EP0631528B1 - Process and device for depositing wire loops into a drum pack - Google Patents

Abstract

A process and device are disclosed for positioning the wire (6) while the drum packs of the drum pack device are exchanged. Storage fingers (11-14) are provided for retaining the wire windings around a winding core (2) while the drum packs are exchanged. In order to prevent the connection (62) between these windings and the filled drum pack to obstruct the fall of the collected windings into the empty drum pack (4), a wire positioning device brings the hanging wire (6) into a position located below the storage finger (11-14) most favourably positioned for the drum pack exchange. The wire (6) is held in this position until the new drum pack (4) is in the winding position. The wire positioning device is then brought back to its initial position and the wire can fall without impediments into the empty drum pack (4).

Description

The present invention relates to a device for depositing wire turns in a barrel. The term "wire" should not only be understood to mean bare metal wire, but also wire that has already been processed, that is to say, for example, provided with a lacquer layer, insulation or the like, as well as coated or non-coated wire strands and the like.

Barrel winders of the type mentioned at the outset have a laying device with which wire, which is usually fed to the winder at high speed, is laid in turns around a non-rotatable cylindrical winding core arranged with a vertical axis. The winding device is designed such that, as soon as a certain number of wire turns are placed on the winding core, the lowest wire turn falls into the barrel. Due to the high wire feed speeds, this process takes place relatively quickly, so that five turns or more fall into the barrel per second.

The barrel itself is also cylindrical, the (fictitious) cylinder axis coinciding with the (fictitious) cylinder axis of the winding core. A barrel barrel, which is also cylindrical, is usually provided in the barrel and prevents the individual turns from getting tangled.

Drum winding devices have the advantage that large quantities of wire can be wound with them in a short time, which, if further processing is required, can in turn be drawn off from the drum very quickly.

A particular problem with barrel winders is changing the barrel. Due to the high speeds, the wire feed, for example from a rolling mill, a drawing system or the like, cannot be interrupted when the drum is changed. As described in DE-AS 20 38 133, it is therefore customary in the prior art to provide a number of sliding or pivotable magazine fingers arranged around the winding core, which fingers are moved towards the winding core as soon as the drum in the device is filled is. This prevents the wire windings from falling into the barrel and accumulates on the winding core. As soon as the new drum is positioned in the winding device, the magazine fingers are pulled back and the accumulated turns fall into the empty drum. This phase of the changing process is particularly critical, since it often happens that the accumulated windings tilt when falling and then sometimes get caught on the guide cylinder or on the barrel core, or get tangled in some other way. In this case, the subsequent turns of the wire can no longer get into the barrel and, due to the high wire feed speed, larger amounts of wire quickly accumulate outside the winding device. DE-AS 20 38 133 therefore proposes to design the magazine fingers in an arc shape in the manner of an iris diaphragm.

DE-OS 27 08 857 also shows a corresponding barrel winding device, in which four magazine fingers, referred to as sectors, are provided for catching the wire windings during the barrel change, which from an outer position in which they do not impair the falling of the turns into an inner position are convertible in which the turns are kept. A wire cutting device is provided between the holding device and the barrel to cut the wire during the barrel change.

DE-PS 22 13 172 shows another barrel winding device. Here, in order to prevent the turns held during the barrel change from tilting, a cylindrical extension piece is used, which is placed on the barrel core.

In the barrel winding devices described above, the wire is cut off during the barrel change. However, in many applications it is necessary that the wire be transferred from one filled barrel to the next empty barrel without interruption. This is especially the case if the barrel winding takes place within a closed production process and the wire wound in the barrels is then subjected to further processing.

If the full drum is then pushed laterally out of the winding device, there is a continuous piece of wire that extends from the filled drum to the winding core, onto which wire windings are continuously placed even during the changing process. If the magazine fingers are then withdrawn, there is a risk that the coils will tilt when falling into the empty drum, compared to the devices in which the wire is changed is cut, significantly increased. If one takes into account that the filling of the drum takes only a few minutes in some applications and therefore several drum changes have to be carried out per hour, it becomes clear that problems when changing the drum can cause a considerable malfunction.

