• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a heating device (1) and a method for inductive heating of a flat steel strip (2) in a hot rolling mill, the heating device (1) being arranged between two rolling trains of the hot rolling mill and the flat steel strip (2) carrying the heating device (1) in one transport direction (R) passes through at a speed, the heating device (1) comprising: a plurality of transverse field modules (3) arranged one after the other along a transport direction (R) of the flat steel strip (2).
    公开号:AT522345A1
    申请号:T50273/2019
    申请日:2019-03-29
    公开日:2020-10-15
    发明作者:LENGAUER Thomas；Bernd Linzer Dr；Zahedi Michael
    申请人:Primetals Technologies Austria GmbH；
    IPC主号:
    专利说明:

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    201800438 description
    Heating device for inductive heating of a flat steel
    strip in a hot rolling mill
    The invention relates to a heating device and a method for inductively heating a flat steel strip in a hot rolling mill by means of the heating device, the heating device being arranged between two rolling trains of the hot rolling mill and the flat steel strip running through the heating device in one transport direction at one speed.
    When heating a flat steel strip (short steel strip or just strip) in a hot rolling mill by means of an inductive heating device, the heating device being arranged between two rolling lines of the hot rolling mill and the flat steel strip passing through the heating device in one transport direction at one speed, attention must be paid to the operating point of the heating device . In the case of inductive heating devices according to the prior art, this means that the heating device is either adapted for heating thin steel strips, for example with a thickness between 6 mm and 15 mm, or the heating device is adapted for heating thick steel strips, for example with a thickness larger than 15 mm. By adapting the respective operating points to the prevailing operating conditions, the heating device can meet the requirements for efficiency and the required temperature profile in the respective thickness range, i.e. adhere to the temperature distribution over the width and thickness of the steel strip. This has the consequence that in the first case thick steel strips, e.g. with a thickness> 18 mm, are not adequately heated and in the second case thin steel strips, e.g. with a thickness <12 mm, cannot be adequately heated. By "not appropriate" is meant that the efficiency and / or the temperature profile of the heating
    direction is bad or not acceptable.
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    The cause of this problem is that different thickness ranges of steel strips require different heating concepts, for example that the heating device generates a magnetic field across or along the transport direction of the steel strip with a frequency that is suitable for a specific
    th thickness range is matched.
    Since the heating concept and the working frequency of an inductive
    Heating devices are largely determined by their structure, there is flexibility to cover a wide range of thicknesses with prior art heating devices
    either not possible or only possible to a very limited extent.
    In addition, the nominal working frequency of an induction heater is largely fixed and can only correspond to a small range in the case of heaters according to the prior art
    be adjusted.
    In order to cover a large range of end products with a hot rolling mill such as a casting-rolling compound system, in particular an Arvedi ESP system, a CSP system or an 0OSP / DUE system, it is desirable to have steel strips over a large thickness range in an energy-efficient and homogeneous
    to be able to heat up visible from the temperature profile.
    The invention is based on the object of providing an improved heating device and an improved method for inductive heating of a flat steel strip that moves in a transport direction between two rolling trains of a hot rolling mill at a speed, in a hot rolling mill
    plant, in particular a casting and rolling compound system.
    The object is achieved according to the invention by a heating device having the features of claim 1. Advantageous embodiments of the invention are the subject of the
    pending claims.
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    A heating device according to the invention for inductively heating a flat steel strip, wherein the heating device is arranged between two rolling trains of the hot rolling mill and the flat steel strip runs through the heating device in a transport direction at one speed, comprises:
    - a plurality, in particular 6 to 12, particularly preferably 8 to 10, of along a transport direction of the flat steel
    Stripe successively arranged cross-field modules.
    A transverse field module comprises at least one inductor, preferably an inductor above the steel strip and an inductor below the steel strip, the inductor or inductors generating a magnetic field transversely to the transport direction R, specifically in the thickness direction and thus perpendicular to the top and bottom of the flat steel strip 2, and heat it inductively in this way. A cross-field module is
    particularly suitable for heating a thin steel strip.
    In one embodiment, the heating device further comprises:
    - A plurality, in particular 2 to 8, of longitudinal field modules arranged one after the other along the transport direction of the flat steel strip, which advance along the transport direction
    and / or are arranged after the transverse field modules.
