STRANDING MACHINE

Abstract

In a first embodiment, the invention relates to a stranding machine for wires having two wrap-around rollers having wrap-around tracks arranged on the circumference thereof, whereby the wire can be guided in such a way that the wire runs through the first and second wrap-around tracks preferably in alternation in preferably 8-shaped or 0-shaped wraps. In a second embodiment, the stranding machine has a winding device for winding the wire onto a reel having a laying device that can be moved along a movement axis parallel to the reel axis and having a plurality of rotatably supported deflecting rollers, whereby the wire can be guided in such a way that the wire runs onto and/or from each of the deflecting rollers substantially in the plane of rotation of the deflecting roller. In this way, the produced wire has lower twist and lower torsional stresses, which makes the further processing of the wire, in particular the winding, assembly, crimping, and extrusion of a plastic insulation around the wire easier and which increases the number of possible bending reversal cycles.

Claims

1. A stranding machine for producing a stranded wire from a plurality of preferably metal wires which comprises a stranding apparatus for stranding the wires, wherein a first rotatably supported wrap-around roller having one or more first circumferential wrap-around tracks arranged on its circumference and a second rotatably supported wrap-around roller (4) having one or more second circumferential wrap-around tracks arranged on its circumference, wherein the first and second wrap-around rollers are provided for the stranded wire to in each case at least partially wind around along the first wrap-around track or along the second wrap-around track respectively, wherein neither in a projection along the axis of the first wrap-around roller nor in a projection along the axis of the second wrap-around roller does one of the first wrap-around tracks cross one of the second wrap-around tracks and wherein the stranded wire can be guided so as to run in each case at least partly through each first and each second wrap-around track.

2. The stranding machine according to claim 1, wherein exactly one first and exactly one second wrap-around track is provided.

3. The stranding machine according to claim 1, wherein all of the first and second wrap-around tracks are arranged in planes substantially parallel to one another.

4. The stranding machine according to claim 3, wherein the parallel planes in which the first and the second wrap-around tracks are arranged are alternatingly disposed one after another in a direction perpendicular to said planes.

5. The stranding machine according to claim 1, wherein the first or the second wrap-around roller is concurrently a draw-off disk for drawing the stranded wire off from the stranding apparatus.

6. A stranding machine for producing a stranded wire from a plurality of preferably metal wires which comprises a stranding apparatus for stranding the wires and a winding apparatus for winding the stranded wire onto a spool, wherein the winding apparatus comprises a laying device able to move along a movement axis parallel to the spool axis and a plurality of rotatably supported deflecting rollers which are provided for the stranded wire to at least partly wind around in each case, wherein the stranded wire can be guided in such a way that at all times during the winding process it runs onto each of the deflecting rollers substantially in the plane of rotation of the deflecting roller and/or runs off each of the deflecting rollers substantially in the plane of rotation of the deflecting roller.

7. The stranding machine according to claim 6, wherein the stranded wire can be guided within the winding apparatus so as to run parallel to the spool axis when running onto the laying device.

8. The stranding machine according to claim 6, wherein at least one of the deflecting rollers is mounted such that its axis is pivotable.

9. The stranding machine according to claim 8, wherein the pivoting of the axis of the at least one deflecting roller can be controlled as a function of the movement position of the laying device along the movement axis.

10. The stranding machine according to claim 1, characterized by a cross section modifying device, in particular a drawing die, through which the stranded wire can be guided.

11. The stranding machine according to claim 1, wherein the stranding apparatus comprises an elongated rotor bow which is designed such that the wires to be stranded or the stranded wire can slide along a contact surface on a longitudinal side of said rotor bow, wherein said contact surface is provided with a diamond-like carbon material.

12. The stranding machine according to claim 1, characterized by a winding apparatus for winding the stranded wire onto a spool, wherein the winding force of the winding apparatus can be controlled or regulated.

13. A method for producing a stranded wire from a plurality of preferably metal wires to be executed in a stranding machine according to claim 1, wherein the wires are stranded in the stranding apparatus and the stranded wire runs in each case at least partly through each first and each second wrap-around track.

14. The method according to claim 13, wherein the stranded wire runs in each case at least partly through the first and second wrap-around tracks in alternating manner.

15. The method according to claim 13, wherein the stranded wire forms at least one 8-shaped or 0-shaped wrap of the first and the second wrap-around roller when running through the first and second wrap-around tracks.

16. A method for producing a stranded wire from a plurality of preferably metal wires to be executed in a stranding machine according to claim 6, wherein the wires are stranded in the stranding apparatus and the stranded wire is guided such that it runs onto each of the deflecting rollers of the winding apparatus substantially in the plane of rotation of the deflecting roller and/or runs off each of these deflecting rollers substantially in the plane of rotation of the deflecting roller at all times during the winding process.

