CN101890435A

CN101890435A - Automatic convexity and/or wedge control method and system for hot rolling tandem type rolling mill

Info

Publication number: CN101890435A
Application number: CN 201010230419
Authority: CN
Inventors: 安部可治; 王平源; 刘金存; 韩仁生
Original assignee: Jiangsu Shagang Iron and Steel Research Institute Co Ltd
Current assignee: Jiangsu Shagang Iron and Steel Research Institute Co Ltd
Priority date: 2010-07-20
Filing date: 2010-07-20
Publication date: 2010-11-24
Anticipated expiration: 2030-07-20
Also published as: CN101890435B

Abstract

The invention relates to a convexity and/or wedge automatic control method and system (ASCC) of hot rolling tandem mill, it is through setting up the work roll bending and roll gap leveling feedback control from first to last finishing stand in the hot rolling tandem mill, realize the strip convexity (wedge) control of full automation, namely, in the rolling process, ASCC model is after detecting the wedge of strip steel, compare with goal wedge and get the deviation, utilize comprehensive operation and control means of the system to rectify the deviation, set up the stepped adjustment method, thus make the response of the feedback control maximize, in order to rectify wedge and convexity of strip steel, guarantee the good straightness of the product, prevent the snakelike movement of strip steel in every stand, dispel the single drawback of control means of the existing convexity, the relation of the comprehensive balance convexity and straightness. The invention can ensure the convexity precision and wedge shape of the long axis direction of the strip, improve the flatness, ensure the product quality and the production safety, and effectively improve the economic benefit of a steel rolling mill.

Description

Crown and/or wedge automatic control method and system for hot rolling tandem mill

技术领域technical field

本发明属于自动化控制领域，其涉及带钢生产线的板凸度(楔形)自动控制方法及装置，尤其涉及一种可在带钢生产过程中动态控制带钢全长方向的平直度及凸度(楔形)的热轧串联式轧机的凸度和/或楔形自动控制方法及系统。The invention belongs to the field of automatic control, and relates to a method and a device for automatically controlling the plate convexity (wedge) of a strip steel production line, in particular to a method for dynamically controlling the flatness and convexity of the strip steel in the entire length direction during the strip steel production process A crown and/or wedge automatic control method and system for a (wedge) hot rolling tandem mill.

背景技术Background technique

目前，在带钢生产线上通常采用串联式精轧机组进行轧制，但常见七机架串联式精轧机组的凸度控制模型功能单一，无自动楔形控制技术，其存在诸多缺陷，如：At present, tandem finishing mills are usually used in the strip production line for rolling, but the crown control model of the common seven-stand tandem finishing mill has a single function and no automatic wedge control technology, which has many defects, such as:

(1)凸度调整手段：凸度及板形控制模型中的凸度控制主要作用于某一架精轧机，即二级计算机中的凸度及板形控制系统根据轧辊的磨损、热膨胀及实际轧制力计算出该机架的辊缝凸度，同设定值进行比较后，通过弯辊力进行相应调节，保证轧件的凸度，进而控制平直度，由于只作用于一架精轧机，使得凸度控制手段单一，无法有效调整其他机架的凸度，需要操作工进行手动弯辊调整或者微调轧制力分配，造成凸度和平直度的控制手段相对落后。(1) Crown adjustment method: The crown control in the crown and shape control model mainly acts on a certain finishing mill, that is, the crown and shape control system in the secondary computer is based on the wear, thermal expansion and actual conditions of the rolls. The rolling force calculates the roll gap crown of the stand, and compares it with the set value, and adjusts accordingly through the bending force to ensure the crown of the rolled piece, and then control the flatness. Since it only acts on one precision stand For rolling mills, the crown control method is single, and the crown of other stands cannot be effectively adjusted. Operators are required to manually adjust the roll bending or fine-tune the rolling force distribution, resulting in relatively backward control methods for crown and flatness.

(2)平直度控制：凸度控制的最终目的是为了得到良好的平直度，目前带钢生产线平直度的控制只作用于末机架(F₇)，当接收到平直度仪表传过来的板形数据时，通过调整末机架的弯辊力来控制平直度，但是，当卷取机建张后，由于平直度仪表输出值不实，导致调整效果不佳，板形不理想。(2) Flatness control: The ultimate goal of crown control is to obtain good flatness. Currently, the flatness control of the strip steel production line only acts on the end frame (F ₇ ). When passing the sheet shape data, the flatness is controlled by adjusting the bending force of the end frame. However, after the coiler is built, the output value of the flatness meter is not true, resulting in poor adjustment results. The shape is not ideal.

(3)楔形控制技术：由于没有自动楔形控制技术，容易导致带钢产生单边浪和生产安全问题，这些问题在现有控制模型中无法得到改善。(3) Wedge control technology: Since there is no automatic wedge control technology, it is easy to cause unilateral wave and production safety problems in the strip, which cannot be improved in the existing control model.

因此，综述之，现有技术中的凸度及板形控制工艺和设备无法满足严格的带钢板形质量要求，亟待进行改造和完善，以便满足市场的产品质量需求。Therefore, in summary, the crown and shape control process and equipment in the prior art cannot meet the strict quality requirements of the strip shape, and urgently need to be reformed and improved in order to meet the product quality requirements of the market.

发明内容Contents of the invention

本发明的目的在于提出一种热轧串联式轧机的凸度和/或楔形自动控制方法及系统，其可有效保证带材在长轴方向的凸度精度与楔形，提高平直度。保证产品质量和生产安全，从而克服现有技术中的不足。The purpose of the present invention is to provide a crown and/or wedge automatic control method and system for a hot rolling tandem mill, which can effectively ensure the crown accuracy and wedge shape of the strip in the long axis direction and improve the flatness. Product quality and production safety are guaranteed, thereby overcoming the deficiencies in the prior art.

为实现上述发明目的，本发明采用了如下技术方案：In order to realize the above-mentioned purpose of the invention, the present invention has adopted following technical scheme:

一种热轧串联式轧机的凸度和/或楔形自动控制系统，其应用于主要由串联设置的数个精轧机架组成的热轧串联式轧机中，各精轧机架上均配备工作辊弯辊调整系统以及轧辊辊缝调整系统，其特征在于：A crown and/or wedge automatic control system of a hot-rolling tandem mill, which is applied in a hot-rolling tandem mill mainly composed of several finishing stands arranged in series, each finishing stand is equipped with a work roll bend The roll adjustment system and the roll gap adjustment system are characterized in that:

所述凸度和/或楔形自动控制系统包括凸度和/或楔形控制装置，所述凸度和/或楔形控制装置与各精轧机架上的工作辊弯辊调整系统及轧辊辊缝调整系统和设置在精轧出口的带材板形以及楔形和/或凸度测量装置分别连接；The crown and/or wedge automatic control system includes a crown and/or wedge control device, and the crown and/or wedge control device is connected with the work roll bending adjustment system and the roll gap adjustment system on each finishing stand It is respectively connected with the strip shape and wedge shape and/or crown measuring device arranged at the finish rolling exit;

并且，所述凸度和/或楔形控制装置可根据带材板形以及楔形和/或凸度测量装置定时测得的带材板形以及楔形和/或凸度数据与目标楔形和/或凸度数据比较所得差值，通过各精轧机架上的工作辊弯辊调整系统以及轧辊辊缝调整系统调整各精轧机架的辊缝和工作辊弯辊力，实现在带材的长轴方向的自动凸度和/或楔形控制。And, described convexity and/or wedge-shape control device can be according to strip material strip shape and wedge-shape and/or convexity measuring device regularly measured strip shape and wedge-shape and/or convexity data and target wedge-shape and/or convexity The difference obtained by comparing the degree data is adjusted through the work roll bending adjustment system and the roll gap adjustment system on each finishing stand to adjust the roll gap and work roll bending force of each finishing stand to realize the long-axis direction of the strip. Automatic crown and/or wedge control.

