WO2010083726A1 - Shape control method of hot rolled strip or slab and device thereof - Google Patents

Shape control method of hot rolled strip or slab and device thereof Download PDF

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Publication number
WO2010083726A1
WO2010083726A1 PCT/CN2010/000088 CN2010000088W WO2010083726A1 WO 2010083726 A1 WO2010083726 A1 WO 2010083726A1 CN 2010000088 W CN2010000088 W CN 2010000088W WO 2010083726 A1 WO2010083726 A1 WO 2010083726A1
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Prior art keywords
rolling
shape
induction heating
hot
rolled
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PCT/CN2010/000088
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French (fr)
Chinese (zh)
Inventor
李宏图
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中冶赛迪工程技术股份有限公司
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Publication of WO2010083726A1 publication Critical patent/WO2010083726A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • 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
    • B21B45/02—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 for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates

Definitions

  • the present invention relates to a hot rolling apparatus and a hot rolling method, and relates to a method and apparatus for hot rolled strip and steel sheet control, and more particularly to a method and apparatus for hot rolled strip and steel sheet shape and precision control.
  • CVC Continuous Variable Crown
  • SMS Short Variable Crown
  • the change, the positive and negative convexity of the work roll gap can be obtained by the axial movement of the work roll, thereby realizing the control of the strip crown.
  • the convexity control ability and the axial movement amount of the work roll have a linear relationship. Since its development, it has been used in more than 250 racks.
  • the PC (Pair Cross) paired cross mill was developed by Mitsubishi Corporation of Japan. As shown in Figure 5, it changes the roll gap by the intersection of the upper and lower rolls.
  • the PC rolling mill is characterized in that the convexity control range is proportional to the square of the intersection angle ⁇ , and the intersection angle is 0 to 1.5° (the cross angle is controlled within 1° in actual use).
  • PC mills are available in single crossover and double crossover.
  • the crossover movement of a single cross is twice that of a double crossover. Therefore, in the wide strip steel rolling mill, the double crossover method is generally adopted, and the PC mill adopts ORG (On-line Roll Grinding) in the rear frame or The work roll axial movement (WRS) eliminates roll wear and achieves free rolling.
  • WRB/WRS Work Roll Bending I Work Roll Shifting
  • This method is a plate-shaped control method with a wide range of applications and a long history.
  • Hitachi which is called HCW
  • CLECIM in France
  • WRB/WRS uses work roll bending rolls (WRB) to control crown and flatness
  • WRS work roll axial movement
  • the ability to control the crown depends on the force of the bending roller.
  • Bar Heater is a technology invented by Toshiba Corporation of Japan (TOSHIBA) to improve the temperature reduction of the rolled piece along the length.
  • the principle is that the intermediate billet is heated by electromagnetic induction, and the tail of the rolled piece can be rolled.
  • the maximum temperature increase of 70 ° C, the device has many sets of application examples.
  • the existing shape control technology is based on changing the shape of the roll gap between the upper and lower work rolls.
  • more shape control methods are used, such as WRB/WRS, CVC, and PC. These techniques require the addition of bending equipment, work roll rolling equipment, roll crossover equipment, or grinding of the roll body into a curve on the mill. Equipment costs have increased a lot. Since the rolls need to be ground into a specific curve or the like, the roll consumption is increased.
  • the heat preservation cover (reducing the temperature drop of the rolling piece) and the intermediate billet heating device (compensating the temperature of the tail part of the rolling stock) are currently used.
  • hot coil boxes exchange of head and tail of the rolling stock
  • coiling furnace insulation rolling
  • speed-up rolling to reduce and overcome the adverse effects of rolling temperature reduction with time.
  • the commonality is to keep the parts warm and heated, and the equipment investment is large.
  • the invention is to change the temperature distribution in the width direction of the rolled piece. Adjusting the deformability of the metal to achieve the desired shape control.
  • the following two methods can be combined or used separately. (1) The precise spray of the aerosol cooling medium to the rolling stock changes the temperature distribution in the width direction of the rolling stock, (2) The electric induction heating device is used to selectively heat the rolled piece in the width direction. The cooling parameters and the electric induction heating parameters injected along the width of the rolling stock are adjusted according to the setting and feedback information to realize the open-loop or closed-loop shape control.
  • the electric induction heating device Arranging the aerosol cooling device before and after the reversing rolling mill, arranged in the tandem tropical steel rolling piece between the front of the rolling mill and the rolling mill frame, and simultaneously spraying the gas mist to the upper and lower surfaces of the rolling stock; the electric induction heating device Arranged in front of the mill or between the mill stands.
  • the electric induction heating device can be controlled and controlled in sections along the width direction of the rolling stock.
  • the invention is completely different from the existing shape control technology in principle, and has a simple structure and strong applicability. It can be used for the shape control of the newly built hot rolling mill or for the shape control of the existing rolling mill. It is also suitable for hot rolled strip and steel sheet rolling of non-ferrous metals. Has a wide range of promotional value.
