EP3025799B1 - Installation de laminage et inductance longitudinale pour l'usage dans une telle installation de laminage - Google Patents

Installation de laminage et inductance longitudinale pour l'usage dans une telle installation de laminage Download PDF

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Publication number
EP3025799B1
EP3025799B1 EP14195442.0A EP14195442A EP3025799B1 EP 3025799 B1 EP3025799 B1 EP 3025799B1 EP 14195442 A EP14195442 A EP 14195442A EP 3025799 B1 EP3025799 B1 EP 3025799B1
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EP
European Patent Office
Prior art keywords
metal strip
field inductor
inductor
rolling mill
longitudinal
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EP14195442.0A
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German (de)
English (en)
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EP3025799B2 (fr
EP3025799A1 (fr
Inventor
Jürgen Seidel
Volker Kunze
Markus LANGEJÜRGEN
Andreas Piehlk
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SMS Group GmbH
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SMS Group GmbH
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Application filed by SMS Group GmbH filed Critical SMS Group GmbH
Priority to EP14195442.0A priority Critical patent/EP3025799B2/fr
Priority to PCT/EP2015/077616 priority patent/WO2016083439A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill

Definitions

  • the invention relates to a rolling mill comprising at least a first and a second rolling stand, at least one arranged between the first and the second roll stand inductor for heating a metal belt moved by the inductor, wherein the inductor, an upper induction coil, which is arranged above the metal strip to be heated and a lower induction coil disposed below the metal strip to be heated and opposite to the upper induction coil.
  • the rolling mill comprises a power supply device for supplying the upper and the lower induction coil with electrical energy.
  • the invention relates to a casting-rolling plant with a casting machine for producing the metal strip and a rolling mill downstream of the casting machine in the material flow direction according to the invention.
  • the invention finally also relates to a method for producing a metal strip.
  • Inductors for heating metal strip are known in the art in principle, such. B. from the GB 770,548 , of the JP 022 07 481 , of the JP 06122928 , of the JP 2000-252050 , of the JP 2004 306069-71 , of the WO 2010 036987 A2 and the WO 2014 021596 , The cited documents describe further remote prior art.
  • JP 4172122 discloses vertically engageable inductor halves which are moved vertically when a ski is detected at the head of a metal strip with the aid of a camera to avoid collision of the metal strip with the inductor.
  • the upper and lower induction coils are moved vertically according to a measured tape position.
  • the said Japanese application speaks only of an inductor without distinguishing between transverse field or longitudinal field inductors.
  • the US 5,495,094 discloses inductor loops with a 180 ° phase shift, which thus represent a longitudinal field inductor.
  • the inductor loops are each independently adjustable perpendicular to a stationary workpiece to be heated.
  • FIG. 9 shows the structure and operation of a known Querfeldinduktors 180. It includes an upper transverse field induction coil 182, which is associated with the top of the metal strip 200. In addition, the transverse field inductor comprises a lower transverse field induction coil 184, which is associated with the underside of the metal strip 200. As in FIG. 9 2, the opening cross-sections of the upper and lower transverse field inductor coils are opposite to each other and parallel to the metal strip 200. The magnetic field lines generated in operation of the inductor are shown in FIG FIG. 9 also shown symbolically.
  • the upper and lower Querfeldinduktorspule 182, 184 are each independently movable perpendicular to the plane of the metal strip 200, that is adjustable.
  • the magnetic field or the magnetic flux acts primarily perpendicular to the plane of the metal strip.
  • the split arrangement of the coils advantageously makes it possible for the two induction coils, ie for both inductor halves, to be arranged independently of one another perpendicularly to the plane of the metal strip and for the inductor to be formed laterally open. In the event of a fault, the distance between the coils and the metal strip can therefore be increased slightly and / or the inductor can be moved out of the line of the metal strip.
  • FIG. 8 shows an example of a known L Lucassfeldinduktor, which is typically formed as a closed frame.
  • the metal strip to be heated therefore passes through a closed rectangular gap when passing through the known longitudinal field inductor.
  • FIG. 8 can be seen, generates the Leksfeldinduktor substantially a magnetic field in the transport direction of the metal strip to be heated.
  • transverse and longitudinal field inductors are also from the WO 2014 021596 known.
  • the Japanese patent application JP 61195708 discloses a transverse field inductor with coils opposite the top and bottom of a metal strip to uniformly heat the metal strip.
  • the part of the inductor associated with the upper side of the metal strip and the part of the inductor associated with the underside of the metal strip are each associated with displacement means for moving the respective parts of the inductor perpendicular to the surface of the metal strip as a function of detected unevennesses in the metal strip perpendicular to its surface to proceed.
  • the European patent application EP 2 340 897 A1 discloses a rolling mill with a roughing stand and at least one stand of a finishing train and with a arranged between the two stands L jossfeldinduktor for heating the moving through the Lssensfeldinduktor metal strip.
  • the Leksfeldinduktor has an upper induction coil, which is assigned above the metal strip to be heated, and a lower induction coil, which is disposed below the metal strip to be heated opposite to the upper induction coil.
