EP0988904A2 - Method and device for measuring the flatness of strips - Google Patents

Method and device for measuring the flatness of strips Download PDF

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Publication number
EP0988904A2
EP0988904A2 EP99116003A EP99116003A EP0988904A2 EP 0988904 A2 EP0988904 A2 EP 0988904A2 EP 99116003 A EP99116003 A EP 99116003A EP 99116003 A EP99116003 A EP 99116003A EP 0988904 A2 EP0988904 A2 EP 0988904A2
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EP
European Patent Office
Prior art keywords
measuring
strip
braking force
flatness
tension
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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
EP99116003A
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German (de)
French (fr)
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EP0988904B1 (en
EP0988904A3 (en
Inventor
Rolf Dipl.-Ing. Noé
Andreas Dr. mont Dipl.-Ing. Noé
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BWG Bergwerk und Walzwerk Maschinenbau GmbH
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BWG Bergwerk und Walzwerk Maschinenbau GmbH
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Publication of EP0988904A2 publication Critical patent/EP0988904A2/en
Publication of EP0988904A3 publication Critical patent/EP0988904A3/en
Application granted granted Critical
Publication of EP0988904B1 publication Critical patent/EP0988904B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips

Definitions

  • the invention relates to a method for flatness measurement of strips, in particular metal strips, as they pass through of strip processing plants, rolling mills, for example or the like, after which the continuous belt with a predetermined strip tension is applied, and then by means of at least one in a measuring range in a predetermined Distance from the belt surface arranged measuring device Belt unevenness can be detected.
  • Such a method is the subject of, for example DE-PS 28 13 719. Is also comparable in DE-OS 42 24th 569 procedures.
  • Both previously known teachings have in common that an indirect measurement of the flatness of the strip Measurement of the band tension distribution over the bandwidth with Flatness measuring rollers are used.
  • the band tension distribution allows conclusions to be drawn about the flatness of the band.
  • a Deflection of the continuous band in the measuring direction with With the help of a power transmission device.
  • the Deflection measured and from this deduced the band flatness.
  • the aforementioned measuring methods work as it were indirectly because of different deflections of the band Differences in length of individual longitudinal fibers correspond, from which inferred the flatness of the volume becomes.
  • flatness measuring rollers only have a limited accuracy exhibit.
  • the longitudinal tension of the strip can be adjusted only with an accuracy of approx. 2 to 5 Determine MPa, which leads to corresponding uncertainties in the Accuracy of the flatness measurement leads. Otherwise find Cross tensions in the band no precipitation, which also affect the flatness. It must also be taken into account that even with a flat band influences from neighboring ones Deflection rollers, drive rollers or from the winding process influence the longitudinal stress distribution over the bandwidth.
  • the invention is based on the technical problem Method for measuring flatness of strips of the type described at the beginning Training to develop so that without Production loss - as it were online - a reliable one and exact flatness measurement can be achieved. Moreover a corresponding device is to be created.
  • the invention proposes generic method that the tape tensile force in and / or immediately before the measuring range by a predetermined one Measure and consequently is specifically reduced to tape-related Flatness measurement errors (mostly) to be able to exclude.
  • the continuous belt usually before and / or in the measuring range in comparison directed essentially opposite to the belt tensile force Braking force applied, the braking force in terms of amount almost corresponds to the belt tension.
  • - At a Belt treatment plant is within the scope of the invention around every conceivable device that is used for transport, for treatment, coating, etc. of a continuous Band is suitable.
  • the one required to transport the tape Tension or the associated belt tension becomes regular of train drivers or a set of traction rollers and one Brake roller set applied. Is under the belt surface in the present case the band top surface and / or the band bottom surface - in contrast to the strip cross-sectional area - to understand.
  • the continuous belt is preferably at least one before, after and / or in the measuring range and possibly at least a further deflection roller arranged after the measuring range led, the upstream of the measuring range Deflection roller can be designed as a tension measuring roller and for Determination of the tape tension in the measuring range is used. It leaves the tape tensile force in the measuring range is more preferred Regulate embodiment of the invention.
  • the input variable from the tension measuring roller determined tape tensile force used in the measuring range corresponding control signals to a Brake power device are transmitted.
  • a control system is required for this purpose Signals ensures and the evaluation of the tension measuring roller recorded measured values.
  • any other measuring device on the input side of the measuring range or within can come as long as this measuring device to determine the tape tension or the tape tension is suitable.
  • this measuring device to determine the tape tension or the tape tension is suitable.
  • the belt tension or the associated belt tension can easily build the braking force accordingly or adjust. This is done in such a way that the braking force amounts almost equal to the belt tension, see above that the continuous belt is almost draft-free in the measuring range.
  • braking forces are used here, which are in correspond to about 98, 99% of the belt tension.
  • a particularly preferred embodiment of the invention with independent meaning is characterized in that the Brake force device the continuous band with the Belt tension force opposing braking force without contact acted upon.
  • the braking force device over Frictional forces the corresponding braking force in the continuous Enter tape like this z. B. by means of a S-roll set succeeds.
  • the contactless application of braking force is generally by means of at least one linear motor made, such as in the German Patent application 197 19 994.1-32 is described which is expressly referred to. If additional the measuring device still detects tape unevenness, maximum overall protection of the belt is achieved. The risk of belt surface damage is excluded.
  • the measuring device works in the vertical direction compared to the continuous belt, namely across its entire range.
  • the can of the Measuring device determined flatness values as input variables (Actual values) fed into a flatness control system be, connected actuators for control according to the flatness (after a target / actual value comparison) to be influenced. That said, it can basically proceed as described in the above DE-OS 42 24 569 is described.
  • the invention also relates to a device for Flatness measurement of strips, especially metal strips, with at least one device for loading the continuous belt with a predetermined belt tension and with at least one in a measuring range in a predetermined Distance from the belt surface arranged measuring device for the detection of band flatness, which is characterized by a special functional and simple design.
  • This device is characterized in that before that and / or in the measuring range a braking force device for targeted reduction in belt tension and application a braking force is arranged.
  • the braking device can work as at least a non-contact Be linear motor. But there is also the possibility that the braking force device from S-roller sets as well as pressure and drive rollers.
  • Such a device for Flatness measurement can also be used in rolling mills like with straightening systems or winding processes.
  • a device for measuring flatness of strips 1, according to the exemplary embodiment metal strips 1, is shown in the figures.
  • the continuous belt 1 is subjected to a predetermined belt tensile force F Z , which is applied via a pull roller set 2 and a brake roller set 3.
  • the arrangement may be made in principle as it is shown in DE-OS 39 12 676 or DE-OS 26 25 414 (see FIG. 2).
  • the required belt tensile force F Z is generated in a contactless manner by means of a linear motor 4 or more or a series of linear motors.
  • this linear motor 4 has a stator or inductor 5 and an armature 1.
  • This armature 1 is the metal strip 1.
  • the metal strip 1 moves over the linear motor 4, which can generate tension and / or pressure in the metal strip 1.
  • the stator 5 has coils arranged next to one another in slots between transverse teeth.
  • This measuring range M is designed as a vertical measuring section, with its Length essentially corresponds to the maximum bandwidth.
  • the measuring device 6 is at a predetermined distance A from the Belt surface arranged and detected belt unevenness.
  • the strip tensile force F Z is deliberately reduced in order to be able to rule out strip tension-related errors in the flatness measurement.
  • a braking force B which is opposite to the strip tensile force F Z.
  • This braking force B is applied by a braking force device 7.
  • This braking force device 7, according to the exemplary embodiment in FIG. 1, is a linear motor 7, while in the exemplary embodiment according to FIG. 2, two S-roller sets 7a, 7b are provided.
  • the braking force device 7 is arranged within the measuring range M, while, as shown in FIG. 2, an arrangement in front of it (and behind it) is tracked. Mixed forms are of course also conceivable.
  • the linear motor 7 operates contactlessly and generates the braking force B at this point in such a way that the metal strip 1 is acted upon by a continuous field which is directed in the opposite direction to the linear motor 4.
  • the belt tensile force F Z and braking force B are directed in opposite directions, as the associated force vectors make clear in the figures.
  • angular positions are also within the scope of the invention, in which case the actually acting braking force B is measured on the basis of the horizontal component B H lying in the direction of the strip tension or the direction of the force of the strip, as is indicated in FIG. 1.
  • B V here designates the corresponding vertical component of the braking force B.
  • the above illustration also makes it clear that the braking force B (or B H ) and the belt tensile force F Z are of almost equal magnitude.
  • the continuous strip or metal strip 1 is guided over at least one deflection roller 8 arranged in front of or in the measuring area M.
  • a further deflection roller 9 arranged after the measuring range M can be provided. This also applies to the deflection roller 10 which is also realized within the measuring range.
  • the deflection roller 8 upstream of the measuring range M is designed as a tension measuring roller 8 and is used to determine the tape tensile force F Z within the measuring range M.
  • a control system 11 is also provided, to which the tension measuring roller 8 upstream of the measuring range M is connected.
  • the aforementioned tension measuring roller 8 supplies actual values of the tape tension F Z to the aforementioned control system 11, which influences the braking force device 7 accordingly in order to control the braking force B and to set the desired tape tension F Z in the measuring range M.
  • the braking force device 7 is connected to the control system 11 and derived default values are applied to it.
  • control system 11 controls the electrical power supplied to the respectively associated stator 5 of the linear motor 7 and thus the braking force B.
  • the direction of the current flow can also generally be influenced in this way, although in the present case it is always chosen such that the braking force B is directed counter to the belt tensile force F Z.
  • the measuring device 6 is as shown Representation around a CCD camera. Of course it is on a laser-optical distance meter is also conceivable at this point. In the same way, inductive or capacitive Sensors are used. Moiré processes can also be used for flatness measurement.
  • the measuring device 6 in the vertical direction V compared to continuous band 1 with a predetermined distance A above arranged the band surface and works according to the embodiment contactless.
  • flatness measuring rollers conceivable, although not preferred.
  • the braking force B is applied via local S-roller sets 7a, 7b with associated pressure rollers 12.
  • These S-roller sets 7a, 7b can in principle be driven at different speeds, so that the desired reduction in the belt tensile force F Z or the application of the braking force B can be represented without problems. This is usually done via the respective S-roller sets 7a, 7b associated gearboxes with speed control, which are not shown in detail.
  • the appropriate curvature of the roll cover as a function of the measurement device 6 measured values are carried out. That is, as part of the The invention is based on the exemplary embodiment in FIG. 2 an additional control device or flatness control system 14 provided, which the bulging the S-roll 13 in the S-roll set 7b, and depending on the determined by the measuring device 6 Flatness measurements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