  • the invention adopts the method of hot rolling strip steel and steel plate cooling and electric induction heating of the gas mist, and can achieve the following objectives more economically and effectively: First, changing the temperature distribution of the cross section of the rolled piece to correct the hot rolling Strip and steel plate crown, the purpose of the flatness of the plate shape defect; Second, through the cooling control of the length of the rolling piece, reduce or compensate the temperature unevenness of the rolled piece in the longitudinal direction to the thickness accuracy of the strip and the steel plate Influence, improve the thickness accuracy of strip and steel plate.
  • the selective stepwise heating is performed to change the temperature distribution in the width direction of the rolled piece.
  • the cooling medium used is cooling water atomized by air, that is, an aerosol cooling medium.
  • the proper amount of aerosol contact with high temperature will take away heat and evaporate into the air. It will not flow to the adjacent area like cooling water, which can achieve accurate partition cooling control of the rolling stock.
  • the choice of cooling method is the essence of the present invention One of the prime.
  • the electric induction heating device can heat and heat the rolled product in sections along the width direction of the rolling stock, which is another element of the present invention.
  • the cooling device of the present invention is disposed before and after the reversible steel plate rolling mill, and is disposed between the front of the rolling mill and the rolling stand in the tandem hot strip mill.
  • the electric induction heating device is arranged between the rolling mill front or the rolling mill stand. .
  • Closed-loop control can also be realized by the shape meter and thickness gauge matched by the rolling mill.
  • the arrangement of the spray beams of the aerosol-cooling device may be arranged in parallel with the transport roller path of the rolling stock, or may be arranged in a vertical roller path.
  • the invention may be used alone or in combination with other shape control devices.
  • the aerosol cooling device is mainly composed of a control valve station, a cooling header, an intermediate pipe and an automatic control system, wherein the control valve station, the cooling header and the intermediate pipeline station comprise two types of pipelines: a gas pipeline and a water pipeline.
  • the electric induction heating device is composed of an electric induction heating portion and a control portion.
  • Figure 1 to 3 are schematic diagrams of strip-shaped defects
  • Figure 4 is a schematic diagram of CVC shape control
  • Figure 5 is a schematic diagram of PC shape control
  • Figure 6 is a schematic diagram of the installation position of the aerosol cooling device and the electric induction heating device (taking the tandem rack as an example)
  • Figure 7 is a schematic diagram showing the relationship between the rolling stock and the aerosol nozzle.
  • Figure 8 is a schematic diagram showing the relationship between the rolled piece and the electric induction heating device.
  • FIG. 9 is the control logic diagram
  • the component 1 is an electric induction heating device
  • the component 2 is an aerosol cooling device
  • the component 3 is a rolling mill
  • the component 4 is a measuring instrument
  • the component 5 is a nozzle
  • the component 6 is a steel plate or a strip steel
  • the component 7 is an electric induction heating device.
  • the aerosol cooling device 1 is arranged before and after the reversible steel plate rolling mill 2, and is disposed between the front of the rolling mill 2 and the rolling mill 2 frame in the tandem hot strip mill 2; the aerosol cooling device 1 is mainly controlled by a valve station, a cooling set
  • the pipe, the intermediate pipe and the automatic control system are composed, wherein the control valve station, the cooling header and the intermediate pipeline station comprise two lines of a gas path and a water path.
  • the aerosol cooling device 1 is connected to the measuring instrument 3, and the measuring instrument 3 controls the valve opening degree of the control valve station, and the nozzle 4 sprays the cooling water atomized by the air, that is, the aerosol cooling medium.
  • the invention calculates the cooling effect of the strip/steel plate by the aerosol cooling model, and completes the setting of the cooling device.
  • the crown is obtained; the temperature correction requirement of the rolling stock and the set value of the aerosol cooling are obtained from the deformation resistance and the temperature model; the parameters such as the amount of the aerosol cooling water, the air pressure and the header are adjusted; finally, the temperature meter, the thickness meter, and the straightness meter are obtained.
  • the measured value of the convexity meter is obtained.
  • the rolling will continue. Otherwise, the parameters such as the amount of aerosol cooling water, air pressure and header will be adjusted until the measured value and the set value are consistent.
  • the cooling parameters injected along the width of the rolling stock are adjusted according to the setting and feedback information, and the open-loop or closed-loop shape control can be realized.
  • the invention adjusts the deformation ability of the metal by changing the temperature distribution in the width direction of the rolling piece, thereby achieving the ideal shape control, that is, selectively spraying the cooling medium to the rolling piece, changing the temperature distribution in the width direction of the rolling piece;
  • the front part sprays a certain cooling medium, and gradually reduces the cooling amount along the length of the rolling piece to achieve uniform rolling temperature; this function can be selectively used according to the process requirements; it can also pass the shape meter and test of the rolling mill.
