WO2008132374A2

WO2008132374A2 - Cabling device for performing direct cabling on two components or filaments using a twisting spindle

Info

Publication number: WO2008132374A2
Application number: PCT/FR2008/050472
Authority: WO
Inventors: Carlos Matas
Original assignee: Ritm
Priority date: 2007-03-28
Filing date: 2008-03-19
Publication date: 2008-11-06
Also published as: FR2914320A1; FR2914320B1; WO2008132374A3

Abstract

The spindle is firmly attached to a drive element (19), the first filament (F1), which enters via the end (4) of the spindle, re-emerges radially from this spindle at a plate (5) thereof, which rotates thereby forming a balloon shape (6), the second elementary filament (F2), which is paid out from one or more reels (8) located in a can (7) positioned above the spindle (3), passes through a braking device (9), the two filaments (F1, F2) come together at a cabling head (11) that is designed to equalize the progress of the two filaments (F1, F2) and their respective tensions by passing them over at least one rotary assembly (12) comprising tracks onto which said filaments are wound separately. The cabling head (11) comprises an auxiliary electric drive element (18). The auxiliary drive element (18) and the drive element (19) that drives the twisting spindle (3) are powered by one and the same control system (20) so that said drive elements revolve at the same speed, give or take slippage, which slippage manifests itself in a variation in the angular offset between the spindle (3) and the cabling head (11) corresponding to self-balancing of the tensions in the filaments (F1, F2). REFERENCE: Figure 2

Description

Wiring device for performing a direct wiring process of two components or wire, by means of a torsion pin

The invention relates to the technical field of the transformation of continuous elongated materials, in particular textile yarns, for the production of "cords", ie elongated textile elements obtained by an assembly, by torsion, of at least two continuous elongated material components or elementary wires.

It relates more particularly to an improvement made to the so-called "direct wiring" process and to the device used to carry out this method, which consists in assembling two elementary wires by means of a torsion pin.

The term "elementary wire" will be used hereinafter as one of the two components that forms part of the cable. An elementary wire may be an elongated material, a textile thread or a son assembly, said assembly may have been made upstream or by parallel feeding of several food coils.

In general, the "direct wiring" method is well known to those skilled in the art. A first elementary wire (F1) is taken from a source, for example a coil (1), passes through a braking device (2), arrives at the lower end of a torsion pin (3), passes through the axial and radial channel (4) of said torsion pin and opens on the periphery of a plate (5) integral with the spindle (3) and rotating with it. Due to the rotation of the spindle, this elementary thread (F1) undergoes a false twist and forms a balloon (6) which surrounds a pot (7) disposed on the upper part of the spindle (3). This pot is not integral in rotation with the spindle and its rotation on itself is prevented by means not shown.

Inside this pot is disposed a coil (8) of a second elementary wire (F2). This wire (F2) passes into a braking device (9) carried by the pot or its lid. The wire (F2) then joins the wire (Fl), above the pot at a point called "cabling point" (10), the two son being due to the rotation of the wire (Fl) relative to the wire (F2 ) twisted together to form a cabled wire (FC) which is then pulled by a call device (16) and received on a coil (17). A solution of this type is illustrated in FIG.

As is apparent from the teaching of the French patent FR2565261, for certain applications, such as for example for the tire industry, stringy yarns having a very high strength are required, and for which the stresses and twists involved in Wiring course should be strictly controlled and regular over the entire length of the cable. For this, the usual "direct wiring" method does not achieve such a regularity, and devices have been proposed, usually referred to as "wiring head" (11) which, in combination with an optimized wire path, have made it possible to obtain a very regular wired wire constitution in which the voltages between the elementary wires are distributed regularly.

The wiring head (11) is a rotating system disposed above the spindle (3) and therefore the pot (7), in the extension of the axis of the spindle (3) and rotatable about this axis , either freely or possibly by an auxiliary drive means. The wiring head is equipped with at least one rotating assembly (12), having two tracks whose rotation is synchronized, around which the two elementary son (Fl) and (F2) can be wound separately before reaching the wiring point (10).

French patents FR2632981, FR2632982, FR2751667, FR2667879 and FR2673956 show, by way of non-limiting examples, various embodiments of such a device.

