WO2024066741A1 - Device and method for ameliorating roller marks formed on surface of thin strip steel by pinch rollers - Google Patents

Device and method for ameliorating roller marks formed on surface of thin strip steel by pinch rollers Download PDF

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Publication number
WO2024066741A1
WO2024066741A1 PCT/CN2023/111280 CN2023111280W WO2024066741A1 WO 2024066741 A1 WO2024066741 A1 WO 2024066741A1 CN 2023111280 W CN2023111280 W CN 2023111280W WO 2024066741 A1 WO2024066741 A1 WO 2024066741A1
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WO
WIPO (PCT)
Prior art keywords
pinch roller
roller
thin strip
strip steel
cooling
Prior art date
Application number
PCT/CN2023/111280
Other languages
French (fr)
Chinese (zh)
Inventor
施一新
张淑娟
刘新院
李婷婷
李霞
李化龙
吴荣洲
刘玉君
周东生
Original Assignee
江苏省沙钢钢铁研究院有限公司
江苏沙钢集团有限公司
张家港中美超薄带科技有限公司
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Publication date
Application filed by 江苏省沙钢钢铁研究院有限公司, 江苏沙钢集团有限公司, 张家港中美超薄带科技有限公司 filed Critical 江苏省沙钢钢铁研究院有限公司
Publication of WO2024066741A1 publication Critical patent/WO2024066741A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/10—Arrangement or installation of feeding rollers in rolling stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B28/00—Maintaining rolls or rolling equipment in effective condition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
    • F25D3/11—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air with conveyors carrying articles to be cooled through the cooling space

Definitions

  • the invention relates to the technical field of steel rolling, and in particular to a device and method for improving the roller marks of pinch rollers on the surface of hot-rolled thin strip steel in a twin-roller thin strip casting and rolling production process.
  • Hot-rolled thin strip steel generally refers to thin strip steel with a thickness of 1 to 20 mm, which is widely used in industrial sectors such as automobiles, motors, chemicals, and shipbuilding. It is also used as raw material for the production of cold rolling, welded pipes, and cold-bent steel. In the application process, in addition to the usual mechanical properties, the requirements for the surface quality and plate shape of thin strip steel are getting higher and higher, especially for thin strip steel products with a thickness of less than 2.0 mm.
  • the present invention relates to a production method for producing hot-rolled thin strip steel with a thickness of less than 2.0 mm using a twin-roll thin strip casting technology.
  • a pinch roller device in patent CN101198421B (the patent is incorporated herein by reference in its entirety) is used to guide the thin strip steel and stabilize its position. Furthermore, in order to keep the thin strip steel warm, the pinch roller device is arranged in a closed hot box, and nitrogen is introduced for protection to prevent oxidation of the thin strip steel.
  • the upper and lower pinch rollers of the pinch roller device are convex rollers, when they come into contact with the thin strip steel with a temperature as high as 1300°C, it is very easy to cause the temperature of the part where the pinch roller contacts the thin strip steel to rise sharply, and the roller shape of the pinch roller changes due to thermal expansion, which in turn causes obvious pinch roller marks to appear at the part where the thin strip steel contacts the pinch roller. In severe cases, the entire roll may even be judged as defective.
  • the present invention provides a device and method for reducing or eliminating pinch roller marks on hot-rolled thin strip steel, that is, a cooling nozzle beam is arranged at the inlet and/or outlet of the pinch roller device, and a coolant (such as liquid nitrogen) is sprayed at the location of local thermal expansion of the pinch roller for cooling, so as to improve the local thermal expansion of the pinch roller.
  • a coolant such as liquid nitrogen
  • the invention also proposes to adjust the roller gap and pressure between the pinch rollers to further reduce the pinch roller roll mark defect.
  • the present invention relates to a device for improving the pinch roll marks on the surface of thin strip steel in a twin-roller thin strip casting and rolling production process, the device comprising:
  • the pinch roller device includes an upper pinch roller and a lower pinch roller formed as convex rollers, the upper pinch roller and the lower pinch roller apply pressure on the thin strip steel and clamp the thin strip steel therebetween, and the upper pinch roller and the lower pinch roller rotate in opposite directions to guide the thin strip steel to move in the forward direction of the thin strip steel.
  • a cooling control device is arranged upstream or downstream of the pinch roller device, and comprises: a main conveying pipeline for conveying coolant; a local cooling beam extending from the main conveying pipeline to the cooling position of the upper pinch roller and/or the lower pinch roller; a cooling nozzle arranged on the side of the local cooling beam facing the pinch roller device, for spraying the coolant to the cooling position; and a solenoid valve for controlling the switch of the cooling nozzle and the coolant flow rate.
  • each row of nozzles includes 35 to 40 nozzles, and the interval between adjacent nozzles in each row of nozzles is in the range of 1 to 20 mm, and each of the multiple nozzles of the cooling control device can be individually controlled by a solenoid valve to control its switch and coolant flow, and cool the corresponding local roller surface on the upper pinch roller or the lower pinch roller.
  • the coolant is liquid nitrogen.
  • At least one of the upper pinch roller and the lower pinch roller is connected to a displacement device, which can adjust the position of at least one of the upper pinch roller and the lower pinch roller to adjust the gap between the upper pinch roller and the lower pinch roller, and the gap is set to be adjustable within the range of 0.6mm to 2.0mm, and the pressure applied by the upper pinch roller and the lower pinch roller to the thin strip steel is adjustable, and the pressure is set within the range of 10-25kN.
  • the local cooling beam is connected to a driving device and can be driven close to or away from the pinch roller device via the driving device.
  • the driving device also includes a displacement sensor for measuring the distance between the local cooling beam and the roller surface of the pinch roller.
  • the driving device is a hydraulic drive for driving the local cooling beam to move closer to or away from the roller surface of the pinch roller.
  • an image capturing device is provided downstream of the pinch roller device along the advancing direction of the thin steel strip, for obtaining an image of the surface of the thin steel strip.
  • the pinch roller device also includes a determination device for determining whether there are roller marks and/or roller mark positions on the surface of the thin strip steel based on an image of the thin strip steel surface obtained by an image capture device, and the device also includes a control device for controlling the respective opening and closing states and coolant flow rates of multiple nozzles of the cooling control unit based on a determination result of the determination device to cool the surfaces of the upper pinch roller and/or the lower pinch roller.
  • the thickness of the thin steel strip is less than 2.0 mm.
  • the present invention also relates to a method for improving the roller marks of the pinch rollers on the surface of thin strip steel produced in the twin-roller thin strip casting and rolling production process by using the above-mentioned device.