The front tension force (Fz) is reduced before and/or in the measuring region (M) to be able to exclude errors caused by the front tension during planarity measurements. Process for measuring the planarity of metal strips (1) during the course of passing the strip through a strip treatment plant or rolling mill comprises applying a prescribed tension force (Fz) to the strip passing through the mill of treatment plant, and detecting strip irregularities using a measuring device (6) arranged in the measuring region (M) at a prescribed distance (A) from the strip surface. The front tension force (Fz) is reduced before and/or in the measuring region (M) to be able to exclude errors caused by the front tension during planarity measurements. An Independent claim is also included for an apparatus for measuring the planarity of metal strips during the course of passing the strip through a strip treatment plant or rolling mill.

Description

Die Erfindung betrifft ein Verfahren zur Planheitsmessung von Bändern, insbesondere Metallbändern, im Zuge des Durchlaufens von beispielsweise Bandbehandlungsanlagen, Walzwerken oder dergleichen, wonach das durchlaufende Band mit einer vorgegebenen Bandzugkraft beaufschlagt wird, und wonach mittels zumindest einer in einem Meßbereich in vorgegebenem Abstand von der Bandoberfläche angeordneten Meßvorrichtung Bandunplanheiten detektiert werden.The invention relates to a method for flatness measurement of strips, in particular metal strips, as they pass through of strip processing plants, rolling mills, for example or the like, after which the continuous belt with a predetermined strip tension is applied, and then by means of at least one in a measuring range in a predetermined Distance from the belt surface arranged measuring device Belt unevenness can be detected.

Ein derartiges Verfahren ist beispielsweise Gegenstand der DE-PS 28 13 719. Vergleichbar wird auch in der DE-OS 42 24 569 verfahren. Beiden vorbekannten Lehren ist gemein, daß gleichsam eine indirekte Messung der Bandplanheit durch Messung der Bandspannungsverteilung über die Bandbreite mit Hilfe von Planheitsmeßrollen erfolgt. Die Bandspannungsverteilung läßt dabei Rückschlüsse auf die Bandplanheit zu. Insbesondere bei der erstgenannten Schrift erfolgt eine Auslenkung des durchlaufenden Bandes in Meßrichtung mit Hilfe einer Kraftübertragungseinrichtung. Dabei wird die Auslenkung gemessen und hieraus auf die Bandplanheit geschlossen. Die vorgenannten Meßmethoden arbeiten gleichsam indirekt, weil unterschiedliche Auslenkungen des Bandes zu Längenunterschieden einzelner Bandlängsfasern korrespondieren, aus denen auf die Planheit des Bandes rückgeschlossen wird.Such a method is the subject of, for example DE-PS 28 13 719. Is also comparable in DE-OS 42 24th 569 procedures. Both previously known teachings have in common that an indirect measurement of the flatness of the strip Measurement of the band tension distribution over the bandwidth with Flatness measuring rollers are used. The band tension distribution allows conclusions to be drawn about the flatness of the band. In the case of the first-mentioned font in particular, a Deflection of the continuous band in the measuring direction with With the help of a power transmission device. The Deflection measured and from this deduced the band flatness. The aforementioned measuring methods work as it were indirectly because of different deflections of the band Differences in length of individual longitudinal fibers correspond, from which inferred the flatness of the volume becomes.

