KR20010061656A - Width control method of slab - Google Patents

Width control method of slab Download PDF

Info

Publication number
KR20010061656A
KR20010061656A KR1019990064154A KR19990064154A KR20010061656A KR 20010061656 A KR20010061656 A KR 20010061656A KR 1019990064154 A KR1019990064154 A KR 1019990064154A KR 19990064154 A KR19990064154 A KR 19990064154A KR 20010061656 A KR20010061656 A KR 20010061656A
Authority
KR
South Korea
Prior art keywords
width
slab
tension
plc
controlling
Prior art date
Application number
KR1019990064154A
Other languages
Korean (ko)
Other versions
KR100417511B1 (en
Inventor
김신일
최정욱
백계주
Original Assignee
이구택
포항종합제철 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이구택, 포항종합제철 주식회사 filed Critical 이구택
Priority to KR10-1999-0064154A priority Critical patent/KR100417511B1/en
Publication of KR20010061656A publication Critical patent/KR20010061656A/en
Application granted granted Critical
Publication of KR100417511B1 publication Critical patent/KR100417511B1/en

Links

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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/06—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring tension or compression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/06—Width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/02—Tension

Abstract

PURPOSE: A method for controlling the width of a slab is provided to control a width deviation by adjusting tension of the slab between rolling mills according to the deviation between the target width and the actual width. CONSTITUTION: In a method for controlling a width of a slab rolled by a plurality of rolling mills, the method for controlling the width of a slab (1) comprises the steps of inputting a target width of the slab into a PLC (30) from a system controller; inputting the actually measured width of the slab into the PLC from a width measuring instrument installed at the back side of the rolling mills (2); inputting the measured tension into the PLC after measuring a tension which is applied to the slab through a looper (4) positioned between the rolling mills; and controlling a target width of the slab, a width of the measured slab and a tension in the PLC by controlling the rotation of a motor (5) in which rolls of the rolling mills are rotated by a control logic.

Description

슬래브 폭 제어방법{Width control method of slab}Width control method of slab

본 발명은 압연공정에서 슬래브의 폭을 제어하는 방법에 관한 것이며, 특히, 압연공정에서 온도편차 및 다른 압연인자를 고려하여 슬래브의 폭을 제어할 수 있는 방법에 관한 것이다.The present invention relates to a method for controlling the width of the slab in the rolling process, and more particularly, to a method for controlling the width of the slab in consideration of the temperature deviation and other rolling factors in the rolling process.

용강은 연주공정 및 압연공정을 거치면서 슬래브로 제작되고, 계속적으로 압연되면서 열연강판으로 제조된다. 미니밀에서 마무리 압연기의 압연 전에 슬래브의 폭은 일정 한정치 내에 유지하여야 하며, 그러기 위해 압연기에 의해 압연되면서 슬래브의 폭은 목표하는 폭으로 제어한다.Molten steel is made of slab during the regeneration process and rolling process, and is continuously made hot-rolled steel sheet while rolling. In the mini mill, the width of the slab must be kept within a certain limit before rolling of the finishing mill, so that the width of the slab is controlled to the desired width while rolling by the rolling mill.

그러나, 슬래브의 폭은 연주공정에서 여러 요인에 의해 폭편차가 발생하고, 연주공정에서 폭 편차를 가진 슬래브는 또 다시 압연공정에서 온도편차 및 다른 압연인자의 영향으로 더 큰 편차로 발생하게 된다.However, the width of the slab is caused by a wide variation in the width of the slab due to a number of factors, and the slab with a width deviation in the slab is again caused by a larger deviation due to the temperature deviation and other rolling factors in the rolling process.

이렇게 압연공정을 거친 슬래브의 폭편차는 마무리 압연기에서 제어할 수 있는 폭 편차량의 범위를 벗어나기 때문에 마무리 압연기를 통한 압연 전에 슬래브의 폭 편차의 제어는 필수적이다.Since the width deviation of the slab subjected to the rolling process is out of the range of the width deviation that can be controlled in the finishing mill, controlling the width deviation of the slab before rolling through the finishing mill is essential.

도 1은 종래의 기술에 따른 압연기의 폭 제어를 나타낸 개념도이다.1 is a conceptual diagram showing the width control of the rolling mill according to the prior art.