  • the present invention can spray coolant locally according to the surface condition of the steel strip by adding a local cooling device, thereby improving the local expansion of the pinch roller and ensuring the stability of the pinch roller shape; and by adjusting the roller gap and pressure between the pinch rollers, the problem of pinch roller roller marks generated by the twin-roll casting production of hot-rolled thin strip steel can be improved. Therefore, the defect rate of products can be reduced, and the product qualification rate and profit level can be improved.
  • FIG1 is a schematic diagram showing a pinch roller device 100 guiding a thin steel strip 200 to advance
  • FIG. 2A is a schematic diagram showing a pinch roller device 100 and a thin steel strip 200 viewed along a forward direction A of the thin steel strip;
  • FIG. 2B is a schematic diagram showing deformation of the pinch rollers due to local thermal expansion of the pinch rollers 110A, 110B in contact with the thin steel strip 200;
  • FIG3 is a schematic diagram showing a portion of the surface of the thin steel strip where pinch roller marks are formed on the surface of the thin steel strip due to deformation of the pinch rollers;
  • FIG4 is a schematic diagram showing a method of cooling the pinch roller device 100 using the cooling control device 300;
  • FIG5 shows a schematic diagram of the nozzle arrangement of the chilled beam 320
  • FIG. 6 shows a cooling control device 300 according to the present invention used to cool the pinch roller. Surface image of the thin strip produced.
  • the pinch roller device 100 includes an upper pinch roller 110A and a lower pinch roller 110B.
  • the upper pinch roller 110A and the lower pinch roller 110B clamp the thin strip steel 200 formed by twin-roll thin strip casting therebetween and apply a certain pressure thereon to keep its position stable.
  • the upper pinch roller 110A and the lower pinch roller 110B rotate in opposite directions to guide the thin strip steel 200 to advance in the thin strip steel advancing direction A.
  • FIG2A is a schematic diagram of the pinch roller device 100 and the thin strip steel 200 viewed along the advancing direction A of the thin strip steel
  • FIG2B is a schematic diagram of the deformation of the pinch rollers due to the local thermal expansion of the pinch rollers 110A and 110B in contact with the thin strip steel 200. It should be noted that the deformation of the pinch rollers in FIG2B is only shown in an exaggerated manner for the purpose of clarity, and the actual deformation ratio is not the same as the deformation ratio shown in the accompanying drawings.
  • the upper pinch roller 110A and the lower pinch roller 110B of the pinch roller device 100 are both convex rollers, which mainly play the role of correcting the thin strip steel 200 to avoid the thin strip steel from being offset in the width direction, thereby ensuring that the thin strip steel is kept centered in other subsequent processes (such as hot rolling).
  • the pinch rollers 110A and 110B are convex rollers, the temperature of the thin strip steel 200 is as high as 1300°C or even higher during the production process, and the pinch rollers 110A and 110B are partially in contact with the thin strip steel 200 at their convex parts, resulting in a sharp increase in the temperature of the local parts 120A and 120B where the pinch rollers 110A and 110B contact the thin strip steel 200.
  • the temperature difference between the contact parts 120A, 120B and other parts of the pinch rollers becomes larger and larger, resulting in inconsistent thermal expansion of various parts of the pinch rollers, and ultimately causing the roller shapes of the pinch rollers 110A, 110B at the contact parts 120A, 120B to change, such as As shown in Figure 2B.
  • the position where the pinch rollers 110A and 110B contact the thin strip steel 200 may produce local deformation or bulges 120A' and 120B' due to inconsistent thermal expansion.
  • FIG4 shows a schematic diagram of cooling the pinch roller device 100 using a cooling control device 300.
  • the cooling control device 300 can be arranged upstream or downstream of the pinch roller device 100 (here, "upstream” or “downstream” refers to the advancing direction A of the thin strip steel).
  • the cooling device 300 is arranged upstream of the pinch roller device 100; in an alternative solution, the cooling device 300 can also be arranged downstream of the pinch roller device 100.
  • the cooling control device 300 includes a main delivery pipe 310 for delivering coolant, a local cooling beam 320 extending from the main delivery pipe 310 to the cooling part, a cooling nozzle 330, and a solenoid valve (not shown) for controlling the switch and flow rate of the cooling nozzle 330.
  • the cooling control device 300 is controlled as a whole by an electronic and automated control unit 400.
  • the main delivery pipe 310 is used to deliver the coolant to the local cooling beam 320, and then spray the coolant to the corresponding local surface of the pinch rollers 110A and 110B through the cooling nozzle 330, so as to prevent the surface of the pinch rollers 110A and 110B from overheating and causing deformation.
  • the coolant is liquid nitrogen; alternatively, the coolant can also be selected as dry ice, nitrogen, etc.
  • FIG. 5 shows a schematic diagram of the nozzle arrangement of the cooling beam 320.
  • one or more nozzles 330 are provided at the end of the cooling beam 320 facing the pinch roller, for spraying the coolant (such as liquid nitrogen) onto the corresponding surface of the pinch roller.
  • the coolant such as liquid nitrogen
  • two rows of nozzles are arranged on the end surface of each cooling beam 320, and the interval GL between adjacent nozzles in each row of nozzles is in the range of 1-20 mm, and the interval GH between the upper and lower nozzles is in the range of 20-60 mm, so that the overheated area of the pinch roller can be fully and evenly cooled.
  • the upper row of nozzles is arranged to be substantially aligned with the lower row of nozzles, and each includes 35-40 nozzles; in an alternative embodiment, the upper row of nozzles can be staggered with the lower row of nozzles; in a further alternative embodiment, the end surface of each cooling beam can be provided with a single row or more than three rows of nozzles.
  • Each nozzle corresponds to a corresponding part of the roller surface of the pinch roller, and the switch and flow rate of each nozzle can be individually controlled by a solenoid valve to cool down the pinch roller accordingly according to the overheating position and degree.
  • the gap between the upper pinch roller 110A and the lower pinch roller 110B can be adjusted according to the thickness of the thin steel strip 200, for example, within a range of 0.6 mm to 2.0 mm, to accommodate thin steel strips of different thickness requirements.
  • at least one of the upper pinch roller 110A and the lower pinch roller 110B is connected to a displacement device, for example, driven by hydraulic means, so that the gap between the upper pinch roller 110A and the lower pinch roller 110B can be automatically or manually adjusted through the displacement device.
  • the pressure between the upper and lower pinch rollers can also be adjusted, for example, within a range of 10 kN to 25 kN, for example, when the pinch rollers are deformed and bulged due to local overheating, the pressure between the upper and lower pinch rollers is reduced to avoid indentations on the thin steel strip.
  • the local cooling beam 320 can move closer to the surface of the pinch roller, or move away from the surface of the pinch roller.