It is observed that they comprise one or two rotating assemblies (12) on an axis perpendicular to the axis of rotation of the wiring head itself. The two tracks around which the threads are wound are constituted by two grooved pulleys. Whatever the embodiment, the speed of the son and the peripheral speed of the tracks are substantially equal, so that the contact is without significant slip. Since the two tracks are rotationally connected, they tend to synchronize the advancement of the two wires, and by transferring the driving torque, to equalize the voltages in the two wires before they reach the wiring point.

It is observed that according to these different embodiments the elementary wire (Fl) forming a balloon, enters the wiring head by an eyelet (13) disposed at its periphery, so that the said wiring head (11) is driven in rotation by the wire itself. It is also observed that the elementary wire (F2) coming from the pot (7) via the braking device (9) penetrates axially into the wiring head via an eyelet (14) on which it changes direction to reach its track on its rotating assembly of entrance. Finally, it is observed that the wired wire (FC) emerges from the wiring head by an eyelet (15) disposed generally at or slightly above the wiring point (10) (Figure 1).

It has been demonstrated that this arrangement of the thread path in the regulator creates friction on the inlet guide eyelets (13) and (14). on which the wire forms a docking angle. It has been shown that these frictions cause an increase in the tension in the elementary wires (Fl) and (F2), and contribute to a degradation of their structure. In all cases, this results in a decrease in the final resistance of the wired wire (FC).

Another disadvantage of the wiring heads according to the arrangements described above is related to its rotational drive by the wire (Fl) which forms the balloon. For this, the wire is guided at its entrance by an eyelet or the sides of a pulley so that pulling the wire in the rotating ball creates a sufficient torque for this drive. This results in additional tensions and friction forces. This phenomenon is particularly sensitive when starting the position, during which the wire must provide, in addition to the drive torque, an acceleration torque of the wiring head.

It has been proposed to drive the wiring head by mechanical means as is apparent from the teaching of patent EP0313877, or by an auxiliary motor as proposed by the patent FR2632982. These devices are complex and have great difficulty of implementation in particular because of the requirements of synchronism with the spindle, given the helix angle that the wire (Fl) in the ball and its variations.

Now it has been found, and this is the object of the present invention, a safe and rational way to solve these problems relating to friction, threading, and access. The invention therefore relates to an improvement of a known method of direct wiring of two components or wire by means of a torsion pin, the first elementary wire penetrating through the end of the pin, emerging radially at the level of the plate of the rotating and forming a balloon, the second elementary wire being unwound from one or more coils disposed in a pot placed above the pin through a braking device, the two son being joined by means of a head of wiring rotated by the elementary wire which forms the balloon, and wherein the advancement of the two elementary wires and their respective voltages are equalized by the passage on at least one rotating assembly comprising tracks whose rotation is synchronized, on which they curl.

In order to solve the problem of limiting the tensions and friction caused by the rotational drive of the wiring head which contributes to the degradation of the cord or its components, according to the invention,

the wiring head comprises an auxiliary motor element,

the auxiliary motor element and the motor element of the torsion pin are fed by the same control system, so that said motor elements rotate at a speed equal to, or equal to, a slip, which sliding This results in an angular offset variation between the pin and the wiring head corresponding to self-balancing of the tension of the wires.

According to a preferred embodiment of the invention, the motorization elements are ac motor elements. According to this embodiment, the drive elements are of the synchronous type.

Advantageously, at least one of the motor elements and asynchronous type.

The control system is a frequency converter

According to this embodiment, the motor element of the wiring head provides, at the operating point corresponding to the speed of production, in the presence of the wires, a motor torque less than the torque necessary to drive said wiring head, the torque additionally to ensure synchronism with the spindle, being provided by pulling the wire from the balloon.

Or, the motor element of the wiring head provides, at the operating point corresponding to the speed of production, in the presence of the wires, a motor torque greater than the torque necessary to drive the said wiring head, the torque of retained to ensure synchronism with the spindle, being provided by pulling the wire from the balloon.

According to a first embodiment of a machine equipped with a plurality of work stations each equipped with a motorized spindle and a motorized wiring head, the motorized spindle and the motorized wiring head of each station are connected to a common alternating power supply circuit powered by a single frequency converter for a set of adjacent workstations, possibly via a contactor allowing a stop and an individual restart of each work station.

