KR100887863B1 - Control System Device of Warping in Matter for Rolling Mill for controling of the same - Google Patents

Control System Device of Warping in Matter for Rolling Mill for controling of the same Download PDF

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KR100887863B1
KR100887863B1 KR1020060136964A KR20060136964A KR100887863B1 KR 100887863 B1 KR100887863 B1 KR 100887863B1 KR 1020060136964 A KR1020060136964 A KR 1020060136964A KR 20060136964 A KR20060136964 A KR 20060136964A KR 100887863 B1 KR100887863 B1 KR 100887863B1
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South Korea
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rolled material
rolling
oil
nozzle
warping
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KR1020060136964A
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Korean (ko)
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KR20080061835A (en
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홍완기
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주식회사 포스코
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    • 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
    • B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
    • B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
    • 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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/46—Roll speed or drive motor control
    • 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
    • B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
    • 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
    • B21B45/002—Increasing friction between work and working rolls by using friction increasing substance

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

본 발명은 압연소재의 워핑현상을 제어하는 제어시스템 장치로서, 압연소재를 압연기가 통과할 때 상향 또는 하향되는 워핑(Warping)현상이 발생하는 문제를 해결하기 위하여, 특정방식으로 제어되는 주제어기에 의해 상부 압연롤과 하부 압연롤에 배타적으로 오일을 분사시킴으로써 압연소재와 각 압연롤 사이의 마찰계수를 다르게 하여 워핑현상을 제어하는 것을 특징으로 한다.  The present invention is a control system device for controlling the warping phenomenon of the rolled material, in order to solve the problem that the warping phenomenon is raised up or down when the rolling material passes through the rolling mill, by a main controller controlled in a specific manner By spraying oil exclusively on the upper and lower rolling rolls, the warping phenomenon is controlled by varying the coefficient of friction between the rolled material and each rolling roll.

압연소재, 압연기, 워핑, 제어 Rolled Material, Rolling Mill, Warping, Control

Description

압연소재의 워핑 제어시스템 장치 및 그의 제어방법{Control System Device of Warping in Matter for Rolling Mill for controling of the same}Warping control system device for rolling materials and control method thereof {Control System Device of Warping in Matter for Rolling Mill for controling of the same}

도 1a, 및 도 1b는 일반적인 압연소재의 워핑현상을 설명하는 설명도. 1A and 1B are explanatory views illustrating warping phenomenon of a general rolled material.

도 2는 본 발명의 일실시예에 따른 압연소재의 워핑 제어시스템 장치의 개념도.2 is a conceptual diagram of a warping control system device of a rolled material according to an embodiment of the present invention.

도 3은 본 발명의 일실시예에 따른 압연소재의 워핑 제어시스템 장치의 블럭도.Figure 3 is a block diagram of a warping control system device of a rolled material according to an embodiment of the present invention.

도 4는 본 발명의 일실시예에 따른 압연소재의 워핑 제어시스템 장치의 제어방법에 대한 순서도. Figure 4 is a flow chart for the control method of the warping control system device of a rolled material according to an embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

100 :압연기 110 : 상부압연롤 100: rolling mill 110: upper rolling roll

120 : 하부압연롤 124, 125 : 윤활장치 120: lower rolling rolls 124, 125: lubrication device

130 : 테이블롤러 200 : 압연소재 130: table roller 200: rolled material

310 : 주제어기 320 : 오일제어기 310: main controller 320: oil controller

331 : 상부오일분사노즐 332 : 하부 오일분사노즐 331: upper oil spray nozzle 332: lower oil spray nozzle

350 : 롤러회전속도 측정센서 355 : HMD 350: Roller rotation speed measuring sensor 355: HMD

361 : 상부 온도계 362 : 하부온도계361: upper thermometer 362: lower thermometer

본 발명은 압연공정시 압연소재의 굽힘(Warping)을 방지하는 제어시스템 장치 및 그의 제어방법에 관한 것이다. The present invention relates to a control system device for preventing warping of a rolled material during the rolling process and a control method thereof.

압연소재를 원하는 두께의 코일로 만들기 위해 열간 압연기를 이용함에 있어서, 압연 롤은 고온의 압연소재(스트립)과 접촉하면서 압연작업을 한다. 이 때 압연소재는 두께가 다르게 입력되므로 매번 패스라인(pass line)의 변동요인이 발생하게 된다. In using a hot rolling mill to make a rolled material into a coil of a desired thickness, the rolled roll is rolled in contact with a hot rolled material (strip). At this time, since the rolled material has a different thickness, a change factor of a pass line occurs every time.