  • the local cooling beam 320 is connected to a driving device (not shown) driven by hydraulic pressure, for example, and is controlled by the driving device to move closer to or away from the roller surface of the pinch roller.
  • the driving device can be arranged in the pinch roller frame and equipped with a displacement sensor to measure and control the distance between the local cooling beam 320 and the nozzle 330 thereon and the roller surface of the pinch roller.
  • an image capture device and a determination device may be provided downstream of the pinch roller device 100 along the advancing direction A of the thin strip steel (e.g., at the hot rolling exit) to obtain an image of the surface of the thin strip steel, and determine whether there is a roller mark on the surface of the thin strip steel, and/or the position of the roller mark, and then determine whether the produced thin strip steel is qualified.
  • the control device 400 may automatically control the respective opening and closing states and coolant flow rates of the plurality of nozzles 330 of the cooling control unit 300 according to the determination results of the image capture device and the determination device, to cool or partially cool the surface of the pinch roller, so as to avoid the formation of roller marks or causing unqualified products.
  • the image of the thin strip steel surface obtained by the image capture device may be manually observed, and the cooling parameters of the cooling control unit 300 may be manually controlled according to the surface state of the thin strip steel.
  • FIG6 shows a thin strip steel produced by cooling the pinch rollers using the cooling control device 300 according to the present invention, wherein each local cooling beam is provided with 40 cooling nozzles, numbered 1 to 40 respectively.
  • the nozzles of the 15th to 25th groups in the middle of the thin strip steel are set to the open state, and the remaining nozzles 1-14 and 26-40 are set to the closed state, and the pinch roller pressure is adjusted to 18 kN. It can be seen that the thin strip steel finally produced has no obvious indentation, the surface state is good, and meets the production qualification requirements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
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  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
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Abstract

Provided in the present invention is a device for ameliorating roller marks formed on a surface of thin strip steel by pinch rollers. In the design of the device, a local cooling beam is provided at the entrance or exit of pinch rollers to spray liquid nitrogen in the local thermal expansion region of the pinch rollers for cooling, so as to ameliorate local thermal expansion of the pinch rollers in order to adjust the roller gap and pressure between the pinch rollers, thereby reducing roller mark defects formed by the pinch rollers. In addition, further provided in the present invention is a method for alleviating pinch roller marks on hot-rolled thin strip steel during double-roller casting and rolling production. By means of the device and method for ameliorating roller marks formed on a surface of thin strip steel by pinch rollers, the rejection rate of thin strip steel products can be effectively reduced, and the qualification rate and profitability of thin strip steel products are improved.

Description

一种改善薄带钢表面夹送辊辊印的装置及方法A device and method for improving the roller mark of pinch roller on the surface of thin strip steel 技术领域Technical Field
本发明涉及轧钢技术领域，尤其涉及一种在双辊薄带铸轧生产过程中改善热轧薄带钢表面夹送辊辊印的装置及方法。The invention relates to the technical field of steel rolling, and in particular to a device and method for improving the roller marks of pinch rollers on the surface of hot-rolled thin strip steel in a twin-roller thin strip casting and rolling production process.
背景技术Background technique
热轧薄带钢一般是指厚度为1～20mm的薄带钢，广泛用于汽车、电机、化工、造船等工业部门，同时也作为冷轧、焊管、冷弯型钢生产的原料。在应用过程中，除了通常的力学性能外，对薄带钢的表面质量和板形的要求越来越高，尤其是厚度为2.0mm以下的薄带钢产品。在传统工艺中，在薄带钢的热轧过程中通常采用在薄带钢的侧部设置侧导板来对薄带钢进行引导并对中的方案；但对于厚度为2.0mm以下的薄带钢产品，传统的采用侧导板对中的方式会导致翻边，引起薄带钢弯曲、变形、褶皱等缺陷，严重影响薄带钢产品质量。Hot-rolled thin strip steel generally refers to thin strip steel with a thickness of 1 to 20 mm, which is widely used in industrial sectors such as automobiles, motors, chemicals, and shipbuilding. It is also used as raw material for the production of cold rolling, welded pipes, and cold-bent steel. In the application process, in addition to the usual mechanical properties, the requirements for the surface quality and plate shape of thin strip steel are getting higher and higher, especially for thin strip steel products with a thickness of less than 2.0 mm. In traditional processes, during the hot rolling process of thin strip steel, side guides are usually set on the side of the thin strip steel to guide and center the thin strip steel; however, for thin strip steel products with a thickness of less than 2.0 mm, the traditional method of using side guides for centering will lead to flanging, causing defects such as bending, deformation, and wrinkling of the thin strip steel, which seriously affects the quality of thin strip steel products.
本发明涉及一种利用双辊薄带铸轧技术生产厚度为2.0mm以下的热轧薄带钢的生产方法。在根据本发明的薄带钢的生产过程中，采用专利CN101198421B中的夹送辊装置(该专利通过引用全文并入于此)引导薄带钢并使其位置稳定。进一步地，为了薄带钢保温，夹送辊装置设置在密闭的热箱内，同时通入氮气进行保护，防止薄带钢氧化。The present invention relates to a production method for producing hot-rolled thin strip steel with a thickness of less than 2.0 mm using a twin-roll thin strip casting technology. In the production process of the thin strip steel according to the present invention, a pinch roller device in patent CN101198421B (the patent is incorporated herein by reference in its entirety) is used to guide the thin strip steel and stabilize its position. Furthermore, in order to keep the thin strip steel warm, the pinch roller device is arranged in a closed hot box, and nitrogen is introduced for protection to prevent oxidation of the thin strip steel.
由于夹送辊装置的上下夹送辊均为凸辊，在其与温度高达1300℃的薄带钢接触的过程中，极易导致夹送辊接触薄带钢的部位温度急剧升高，并由于热膨胀导致夹送辊辊型发生变化，进而导致薄带钢与夹送辊接触的部位会出现明显的夹送辊辊印，情况严重时甚至整卷判次。Since the upper and lower pinch rollers of the pinch roller device are convex rollers, when they come into contact with the thin strip steel with a temperature as high as 1300°C, it is very easy to cause the temperature of the part where the pinch roller contacts the thin strip steel to rise sharply, and the roller shape of the pinch roller changes due to thermal expansion, which in turn causes obvious pinch roller marks to appear at the part where the thin strip steel contacts the pinch roller. In severe cases, the entire roll may even be judged as defective.
