STRANDING MACHINE

Abstract

A stranding machine is provided for producing a cord from a plurality of wires, preferably metal wires. The stranding machine has a stranding device for stranding the wires, including at least one rotatably mounted deflecting roller for deflecting the cord and at least one guide device for guiding the cord. The guide device is arranged in such a way that the cord can be guided on a straight line from the guide device to the deflecting roller in such a way that the cord is pressed against a first flank of the deflecting roller. As the cord is deflected by the deflecting roller, the cord moves from the first flank into the roller base of the deflecting roller.

Claims

1. A stranding machine for producing a cord from a plurality of wires, comprising: a stranding device for stranding the wires, at least one rotatably supported deflecting roller for deflecting the cord, and at least one guiding device for guiding the cord, wherein the at least one guiding device is arranged in such a way that the cord can be guided on a straight line from the guiding device to the at least one deflecting roller, in such a way that the cord is pressed against a first flank of the at least one deflecting roller.

2. The stranding machine according to claim 1, wherein a pulling device is arranged behind the at least one deflecting roller in a direction of movement of the cord, the pulling device being suitable for exerting a tensile force on the cord running off the at least one deflecting roller.

3. The stranding machine according to claim 2, wherein the pulling device is a winding device.

4. The stranding machine according to claim 1, wherein a contact point of the cord on the at least one guiding device, from which the cord can be guided on a straight line to the at least one deflecting roller in such a way that the cord is pressed against the first flank of the at least one deflecting roller, is offset with respect to a central plane of the at least one deflecting roller.

5. The stranding machine according to claim 1, wherein the at least one guiding device is arranged in such a way that the cord can be guided on a straight line from the at least one guiding device to the at least one deflecting roller in such a way that the cord is pressed against a second flank of the at least one deflecting roller, wherein the second flank is different from the first flank.

6. The stranding machine according to claim 1, wherein the at least one guiding device is moveable relative to the at least one deflecting roller.

7. The stranding machine according to claim 1, wherein the at least one guiding device is a rotatably supported guiding roller.

8. A process for producing a cord from a plurality of wires to be carried out on a stranding machine including a stranding device for stranding the wires, a rotatably supported deflecting roller, and a guiding device, the method comprising: the wires are stranded in the stranding device, the cord is guided from the stranding device to the guiding device, the cord is guided on a straight line from the guiding device to the deflecting roller in such a way that the cord is pressed against a first flank of the deflecting roller, the cord is deflected by the deflecting roller, and the cord is guided away from the deflecting roller.

9. The process for producing a cord according to claim 8, wherein the cord moves from the first flank into a roller base of the deflecting roller during the deflection by the deflecting roller.

10. The process according to claim 8, wherein the cord is produced from a plurality of metallic wires.

11. The stranding machine according to claim 1, wherein the cord is produced from a plurality of metallic wires.

12. The stranding machine according to claim 6, wherein the at least one guiding device is moveable substantially orthogonally to a central plane of the at least one deflecting roller.

13. The stranding machine according to claim 3, wherein a contact point of the cord on the at least one guiding device, from which the cord can be guided on a straight line to the at least one deflecting roller in such a way that the cord is pressed against the first flank of the at least one deflecting roller, is offset with respect to a central plane of the at least one deflecting roller, wherein the at least one guiding device is arranged in such a way that the cord can be guided on a straight line from the at least one guiding device to the at least one deflecting roller in such a way that the cord is pressed against a second flank of the at least one deflecting roller, wherein the second flank is different from the first flank, wherein the at least one guiding device is moveable substantially orthogonally to the central plane of the deflecting roller, and wherein the at least one guiding device is a rotatably supported guiding roller.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0029] The accompanying drawing, which is incorporated in and constitutes a part of this specification, illustrates one or more embodiments of the invention and, together with the general description given above and the detailed description given below, explains the one or more embodiments of the invention.

[0030] FIG. 1 is a perspective view of a section of a stranding machine according to one embodiment of the invention, illustrating the path of the cord.

