EP3930940B1 - Method and device for straightening wire or strip material - Google Patents

Method and device for straightening wire or strip material Download PDF

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Publication number
EP3930940B1
EP3930940B1 EP20754611.0A EP20754611A EP3930940B1 EP 3930940 B1 EP3930940 B1 EP 3930940B1 EP 20754611 A EP20754611 A EP 20754611A EP 3930940 B1 EP3930940 B1 EP 3930940B1
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EP
European Patent Office
Prior art keywords
straightening rollers
straightening
dressing device
rollers
adjustable
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EP20754611.0A
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German (de)
French (fr)
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EP3930940A2 (en
Inventor
Arndt MÜHLENFELD
Walter Resch
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EVG Entwicklungs und Verwertungs GmbH
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EVG Entwicklungs und Verwertungs GmbH
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Publication of EP3930940A2 publication Critical patent/EP3930940A2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/02—Straightening
    • B21F1/023—Straightening in a device rotating about the wire axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/02—Straightening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • 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
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers

Definitions

  • the invention relates to a method for straightening wire or strip material by means of a dressing device with straightening rollers which act in an offset manner on opposite sides of the material passing through, some of which are automatically adjusted in such a way that the requirements for straightness are met, depending on a model which has been stochastically determined on the basis of input data of the material and data of the material and the dressing device determined as it passes through the dressing device, wherein the position of at least one straightening roller is continuously adapted on the basis of the said data recorded as it passes through the dressing device, which are representative of the straightness achieved.
  • the invention aims to provide a closed control loop for an autonomous process for straightening material of unknown, variable curvature.
  • the process should ensure the desired straightness of the straightened wire with greater reliability.
  • the temperature of the material is measured at the exit of each straightening roll or block.
  • the measurement (i) of the forces acting on the straightening rollers is conveniently carried out by means of strain gauges arranged on the bearing bolts of the straightening rollers, which measure the bending moments in axial, vertical and/or horizontal directions.
  • the measurement (ii) of the temperature records the deformation energy introduced into the material being straightened. This measurement can be used to correct material properties that are incorporated into the model. It is possible that this measurement is only carried out at the beginning of a straightening process or to calibrate a straightening device.
  • the measurement (iii) of the position of the material is carried out as described conveniently after each of the straightening rollers by measuring the deviation of the material from the throughput axis in the direction of the straightening rollers.
  • known optical or contactless (e.g. magnetic) Measuring method in question This also applies to the appropriate measurement of the vibrations occurring in the wire material passing through, the measured value of which is also entered into the model controlling the adjustment of the adjustable straightening rollers. It is conceivable that the position measurement (iii) is only carried out at the beginning of the process for calibration purposes, while during operation the measurement of the forces acting on the straightening rollers is sufficient to carry out the method according to the invention.
  • the material passes through two dressing devices as mentioned above one after the other, one dressing device having horizontally arranged straightening rollers and the other having vertically arranged straightening rollers.
  • the invention also relates to a device for carrying out the method according to the invention with a dressing device with two rows of driveless straightening rollers arranged longitudinally offset from one another, which during operation act on a wire running between the rows in order to straighten it, whereby some straightening rollers can be automatically adjusted to the material depending on a model so that the requirements for the straightness of the material emerging from the dressing device are met, whereby the model is determined stochastically based on input data of the wire and data of the dressing device and the material recorded in the dressing device.
  • a device is mentioned in the DE-A cited at the beginning.
  • the invention of such a device consists in that the straightening rollers of one row, which first act on the material, have fixed axes and the ones subsequently the straightening roller acting on the same side of the material can be adjusted individually to the material passing through, and that the straightening rollers of the opposite row can all be adjusted to the material, whereby the straightening rollers of this row which act on the material first can be adjusted together and the straightening roller of the same row which then acts on the material can be adjusted individually, and whereby the magnitude and direction of the forces acting on the straightening rollers can be measured by means of measuring devices arranged on these themselves, such as strain gauges, and/or the temperature of the material can be measured by means of measuring devices arranged at the inlet and outlet of the dressing device, and/or whereby means are provided for measuring the position of the material following each of the straightening rollers in the form of the deviation of the material from the passage axis in or parallel to the adjustment direction of the straightening rollers, whereby all measured values obtained can be fed to
