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EP0062025A1 - Device for winding straightened steel strips - Google Patents

Device for winding straightened steel strips Download PDF

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Publication number
EP0062025A1
EP0062025A1 EP82890013A EP82890013A EP0062025A1 EP 0062025 A1 EP0062025 A1 EP 0062025A1 EP 82890013 A EP82890013 A EP 82890013A EP 82890013 A EP82890013 A EP 82890013A EP 0062025 A1 EP0062025 A1 EP 0062025A1
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EP
European Patent Office
Prior art keywords
winding
strip
curvature
straightening
longitudinal
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82890013A
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German (de)
French (fr)
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EP0062025B1 (en
Inventor
Hans Jörg Weinzinger
Rudolf Pichler
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Voestalpine AG
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Voestalpine AG
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Publication date
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Publication of EP0062025A1 publication Critical patent/EP0062025A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/34—Apparatus for taking-out curl from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/02—Winding-up or coiling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/05—Stretching combined with rolling

Definitions

  • Sheet metal strips that are flat after a straightening process are subjected to a bending load when they are wound on a reel depending on the respective winding diameter, the material properties and the strip tension, which causes the zero line of the residual stresses of the strip from the center of the strip after the straightening process Center is shifted, which after unwinding of the tape results in a tape longitudinal curvature that requires a new straightening of the tape before further processing.
  • DE-PS 908 004 it is known (DE-PS 908 004) to arrange a bending roller or bending drum after the reel, around which the strip is bent in the opposite direction to the curvature during winding.
  • the invention is therefore based on the object of specifying a method for winding directional sheet metal strips, with the aid of which such a message of the metal sheets becomes unnecessary because after the sheet metal coils have been unwound, the zero line of the residual stresses of the strip coincides with the center of the strip.
  • the invention solves this problem in that the sheet metal strips are given a longitudinal curvature opposite to the winding curvature and decreasing with increasing winding diameter before winding. -Therefore, according to this measure, by pre-bending the tape to be wound up, the zero line after the straightening process remaining residual stresses of the strip are shifted from the center of the strip to such an extent that the bending occurring when the strip is wound up moves the zero line of these residual stresses back into the neutral strip zone, a flat strip is obtained after unwinding the sheet metal bundle, which is no longer subjected to a subsequent straightening process needs to be. Because of the smaller the curvature of the tape when the tape is wound up, the tape must of course be given a smaller longitudinal tape curvature with the larger diameter of the tape before winding to ensure that the tape runs out smoothly after the coil has been unwound.
  • the fibers running next to the band waves must be stretched to the length of the fibers of the shaft belly.
  • the length difference between the fibers in the corrugated area and in the non-corrugated area of the strip thus determines the lowest degree of stretch required for the flatness of a strip, with which the material properties experience the least change.
  • a stretch bending device has become known (AT-PS 358 900), in which the degree of stretch between the tensioning roller sets for the band to be straightened is controlled in accordance with the respective band ripple.
  • the changing degree of stretching requires a shift in the zero line of the remaining residual stresses of the strip, so that the associated longitudinal curvature of the strip must be corrected.
  • the straightening roller which is arranged downstream of the bending rollers to compensate for such curvatures, is set differently, with the aid of a control device, to which the actual value of the detectable strip transverse curvature is fed via an actual value transmitter.
  • the transverse curvature which is formed in a band under tension is dependent on the longitudinal curvature which forms in the case of a free spring back of the band, so that the longitudinal curvature can actually be corrected via the amplitude detection of the band transverse curvature.
  • the strip is to be given a longitudinal curvature opposite to the winding curvature before it is wound up on a reel
  • the known stretch bending straightening device compensates for any longitudinal curvatures that may occur by an additional bending process
  • this known stretch bending straightening device can be used to carry out the method according to the invention.
  • the known device In order to be able to impart a corresponding longitudinal curvature to the sheet metal coils to be wound up, the known device must be modified in that the control device with a computer-based computer program determining the transverse curvature of the strip depending on the desired value of the longitudinal strip curvature from the changing winding diameter taking into account the material properties and the strip tension Setpoint generator is connected.
  • the adjustment roller adjustment is made possible by correcting the respective setpoint / actual value difference controlled that the zero line of the residual stresses remaining from the straightening process is not moved out into the neutral band zone, but out of it so far that in order to shift the zero line of the residual stresses into the neutral zone, a bending of the strip in the longitudinal direction is required, as is the case during the subsequent winding of the Band inevitably occurs on the reel.
  • the dependence of this pre-bending on the winding diameter can be taken into account by the computer by specifying the respective winding diameter, for example via a corresponding measuring device, with the material properties of the strip and the strip tension also having to be observed, of course, since these variables also influence the strip curvature during winding . Since the mathematical relationships of these quantities are based only on simplifying models, a corresponding correction based on empirical values will usually be necessary, which can easily be taken into account by a suitable computer program.
  • the stretch bending straightening device consists of two tensioning roller sets 1 and 2, between which two bending rollers 3 and a subsequent straightening roller 4 are provided.
  • the tension to be applied between the tensioning roller sets 1 and 2 on the belt 5 is via the drives 6 and? of the tension roller sets 1 and 2 controlled, the entry and exit speed of the strip 5 being detected by measuring rollers 8 and being fed to an actual value transmitter 9 which derives the actual value for the degree of stretch of the strip from the speed difference.
  • This actual value of the degree of stretching is fed to the controller 10, which drives the 6th and 7 is controlled as a function of a target / actual value difference.
  • the setpoint for the degree of stretching can be specified as a constant value or, depending on the respective band ripple, can be limited to the necessary minimum, which makes the setpoint specification as a reference variable necessary.
  • an adjusting drive 11 is provided for the adjustment of the straightening roller 4, which is designed as a hydraulic cylinder in the exemplary embodiment.
  • the actuation of this actuating drive 11 can be controlled via a valve 12, which can be adjusted, for example, via a magnetic actuating device 13, specifically via a control device 14, which on the one hand connects to an actual value transmitter 15 downstream of the tensioning roller set 2 on the outlet side, and on the other hand, for the amplitudes of strip curvatures a computer 16 is connected as a setpoint.
  • the actual value transmitter 15 has two support rollers 17 for the belt 5, between which a plurality of electromagnets 18 arranged over the bandwidth are arranged. About these electromagnets 18 approximately perpendicular forces are exerted on the tape surface, the resulting sag between the two support rollers 17 determines the air gap between the tape 5 and the magnet 18, so that the different deflection of the excitation winding Band and thus the amplitude of the band waves can be determined.
  • the straightening roller 4 must accordingly be set so that the desired transverse curvature is displayed via the actual value transmitter 15.
  • This transverse curvature of the strip which is dependent on the longitudinal curvature, can be derived from the respective winding diameter given known material properties and a predetermined strip tension. This is carried out in the computer 16, to which the required data are predefined via an input 19 and which, from these predefined values in accordance with the defined program, specifies the respective desired value of the strip transverse curvature as a function of the continuously changing winding diameter of the reel of the control device 14.
  • the required straightening roller employment can thus be regulated from a target / actual value comparison.
  • the band 5 Since the band 5 is not flat after the straightening process, but has received a longitudinal curvature, the associated longitudinal curvature during winding of the band can cancel out the associated displacement of the zero line of the residual stresses of the strip, so that the zero line of the residual stresses coincides with the center of the strip.
  • the strip treated in such a manner therefore runs out flat after it has been unwound and does not need to be adjusted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Advancing Webs (AREA)

