CZ166096A3 - Process and apparatus for forming steel cables to helix - Google Patents

Abstract

A method of shaping steel ropes for a spiral line, in particular coated wire for cable locks when the steel wire (6) is bent in the rotary groove (5) of the rotary shaping pulley (1), the parts of its perimeter which are lapped by the endless belt (2) between the belt (2) and the walls of the rotary groove (5) and the angle speed of the rotation of the shaping pulley (1) is in fact identical to the angle speed of the lapped endless belt (2), as well as carrying steel wire (6) and after the whole length of the steel wire (6) has passed between the shaping pulley (1) and the lapped endless belt (2) the steel wires of the rope (6) on each its end are fixed against mutual shifting. The equipment for doing this consists of a rotary shaping pulley (1) equipped with a round groove (5) the width of which corresponds to the diameter of the shaped wire (6) and of the pressure element producing radial pressure of the shaping wire (6) to the round groove (5) where the shaping pulley (1) is placed between the first leading pulley (3) and the second leading pulley (3') through which there is fastened the endless belt (2) overlapping the part of the perimeter of the shaping pulley (1) and the angle of the lapping depends on the diameters, as well as the mutual position of the pulleys (1,3,3') the axes of rotation of which are in fact parallel and the depth of the round groove (5) is smaller than the diameter of the shaped rope (6).<IMAGE>

Description

Method and apparatus for forming steel wire ropes into screws. οΐξοο

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a method and apparatus for forming a single-strand or multi-strand steel wire into a helix, in particular a sheathed strand. cable locks.

BACKGROUND OF THE INVENTION

When connecting two components whose relative distance varies or can change within certain limits, conventional cables of variable length are used, which are helically shaped, allowing a relatively large elongation of the cable when expanded. Such cables are used, for example, in robots, telephone sets, but also in so-called so-called cables. cable locks, wherein the cable formed in this way, formed from a steel cable, replaces the lock yoke.

Sheathed cables, which are mainly intended for conducting electric current, are usually formed by being coiled in a helical manner onto a mandrel and then cooled, whereby the insulating layer of the cable obtains so-called &quot; shape memory, which then keeps the cable in the shape of a helix. However, this method of forming a cable into a helix is only suitable for cables consisting of a smaller number of conductors of small diameter and low strength, where the molded sheath or sheath is formed. the insulating layer is able to maintain the helical shape of the entire conductor.

For steel ropes which are braided from a plurality of steel wires forming one or more braided strands and which are provided with a relatively soft sheath, this method is not applicable. The methods known from shaping helical springs or shaping are therefore employed

not known per-; driven in a centralized manner by winding the wire into a circle, where the shape memory acquires the wire and the sheath, respectively. insulation.

According to the SU-certificate 1 796 330, there is a pulley having a circular forming groove on its periphery in order to bend the wire into a circle consisting of the pulley tongues, in which the wire is bent into a circle at an angle of approximately 270 °. The radial thrust of the wire into the groove to provide sufficient frictional force required for its pulling and overlapping is provided by the thrust roll. A disadvantage of this apparatus and the method of forming therein is the need for a high specific pressure between the pressure roller, the wire and the driven forming roller, which, when shaping the sheathed or sheathed sheaths. of the insulated wire or rope, on the one hand, disrupted the sheath and, on the other hand, would not permit mutual displacement of the individual wires in the case of strands of braided ropes one after the other.

and

Similar disadvantages of damage to the casing respectively. Insulation of the wrought steel wire would also provide another known method of forming a wire into a helix, wherein the wire, one end of which is anchored in the rotary mandrel, is helically wound onto the rotary mandrel between, the outer cylindrical surface of the rotary mandrel and the fixed forming sleeve.

SUMMARY OF THE INVENTION

The aforementioned disadvantages are substantially eliminated by a method of forming steel ropes into a helix, in particular a sheathed steel cable for cable locks, which consists in that the rope is continuously bent in the circular groove of the rotating forming pulley along a circumferential section wrapped by an endless belt between belt and round walls The angular speed of rotation of the forming pulley is substantially equal to the angular velocity of the endless belt wrapped therein as well as of the entrained rope, and after passing the entire length of rope between the forming pulley and endless belt wrapping, the steel wire wires at each end are secured against mutual displacement .

