EP4183227A1 - Procédé et installation pour chauffer des objets plats par induction - Google Patents

Procédé et installation pour chauffer des objets plats par induction

Info

Publication number
EP4183227A1
EP4183227A1 EP21743152.7A EP21743152A EP4183227A1 EP 4183227 A1 EP4183227 A1 EP 4183227A1 EP 21743152 A EP21743152 A EP 21743152A EP 4183227 A1 EP4183227 A1 EP 4183227A1
Authority
EP
European Patent Office
Prior art keywords
transverse
field inductor
inductor device
flat material
transverse field
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.)
Pending
Application number
EP21743152.7A
Other languages
German (de)
English (en)
Inventor
Heinz Fürst
Simon Grosseiber
Thomas Lengauer
Achim THUS
Adrej UMBRASKO
Michael Zahedi
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.)
Primetals Technologies Austria GmbH
ABP Induction Systems GmbH
Original Assignee
Primetals Technologies Austria GmbH
ABP Induction Systems GmbH
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 Primetals Technologies Austria GmbH, ABP Induction Systems GmbH filed Critical Primetals Technologies Austria GmbH
Publication of EP4183227A1 publication Critical patent/EP4183227A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/101—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces
    • H05B6/103—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor
    • H05B6/104—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor metal pieces being elongated like wires or bands
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/42—Induction heating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • B21B2001/225—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 by hot-rolling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to a method for the inductive heating of flat goods transported in a feed direction, preferably a steel strip, with at least one transverse field inductor device extending transversely to the feed direction across the width of the flat goods, with a longitudinal axis running parallel to a transverse axis of the flat goods. Furthermore, the present invention relates to a system with which such a method can be carried out.
  • flat goods such as strips, sheets and slabs are also heated inductively.
  • a current is induced in the flat material, as a result of which the material is heated.
  • Inductive heating systems for heating flat goods have longitudinal field inductors for longitudinal field heating or transverse field inductors for transverse field heating.
  • the flat material to be heated is completely surrounded by the inductor coil, so that the main magnetic flux is directed in the feed direction of the flat material.
  • the induced currents close across the cross-section of the workpiece, with the resulting temperature distribution being almost uniform over the entire bandwidth of the flat material at a suitable frequency of the inductor current.
  • transverse field heating With transverse field heating, the inductor coils do not enclose the flat material, but are arranged on the top and/or underside of the flat material to be heated. In this way, the main magnetic flux of the inductor coils is directed perpendicularly to the surface of the slab.
  • the disadvantage of transverse field heating systems is that the temperature distribution in the flat material is normally inhomogeneous. For each application, this requires an adapted construction of the geometric dimensions and an optimization of the operating parameters of a cross-field heating system.
  • the inductor device has at least two inductor layers arranged one above the other parallel to the plane of the flat material, which can be displaced independently of one another transversely to the feed direction in order to Way to achieve a flexible adjustment of the temperature distribution in the flat material in the transverse direction of the flat material.
  • US 20180092163 A1 discloses a heating device for an aluminum strip with a plurality of rotating rollers for magnetic heat induction.
  • the rotating rollers are arranged in the width direction of the slab.
  • the present invention is based on the object of providing a method and a system with which a particularly ho mogeneous temperature distribution can be achieved over its transverse profile in the inductive heating of flat goods.
  • each transverse field inductor device comprises at least two non-rotating conductors which run in the transverse axis of the flat material and through which an alternating current flows in series; and that the longitudinal axis of the transverse field inductor device is positioned in a vertical plane at an angle to the transverse axis of the slab.
  • the solution according to the invention is therefore based on the idea of varying the distance between the transverse field inductor device and the upper side or the underside of the flat material, depending on the requirement, by tilting the transverse field inductor device over the transverse profile of the flat material, so that the flat material is lower than its transverse profile is heated to different degrees. It can be assumed that the greater the distance between the flat material and the quadrature field inductor device, the less the heating will be. This is particularly noticeable in the transverse end areas of the flat material, whereby the inclined position of the inductor device results in a large distance in one end area and a small distance in the other end area, so that the end areas are heated to different degrees here. If the other end area is to be heated more, a smaller distance is created in this area than in the other end area by slanting. Both transverse end regions can thus be variably heated by changing the inclination.
  • the transverse field inductor device forms at least one, preferably several "windings" arranged in series, so that the magnetic induction and the inductive heating power are significantly higher than with a single current-carrying conductor .