Unabhängig davon kennt man die direkte Messung der Bandplanheit an einer Tafel oder einem Band im Stillstand, das heißt im zugentlasteten Zustand. Derartiges ist für zumeist kontinuierliche Bandbehandlungsanlagen inakzeptabel, weil mit Produktionsunterbrechungen verbunden.Regardless of this, the direct measurement of the strip flatness is known on a blackboard or a tape at a standstill in the strain-relieved state. This is usually the case continuous strip processing lines unacceptable because associated with production interruptions.

Hinzu kommt, daß Planheitsmeßrollen nur eine begrenzte Genauigkeit aufweisen. Beispielsweise läßt sich die Bandlängszugspannung nur mit einer Genauigkeit von ca. 2 bis 5 MPa ermitteln, was zu entsprechenden Unsicherheiten bei der Genauigkeit der Planheitsmessung führt. Im übrigen finden Querspannungen im Band keinen Niederschlag, welche sich ebenfalls auf die Planlage auswirken. Ferner ist zu berücksichtigen, daß selbst bei planem Band Einflüsse von benachbarten Umlenkrollen, Treibrollen oder vom Aufwickelprozeß die Bandlängsspannungsverteilung über der Bandbreite beeinflussen.In addition, flatness measuring rollers only have a limited accuracy exhibit. For example, the longitudinal tension of the strip can be adjusted only with an accuracy of approx. 2 to 5 Determine MPa, which leads to corresponding uncertainties in the Accuracy of the flatness measurement leads. Otherwise find Cross tensions in the band no precipitation, which also affect the flatness. It must also be taken into account that even with a flat band influences from neighboring ones Deflection rollers, drive rollers or from the winding process influence the longitudinal stress distribution over the bandwidth.

Für die direkte Messung der Bandplanheit im Stillstand gilt darüber hinaus, daß praktisch nur ein Ausschnitt des Bandes erfaßt wird. Außerdem lassen sich ggf. Stillstandsmarkierungen von angestellten Rollen nicht immer zuverlässig vermeiden. - Hier will die Erfindung insgesamt Abhilfe schaffen.The following applies to the direct measurement of the strip flatness at standstill moreover, that practically only a section of the volume is detected. In addition, standstill markings can be made if necessary Avoid reliable avoidance of roles. - The invention as a whole wants to remedy this.

Der Erfindung liegt das technische Problem zugrunde, ein Verfahren zur Planheitsmessung von Bändern der eingangs beschriebenen Ausgestaltung so weiterzubilden, daß ohne Produktionsausfall - gleichsam On-Line - eine zuverlässige und genaue Planheitsmessung erreicht werden kann. Außerdem soll eine entsprechende Vorrichtung geschaffen werden.The invention is based on the technical problem Method for measuring flatness of strips of the type described at the beginning Training to develop so that without Production loss - as it were online - a reliable one and exact flatness measurement can be achieved. Moreover a corresponding device is to be created.

Zur Lösung dieser Aufgabe schlägt die Erfindung bei einem gattungsgemäßen Verfahren vor, daß die Bandzugkraft in und/oder unmittelbar vor dem Meßbereich um ein vorgegebenes Maß und folglich gezielt verringert wird, um bandzugbedingte Fehler bei der Planheitsmessung (größtenteils) ausschließen zu können. Dabei wird das durchlaufende Band üblicherweise vor und/oder im Meßbereich mit einer im Vergleich zur Bandzugkraft im wesentlichen entgegengesetzt gerichteten Bremskraft beaufschlagt, wobei die Bremskraft betragsmäßig nahezu der Bandzugkraft entspricht. - Bei einer Bandbehandlungsanlage handelt es sich im Rahmen der Erfindung um jede denkbare Vorrichtung, welche zum Transport, zur Behandlung, zur Beschichtung usw. eines durchlaufenden Bandes geeignet ist. Der zum Transport des Bandes erforderliche Zug bzw. die zugehörige Bandzugkraft wird regelmäßig von Zugtreibern bzw. einem Zugrollensatz sowie einem Bremsrollensatz aufgebracht. Unter der Bandoberfläche ist vorliegend die Bandobentläche und/oder die Banduntenfläche - im Gegensatz zur Bandquerschnittsfläche - zu verstehen.To achieve this object, the invention proposes generic method that the tape tensile force in and / or immediately before the measuring range by a predetermined one Measure and consequently is specifically reduced to tape-related Flatness measurement errors (mostly) to be able to exclude. The continuous belt usually before and / or in the measuring range in comparison directed essentially opposite to the belt tensile force Braking force applied, the braking force in terms of amount almost corresponds to the belt tension. - At a Belt treatment plant is within the scope of the invention around every conceivable device that is used for transport, for treatment, coating, etc. of a continuous Band is suitable. The one required to transport the tape Tension or the associated belt tension becomes regular of train drivers or a set of traction rollers and one Brake roller set applied. Is under the belt surface in the present case the band top surface and / or the band bottom surface - in contrast to the strip cross-sectional area - to understand.

Durch diese Maßnahmen der Erfindung wird erreicht, daß im Meßbereich quasi-stationäre Bedingungen vorliegen, das heißt das durchlaufende Band kaum (merklich) mit Zug beaufschlagt wird. Dementsprechend sind Verfälschungen durch die anliegende Bandzugkraft praktisch ausgeschlossen. Dieses gilt sowohl mit Blick auf nunmehr erfaßbare Querspannungen als auch im Hinblick auf Meßfehler bei der Ermittlung der Spannungsverteilung. Denn durch den an dieser Stelle praktisch nicht mehr vorhandenen Bandzug wird weder eine nicht gegebene Planheit vorgetäuscht noch findet ein Ausgleich von vorhandenen Querspannungen statt. Im übrigen wird auf eine Auslenkung des Bandes zur Messung der Bandplanheit unter Bandzug bewußt verzichtet, was insbesondere bei dünnen Bändern und hier im Randbereich von Vorteil ist. Ferner wird die Prozeßgeschwindigkeit praktisch nicht beeinflußt, weil das durchlaufende Band nur innerhalb eines definierten kurzen Bereiches (Meßbereich) abgebremst wird und danach mit ggf. beschleunigter Geschwindigkeit einen Weitertransport erfährt. Schließlich lassen sich Stillstandsmarkierungen von angestellten Andrück- oder Treiberrollen auf der Bandoberfläche zuverlässig ausschließen.By these measures of the invention it is achieved that in Measuring range quasi-stationary conditions are present the running belt is hardly (noticeably) subjected to train becomes. Accordingly, falsifications by the adjacent belt tension practically excluded. This applies both with a view to transverse voltages that can now be detected as well as with regard to measurement errors in determining the Stress distribution. Because by the practical at this point no longer existing belt tension is neither a not given flatness is faked still finds a compensation of existing transverse stresses instead. For the rest, is on a deflection of the band to measure the flatness of the band deliberately avoided under belt tension, which is particularly the case with thin ones Bands and here in the edge area is an advantage. Further the process speed is practically not affected, because the continuous band only within a defined short range (measuring range) is braked and then Further transport at an accelerated speed if necessary experiences. Finally, standstill marks of employed pressure or driver roles on the Exclude the belt surface reliably.