  • Thick gauges implement closed loop control.
  • the arrangement of the spray beam of the aerosol-cooling device may be arranged in parallel with the conveying roller path of the rolling stock or may be arranged in a vertical roller path; the invention may be used alone or in combination with other shape control devices.
  • the invention fully satisfies the requirements for the control of the crown, flatness and thickness precision of the hot rolled strip and the steel sheet, and produces a high quality wide steel plate or strip.
  • the invention is completely different from the existing shape control technology in principle, and has a simple structure and strong applicability. It can be used for the shape control of new hot rolling mills or for the shape control of existing rolling mills. Suitable for hot rolled strip and steel sheet rolling of non-ferrous metals. Has a wide range of promotional value.

Abstract

A shape control method of a hot rolled strip or a hot rolled slab is provided, which adjusts the deformability of metal by influencing the temperature distribution over the width of a rolled stock, thus achieving ideal shape control. The following two manners can be used alone or in combination: 1) accurately spraying atomized cooling medium towards the rolled stock as as to change the temperature distribution over the width of the rolled stock, 2) selectively heating the rolled stock in segments over the width of the rolled stock by using electric induction heating elements. The cooling and/or induction heating parameters are adjusted over the width of the rolled stock based on the preset and feedback information in the above mentioned method, thus achieving open-loop or closed-hoop shape control. A shape control device of a hot rolled strip or a hot rolled slab used in the above mentioned method is also provided. Atomized cooling elements (1) are provided on the upstream and/or downstream of a reversing mill, or on the upstream of mill and/or between the stands of a tandem mill. The cooling elements spray atomized medium towards the upper and lower surface of the rolled stock simultaneously, and/or the electric induction heating elements (7) heats the rolled stock in segments. The shape control device of a hot rolled strip or a hot rolled slab has a simple structure, and can be applied widely.

Description

说 明 书 一种热轧带钢及钢板板形控制的方法和设备 技术领域  Description Method and apparatus for hot-rolled strip and steel plate shape control
本发明属于热轧设备及热轧方法，涉及一种用于热轧带钢及钢板控制的 方法和设备，特别涉及一种用于热轧带钢及钢板板形和精度控制的方法和设 备。  The present invention relates to a hot rolling apparatus and a hot rolling method, and relates to a method and apparatus for hot rolled strip and steel sheet control, and more particularly to a method and apparatus for hot rolled strip and steel sheet shape and precision control.
背景技术 Background technique
在热轧带钢轧机和中厚板轧机的轧制过程中，热轧带钢及钢板的横断面 形状在轧制过程中由于轧件温度分布不均匀、轧辊桡曲、磨损等因素将会产 生一定程度的不均匀变形， 见图 1〜3， 造成凸度， 平直度方面的板形缺陷。 由于轧件进入轧辊的前后时间差距，轧件沿长度方向的温度降低是造成带钢 /钢板厚度偏差的主要原因。  In the rolling process of hot strip mill and plate mill, the cross-sectional shape of hot-rolled strip and steel sheet will be generated during the rolling process due to uneven temperature distribution of the rolling stock, roll distortion and wear. A certain degree of uneven deformation, as shown in Figures 1 to 3, causes plate-shaped defects in terms of crown and flatness. Due to the difference in the length of the rolling stock before and after the roll enters the roll, the temperature drop of the rolled piece along the length is the main cause of the strip/steel thickness deviation.
目前典型的技术简述如下：  The current typical technical brief is as follows:
a) CVC板形控制系统：  a) CVC shape control system:
CVC ( Continuous Variable Crown) 是由 SMS公司开发的板形控制系统。 它的原理是工作辊直径连续变化，如图 4所示，上下工作辊配合时其辊缝形 状随工作辊辊身长度变化而成多项式（ = αο+ ιΧ + 2χ2+... ηΧ η)变化， 通过 工作辊轴向移动可以获得工作辊辊缝的正负凸度的变化，从而实现对带钢凸 度的控制。其凸度控制能力和工作辊轴向移动量为线性变化关系。 自开发完 成以来， 已经运用于 250多架机架。 CVC (Continuous Variable Crown) is a shape control system developed by SMS. Its principle is that the diameter of the work roll is continuously changed. As shown in Fig. 4, the shape of the roll gap of the upper and lower work rolls is changed according to the length of the roll body of the work roll to form a polynomial ( = αο+ ιΧ + 2 χ 2 +... ηΧ η The change, the positive and negative convexity of the work roll gap can be obtained by the axial movement of the work roll, thereby realizing the control of the strip crown. The convexity control ability and the axial movement amount of the work roll have a linear relationship. Since its development, it has been used in more than 250 racks.
b) PC板形控制系统：  b) PC shape control system:
PC (Pair Cross) 成对交叉轧机是由日本三菱公司开发完成的。 如图 5 所示， 它通过上下轧辊的交叉来改变辊缝凸度。  The PC (Pair Cross) paired cross mill was developed by Mitsubishi Corporation of Japan. As shown in Figure 5, it changes the roll gap by the intersection of the upper and lower rolls.