도 1에 도시된 바와 같이, 종래의 압연공정의 시스템 작동의 흐름은 먼저, PCS(Process Control System)내의 셋업(Set up)장치(8)에서 해당 슬래브(1)의 목표하는 폭으로 압연할 수 있도록 목표 장력을 설정하고, 설정된 목표 장력을 PLC(Programmable Logic Controller)의 MFC(Mass Flow Control)(7)에 전송하면, 이 목표 장력과 루퍼(4)에서 피드백(feedback)되어 측정된 장력을 비교하여 편차가 발생하면, 속도제어계(ASR; Automatic Speed Regulator)(6)가 모터(5)의 회전속도를 제어한다. 따라서, 모터(5)에 의해 회전하는 압연기(2)의 롤 회전속도 또한 제어되므로써, 압연기(2)들 간의 장력을 일정하게 유지한다.As shown in FIG. 1, the flow of system operation of a conventional rolling process may first be rolled to the desired width of the slab 1 in a set up device 8 in a process control system (PCS). Set the target tension so that the target tension is transmitted to the Mass Flow Control (MFC) (7) of the programmable logic controller (PLC), and the target tension is fed back from the looper (4) to measure the measured tension. If a deviation occurs, the automatic speed regulator (ASR) 6 controls the rotation speed of the motor 5. Therefore, the roll rotational speed of the rolling mill 2 rotating by the motor 5 is also controlled, so that the tension between the rolling mills 2 is kept constant.

이런 시스템을 이용한 종래의 슬래브 폭 제어방법은 폭측정계(3)에서슬래브(1)의 실측폭을 계측한다. 그리고, PCS(20)내의 폭 제어시스템 로직에서 계산된 목표폭과 실측폭과의 편차가 발생시에, MFC(7)을 슬래브 폭 제어방법의 엑추에이터(actuator)로 이용하여, 엑추에이터에 폭 제어를 위한 목표장력을 변경하여 전송한다.The conventional slab width control method using such a system measures the actual width of the slab 1 in the width measuring system 3. When the deviation between the target width and the measured width calculated by the width control system logic in the PCS 20 occurs, the MFC 7 is used as an actuator of the slab width control method to control the width of the actuator. Change the target tension and send it.

이에 따라, MFC(7)는 장력을 목표장력 기준으로 일정하게 유지하고, 이런 목표장력은 슬래브(1)에 부과된다. 따라서, 슬래브(1)는 목표장력에 의해 연신되며 슬래브(1)의 폭이 변경된다. 이런 과정으로 실측폭과 목표폭의 편차가 줄어들 때까지 폭제어를 수행한다.Accordingly, the MFC 7 keeps the tension constant on the basis of the target tension, and this target tension is imposed on the slab 1. Therefore, the slab 1 is stretched by the target tension and the width of the slab 1 is changed. In this process, width control is performed until the deviation between the measured width and the target width is reduced.

그러나, 종래의 슬래브 폭 제어시스템은 동일한 슬래브에 대해서 다수의 압연기에 부과되는 장력이 모두 일정하다. 이는 일정한 슬래브에 일정한 장력을 부과하면 해당 슬래브의 폭은 모두 일정하게 된다는 원리를 이용한 것인데, 미니밀의 압연공정에서는 온도편차가 심하고, 각종 인자가 폭변동에 영향을 많이 주고, 폭을 가변적으로 조정하기 위해서는 적합하지 않은 시스템이다.However, in the conventional slab width control system, the tensions imposed on multiple rolling mills for the same slab are all constant. This is based on the principle that when a certain tension is applied to a certain slab, the width of the slab is all constant. In the milling process of mini mills, the temperature deviation is severe, and various factors influence the width fluctuations and the width is variably adjusted. This is not a suitable system.

본 발명은 앞서 설명한 바와 같은 종래 기술의 문제점을 해결하기 위하여 제공된 것으로서, 목표폭과 실측폭의 편차에 따른 압연기들 간의 슬래브의 장력을 조정하여 폭 편차를 제어하는 슬래브 폭 제어방법을 제공하는데 그 목적이 있다.The present invention is provided to solve the problems of the prior art as described above, to provide a slab width control method for controlling the width deviation by adjusting the tension of the slab between the rolling mill according to the deviation of the target width and the measured width. There is this.