Vorzugsweise wird das durchlaufende Band über zumindest eine vor, nach und/oder in dem Meßbereich und ggf. zumindest eine weitere nach dem Meßbereich angeordnete Umlenkrolle geführt, wobei die dem Meßbereich vorgeordnete Umlenkrolle als Zugmeßrolle ausgebildet sein kann und zur Bestimmung der Bandzugkraft im Meßbereich dient. Dabei läßt sich die Bandzugkraft im Meßbereich nach weiter bevorzugter Ausführungsform der Erfindung regeln. In diesem Zusammenhang wird als Eingangsgröße üblicherweise die von der Zugmeßrolle ermittelte Bandzugkraft im Meßbereich eingesetzt, wobei als Stellgröße entsprechende Regelsignale an eine Bremskraftvorrichtung übermittelt werden. Natürlich wird hierzu eine Regelanlage benötigt, die für die entsprechenden Signale sorgt und die Auswertung der von der Zugmeßrolle erfaßten Meßwerte übernimmt.The continuous belt is preferably at least one before, after and / or in the measuring range and possibly at least a further deflection roller arranged after the measuring range led, the upstream of the measuring range Deflection roller can be designed as a tension measuring roller and for Determination of the tape tension in the measuring range is used. It leaves the tape tensile force in the measuring range is more preferred Regulate embodiment of the invention. In this context is usually the input variable from the tension measuring roller determined tape tensile force used in the measuring range, corresponding control signals to a Brake power device are transmitted. Of course it will a control system is required for this purpose Signals ensures and the evaluation of the tension measuring roller recorded measured values.

Es sollte betont werden, daß generell an Stelle der Zugmeßrolle selbstverständlich jedwede andere Meßvorrichtung eingangsseitig des Meßbereiches oder innerhalb zum Einsatz kommen kann, solange diese Meßvorrichtung zur Ermittlung des Bandzuges bzw. der Bandzugkraft geeignet ist. Sobald man den eingangsseitig oder innerhalb des Meßbereiches vorliegenden Bandzug bzw. die zugehörige Bandzugkraft kennt, läßt sich problemlos die Bremskraft entsprechend aufbauen bzw. einstellen. Dies erfolgt dergestalt, daß die Bremskraft betragsmäßig nahezu der Bandzugkraft entspricht, so daß das durchlaufende Band im Meßbereich fast zugfrei ist. Üblicherweise wird hier mit Bremskräften gearbeitet, die in etwa bis 98, 99 % der Bandzugkraft entsprechen.It should be emphasized that in general instead of the tension measuring roller of course any other measuring device on the input side of the measuring range or within can come as long as this measuring device to determine the tape tension or the tape tension is suitable. As soon as one that is present on the input side or within the measuring range Knows the belt tension or the associated belt tension, can easily build the braking force accordingly or adjust. This is done in such a way that the braking force amounts almost equal to the belt tension, see above that the continuous belt is almost draft-free in the measuring range. Usually, braking forces are used here, which are in correspond to about 98, 99% of the belt tension.

Eine besonders bevorzugte Ausgestaltung der Erfindung mit selbständiger Bedeutung ist dadurch gekennzeichnet, daß die Bremskraftvorrichtung das durchlaufende Band mit der der Bandzugkraft entgegengesetzt gerichteten Bremskraft berührungslos beaufschlagt. Selbstverständlich liegt es auch im Rahmen der Erfindung, daß die Bremskraftvorrichtung über Reibkräfte die entsprechende Bremskraft in das durchlaufende Band einträgt, wie dieses z. B. mittels eines S-Rollensatzes gelingt. Die berührungslose Bremskraftbeaufschlagung wird im allgemeinen mittels zumindest eines Linearmotors vorgenommen, wie er beispielsweise in der deutschen Patentanmeldung 197 19 994.1-32 beschrieben ist, auf die ausdrücklich Bezug genommen wird. Sofern zusätzlich noch die Meßvorrichtung Bandunplanheiten berührungslos erfaßt, wird eine insgesamt maximale Bandschonung erreicht. Die Gefahr von Bandoberflächenbeschädigungen ist ausgeschlossen. Dabei ist zu berücksichtigen, daß ein derartiger Linearmotor mit Stator bzw. Induktor sowie Anker in der Funktionsweise einem "normalen" elektrischen (Asynchron-)Motor ähnelt. Denn bei ihm führt die Erzeugung eines fortlaufenden Wechselfeldes des gleichsam in eine Ebene "aufgerollten" Stators zu einer Linearbewegung des Ankers (Metallband). Dieses läßt sich darauf zurückführen, daß in dem Anker ein im Vergleich zum Stator gleichgerichtetes elektromagnetisches Feld über Induktion erzeugt wird. Derartige Gegenfelder lassen sich jedoch nicht in sämtlichen Materialien erzielen, so daß beispielsweise austenitische Edelstähle nicht auf die skizzierte Weise behandelt werden können, sondern hier die Bremskraft reibend in das Band eingetragen werden muß.A particularly preferred embodiment of the invention with independent meaning is characterized in that the Brake force device the continuous band with the Belt tension force opposing braking force without contact acted upon. Of course it is also in the Framework of the invention that the braking force device over Frictional forces the corresponding braking force in the continuous Enter tape like this z. B. by means of a S-roll set succeeds. The contactless application of braking force is generally by means of at least one linear motor made, such as in the German Patent application 197 19 994.1-32 is described which is expressly referred to. If additional the measuring device still detects tape unevenness, maximum overall protection of the belt is achieved. The risk of belt surface damage is excluded. It should be borne in mind that such Linear motor with stator or inductor and armature in the How a "normal" electric (asynchronous) motor works resembles. Because with him the generation of one continuous alternating field of, as it were, in one plane "Rolled up" stator for linear movement of the armature (Metal band). This can be attributed to the fact that in the armature is rectified compared to the stator electromagnetic field is generated via induction. Such However, opposing fields cannot be found in all Achieve materials so that, for example, austenitic Stainless steels cannot be treated in the manner outlined can, but here the braking force rubbing into the band must be entered.

Im allgemeinen arbeitet die Meßvorrichtung in Vertikalrichtung in Vergleich zum durchlaufenden Band, und zwar über dessen gesamte Bandbreite. Dabei können die von der Meßvorrichtung ermittelten Planheitswerte als Eingangsgrößen (Ist-Werte) in eine Planheitsregelanlage eingespeist werden, wobei hieran angeschlossene Stellglieder zur Regelung der Planheit (nach einem Soll/Ist-Wert-Vergleich) entsprechend beeinflußt werden. Das heißt, es kann grundsätzlich so verfahren werden, wie dieses in der bereits benannten DE-OS 42 24 569 beschrieben ist.In general, the measuring device works in the vertical direction compared to the continuous belt, namely across its entire range. The can of the Measuring device determined flatness values as input variables (Actual values) fed into a flatness control system be, connected actuators for control according to the flatness (after a target / actual value comparison) to be influenced. That said, it can basically proceed as described in the above DE-OS 42 24 569 is described.

