JPWO2008090597A1 - Heating control method and apparatus for steel plate production line - Google Patents

Heating control method and apparatus for steel plate production line Download PDF

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JPWO2008090597A1
JPWO2008090597A1 JP2007544677A JP2007544677A JPWO2008090597A1 JP WO2008090597 A1 JPWO2008090597 A1 JP WO2008090597A1 JP 2007544677 A JP2007544677 A JP 2007544677A JP 2007544677 A JP2007544677 A JP 2007544677A JP WO2008090597 A1 JPWO2008090597 A1 JP WO2008090597A1
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steel plate
steel sheet
steel
heating
induction heating
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康治 堂上
康治 堂上
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Toshiba Mitsubishi Electric Industrial Systems Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • 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
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
    • 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
    • C21D11/00—Process control or regulation for heat treatments
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0405—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing of ferrous alloys
    • 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
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/60—Continuous furnaces for strip or wire with induction heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Forging (AREA)

Abstract

鋼材を圧延、鍛造もしくは矯正加工するラインに鋼板の加熱処理により、所望の鋼板製品を製造する鋼板製造ラインの加熱制御方法及びその装置を提供するもので、温度制御のみならず、材質を誘導加熱装置の加熱条件として加熱制御を行うことが可能となる。鋼板を圧延、鍛造若しくは矯正加工する処理と鋼板を加熱する加熱処理により、所望の鋼板製品を製造する鋼板製造ラインにおいて、鋼板の加熱処理として、鋼板幅方向全体に渡って加熱するソレノイド式誘導加熱装置と、鋼板材質を測定する材質センサを配置して、材質センサにより鋼板材料の材質（粒径）を測定して、その測定値に基づいて加熱条件を制御して、鋼板を加熱することを特徴とするものである。It provides a heating control method and apparatus for a steel plate production line for producing a desired steel plate product by heating the steel plate to a line for rolling, forging or straightening the steel material, and not only temperature control but also induction heating of the material. Heating control can be performed as a heating condition of the apparatus. Solenoid induction heating that heats the entire length of the steel sheet as a heat treatment of the steel sheet in a steel sheet production line that produces a desired steel sheet product by rolling, forging or straightening the steel sheet and heating the steel sheet. A device and a material sensor for measuring the steel plate material are arranged, the material sensor measures the material (particle size) of the steel plate, and the heating condition is controlled based on the measured value to heat the steel plate. It is a feature.

Description

この発明は、鋼材を圧延、鍛造もしくは矯正加工するラインに鋼板の加熱処理により、所望の鋼板製品を製造する鋼板製造ラインの加熱制御方法及びその装置に関するものである。   The present invention relates to a heating control method and apparatus for a steel sheet production line for producing a desired steel sheet product by heat treatment of the steel sheet on a line for rolling, forging or straightening the steel material.

一般に鋼板製造ラインでは、被加熱材（圧延材）を加熱炉で圧延可能な温度にまで加熱し、圧延機にて、所望の板厚や板幅を有する製品を得ている。   In general, in a steel sheet production line, a material to be heated (rolled material) is heated to a temperature at which it can be rolled in a heating furnace, and a product having a desired plate thickness and plate width is obtained with a rolling mill.

このような鋼板製造ラインにおいては、近年、鋼板の温度降下による圧延機の負荷軽減および昇温や均熱目的として鋼板製造ラインに誘導加熱装置を設置する事が一般的な手段となっている。   In such a steel plate production line, in recent years, it has become a common means to install an induction heating device in the steel plate production line for the purpose of reducing the load on the rolling mill due to the temperature drop of the steel plate and for raising the temperature and soaking.

従来、加熱条件に対し、加熱温度目標値は製品仕様毎に長年に亘る経験に基づいて決められ、これを達成するように、温度制御を行う方法が一般的であった。ところが、近年、製品仕様への要求の高度化、多様化が著しく、経験に基づく決め方では目標値を必ずしも適正に決めることができず、更には鋼板の昇温や均熱だけでは所望の材質が得られないケースが生じてきた。   Conventionally, with respect to heating conditions, the heating temperature target value is determined based on experience over many years for each product specification, and a method of performing temperature control to achieve this has been common. However, in recent years, the demand for product specifications has become increasingly sophisticated and diversified, and the target value cannot always be determined appropriately by the method of determination based on experience. Some cases have not been achieved.