PC轧机特点是凸度控制范围与交叉角 θ的平方成正比， 交叉角度为 0〜 1.5° (在实际使用时交叉角控制在 1°之内，）。 PC轧机有单交叉和双交叉两 种方式， 单交叉的交叉移动量是双交叉的两倍。因此在宽带钢轧机中一般选 用双交叉方式， PC轧机在后部机架采用 ORG ( On-line Roll Grinding) 或 者是由工作辊轴向移动 （WRS ) 来消除轧辊磨损， 实现自由轧制。 The PC rolling mill is characterized in that the convexity control range is proportional to the square of the intersection angle θ, and the intersection angle is 0 to 1.5° (the cross angle is controlled within 1° in actual use). PC mills are available in single crossover and double crossover. The crossover movement of a single cross is twice that of a double crossover. Therefore, in the wide strip steel rolling mill, the double crossover method is generally adopted, and the PC mill adopts ORG (On-line Roll Grinding) in the rear frame or The work roll axial movement (WRS) eliminates roll wear and achieves free rolling.
c ) WRB/WRS工作辊弯辊窜辊控制系统  c) WRB/WRS work roll bending roll control system
WRB/WRS (Work Roll Bending I Work Roll Shifting )即工作辊弯辊和工 作辊轴向移动。该方式是一种使用范围很广、历史相当悠久的板形控制方式， 特别是在 PC和 CVC没有投入实际生产实践以前， 东西方开发使用的厂家 都比较多。 比较有名的有日本的日立 （它称之为 HCW)、 法国的 CLECIM, 美国的 UNITED等。 WRB/WRS 采用工作辊弯辊（WRB ) 控制凸度和平直 度， 工作辊轴向移动 （WRS ) 改善工作辊磨损而实现自由轧制。 凸度控制 的能力视弯辊力的大小而定。  WRB/WRS (Work Roll Bending I Work Roll Shifting) is the axial movement of the work roll bending roll and the work roll. This method is a plate-shaped control method with a wide range of applications and a long history. Especially before the PC and CVC are put into practical production practice, there are many manufacturers developing in the East and West. More famous are Hitachi (which is called HCW) in Japan, CLECIM in France, and UNITED in the United States. WRB/WRS uses work roll bending rolls (WRB) to control crown and flatness, and work roll axial movement (WRS) improves work roll wear for free rolling. The ability to control the crown depends on the force of the bending roller.
d) 中间坯加热器 （Bar Heater) 是日本东芝公司 （TOSHIBA) 发明的 用于改善轧件沿长度方向温度降低的技术，其原理是通过电磁感应对中间坯 进行加热， 可以将轧件的尾部温度最大提高 70° C, 该装置已有多套应用实 例。  d) Bar Heater is a technology invented by Toshiba Corporation of Japan (TOSHIBA) to improve the temperature reduction of the rolled piece along the length. The principle is that the intermediate billet is heated by electromagnetic induction, and the tail of the rolled piece can be rolled. The maximum temperature increase of 70 ° C, the device has many sets of application examples.
现有技术存在的问题是：  The problems with the prior art are:
1 ) 现有的板形控制技术无一例外的是以改变上下工作辊间的辊缝形状 为基础的。 目前使用较多的板形控制方式有 WRB/WRS 、 CVC、 PC。 这些 技术需要在轧机上增加弯辊设备， 工作辊窜辊设备， 轧辊交叉设备， 或将轧 辊辊身磨削成曲线等。设备费用增加很多。 由于轧辊需要磨削成特定的曲线 等， 增加了轧辊的消耗。  1) The existing shape control technology is based on changing the shape of the roll gap between the upper and lower work rolls. At present, more shape control methods are used, such as WRB/WRS, CVC, and PC. These techniques require the addition of bending equipment, work roll rolling equipment, roll crossover equipment, or grinding of the roll body into a curve on the mill. Equipment costs have increased a lot. Since the rolls need to be ground into a specific curve or the like, the roll consumption is increased.
2 ) 为了减少或补偿轧件在长度方向温度头高尾低对带钢及钢板的厚度 精度的影响， 目前采用保温罩 （减少轧件温降）， 中间坯加热装置 （对轧件 尾部温度进行补偿）， 热卷箱（将轧件头尾进行交换）， 卷取炉（保温轧制）， 升速轧制来减小和克服轧制温度随时间降低的不利影响。其共性是对轧件保 温和加热， 设备投资较大。  2) In order to reduce or compensate the influence of the high temperature and low tail temperature of the rolled piece on the thickness accuracy of the strip and the steel plate, the heat preservation cover (reducing the temperature drop of the rolling piece) and the intermediate billet heating device (compensating the temperature of the tail part of the rolling stock) are currently used. ), hot coil boxes (exchange of head and tail of the rolling stock), coiling furnace (insulation rolling), speed-up rolling to reduce and overcome the adverse effects of rolling temperature reduction with time. The commonality is to keep the parts warm and heated, and the equipment investment is large.