This method allows the rope to be shaped into a preloaded helix with the rope threads closely adjacent to each other because the threads are formed without rising into a circular shape. The shaping takes place at a relatively low specific pressure between the forming tools and the rope, i.e. between the endless belt, the rope and the circular groove of the forming pulley, without friction between them and without stressing the rope, which together allows the axial displacement of the steel wires the wire is braided, one after the other, wherein the shape memory of the wires is still secured by the fixed connection of the wires to each end section of the rope.

From a technological point of view, it is advantageous to clamp the wires at each end of the cable with a sleeve-shaped end.

In order to carry out the above method, a helical wire rope forming device consisting of a pulley having a circular groove, the width of which corresponds to the diameter of the wire to be formed, is characterized in that the depth of the circular wire is less than the diameter of the wire. the forming pulley is wrapped over a portion of its circumference by an endless belt extending across the first guide pulley and the second guide pulley, the axes of which are substantially parallel to the axis of rotation of the forming pulley.

This device permits the continuous application of a relatively low specific pressure with which the rope is formed over the entire belt section of the forming roller without friction between the rope and the forming groove or the like. endless belt and rope tension.

In order to allow adjustment of the wrapping angle of the forming pulley by an endless belt, and thus the choice of the diameter of the helix to be formed, it is advantageous if the forming pulley is mounted in a frame adjustable in a direction perpendicular to the drawbar plane determined by the axes of the guide rollers.

In order to be able to use forming rollers of different diameters and thus to form helixes of different diameters in relation to the wrapping angle, it is advantageous if at least one guide roller is arranged in the frame in an adjustable manner in the direction of the opposite guide roller.

In order to eliminate pressure surges between the rope and the forming tools, it is advantageous if at least one guide pulley is supported in the frame in an elastic manner.

In order to obtain the most favorable force conditions for driving the forming rope between the forming pulley and the endless belt, it is advantageous if the endless belt is driven by the drive roller.

Furthermore, it is advantageous if the endless belt is designed as a toothed belt due to the transmission of greater forces.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 shows schematically a device, Fig. 2 shows a partial cross-section of a forming pulley, Fig. 3 shows a cross-section of a steel wire before forming, and Fig. 4 shows a partial cross-section of a steel wire after helical shaping. and fixing the ends.

DETAILED DESCRIPTION OF THE INVENTION

As is apparent from the accompanying drawings, the device consists of a freely rotatable forming roller which is wrapped around a circumference, in the illustrated example at a central angle of 180 °, by an endless belt 2 which is guided over the first guide roller 2 and second guide roller 3 and drive roller 4 The guide pulleys 3, 3 are freely rotatably mounted on the frame T and the drive pulley 4 _f, which is driven by an electric motor in the usual manner, is mounted on the frame 7 and serves to tension the endless belt 2. The endless belt 2 is on the side in contact with the drive roller 6 and the guide rollers 3, 3 _{, it} has a toothing 13 and is smooth on the opposite side. The forming pulley 1 is provided with a circular forming groove 5 (see FIG. 2), the depth of which is smaller than the diameter of the formed steel wire 6, provided with the elastic sheath 9, respectively. Insulation and its width is substantially equal to the diameter of the steel rope 2 with the flexible casing 2. The forming pulley is rotatably mounted in the bearing housing 10, which is mounted in the frame 7 of the device adjustably in a direction perpendicular to the plane. The first guide pulley 2 is mounted rotatably in its bearing housing 11, the second guide pulley 2 is also mounted in its bearing housing 12, the two bearing boxes 21/12 being mounted in the frame 7 of the device in an adjustable direction in each direction opposing guide rollers 2/2 · Adjustable bearing housing 10 of the forming roller 2 allows changing the wrap angle of the forming roller 2 ^and adjustable bearing housing 21/12 of the guide rollers 2/2 allows the use of forming rollers 1 of different diameters. driven by the driving pulley 2, is carried out by a tensioning z The relatively flexible bearing of the axles 0, 2, 3 of the guide rollers 3, 3 in the frame 7, which is carried out by silentblocks 22, 15 ' ^{in the} bearing housings 11, 12, ensures a smooth operation of the device and eliminates possible shocks. due to the rise of the rope 2 of the forming groove 2 'of the manufacturing tolerances in the diameter of the rope 6 and the like.