Abstract

Um ein Band (5) eben von einem Haspel abwickeln zu können, wird dem Band (5) vor dem Aufwickeln eine zur Wickelkrümmung gegensinnige, mit zunehmendem Wickeldurchmesser abnehmende Längskrümmung erteilt.In order to be able to unwind a band (5) from a reel, the band (5) is given a longitudinal curvature opposite to the winding curvature and decreasing with increasing winding diameter before winding.

Description

Blechbänder, die nach einem Richtvorgang plan sind, werden beim Aufwickeln auf einem Haspel in Abhängigkeit vom jeweiligen Wickeldurchmesser, von den Werkstoffeigenschaften und vom Bandzug einer Biegebelastung unterworfen, die bewirkt, daß die nach dem Richtvorgang in der Bandmitte liegende Nullinie der Eigenspannungen des Bandes aus der Mitte verlagert wird, was nach dem Abwickeln des Bandes eine Bandlängskrümmung zur Folge hat, die ein neuerliches Richten des Bandes vor der Weiterverarbeitung erfordert. Zu diesem Zweck ist es bekannt (DE-PS 908 004), dem Haspel eine Biegerolle oder Biegetrommel nachzuordnen, um die das Band beim Abwickeln gegensinnig zur Krümmung beim Aufwickeln gebogen wird.Sheet metal strips that are flat after a straightening process are subjected to a bending load when they are wound on a reel depending on the respective winding diameter, the material properties and the strip tension, which causes the zero line of the residual stresses of the strip from the center of the strip after the straightening process Center is shifted, which after unwinding of the tape results in a tape longitudinal curvature that requires a new straightening of the tape before further processing. For this purpose, it is known (DE-PS 908 004) to arrange a bending roller or bending drum after the reel, around which the strip is bent in the opposite direction to the curvature during winding.