도 1은 종래의 기술에 따른 압연기의 폭 제어를 나타낸 개념도이고,1 is a conceptual diagram showing the width control of the rolling mill according to the prior art,

도면에서, 도 2는 본 발명의 한 실시예에 따른 슬래브 폭 제어방법의 개념도이며,2 is a conceptual diagram of a slab width control method according to an embodiment of the present invention,

도 3은 도 2에 도시된 슬래브 폭 제어방법에 따른 흐름도이다.3 is a flow chart according to the slab width control method shown in FIG.

♠ 도면의 주요부분에 대한 부호의 설명 ♠♠ Explanation of symbols on the main parts of the drawing ♠

1 : 슬래브 2 : 압연기1: slab 2: rolling mill

3 : 폭측정계 4 : 루퍼3: width meter 4: looper

5 : 모터 6 : 속도제어계5: motor 6: speed control system

7 : MFC(Mass Flow Control) 19 : 폭제어기7: MFC (Mass Flow Control) 19: Width Controller

20 : PCS(Process Control System) 25 : 필터20: PCS (Process Control System) 25: Filter

앞서 설명한 바와 같은 목적을 달성하기 위한 본 발명에 따르면, 다수 개의 압연기에 의해 압연되는 슬래브의 폭을 제어하는 방법에 있어서, 상위 컴퓨터로부터 상기 슬래브의 목표하는 폭이 PLC로 입력되는 단계와, 상기 압연기의 후방에 설치된 폭측정계로부터 실측된 슬래브의 폭이 PLC로 입력되는 단계와, 상기 압연기들 사이에 위치한 루퍼를 통해 슬래브에 가해지는 장력이 측정되어 PLC로 입력되는 단계와, 상기 PLC에서는 목표하는 슬래브의 폭과, 측정된 슬래브의 폭 및, 장력을 제어로직에 의해 압연기의 롤을 회전시키는 모터의 회전을 제어하는 단계를 포함하는 슬래브 폭 제어방법이 제공된다.According to the present invention for achieving the object as described above, in the method for controlling the width of the slab rolled by a plurality of rolling mills, the step of inputting the target width of the slab from the host computer into the PLC, and the rolling mill The width of the slab measured from the width measuring system installed in the rear of the input to the PLC, the tension applied to the slab through the looper located between the rolling mill is measured and input to the PLC, and the target slab in the PLC A slab width control method is provided, comprising controlling the rotation of a motor to rotate a roll of a mill by controlling the width of the slab, the width of the measured slab, and the tension control logic.

또한, 본 발명에 따르면, 상기 폭측정계로부터 측정된 슬래브의 폭은 필터를 통해 노이즈가 제거되어 입력된다.In addition, according to the present invention, the width of the slab measured from the width measuring system is input by removing noise through a filter.

아래에서, 본 발명에 따른 슬래브 폭 제어방법의 양호한 실시예를 첨부한 도면을 참조로 하여 상세히 설명하겠다.In the following, with reference to the accompanying drawings a preferred embodiment of the slab width control method according to the present invention will be described in detail.

도면에서, 도 2는 본 발명의 한 실시예에 따른 슬래브 폭 제어방법의 개념도이며, 도 3은 도 2에 도시된 슬래브 폭 제어방법에 따른 흐름도이다.2 is a conceptual diagram of a slab width control method according to an embodiment of the present invention, Figure 3 is a flow chart according to the slab width control method shown in FIG.