또한, 가열로에서 압연소재를 가열한 후 압연공정이 연속적으로 이루어지며 롤러 테이블을 타고 이송되기 때문에 소재의 상부와 하부의 냉각정도가 다르게 나타날 수 밖에 없다. 따라서, 압연소재가 압연기에 치입후 소성변형을 할 때 상하부가 다르게 변형되어, 소재의 비대칭 현상이 발생할 수 있다. 또한, 압연소재의 비대칭현상은 압연소재를 압연할 때 압연 롤의 상, 하부 냉각 불균일에 의해서도 발생할 수 있다. In addition, after the rolling material is heated in the heating furnace, the rolling process is continuously performed, and thus the degree of cooling of the upper and lower parts of the material may be different because the rolling process is carried out. Therefore, when the rolled material is subjected to plastic deformation after entering the rolling mill, the upper and lower parts are deformed differently, and thus asymmetry of the material may occur. In addition, the asymmetry of the rolled material may also be caused by the upper and lower cooling unevenness of the rolling roll when rolling the rolled material.

특히 고강도의 압연소재일 경우, 선단부와 미단부에서 이러한 요인들은 압연소재의 상, 하향을 크게 유발할 수 있다(Warping 현상). 도 1a, 및 도 1b는 각각 압연소재(3)가 상, 하향되는 상태를 도시한 것이다. 1, 2는 각각 압연롤이다.Especially in the case of high-strength rolled material, these factors at the leading end and the trailing end can cause a large up and down of the rolled material (warping phenomenon). 1A and 1B illustrate a state in which the rolled material 3 is upward and downward, respectively. 1 and 2 are rolling rolls, respectively.

또한, 압연소재가 다운스트림(down stream)의 압연기에 치입될 때, 원할히 치입되지 못하게 하는 요인으로 작용하게 되어, 설비의 이상동작이나 긴급정지 상황을 유발하여 생산성 하락에 큰 영향을 미치고 있다. In addition, when the rolled material is inserted into the rolling mill downstream, it acts as a factor that prevents it from entering smoothly, causing abnormal operation or emergency stop of the equipment has a great impact on the productivity decrease.

한편 이러한 문제점을 해결하기 위한 방안으로써, 대한민국 특허공개공보 제 10-1996-0021211에는 압연소재의 소재정보 및 압연정보로부터 상, 하향이 얼마나 발생할 것인지를 미리 예측하고, 이 양을 압연기의 상, 하부의 롤 속도변화로 환산하여 미리 압연기의 상 하부속도를 다르게 제어하므로써 압연 후, 판의 상, 하향을 조절하는 기술이 개시되어 있다. On the other hand, as a way to solve this problem, Korean Patent Publication No. 10-1996-0021211 predicts in advance how much up and down will occur from the material information and rolling information of the rolled material, and the amount of the upper and lower parts of the rolling mill The technique for controlling the up and down of a plate after rolling by controlling the upper and lower speeds of the rolling mill differently in advance in terms of the change in the roll speed is disclosed.

그러나, 이 경우 상부롤과 하부롤에 압연소재가 물려있는 상황이므로 각 롤에 서로 다른 주속을 인가한다 해도, 실제 워핑(Warping)현상을 방지하기는 어렵다. However, in this case, since the rolled material is in the upper roll and the lower roll, even if a different circumferential speed is applied to each roll, it is difficult to prevent the warping phenomenon.

본 발명은 상기한 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 압연공정에서 압연롤과 압연소재에 윤활을 통한 마찰계수를 조정하여 상하부의 비대칭성 유발인자를 제거하여 압연소재가 굽어지는 것을 방지하는 제어시스템 장치 및 그의 제어방법을 제공하는 데 있다.The present invention has been made to solve the above problems, an object of the present invention is to adjust the friction coefficient through the lubrication of the rolling roll and the rolling material in the rolling process to remove the asymmetry inducing factor of the upper and lower parts to bend the rolled material The present invention provides a control system device and a control method thereof for preventing the same.

본 발명의 일실시예에 따른 압연소재의 워핑현상을 제어하는 제어시스템 장치는 압연소재의 두께, 패스라인의 높이(롤러테이블에서 상부롤 및 하부롤 간격의 중간지점까지의 거리), 압연소재의 압연후의 두께, 그리고 압연기 입측에서의 상하부 온도를 입력받아, 수학식Control system device for controlling the warping phenomenon of the rolled material according to an embodiment of the present invention is the thickness of the rolled material, the height of the pass line (distance from the roller table to the middle of the gap between the upper roll and the lower roll), The thickness after rolling and the temperature of the upper and lower parts at the entrance side of the rolling mill are inputted.