  • EP 2 340 897 A1 also a power supply device for supplying the induction coils of the Lssensfeldinduktors with electrical energy.
  • the preamble of claims 1 and 28 is based on EP 2 340 897 A1 .
  • the invention has the object of developing a known rolling mill, a known casting-rolling plant and a known method for producing a metal strip to the effect that in particular thicker metal strip with thicknesses, for example> 6 mm heated and rolled particularly effectively, ie using as little electrical energy as possible.
  • the main advantage of the invention of a new induction heating for a rolling mill, in particular a hot strip mill, is to combine the advantages of the inductor types described above, namely the possibility of adjusting the upper and lower inductor coils and the efficient heating of thicker strips or slabs.
  • the adjustability of the split longitudinal field inductors makes sense in thickness variations of ⁇ H ⁇ 6 mm or more preferably ⁇ H ⁇ 15 mm.
  • the further claimed mobility of the upper and lower induction coil perpendicular to the plane of the metal strip allows the advantage that the distance between the two coils to the metal strip can be adjusted individually optimally with regard to the respective metal strip thickness, so that as possible effective heat transfer into the metal strip is possible.
  • a distance of less than 60 mm, preferably less than 20 mm in each case an induction coil to the metal strip is sought.
  • a minimum distance of 15 mm has been shown.
  • the power supply device has upper capacitors, which are connected to the upper induction coil to an upper part of the resonant circuit, and the power supply device lower capacitors, which are connected to the lower induction coil to a lower resonant circuit.
  • the upper L jossfeldinduktor-displacement device is then designed for moving the upper part of the resonant circuit perpendicular to the top of the metal strip and / or the lower Lssensfeldinduktor-displacement device is then designed for moving the lower resonant circuit perpendicular to the underside of the metal strip.
  • the inductor ie the longitudinal field inductor
  • This advantageously also allows the transverse process of the Leksfeldinduktors in and out of the line of the metal strip.
  • the possibility from the line of Pulling out metal strip is particularly advantageous in case of a fault in the rolling mill or in the presence of a wave in the metal strip or in the presence of a ski at the head of the metal strip.
  • the upper and the lower induction coil can each be formed from a single turn or from a plurality of parallel and preferably cross-connected partial turns.
  • the provision of a single turn is often chosen at high frequencies.
  • This technique which is known from the field of electric motor technology, ensures that an external conductor is arranged in the forward conductor and the return conductor inside. By this crosswise interconnection, the current load of the parallel conductor is made uniform. Since the conductors must cross at the winding heads, they should be carried out particularly Streufeldarm. The cross-connection also equal Operainduktterrorismen be achieved.
  • the power supply device is advantageously designed to operate the induction coils and the partial resonant circuits - depending on the thickness of the metal strip - with current or voltage frequencies between 2 kHz and 30 kHz. The frequency increases with decreasing strip thickness.
  • the number of partial turns per induction coil is between 3 and 15.
  • the complexity of the inductor increases with a larger number of partial turns.
  • the inductor windings are typically covered with laminations of laminated, laminated electrical sheets to reduce stray field. This measure is useful and necessary because the upper and lower induction coils are installed in close proximity to other rolling mill components. Because the others Rolling mill components are made almost exclusively from ferritic materials, no stray field must emerge from the induction coils of the longitudinal field or transverse field inductor and also heat up the other rolling mill components.
  • the claimed Leksfeldinduktor between the at least one roughing stand and the first rolling mill of the finishing train and at least one Querfeldinduktor be provided in the rolling mill, which can then be operated in addition to the at least one Leksfeldinduktor.
  • the transverse field inductors are not only intended to heat the center of the tape, but at the same time, the strip edges are increasingly heated to efficiently produce a uniform strip temperature over the finished strip width.
  • An upper Querfeldinduktorspule or an upper Querfeldinduktor-part resonant circuit and a lower Querfeldinduktorspule and a lower Querfeldinduktor-part of the Querfeldinduktors are then also by means of associated Querfeldinduktor-displacement each perpendicular to the plane spanned by the metal strip plane and / or transversely to the longitudinal direction of the metal strip ,
  • the upper and lower Querfeldinduktor-displacement device and / or the upper and / or lower Leksfeldinduktor-displacement device are typically controlled by a control device.
  • a temperature measuring device may be provided for detecting the distribution of the temperature of the metal strip over its width, and the control device may then be designed to control the upper and / or lower L Lucassfeldinduktor-displacement device, the upper and / or lower Querfeldinduktor-displacement device and / or an inductor carriage such that the longitudinal field inductor or the transverse field inductor can be positioned in response to the measured temperature distribution such that the difference between the measured temperature distribution and a predetermined desired temperature distribution over the width of the metal strip behind the finishing train is minimal.
  • Several longitudinal field or transverse field inductors may preferably be distributed over the length of the system.
  • a sensor device may be provided for detecting an irregularity in the metal strip, such as a ski at the head of the metal strip, a wave or a bow in the metal strip or any other disturbance of the rolling process.