It is therefore an object of the present invention to provide a barrel winding device and a method for positioning wire in a barrel winding device during the barrel change, by means of which the problems mentioned, i. thus in particular the tilting of the wire windings collected on the winding core during the barrel change does not occur when falling into the empty barrel.

This object is achieved by the subject matter of claim 1. The method according to the invention is the subject of claim 6.

Preferred developments of the invention are the subject of the dependent claims.

The present invention for the first time creates the possibility of positioning the wire during the barrel change so that it is always essentially in the same position that does not prevent the accumulation of coils from falling. To achieve this, a number of movable wire positioning fingers are provided which are guided on a rotatable ring which is arranged concentrically with the winding core, the positioning fingers being located below the magazine fingers. However, while the magazine fingers are all being moved towards the winding core at the same time in order to keep the accumulating wire windings there, the Movement of the positioning fingers with respect to the winding core is controlled so that the positioning fingers are moved in succession during a rotation of the ring holding them so that they come into abutment against the winding core one after the other. This ensures that, regardless of the position in which the wire is located before the positioning device is started, the wire is always held by the first positioning finger that comes to bear against the winding core. This makes it possible to stop the rotation of the ring in such a way that the wire does not fall into the barrel due to the wire connection to the previously used, now filled barrel. This reliably prevents the wire twists falling into the barrel from tilting and ensures that the barrel changing process runs safely.

The invention will now be described in detail with reference to the figures, it being pointed out that all features mentioned in the description are to be regarded as belonging to the invention.

Fig. 1A bis 1D

eine Prinzipdarstellung einer Faßwickelvorrichtung gemäß dem Stand der Technik während des Faßwechselvorgangs, zur Erläuterung der der Erfindung zugrundeliegenden Problematik;

Fig. 2

in einer Prinzipskizze eine Seitenansicht der erfindungsgemäßen Faßwickelvorrichtung mit einer Drahtpositioniereinrichtung;

Fig. 3

eine Schnittdarstellung der Faßwickelvorrichtung gemäß Fig. 2 von oben gesehen, wobei sich die Elemente der Drahtpositioniereinrichtung in ihrer Ausgangsstellung befinden;

Fig. 4

eine Darstellung entsprechend Fig. 3, bei welcher sich die Drahtpositioniereinrichtung in ihrer Endstellung befindet.

The drawing shows:

1A to 1D

a schematic diagram of a barrel winding device according to the prior art during the barrel changing process, to explain the problem underlying the invention;

Fig. 2

in a schematic diagram a side view of the barrel winding device according to the invention with a wire positioning device;

Fig. 3

a sectional view of the barrel winding device according to Figure 2 seen from above, wherein the elements of the wire positioning device are in their starting position.

Fig. 4

a representation corresponding to FIG. 3, in which the wire positioning device is in its end position.

The technical problem on which the invention is based will now be explained in detail with reference to FIGS. 1A to 1D.

In Fig. 1, a conventional barrel winding device is shown schematically, which has an outer jacket 1, and a concentrically arranged, fixed cylindrical winding core 2. Wire windings are placed on this winding core with a laying device, not shown in the figures. A device (not shown in the figures) is provided on the winding core, which means that after reaching a predetermined number of wire windings on the winding core, the lowest wire winding falls into a winding drum 4 arranged exactly vertically below the winding core.

The winding drum 4, which is usually composed of a metal rod, has an outer drum casing 4 and an inner drum core 5 arranged concentrically therewith.

The barrel winding device is arranged, for example, behind a wire drawing machine provided for non-ferrous metals and winds it out of the machine at a high rate Wire running out of speed.

The drum winding device is provided with an automatic drum changing device, by means of which the full drum moves to the left in the illustration according to FIG. 1A and an empty drum is positioned under the winding core 2. Since the production must not be interrupted during the barrel change, the wire windings that occur during this time are collected on the winding core 2. In order to prevent the wire windings from falling down, four magazine fingers 11, 12, 13, 14 arranged at the same angular distance from one another are provided, which, as soon as the first barrel is filled, are moved towards the winding core by a device (not shown). If the full barrel 4 is now moved out of the barrel winding device to the left, the connection of the wire 6, which is now further wound onto the winding core, with the wire located on the barrel, which is indicated by the wire piece 6a, remains.

