EP3725715A1 - Winding station and method for winding a plurality of metal strips into a plurality of tape spools - Google Patents

Abstract

Winding station (1.1, 1.2) for winding a plurality of metal strips (2.1, 2.2) into a plurality of tape reels (3.1, 3.2), at least comprising: - a frame (4), - a carrier (5) for receiving a plurality of winding tubes (6), wherein the carrier (5) is attached to the frame (4), and - a plurality of drives (7), by means of which at least two winding tubes (6) of the plurality of winding tubes (6) can be driven separately a method for winding a plurality of metal strips (2.1, 2.2) into a plurality of tape rolls (3.1, 3.2) and the use of a plurality of ring-shaped drives (7) for separately driving a plurality of winding tubes (6) at a winding station (1.1, 1.2) suggested.

Description

The present invention relates to a winding station and a method for winding a plurality of metal strips to form a plurality of tape rolls and the use of special drives for winding stations. Such winding stations are used in particular in combination with cutting machines, for example in the manner of tape cutting machines or foil cutting machines, by means of which a metal tape or a metal foil can be cut primarily in a longitudinal direction of the metal tape or the metal foil, so that a plurality of the metal tape or the metal foil is formed by metal strips.

Corresponding winding stations are for example from the EP 2 752 381 A1 known and regularly have a winding shaft which is rotatably attached to a frame. For each metal strip, a winding tube is stretched on the winding shaft, onto which the metal strips can be wound to form parallel rolls of tape. For this purpose, all winding tubes can be rotated jointly via the rotatable winding shaft, which can be driven with a drive at at least one of its longitudinal ends. The at least one drive of the winding shaft also has the task of ensuring a torque dependent on a diameter of the wound tape rolls for generating a constant tape tension or a constant web tension in the individual metal strips during winding. When cutting the metal strip or the metal foil at a cutting station upstream of the winding station, however, different cutting forces can arise on individual cutting knife pairs arranged parallel to one another in the cutting station, which together with cutting edge deformations and / or flatness errors of the metal strip or the metal foil to be cut, in turn, have different diameters of the individual tape rolls. This has the consequence that the torque generated by the at least one drive is transmitted to the individual Tape rolls lead to different tape tensions or different web tensions.

In addition, undesirable shape tolerances and out-of-roundness of the tape rolls can occur. To compensate for the different belt tension or web tensions of the individual metal strips and thus to improve the shape tolerances, contact roller units have already been successfully used, which for example can have a separate roller body for each metal strip, so that an individual setting of the contact force with which the respective roller body is applied the assigned tape roll is applied, is made possible. However, there is a desire to further improve the uniformity of the individual wound rolls of tape.

The object of the invention is therefore to at least partially solve the problems described with reference to the prior art and in particular to provide a winding station for winding a plurality of metal strips into a plurality of tape rolls, with which tape rolls can be produced with greater uniformity. In addition, a method is to be specified for winding a plurality of metal strips to form a plurality of tape rolls, with which tape rolls can be produced with greater uniformity. In addition, a use of ring-shaped drives is to be specified, by means of which tape rolls can be produced with greater uniformity.

These objects are achieved with a winding station, a method and a use according to the features of the independent patent claims. Further advantageous refinements of the invention are specified in the dependent claims. It should be pointed out that the features listed individually in the patent claims can be combined with one another in any technologically sensible manner and define further embodiments of the invention. Furthermore the features specified in the claims are specified and explained in more detail in the description, with further preferred embodiments of the invention being presented.

• ein Gestell,
• einen Träger zum Tragen einer Mehrzahl von Wickelhülsen, wobei der Träger an dem Gestell befestigt ist, und
• eine Mehrzahl von Antrieben, mittels denen zumindest zwei der Wickelhülsen der Mehrzahl von Wickelhülsen separat antreibbar sind.

A winding station for winding a plurality of metal strips to a plurality of tape rolls, which has at least the following components, contributes to this:

• a frame,
• a carrier for carrying a plurality of winding tubes, the carrier being attached to the frame, and
• a plurality of drives by means of which at least two of the winding tubes of the plurality of winding tubes can be driven separately.

