JP2023003554A - Cylindrical metal coil treatment facility - Google Patents

Cylindrical metal coil treatment facility Download PDF

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JP2023003554A
JP2023003554A JP2021104696A JP2021104696A JP2023003554A JP 2023003554 A JP2023003554 A JP 2023003554A JP 2021104696 A JP2021104696 A JP 2021104696A JP 2021104696 A JP2021104696 A JP 2021104696A JP 2023003554 A JP2023003554 A JP 2023003554A
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coil
cylindrical metal
metal strip
metal coil
cylindrical
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芳章 末松
Yoshiaki Suematsu
芳明 廣田
Yoshiaki Hirota
純也 中原
Junya Nakahara
伸一 山口
Shinichi Yamaguchi
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Nippon Steel Corp
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    • 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

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Abstract

To prevent cracking of a metal strip and minimize constraints in a process when the metal strip is wound out from the cylindrical metal coil.SOLUTION: A cylindrical metal coil facility comprises: winding-out means for winding out a metal strip from a cylindrical metal coil having the metal strip cylindrically wound thereon; an induction coil opposed to the outer peripheral surface of the cylindrical metal coil in the vicinity of a part in which the metal strip is wound out from the cylindrical metal coil and disposed to generate eddy current on the surface layer of the cylindrical metal coil; control means for controlling a frequency of AC current supplied to the induction coil so that the penetration depth of the eddy current can correspond to the plate thickness of the metal strip; and movement means for moving the induction coil in the radial direction of the cylindrical metal coil following a change of the outer diameter of the cylindrical metal coil caused by the winding-out.SELECTED DRAWING: Figure 1

Description

本発明は、円筒状金属コイルの処理設備に関する。 The present invention relates to a processing facility for cylindrical metal coils.

高張力鋼や電磁鋼、ステンレス鋼などの高合金鋼では、低温時の靱性が低いものが多い。このような高合金鋼の鋼板をコイルとして円筒状に巻回した場合、圧延や連続焼鈍などの処理のためにコイルから鋼板を巻き出す際に、鋼板が巻き取られた形状から平坦な形状に変形させられることによって曲げ応力が生じ、割れる場合がある。そこで、巻き出し前に靱性が高くなる脆化温度以上までコイルを加熱する必要が生じる。この加熱は、例えばガス炉や電気炉においてコイル全体をバッチ加熱することによって行われるが、コイル全体を加熱するためには表層に加えられた熱が内部まで伝熱されるだけの時間が必要になるため、生産効率を低下させる要因になっていた。 Many high-alloy steels such as high-strength steels, electromagnetic steels, and stainless steels have low toughness at low temperatures. When such a high-alloy steel plate is wound into a coil into a cylindrical shape, when the steel plate is unwound from the coil for processing such as rolling or continuous annealing, the coiled shape of the steel plate changes to a flat shape. Bending stress is generated by being deformed, and it may crack. Therefore, it is necessary to heat the coil to a temperature equal to or higher than the embrittlement temperature at which toughness increases before unwinding. This heating is performed, for example, by batch heating the entire coil in a gas furnace or an electric furnace, but in order to heat the entire coil, it takes time for the heat applied to the surface layer to be transferred to the inside. Therefore, it has become a factor of lowering the production efficiency.

上記のような金属コイルのバッチ加熱の問題に対して、特許文献１に記載された技術では、冷間圧延設備内での加熱装置の１つとして、圧延機にコイルを払い出しするペイオフリール位置にペイオフリールのリールドラム（巻き芯）およびコイルを取り囲むボックス型の予備加熱装置が設けられ、熱風ヒーターを用いてコイルを予備加熱する。コイルから引き出された鋼板は、矯正機に通され、加熱装置でさらに加熱された後に圧延機に通される。前工程の直後にコイルをペイオフリールに搬送し、上記のような予備加熱および加熱を経て圧延処理を行うことによって、バッチ加熱装置を使用しなくても鋼板の割れを防止しながら圧延処理を行うことが可能になる。 In order to solve the problem of batch heating of metal coils as described above, the technique described in Patent Document 1 uses a payoff reel as one of the heating devices in the cold rolling equipment to feed the coils to the rolling mill. A box-shaped preheating device surrounding the reel drum (winding core) of the payoff reel and the coil is provided, and the coil is preheated using a hot air heater. The steel sheet pulled out from the coil is passed through a straightening machine, further heated by a heating device, and then passed through a rolling mill. Immediately after the pre-process, the coil is transported to the pay-off reel, preheated and heated as described above, and then subjected to the rolling process, whereby the rolling process is performed while preventing cracking of the steel sheet without using a batch heating device. becomes possible.