发明内容Summary of the invention
为改善夹送辊与薄带钢局部接触造成的热膨胀而导致薄带钢表面夹送辊辊印的问题，本发明提供了一种减少或消除热轧薄带钢夹送辊辊印的装置及方法，即在夹送辊装置的入口和/或出口设置冷却喷嘴梁，在夹送辊局部热膨胀的位置喷射冷却剂(如液氮)进行冷却，以改善夹送辊的局部热 膨胀以及夹送辊局部变形的问题。此外，本发明还提出调整夹送辊之间的辊缝及压力，进一步减弱夹送辊辊印缺陷。In order to improve the problem of pinch roller marks on the surface of thin strip steel caused by thermal expansion caused by local contact between pinch rollers and thin strip steel, the present invention provides a device and method for reducing or eliminating pinch roller marks on hot-rolled thin strip steel, that is, a cooling nozzle beam is arranged at the inlet and/or outlet of the pinch roller device, and a coolant (such as liquid nitrogen) is sprayed at the location of local thermal expansion of the pinch roller for cooling, so as to improve the local thermal expansion of the pinch roller. In addition, the invention also proposes to adjust the roller gap and pressure between the pinch rollers to further reduce the pinch roller roll mark defect.
具体来说，本发明涉及一种用于在双辊薄带铸轧生产过程中改善薄带钢表面夹送辊辊印的装置，装置包括：Specifically, the present invention relates to a device for improving the pinch roll marks on the surface of thin strip steel in a twin-roller thin strip casting and rolling production process, the device comprising:
夹送辊装置，包括形成为凸形辊的上夹送辊和下夹送辊，上夹送辊和下夹送辊在薄带钢上施加压力并将薄带钢夹持于其间，上夹送辊和下夹送辊绕相反方向旋转、以引导薄带钢沿薄带钢前进方向行进。The pinch roller device includes an upper pinch roller and a lower pinch roller formed as convex rollers, the upper pinch roller and the lower pinch roller apply pressure on the thin strip steel and clamp the thin strip steel therebetween, and the upper pinch roller and the lower pinch roller rotate in opposite directions to guide the thin strip steel to move in the forward direction of the thin strip steel.
冷却控制装置，设置在夹送辊装置的上游或下游，其包括：主输送管道，用于输送冷却剂；局部冷却梁，从主输送管道延伸至上夹送辊和/或下夹送辊的冷却部位；冷却喷嘴，设置在局部冷却梁的面向夹送辊装置的一侧上，用于将冷却剂喷洒至冷却部位；以及电磁阀，用于控制冷却喷嘴的开关和冷却剂流量。A cooling control device is arranged upstream or downstream of the pinch roller device, and comprises: a main conveying pipeline for conveying coolant; a local cooling beam extending from the main conveying pipeline to the cooling position of the upper pinch roller and/or the lower pinch roller; a cooling nozzle arranged on the side of the local cooling beam facing the pinch roller device, for spraying the coolant to the cooling position; and a solenoid valve for controlling the switch of the cooling nozzle and the coolant flow rate.
在一个优选的实施例中，局部冷却梁的面向夹送辊装置的一侧上布置有两排喷嘴，每排喷嘴包括喷嘴数量在35～40个的范围内，且每排喷嘴的相邻喷嘴间的间隔为1～20mm的范围内，并且冷却控制装置的多个喷嘴的每个可经由电磁阀单独控制其开关和冷却剂流量，并冷却上夹送辊或下夹送辊上的对应局部辊面。In a preferred embodiment, two rows of nozzles are arranged on the side of the local cooling beam facing the pinch roller device, each row of nozzles includes 35 to 40 nozzles, and the interval between adjacent nozzles in each row of nozzles is in the range of 1 to 20 mm, and each of the multiple nozzles of the cooling control device can be individually controlled by a solenoid valve to control its switch and coolant flow, and cool the corresponding local roller surface on the upper pinch roller or the lower pinch roller.
在一个优选的实施例中，冷却剂为液氮。In a preferred embodiment, the coolant is liquid nitrogen.
在一个优选的实施例中，上夹送辊和下夹送辊中至少一个连接至位移装置，位移装置能够调节上夹送辊和下夹送辊中至少一个的位置，以调节上夹送辊和下夹送辊之间的间隙，间隙设置为在0.6mm～2.0mm的范围内可调，并且上夹送辊和下夹送辊施加于薄带钢的压力是可调的，并且压力设置在10-25kN的范围内。In a preferred embodiment, at least one of the upper pinch roller and the lower pinch roller is connected to a displacement device, which can adjust the position of at least one of the upper pinch roller and the lower pinch roller to adjust the gap between the upper pinch roller and the lower pinch roller, and the gap is set to be adjustable within the range of 0.6mm to 2.0mm, and the pressure applied by the upper pinch roller and the lower pinch roller to the thin strip steel is adjustable, and the pressure is set within the range of 10-25kN.
在一个优选的实施例中，局部冷却梁连接至驱动装置，并能够经由驱动装置驱动靠近或远离夹送辊装置，驱动装置还包括位移传感器，用于测量局部冷却梁与夹送辊的辊面之间的距离。In a preferred embodiment, the local cooling beam is connected to a driving device and can be driven close to or away from the pinch roller device via the driving device. The driving device also includes a displacement sensor for measuring the distance between the local cooling beam and the roller surface of the pinch roller.
在一个优选的实施例中，驱动装置为液压驱动，用于驱动局部冷却梁移动靠近或远离夹送辊的辊面。In a preferred embodiment, the driving device is a hydraulic drive for driving the local cooling beam to move closer to or away from the roller surface of the pinch roller.
在一个优选的实施例中，夹送辊装置的沿薄带钢前进方向的下游设置有图像捕获装置，用于获得薄带钢表面的图像。 In a preferred embodiment, an image capturing device is provided downstream of the pinch roller device along the advancing direction of the thin steel strip, for obtaining an image of the surface of the thin steel strip.
在一个优选的实施例中，夹送辊装置还包括判定装置，用于根据图像捕获装置获得的薄带钢表面的图像、来判定薄带钢的表面是否存在辊印和/或辊印位置，并且装置还包括控制装置，控制装置根据判定装置的判定结果，控制冷却控制单元的多个喷嘴的分别的开闭状态和冷却剂流量，来对上夹送辊和/或下夹送辊的表面进行冷却。In a preferred embodiment, the pinch roller device also includes a determination device for determining whether there are roller marks and/or roller mark positions on the surface of the thin strip steel based on an image of the thin strip steel surface obtained by an image capture device, and the device also includes a control device for controlling the respective opening and closing states and coolant flow rates of multiple nozzles of the cooling control unit based on a determination result of the determination device to cool the surfaces of the upper pinch roller and/or the lower pinch roller.
在一个优选的实施例中，薄带钢的厚度为2.0mm以下。In a preferred embodiment, the thickness of the thin steel strip is less than 2.0 mm.
