EP1781834B1 - Procede de guidage d'une bande et mise en oeuvre dudit procede - Google Patents

Procede de guidage d'une bande et mise en oeuvre dudit procede Download PDF

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Publication number
EP1781834B1
EP1781834B1 EP05791537A EP05791537A EP1781834B1 EP 1781834 B1 EP1781834 B1 EP 1781834B1 EP 05791537 A EP05791537 A EP 05791537A EP 05791537 A EP05791537 A EP 05791537A EP 1781834 B1 EP1781834 B1 EP 1781834B1
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EP
European Patent Office
Prior art keywords
current
coil
strip
coils
band
Prior art date
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.)
Not-in-force
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EP05791537A
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German (de)
English (en)
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EP1781834A1 (fr
Inventor
Rudolf Stockmeyer
Andreas Wolff
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BETR FORSCH INST ANGEW FORSCH
BFI VDEH Institut fuer Angewandte Forschung GmbH
Original Assignee
BETR FORSCH INST ANGEW FORSCH
BFI VDEH Institut fuer Angewandte Forschung GmbH
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Publication of EP1781834A1 publication Critical patent/EP1781834A1/fr
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Classifications

    • 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
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
    • 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
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
    • B21C47/3466—Feeding or guiding devices not specially adapted to a particular type of apparatus by using specific means
    • B21C47/3483—Magnetic field
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/50—Controlling or regulating the coating processes
    • C23C2/51—Computer-controlled implementation
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/50—Controlling or regulating the coating processes
    • C23C2/52—Controlling or regulating the coating processes with means for measuring or sensing
    • C23C2/524—Position of the substrate
    • C23C2/5245—Position of the substrate for reducing vibrations of the substrate

Definitions

  • the invention relates to a method for guiding a tape between two oppositely arranged coils of a device having a position sensor for the position determination of the tape between the coils and current generator for the coils.
  • thin uniform metal layers i.a. also applied zinc layers by means of various methods on metal strips.
  • the strip first passes through a molten zinc melt and is subsequently drawn off at the top. Due to its viscosity, the melt adheres to the metal strip above the metal strip level and thus forms a freely adhering zinc layer around the metal strip.
  • This zinc layer is usually much thicker than needed - so it may be up to twenty times the required layer thickness in some cases - and must therefore be returned to the respective desired layer thickness afterwards.
  • the nozzle-tape distance may also change due to the tape transverse shape, for example a transverse bow.
  • the tape transverse shape produces undesirable layer thickness changes in the transverse direction (width direction) of the tape.
  • Such a method is for example in EP 1 312 692 A1 described.
  • the tape is carried out between two oppositely arranged coils of a tape guide device. Position sensors determine the position of the tape between the bobbins, whereby tape unevenness is also detected.
  • values for the currents to be supplied to the coils are determined from the positional actual values of the band between the opposing coils, so that the band is moved into the desired position, namely the center plane between the coils.
  • One reason for using electromagnetic stripping methods is the inability of the gas scrapers to produce very thin film thicknesses.
  • WO 02/14572 A1 is one too EP 1 312 692 A1 similar method known. Again, the band is stabilized by interventions of a regulator in a plane between the coils. WO 02/14572 A1 describes another magnetic device for stripping the excess applied coating material.
  • WO 02/14192 A1 also deals with band stabilization in a plane between two opposing coils. The procedure agrees with the in WO 02/14572 A1 described band stabilization match. A voltage of constant amplitude is applied to the coil in sections (pulsed). The pulse duration is specified. It is therefore a pulse duration method. Here too, measured values dependent on the position of the band are recorded for determining the band position between the coils. These measurements serve as input to a controller whose output signals are fed to the coils to move the tape to the desired fixed plane.
  • the invention has the object to provide a method for guiding a tape, which allows a rapid adjustment of the desired tape position and tape transverse shape.
  • the inventive method for guiding a tape is based on the idea of applying a first and a second current to the first and the second coil when the tape is within a certain spatial range around the position setpoint. It has been found that the band position or band shape can be adjusted particularly precisely when the band is acted upon on both sides with magnetic forces, wherein the difference of the magnetic forces causes the adjustment of the band position or band shape. However, in order to be able to react as quickly as possible to extreme deviations from the band position or the band shape, it is advantageous if only one coil is supplied with current outside of a specific spatial range around the desired position value, so as to bring the band in as rapidly as possible without counterforce to convert the range of the position setpoint. However, even with extreme deviation in the Bandlage or the band shape both coils are energized to act on both sides of the magnetic forces on the band.