进一步地讲：所述凸度和/或楔形控制装置分别通过辊缝调平控制开关和工作辊弯辊力控制开关与轧辊辊缝调整系统和工作辊弯辊调整系统连接；Further, the crown and/or wedge control device is connected to the roll gap adjustment system and the work roll bending adjustment system through the roll gap leveling control switch and the work roll bending force control switch respectively;

当带材头部到达板形仪测量装置时，工作辊弯辊力控制开关闭合，工作辊弯辊调整系统开始工作，当带材尾部被飞剪切割时，工作辊弯辊力控制开关断开，工作辊弯辊调整系统停止工作；When the strip head reaches the measuring device of the shape meter, the work roll bending force control switch is closed, and the work roll bending adjustment system starts to work. When the strip tail is cut by flying shear, the work roll bending force control switch is turned off. open, the work roll bending adjustment system stops working;

当带材头部进入地下卷曲，并建张时，辊缝调平控制开关闭合，轧辊辊缝调整系统开始工作，当带材尾部被飞剪切割时，辊缝调平控制开关断开，轧辊辊缝调整系统停止工作。When the head of the strip enters the ground and is coiled and stretched, the roll gap leveling control switch is closed, and the roll gap adjustment system starts to work. When the strip tail is cut by flying shears, the roll gap leveling control switch is turned off. The roll gap adjustment system stops working.

所述辊缝调平控制开关和工作辊弯辊力控制开关分别通过一控制总开关与所述凸度和/或楔形控制装置连接。The roll gap leveling control switch and the work roll bending force control switch are respectively connected to the crown and/or wedge control device through a master control switch.

所述凸度和/或楔形控制装置、带材板形以及楔形和/或凸度测量装置、工作辊弯辊调整系统以及轧辊辊缝调整系统之间均采用联锁装置连接。The crown and/or wedge control device, the strip shape and wedge and/or crown measurement device, the work roll bending adjustment system and the roll gap adjustment system are all connected by an interlocking device.

所述实现在带材的长轴方向的自动楔形控制的过程为：The process of realizing the automatic wedge control in the long axis direction of the strip is:

(1)影响系数和继承系数预输入：根据轧机、轧辊和带材变形离线计算影响系数和继承系数，并将这些影响系数和继承系数输入凸度和/或楔形控制装置；(1) Pre-input of influence coefficient and inheritance coefficient: Calculate the influence coefficient and inheritance coefficient offline according to the deformation of the rolling mill, roll and strip, and input these influence coefficients and inheritance coefficients into the crown and/or wedge control device;

(2)凸度和/或楔形控制装置输入数据：完成轧机设定计算和板形设定计算，之后将所得计算结果以及带材特征信息输入凸度和/或楔形控制装置；(2) Input data to the crown and/or wedge control device: complete the rolling mill setting calculation and the plate shape setting calculation, and then input the obtained calculation results and strip characteristic information into the crown and/or wedge control device;

(3)凸度和/或楔形控制装置板形，楔形，凸度测量：当带材头部到达精轧机出口时，定时测量带材板形、楔形和凸度，凸度和/或楔形控制装置即时计算出带材板形、楔形和凸度的数据平均值，其中，精轧机出口带材楔形

由下式得出，即，(3) Convexity and/or wedge shape control device Plate shape, wedge shape, and crown measurement: When the strip head reaches the exit of the finishing mill, the strip shape, wedge shape, and crown are measured regularly, and the crown and/or wedge shape control The device calculates the average value of strip shape, wedge shape and convexity data in real time, among which, the strip wedge shape at the exit of the finishing mill

From the following formula, that is,

${ΔWedge ΔWedge}_{M m}^{MEAS MEAS} ((T T)) = = {h h}_{WS WS}^{MEAS MEAS} ((T T)) - - {h h}_{DS DS}^{MEAS MEAS} ((T T))$

其中，

是测量出的带材工作侧宽度边缘处的厚度值，

是测量出的带材传动侧宽度边缘厚度值；in,

is the measured thickness of the strip at the working side width edge,

is the measured strip drive side width edge thickness value;

(4)楔形偏差分配：通过水平调整精轧机F₁-F_M机架的来消除精轧机出口楔形偏差 (4) Wedge deviation distribution: Eliminate the wedge deviation at the exit of the finishing mill by horizontally adjusting the F ₁ -F _M stands of the finishing mill

而 ${ΔC}_{M}^{Wedge} (T) = \frac{1}{2} \cdot Δ {Wedge}_{M}^{MEAS} (T)$ and ${ΔC}_{m}^{Wedge} (T) = \frac{1}{2} &Center Dot; Δ {Wedge}_{m}^{MEAS} (T)$

该步骤具体为：The steps are specifically:

首先，板形设定计算计算每个机架出口目标带材凸度得到精轧出口目标带材凸度

和目标机架出口带材凸度

并由下式计算出单位带材凸度系数K_i，Firstly, the shape setting calculation calculates the target strip crown at the exit of each rack to obtain the target strip crown at the exit of finishing rolling

and target rack outlet strip crown

And calculate the unit strip crown coefficient K _i by the following formula,

$\frac{{C C}_{i i}^{REF REF}}{{h h}_{i i}} = = {K K}_{i i} \cdot \cdot \frac{{C C}_{M m}^{REF REF}}{{h h}_{M m}}$

其中，h_M是精轧出口厚度，其系轧机设定计算值，i是机架号，且i＝1、2、…M，M是自然数；Wherein, h _M is the exit thickness of finish rolling, which is the calculation value of rolling mill setting, i is the rack number, and i=1, 2, ... M, M is a natural number;

其次，通过下式，经精轧机出口带材楔形偏差

分散到每个精轧机架，即，Secondly, through the following formula, the wedge-shaped deviation of the strip exiting the finishing mill

distributed to each finishing stand, i.e.,

$\frac{Δ Δ {C C}_{i i}^{Wedge Wedge} ((T T))}{{h h}_{i i}} = = {K K}_{i i} \cdot \cdot \frac{Δ Δ {C C}_{M m}^{Wedge Wedge} ((T T))}{{h h}_{M m}}$

其中，

是i机架出口带材楔形修正值；in,

is the strip wedge correction value at the outlet of frame i;

