EP0014193B1 - Wire spooling apparatus - Google Patents

Description

The invention relates to a winding device for wire, in particular for drawn automatic welding wire with more than two coils arranged side by side on a drive shaft and with a wire guide device which can be displaced parallel to the coil axis and through which the wire to be wound can be moved back and forth in the area of a coil and then by one Coil is moved to the neighboring coil, a measuring device for the amount of wire to be wound is provided in order to reduce the coil drive when the desired amount is reached and to start a servomotor for the step feed of the guide device.

It is known to arrange a winding device as the last station of a wire drawing system, the continuously drawn wire running directly from the last drawing drum into the winding device. Small coils, such as sales coils, are provided as wire coils, each of which can only take up a small amount of the drawn material, but have the advantage over large machine coils, which can hold between 300 and 100 kg, that you can do your own rewinding from the machine large coils to sales coils saved. At high processing speeds or with a low capacity of a wire or sales spool, it is fully wound in a few minutes and must then be replaced immediately with an empty one in a winding device of the known type with only two coaxially arranged wire spools. This disadvantage also occurs when rewinding the wire from large machine spools to sales spools. It is therefore necessary to use your own operator when winding smaller spools, such as sales spools. Although this can basically operate several winding machines, operating multiple machines requires very quick work, since the storage capacity of the last drawing drum is limited and it can happen that two or more bobbins become full at the same time.

From DE-A-22 57 944 an automatic winding device is known which has the features mentioned above, but in which a measuring and programming device which is completely different from the subject of the application is used and the back and forth movement of the thread guide is realized via couplings whose heavy parts are driven in opposite directions. The measuring device does not measure the length of the thread directly but the number of control commands for the clutches that act on an electronic control unit.

Of the multitude of known winding devices, the two US-A-2460723 and 3 145 139 should also be mentioned, which, like the aforementioned German patent application, are not concerned with the unwinding of wire but with fishing lines, but each with one of the running line driven. a length counter having a measuring roller is provided in order to start the lateral displacement of the package of coils or the step feed from coil to coil after a certain winding length.

The object of the invention is to trigger a length measuring device designed as a measuring roller, both a reduction in the spool speed and the control of the servomotor in a suitable time slot sequence in a simple manner.

This object is achieved in that a measuring roller driven by the wire is used as the measuring device, which acts on two different meter counters that can be preset on different wire quantities, the first of which causes the coil speed to be reduced and the second one to control the servomotor.

A particular advantage arises when the winding device according to the invention is used for direct winding of wire running out of the wire production, since namely the operation can be carried out by the wire puller and no operator is required.

When a presettable value for the wire quantity is reached, the speed of the shaft pivoted into the winding position can be automatically reduced, whereupon the servomotor, likewise automatically, initiates a feed step of the guide device and then the speed of the shaft is increased again to the original speed. The purpose of this is to prevent the formation of loops or loops of the wire conveyed to the winding device at high speed when the winding sidewalls jump over when the guide device is fed from an already full to an empty wire spool. The extent of the speed reduction of the shaft is primarily dependent on the wire material, the wire diameter and the drawing speed of the wire.

In a further embodiment of the invention, in order to limit the step feed of the guide device, a proximity switch and sheet metal disks cooperating therewith, each inserted between adjacent wire coils, are provided.

It is advantageous if the sheet metal disks are provided in a manner known per se with driver lugs for securely catching and holding the wire when it is being passed onto the spool core of an adjacent empty spool.

A preferred embodiment of the winding device according to the invention is characterized in that two drive shafts are provided which are arranged eccentrically with one end on a disc rotatable about a horizontal axis and with cantilever at its other end and that the freely cantilevered end of the shaft brought into the winding position in each case can be supported by means of a quill which can be cantilevered with the cantilevered end of the shaft.

The invention is explained below with reference to an embodiment shown schematically in the drawing. 1 shows a plan view of the winding device, FIG. 2 shows a side view with a pulling station arranged in front of the winding device, and FIG. 3 shows a detail of FIG. 1 on an enlarged scale. Fig. 4 also shows a sheet metal disc arranged between the coils on a larger scale.

On a vertical column 1 of a machine frame 2, a vertically arranged disc 3 is rotatably mounted about a horizontal axis 4, a motor 5 serving for rotation. At right angles to the plane of the disc 3, d. H. parallel to the horizontal axis 4 of the disk, two diametrically opposed shafts 7, 8, which are arranged at a distance 6 from an axis 4 of the disk, are rotatably mounted on the disk. These shafts serve to receive wire spools 9 made of plastic. The wire spools are arranged on each of the shafts 7, 8 in a rotationally fixed but axially displaceable manner. The ends 10 of the two shafts 7, 8 project freely.