  • the position setpoint may be, for example, a position of the band between the coils, which is also outside the otherwise assumed center plane between the coils.
  • the method according to the invention makes it possible, in addition to the damping of the band oscillation also achieved with the devices of the prior art, to quickly set an optimum band shape and band position, for example for the coating result, or to rapidly damp torsional oscillations.
  • This optimal tape position and tape shape may result, for example, in the deliberate generation of transverse bends, tape deflections or tape slants.
  • the band shape can be influenced, for example, a cross-bowed band are bent back into a plane band. It is also possible to give the band an inclined position, so that the band is not parallel to the center plane between the coils.
  • the magnets arranged side by side in the band width direction offer the possibility of giving the band a multiplicity of forms or a multiplicity of forms, such as For example, transverse bows, tape waves, edge bends, etc., compensate and convert the tape in a flat position.
  • the method according to the invention thus offers for the first time a possibility of rapidly reacting to the defects of the coating device by changing the band position or band shape between the coils guiding the band and thus of changing the band shape or band position in the coating device and, in spite of these errors of the band coating device, achieving an optimum coating result achieve.
  • the inventive method has the advantage that the Bandzugsollwert can be reduced if the band vibration is reduced by the guide. This results in less wear in the belt roller bearings, a better belt surface of the belt (the just solidified zinc adheres less to the upper pulley), the force for the tape guide is lower and the natural frequency of the belt is lower.
  • the current generators each a target current is supplied, wherein the target current for the first coil is generated according to the proviso that the first coil with a first current and the second coil is acted upon by a second current when the band within a certain spatial Area around the desired position.
  • the target current supplied to the respective coils for positions of the tape to a certain range (only for x> b for the first coil and x ⁇ f for the second coil)
  • the aforementioned advantage is achieved that the tape is outside of a tape position certain spatial Force applied to the position setpoint from only one side to be moved as quickly as possible in the range around the position setpoint.
  • the found specifications for the target current also cause the first coil to exert a greater force of attraction on the band when the band is at the first coil distal edge of the spatial area around the position setpoint, while at this point the attraction of the second coil is reduced.
  • the invention does not use the pulse duration method but a two-point control method for the coil current.
  • the pulse duration method the necessary pulse duration must first be determined. This is omitted in the two-point control method.
  • the coil voltage is approximately zero volts.
  • the coil voltage is + U or - U, whereby the height of U can still be specified.
  • bias currents (constant c and e) can be variable depending on the nominal position of the band or can be set constant in a simplified embodiment
  • the nominal currents I 1 and I 2 supplied to the coils are formed from a so-called common current I, which is an output signal of a position regulator.
  • I is the so-called common current for both coils as an output signal of the position controller (intermediate current setpoint).
  • the slopes and / or the constants I 01 and I 02 of the above-noted linear equations for the formation of I 1 and I 2 are variable to simultaneously or alternately fast and slow positional changes of the band characteristic of band vibrations and band shape changes are to be able to balance. To do this the actual position values are decomposed into fast and slow components before comparison with the position setpoints.
  • the position controller supplies the desired currents I 1 and I 2 for the regulation of the fast processes and the slow position changes with the adapted parameters 1a, I 01 and a 2 , I 02 .
  • the current generator controls the current supplied to it with a current regulator.
  • the current controller is preferably a two-position controller, which particularly preferably has an adjustable hysteresis.
  • the coil is supplied by the current regulator regulator with a significantly increased voltage, which can be, for example, in the range of five to ten times the nominal magnetic voltage, in order to obtain a rapid regulation of the magnetic current.
  • This voltage can be generated from a mains voltage, for example, a mains voltage of 50 Hz, by rectification, so that a temporally approximately constant voltage (so-called "DC voltage in the DC link") is formed.
  • the voltage applied to the coil well above the nominal magnetic voltage results in a large increase in the current in the coil.