(5)调平控制每个机架辊缝：辊缝调平值ΔL可由下式得出，即，(5) Leveling and controlling the roll gap of each rack: the roll gap leveling value ΔL can be obtained by the following formula, namely,

$Δ Δ {C C}_{i i}^{Wedge Wedge} ((T T)) = = {α α}_{i i}^{L L} ((T T)) \cdot &Center Dot; ΔL Δ L + + {η η}_{i i} ((T T)) \cdot &Center Dot; Δ Δ {C C}_{((i i - - 11))}^{Wedge Wedge} ((T T))$

其中，

是带材边缘处辊缝调平对带材楔形的影响系数，η_i(T)是带材楔形继承系数，各精轧机架根据所得辊缝调平值ΔL调整轧辊辊缝；in,

is the influence coefficient of roll gap leveling at the edge of the strip on the strip wedge, η _i (T) is the strip wedge inheritance coefficient, and each finishing stand adjusts the roll gap according to the obtained roll gap leveling value ΔL;

经由上述步骤，完成楔形调整工作。Through the above steps, the wedge adjustment work is completed.

所述实现在带材的长轴方向的自动凸度控制的过程为：The process of realizing the automatic crown control in the direction of the long axis of the strip is:

(1)带材凸度测量和控制：当带材头部到达精轧机出口时，带材板形、楔形和凸度进行定时测量，并由凸度和/或楔形控制装置即时计算出带材板形、楔形和凸度的数据平均值，其中，精轧出口带材凸度的测量值平均值

由下式得出：(1) Strip crown measurement and control: When the strip head arrives at the exit of the finishing mill, the strip shape, wedge and crown are measured regularly, and the strip profile is calculated in real time by the crown and/or wedge control device. Average value of data for shape, wedge and crown, where the average value of measured values for strip crown at the exit of finish rolling

It is derived from the following formula:

${C C}_{M m}^{R R,, MEAS MEAS} ((T T)) = = {h h}_{C C}^{MEAS MEAS} - - \frac{{h h}_{WS WS}^{MEAS MEAS} ((T T)) + + {h h}_{DS DS}^{MEAS MEAS} ((T T))}{22}$

上式中，是测量的带材宽度中心厚度值，

是测量出的带材工作侧宽度边缘处的厚度值，

是测量出的带材传动侧宽度边缘厚度值；In the above formula, is the measured strip width center thickness value,

is the measured thickness of the strip at the working side width edge,

is the measured strip drive side width edge thickness value;

(2)末机架带材凸度偏差计算：根据下式计算出精轧出口带材凸度偏差

即，(2) Calculation of the crown deviation of the strip at the end stand: calculate the crown deviation of the finished rolling exit strip according to the following formula

Right now,

$Δ Δ {C C}_{((M m))}^{R R} ((T T)) = = {C C}_{M m}^{R R,, MEAS MEAS} ((T T)) - - {C C}_{M m}^{R R,, REF REF} ((T T))$

其中，

是目标精轧出口带材凸度；in,

is the target finish rolling exit strip crown;

(3)凸度偏差分配：将精轧出口带材凸度偏差

通过下式分配到各个机架，即，(3) Allocation of crown deviation: the crown deviation of the exit strip after finishing rolling

assigned to each rack by the following formula, namely,

$\frac{Δ Δ {C C}_{i i}^{R R} ((T T))}{{h h}_{i i}} = = {K K}_{i i} \cdot &Center Dot; \frac{Δ Δ {C C}_{M m}^{R R} ((T T))}{{h h}_{M m}}$

其中，i是机架号，且i＝1、2、…M，M是自然数，h_i是第i机架出口带材厚度，K_i是比例凸度系数，

即为各机架出口带材凸度修正值，

亦是精轧出口带材凸度修正值；Wherein, i is the frame number, and i=1, 2, ... M, M is a natural number, h _i is the i-th frame outlet strip thickness, K _i is the proportional crown coefficient,

That is, the strip crown correction value at the outlet of each rack,

It is also the crown correction value of the exit strip of finishing rolling;

(4)各机架工作辊弯曲力调整：(4) Adjustment of the bending force of the working rolls of each rack:

由下式计算每个机架工作辊弯曲力控制值ΔF_i(ton/side)：Calculate the bending force control value ΔF _i (ton/side) of each rack work roll by the following formula:

${ΔF ΔF}_{i i} = = \frac{11}{{α α}_{i i}^{B B} ((T T))} \cdot &Center Dot; ((Δ Δ {C C}_{i i}^{R R} ((T T)) - - {η η}_{i i} ((T T)) \cdot &Center Dot; Δ Δ {C C}_{((i i - - 11))}^{R R} ((T T))))$

而 $Δ C_{i}^{R} (T) = α_{i}^{B} (T) \cdot {ΔF}_{i} + η_{i} (T) \cdot Δ C_{(i - 1)}^{R} (T)$ and $Δ C_{i}^{R} (T) = α_{i}^{B} (T) \cdot {ΔF}_{i} + η_{i} (T) \cdot Δ C_{(i - 1)}^{R} (T)$

其中，是带材凸度对工作辊弯曲力的影响系数，η(T)是带材凸度继承系数，代入in, is the influence coefficient of the strip crown on the bending force of the work roll, η(T) is the inheritance coefficient of the strip crown, substituted into

$Δ Δ {F f}_{i i}^{CTL CTL} = = Δ Δ {F f}_{i i}$

即得出每个机架工作辊弯曲力控制值

各机架的工作辊弯辊系统藉此工作辊弯曲力控制值调整工作辊弯辊力；That is, the control value of the bending force of each rack work roll is obtained

The work roll bending system of each frame adjusts the work roll bending force based on the work roll bending force control value;

经由上述步骤，完成凸度调整工作。Through the above steps, the convexity adjustment work is completed.

所述带材板形以及楔形和/或凸度测量装置包括板形仪、楔形和/或凸度测量仪表。The strip shape and wedge and/or crown measuring devices include a shape meter, a wedge and/or crown measuring instrument.

所述凸度和/或楔形控制装置采用可编程逻辑控制器。The convexity and/or wedge control device adopts a programmable logic controller.

一种热轧串联式轧机的凸度和/或楔形自动控制方法，其特征在于，该方法为：A crown and/or wedge automatic control method for a hot-rolled tandem mill, characterized in that the method is:

在带钢轧制过程中，对轧件凸度和/或楔形进行动态检测，并将检测到的轧件凸度和/或楔形与目标凸度和/或目标楔形进行比较，再根据实际带钢凸度和/或楔形与目标凸度和/或目标楔形的偏差值，分别调整各精轧机中的轧辊辊缝及工作辊弯辊力，实现对轧件在长轴方向上的自动平直度以及凸度和/或楔形控制。During the strip rolling process, the crown and/or wedge of the rolled piece is dynamically detected, and the detected crown and/or wedge of the rolled piece is compared with the target crown and/or wedge of the target, and then according to the actual strip The deviation value of the steel crown and/or wedge shape from the target crown and/or target wedge shape, adjust the roll gap and work roll bending force in each finishing mill respectively, and realize the automatic straightening of the rolled piece in the long axis direction degree as well as crown and/or wedge control.