同时，本发明还涉及一种采用前述装置改善在双辊薄带铸轧生产过程中生产的薄带钢表面夹送辊辊印的方法。At the same time, the present invention also relates to a method for improving the roller marks of the pinch rollers on the surface of thin strip steel produced in the twin-roller thin strip casting and rolling production process by using the above-mentioned device.
有益技术效果Beneficial technical effects
与现有技术相比，本发明的优点在于：Compared with the prior art, the advantages of the present invention are:
本发明通过增设局部冷却装置，可根据带钢的表面情况，在局部喷射冷却剂，改善夹送辊局部膨胀，保证夹送辊辊形稳定；以及通过调整夹送辊之间的辊缝及压力，改善双辊铸轧生产热轧薄带钢产生的夹送辊辊印的问题。因此，可以减小产品的判次率，提高产品合格率和盈利水平。The present invention can spray coolant locally according to the surface condition of the steel strip by adding a local cooling device, thereby improving the local expansion of the pinch roller and ensuring the stability of the pinch roller shape; and by adjusting the roller gap and pressure between the pinch rollers, the problem of pinch roller roller marks generated by the twin-roll casting production of hot-rolled thin strip steel can be improved. Therefore, the defect rate of products can be reduced, and the product qualification rate and profit level can be improved.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
为了更清楚地说明本发明的实施例的技术方案，下面将对实施例的附图作简单的介绍。显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例，而非对本发明的限制。In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.
图1示出了夹送辊装置100引导薄带钢200前进的示意图；FIG1 is a schematic diagram showing a pinch roller device 100 guiding a thin steel strip 200 to advance;
图2A示出了沿薄带钢前进方向A看的夹送辊装置100和薄带钢200的示意图；图2B示出了因夹送辊110A、110B与薄带钢200接触局部热膨胀而导致夹送辊变形的示意图；FIG. 2A is a schematic diagram showing a pinch roller device 100 and a thin steel strip 200 viewed along a forward direction A of the thin steel strip; FIG. 2B is a schematic diagram showing deformation of the pinch rollers due to local thermal expansion of the pinch rollers 110A, 110B in contact with the thin steel strip 200;
图3示出了由于夹送辊变形在薄带钢表面形成夹送辊辊印的薄带钢表面部分的示意图；FIG3 is a schematic diagram showing a portion of the surface of the thin steel strip where pinch roller marks are formed on the surface of the thin steel strip due to deformation of the pinch rollers;
图4示出了采用冷却控制装置300对夹送辊装置100进行冷却的示意图；FIG4 is a schematic diagram showing a method of cooling the pinch roller device 100 using the cooling control device 300;
图5示出了冷却梁320的喷嘴布置的示意图；FIG5 shows a schematic diagram of the nozzle arrangement of the chilled beam 320;
图6示出了采用了根据本发明的冷却控制装置300对夹送辊进行冷却 后生产的薄带钢的表面图片。FIG. 6 shows a cooling control device 300 according to the present invention used to cool the pinch roller. Surface image of the thin strip produced.
具体实施方式Detailed ways
为了使本发明实施例的目的、技术方案和优点更加清楚，下面将对本发明实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
除非另作定义，本发明所使用的技术术语或科学术语应当为本发明所属领域具有一般技能的人士所理解的通常意义。Unless otherwise defined, technical or scientific terms used in the present invention shall have the common meanings understood by one of ordinary skill in the art to which the present invention belongs.
如图1所示，示出了夹送辊装置100引导薄带钢200前进的示意图。具体来说，夹送辊装置100包括上夹送辊110A和下夹送辊110B。上夹送辊110A和下夹送辊110B将双辊薄带铸轧形成的薄带钢200夹持于其间、并在其上施加一定的压力，以保持其位置稳定。同时，上夹送辊110A和下夹送辊110B沿相反方向旋转，以引导薄带钢200沿薄带钢前进方向A行进。As shown in FIG1 , a schematic diagram of a pinch roller device 100 guiding a thin strip steel 200 to advance is shown. Specifically, the pinch roller device 100 includes an upper pinch roller 110A and a lower pinch roller 110B. The upper pinch roller 110A and the lower pinch roller 110B clamp the thin strip steel 200 formed by twin-roll thin strip casting therebetween and apply a certain pressure thereon to keep its position stable. At the same time, the upper pinch roller 110A and the lower pinch roller 110B rotate in opposite directions to guide the thin strip steel 200 to advance in the thin strip steel advancing direction A.
图2A示出了沿薄带钢前进方向A看的夹送辊装置100和薄带钢200的示意图；图2B示出了因夹送辊110A、110B与薄带钢200接触局部热膨胀而导致夹送辊变形的示意图。需要说明的是，图2B中的夹送辊变形仅仅是为了清楚的目的以夸张的方式示出，实际的变形比例并非与附图中所示出的变形比例相同。FIG2A is a schematic diagram of the pinch roller device 100 and the thin strip steel 200 viewed along the advancing direction A of the thin strip steel; FIG2B is a schematic diagram of the deformation of the pinch rollers due to the local thermal expansion of the pinch rollers 110A and 110B in contact with the thin strip steel 200. It should be noted that the deformation of the pinch rollers in FIG2B is only shown in an exaggerated manner for the purpose of clarity, and the actual deformation ratio is not the same as the deformation ratio shown in the accompanying drawings.