The proposed winding station can be used in particular in connection with a cutting machine, for example in the manner of a tape cutting machine or film cutting machine. By means of such cutting machines, a metal strip or a metal foil can be cut in a longitudinal direction of the metal strip or the metal foil, so that a plurality of metal strips is formed from the metal strip or the metal foil. The metal strip or the metal foil and the individual metal strips are preferably made of aluminum, an aluminum alloy or a non-ferrous alloy. The metal strip is in particular aluminum strip, the metal foil is in particular aluminum foil and / or the plurality of metal strips is a plurality of aluminum strips. The metal strip or the metal foil has a metal strip width or a metal foil width of in particular 400 mm (millimeters) to 2,500 mm and / or a metal strip thickness or metal foil thickness of in particular 0.01 mm to 0.5 mm. The individual cut metal strips in particular have a strip width of 10 mm to 500 mm, preferably 10 mm to 250 mm and particularly preferably 10 mm to 50 mm, and / or a strip thickness from 0.01 mm to 0.5 mm. In a particular embodiment, the width of the strip is (approximately) 20 mm.

The metal strip or the metal foil is in particular unwound from a coil by means of an unwinding station and fed to a cutting station of the cutting machine. The cutting station cuts the metal band or the metal foil in the longitudinal direction of the metal band or the metal foil, so that a plurality of metal strips is formed from the metal band or the metal foil. Using the cutting station, for example, 2 to 100 parallel metal strips can be cut. The plurality of metal strips are then fed to at least one winding station, by means of which each metal strip is wound into a tape roll. In particular, a plurality of first metal strips can be fed to a first winding station and a plurality of second metal strips can be fed to a second winding station of the cutting machine. The first metal strips and second metal strips preferably run alternately parallel to one another before they are separated. In other words, this means that before the separation, a first metal strip and a second metal strip run alternately next to one another. By feeding the plurality of first metal strips to the first winding station and the plurality of second metal strips to the second winding station, a plurality of tape rolls arranged parallel to one another can be wound with the first winding station and the second winding station, the individual tape rolls being at a distance from one another when being wound . The distance corresponds in particular to the strip width of the metal strip which ran between the metal strips of adjacent tape rolls before the separation. However, the distance can also be larger or smaller. The distance between the individual tape rolls prevents the individual tape rolls from influencing each other during winding. For example, it can be prevented that the metal strips of adjacent tape rolls touch, overlap and / or deform one another during winding.

The winding station has a frame which in particular consists at least partially of metal. Furthermore, the frame can comprise metal profiles and / or metal plates. The frame is fixed or movable on a floor or, alternatively, fixed or movable on a machine frame of the cutting machine.

Furthermore, the winding station comprises a, in particular horizontally arranged, carrier for receiving a plurality of winding tubes, the carrier being fastened to the frame. The carrier is preferably also at least partially made of metal. The mounting of the carrier on the frame takes place in particular firmly so that the carrier is in particular not rotatable or rotatable relative to the frame. Furthermore, the carrier can be fastened to the frame in particular in a form-fitting manner, for example with screw connections, and / or materially, for example with welded connections. Furthermore, the carrier can also be attached to the frame with guides and / or (sliding) bearings. The carrier is attached to the frame in particular at its longitudinal ends. It is preferred that the carrier is releasably attached to the frame at at least one longitudinal end, so that the plurality of winding tubes can be plugged onto the carrier and / or the wound tape rolls can be removed from the carrier. The carrier can also at least partially have an annular, circular or polygonal cross section and / or have at least one cavity, for example in the manner of a (continuous) longitudinal bore. Furthermore, the carrier can, for example, be at least partially tubular and / or at least partially shaped like a profile carrier. In its longitudinal direction, the carrier preferably has a length of 500 mm to 2,700 mm and / or an external diameter of 50 mm to 500 mm.