Opposite the column 1 carrying the disk 3, a column 12 carrying an axially displaceable quill 11 is arranged on the machine frame 2. The sleeve 11 can be brought into engagement with the freely projecting end 10 of each of the shafts 7, 8 by means of a compressed air drive 13. This one shaft, which is designated by 7 in FIG. 1, is connected at its other end 14 by means of a coupling 15 to a shaft rotary drive 16, i. H. connectable to a pulley 18 driven by an electric motor 17. By rotating the disk 3, one shaft 7 can be connected to the shaft rotary drive 16 and the other shaft 8 once. The shaft 7 coupled to the shaft rotary drive 16 is in the winding position, while the other shaft 8 is in the rest position . Arranged approximately parallel to the shaft 7 brought into the winding position is a spindle 20 which can be rotated by a servomotor 19 and which serves for the gradual displacement of a guide device - which is designated overall by 21 - for the wire 22. The guide device comprises a primary slide 23 which is mounted on guides 24. On the primary slide 23, a tension nut 25, which is penetrated by the spindle, is also arranged. Further guides 26 for a secondary slide 27 are arranged on the primary slide 23 and extend parallel to the guides 24 of the primary slide 23. The secondary carriage 27 has projecting arms 28 which carry a wire guide wheel and two roller-shaped wire guide finders 30, between which the wire 22 to be wound comes to rest. The wire guide fingers 30 lie directly in front of the coils 9 of the shaft 7 pivoted into the winding position. The secondary slide 27 can be set into an oscillating movement by means of a hydraulic cylinder 31, the stroke of the oscillating movement corresponding approximately to the length 32 of a wire coil 9. The wire guide roller 29 drives via a belt drive 33 two meter counters 34, 35, one of which 34 is coupled with a speed control device (not shown) for the shaft rotary drive 16 and the other 35 is coupled to the servomotor 19 for advancing the guide device 21 via electrical contactors, whereby the contactors function when values that can be preset on the meter counters are reached. A cantilever arm 36 is attached to the primary slide 23 and extends close to the wire spools 9 of the shaft 7 pivoted in the winding position, at the end of which a proximity switch 37 responsive to metal is mounted.

As can be seen from FIG. 2, the winding device is arranged directly after the last drawing station 38 of the production system. After the last drawing die 39, the wire 22 is fed via a drawing drum 40 to a non-driven storage drum 41, which can be braked by means of a shoe brake 42. The wire 22 runs from the storage drum 41 via the wire guide roller 29 and the wire guide fingers 30 to the shaft 7 pivoted in the winding position.

• Zunächst wird der Drahtanfang an der ersten, d. h. unmittelbar an der neben der Scheibe 3 angeordneten Drahtspule 9 der in Spulstellung geschwenkten Welle 7 befestigt. Sodann wird mit dem Ziehvorgang und dem Aufspulen des Drahtes begonnen und die Ziehgeschwindigkeit und damit auch die Spulgeschwindigkeit (Umdrehungszahl der Welle 7) auf den maximal erreichbaren Wert gesteigert. Gleichzeitig mit dem Rotieren der Welle 7 beginnt auch die oszillierende Bewegung des Sekundärschlittens 27 entlang der Führungen 26, wodurch der Draht 22 etwa gleichmäßig über die. Länge 32 der Drahtspule 9 verteilt aufgespult wird. Die Koppelung der Meterzähler 34, 35 mit der Drehzahlregeleinrichtung für den Wellen-Drehantrieb 16 bzw. mit dem Stellmotor 19 zum schrittweisen Vorschub der Führungseinrichtung 21 von Drahtspule 9 zu Drahtspule 9 ist in der Weise verwirklicht, daß bei Erreichen eines voreinstellbaren Wertes - der etwa 2 % geringer als die je Drahtspule aufzuspulende Drahtmenge gewählt ist - des ersten Meterzählers 34 die Drehzahl der Welle automatisch verringerbar ist und daß bei Erreichen eines voreingestellten Wertes des zweiten Meterzählers 35, welcher Wert der aufzuspulenden Drahtmenge je Drahtspule entsprechend gewählt ist, der Stellmotor 19 der Führungseinrichtung 21 automatisch zu einem Vorschubschritt veranlaßt wird. Dieser Vorschubschritt wird durch den Annäherungsschalter 37 beendet, u. zw. dann, wenn der Annäherungsschalter 37 sich bis zu einer zwischen zwei benachbarten Drahtspulen 9 vorgesehenen Blechscheibe 43 vorwärtsbewegt hat.

The function of the facility is as follows:

• First of all, the beginning of the wire is fastened to the first, that is to say directly to, the wire spool 9 arranged next to the disk 3 of the shaft 7 pivoted in the winding position. Then the drawing process and the winding of the wire are started and the drawing speed and thus also the winding speed (number of revolutions of shaft 7) is increased to the maximum achievable value. Simultaneously with the rotation of the shaft 7, the oscillating movement of the secondary slide 27 along the guides 26 also begins, as a result of which the wire 22 is approximately uniformly over the. Length 32 of the wire spool 9 is wound up distributed. The coupling of the meter counters 34, 35 with the speed control device for the shaft rotary drive 16 or with the servomotor 19 for the stepwise advancement of the guide device 21 from the wire coil 9 to the wire coil 9 is realized in such a way that when a presettable value is reached - the approximately 2nd % less than the amount of wire to be wound per wire spool is selected - the first meter counter 34, the speed of the shaft can be automatically reduced and that when a preset value of the second meter counter 35 is reached, which value of the amount of wire to be spooled per wire spool is selected accordingly, the servomotor 19 of the guide device 21 is automatically caused to a feed step. This feed step is ended by the proximity switch 37, u. between when the proximity switch 37 has moved forward to a sheet-metal disk 43 provided between two adjacent wire coils 9.