Gegenstand der Erfindung ist auch eine Vorrichtung zur Planheitsmessung von Bändern, insbesondere Metallbändern, mit zumindest einer Vorrichtung zur Beaufschlagung des durchlaufenden Bandes mit einer vorgegebenen Bandzugkraft und mit zumindest einer in einem Meßbereich in vorgegebenem Abstand von der Bandoberfläche angeordneten Meßvorrichtung zur Detektion von Bandplanheiten, die sich durch eine besonders funktionsgerechte und einfache Bauweise auszeichnet. Diese Vorrichtung ist dadurch gekennzeichnet, daß vor dem und/oder im Meßbereich eine Bremskraftvorrichtung zur gezielten Verringerung der Bandzugkraft und zur Aufbringung einer Bremskraft angeordnet ist. Die Bremskraftvorrichtung kann als zumindest ein berührungslos arbeitender Linearmotor ausgebildet sein. Es besteht aber auch die Möglichkeit, daß die Bremskraftvorrichtung aus S-Rollensätzen sowie Andrück- und Treibrollen besteht. Bevorzugt ist der Meßbereich als vertikale Meßstrecke ausgebildet, wobei die Länge der Meßstrecke in der Größenordnung der maximalen Bandbreite liegen sollte. - Eine derartige Vorrichtung zur Planheitsmessung läßt sich bei Walzwerken ebenso einsetzen wie bei Richtanlagen oder Aufwickelprozessen.The invention also relates to a device for Flatness measurement of strips, especially metal strips, with at least one device for loading the continuous belt with a predetermined belt tension and with at least one in a measuring range in a predetermined Distance from the belt surface arranged measuring device for the detection of band flatness, which is characterized by a special functional and simple design. This device is characterized in that before that and / or in the measuring range a braking force device for targeted reduction in belt tension and application a braking force is arranged. The braking device can work as at least a non-contact Be linear motor. But there is also the possibility that the braking force device from S-roller sets as well as pressure and drive rollers. The is preferred Measuring range designed as a vertical measuring section, the Length of the measuring section in the order of the maximum Bandwidth should be. - Such a device for Flatness measurement can also be used in rolling mills like with straightening systems or winding processes.

Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert; es zeigen:

Fig. 1
eine erste Ausführungsform der Erfindung mit berührungsloser Einleitung der Bremskraft und
Fig. 2
eine abgewandelte Ausgestaltung, dieses Mal für die berührende Einbringung der Bremskraft, beispielsweise bei austenitischen Edelstählen.
In the following, the invention is explained in more detail with reference to a drawing showing only one embodiment; show it:
Fig. 1
a first embodiment of the invention with contactless introduction of the braking force and
Fig. 2
a modified configuration, this time for the touching application of the braking force, for example in the case of austenitic stainless steels.

In den Figuren ist eine Vorrichtung zur Planheitsmessung von Bändern 1, nach dem Ausführungsbeispiel Metallbändern 1 gezeigt. Dabei wird das durchlaufende Band 1 mit einer vorgegebenen Bandzugkraft FZ beaufschlagt, welche über einen Zugrollensatz 2 und einen Bremsrollensatz 3 aufgebracht wird. Die Anordnung mag dabei vom Prinzip her so getroffen sein, wie dieses in der DE-OS 39 12 676 oder der DE-OS 26 25 414 dargestellt ist (vergl. Fig. 2). - Bei dem Ausführungsbeispiel nach Fig. 1 wird die erforderliche Bandzugkraft FZ mittels eines Linearmotors 4 oder mehrerer bzw. einer Reihe von Linearmotoren berührungslos erzeugt. Dieser Linearmotor 4 weist ausweislich des vergrößerten Ausschnittes in Fig. 1 einen Stator bzw. Induktor 5 und einen Anker 1 auf. Bei diesem Anker 1 handelt es sich um das Metallband 1. Das Metallband 1 bewegt sich über den Linearmotor 4 hinweg, wobei dieser in dem Metallband 1 Zug und/oder Druck erzeugen kann. Der Stator 5 weist nebeneinander angeordnete Spulen in Schlitzen zwischen Querzähnen auf.A device for measuring flatness of strips 1, according to the exemplary embodiment metal strips 1, is shown in the figures. In this case, the continuous belt 1 is subjected to a predetermined belt tensile force F Z , which is applied via a pull roller set 2 and a brake roller set 3. The arrangement may be made in principle as it is shown in DE-OS 39 12 676 or DE-OS 26 25 414 (see FIG. 2). In the exemplary embodiment according to FIG. 1, the required belt tensile force F Z is generated in a contactless manner by means of a linear motor 4 or more or a series of linear motors. According to the enlarged detail in FIG. 1, this linear motor 4 has a stator or inductor 5 and an armature 1. This armature 1 is the metal strip 1. The metal strip 1 moves over the linear motor 4, which can generate tension and / or pressure in the metal strip 1. The stator 5 has coils arranged next to one another in slots between transverse teeth.

Vorliegend sind zwei mit Spalt sich gegenüberliegende Statoren 5 vorgesehen, zwischen denen das Metallband 1 hindurchgeführt wird. Diese Vorgehensweise läßt sich dadurch erklären, daß der Anker 1 aus üblicherweise nichtferromagnetischem Material in undefinierter Weise vom Stator 5 abgestoßen wird. Derartiges liegt daran, daß das im Anker 1 induzierte Feld und das Statorfeld gleichgerichtet sind. Jedenfalls läßt sich ein derartiger Anker 1 bzw. das Metallband 1 einwandfrei in Linearrichtung am einfachsten für den Fall fortbewegen, daß es zwischen den beiden mit Spalt gegenüberliegend angeordneten Statoren 5 geführt wird. Denn durch diese Anordnung heben sich die jeweils entgegengesetzten Abstoßungskräfte in bezug auf den jeweiligen Anker 1 gegenseitig auf, so daß gleichsam ein "Schwebezustand" des Metallbandes 1 erreichbar ist.There are two stators opposite each other with a gap 5 provided between which the metal strip 1 is passed becomes. This procedure can be done explain that the armature 1 is made of usually non-ferromagnetic Material from stator 5 in an undefined manner is repelled. Such is because the anchor in the 1st induced field and the stator field are rectified. In any case, such an anchor 1 or that Metal strip 1 is easiest in the linear direction in case it gets between the two with Stator 5 arranged opposite gap becomes. Because of this arrangement, each one is raised opposite repulsive forces with respect to each Anchor 1 on each other, so that as it were "Floating state" of the metal strip 1 can be reached.