  • the control device is designed to control the upper and / or lower L Lucassfeldinduktor-displacement device and / or the upper and / or lower Querfeldinduktor-displacement device and / or the induction trolley such that the distance of the induction coil from the top or bottom of the Metal strip is suitably changed in the range of irregularity and / or the inductors are moved out of the line of the metal strip out.
  • At least one touch sensor may be provided for detecting a contact of the Leksfeldinduktors and / or Querfeldinduktors by the metal strip.
  • the control device is designed to control the traversing devices such that the longitudinal field inductor and / or the transverse field inductor is opened in the thickness direction and / or is moved laterally out of the line of the metal strip.
  • An oven can be connected between the caster and the rolling train, and advantageously, for further heating, a further longitudinal field inductor and / or the transverse field inductor can be connected between the furnace and the roughing stand.
  • a further longitudinal field inductor and / or the transverse field inductor can be connected between the furnace and the roughing stand.
  • Particularly advantageous is the arrangement of the further L Lucassfeldinduktors between the furnace and the at least one roughing stand, and the arrangement of the Leksfeldinduktors between the roughing stand and the first stand of the finishing train and the arrangement of a transverse field inductor between individual stands of the finishing train.
  • a longitudinal field inductor according to the invention for use in a rolling mill is the subject of claim 28.
  • the advantages of these procedural solutions correspond to the advantages mentioned above with respect to the rolling mill and the casting-rolling plant.
  • split, engageable induction coils of the longitudinal field inductor is particularly suitable for thicknesses of the metal strip> 6 mm, because in this thickness range, the non-closed L Lucassfeldinduktor invention provides better efficiency than the Querfeldinduktor and / or formed with a frame structure closed L Lucassfeldinduktor.
  • the split, adjustable L Lucassfeldinduktor invention is preferably used at a belt temperature range of> 750 ° C. It is particularly suitable for continuous rolling (definition see below) or for conventional rolling of flat products in a hot strip mill.
  • a safety distance of the induction coil to the metal strip may be more than 100 mm, in exceptional cases, more than 500 mm.
  • the split, engageable longitudinal and transverse field inductors are preferably used in an endless casting-rolling process.
  • the casting plant and the rolling mill are connected via the cast strand. Both systems are then coupled and work with the same mass flow.
  • This process has to be started sometime and it is then that an induction heater, which consists of split inductors (top, bottom), which are adjustable and laterally open, particularly advantageous.
  • This construction is also advantageous during the start-up and Ausfädel perspectives or in a fault situation.
  • engageable inductors preferably takes place in continuous strip casting processes, in particular between two finishing stands, which have a stand spacing of 5 m to ⁇ 40 m and which are operated in endless mode.
  • the belt areas of different belt temperature are tracked through the rolling train and taken into account the effect of temperature differences on the framework load and scaffolding. That is, the cold one
  • the tape head is set to a higher tape thickness and limits the decreases and so z.
  • B. the framework load is kept within acceptable limits.
  • FIG. 1 shows an exemplary embodiment of the rolling mill 400 according to the invention. It comprises a roughing stand 420 and a finishing mill 440 which is connected downstream of the roughing stand in the material flow direction and has the finishing rolling stands F1-F N. In the material flow direction R, the rolling mill 400 includes a cooling device 450 and a coiler 460 behind the finishing train 440.
  • a longitudinal field inductor 170 designed according to the invention is arranged between the roughing stand 420 and the first rolling stand F1 of the finishing train 440.
  • transverse field inductors 180 or further longitudinal field inductors 170 may be arranged in front of the finishing train and / or between individual stands of the finishing train 440.
  • FIG. 2 illustrates the operation of the longitudinal field inductor 170: Without the presence of the Leksfeldinduktors 170, the temperature of the metal strip in z. B. the conventional rolling mill according to the solid line in FIG. 2 before the entry into the first stand F1 of the finishing train 440 from the tape head to the end of the tape fall off sharply. This would result in the disadvantages mentioned in the general part of the description.
  • the Leksfeldinduktor invention causes between the roughing stand 420 and the First stand F1 of the finishing train 440 that the temperature of the metal strip 200 from the tape head to the end of the tape can be kept at a high level constant, as in FIG. 2 indicated by the horizontal dashed line.
  • the tape head can run out with a ski. This is eliminated or reduced according to the prior art before the induction heating with a roller leveler. If this does not succeed and a ski is still detected, the opening band is moved back and deported. This is disadvantageous.
  • a split longitudinal field inductor whose opening width can be increased (lifting the upper inductor and / or lowering the lower inductor) can ensure safe transport through the induction heating section primarily at the head.
  • the inductor distance is increased.
  • the inductor can then be closed again and the pre-strip heated. It can be dispensed with a Rollenrichtmaschine or other measures in front of a split, engageable L jossfeldindutechnischmaschineung if at each skafteftten not to be heated tape head of the inductor gap is increased.
  • FIG. 3 It shows an upper induction coil 110, which is arranged above the metal strip 200 to be heated, and a lower induction coil 120, which is arranged below the metal strip to be heated, opposite the upper induction coil 110.
