KR20110089183A - Device and method for winding a band having a variable band thickness, particularly a metal band - Google Patents

Abstract

The invention relates to a device for winding a strip 3 having a variable strip thickness, in particular a metal strip, with a winding roll 2, comprising an assembly for inserting a deformable material into the strip 3 to be wound. In the winding device, the assembly comprises means (11, 22) for producing a flexible, in particular elastic or self-expansible or foamable material and inserting it into the winding roll (2). will be. The invention also relates to a corresponding method.

Description

DEVICE AND METHOD FOR WINDING A BAND HAVING A VARIABLE BAND THICKNESS, PARTICULARLY A METAL BAND}

The present invention relates to winding rolls of varying strip thicknesses, in particular steel, and especially of flat metal strips, or contoured metal strips, flexibly rolled metal strips, and / or profile rolled metal strips. 1. An apparatus for winding up), comprising a assembly for inserting a deformable material into a strip to be wound.

In particular, the invention relates to the winding of split strips. The split strip occurs when the strip in the form of a strip, in particular a metal strip, is withdrawn from the coil and cut longitudinally into narrow strips in the longitudinal direction, that is to say when split. The narrow split strips thus produced are then wound on a common mandrel or on separate mandrels. Composite wound-rolls are preferably made of a plurality of split strips located next to each other. At this time, inserts must be inserted into the winding rolls of the split strips in order to compensate for the thickness variation over the strip width which would result in winding of the split strips, in particular in the conical or convex surface of the strip region.

Winding-up reel of a longitudinal cutting line, the strip being divided on a through drum comprising a plurality of said winding reels separated from one another by sheet-metal blank and coaxially next to each other. Even when winding up the material, due to the different strip thicknesses and coating thicknesses, strip deflections correspondingly vary and result in coils which are usually fixedly wound. Uneven winding of the coil negatively affects the appearance, packaging, outflow behavior and friction between the individual strip windings. In order to prevent such a defect, it is known to insert a winding paper or cardboard strip having a suitable length dimension between the windings of the split strips. This is often done by manually inserting a paper strip into the winding slit between the coiled metal strip and the coil.

From DE 80 06 563 U1 a device for inserting an interlayer strip into a winding slit of strip material to be wound into a coil is known, in which case the paper strip is transferred into the winding slit by a pair of drive rollers. In this connection the storage container for the paper strip is formed as a drum container containing an interlayer paper strip, and behind the strip outlet slit of the drum container is provided with a pair of drive rollers driven by an electric motor. The rear of the drive roller pair is provided with a strip cutting and drilling device. By doing so, the interlayer strip can be inserted into the take-up slit in a free flight manner at high speed conditions by the drive roller pair and at the same time temporarily deformed into a stable air support profile opened downwardly. The interlayer strip should be deformed in such a way as to have a sufficiently stable and air-supported profile by the roofing profiling of the drive rollers, the profile having the interlayer strip into the winding slit even over a relatively longer free flight section. Allows for insertion, in addition to the air support effect, the acceleration effect is also used simultaneously. The interlayer strips exit from the lamination container containing the strips to a suitable length and are inserted into the take-up rolls of the metal strips individually, or withdrawn from the strip storage rolls and cut off to the respective required take-up lengths. EP 0 166 795 B1 describes a method for winding a plurality of split strips made through longitudinal cutting of strip shaped material onto a common winding mandrel, in which case the strip shaped material has a thickness over its width. Indicates a deviation. The winding method is characterized in that the split strips are simultaneously wound into a composite winding roll with an insert in the form of a deformable strip extending over the width of all split strips extending next to each other. In this case the thickness of the insert is chosen to be thicker than the thickness variation that appears over the width of the strip-like material. In winding the split strips, thicker split strips insert more strongly than thinner split strips by applying force to the insert and / or the top winding roll layer of each of the split strips in the radial direction of the composite winding roll. Inserted in, the splitting strips are wound into a composite winding roll having a cylindrical enveloping surface by the corresponding deformation of the insert. According to this method, as strip-shaped material, an uncoated or coated metal strip may be wound. As inserts that can be deformed are preferably used paper, cardboard, plastic, in particular foam, or paper impregnated with corrosion inhibitors. It is also known to produce flat metal strips as well as to produce metal strips with contours in the longitudinal and / or transverse directions. DE 198 31 882 A1 describes a rolling mill and a method for producing any thickness profile over the width of a rolled article in the form of a strip. In this case, the starting material is deformed almost in the width direction only by a plurality of rolling rolls which are offset in the rolling direction and arranged continuously. Rolled rolls enable a locally targeted deformation corresponding to the desired profiling, and the depth of impression is determined by the adjustment of each of the narrow individual rolls or rollers. The starting material is an ferrous material or a nonferrous metal, and cold deformation or hot deformation is used as the deformation method. From DE 199 62 754 A1 a method for flexibly rolling metal strips is known. The method is used to produce flat metal strips having varying strip thicknesses in a range-limited manner over their length. In this case the gap between rolls is changed as desired to achieve various strip thicknesses over the length of the metal strip during the rolling process. This can be done indirectly, on the one hand, by altering the deformation resistance of the material through heating or cooling of the metal strip, and correspondingly also through altered expansion of the roll stand during the rolling process. In addition, EP 1 074 317 A2 relates to a method for flexibly rolling a metal strip, wherein the metal strip is guided through an inter-roll gap formed between two working rolls during the rolling process, the inter-roll gap being a metal strip during the rolling process. It is adjusted as desired to achieve various strip thicknesses over the length of. In this case, each time during or immediately after adjusting the roll gap, the bending line of the work rolls is controlled according to the roll roll gap adjusted to achieve flatness of the metal strip.