发明内容 Summary of the invention
本发明的目的是提供一种热轧带钢及钢板板形和精度控制的方法和设 备， 以克服上述技术的不足。本发明是通过改变轧件宽度方向的温度分布来 调节金属的变形能力， 从而达到理想的板形控制， 可将下面的两种方式组合 或单独使用， （1 )向轧件精确的喷射气雾冷却介质改变轧件宽度方向的温度 分布， （2)采用电感应加热装置对轧件在宽度方向上进行选择性的分段加热 升温。沿轧件宽度喷射的冷却参数和电感应加热参数根据设定和反馈信息进 行调整， 实现开环或闭环的板形控制。将气雾冷却装置布置在可逆式轧机的 前后，在串联式热带钢轧件中布置在轧机的前面和轧机机架之间， 同时向轧 件的上、 下表面喷射气雾； 电感应加热装置布置在轧机前或轧机机架之间。 电感应加热装置沿轧件宽度方向可分段进行控轧。本发明在原理上完全不同 于现有的板形控制技术， 结构简单， 适用性强。可以运用于新建的热轧机的 板形控制或者对现有轧机进行板形控制改造，也适用于有色金属的热轧带钢 及钢板轧制。 具有广泛的推广价值。 SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for hot strip and steel sheet shape and precision control to overcome the deficiencies of the above techniques. The invention is to change the temperature distribution in the width direction of the rolled piece. Adjusting the deformability of the metal to achieve the desired shape control. The following two methods can be combined or used separately. (1) The precise spray of the aerosol cooling medium to the rolling stock changes the temperature distribution in the width direction of the rolling stock, (2) The electric induction heating device is used to selectively heat the rolled piece in the width direction. The cooling parameters and the electric induction heating parameters injected along the width of the rolling stock are adjusted according to the setting and feedback information to realize the open-loop or closed-loop shape control. Arranging the aerosol cooling device before and after the reversing rolling mill, arranged in the tandem tropical steel rolling piece between the front of the rolling mill and the rolling mill frame, and simultaneously spraying the gas mist to the upper and lower surfaces of the rolling stock; the electric induction heating device Arranged in front of the mill or between the mill stands. The electric induction heating device can be controlled and controlled in sections along the width direction of the rolling stock. The invention is completely different from the existing shape control technology in principle, and has a simple structure and strong applicability. It can be used for the shape control of the newly built hot rolling mill or for the shape control of the existing rolling mill. It is also suitable for hot rolled strip and steel sheet rolling of non-ferrous metals. Has a wide range of promotional value.
本发明采用这种气雾的热轧带钢及钢板冷却和电感应加热的方式，可以 更经济、 有效地实现下述目标： 第一， 改变轧件的横断面的温度分布， 达到 纠正热轧带钢及钢板凸度， 平直度方面的板形缺陷的目的； 第二， 通过对轧 件长度方向的冷却控制，减少或补偿轧件在长度方向温度不均对带钢及钢板 厚度精度的影响， 提高带钢及钢板厚度精度。  The invention adopts the method of hot rolling strip steel and steel plate cooling and electric induction heating of the gas mist, and can achieve the following objectives more economically and effectively: First, changing the temperature distribution of the cross section of the rolled piece to correct the hot rolling Strip and steel plate crown, the purpose of the flatness of the plate shape defect; Second, through the cooling control of the length of the rolling piece, reduce or compensate the temperature unevenness of the rolled piece in the longitudinal direction to the thickness accuracy of the strip and the steel plate Influence, improve the thickness accuracy of strip and steel plate.
本发明通过如下方式实现：  The invention is achieved in the following manner:
1 ) 通过改变轧件宽度方向的温度分布来调节金属的变形能力， 从而达 到理想的板形控制， 即向轧件选择性的喷射冷却介质， 也可以采用电感应加 热装置对轧件在宽度方向上进行选择性的分段加热升温，改变轧件宽度方向 的温度分布。  1) Adjusting the deformation ability of the metal by changing the temperature distribution in the width direction of the rolled piece, thereby achieving the desired shape control, that is, selectively spraying the cooling medium to the rolled piece, or using an electric induction heating device to measure the width of the rolled piece in the width direction. The selective stepwise heating is performed to change the temperature distribution in the width direction of the rolled piece.
2) 通过对轧件的前部喷射一定的冷却介质， 并沿轧件长度方向逐渐减 少冷却量， 实现轧制温度均匀。这一功能可以根据工艺要求选择性的投入使 用。  2) By rolling a certain cooling medium on the front part of the rolled piece and gradually reducing the cooling amount along the length of the rolled piece, the rolling temperature is uniform. This feature can be selectively used depending on the process requirements.
