WO2010086141A1 - Device and method for winding a band having a variable band thickness, particularly a metal band - Google Patents

Abstract

A device (1) for winding a band (3), particularly a metal band, having a variable band thickness into a roll (2), comprising an assembly for introducing a malleable material onto the band (3) to be wound, characterized in that the assembly comprises means (11, 22) for creating a flexible, particularly an elastic material or a self-swelling or expandable material and for introducing it into the roll (2). The invention also relates to a corresponding method.

Description

 DEVICE AND METHOD FOR HITCHING ONE

BANDES WITH CHANGING

BAND THICKNESS, IN PARTICULAR OF A METAL BAND

The invention relates to a device for winding a tape with variable strip thickness, in particular a flat or contoured, a flexibly rolled and / or a profile-rolled metal strip, in particular made of steel, to a winding with an arrangement for introducing a deformable material the rewinding tape.

Above all, the invention relates to the winding of slit strips. Slit strips arise when strip-shaped material, in particular metallic broadband, drawn from a coil and longitudinally divided into narrow bands, d. H. split, will. The narrow slit strips produced in this way are then wound onto a common mandrel or separate mandrels. Preferably, composite rolls are produced from a multiplicity of adjacent split strips. To compensate for variations in thickness over the width of the strip, which lead to a conical or cambered surface when winding the slit strips, in particular in the edge regions of the strip deposits must be introduced into the winding of the slit strips.

Even when winding split strip material on a continuous drum with several, separated by circular blanks, coaxially juxtaposed Aufwickelhaspeln of slitting lines it comes as a result of different thicknesses and thicknesses more or less tightly wound coils with a correspondingly different tape sag. The uneven winding of the coils has a detrimental effect on their appearance, packaging, the drainage behavior and the friction between the individual tape turns. To avoid these shortcomings, it is known to wrap paper or cardboard strips of suitable length dimensions between the turns of the slit strips. This often happens because the Paper strip is inserted by hand into the winding slot between the incoming tape and the coil.

From DE 80 06 563 IM a device for introducing Zwischenla- strips in the winding slot of coils to be wound coils is known, in which the paper strip is conveyed by means of a pair of driving rollers in the direction of the winding slot. Here, the storage container for the paper strip as the intermediate layer paper strip containing drum container is formed behind the strip outlet slot which is provided by an electric motor driven roller pair. Behind the pair of driving wheels, a strip separating and perforating device is provided. As a result, the intermediate legestreifen by the pair of driving wheels at high speed and with simultaneous temporary deformation to a downwardly open, stable air support profile free-flying are injected into the winding slot. The liner strip must be deformed by the roof-shaped profiling of the drive rollers so that it contains a sufficiently stable, carried by the air profile, which allows him to shoot over a larger free flight distance in the winding slot, which exploited in addition to the air bearing effect at the same time the acceleration effect becomes.

The interleaving strips are either taken from a stack container containing the strips in appropriate lengths and individually inserted into the coil of the metal strip or withdrawn from a strip supply roll and separated in each necessary wrapping length.

EP 0 166 795 B1 describes a method for winding a plurality of split strips produced by slitting strip-shaped material onto a common winding mandrel in which the strip-shaped material has a thickness deviation across its width.

The method is characterized in that the slit strips at the same time to a composite wrap having a width of all side by side Fender slit strip extending deformable band-shaped insert to be wound up. The thickness of the insert is chosen to be greater than the thickness deviation across the width of the band-shaped material. When winding the slit strips are pressed by exerting a force on the respective uppermost winding layer of the slit strips and / or the insert in the radial direction of the composite coil thicker slit strips stronger than the thinner in the insert and the slit strips by appropriate deformation of the insert to a composite coil with cylindrical Covering surface wound up. According to this method, a non-coated or a coated metallic strip can be wound up as a band-shaped material. As a deformable insert preferably paper, cardboard, plastic, in particular foam, or used with a corrosion inhibitor impregnated paper.

Furthermore, it is known not only to produce flat metal bands, but also those which have contours in the longitudinal and / or transverse direction. In DE 198 31 882 A1 a method and a rolling mill for producing an arbitrary thickness profile over the width of a strip-shaped rolling stock are described. In this case, the starting material is deformed by a plurality of rollers arranged one behind the other in the rolling direction almost only in the width direction. The rollers allow a locally targeted deformation according to the desired profiling, wherein the penetration depends on the respective employment of the individual narrow rollers or rollers. The starting material is either a ferrous material or a non-ferrous metal; It comes a cold or hot deformation used.