  • the temperature of the material downstream of one or more straightening rollers can be measured by means of measuring devices arranged there, wherein all measured values obtained can also be fed to the model controlling the adjustment of the adjustable straightening rollers.
  • Fig.1 a training device with a wire running through it
  • Fig.2 the same dressage device with indicated measuring points of the forces occurring at the individual straightening rollers and the wire temperature
  • Fig.3 a straightening roller with a strain gauge attached to it.
  • the training device of the Fig.1 and 2 has two rows of horizontal straightening rollers 3, 4, 6, 10 arranged horizontally offset from one another. One row engages the wire to be straightened at the bottom and the other row engages the wire to be straightened at the top.
  • the material 1 to be straightened can also be strip material (not shown); in the following, the term material refers to the wire or strip material.
  • the straightening rollers 3, 4, 6, 10 have no rotary drive, the wire passes through the dressing device as material 1, which is moved in the direction of arrow 2 by feed rollers (not shown). Normally, the wire passes through two dressing devices one after the other, each offset by 90° to one another, with one dressing device having horizontal straightening rollers and the other dressing device having vertical straightening rollers.
  • the main working range of the invention covers wire diameters between about 4 mm and about 20 mm.
  • the first two straightening rollers 3 of the Fig.1 and 2 lower row have fixed axes of rotation.
  • the lower straightening roller 4 connected to this can be individually adjusted to the material 1 passing through by means of an adjusting device indicated at 5.
  • the first three straightening rollers 6 of the upper row can be adjusted together to the material 1 and for this purpose are mounted on a common carrier 7, the height of which can be adjusted by means of a lever 8 by a servomotor 9.
  • the upper straightening roller 10 connected to the upper straightening rollers 6 can be individually adjusted to the material by means of an adjusting device indicated at 11.
  • Fig.2 illustrates the measurements of the various forces acting on the individual straightening rollers, designated f, as well as the temperature measurements on the material 1 before and after passing through the arrangement of straightening rollers.
  • the material 1 is heated during straightening by a set of straightening rollers.
  • the temperature measuring devices are indicated at points 16.
  • the temperature measurement can also be carried out at the output of each of the straightening rollers 3, 4, 6, 10.
  • the measuring devices arranged after each of the straightening rollers 3, 4, 6, 10 for determining the position of the wire are in Fig.2 not shown. These are known optical or magnetic measuring devices which measure the deviation of the material 1 from the throughput axis in or parallel to the direction of adjustment of the straightening rollers 6, 4, 10, ie in the case shown in the vertical direction. Also not shown is a vibration measuring device which measures the vibrations occurring on the wire when straightening corrugated wires in order to eliminate the resulting disturbances.
  • Fig.3 shows a straightening roller 13 on a larger scale with strain gauges 17 arranged on its bearing bolt 12 in a groove 15.
  • strain gauges 17 are provided in the bearing bolt 12 of a straightening roller.
  • the strain gauges 17 are arranged parallel to one another in the bearing bolt 12. They are also arranged around the axis of the bearing bolt 12 at quarter-circle intervals (offset by 90°).
  • other pressure or bending measuring sensors can be used in or on the bearing bolt 12, e.g. piezo sensors with an equally simple design.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Geraderichten von Draht oder Bandmaterial mittels einer Dressurvorrichtung mit an gegenüberliegenden Seiten des durchlaufenden Materials versetzt angreifenden Richtrollen, von denen einige abhängig von einem Modell, welches anhand von Eingangsdaten des Materials und bei dessen Durchlauf durch die Dressurvorrichtung ermittelten Daten des Materials und der Dressurvorrichtung stochastisch ermittelt worden ist, automatisch so angestellt werden, dass die Anforderungen an die Geradheit erfüllt werden, wobei die Stellung mindestens einer Richtrolle laufend adaptiert wird aufgrund der genannten, beim Durchlauf durch die Dressurvorrichtung erfassten Daten, welche für die erzielte Geradheit repräsentativ sind.The invention relates to a method for straightening wire or strip material by means of a dressing device with straightening rollers which act in an offset manner on opposite sides of the material passing through, some of which are automatically adjusted in such a way that the requirements for straightness are met, depending on a model which has been stochastically determined on the basis of input data of the material and data of the material and the dressing device determined as it passes through the dressing device, wherein the position of at least one straightening roller is continuously adapted on the basis of the said data recorded as it passes through the dressing device, which are representative of the straightness achieved.