  • the two induction coils 110, 120 are fed by a power supply device 130 with electrical energy, more precisely, with out-of-phase electrical currents. Due to this operation of the upper and lower induction coil with antiphase currents, the inductor 100 acts as a longitudinal field inductor 170. In contrast to traditional longitudinal field inductors, the in FIG.
  • FIG. 4 illustrates that the upper induction coil 110 is typically associated with an upper capacitor 115, wherein the upper induction coil and the upper capacitor 115 are connected to an upper part of the resonant circuit.
  • the lower inductor is connected to an associated capacitor 125 to a lower resonant circuit.
  • the upper resonant circuit is associated with an upper longitudinal field inductor 140 for moving the upper resonant circuit or at least the upper coil 110 perpendicular to the plane formed by the metal strip 200.
  • a lower L Lucassfeldinduktor-displacement device 150 is assigned to the lower part of the resonant circuit for moving the lower resonant circuit or at least the lower induction coil 120 perpendicular to the plane spanned by the metal strip 200 level.
  • the upper and lower induction coils 110, 120 of the longitudinal field inductor 100, 170 or their housings are as in FIG FIG. 4 shown, C-shaped for transverse movement of the inductor by means of the Induktorwagens 142 or a similar Querverfahrmechanismus in or out of the line of the metal strip 200.
  • the line corresponds to the material flow direction R, which in FIG. 4 directed into or out of the drawing plane.
  • the rolling mill 400 may include a transverse field inductor 180.
  • the Querfeldinduktor is in a known manner, as in the prior art with reference to FIG. 9 described, trained. The arrangement described above with respect to the L Lucassfeldinduktor 100, 170 according to FIG. 4 Similarly, the Querfeldinduktor 180. Concretely, the Querfeldinduktor 180 comprises a top of the metal strip 200 associated upper Querfeldinduktorspule 182 and one of the underside of the metal strip 200 associated lower Querfeldinduktorspule 184.
  • the Querfeldinduktorspulen 182, 184 capacitors 115, 125 may be assigned, which form part resonant circuits together with the inductor coils.
  • An upper transverse field inductor traverse device 186 is provided for moving the upper cross field inductor coil 182 and the upper transverse field inductor partial resonant circuit, respectively, perpendicular to the plane defined by the metal strip.
  • a lower transverse field inductor shuttle 188 is provided for moving the lower transverse field inductor coil 184 and the lower transverse field inductor partial resonant circuit, respectively, also perpendicular to the plane defined by the metal strip.
  • the upper and lower transverse field inductor traversers 186, 188 and / or the upper and lower longitudinal field inductor traversers 140, 150 may form a structural unit.
  • This structural unit is preferably associated with an inductor carriage 142 for moving the longitudinal field inductor and / or the transverse field inductor transversely to the longitudinal direction of the metal strip out of the line of the metal strip or into the line of the metal strip 200.
  • the Querfeldinduktor-displacement devices 186, 188 and / or the Leksfeldinduktor-displacement devices 140, 150 or the Induktorwagen 142 are controlled by a control device 187; please refer FIG. 4 ,
  • FIG. 5 shows a top view of the metal strip 200. It can be seen a temperature measuring device 190 and optionally 550 for detecting the distribution of the temperature over its width.
  • the temperature measuring device 190 is preferably arranged behind the last rolling stand F N of the finishing train 440.
  • the measured temperature distribution is supplied as an input to the controller 187 to be responsive to the temperature distribution, the upper and / or the lower L Lucassfeldinduktor-displacement device 140, 150 and / or the upper and / or lower Querfeldinduktor-displacement device 186, 188 and / or the Induktorwagen 142 suitably controls.
  • Suitable in this case means that the inductor 100, ie the longitudinal field inductor 170 or the Querfeldinduktor 180 is positioned in response to the necessary energy input and the measured temperature distribution that the difference between the measured temperature distribution behind the finishing train 440 and a predetermined Target temperature distribution at the same position over the material width is minimal.
  • the properties of the finished product over the width can be optimally adjusted.
  • the input temperature distribution 550 is taken into account.
  • a sensor device 195 may be provided for detecting an irregularity in the metal strip 200, such as a ski z. B. at the head of the metal strip, a wave or a bow in the metal strip or a other disturbance of the rolling process.
  • the sensor device 187 is then designed in response to a signal of the sensor device, which represents the irregularity, for driving the L jossfeldinduktor-displacement devices 140, 150 and / or the Querfeldinduktor-displacement devices 186, 188 or the Induktorwagens 142 such that the distance d of the inductor coils is changed suitably from the top / bottom of the metal strip in the region of the irregularity and / or the inductors are moved out of the line of the metal strip out.
  • At least one touch sensor 198 may be provided, e.g. In the form of a motion sensor or an accelerometer for detecting contact of the longitudinal field inductor 170 and / or the transverse field inductor 180 with the metal strip 200.
  • the controller 187 is then configured to drive the in response to a signal from the touch sensor representing the eventual touch L jossfeldinduktor-displacement devices 140, 150 and / or the Querfeldinduktor-displacement devices 186, 188 and / or the Induktorwagens 142 such that the Leksfeldinduktor 100, 170 and / or the Querfeldinduktor 180 open when touching the metal strip 200 in the thickness direction and / or laterally from the Line is driven out.