  • the arrangement of the conductors in the direction of the width of the flat product also ensures that wide flat products, for example with a width of between 900 and 2800 mm, can also be heated evenly by the transverse field inductor device.
  • the oblique position of the transverse field inductor device implemented according to the invention thus varies the distance to the flat product, so that the temperature distribution of the inductor device to the flat product can be optimized during heating by varying the distances from the inductor device to the flat product.
  • the distance is preferably varied by a control or regulating device.
  • the electric current induced in the material depends on the distance from the coil. In the case of the transverse field induction method described here, this dependency can be represented by the following formula
  • P P0 * e kx
  • the procedure is preferably such that a temperature of the flat material is measured in the feed direction before and/or after the transverse field inductor device and, depending on this, the transverse field inductor device is inclined.
  • a temperature profile of the flat goods is measured across the width of the same.
  • the inclined position can then be used to carry out a corresponding equalization or compensation during the heating process.
  • the temperature measuring device sends a corresponding signal to a control or regulating device, which causes a corresponding movement of the inductor device (inclined position of the same).
  • control or regulating device calculates a corresponding temperature and position model that reflects the required thermal energy exposure across the width of the flat material, and the inductor device is set to the calculated and required inclination in order to compensate for the temperature deviation.
  • the procedure can be such that the required application of energy to the transverse field inductor device is determined as a function of the measured temperature of the flat material or the temperature profile, which is then used to calculate the inclination of the transverse field inductor device in the transverse direction of the flat material. In this way, an exact temperature setting can then take place via the transverse profile of the flat product. Therefore, in addition to adjusting the energization of an AC power source, the skew angle of the inductor device is adjusted.
  • an upper and/or a lower transverse field inductor device can be inclined.
  • the inclined position of the transverse field inductor device or transverse field inductor means can be hydraulic, pneumatic or electromechanical.
  • the transverse field inductor device is displaced transversely to the feed direction (i.e. the longitudinal axis of the flat material). This can preferably be done in both directions. In this way, in addition to the inclined position, temperature irregularities can be evened out or temperature deviations can be compensated for, so that a homogeneous temperature profile of the flat material ultimately results at the end of the heating process.
  • the transverse field inductor device is displaced in the feed direction in front of the transverse field inductor device, depending on the temperature measurement of the flat material, transversely to the feed direction or the longitudinal axis of the flat material.
  • an inclination and transverse positioning of the transverse field inductor device is carried out by the control/regulating device, in particular as a function of the temperature measurement of the flat material.
  • the transverse field inductor device is displaced in the transverse direction relative to the flat material and is inclined relative to the transverse axis of the flat material in order to achieve the desired temperature setting.
  • a large number of temperature measurements, particularly in intermediate positions, can be carried out on the flat product in order to be able to react flexibly to temperature deviations.
  • adjustments to the respective circumstances can be made in order to achieve a particularly high level of accuracy with regard to the temperature setting.
  • This embodiment is based on the knowledge that a temperature distribution of the flat material that is ununiform in the width direction during and after the rolling has an unfavorable effect on the flatness and/or the profile of the hot-rolled slab. Provision is therefore made to vary the inclination and/or the transverse positioning of one or more transverse field inductor devices based on the flatness and/or the profile of the hot-rolled flat material. This improves the geometric properties of the hot-rolled slab.
  • the present invention also relates to a system for inductively heating flat goods that can be transported in a feed direction, having at least one transverse field inductor device extending transversely to the feed direction across the width of the flat goods, with a longitudinal axis running parallel to a transverse axis of the flat goods.
  • the system has at least one, preferably two, particularly preferably four, positioning device for the transverse field inductor device, so that the longitudinal axis of the transverse field inductor device can be positioned in a vertical plane at an angle to the transverse axis of the flat material.
  • the transverse field inductor device is preferably mounted in a frame or rack of the system in such a way that it can be raised or lowered at one or the other transverse end in order to achieve the desired inclined position.
  • the positioning device preferably has a positioning device in each transverse end region of the transverse field inductor device for raising or lowering the respective transverse end of the transverse field inductor device.
  • the system also includes a temperature measuring device for the flat material before and/or after the transverse field inductor device. Furthermore, a control or regulating device is provided, which is used to control the positioning device for raising or lowering the inductor device as a function of the temperature measuring device.