The individual winding tubes of the plurality of winding tubes are also particularly tubular and / or consist at least partially of plastic or a metal, such as aluminum or steel. Furthermore, the individual winding tubes have, in particular, a winding tube width parallel to their longitudinal direction 10 mm to 500 mm, preferably 10 mm to 250 mm and particularly preferably 10 mm to 50 mm, a winding tube diameter of 70 mm to 600 mm, an inner diameter of 50 mm to 500 mm and / or a wall thickness of 1 mm to 30 mm . The inside diameter of the individual winding tubes of the plurality of winding tubes preferably corresponds (essentially) to the outside diameter of the carrier. The individual winding tubes of the plurality of winding tubes can be arranged next to one another on the carrier. For example, 2 to 50 winding tubes can be arranged next to one another on the carrier. On each winding tube of the plurality of winding tubes, a (single) metal strip can be wound into a roll of tape or a plurality of the metal strips can be wound up into a plurality of rolls of tape. After its completion, the tape roll can in particular have a tape roll diameter of 100 mm to 2,000 mm, preferably 160 mm to 1,800 mm.

The winding station comprises a plurality of drives which can be installed on the carrier, which is in particular horizontally arranged. At least two of the winding tubes of the plurality of winding tubes can be driven separately by means of the drives. This means that at least two winding tubes can be driven independently of one another, separately and / or individually, ie, for example, with their own torque and / or with their own speed, or can be rotated about an axis of rotation relative to the carrier. For this purpose, the winding station can comprise, for example, 2 to 50 drives. The individual winding tubes can be driven, in particular, at a speed of up to 1000 rpm (revolutions per minute), in particular 0 rpm to 600 rpm. Furthermore, the winding station can also be designed in such a way that an individual winding tube can be driven separately with each individual drive and / or that each of the winding tubes can be driven separately with at least one drive. This means that each winding tube can be driven separately or individually, that is to say for example with its own torque and / or with its own rotational speed, or can be rotated about an axis of rotation relative to the carrier. In particular with very narrowly cut tape rolls (e.g. with strip widths of less than 50 mm), however, there may also be the possibility exist that, for example due to structural conditions, a (single) winding tube for a plurality of tape rolls, for example two or three tape rolls, can be driven with a separate speed and / or a separate torque with at least one drive. Conversely, for example in the case of wide winding tubes (e.g. for winding tubes with a winding tube width of more than 50 mm), a (single) winding tube can be driven with a plurality of drives, for example two drives. In addition, it can also be provided that some of the winding tubes can be driven together with a drive. Furthermore, the winding station can have at least one control which, for example, comprises at least one microcontroller and / or a data memory, by means of which the drives can be controlled separately from one another or in groups. This means in particular that each drive or a plurality of drives, in particular as a function of the tape roll diameter of the respective tape roll or rolls, can be operated at different speeds and / or with different torques. The tape roll diameter of the individual tape rolls can be determined for this purpose, for example, by means of at least one sensor and / or a mathematical model. Each drive can also, for example, have a power of 1 kW (kilowatts) to 10 kW, preferably 3 kW to 5 kW and particularly preferably 4 kW. The drives are in particular electric motors, for example in the manner of so-called "rotary table" motors or spindle motors. Due to the separate or separate drive of the individual winding tubes, the individual drives can generate individual torques depending on the tape roll diameter of the individual tape rolls, so that a constant tape tension (in N) (Newtons)) or a constant (specific) web tension (in N / mm ² (Newtons per square millimeter)) can be generated in the individual metal strips. This allows tape rolls to be produced with greater uniformity.

Furthermore, the plurality of drives can be attached to the carrier. The fastening can take place frictionally, positively or with a material fit.

In addition, each drive of the plurality of drives can be designed in an annular manner. Each drive can have an inside diameter which essentially corresponds to the outside diameter of the carrier. Furthermore, each drive comprises in particular a radially inner (annular) stator and a radially outer (annular) rotor.