This wire connection is necessary in any case if the wire wound up in the individual drums is then to be further processed without interruption. Are e.g. If barrels 1 to 10 have been filled with wire, further processing can be carried out by subsequently pulling the wire out of the last, the tenth barrel and then in the appropriate order from the other barrels.

As a rule, however, the wire connection 6a must also be present when the wire is cut between the individual barrels and the barrels are transported and processed individually. Since this processing is usually carried out again in automatic systems, it must be possible to empty it in the beginning to connect the wound wire end to the start of the wire of another barrel, for which the wire end must be accessible and must therefore be led out of the barrel before the winding process.

If the magazine fingers designated 11, 12, 13 and 14 are guided to the barrel core for changing the barrel, the wire loop lying at the bottom on the winding core can end both after the magazine finger 11 and after the magazine fingers 12, 13 and 14, so that the wire runs from one of these magazine fingers to the full barrel. If the situation arises, which is shown in FIG. 1A, that is to say the lowest wire winding ends at the magazine finger 11, the barrel change process is unproblematic. In this situation, the accumulated coils can fall into the empty barrel without interference.

The advantage of the position shown in Fig. 1A is that a wire loop is formed by the course of the wire piece 6a around the magazine finger 11 to the magazine finger 13, which, after the magazine finger 11 is retracted, is so long that the wire turns easily fall down can and be picked up by the barrel without tilting and the like.

The position according to FIG. 1B is particularly critical, ie when the lowest wire winding ends at the magazine finger 12. In this situation, the wire can either run to the central axis of the winding core, as represented by the solid piece of wire 6a, or it can extend from the center point to the full barrel, as shown by the dashed wire piece 6b. In the latter case, a knot forms, which makes the further processing of the wire considerably more difficult.

In the illustration according to FIG. 1C, the lowest turn ends at magazine finger 13. This means that the wire runs over magazine finger 13 and below magazine finger 14. If the magazine fingers are opened in this position, there is a risk that the wire loops will tilt when falling.

The same problem that arises in the situation according to FIG. 1C also arises in the situation according to FIG. 1D. Here, too, there is a risk that the wire windings will tilt when falling.

The device according to the invention will now be described with reference to FIGS. 2, 3 and 4. To simplify matters, the same reference numerals are used as in FIG. 1.

The barrel winding device has a fixed, rotationally symmetrical winding core 2, the longitudinal axis of which is arranged vertically. The winding core 2 has an upper, substantially tapering part 2a, which serves to support the wire windings, and an adjoining cylindrical part 2b, through which the wire windings are guided.

Exactly below the winding core 2 there is provided a cylindrical barrel 4 constructed from tubes, which has a cylindrical barrel core 5 which runs concentrically to the outer cylinder and which is tapered conically in its upper region 5a. The (fictitious) cylinder axis of the barrel 4 coincides with the axis 3.

A jacket 1 of the barrel winding device is arranged concentrically with the winding core 2.

In the casing 1 of the barrel winding device four magazine fingers 11, 12, 13, 14 are movably guided, which are displaceable with respect to the winding core 2. For this purpose, the winding core 2 has four openings 18 into which the magazine fingers engage.

The magazine fingers are simultaneously brought into a retracted position by a device (the position shown in FIG. 2), this device being known in the prior art and therefore not shown here.

A wire positioning device is arranged below the magazine fingers 11 to 14. The wire positioning device has a circumferential ring 30 which is arranged concentrically with the winding core 2. The ring 30 is designed as a pulley and receives on its outer circumference a V-belt 32 which is placed over a pulley 33 of a drive motor 35. In the rotatable ring, three wire positioning fingers 41, 43 and 44 are guided such that they can be moved towards and away from the cylinder axis of the winding core, as indicated by the double arrow 42 on the positioning finger 41.