According to a preferred embodiment of a machine equipped with a plurality of work stations each equipped with a motorized spindle and a motorized wiring head, the motor spindle and the motorized wiring head of each station are connected to an independent frequency converter, allowing starting, speed regulation and stopping of the workstation independently of adjacent positions.

The invention will be better understood by means of the accompanying drawings, given by way of example.

The figure is a general diagram showing, according to the state of the art, the direct wiring method, the wiring head shown there being driven solely by the balloon wire.

Figure 2 is a block diagram showing, according to the invention, the direct wiring method, the wiring head shown therein being driven by an auxiliary drive element. Fig. 3 is a diagram showing the centralized power mode of a plurality of workstations according to the invention.

Figure 4 is a diagram showing the independent frequency converter power supply mode at each workstation.

The invention thus relates to an improvement of the direct wiring method of two components or wire by means of a torsion pin (3), the first elementary wire (F1) penetrating through a channel (4) of the hollow pin, radially emerging of it at its plateau (5) rotating and forming a balloon (6) around the pot (7). The second elementary wire (F2) is unwound from one or more coils arranged in a pot (7) placed above the spindle via a braking device (9). The embodiment of such a device and its use are known to those skilled in the art and are not detailed here. The two son (F1, F2) are joined by means of a wiring head (11) in which the advancement of the two elementary wires and their respective voltages are equalized by the passage on at least one rotating assembly (12) each comprising tracks on which they curl. The torsion pin (3) is rotated by a drive element (19).

In order to solve the problem of limiting the tensions and friction caused by the rotational drive of the wiring head (11) which contributes to the degradation of the cord or its components, according to the invention, the wiring head (11 ) has an auxiliary motor element (18). This auxiliary motor element (18) is fed by the same control system (20) as the motor element (19) of the torsion pin. As a result, by means of this single control system (20), the spindle drive element (19) and the drive element of the wiring head (18) rotate at an equal speed. , or differ from a slip value, which slip results in an angular shift variation between the pin and the wiring head.

According to a preferred embodiment of the invention, the motor elements (18) and (19) are ac motor elements. The control system is a frequency converter (20). According to this embodiment, the motor elements (18) and (19) are synchronous type. Under these conditions, they drive the torsion pin (3) and the wiring head (11) at an equal speed.

Due to the winding of the wire (Fl) on a portion of the cylindrical track arranged under the plate (5), which the skilled person refers to as "reserve" and the helix angle formed by the wire ( Fl) in the balloon (6), the angular phase between the pin (3) and the wiring head (11) change during the start and stop phases and are subject to variations around an equilibrium value all along the production. These variations are inevitable during the start-up and shutdown phases and remain useful during production because they constitute a means of damping possible voltage jolts for example caused by unevenness of the wire.

In view of the problem to be solved by adapting to the angular phase variations between the pin (3) and the wiring head (11), advantageously, according to this embodiment, at least one of the driving elements (18) and (19) is of the asynchronous type.

By adopting at least one asynchronous motor element, the direct wiring system thus formed, allows a small variation in speed (sliding) of one of the members relative to the other, which will therefore allow the phase variation. angular between the two organs.

This feature can be achieved by using a synchronous type motor element (19) for the spindle (3) and an asynchronous motor element (18) for the wiring head or, according to a preferred embodiment using two asynchronous type motor elements.

According to any of these embodiments, it is the wire which connects and thus synchronizes the pin and the wiring head by forming a balloon having a winding arc or a helix angle, which generates an angular offset. . The driving elements (18, 19) can be dimensioned:

- so that the motor element (18) of the wiring head (11) provides, at the operating point corresponding to the production speed, in the presence of the son, a torque less than the torque required to drive said head wiring, the torque additionally to ensure synchronism with the pin (3) being provided by pulling the wire from the balloon. - or, so that the motor element (18) of the wiring head (11) provides, at the operating point corresponding to the production speed, in the presence of the son, a motor torque greater than the torque required for training of said wiring head, the retaining torque to ensure synchronism with the pin being provided by pulling the wire from the balloon.