Ein derartiges Verfahren ist beschrieben in der DE-A-196 53 569 . Diese Schrift spricht jedoch nur sehr allgemein von während des laufenden Richtprozesses gemessenen Produkt- und/oder Prozessdaten, die online in das Modell eingebracht werden und dieses verändern, ohne die dafür nötigen Messungen zu spezifizieren. Es ist auch nicht klar, ob bzw. in welchem Ausmaß das Modell einen Rückschluss auf die genaue Geometrie des gerichteten Endproduktes zulässt.Such a procedure is described in the DE-A-196 53 569 However, this document only speaks very generally about product and/or process data measured during the straightening process, which are introduced online into the model and change it, without specifying the measurements required for this. It is also not clear whether or to what extent the model allows conclusions to be drawn about the exact geometry of the straightened end product.

Die Erfindung stellt sich die Aufgabe, einen geschlossenen Regelkreis für ein autonomes Verfahren anzugeben, um Richtgut von unbekannter, variabler Krümmung geradezurichten. Das Verfahren soll mit größerer Verlässlichkeit die angestrebte Geradheit des gerichteten Drahtes gewährleisten.The invention aims to provide a closed control loop for an autonomous process for straightening material of unknown, variable curvature. The process should ensure the desired straightness of the straightened wire with greater reliability.

Dies wird beim eingangs genannten Verfahren dadurch erreicht, dass

  1. (i) die Größe und Richtung der an den Richtrollen angreifenden Kräfte an den Richtrollen selbst und/oder
  2. (ii) die Temperatur des Materials vor und nach dem Durchgang durch die Anordnung der Richtrollen und/oder
  3. (iii) die Position des Materials im Anschluss an jede der Richtrollen in Form der Abweichung des Materials von der Durchlaufachse in bzw. parallel zur Anstellrichtung der Richtrollen gemessen und die erhaltenen Messwerte in das die Anstellung der anstellbaren Richtrollen steuernde Modell eingegeben werden.
This is achieved in the above-mentioned procedure by
  1. (i) the magnitude and direction of the forces acting on the straightening rollers on the straightening rollers themselves and/or
  2. (ii) the temperature of the material before and after passing through the arrangement of straightening rollers and/or
  3. (iii) the position of the material following each of the straightening rollers is measured in the form of the deviation of the material from the axis of travel in or parallel to the direction of adjustment of the straightening rollers and the measured values obtained are entered into the model controlling the adjustment of the adjustable straightening rollers.

Vorteilhaft wird (ii) die Temperatur des Materials am Ausgang jeder Richtrolle oder jedes Richtblockes gemessen.Advantageously, (ii) the temperature of the material is measured at the exit of each straightening roll or block.

Die Messung (i) der an den Richtrollen angreifenden Kräfte erfolgt zweckmäßig mittels an den Lagerbolzen der Richtrollen angeordneter Dehnungsmessstreifen, welche die Biegemomente in axialer, vertikaler und/oder horizontaler Richtung messen.The measurement (i) of the forces acting on the straightening rollers is conveniently carried out by means of strain gauges arranged on the bearing bolts of the straightening rollers, which measure the bending moments in axial, vertical and/or horizontal directions.