如图2A所示，夹送辊装置100的上夹送辊110A和下夹送辊110B均为凸辊，主要起到纠偏薄带钢200、以避免薄带钢沿宽度方向的偏移，进而保证在后续的其他工艺过程(如热轧)中保持薄带钢居中。由于夹送辊110A、110B为凸辊，在生产过程中薄带钢200的温度高达1300℃甚至以上，而夹送辊110A、110B与薄带钢200在其凸起部分局部接触，导致夹送辊110A、110B接触薄带钢200的局部部位120A、120B处的温度急剧升高。随着生产过程的持续进行(如生产时间持续1小时以上)，该接触部位120A、120B与夹送辊其他部位的温差越来越大，导致夹送辊各个部位的热膨胀不一致，最终导致夹送辊110A、110B在接触部位120A、120B的辊形发生变化，如 图2B所示。参考图2B，夹送辊110A、110B接触薄带钢200的位置可能由于热膨胀不一致，而产生局部变形或隆起120A’、120B’。此时，若夹送辊110A、110B仍在薄带钢200上施加相同的压力进行纠偏时，由于夹送辊的局部变形，薄带钢200与夹送辊接触的部位会出现明显的压痕，实际工艺中产生的缺陷如图3所示，情况严重时整卷判次，导致次品率上升。As shown in FIG2A , the upper pinch roller 110A and the lower pinch roller 110B of the pinch roller device 100 are both convex rollers, which mainly play the role of correcting the thin strip steel 200 to avoid the thin strip steel from being offset in the width direction, thereby ensuring that the thin strip steel is kept centered in other subsequent processes (such as hot rolling). Since the pinch rollers 110A and 110B are convex rollers, the temperature of the thin strip steel 200 is as high as 1300°C or even higher during the production process, and the pinch rollers 110A and 110B are partially in contact with the thin strip steel 200 at their convex parts, resulting in a sharp increase in the temperature of the local parts 120A and 120B where the pinch rollers 110A and 110B contact the thin strip steel 200. As the production process continues (e.g., the production time lasts for more than 1 hour), the temperature difference between the contact parts 120A, 120B and other parts of the pinch rollers becomes larger and larger, resulting in inconsistent thermal expansion of various parts of the pinch rollers, and ultimately causing the roller shapes of the pinch rollers 110A, 110B at the contact parts 120A, 120B to change, such as As shown in Figure 2B. Referring to Figure 2B, the position where the pinch rollers 110A and 110B contact the thin strip steel 200 may produce local deformation or bulges 120A' and 120B' due to inconsistent thermal expansion. At this time, if the pinch rollers 110A and 110B still apply the same pressure on the thin strip steel 200 to correct the deviation, due to the local deformation of the pinch rollers, obvious indentations will appear at the contact point between the thin strip steel 200 and the pinch rollers. The defects generated in the actual process are shown in Figure 3. In serious cases, the entire roll is judged as defective, resulting in an increase in the defective rate.
图4示出了采用冷却控制装置300对夹送辊装置100进行冷却的示意图。冷却控制装置300可以设置在夹送辊装置100的上游或下游(此处“上游”或“下游”是指相对于薄带钢前进方向A而言)。在图4中示出的实施例中，冷却装置300设置在夹送辊装置100的上游处；在替代的方案中，冷却装置300也可设置夹送辊装置100的下游处。FIG4 shows a schematic diagram of cooling the pinch roller device 100 using a cooling control device 300. The cooling control device 300 can be arranged upstream or downstream of the pinch roller device 100 (here, "upstream" or "downstream" refers to the advancing direction A of the thin strip steel). In the embodiment shown in FIG4 , the cooling device 300 is arranged upstream of the pinch roller device 100; in an alternative solution, the cooling device 300 can also be arranged downstream of the pinch roller device 100.
冷却控制装置300包括用于输送冷却剂的主输送管道310、从主输送管道310延伸至冷却部位的局部冷却梁320、冷却喷嘴330、以及控制冷却喷嘴330开关和流量的电磁阀(未示出)。此外，冷却控制装置300整体通过电子自动化的控制单元400控制。具体来说，主输送管道310用于将冷却剂输送至局部冷却梁320、进而经由冷却喷嘴330喷洒至夹送辊110A、110B的相应局部表面，以避免夹送辊110A、110B的表面过热而引起变形。优选地，冷却剂为液氮；替代地，冷却剂也可以选择为干冰、氮气等。The cooling control device 300 includes a main delivery pipe 310 for delivering coolant, a local cooling beam 320 extending from the main delivery pipe 310 to the cooling part, a cooling nozzle 330, and a solenoid valve (not shown) for controlling the switch and flow rate of the cooling nozzle 330. In addition, the cooling control device 300 is controlled as a whole by an electronic and automated control unit 400. Specifically, the main delivery pipe 310 is used to deliver the coolant to the local cooling beam 320, and then spray the coolant to the corresponding local surface of the pinch rollers 110A and 110B through the cooling nozzle 330, so as to prevent the surface of the pinch rollers 110A and 110B from overheating and causing deformation. Preferably, the coolant is liquid nitrogen; alternatively, the coolant can also be selected as dry ice, nitrogen, etc.
冷却剂经由一个或多个局部冷却梁320被输送至相应的冷却部位。图5示出了冷却梁320的喷嘴布置的示意图。如图5示意性地示出，冷却梁320面向夹送辊的端部设置有一个或多个喷嘴330，用于将冷却剂(如液氮)喷洒至夹送辊的相应表面。在示例性实施例中，每个冷却梁320的端面布置有两排喷嘴，每排喷嘴的相邻喷嘴间的间隔GL在1-20mm的范围内，上下喷嘴之间的间隔GH在20-60mm的范围内，以使得能够对夹送辊的过热区域进行全面且均匀的冷却。优选地，上排喷嘴设置为和下排喷嘴基本对齐，并分别包括35-40个喷嘴；在替代的实施例中，上排喷嘴可以和下排喷嘴交错设置；在进一步替代的实施例中，每个冷却梁的端面可设置有单排或三排以上的喷嘴。The coolant is delivered to the corresponding cooling part via one or more local cooling beams 320. FIG. 5 shows a schematic diagram of the nozzle arrangement of the cooling beam 320. As schematically shown in FIG. 5, one or more nozzles 330 are provided at the end of the cooling beam 320 facing the pinch roller, for spraying the coolant (such as liquid nitrogen) onto the corresponding surface of the pinch roller. In an exemplary embodiment, two rows of nozzles are arranged on the end surface of each cooling beam 320, and the interval GL between adjacent nozzles in each row of nozzles is in the range of 1-20 mm, and the interval GH between the upper and lower nozzles is in the range of 20-60 mm, so that the overheated area of the pinch roller can be fully and evenly cooled. Preferably, the upper row of nozzles is arranged to be substantially aligned with the lower row of nozzles, and each includes 35-40 nozzles; in an alternative embodiment, the upper row of nozzles can be staggered with the lower row of nozzles; in a further alternative embodiment, the end surface of each cooling beam can be provided with a single row or more than three rows of nozzles.
每个喷嘴对应夹送辊辊面的相应局部，且每个喷嘴的开关和流量大小可通过电磁阀单独控制，以根据夹送辊的过热位置和程度，相应地进行降温。 Each nozzle corresponds to a corresponding part of the roller surface of the pinch roller, and the switch and flow rate of each nozzle can be individually controlled by a solenoid valve to cool down the pinch roller accordingly according to the overheating position and degree.