3 ) 采用的冷却介质是通过空气雾化的冷却水， 即气雾冷却介质。 适量 气雾接触到高温的轧件会带走热量并蒸发到空气中，不会象冷却水流到相邻 的区域， 能够实现轧件准确的分区冷却控制。冷却方式的选择是本发明的要 素之一。电感应加热装置沿轧件宽度方向可分段对轧件进行加热升温是本发 明的另一要素。 3) The cooling medium used is cooling water atomized by air, that is, an aerosol cooling medium. The proper amount of aerosol contact with high temperature will take away heat and evaporate into the air. It will not flow to the adjacent area like cooling water, which can achieve accurate partition cooling control of the rolling stock. The choice of cooling method is the essence of the present invention One of the prime. The electric induction heating device can heat and heat the rolled product in sections along the width direction of the rolling stock, which is another element of the present invention.
4) 本发明的冷却装置， 布置在可逆式钢板轧机的前后， 在串联式热带 钢轧机中布置在轧机的前面和轧机机架之间。电感应加热装置布置在轧机前 或轧机机架之间。。  4) The cooling device of the present invention is disposed before and after the reversible steel plate rolling mill, and is disposed between the front of the rolling mill and the rolling stand in the tandem hot strip mill. The electric induction heating device is arranged between the rolling mill front or the rolling mill stand. .
5 )通过气雾冷却和电感应加热模型对钢板轧制后的板形效果进行计算， 完成对操作参数的设定，沿轧件宽度喷射的冷却参数以及电感应加热的参数 根据设定和反馈信息进行调整， 实现板形控制。  5) Calculate the shape effect of the steel plate after rolling by the aerosol cooling and electric induction heating model, complete the setting of the operating parameters, the cooling parameters sprayed along the width of the rolling piece and the parameters of the electric induction heating according to the setting and feedback Information is adjusted to achieve shape control.
6) 还可以通过轧机配套的板形仪、 测厚仪实现闭环控制。  6) Closed-loop control can also be realized by the shape meter and thickness gauge matched by the rolling mill.
7 ) 气雾冷却装置的喷射梁的布置可以和轧件的运送辊道平行布置， 也 可以垂直辊道布置。  7) The arrangement of the spray beams of the aerosol-cooling device may be arranged in parallel with the transport roller path of the rolling stock, or may be arranged in a vertical roller path.
8 ) 本发明可以单独使用， 也可以和其它板形控制装置合并使用。  8) The invention may be used alone or in combination with other shape control devices.
9 ) 气雾冷却装置主要由控制阀站、 冷却集管、 中间管道和自动控制系 统组成， 其中控制阀站、 冷却集管和中间管道站包括气路和水路两种管路。 电感应加热装置由电感应加热部和控制部分组成。  9) The aerosol cooling device is mainly composed of a control valve station, a cooling header, an intermediate pipe and an automatic control system, wherein the control valve station, the cooling header and the intermediate pipeline station comprise two types of pipelines: a gas pipeline and a water pipeline. The electric induction heating device is composed of an electric induction heating portion and a control portion.
附图说明 DRAWINGS
图 1〜3为带钢板形缺陷示意图  Figure 1 to 3 are schematic diagrams of strip-shaped defects
图 4为 CVC板形控制示意图  Figure 4 is a schematic diagram of CVC shape control
图 5为 PC板形控制示意图  Figure 5 is a schematic diagram of PC shape control
图 6为气雾冷却装置和电感应加热装置安装位置原理示意图（以串列式 机架为例）  Figure 6 is a schematic diagram of the installation position of the aerosol cooling device and the electric induction heating device (taking the tandem rack as an example)
图 7为轧件和气雾喷嘴的关系示意图  Figure 7 is a schematic diagram showing the relationship between the rolling stock and the aerosol nozzle.
图 8为轧件和电感应加热装置的关系示意图  Figure 8 is a schematic diagram showing the relationship between the rolled piece and the electric induction heating device.
图 9为控制逻辑图  Figure 9 is the control logic diagram
图中， 件 1为电感应加热装置， 件 2为气雾冷却装置， 件 3为轧机， 件 4为测量仪表， 件 5为喷嘴， 件 6为钢板或带钢， 件 7为电感应加热装置。 具体实施方式 下面结合附图 6〜8对本发明作进一歩详细说明： In the figure, the component 1 is an electric induction heating device, the component 2 is an aerosol cooling device, the component 3 is a rolling mill, the component 4 is a measuring instrument, the component 5 is a nozzle, the component 6 is a steel plate or a strip steel, and the component 7 is an electric induction heating device. . detailed description The present invention will be further described in detail below with reference to FIGS. 6-8.