17. The method according to claim 16, wherein the stranded wire runs parallel to the spool axis when running onto the laying device.

18. The method according to claim 16, wherein the axis of at least one of the deflecting rollers is pivoted as a function of the movement position of the laying device along the movement axis.

Description

[0063] Further advantageous embodiments of the invention are depicted in the accompanying partly schematic drawings in conjunction with the following description. Thereby shown are:

[0064] FIG. 1 a perspective depiction of a detail of a stranding machine according to the invention showing the movement of the stranded wire;

[0065] FIG. 2 the automatic angle-aligning connection of two deflecting rollers via a linkage;

[0066] FIG. 3 depictions of an 8-shaped and an 0-shaped wrap of the first and the second wrap-around roller by the stranded wire.

[0067] The inventive stranding machine (1) depicted in FIG. 1 is a double-twist stranding machine having a stranding apparatus in which a rotor with a rotor bow (not depicted) rotates. A housing 14 is suspended at its left and at its right end within the rotative volume of the rotor bow at two separate rotor shaft sections (not depicted) by means of two rotor shaft bearing housings 7.

[0068] A first wrap-around roller 3, which is at the same time a draw-off disk, a second wrap-around roller 4 as well as a spool (not depicted) and a winding apparatus 8 for winding the stranded wire onto the spool is mounted on the housing 14.

[0069] In FIG. 1, the first wrap-around roller 3 and the second wrap-around roller 4 are arranged vertically one atop the other and with parallel axes to one another. Five circumferential parallel first wrap-around tracks 5.sub.1 . . . , 5.sub.5 are arranged on the circumference of the first wrap-around roller 3. Four circumferential parallel second wrap-around tracks 6.sub.1 . . . , 6.sub.4 are arranged on the circumference of the second wrap-around roller 4. Of course, however, other numbers of first and second wrap-around tracks can also be selected. The first and second wrap-around tracks 5.sub.1 . . . , 5.sub.5, 6.sub.1 . . . , 6.sub.4 are arranged one behind the other in the axial direction of the wrap-around rollers 3, 4 and namely in the orderseen from the rearof 5.sub.1, 6.sub.1, 5.sub.2, 6.sub.2, 5.sub.3, 6.sub.3, 5.sub.4, 6.sub.4, 5.sub.5. The wrap-around tracks are preferably in the form of wedge-shaped grooves respectively limited on both sides by a flange.

[0070] The movement of the stranded wire 2, indicated by the arrow, can be seen as of the position at which, coming from a stranding point at the rotor, it exits the rotor shaft bearing housing 7 along the rotor axis. The right rotor shaft section is designed as a hollow shaft to enable the stranded wire to be fed through. The rotor axis and thus the exiting direction of the stranded wire are at the height of the rear first wrap-around track 5.sub.1 in the axial direction of the wrap-around rollers 3, 4 and at the lower edge of said first wrap-around track 5.sub.1 in the vertical direction.

[0071] The stranded wire 2 runs horizontally and tangentially onto the first wrap-around track 5.sub.1 and continues thereon in the clockwise direction until exiting the first wrap-around track 5.sub.1 on the left side and tangentially entering the second wrap-around track 6.sub.1 on the right side in a diagonal straight line.

[0072] From there, the stranded wire 2 further runs counterclockwise onto the second wrap-around track 6.sub.1 until exiting the second wrap-around track 6.sub.1 on the left side and tangentially entering the first wrap-around track 5.sub.2 on the right side in a diagonal straight line.

[0073] In this way, the stranded wire 2 runs through all the first and second wrap-around tracks 5.sub.1 . . . , 5.sub.5, 6.sub.1 . . . , 6.sub.4 in the above-cited order from rear to front in 8-shaped wraps of the first and second wrap-around rollers 3, 4.

[0074] Seen from the front, the first wrap-around roller 3 rotates clockwise during the operation of the stranding machine 1, the second wrap-around roller 4 counter-clockwise.

[0075] Lastly, the stranded wire 2 tangentially runs horizontally off from the furthest forward first wrap-around track 5.sub.5 and on to a winding apparatus 8 having a plurality of deflecting rollers 9, 10 where it is wound onto a spool (nor depicted).

[0076] The repeated bending when running through the first and second wrap-around tracks 5.sub.1 . . . , 5.sub.5, 6.sub.1 . . . , 6.sub.4 reduces the twist and the torsional stresses in the stranded wire 2.

[0077] Functionally independent of the first and the second wrap-around roller 3, 4, the inventive stranding machine 1 according to FIG. 1 comprises a winding apparatus 8 having a laying device 15.