昇温や均熱を目的として、ライン上に配置された温度計により測定された温度を用いて、誘導加熱装置の供給電力を制御して、目標温度を維持することを目的としたものもある（例えば、特許文献１、２参照）。   For the purpose of temperature rise and soaking, there is also the one that aims to maintain the target temperature by controlling the power supplied to the induction heating device using the temperature measured by the thermometer placed on the line (For example, refer to Patent Documents 1 and 2).

また、材質測定センサによる測定結果により所望の材質に制御することを特徴とした材質モデルに基づく制御を目的としたものもある（例えば、特許文献３参照）。   In addition, there is also an object for control based on a material model characterized by controlling to a desired material based on a measurement result by a material measurement sensor (see, for example, Patent Document 3).

日本特開平０９−３１４２１６号公報Japanese Unexamined Patent Publication No. 09-314216 日本特開平１０−２０２３１１号公報Japanese Unexamined Patent Publication No. 10-20211 日本特開平０５−１７１２５８号公報Japanese Unexamined Patent Publication No. 05-171258

従来の温度計による温度制御では、加熱条件と鋼板の材質とその鋼板内面温度としての目標値設定と、温度計の検出精度が重要となる。ところが、温度計の検出はあくまで表面温度の測定であることと、水蒸気やスケール等の影響による測定誤差も生じて、ダイナミックな制御を行うことは困難であり、事前に測定した製品温度を基にした温度設定による加熱しか出来なかった。   In temperature control using a conventional thermometer, heating conditions, steel plate material, target value setting as the steel plate inner surface temperature, and thermometer detection accuracy are important. However, the detection of the thermometer is only a measurement of the surface temperature, and measurement errors due to the effects of water vapor, scale, etc. also occur, making it difficult to perform dynamic control, based on the product temperature measured in advance. Only heating with the set temperature was possible.

また、材質モデルに基づく制御方法では、材質モデルの予測精度が製品の材質を目標値に一致させるために重要となる。ところが、加熱条件と製品の材質の関係は極めて複雑であり、その予測精度は必ずしも十分ではなかった。とりわけ材質モデル同定の対象範囲から外れている場合には、精度の悪化が著しかった。また、材質モデルを構成する多数に亘るモデル式の個々の精度は良好であっても、それらの誤差が積み重ねられるため、トータルの精度を良好に保つことは困難であった。   In the control method based on the material model, the prediction accuracy of the material model is important in order to make the material of the product coincide with the target value. However, the relationship between the heating conditions and the material of the product is extremely complicated, and the prediction accuracy is not always sufficient. In particular, the deterioration of accuracy was remarkable when it was out of the target range of material model identification. In addition, even if the accuracy of individual model formulas constituting the material model is good, since errors are accumulated, it is difficult to keep the total accuracy good.

この発明は、上述のような課題を解決するためになされたもので、温度設定による温度制御はそのまま備えるものの、また材質モデルの予測精度が十分に良好で無い場合にも、製品の品質を向上できる鋼板製造ラインの加熱制御方法及びその装置を提供することを目的としている。   The present invention has been made to solve the above-described problems. Although the temperature control by the temperature setting is provided as it is, the quality of the product is improved even when the prediction accuracy of the material model is not sufficiently good. It aims at providing the heating control method and apparatus of a steel plate production line which can be performed.

この発明における鋼板製造ラインの加熱制御方法は、鋼板を圧延、鍛造若しくは矯正加工する処理と鋼板を加熱する加熱処理により、所望の鋼板製品を製造する鋼板製造ラインにおいて、鋼板の加熱処理として、鋼板幅方向全体に渡って加熱するソレノイド式誘導加熱装置と、鋼板材質（粒径）を測定する材質センサを配置して、材質センサにより鋼板材料の材質を測定して、その測定値に基づいて加熱条件を制御して、鋼板を加熱することを特徴とするものである。   In the steel sheet production line for producing a desired steel sheet product by the process of rolling, forging or straightening the steel sheet and the heat treatment for heating the steel sheet, the heating control method for the steel sheet production line in the present invention is as follows. A solenoid-type induction heating device that heats the entire width direction and a material sensor that measures the steel plate material (particle size) are arranged. The material sensor measures the material of the steel plate material, and heating is performed based on the measured value. The steel sheet is heated by controlling the conditions.