  • the coil current is measured.
  • the coil current reaches a value which is higher than the setpoint current by the hysteresis value, then the voltage is interrupted or even a countervoltage is applied until the measured current value drops to a value which lies below the setpoint value by the hysteresis value. Subsequently, the voltage is reversed again and in turn applied a lying directly above the nominal magnetic voltage DC voltage.
  • This connection and countershifting of an increased DC voltage or the temporally successive application of opposite DC voltages leads to a rapid control of the desired desired current, which is achieved rapidly due to the overvoltage.
  • the regulation of the current in the coil with a two-point controller which continuously reverses a DC voltage ("DC link voltage") such that the average current value is equal to the desired value leads to a current ripple, which can be set, for example, at a frequency of 1 kHz.
  • the resultant force ripple that is the fluctuation of the force acting on the band, has twice the frequency. Their frequency and amplitude can be adjusted with the hysteresis of the two-position controller and the level of the DC link voltage.
  • the force ripple generates acceleration forces in the layer thickness direction in the liquid zinc layer. As a result, the force ripple can be used as an additional scraper of zinc.
  • the height of the intermediate circuit voltage can be adjusted, for example, with a controlled three-phase bridge circuit.
  • a common intermediate setpoint signal is generated, from which in a first current setpoint generator of the first current generator supplied target current and in a second current setpoint of the second current generator supplied setpoint are formed.
  • a quadratic characteristic is particularly preferably approximately linearized.
  • the intermediate setpoint signal is particularly preferably the output signal of a position controller, which forms the signal from the difference of a position setpoint and the measurement result of the position sensor or a distance analyzer. This determines the coil-band distance from coil current and coil voltage.
  • At least two coils are arranged side by side in the bandwidth direction on one side of this band.
  • Both coils can be supplied with the same current, although each coil can still have its own current regulator.
  • different currents can be supplied to the coils arranged next to one another.
  • a band form and band position controller can dampen the band movements of the band by changing the average force that acts on the band across the band width.
  • each magnet pair can be controlled by means of a regulator.
  • These individual regulators are then preferably coordinated by means of a superimposed regulator, which takes into account the interactions of the regulators with one another.
  • an adaptive filter is preferably used.
  • the position of at least one coil can be changed. This makes it possible, at the beginning of the coating process, in which still undamped band vibrations can prevail, to keep the coil / coils at a considerable distance from the band and thus to avoid contact with the band. However, once the control of the tape guide has damped the vibrations, the spool can be moved closer to the tape from a starting distance. This brings in particular the advantage of a power savings, since to generate the same absolute force at a smaller distance of the coil to the band, a lower current is necessary.
  • the coil spacing may be provided to adjust the position of the coil as a function of the oscillation and / or the position of the strip, for example to remove the coil from the strip as the oscillation increases.
  • the coil spacing must be large on the one hand, so that the tape does not touch the coil. On the other hand, it must be small in order to act with sufficient force on the band.
  • a distance analyzer determines the distance of the strip to the coil due to the coil current.
  • the current flowing through the coil when the voltage applied is the same depends on the distance of the strip to the coil. This makes it possible to determine the position of the tape by analyzing the current flowing through the coil and knowing the applied voltage. In this way it is possible to dispense with directly distance-measuring sensors, for example optical or band-contacting distance sensors.
  • An apparatus for carrying out the method according to the invention has, in particular, at least two coils arranged opposite one another, to each of which a current-controller regulator is assigned.
  • This current regulator preferably has a current-controlled power amplifier.
  • the current controller is preferably a two-position controller, in particular with adjustable hysteresis.
  • the position sensor of a device for carrying out the method according to the invention is particularly preferably an inductive sensor.
  • a device for carrying out the method particularly preferably has a plurality of coils on one side of the belt, which are arranged side by side in the bandwidth direction and / or in the direction of travel of the belt.
  • Multiple coils in the bandwidth direction can affect the tape attitude and the tape form in the tape width direction, for example, the adjustment of an inclined position or the compensation of a transverse arc.
  • the coils of the tape guide device in the strip running direction before or after a stripping device, in particular a stripping nozzle, a coating device are arranged.