特開２０１１－７９０２５号公報JP 2011-79025 A

上記の特許文献１に記載されたような予備加熱装置では、加熱装置の型式がペイオフリールのリールドラムおよびコイルを取り囲むボックス型であるため、コイルは内層部及び外層部が主として加熱されることになりコイル全体の所定温度までの加熱にはそれなりの処理時間を要するものであり工程上の制約はなおも存在する。 In the preheating device as described in Patent Document 1, the type of the heating device is a box-shaped one that surrounds the reel drum and coil of the payoff reel. Therefore, it takes a certain processing time to heat the entire coil to a predetermined temperature, and there are still restrictions on the process.

そこで、本発明は、円筒状金属コイルから金属帯板を巻き出すときの金属帯板の割れを防止しつつ、工程上の制約を最小化することが可能な円筒状金属コイルの処理設備を提供することを目的とする。 Therefore, the present invention provides a processing facility for cylindrical metal coils that can minimize the restrictions on the process while preventing the metal strip from cracking when the metal strip is unwound from the cylindrical metal coil. intended to

［１］金属帯板が円筒状に巻回された円筒状金属コイルから上記金属帯板を巻き出す巻き出し手段と、上記金属帯板が上記円筒状金属コイルから巻き出される部位の近傍で上記円筒状金属コイルの外周面に対向し、上記円筒状金属コイルの表層に渦電流を発生させるように配置された誘導コイルと、上記渦電流の浸透深さが上記金属帯板の板厚に対応するように上記誘導コイルに供給する交流電流の周波数を制御する制御手段と、巻き出しによる上記円筒状金属コイルの外径の変化に追従して上記誘導コイルを上記円筒状金属コイルの径方向に移動させる移動手段とを備える円筒状金属コイルの処理設備。
［２］上記誘導コイルとは異なる部位で上記円筒状金属コイルの外周面に対向し、上記円筒状金属コイルの表層に渦電流を発生させるように配置された追加の誘導コイルをさらに備える、［１］に記載の円筒状金属コイルの処理設備。
［３］巻き出された上記金属帯板を処理する圧延機または連続焼鈍炉をさらに備える、［１］または［２］に記載の円筒状金属コイルの処理設備。
［４］巻き出された上記金属帯板を再び巻き取る巻き取り手段と、上記巻き出し手段と上記巻き取り手段との間で上記金属帯板を加熱する加熱装置とをさらに備える、［１］または［２］に記載の円筒状金属コイルの処理設備。
［５］上記加熱装置は、上記金属帯板に渦電流を発生させるように配置された誘導コイルを含む、［４］に記載の円筒状金属コイルの処理設備。 [1] Unwinding means for unwinding the metal strip from a cylindrical metal coil in which the metal strip is wound in a cylindrical shape; An induction coil facing the outer peripheral surface of the cylindrical metal coil and arranged so as to generate an eddy current on the surface layer of the cylindrical metal coil, and a penetration depth of the eddy current corresponding to the plate thickness of the metal strip. and a control means for controlling the frequency of the alternating current supplied to the induction coil so as to cause the induction coil to move in the radial direction of the cylindrical metal coil following changes in the outer diameter of the cylindrical metal coil due to unwinding. A processing facility for cylindrical metal coils, comprising a moving means for moving.
[2] Further comprising an additional induction coil facing the outer peripheral surface of the cylindrical metal coil at a location different from the induction coil and arranged to generate an eddy current in the surface layer of the cylindrical metal coil, [ 1].
[3] The cylindrical metal coil processing facility according to [1] or [2], further comprising a rolling mill or a continuous annealing furnace for processing the unwound metal strip.
[4] Further comprising winding means for winding again the unwound metal strip, and a heating device for heating the metal strip between the unwinding means and the winding means, [1] Or the processing facility for cylindrical metal coils according to [2].
[5] The cylindrical metal coil processing facility according to [4], wherein the heating device includes an induction coil arranged to generate an eddy current in the metal strip.