도 2 및 도 3에 도시된 바와 같이, 본 발명의 슬래브 폭 제어방법은 비례 적분(PI)제어로 압연기(2)들 간의 장력을 일정하게 목표장력으로 유지시킨다는 것이다. 이런 목표장력은 해당 슬래브(1)의 압연 전에 PCS(20)에서 PLC(30)로 전송되고, PLC(30)내에서의 장력일정제어 로직에서 25m/sec의 제어주기로 장력을 일정하게 유지한다. PLC(30)에서 계산된 최종값은 압연기(2)의 롤의 회전속도를 결정한다. 따라서, 목표 장력에 따른 목표 롤 회전속도에 따라 ASR(Automatic Speed Regulator)(6)이 압연기(2)의 롤의 회전속도를 제어하여 장력을 변화시키고, 변화된 장력은 압연기(2)들 사이에 설치된 루퍼(4)에 의해 수직하중이 계측된다.As shown in Figures 2 and 3, the slab width control method of the present invention is to maintain the tension between the rolling mill (2) to the target tension constant by proportional integration (PI) control. This target tension is transmitted from the PCS 20 to the PLC 30 before rolling the slab 1 and keeps the tension constant at a control cycle of 25 m / sec in the tension constant control logic in the PLC 30. The final value calculated by the PLC 30 determines the rotational speed of the roll of the rolling mill 2. Therefore, the ASR (Automatic Speed Regulator) 6 changes the tension by controlling the rotational speed of the roll of the rolling mill 2 according to the target roll rotational speed according to the target tension, and the changed tension is installed between the rolling mills 2. The vertical load is measured by the looper 4.

또한, PLC(30)내에서는 루퍼(4)에 있는 로드셀에서 측정된 힘을 장력량으로 환산하여 목표장력과 비교한다. 이렇게 목표장력이 도달할 때까지 제어 루퍼(4)가 작동된다.Further, in the PLC 30, the force measured in the load cell in the looper 4 is converted into the amount of tension and compared with the target tension. The control looper 4 is operated until the target tension is thus reached.

한편, 상위컴퓨터의 폭제어기(19)에는 폭 제어 시스템의 제어 로직을 이용하며, 폭 제어 시스템의 제어 로직의 PLC(30)의 MFC(7)는 이 제어시스템의 엑추에이터로 이용된다. 도 3에서 처럼 폭 제어 시스템의 제어 로직에서는 폭측정계(3)에서 계측한 폭 데이터를 피드백 받고, 사상압연의 폭 한계치까지 고려한 목표폭과의 편차를 비례적분(PI)제어를 통해 제어량을 계산하고, 장력연산기능에서 이 편차를 정확하게 제어하기 위해서 폭과 장력과의 수학식 1을 이용하여 제어 장력량을 계산하여 PLC(30)에 새로운 목표장력을 전송하면, PLC(30)의 MFC(7)은 그에 따라 압연기(2)들 사이의 장력을 변동하면 슬래브(1)는 연신에 의해 변형하여 목표폭으로 제어된다.On the other hand, the control logic of the width control system is used for the width controller 19 of the host computer, and the MFC 7 of the PLC 30 of the control logic of the width control system is used as the actuator of this control system. As shown in FIG. 3, the control logic of the width control system receives feedback of the width data measured by the width measuring system 3, calculates a control amount through a proportional integral (PI) control of the deviation from the target width considering the width limit of the finishing rolling. In order to precisely control this deviation in the tension calculation function, the control tension amount is calculated using Equation 1 between the width and the tension, and the new target tension is transmitted to the PLC 30. Then, the MFC 7 of the PLC 30 is transmitted. When the tension between the mills 2 is changed accordingly, the slab 1 is deformed by stretching and controlled to the target width.

t=R1과 R2의 거리×(1-R1압하율)/주속t = distance between R1 and R2 x (1-R1 reduction ratio) / circumferential speed

dVw=dW/(W×t)dVw = dW / (W × t)

deL=2.28×dVwdeL = 2.28 × dVw

여기에서, t는 연산시간이고, dW는 폭편차이고, W는 폭이고, Vc는 주속이고, R1은 압하량 hR1이며, dVw는 폭변형속도제어량이고, deL은 연신변형속도제어량이다.Here, t is the calculation time, dW is the width deviation, W is the width, Vc is the main speed, R1 is the rolling reduction hR1, dVw is the width strain control amount, deL is the stretching strain control amount.

한편, 장력제어량(dTT)은 수학식 2로 계산된다.On the other hand, the tension control amount (dTT) is calculated by the equation (2).

dTT = - deL/SdTT =-deL / S

여기에서, T는 온도이다.Where T is the temperature.