返回参考图4，上夹送辊110A和下夹送辊110B之间的辊缝可根据薄带钢200的厚度进行调节，例如在0.6mm～2.0mm的范围内可调，以适应不同厚度要求的薄带钢。例如，上夹送辊110A和下夹送辊110B中至少一个连接有例如以液压方式驱动的位移装置，以能够通过该位移装置自动地或手动地调节上夹送辊110A和下夹送辊110B之间的间隙。此外，上下夹送辊之间的压力也可进行调节，例如可在10kN～25kN的范围内可调，例如在夹送辊因局部过热而发生变形隆起时减小上下夹送辊之间的压力，以避免在薄带钢上产生压痕。Referring back to FIG. 4 , the gap between the upper pinch roller 110A and the lower pinch roller 110B can be adjusted according to the thickness of the thin steel strip 200, for example, within a range of 0.6 mm to 2.0 mm, to accommodate thin steel strips of different thickness requirements. For example, at least one of the upper pinch roller 110A and the lower pinch roller 110B is connected to a displacement device, for example, driven by hydraulic means, so that the gap between the upper pinch roller 110A and the lower pinch roller 110B can be automatically or manually adjusted through the displacement device. In addition, the pressure between the upper and lower pinch rollers can also be adjusted, for example, within a range of 10 kN to 25 kN, for example, when the pinch rollers are deformed and bulged due to local overheating, the pressure between the upper and lower pinch rollers is reduced to avoid indentations on the thin steel strip.
局部冷却梁320可移动接近夹送辊表面、或移动远离夹送辊表面。具体来说，局部冷却梁320连接至例如以液压驱动的驱动装置(未示出)，并经由该驱动装置控制为移动接近或远离夹送辊的辊面。该驱动装置可设置在夹送辊框架内，并安装有位移传感器，以测量并控制局部冷却梁320及其上的喷嘴330与夹送辊辊面之间的距离。The local cooling beam 320 can move closer to the surface of the pinch roller, or move away from the surface of the pinch roller. Specifically, the local cooling beam 320 is connected to a driving device (not shown) driven by hydraulic pressure, for example, and is controlled by the driving device to move closer to or away from the roller surface of the pinch roller. The driving device can be arranged in the pinch roller frame and equipped with a displacement sensor to measure and control the distance between the local cooling beam 320 and the nozzle 330 thereon and the roller surface of the pinch roller.
此外，可在夹送辊装置100的沿薄带钢前进方向A的下游(例如热轧出口处)设置有图像捕获装置和判定装置，以获得薄带钢的表面的图像、并判定薄带钢表面是否存在辊印、和/或辊印位置，进而判断生产的薄带钢是否合格。控制装置400可根据图片捕获装置和判定装置的判定结果，自动地控制冷却控制单元300的多个喷嘴330的分别的开闭状态和冷却剂流量，来对夹送辊的表面进行冷却或局部冷却，以避免形成辊印或导致产品不合格。此外，也可人工观察图片捕获装置获得的薄带钢表面的图片，并根据薄带钢表面状态手动控制冷却控制单元300的冷却参数等。In addition, an image capture device and a determination device may be provided downstream of the pinch roller device 100 along the advancing direction A of the thin strip steel (e.g., at the hot rolling exit) to obtain an image of the surface of the thin strip steel, and determine whether there is a roller mark on the surface of the thin strip steel, and/or the position of the roller mark, and then determine whether the produced thin strip steel is qualified. The control device 400 may automatically control the respective opening and closing states and coolant flow rates of the plurality of nozzles 330 of the cooling control unit 300 according to the determination results of the image capture device and the determination device, to cool or partially cool the surface of the pinch roller, so as to avoid the formation of roller marks or causing unqualified products. In addition, the image of the thin strip steel surface obtained by the image capture device may be manually observed, and the cooling parameters of the cooling control unit 300 may be manually controlled according to the surface state of the thin strip steel.
图6示出了采用了根据本发明的冷却控制装置300对夹送辊进行冷却后生产的薄带钢，其中每个局部冷却梁上设置有40个冷却喷嘴，分别编号为1～40号。根据图像捕获装置获得的薄带钢的表面状态，将薄带钢中部位置的第15-25组喷嘴设置为开启状态，其余1-14、26-40号喷嘴设置为关闭状态，夹送辊压力调节至18kN。可以看到，最终生产得到的薄带钢无明显压痕，表面状态良好，符合生产合格要求。FIG6 shows a thin strip steel produced by cooling the pinch rollers using the cooling control device 300 according to the present invention, wherein each local cooling beam is provided with 40 cooling nozzles, numbered 1 to 40 respectively. According to the surface state of the thin strip steel obtained by the image capture device, the nozzles of the 15th to 25th groups in the middle of the thin strip steel are set to the open state, and the remaining nozzles 1-14 and 26-40 are set to the closed state, and the pinch roller pressure is adjusted to 18 kN. It can be seen that the thin strip steel finally produced has no obvious indentation, the surface state is good, and meets the production qualification requirements.
在本发明的描述中，需要理解的是，术语“上”、“下”、“左”、“右”、“前”、“后”等指示的方位或位置关系为基于附图所示的方位或位置关系，或者是该公开产品使用时惯常摆放的方位或位置关系，或者是本领域技术 人员惯常理解的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的设备或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the disclosed product is usually placed when used, or are based on the technical knowledge in the art. The orientation or positional relationship commonly understood by personnel is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.
以上对结合附图提供的本公开的实施例的详细描述并非旨在限制要求保护的本公开的范围，而是仅仅表示本公开的选定实施例。并且，附图仅仅用于示意性示出本发明所涉及的各个部件，其尺寸、比例等并非用于实际限定各个部件的真实比例关系。The detailed description of the embodiments of the present disclosure provided in conjunction with the accompanying drawings is not intended to limit the scope of the present disclosure claimed for protection, but merely represents selected embodiments of the present disclosure. Moreover, the accompanying drawings are only used to schematically illustrate the various components involved in the present invention, and their sizes, proportions, etc. are not used to actually define the true proportional relationship of the various components.
以上所述仅是本发明的具体实施方式，应该指出，对于本技术领域的普通技术人员来说，不在脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明保护的范围。 The above description is only a specific implementation of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims (10)

  1. 一种改善薄带钢表面夹送辊辊印的装置，其特征在于，所述装置包括：A device for improving the roller marks of pinch rollers on the surface of thin strip steel, characterized in that the device comprises:
    夹送辊装置(100)，包括形成为凸形辊的上夹送辊(110A)和下夹送辊(110B)，所述上夹送辊(110A)和下夹送辊(110B)在薄带钢(200)上施加压力并将所述薄带钢(200)夹持于其间，所述上夹送辊(110A)和所述下夹送辊(110B)绕相反方向旋转、以引导所述薄带钢(200)沿薄带钢前进方向(A)行进，A pinch roller device (100) comprises an upper pinch roller (110A) and a lower pinch roller (110B) formed as convex rollers, wherein the upper pinch roller (110A) and the lower pinch roller (110B) apply pressure to a thin steel strip (200) and clamp the thin steel strip (200) therebetween, and wherein the upper pinch roller (110A) and the lower pinch roller (110B) rotate in opposite directions to guide the thin steel strip (200) to travel in a thin steel strip advancing direction (A).