According to a first embodiment of a machine equipped with a plurality of work stations each equipped with a motorized spindle (3, 19) and a motorized wiring head (11, 18), the motorized spindle and the motorized wiring head of each station, are connected to a common AC power supply circuit (21) powered by a single frequency converter (20) for a set of adjacent workstations (Figure 3). Optionally a contactor (22) allows a stop and an individual restart of each workstation.

According to another preferred embodiment of a machine equipped with a plurality of work stations each equipped with a motorized spindle

(3, 19) and a motorized wiring head (11, 18), the motorized spindle and the motorized wiring head of each station are connected to an independent frequency converter (20), allowing the starting, the regulation of speed and stopping the workstation regardless of adjacent positions (Figure 4).

According to this embodiment, the spindle (3) can be equipped with a speed sensor, and each working position can be equipped with a control system that regulates the closed-loop spindle speed by means of a system. enslavement known. The rotation of the wiring head (11) is not enslaved by a separate closed loop, its speed being synchronized by the fact that its rotation is controlled by the same control system, with variations of angular phase.

The advantages are apparent from the description.

Claims

A wiring device for performing a method of direct wiring of two components or wire (F1, F2) by means of a torsion pin (3) secured to a motor element (19), the first wire (F1) penetrating by the end (4) of the spindle, emerging radially therefrom at a plate (5) thereof, rotating and forming a balloon (6), the second elementary wire (F2) being unwound from one or more coils (8) arranged in a pot (7) placed above the pin (3) via a braking device (9), the two wires (F1, F2) being connected by means of a wiring head (11) for equalizing the advance of the two son (Fl), (F2) and their respective voltages by passing over at least one rotating assembly (12) having tracks on which said son wind separately, characterized in that - the wiring head (11) comprises an auxiliary electric motor element (18),

- the auxiliary motor element (18) and the motor element (19) of the torsion pin (3) are fed by the same control system (20), so that said motor elements rotate to a a speed equal to or equal to a slip, which slip results in an angular offset variation between the pin (3) and the wiring head (11) corresponding to a self-balancing of the tension of the wires (F1), ( F2).

2. A wiring device according to claim 1, characterized in that the motor elements (18, 19) are AC motors.

3. A wiring device according to any one of claims 1 to 2, characterized in that the motor elements (16, 19) are synchronous type.

4. A wiring device according to any one of claims 1 to 2, characterized in that at least one of the motors (18, 19) and asynchronous type.

5. A wiring device according to any one of claims 1 to 4, characterized in that the control system (20) is a frequency converter.

6. A wiring device according to any one of claims 4 to 5, characterized in that the motor element (18) of the wiring head (11) provides, at the operating point corresponding to the speed of production, in the presence son, a torque less than the torque required to drive said wiring head, the additional torque to ensure synchronism with the pin being provided by pulling the wire from the balloon.

7. A wiring device according to any one of claims 4 to 5, characterized in that the motor element (18) of the wiring head (11) provides, at the operating point corresponding to the speed of production, in the presence son, a torque greater than the torque required to drive said wiring head, the retaining torque to ensure synchronism with the pin being provided by pulling the wire from the balloon.

8. Machine for converting son by a direct wiring method equipped with adjacent workstations according to any one of claims 1 to 7 each work station being equipped with a motorized spindle (3, 19) and a head motorized wiring system (11, 18), characterized in that the motorized spindle and the motorized wiring head of each station are connected to a common alternating power supply circuit (21) powered by a single frequency converter (20) for a set of adjacent workstations, possibly via a contactor (22) allowing a stop and an individual restart of each workstation.

Machine for converting the wires by a direct wiring method equipped with adjacent work stations according to any one of claims 1 to 7, each work station being equipped with a motorized spindle (3, 19) and a motorized wiring head (11, 18), characterized in that the motorized spindle and the motorized wiring head of each station are connected to an independent frequency converter (20) for starting, speed regulation and stopping. of the workstation regardless of adjacent positions.

Machine for converting yarns by a direct cabling method equipped with adjacent workstations according to claim 9, characterized in that the spindle (3) is equipped with a speed sensor, and each working position is equipped with a control system that regulates the closed-loop spindle speed by means of a known servo system.