    A longitudinal field module comprises one or more inductors that generate a magnetic field in the longitudinal direction, specifically in the transport direction and thus parallel to the top and bottom of the flat steel strip, and inductively heat it in this way. A longitudinal field module is particularly useful for heating
    Suitable for a thicker steel band.
    In one embodiment, the heating device comprises a power supply for supplying at least one transverse field module with an alternating voltage, the frequency of the alternating voltage depending on the thickness of the flat steel strip
    controlled or regulated. The thickness of the
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    The flat steel strip can either be measured or taken from a pass schedule of the upstream rolling mill. The frequency can be used to specifically influence the heating of the steel strip, with higher frequencies only heating areas close to the surface and lower frequencies requiring a relatively uniform heating of all thickness areas.
    Act.
    Cross-field modules are operated according to the invention with an alternating voltage with a frequency between 200 and 1500 Hz. Longitudinal field modules are also operated with an alternating voltage, but between 3000 and 8000 Hz, especially at
    thin bands even up to 40 kHz.
    In one embodiment, the frequency of the alternating voltage can be switched during operation of the heating device or during a heating process. Alternatively, the frequency can be set during a system shutdown, i. before or after
    a heating process.
    In a preferred embodiment, the frequency can be changed variably during a heating process or during a heating process. Since the power supply of the cross-field modules and the inductors are an electrical oscillating circuit, e.g. form a so-called LC resonant circuit, the frequency can e.g. can be changed by changing the capacity of the power supply. However, other possibilities for changing the frequency are also known to the person skilled in the art. The variable change
    the frequency is typically stepped.
    Switching or variably changing the frequency can e.g. by a system control of the hot rolling mill as a function of at least one influencing variable from the group of the thickness of the flat strip, the speed of the flat strip, the temperature before the entry of the flat strip into the heating device, and the temperature after the exit of the flat strip from the heating device.
    can be specified.
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    It is advantageous if the heating device comprises a power supply for supplying at least one transverse field module or a longitudinal field module with an alternating voltage, wherein the current intensity can be set in a controlled or regulated manner as a function of the thickness and / or the speed of the flat steel strip. The
    Energy supply can be adjusted.
    It is advantageous if the heating device has an actuator for moving at least one inductor of a transverse field module in the width direction transversely to the transport direction. It is particularly preferred if a first actuator can move at least one inductor on the upper side of the steel strip and a second actuator can move at least one inductor on the lower side of the steel strip. As a result, the cross-field module can heat different widths of steel strips evenly and prevent excessive heating of the edge
    areas are kept back.
    The technical problem is also achieved by a method according to claim 8. Advantageous embodiments of the
    invention are the subject of the dependent claims.
    According to claim 8, a flat steel strip is inductively heated by means of the heating device according to the invention, the heating device being arranged between two rolling trains of the hot rolling mill and the flat steel strip running through the heating device in a transport direction at one speed. The flat steel strip is thereby moved by a plurality of
    arranged cross-field modules heated.
    In one embodiment, the flat steel strip is also by means of a plurality of longitudinal field modules arranged one after the other along the transport direction of the flat steel strip, which along the transport direction before and / or after
    the transverse field modules are arranged, heated.
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    In one embodiment, the transverse field modules with AC voltage of at least one frequency, preferably at least
    two frequencies, operated.
    In one embodiment, the frequency is switched over or variably changed during operation of the heating device or during a heating process. Alternatively, the frequency can also be switched before or after a heating process.
    tet or can be changed variably.
    According to one embodiment with a power supply for supplying at least one transverse field module or at least one longitudinal field module with an alternating voltage, the current intensity is set in a controlled or regulated manner as a function of the thickness and / or the speed of the flat steel strip.
    According to a further embodiment with an actuator for moving at least one inductor of a transverse field module in the width direction transverse to the transport direction, the position of the inductor is controlled or regulated depending on the width and / or a temperature profile of the flat steel strip. The temperature profile of the flat steel strip can e.g. can be measured by temperature measurement at a plurality of positions in the width direction of the strip before the strip enters the rolling train downstream of the heating device. In particular, the temperature profile can e.g. measured before descaling or, preferably, after descaling, with the strip measured before (
    tig) rolling is typically descaled.