또한, PCS(20)내의 제어 로직에서 폭측정계(3)에서 계측된 데이터는 현장에 따른 노이즈를 많이 가지고 있어서, 필터를 통한 필터링된 실측 폭 데이터의 신뢰성을 높이고, 상기 수학식 1을 이용한 장력변환기는 압연현상의 비선형성을 고려하여 정도 높은 폭제어가 가능하게 하기 위해서 폭제어량의 장력변환 수식을 이용한다.In addition, the data measured by the width measuring system (3) in the control logic in the PCS (20) has a lot of noise according to the site, thereby increasing the reliability of the filtered measurement width data through the filter, the tension transducer using the equation (1) In order to enable a high degree of width control in consideration of the nonlinearity of the rolling phenomenon, the tension control equation of the width control amount is used.

앞서 상세히 설명한 바와 같이, 본 발명의 슬래브 폭 제어방법은 실측되는 슬래브의 폭과 목표하는 슬래브의 폭을 비례적분 제어하여 온도편차 및 다른 압연인자의 영향에 따라 변화된 슬래브의 폭 편차를 일정 한계치의 범위 내에 유지하도록 할 수 있어 제품의 품질을 향상시킬 수 있다는 장점이 있다.As described in detail above, the slab width control method of the present invention controls the width of the slab to be measured and the width of the target slab by proportional integral control to change the width variation of the slab according to the temperature deviation and the influence of other rolling factors within a certain limit. It can be kept in the inside has the advantage of improving the quality of the product.

이상에서 본 발명의 슬래브 폭 제어방법에 대한 기술사상을 첨부도면과 함께 서술하였지만, 이는 본 발명의 가장 양호한 실시예를 예시적으로 설명한 것이지 본 발명을 한정하는 것은 아니다. 또한, 이 기술분야의 통상의 지식을 가진 자이면 누구나 본 발명의 기술사상의 범주를 이탈하지 않는 범위 내에서 다양한 변형 및 모방이 가능함은 명백한 사실이다.The technical idea of the slab width control method of the present invention has been described above with the accompanying drawings, but this is only illustrative of the best embodiment of the present invention and not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (2)

다수 개의 압연기에 의해 압연되는 슬래브의 폭을 제어하는 방법에 있어서,In the method of controlling the width of the slab rolled by a plurality of rolling mills, 상위 컴퓨터로부터 상기 슬래브의 목표하는 폭이 PLC로 입력되는 단계와,Inputting a desired width of the slab from a host computer into a PLC, 상기 압연기의 후방에 설치된 폭측정계로부터 실측된 슬래브의 폭이 PLC로 입력되는 단계와,Inputting the width of the slab measured from the width gauge installed at the rear of the rolling mill to the PLC; 상기 압연기들 사이에 위치한 루퍼를 통해 슬래브에 가해지는 장력이 측정되어 PLC로 입력되는 단계와,Measuring the tension applied to the slab through the loopers located between the rolling mills and inputting them to the PLC; 상기 PLC에서는 목표하는 슬래브의 폭과, 측정된 슬래브의 폭 및, 장력을 제어로직에 의해 압연기의 롤을 회전시키는 모터의 회전을 제어하는 단계를 포함하는 것을 특징으로 하는 슬래브 폭 제어방법.And controlling the rotation of the motor which rotates the roll of the rolling mill by controlling the width of the target slab, the measured slab width, and the tension by the control logic. 제 1 항에 있어서,The method of claim 1, 상기 폭측정계로부터 측정된 슬래브의 폭은 필터를 통해 노이즈가 제거되어 입력되는 것을 특징으로 하는 슬래브 폭 제어방법.The slab width control method of the slab width measuring method characterized in that the noise is input through the filter is removed.
KR10-1999-0064154A 1999-12-28 1999-12-28 Width control method of slab KR100417511B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR10-1999-0064154A KR100417511B1 (en) 1999-12-28 1999-12-28 Width control method of slab

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR10-1999-0064154A KR100417511B1 (en) 1999-12-28 1999-12-28 Width control method of slab

Publications (2)

Publication Number Publication Date
KR20010061656A true KR20010061656A (en) 2001-07-07
KR100417511B1 KR100417511B1 (en) 2004-02-05

Family

ID=19631470

Family Applications (1)