また、鋼板の加熱処理として、鋼板幅方向全体に渡って加熱するソレノイド式誘導加熱装置と、鋼板材質（粒径）を測定する材質センサを配置して、材質センサにより鋼板材料の材質を測定して、計算機により、その材質センサより下流の任意位置に設けられた材質管理ポイントにおける材質が目標値に一致するように計算された値を、材質センサより下流に配置される誘導加熱装置への加熱条件の修正値として制御して、鋼板を加熱することを特徴とするものである。   In addition, as a heat treatment of the steel plate, a solenoid type induction heating device that heats the entire length of the steel plate and a material sensor that measures the steel plate material (particle size) are arranged, and the material sensor measures the material of the steel plate material. The value calculated by the computer so that the material at the material control point provided at an arbitrary position downstream of the material sensor matches the target value is heated to the induction heating device disposed downstream of the material sensor. The steel sheet is heated by being controlled as a correction value of the condition.

また、この発明における鋼板製造ラインの加熱制御装置においては、鋼板材料を加熱するソレノイド式誘導加熱装置と、鋼材の材質（粒径）を測定する材料センサと、所望の寸法形状の鋼板製品を製造する鋼板製造ラインに接続され、上位計算機から与えられる鋼板材料の寸法形状、製品の目標寸法形状及び鋼板材料の組成等の情報に基づいて、誘導加熱装置の設定値を計算し出力する設定計算手段及び材質センサからの測定値による修正計算手段の機能を持つ計算機と、計算機から与えられた加熱条件と修正値とに基づいて誘導加熱装置を制御する誘導加熱装置用制御装置とを備えたものである。   In the heating control device for a steel plate production line according to the present invention, a solenoid induction heating device for heating the steel plate material, a material sensor for measuring the material (particle size) of the steel material, and a steel plate product having a desired size and shape are manufactured. Setting calculation means for calculating and outputting the setting value of the induction heating device based on the information such as the dimensional shape of the steel plate material, the target dimensional shape of the product and the composition of the steel plate material, which is connected to the steel plate production line And a computer having a function of a correction calculation means based on a measured value from a material sensor, and a control device for an induction heating device that controls the induction heating device based on a heating condition and a correction value given from the computer. is there.

この発明によれば、温度制御のみならず、材質（粒径）を誘導加熱装置の加熱条件として加熱制御を行うことが可能となる。これにより、材質を材質センサの測定位置での目標値に一致するように加熱制御して、材質を一定に保つように制御を行うことが可能となる。   According to the present invention, not only temperature control but also heating control can be performed using the material (particle diameter) as the heating condition of the induction heating device. This makes it possible to control the heating so that the material matches the target value at the measurement position of the material sensor so as to keep the material constant.

図１はこの発明の実施例１における鋼板製造ラインの加熱制御方法及びその装置の基本構成を示す構成図である。FIG. 1 is a configuration diagram showing the basic configuration of a heating control method and apparatus for a steel sheet production line according to Embodiment 1 of the present invention. 図２はこの発明の実施例１における鋼板製造ラインの加熱制御方法及びその装置の具体的構成を示す構成図である。FIG. 2 is a block diagram showing a specific configuration of a heating control method and apparatus for a steel sheet production line according to Embodiment 1 of the present invention. 図３はこの発明の前提となる従来の鋼板製造ラインの加熱制御方法及びその装置を示す構成図である。FIG. 3 is a block diagram showing a conventional heating control method and apparatus for a steel sheet production line which is a premise of the present invention.

符号の説明Explanation of symbols

１ ソレノイド式誘導加熱装置
２ 誘導加熱装置用制御装置
３ 計算機
４ 上位計算機
５ 入側材質センサ
６ 出側材質センサ
７ 入側温度計
８ 出側温度計
９ 鋼板
１０ 圧延機DESCRIPTION OF SYMBOLS 1 Solenoid induction heating apparatus 2 Control apparatus for induction heating apparatuses 3 Computer 4 Host computer 5 Incoming material sensor 6 Outlet material sensor 7 Incoming thermometer 8 Outlet thermometer 9 Steel plate 10 Rolling mill

この発明を実施するための最良の形態について図面を参照して具体的に説明する。この実施例では鋼板材料の圧延ラインを挙げるが、鋼板材料に対し、加熱工程を少なくとも１回実施して、所望の製品を製造する鍛造または矯正等の製造ラインについても同様に、この発明を適用することが可能である。   The best mode for carrying out the present invention will be specifically described with reference to the drawings. In this embodiment, a rolling line for steel plate material is given, but the present invention is similarly applied to a production line for forging or straightening for producing a desired product by performing a heating process on the steel plate material at least once. Is possible.