DETAILED DESCRIPTION

[0031] FIG. 1 illustrates the path of the cord through a stranding machine according to one embodiment of the invention, which, in this exemplary embodiment, is preferably a double twist stranding machine. The stranding machine includes a stranding device in which a rotor rotates, having a flyer bow (not shown). Inside of the rotational volume of the flyer bow, a housing 2 is suspended at a left end and at a right end by two rotor shaft bearing housings on two separate rotor shaft sections (both not shown).

[0032] The cord 1 runs through an opening 3 in the housing 2 to a draw-off disc 4, which is driven and which draws the cord 1 off the stranding device by way of exerting tensile stress. The draw-off disc 4 and a lift-off roller 5 arranged above the draw-off disc 4 and parallel to the latter each comprise a plurality of running grooves, through which the cord 1 is alternatingly guided, so that the cord 1 passes through the draw-off disc 4 and the lift-off roller 5, alternatingly and altogether multiple times. The draw-off disc 4 and the lift-off roller 5 function as a first torsion lock.

[0033] The cord 1 then passes through two deflecting rollers 6 and 7 and is thereby deflected overall by 270 degrees. In this case, the deflecting roller 7 is slightly slanted so that the cord running off from the deflecting roller 7 does not collide with the cord running onto the deflecting roller 6.

[0034] Thereafter, the cord 1 runs along one sidein the exemplary embodiment along the left sideof a rotatable guiding roller 8, the axis of which extends approximately vertically. The guiding roller 8 has the effect that the cord 1 is deflected slightly out of its path and does not run centrally onto the following deflecting roller 9, but is pressed against a flank of the deflecting roller 9, in the exemplary embodiment against the left flank 9a as seen in the running direction of the cord 1. The position of the guiding roller 8 relative to the deflecting roller 9 can be fine-tuned by a vernier 12. With the aid of the vernier 12, the axis of the guiding roller 8 can be moved back and forth substantially orthogonally to the center plane of the deflecting roller 9.

[0035] The cord 1 wraps around the deflecting roller 9 by slightly less than 180 degrees. On its path from the point of entry onto the deflecting roller 9 on the left flank 9a to the point of exit, the cord 1 moves from the flank 9a into the roller base 9b. In doing so, the cord 1 moves in conjunction with the twisting torsion, as a result of which the above-described tendency of the cord to curl is reduced.

[0036] The stranding machine also comprises a traverse mechanism 16 having further deflecting rollers 10 and 11, which can be moved along a traverse axis on a spindle (not shown). The spindle is supported in two bearings 13, 14 (shown in a sectional cut in FIG. 1) and is driven by a drive wheel 15 (also shown as a sectional cut). The spindle runs parallel to the bobbin axis of the winding bobbin of a winding device (also not shown).

[0037] The cord 1 runs off from the deflecting roller 9 parallel to the spindle of the traverse mechanism 16 and thus runs onto the deflecting roller 10 of the traverse mechanism 16 always at the same angle, irrespective of the displacement position of the traverse mechanism 16. By the deflecting rollers 10 and 11, the cord 1 is again deflected in order to finally be guided to a winding device and to be wound onto a winding bobbin (both not shown) at the axial position of the winding bobbin predetermined by the displacement position of the traverse mechanism 16.

[0038] Therein, the driven winding bobbin exerts a tensile force onto the cord 1, as a result of which the cord 1 is pressed against the deflecting roller 9, preferably with a high pressing force, and is thus slightly stretch formed between the deflecting roller 9 and the winding bobbin, typically by 2% to 3%. In this way, the helical structure which is imposed on the cord due to the twisting is further minimized or even completely removed. Insofar, the deflecting roller 9 functions as a (second) torsion barrier.

[0039] The embodiments described above are only descriptions of preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Various variations and modifications can be made to the technical solution of the present invention by those of ordinary skill in the art without departing from the design and spirit of the present invention. The variations and modifications should all fall within the claimed scope defined by the claims of the present invention.