DD246579A1 - TURNING DEVICE FOR STEEL WIRE LATHES - Google Patents

Abstract

The invention relates to a wrapping device for steel wire strands, wherein the strand is withdrawn from a quiescent return coil and fed via a controlled stretching device of a take-up reel. The aim of the invention is the production of steel wire strands with high quality codes, such. B. twist, to secure by means of minimal mechanical engineering effort and minimal space requirements. The object of producing a device for wrapping steel wire strand is achieved by arranging a torsion measuring device between a known stretching device and the rewinder, which establishes a connection to the stretching device via an evaluation and control device and thus enables regulation of the stretching force F.

Description

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Field of application of the invention

The invention relates to a device for wrapping steel wire strands, wherein the strand is withdrawn from a quiescent bobbin and fed via a controlled stretching device of a take-up reel.

Characteristic of the known technical solutions

From the literature, methods and apparatus for stretching steel cables, metal wires u. a. known.

From DE-OS 2849150 a method and a device for the early loading of wire ropes, in particular shaft hoisting ropes of mining, known. Here, a predetermined length of rope is clamped and subjected to one or more times an axial tensile stress. The wire rope undergoes an elastic deformation, which leads on the one hand to a permanent elongation and on the other hand to a change in the expansion behavior due to increase in the modulus of elasticity.

The disadvantage here is that the stretching force acts on a relatively large length of the material to be stretched and thus can occur in material inhomogeneities cracks within the strand. Furthermore, it should be noted that a continuous control of the tensile stress in dependence on the voltages contained in the strand is not possible.

The DD-PS 212543 discloses a method and an apparatus for stretching wire ropes, wherein the wire rope two times so-called friction winds wraps around and between them, wherein a friction winch is slidably disposed, is stretched.

Another disadvantage is the relatively large length of the wire rope on which the stretching force acts and it is also no regulation of the tensile stress in dependence on the voltages contained in the strand possible.

DD-PS 66156 describes a method and a device for the length of metal wires or the like, wherein the metal wire by a number of specially executed, rotating at equal angular velocity slices.

is led around. Here o.g. Disadvantages are mentioned.

Object of the invention

The aim of the invention is the production of steel wire strands with high quality codes, such. B. twist-free, to secure by means of minimal mechanical engineering effort and minimal space requirements.

Explanation of the essence of the invention

The invention has for its object to develop a device for wrapping produced on double twist stranding machines without reverse rotation of the individual wires or without over-rotation of the Gesamtverbandes steel wire strands, the existing after the Doppelschlagverseilung in the strand elastic torsional stresses are eliminated in a separate process by a known stretching device and the stretching force is regulated as a function of the measured torsion.

According to the invention, the object is achieved in that the wrapping device for steel wire strands consists of a coil with supply spool and brake system, a stretching device and a winder with winding spool, wherein between stretching device and winder Torsionsmeßeinrichtung consisting of a rotatably and pivotally mounted roller, which a holder with Assigned wave is arranged. Furthermore, the Torsionsmeßeinrichtung is connected via an evaluation and control device by means of known fasteners mit'der stretching device.

The steel wire strand produced on the double twist stranding machine is drawn tangentially from the supply reel with constant tension and fed to a known stretching device, by means of which the stranding the stretching force is applied to eliminate the elastic torsional stresses.

Subsequently, the strand, fed by a deflection roller, is fed to a torsion measuring device for measuring elastic torsional stresses still present in the strand. The strand runs through a rotatably and pivotally mounted, arranged within the Torsionsmeßeinrichtung role. Finally, the strand again runs over a pulley to a rewinder.

The steel wire strand is withdrawn with constant tension from a supply spool, by a known stretching device to a torsion meßein direction and then passed to a winder.