図３は、この発明の前提となる従来の鋼板製造ラインの加熱制御方法及びその装置を示す構成図である。図３で示すように、鋼板９は、ソレノイド式誘導加熱装置１で加熱された後、圧延機１０により加工され所望の製品となる。なお、ソレノイド式誘導加熱装置１は、複数あってもよい。ソレノイド式誘導加熱装置１はインバータを電源装置として持っている。このインバータへの加熱電力基準出力とその制御を行う装置として、加熱電力制御手段と加熱電力修正手段としての機能を持つ誘導加熱装置用制御装置２を設ける。また、製品寸法、材質、温度条件等から設定値を計算し誘導加熱装置用制御装置２に電力設定値を出力する設定計算手段としての機能及びソレノイド式誘導加熱装置１の入側温度計７または出側温度計８からの測定値による修正計算手段としての機能を持つ計算機３がある。計算機３は電力設定値を決定するために必要な製品寸法などの情報を上位計算機４から与えられる。   FIG. 3 is a block diagram showing a heating control method and apparatus for a conventional steel plate production line which is a premise of the present invention. As shown in FIG. 3, the steel plate 9 is heated by the solenoid induction heating device 1 and then processed by the rolling mill 10 to become a desired product. A plurality of solenoid induction heating devices 1 may be provided. The solenoid induction heating device 1 has an inverter as a power supply device. As a heating power reference output to the inverter and a device for controlling it, an induction heating device control device 2 having functions as a heating power control means and a heating power correction means is provided. Further, a function as a setting calculation means for calculating a set value from the product dimensions, material, temperature condition, etc. and outputting the power set value to the induction heating device control device 2 and an inlet side thermometer 7 of the solenoid induction heating device 1 or There is a computer 3 having a function as a correction calculation means based on a measured value from the delivery side thermometer 8. The computer 3 is provided with information such as product dimensions necessary for determining the power setting value from the host computer 4.

このような装置において、誘導加熱装置用制御装置２による加熱制御は、計算機３により基本となる加熱設定モデル計算と、入側温度計７もしくは出側温度計８からの温度測定値により修正を加えたものを電力設定値の基となる温度設定値として定め、その電力設定値に基づき、誘導加熱装置用制御装置２がソレノイド式誘導加熱装置１の加熱電力制御を行うことが一般的であった。   In such an apparatus, the heating control by the induction heating apparatus controller 2 is modified by the basic heating setting model calculation by the computer 3 and the temperature measurement value from the inlet side thermometer 7 or the outlet side thermometer 8. In general, the induction heating device control device 2 controls the heating power of the solenoid induction heating device 1 based on the power setting value. .

図１は、この発明の実施例１における鋼板製造ラインの加熱制御方法及びその装置の基本構成を示す構成図である。
ソレノイド式誘導加熱装置１、誘導加熱装置制御用制御装置２、計算機３、上位計算機４、入側温度計７、出側温度計８の作用は、この発明の前提となる従来のものと同様である。
鋼板製造ライン内のソレノイド式誘導加熱装置１の上流側の任意の位置に入側材質センサ５を設置する。また、ライン内のソレノイド式誘導加熱装置１の下流側の任意の位置に出側材質センサ６を設置する。これらの材質センサ５、６は、上流側の入側材料、下流側の出側材料の材質（粒径）を検出するためのものであるが、両方もしくはいずれか一方に設置しても良い。この材質センサ５、６は、耐久性等の観点から非接触、非破壊のものが望ましく、透磁率などの材質を直接測定するものの他、電気抵抗、超音波の伝播特性、放射線の散乱特性など材質と強い相関を示す物理量を検出し、結晶粒径、成形性などの材質に換算することで間接的に測定するものを用いることが出来る。このような材質センサ５、６は様々なものがあり、例えば、日本特開昭５７−５７２５５号には、材料内に打ち込んだ超音波の強度変化又は伝播速度の検出値に基づいて材料の結晶粒径又は集合組織を測定する方法が開示されている。なお、超音波の送受信には近年開発されたレーザ超音波装置、又は電磁超音波装置などを用いることができ、例えば、日本特開２００１−２５５３０６号には、レーザ超音波装置の一例が開示されている。レーザ超音波装置は材料表面から材質センサまでの距離を長く取ることが出来る特徴があり、とりわけ熱間測定、及び、オンライン測定を行う必要がある場合には利用価値が高い。また、日本特開昭５６−８２４４３号には、磁束検出器で検出される磁束強度から鋼材の変態量を測定する装置が開示されている。FIG. 1 is a configuration diagram showing a basic configuration of a heating control method and apparatus for a steel sheet production line according to Embodiment 1 of the present invention.
The operations of the solenoid induction heating device 1, the control device 2 for controlling the induction heating device, the computer 3, the host computer 4, the entry side thermometer 7, and the exit side thermometer 8 are the same as those of the conventional one that is the premise of the present invention. is there.
An entry-side material sensor 5 is installed at an arbitrary position upstream of the solenoid induction heating device 1 in the steel plate production line. Further, the outlet material sensor 6 is installed at an arbitrary position downstream of the solenoid induction heating device 1 in the line. These material sensors 5 and 6 are for detecting the material (particle diameter) of the upstream inlet material and the downstream outlet material, but may be installed in both or either one. The material sensors 5 and 6 are preferably non-contact and non-destructive from the viewpoint of durability and the like, in addition to those that directly measure materials such as magnetic permeability, electrical resistance, ultrasonic wave propagation characteristics, radiation scattering characteristics, etc. It is possible to use one that is indirectly measured by detecting a physical quantity that shows a strong correlation with the material and converting it to a material such as crystal grain size and moldability. There are various types of such material sensors 5 and 6. For example, Japanese Patent Application Laid-Open No. 57-57255 discloses a crystal of a material based on a detected value of intensity change or propagation velocity of ultrasonic waves injected into the material. A method for measuring particle size or texture is disclosed. Note that recently-developed laser ultrasonic devices or electromagnetic ultrasonic devices can be used for transmitting and receiving ultrasonic waves. For example, Japanese Patent Application Laid-Open No. 2001-255306 discloses an example of a laser ultrasonic device. ing. The laser ultrasonic apparatus has a feature that it can take a long distance from the material surface to the material sensor, and has high utility value particularly when it is necessary to perform hot measurement and online measurement. Japanese Patent Application Laid-Open No. 56-82443 discloses an apparatus for measuring the transformation amount of a steel material from the magnetic flux intensity detected by a magnetic flux detector.