Die Messung (ii) der Temperatur erfasst die in das Richtgut eingebrachte Umformungsenergie. Durch diese Messung können gegebenenfalls Materialeigenschaften, die in das Modell einflie-ßen, korrigiert werden. Es ist möglich, dass diese Messung nur am Anfang eines Richtprozesses oder zum Kalibrieren einer Richtvorrichtung durchgeführt wird.The measurement (ii) of the temperature records the deformation energy introduced into the material being straightened. This measurement can be used to correct material properties that are incorporated into the model. It is possible that this measurement is only carried out at the beginning of a straightening process or to calibrate a straightening device.

Die Messung (iii) der Position des Materials erfolgt wie beschrieben zweckmäßig in Anschluss an jede der Richtrollen durch Messung der Abweichung des Materials von der Durchlaufachse in der Anstellrichtung der Richtrollen. Hierfür kommen bekannte optische oder berührungslose (z.B. magnetische) Messverfahren in Frage. Dies gilt auch für die zweckmäßige Messung der am durchlaufenden Drahtmaterials auftretenden Vibrationen, deren Messwert ebenso in das die Anstellung der anstellbaren Richtrollen steuernde Modell eingegeben wird. Es ist denkbar, dass die Positionsmessung (iii) nur zu Beginn des Verfahrens zu Kalibrationszwecken durchgeführt wird, während im laufenden Betrieb die Messung der an den Richtrollen angreifenden Kräfte zur Durchführung des erfindungsgemäßen Verfahrens genügt.The measurement (iii) of the position of the material is carried out as described conveniently after each of the straightening rollers by measuring the deviation of the material from the throughput axis in the direction of the straightening rollers. For this purpose, known optical or contactless (e.g. magnetic) Measuring method in question. This also applies to the appropriate measurement of the vibrations occurring in the wire material passing through, the measured value of which is also entered into the model controlling the adjustment of the adjustable straightening rollers. It is conceivable that the position measurement (iii) is only carried out at the beginning of the process for calibration purposes, while during operation the measurement of the forces acting on the straightening rollers is sufficient to carry out the method according to the invention.

Vorteilhaft werden zwei wie oben erwähnte Dressurvorrichtungen hintereinander vom Material durchlaufen, wobei eine Dressurvorrichtung horizontal angeordnete Richtrollen und die andere vertikal angeordnete Richtrollen aufweist.Advantageously, the material passes through two dressing devices as mentioned above one after the other, one dressing device having horizontally arranged straightening rollers and the other having vertically arranged straightening rollers.

Die Erfindung betrifft im übrigen eine Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens mit einer Dressurvorrichtung mit zwei einander gegenüber längsversetzt angeordneten Reihen von antriebslosen Richtrollen, die im Betrieb an einem zwischen den Reihen durchlaufenden Draht angreifen, um diesen geradezurichten, wobei einige Richtrollen abhängig von einem Modell automatisch gesteuert so an das Material anstellbar sind, dass die Anforderungen an die Geradheit des aus der Dressurvorrichtung austretenden Materials erfüllt sind, wobei das Modell anhand von eingegebenen Eingangsdaten des Drahtes und von in der Dressurvorrichtung erfassten Daten der Dressurvorrichtung und des Materials stochastisch ermittelt ist. Eine derartige Vorrichtung ist in der eingangs zitierten DE-A erwähnt.The invention also relates to a device for carrying out the method according to the invention with a dressing device with two rows of driveless straightening rollers arranged longitudinally offset from one another, which during operation act on a wire running between the rows in order to straighten it, whereby some straightening rollers can be automatically adjusted to the material depending on a model so that the requirements for the straightness of the material emerging from the dressing device are met, whereby the model is determined stochastically based on input data of the wire and data of the dressing device and the material recorded in the dressing device. Such a device is mentioned in the DE-A cited at the beginning.