Figure 112006097893309-pat00001
Figure 112006097893309-pat00001

에 따라 분사노즐을 선택하고 분사시간을 설정하는 주제어기; A main controller for selecting the spray nozzle and setting the spraying time according to the control unit;

(이 때, t(s)는 오일노즐 분사시간이고, 분사노즐은 t의 부호에 의해 결정되는데, t>0이면, 상부오일노즐이 분사되고, t<0이면, 하부오일노즐이 분사된다. (At this time, t (s) is the oil nozzle injection time, and the injection nozzle is determined by the sign of t. If t> 0, the upper oil nozzle is injected, and if t <0, the lower oil nozzle is injected.

△T(℃)는 상하부 온도차를 나타내고, Tave (℃)는 상하부 온도평균을 나타내고, △H(℃)는 상하부 온도평균(0.5*(Ttop - Tbottom))을 나타내고, △Hp(mm)는 패스라인과 소재중심과의 높이차(Hp-0.5H), Hp(mm)는 패스라인의 높이, H(mm)는 압연소재의 두께, △H(mm)는 압연량(H-h), h는 압연후의 소재의 두께, α, β, γ는 모델 튜닝(tuning) 계수, K(1/s)는 워프(Warp) 튜닝(Tuning)계수를 나타낸다.)ΔT (° C.) represents the upper and lower temperature differences, and T ave (° C) represents the upper and lower temperature averages, ΔH (° C) represents the upper and lower temperature averages (0.5 * (T top -T bottom )), and ΔHp (mm) represents the height difference (Hp) between the pass line and the material center. -0.5H), Hp (mm) is the height of the pass line, H (mm) is the thickness of the rolled material, ΔH (mm) is the rolling amount (Hh), h is the thickness of the material after rolling, α, β, γ Is the model tuning coefficient, and K (1 / s) is the warp tuning coefficient.)

상기 주제어기로부터의 분사노즐 및 분사시간 신호에 따라 오일분사를 제어하는 오일제어기;An oil controller for controlling oil injection according to the injection nozzle and the injection time signal from the main controller;

상기 오일제어기의 신호에 따라 서로 배타적으로 선택되어, 압연소재에 오일을 정해진 시간동안 분사하는 상부 및 하부 오일분사노즐;Upper and lower oil spray nozzles selected exclusively from each other according to the signal of the oil controller, for spraying oil to the rolled material for a predetermined time;

압연기의 후단에 위치하고, 카메라를 포함하여 구성되어 압연소재의 상하향을 측정하여 이를 주제어기로 피드백하는 워프(Warp)검출센서를 포함하는 것을 특징으로 한다. Located at the rear end of the rolling mill, it comprises a camera, characterized in that it comprises a warp (Warp) detection sensor for measuring the vertical direction of the rolled material and feeds it back to the main controller.

상기 주제어기에 압연소재의 위치정보를 전달하는 위치센서를 더 구비하여 상기 오일분사노즐의 분사시점을 결정하는 것이 바람직하다. It is preferable to further include a position sensor for transmitting the position information of the rolled material to the main controller to determine the injection time of the oil spray nozzle.

또한, 상기 위치센서는 압연소재를 이송하는 구동모터에 부착되는 테이블 롤러의 회전속도 측정센서 및, 압연소재의 이동 구간별로 설치된 HMD(Hot Metal Detector)를 포함하는 것이 바람직하다. In addition, the position sensor preferably includes a rotational speed measuring sensor of the table roller attached to the drive motor for transporting the rolled material, and HMD (Hot Metal Detector) installed for each moving section of the rolled material.