In addition, each drive of the plurality of drives can have a width which is at most twice as large as a strip width of an individual metal strip of the plurality of metal strips. With a strip width of z. B. 20 mm and a cutting width of z. B. 20 mm, each winding tube, for example, a winding tube width of 40 mm and each drive, for example, have a width of 40 mm.

Furthermore, the plurality of drives can have at least one connection line, the at least one connection line running at least partially through the carrier. Each drive preferably has at least one connection line. The at least one connection line is, in particular, a control line for transmitting control signals and / or a power line for transmitting electrical energy.

In addition, each winding tube of the plurality of winding tubes can be attached to a drive of the plurality of drives. In particular, each winding tube of the plurality of winding tubes can be attached to a single drive of the plurality of drives. The winding tubes are particularly attached to the (ring-shaped) rotor of the drive. The attachment can for example be frictionally and / or positively.

Furthermore, each winding tube of the plurality of winding tubes can be fastened to a drive of the plurality of drives with a separate clamping device. In particular, each winding tube of the plurality of winding tubes can be fastened to a single drive of the plurality of drives with a separate clamping device. The clamping device can be designed, for example, in the manner of at least one punch, which can in particular be adjusted to a limited extent in a radial direction. The at least one punch can, for example, be pretensioned by means of at least one spring and / or adjustable by means of at least one actuator.

According to a further aspect of the invention, a method for winding a plurality of metal strips into a plurality of tape rolls is also proposed, each metal strip of the plurality of metal strips being wound onto a winding tube of a plurality of winding tubes, the individual winding tubes of the plurality of winding tubes being wound next to one another a carrier of a winding station are arranged and wherein at least two winding tubes of the plurality of winding tubes are each driven separately with at least one drive.

For this purpose, the individual drives are controlled, in particular by at least one controller, in such a way that they generate a torque as a function of the tape roll diameter of the individual tape rolls, from which a (essentially) constant tape tension or ( essentially) constant web tension results. For this purpose, the tape roll diameter of the individual tape rolls can be measured continuously or discontinuously, in particular with at least one sensor, which is connected to the at least one controller, in particular in a data-conducting manner. Furthermore, the tape roll diameter of the individual tape rolls can also be determined by a mathematical model.

In addition, the drives can generate a constant, specific belt tension in the individual metal strips.

For the rest, reference is made to the description of the changing station. The method is carried out in particular with the winding station. The winding station can also have a controller that is set up and provided for carrying out the method.

According to yet another aspect of the invention, the use of a plurality of ring-shaped drives for separately driving a plurality of winding tubes at a winding station for winding a plurality of metal strips to form a plurality of tape rolls is also specified.

The plurality of ring-shaped drives and / or the plurality of winding tubes are arranged in particular on a common carrier of the winding station. As a result, the winding station can in particular be made particularly compact. The use of the ring-shaped drives also takes place in particular in such a way that a (substantially) constant tape tension or a (substantially) constant (specific) web tension is achieved in all metal strips during winding. For further details, reference is made to the description of the winding station and the method.

Fig. 1:

eine Schneidmaschine mit einer ersten Wickelstation und einer zweiten Wickelstation in einer Seitenansicht;

Fig. 2:

die erste Wickelstation in einer Frontansicht; und

Fig. 3:

eine Schnittdarstellung durch einen Träger der ersten Wickelstation.

The invention and the technical environment are explained in more detail below with reference to the figures. It should be pointed out that the figures show a particularly preferred embodiment variant of the invention, but this is not limited thereto. The same components are provided with the same reference symbols in the figures. It shows by way of example and schematically:

Fig. 1:

a cutting machine with a first winding station and a second winding station in a side view;

Fig. 2:

the first winding station in a front view; and

Fig. 3:

a sectional view through a carrier of the first winding station.