[0078] The winding apparatus 8 comprises a first deflecting roller 9, a second deflecting roller 10, a third deflecting roller 11, a fourth deflecting roller 12 and a fifth deflecting roller 13, all of which are rotatably supported. The first deflecting roller 9, the second deflecting roller 10 and the third deflecting roller 11 are mounted on the housing 14, the fourth deflecting roller 12 and the fifth deflecting roller 13 on the laying device 15.

[0079] The winding apparatus 8 serves to wind the stranded wire 2 running off of the first wrap-around roller 3 (or, respectively, in an embodiment of the stranding machine 1 without first and second wrap-around rollers 3, 4, exiting the rotor shaft bearing housing 7) onto a (not depicted) spool.

[0080] The laying device 15 can be moved by means of a spindle drive, with a spindle (not depicted) running through a spindle support 17 in the laying device 15, along a movement axis parallel to the spool axis over such a distance that the fifth deflecting roller 13, also called the laying roller, can situate over any point along the longitudinal extension of the winding core. The spool axis and thus the movement axis of the laying device 15 are in this embodiment of the stranding machine 1 arranged at right angles to the rotor axis.

[0081] During the winding process, the laying device 15 runs back and forth between the two ends of the winding core and thus causes the stranded wire 2 to be wound in windings onto the spool rotating about the spool axis.

[0082] Upon reaching an end of the winding core, the laying device 15 changes its direction of movement. Thus, with each movement sequence of the laying device 15 from one end of the winding core to the other, a further layer of windings of the stranded wire 2 is formed on the spool.

[0083] The stranded wire 2 is thereby guided in the laying device 15 starting from the run-off point of the stranded wire 2 from the first wrap-around roller 3 (respectively the exit point of the stranded wire 2 from the rotor shaft bearing housing 7) as follows:

[0084] First, the stranded wire 2 runs around the first deflecting roller 9 at an angle of 90 degrees as well as around the second deflecting roller 10 at an angle of 180 degrees such that it is deflected a total of 270 degrees. While the axis of the first deflecting roller 9 is perpendicular to the surface of the housing 14, the axis of the second deflecting roller 10 is slightly tilted to same such that the stranded wire 2 is slightly deflected upward when running around the second deflecting roller 10 and does not make contact with the stranded wire 2 running onto the first deflecting roller 9 upon crossing same ((illustrated in the perspective FIG. 1 representation as the crossover point of the stranded wire 2 with itself)).

[0085] Instead of two deflecting rollers 9, 10, which deflect the stranded wire 2 a total of 270 degrees, one single deflecting roller deflecting the stranded wire 2 by 90 degrees could also be used. However, this single deflecting roller would have to have been arranged to the right behind the cited crossover point of the stranded wire with itself in FIG. 1 and would collide there with the first wrap-around roller 3. If, on the other hand, this single wrap-around roller were to be arranged further to the left in FIG. 1 in order to prevent the cited collision, the entire winding apparatus 8 would also have to be moved further to the left. This arrangement is likewise conceivable but it would, however, lead to a less compact arrangement in the limited available space within the rotative volume of the rotor bow.

[0086] After the described 270 degree deflection, the stranded wire runs parallel to the spool axis and thus also to the axis of movement of the laying device 15.

[0087] The stranded wire 2 is then deflected upward 90 degrees by the third deflecting roller 11 which is rotatably supported on a bearing block 24 fixedly connected to the housing 14. The end of the axis of the third deflecting roller 11 opposite the bearing block 24 at the same time serves as a pivot bearing for the lower end of a linkage 16. The linkage 16 points upward and is displaceably attached at its upper end to the laying device 15 by running through a through-hole in a linear guide block 18 designed as a linear guide, in particular a slide bearing. The lower end of the linkage 16 is slanted to the right at an angle of approximately 15 degrees from the vertical (cf. FIG. 2a).

[0088] From the third deflecting roller 11, the stranded wire 2 runs virtually parallel to linkage 16 to the fourth deflecting roller 12 where it is deflected to the left by 90 degrees.

[0089] The linear guide block 18 is connected to the axis 19 of the fourth deflecting roller 12 in the laying device 15. The fourth deflecting roller 12 is rotatably supported about its axis 19 on a suspension 23. The suspension 23 is in turn rotatably supported on a housing section 25 of the laying device 15, wherein the rotational axis of the suspension 23 runs tangentially to the upper edge of the fourth deflecting roller 12 and corresponds to the intended direction at which the stand 2 runs off from the fourth deflecting roller 12 to the fifth deflecting roller 13. Thus, rotation of the suspension 23 allows the axis 19 of fourth deflecting roller 12 to pivot about the rotational axis of the suspension 23.