上記の構成によれば、誘導コイルが発生させる渦電流によって、円筒状金属コイルから巻き出される直前の金属帯板が加熱される。誘導加熱では加熱前の円筒状金属コイルの温度に関わらず所望の温度まで加熱することが可能であるため、オフライン処理のバッチ加熱やオンライン処理でもボックス加熱のような工程上の制約をなくすことができる。従って、上記の構成によれば、円筒状金属コイルから金属帯板を巻き出すときの金属帯板の割れを防止しつつ、工程上の制約を最小化することができる。 According to the above configuration, the eddy current generated by the induction coil heats the metal strip just before it is unwound from the cylindrical metal coil. With induction heating, it is possible to heat to the desired temperature regardless of the temperature of the cylindrical metal coil before heating, so batch heating for offline processing and online processing can eliminate process restrictions such as box heating. can. Therefore, according to the above configuration, it is possible to minimize the restrictions on the process while preventing the metal strip from cracking when the metal strip is unwound from the cylindrical metal coil.

本発明の第１の実施形態に係る円筒状金属コイルの処理設備の構成を概略的に示す図である。1 is a diagram schematically showing the configuration of a processing facility for cylindrical metal coils according to a first embodiment of the present invention; FIG. 本発明の第２の実施形態に係る円筒状金属コイルの処理設備の構成を概略的に示す図である。FIG. 6 is a diagram schematically showing the configuration of a processing facility for cylindrical metal coils according to a second embodiment of the present invention; 本発明の第３の実施形態に係る円筒状金属コイルの処理設備の構成を概略的に示す図である。FIG. 3 is a diagram schematically showing the configuration of a processing facility for cylindrical metal coils according to a third embodiment of the present invention;

以下に添付図面を参照しながら、本発明の好適な実施形態について詳細に説明する。なお、本明細書および図面において、実質的に同一の機能構成を有する構成要素については、同一の符号を付することにより重複した説明を省略する。 Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the present specification and drawings, constituent elements having substantially the same functional configuration are denoted by the same reference numerals, thereby omitting redundant description.

（第１の実施形態）
図１は、本発明の第１の実施形態に係る円筒状金属コイルの処理設備の構成を概略的に示す図である。処理設備１０は、金属帯板Ｓが円筒状に巻回された円筒状金属コイル１１から金属帯板Ｓを巻き出す巻き出し手段を構成するペイオフリール（リールドラム部のみ図示し、その他の部位は図示を省略。以下同じ。）１２と、円筒状金属コイル１１の外周面に対向する誘導コイル１３と、誘導コイル１３に交流電流を供給する高周波電源１４と、誘導コイル１３を円筒状金属コイル１１の径方向に移動させる誘導コイル移動手段１５とを含む。 (First embodiment)
FIG. 1 is a diagram schematically showing the configuration of a processing facility for cylindrical metal coils according to a first embodiment of the present invention. The processing facility 10 includes a payoff reel (only the reel drum portion is shown), which constitutes unwinding means for unwinding the metal strip S from a cylindrical metal coil 11 around which the metal strip S is wound. 12, an induction coil 13 facing the outer peripheral surface of the cylindrical metal coil 11, a high-frequency power supply 14 for supplying alternating current to the induction coil 13, and the induction coil 13 being connected to the cylindrical metal coil 11. and an induction coil moving means 15 for moving in the radial direction of.

ここで、誘導コイル１３は、金属帯板Ｓが円筒状金属コイル１１から巻き出される部位の近傍で円筒状金属コイル１１の外周面に対向する。つまり、誘導コイル１３は、巻き出される金属帯板Ｓの搬送方向でいうと、金属帯板Ｓが円筒状金属コイル１１の外周面から離れる位置Ｐよりも手前側に配置される。誘導コイル１３は、例えば円筒状金属コイル１１の径方向に磁束を発生させるように配置される平巻状のコイルであり、円筒状金属コイル１１の表層に渦電流を発生させる。従って、誘導コイル１３が発生させる渦電流によって加熱されるのは、円筒状金属コイル１１から巻き出される直前の金属帯板Ｓである。 Here, the induction coil 13 faces the outer peripheral surface of the cylindrical metal coil 11 in the vicinity of the portion where the metal strip S is unwound from the cylindrical metal coil 11 . In other words, the induction coil 13 is arranged on the front side of the position P where the metal strip S is separated from the outer peripheral surface of the cylindrical metal coil 11 in the conveying direction of the unwound metal strip S. The induction coil 13 is, for example, a flat-wound coil arranged so as to generate magnetic flux in the radial direction of the cylindrical metal coil 11 , and generates an eddy current on the surface layer of the cylindrical metal coil 11 . Therefore, it is the metal strip S immediately before being unwound from the cylindrical metal coil 11 that is heated by the eddy currents generated by the induction coil 13 .