The object of the present invention is a uniform, at least substantially cylindrical winding in a method for winding strips, in particular flat metal strips or profiled metal strips, flexible rolled metal strips, and / or profile rolled metal strips. It is an improvement of the said winding method in the way that a roll is simply manufactured.

The object is that in the winding method first mentioned according to the invention, the assembly comprises means for producing a flexible, in particular an elastic material, or a self-expandable or foamable material and inserting it into the winding roll. Is achieved through that.

According to the invention, to the extent that a completely or nearly circular winding roll is produced, in accordance with the requirements of the strip to be wound in the field, that is to say in consideration of the expected deviation of the surface properties of the strip and the roundness of the winding roll to be wound. Suitable materials are used in order to be able to use the elastic material inserted in the winding roll, in particular the foam to be cured. Thus, the assembly according to the invention is particularly suitable for winding metal split strips of steel material, but also for winding other strip materials of plastic material such as, for example, Duro plastics or thermoplastics. The materials used as inserts according to the invention protect the strip surface and improve the winding capacity. In addition, the advantages of winding rolls that are uniformly wound are in improved transportability and ease of further processing. And the thickness change of the strip, regardless of the longitudinal and transverse directions, is also compensated at any time by changing the material application amount.

Advantageous refinement embodiments of the invention are presented from the dependent claims.

According to the invention, preferably, the material used as an insert is wound on each top layer of the take-up roll or sprayed or sprayed onto the surface of the take-up roll from nozzles arranged in series next to each other. In this case the material, ie the foamable plastic, for example, is sprayed over a range of thicknesses corresponding to the desired application thickness over the width, and individually over the designated area in the width of the winding roll. In addition, even in the case of rubbing, the doctor blades are adjusted at equal intervals over the entire width of the winding rolls, or in relation to the rotational axis of the winding rolls, so as to compensate for the conical winding of the contouring winding rolls. To be tilted.

Preferably the assembly extends over the entire width of the take-up roll, or at least over most of the width of the take-up roll. In the latter case, only the critical zones where the heterogeneity is strongly formed according to the experience overlap.

According to a further preferred embodiment of the invention, it is provided that the material is applied on the take-up roll in a strip. This procedure allows treatment on the one hand with as few interlayer materials as possible, while on the other hand it is possible to produce an optimal circular winding roll when applying a force acting on the winding roll in the radial direction. It may enter into the areas between the strips.

According to another embodiment of the invention, the plastic is preferably discharged from the extruder and applied onto the winding rolls.

In order to increase the elasticity, it is provided that the plastics form an adhesive layer on the winding rolls, or are located next to each other in the strip conveying direction and each form a plurality of strips including an air lock. Upon foaming, air or other gas is inserted into the plastic that cures corresponding to the desired elasticity so that the insert layer can be compressed under the inherent weight of the material to be wound or under the influence of the radially acting compressive force.

In order to further improve the insertion effect of the material layer, a measuring device for measuring the strip thickness of the metal strip to be wound is integrated, which sends the strip thickness values measured thereon to the control unit. Then adjust the delivery of material from the nozzles, the addition of blowing agent, air, etc., corresponding to the measured strip thickness of the metal strip, or in the case of the doctor blade, the doctor blade to be adapted to the winding roll outer surface. The control unit obtains a control variable from the signals that reproduce the strip thickness.