    The described embodiments combine different inductive heating concepts, for example transverse field modules and longitudinal field modules with different, in particular switchable or variably adjustable, working frequencies, so that a wide range of thicknesses of the flat steel strips to be heated
    can be covered. The power distribution along the
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    The heating device and the working frequencies of the individual transverse field modules and longitudinal field modules can be selected by setting the current intensity according to the actual thickness of the flat steel strip. This means, for example, that for certain thicknesses, longitudinal field modules are used exclusively or predominantly for heating, and that transverse field modules only support certain frequencies. For other thicknesses of the flat steel strips, the
    be turning back.
    Different frequencies or sets of frequencies can be selected. The switching or variable changing of the frequencies can be done either online or offline in order to optimize the heating efficiency and the temperature profile. The power distribution along the heating device can also be chosen in order to optimize the heating efficiency and the temperature profile. Different power distributions and different working frequencies along the heating device can be selected in order to give the material properties of an end product obtained from the flat steel strip
    influence.
    By combining different heating concepts with switchable or variably changeable working frequencies, the product range of a rolling mill can be expanded considerably. By using different switching patterns (more or less power on transverse field modules and longitudinal field modules) at a certain operating frequency, the heating efficiency can be significantly improved and the temperature distribution over the thickness of the flat steel strip can be influenced.
    Q
    Energy savings of up to 50% are possible.
    The width of the flat steel strip can be, for example, from 900 mm to 1650 mm. The thickness of the flat steel strip can be, for example, from 6 mm to 65 mm, in particular from 8 mm to 45 mm. The mass flow through the heating device can be, for example, from 200 t / h to 450 t / h
    carry. The heating device described can be changed
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    The thickness of the flat steel strip and the mass flow can be adjusted. Optimized heating of the beginning and the end of the flat steel strip results in high productivity in endless operation, but also in batch or semi-endless operation. By means of the device or the method described, a homogeneous heating of the flat steel strip in the direction of the width and the thickness can be achieved. A particularly short length of the heating device with high power density and reduced heat losses can be achieved, even with a low mass flow. Due to the reduced number of inductive modules and the low mechanical com-
    complexity, costs can be reduced.
    The arrangement of transverse field modules and longitudinal field modules each in groups instead of alternating allows easier regulation of the entire heating device. Each type of inductive module or module group, for example transverse field modules, longitudinal field modules or modules with different frequencies, has a typical heating behavior, so that different temperature profiles are generated in each case. For control purposes, it is easier if a first module group generates a certain temperature profile, for example by means of longitudinal field modules that raise the temperature evenly along the width of the flat steel strip, and then with the help of a second module group, for example by means of the transverse field modules, the temperature profile generated accordingly
    is changed and optimized according to requirements.
    Alternatively, other orders can be used. For example, the temperature profile can first be preset using transverse field modules and then temperature homogenization using a longitudinal field module group
    be achieved. Cross-field inductors can usually be used with smaller fre-
    sequences, as the specific
    formation of the magnetic fields the heat better in the material
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    rial can be brought in. The usual working ranges are around 200 Hz to 1500 Hz.
    If only cross-field modules are used, the efficiency increases sharply as the strips become thinner (approx. 60% for 18 mm to approx. 80% for 8 mm). With the thinnest strips, there is an almost homogeneous temperature distribution along the strip, with little overheating at the edges. With increasing strip thickness, this edge overheating also increases and takes on values from approx. 14 mm to 15 mm. Edge overheating is high from approx. 20 mm to 25 mm, which can have a negative effect on product quality. The heating of the strip extends to the core, since low operating frequencies can be used. Due to the low operating frequencies
    a simpler construction of the power supply is possible.
    With longitudinal field inductors, the heat input and the efficiency decrease drastically as the strips become thinner. This can be remedied by increasing the frequency. If, for example, a frequency range of 3000 Hz to 8000 Hz is sufficient for thicknesses greater than 15 mm, frequencies of 10 kHz to 15 kHz are advantageous for thin strip thicknesses of up to approx. 10 mm in order to
    enable efficient operation.
    If the strip thickness decreases further, the frequencies can also
    Reach values up to 40 kHz.