  • the temperature measuring device measures in particular a temperature profile in the transverse direction of the flat product.
  • the system designed according to the invention preferably works in such a way that the control or regulating device provided determines the power applied to the quadrature field inductor device as a function of the measured temperature and correspondingly controls an AC power source for power supply. Furthermore, in The positioning device for tilting the inductor device is controlled as a function of this, so that an optimal temperature distribution can be achieved by varying the power supply and the distance across the transverse profile of the flat material.
  • the system includes upper and lower quadrature field inductor means, either or both of which can be driven.
  • positioning devices are provided for tilting the inductor device, each of which is designed as a hydraulic, pneumatic and/or electromechanical actuator.
  • the system according to the invention has a device for transverse displacement of the inductor device.
  • the inductor device is moved in the transverse direction relative to the flat product, so that in addition to the inclined position of the inductor device, there is a further possible variation for heating the transverse profile of the flat product.
  • the frame of the installation that carries the inductor device is displaced transversely as a whole relative to the flat material. This superimposes the effects of the inclination and the transverse position in order to achieve the desired temperature distribution.
  • one or more drive devices are present for transverse displacement of the transverse field inductor devices relative to one another.
  • the temperature measuring device provided according to the invention can have a large number of sensors in order to be able to carry out a particularly precise temperature measurement in this way, so that the accuracy of the heating of the flat material can be increased via its transverse profile.
  • At least one hot rolling stand for hot rolling of the flat material and a measuring device for measuring the flatness and/or profile of the hot-rolled flat material are arranged downstream of the system for inductive heating in the feed direction, with the control or regulating device depending on the flatness and/or the Profile can perform a tilt and / or and a transverse positioning of a transverse field inductor device.
  • an improvement in the accuracy and homogeneity of the temperature cross-section of the flat material is thus achieved. Furthermore, homogeneous surfaces of the flat goods and homogeneous material properties across the width of the same.
  • the end product has a high flat product profile accuracy. Furthermore, an improvement in the homogeneity of the wear of the work rolls and thus a longer service life of the plant is achieved.
  • FIG. 1 shows a diagram which shows the induced current density as a function of the distance between the transverse field inductor device and flat material
  • FIG. 2 shows a schematic cross section through a first embodiment of a plant for the inductive heating of flat goods
  • FIG. 3 shows a schematic cross section through a second embodiment of a plant for the inductive heating of flat goods
  • FIG. 4 shows a schematic cross section through a third embodiment of a plant for the inductive heating of flat goods
  • FIG. 5 shows a plan view of a plant for inductively heating flat goods in a hot rolling mill
  • FIG. 6 shows a schematic of a system for inductively heating flat goods in a hot rolling mill.
  • FIG. 1 shows a diagram which shows the induced current density as a function of the distance between the coil of a transverse field inductor device and the flat material.
  • the normalized current density is given on the ordinate, while the normalized distance is shown on the abscissa. It can be clearly seen that the current density decreases with increasing distance.
  • the system shown schematically in FIG. 2 for inductively heating flat goods that can be transported in a feed direction has an upper transverse field inductor device 2 and a lower transverse field inductor device 3, which are only shown schematically here as bars.
  • the two devices 2, 3 have induction coils which are fed with alternating current via electric cables 9, 10 in order to generate corresponding eddy currents which cause heating of the flat material 1 arranged between the two transverse field inductor devices 2, 3.
  • Flat material 1 is a steel strip to be heated, which runs through the system in a direction perpendicular to the drawing plane.
  • the two transverse field inductor devices 2, 3 are designed to be wider than the flat material 1 and are each mounted in a height-adjustable manner on a frame 5 of the system via two positioning devices 4 designed as hydraulic cylinders or electric linear drives.
  • the system can be moved in the transverse direction, i.e. perpendicular to the longitudinal axis of the flat product 1, by means of rollers 6 on a base 8 provided with rails.
  • a corresponding drive device is shown at 7 .
  • the system is provided with a positioning device for the two quadrature field inductor devices 2, 3, which includes the positioning devices 4 shown.
  • Each inductor device 2, 3 is therefore provided with two positioning devices 4 which cause the inductor devices 2, 3 to be raised or lowered in their transverse end regions.
  • the lower inductor device 3 extends parallel to the flat material 1 and at a distance from it, while the upper inductor device 2 is arranged at an angle thereto.
  • the inclined position of the inductor device 2 is achieved by actuating the positioning device 4 shown on the left in FIG.