  • FIG. 6 It comprises a casting machine 300 according to the invention for producing the metal strip 200 and the above-described, the casting machine 300 in the material flow direction R downstream rolling mill 400.
  • a furnace 350 switched between the casting machine 300 and the rolling mill 400.
  • the rolling mill 400 has, as already described above, a longitudinal field inductor 170 and / or a transverse field inductor 180 according to the invention between the at least one roughing stand 420 and the first stand F1 of the finishing train 440.
  • a further longitudinal field inductor 170 and / or the transverse field inductor 180 may be connected.
  • the further longitudinal field inductor 170 may also be connected between the furnace 350 and the roughing stand, and the transverse field inductor 180 may be connected between individual ones of the finishing rolling stands of the finishing train.
  • FIG. 7 illustrates the preferred application of the invention divided L Lucassfeldinduktors without frame structure, ie with individually perpendicular to the level of the metal strip engagable upper and lower induction coil.
  • the dashed lines show the course of the electrical efficiency for a L Lucassfeldinduktor closed inductor frame whose upper and lower induction coil are not adaptable to the respective thickness ratios of the metal strip.
  • the dotted line shows the course of the efficiency for a Querfeldinduktor and the two solid lines show the course of the electrical efficiency as a function of the strip thickness for a Leksfeldinduktor with advantageously individually adjustable upper and / or lower induction coil as a function of strip thickness.
  • Both the dashed lines for the closed longitudinal field inductor and the solid lines for the split longitudinal field inductor are each given for two different frequencies f j f i , f m and f n , with the different frequencies chosen optimally with respect to the band thickness ranges of use become.
  • the diagram according to FIG. 7 in that the electrical efficiency is particularly high when using transverse field inductors (dot-dashed line) for strip thicknesses ⁇ 6 mm.
  • the efficiency is particularly large when using Lekssfeldinduktoren, in which case it does not matter whether divided engageable L jossfeldinduktoren or closed Lssensfeldinduktoren be used.
  • the invention relates to a method for producing a metal strip with a rolling mill 400 according to the invention or a casting-rolling plant 500 according to the invention.
  • the rolling mill and the casting-rolling plant each comprise at least one longitudinal field inductor 170 and optionally additionally at least one transverse field inductor 180
  • the distance d of the upper and lower adjustable inductor coils of the longitudinal field inductor or the transverse field inductor during the rolling of the fillet of the metal strip 200 is set to a suitable operating distance d ⁇ 60 mm, depending on the respective thickness of the metal strip.
  • This operating distance is preferably kept constant during the rolling of the fillet at a distance of d ⁇ 20 mm.
  • a minimum distance of 15 mm has been shown.
  • the upper and / or the lower adjustable inductor coil of Leksfeldinduktors and optionally also the Querfeldinduktors are moved during the threading process of the head of the metal strip in a rolling mill either to a predefined safety distance or moved to outside the band line. Only after completion of the threading process, the induction coils, synonymous with inductor coils, set to the appropriate operating distance. Only when the respective desired operating distance d is reached or comes close to the metal strip, the inductors 100, 170, 180 are activated, that is acted upon by electrical energy.
  • the energy supply device 130 according to the invention is designed to supply all electronic components, ie in particular the induction coils and the displacement devices and the inductor carriage with electrical energy.
  • the upper and lower induction coils 110, 120, 184, 186 of the longitudinal field inductor 170 and / or the Querfeldinduktors 180 are raised again to the predefined safety distance z. B. just before the end of the metal strip 200 leaves a roll stand before the respective L jossfeldinduktor or Querfeldinduktor or when a previously existing strip tension is broken down or when a Walzunfall had happened or in another disturbance of the mass flow.
  • the induction coils can also be moved out of the line of the metal strip.
  • the casting-rolling plant is preferably operated in a continuous mode and / or in a semi-endless mode.
  • endless mode A definition of "endless mode” is given above in the general part of the description.
  • the term "semi-continuous mode” means casting a long slab that finds room in the oven 350, and then rolling and separating the slivers in front of the coiler to some coils. Depending on the length of the oven z. B. 5 consecutive slabs continuously rolled successively (similar to endless) and only behind the finishing line with the scissors divided and z. B. 5 single coils wound.

