis, which could lead to inadmissibly high voltages and damage to the line.

The distance between the twisting head 4 and the untwisting head 5 must decrease during the twisting process, since the length of the twisted cable is always shorter than the individual length of the lines 15, 16. In this device, the twisting head 4 moves in the direction B 'on the untwisting head 5 Twisting process. A corresponding voltage is still held on lines 15, 16. The linear drive 11 can be operated in a force-controlled manner. Furthermore, the rotational speed of the twisting head 4 and the moving speed C of the twisting ship 6 can be coordinated with one another by a control device, so that the twisting pitch can be adjusted. The lines 15, 16 are preferably twisted closer together in the vicinity of the twisting head 4 and untwisting head 5, so that a kind of knot effect occurs which makes the unintentional untwisting even more difficult.

After completion of the twisted cable, the twist clamping receptacles 8 and untwist clamping receptacles 10 are opened again by the opening device 26 and the cable is removed.

Understandably, lines with different line cross sections, for example 0.35 to 2.5 mm ² and different lengths, for example 0.4 to 8 m, can be twisted on such a twisting device 1. It is possible for the cable ends 33 and 35 to have attachments 32, for example in the form of contact connections, housings, etc., which are received in the receiving recesses 31. This is possible because no torsion is exerted on the individual lines 15, 16 during the twisting process. It is important here that the twisting of the individual lines generated by the twisting clamping receptacles 8 is canceled again by the untwisting clamping receptacles 10.

Claims

EXPECTATIONS

1. Method for twisting at least two individual lines with the following steps:

Clamping the one line ends (33) of individual lines (15, 16) cut to a certain length into separate, twist-free untwisting receptacles (10) which can be rotated essentially parallel to a twisting axis (A);

Clamping the other line ends (35) of the individual lines (15, 16) in separate twisting clamping receptacles (8), which are arranged together rotatable about the twisting axis (A);

Arranging a drill ship (6) between the essentially tensioned lines (15, 16); and

Rotating the twist tensioning receptacles (8) together around the twisting axis (A) and rotating the twisting tensioning receptacles (10) in each case around the line axis of the respective individual lines (15, 16).

2. The method according to claim 1, characterized in that the drill ship (6) is arranged in the vicinity of the twist clamping receptacles (8) between the lines (15, 16) and is moved during the twisting process in the direction of the untwisting clamping receptacles (10).

3. The method according to claim 1 or 2, characterized in that the travel speed of the drill ship (6) is controlled in dependence on the speed of the twist clamping receptacles (8) about the twisting axis (A).

4. The method according to any one of claims 1 to 3, characterized in that the twist clamping receptacles (8) are moved in a controlled manner relative to the untwisting clamping receptacles (10) during the twisting process.

5. The method according to any one of claims l to 4, characterized in that the cutting and / or clamping of the individual lines (15, 16) takes place automatically as a further step.

6. The method according to any one of claims 1 to 5, characterized in that the Entdrillspannaufnahmen (10) after clamping the one line ends (33) for pulling the lines (15, 16) into a twisting device relative to the twisting clamping receptacles (8) along the Twist axis (A) are moved a certain length.

7. The method according to claim 6, characterized in that the determined pull-in length is less than the maximum distance from the untwist and twist clamping receptacles (8, 10) at the beginning of the twisting process and that after the other ends (35) have been clamped in the twist clamping receptacles ( 8) the lines (15, 16) are tensioned by repeated relative movement of the untwisting tension receptacles (10).

8. The method according to any one of claims 1 to 7, characterized in that the lines (15, 16) in the area of their line ends (33, 35) are twisted closer than in the rest of the area.

9. Twisting device for twisting at least two individual lines, characterized by at least two untwisting receptacles (10) for clamping

Line ends (33), each separately, essentially parallel lel to a twisting axis (A) are arranged rotatably, at least two twisting clamping receptacles (8) arranged opposite the untwisting clamping receptacles (10) for clamping the other line ends (35), which are arranged rotatably together about the twisting axis (A), and one between the lines (15, 16) positionable drill ship (6), the untwist clamping receptacles (10) and the twisting clamping receptacles (8) being movable relative to one another along the twisting axis (A).

10. Twisting device according to claim 9, characterized in that the untwisting clamping receptacles (10) are arranged on a common untwisting carriage by means of a linear drive (11) along the twisting axis (A).

11. Twisting device according to claim 9 or 10, characterized in that the drill ship (6) on a carriage (12) by means of a linear drive (14) along the twist axis (A) is arranged movable.

12. Twisting device according to one of claims 9 to 11, characterized in that the twisting clamping receptacles (8) are arranged on a common support (19) rotatable about the drilling axis (A).

13. Twisting device according to one of claims 9 to 12, characterized in that the untwisting clamping receptacles (10) and / or the twisting clamping receptacles (8) each comprise a fixed and a movable clamping jaw (20, 22).

14. Twisting device according to one of claims 9 to 13, characterized in that the clamping jaws (20, 22) have a prismatic, size-adjustable clamping range.

15. Twisting device according to one of claims 9 to 14, characterized in that the fixed and movable jaw (20, 22) are biased by a spring device in the clamping direction.

16. Twisting device according to one of claims 9 to 15, characterized in that the Entdrillspannaufnähme (10) and Verdrillspannaufnähme (8) each provide a stop (34) for the line ends (33, 35).

17. Twisting device according to one of claims 9 to 16, characterized in that the EntdriUspannaufnahme (10) and Verdrillspannaufnähme (8) offset to the clamping area of the clamping jaws (20, 22) receiving devices (31) for attachments to the line ends (33, 35 ) having.

18. Twisting device according to one of claims 9 to 17, characterized in that a control device is provided which controls the rotational speeds of the untwisting tension receptacles (10) and twisting tensioning receptacles (8) and relative travel speeds of the twisting tensioning receptacles (8) and the drill ship (6) according to predetermined values coordinated.

19. Twisting device according to one of claims 9 to 18, characterized in that at least two twisting stations with the corresponding components are arranged side by side in one device.

20. Twisting device according to one of claims 9 to 19, characterized in that the twist clamping receptacles (8) by means of a feed device, e.g. a pneumatic cylinder with back pressure control, along which linear guides (3) can be moved.