  • This inclination or raising of the inductor device 2 has the purpose of increasing the distance from the inductor device 2 to the flat material 1 and thereby varying the heating of the same in this area compared to the heating in the other transverse end area. Due to the greater distance, the flat material is therefore heated less in this end area than in the opposite end area, so that in this way, for example, an equalization of the temperature profile in the transverse direction of the flat material 1 can be achieved.
  • the system works in such a way that a measuring device (not shown here) is arranged in front of the system, which measures a temperature profile in the transverse direction of the flat material 1 measures.
  • the corresponding signal from the measuring device is fed to a control device (not shown), which uses this to determine a temperature and position model and, on the one hand, controls the alternating current source for the two inductor devices 2, 3 and, on the other hand, the two positioning devices 4 of the upper inductor device 2.
  • the two inductor devices 2, 3 and the positioning devices 4 are therefore controlled in such a way that there is a homogeneous temperature distribution over the transverse profile of the flat material 1.
  • FIG. 3 shows an embodiment of a system in which, in addition to the inclined position of the inductor devices 2, 3, a displacement of the system in the transverse direction relative to the flat material 1 is possible.
  • the two positions of the inductor devices 2, 3 that have been shifted to the right are shown in dotted lines in the figure.
  • the housing of the appendix is shifted to the right in the figure via rollers 6 arranged on the underside of the associated frame 5, the shifted position being shown in dashed lines.
  • the flat material 1 is therefore no longer in the center in relation to the two inductor devices 2, 3, but is displaced to the left relative to them.
  • the system is provided with a device for tilting the two inductor devices 2, 3.
  • both the upper and the lower inductor device 2, 3 have been moved somewhat upwards and downwards via the positioning devices 4 shown on the left in the figure, resulting in a corresponding inclined position.
  • the distance to the respective inductor device 2, 3 is therefore greater in the left-hand transverse end area of flat material 1 than in the right-hand transverse end area of the same.
  • a measuring device (not shown) is provided before passing through the plant, which measures a transverse temperature profile of flat material 1 and sends a corresponding signal to an associated control device (also not shown).
  • This control device controls both the alternating current source for the energy giebeetzschlagung of the two inductor devices 2, 3 and the positioning device for the inclined position of the inductor devices 2, 3 and the device for transverse displacement of the same.
  • the position and temperature model generated by the control device is therefore realized by actuating the three devices mentioned above, so that an essentially homogeneous temperature cross-section results for the slab 1 at the outlet of the system.
  • FIG. 1 A system for inductively heating flat goods 1 is shown in FIG.
  • the upper and lower quadrature field inductor devices 2, 3 are independent dependent on one another in the width direction of the flat material via drive devices 7.
  • the temperature profile can be set independently of the top and bottom of the flat product 1.
  • This can be advantageous in order to be able to quickly remove the induction modules from flat material 1 in the event of a cobble.
  • the upper and lower transverse field inductor devices 2, 3 can both be tilted separately with respect to the transverse axis of the flat material 1 and shifted separately in the width direction. It is of course possible, please include only the transverse displacement of a transverse field inductor devices. In this case, too, a relative displacement of the quadrature field inductor devices can be achieved.
  • FIG. 5 schematically shows a top view of a system for inductive heating with a single induction module with an upper and lower transverse field inductor device 2, 3, only the upper transverse field inductor device 2 being visible.
  • Each inductor device 2, 3 has eight conductors 30, which are aligned in the transverse direction Q of the flat material 1, and forms, for example, four turns. It is of course possible to provide more than four turns, for example 20 turns.
  • the inductor devices 2, 3 can be set at an angle to the transverse axis of the flat material by two positioning devices 4 each.
  • the inclination is effected by a control or regulating device 23, which adjusts the inclination as a function of a temperature profile of the flat material 1 (see the temperature measuring device 22 before or after the induction module), a target value for the profile and/or flatness 41 and the actual value for the profile - and/or flatness of the hot-rolled slab (see the measuring device 40) is calculated.
  • the control or regulating device 23 is connected to the positioning devices 4 for the inclined position, the drive device 7 for transversely displacing the frame 5 and the AC power source 24 .
  • the amperage and optionally also the frequency of the alternating current flowing through the conductors 30 can be set via the alternating current source 24 .
  • FIG. 6 schematically shows a front view of a system for inductive heating with five induction modules 2, 3, a temperature measuring device 22 for measuring a temperature profile, a descaling device 21, three hot rolling stands 20 and a measuring device 40 for profile and/or flatness .
  • a control or regulating device 23 sets the inclined position and possibly also a transverse displacement of the transverse field inductor devices 2, 3 as a function of the measured profile and/or flat unit and the temperature profile.
  • the hot rolling stands 20 can have an intermediate be seen or finishing train in a combined casting and rolling plant in which a hot-rolled finished strip is produced from molten steel, preferably in continuous operation.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Abstract