Der Erfindung liegt somit die Aufgabe zugrunde, ein Verfahren zum Aufwickeln von gerichteten Blechbändern anzugeben, mit dessen Hilfe ein solches Nachrichten der Bleche unnötig wird, weil nach dem Abwickeln der Blechbunde die Nullinie der Eigenspannungen des Bandes mit der Bandmitte zusammenfällt.The invention is therefore based on the object of specifying a method for winding directional sheet metal strips, with the aid of which such a message of the metal sheets becomes unnecessary because after the sheet metal coils have been unwound, the zero line of the residual stresses of the strip coincides with the center of the strip.

Die Erfindung löst die gestellte Aufgabe dadurch, daß den Blechbändern vor dem Aufwickeln eine zur Wickelkrümmung gegensinnige, mit zunehmendem Wickeldurchmesser abnehmende Längskrümmung erteilt wird. -Da zufolge dieser Maßnahme durch das Vorbiegen des aufzuwickelnden Bandes die Nullinie der.nach dem Richtvorgang verbleibenden Eigenspannungen des Bandes in einem solchen Maß aus der Bandmitte verlagert wird, daß die beim Aufwickeln des Bandes auftretende Biegung die Nullinie dieser Eigenspannungen wieder in die neutrale Bandzone zurückverlagert, wird nach dem Abwickeln des Blechbundes ein planes Band erhalten, das keinem nachträglichen Richtvorgang mehr unterworfen zu werden braucht. Wegen der mit zunehmendem Wickeldurchmesser geringeren Bandkrümmung beim Aufwickeln des Bandes muß dem Band selbstverständlich eine mit dem größer werdenden Wickeldurchmesser kleinere Bandlängskrümmung vor dem Aufwickeln erteilt werden, um ein planes Auslaufen des Bandes nach dem Abwickeln des Bundes sicherzustellen.The invention solves this problem in that the sheet metal strips are given a longitudinal curvature opposite to the winding curvature and decreasing with increasing winding diameter before winding. -Therefore, according to this measure, by pre-bending the tape to be wound up, the zero line after the straightening process remaining residual stresses of the strip are shifted from the center of the strip to such an extent that the bending occurring when the strip is wound up moves the zero line of these residual stresses back into the neutral strip zone, a flat strip is obtained after unwinding the sheet metal bundle, which is no longer subjected to a subsequent straightening process needs to be. Because of the smaller the curvature of the tape when the tape is wound up, the tape must of course be given a smaller longitudinal tape curvature with the larger diameter of the tape before winding to ensure that the tape runs out smoothly after the coil has been unwound.

Um die Streifen eines längsgeteilten Blechbandes unter einem gleichmäßigen Zug auf eine gemeinsame Wickeltrommel aufwickeln zu können, ist es schließlich bekannt (FR-PS 1 468 856), die unter einer Schlingenbildung spannungslos zur Wickeltrommel geführten Bandstreifen durch eine Bremseinrichtung laufen zu lassen, bevor sie über zwei Führungsrollen zur Wickeltrommel gelangen. Da die Bandstreifen S-förmig um die Führungsrollen laufen, werden die Bandstreifen vor dem Aufwickeln auch gegensinnig zum Wickelsinn gebogen, was allerdings auf die nachfolgende Krümmung des Bandes beim Aufwickeln keinen Einfluß hat, weil durch die S-förmige Führung der Bandstreifen die Nullinie der Eigenspannungen nicht verschoben wird.Finally, in order to be able to wind up the strips of a longitudinally divided sheet metal strip with a uniform pull on a common winding drum, it is known (FR-PS 1 468 856) to let the strip strips run without tension to the winding drum through a braking device before they over two guide rollers reach the winding drum. Since the tape strips run in an S-shape around the guide rollers, the tape strips are also bent in the opposite direction to the winding direction before winding, which, however, has no influence on the subsequent curvature of the tape during winding, because the zero line of the residual stresses due to the S-shaped guidance of the tape strips is not moved.