Darüber hinaus findet sich ein Meßbereich M innerhalb dessen eine Meßvorrichtung 6 vorgesehen ist. Dieser Meßbereich M ist als vertikale Meßstrecke ausgeführt, wobei seine Länge im wesentlichen der maximalen Bandbreite entspricht. Die Meßvorrichtung 6 ist in vorgegebenem Abstand A von der Bandoberfläche angeordnet und detektiert Bandunplanheiten. In addition, there is a measuring range M within it a measuring device 6 is provided. This measuring range M is designed as a vertical measuring section, with its Length essentially corresponds to the maximum bandwidth. The measuring device 6 is at a predetermined distance A from the Belt surface arranged and detected belt unevenness.

Innerhalb des Meßbereiches M und/oder unmittelbar davor wird die Bandzugkraft FZ gezielt verringert, um bandzugbedingte Fehler bei der Planheitsmessung ausschließen zu können. Zu diesem Zweck wird im Meßbereich M mit einer im Vergleich zur Bandzugkraft FZ entgegengesetzt gerichteten Bremskraft B gearbeitet. Diese Bremskraft B wird von einer Bremskraftvorrichtung 7 aufgebracht. Bei dieser Bremskraftvorrichtung 7 handelt es sich nach dem Ausführungsbeispiel in Fig. 1 um einen Linearmotor 7, während in dem Ausführungsbeispiel nach Fig. 2 jeweils zwei S-Rollensätze 7a, 7b vorgesehen sind. Ausweislich der Fig. 1 ist die Bremskraftvorrichtung 7 innerhalb des Meßbereiches M angeordnet, während nach der Darstellung in Fig. 2 eine Anordnung davor (und dahinter) verfolgt wird. Selbstverständlich sind auch Mischformen denkbar.Within the measuring range M and / or immediately before it, the strip tensile force F Z is deliberately reduced in order to be able to rule out strip tension-related errors in the flatness measurement. For this purpose, in the measuring range M one works with a braking force B which is opposite to the strip tensile force F Z. This braking force B is applied by a braking force device 7. This braking force device 7, according to the exemplary embodiment in FIG. 1, is a linear motor 7, while in the exemplary embodiment according to FIG. 2, two S-roller sets 7a, 7b are provided. As shown in FIG. 1, the braking force device 7 is arranged within the measuring range M, while, as shown in FIG. 2, an arrangement in front of it (and behind it) is tracked. Mixed forms are of course also conceivable.

Der Linearmotor 7 nach Fig. 1 arbeitet berührungslos und erzeugt die Bremskraft B an dieser Stelle dergestalt, daß das Metallband 1 mit einem im Vergleich zum Linearmotor 4 entgegengesetzt gerichteten fortlaufenden Feld beaufschlagt wird. Jedenfalls sind Bandzugkraft FZ und Bremskraft B entgegengesetzt gerichtet, wie die zugehörigen Kraftvektoren in den Figuren deutlich machen. Selbstverständlich liegen auch Winkelstellungen im Rahmen der Erfindung, wobei sich für diesen Fall die tatsächlich wirkende Bremskraft B anhand der in Bandzugrichtung bzw. Bandzugkraftrichtung liegenden Horizontalkomponente BH bemißt, wie dieses in Fig. 1 angedeutet ist. BV bezeichnet hierbei die korrespondierende Vertikalkomponente der Bremskraft B. - Die vorgenannte Darstellung macht darüber hinaus deutlich, daß die Bremskraft B (bzw. BH) und die Bandzugkraft FZ betragsmäßig nahezu gleich groß ausgebildet sind.The linear motor 7 according to FIG. 1 operates contactlessly and generates the braking force B at this point in such a way that the metal strip 1 is acted upon by a continuous field which is directed in the opposite direction to the linear motor 4. In any case, the belt tensile force F Z and braking force B are directed in opposite directions, as the associated force vectors make clear in the figures. Of course, angular positions are also within the scope of the invention, in which case the actually acting braking force B is measured on the basis of the horizontal component B H lying in the direction of the strip tension or the direction of the force of the strip, as is indicated in FIG. 1. B V here designates the corresponding vertical component of the braking force B. - The above illustration also makes it clear that the braking force B (or B H ) and the belt tensile force F Z are of almost equal magnitude.

Das durchlaufende Band bzw. Metallband 1 wird über zumindest eine vor oder in dem Meßbereich M angeordnete Umlenkrolle 8 geführt. Zusätzlich kann eine weitere, nach dem Meßbereich M angeordnete Umlenkrolle 9 vorgesehen sein. Dieses gilt auch für die ferner innerhalb des Meßbereiches verwirklichte Umlenkrolle 10. Jedenfalls ist die dem Meßbereich M vorgeordnete Umlenkrolle 8 als Zugmeßrolle 8 ausgebildet und dient zur Bestimmung der Bandzugkraft FZ innerhalb des Meßbereiches M.The continuous strip or metal strip 1 is guided over at least one deflection roller 8 arranged in front of or in the measuring area M. In addition, a further deflection roller 9 arranged after the measuring range M can be provided. This also applies to the deflection roller 10 which is also realized within the measuring range. In any case, the deflection roller 8 upstream of the measuring range M is designed as a tension measuring roller 8 and is used to determine the tape tensile force F Z within the measuring range M.

Nach dem Ausführungsbeispiel in Fig. 1 ist ferner eine Regelanlage 11 vorgesehen, an welche die dem Meßbereich M vorgeordnete Zugmeßrolle 8 angeschlossen ist. Die vorgenannte Zugmeßrolle 8 liefert dabei Ist-Werte der Bandzugkraft FZ an die vorgenannte Regelanlage 11, wobei diese zur Steuerung der Bremskraft B und Einstellung der gewünschten Bandzugkraft FZ im Meßbereich M die Bremskraftvorrichtung 7 entsprechend beeinflußt. Zu diesem Zweck ist die Bremskraftvorrichtung 7 an die Regelanlage 11 angeschlossen und wird mit abgeleiteten Vorgabewerten beaufschlagt.According to the exemplary embodiment in FIG. 1, a control system 11 is also provided, to which the tension measuring roller 8 upstream of the measuring range M is connected. The aforementioned tension measuring roller 8 supplies actual values of the tape tension F Z to the aforementioned control system 11, which influences the braking force device 7 accordingly in order to control the braking force B and to set the desired tape tension F Z in the measuring range M. For this purpose, the braking force device 7 is connected to the control system 11 and derived default values are applied to it.

Denkbar ist es in diesem Zusammenhang, daß die Regelanlage 11 die dem jeweils zugehörigen Stator 5 des Linearmotors 7 zugeführte elektrische Leistung und damit die Bremskraft B steuert. Selbstverständlich läßt sich auf diese Weise generell auch die Stromlaufrichtung beeinflussen, wenngleich diese vorliegend immer so gewählt ist, daß die Bremskraft B entgegengesetzt zur Bandzugkraft FZ gerichtet ist.In this context, it is conceivable that the control system 11 controls the electrical power supplied to the respectively associated stator 5 of the linear motor 7 and thus the braking force B. Of course, the direction of the current flow can also generally be influenced in this way, although in the present case it is always chosen such that the braking force B is directed counter to the belt tensile force F Z.