Die Erfindung besteht bei einer solchen Vorrichtung darin, dass die zuerst auf das Material einwirkenden Richtrollen der einen Reihe feststehende Achsen haben und die anschließend an derselben Seite des Materials angreifende Richtrolle einzeln für sich an das durchlaufenden Material anstellbar ist, und dass die Richtrollen der gegenüberliegenden Reihe alle an das Material anstellbar sind, wobei die zuerst auf das Material einwirkenden Richtrollen dieser Reihe gemeinsam und die anschließend am Material angreifende Richtrolle derselben Reihe einzeln für sich anstellbar sind bzw. ist, und wobei die Größe und Richtung der an den Richtrollen angreifenden Kräfte mittels an diesen selbst angeordneten Messeinrichtungen, wie z.B. Dehnungsmessstreifen, und/oder die Temperatur des Materials mittels am Eingang und Ausgang der Dressurvorrichtung angeordneter Messeinrichtungen messbar sind bzw. ist, und/oder wobei Mittel zu Messung der Position des Materials im Anschluss an jede der Richtrollen in Form der Abweichung des Materials von der Durchlaufachse in bzw. parallel zur Anstellrichtung der Richtrollen vorgesehen sind, wobei alle erhaltenen Messwerte dem das Anstellen der anstellbaren Richtrollen steuernden Modell zuführbar sind.The invention of such a device consists in that the straightening rollers of one row, which first act on the material, have fixed axes and the ones subsequently the straightening roller acting on the same side of the material can be adjusted individually to the material passing through, and that the straightening rollers of the opposite row can all be adjusted to the material, whereby the straightening rollers of this row which act on the material first can be adjusted together and the straightening roller of the same row which then acts on the material can be adjusted individually, and whereby the magnitude and direction of the forces acting on the straightening rollers can be measured by means of measuring devices arranged on these themselves, such as strain gauges, and/or the temperature of the material can be measured by means of measuring devices arranged at the inlet and outlet of the dressing device, and/or whereby means are provided for measuring the position of the material following each of the straightening rollers in the form of the deviation of the material from the passage axis in or parallel to the adjustment direction of the straightening rollers, whereby all measured values obtained can be fed to the model which controls the adjustment of the adjustable straightening rollers.

In einer alternativen Ausführungsform der Erfindung ist die Temperatur des Materials im Anschluss an eine oder mehrere Richtrollen mittels dort jeweils angeordneter Messeinrichtungen messbar, wobei ebenfalls alle erhaltenen Messwerte dem das Anstellen der anstellbaren Richtrollen steuernden Modell zuführbar sind.In an alternative embodiment of the invention, the temperature of the material downstream of one or more straightening rollers can be measured by means of measuring devices arranged there, wherein all measured values obtained can also be fed to the model controlling the adjustment of the adjustable straightening rollers.

Die Erfindung wird anhand der Zeichnung näher erläutert, worin Fig. 1 eine Dressurvorrichtung mit einem durch diese laufenden Draht, Fig. 2 dieselbe Dressurvorrichtung mit angedeuteten Messstellen der an den einzelnen Richtrollen auftretenden Kräfte und der Drahttemperatur und Fig. 3 eine Richtrolle mit daran angeordnetem Dehnungsmessstreifen zeigt.The invention is explained in more detail with reference to the drawing, in which Fig.1 a training device with a wire running through it, Fig.2 the same dressage device with indicated measuring points of the forces occurring at the individual straightening rollers and the wire temperature and Fig.3 a straightening roller with a strain gauge attached to it.

Die Dressurvorrichtung der Fig. 1 und 2 besitzt zwei gegeneinander horizontal versetzt angeordnete Reihen horizontaler Richtrollen 3, 4, 6, 10. Eine Reihe greift am zu richtenden Draht unten und die andere Reihe am zu richtenden Draht oben an. Das zu richtende Material 1 kann auch Bandmaterial (nicht gezeigt) sein; im folgenden wird mit dem Ausdruck Material der Draht oder Bandmaterial bezeichnet. Die Richtrollen 3, 4, 6, 10 haben keinen Drehantrieb, die Dressurvorrichtung wird vom Draht als Material 1 durchlaufen, der durch nicht gezeigte Vorschubrollen in Richtung des Pfeiles 2 bewegt wird. Normalerweise durchläuft der Draht hintereinander zwei zueinander jeweils um 90° versetzte Dressurvorrichtungen, wobei eine Dressurvorrichtung horizontale Richtrollen und die andere Dressurvorrichtung vertikale Richtrollen aufweist. Der Hauptarbeitsbereich der Erfindung umfasst Drahtdurchmesser zwischen etwa 4 mm und etwa 20 mm.The training device of the Fig.1 and 2 has two rows of horizontal straightening rollers 3, 4, 6, 10 arranged horizontally offset from one another. One row engages the wire to be straightened at the bottom and the other row engages the wire to be straightened at the top. The material 1 to be straightened can also be strip material (not shown); in the following, the term material refers to the wire or strip material. The straightening rollers 3, 4, 6, 10 have no rotary drive, the wire passes through the dressing device as material 1, which is moved in the direction of arrow 2 by feed rollers (not shown). Normally, the wire passes through two dressing devices one after the other, each offset by 90° to one another, with one dressing device having horizontal straightening rollers and the other dressing device having vertical straightening rollers. The main working range of the invention covers wire diameters between about 4 mm and about 20 mm.