具体而言：当带材头部到达板形仪测量装置时，开始进行工作辊弯辊力调整，当带材尾部被飞剪切割时，停止工作辊弯辊力调整，从而实现自动凸度控制。Specifically: when the head of the strip reaches the measuring device of the shape meter, the adjustment of the work roll bending force is started, and when the tail of the strip is cut by the flying shear, the adjustment of the work roll bending force is stopped, so as to realize the automatic crown control.

当带材头部进入地下卷曲，并建张时，开始进行轧辊辊缝调整，当带材尾部被飞剪切割时，停止轧辊辊缝调整，从而实现自动楔形控制。When the head of the strip enters the ground for coiling and tensioning, the roll gap adjustment starts, and when the tail of the strip is cut by the flying shear, the roll gap adjustment is stopped to realize automatic wedge control.

所述实现自动楔形控制的过程为：The described process of realizing automatic wedge control is:

(1)影响系数和继承系数预输入：根据轧机、轧辊和带材变形离线计算影响系数和继承系数，并将这些影响系数和继承系数输入一凸度和/或楔形控制装置；(1) Pre-input of influence coefficient and inheritance coefficient: calculate influence coefficient and inheritance coefficient offline according to rolling mill, roll and strip deformation, and input these influence coefficients and inheritance coefficient into a crown and/or wedge control device;

From the following formula, that is,

$Δ Δ {Wedge Wedge}_{M m}^{MEAS MEAS} ((T T)) = = {h h}_{WS WS}^{MEAS MEAS} ((T T)) - - {h h}_{DS DS}^{MEAS MEAS} ((T T))$

其中，

是测量出的带材工作侧宽度边缘处的厚度值，

是测量出的带材传动侧宽度边缘厚度值；in,

is the measured thickness of the strip at the working side width edge,

is the measured strip drive side width edge thickness value;

(4)楔形偏差分配：通过水平调整精轧机F₁-F_M机架的来消除精轧机出口楔形偏差

(4) Wedge deviation distribution: Eliminate the wedge deviation at the exit of the finishing mill by horizontally adjusting the F ₁ -F _M stands of the finishing mill

而 $Δ C_{M}^{Wedge} (T) = \frac{1}{2} \cdot Δ {Wedge}_{M}^{MEAS} (T)$ and $Δ C_{m}^{Wedge} (T) = \frac{1}{2} &Center Dot; Δ {Wedge}_{m}^{MEAS} (T)$

该步骤具体为：The steps are specifically:

和目标机架出口带材凸度

and target rack outlet strip crown

And calculate the unit strip crown coefficient K _i by the following formula,

其次，通过下式，经精轧机出口带材楔形偏差

distributed to each finishing stand, i.e.,

其中，

是i机架出口带材楔形修正值；in,

is the strip wedge correction value at the outlet of frame i;

$Δ Δ {C C}_{i i}^{Wedge Wedge} ((T T)) = = {α α}_{i i}^{L L} ((T T)) \cdot \cdot ΔL ΔL + + {η η}_{i i} ((T T)) \cdot \cdot Δ Δ {C C}_{((i i - - 11))}^{Wedge Wedge} ((T T))$

其中，是带材边缘处辊缝调平对带材楔形的影响系数，η_i(T)是带材楔形继承系数，各精轧机架根据所得辊缝调平值ΔL调整轧辊辊缝；in, is the influence coefficient of roll gap leveling at the edge of the strip on the strip wedge, η _i (T) is the strip wedge inheritance coefficient, and each finishing stand adjusts the roll gap according to the obtained roll gap leveling value ΔL;

该方法中，所有精轧机架的辊缝调平值，在上一块带钢进行切尾时自动存储为下一块带钢的辊缝预设值，当轧机换辊后所有辊缝调平值自动清零。In this method, the roll-gap leveling values of all finishing stands are automatically stored as the roll-gap preset values of the next strip when the last strip is trimmed, and all roll-gap leveling values are automatically saved after the rolling mill changes rolls. cleared.

所述实现自动凸度控制的过程为：The process of realizing automatic crown control is as follows:

(1)带材凸度测量和控制：当带材头部到达精轧机出口时，带材板形、楔形和凸度进行定时测量，并由一凸度和/或楔形控制装置即时计算出带材板形、楔形和凸度的数据平均值，其中，精轧出口带材凸度的测量值平均值

由下式得出：(1) Strip crown measurement and control: When the strip head arrives at the exit of the finishing mill, the strip shape, wedge and crown are measured regularly, and a crown and/or wedge control device calculates the strip profile in real time. The average value of the data of flat shape, wedge shape and crown, among them, the average value of measured value of strip crown at the exit of finishing rolling

It is derived from the following formula:

上式中，是测量的带材宽度中心厚度值，

是测量出的带材工作侧宽度边缘处的厚度值，

is the measured thickness of the strip at the working side width edge,

is the measured strip drive side width edge thickness value;

Right now,

其中，

是目标精轧出口带材凸度；in,

is the target finish rolling exit strip crown;

(3)凸度偏差分配：将精轧出口带材凸度偏差

assigned to each rack by the following formula, namely,

$\frac{Δ Δ {C C}_{i i}^{R R} ((T T))}{{h h}_{i i}} = = {K K}_{i i} \cdot \cdot \frac{Δ Δ {C C}_{M m}^{R R} ((T T))}{{h h}_{M m}}$

其中，i是机架号，且i＝1、2、…M，M是自然数，h_i是第i机架出口带材厚度，K_i是比例凸度系数，即为各机架出口带材凸度修正值，

亦是精轧出口带材凸度修正值；Wherein, i is the frame number, and i=1, 2, ... M, M is a natural number, h _i is the i-th frame outlet strip thickness, K _i is the proportional crown coefficient, That is, the strip crown correction value at the outlet of each rack,

It is also the crown correction value of the exit strip of finishing rolling;

(4)各机架工作辊弯曲力调整：(4) Adjustment of the bending force of the work rolls of each rack:

${ΔF ΔF}_{i i} = = \frac{11}{{α α}_{i i}^{B B} ((T T))} \cdot \cdot ((Δ Δ {C C}_{i i}^{R R} ((T T)) - - {η η}_{i i} ((T T)) \cdot \cdot Δ Δ {C C}_{((i i - - 11))}^{R R} ((T T))))$

而 $Δ C_{i}^{R} (T) = α_{i}^{B} (T) \cdot {ΔF}_{i} + η_{i} (T) \cdot Δ C_{(i - 1)}^{R} (T)$ and $Δ C_{i}^{R} (T) = α_{i}^{B} (T) &Center Dot; {ΔF}_{i} + η_{i} (T) \cdot Δ C_{(i - 1)}^{R} (T)$

其中，

是带材凸度对工作辊弯曲力的影响系数，η(T)是带材凸度继承系数，代入in,

is the influence coefficient of the strip crown on the bending force of the work roll, η(T) is the inheritance coefficient of the strip crown, substituted into