[0090] When the laying device 15 moves along the movement axis, the linkage 16 rotatably supported at its lower end relative to the housing 14 is pivoted and titled into a plane running parallel to the movement axis. The upper end of the linkage 16 thereby moves into the through-hole of the linear guide block 18, whereby the distance between the third deflecting roller 11 and the fourth deflecting roller 12 changes, although not the angle between the rotational planes of these two deflecting rollers. The linear guide block 18 and thus the rotational plane of the fourth deflecting roller 12 always have the same inclination relative to the cited plane running parallel to the movement axis during the movement of the laying device 15 as the linkage 16.

[0091] Details of the connection of the third deflecting roller 11 to the axis 19 of the fourth deflecting roller 12 by means of the linkage 16 are depicted in FIG. 2. A spacer 20 which passes through a drilled hole in the linear guide block 18 is slid onto axis 19. The distance needed between the linear guide block 18 or the linkage 16 respectively and the fourth deflecting roller 12 for guiding the stranded wire 2 is set by a further spacer 21. The fourth deflecting roller 12 is distanced from the suspension 23 to which the axis 19 is attached by a washer 22.

[0092] As again depicted in FIG. 1, the stranded wire 2 runs from the fourth deflecting roller 12 to the fifth deflecting roller 13 parallel to the rotor axis without further deflection. From there, it is deflected downward at an angle subject to the respective amount of spool content and runs onto the winding already having accumulated on the spool. The axis of the fifth deflecting roller 13 thereby runs parallel to the spool axis and to the movement axis of the laying device 15.

[0093] By virtue of the described construction and kinetics of the winding apparatus 8 and the corresponding stranded wire guidance, the stranded wire 2 runs onto each of the five deflecting rollers 9 to 13 in the rotational plane of the respective deflecting roller at all times during the winding process and also runs off them again in the rotational plane of the respective deflecting roller. This thereby results from the rotational planes of respectively two successive deflecting rollers along the movement of the stranded wire 2 crossing at those straight stretches where the stranded wire 2 runs between the two deflecting rollers.

[0094] Under that condition, it is also possible for the axis of one given deflecting roller to be tilted relative to the axis of the preceding deflecting roller along the movement of the stranded wire 2, as is also the case in the example embodiment according to FIG. 1 between two successive deflecting rollers.

[0095] In this way, the stranded wire 2 does not undergo any lateral rotational motion when running onto or off of a particular deflecting roller 9 to 13 which could adversely impact the twist or the torsional stresses in the stranded wire 2.

[0096] The winding apparatus 8 is automatically angle-aligning in the sense of the angle of inclination to axis 19 and thus also the rotational plane of the fourth deflecting roller 12 always being property aligned as a function of the movement position of the laying device 15 at the respective moment.

[0097] Of course, the stranding machine 1 can also be of mirror-inverted design compared to the above described embodiment; i.e. mirrored at a vertical central plane of the rotor perpendicularly along the rotor axis. The stranded wire 2 then exits the rotor shaft bearing housing at the left end and runs from there to the right. The further movement of the stranded wire 2 and the associated components of the stranding machine 1 are then also mirrored reflected relative to the above-described arrangement.

[0098] FIG. 3a) shows a schematic view of an 8-shaped wrap and FIG. 3b) a schematic view of an 0-shaped wrap of the first and second wrap-around roller 3, 4 in an axial projection of the wrap-around rollers 3, 4, whereby the direction of motion of the stranded wire 2 is indicated by arrows.

LIST OF REFERENCE NUMERALS

[0099] 1 stranding machine

[0100] 2 stranded wire

[0101] 3 first wrap-around roller/draw-off disk

[0102] 4 second wrap-around roller

[0103] 5.sub.1, . . . , 5.sub.5 first wrap-around tracks

[0104] 6.sub.1, . . . , 6.sub.4 second wrap-around tracks

[0105] 7 rotor shaft bearing housing

[0106] 8 winding apparatus

[0107] 9 first deflecting roller

[0108] 10 second deflecting roller

[0109] 11 third deflecting roller

[0110] 12 fourth deflecting roller

[0111] 13 fifth deflecting roller

[0112] 14 housing

[0113] 15 laying device

[0114] 16 linkage

[0115] 17 spindle support

[0116] 18 linear guide block

[0117] 19 fourth deflecting roller axis

[0118] 20 spacer

[0119] 21 spacer

[0120] 22 washer

[0121] 23 fourth deflecting roller suspension

[0122] 24 third deflecting roller bearing block

[0123] 25 laying device housing section