    If only longitudinal field modules are used, the efficiency decreases as the strips become thinner (approx. 70% for 18 mm to approx. 40% for 8 mm). A larger furnace and higher investment costs would therefore be required for the same production volume. An almost homogeneous temperature distribution is always given for all strip thicknesses. As a result, the temperature inlet profile of the heater is "only" raised evenly. This means that cold edges in the inlet remain colder even after they have been heated.
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    If a larger thickness range is to be covered, a combination of induction modules can be used, each of which is adapted to a fixed working frequency
    are designed.
    Alternatively, induction modules can also be used in this case, which depending on the current production parameters are set to the required optimum working frequency.
    switched or can be varied.
    The present invention makes it possible to use a combination of grouped longitudinal field modules and transverse field modules for all types of continuous strip production systems (ESP)
    an optimal heater with high efficiency and optimized
    to configure the temperature distribution.
    The following types of heating devices for ESP production systems should be named here as examples:
    - Intermediate strip thickness between 6 mm and 17 mm: approx. 80 to 90% of the intermediate strip produced has a thickness between 6 and 12 mm, the rest of the production has a thickness between 12 mm and 17 mm. The heating device can include 8 to 10 transverse field modules, for example. Optionally, two longitudinal field modules can also be used
    Improvement of the temperature profile can be used.
    - Intermediate strip thickness between 6 mm and 20 mm: the entire thickness range is used in production. The heating device can for example comprise 8 to 10 transverse field modules and two to four longitudinal field modules. This results in a good efficiency of the transverse field modules with thin strips and a homogeneous temperature profile as a result of uniform heating by the longitudinal field modules.
    - intermediate strip thickness of 6 mm or 8 mm to 45 mm or 50
    mm: The heating device can, for example, convert 8 to 10 transverse field modules and 6 to 8 longitudinal field modules
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    grasp. With a thick intermediate belt, most of the energy is introduced through the longitudinal field modules. This is advantageous for thick tapes. The cross-field modules are mainly used to heat the corner areas and the core of the intermediate strip and thereby to homogenize the temperature profile in the width and thickness direction of the intermediate strip. With a thin intermediate band, most of the energy is brought in by the transverse field modules. This is advantageous for thin ribbons. The longitudinal field modules are either switched off
    or bring only little energy into the intermediate belt.
    An intermediate strip is a flat steel strip or strip that has been rolled in a first rolling train (roughing mill) of the hot rolling mill, but not yet in a second rolling train (finishing mill or
    engl. called finishing mill).
    The properties, features and advantages of this invention described above and the manner in which they are achieved will become clearer and more clearly understood in connection with the following description of exemplary embodiments, which will be explained in more detail in connection with the drawings.
    be tert. Show:
    1 shows a schematic plan view of a first embodiment of a heating device for heating a
    a flat steel strip,
    2 shows a schematic plan view of a second embodiment of a heating device for heating a
    nes flat steel strip, FIG 3 is a schematic plan view of a third embodiment
    form of a heating device for heating a
    a flat steel strip,
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    4 shows a schematic plan view of a fourth embodiment of a heating device for heating a
    a flat steel strip,
    5a shows a schematic representation of a transverse field module
    for heating a flat steel strip,
    FIG. 5b shows a schematic illustration of the current flow and the magnetic field of a transverse field module for heating a
    Flat steel strip,
    6a shows a schematic representation of a longitudinal field module
    for heating a flat steel strip, and
    6b shows a schematic representation of the current supply and the magnetic field of a longitudinal field module for heating a flat steel strip.
    Corresponding parts are marked with the in all figures
    the same reference numerals.
    Figure 1 shows a schematic view of a first embodiment of a heating device 1 for inductive heating of a flat steel strip 2. The flat strip emerges from a roughing train, not shown, is heated by means of the heating device 1 and, after heating, enters a finishing train, not shown. Optionally, the heated flat steel strip 2 can also be descaled before entering the finishing train. The heating device 1 comprises eight transverse field modules 3. A transverse field module 3 comprises one inductor each above and below the flat steel strip 2, which generate a magnetic field transversely to the transport direction R, specifically in the thickness direction and thus perpendicular to the top and bottom of the flat steel strip 2, and heat it inductively in this way. In the embodiment shown, eight transverse field modules 3 arranged one after the other are provided. However, it can also be a larger one
    or a smaller number of transverse field modules 3 can be provided.