Of course, it is also possible within the scope of the invention to use other relatively resilient bearings, for example a diaphragm spring, etc.

The helix is formed in the described apparatus as follows:

The steel cable 6 provided with a flexible sheath 2 / ^preferably already cut to the required length and stripped at the ends of the sheath 2 (see FIG. 3) is inserted with one end into the forming groove 5 of the rotating molding roller _ [from the leading end beneath an endless belt 2 The endless belt 2, which is driven by the drive pulley 4 and which drives the forming pulley, presses the steel cable 6, which in the forming groove 5 extends over the outer diameter of the forming pulley ^{to the} bottom of the forming groove (see Fig. 2). bends along the length of the wrapping of the forming roller 1 into a circular shape. When the rope is bent, the steel wires are axially displaced relative to one another,. from which the rope is intertwined, and in the case of multi-strand ropes 6, to feed the individual strands one after another, on the one hand to their permanent deformation into a circle with a diameter which depends on the diameter of the forming groove 5 and the wrapping angle jk. 6 is carried and pressed into the circular groove 5 of the forming pulley by a relatively elastic endless belt 2, there is no slip between the endless belt 6 and the elastic sheath 2 of the rope 6 and thereby breaking the sheath 2 coiled into a helix and resembles a preloaded spring whose coils tightly engage each other as a result of circular forming (see Fig. 4). Thereafter, each end portion of the cable 6 which is devoid of the flexible envelope _9, ^northern NENA clamping terminal 8, which mutually fixes the steel wires and / or strands of rope at each end together. Within the scope of the invention, it is also possible to fix the steel wires to each other at the ends of the rope, for example by gluing, casting and the like.

Industrial applicability

The method and the apparatus for forming steel wire ropes according to the present invention can be used in the manufacture of wire or cable ropes. of a cable connector between two elements, the distance or the length of the connecting member varies within a certain range, such as, for example, a cable lock yoke, a belay line between the trailer and the towing vehicle, and the like.

Claims (8)

Patent claims 1) A method of forming steel ropes into a helix, in particular a sheathed cable for cable locks, characterized in that the rope is continuously bent in the circular groove of the rotating forming pulley along a part of the circumference wrapped by an endless belt. Between the belt and the walls of the annular groove, the angular speed of rotation of the forming roller being substantially equal to the angular velocity of the belt wrapped therein. of the endless belt as well as of the entrained steel wire and after passing the entire length of the steel wire between the forming pulley and the endless belt wrap, the steel wire wires at each end thereof are secured against mutual displacement. 2. A method of forming steel ropes according to claim 1, characterized in that the steel wires of the rope at each end thereof are clamped by a sleeve-shaped terminal. (3) A device for forming helical wire ropes, in particular a sheathed cable lock cable consisting of a forming pulley, provided with a circular forming groove whose width corresponds theoretically to the diameter of the forming cable, characterized in that the depth of the circular forming groove (5) is smaller than rope (6), that the forming pulley (1) is wrapped around its circumference by an endless belt (2), guided through the first guide pulley (3) and the second guide pulley (3), whose axes of rotation (0 ^, 0 ^) are substantially parallel to the axis of rotation of the forming roller (1). Helical wire rope shaping device according to claim 3, characterized in that the forming pulley (1) is mounted in the frame (7), adjustable in a direction perpendicular to the plane (CJ) defined by the guide pulley axes (0, 1, 2). (3). A helical wire rope forming device according to claim 3, characterized in that the at least one guide pulley (3, 3) is arranged in the frame (7) in an adjustable manner in the direction of the opposite guide pulley (3, 3). 5 A helical wire rope forming device according to claim 3, characterized in that at least one guide pulley (3, 3) is supported in a spring-loaded frame. Helical wire rope forming device according to claim 3, characterized in that the endless belt (2) is driven by a drive roller (4). A helical wire rope forming device according to claim 3, characterized in that the endless belt (2) is provided with a toothing (13) on one side.