The invention also relates to metal strips having variable strip thicknesses, in particular steel materials, in particular flat metal strips or contoured metal strips, flexible rolled metal strips, or profile rolled metal strips in a unidirectional or reversible direction. In the rolling mill for cold or hot rolling by means of: a roll stand having a rolling roll set and an adjusting system for adjusting the gap between rolls, an apparatus for unwinding a metal strip to be rolled in front of the roll stand, and a roll stand It relates to the rolling mill which is arranged at the rear of and comprises a winding device as described above. In this case the metal strip can have all forms of profile in the longitudinal and / or transverse directions. The strip thickness can vary over length and / or width.

The mill according to the invention not only compensates or controls the mass flow change of the rolled strip and the strip pulling speed according to this mass flow change, especially at the point when the strip acceleration is changed upon changing the strip thickness profile, but also the strip tension. A control unit for controlling the rotational speeds of the drive units of the two winding devices together with the upper control unit control unit for controlling is provided. The rolling of the strip can also be disclosed in an inline casting and rolling system in which an apparatus for winding the rolled strip is arranged at the distal end.

The present invention furthermore relates to winding strips having variable strip thicknesses, in particular steel materials, in particular flat metal strips, or contoured metal strips, flexible rolled metal strips and / or profile rolled metal strips, with winding rolls. A method of the present invention relates to a winding method, wherein a deformable material is applied onto the winding rolls during winding.

The winding method is characterized in that the deformable material is discharged from the nozzles or is applied to the surface of the strip, in particular the metal strip, by at least one doctor blade. According to the invention, strips having variable strip thicknesses in the longitudinal and / or transverse directions are wound. In particular, special profiles can be inserted in the strips.

Preferably the winding method further comprises a method in which a material having a thickness thicker than the thickness variation of the metal strip is applied onto the metal strip, followed by a composite winding roll consisting of the metal strip and the material at least substantially cylindrical. It is realized through the application of a force, in particular by a roll, to each top end of the take-up roll so as to compress the material into it.

Particularly preferably the winding method is carried out in such a way that the material is expanded or foamed immediately before or during the application of the additive.

In particular, various forms of radiation are used to aid in expansion or foaming and / or curing immediately before or during application.

In the following the invention is explained in more detail by way of examples.

The only figure attached is a schematic diagram showing an apparatus for spraying foam material on the top layer of the winding roll in the slit between the strip being wound and the winding roll while being able to move transversely with respect to the strip wound with the winding roll. .

The application device 1 (FIG.) For applying or spraying the expandable plastic onto the winding roll 2 of the metal strip 3 comprises a support structure 4 which is fixed in position. This support structure bears two pairs of bearing stands 5 for the track wheel axes 6, on which two pairs of track rollers 7 are rotatably mounted. Each pair of track rollers 7 arranged in succession serves to guide the u-shaped guide rails 8 connected with the support member 9 for the applicator 1. The length of the guide rails is formed long enough to protrude more than the support member 9. The support structure 4 is arranged outside of the strip area determined by the length of the winding mandrel 10, so that the device 1 is optionally out of the strip area in front of the winding mandrel 10, or It can be moved inward of the strip area. At the end of the winding process, the winding roll 2 reaches the maximum outer circumference. At the beginning of the winding process, a boom 11 (boom) for spraying or applying plastic is positioned at position 11 ', indicated by a dashed line, so that the material can be applied onto the metal strip 3 near the surface. In contrast, by the end of the winding process, the boom is in position 11 ".

The device 1 is arranged to be rotatable relative to the support member 9 via the support member 9 having a pivot shaft 12 for the two pivot levers 13, wherein the two pivot levers ( 13 may be rotated together by the hydraulic servo motor 14. The servo motor is then fixed to the support fishplate 16 of the guide rails 8 in a floating manner via the bearing 15. The device 1 is articulatedly connected to the free end of the pivoting lever 13 via a joint plate pair 17 and a joint bolt 18, and through the roller pair 19 a grooved support member 9. Supported by the link guide 20.

The application device 1 is capable of positioning the boom 11 at a distance apart relative to the surface of the strip 3, or temporarily spaced apart from the strip winding roll 2, for example for cleaning purposes. And a telescopic actuating device 21 supported by a pair of joint plates 17. The boom 11 is preferably exchanged for applying the coating material sprayed from the nozzle 22 or from a plurality of nozzles 22 arranged side by side in the axial direction of the winding mandrel 10. Possible cartridges are included.

The one or more supply hoses 23 are supplied in conjunction with a gas under pressure so as to press the material to be applied, in particular from the cartridge, for the production of the application medium. In addition to this, a radiator (not shown) may be provided near the nozzles 22 to facilitate curing of the applied material.