Bei der Meßvorrichtung 6 handelt es sich nach der gezeigten Darstellung um eine CCD-Kamera. Selbstverständlich ist an dieser Stelle auch ein laseroptischer Abstandsmesser denkbar. In gleicher Weise können induktive oder kapazitive Sensoren zum Einsatz kommen. Auch Moiré-Verfahren können zur Planheitsmessung verwirklicht werden. Jedenfalls ist die Meßvorrichtung 6 in Vertikalrichtung V im Vergleich zum durchlaufenden Band 1 mit vorgegebenem Abstand A oberhalb der Bandoberfläche angeordnet und arbeitet nach dem Ausführungsbeispiel berührungslos. Außerdem erfolgt eine Erfassung von beispielsweise Abstandsänderungen oder Bandunregelmäßigkeiten bzw. Bandunplanheiten über die gesamte Bandbreite des Metallbandes 1. Generell ist hier (das heißt an dieser Stelle) auch der Einsatz von Planheitsmeßrollen denkbar, wenngleich nicht bevorzugt.The measuring device 6 is as shown Representation around a CCD camera. Of course it is on a laser-optical distance meter is also conceivable at this point. In the same way, inductive or capacitive Sensors are used. Moiré processes can also be used for flatness measurement. Anyway the measuring device 6 in the vertical direction V compared to continuous band 1 with a predetermined distance A above arranged the band surface and works according to the embodiment contactless. There is also an entry for example, changes in distance or band irregularities or band unevenness over the entire Band width of the metal strip 1. Generally here (that is at this point) also the use of flatness measuring rollers conceivable, although not preferred.

Nach dem Ausführungsbeispiel in Fig. 2 wird die Bremskraft B über dortige S-Rollensätze 7a, 7b mit zugehörigen Andrückrollen 12 aufgebracht. Diese S-Rollensätze 7a, 7b können grundsätzlich mit unterschiedlichen Geschwindigkeiten gefahren werden, so daß der gewünschte Abbau der Bandzugkraft FZ bzw. die Aufbringung der Bremskraft B problemlos dargestellt werden kann. Dieses geschieht üblicherweise über den jeweiligen S-Rollensätzen 7a, 7b zugeordnete Getriebe mit Geschwindigkeitsregelung, die im einzelnen nicht dargestellt sind. According to the embodiment in FIG. 2, the braking force B is applied via local S-roller sets 7a, 7b with associated pressure rollers 12. These S-roller sets 7a, 7b can in principle be driven at different speeds, so that the desired reduction in the belt tensile force F Z or the application of the braking force B can be represented without problems. This is usually done via the respective S-roller sets 7a, 7b associated gearboxes with speed control, which are not shown in detail.

Im Rahmen der Erfindung wird man zumindest eine der Rollen 13 des dem Meßbereich M nachgeschalteten S-Rollensatzes 7b mit entsprechend variierbarem Rollenmantel versehen. Dabei kann die Wahl der entsprechenden Wölbung des Rollenmantels in Abhängigkeit von den mittels der Meßvorrichtung 6 erfaßten Meßwerte erfolgen. Das heißt, im Rahmen der Erfindung ist nach dem Ausführungsbeipiel in Fig. 2 zusätzlich eine weitere Regelvorrichtung bzw. Planheitsregelanlage 14 vorgesehen, welche die Aus- bzw. Einwölbung der S-Rolle 13 im S-Rollensatz 7b beeinflußt, und zwar in Abhängigkeit von durch die Meßvorrichtung 6 ermittelten Planheitsmeßwerten. Hierdurch wird eine besonders kompakte und vorteilhafte Ausgestaltung erzielt, weil der dem Meßbereich M nachgeschaltete S-Rollensatz 7b nicht nur zur Erzeugung der erforderlichen Bremskraft B herangezogen wird, sondern gleichzeitig Planierungsfunktionen für das Metallband 1 übernehmen kann.Within the scope of the invention one becomes at least one of the roles 13 of the S-roller set 7b connected downstream of the measuring range M. provided with a correspondingly variable roller jacket. Here can choose the appropriate curvature of the roll cover as a function of the measurement device 6 measured values are carried out. That is, as part of the The invention is based on the exemplary embodiment in FIG. 2 an additional control device or flatness control system 14 provided, which the bulging the S-roll 13 in the S-roll set 7b, and depending on the determined by the measuring device 6 Flatness measurements. This makes one special compact and advantageous design achieved because of S-roller set 7b downstream of measuring range M not only used to generate the required braking force B. but at the same time planning functions for the Metal strip 1 can take over.

Claims (13)