Claims (28)

  1. Laminoir (400) avec
    au moins une première cage de laminage (420) sous la forme d'une cage de dégrossissage, et une deuxième cage de laminage sous la forme d'une première cage de laminage d'une pluralité de cages de laminage d'un laminoir de finition ;
    au moins un dispositif d'induction à champ longitudinal (100,170), disposé entre la première et la seconde cage de laminoir pour chauffer une bande métallique (200) déplacée au moyen du dispositif d'induction, dans lequel le dispositif d'induction à champ longitudinal comprend une bobine supérieure d'induction (110) qui est disposée au-dessus de la bande métallique à chauffer (200) et une bobine inférieure d'induction (120) qui est disposée en dessous de la bande métallique à chauffer (200) en opposition à la bobine d'induction supérieure ; et
    un dispositif d'alimentation en énergie (130) pour alimenter en énergie électrique les bobines supérieure et inférieure d'induction du dispositif d'induction à champ longitudinal (100. 170) de manière à être alimentés avec des courants électriques en opposition de phase ;
    caractérisé en ce que
    le dispositif d'induction à champ longitudinal est séparé et ouvert latéralement;
    un dispositif supérieur de déplacement (140) du dispositif d'induction à champ longitudinal (140) est prévu pour déplacer la bobine supérieure d'induction (110) perpendiculairement à la surface supérieure de la bande métallique (200) et/ou un dispositif inférieur de déplacement (150) est prévu pour déplacer la bobine inférieure d'induction (120) perpendiculairement à la suface inférieure de la bande métallique (200); et
    la distance (d) de la bobine supérieure d'induction (110) depuis la surface supérieure de la bande métallique et/ou la distance d de la bobine inférieure d'induction (120) depuis la surface inférieure de la bande métallique, dans une position de travail, présente une valeur d < 60 mm, de préférence d < 20 mm.
  2. Laminoir (400) selon la revendication 1, caractérisé en ce que
    le dispositif d'alimentation en énergie (130) présente des condensateurs supérieurs (115) qui sont reliés avec la bobine supérieure d'induction (110) à un circuit partiel résonant supérieur, et des condensateurs inférieurs (125) qui sont reliés avec la bobine inférieure d'induction (120) à un circuit partiel résonant inférieur; et
    le dispositif supérieur de déplacement (140) du dispositif d'induction à champ longitudinal est configuré pour le déplacement du circuit partiel résonant supérieur perpendiculairement à la surface supérieure de la bande métallique et/ou le dispositif inférieur de déplacement (150) du dispositif d'induction à champ transversal est adapté pour le déplacement de la bobine inférieure d'induction (120) perpendiculairement à la surface inférieure de la bande métallique (200).
  3. Laminoir (400) selon l'une quelconque des revendications précédentes, caractérisé en ce que
    les bobines supérieure et inférieure d'induction (110, 120) ou leur boîtiers sont en forme de C pour le déplacement transversal du dispositif d'induction à champ longitudinal vers et en dehors de la ligne de la bande métallique (200).
  4. Laminoir (400) selon l'une quelconque des revendications précédentes, caractérisé en ce que
    les bobines supérieur et inférieure d'induction (110, 120) sont chacune formées d'un seul enroulement ou d'une pluralité d'enroulements partiels reliés électriquement en parallèle et avantageusement en croix.
  5. Laminoir selon la revendication 2, caractérisé en ce que
    le dispositif d'alimentation en énergie (130) est formé pour alimenter les bobines d'induction (110, 120) et les circuits partiels résonants - en fonction de l'épaisseur de la bande métallique - avec des fréquences de courant ou de tension entre 2 kHz et 30 kHz.
  6. Laminoir selon la revendication 4 ou 5, caractérisé en ce que
    le nombre d'enroulements partiels par bobine d'induction est compris entre 3 et 15 - en fonction de la fréquence.
  7. Laminoir (400) selon l'une des revendications précédentes, caractérisé en outre par au moins un dispositif d'induction à champ transversal (180) qui peut être actionné dans le laminoir en plus du au moins un dispositif d'induction à champ longitudinal.
  8. Laminoir (400) selon la revendication 7, caractérisé en ce que
    le dispositif d'induction à champ transversal (180) comprend un circuit partiel résonant supérieur disposé au-dessus de la surface supérieure de la bande métallique avec un condensateur (115) et une bobine d'induction transversale (182) et un circuit partiel résonant inférieur en-dessous de la surface inférieure de la bande métallique avec un condensateur (125) et une bobine d'induction inférieure (184); et un dispositif supérieur de déplacement (186) du dispositif d'induction à champ transversal est prévu pour le déplacement du circuit partiel résonant supérieur du dispositif d'induction à champ transversal, et un dispositif inférieur de déplacement (188) du dispositif d'induction à champ transversal est prévu pour le déplacement du circuit partiel résonant inférieur du dispositif d'induction à champ transversal, respectivement perpendiculairement au plan tendu par la bande métallique (200).
  9. Laminoir (400) selon la revendication 8, caractérisé en ce que
    les dispositifs supérieur et inférieur de déplacement du dispositif d'induction à champ transversal (186, 188) et/ou les dispositifs supérieur et inférieur de déplacement du dispositif d'induction à champ longitudinal (140, 150) forment une unité structurelle.
  10. Laminoir (400) selon la revendication 9, caractérisé en ce que
    l'unité structurelle comprend un chariot d'induction (142) pour déplacer le dispositif d'induction à champ longitudinal et/ou le dispositif d'induction à champ transversal transversalement à la direction longitudinale de la bande métallique depuis la ligne ou vers la ligne de la bande métallique (200).
  11. Laminoir (400) selon l'une des revendications précédentes, caractérisé en ce que
    un dispositif de commande (187) est prévu pour entraîner le dispositif supérieur et/ou inférieur de déplacement du dispositif d'induction à champ transversal (186, 188) et/ou le dispositif supérieur et/ou inférieur de déplacement (140, 150) du dispositif d'induction à champ longitudinal, ou le chariot d'induction.