一方、誘導コイル１３に交流電流を供給する高周波電源１４は、例えばインバータなどによって交流電流の周波数を制御する制御手段として機能する。高周波電源１４は、誘導コイル１３に供給される交流電源の周波数を、誘導コイル１３が円筒状金属コイル１１の表層に発生させる渦電流の浸透深さが金属帯板Ｓの板厚に対応するように制御する。この場合、渦電流の大部分は金属帯板Ｓの１枚分、すなわち円筒状金属コイル１１の最表層にしか浸透せず、従って実質的に加熱されるのは円筒状金属コイル１１の最表層の金属帯板Ｓのみになる。 On the other hand, the high-frequency power supply 14 that supplies alternating current to the induction coil 13 functions as control means for controlling the frequency of the alternating current, for example, by an inverter. The high-frequency power supply 14 adjusts the frequency of the AC power supplied to the induction coil 13 so that the penetration depth of the eddy current generated by the induction coil 13 on the surface layer of the cylindrical metal coil 11 corresponds to the thickness of the metal strip S. to control. In this case, most of the eddy current penetrates only one sheet of the metal strip S, that is, the outermost layer of the cylindrical metal coil 11, so that the outermost layer of the cylindrical metal coil 11 is substantially heated. It becomes only the metal strip plate S of

上記のように、誘導コイル１３が実質的に円筒状金属コイル１１の最表層の金属帯板Ｓのみを加熱することによって、円筒状金属コイル１１から巻き出される直前の金属帯板Ｓを集中的に渦電流で加熱することができる。これによって、後工程での割れを防止するのに必要十分な温度を狙って金属帯板Ｓを加熱することが容易になる。誘導コイル１３は、金属帯板Ｓを全幅にわたって均一に加熱するように配置されてもよいし、例えば搬送中の温度低下が生じやすい幅方向の端部の昇温量が大きくなるように配置されてもよい。 As described above, the induction coil 13 substantially heats only the outermost metal strip S of the cylindrical metal coil 11, so that the metal strip S just before being unwound from the cylindrical metal coil 11 is concentrated. can be heated by eddy currents. This makes it easy to heat the metal strip S to a temperature that is sufficient to prevent cracking in the subsequent process. The induction coils 13 may be arranged so as to uniformly heat the entire width of the metal strip S, or arranged so that the amount of temperature increase at the ends in the width direction, where the temperature is likely to drop during transportation, increases. may

また、円筒状金属コイル１１の層間における絶縁材の介挿や絶縁性スケールの生成がない場合、渦電流による加熱の範囲を実質的に最表層に限定することによって層間短絡によるスパークの発生を実質的に抑制することができる。一方、円筒状金属コイル１１の層間が絶縁材や絶縁性スケールによって絶縁されている場合は、渦電流による加熱の範囲は必ずしも最表層に限定されなくてもよく、例えば最表層を含む１０層以下の範囲で設定されてもよい。 Further, when there is no interposition of an insulating material between the layers of the cylindrical metal coil 11 and no generation of an insulating scale, the generation of sparks due to a short circuit between layers can be substantially prevented by limiting the range of heating by eddy current to the outermost layer. can be effectively suppressed. On the other hand, when the layers of the cylindrical metal coil 11 are insulated by insulating material or insulating scale, the range of heating by eddy current does not necessarily have to be limited to the outermost layer. may be set in the range of

