DD285803A5 - DRAHTFUEHRUNGSARME - Google Patents

Abstract

The invention relates to one-sided and kreisbogenfoermig formed mass loaded Drahtfuehrungsarme and preferably finds application at the stranding of double twist stranding machines. The task, o. G. To develop wire guide arms was achieved by making each unidirectional and arcuate mass loaded wire guide arm on the stranding rotor of double twist stranding machines a ratio of circular arc radius r to height a of 6: 1 to 8: 1 and a ratio of height a to width b of 1: 3, 5 to 1: 4.5. Furthermore, each Drahtfuehrungsarm is executed as a box profile and in the direction of rotation with convex surfaces gewoelbten. Fig. 2 {one-sided; kreisbogenfoermig; mass loaded; wire guide arm; stranding; Doppelschlagverseilmaschine; Box section; convexly curved surfaces}

Description

For this 3 pages drawings

Field of application of the invention

The invention relates to one-sided and circular arc-shaped mass-loaded wire guide arms and preferably finds application on Verseilrotor double twist stranding machines.

Characteristic of the known state of the art

The Doppelschlagverseilverfahren as a relatively young process for steel cord production is becoming established more and more, also for reasons of better mechanical design of the individual functional elements.

There are, in order to achieve high performance in a variety of sizes and styles, extreme demands placed on the stranding. In particular, this applies to those wire guide elements, which, realizing the dual impact principle, must guide the bandage around the drum frame designed as a withdrawal and winding unit.

There are known solutions that realize this in machines with low speed and low withdrawal forces.

One is the use of a closed funnel. By DE-OS 3215130 such funnels have become known whose nipples or rollers on the outer edge lead the wire, but which are complicated to manufacture and affect the accessibility to the drum frame significantly. Other solutions are known in the form of disc-shaped wire guide elements, but do not realize an adaptation to the ideal flight curve, they can still carry out unnecessarily by the large distance between the breakpoints and thus have a negative effect on the space and balance of power.

Obviously, this solution with its disadvantages from DE-OS 2742 612, whereby large moments of inertia are to be overcome for braking.

Even with the help of complete ironing or similar elements is trying to perform the dressing with the least possible effort and relatively quiet. This is counteracted by the fact that the number of wearing elements, e.g. Nipple, increased and the noise behavior is worsened by the additional resistance. Due to its complicated production of the temple over other variants is costly. Furthermore, a complete bracket represents a significant restriction on the freedom of movement in the loading space, not to mention the durability of wire tears, the released forces can be considerable with appropriate program. Furthermore, when using a strap threading the wire is associated with considerable difficulties.

Reference is made in this context to DE-OS 3226572 and DE-OS 1665911.

By DE-AS 1474215 and DE-OS 22 21925 guide arms are further presented in a flyer assembly for winding cables, the execution gives little attention to the CW value and thus power losses are associated with high speeds.

From DE-OS 22 61 028 a wing of open type is described, which is designed symmetrically to the axis of rotation. The disadvantage here is that the wing has relatively large areas in the direction of rotation, so that unfavorable air resistance values and thus unfavorable noise and performance occur.

Object of the invention

The aim of the invention is to produce steel cord or other steel wire strands with minimal mechanical engineering effort and minimal space requirements of the equipment in high quality, with the issue of working and living conditions of the operator of the double twist stranding machines, especially the problem of noise behavior of the system, is particularly important.

Explanation of the essence of the invention

The invention has for its object to develop one-sided and circular arc-shaped mass-loaded wire guide arms, wherein the two opposite wire guide arms within the stranding of the double twist stranding machine are as close as possible to each other in order to minimize the remaining free flight curve of Verseilgutes and should have low air resistance values.

According to the invention, the object is achieved in that each unilaterally and circular arc-shaped mass-loaded Drahtführungsarm the Verseilrotor of Doppelschlagversilmaschinen a ratio of circular arc radius rzu height a from 6: 1 to 8: 1 and a ratio of height a to width b of 1: 3.5 to 1: 4.5.

Furthermore, according to the invention, that each wire guide arm is designed as a box profile and in the direction of rotation with convex curved surfaces.

The following describes the function of the invention:

The stranded material, coming from the center of the hub of the stranding rotor, is guided over a wire guide arm with deflection roller and drum frame of the stranding rotor to the opposite wire guide arm with deflection roller and from there back to the rotor axis.

The wire guide arms are designed so that they largely conform to the ideal flight curve of Verseilgutes and thus give the guided Verseilgut the opportunity to approach in conjunction with deaHaltekräften also that ideal flight curve.

Each Drahtführungsarm each consists of a one-sided and circular arc-shaped mass-loaded arm, which is designed as a box profile, wherein the ratio of arc radius rzu height a each Drahtführungsarmes 6: 1 to 8: 1 and the ratio of height a to the width b of each Drahtführungsarmes 1: 3 , 5 to 1: 4.5. In the direction of rotation, each wire guide arm is designed with convexly curved surfaces in order to obtain a fluidically favorable shape.

embodiment

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

Fig. 1: Representation of the stranding rotor of a double-hemming machine

FIG. 2: detail Z according to FIG. 1

Fig. 3: section A-A of Figure 2

4: Section B-B of Figure 2.

1, the stranded material 1, coming from the center of the hub 2 of the stranding rotor 3, passes over a wire guide arm 4 with deflection roller 5 and the drum frame 6 of the stranding rotor 3 to the opposite wire guide arm 7 with deflection roller 8 and from there back to the rotor axis 9 guided. Gem. Fig. 2,3 and 4, the wire guide arms 4 and 7 are designed so that they largely conform to the ideal flight curve of Verseilgutes 1 and thus give the managed Verseilgut 1 the opportunity to approach in conjunction with the holding forces also that ideal flight curve , Each Drahtführungsarm 4 and 7 each consists of a one-sided and circular arc-shaped and mass-loaded arm, which is designed as a box profile, wherein the ratio of arc radius r to height a of each Drahtführungsarmes 4 and 7 6: 1 to 8: 1 and the ratio of height a to Width b of each wire guide arm 4 and 7 is 1: 3.5 to 1: 4.5. In the direction of rotation, each Drahtführungsarm 4 and 7 is designed with convex surfaces 10 to obtain a fluidically favorable shape. In addition to the counterweight 11, a second balancing plane was integrated by a retaining plate 12 in the stable design for each Drahtführungsarm 4 and 7. For further strengthening of the wire guide arms 4 and 7 are respectively holding plates 13 with the hub 2, with the holding plate 12 and the circular arc-shaped running wire guides 4 and 7 firmly connected in the foot.

The advantages of the invention are that a Drahtführungsarm 4 and 7 has been developed, which has very low masses and consequently low demands on applied drive and braking forces that by the dense approach to each other of the two pulleys 5 and 8 of the wire guide arms. 4 and 7 the remaining free flight curve of the Verseilgutes was reduced, thereby minimizing the forces in Verseilgut 1 is achieved and a low noise level of the system has been realized.

Claims (2)

claims: 1. wire guide arms on Verseilrotor of Doppelschlagverilmaschine ^ which are circular arc designed on one side and mass loaded, characterized in that the ratio of circular arc radius r to height a each Drahtführungsarmes (A, 7) 6: 1 to 8: 1 and the ratio of height a to width b of each wire guide arm (4, 7) is 1: 3.5 to 1: 4.5. 2. wire guide arms according to claim 1, characterized in that each wire guide arm (4,7) is designed as a box profile and in the direction of rotation with convex surfaces (10).