$Δ Δ {F f}_{i i}^{CTL CTL} = = {ΔF ΔF}_{i i}$

即得出每个机架工作辊弯曲力控制值

本发明通过在热轧串联式轧机中建立从第一台精轧机架到最后一台精轧机架(F₁至F_M)的工作辊弯曲和辊缝调平的反馈控制，实现了全自动化的带材凸度(楔形)控制，即在带钢生产线上建立ASCC(automatic strip crown(wedge)control system，自动带钢凸度(楔形)控制系统)模型。在轧制过程中，ASCC模型在检测出带钢楔形后，同目标楔形比较得出偏差，利用系统的综合运算和控制手段进行纠偏，建立从F₁到F_M的阶梯式调整方法，从而使反馈控制的响应最大化，以纠正带钢楔形，保证产品良好的平直度，防止带钢在各机架内的蛇形运动，保证生产安全；同时，在轧制过程中，ASCC模型在比较实际比例凸度和目标比例凸度的偏差后，充分利用系统的综合控制手段进行纠偏，建立从F₁到F_M的阶梯式调整方法，从而使反馈控制的响应最大化，从而消除现有凸度控制手段单一的弊端，综合平衡凸度和平直度的关系。本发明可保证长轴方向的凸度精度与楔形，提高平直度，保证产品质量和生产安全，并能有效提高轧钢厂经济效益。The present invention realizes the fully automated process by establishing the feedback control of work roll bending and roll gap leveling from the first finishing stand to the last finishing stand (F ₁ to F _M ) in the hot rolling tandem mill Strip crown (wedge) control, that is, to establish an ASCC (automatic strip crown (wedge) control system, automatic strip crown (wedge) control system) model on the strip production line. In the rolling process, after the ASCC model detects the wedge shape of the strip, it compares it with the target wedge shape to get the deviation, uses the comprehensive calculation and control means of the system to correct the deviation, and establishes a stepwise adjustment method from F ₁ to F _M , so that The response of the feedback control is maximized to correct the wedge shape of the strip, ensure good flatness of the product, prevent the serpentine movement of the strip in each rack, and ensure production safety; at the same time, during the rolling process, the ASCC model is comparing After the deviation between the actual proportional convexity and the target proportional convexity, make full use of the comprehensive control means of the system to correct the deviation, and establish a stepwise adjustment method from _F1 to _FM , so as to maximize the response of feedback control and eliminate the existing convexity. The disadvantage of a single degree control method is to comprehensively balance the relationship between convexity and flatness. The invention can ensure the convexity precision and wedge shape in the long axis direction, improve the flatness, ensure the product quality and production safety, and can effectively improve the economic benefits of the rolling mill.

附图说明Description of drawings

以下结合附图以及具体实施方式对本发明作进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

图1所示是设置有自动带钢凸度(楔形)控制系统(ASCC)的7机架串联式带钢生产线精轧机组的结构示意图；Shown in Fig. 1 is to be provided with the structural representation of the 7-stand tandem strip steel production line finish rolling unit that is provided with automatic strip crown (wedge) control system (ASCC);

图2是ASCC输出类型示意图；Fig. 2 is a schematic diagram of ASCC output type;

图3是带材凸度结构示意图；Fig. 3 is a schematic diagram of strip crown structure;

图4是ASCC与其他精轧机功能计算的关系框图；Figure 4 is a block diagram of the relationship between ASCC and other finishing mill function calculations;

图5是ASCC的输入输出示意图；Fig. 5 is the input and output schematic diagram of ASCC;

图6是ASCC输出的辊缝调平值和工作辊弯辊力值参与当前控制的流程示意图。Fig. 6 is a flow diagram of the current control in which the roll gap leveling value and work roll bending force value output by ASCC participate in the current control.

具体实施方式Detailed ways

如下以本发明之一较佳实施例说明本发明的内容，但此实施例并非企图具以对本发明做任何形式上之限制。A preferred embodiment of the present invention is described below to illustrate the content of the present invention, but this embodiment is not intended to limit the present invention in any form.

如图1所示，本实施例涉及一种7机架(F1至F7)串联式带钢生产线精轧机组，其精轧出口处设置板形仪，板形仪与ASCC(可为一可编程逻辑控制器PLC)连接，同时，该ASCC还与各精轧机架中的工作辊弯辊调整系统和轧辊辊缝调整系统连接。As shown in Fig. 1, the present embodiment relates to a 7-stand (F1 to F7) tandem strip steel production line finishing mill, a flatness meter is arranged at the exit of the finishing rolling, and the flatness meter and ASCC (which can be a programmable logic controller PLC), and at the same time, the ASCC is also connected with the work roll bending adjustment system and the roll gap adjustment system in each finishing stand.

该ASCC停启过程为：当带材头部到达精轧机出口处的板形仪时，ASCC开始工作，当带材尾部被飞剪切割时ASCC停止工作。The ASCC stop and start process is as follows: when the head of the strip reaches the shape meter at the exit of the finishing mill, the ASCC starts to work, and when the tail of the strip is cut by the flying shear, the ASCC stops working.

该ASCC的输出有两种类型：其一是机架F1，F2，…，F5，F6，F7的辊缝调平值；其二是机架F1，F2，…，F5，F6，F7的工作辊弯辊力值。The output of this ASCC has two types: one is the roll gap leveling value of the frame F1, F2, ..., F5, F6, F7; the other is the work of the frame F1, F2, ..., F5, F6, F7 Roll bending force value.

带钢头部到达精轧机出口的板形仪时，只有机架F1，F2，…，F5，F6，F7的工作辊弯辊力生效(而辊缝调平控制无效，只有在带钢到达地下卷取机并建张后才生效，防止带钢跑偏)。When the strip head reaches the shape meter at the exit of the finishing mill, only the work roll bending force of the racks F1, F2, ..., F5, F6, F7 takes effect (while the roll gap leveling control is invalid, only when the strip reaches the underground It will take effect only after the coiler is built together to prevent the strip from running off.

带钢在卷取机建张后，ASCC所有控制功能生效，也就是所有精轧机组的辊缝调平控制值和工作辊弯曲力控制值生效，对轧机进行调整控制，直到带钢尾部被飞剪剪切后停止。After the strip is stretched in the coiler, all control functions of ASCC take effect, that is, the roll gap leveling control value and work roll bending force control value of all finishing rolling units take effect, and the rolling mill is adjusted and controlled until the tail of the strip is flying. Stop after shearing.

上述两种输出的选择由以下开关进行控制：The selection of the above two outputs is controlled by the following switches:

如图2所示，SW-1和SW-2分别是ASCC功能中的辊缝调平和工作辊弯辊力的控制总开关；SW-3是辊缝调平控制开关，当带材头部进入地下卷曲时，SW-3闭合，当带材尾部被飞剪切割时，SW-3断开；SW-4是工作辊弯辊力控制开关，当带材头部到达精轧出口的板形仪时，SW-4闭合，当带材尾部被飞剪切割时，SW-4断开。As shown in Figure 2, SW-1 and SW-2 are the main switches for controlling the roll gap leveling and work roll bending force in the ASCC function respectively; SW-3 is the roll gap leveling control switch, when the strip head enters When coiling underground, SW-3 is closed, and when the tail of the strip is cut by flying shears, SW-3 is opened; SW-4 is the control switch of the bending force of the work roll, and when the strip head reaches the shape of the finish rolling exit When the instrument is on, SW-4 is closed, and when the tail of the strip is cut by flying shears, SW-4 is disconnected.