Zum Richten eines welligen Bandes müssen die neben den Bandwellen verlaufenden Fasern auf die Länge der Fasern des Wellenbauches getreckt werden. Die Längedifferenz-zwischen den Fasern im Wellenbereich und im nicht gewellten Bereich des Bandes bestimmt somit den für die Planheit eines Bandes erforderlichen, geringsten Streckgrad, mit dem die Werkstoffeigenschaften die geringste Änderung erfahren. Um nun nicht mit einem an die größte Welligkeit eines Blechbandes angepaßten Streckgrad das Band richten zu müssen, ist eine Streckbiegevorrichtung bekannt geworden (AT-PS 358 900), bei der der Streckgrad zwischen den Spannrollensätzen für das zu richtende Band entsprechend der jeweiligen Bandwelligkeit gesteuert wird. Der sich ändernde Streckgrad bedingt allerdings eine Verlagerung der Nullinie der verbleibenden Eigenspannungen des Bandes, so daß die damit verbundene Längskrümmung des Bandes ausgeregelt werden muß. Zu diesem Zweck wird die zum Ausgleichen solcher Krümmungen den Biegerollen nachgeordnete Richtrolle über einen Stelltrieb unterschiedlich angestellt, und zwar mit Hilfe einer Regelungseinrichtung, der der Istwert der erfaßbaren Bandquerkrümmung über einen Istwertgeber zugeleitet wird. Die sich bei einem unter einer Zugspannung stehenden Band ausbildende Querkrümmung hängt von der sich bei einem freien Rückfedern des Bandes ausbildenden Längskrümmung ab, so daß über die Amplitudenerfassung der Bandquerkrümmung tatsächlich die Iängskrümmung ausgeregelt werden kann.To straighten a wavy band, the fibers running next to the band waves must be stretched to the length of the fibers of the shaft belly. The length difference between the fibers in the corrugated area and in the non-corrugated area of the strip thus determines the lowest degree of stretch required for the flatness of a strip, with which the material properties experience the least change. Not with the greatest ripple on a sheet metal strip A stretch bending device has become known (AT-PS 358 900), in which the degree of stretch between the tensioning roller sets for the band to be straightened is controlled in accordance with the respective band ripple. The changing degree of stretching, however, requires a shift in the zero line of the remaining residual stresses of the strip, so that the associated longitudinal curvature of the strip must be corrected. For this purpose, the straightening roller, which is arranged downstream of the bending rollers to compensate for such curvatures, is set differently, with the aid of a control device, to which the actual value of the detectable strip transverse curvature is fed via an actual value transmitter. The transverse curvature which is formed in a band under tension is dependent on the longitudinal curvature which forms in the case of a free spring back of the band, so that the longitudinal curvature can actually be corrected via the amplitude detection of the band transverse curvature.

