EP1863945A1 - Procede et dispositif pour appliquer un revetement sur une bande metallique, par immersion a chaud - Google Patents

Procede et dispositif pour appliquer un revetement sur une bande metallique, par immersion a chaud

Info

Publication number
EP1863945A1
EP1863945A1 EP06723813A EP06723813A EP1863945A1 EP 1863945 A1 EP1863945 A1 EP 1863945A1 EP 06723813 A EP06723813 A EP 06723813A EP 06723813 A EP06723813 A EP 06723813A EP 1863945 A1 EP1863945 A1 EP 1863945A1
Authority
EP
European Patent Office
Prior art keywords
metal strip
guide channel
force
inductors
metal
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.)
Withdrawn
Application number
EP06723813A
Other languages
German (de)
English (en)
Inventor
Holger Behrens
Rolf Brisberger
Olaf Norman Jepsen
Michael Zielenbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Demag AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1863945A1 publication Critical patent/EP1863945A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B21C47/28—Drums or other coil-holders
    • B21C47/30—Drums or other coil-holders expansible or contractible
    • 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
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/24—Removing excess of molten coatings; Controlling or regulating the coating thickness using magnetic or electric fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/02—Supporting web roll
    • B65H18/04—Interior-supporting

Definitions

  • the invention relates to a process for hot dip coating of a metal strip, in particular a steel strip, in which the metal strip is passed vertically through a container receiving the molten coating metal and through an upstream guide channel, wherein for the retention of the coating metal in the container in the region of the guide channel an electromagnetic field by means of at least two inductors arranged on both sides of the metal strip are produced and wherein the electromagnetic excitation of the inductors is changed to stabilize the metal strip in a central position in the guide channel and / or an electromagnetic field superimposed on the electromagnetic field of the inductors is generated by means of at least two correction coils arranged on both sides of the metal strip. Furthermore, the invention relates to a device for hot dip coating a metal strip.
  • the coating metal is in liquid form and one would like to use gravity together with blowers to adjust the coating thickness, but subsequent processes prohibit belt contact until complete solidification of the coating metal, the belt in the coating vessel must be deflected in the vertical direction. This happens with a roller that runs in liquid metal. Due to the liquid coating metal, this roller is subject to heavy wear and is the cause of downtimes and thus failures in production.
  • non-ferromagnetic metal strips are thus possible in a particularly good manner, but occur in the substantially ferromagnetic steel strips in that problems that this drawn in the electromagnetic seals by the ferromagnetism to the channel walls and the strip surface is damaged.
  • the magnetic induction which is responsible for the magnetic attraction force, decreases in terms of its field strength according to an expo- nential function with the distance from the inductor.
  • the attraction force decreases with the square of the induction field strength with increasing distance from the inductor.
  • EP 0 854 940 B1 uses a method for stabilizing the strip, in which the common use of the coils for the wall derfeld for sealing and band stabilization takes place, wherein the control of the magnetic field whose field strength or its frequency is adjustable in dependence on a sensory detected tape position in the coating channel, the modulation of the electromagnetic traveling field is superimposed.
  • the control of electromagnetic additional or correction coils is provided for stabilizing the center position of the metal strip in the guide channel, wherein initially measured the position of the metal strip in the guide channel and after the measurement of the induction currents in the inductors and in the auxiliary coils on the induction current is acted upon in the auxiliary coils in dependence of the measured parameters in order to keep the metal strip in a central position in the guide channel.
  • WO 2004/050941 A1 To determine the position of the metal strip in the guide channel for the purpose of its central position control WO 2004/050941 A1 provides two coils, which are arranged in the conveying direction of the metal strip within the vertical extent of the inductors between the inductors and the metal strip, wherein the voltage induced in the coil is measured in order to obtain an indication of the actual position of the metal strip in the guide channel.
  • the invention is therefore based on the object to provide a method and an associated apparatus for hot dip coating a metal strip, with which or with which it is possible to overcome the disadvantages mentioned Ü.
  • the efficiency of the scheme should therefore be improved, which should be possible in a simpler way to keep the metal strip in the middle of the guide channel.
  • the idea of the invention is therefore based on the idea of basing the center control by means of per se known influencing of the inductor and / or correction coil currents on the horizontal force exerted by the metal strip on a force measuring element when it leaves the center position. It is therefore - in contrast to previously known solutions - not measured the deflection of the center position itself.
  • a first procedural training provides that the measurement of the horizontal force acting below the guide channel.
  • the electromagnetic field generated for sealing a multi-phase traveling field which is generated by applying an alternating current with a frequency between 2 Hz and 2 kHz.
  • a single-phase alternating field can be provided, which is generated by applying an alternating current with a frequency between 2 kHz and 10 kHz.
  • the apparatus for hot-dip coating a metal strip in particular a steel strip, in which the metal strip is passed vertically through a container receiving the molten coating metal and through an upstream guide channel, has at least two inductors arranged on both sides of the metal strip in the region of the guide channel for generating an electromagnetic field for retaining the coating metal in the container and is inventively characterized by at least one force measuring element for measuring the force acting in horizontal direction, which exerts the metal strip on leaving the central position in the guide channel on the force measuring element, and by control means for controlling the induction current in the at least an inductor depending on the measured force are suitable.