From DE 199 62 754 A1 a method for flexible rolling of a metal strip is known. This method is used for the production of flat metal strips, which have different thicknesses defined over their length. In this case, the roll gap is selectively changed during the rolling process in order to achieve different strip thicknesses over the length of the metal strip. On the one hand, this can be done indirectly by changing the deformation resistance of the material by heating or cooling the metal strip and correspondingly changed springing of the roll stand during the rolling process.

EP 1 074 317 A2 also relates to a method for flexibly rolling a metal strip, wherein the metal strip is guided during the rolling process through a nip formed between two work rolls and the nip is deliberately moved during the rolling process in order to achieve different strip thicknesses over the length of the metal strip , Here, during each setting of the roll gap or immediately thereafter, the bending lines of the work rolls are controlled depending on the set roll gap to achieve flatness of the metal strip.

It is the object of the invention to improve a method for winding a band, in particular a flat or contoured, a flexibly rolled and / or a profiled rolled metal strip, such that in a simple manner, a regular at least substantially cylindrical winding is produced ,

According to the invention, this object is achieved in the aforementioned method in that the arrangement comprises means for producing a resilient, in particular an elastic material or a self-swelling or foamable material and for introduction into the winding.

According to the invention, the appropriate materials are used on site in accordance with the requirements of the tape to be wound, ie taking into account its surface condition as well as the expected deviation from the roundness of the wound reel to provide an elastic substance, in particular a solidifying foam available , which is introduced into the winding to the extent that a completely or almost round winding is formed. Thus, the arrangement according to the invention is particularly suitable for winding metallic slit strips, in particular made of steel, but also for other tape materials, such as Plastic, for example thermosets or thermoplastics. The inventively serving as a liner materials protect the tape surfaces and improve the ability to wind. The advantages of uniformly wound coils also exist in the better transportability and in the ease of further processing. Even changes in the thickness of the strip, be it in the longitudinal or in the transverse direction, can be compensated at any time by changing the material order.

Advantageous developments of the invention will become apparent from the dependent claims.

According to the invention it is advantageously provided that the serving as a deposit material is aufgerakelt on the respective uppermost layer of the roll or sprayed from side by side in a row arranged nozzles on the surface of the roll or sprayed. The material, for example, a foamable plastic, can also be sprayed across the width according to the desired application thickness in different thicknesses and individually over certain zones in the width of the roll. Also in the case of scratching, the squeegee is either set equidistantly over the entire width of the reel, or it is adjusted inclined with respect to the axis of rotation of the reel, to compensate for an emerging conical winding of the reel.

Preferably, the arrangement extends over the entire width of the roll or at least over a large part of the width of the roll. In the latter case, only the critical zones are covered, in which experience shows that irregularities are increased.

In a further advantageous embodiment of the invention, it is provided that the material is applied in strips on the winding. This procedure serves on the one hand to get along with as little as possible intermediate material, on the other hand, when applying a radial to the winding acting force the material in the areas between the strips evade to create in this way an optimally round winding.

In another embodiment of the invention, the plastic is advantageously applied from an extruder to the winding.

To increase the elasticity, it is provided that the plastic forms a coherent layer or a plurality of strips adjacent to one another in the strip running direction on the winding, each of which has air inclusions. During foaming, air or another gas is introduced into the hardening plastic according to the desired elasticity in order to compress the insert layer later either under the dead weight of the material to be wound or under the influence of a radially acting contact pressure.

In order to further improve the effect of introducing the material layer, a measuring device for measuring the strip thickness of the metal strip to be wound up can be integrated, which passes on the strip thickness values it has measured to a control device. This wins from the signals representing the strip thickness then a controlled variable to regulate the delivery of material from the nozzles, the addition of a foaming agent, air, and the like. According to the measured strip thickness of the metal strip or adjust in the case of a doctor whose employment to the winding surface.