首先，说明本实施例中所述凸度和楔形的定义，其如图3所示：At first, explain the definition of convexity and wedge shape described in the present embodiment, it is as shown in Figure 3:

带材凸度 $C^{R} = h_{C} - \frac{h_{WS} + h_{DS}}{2} - - - (1)$ Strip crown $C^{R} = h_{C} - \frac{h_{WS} + h_{DS}}{2} - - - (1)$

带材楔形Wedge＝h_WS-h_DS(mm) (2)；Strip wedge Wedge＝h _WS -h _DS (mm) (2);

如下详细说明以该ASCC进行自动楔形控制和凸度控制的过程：The process of automatic wedge control and crown control with this ASCC is described in detail as follows:

(步骤1)影响系数和继承系数：如图4-5所示，ASCC需要的影响系数和继承系数将会被存储到ASCC(PLC)，这些影响系数和继承系数由轧机、轧辊和带材变形离线计算。(Step 1) Influence coefficient and inheritance coefficient: As shown in Figure 4-5, the influence coefficient and inheritance coefficient required by ASCC will be stored in ASCC (PLC). Compute offline.

(步骤2)ASCC输入数据：最终完成轧机设定计算(MSUC)和板形设定计算(SSUC)之后，ASCC(PLC)从PDI、MSUC、SSUC收到以下数据并且把数据存储到ASCC。(Step 2) ASCC input data: After finalizing mill setting calculation (MSUC) and flat shape setting calculation (SSUC), ASCC (PLC) receives the following data from PDI, MSUC, SSUC and stores the data in ASCC.

(步骤3)ASCC板形、楔形、凸度测量：当带材头部到达精轧机出口的板形仪时，带材板形、楔形和凸度进行定时测量，ASCC(PLC)即时计算出带材板形、楔形和凸度的数据平均值，(Step 3) ASCC shape, wedge, and crown measurement: when the strip head reaches the shape meter at the exit of the finishing mill, the strip shape, wedge, and crown are measured regularly, and ASCC (PLC) calculates the strip in real time. Data averages for shape, wedge and crown,

(F₇出口带材楔形) ${ΔWedge}_{7}^{MEAS} (T) = h_{WS}^{MEAS} (T) - h_{DS}^{MEAS} (T) - - - (3)$ (F ₇ outlet strip wedge) ${ΔWedge}_{7}^{MEAS} (T) = h_{WS}^{MEAS} (T) - h_{DS}^{MEAS} (T) - - - (3)$

(F₇出口楔形偏差) $Δ C_{7}^{Wedge} (T) = \frac{1}{2} \cdot Δ {Wedge}_{7}^{MEAS} (T) - - - (4)$ (F ₇ outlet wedge deviation) $Δ C_{7}^{Wedge} (T) = \frac{1}{2} &Center Dot; Δ {Wedge}_{7}^{MEAS} (T) - - - (4)$

其中，

(mm)是F₇出口的楔形偏差，通常目标值是0。in,

(mm) is the wedge deviation of F ₇ outlet, usually the target value is 0.

(步骤4)楔形偏差分配：F₇出口楔形偏差(mm)通过精轧机F₁-F₇机架的水平调整来消除，具体步骤为：(Step 4) Wedge Deviation Assignment: F ₇ Exit Wedge Deviation (mm) to be eliminated by adjusting the level of F ₁ -F ₇ stands of the finishing mill, the specific steps are:

首先，板形(凸度和平直度)设定计算(SSUC)将会计算每个机架出口目标带材凸度以得到精轧出口目标带材凸度，First, the shape (convexity and flatness) setting calculation (SSUC) will calculate the target strip crown at the exit of each stand to obtain the target strip crown at the exit of the finish rolling,

$\frac{{C C}_{i i}^{REF REF}}{{h h}_{i i}} = = {K K}_{i i} \cdot &Center Dot; \frac{{C C}_{77}^{REF REF}}{{h h}_{77}} - - - - - - ((55))$

其中，是精轧出口目标带材凸度(mm)，h₇是精轧出口厚度(轧机设定计算值)，i是机架号(1，2，3，4，5，6)，K_i是单位带材凸度系数。由(SSUC)计算出目标机架出口带材凸度，由(MSUC)计算出的机架出口带材厚度得出K_i，例如，K_i＝1.0(i＝1，2，3，4，5，6)时，所有精轧机的C_i/h_i值(i机架出口凸度除出口厚度)都相同，通过方程(5)，F₇出口带材楔形偏差

(mm)被分散到每个精轧机架，那就是，in, is the target strip crown (mm) at the finish rolling exit, h ₇ is the finish rolling exit thickness (calculated value of rolling mill setting), i is the frame number (1, 2, 3, 4, 5, 6), K _i is Unit strip crown coefficient. Calculate the target frame exit strip convexity by (SSUC), and obtain K _i from the frame exit strip thickness calculated by (MSUC), for example, K _i =1.0 (i=1, 2, 3, 4, 5, 6), the values of C _i /h _i (i stand exit crown minus exit thickness) of all finishing mills are the same, through equation (5), F ₇ exit strip wedge deviation

(mm) is distributed to each finishing stand, that is,

$\frac{Δ Δ {C C}_{i i}^{Wedge Wedge} ((T T))}{{h h}_{i i}} = = {K K}_{i i} \cdot \cdot \frac{Δ Δ {C C}_{77}^{Wedge Wedge} ((T T))}{{h h}_{77}} - - - - - - ((66))$

其中，(i＝1，2，3，4，5，6)，

(mm)是i机架出口带材楔形修正值，在最后一个机架F₇，机架出口楔形修正值是

where, (i=1, 2, 3, 4, 5, 6),

(mm) is the strip wedge correction value at the exit of frame i, and at the last frame F ₇ , the exit wedge correction value of the frame is

(步骤5)每个机架辊缝调平控制量：辊缝调平的基本楔形控制方程是：(Step 5) Roll Gap Leveling Control Amount for Each Rack: The basic wedge control equation for roll gap leveling is:

$Δ Δ {C C}_{i i}^{Wedge Wedge} ((T T)) = = {α α}_{i i}^{L L} ((T T)) \cdot &Center Dot; ΔL Δ L + + {η η}_{i i} ((T T)) \cdot \cdot Δ Δ {C C}_{((i i - - 11))}^{Wedge Wedge} ((T T)) - - - - - - ((77))$

其中，i＝1，2…..，7Among them, i=1, 2..., 7

(mm)：由方程(6)给出，

是带材边缘T(mm)处辊缝调平对带材楔形的影响系数，η_i(T)是带材楔形继承系数(对于F₁，

(mm)是中间坯楔形)，ΔL(mm)是辊缝调平值，其中公式7中其他几项已知，可以求出ΔL；

(mm): given by equation (6),

is the influence coefficient of roll gap leveling at the strip edge T (mm) on the strip wedge, η _i (T) is the strip wedge inheritance coefficient (for F ₁ ,

(mm) is the wedge shape of the intermediate billet), ΔL (mm) is the roll gap leveling value, where other items in formula 7 are known, and ΔL can be obtained;

根据以上第1-5步骤，ASCC系统完成楔形调整工作。According to the above steps 1-5, the ASCC system completes the wedge adjustment.