气雾冷却装置 1布置在可逆式钢板轧机 2的前后，在串联式热带钢轧机 2中布置在轧机 2的前面和轧机 2机架之间；气雾冷却装置 1主要由控制阀 站、 冷却集管、 中间管道和自动控制系统组成， 其中控制阀站、 冷却集管和 中间管道站包括气路和水路两种管路。 气雾冷却装置 1与测量仪表 3连接， 测量仪表 3对控制阀站的阀门开度进行控制，喷嘴 4喷出经空气雾化的冷却 水， 即气雾冷却介质。  The aerosol cooling device 1 is arranged before and after the reversible steel plate rolling mill 2, and is disposed between the front of the rolling mill 2 and the rolling mill 2 frame in the tandem hot strip mill 2; the aerosol cooling device 1 is mainly controlled by a valve station, a cooling set The pipe, the intermediate pipe and the automatic control system are composed, wherein the control valve station, the cooling header and the intermediate pipeline station comprise two lines of a gas path and a water path. The aerosol cooling device 1 is connected to the measuring instrument 3, and the measuring instrument 3 controls the valve opening degree of the control valve station, and the nozzle 4 sprays the cooling water atomized by the air, that is, the aerosol cooling medium.
本发明通过气雾冷却模型对带钢 /钢板的冷却效果进行计算， 完成对冷 却装置的设定。 首先确定过程参数： 如带钢 /钢板的尺寸、 温度以及最终产 品的凸度、 平直度、 厚度目标值； 然后由轧制力能参数计算得到轧制压力、 辊系变形分析模型下得到轧制凸度；由变形抗力和温度模型得到轧件温度修 正要求和气雾冷却设定值； 对气雾冷却水量、 气压和集管等参数进行调整； 最后得到温度仪、 厚度仪、 平直度仪和凸度仪实测值。对实测值和设定值进 行比较， 如果一致， 则轧制继续进行， 否则， 对气雾冷却水量、 气压和集管 等参数进行调整，直至实测值和设定值一致。沿轧件宽度喷射的冷却参数根 据设定和反馈信息进行调整， 可以实现开环或闭环的板形控制。  The invention calculates the cooling effect of the strip/steel plate by the aerosol cooling model, and completes the setting of the cooling device. First determine the process parameters: such as the size of the strip / steel plate, the temperature and the convexity, flatness, and thickness target value of the final product; then the rolling pressure and the deformation analysis model of the roll system are obtained. The crown is obtained; the temperature correction requirement of the rolling stock and the set value of the aerosol cooling are obtained from the deformation resistance and the temperature model; the parameters such as the amount of the aerosol cooling water, the air pressure and the header are adjusted; finally, the temperature meter, the thickness meter, and the straightness meter are obtained. And the measured value of the convexity meter. If the measured value and the set value are compared, if they are consistent, the rolling will continue. Otherwise, the parameters such as the amount of aerosol cooling water, air pressure and header will be adjusted until the measured value and the set value are consistent. The cooling parameters injected along the width of the rolling stock are adjusted according to the setting and feedback information, and the open-loop or closed-loop shape control can be realized.
本发明通过改变轧件宽度方向的温度分布来调节金属的变形能力，从而 达到理想的板形控制， 即向轧件选择性的喷射冷却介质， 改变轧件宽度方向 的温度分布；通过对轧件的前部喷射一定的冷却介质， 并沿轧件长度方向逐 渐减少冷却量， 实现轧制温度均匀； 这一功能可以根据工艺要求选择性的投 入使用； 还可以通过轧机配套的板形仪、测厚仪实现闭环控制。气雾冷却装 置喷射梁的布置可以和轧件的运送辊道平行布置， 也可以垂直辊道布置； 本 发明可以单独使用， 也可以和其它板形控制装置合并使用。  The invention adjusts the deformation ability of the metal by changing the temperature distribution in the width direction of the rolling piece, thereby achieving the ideal shape control, that is, selectively spraying the cooling medium to the rolling piece, changing the temperature distribution in the width direction of the rolling piece; The front part sprays a certain cooling medium, and gradually reduces the cooling amount along the length of the rolling piece to achieve uniform rolling temperature; this function can be selectively used according to the process requirements; it can also pass the shape meter and test of the rolling mill. Thick gauges implement closed loop control. The arrangement of the spray beam of the aerosol-cooling device may be arranged in parallel with the conveying roller path of the rolling stock or may be arranged in a vertical roller path; the invention may be used alone or in combination with other shape control devices.
本发明完全能够满足对热轧带钢及钢板凸度、平直度和厚度精度控制的 要求， 制造出高质量的宽带钢板或带钢。  The invention fully satisfies the requirements for the control of the crown, flatness and thickness precision of the hot rolled strip and the steel sheet, and produces a high quality wide steel plate or strip.