Verfahren zur Planheitsmessung von Bändern (1), insbesondere Metallbändern (1), im Zuge des Durchlaufens von beispielsweise Bandbehandlungsanlagen, Walzwerken oder dergleichen, wonach das durchlaufende Band (1) mit einer vorgegebenen Bandzugkraft (FZ) beaufschlagt wird, und wonach mittels zumindest einer in einem Meßbereich (M) in vorgegebenem Abstand (A) von der Bandoberfläche angeordneten Meßvorrichtung (6) Bandunplanheiten detektiert werden,
dadurch gekennzeichnet, daß die Bandzugkraft (FZ) vor dem und/oder in dem Meßbereich (M) gezielt verringert wird, um bandzugbedingte Fehler bei der Planheitsmessung ausschließen zu können. Method for measuring flatness of strips (1), in particular metal strips (1), in the course of passing through strip treatment plants, rolling mills or the like, for example the continuous belt (1) is subjected to a predetermined belt tensile force (F Z ), and then by means of at least one measuring device (6) arranged in a measuring area (M) at a predetermined distance (A) from the strip surface, strip unevenness is detected,
characterized in that the strip tensile force (F Z ) is specifically reduced in front of and / or in the measuring range (M) in order to be able to rule out strip tension-related errors in the flatness measurement. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das durchlaufende Band (1) vor und/oder im Meßbereich (M) mit einer im Vergleich zur Bandzugkraft (FZ) im wesentlichen entgegengesetzt gerichteten Bremskraft (B) beaufschlagt wird, wobei die Bremskraft (B) betragsmäßig nahezu der Bandzugkraft (FZ) entspricht.A method according to claim 1, characterized in that the continuous belt (1) before and / or in the measuring range (M) is subjected to a braking force (B) which is essentially opposite to the belt tensile force (F Z ), the braking force (B ) almost corresponds to the strip tensile force (F Z ). Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das durchlaufende Band (1) über zumindest eine vor, nach und/oder in dem Meßbereich (M) angeordnete Umlenkrolle (8) geführt wird, wobei die vorgenannte Umlenkrolle (8) als Zugmeßrolle (8) ausgebildet ist und zur Bestimmung der Bandzugkraft (FZ) im Meßbereich (M) dient.Method according to Claim 1 or 2, characterized in that the continuous belt (1) is guided over at least one deflection roller (8) arranged before, after and / or in the measuring area (M), the aforementioned deflection roller (8) acting as a tension measuring roller ( 8) is designed and is used to determine the tape tensile force (F Z ) in the measuring range (M). Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Bandzugkraft (FZ) im Meßbereich (M) geregelt wird, wobei als Eingangsgröße die beispielsweise von der Zugmeßrolle (8) ermittelte Bandzugkraft (FZ) im Meßbereich (M) gemessen wird, und wobei als Stellgröße entsprechende Regelsignale an eine Bremskraftvorrichtung (7) übermittelt werden.Method according to one of claims 1 to 3, characterized in that the strip tension force (F Z) in the measuring region (M) is controlled, using as input measured the tensile force determined for example by the tension measuring roller (8) (F Z) in the measuring region (M) is, and corresponding control signals are transmitted as a manipulated variable to a braking force device (7). Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Bremskraftvorrichtung (7) das durchlaufende Band (1) mit der der Bandzugkraft (FZ) entgegengesetzt gerichteten Bremskraft (B) berührungslos beaufschlagt.Method according to one of claims 1 to 4, characterized in that the braking force device (7) acts on the continuous band (1) with the braking force (F Z ) opposing the band tensile force (F Z ) without contact. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Meßvorrichtung (6) Bandunplanheiten berührungslos erfaßt.Method according to one of claims 1 to 5, characterized in that that the measuring device (6) band unevenness recorded without contact. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Meßvorrichtung (6) in Vertikalrichtung (V) im Vergleich zum durchlaufenden Band (1) und über dessen gesamte Bandbreite arbeitet.Method according to one of claims 1 to 6, characterized in that that the measuring device (6) in the vertical direction (V) compared to the continuous belt (1) and works across its entire range. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die von der Meßvorrichtung (6) ermittelten Planheitswerte als Eingangsgrößen in eine Planheitsregelanlage (14) eingespeist werden, wobei hieran angeschlossene Stellglieder (13) zur Regelung der Planheit entsprechend beeinflußt werden.Method according to one of claims 1 to 7, characterized in that that determined by the measuring device (6) Flatness values as input variables in a flatness control system (14) can be fed, connected to it Actuators (13) for controlling the flatness accordingly to be influenced. Vorrichtung zur Planheitsmessung von mit einer vorgegebenen Bandzugkraft durchlaufenden Bändern (1), insbesondere Metallbändern (1), für die Durchführung des Verfahrens nach einem der Ansprüche 1 bis 8, mit zumindest einer in einem Meßbereich (M) in vorgegebenem Abstand (A) von der Bandoberfläche angeordneten Meßvorrichtung (6) zur Detektion von Bandunplanheiten,
dadurch gekennzeichnet, daß vor dem und/oder im Meßbereich (M) eine Bremskraftvorrichtung (7) zur gezielten Verringerung der Bandzugkraft (FZ) und Aufbringung einer Bremskraft (B) angeordnet ist. Device for measuring the flatness of strips (1), in particular metal strips (1), which run through with a predetermined strip tensile force, for carrying out the method according to one of Claims 1 to 8, with at least one measuring device (6) arranged in a measuring area (M) at a predetermined distance (A) from the strip surface for detecting strip flatness,
characterized in that a braking force device (7) is arranged in front of and / or in the measuring area (M) for the targeted reduction of the strip tensile force (F Z ) and application of a braking force (B). Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß die Bremskraftvorrichtung (7) als zumindest ein berührunglos arbeitender Linearmotor (7) ausgebildet ist.Apparatus according to claim 9, characterized in that the braking force device (7) as at least one non-contact working linear motor (7) is formed. Vorrichtung nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß die Bremskraftvorrichtung (7) als zumindest ein dem Meßbereich (M) vorgeschalteter S-Rollensatz (7a, 7b) ggf. mit Andrückrolle (12) ausgebildet ist.Apparatus according to claim 9 or 10, characterized in that the braking force device (7) as at least an S-roller set (7a, 7b) is optionally formed with a pressure roller (12). Vorrichtung nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, daß zumindest eine dem Meßbereich (M) vorgeordnete, nachgeordnete und/oder im Meßbereich (M) angeordnete Zugmeßrolle (8) vorgesehen ist, welche Ist-Werte der Bandzugkraft (FZ) im Meßbereich (M) an eine angeschlossene Regelanlage (11) liefert, wobei die Regelanlage (11) zur Steuerung der Bremskraft (B) und Ermittlung der gewünschten Bandzugkraft (FZ) im Meßbereich (M) die Eremskraftvorrichtung (7) entsprechend beeinflußt.Device according to one of claims 9 to 11, characterized in that at least one tension measuring roller (8) which is upstream, downstream and / or arranged in the measuring range (M) is provided, which actual values of the strip tensile force (F Z ) in the Provides measuring range (M) to a connected control system (11), the control system (11) for controlling the braking force (B) and determining the desired belt tension (F Z ) in the measuring range (M) influencing the eremskraftvorrichtung (7) accordingly. Vorrichtung nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, daß der Meßbereich (M) als vertikale Meßstrecke ausgebildet ist und die Länge der Meßstrecke ggf. der maximalen Bandbreite entspricht.Device according to one of claims 9 to 12, characterized characterized in that the measuring range (M) as a vertical measuring section is formed and the length of the measuring section may corresponds to the maximum bandwidth.
EP99116003A 1998-09-24 1999-08-14 Method and device for measuring the flatness of strips Expired - Lifetime EP0988904B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843899 1998-09-24
DE19843899A DE19843899C1 (en) 1998-09-24 1998-09-24 Method and device for measuring flatness of strips

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EP0988904A2 true EP0988904A2 (en) 2000-03-29
EP0988904A3 EP0988904A3 (en) 2003-01-22
EP0988904B1 EP0988904B1 (en) 2004-02-25

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EP99116003A Expired - Lifetime EP0988904B1 (en) 1998-09-24 1999-08-14 Method and device for measuring the flatness of strips

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US (1) US6164104A (en)
EP (1) EP0988904B1 (en)
AT (1) ATE260151T1 (en)
CA (1) CA2283192C (en)
DE (2) DE19843899C1 (en)
ES (1) ES2212429T3 (en)
ZA (1) ZA995849B (en)

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CN114659435B (en) * 2022-03-18 2022-11-01 广东嘉元科技股份有限公司 Electrolytic copper foil warpage testing machine tool based on ear material and testing method

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US6164104A (en) 2000-12-26
CA2283192A1 (en) 2000-03-24
EP0988904B1 (en) 2004-02-25
DE59908627D1 (en) 2004-04-01
ZA995849B (en) 2000-04-04
ATE260151T1 (en) 2004-03-15
CA2283192C (en) 2003-12-30
ES2212429T3 (en) 2004-07-16
DE19843899C1 (en) 2000-05-04
EP0988904A3 (en) 2003-01-22

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