Each of the positioning fingers 41, 43, 44 has a roller 46 with which it is guided on a link guide 47. The link guide 47 has a first area 47a, which extends through approximately 180 ° of a circle in which the link guide runs concentrically to the winding core. In the clockwise direction there follows a second area 47b, in which the distance between the guide and the winding core is greatly reduced. This is followed, again clockwise, by an angular range of approx. 135 °, in which no guidance is provided.

The function of this device is now as follows:
In normal operation, turns of the wire entering the winding device are placed around the winding core 2 with a laying device, not shown, in order then to fall into the winding drum 4, where they are centered there by the drum core 5. As soon as the barrel 4 is filled, the magazine fingers 11, 12, 13, 14 are moved towards the winding core and prevent further turns from falling into the barrel. The turns are then accumulated in the area between the jacket 1 and the winding core 2.

As soon as the magazine fingers are brought into their stop position, the wire positioning device is actuated. For this purpose, the motor 35 is switched on via a control device (not shown) and rotates, so that the rotatable ring 30 rotates in the clockwise direction. The positioning fingers 41, 43 and 44 also move with the ring 30, being supported on the link guide 47 with the roller 46.

The link guide 47 has a partial area 47a which is arranged concentrically to the ring 30. As long as the rollers 46 rest against this part of the link guide, their distance from the winding core does not change.

In an angular position, which is seen in the clockwise direction behind the angular position of the magazine finger 11, the link guide is bent towards the winding core 2, so that the positioning fingers in this area are brought into contact with the winding core 2 via the rollers 46.

The fact that the link guide is designed so that the positioning fingers only after the winding core Reach magazine finger 11, the wire, regardless of what position it is in, is always picked up by the first positioning finger 41.

The circumferential ring rotates from the initial position shown in FIG. 3 in the exemplary embodiment shown there by exactly 315 °. Thereafter, as can be seen in FIG. 4, this first positioning finger 41 lies exactly below the magazine finger 11, the second positioning finger 44 is located exactly below the magazine finger 14 and the third positioning finger 43 is located exactly below the magazine finger 13. Since the wire is always It hangs over the first positioning finger 41, thus ensuring that the wire is exactly in the position shown in FIG. 1A after this rotation by 315 °.

As soon as the positioning has been carried out, the full drum to the left in FIGS. 1 to 4 is removed from the winding device, for which purpose an automatic conveying device is usually provided. A new drum is inserted into the winding device and positioned under the winding core 2. As soon as the barrel is positioned, the motor 35 receives a further control signal and now rotates in the opposite direction, so that the rotating ring rotates counterclockwise in the illustration according to FIGS. 3 and 4. As soon as the positioning fingers reach the end of the link guide in area 47b, they are removed from the winding core by the link guide and finally return to their starting position. The wire now hangs from the same magazine finger from which it hung before actuating the wire positioning device. However, it can no longer hang over the barrel core or form knots. The magazine fingers are now opened and the accumulated wire windings can fall into the empty barrel without disability.

In the exemplary embodiment described above, a total of four magazine fingers and three positioning fingers are used. The number of magazine fingers and the positioning fingers can deviate from these numbers. It is crucial that the link guide 47 is designed so that the feed movement of the positioning fingers to the winding core only takes place when this positioning finger has passed the magazine finger in the rotational movement, the position of which is optimal for the barrel changing process. It is also important that the rotary movement is continued until the first positioning finger, which comes into contact with the winding core 2, comes under this magazine finger 11 with the preferred position.

In the exemplary embodiment, four magazine fingers are used, each of which has a winding spacing of 90 ° to one another, and three positioning fingers, which likewise have an angular spacing of 90 ° to one another. The starting position of the positioning device is such that the first positioning finger 41 is at an angular distance of 45 ° from the magazine finger 11 with the preferred position. Since the angular distance between this magazine finger 11 with the preferred position and the positioning finger 41 is 45 °, a rotation of 315 ° must be carried out in order to rotate this first positioning finger 41 under this magazine finger 11.

It should be noted that a different number of positioning fingers can also be used and that the size of the angular rotation can also be different. It is essential that the positioning finger only after the magazine finger with the preferred position reaches the winding core and is then rotated until it comes to rest under it.