  • An arrangement according to the wiper nozzle is in particular also to be understood as meaning an arrangement in which the bobbin is arranged in the region of the wiper nozzle or in the wiper nozzle.
  • these also have a coating device.
  • a dip bath is used as the coil coating device.
  • the dip may have a deflection roller, such as in EP 1 312 692 A1 described.
  • the tape is, for example, vertically guided from bottom to top by a bath.
  • CWGL Continuous vertical galvanizing line
  • the coating device preferably has a stripping device after the immersion bath. This stripping device may have pneumatic scrapers or Abstreiferspulen.
  • An overall device comprising the device can have deflections of the band, for example by means of deflection rollers.
  • the two oppositely arranged coils are arranged immediately before or after the coating device, so that the position or shape of the strip in the coating device and thus the coating result can be influenced by position or change in shape of the strip between the oppositely disposed coils almost immediately ,
  • the position sensor for determining the band between the coils may be a conventional distance meter that contacts the tape or operates without contact.
  • the coils are provided at several height points in the cooling tower of a coating plant, preferably above the so-called.
  • Nozzle bar ie above the Abstreifdüsen
  • the nozzle beam for example at the level of a measuring point for measuring the hot coating layer ("H contemplatmeßstelle ").
  • the respective coil preferably extends in the width direction of the band. Is in applications with the need for particularly high forces expected, for example, to reduce the transverse arc, the arrangement of the coil in the longitudinal direction may be advantageous.
  • the coil particularly preferably has an iron core with U-shape.
  • the iron core may also have a W-shape.
  • the iron core is made of electrical steel.
  • the coils preferably enclose the limbs of the U or W core. For a lower overall height but they can also enclose the yoke of the U or the yokes of a W-core.
  • a plurality of coils arranged at a distance from one another are provided around one leg. This allows the supply of cooling air between the coils.
  • temperature sensors may be provided, the measurement result of which can also be used in particular for controlling the amount of cooling air supplied.
  • the coils are particularly preferably made of copper or aluminum. However, they can be made of superconducting material to produce high forces with a small size.
  • the coils are separated from the belt with a protective screen.
  • a protective screen This is preferably made of electrically non-conductive material and in particular has a permeability such as air and preferably a heat resistance up to 700 ° C. The thickness is chosen as small as possible, for example 2 mm, so that the air gap is not additionally increased.
  • the protective screen is usually a wearing part and conform constructively. The protective screen should protect the coils from zinc dust and guide the cooling air. The cooling air should not flow against the belt.
  • the protective screen is made of ceramic or heat protection glass and may consist of several parts.
  • the method according to the invention is preferably used for guiding the strip in a coating process, particularly preferably in a hot-dip galvanizing process.
  • the position setpoints can be generated by a higher layer thickness control.
  • the guide can be used in particular in the following areas: tape in the area of the wiping nozzle (above or below the nozzle) lead tape in the area of Auflagemeßstelle, so-called.
  • Hotmeasure lead if the tape is not out there, can support (layer thicknesses) -Meßplace arise, band lead in the field of an electromagnetic Bodenverschtusses in immersion baths, in which the tape to be coated is introduced through a lower, closed by the electromagnetic bottom closure opening in the dipping bath.
  • the invention further comprises the regulation of the current in the coil with a two-position controller such that a DC voltage ("DC link voltage”) is reversed continuously such that the current center is equal to the desired value.
  • the current ripple has a frequency in the range of 1 kHz, for example.
  • the force ripple has twice the frequency.
  • the power ripple according to frequency and amplitude can be set with the hysteresis of the two-position controller and the level of the DC link voltage.
  • the force ripple generates acceleration forces in the layer thickness direction in the liquid zinc layer. These forces can be used for additional stripping of the zinc.
  • the height of the intermediate circuit voltage can be adjustable, for example with controlled three-phase bridge circuit:
  • the responsible for the regulation of the predetermined tape position tape guide device 20 is in the Fig. 1 explained in more detail.
  • the tape guiding device 20 has three units 21, 22, 23 arranged side by side over the bandwidth. These are of similar design, so that only the unit 22 is shown and described in detail.
  • the unit 22 has four coils 24, 25, 26, 27. Between the coils 24, 25, a position sensor 28 is provided.