本发明在原理上完全不同于现有的板形控制技术，结构简单，适用性强。 可以运用于新建的热轧机的板形控制或者对现有轧机进行板形控制改造，也 适用于有色金属的热轧带钢及钢板轧制。 具有广泛的推广价值。 The invention is completely different from the existing shape control technology in principle, and has a simple structure and strong applicability. It can be used for the shape control of new hot rolling mills or for the shape control of existing rolling mills. Suitable for hot rolled strip and steel sheet rolling of non-ferrous metals. Has a wide range of promotional value.

Claims

权 利 要 求 书 Claim
1、 一种热轧带钢及钢板板形和精度控制的方法， 其特征在于： 通过改 变轧件宽度方向的温度分布来调节金属的变形能力，从而达到理想的板形控 制， 可将下面的两种方式组合或单独使用， （1 ) 向轧件精确的喷射气雾冷却 介质改变轧件宽度方向的温度分布， （2 )采用电感应加热装置对轧件在宽度 方向上进行选择性的分段加热升温。 1. A method for controlling the shape and precision of hot rolled strip and steel sheet, characterized in that: by changing the temperature distribution in the width direction of the rolled piece to adjust the deformability of the metal, thereby achieving an ideal shape control, the following The two methods can be combined or used separately. (1) The precise injection of the aerosol cooling medium to the rolling stock changes the temperature distribution in the width direction of the rolling stock, and (2) the selective induction of the rolling stock in the width direction by the electric induction heating device. The section is heated to heat up.
2、 根据权利要求 1所述的热轧带钢及钢板板形和精度控制的方法， 其 特征在于：通过对轧件的前部喷射一定的冷却介质， 并沿轧件长度方向逐渐 的减少， 实现轧制温度均匀。  2. The method for controlling the shape and precision of hot rolled strip and steel sheet according to claim 1, wherein: a certain cooling medium is sprayed on the front portion of the rolled piece, and gradually decreases along the length of the rolled piece, Achieve uniform rolling temperature.
3、 根据权利要求 1所述的热轧带钢及钢板板形和精度控制的方法， 其 特征在于：通过温度和板形模型对钢板轧制后的板形效果进行计算，完成对 操作参数的设定，沿轧件宽度喷射的冷却参数以及电感应加热的参数根据设 定和反馈信息进行调整， 实现开环或闭环的板形控制。  3. The method for controlling the shape and precision of hot rolled strip and steel sheet according to claim 1, wherein the shape and shape of the steel sheet after rolling are calculated by a temperature and a plate shape model, and the operating parameters are completed. It is set that the cooling parameters injected along the width of the rolling stock and the parameters of the electric induction heating are adjusted according to the setting and feedback information to realize the open-loop or closed-loop shape control.
4、根据权利要求 1所述的热轧带钢及钢板板形和精度控制方法的设备， 其特征在于：气雾冷却装置布置在可逆式轧机的前后，在串联式热带钢轧件 中布置在轧机的前面和轧机机架之间， 同时向轧件的上、 下表面喷射气雾。  4. The apparatus for hot-rolled strip and steel sheet shape and precision control method according to claim 1, wherein the aerosol cooling device is arranged before and after the reversing rolling mill, and is arranged in the tandem tropical steel rolling stock. An aerosol is sprayed between the front of the rolling mill and the rolling mill frame while simultaneously feeding the upper and lower surfaces of the rolling stock.
5、 电感应加热装置布置在轧机前、 后或轧机机架之间。 电感应加热装 置沿轧件宽度方向可分段进行控制。  5. The electric induction heating device is arranged between the front and the rear of the rolling mill or between the rolling mill stands. The electric induction heating device can be controlled in sections along the width of the rolling stock.
6、根据权利要求 4所述的热轧带钢及钢板板形和精度控制方法的设备， 其特征在于： 气雾冷却装置的喷射梁的布置可以和轧件的运送辊道平行布 置， 也可以垂直辊道布置。  6. The apparatus for hot-rolled strip and steel sheet shape and precision control method according to claim 4, wherein: the spray beam of the aerosol cooling device is arranged in parallel with the conveying roller of the rolling stock, or Vertical roller arrangement.
7、 根据权利要求 4和 5所述的热轧带钢及钢板板形和精度控制方法的 设备， 其特征在于： 气雾冷却装置主要由控制阀站、 冷却集管、 中间管道和 自动控制系统组成，其中控制阀站、冷却集管和中间管道站包括气路和水路 两种管路。 电感应加热装置由电感应加热部和控制部分组成。  7. Apparatus for hot-rolled strip and steel sheet shape and precision control method according to claims 4 and 5, characterized in that: the aerosol cooling device is mainly composed of a control valve station, a cooling header, an intermediate pipe and an automatic control system The composition, wherein the control valve station, the cooling header and the intermediate pipeline station comprise two lines of a gas path and a water path. The electric induction heating device is composed of an electric induction heating portion and a control portion.
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