Die ersten beiden Richtrollen 3 der in den Fig. 1 und 2 unteren Reihe haben feststehende Drehachsen. Die an diese anschließende untere Richtrolle 4 ist mittels einer bei 5 angedeuteten Stellvorrichtung einzeln für sich an das durchlaufende Material 1 anstellbar. Die drei ersten Richtrollen 6 der oberen Reihe sind gemeinsam an das Material 1 anstellbar und sind zu diesem Zweck auf einem gemeinsamen Träger 7 gelagert, der mittels eines Hebels 8 durch einen Stellmotor 9 höhenverstellbar ist. Die an die oberen Richtrollen 6 anschließende obere Richtrolle 10 ist mittels einer bei 11 angedeuteten Stellvorrichtung einzeln für sich an das Material anstellbar.The first two straightening rollers 3 of the Fig.1 and 2 lower row have fixed axes of rotation. The lower straightening roller 4 connected to this can be individually adjusted to the material 1 passing through by means of an adjusting device indicated at 5. The first three straightening rollers 6 of the upper row can be adjusted together to the material 1 and for this purpose are mounted on a common carrier 7, the height of which can be adjusted by means of a lever 8 by a servomotor 9. The upper straightening roller 10 connected to the upper straightening rollers 6 can be individually adjusted to the material by means of an adjusting device indicated at 11.

Fig. 2 veranschaulicht die mit f bezeichneten Messungen der verschiedenen an den einzelnen Richtrollen angreifenden Kräfte sowie die Temperaturmessungen am Material 1 vor und nach dem Durchgang durch die Anordnung der Richtrollen. Im allgemeinen erwärmt sich das Material 1 beim Richten durch eine Richtrollengarnitur. Die Temperaturmesseinrichtungen sind bei den Punkten 16 angedeutet. Die Temperaturmessung kann auch am Ausgang jeder der Richtrollen 3, 4, 6, 10 erfolgen. Fig.2 illustrates the measurements of the various forces acting on the individual straightening rollers, designated f, as well as the temperature measurements on the material 1 before and after passing through the arrangement of straightening rollers. In general The material 1 is heated during straightening by a set of straightening rollers. The temperature measuring devices are indicated at points 16. The temperature measurement can also be carried out at the output of each of the straightening rollers 3, 4, 6, 10.

Die im Anschluss an jede der Richtrollen 3, 4, 6, 10 angeordneten Messeinrichtungen zur Feststellung der Position des Drahtes sind in Fig. 2 nicht eingezeichnet. Es handelt sich dabei um bekannte optische oder magnetische Messeinrichtungen, welche die Abweichung des Materials 1 von der Durchlaufachse in bzw. parallel zur Anstellrichtung der Richtrollen 6, 4, 10, d.h. im dargestellten Fall in der Vertikalrichtung, messen. Nicht eingezeichnet ist auch eine Vibrationsmesseinrichtung, welche die im Fall des Geraderichtens geriffelter Drähte am Draht auftretenden Vibrationen misst, um die daraus resultierenden Störgrößen zu eliminieren.The measuring devices arranged after each of the straightening rollers 3, 4, 6, 10 for determining the position of the wire are in Fig.2 not shown. These are known optical or magnetic measuring devices which measure the deviation of the material 1 from the throughput axis in or parallel to the direction of adjustment of the straightening rollers 6, 4, 10, ie in the case shown in the vertical direction. Also not shown is a vibration measuring device which measures the vibrations occurring on the wire when straightening corrugated wires in order to eliminate the resulting disturbances.