The invention also relates to a rolling mill for cold or warm disposable or reversible rolling a metal strip with variable strip thickness, in particular a flat or contoured, a flexibly rolled or a profile-rolled metal strip, in particular of steel, with a roll stand, the a roller set and a setting system for adjusting the roll gap, with a roll stand upstream device for unwinding the metal strip to be rolled and a roll stand downstream winding device, as described above de. In this case, the metal strip can have all forms of profiles in the longitudinal and / or transverse direction. The tape thickness can change over the length and / or the width.

The rolling mill is inventively characterized by the fact that a control device for controlling the rotational speed of the drives of the two winding devices with a superordinate tail control to compensate for or control the mass flow changes of the rolled strip and the dependent of these strip tension and for controlling the strip tension is present, especially at the times to which the tape acceleration changes as the tape thickness profile changes. The rolling of the strip can also take place in an in-line casting and rolling plant, at the end of which a device for coiling the rolled strip is arranged.

The invention also relates to a method for winding a tape with variable strip thickness, in particular a flat or contoured, a flexibly rolled and / or profiled rolled metal strip, in particular of steel, to form a winding, in which deformable material during the Wickeins on the Winding is applied.

The method is characterized in that the deformable material is applied from nozzles or by means of at least one doctor blade to the surface of the strip, in particular of the metal strip. According to the invention, tapes can be coiled up which have a variable strip thickness in the longitudinal and / or transverse direction. In particular, special profiles can be incorporated in the bands.

Advantageously, the method is further configured in that the material is applied to the metal strip with a thickness that is greater than the thickness deviation of the metal strip, and that subsequently to the respective uppermost end of the coil, a force, in particular by means of a roller, is applied to compress the material such that an at least substantially cylindrical composite winding of the metal strip and the material is formed.

In a particularly advantageous manner, the method is carried out so that the material is brought by the addition of an additive shortly before application or during application for swelling or foaming.

Various forms of irradiation, especially just before application or during application, may be employed to aid swelling or foaming and / or curing.

The invention will be explained in more detail in an embodiment. The sole figure shows a cross-wound to a winding tape movable device for spraying foam on the uppermost layer of the coil in the slot between the incoming band and the winding.

An applicator 1 (Figure) for applying or spraying a foamable plastic on a winding 2 of a metal strip 3 comprises a stationary substructure 4. This carries two pairs of bearing blocks 5 for impeller axes 6, on which two pairs of rollers 7 are rotatably mounted. Depending on a pair of successively arranged rollers 7 serves to guide u-shaped guide rails 8, which are connected to a support member 9 for the applicator 1. They are so long that they protrude from the support member 9. The substructure 4 is arranged outside the band region determined by the length of a reel mandrel 10, so that the device 1 can optionally be moved outside the band area or within the band area in front of the reel mandrel 10. At the completion of the reeling process, the winding 2 reaches a maximum outer circumference. At the beginning of the reeling operation is a boom 11 for spraying or applying the plastic, the device 1 in the dot-dashed position 11 'to the Apply material close to the surface of the metal strip 3, while it assumes the position 11 "towards the end of the winding process.

The device 1 is pivotally arranged relative to the support member 9 by the support member 9 is provided with a pivot axis 12 for two pivot levers 13, which can be pivoted together by a hydraulic actuator 14, the pendulum via a bearing 15 fixed to support plates 16 of the guide rails 8 is. The device 1 is pivotally connected via a pair of tabs 17 and a hinge pin 18 at a free end of the pivot lever 13 and is supported via a pair of rollers 19 on a slotted guide 20 of the support member 9 from.

The applicator 1 comprises a telescopic actuator 21 carried by the pair of tabs 17 to position the cantilever 11 at a suitable distance relative to the surface of the belt 3 or to temporarily remove it from the belt 2 for cleaning purposes, for example. The boom 11 includes a preferably replaceable cartridge for applying the application material, which is preferably sprayed from a nozzle 22 or a plurality of in the axial direction of the winding mandrel 10 juxtaposed nozzles 22.

Various substances which are required for the production of the application medium are supplied via at least one supply hose 23, in particular also in conjunction with a pressurized gas, in order to push the substance to be applied out of the cartridge. In addition, a radiator (not shown) may be provided near the nozzles 22, which promotes curing of the applied material.

