DE1231657B - Device for reshaping a tightly wound band bundle formed in particular from thin steel strip, for example coming from a cold rolling mill, into an open bundle with spaced turns - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

B 21c

German KL: 7 b -5/60

Number: 1231657

File number: Sch 36485 I b / 7 b

Filing date: July 25, 1961

Opened on: January 5, 1967

The invention relates to a device for forming a particularly thin Steel band formed, for example coming from a cold rolling mill, firmly wound band collar into an open covenant with distanced turns, in which a pierced by a centrally arranged mandrel and nested like a focal point rotatable rings formed support surface and a support surface spanning with a clamping device provided for holding the outer end of the tape cylindrical outer jacket is provided and in the winding by winding of the tightly wound by turning the dome and / or the outer jacket Bund is lifted off and moved outwards against the clamping ring.

The products coming from a cold rolling mill are usually placed in a protective gas atmosphere annealed. Sheet metal strips that require a longer stay under the annealing temperature are mostly in the rolled-up state, i.e. as a whole bundle, annealed. It is now known that the Annealing in a protective gas atmosphere creates a loosely layered layer of the material to be annealed to create a better one Purging the annealing stack with the protective gas and thus better removal of impurities, leads to faster heating and more even structure formation. Now that the Cold rolling mill coils coming from the cold rolling mill are usually wound very tightly and tightly, one is today in many cases endeavors, in order to achieve a loose layering, the tightly wound band bundles by wrapping to open, d. H. to reshape in such a way that there are gaps between the individual windings, through which the protective gas is passed during the annealing process.

In known rewinding devices for thin metal strips in particular, in which a taut If a wound bundle is unwound and a bundle with loose layers is wound up, the procedure is as follows: that while maintaining the same winding direction as well as with approximate preservation of the outer The winding process at the inner collar end while reducing the inner collar diameter is continued. Surface damage from scratching as a result of grinding against one another the individual turns are unavoidable.

In another known wrapping device, a wire or thread is also wrapped in the newly created winding collar when wrapping, which later, after the wrapping is finished, again device for forming a particularly thin steel strip, for example coming from a cold rolling mill,
tightly wound ribbon in an open
Waistband with distanced turns

Applicant:

Schloemann Aktiengesellschaft,

Düsseldorf, Steinstr. 13th

Named as inventor:
Richard Rahn, Osterath (Ndrh.)

is pulled up out of the collar. The device required for this consists of two

ao standing winding drums for unwinding or winding up the tape and one from the tape partially wrapped conveyor drum. A separate controllable drive is necessary for each of the three drums, and also a complicated and expensive electrical control and synchronization device for the coordination of the three drives necessary for the belt run regulation. A Another disadvantage of this known device is that the thread to be wound, usually nylon thread, Must have a certain minimum thickness to withstand the stresses occurring when pulling out the To be able to resist thread. This is particularly useful when wrapping thin ribbons extremely large collar diameter. Other metal spacers, for example thin strips of corrugated iron or coiled wires that can remain in the bundle during the annealing process was not able to establish itself particularly well, since this is the passage of the protective gas during the annealing process hinder and also no longer at the points shielded against the flow of inert gas cause removable stains on the belt surface. If these spots are on the edge of the tape, you can remove them by later trimming the tape, but what an additional one Requires operation and leads to significant material losses. Also have the metal ones Spacers themselves only have a relatively short service life of about 5 to 7 anneals.

So-called reel-less winding machines are also used for winding thick and brittle metal strips known, in which the tape through a

609 750/163

Bending roller set is bent so that it becomes a. According to the invention this is achieved in that

Spiral rolls up. Such a wound collar is one of the devices known per se usually very loosely and may have airtight gaps between the top and the top end of the band between the individual turns. A thin-covering cover plate is provided. Through this inner ligaments can but not after this procedure 5 can the air that migrates from the outward be wound, since the steepness of the bending is displaced, do not deform outwards escaping tape is not enough to chen and lies like a pillow or cushion between To continue turning band rings that have become heavier. the previous turn already formed and the