The Fig. 1 shows a schematic representation of a cutting machine 19, which is here exemplarily designed in the manner of a film cutting machine, in a side view. The cutting machine 19 has a machine frame 20 which is fastened to a floor 21 and has a cutting station 12. The cutting station 12 is fed with metal strip 14 which is unwound from a coil 18 at an unwinding station 13. The metal strip 14 is cut by the cutting station 12 in a first longitudinal direction 34 of the metal strip 14 into a plurality of parallel first metal strips 2.1 and a plurality of parallel second metal strips 2.2. The first metal strips 2.1 and second metal strips 2.2 initially run uniformly and alternately next to one another and are then separated so that the first metal strips 2.1 are fed to a first winding station 1.1 and the second metal strips 2.2 are fed to a second winding station 1.2. At the first winding station 1.1, the first metal strips 2.1 are wound up to form first tape rolls 3.1 and at the second winding station 1.2, the second metal strips 2.2 are wound up to form second tape rolls 3.2. In the exemplary embodiment shown here, the first winding station 1.1 and the second winding station 1.2 are of identical design and are arranged mirror-symmetrically to one another. It should be made clear here that a different arrangement of the winding stations 1.1, 1.2 is also possible. The following description relates to the first winding station 1.1, but this can be transferred accordingly to the second winding station 1.2.

The first winding station 1.1 is assigned a first contact roller unit 15 and a second contact roller unit 16, which rest on a circumference 35 of the first tape rollers 3.1 with a contact force and by means of which, inter alia, cut edge deformations on the individual first metal strips 2.1 can be reduced or completely are recoverable. Furthermore, the first winding station 1.1 has a frame 4 on which a carrier 5 for the first tape rolls 3.1 is attached. The frame 4 is in turn arranged movably on the machine frame 20 of the cutting machine 19 in a (horizontal) tape feed direction 36.

The Fig. 2 shows the first winding station 1.1 in a front view. The carrier 5 is fastened to the frame 4 at its first longitudinal end 37 and its second longitudinal end 38 and is not rotatable relative to the frame 4. The ones in the Fig. 1 The first metal strips 2.1 shown are each fed to a separate winding tube 6 and can be wound onto the respective winding tube 6 to form a plurality of first tape rolls 3.1. In the embodiment variant shown here, twelve first tape rolls 3.1 are wound up parallel to one another on twelve winding tubes 6. The winding tubes 6 have the same spacing 22 in a second longitudinal direction 39 of the carrier 5. The individual winding tubes 6 can each be driven with a separate ring-shaped drive 7 around an axis of rotation 23, the drives 7 being fastened within the winding tubes 6 to the carrier 5. The axis of rotation 23 and the second longitudinal direction 39 of the carrier 5 run parallel to one another. A width 8 of the individual drives 7 in the second longitudinal direction 39 of the carrier 5 is at most twice as large as a strip width 9 of an individual one Fig. 1 shown first metal strip 2.1. The first winding station 1.1 also includes a controller 17 by means of which the individual drives 7 can be controlled independently of one another. It should be made clear here that each drive 7 can also be assigned its own controller 17.

The Fig. 3 FIG. 11 shows a schematic sectional illustration along the line in FIG Fig. 2 Section line III-III shown (without showing the first roll of tape 3.1). It can be seen here that the carrier 5 has an annular cross section and is tubular with a first inner peripheral surface 27 and a first outer peripheral surface 24. The drive 7 has an annular stator 25 fastened in a rotationally fixed manner to the first outer circumferential surface 24 of the carrier 5, and one around the annular stator 25 rotatable annular rotor 26. A second inner circumferential surface 29 of the stator 25 makes contact with the first outer circumferential surface 24 of the carrier 5. A connection line 10 is from the stator 25 through an opening (not shown here) in the carrier 5 into an interior 28 of the carrier 5 and from there to one here energy source not shown and / or to the one in the Fig. 2 control 17 shown. The rotor 26 has a clamping device 11 by means of which the winding tube 6 can be fastened to the rotor 26. The winding tube 6 can thus be rotated by the rotor 26. The clamping device 11 is designed here, for example, in the manner of four punches 30, which can be adjusted in a radial direction 40 from a second outer peripheral surface 31 of the rotor 26 in the direction of a third inner peripheral surface 32 of the winding tube 6. The four punches 30 of the clamping device 11 are here arranged offset from one another by 90 ° in a circumferential direction 41 of the second outer circumferential surface 31 of the rotor 26. By rotating the winding tube 6 are on a third outer peripheral surface 33 of the winding tube 6 in the Fig. 2 shown first roll of tape 3.1 windable. The Fig. 3 shows a sectional view through one of the in FIG Fig. 2 twelve winding points shown. The other eleven winding points are identical, so that the Fig. 3 is transferable to all winding points.