Obwohl gemäß der Erfindung dem Band vor seinem Aufwickeln auf einen Haspel eine zur Wickelkrümmung gegensinnige Längskrümmung erteilt werden soll, wogegen die bekannte Streckbiegerichtvorrichtung allenfalls auftretende Längskrümmungen durch einen zusätzlichen Biegevorgang ausgleicht, kann zur Durchführung des erfindungsgemäßen Verfahrens von dieser bekannten Streckbiegerichtvorrichtung ausgegangen werden. Um den aufzuwickelnden Blechbändern eine entsprechende Längskrümmung erteilen zu können, muß die bekannte Vorrichtung dadurch abgeändert werden, daß die Regelungseinrichtung mit einem die jeweilige vom Sollwert der Bandlängskrümmung abhängige Querkrümmung des Bandes aus dem sich ändernden Wikkeldurchmesser unter Berücksichtigung der Werkstoffeigenschaften und des Bandzuges programmbedingt ermittelnden Rechner als Sollwertgeber verbunden wird. Durch eine entsprechende Sollwertvorgabe wird die Richtrollenanstellung durch ein Ausregeln der jeweiligen Soll-Istwertdifferenz so gesteuert, daß die Nullinie der aus dem Richtvorgang verbleibenden Eigenspannungen nicht in die neutrale Bandzone, sondern aus dieser soweit herausgelagert wird, daß zum Verlagern der Nullinie der Eigenspannungen in die neutrale Zone eine Biegung des Bandes in Längsrichtung erforderlich wird, wie sie beim nachfolgenden Aufwickeln des Bandes auf dem Haspel zwangsläufig auftritt. Die Abhängigkeit dieser Vorbiegung vom Wickeldurchmesser kann über den Rechner durch die Vorgabe des jeweiligen Wickeldurchmessers, beispielsweise über eine entsprechende Meßeinrichtung, ohne Schwierigkeiten berücksichtigt werden, wobei selbstverständlich auch die Werkstoffeigenschaften des Bandes und der Bandzug beobachtet werden müssen, da diese Größen die Bandkrümmung beim Aufwickeln mitbeeinflussen. Da die mathematischen Zusammenhänge dieser Größen nur auf vereinfachenden Modellvorstellungen beruhen, wird üblicherweise eine entsprechende Korrektur auf Grund von empirischen Werten notwendig werden, was durch ein geeignetes Rechnerprogramm ohne weiteres berücksichtigt werden kann.Although according to the invention the strip is to be given a longitudinal curvature opposite to the winding curvature before it is wound up on a reel, whereas the known stretch bending straightening device compensates for any longitudinal curvatures that may occur by an additional bending process, this known stretch bending straightening device can be used to carry out the method according to the invention. In order to be able to impart a corresponding longitudinal curvature to the sheet metal coils to be wound up, the known device must be modified in that the control device with a computer-based computer program determining the transverse curvature of the strip depending on the desired value of the longitudinal strip curvature from the changing winding diameter taking into account the material properties and the strip tension Setpoint generator is connected. With a corresponding setpoint specification, the adjustment roller adjustment is made possible by correcting the respective setpoint / actual value difference controlled that the zero line of the residual stresses remaining from the straightening process is not moved out into the neutral band zone, but out of it so far that in order to shift the zero line of the residual stresses into the neutral zone, a bending of the strip in the longitudinal direction is required, as is the case during the subsequent winding of the Band inevitably occurs on the reel. The dependence of this pre-bending on the winding diameter can be taken into account by the computer by specifying the respective winding diameter, for example via a corresponding measuring device, with the material properties of the strip and the strip tension also having to be observed, of course, since these variables also influence the strip curvature during winding . Since the mathematical relationships of these quantities are based only on simplifying models, a corresponding correction based on empirical values will usually be necessary, which can easily be taken into account by a suitable computer program.

An Hand der Zeichnung, die eine erfindungsgemäße Anlage zum Erteilen einer Längskrümmung für aufzuwickelnde Blechbänder in einem schematischen Blockschaltbild zeigt, wird das Verfahren zum Aufwickeln gerichteter Blechbänder zu Bunden näher erläutert.With reference to the drawing, which shows a system according to the invention for issuing a longitudinal curvature for sheet metal strips to be wound up in a schematic block diagram, the method for winding directed sheet metal strips into coils is explained in more detail.

Die Streckbiegerichtvorrichtung gemäß der Zeichnung besteht aus zwei Spannrollensätzen 1 und 2, zwischen denen zwei Biegerollen 3 und eine nachgeschaltete Richtrolle 4 vorgesehen sind. Die zwischen den Spannrollensätzen 1 und 2 auf das Band 5 aufzubringende Zugspannung wird über die Antriebe 6 und ? der Spannrollensätze 1 und 2 gesteuert, wobei die Ein- und Auslaufgeschwindigkeit des Bandes 5 über Meßrollen 8 erfaßt und einem Istwertgeber 9 zugeführt werden, der aus der Geschwindigkeitsdifferenz den Istwert für den Streckgrad des Bandes ableitet. Dieser Istwert des Streckgrades wird dem Regler 10 zugeführt, der die Antriebe 6 und 7 in Abhängigkeit von einer Soll-Istwertdifferenz ansteuert. Der Sollwert für den Streckgrad kann dabei als konstanter Wert vorgegeben sein oder in Abhängigkeit von der jeweiligen Bandwelligkeit auf das notwendige Mindestmaß beschränkt werden, was die Sollwertvorgabe als Führungsgröße notwendig macht.The stretch bending straightening device according to the drawing consists of two tensioning roller sets 1 and 2, between which two bending rollers 3 and a subsequent straightening roller 4 are provided. The tension to be applied between the tensioning roller sets 1 and 2 on the belt 5 is via the drives 6 and? of the tension roller sets 1 and 2 controlled, the entry and exit speed of the strip 5 being detected by measuring rollers 8 and being fed to an actual value transmitter 9 which derives the actual value for the degree of stretch of the strip from the speed difference. This actual value of the degree of stretching is fed to the controller 10, which drives the 6th and 7 is controlled as a function of a target / actual value difference. The setpoint for the degree of stretching can be specified as a constant value or, depending on the respective band ripple, can be limited to the necessary minimum, which makes the setpoint specification as a reference variable necessary.