Finally, a rewinder is known to create a newly forming turn. At the same time, the band iron rings of a given io but also no air can enter the inside diameter of the collar from outside to a larger diameter, as a result of which the one behind the wandering one is formed. With this device, the suction resulting from the winding is increased. Naturally shaping band ring with one of its end faces up must be driven in terms of drive for a sufficiently high around a fixed table, whereby the outer band winding speed must be taken care of,
end to the inner circumferential surface of a tension ring encompassing the band ring 15. According to a further feature of the invention, the clamping ring is attached and the latter is set in rotation in an advantageous manner in which the rotational speed of the dome is set in rotation against the winding direction of the band ring and / or the outer jacket synchronously holding drive provided in order to keep the resulting distances between the individual turns of the band ring the same size from the outside between the turns,
advancing inwards, migrating outwards and applying to the rotating clamping ring. In a device according to the invention, another device of the same principle is shown schematically in the drawings. In detail shows
better centering of the band ring a the support F i g. 1 is a sectional side view of the front surface centrally penetrating mandrel provided, direction,
or there are a number of concentric rows. 2 is a plan view.

orderly bars attached to the support surface and on a round base plate 1 are a larger

Instead of the outer jacket, the mandrel with the cup ring 2 and a smaller ring 3 is arranged, set band ring is set in rotation. While the plate ring 2 is rotatably mounted, the support surface is divided into an inner disc and an inner ring 3 in a fixed, non-rotatable manner on the outer ring, the inner disc 30 being fastened to the base plate 1. The plate ring 2 rotates together with the mandrel. Of course circumference could be increased through step-like and has a one and the mandrel with the mounted fixed ring encircling elevated approach 2 a and a collar wrapped simultaneously with the outer clamping these still outstanding collar 2 on. Let the plate ring rotate in opposite directions. ring 2 carries several different sized individual

When wrapping with such a device 35 rings 4, 5, 6 and 7, which are farther-like one inside the other, which are usually arranged lying in a tightly wound, and the tension existing independently of the band collar can be reduced considerably from one another on the plate ring 2 slidingly, that is, it can let it loose. The upper edges of these rings close coils and soft cuffs are made. It was now digged together, so that a flat support surface was found that is formed when wrapping around 40 in particular for receiving the band collar 8. In the special thin bands the Umwickelgeschwindig- center of the device is a serve as an axis strong influence on the strength of the new vertical core or mandrel 9 is provided, which has formed with the federal government, in such a way that a clamping device 10 for the interior Tape end high wrapping speed (high speed of the winding collar is equipped. The plate ring 2 of the dome and / or the outer jacket) more loosely 45 also carries a cylindrical outer jacket 12 that is held at higher speed by the collar 2 δ than with lower wrapping gens. In tests and measurements, it was established that this is caused by air congestion, in which the entire upper end face becomes the cover plate 14 in the form of pressure and cover plate 14 in the form of pressure and covering with increasing wrapping speed of the winding collar 8, 8 a Suction forces to which 50 can be held in a height-adjustable manner. Of course, outwardly migrating turns can have an effect. also on the mandrel 9 means for holding the cover

The invention, on which the object is based, plate 14 are provided.

open collars with as similar and regular as possible The operation of the device according to the invention

The following is to be established with moderate distances between the windings: After the tape to be opened has been placed now accesses the last described 55 bund 8 while clamping the inner end of the tape Devices back, as these in their structure very much by means of the clamping device 10 on the device are simple, space-saving and, in particular, have been applied, the cylindrical outside in With regard to surface damage to the jacket 12 placed and the outer end of the tape is Work very safely with the tape, otherwise loosening it until this is a sufficiently large one Establish an open covenant usual from and 60 circle describes and means of a not drawn There is no need to rewind the tape. To now the clamping device on the inner wall of the outside desired The formation of a spacing between the individual jacket 12 can be attached. Then the To achieve turns, means should be provided cover plate 14 and placed in such a way by means of due to the effect of the clamping devices in the guide slots in the Umbiger wrap at high winding speed result- 65 13 found that they sod the face of the federal government 8 Air congestion is amplified in such a way that it just touches. The rotary drive 11 is now a formation of the larger diameter federal switched on, which is designed so that the plate ring 2 the windings are prevented from being laid next to one another. and thus also the outer jacket 12 with high rotational