誘導コイル移動手段１５は、例えばエアシリンダや電動シリンダを駆動部として含み、誘導コイル１３を円筒状金属コイル１１の径方向に移動させる。円筒状金属コイル１１の外径は金属帯板Ｓの巻き出しによって徐々に小さくなる。誘導コイル移動手段１５は、このような円筒状金属コイル１１の外径の変化に追従して誘導コイル１３を移動させる。これによって、金属帯板Ｓの巻き出しが進んでも円筒状金属コイル１１の外周面と誘導コイル１３との間の間隔を保持し、誘導コイル１３に供給する交流電流の電力を変えることなく、巻き出しの開始から終了まで金属帯板Ｓを均等な温度で加熱することができる。 The induction coil moving means 15 includes, for example, an air cylinder or an electric cylinder as a drive unit, and moves the induction coil 13 in the radial direction of the cylindrical metal coil 11 . The outer diameter of the cylindrical metal coil 11 gradually decreases as the metal strip S is unwound. The induction coil moving means 15 moves the induction coil 13 following such changes in the outer diameter of the cylindrical metal coil 11 . As a result, the gap between the outer peripheral surface of the cylindrical metal coil 11 and the induction coil 13 is maintained even if the unwinding of the metal strip S progresses, and the power of the alternating current supplied to the induction coil 13 is not changed. The metal strip S can be heated at a uniform temperature from the start to the end of unloading.

上記で説明したような処理設備１０は、例えば金属帯板Ｓの圧延処理、または連続焼鈍処理を実施する設備である。図示されていないが、圧延処理を実施する場合、処理設備１０は、図１に示された構成要素に加えて、円筒状金属コイル１１から巻き出された金属帯板Ｓを処理する圧延機などの構成要素を含む。連続焼鈍処理を実施する場合、処理設備１０は、円筒状金属コイル１１から巻き出された金属帯板Ｓを処理する連続焼鈍炉などの構成要素を含む。 The processing facility 10 as described above is, for example, a facility for performing a rolling process or a continuous annealing process on the metal strip S. As shown in FIG. Although not shown, when rolling is performed, the processing equipment 10 includes, in addition to the components shown in FIG. contains the components of When carrying out a continuous annealing process, the processing equipment 10 includes components such as a continuous annealing furnace for processing the metal strip S unwound from the cylindrical metal coil 11 .

（第２の実施形態）
図２は、本発明の第２の実施形態に係る円筒状金属コイルの処理設備の構成を概略的に示す図である。処理設備１０Ａは、上記の第１の実施形態と同様に、円筒状金属コイル１１から金属帯板Ｓを巻き出す巻き出し手段を構成するペイオフリール１２を含む。本実施形態では、円筒状金属コイル１１の外周面に対向する３つの誘導コイル１３Ａ，１３Ｂ，１３Ｃが配置される。なお、それぞれの誘導コイルに交流電流を供給し、交流電流の周波数を制御する制御手段として機能する高周波電源については図示を省略している。処理設備１０Ａは、誘導コイル１３Ａ，１３Ｂ，１３Ｃのそれぞれを円筒状金属コイル１１の径方向に移動させる誘導コイル移動手段１５Ａ，１５Ｂ，１５Ｃをさらに含む。 (Second embodiment)
FIG. 2 is a diagram schematically showing the configuration of a processing facility for cylindrical metal coils according to a second embodiment of the present invention. The processing facility 10A includes a payoff reel 12 that constitutes unwinding means for unwinding the metal strip S from the cylindrical metal coil 11, as in the first embodiment. In this embodiment, three induction coils 13A, 13B, and 13C are arranged facing the outer peripheral surface of the cylindrical metal coil 11 . A high-frequency power source that supplies alternating current to each induction coil and functions as control means for controlling the frequency of the alternating current is omitted from the drawing. The treatment facility 10A further includes induction coil moving means 15A, 15B, 15C for moving the induction coils 13A, 13B, 13C in the radial direction of the cylindrical metal coil 11, respectively.