Um die Lage der Nullinie der nach dem Richtvorgang im Band verbleibenden Eigenspannungen bezüglich der neutralen Bandzone beeinflussen zu können, ist für die Anstellung der Richtrolle 4 ein Stelltrieb 11 vorgesehen, der im Ausführungsbeispiel als hydraulischer Zylinder ausgebildet ist. Die Beaufschlagung dieses Stelltriebes 11 kann über ein Ventil 12 gesteuert werden, das beispielsweise über eine magnetische Betätigungseinrichtung 13 verstellt werden kann, und zwar über eine Regelungseinrichtung 14, die einerseits an einen dem auslaufseitigen Spannrollensatz 2 nachgeordneten Istwertgeber 15 für die Amplituden von Bandquerkrümmungen und anderseits an einen Rechner 16 als Sollwertvorgabe angeschlossen ist.In order to be able to influence the position of the zero line of the residual stresses remaining in the strip after the straightening process with respect to the neutral strip zone, an adjusting drive 11 is provided for the adjustment of the straightening roller 4, which is designed as a hydraulic cylinder in the exemplary embodiment. The actuation of this actuating drive 11 can be controlled via a valve 12, which can be adjusted, for example, via a magnetic actuating device 13, specifically via a control device 14, which on the one hand connects to an actual value transmitter 15 downstream of the tensioning roller set 2 on the outlet side, and on the other hand, for the amplitudes of strip curvatures a computer 16 is connected as a setpoint.

Der Istwertgeber 15 weist zwei Auflagerollen 17 für das Band 5 auf, zwischen denen mehrere über die Bandbreite verteilte Elektromagnete 18 angeordnet sind. Über diese Elektromagnete 18 werden etwa senkrecht auf die Bandoberfläche stehende Kräfte auf das Band ausgeübt, wobei der dadurch bedingte Durchhang zwischen den beiden Auflagerollen 17 den Luftspalt zwischen dem Band 5 und den Magneten 18 bestimmt, so daß über die Spannung der Erregerwicklung die unterschiedliche Ablenkweite des Bandes und damit die Amplitude der Bandwellen ermittelt werden kann. Damit nun bei einem Aufwickeln des gerichteten Blechbandes 5 auf einem nachfolgenden Aufwickelhaspel durch die damit verbundene Biegung