In detail, this process is carried out in such a way that the strand is applied within the stretching device by a force introduction roller, a stretching force. The reaction forces occurring by the stretching in the strand are degraded according to the mechanical law of rope friction Si = S2 β ^μα on the strand drums of the stretching device, which are repeatedly looped around by the strand. The force F for stretching the strand is electro-mechanical, pneumatic or hydraulic

applied to the force introduction roller. Thereafter, the strand is fed via a deflection roller to the torsion measuring device. Are still elastic torsional stresses contained in the strand, the role of the Torsionsmeßeinrichtung is pivoted according to the respective direction of impact of the strand either to the left or to the right. This pivotal movement is fed via correspondingly known devices to an evaluation and control device, wherein the angle measured in each case represents a measure of the magnitude of the elastic torsional stresses still present in the strand. Due to the direct connection of the Torsionsmeßeinrichtung via evaluation and control devices for stretching device, the size of the stretching force, which is applied to the strand via the force introduction roller regulated according to the existing torsional stress in the strand. , ,

Embodiment ·

The invention will be explained in more detail with reference to an embodiment

 The figure shows a representation of the entire wrapping.

The wrapping device for steel wire strands consists, as shown, of the coil 1 with the supply spool 2, from which the steel wire strand 3 with almost constant strand tension, realized by the brake system 4, is subtracted tangentially. The steel wire strand 3 is then fed to a stretching device 8 consisting of two strand drums 5 and 6 and a force introduction roller 7.

After the steel wire strand 3 has passed through the stranded reels 5 and 6, which are looped around several times, and the stretching force F has been applied by the force introduction roller 7, the steel wire strand 3 is connected via a deflection roller 9 to a torsion measuring device 10 consisting of a rotatably and pivotably mounted roller 11 arranged within a Holder 12 with shaft 13, guided. Following this, the steel wire strand 3 passes over a further deflection roller 14 to the winder 15 with its winding spool 16. Are after the passage of the steel wire strand 3 by the stretching device 8 still elastic torsional stresses within the steel wire strand 3 present, the roller 11 corresponding to the respective direction of impact of the steel wire strand 3 pivoted either to the left or to the right about the axis 17. This movement is transmitted via the holder 12 and the shaft 13 to the Torsionsmeßeinrichtung 10. This pivotal movement is supplied via corresponding known devices of an evaluation and control device 18, wherein the respective measured angle is a measure of the size of the remaining elastic in the steel wire strand 3 torsional stresses. Due to the direct connection of the Torsionsmeßeinrichtung 10 via evaluation and control device 18 to the stretching device 8, the size of the stretching force F, which is applied via the KrafteinleitungsroiI 7 on the steel wire strand 3, according to the existing torsional stresses in the steel wire strand 3, regulated. The force F for stretching the steel wire strand 3 is applied to the force introduction roller 7 electro-mechanically, pneumatically or hydraulically. .

The advantages of the invention are as follows:

Since the stretching device 8 is arranged outside of the double-twisting machine, the double-twisting machine is structurally simpler. Within the double twist stranding machine, no regulation of the stretching device 8 during the stranding process would be possible, but only a fixed adjustment of the stretching force F could be realized due to the limited space available. By arranging a Torsionsmeßeinrichtung 10 within the wrapping a control is possible with higher accuracy in dependence on the torsional stresses contained in the steel wire strand 3. Furthermore, it is possible to use correspondingly larger supply reels, so that a production with longer running times and correspondingly shorter setting and operating times is realized.

Claims (2)

Claim of invention: 1. Umwickeleinrichtung for steel wire strands, consisting of coil sequence with supply reel and brake system, stretching device and rewinder with winding reel, characterized in that between stretching device (8) and rewinder (15) a Torsionsmeßeinrichtung (10) consisting of a via a holder (12) Shaft (13) rotatably and pivotally mounted roller (11) is arranged. 2. Umwickeleinrichtung for steel wire strands to Hauptpunkt!, Characterized da.daß dasTorsionsmeßeinrichtung (10) via an evaluation and control device (18) by means of known connecting elements with the stretching device (8) is connected.