DE2052022B2 - Process for the production of a closed shaped wire layer for wire ropes, cables and similar products - Google Patents

Description

The present invention relates to a method for producing a closed forming wire layer for Wire ropes, cables and similar products in which several shaped wires are wrapped around a core and then plastically deformed on this by pressing and for full contact with each other and with the Core to be brought. Such methods are known from US Pat. No. 19 43 087 or 21 22 911

In these known methods, shaped wires are used, although, as mentioned, after their Deformation come together to form a full abutment, but none of them arise in the same way fully closed form wire layers that the individual wire on its movement out of the association in radial or approximately radial direction would be prevented. This is disadvantageous in that it breaks of a wire of the outer shaped wire layer, this wire is removed from the association from the break point can unwind.

The production of a rope is known from US-PS 31 88 791, in which the outer wire layer is made of Form wires are laid, which then form a positive fit in the finished rope, which is obtained without plastic deformation interlock that a detachment of a single wire in radial or approximate radial direction is no longer possible. The cross-sectional shapes of the shaped wires used here are JE shapes or X shapes alternating with O shapes. While with such wires a good one Cohesion and a full closure of the outer

Wire layer can be achieved, it is disadvantageous here that a large one for the production of the shaped wires Effort is required. When pulling or rolling such shaped wires namely arise on the Circumferential areas where the profile line bends strongly, particularly high pressures, and unfavorable results Changes in the structure of the material, in particular lengthening of the grain dimensions, which in turn greater hardness and higher internal tension

· * Has consequences which in turn can lead to cracks. By This inhomogeneity in the individual wire shape is also made more difficult for stranding, and when the outer form wire layer, it can be difficult to get them to lie snugly against the core on which they are placed is beaten. This prevents the appearance of waves and other unevenness of the association Finally, it is difficult to determine the accuracy of the cross-sectional shape of the shaping wires to achieve a uniformly high degree over the entire length of the same.

The object of the present invention is to provide a method for producing a shaped wire layer to be designed in such a way that a fully closed position in the sense is reliably achieved is that the individual wire on emerging from the association in a radial or approximately radial direction is hindered and in which nevertheless with shaped wires a relatively simple and roughly calibrated initial cross-sectional shape can be worked.

To solve this problem there are two alternatives suggested. The first is based on a method of the type mentioned at the beginning, which is characterized by the use of shaped wires, the starting cross-section of which is roughly the same as the shape an 8 with one or two axes of symmetry, the longitudinal axis of symmetry of the before pressing Cross-sections of the shaping wires at an acute angle with the corresponding radial of the product is brought and the wires are pressed to the mutual, radially effective form fit.

The second alternative is based on a method of the type mentioned above, but in which the The output cross-section of the shaped wires has an elongated shape with roughly parallel flanks and asymmetrical, on which one of the flanks has a tapering, and it is proposed according to the invention, that the shaped wires are applied upright with an asymmetrical bevel pointing towards the core and up to mutual, radially effective positive locking are pressed. The latter method is the US-PS 21 22 911.

The plastic deformation is expediently in both types of process until one is achieved smooth surface.

If wire ropes, cables or other similar products with several within the meaning of the invention full sealed layers are to be produced, each of these layers is sequentially in the specified Way plastically deformed.

The method according to the invention does not place high demands on the manufacturing accuracy of the Form wires for the closed position, as the wires only get their final shape when they are pressed together obtain. When pressing together the entire form wire layer, even if it is imprecise manufactured wires, there are wire surfaces that nestle and touch one another in the whole deformed position what at the

known production of a fully closed shaped wire layer even with the highest manufacturing accuracy of the tool profile used for the production of shaped wire and the wire shape obtained in this way would be attainable.

In this way, the method according to the invention enables the working caliber to be simplified, larger ones Allowing tolerances in terms of wire shape and dimensions and an advanced manufacturing process, namely to pass over the rolling of the forming wires used to produce the closed layer.

A further simplification consists in the fact that the core on which the Fcrmwrahtschicht is struck off Round wires can exist. The compression has such a depth effect that there is a certain plastic deformation also has the consequence of the round wires, so that all wires cling to each other Form wires are formed by redistributing the material of the starting wires, the cross section of the product largely filled with material and a smooth cylindrical surface of the Product is obtained.

In the method according to the invention, as with all methods with plastic Deformation - during plastic deformation to a redistribution of when hitting in the wires occurring tensions, so that there is no risk of later untwisting. These tensions will be evenly distributed over the wires, which is beneficial to the overall working capacity of the Wire rope affects and the resistance to the formation of ripples, spirals and the like Structural defects increased.