  • control means are suitable for controlling their induction current.
  • the force measuring element is designed as a tape guide roller, which is provided with a force transducer.
  • the force transducer can be designed as strain gauges.
  • the force measuring element is advantageously arranged below the guide channel.
  • a force-measuring element is arranged on each side of the metal strip.
  • the invention proposal is achieved that a simple calibration of the measuring arrangement is possible. Furthermore, the proposed arrangement is very prone to interference, since no particularly sensitive sensors are needed. If, for example, the force measuring elements are equipped with strain gauges (DMS), a high-precision force measurement under harsh environmental conditions is nevertheless easily possible.
  • DMS strain gauges
  • the measuring elements which are suitable for measuring the force are generally known, so that extensive operating experience is available so that it is ensured that the measuring elements are well suited for continuous operation.
  • the ribbon surface and the environment do not play a significant role in stabilizing the ribbon in the mid-plane. Neither the liquid coating metal nor the glossy tape surface and the strong magnetic field disturb the process. The system works so very susceptible to interference.
  • FIG. 1 An embodiment of the invention is shown.
  • the single figure shows schematically a hot-dip coating device with a guided through this metal strip.
  • the hot-dip coating apparatus has a container 3 filled with molten coating metal 2.
  • molten coating metal 2 This may, for example, be zinc or aluminum.
  • To be coated metal strip 1 in the form of a steel strip passes through the container 3 in the conveying direction F vertically upwards. It should be noted at this point that, in principle, it is also possible that the metal strip 1 passes through the container 3 from top to bottom. For the passage of the metal strip 1 through the container 3 is den- open in the floor area. Here is an exaggeratedly large or broad guide channel. 4
  • the molten coating metal 2 can not flow down through the guide channel 4, located on both sides of the metal strip 1 two electromagnetic inductors 5, which generate a magnetic field, which counteracts the gravity of the coating metal 2 and thus seals the guide channel 4 downwards.
  • the inductors are supplied by supply means, not shown, with the inductor current Ii.
  • the inductors 5 are two alternating field or traveling field inductors arranged opposite the band 1, which are operated in the frequency range from 2 Hz to 10 kHz and establish an electromagnetic transverse field perpendicular to the conveying direction F.
  • the preferred frequency range for single-phase systems (AC field inductors) is between 2 kHz and 10 kHz, that for multi-phase systems (eg traveling field inductors) between 2 Hz and 2 kHz.
  • the aim is to keep the metal band 1 located in the guide channel 4 so that it lies as accurately as possible in the center plane 10 of the guide channel 4.
  • the metal band 1 is drawn with solid lines in this center plane 10 lying.
  • the metal strip 1 located between the two opposing inductors 5 is generally drawn between the inductors 5 to the closer inductor upon application of an electromagnetic field, the attraction increasing as it approaches an inductor, resulting in a highly unstable tape center position.
  • This results in the operation of the device has the problem that the metal strip 1 due to the attraction of the inductors 5 can not run freely and centrally through the guide channel 4 between the activated inductors 5.
  • correction coils 6 are therefore arranged on both sides of the guide channel 4 and der Metallbandes 1. These are controlled by a control means 8 so that the superposition of the magnetic fields of the inductors 5 and the correction coils 6, the metal strip 1 always holds in the middle of the guide channel 4.
  • the correction coils 6 so the magnetic field of the inductors 5 can be amplified or attenuated depending on the control (superposition principle of the magnetic fields). In this way, the position of the metal strip 1 in the guide channel 4 can be influenced.
  • Each force measuring element has a tape guide roller 11 which bears against the metal strip 1. Between the tape guide roller 11 and the (only schematically shown) support 12 of the roller 11, a force transducer 9 in the form of a strain gauge (DMS) is arranged. With this it is possible to measure the magnitude of the horizontal force FH that exerts the tape 1 on the force measuring element 7. For this purpose, a position of the metal strip 1 is shown in the figure with dashed lines, in which the band is not centrally in the guide channel 4, but (exaggerated strongly drawn) is deflected to the right of the center plane 10.
  • DMS strain gauge
  • the load cell registers a horizontal force not equal to zero.
  • the measured value is forwarded to the control means 8.
  • the control means 8 thus receive as input the value and the direction of the horizontally acting force FH.
  • the control means 8 algorithms are stored, the basis of the present horizontal force FH the Induction current IK in the correction coils 6 influence. If, for example, as shown in the figure, a band deflection from the midplane 10 to the right is present, a horizontal force - measured by the right force-measuring element 7 - results to the right.
  • the control means 8 control this via an increased induction current IK for the left-hand correction coil 6, with the result that the band 1 is drawn more strongly to the left and thus moves back to the desired position (center plane 10). In this way, the position of the metal strip 1 is held in the closed loop so that the positional deviations of the metal strip 1 from the center plane 10 are minimal.
  • the nominal value for the position control can then be any force value between the two limit values, ideally the mid-position according to the mid-plane 10. A contact of the metal strip 1 with the wall of the guide channel 4 thus does not occur in proper execution of the invention, so that a high-quality hot-dip coating can be achieved.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Winding Of Webs (AREA)