또한 본 발명의 다른 측면은, 압연소재의 워핑 제어시스템 장치의 제어방법으로서, 위치센서에서 압연소재에 대한 압연소재에 대한 위치정보를 트래킹(tracking)하는 단계; 상기 압연소재 위치 측정단계에서 얻어진 신호정보로 노즐분사시점을 선택하고, 압연소재의 두께, 패스라인의 높이, 압연되는 양(두께), 및 압연기 상하부 입측의 상하부 온도를 이용하여 주제어기에서 상하부 노즐의 분사노즐 및 시간을 선정하는 단계; 주제어기로부터 지령받은 분사시점, 분사노즐 및 분사시간에 따라 오일제어기가 선택된 노즐을 제어하여 실제 오일을 분사하는 단계; 및 압연기를 통과한 압연소재의 워프상태를 워핑검출센서로 측정하여 주제어기로 입력하는 단계를 포함하여 구성될 수 있다. In addition, another aspect of the present invention, a method for controlling a warping control system device of a rolled material, comprising the steps of: tracking the position information of the rolled material for the rolled material in the position sensor; The nozzle injection time point is selected as the signal information obtained in the rolling material position measuring step, and the upper and lower nozzles are controlled by the main controller using the thickness of the rolled material, the height of the pass line, the amount of rolling (thickness), and the upper and lower temperatures of the upper and lower sides of the rolling mill. Selecting a spray nozzle and time; Spraying the actual oil by controlling the selected nozzle by the oil controller according to the injection time, the injection nozzle and the injection time commanded from the main controller; And it may be configured to include the step of measuring the warp state of the rolled material passed through the rolling mill with a warping detection sensor to enter the main controller.

이하에서는 도면을 참조하면서, 본 발명의 실시예를 보다 상세히 설명한다. 도 2는 본 발명의 일실시예에 따른 압연소재의 워핑 제어시스템 장치의 개념도이고, 도 3은 본 발명의 일실시예에 따른 압연소재의 워핑 제어시스템 장치의 블럭도이다.Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 2 is a conceptual diagram of a warping control system device for a rolled material according to an embodiment of the present invention, Figure 3 is a block diagram of a warping control system device for a rolled material according to an embodiment of the present invention.

먼저, 워핑 제어시스템 장치가 적용되는 압연기에 대해 간략히 설명한다. 압연기(100; 110, 120, 130)는 상부 압연롤(110), 하부압연롤(120), 및 테이블롤러(130)를 포함하여 구성된다. 이 때, 압연소재(200)는 상부압연롤(120)과 하부압연롤(130) 사이를 통과하여 압연되며, 압연소재(200)는 테이블롤러(130)의 회전에 의해 이동된다. 본 도면에서 압연기는 설명의 용이성을 위해 하나의 한쌍의 롤러로 구성되어 있으나, 이에 한정되지 않음을 당업자는 주지할 것이다.First, the rolling mill to which the warping control system device is applied will be briefly described. The rolling mill 100 includes the upper rolling roll 110, the lower rolling roll 120, and the table roller 130. At this time, the rolled material 200 is rolled through the upper rolling roll 120 and the lower rolling roll 130, the rolled material 200 is moved by the rotation of the table roller 130. In this figure, the rolling mill is composed of a pair of rollers for ease of description, but it will be appreciated by those skilled in the art.

이 때, 압연기(100) 주변의 일측에는 상하부압연롤에 각각 윤활제를 도포하는 윤활장치(124, 125)가 구비된다. 압연롤에 윤활제를 일정하게 도포함으로써, 우수한 품질의 압연재가 얻어질 수 있다. At this time, one side around the rolling mill 100 is provided with lubrication devices (124, 125) for applying a lubricant to the upper and lower rolling rolls, respectively. By constantly applying a lubricant to the rolling rolls, a rolled material of good quality can be obtained.

본 발명의 실시예에 따른 압연소재의 워핑제어시스템 장치는 전술한 압연기에 구비된다. 압연소재(200)의 워핑 제어시스템 장치는 주제어기(310), 오일제어기(320), 상하부 오일분사노즐(331, 332), 웝(Warp)검출센서(340), 및 각종 센서(350, 355, 361, 362)를 포함하여 구성된다. Warping control system apparatus for a rolled material according to an embodiment of the present invention is provided in the above-described rolling mill. The warping control system of the rolled material 200 includes a main controller 310, an oil controller 320, upper and lower oil spray nozzles 331 and 332, warp detection sensors 340, and various sensors 350 and 355. , 361, 362.

주제어기(310)는 각종 센서 및 입력으로부터 신호를 전달받아, 오일분사 시간, 및 분사노즐을 예측하여, 해당 오일분사노즐에 신호를 송신한다. 본 실시예에서 단위시간당 분사되는 오일량은 일정한 것으로 설정하나, 이에 제한되는 것은 아니다. The main controller 310 receives signals from various sensors and inputs, predicts oil injection time and injection nozzles, and transmits signals to the corresponding oil injection nozzles. In this embodiment, the amount of oil injected per unit time is set to a constant, but is not limited thereto.