    冷却控制装置(300)，设置在所述夹送辊装置(100)的上游或下游，其包括：主输送管道(310)，用于输送冷却剂；局部冷却梁(320)，从所述主输送管道(310)延伸至所述上夹送辊(110A)和/或下夹送辊(110B)的冷却部位；冷却喷嘴(330)，设置在所述局部冷却梁(320)的面向所述夹送辊装置(100)的一侧上，用于将冷却剂喷洒至所述冷却部位；以及电磁阀，用于控制所述冷却喷嘴(330)的开关和冷却剂流量。A cooling control device (300) is arranged upstream or downstream of the pinch roller device (100), and comprises: a main conveying pipeline (310) for conveying coolant; a local cooling beam (320) extending from the main conveying pipeline (310) to the cooling part of the upper pinch roller (110A) and/or the lower pinch roller (110B); a cooling nozzle (330) arranged on a side of the local cooling beam (320) facing the pinch roller device (100) and used to spray the coolant to the cooling part; and a solenoid valve for controlling the switch of the cooling nozzle (330) and the coolant flow rate.
  2. 根据权利要求1所述的装置，其特征在于，The device according to claim 1, characterized in that
    所述局部冷却梁(320)的面向所述夹送辊装置(100)的一侧上布置有两排喷嘴(330)，每排喷嘴包括喷嘴数量在35～40个的范围内，且每排喷嘴的相邻喷嘴间的间隔(GL)为1～20mm的范围内，以及Two rows of nozzles (330) are arranged on one side of the local cooling beam (320) facing the pinch roller device (100), each row of nozzles includes 35 to 40 nozzles, and the interval (GL) between adjacent nozzles in each row of nozzles is in the range of 1 to 20 mm, and
    所述冷却控制装置(300)的多个所述喷嘴(330)的每个可经由电磁阀单独控制其开关和冷却剂流量，并冷却所述上夹送辊(110A)或下夹送辊(110B)上的对应局部辊面。Each of the plurality of nozzles (330) of the cooling control device (300) can individually control its switch and coolant flow rate via a solenoid valve, and cool the corresponding local roller surface on the upper pinch roller (110A) or the lower pinch roller (110B).
  3. 根据权利要求1所述的装置，其特征在于，The device according to claim 1, characterized in that
    所述冷却剂为液氮。The coolant is liquid nitrogen.
  4. 根据权利要求1所述的装置，其特征在于，The device according to claim 1, characterized in that
    所述上夹送辊(110A)和所述下夹送辊(110B)中至少一个连接至位移装置，所述位移装置能够调节所述上夹送辊(110A)和所述下夹送辊(110B)中所述至少一个的位置，以调节所述上夹送辊(110A)和所述下 夹送辊(110B)之间的间隙，所述间隙设置为在0.6mm～2.0mm的范围内可调，并且At least one of the upper pinch roller (110A) and the lower pinch roller (110B) is connected to a displacement device, and the displacement device is capable of adjusting the position of at least one of the upper pinch roller (110A) and the lower pinch roller (110B) to adjust the position of the upper pinch roller (110A) and the lower pinch roller (110B). The gap between the pinch rollers (110B) is adjustable within a range of 0.6 mm to 2.0 mm, and
    所述上夹送辊(110A)和所述下夹送辊(110B)施加于所述薄带钢(200)的压力是可调的，并且所述压力设置在10-25kN的范围内。The pressure applied by the upper pinch roller (110A) and the lower pinch roller (110B) to the thin steel strip (200) is adjustable, and the pressure is set within the range of 10-25 kN.
  5. 根据权利要求1所述的装置，其特征在于，The device according to claim 1, characterized in that
    所述局部冷却梁(320)连接至驱动装置，并能够经由所述驱动装置驱动靠近或远离所述夹送辊装置(100)，The local cooling beam (320) is connected to a driving device and can be driven to approach or move away from the pinch roller device (100) via the driving device.
    所述驱动装置还包括位移传感器，用于测量局部冷却梁与夹送辊(110A，110B)的辊面之间的距离。The driving device also includes a displacement sensor for measuring the distance between the local cooling beam and the roller surface of the pinch rollers (110A, 110B).
  6. 根据权利要求5所述的装置，其特征在于，所述驱动装置为液压驱动，用于驱动所述局部冷却梁移动靠近或远离夹送辊(110A，110B)的辊面。The device according to claim 5 is characterized in that the driving device is a hydraulic drive, which is used to drive the local cooling beam to move closer to or away from the roller surface of the pinch roller (110A, 110B).
  7. 根据权利要求1所述的装置，其特征在于，所述夹送辊装置(100)的沿薄带钢前进方向(A)的下游设置有图像捕获装置，用于获得薄带钢表面的图像。The device according to claim 1 is characterized in that an image capturing device is provided downstream of the pinch roller device (100) along the advancing direction (A) of the thin strip steel, for obtaining an image of the surface of the thin strip steel.
  8. 根据权利要求7所述的装置，其特征在于，所述夹送辊装置(100)还包括判定装置，用于根据所述图像捕获装置获得的薄带钢表面的图像、来判定所述薄带钢的表面是否存在辊印和/或辊印位置，并且The device according to claim 7 is characterized in that the pinch roller device (100) further comprises a determination device for determining whether there is a roller mark and/or the roller mark position on the surface of the thin steel strip based on the image of the thin steel strip surface obtained by the image capture device, and
    所述装置还包括控制装置(400)，所述控制装置(400)根据所述判定装置的判定结果，控制所述冷却控制单元(300)的多个喷嘴(330)的分别的开闭状态和冷却剂流量，来对所述上夹送辊(110A)和/或下夹送辊(110B)的表面进行冷却。The device also includes a control device (400), which controls the opening and closing states and coolant flow rates of the multiple nozzles (330) of the cooling control unit (300) according to the determination result of the determination device to cool the surface of the upper pinch roller (110A) and/or the lower pinch roller (110B).
  9. 根据权利要求1所述的装置，其特征在于，The device according to claim 1, characterized in that
    所述薄带钢的厚度为2.0mm以下。The thickness of the thin steel strip is less than 2.0 mm.
  10. 一种采用根据权利要求1-9所述的装置改善在双辊薄带铸轧生产过程中生产的薄带钢表面夹送辊辊印的方法。 A method for improving the pinch roll marks on the surface of thin strip steel produced in a twin-roller thin strip casting and rolling production process using the device according to claims 1-9.
PCT/CN2023/111280 2022-09-27 2023-08-04 Device and method for ameliorating roller marks formed on surface of thin strip steel by pinch rollers WO2024066741A1 (en)

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