本実施形態では、第１の実施形態と同様に金属帯板Ｓが円筒状金属コイル１１から巻き出される部位の近傍で円筒状金属コイル１１の外周面に対向する誘導コイル１３Ａに加えて、誘導コイル１３Ａとは異なる部位で円筒状金属コイル１１の外周面に対向する追加の誘導コイル１３Ｂ，１３Ｃが配置される。誘導コイル１３Ａ，１３Ｂ，１３Ｃも、上記の第１の実施形態における誘導コイル１３と同様に例えば円筒状金属コイル１１の径方向に磁束を発生させるように配置される平巻状のコイルであり、周波数が制御された交流電流を供給されることによって円筒状金属コイル１１の全幅にわたって表層に渦電流を発生させる。誘導コイル移動手段１５Ａ，１５Ｂ，１５Ｃは、例えばエアシリンダや電動シリンダを駆動部として含み、誘導コイル１３Ａ，１３Ｂ，１３Ｃのそれぞれを巻き出しによる円筒状金属コイル１１の外径の変化に追従して移動させる。 In this embodiment, as in the first embodiment, in addition to the induction coil 13A facing the outer peripheral surface of the cylindrical metal coil 11 in the vicinity of the portion where the metal strip S is unwound from the cylindrical metal coil 11, an induction Additional induction coils 13B and 13C facing the outer peripheral surface of the cylindrical metal coil 11 are arranged at locations different from the coil 13A. The induction coils 13A, 13B, and 13C are also flat-wound coils arranged to generate magnetic flux in the radial direction of the cylindrical metal coil 11, for example, like the induction coil 13 in the first embodiment, An eddy current is generated in the surface layer over the entire width of the cylindrical metal coil 11 by supplying an alternating current whose frequency is controlled. The induction coil moving means 15A, 15B, 15C include, for example, an air cylinder or an electric cylinder as a drive unit, and follow changes in the outer diameter of the cylindrical metal coil 11 by unwinding the induction coils 13A, 13B, 13C, respectively. move.

上記で説明したような第２の実施形態に係る処理設備１０Ａも、例えば金属帯板Ｓの圧延処理、または連続焼鈍処理を実施する設備であり、図示されていない圧延機、または連続焼鈍炉などの構成要素をさらに含む。本実施形態では、複数の誘導コイル１３Ａ，１３Ｂ，１３Ｃを用いて円筒状金属コイル１１の表層を渦電流で加熱することによって、加熱時間を確保することができ、温度制御性の向上や処理能力の改善が期待できる。 The processing facility 10A according to the second embodiment as described above is also, for example, a facility for performing rolling processing or continuous annealing processing of the metal strip S, such as a rolling mill or a continuous annealing furnace (not shown). further comprising components of In this embodiment, by heating the surface layer of the cylindrical metal coil 11 with eddy currents using a plurality of induction coils 13A, 13B, and 13C, the heating time can be secured, and the temperature controllability can be improved and the processing capacity can be improved. improvement can be expected.

（第３の実施形態）
図３は、本発明の第３の実施形態に係る円筒状金属コイルの処理設備の構成を概略的に示す図である。処理設備２０は、上記の第１の実施形態と同様に、円筒状金属コイル１１から金属帯板Ｓを巻き出す巻き出し手段を構成するペイオフリール１２と、金属帯板Ｓが円筒状金属コイル１１から巻き出される部位の近傍で円筒状金属コイル１１の外周面に対向する誘導コイル１３と、誘導コイル１３を円筒状金属コイル１１の径方向に移動させる誘導コイル移動手段１５とを含む。本実施形態では、処理設備２０がさらに、ペイオフリール１２で巻き出された金属帯板Ｓを再び円筒状金属コイル２１として巻き取る巻き取り手段を構成する巻き取りリール（リールドラム部のみ図示し、その他の部位は図示を省略。以下同じ。）２２と、ペイオフリール１２と巻き取りリール２２との間で金属帯板Ｓを加熱する加熱装置２６とを含む。加熱装置２６は、例えば金属帯板Ｓに渦電流を発生させるように配置された誘導コイルであってもよい。なお、誘導コイル１３、および誘導コイルである場合の加熱装置２６に交流電流を供給し、交流電流の周波数を制御する制御手段として機能する高周波電源については図示を省略している。また、本実施形態でも上記の第２の実施形態のように複数の誘導コイルを配置する構成が可能である。 (Third Embodiment)
FIG. 3 is a diagram schematically showing the configuration of a processing facility for cylindrical metal coils according to a third embodiment of the present invention. As in the first embodiment, the processing equipment 20 includes a pay-off reel 12 that constitutes unwinding means for unwinding the metal strip S from the cylindrical metal coil 11, and It includes an induction coil 13 facing the outer peripheral surface of the cylindrical metal coil 11 in the vicinity of the portion where it is unwound from, and an induction coil moving means 15 for moving the induction coil 13 in the radial direction of the cylindrical metal coil 11 . In the present embodiment, the processing facility 20 further includes a take-up reel (only the reel drum portion is shown) that constitutes a take-up means for winding the metal strip S unwound by the payoff reel 12 again as a cylindrical metal coil 21. (Other parts are omitted. Same below.) 22 and a heating device 26 for heating the metal strip S between the payoff reel 12 and the take-up reel 22 . The heating device 26 may be an induction coil arranged to generate eddy currents in the metal strip S, for example. A high-frequency power source that supplies alternating current to the induction coil 13 and the heating device 26 in the case of an induction coil and functions as control means for controlling the frequency of the alternating current is omitted from the drawing. Also, in this embodiment, it is possible to arrange a plurality of induction coils as in the second embodiment.