  • a position controller 30 of the unit 22 has a position controller 31, two current setpoint generator 32 and four current controllers 34.
  • Input signal of the position control device 30 is comparison value between an output signal of the first regulator 50 and the measurement signal of the position sensor 28.
  • Output signal of the position control 30 are the coils 24, 25, 26, 27 supplied currents.
  • the control deviation resulting from the comparison of the output signal of the first controller 50 with the position actual value determined by the position sensor 28 is converted by the position controller 31 into an intermediate setpoint signal i *.
  • This intermediate setpoint signal i * is supplied to the current setpoint formers 32.
  • the current set value formers 32 form desired currents such that the current generators 34 are each supplied with a desired current, the first coil being supplied with a first current and the second coil with a second current when the band is within a certain spatial range around the desired position.
  • the desired currents thus formed are supplied to the current regulators 34.
  • the structure of the current controller 34 results from Fig. 2 ,
  • the current regulator with power amplifier 34 has a power transformer 101, a rectifier 102, a bridge with four electronic switches 103, a current sensor 105 and a current regulator 106.
  • the mains voltage U n is converted in the power transformer 101 and rectifier 102 into an intermediate circuit voltage U 0 .
  • this intermediate circuit voltage U 0 is connected to the coil 24 or connected in opposition.
  • the switching times are generated by the two-position controller. If the voltage were not switched on and off, but constantly switched on or off, the coil would overheat in a short time. Overheating does not occur because the current is regulated.
  • the DC link voltage U 0 is five to ten times higher than the rated voltage of the coil 24. While changing the voltage across the coil from + U to -U or from -U to + U, the current in the coil must not be interrupted, thus no inadmissibly high inductive voltages occur which could destroy the coil or the electronic switches. By diodes (“freewheeling diodes”) ensures that the coil current is not interrupted.
  • Fig. 3 shows, lying over the rated voltage of the magnet DC voltage for a period T1 to T2 to the coil 24 is applied.
  • the current in the coil rises to a value I set plus hysteresis, that is to say a value which is slightly above the current setpoint value I *.
  • the bridge 103 switches over the DC voltage in such a way that now the same voltage is applied to the coil 24 with the opposite sign. This leads to a drop in the current in the coil 24.
  • the current controller switches the bridge 103 again and in such a way that the DC voltage again assumes the first value.
  • a setpoint current is regulated, which varies slightly with a hysteresis around the current setpoint. Instead of switching to a negative voltage, the voltage can also be switched off. However, the timing of the current control becomes slower.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Computer Hardware Design (AREA)
  • Coating With Molten Metal (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Claims (14)

  1. Procédé de guidage d'une bande entre deux bobines disposées l'une en face de l'autre d'un dispositif qui présente un capteur de position pour la détermination de position de la bande entre les bobines et des générateurs de courant pour les bobines, caractérisé en ce que la première bobine est soumise à un premier courant et la deuxième bobine à un deuxième courant quand la bande se trouve à l'intérieur d'une zone spatiale définie autour de la position de consigne et seulement la première ou seulement la deuxième bobine est soumise à un courant quand la bande se trouve à l'extérieur de la zone spatiale définie autour de la position de consigne.
  2. Procédé selon la revendication 1, caractérisé en ce qu'un courant de consigne est amené à chacun des générateurs de courant, le courant de consigne pour la première bobine étant choisi conformément à I1∝ ax + c pour tout x > b et I1 = 0 pour tout x < b et le courant de consigne pour la deuxième bobine conformément à I2∝ dx + e pour tout x < f et I2 = 0 pour tout x > f, où a, c, d et e sont des constantes, x la distance de la bande par rapport à la position de consigne mesurée dans la direction de la deuxième bobine, b la distance de la fin de zone tournée vers la deuxième bobine de la zone spatiale définie par rapport à la position de consigne et f la distance de la fin de zone tournée vers la première bobine de la zone spatiale définie par rapport à la position de consigne, d et f étant des nombre négatifs en raison de la convention de signe (chiffres positifs de la position de consigne en direction de la deuxième bobine).
  3. Procédé selon une des revendications 1 ou 2, caractérisé en ce que le générateur de courant respectif règle à l'aide d'un régulateur de générateur de courant un (le) courant de consigne qui lui est amené.