Alle erwähnten Messgrößen werden in das die Anstellung der anstellbaren Richtrollen 6, 4, 10 steuernde Modell eingegeben.All mentioned measured values are entered into the model controlling the adjustment of the adjustable straightening rollers 6, 4, 10.

Fig. 3 zeigt eine Richtrolle 13 in einem größeren Maßstab mit an ihrem Lagerbolzen 12 in jeweils einer Nut 15 angeordneten Dehnungsmessstreifen 17. Für eine verbesserte Messung von Kräften und Kraftrichtungen, die auf eine Rolle wirken, sind bis zu vier Dehnungsmessstreifen 17 im Lagerbolzen 12 einer Richtrolle vorgesehen. Dabei sind die Dehnungsmessstreifen 17 parallel zueinander im Lagerbolzen 12 angeordnet. Sie sind ferner um die Achse des Lagerbolzens 12 herum in Viertelkreisabständen (um 90° versetzt) angeordnet. Anstatt der Dehnungsmesstreifen 17, die den Vorteil haben, einfach aufgebaut und ausreichend messgenau zu sein, können andere Druck- oder Biegungsmesssensoren in oder an den Lagerbolzen 12 verwendet werden, z.B. ebenso einfach aufgebaute Piezosensoren. Fig.3 shows a straightening roller 13 on a larger scale with strain gauges 17 arranged on its bearing bolt 12 in a groove 15. For improved measurement of forces and force directions acting on a roller, up to four strain gauges 17 are provided in the bearing bolt 12 of a straightening roller. The strain gauges 17 are arranged parallel to one another in the bearing bolt 12. They are also arranged around the axis of the bearing bolt 12 at quarter-circle intervals (offset by 90°). Instead of the strain gauges 17, which have the advantage of being simple in design and sufficiently accurate, other pressure or bending measuring sensors can be used in or on the bearing bolt 12, e.g. piezo sensors with an equally simple design.

Claims (7)