(步骤6)带材凸度测量和控制：当带材头部到达精轧机出口的板形仪时，带材板形、楔形和凸度进行定时测量。ASCC(PLC)即时计算出带材板形、楔形和凸度的数据平均值，精轧出口带材凸度的测量值平均值

(mm)是(Step 6) Strip crown measurement and control: When the strip head reaches the shape meter at the exit of the finishing mill, the strip shape, wedge shape and crown are measured regularly. ASCC (PLC) calculates the average value of strip shape, wedge shape and crown in real time, and the average value of measured value of strip crown at the exit of finishing rolling

(mm) is

${C C}_{77}^{R R,, MEAS MEAS} ((T T)) = = {h h}_{C C}^{MEAS MEAS} - - \frac{{h h}_{WS WS}^{MEAS MEAS} ((T T)) + + {h h}_{DS DS}^{MEAS MEAS} ((T T))}{22} - - - - - - ((88))$

其中，

(mm)是测量出的宽度中心厚度值，

(mm)是测量出的工作侧宽度边缘T(mm)处的厚度值，

(mm)是测量出的传动侧宽度边缘厚度值。in,

(mm) is the measured width center thickness value,

(mm) is the measured thickness value at the working side width edge T (mm),

(mm) is the measured drive side width edge thickness value.

(步骤7)末机架F6带材凸度偏差计算：通过方程(8)，得出精轧出口带材凸度偏差

(mm)是(Step 7) Calculation of the strip crown deviation of the last stand F6: through equation (8), the strip crown deviation at the exit of the finish rolling is obtained

(mm) is

$Δ Δ {C C}_{((77))}^{R R} ((T T)) = = {C C}_{77}^{R R,, MEAS MEAS} ((T T)) - - {C C}_{77}^{R R,, REF REF} ((T T)) - - - - - - ((99))$

其中，

(mm)是目标(REF，参考)F₇出口带材凸度。in,

(mm) is the target (REF, reference) F ₇ exit strip crown.

(步骤8)凸度偏差分配：F₇机架出口带材凸度偏差，通过调整所有机架的工作辊弯辊力来消除。这对保持良好的带钢平直度至关重要，所以，步骤4方程式(5)里定义的比例凸度系数K_i非常重要，精轧出口带材凸度偏差(mm)通过方程(5)被分配到各个精轧机架，(Step 8) Allocation of crown deviation: The exit strip crown deviation of the _F7 rack is eliminated by adjusting the bending force of the work rolls of all racks. This is very important to maintain a good strip flatness, so the proportional crown coefficient K _i defined in the step 4 equation (5) is very important, and the crown deviation of the finished strip exit (mm) is distributed to each finishing stand by equation (5),

$\frac{Δ Δ {C C}_{i i}^{R R} ((T T))}{{h h}_{i i}} = = {K K}_{i i} \cdot &Center Dot; \frac{Δ Δ {C C}_{77}^{R R} ((T T))}{{h h}_{77}} - - - - - - ((1010))$

其中，机架号是(i＝1，2，---，6).h(mm)是机架出口带材厚度，K_i比例凸度系数，各机架出口带材凸度修正值

(mm)可以通过方程式(10)计算得出，F₇出口带材凸度修正值是

(mm)。Among them, the rack number is (i=1, 2, ---, 6). h (mm) is the thickness of the strip at the exit of the rack, K _i proportional crown coefficient, and the correction value of the strip crown at the exit of each rack

(mm) can be calculated by Equation (10), F ₇ export strip crown correction value is

(mm).

(步骤9)各机架工作辊弯曲力调整值：每个机架工作辊弯曲力控制值ΔF_i(ton/side)由以下公式决定：(Step 9) Bending force adjustment value of the working rolls of each rack: the bending force control value ΔF _i (ton/side) of the working rolls of each rack is determined by the following formula:

$Δ Δ {C C}_{i i}^{R R} ((T T)) = = {α α}_{i i}^{B B} ((T T)) \cdot &Center Dot; {ΔF ΔF}_{i i} + + {η η}_{i i} ((T T)) \cdot &Center Dot; Δ Δ {C C}_{((i i - - 11))}^{R R} ((T T)) - - - - - - ((1111))$

其中，机架号是(i＝1，2，---6，7)，

是带材凸度对工作辊弯曲力的影响系数，η(T)是带材凸度继承系数；在方程(11)，由方程(10)给出(假定中间坯比例凸度变化为0)，那么，每个工作辊弯曲力控制值ΔF_i(ton/side)是，Among them, the rack number is (i=1, 2, ---6, 7),

is the influence coefficient of the strip crown on the bending force of the work roll, and η(T) is the inheritance coefficient of the strip crown; in equation (11), Given by equation (10) (assuming that the proportional crown change of the intermediate billet is 0), then, the bending force control value ΔF _i (ton/side) of each work roll is,

${ΔF ΔF}_{i i} = = \frac{11}{{α α}_{i i}^{B B} ((T T))} \cdot &Center Dot; ((Δ Δ {C C}_{i i}^{R R} ((T T)) - - {η η}_{i i} ((T T)) \cdot &Center Dot; Δ Δ {C C}_{((i i - - 11))}^{R R} ((T T)))) - - - - - - ((1212))$

其中，机架号是(i＝1，2，---6，7)，Among them, the rack number is (i=1, 2, ---6, 7),

代入 $Δ F_{i}^{CTL} = {ΔF}_{i} - - - (13) .$ substitute $Δ f_{i}^{CTL} = {ΔF}_{i} - - - (13) .$

需要说明的是每个机架工作辊弯曲力控制值

(i＝1，2，--6，7)可被存储在ASCC中。What needs to be explained is that the bending force control value of each rack work roll

(i=1, 2, -6, 7) can be stored in ASCC.

如图6所示，辊缝调平控制输出被加入到液压辊缝控制，工作辊弯辊力控制被加入到工作辊弯辊调整系统。As shown in Figure 6, the roll gap leveling control output is added to the hydraulic roll gap control, and the work roll bending force control is added to the work roll bending adjustment system.