While this feed step is being carried out, the wire 22 lies over the edges of the disks 45 delimiting the wire spools and is caught by one of the driver lugs 46, which are provided on each sheet metal disk 43 and which protrude radially beyond the edges 44 of the wire reel disks 45, and from slipping prevented. Following this switching step, the counters of the meter counters 34, 35 are automatically reset to zero and the speed of the shaft 7 is automatically increased again to the maximum achievable.

Reducing the winding speed when feeding the guide device 21 is necessary in the case of rapid winding in order to avoid loop formation when the wire jumps over the edges 44 of the wire spool disks 45 with a change in diameter - from the large diameter of the full spool to the small diameter of the empty spool. In addition, the storage drum 41 is braked by the shoe brake 42 during the speed reduction of the shaft 7 in order to keep the wire 22 in tension.

During this feed step of the guide device 21, the drawing process continues at an undiminished speed. The wire is therefore stored on the storage drum 41. Contact fingers 47, which sense the amount of wire stored on the storage drum due to the height 48 of the wire turns wound on the storage drum due to the height 48 of the wire turns on the storage drum 41, control the maximum winding speed.

After the last of the wire spools 9 on the shaft 7 pivoted in the winding position is filled, the winding device is stopped, the wire 22 is pinched off and the disk 3 is pivoted through 180 degrees after the sleeve 11 has been withdrawn and the clutch 15 released, so that in the meantime the empty wire spools 9 provided shaft 8 reaches the winding position. After the guide device 21 has been moved back into the starting position (near the disk 3), the wire is fastened again to the first wire spool 9, the sleeve 11 is brought into engagement with the shaft 8 and the clutch 15 is engaged. During this process, the drawing process also continues at an undiminished speed; the wire is taken up by the storage drum 41. Subsequently, the filled wire spools 9 located on the shaft 7, which is now pivoted into the rest position, are removed after the wire has been pinched through between the spools, and empty wire spools 9 are pushed onto the shaft with the sheet metal disks 43 interposed.

More than two shafts can be provided and the shafts can also be arranged on swivel arms instead of on the disk 3; the waves can also be pivoted about a vertical axis. Likewise, the sleeve 11 at the freely projecting end of the shaft pivoted into the winding position is not absolutely necessary; it can be omitted in the case of particularly small wire coils 9.

By using the winding device directly after the wire production system, there is no need to rewind from a large machine spool to the small sales spools, which saves considerable manufacturing costs. The winding device can be operated by the wire puller, who primarily only has to carry out monitoring work on the wire drawing system. His work on the winding device essentially involves placing empty bobbins, removing and possibly packing the full bobbins and placing them on a pallet. The time intervals after which this work is to be carried out depend primarily (in addition to the drawing speed) on the number of wire spools 9 arranged on the shafts 7, 8, that is to say on the length of the shafts 7, 8. For winding automatic welding wire it has proven advantageous in practice to dimension the length of the shafts so that each shaft can hold about eight to twelve sales wire spools.

As described, the advantages of the winding device are particularly effective in direct winding away from the wire production system. However, the winding device can also be used for rewinding, since there are advantages due to the longer operating cycle times, particularly when operating multiple machines.

Claims (4)

1. A winding device for wire, in particular for drawn automatic welding wire, with more than two spools disposed coaxially adjacent one another on a drive shaft and with a wire guide device which is disposed so as to be displaceable parallel to the spool axis and by means of which the wire to be wound is moved backwards and forwards in each case in the region of one spool and then from one spool to the adjacent spool, a measuring device being provided for the amount of the wire to be wound so as to reduce the spool drive when the desired amount has been reached and to actuate adjusting motor for the step advance of the guide device, characterized in that a measuring reel (33) driven by the wire is used as the measuring device and acts on two different meter counters which are pre-adjustable to different amounts of wire, the first (34) of which meter counters reduces the spool rotational speed and the second (35) of which controls the adjusting motor (19).

2. A winding device according to claim 1, characterized in that there are provided a proximity switch (37) and, cooperating with the latter, sheet metal discs (43), which are inserted in each case between adjacent wire spools (9), for ending the step advance effected by the adjusting motor (19).

3. A winding device according to claim 2, characterized in that the sheet metal discs (43) are provided in a manner known per se with entrainment projections (46) for reliably catching and holding the wire when it is being transferred to the spool core of an adjacent empty spool (9).

4. A winding device according to claims 1 to 3, characterized in that two drive shafts (7, 8) are provided, which with one end (14) are eccentrically disposed rotatably on a disc (3) which is rotatable about a horizontal axis (4) and with their other end (10) project freely, and in that the freely projecting end (10) of the shaft (7), brought in each case into the winding position. can be supported by means of a spindle sleeve (11) which can be brought into and out of engagement with this freely projecting end (10) of the shaft (7).

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