本実施形態において、処理設備２０は、金属帯板Ｓの加熱処理を実施する設備である。金属帯板Ｓは、円筒状金属コイル１１から巻き出されるときに誘導コイル１３によって加熱された後、加熱装置２６においてさらに加熱されて、再び円筒状金属コイル２１として巻き取られ、次工程に搬送される。このような処理設備２０は、例えばバッチ熱処理炉のような円筒状金属コイルの全体を加熱する中間昇温装置の代替として利用することができる。円筒状金属コイルを巻き取られた形状のままバッチ加熱すると表層に加えられた熱が内部まで伝熱されるだけの時間が必要になるが、処理設備２０では金属帯板Ｓを一旦巻き出した上で円筒状金属コイル状態では内部に位置した金属帯板Ｓの部位も直接的に加熱することができるため、コイル全体の加熱に要する時間はバッチ加熱の場合よりも短くなる。また、搬送中の温度低下が生じやすい幅方向の端部の温度を予め高くしたり、再度巻き取られた後にコイルの外周面側になる巻き出し時の終端部の温度が高くなるように金属帯板Ｓの長手方向に温度勾配をつけたりすることも可能になる。 In this embodiment, the processing facility 20 is a facility for heat-treating the metal strip S. As shown in FIG. The metal strip S is heated by the induction coil 13 when it is unwound from the cylindrical metal coil 11, is further heated by the heating device 26, is wound again as the cylindrical metal coil 21, and is conveyed to the next process. be done. Such a processing facility 20 can be used, for example, as a substitute for an intermediate heating device that heats the entire cylindrical metal coil, such as a batch heat treatment furnace. If the cylindrical metal coil is batch-heated in the wound shape, it takes time for the heat applied to the surface layer to be transferred to the inside. In the state of the cylindrical metal coil, the portion of the metal strip S positioned inside can also be directly heated, so the time required to heat the entire coil is shorter than in the case of batch heating. In addition, the temperature of the ends in the width direction, which tend to drop in temperature during transportation, is increased in advance, and the temperature of the terminal end, which is the outer peripheral surface side of the coil after being rewound, is increased during unwinding. It is also possible to create a temperature gradient in the longitudinal direction of the strip S.

なお、図３に示された例では処理設備２０に円筒状金属コイル１１から巻き出される部位の近傍で金属帯板Ｓを加熱する誘導コイル１３が配置されているが、例えば金属帯板Ｓの材質や、前工程から搬入されたときの円筒状金属コイル１１の温度によって、巻き出し時に割れる可能性が低い場合には、誘導コイル１３および誘導コイル移動手段１５を使用しないことも可能である。 In the example shown in FIG. 3, the induction coil 13 for heating the metal strip S is arranged in the vicinity of the portion where the metal strip S is unwound from the cylindrical metal coil 11 in the processing equipment 20. Depending on the material and the temperature of the cylindrical metal coil 11 when it is brought in from the previous process, if the possibility of cracking during unwinding is low, the induction coil 13 and the induction coil moving means 15 may not be used.