L'invention concerne un procédé et une installation pour chauffer des objets plats par induction transportés dans une direction d'alimentation. L'installation comporte au moins un dispositif inducteur de champ transversal qui s'étend transversalement à la direction d'alimentation sur la largeur de l'objet plat et présente un axe longitudinal s'étendant parallèlement à l'axe transversal de l'objet plat. Le dispositif inducteur de champ transversal est positionné de telle sorte que l'axe longitudinal s'étend dans un plan vertical de manière oblique par rapport à l'axe transversal de l'objet plat. Il est ainsi possible de faire varier la distance entre l'objet plat et le dispositif inducteur et, ainsi, la répartition de température sur le profil transversal de l'objet plat, de sorte que l'objet plat soit chauffé de manière homogène.
EP21743152.7A 2020-07-15 2021-07-08 Procédé et installation pour chauffer des objets plats par induction Pending EP4183227A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20000253.3A EP3941157B1 (fr) 2020-07-15 2020-07-15 Procédé et installation de chauffage inductif des matières plates
PCT/EP2021/069035 WO2022013066A1 (fr) 2020-07-15 2021-07-08 Procédé et installation pour chauffer des objets plats par induction

Publications (1)

Publication Number Publication Date
EP4183227A1 true EP4183227A1 (fr) 2023-05-24

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP20000253.3A Active EP3941157B1 (fr) 2020-07-15 2020-07-15 Procédé et installation de chauffage inductif des matières plates
EP21743152.7A Pending EP4183227A1 (fr) 2020-07-15 2021-07-08 Procédé et installation pour chauffer des objets plats par induction

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20000253.3A Active EP3941157B1 (fr) 2020-07-15 2020-07-15 Procédé et installation de chauffage inductif des matières plates

Country Status (6)

Country Link
US (1) US12569896B2 (fr)
EP (2) EP3941157B1 (fr)
CN (1) CN115803465B (fr)
ES (1) ES3050614T3 (fr)
PL (1) PL3941157T3 (fr)
WO (1) WO2022013066A1 (fr)

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EP3941157A1 (fr) 2022-01-19
US20230241657A1 (en) 2023-08-03
CN115803465B (zh) 2025-12-16
PL3941157T3 (pl) 2025-12-22
EP3941157B1 (fr) 2025-09-10
EP3941157C0 (fr) 2025-09-10
ES3050614T3 (en) 2025-12-22
CN115803465A (zh) 2023-03-14
WO2022013066A1 (fr) 2022-01-20
US12569896B2 (en) 2026-03-10

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