上位計算機４から計算機３に対しては、鋼素材の寸法形状、製品の目標寸法形状、金属素材の組成（合金成分の含有率）等の目標値に加え、材質センサ５、６による材質測定位置で達成すべき材質の目標値が与えられる。この材質とは、例えば、引張り強さ、耐力、靱性、及び、延性などの機械的特性、透磁率などの電磁気的特性、或いは、それらと強い相関を持つ結晶粒径、結晶方位の配向性、各種の結晶組織の存在比率のうちのいくつかである。   For the host computer 4 to the computer 3, in addition to the target values such as the dimensional shape of the steel material, the target dimensional shape of the product, the composition of the metal material (content ratio of the alloy component), the material measurement position by the material sensors 5 and 6 Gives the target value of the material to be achieved. This material is, for example, mechanical properties such as tensile strength, proof stress, toughness, and ductility, electromagnetic properties such as magnetic permeability, or crystal grain size having a strong correlation with them, orientation of crystal orientation, Some of the abundance ratios of various crystal structures.

図２は、この発明の実施例１における鋼板製造ラインの加熱制御方法及びその装置の具体的構成を示す構成図である。
ソレノイド式誘導加熱装置１、誘導加熱装置用制御装置２、計算機３、上位計算機４、入側温度計７（図示省略）、出側温度計８（図示省略）の作用は、この発明の前提となる従来のものと同様である。当鋼板材料の材質モデル計算した当該測定位置の材質の測定値と比較し、その比較結果に基づいて求められた修正値を誘導加熱装置用制御装置２にて修正を加えたものである。これは例えば次式により行う。FIG. 2 is a configuration diagram showing a specific configuration of a heating control method and apparatus for a steel sheet production line according to Embodiment 1 of the present invention.
The operations of the solenoid induction heating device 1, the induction heating device control device 2, the computer 3, the host computer 4, the inlet side thermometer 7 (not shown), and the outlet side thermometer 8 (not shown) are the premise of the present invention. It is the same as the conventional one. In comparison with the measured value of the material at the measurement position calculated by the material model of the steel sheet material, the correction value obtained based on the comparison result is corrected by the control device 2 for induction heating apparatus. This is performed, for example, by the following equation.

Figure 2008090597
ここで
Figure 2008090597
である。なお、ゲインK１は誘導加熱装置の応答性を考慮して決める。また、重み係数Ｗ１は、操業の安定性を勘案して決める。影響係数(δX/δT)は次の材質モデルを数値微分することにより得られる。
Figure 2008090597
here
Figure 2008090597
It is. The gain K1 is determined in consideration of the response of the induction heating device. The weighting factor W1 is determined in consideration of operational stability. The influence coefficient (ΔX / ΔT) is obtained by numerically differentiating the following material model.