Abstract

L'invention concerne un procédé pour appliquer un revêtement sur une bande métallique (1), en particulier une bande d'acier, par immersion à chaud. Selon ce procédé, la bande métallique (1) est guidée verticalement à travers un récipient (3) contenant le métal de revêtement fondu (2), et à travers un canal de guidage (4) placé an amont. Selon l'invention, pour maintenir le métal de revêtement (2) dans le récipient (3) dans la zone du canal de guidage (4), un champ électromagnétique est généré à l'aide d'au moins deux inducteurs (5) disposés de part et d'autre de la bande métallique (1). De plus, pour stabiliser la bande métallique (1) dans une position centrale au sein du canal de guidage (4), l'excitation électromagnétique des inducteurs (5) est modifiée, et/ou un champ électromagnétique qui recouvre le champ électromagnétique des inducteurs (5) est généré à l'aide d'au moins deux bobines de correction (6) qui sont disposées de part et d'autre de la bande métallique (1). Pour pouvoir régler le centrage de la bande métallique d'une manière non sensible aux parasites, la position centrale de la bande métallique (1) dans le canal de guidage (4) est stabilisée par une succession d'étapes, dans une boucle d'asservissement fermée, qui consistent : a) à mesurer la force (FH) exercée par la bande métallique (1) sur un élément de mesure de force (7), dans la direction horizontale, lorsque la bande métallique quitte sa position centrale ; b) à agir sur le courant d'induction (I<SUB>I</SUB>) dans les inducteurs (5) et/ou sur le courant d'induction (I<SUB>K</SUB>) dans les bobines de correction (6), en fonction de la force mesurée (FH), pour maintenir la bande métallique (1) dans une position centrale dans le canal de guidage (4). La présente invention se rapporte en outre à un dispositif pour appliquer un revêtement sur une bande métallique par immersion à chaud.
EP06723813A 2005-03-30 2006-03-29 Procede et dispositif pour appliquer un revetement sur une bande metallique, par immersion a chaud Withdrawn EP1863945A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005014878A DE102005014878A1 (de) 2005-03-30 2005-03-30 Verfahren und Vorrichtung zur Schmelztauchbeschichtung eines Metallbandes
PCT/EP2006/002844 WO2006103050A1 (fr) 2005-03-30 2006-03-29 Procede et dispositif pour appliquer un revetement sur une bande metallique, par immersion a chaud