Instead of a liquid, foamy or viscous material, in particular a plastic, can also be a granulate, in particular in conjunction with a plastic or adhesive, or a quilt-like material, for example, with selectively optimized Teilkissenvolumina, in the winding. 2 bring in to achieve a uniform winding structure. The cushions remain closed as needed, at least in certain areas being filled with suitable materials or media. These can then emerge from the cushions under certain pressure or temperature conditions, in particular after completion of the winding process.

According to the invention, the use of a (shown only schematically) pinch roller 24 can be provided, which is arranged in the circumferential direction after the introduction of the foam or the cushion material or granules in the winding 2 and the outer periphery uniformized by compressing the introduced material.

LIST OF REFERENCE NUMBERS

1 application device

reel

3 Band 'Position of the Band 3

substructure

bearing blocks

wheel axles

castors

guide rails

Support part 0 Coiler mandrel 1 Boom 1 'Position of the jib 11 1 "Position of the jib 11 2 Swiveling axis 3 Swing lever 4 Servo motor 5 Bearing 6 Supporting brackets 7 Pair of lugs 8 Hinge pins 9 Pair of rollers 0 Sliding guide 1 Adjusting device 2 Nozzle 3 Supply hose 4 Pressure roller

Claims

claims 1. A device (1) for winding a tape (3) with variable tape thickness, in particular a flat or contoured, a flexibly rolled and / or a profile-rolled metal strip, in particular of steel, to form a winding (2) with an arrangement for Introducing a deformable material onto the band (3) to be wound, characterized in that the arrangement comprises means (11, 22) for producing a resilient, in particular elastic, material or a self-swelling or foamable material and for introduction into the coil (2) , 2. Device (1) according to claim 1, characterized in that the material aufrakelbar or from nozzles (22) can be sprayed or sprayed. 3. Device (1) according to claim 1 or 2, characterized in that the arrangement extends over the entire width of the coil (2) or at least over a large part of the width of the coil (2). 4. Device (1) according to one of claims 1 to 3, characterized in that the material in strips on the winding (2) can be applied. 5. Device (1) according to one of claims 1 to 4, characterized that the plastic from an extruder on the winding (2) can be applied. 6. Device (1) according to any one of claims 1 to 5, characterized in that the plastic forms a continuous layer or a plurality of adjacent strip in the direction of tape strip on the winding (2), each having airs in conclusions. 7. Device (1) according to any one of claims 1 to 6, characterized in that a measuring device for measuring the strip thickness of the wound strip (3) is provided and that a control device, the dispensing the material delivery from the nozzles (22) corresponding to the measured strip thickness of the band (3) regulates. 8. Device (1) according to one of claims 1 to 7, characterized in that a pressure device, in particular a roller (24), a contact pressure on the winding (2) exerts to compress it with deformation of the introduced material. 9. rolling mill for cold or warm disposable or Reversierwalzen a metal strip (3) with variable strip thickness, in particular a flat or contoured, a flexibly rolled and / or profiled rolled metal strip, in particular steel, with a rolling stand, the a roll set and a setting system for adjusting the roll gap, a rolling mill upstream device for unwinding the metal strip to be rolled and a roll stand downstream winding device (1) according to one of claims 1 to 8, characterized that a control device for controlling the rotational speed of the drives of the two winding devices (1) with a superordinate tail control for compensating or regulating the mass flow changes of the rolled strip and the dependent of these strip tension and for controlling the strip tension is present, especially at the times at which the Tape acceleration changes as the tape thickness profile changes. 10. A method for coiling a tape (3) with variable strip thickness, in particular a flat or contoured, a flexibly rolled and / or a profile-rolled metal strip, in particular of steel, to form a winding (2), in which deformable during Wickeins Material is applied to the winding (2), characterized in that the deformable material from nozzles or by means of at least one doctor blade is applied to the surface of the belt (3). 11. The method according to claim 9, characterized in that the material with a thickness on the metal strip (3) is applied, which is greater than the thickness deviation of the metal strip (3), and that subsequently to the respective uppermost end of the coil (2) a force, in particular by means of a roller (24), is exerted to compress the material such that an at least substantially cylindrical composite winding (2) of the metal strip (3) and the material is formed. 12. The method according to claim 10 or 11, characterized in that the material is brought by the addition of an additive, shortly before application or during application for swelling or foaming. 13. The method according to claim 12, characterized in that the material is brought under irradiation, especially shortly before application or during application, for swelling or foaming and / or curing.