Figure 2008090597
ここで
Figure 2008090597
である。この影響係数の計算は実際の操業条件（材料温度など）に基づき使い、オンラインで計算することが望ましいが、ゲインＫ１を低めにすれば、標準的な操業条件に基づき予めオフラインで計算しておいた値を用いることも可能である。
Figure 2008090597
here
Figure 2008090597
It is. This influence coefficient is calculated based on the actual operating conditions (material temperature, etc.) and is preferably calculated online. However, if the gain K1 is lowered, it is calculated offline in advance based on the standard operating conditions. It is also possible to use a new value.

電力制御値は、鋼材の寸法、特性（比重、比熱）および搬送速度の値を用いて処理量と昇温熱量から必要昇温量に対する電力値を電力制御モデルとして定める。例えば次式により行う。

Figure 2008090597
ここで、
Figure 2008090597
である。計算機３により計算された上式を鋼板の昇温に必要な基準電力値として誘導加熱装置用制御装置２に与えるものとする。誘導加熱装置の電源装置であるインバータには、誘導加熱装置用制御装置２により、上記の電力制御値(PSET)に誘導加熱装置の加熱効率を加味した値を出力している。For the power control value, the power value for the required temperature rise is determined as a power control model from the processing amount and the temperature rise by using the values of the dimensions, characteristics (specific gravity, specific heat) and conveying speed of the steel material. For example, the following equation is used.
Figure 2008090597
here,
Figure 2008090597
It is. The above equation calculated by the computer 3 is given to the induction heating device controller 2 as a reference power value necessary for heating the steel plate. A value obtained by adding the heating efficiency of the induction heating device to the power control value (P SET ) is output from the induction heating device control device 2 to the inverter which is a power supply device of the induction heating device.

電力制御の修正計算は上記式３と同等式を用いて、材質センサ５、６の測定値からの加熱温度の修正計算で得られた加熱温度設定値(TSET)を代入する事より行う。例えば次式により行う。The power control correction calculation is performed by substituting the heating temperature setting value (T SET ) obtained by the heating temperature correction calculation from the measured values of the material sensors 5 and 6, using the same formula as the above formula 3. For example, the following equation is used.

Figure 2008090597
ここで、
Figure 2008090597
である。ここで補正後の電力制御値(PSET1)を修正値として誘導加熱用制御装置２にて修正を加えるものである。
Figure 2008090597
here,
Figure 2008090597
It is. Here, the corrected electric power control value (P SET1 ) is used as a correction value to be corrected by the induction heating control device 2.

なお、誘導加熱装置１の電源に使用するインバータは半導体素子回路により誘導加熱コイルに供給する電力を任意に且つ素早く調整することが出来るため、この場合には上記式１で示されるゲインK１を高める。誘導加熱装置用制御装置２は、計算機から出力される電力制御値に、当鋼板材料の材質モデル計算した当該測定位置の材質の測定値と比較し、その比較結果に基づいて求められた修正値を加えることにより鋼板長手方向全体に渡り、より精度の高いダイナミックな制御が可能となる。より高品質の製品を製造できる。   In addition, since the inverter used for the power supply of the induction heating apparatus 1 can arbitrarily and quickly adjust the power supplied to the induction heating coil by the semiconductor element circuit, in this case, the gain K1 expressed by the above equation 1 is increased. . The induction heating device control device 2 compares the power control value output from the computer with the measured value of the material at the measurement position calculated by the material model of the steel sheet material, and the corrected value obtained based on the comparison result By adding, dynamic control with higher accuracy is possible over the entire length of the steel sheet. Higher quality products can be manufactured.

以上のように、この発明によれば、従来の温度制御のみならず、鋼板の材質（粒径）を測定することにより、より高品質な鋼材の製造が可能となる。また、誘導加熱装置の加熱制御を司る誘導加熱装置用制御装置により、計算機から与えられた電力設定値および修正値にて、よりダイナミックな制御を行うことが可能となる。   As described above, according to the present invention, not only the conventional temperature control but also the measurement of the material (particle diameter) of the steel sheet makes it possible to manufacture a higher quality steel material. In addition, the induction heating device control device that controls the heating of the induction heating device enables more dynamic control with the power set value and the correction value given from the computer.

この発明の、鋼材を圧延、鍛造もしくは矯正ラインの加熱制御方法およびその装置は、特に誘導加熱装置とレーザ超音波による結晶粒径センサを用いた鉄鋼厚板ラインや熱間圧延ラインの加熱制御に適用することができる。   The heating control method and apparatus for rolling, forging or straightening a steel material according to the present invention is particularly suitable for heating control of a steel thick plate line or a hot rolling line using an induction heating device and a crystal grain size sensor using laser ultrasonic waves. Can be applied.