Publications (1)

Publication Number Publication Date
EP1863945A1 true EP1863945A1 (fr) 2007-12-12

Family

ID=36570314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06723813A Withdrawn EP1863945A1 (fr) 2005-03-30 2006-03-29 Procede et dispositif pour appliquer un revetement sur une bande metallique, par immersion a chaud

Country Status (13)

Country Link
US (2) US20090280270A1 (fr)
EP (1) EP1863945A1 (fr)
JP (1) JP4521782B2 (fr)
KR (1) KR20070102599A (fr)
CN (1) CN101151396B (fr)
AU (1) AU2006228695A1 (fr)
BR (1) BRPI0608946A2 (fr)
CA (1) CA2602656A1 (fr)
DE (1) DE102005014878A1 (fr)
MX (1) MX2007011791A (fr)
RU (1) RU2346076C1 (fr)
TW (1) TW200643216A (fr)
WO (1) WO2006103050A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008008755B4 (de) * 2008-02-12 2013-10-24 Sms Elotherm Gmbh Vorrichtung, Verfahren und System zur elektromagnetischen Lagebeeinflussung eines beweglichen Materials
DE102008010653B4 (de) * 2008-02-22 2019-04-04 Outokumpu Nirosta Gmbh Verfahren und Zwei-Walzen-Gießmaschine zum Herstellen von aus einer Metallschmelze gegossenem Band
DE102014225516B3 (de) * 2014-11-21 2016-03-31 Fontaine Engineering Und Maschinen Gmbh Verfahren und Vorrichtung zum Beschichten eines Metallbandes
DE102017109559B3 (de) * 2017-05-04 2018-07-26 Fontaine Engineering Und Maschinen Gmbh Vorrichtung zum Behandeln eines Metallbandes
CN107604298B (zh) * 2017-08-30 2019-08-27 唐山瑞丰钢铁（集团）有限公司 一种金属带热浸涂加工装置
DE102018215100A1 (de) * 2018-05-28 2019-11-28 Sms Group Gmbh Vakuumbeschichtungsanlage, und Verfahren zum Beschichten eines bandförmigen Materials
CN109226268A (zh) * 2018-11-09 2019-01-18 衡阳中钢衡重设备有限公司 用于热轧卷筒的新型干油润滑装置
CN111926279B (zh) * 2020-09-30 2021-01-05 华中科技大学 一种热浸镀的双频电磁场协同封流装置及系统
CN114754278A (zh) * 2021-01-11 2022-07-15 宝钢日铁汽车板有限公司 一种废边卷球机芯轴自动润滑系统

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Also Published As

Publication number Publication date
MX2007011791A (es) 2007-12-05
RU2346076C1 (ru) 2009-02-10
US20070220940A1 (en) 2007-09-27
US20090280270A1 (en) 2009-11-12
CN101151396A (zh) 2008-03-26
JP4521782B2 (ja) 2010-08-11
CN101151396B (zh) 2010-09-29
AU2006228695A1 (en) 2006-10-05
DE102005014878A1 (de) 2006-10-05
US7454937B2 (en) 2008-11-25
KR20070102599A (ko) 2007-10-18
WO2006103050A1 (fr) 2006-10-05
BRPI0608946A2 (pt) 2010-02-17
JP2008534779A (ja) 2008-08-28
TW200643216A (en) 2006-12-16
CA2602656A1 (fr) 2006-10-05

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