Figure imgb0001
Nulllinie der Eigenspannungen des Bandes nicht aus der neutralen Bandzone verlagert werden können, muß die Nullinie der Eigenspannungen vor dem Aufwickeln des Bandes um ein entsprechendes Maß im Gegensinn gegenüber der neutralen Bandzone verlagert werden, indem dem Band eine zur Wickelkrümmung gegensinnige Längskrümmung erteilt wird, und zwar über die Richtrolle 4. Da die Längskrümmung eines unter einer Zugspannung stehenden Bandes nicht erfaßt werden kann, die Längskrümmung aber eine Querkrümmung zur Folge hat, kann die beim freien Rückfedern des Bandes auftretende Längskrümmung lediglich über die Querkrümmung erfaßt werden. Die Richtrolle 4 muß demnach jeweils so angestellt werden, daß über den Istwertgeber 15 die gewünschte Querkrümmung angezeigt wird. Diese von der Längskrümmung abhängige Querkrümmung des Bandes kann bei bekannten Werkstoffeigenschaften und vorgegebenem Bandzug vom jeweiligen Wickeldurchmesser abgeleitet werden. Dies wird im Rechner 16 durchgeführt, dem die erforderlichen Daten über einen Eingang 19 vorgegeben werden und der aus diesen vorgegebenen Werten gemäß dem festgelegten Programm den jeweiligen Sollwert der Bandquerkrümmung in Abhängigkeit von dem sich laufend ändernden Wickeldurchmesser des Haspels der Regelungseinrichtung 14 vorgibt. Aus einem Soll-Istwertvergleich kann somit die erforderliche Richtrollenanstellung geregelt werden.The actual value transmitter 15 has two support rollers 17 for the belt 5, between which a plurality of electromagnets 18 arranged over the bandwidth are arranged. About these electromagnets 18 approximately perpendicular forces are exerted on the tape surface, the resulting sag between the two support rollers 17 determines the air gap between the tape 5 and the magnet 18, so that the different deflection of the excitation winding Band and thus the amplitude of the band waves can be determined. So now when the directed sheet metal strip 5 is wound on a subsequent take-up reel by the bend associated therewith
Figure imgb0001
The zero line of the internal tension of the tape cannot be shifted from the neutral tape zone, the zero line of the internal tension before the tape is wound up by a corresponding amount in the opposite direction to the neutral one Band zone are shifted by giving the tape a longitudinal curvature opposite to the winding curvature, specifically via the straightening roller 4. Since the longitudinal curvature of a tape under tension cannot be detected, but the longitudinal curvature results in a transverse curvature, this can result in the case of free springback of the band occurring longitudinal curvature can only be detected via the transverse curvature. The straightening roller 4 must accordingly be set so that the desired transverse curvature is displayed via the actual value transmitter 15. This transverse curvature of the strip, which is dependent on the longitudinal curvature, can be derived from the respective winding diameter given known material properties and a predetermined strip tension. This is carried out in the computer 16, to which the required data are predefined via an input 19 and which, from these predefined values in accordance with the defined program, specifies the respective desired value of the strip transverse curvature as a function of the continuously changing winding diameter of the reel of the control device 14. The required straightening roller employment can thus be regulated from a target / actual value comparison.

Da das Band 5 nach dem Richtvorgang nicht plan ist, sondern eine Längskrümmung erhalten hat, kann durch die gegensinnige Längskrümmung beim Aufwickeln des Bandes die damit verbundene Verlagerung der Nullinie der Eigenspannungen des Bandes aufgehoben werden, so daß die Nullinie der Eigenspannungen mit der Bandmitte zusammenfällt. Das in einer solchen Weise behandelte Band läuft daher nach seinem Abwickeln plan aus und braucht nicht nachgerichtet zu werden.Since the band 5 is not flat after the straightening process, but has received a longitudinal curvature, the associated longitudinal curvature during winding of the band can cancel out the associated displacement of the zero line of the residual stresses of the strip, so that the zero line of the residual stresses coincides with the center of the strip. The strip treated in such a manner therefore runs out flat after it has been unwound and does not need to be adjusted.

Claims (2)

Verfahren zum Aufwickeln gerichteter Blechbänder (5) zu Bunden, dadurch gekennzeichnet, daß den Blechbändern (5) vor dem Aufwickeln eine zur Wickelkrümmung gegensinnige, mit zunehmendem Wickeldurchmesser abnehmende Längskrümmung erteilt wird.Method for winding up directed sheet metal strips (5) into coils, characterized in that the sheet metal strips (5) are given a longitudinal curvature opposite to the winding curvature and decreasing with increasing winding diameter before winding. 2. Anlage zur Durchführung des Verfahrens nach Anspruch 1 mit einer einem Aufwickelhaspel vorgeordneten Streckbiegerichtvorrichtung, die aus zwei Spannrollensätzen (1, 2) für das zu richtende Band (5) und aus einer wenigstens zwei Biegerollen (3) nachgeordneten Richtrolle (4) zwischen den Spannrollensätzen (1, 2 ) besteht, sowie mit einer Regelungseinrichtung (14), die an einem dem auslaufseitigen Spannrollensatz (2) nachgerodneten Istwertgeber (15) für die Amplituden von Bandquerkrümmungen angeschlossen ist und einen Stelltrieb (11) zur Richtrollenanstellung steuert, dadurch gekennzeichnet, daß die Regelungseinrichtung (14) mit einem die jeweilige vom Sollwert der Bandlängskrümmung abhängige Querkrümmung des Bandes (5) aus dem sich ändernden Wickeldurchmesser unter Berüdsichtigung der Werkstoffeigenschaften und des Bandzuges programmbedingt ermittelnden Rechner (16) als Sollwertgeber verbunden ist.2. Plant for performing the method according to claim 1 with a pre-winding reel stretching straightening device consisting of two tensioning roller sets (1, 2) for the strip to be straightened (5) and at least two bending rollers (3) downstream straightening roller (4) between the There are tensioner roller sets (1, 2), and with a control device (14), which is connected to an actual value transmitter (15) for the amplitudes of belt transverse curvatures retrofitted to the outlet-side tensioner roller set (2) and controls an actuator (11) for adjusting the straightening roller, characterized in that that the control device (14) is connected as a setpoint generator to a transverse curvature of the strip (5), which depends on the desired value of the longitudinal strip curvature, from the changing winding diameter, taking into account the material properties and the strip tension, as a result of the program.
EP82890013A 1981-03-26 1982-01-27 Device for winding straightened steel strips Expired EP0062025B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0140481A AT368044B (en) 1981-03-26 1981-03-26 METHOD AND DEVICE FOR WINDING DISHES-TED TAPES
AT1404/81 1981-03-26