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    The cross-field modules 3 are operated with alternating voltage of a first frequency £ fl. The heating device 1 is suitable, for example, for heating flat steel strips with a thickness of 6 mm to 17 mm. The flat steel strip 2 can assume different widths bl, b2. In order to prevent overheating of the edge areas of the flat steel strip 2, the inductors of the transverse field modules 3 can be arranged relative to an edge, e.g. the upper inductor arranged above the strip relative to the edge shown above and the lower inductor arranged below the strip relative to the bottom
    can be moved by one actuator each.
    FIG. 2 shows a schematic view of a second embodiment of a heating device 1 for inductive heating of a flat steel strip 2, in particular for heating between two rolling trains of a hot rolling mill. The heating device 1 comprises ten transverse field modules 3. A transverse field module 3 in turn comprises one inductor each above and below the flat steel strip 2, which generate a magnetic field transversely to the transport direction R, specifically in the thickness direction and thus perpendicular to the top and bottom of the flat steel strip 2 , and inductively heat it in this way. In the embodiment shown, ten transverse field modules 3 arranged one after the other are provided. However, a larger or smaller number of transverse field modules 3 can also be provided. The transverse field modules 3 are operated with alternating voltage at a switchable frequency, the frequency being able to assume the value £ fl or the value £ f2, where f2 is greater than £ l1l. The heating device 1 is suitable, for example, for heating flat steel strips with a thickness of 6 mm to 15 mm, but with an additional setting facility.
    possibility for the temperature profile.
    FIG. 3 shows a schematic view of a third embodiment of a heating device 1 for inductive heating of a flat steel strip 2, in particular for heating between two rolling trains of a hot rolling mill. The heating
    direction 1 comprises a number of consecutively arranged
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    Transverse field modules 3 and longitudinal field modules 4, A transverse field module 3 comprises one or more inductors that generate a magnetic field transversely to the transport direction R, specifically in the thickness direction and thus perpendicular to the top and bottom of the flat steel strip 2, and this inductively in this way heat. In the embodiment shown, eight transverse field modules 3 arranged one after the other are provided. However, a larger or smaller number of transverse field modules 3 can also be provided. A longitudinal field module 4 comprises one or more inductors that generate a magnetic field in the longitudinal direction, specifically in the transport direction R and thus parallel to the top and bottom of the flat steel strip 2, and inductively heat it in this way. In the embodiment shown, four longitudinal field modules 4 arranged one after the other are provided. However, a larger or smaller number of longitudinal field modules 4 can also be provided. The transverse field modules 3 are operated with alternating voltage of a first frequency fl. The heating device 1 is suitable, for example, for heating flat steel strips with a
    Thickness from 6mm to 20mm.
    FIG. 4 shows a schematic view of a fourth embodiment of a heating device 1 for inductive heating of a flat steel strip 2, in particular for heating between two rolling trains of a hot rolling mill. The heating device 1 comprises a number of sequentially arranged transverse field modules 3 and longitudinal field modules 4. A transverse field module 3 comprises one or more inductors that generate a magnetic field transversely to the transport direction R, specifically in the thickness direction and thus perpendicular to the top and bottom of the flat steel strip 2, and inductively heat it in this way. In the embodiment shown, eight transverse field modules 3 arranged one after the other are provided. However, a larger or smaller number of transverse field modules 3 can also be provided. A longitudinal field module 4 comprises one or more inductors that generate a magnetic field in the longitudinal direction, specifically in the transport direction R and thus parallel to the upper
    and underside of the flat steel strip 2, generate and this
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    inductively heat in this way. In the embodiment shown, eight longitudinal field modules 4 arranged one after the other are provided. However, a larger or smaller number of longitudinal field modules 4 can also be provided. The transverse field modules 3 are operated with alternating voltage at a switchable frequency, the frequency being able to assume the value fl or the value £ f2, where f2 is greater than fl. The longitudinal field modules 4 are operated at a frequency f3, where f3> f2. The heating device 1 is suitable for example for heating flat steel strips with a thickness of
    6 mm to 65 mm.
    FIG. 5 a schematically shows a transverse field module 3 with two coils 5, which are arranged above and below the flat steel strip 2. By energizing the coils 5 of the transverse field module 3, a magnetic field M is formed transversely to the transport direction R in the thickness direction of the strip 2. As a result, the flat steel strip 2 with the thickness s and the width bl is heated. On the top and bottom of the
    Eddy currents W form on the strip 2.