Claims (6)

1. Drum pack device for winding continuous material, particularly wire, surface-coated wire, insulated wire and such like, having
   an essentially cylindrical, perpendicular winding core (2),
   a laying device, which feeds wire loops onto this winding core, the winding core being formed in such a way that the bottom wire loops fall onto a winding drum (4) arranged under the winding core, as soon as the number of wire loops fed on the winding core exceeds a pre-determined number,
   a gripping device, which has at least three holding fingers (11, 12, 13, 14) distributed around the circumference of the winding core, which are moveable relative to the winding core in such a way that during the changing of the winding drum they hold the wire loops on the winding core,
   characterised
   in that a wire positioning device is provided, which comprises a rotatable ring (30) arranged concentric to the winding core and a number of positioning fingers (41, 43, 44) arranged at an angular distance from each other and movably guided on this ring,
   in that a driving device (32, 33, 35) controlled by a control device is provided, by means of which the rotating ring is rotatable from an initial position, which the ring occupies before the drum change, to a change position, which the ring occupies during the drum change,
   in that a guiding device (47) is provided, through which the positioning fingers are guided, the guiding device being formed in such a way that the positioning fingers are led across from a first position, in which they are held at a distance from the winding core, to a second position, in which they rest against the winding core, this movement of the positioning fingers resulting in that, when the positioning fingers have passed a first holding finger (11) during the rotation from the initial position to another position, their position is particularly favourable for the drum change, and
   in that the control device is formed in such a way that the rotation of the rotating ring (30) is concluded when the first positioning finger (41), which reaches the position resting on the winding core (2), is situated vertically under the first holding finger (11), and
   in that, after the drum change, the driving device (32, 33, 35) turns the rotating ring (30) back from this change position to the initial position.
2. Device according to claim 1, characterised in that the number of positioning fingers (41, 43, 44) is the same as the number of holding fingers (11, 12, 13, 14) reduced by 1 and in that the angular distance of the positioning fingers corresponds to the angular distance of the holding fingers, no positioning finger being located under the second holding finger (12), lying behind the first holding finger (11), in the rotational direction during the movement from the initial position to the change position, when the rotating ring is located in its change position.
3. Device according to at least one of claims 1 to 2, characterised in that the holding fingers and/or the positioning fingers are essentially formed as cylindrical rods, whose (imaginary) cylinder axis runs through the (imaginary) cylinder axis of the winding core.
4. Device according to at least one of claims 1 to 3, characterised in that the guiding device is formed as a connecting link guide (47), and that each positioning finger has at least one roller (46), with which it supports itself on this connecting link guide (47).
5. Device according to at least one of claims 1 to 4, characterised in that the rotating ring (30) is essentially cylindrical and is formed with its outer circumference as a pulley, which receives a belt (32) which is connected to the driving device (35).
6. Procedure for the positioning of wire during the drum change in a drum pack device, which has an essentially cylindrical perpendicular winding core (2), onto which wire loops are collected during the changing process, which are held by three or more holding fingers (11, 12, 13, 14) distributed around the circumference of the winding core (2), the winding core being formed in such a way that the bottom wire loops fall onto a winding drum (4) arranged under the winding core, as soon as the number of wire loops fed onto the winding core exceeds a pre-determined number,
   characterised in that a wire positioning device is provided, by which the wire wound onto the winding core, which is connected with the wire on the full drum, is held in a position under a first holding finger (11), which, during the drum change, has the shortest distance from the full drum (4) which has been removed from the drum pack device, the wire positioning device having a number of positioning fingers (41, 43, 44), which are guided on a rotatable ring (30) arranged concentric to the winding core, and the guiding of these positioning fingers is carried out in such a way that during the rotation of this ring the positioning fingers rest on the winding core as soon as the positioning fingers have passed this first holding finger (11), and that the rotation of the ring is concluded as soon as the first positioning finger (41), resting on the winding core during the rotation, is located in an essentially angular position, which corresponds to the angular position of this first holding finger (11).

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