speed in the direction of arrow 15 rotates.
In the process, the beginning of the tape attached to the outer jacket 12 is taken along, as a result of which the tape section leading to the fixed collar with a steep spiral pitch
in the sense of an unwinding movement outwards in
Direction towards the outer end of the tape or towards the
Outer jacket 12 is moved, each one
corresponding new winding section lifts off the tightly wound collar. Because of the high
Rotational speed move the outwardly speaking additives of other gases at the same time a wandering turns very quickly, so that the belt is cleaned of grease or oil residues

times 0.5 mm tape thickness can be used. A tool to open bundles made of thicker ribbons can or in order to achieve a larger distance between the individual turns, consists in 5 that the device is filled with a heavier medium than air. The one wandering outwards As a result, turns are opposed to a greater weight. Such a heavy medium could be be carbonic acid, for example, whereby

the air displaced by the running off coil forms a kind of stagnant wave, while at the same time a suction is created behind the winding. Since now through the cover of the upper face of the federal government no air can escape to the outside nor outside air can enter the changing room and the air balance The pressure and suction forces that occur are subject to a certain inertia in the changing room itself strong enough to prevent the respective outwardly moving coil section from touching with the previously formed turn. The winding section that has come to a standstill once then no longer experiences any shift.

In order to avoid grinding of the lower band edge on the support surface as much as possible during the winding process, the support surface is divided into several individual rings 4, 5, 6 and 7. The individual rings loaded by the stationary collar 8, for example the rings 6 and 7, are held in place by the weight on them, so that when the cup ring 2 is driven, it rotates away from under the rings 6, 7. In the course of the winding process, turn by turn is released from the stationary winding collar and moved radially outward, so that one ring after the other is relieved. The relieved rings 4, 5 and 6 are then carried along by the rotating cup ring. The already loosened turns 8 a, which are rotating together with the outer jacket 12, thereby receive a supporting surface which rotates with it and which is stationary in relation to its rotational movement.

In order to achieve the highest possible wrapping speed during the wrapping process, it is of course easily possible, not only the outer jacket 12, but also the mandrel 9 with the to let the tightly wound band collar 8 rotate in opposite directions. However, care must be taken with the device be that the driven parts - outer jacket 12 and / or mandrel 8 - as synchronous as possible Preserve the rotation speed so that it is perfectly even in the open collar Create spaces between the turns. By changing the winding speed, the Twist spacing can be changed slightly.

The device, which is also suitable for wrapping non-metallic tapes, is only can be achieved. Of course, the device must then be gas-tight in accordance with the protective regulations be trained.

Claims (4)

Patent claims: 1. Device for reshaping a tightly wound band bundle formed in particular from thin steel strip, for example coming from a cold rolling mill, into an open bundle with distanced windings, in which a support surface pierced by a centrally arranged mandrel and formed from focal point-like interlocking rotatable rings for the frontal placement of the bundle as well as a cylindrical outer jacket that spans the support surface and is provided with a clamping device for holding the outer tape end and is lifted from the tightly wound collar by turning the dome and / or the outer jacket turn by turn and moved outwards against the clamping ring, characterized in that that an airtight cover plate (14) is provided which covers the upper end face of the winding collar (8, 8 d). 2. Apparatus according to claim 1, characterized in that the cover plate (14) on the The mandrel (9) and / or the outer jacket (12) can be held in a height-adjustable manner. 3. Device according to claims 1 and 2, characterized by the wrapping speed synchronous drive. 4. Device according to claims 1 to 3, characterized in that the device is gas-tight and that the wrapping process takes place under a medium that is heavier than air and is preferably used to clean the belt at the same time. For thin and slightly flexible tapes up to a maximum of 60 1 831 526, 1 660 051. Considered publications:
German patent specifications No. 966 939, 903 679,
206; Austrian Patent No. 71 576;
French patents No. 1 246 616, 224 428 1197 727 "
U.S. Patents Nos. 2,860,874, 2,848,227, 847 212, 2 479 809, 2 366 352, 2 199 412, 1 sheet of drawings