Instead of liquid, foamable, or viscous materials, in particular plastics, granular materials are also inserted into the winding rolls 2, in particular in combination with plastics or adhesives, or, for example, points, in order to achieve a uniform winding roll structure. A quilt-shaped material having a partially cushioned volume optimized in shape is inserted into the take-up roll 2. The cushion is kept closed for each need, wherein the cushion is at least filled with a suitable material or medium in a predetermined area. The material or medium may then exit the cushion at predetermined pressure or temperature conditions, in particular after the end of the winding process.

According to the invention, the use of a compaction roller 24 (shown here only schematically) is also provided, which is circumferentially after the foam or cushion material or particulate material has been inserted into the winding roll 2. The outer periphery is equalized by pressing the inserted material.

1: applicator
2: wound roll
3: strip
3 ': position of strip (3)
4: supporting structure
5: bearing stand
6: track wheel axis
7: track roller
8: guide rail
9: support member
10: winding mandrel
11: boom
11 ': position of the boom (11)
11 ": Position of the boom 11
12: rotating shaft
13: rotating lever
14: servo motor
15: bearing
16: support fishplate
17: joint plate pair
18: joint bolt
19: roller pair
20: slotted-link guide
21: working device
22: nozzle
23: supply hose
24: crimping roller

Claims (13)

Winding strips 3 of varying strip thickness, in particular steel, are particularly flat metal strips or contoured metal strips, flexible rolled metal strips, and / or profile rolled metal strips with winding rolls 2. A device (1) for the purpose of the winding device comprising an assembly for inserting a deformable material onto the strip (3) to be wound,
The assembly (1), characterized in that the assembly comprises means (11, 22) for producing a flexible, in particular elastic or self-expansible or foamable material and inserting it into the winding roll (2). The winding device (1) according to claim 1, wherein the material can be applied by rubbing or spraying or spraying from the nozzles (22). Winding device (1) according to claim 1 or 2, characterized in that the assembly extends over the entire width of the winding roll (2) or at least over most of the width of the winding roll (2). Winding device (1) according to any of the preceding claims, characterized in that the material can be applied on the winding roll (2) in a strip. Winding device (1) according to any of the preceding claims, characterized in that the plastic can flow out of the extruder and be applied onto the winding roll (2). The plastic according to any one of claims 1 to 5, wherein the plastics form an adhesive layer on the winding rolls 2, or are located next to each other in the strip conveying direction and each form a plurality of strips comprising an air lock. Winding apparatus 1 characterized by the above-mentioned. The measuring device according to any one of the preceding claims, wherein a measuring device for measuring the strip thickness of the strip (3) to be wound is provided, the control unit corresponding to the measured strip thickness of the strip (3) Winding apparatus 1 characterized by adjusting the material delivery from field 22. The pressing device, in particular the roll 24, according to any one of the preceding claims, applies a pressing force on the winding roll so as to compress the winding roll 2 under conditions in which the inserted material is deformed. Winding apparatus 1 characterized by the above-mentioned. Metal strips 3 with variable strip thickness, in particular steel, are particularly flat metal strips, or contoured metal strips, flexible rolled metal strips, and / or profile rolled metal strips in a unidirectional or reversible direction. Or as a rolling mill for hot rolling,
A roll stand having a rolling roll set and an adjustment system for adjusting the gap between rolls, an apparatus for unwinding a metal strip to be rolled by being placed in front of the roll stand, and arranged behind the roll stand, and claiming In the rolling mill comprising the winding device 1 according to any one of claims 8 to 8,
Higher control unit for controlling strip tension as well as compensating or controlling the mass flow change of the rolled strip and strip pulling speed according to this mass flow change, especially when the strip acceleration changes when the strip thickness profile is changed Rolling mill, characterized in that a control unit for controlling the rotational speed of the drive device of the two winding device (1) together with the control unit. A strip 3 having a variable strip thickness, in particular a steel material, in particular a flat metal strip, or a profiled metal strip, a flexibly rolled metal strip, and / or a profile rolled metal strip is taken up as a winding roll 2. As a method for winding up,
In the winding method, wherein a deformable material is applied on the winding roll 2 during the winding process,
Said deformable material is discharged from the nozzles, or is applied to the surface of the strip (3) by one or more doctor blades. 10. A composite winding according to claim 9, wherein a material having a thickness thicker than the thickness variation of the metal strip 3 is applied onto the metal strip 3, followed by the at least substantially cylindrical composite winding consisting of the metal strip 3 and the material. A winding method, characterized in that a force is applied to the top end of each of the winding rolls (2), in particular by the rolls (24), so that the material can be compressed in such a way that the rolls (2) are made. The winding method according to claim 10 or 11, wherein the material is expanded or foamed immediately before or during the application through the addition of the additive. 13. A winding method according to claim 12, wherein the material is expanded or foamed and / or cured, especially under conditions in which the radiation is emitted, just before or during the application.

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