이 때, 주제어기(310)에 전달되는 정보는 다양하게 구성된다. 분사노즐 및 분사시간을 선택하기 위해 입력되는 정보로서, 압연소재의 두께, 패스라인의 높이(롤러테이블에서 상부롤 및 하부롤 간격의 중간지점까지의 거리), 압연소재(200)의 압연후의 두께, 그리고 압연기 입측에서의 상하부 온도등이 있다. 압연기(100) 입측에서의 상하부 온도는 상하부 온도계(361, 362)에 의해 측정된다. At this time, the information transmitted to the main controller 310 is configured in various ways. The information input to select the injection nozzle and the injection time, the thickness of the rolled material, the height of the pass line (distance from the roller table to the intermediate point between the upper roll and the lower roll), the thickness after rolling of the rolled material 200 And upper and lower temperatures at the inlet side of the rolling mill. The upper and lower temperatures at the entrance side of the rolling mill 100 are measured by the upper and lower thermometers 361 and 362.

또한, 분사노즐(331, 332)의 분사시점을 위해 측정되는 정보로서 테이블 롤러 회전속도, 압연소재의 위치등이 있다. 이 때, 테이블 롤러의 회전속도는 압연소재를 이송하는 구동모터에 부착되는 롤러회전속도 측정센서(350)로부터 인가받고, 압연소재(200)의 위치는 압연소재(200)의 이동 구간별로 설치된 HMD(Hot Metal Detector;355)로부터 인가받는다. HMD(355)는 소정온도 이상의 물체가 측정될 경우 ON 또는 OFF되는 장치이다.In addition, the information measured for the injection timing of the injection nozzles (331, 332) is a table roller rotational speed, the position of the rolled material and the like. At this time, the rotational speed of the table roller is applied from the roller rotational speed measuring sensor 350 attached to the drive motor for transporting the rolled material, the position of the rolled material 200 is HMD installed for each moving section of the rolled material 200 (Hot Metal Detector; 355). The HMD 355 is a device that is turned on or off when an object above a predetermined temperature is measured.

주제어기(310)에서 예측되는 오일분사 시간, 및 노즐은 다음 수학식 1에 의해 표시된다. 수학식 1은 압연기(100) 입측에서 측정되는 압연소재(200)의 상, 하향 온도차이를 평균 온도로 무차원화하고, 소재 두께와 Pass Line 높이 차이를 소재두께로, 소재 압연량을 소재 두께로 각각 무차원화한 변수들의 조합으로 형성하였다.The oil injection time predicted in the main controller 310 and the nozzle are represented by the following equation (1). Equation 1 is a dimensionless phase and downward temperature difference of the rolling material 200 measured at the entrance of the rolling mill 100 to the average temperature, the difference between the material thickness and the pass line height as the material thickness, the material rolling amount to the material thickness Each was formed as a combination of non-dimensionalized variables.

Figure 112006097893309-pat00002
Figure 112006097893309-pat00002

이 때, t(s)는 오일노즐 분사시간이고, 분사노즐은 t의 부호에 의해 결정되는데, t>0이면, 상부오일노즐이 분사되고, t<0이면, 하부오일노즐이 분사된다. At this time, t (s) is the oil nozzle injection time, the injection nozzle is determined by the sign of t, if t> 0, the upper oil nozzle is injected, if t <0, the lower oil nozzle is injected.

△T(℃)는 상하부 온도차를 나타내고, Tave (℃)는 상하부 온도평균을 나타내고, △Hp(mm)는 패스라인과 소재중심과의 높이차(Hp-0.5H), Hp(mm)는 패스라인의 높이, H(mm)는 소재의 두께, △H(mm)는 압연량(H-h), h는 압연후의 소재의 두께, α, β, γ는 모델 튜닝(tuning) 계수, K(1/s)는 워프(Warp) 튜닝(Tuning)계수를 나타낸다. ΔT (° C) represents the upper and lower temperature differences, T ave (° C) represents the upper and lower temperature averages, and ΔHp (mm) represents the height difference between the pass line and the material center (Hp-0.5H) and Hp (mm) The height of the pass line, H (mm) is the thickness of the material, ΔH (mm) is the rolling amount (Hh), h is the thickness of the material after rolling, α, β, γ is the model tuning coefficient, K (1 / s) represents the warp tuning coefficient.

오일제어기(320)는 주제어기(310)로부터 분사시간 및 분사노즐에 대한 신호를 인가받아 상하부의 오일분사노즐(331, 332)을 제어한다. The oil controller 320 receives the signal for the injection time and the injection nozzle from the main controller 310 to control the oil injection nozzles 331 and 332 of the upper and lower parts.