    In FIG. 5b, the current I (currents running into the plane of the drawing are represented by a cross, currents running out of the plane of the drawing are shown by a point) of the coils 5 and the magnetic flux lines of the magnetic field M.
    for a further transverse field module 3 shown.
    FIG. 6a shows schematically a longitudinal field module 4 with a coil 5 which surrounds the flat steel strip 2 transversely to the transport direction R. By energizing the coil 5 of the longitudinal field module 4, a magnetic field M is formed in the transport direction R parallel to the top and bottom of the strip 2. As a result, the flat steel strip 2 with the thickness s and the width bl is heated. Parallel to the upper and lower
    side of the strip 2, eddy currents W are formed.
    In Figure 6b, the current I (in the plane of the drawing
    incoming streams are marked by a cross, out of the plane of the drawing
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    outgoing currents are represented by a point) of the coil 5 and the magnetic flux lines of the magnetic field M.
    for a longitudinal field module 4 shown.
    Although the invention is detailed by preferred embodiments
    Examples has been illustrated and described in more detail, the invention is not restricted by the disclosed examples and other variations can be derived therefrom by the person skilled in the art
    without departing from the scope of the invention.
    List of reference symbols
    1 heating device
    2 flat steel strips
    3 cross-field module
    4 longitudinal field module
    5 coil
    bl, b2 width of the flat steel strip fl, £ 2, £ f3 frequency
    M Magnetic flux
    I current
    R transport direction
    Ss thickness of the flat steel strip W eddy current
    权利要求:
    Claims (14)
    [1]
    1. Heating device (1) for inductive heating of a flat steel strip (2) in a hot rolling mill, the heating device (1) being arranged between two rolling lines of the hot rolling mill and the flat steel strip (2) the heating device (1) in a transport direction (R) with a Speed, wherein the heating device (1) comprises:
    - A plurality of transverse field modules (3) arranged one after the other along a transport direction (R) of the flat steel strip (2).
    [2]
    2. Heating device (1) according to claim 1, further comprising:
    - A plurality of longitudinal field modules (4) arranged one after the other along the transport direction (R) of the flat steel strip (2), which along the transport direction (R) before or
    after the transverse field modules (3) are arranged.
    [3]
    3. Heating device (1) according to one of claims 1 or 2 with a power supply for supplying at least one transverse field module (3) with an alternating voltage, the frequency (fl, £ 2) of the alternating voltage depending on the thickness of the flat steel strip (2) controlled or regulated
    can be provided.
    [4]
    4. Heating device (1) according to claim 3, wherein the frequency of the alternating voltage can be switched during a heating process.
    [5]
    5. Heating device (1) according to claim 3, wherein the frequency of the AC voltage is variable during a heating process
    is changeable.
    [6]
    6. Heating device (1) according to one of claims 3 to
    5, the current intensity depending on the thickness and / or
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    201800438 18
    the speed of the flat steel strip (2) controlled o-
    which can be adjusted in a controlled manner.
    [7]
    7. Heating device (1) according to one of the preceding claims with an actuator for moving at least one inductor of a transverse field module (3) in the width direction
    across the direction of transport (R).
    [8]
    8. A method for inductively heating a flat steel strip (2) in a hot rolling mill by means of a heating device (1) according to one of the preceding claims, wherein the heating device (1) is arranged between two rolling trains of the hot rolling mill and the flat steel strip (2) the heating device (1) runs through in one transport direction (R) at one speed, comprising the process steps:
    - Heating the flat steel strip (2) by a plurality of transverse field modules (3) arranged one after the other along the transport direction (R).
    [9]
    9. The method of claim 8, wherein the flat steel strip (2) also by means of a plurality of along the trans-
    port direction (R) of the flat steel strip (2) successively arranged longitudinal field modules (4), which are arranged along the transport direction (R) before or after the transverse field modules (3)
    net is heated.
    [10]
    10. The method according to claim 8 or 9, wherein the transverse field modules (3) with an alternating voltage with at least one frequency (fl, £ 2), preferably at least two frequencies (£ 1,
    f2).