  12. Laminoir (400) selon la revendication 11, caractérisé en ce que
    un dispositif de mesure de température (190) est prévu pour détecter la distribution de la température de la bande métallique sur sa largeur;
    le dispositif de mesure de température est de préférence agencé derrière la dernière cage de laminoir de la ligne de laminage de finition; et
    le dispositif de commande (187) est adapté pour commander le dispositif supérieur et/ou inférieur de déplacement (140150) du dispositif d'induction à champ longitudinal et/ou le dispositif supérieur et/ou inférieur de déplacement (186, 188) du dispositif d'induction à champ transversal, de sorte que le dispositif d'induction à champ longitudinal (100), le dispositif additionnel d'induction à champ longitudinal (170) ou le dispositif d'induction à champ transversal (180) est positionnable en réponse à la distribution de température mesurée de manière à ce que la différence entre la distribution de température mesurée et une distribution de température de consigne prédéterminée sur la largeur de la bande métallique soit minimale.
  13. Laminoir (400) selon la revendication 11 ou 12, caractérisé en ce que
    un dispositif de mesure (195) est prévu pour détecter une irrégularité dans la bande métallique, par exemple une nervure sur la bande métallique, une ondulation ou un arc dans la bande métallique, ou une perturbation quelconque du processus de laminage; et
    le dispositif de commande (187) est configuré pour commander le dispositif supérieur et/ou inférieur de déplacement du dispositif d'induction à champ longitudinal (140, 150) et/ou le dispositif supérieur et/ou inférieur de déplacement du dispositif d'induction à champ transversal (186, 188) et/ou le chariot d'induction (142), de telle manière que la distance (d) des bobines d'induction depuis la surface supérieure/inférieure de la bande métallique dans la région de l'irrégularité est modifiée de manière appropriée et/ou les dispositifs d'induction sont déplacés hors de la ligne de la bande métallique.
  14. Laminoir (400) selon l'une des revendications 11 à 13, caractérisé en ce que
    au moins un capteur de contact (198) est prévu, par exemple sous la forme d'un capteur de mouvement ou un capteur d'accélération, pour détecter un contact du dispositif d'induction à champ longitudinal (170) et/ou à champ transversal (180) par la bande métallique 200; et
    le dispositif de commande (187) est configuré pour commander le dispositif supérieur et/ou inférieur de déplacement du dispositif d'induction à champ longitudinal (140, 150) et/ou le dispositif supérieur et/ou inférieur de déplacement du dispositif d'induction à champ transversal (186, 188) et/ou le chariot d'induction (142), de telle manière que dispositif d'induction à champ longitudinal (100) et/ou le dispositif d'induction à champ transversal (180) en cas de contact avec la bande métallique (200) soit ouvert dans la direction d'épaisseur et/ou soit déplacé latéralement en dehors de la ligne.
  15. Laminoir (400) selon l'une des revendications précédentes, caractérisé en ce que
    un dispositif additionnel d'induction à champ longitudinal (170) et/ou le dispositif d'induction à champ transversal (180) est disposé entre des cages individuelles de laminoir de la ligne de laminage de finition.
  16. Système de coulée et de laminage (500) avec
    une machine de coulée (300) pour générer une bande métallique (200);
    caractérisé par
    un laminoir disposé, suivant la direction de coulée de la matière, après la machine de coulée (400), selon l'une des revendications précédentes 1 à 15 °.
  17. Système de coulée et de laminage (500) selon la revendication 16,
    caractérisé en ce que
    un four (350) est prévu entre la machine de coulée (300) et le laminoir (400); et
    au moins un dispositif supplémentaire d'induction à champ longitudinal (170) et/ou le au moins un dispositif d'induction à champ transversal (180) est disposé entre le four (350) et la cage de dégrossissage (420).
  18. Système de coulée et de laminage (500) selon la revendication 17,
    caractérisé en ce que
    le au moins un dispositif supplémentaire d'induction à champ longitudinal séparé et réglable dans la direction de l'épaisseur est disposé entre le four (350) et la cage de dégrossissage, et le au moins un dispositif d'induction à champ transversal (180) est disposé entre des cages de laminoir de finition individuelles (440-n).
  19. Procédé pour produire une bande métallique avec un laminoir (400) selon l'une quelconque des revendications 1-15 ou d'un système de coulée et de laminage (500) selon l'une quelconque des revendications 16 à 18, avec un dispositif d'induction à champ longitudinal (170) et de manière optionnelle, en outre, un dispositif d'induction à champ transversal (180)
    caractérisé, en ce que
    la distance d des bobines supérieure et/ou inférieure d'induction du dispositif d'induction à champ longitudinal ou du dispositif d'induction à champ transversal pendant le laminage du ruban de la bande métallique (200) est réglée en fonction de l'épaisseur respective de la bande métallique à une distance de fonctionnement approprié d <60mm.
  20. Procédé selon la revendication 19, caractérisé en ce que
    la distance (d) est maintenue constante pendant le laminage du ruban.