상하부 오일분사노즐(331, 332)은 각각 상부 압연롤(110) 및 하부 압연롤(120)에 마찰계수를 조절하기 위해 구비된다. 즉, 압연소재(200) 선단부의 상향이 예상될 경우에는 상부압연롤(110) 측에 있는 상부 오일분사노즐(331)을 개방하여 상부압연롤(110)에 오일을 분사하고, 하부압연롤측(120)에 있는 하부 오일분사노즐(125)을 차단한다. 또한, 압연소재(200) 선단부의 하향이 예상될 경우에는 하부압연롤(120)측에 있는 하부 오일분사노즐(332)을 개방하고 상부압연롤(110)측에 있는 상부 오일분사노즐(331)을 차단한다. 이로써, 압연롤과 압연소재 사이의 마찰계수가 상, 하부 압연롤(110, 120)에 다르게 작용하여 압연소재의 워프현상을 방지할 수 있게 된다.Upper and lower oil spray nozzles 331 and 332 are provided to adjust friction coefficients of the upper rolling roll 110 and the lower rolling roll 120, respectively. That is, when the top of the rolled material 200 is expected to be upward, the upper oil spray nozzle 331 on the upper rolling roll 110 is opened to spray oil on the upper rolling roll 110, and the lower rolling roll side ( Block the lower oil spray nozzle 125 in 120). In addition, when the downward direction of the tip of the rolled material 200 is expected, the lower oil spray nozzle 332 on the lower rolling roll 120 side is opened and the upper oil spray nozzle 331 on the upper rolling roll 110 side. To block. As a result, the friction coefficient between the rolling roll and the rolled material may be differently applied to the upper and lower rolling rolls 110 and 120 to prevent warping of the rolled material.

워프(Warp)검출센서(340)는 압연기의 후단에 위치하고, 카메라를 포함하여 구성되어 압연소재의 상하향을 측정하여 이를 주제어기(310)로 피드백한다. 주제어기(310)는 이후 워프검출센서로(340)부터 입력된 값으로, 오차를 보정하고, 분사예측 모델의 수학식에서 K를 학습시켜 정밀도를 향상시키며, 다음 압연기 패스 시에 상, 하향 값을 개선한다.The warp detection sensor 340 is located at the rear end of the rolling mill, and includes a camera to measure the vertical direction of the rolled material and feed it back to the main controller 310. The main controller 310 is a value input from the warp detection sensor 340 afterwards, and corrects an error, improves precision by learning K in the equation of the injection prediction model, and increases the up and down values at the next rolling mill pass. Improve.

다음에는 도 4를 참조하면서 본 발명의 일실시예에 따른 압연소재의 워핑 제어시스템 장치의 제어방법에 대해 설명한다. 이에 따르면, 워핑제어시스템 장치는 압연소재 위치 추적단계, 오일분사노즐 및 시간을 설정하는 단계, 오일을 분사하는 단계, 및 오일 분사결과를 피드백하는 단계를 포함하는 장치로 구성된다.Next, a control method of a warping control system apparatus for a rolled material according to an embodiment of the present invention will be described with reference to FIG. 4. According to this, the warping control system device is composed of a device including a rolling material position tracking step, setting the oil spray nozzle and time, spraying oil, and feeding back the oil spraying results.

먼저, 압연소재 정보 추적단계는 각종 센서에서 압연소재에 대한 압연소재에 대한 위치정보를 트래킹(tracking)하는 단계이다.(ST100)First, the rolling material information tracking step is a step of tracking the position information of the rolling material for the rolled material in various sensors (ST100).

위치정보는 압연소재의 이동속도는 압연소재를 이송하는 구동모터에 부착되는 롤러회전속도 측정센서로부터 인가받고, 압연소재의 위치는 압연소재의 이동 구간별로 설치된 HMD(Hot Metal Detector)로부터 인가받는다. Position information is applied to the moving speed of the rolled material from the roller rotational speed sensor attached to the drive motor for transporting the rolled material, the position of the rolled material is applied from the HMD (Hot Metal Detector) installed for each moving section of the rolled material.