The invention is illustrated by the description of exemplary embodiments with reference to the drawings further explained. It shows

F i g. 1 in a schematic representation of the creation of a closed layer from 8-shaped wires,

F i g. 2 different possibilities of the structure of the core on which the shaped wire layer is struck,

F i g. 3 e.g. starting cross-sectional shapes of the shaped wires,

4 shows the generation in a schematic representation a closed layer of wedge-shaped wires with a tapered end,

F i g. 5 shows a schematic representation of the production of a closed layer from wedge-shaped wires with two tapered ends.

The core 1 of the rope or cable product to be manufactured is in the usual way by hammering Round or shaped wires, possibly with subsequent plastic, bundle and (or) layered Compression made of the same. As a result of the compression, the round wires get the core 1 shaped wire cross-sections that fit snugly together.

Some possible designs of the core are shown in FIG. 2 shown. On the left is a structure made of round »wires 3 and rectangular wires 4 shown; in the middle is a structure of round wires 3, rectangular Wires 4 and X-shaped shaped wires 5 in connection with round wires 3 and a structure on the right made of plastically compressed strands 6 and wound onto it like a mandrel and then onto it compressed, originally round wires 7 shown.

Other embodiments of the core 1 of the product are also possible. It is only important that one or more layers of the core which lie directly under the closed shaped wire layer 2, a structure s that make it possible to use this core as one To use support mandrel in the plastic compression of the shaped wires 4 struck on them.

When manufacturing hollow products, a removable mandrel can be used instead of the core 1

ίο be.

A layer of 8-shaped or similarly shaped shaped wires 8 (Fig. 3) is then placed on the core 1 beaten. An 8-shaped wire with two axes of symmetry in the cross-sectional plane is an 8-shaped one

wire with only one axis of symmetry is preferable because it is it does not depend on which of its two thickened parts rests on the core 1

Gaps 9 remain between the thickened parts of the wires 8, which redistribute them of the wire material, so that the transition from an 8-shaped starting cross-section to a cross-section as shown at 10 is possible.

The plastic deformation with redistribution of the material takes place by pulling, rolling Balls, rollers or cylinders or by another of the known compression deformation processes. In Fig. 1 is the principle of the mentioned method for producing the fully closed layer by plastic compression shown by rolling a roller 11

JO represents

During the plastic compression, the cross section of the wire 8 is given the shape of an element 12 and then that of an element 10, the spaces 9 almost completely disappearing. A little

Distance remains in the finished product only due to

the elastic resilience of both the layer 2 itself and to an even greater extent due to the elastic resilience of the core 1.

In this way, the product receives after

plastic compression a reliably sealed layer that has increased strength and better operating properties. The outer radius of the product decreases from R \ before the deformation to R ₂ after the deformation. The deformation can easily be connected to the laying of the rope and can be carried out directly during the same.

A closed shaped wire layer can be obtained if the starting cross-section differs from the previous one 8-shape considered differs somewhat. Also, wedge-shaped wires 13, 14 (FIG. 3) come into question one or two asymmetrically tapered ends.

In the case of plastic deformation, the elements 13 and 14 are given the shape of elements 15 and 16, respectively (Fig. 4, 5). In doing so, as from the drawings can be seen, the tapered ends deformed during plastic compression so that their material in the opposite cavity is displaced and in this way a form-fitting association of

Form wires 15 or 16 is created

If a product has to be beaten with more than one layer, each of these layers will open separately plastically deformed in the manner described with each of the underlying layers playing the role of a

b> Playing doms.

For this purpose 2 sheets of drawings

Claims (3)

Patent claims: 1. Process for the production of a closed molded wire layer for wire ropes, cables and the like Stranded products in which shaped wires are wrapped around a core and then through on this Pressing plastically deformed and brought into full contact with one another and with the core are characterized by the use of shaped wires, their starting cross-section has approximately the shape of an 8 with one or two axes of symmetry, before pressing the longitudinal synimetric axis of the cross-sections of the shaped wires at an acute angle with the corresponding radials of the product are brought and the wires up to the mutual radial effective form fit are pressed. 2. Process for the production of a closed shaped wire layer for wire ropes, cables and the like Stranded products, in the case of shaped wires, the output cross-section of which has an elongated shape with approximately parallel flanks and asymmetrical, to which one of the flanks has tapering bevel hit a core and then plastically deformed it by pressing it to a full contact are brought together and with the core, characterized in that the shaped wires Applied upright with a bevel pointing towards the core and radially up to the mutual effective form fit are pressed. 3. The method according to claim 1 or 2, characterized in that the plastic deformation up to is carried out to achieve a smooth outer surface of the shaped wire layer.