  21. Procédé selon la revendication 19 ou 20, caractérisé en ce que
    la distance de fonctionnement des dispositif d'induction à la bande métallique (200) pendant le laminage du ruban de la bande métallique est réglée à une valeur d<20mm.
  22. Procédé selon l'une des revendications 19 à 21, caractérisé en ce que
    les bobines supérieure et inférieure d'induction (110, 120, 182, 184) du dispositif d'induction à champ longitudinal (100) et éventuellement aussi du dispositif d'induction à champ transversal (180) au cours de l'entrée de la tête de la bande métallique dans une cage de laminoir sont déplacées soit à une distance de sécurité prédéfinie ou vers l'extérieur de la ligne de la bande; et
    les bobines supérieure et inférieure d'induction (110,120, 182, 184) du dispositif d'induction à champ longitudinal (100) et éventuellement aussi du dispositif d'induction à champ transversal (180) après l'achèvement de l'entrée de la tête de la bande métallique ou après le passage de la tête de bande - le cas échéant sont déplacées vers la ligne de la bande et sont réglées à la distance de fonctionnement appropriée.
  23. Procédé selon l'une quelconque des revendications 19 à 22, caractérisé en ce que
    les dispositif d'induction (100, 170, 180) ne sont activés que quand ils sont à la distance de fonctionnement par rapport à la bande métallique (200).
  24. Procédé selon l'une quelconque des revendications 19 à 23, caractérisé en ce que
    les bobines supérieures et inférieures d'induction (110, 120.184, 186) du dispositif d'induction à champ longitudinal (100) et/ou du dispositif d'induction à champ transversal (180) sont déplacées à nouveau à la distance de sécurité prédéfinie, ou les dispositifs d'induction sont déplacés hors de la ligne de la bande métallique, par des exemples juste avant que la fin de la bande métallique quitte une cage de laminoir disposée avant le dispositif d'induction longitudinale ou une tension existante de bande est réduite ou dans le cas d'un accident de laminage ou dans le cas d'une autre perturbation de débit massique.
  25. Procédé selon l'une quelconque des revendications 19 à 24, caractérisé en ce que
    le système de coulée et de laminage (500) fonctionne de manière continue et/ou semi-continue.
  26. Procédé selon l'une quelconque des revendications 19 à 25, caractérisé en ce que le dispositif d'induction à champ longitudinal, séparé et réglable dans le sens de l'épaisseur de la bande métallique (100, 170), est utilisé de préférence à partir d'une bande métallique d'épaisseur ≥ 6 mm.
  27. Procédé selon l'une quelconque des revendications 19-26, caractérisé en ce que
    les dispositifs supérieur et inférieur de déplacement du dispositif d'induction à champ transversal (186, 188) et/ou les dispositifs supérieur et inférieur de déplacement du dispositif d'induction à champ longitudinal (140, 150) peuvent être utilisés, avantageusement afin de maximiser l'efficacité du chauffage de la bande métallique en minimisant la distance d du dispositif d'induction par rapport à la bande métallique et pour éviter un contact par la bande métallique en ouvrant le dispositif d'induction.
  28. Dispositif d'induction à champ longitudinal (170) pour une utilisation dans le laminoir selon l'une quelconque des revendications 1-15;
    caractérisé, en ce que
    le dispositif d'induction à champ longitudinal (100, 170), séparé et positionnable dans le sens de l'épaisseur de la bande métallique, est utilisé pour des bandes métalliques avec des variations d'épaisseur dans la région des dispositif d'induction ΔH≥ 6 mm ou préférentiellement ΔH ≥ 15 mm.
EP14195442.0A 2014-11-28 2014-11-28 Installation de laminage Active EP3025799B2 (fr)

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PCT/EP2015/077616 WO2016083439A1 (fr) 2014-11-28 2015-11-25 Laminoir, installation de laminage de coulée continue et procédé de production d'une bande métallique

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EP3911771A1 (fr) * 2019-01-14 2021-11-24 Primetals Technologies Austria GmbH Dispositif de chauffage par induction d'une pièce dans un laminoir
AT522035A1 (de) * 2019-01-14 2020-07-15 Primetals Technologies Austria GmbH Vorrichtung zur induktiven Erwärmung eines Werkstücks in einer Walzanlage
AT522345B1 (de) * 2019-03-29 2020-11-15 Primetals Technologies Austria GmbH Heizungsvorrichtung zum induktiven Erhitzen eines Flachstahlstreifens in einem Warmwalzwerk
DE102019008622A1 (de) * 2019-12-13 2021-06-17 ABP lnduction Systems GmbH Querfeldinduktionsheizeinrichtung
WO2021151133A1 (fr) * 2020-01-27 2021-08-05 Berndorf Band Gmbh Dispositif de chauffage et de séchage d'au moins un produit fabriqué à partir d'un matériau non ferromagnetique
EP4015099A1 (fr) * 2020-12-15 2022-06-22 Primetals Technologies Austria GmbH Fabrication efficace en énergie d'un feuillard à chaud ferritique dans une installation composite de coulée et de laminage

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