With the present invention, a plurality of tape rolls with greater uniformity can be produced in parallel on a carrier of a winding station.

List of reference symbols

1.1, 1.2

Changing station

2.1, 2.2

Metal strip

3.1, 3.2

Tape rolls

4th

frame

5

carrier

6th

Winding core

7th

drive

8th

width

9

Strip width

10

Connecting cable

11

Clamping device

12

Cutting station

13

Unwinding station

14th

Metal band

15th

first contact roller unit

16

second contact roller unit

17th

control

18th

Coil

19th

Cutting machine

20th

Machine frame

21st

ground

22nd

distance

23

Axis of rotation

24

first outer peripheral surface

25th

stator

26th

rotor

27

first inner peripheral surface

28

inner space

29

second inner peripheral surface

30th

stamp

31

second outer peripheral surface

32

third inner peripheral surface

33

third outer peripheral surface

34

first longitudinal direction

35

scope

36

Tape feed direction

37

first longitudinal end

38

second longitudinal end

39

second longitudinal direction

40

radial direction

41

Circumferential direction

Claims (10)

Winding station (1.1, 1.2) for winding a plurality of metal strips (2.1, 2.2) into a plurality of tape rolls (3.1, 3.2), at least comprising: - a frame (4), - A carrier (5) for receiving a plurality of winding tubes (6), the carrier (5) being fastened to the frame (4), and - A plurality of drives (7) by means of which at least two of the winding tubes (6) of the plurality of winding tubes (6) can be driven separately. Winding station (1.1, 1.2) according to claim 1, wherein the plurality of drives (7) are attached to the carrier (5). Winding station (1.1, 1.2) according to one of the preceding claims, wherein each drive (7) of the plurality of drives (7) is annular. Winding station (1.1, 1.2) according to one of the preceding claims, wherein each drive (7) of the plurality of drives (7) has a width (8) which is at most twice as large as a strip width (9) of an individual metal strip (2.1 , 2.2) of the plurality of metal strips (2.1, 2.2). Winding station (1.1, 1.2) according to one of the preceding claims, wherein the plurality of drives (7) has at least one connection line (10) and wherein the at least one connection line (10) runs at least partially through the carrier (5). Winding station (1.1, 1.2) according to one of the preceding claims, wherein each winding tube (6) of the plurality of winding tubes (6) is attached to a drive (7) of the plurality of drives (7). Winding station (1.1, 1.2) according to claim 6, wherein each winding tube (6) of the plurality of winding tubes (6) is fastened to the drive (7) with a separate clamping device (11). Method for winding a plurality of metal strips (2.1, 2.2) to form a plurality of tape rolls (3.1, 3.2), each metal strip (2.1, 2.2) of the plurality of metal strips (2.1, 2.2) on a winding tube (6) of a plurality of winding tubes (6) is wound up, the individual winding tubes (6) of the plurality of winding tubes (6) being arranged next to one another on a carrier (5) of a winding station (1.1, 1.2) and at least two winding tubes (6) of the plurality of winding tubes (6 ) are driven separately with at least one drive (7). Method according to patent claim 8, wherein the drives (7) generate a constant specific strip tension in the individual metal strips (2.1, 2.2). Use of a plurality of ring-shaped drives (7) for separately driving a plurality of winding tubes (6) at a winding station (1.1, 1.2) for winding a plurality of metal strips (2.1, 2.2) into a plurality of tape rolls (3.1, 3.2).

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