  4. Procédé selon une des revendications 1 à 3, caractérisé en ce que le courant de consigne amené au premier générateur de courant est formé dans un premier dispositif de formation de valeur de consigne à partir d'un signal de valeur de consigne intermédiaire d'ordre supérieur qui est aussi amené à un deuxième dispositif de formation de valeur de consigne qui forme à partir du signal de valeur de consigne intermédiaire le courant de consigne amené au deuxième générateur de courant.
  5. Procédé selon la revendication 4, caractérisé en ce que le signal de valeur de consigne intermédiaire d'ordre supérieur est formé dans un régulateur de position à partir de la différence d'une valeur de consigne de position et du résultat de mesure du capteur de position ou du résultat de mesure d'un analyseur de distance.
  6. Procédé selon la revendication 5, caractérisé en ce que le courant de consigne I1 amené à la première bobine et le courant de consigne I2 amené à la deuxième bobine sont formés de la façon suivante : pour I < -I01 I1 = 0 pour I > -I01 I1 = I01 + a1I pour I > I02 I2 = 0 pour 1 < I02 I2 = I02 - a2I
    où I01 = I02 = I0 est le courant de polarisation de la bobine et I le signal de valeur de consigne intermédiaire généré dans le régulateur de position.
  7. Procédé selon la revendication 6, caractérisé en ce que les pentes a1 et a2 sont réglables de manière variable.
  8. Procédé selon la revendication 6 ou 7, caractérisé en ce que les valeurs I01 et I02 sont réglables de manière variable.
  9. Procédé selon une des revendications 1 à 8, caractérisé en ce qu'au moins deux bobines disposées d'un côté de la bande, côte à côte dans la direction de la largeur de bande, sont soumises à un courant.
  10. Procédé selon la revendication 9, caractérisé en ce que le courant amené aux bobines disposées côte à côte est différent.
  11. Procédé selon une des revendications 1 à 10, caractérisé en ce que la position d'au moins une bobine est modifiée.
  12. Procédé selon la revendication 11, caractérisé en ce que la bobine est rapprochée de la bande en partant d'une distance initiale.
  13. Procédé selon la revendication 11 ou 12, caractérisé en ce que la position de la bobine est réglée en fonction de la vibration et/ou de la position de la bande.
  14. Procédé selon une des revendications 1 à 13, caractérisé en ce qu'un analyseur de distance détermine la distance de la bande par rapport à la bobine sur la base du courant de bobine.
EP05791537A 2004-08-24 2005-08-24 Procede de guidage d'une bande et mise en oeuvre dudit procede Not-in-force EP1781834B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102004041111 2004-08-24
DE102004045035 2004-09-15
DE102004061114A DE102004061114A1 (de) 2004-08-24 2004-12-16 Verfahren zur Führung eines Bandes und Verwendung für ein solches Verfahren
PCT/EP2005/009138 WO2006021436A1 (fr) 2004-08-24 2005-08-24 Procede de guidage d'une bande et mise en oeuvre dudit procede

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DE19535854C2 (de) * 1995-09-18 1997-12-11 Mannesmann Ag Verfahren zur Bandstabilisierung in einer Anlage zum Beschichten von bandförmigem Gut
GB2334351B (en) 1998-02-11 2002-04-17 British Steel Plc Controlling webs
JP2000053295A (ja) * 1998-08-12 2000-02-22 Nkk Corp 帯状鋼板の振動低減装置
TW476679B (en) * 1999-05-26 2002-02-21 Shinko Electric Co Ltd Device for suppressing the vibration of a steel plate
SE519928C2 (sv) * 2000-08-11 2003-04-29 Abb Ab Anordning och förfarande för stabilisering av ett långsträckt metalliskt föremål
WO2002077313A1 (fr) * 2001-03-15 2002-10-03 Nkk Corporation Procede de production d'une bande metallique par immersion a chaud et dispositif correspondant
JP2004027315A (ja) * 2002-06-27 2004-01-29 Jfe Steel Kk 溶融金属めっき鋼板の製造方法および製造装置

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WO2006021436A1 (fr) 2006-03-02
ATE534757T1 (de) 2011-12-15
DE102004061114A1 (de) 2006-03-02

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