  1. A method for straightening wire or strip material by means of a dressing device comprising straightening rollers (3, 4, 6, 10) engaging on opposite sides of the passing-through material (1) in an offset manner, of which, some are automatically activated according to a model which has been stochastically determined on the basis of input data of the material (1) and data of the material (1) and of the dressing device determined by the dressing device during the passing of the material through the dressing device such that requirements for straightness are met, wherein the position of at least one straightening roller is continuously adapted on the basis of said data recorded during the passage through the dressing device, which data are representative of the target straightness, characterized in that
    (i) the size and direction of the forces engaging the straightening rollers (3, 4, 6, 10) on the straightening rollers themselves and/or
    (ii) the temperature of the material (1) before and after passing through the arrangement of straightening rollers (3, 4, 6, 10) and/or
    (iii) the position of the material (1) subsequent to each of the straightening rollers in the form of the deviation of the material (1) from the pass-through axis in or parallel to the adjusting direction of the straightening rollers (3, 4, 6, 10) is measured and the measured values obtained are entered into the model controlling the adjustment of the adjustable straightening rollers (6, 4, 10).
  2. The method according to claim 1, characterized in that the temperature of the wire or the strip material is measured at the output of each straightening roller (3, 4, 6, 10).
  3. The method according to claim 1 or 2, characterized in that the forces engaging the straightening rollers (3, 4, 6, 10) are measured by means of strain gauges (17) arranged on the bearing bolts (12) of the straightening rollers (3, 4, 6, 10), which strain gauges measure the bending moments in the axial, vertical, and/or horizontal direction.
  4. The method according to any of claims 1 to 3, characterized in that vibrations occurring on the wire or strip material passing through are also measured and the measured value is likewise entered into the model controlling the adjustment of the adjustable straightening rollers (4, 6, 10).
  5. The method according to any of claims 1 to 4, characterized in that the wire or strip material passes through two dressing devices in succession, wherein one dressing device has horizontally arranged straightening rollers (3, 4, 6, 10) and the other has vertically arranged straightening rollers.
  6. A device for implementing the method for straightening wire or strip material according to any of claims 1 to 5, comprising a dressing device with two rows of non-driven straightening rollers (3, 4, 6, 10) arranged longitudinally offset as relates to one another, which straightening rollers, during operation, engage a material (1) passing between the rows in order to straighten said material, wherein some straightening rollers (6, 4, 10) are automatically controllably adjustable to the material (1) depending on a model such that the requirements for straightness of the material exiting from the dressing device are met, wherein the model has been stochastically determined on the basis of entered input data of the material (1) and on the basis of data of the dressing device and of the material recorded in the dressing device, characterized in that the straightening rollers (3) of the row first acting on the material (1) have fixed axes and in that the straightening roller (4) subsequently engaging the material (1) on the same side is individually adjustable to the passing-through material (1), and in that the straightening rollers (6, 10) of the opposite row are all adjustable to the material (1), wherein the straightening rollers (6) of this row first acting on the material (1) are jointly adjustable and the straightening roller (10) of the same row subsequently engaging the material (1) is individually adjustable, and wherein the size and direction of the forces engaging the straightening rollers (3, 4, 6, 10) are measurable by means of measuring devices arranged on these themselves, such as strain gauges (17), and/or the temperature of the material (1) is measurable by means of measuring devices (16) arranged at the input and output of the dressing device, and/or wherein means for measuring of the position of the material (1) subsequent to each of the straightening rollers in the form of the deviation of the material (1) from the pass-through axis in or parallel to the adjusting direction of the straightening rollers (3, 4, 6, 10) are provided, wherein all obtained measured values can be supplied to the model controlling the adjustment of the adjustable straightening rollers (6, 4, 10).
  7. The device according to claim 6, characterized in that the temperature of the material (1) subsequent to one or several straightening rollers (3, 4, 6, 10) is measurable by means of measuring devices respectively arranged there, wherein likewise all obtained measured values can be supplied to the model controlling the adjustment of the adjustable straightening rollers (6, 4, 10).
EP20754611.0A 2019-02-28 2020-01-28 Method and device for straightening wire or strip material Active EP3930940B1 (en)

Applications Claiming Priority (2)

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ATA77/2019A AT522234B1 (en) 2019-02-28 2019-02-28 Method and device for straightening wire or strip material
PCT/AT2020/000001 WO2020172694A2 (en) 2019-02-28 2020-01-28 Method and device for straightening wire or strip material

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JP (1) JP2022521767A (en)
KR (1) KR20210132683A (en)
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AT (1) AT522234B1 (en)
BR (1) BR112021013352A2 (en)
CA (1) CA3125331A1 (en)
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AT524979A1 (en) 2021-04-27 2022-11-15 Evg Entwicklungs U Verwertungs Ges M B H Wire straightening machine and method of straightening wire or strip material
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CN116618479B (en) * 2023-07-19 2023-09-22 常州三协电机股份有限公司 Screw rod straightening device

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WO2020172694A2 (en) 2020-09-03
WO2020172694A3 (en) 2020-11-12
KR20210132683A (en) 2021-11-04
AT522234A1 (en) 2020-09-15
TW202100262A (en) 2021-01-01
CN113382812B (en) 2023-08-29
TWI732455B (en) 2021-07-01
CN113382812A (en) 2021-09-10
EP3930940A2 (en) 2022-01-05
US20220143677A1 (en) 2022-05-12
CA3125331A1 (en) 2020-09-03
BR112021013352A2 (en) 2021-09-14
IL285670A (en) 2021-10-31
JP2022521767A (en) 2022-04-12
ZA202104559B (en) 2022-07-27
AT522234B1 (en) 2022-05-15

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