この発明における鋼板製造ラインの加熱制御方法は、鋼板を圧延、鍛造若しくは矯正加工する処理と鋼板を加熱する加熱処理により、所望の鋼板製品を製造する鋼板製造ラインであって、鋼板の加熱処理として、鋼板幅方向全体に渡って加熱するインバータを持つソレノイド式誘導加熱装置と、インバータへの加熱電力基準出力とその制御を行う誘導加熱装置用制御装置とを備え、計算機により基本となる加熱設定モデル計算と、入側温度計もしくは出側温度計からの温度測定値により修正を加えたものを電力設定値とし、その電力設定値に基づき、誘導加熱装置用制御装置がソレノイド式誘導加熱装置の加熱電力制御を行う鋼板製造ラインの加熱制御方法において、鋼板材質（粒経）を測定する材質センサを配置して、材質センサにより鋼板材料の材質を測定して、その測定値に基づいてソレノイド式誘導加熱装置のインバータへの加熱条件を制御して、鋼板を加熱することを特徴とするものである。 Heating control method of the steel plate manufacturing line in this invention, rolling the steel sheet, by heat treatment for heating the processing and steel forging or straightening, a steel plate production line to produce the desired steel sheet products, as the heat treatment of the steel sheet A heating setting model based on a computer, comprising a solenoid induction heating device having an inverter that heats the entire width direction of the steel sheet, and a heating power reference output to the inverter and a control device for the induction heating device that controls the inverter. The power set value is corrected by the calculation and the temperature measured from the inlet side thermometer or outlet side thermometer, and the controller for the induction heating device uses the power set value to heat the solenoid induction heating device. in the heating control method of a steel plate manufacturing line for performing power control, place the material sensor that measures the steel material (Tsubukei), steel with the material sensor The material of the material was measured, by controlling the heating conditions of the inverter solenoid type induction heating device based on the measurement value, and is characterized in heating the steel sheet.

また、鋼板の加熱処理として、鋼板幅方向全体に渡って加熱するインバータを持つソレノイド式誘導加熱装置と、インバータへの加熱電力基準出力とその制御を行う誘導加熱装置用制御装置とを備え、計算機により基本となる加熱設定モデル計算と、入側温度計もしくは出側温度計からの温度測定値により修正を加えたものを電力設定値とし、その電力設定値に基づき、誘導加熱装置用制御装置がソレノイド式誘導加熱装置の加熱電力制御を行う鋼板製造ラインの加熱制御方法において、鋼板材質（粒経）を測定する材質センサを配置して、材質センサにより鋼板材料の材質を測定して、計算機により、その材質センサより下流の任意位置に設けられた材質管理ポイントにおける材質が目標値に一致するように計算された値を、材質センサより下流に配置されるソレノイド式誘導加熱装置のインバータへの加熱条件の修正値として制御して、鋼板を加熱することを特徴とするものである。 In addition, as a heat treatment of the steel plate , a solenoid induction heating device having an inverter that heats the entire width of the steel plate , a heating power reference output to the inverter, and a control device for the induction heating device that controls the computer are provided. Based on the heating setting model calculation and the temperature setting value corrected from the input side thermometer or the outlet side thermometer, the power setting value is set. Based on the power setting value, the controller for the induction heating device In the heating control method of the steel plate production line that controls the heating power of the solenoid induction heating device, a material sensor for measuring the steel plate material (grain size) is arranged, the material of the steel plate material is measured by the material sensor, and the computer is used. The value calculated so that the material at the material control point provided at an arbitrary position downstream of the material sensor matches the target value is obtained from the material sensor. Controlled as a correction value for the heating conditions to the inverter solenoid type induction heating device arranged downstream, and is characterized in heating the steel sheet.