Application Number Title Priority Date Filing Date
KR10-1999-0064154A KR100417511B1 (en) 1999-12-28 1999-12-28 Width control method of slab

Country Status (1)

Country Link
KR (1) KR100417511B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100543300B1 (en) * 2001-11-09 2006-01-20 주식회사 포스코 Method and apparatus for controlling the width of the rolled product
KR100957707B1 (en) * 2002-12-28 2010-05-12 주식회사 포스코 Method for controlling width of slab in continuous rolling mill
CN114082792A (en) * 2021-10-19 2022-02-25 首钢集团有限公司 Method for adjusting width of heated plate blank

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100961352B1 (en) 2008-06-19 2010-06-04 주식회사 포스코 apparatus and method for preventing width's decreasing situation of finishing mill

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59156512A (en) * 1983-02-23 1984-09-05 Kawasaki Steel Corp Controlling method of width in hot strip rolling
JPS60141319A (en) * 1983-12-29 1985-07-26 Ishikawajima Harima Heavy Ind Co Ltd Sheet-width controlling method of hot-finish rolling mill
JPH02235511A (en) * 1989-03-08 1990-09-18 Sumitomo Metal Ind Ltd Method for controlling plate thickness at hot finish rolling time
JP3456077B2 (en) * 1995-11-30 2003-10-14 Ｊｆｅスチール株式会社 Strip width control method for tandem rolling mill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100543300B1 (en) * 2001-11-09 2006-01-20 주식회사 포스코 Method and apparatus for controlling the width of the rolled product
KR100957707B1 (en) * 2002-12-28 2010-05-12 주식회사 포스코 Method for controlling width of slab in continuous rolling mill
CN114082792A (en) * 2021-10-19 2022-02-25 首钢集团有限公司 Method for adjusting width of heated plate blank

Also Published As

Publication number Publication date
KR100417511B1 (en) 2004-02-05

Similar Documents

Publication Publication Date Title
US3694636A (en) Digital computer process control with operational learning procedure
JPH03238113A (en) Rolling of material at front and rear end of workpiece to predetermined size
US9411324B2 (en) Hot strip mill controller
JPH03238112A (en) Control method and device to compensate speed effect in tandem cold roll device
JP2005095975A (en) Method and device for controlling thickness of rolled product
JPS641210B2 (en)
KR100417511B1 (en) Width control method of slab
CN111495981B (en) Plant control device and rolling control device
JPH08281313A (en) Method and apparatus for controlling in advance thickness infoil rolling
JP3255242B2 (en) Method and apparatus for controlling sheet thickness in calendar
JP2000023623A (en) Refinement of raw materials for confectionery and its apparatus
JP2018122339A (en) Plate thickness control method, plate thickness control device, cold rolling equipment and manufacturing method of steel plate
US6202459B1 (en) Method of and rolling mill train for producing bar-shaped rolled products
JP2653128B2 (en) Control method of cold tandem rolling mill
RU2198753C1 (en) Method for setting speed mode of continuous group of rolling stands of hot rolling mill at providing minimum tension between stands
JP6990116B2 (en) Roller plate thickness control device and method, and rolling mill
KR20040110479A (en) Forward-rate compensation method of rolling mill
KR790001893B1 (en) Shape control method for tandem rolling mill
KR100273949B1 (en) Device and method for control of thickness of plate in cold rolling
KR20010018239A (en) Method for controlling shape of roll
JP2023033789A (en) meandering control method and meandering control device
JPH0722769B2 (en) Automatic gain adjustment method for plate thickness controller
SU871860A1 (en) Method of controlling strip thickness at rolling drawing rever sive mill
RU47779U1 (en) DEVICE FOR AUTOMATIC TENSION ADJUSTMENT IN THE INTER-CELL INTERMEDIATE OF A ROLLING MILL
KR20020053514A (en) Thickness variation control system of cold rolled steel plate

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20130123

Year of fee payment: 10

FPAY Annual fee payment

Payment date: 20140122

Year of fee payment: 11

FPAY Annual fee payment

Payment date: 20150120

Year of fee payment: 12

FPAY Annual fee payment

Payment date: 20160125

Year of fee payment: 13

LAPS Lapse due to unpaid annual fee