다음으로, 오일분사노즐 및 시간을 설정하는 단계는 압연소재 위치 측정단계에서 얻어진 신호정보로 노즐분사시점을 선택하고, 압연소재에 대해 입력되는 정보즉, 압연소재의 두께(H), 패스라인의 높이(롤러테이블에서 상부롤 및 하부롤 간격의 중간지점까지의 거리; Hp), 압연소재의 압연후의 두께(h), 그리고 압연기 입측에서의 상하부 온도를 바탕으로 전술한 수학식 1에 따라 주제어기에서 상하부 노즐의 분사노즐 및 시간을 선정하는 단계이다.(ST200) Next, the step of setting the oil spray nozzle and time is to select the nozzle spraying time point with the signal information obtained in the rolling material position measurement step, the information input for the rolled material, that is, the thickness of the rolled material (H), the pass line Based on the height (distance from the roller table to the middle point between the upper and lower rolls; Hp), the thickness after rolling of the rolled material (h), and the upper and lower temperatures at the inlet side of the rolling mill, This step is to select injection nozzle and time of upper and lower nozzle. (ST200)

다음으로, 오일을 분사하는 단계는 주제어기로부터 지령받은 분사노즐 및 시간에 따라 오일제어기가 노즐을 제어하여 실제 오일을 분사하는 단계이다.(ST300)Next, the step of injecting oil is a step of injecting the actual oil by controlling the nozzle by the oil controller according to the injection nozzle and time commanded from the main controller. (ST300)

위프측정결과를 피드백하는 단계는 워프검출센서가 압연소재의 워프상태를 측정하여 주제어기로 입력하며, 주제어기는 이를 입력받아 분사예측 모델의 수학식에서 K를 학습하게 되는 단계이다.(ST400) The step of feeding back the whip measurement result is a step in which the warp detection sensor measures the warp state of the rolled material and inputs it into the main controller, which receives the input and learns K in the equation of the injection prediction model.

본 발명은 상기 실시예들을 기준으로 주로 설명되어졌으나, 발명의 요지와 범위를 벗어나지 않고 많은 다른 가능한 수정과 변형이 이루어질 수 있다. 예컨데, 상하부 오일분사노즐의 개수, 위치, 형상의 변경등이 그러할 것이다. Although the present invention has been described primarily with reference to the above embodiments, many other possible modifications and variations can be made without departing from the spirit and scope of the invention. For example, the number, position, and shape of the upper and lower oil spray nozzles may be changed.

본 발명에 압연소재의 워프 제어시스템 장치는 상, 하부 압연롤에 오일분사를 달리함으로써, 압연소재의 상대속도 변화에 따른 압연롤 표면의 마모발생 저감 및 에너지 소모를 저감하는 효과가 있다. 또한, 압연조건 및 소재조건에 따른 압연소재의 상, 하향 발생에 대응함으로써, 후 공정에서 조업정지가 발생되지 않아 생산성이 향상되는 효과가 있다. The warp control system apparatus of the rolled material according to the present invention has an effect of reducing the occurrence of wear and energy consumption of the surface of the rolled roll according to the change of the relative speed of the rolled material by varying the oil spray on the upper and lower rolling rolls. In addition, by responding to the occurrence of the top and bottom of the rolled material according to the rolling conditions and material conditions, there is an effect that productivity does not increase because no operation stop occurs in the subsequent process.

전술한 발명에 대한 권리범위는 이하의 청구범위에서 정해지는 것으로써, 명세서 본문의 기재에 구속되지 않으며, 청구범위의 균등범위에 속하는 변형과 변경은 모두 본 발명의 범위에 속할 것이다. The scope of the above-described invention is defined in the following claims, and is not bound by the description in the text of the specification, all modifications and variations belonging to the equivalent scope of the claims will fall within the scope of the present invention.

Claims (4)