また、この発明における鋼板製造ラインの加熱制御装置においては、鋼板材料を加熱するインバータを持つソレノイド式誘導加熱装置と、鋼材の材質（粒経）を測定し、その測定値に基づいてソレノイド式誘導加熱装置のインバータへの加熱条件を制御する材質センサと、所望の寸法形状の鋼板製品を製造する鋼板製造ラインに接続され、上位計算機から与えられる鋼板材料の寸法形状、製品の目標寸法形状及び鋼板材料の組成等の情報に基づいて、誘導加熱装置の設定値を計算し出力する設定計算手段及び材質センサからの測定値による修正計算手段の機能を持つ計算機と、計算機から与えられた加熱条件と修正値とに基づいてソレノイド式誘導加熱装置のインバータを制御する誘導加熱装置用制御装置とを備えたものである。
In the heating control device for a steel sheet production line according to the present invention , a solenoid induction heating apparatus having an inverter for heating the steel sheet material, and the material (grain size) of the steel material are measured , and the solenoid induction is based on the measured value. A material sensor that controls the heating conditions for the inverter of the heating device, and a steel plate material line that is connected to a steel plate production line that manufactures a steel plate product of a desired size and shape. Based on information such as the composition of the material, a calculator having a function of setting calculation means for calculating and outputting the setting value of the induction heating device and a correction calculation means by a measurement value from the material sensor, and heating conditions given from the computer And an induction heating device controller that controls the inverter of the solenoid induction heating device based on the correction value.

Claims (3)

鋼板を圧延、鍛造若しくは矯正加工する処理と鋼板を加熱する加熱処理により、所望の鋼板製品を製造する鋼板製造ラインにおいて、
前記鋼板の加熱処理として、鋼板幅方向全体に渡って加熱するソレノイド式誘導加熱装置と、鋼板材質を測定する材質センサを配置して、前記材質センサにより鋼板材料の材質を測定して、その測定値に基づいて加熱条件を制御して、前記鋼板を加熱することを特徴とする鋼板製造ラインの加熱制御方法。In the steel sheet production line for producing a desired steel sheet product by the process of rolling, forging or straightening the steel sheet and the heat treatment for heating the steel sheet,
As the heat treatment of the steel plate, a solenoid type induction heating device that heats the entire steel plate width direction and a material sensor that measures the steel plate material are arranged, and the material sensor measures the material of the steel plate material, and the measurement A heating control method for a steel sheet production line, wherein the steel sheet is heated by controlling heating conditions based on a value. 鋼板を圧延、鍛造若しくは矯正加工する処理と鋼板を加熱する加熱処理により、所望の鋼板製品を製造する鋼板製造ラインにおいて、
前記鋼板の加熱処理として、鋼板幅方向全体に渡って加熱するソレノイド式誘導加熱装置と、鋼板材質を測定する材質センサを配置して、前記材質センサにより鋼板材料の材質を測定して、計算機により、その材質センサより下流の任意位置に設けられた材質管理ポイントにおける材質が目標値に一致するように計算された値を、前記材質センサより下流に配置される前記誘導加熱装置への加熱条件の修正値として制御して、前記鋼板を加熱することを特徴とする鋼板製造ラインの加熱制御方法。In the steel sheet production line for producing a desired steel sheet product by the process of rolling, forging or straightening the steel sheet and the heat treatment for heating the steel sheet,
As the heat treatment of the steel plate, a solenoid type induction heating device that heats the entire steel plate width direction and a material sensor that measures the steel plate material are arranged, and the material sensor measures the material of the steel plate material, The value calculated so that the material at the material management point provided at an arbitrary position downstream from the material sensor matches the target value is the heating condition for the induction heating device disposed downstream from the material sensor. A heating control method for a steel sheet production line, wherein the steel sheet is heated by being controlled as a correction value. 鋼板材料を加熱するソレノイド式誘導加熱装置と、
鋼材の材質を測定する材料センサと、
所望の寸法形状の鋼板製品を製造する鋼板製造ラインに接続され、上位計算機から与えられる鋼板材料の寸法形状、製品の目標寸法形状及び鋼板材料の組成等の情報に基づいて、前記誘導加熱装置の設定値を計算し出力する設定計算手段及び前記材質センサからの測定値による修正計算手段の機能を持つ計算機と、
前記計算機から与えられた加熱条件と修正値とに基づいて前記誘導加熱装置を制御する誘導加熱装置用制御装置と、
を備えたことを特徴とする鋼板製造ラインの加熱制御装置。A solenoid induction heating device for heating the steel plate material;
A material sensor for measuring the material of the steel material;
Connected to a steel plate production line for manufacturing a steel product having a desired size and shape, and based on information such as the size and shape of the steel plate material, the target size and shape of the product and the composition of the steel plate material given from the host computer, the induction heating device A calculator having a function of a setting calculation means for calculating and outputting a setting value and a correction calculating means by a measurement value from the material sensor;
A control device for an induction heating device that controls the induction heating device based on a heating condition and a correction value given from the computer;
A heating control device for a steel sheet production line.
JP2007544677A 2007-01-22 2007-01-22 Heating control method and apparatus for steel plate production line Pending JPWO2008090597A1 (en)

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