    [11]
    11. The method (1) according to claim 10, wherein the frequency select
    of a heating process depending on the thickness of the flat
    steel strip (2) is switched.
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    [12]
    12. The method (1) according to claim 10, wherein the frequency during a heating process depending on the thickness of the flat
    steel strip (2) is changed variably.
    [13]
    13. The method (1) according to any one of claims 8 to 12, wherein the transverse field modules (3) with a current intensity depending on the thickness and / or the speed of the flat steel strip
    fens (2).
    [14]
    14. The method (1) according to one of claims 8 to 13 with an actuator for moving at least one inductor of a transverse field module (3) in the width direction transversely to the transport direction (R), the position of the inductor depending on the width (bl, b2) or a temperature profile of the flat steel strip (2) controlled or regulated
    becomes.
    类似技术:
    公开号 | 公开日 | 专利标题
    DE2609978C2|1987-06-11|
    DE69814513T2|2004-03-18|Rolling process and mill for thin flat products
    EP1951916B1|2012-12-19|Method and finishing train for hot-rolling starting material
    DE3635961C2|1992-03-26|
    EP2516079B1|2015-02-11|Method for hot-rolling a slab and hot-rolling mill
    DE19540978A1|1997-05-07|Production plant for the continuous or discontinuous rolling out of hot strip
    EP3341142B1|2020-01-15|Method for operating an installation based on the csp concept
    EP2806985B1|2016-11-16|Method for producing a metal strip
    EP3025799B2|2020-04-15|Rolling mill
    DE10323796B3|2005-02-10|Apparatus for heating a metal strip and equipment equipped with such a device for producing hot-rolled metal strip
    EP2955239B1|2020-03-11|Method and heating plant for the heating of sheet metal circuit boards with the formation of different temperature zones in series
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    DE60130823T2|2008-07-17|Improvements in the preheating of metal strips, especially in galvanizing or annealing plants
    DE3032222C2|1987-08-20|Device for the continuous production of butt-welded pipes
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    同族专利:
    公开号 | 公开日
    CN113613808A|2021-11-05|
    EP3715001A1|2020-09-30|
    WO2020200612A1|2020-10-08|
    AT522345B1|2020-11-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102006002505A1|2005-10-31|2007-05-03|Sms Demag Ag|Hot rolling method for e.g. thin slabs comprises heating them and passing them through finishing rollers, heat loss being compensated for by heaters between rollers which are only operated when temperature approaches lower threshold|
    DE102013224547A1|2013-11-29|2015-06-03|Sms Siemag Ag|Apparatus for increasing the temperature of elongate metallic rolling stock and finishing mill for producing and / or processing elongate metallic rolling stock|
    EP3025799A1|2014-11-28|2016-06-01|SMS group GmbH|Rolling mill, casting roller system and method for generating a metal strip|
    EP3284546A1|2016-08-19|2018-02-21|SMS Group GmbH|Method for rolling a rolling product in a rolling line and rolling line|
    DE102016224822A1|2016-08-19|2018-02-22|Sms Group Gmbh|Method for rolling a rolling stock in a rolling mill and rolling mill|
    DE102017212529A1|2017-07-20|2019-01-24|Sms Group Gmbh|Method for producing a metallic strip|
    AT507663B1|2009-04-09|2010-07-15|Siemens Vai Metals Tech Gmbh|METHOD AND DEVICE FOR PREPARING HOT ROLLING MATERIAL|CN113296463A|2021-05-17|2021-08-24|潍坊特钢集团有限公司|Control system of metal square billet machining device and implementation method thereof|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50273/2019A|AT522345B1|2019-03-29|2019-03-29|Heating device for inductive heating of a flat steel strip in a hot rolling mill|ATA50273/2019A| AT522345B1|2019-03-29|2019-03-29|Heating device for inductive heating of a flat steel strip in a hot rolling mill|
    EP19177246.6A| EP3715001A1|2019-03-29|2019-05-29|Heating device for inductive heating of a flat steel strip in a hot rolling mill|
    CN202080026191.2A| CN113613808A|2019-03-29|2020-03-04|Heating device for inductively heating a flat steel strip in a hot-rolling mill|
    PCT/EP2020/055681| WO2020200612A1|2019-03-29|2020-03-04|Heating device for the inductive heating of a flat steel strip in a hot rolling mill|
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