以上、添付図面を参照しながら本発明の好適な実施形態について詳細に説明したが、本発明はこれらの例に限定されない。本発明の属する技術の分野の当業者であれば、請求の範囲に記載された技術的思想の範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、これらについても、当然に本発明の技術的範囲に属するものと了解される。 Although the preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to these examples. It is obvious that a person skilled in the art of the technical field to which the present invention belongs can conceive of various modifications or modifications within the scope of the technical idea described in the claims. Naturally, it is understood that it belongs to the technical scope of the present invention.

１０，１０Ａ，２０…処理設備、１１…円筒状金属コイル、１２…ペイオフリール（リールドラム）、１３，１３Ａ，１３Ｂ，１３Ｃ…誘導コイル、１４…高周波電源、１５，１５Ａ，１５Ｂ，１５Ｃ…誘導コイル移動手段、２１…円筒状金属コイル、２２…巻き取りリール（リールドラム）、２６…加熱装置、Ｓ…金属帯板。 10, 10A, 20... processing equipment, 11... cylindrical metal coil, 12... payoff reel (reel drum), 13, 13A, 13B, 13C... induction coil, 14... high frequency power supply, 15, 15A, 15B, 15C... induction Coil moving means 21 Cylindrical metal coil 22 Take-up reel (reel drum) 26 Heating device S Metal strip.

Claims (5)

金属帯板が円筒状に巻回された円筒状金属コイルから前記金属帯板を巻き出す巻き出し手段と、
前記金属帯板が前記円筒状金属コイルから巻き出される部位の近傍で前記円筒状金属コイルの外周面に対向し、前記円筒状金属コイルの表層に渦電流を発生させるように配置された誘導コイルと、
前記渦電流の浸透深さが前記金属帯板の板厚に対応するように前記誘導コイルに供給する交流電流の周波数を制御する制御手段と、
巻き出しによる前記円筒状金属コイルの外径の変化に追従して前記誘導コイルを前記円筒状金属コイルの径方向に移動させる移動手段と
を備える円筒状金属コイルの処理設備。 unwinding means for unwinding the metal strip from a cylindrical metal coil in which the metal strip is wound in a cylindrical shape;
An induction coil facing the outer peripheral surface of the cylindrical metal coil in the vicinity of the portion where the metal band plate is unwound from the cylindrical metal coil and arranged so as to generate an eddy current in the surface layer of the cylindrical metal coil. When,
control means for controlling the frequency of the alternating current supplied to the induction coil so that the penetration depth of the eddy current corresponds to the thickness of the metal strip;
A processing facility for a cylindrical metal coil, comprising: moving means for moving the induction coil in the radial direction of the cylindrical metal coil following changes in the outer diameter of the cylindrical metal coil due to unwinding. 前記誘導コイルとは異なる部位で前記円筒状金属コイルの外周面に対向し、前記円筒状金属コイルの表層に渦電流を発生させるように配置された追加の誘導コイルをさらに備える、請求項１に記載の円筒状金属コイルの処理設備。 2. The method according to claim 1, further comprising an additional induction coil facing the outer peripheral surface of the cylindrical metal coil at a location different from the induction coil and arranged to generate an eddy current in a surface layer of the cylindrical metal coil. A treatment facility for cylindrical metal coils as described. 巻き出された前記金属帯板を処理する圧延機または連続焼鈍炉をさらに備える、請求項１または請求項２に記載の円筒状金属コイルの処理設備。 3. The cylindrical metal coil processing facility according to claim 1, further comprising a rolling mill or a continuous annealing furnace for processing the unwound metal strip. 巻き出された前記金属帯板を再び巻き取る巻き取り手段と、
前記巻き出し手段と前記巻き取り手段との間で前記金属帯板を加熱する加熱装置と
をさらに備える、請求項１または請求項２に記載の円筒状金属コイルの処理設備。 winding means for winding again the unrolled metal strip;
3. The processing facility for a cylindrical metal coil according to claim 1, further comprising: a heating device for heating said metal strip plate between said unwinding means and said winding means. 前記加熱装置は、前記金属帯板に渦電流を発生させるように配置された誘導コイルを含む、請求項４に記載の円筒状金属コイルの処理設備。 5. The cylindrical metal coil processing facility of claim 4, wherein the heating device includes an induction coil arranged to generate eddy currents in the metal strip.
JP2021104696A 2021-06-24 2021-06-24 Cylindrical metal coil treatment facility Pending JP2023003554A (en)

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