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EP0062025A1 true EP0062025A1 (en) 1982-10-06
EP0062025B1 EP0062025B1 (en) 1984-11-28

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JP (1) JPS57170345A (en)
AT (1) AT368044B (en)
DD (1) DD201857A5 (en)
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FR2567049A1 (en) * 1984-07-06 1986-01-10 Mitsubishi Heavy Ind Ltd METHOD FOR CORRECTING THE DEFORMATIONS OF A BANDED FLAT FLAT PRODUCT
FR2586595A1 (en) * 1985-09-05 1987-03-06 Maubeuge Fer DEVICE FOR PLANTING A METAL BAND UNDER TRACTION.
EP0341970A3 (en) * 1988-05-10 1991-02-06 Kobayashi Engineering Works, Ltd. Sheet curls reformer
FR2729373A1 (en) * 1995-01-16 1996-07-19 Trefimetaux PACKAGING IN FUT OF PRE-DRESSED COPPER ALLOY WIRE
EP0732160A3 (en) * 1995-03-14 1997-08-20 Bwg Bergwerk Walzwerk Method for straightening continuously thin metal strips, in particular strips made of aluminium and stainless steel with a thickness between 0,1 mm and 0,5 mm and straightening plant therefor
CN109967558A (en) * 2019-03-19 2019-07-05 浙江申吉钛业股份有限公司 Straightening method with front-end winding device with improved straightening accuracy of titanium alloy sheet

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DE4323385C1 (en) * 1993-07-13 1995-01-19 Bwg Bergwerk Walzwerk Method for eliminating transverse curvatures in metal strips, in particular thin metal strips up to 2.0 mm thick
FR2790982B1 (en) * 1999-03-15 2001-05-04 Inst Francais Du Petrole METHOD AND DEVICE FOR CONTROLLING THE DEFORMATION OF A ROLLING METAL PIPE
AU757340B2 (en) 1999-04-02 2003-02-20 Hunter Douglas Industries Bv Method and arrangement for automatic bow adjustment
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US7441318B2 (en) * 2005-02-09 2008-10-28 The Goodyear Tire & Rubber Co Method for detecting exposed metal cords in an elastomeric strip
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FR2567049A1 (en) * 1984-07-06 1986-01-10 Mitsubishi Heavy Ind Ltd METHOD FOR CORRECTING THE DEFORMATIONS OF A BANDED FLAT FLAT PRODUCT
FR2586595A1 (en) * 1985-09-05 1987-03-06 Maubeuge Fer DEVICE FOR PLANTING A METAL BAND UNDER TRACTION.
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EP0732160A3 (en) * 1995-03-14 1997-08-20 Bwg Bergwerk Walzwerk Method for straightening continuously thin metal strips, in particular strips made of aluminium and stainless steel with a thickness between 0,1 mm and 0,5 mm and straightening plant therefor
CN109967558A (en) * 2019-03-19 2019-07-05 浙江申吉钛业股份有限公司 Straightening method with front-end winding device with improved straightening accuracy of titanium alloy sheet

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US4457149A (en) 1984-07-03
AT368044B (en) 1982-08-25
EP0062025B1 (en) 1984-11-28
JPS57170345A (en) 1982-10-20
ATA140481A (en) 1982-01-15
DD201857A5 (en) 1983-08-17

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