압연소재의 워핑현상을 제어하는 제어시스템 장치로서, As a control system device that controls the warping phenomenon of rolled materials, 상기 압연소재의 두께, 패스라인의 높이, 압연소재의 압연 후의 두께, 그리고 압연기 입측에서의 상하부 온도를 입력받아, 하기 수학식 1에 따라 분사노즐을 선택하고 분사시간을 설정하는 주제어기;A main controller that receives the thickness of the rolled material, the height of the pass line, the thickness after rolling of the rolled material, and the upper and lower temperatures at the inlet of the rolling mill, and selects the spray nozzle and sets the spraying time according to Equation 1 below; (수학식 1)(Equation 1)
Figure 112008059303664-pat00003
Figure 112008059303664-pat00003
 (이 때, t(s)는 오일노즐 분사시간이고, 분사노즐은 t의 부호에 의해 결정되는데, t>0이면, 상부오일노즐이 분사되고, t<0이면, 하부오일노즐이 분사된다. (At this time, t (s) is the oil nozzle injection time, and the injection nozzle is determined by the sign of t. If t> 0, the upper oil nozzle is injected, and if t <0, the lower oil nozzle is injected. △T(℃)는 상하부 온도차를 나타내고, Tave (℃)는 상하부 온도평균을 나타내고, △Hp(mm)는 패스라인과 소재중심과의 높이차(Hp-0.5H), Hp(mm)는 패스라인의 높이, H(mm)는 압연소재의 두께, △H(mm)는 압연량(H-h), h는 압연후의 소재의 두께, α, β, γ는 모델 튜닝(tuning) 계수, K(1/s)는 워프(Warp) 튜닝(Tuning)계수를 나타낸다.)ΔT (° C) represents the upper and lower temperature differences, T ave (° C) represents the upper and lower temperature averages, and ΔHp (mm) represents the height difference between the pass line and the material center (Hp-0.5H) and Hp (mm) The height of the pass line, H (mm) is the thickness of the rolled material, ΔH (mm) is the rolling amount (Hh), h is the thickness of the material after rolling, α, β, γ is the model tuning coefficient, K ( 1 / s) is a warp tuning coefficient.) 상기 주제어기로부터의 분사노즐 및 분사시간 신호에 따라 오일분사를 제어하는 오일제어기;An oil controller for controlling oil injection according to the injection nozzle and the injection time signal from the main controller; 상기 오일제어기의 신호에 따라 서로 배타적으로 선택되어, 상기 압연소재에 오일을 정해진 시간 동안 분사하는 상부 및 하부 오일분사노즐; 및An upper and lower oil spray nozzles selected exclusively from each other according to a signal of the oil controller and spraying oil on the rolled material for a predetermined time; And 압연기의 후단에 위치하고, 카메라가 포함되어 상기 압연소재의 상하향을 측정하여 이를 주제어기로 피드백하는 워프(Warp)검출센서를 포함하는 압연소재의 워핑 제어시스템 장치.Located in the rear end of the rolling mill, a warping control system device for a rolled material comprising a warp (Warp) detection sensor that includes a camera to measure the vertical direction of the rolled material and feeds it back to the main controller. 제 1 항에 있어서,The method of claim 1, 상기 주제어기에 압연소재의 위치정보를 전달하는 위치센서를 더 구비하여 상기 오일분사노즐의 분사시점을 결정하는 압연소재의 워핑 제어시스템 장치.Rolling material warping control system device further comprising a position sensor for transmitting the position information of the rolled material to the main controller to determine the injection time of the oil spray nozzle. 제 2 항에 있어서,The method of claim 2, 상기 위치센서는 압연소재를 이송하는 구동모터에 부착되는 테이블 롤러의 회전속도 측정센서 및, 압연소재의 이동 구간별로 설치된 HMD(Hot Metal Detector)를 포함하는 것을 특징으로 하는 압연소재의 워핑 제어시스템 장치.The position sensor is a warping control system device of a rolled material, characterized in that it comprises a rotational speed measuring sensor of the table roller attached to the drive motor for transporting the rolled material, HMD (Hot Metal Detector) installed for each moving section of the rolled material . 제 1 항 내지 제3 항의 압연소재의 워핑 제어시스템 장치의 제어방법으로서, As a control method of the warping control system apparatus of the rolled material of claim 1, 위치센서에서 압연소재에 대한 위치정보를 트리킹(tricking)하는 단계;Tricking position information on the rolled material in the position sensor; 상기 압연소재 위치 측정단계에서 얻어진 신호정보로 노즐분사시점을 선택하고, 압연소재의 두께, 패스라인의 높이, 압연되는 양(두께), 및 압연기 상하부 입측의 상하부 온도를 이용하여 주제어기에서 상하부 노즐의 분사노즐 및 시간을 선정하는 단계; The nozzle injection time point is selected by the signal information obtained in the rolling material position measuring step, and the upper and lower nozzles are controlled by the main controller using the thickness of the rolled material, the height of the pass line, the amount of rolling (thickness), and the upper and lower temperatures of the upper and lower sides of the rolling mill. Selecting a spray nozzle and time; 주제어기로부터 지령받은 분사시점, 분사노즐 및 분사시간에 따라 오일제어기가 선택된 노즐을 제어하여 실제 오일을 분사하는 단계; 및 Spraying the actual oil by controlling the selected nozzle by the oil controller according to the injection time, the injection nozzle and the injection time commanded from the main controller; And 압연기를 통과한 압연소재의 워프상태를 워핑검출센서로 측정하여 주제어기로 입력하는 단계를 포함하는 압연소재의 워핑 제어시스템 장치의 제어방법. A method of controlling a warping control system device for a rolled material comprising measuring the warp state of the rolled material passing through the rolling mill with a warping detection sensor and inputting it as a main controller.
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