上述过程中，当带材头部到达精轧出口的板形仪时，进行第一轮测量，比如，可采用每秒测量一次带材楔形和凸度的方式，测量三次，计算控制值，并立刻将这些控制值加入到轧机，然后等待控制生效；In the above process, when the head of the strip reaches the shape meter at the finish rolling exit, the first round of measurement is carried out. For example, the wedge shape and crown of the strip can be measured once per second, measured three times, and the control value is calculated. Immediately add these control values to the rolling mill, and then wait for the control to take effect;

其后，在带材上设置若干跟踪控制点，如，对于跟踪控制点F1，当它随后到达精轧出口的板形仪时，第二轮测量开始，每秒钟测一次，总共测量三次，并且计算出控制值，这些控制值随后也即刻被加入到轧机；Thereafter, a number of tracking control points are set on the strip, such as, for tracking control point F1, when it arrives at the shape meter at the exit of finishing rolling, the second round of measurement starts, once per second, and measures three times in total. And the control values are calculated, which are also immediately added to the rolling mill;

类似地，这些测量和控制(从步骤-3到步骤-11)不断重复直到中间坯尾部被飞剪切割。Similarly, these measurements and controls (from step-3 to step-11) are repeated until the tail of the intermediate billet is cut by the flying shears.

需要说明的是，在ASCC生效期间，如果操作工要人工干预辊缝调平，ASCC输出一直保持(没有增加输出)。人工干预完成后，ASCC输出被提供到轧机。It should be noted that during the effective period of ASCC, if the operator wants to manually intervene in the roll gap leveling, the output of ASCC will always be maintained (the output will not be increased). After the manual intervention is completed, the ASCC output is provided to the mill.

同时，ASCC与精轧机中控制部件及板形仪等系采用联锁装置链接，只有当以下条件满足时，ASCC输出呈打开状态：At the same time, the ASCC is connected with the control components and the shape meter in the finishing mill by an interlocking device. Only when the following conditions are met, the ASCC output is in the open state:

精轧机在轧制(没有换辊)；精轧所有机架的轧辊辊缝调整系统正常；精轧所有机架的工作辊弯辊调整系统正常；精轧出口的板形仪正常；轧机设定计算(辊缝、辊速)是正常终结；板形设定计算(CVC串辊、工作辊弯曲)是正常终结。The finishing mill is rolling (no roll change); the roll gap adjustment system of all the finishing stands is normal; the work roll bending adjustment system of all the finishing stands is normal; the flatness gauge at the finish rolling exit is normal; the mill setting The calculation (roll gap, roll speed) is the normal end; the shape setting calculation (CVC string roll, work roll bending) is the normal end.

此外，ASCC具有辊缝调平值记忆及坯与坯学习功能，即精轧所有机架F1，F2…F6，F7的辊缝调平值，在带钢进行切尾时自动存储为下块钢的辊缝预设值，但在轧机换辊后所有辊缝调平值自动清零。In addition, ASCC has the memory of roll gap leveling value and billet and billet learning function, that is, the roll gap leveling value of all stands F1, F2...F6, F7 in the finish rolling is automatically stored as the next piece of steel when the strip is trimmed The preset value of the roll gap, but all the roll gap leveling values are automatically cleared after the roll is changed in the rolling mill.

以下以一种规格的带钢轧制工艺举例进一步说明本发明的技术方案：The technical scheme of the present invention is further described by way of example with a kind of strip rolling process of specification:

假设轧制规格如下：Assume that the rolling specifications are as follows:

钢种steel type 宽度width 厚度 thickness 辊身长度Roll body length 楔形允许偏差Wedge tolerance 凸度允许偏差(F₇出口)Convexity allowable deviation (F ₇ exit) SS400SS400 1250mm1250mm 2.5mm2.5mm 1700mm1700mm 00 0.03±0.005mm0.03±0.005mm

轧制规程表按如下设定：The rolling schedule is set as follows:

barbar F1F1 F2F2 F3F3 F4F4 F5F5 F6F6 F7F7 厚度(mm)Thickness (mm) 40.0040.00 21.6021.60 12.2512.25 7.167.16 4.554.55 3.163.16 2.362.36 2.002.00 压下率(％)Reduction rate (%) 46.00％46.00% 43.30％43.30% 41.50％41.50% 36.50％36.50% 30.50％30.50% 25.50％25.50% 15.00％15.00%

则：(1)楔形自动控制计算Then: (1) Wedge automatic control calculation

假设F₇出口检测到的带钢楔形是

根据以上公式，需要将调平值分配到各机架，按照本发明的计算步骤演算如下：Assume that the strip wedge detected at exit F ₇ is

According to the above formula, the leveling value needs to be distributed to each rack, and the calculation steps according to the present invention are calculated as follows:

(F₇出口带材楔形) ${ΔWedge}_{7}^{MEAS} (T) = h_{WS}^{MEAS} (T) - h_{DS}^{MEAS} (T) = 0.05 mm - - - (3)$ (F ₇ outlet strip wedge) ${ΔWedge}_{7}^{MEAS} (T) = h_{WS}^{MEAS} (T) - h_{DS}^{MEAS} (T) = 0.05 mm - - - (3)$

(F₇出口楔形偏差) $Δ C_{7}^{Wedge} (T) = \frac{1}{2} Δ {Wedge}_{7}^{MEAS} (T) = 0.025 mm - - - (4)$ (F ₇ outlet wedge deviation) $Δ C_{7}^{Wedge} (T) = \frac{1}{2} Δ {Wedge}_{7}^{MEAS} (T) = 0.025 mm - - - (4)$

以上楔形偏差将按如下公式调整分配到各机架：The above wedge deviation will be adjusted and distributed to each rack according to the following formula:

对于F₁机架，把中间坯楔形设为0，然后从方程(7)得出For the F ₁ frame, set the wedge shape of the intermediate billet as 0, and then obtain from equation (7)

$Δ Δ {C C}_{11}^{Wedge Wedge} ((T T)) = = {α α}_{11}^{L L} ((T T)) \cdot \cdot {ΔL Δ L}_{11}$

(mm)由方程(6)得出

(mm) from equation (6)

$\frac{Δ Δ {C C}_{i i}^{Wedge Wedge} ((T T))}{{h h}_{i i}} = = {K K}_{i i} \cdot &Center Dot; \frac{Δ Δ {C C}_{77}^{Wedge Wedge} ((T T))}{{h h}_{77}} - - - - - - ((66))$

假定K_i为1.1Assume K _i is 1.1

$Δ Δ {C C}_{11}^{Wedge Wedge} ((T T)) = = 21.6 21.6 \times \times 1.1 1.1 \times \times 0.025 0.025 \div \div 2.0 2.0 = = 0.297 0.297 mm mm$

那么辊缝调平控制值ΔL₁(mm)是(假定

)Then the roll gap leveling control value ΔL ₁ (mm) is (assuming

)

$Δ Δ {L L}_{11} = = \frac{11}{{a a}_{11}^{L L} ((T T))} \cdot &Center Dot; Δ Δ {C C}_{11}^{Wedge Wedge} ((T T)) = = 1.5 1.5 \times \times 0.297 0.297 = = 0.39 0.39 mm mm - - - - - - ((88))$

代入 $Δ L_{1}^{CTL} = {ΔL}_{1} = 0.39 mm - - - (9)$ substitute $Δ L_{1}^{CTL} = {ΔL}_{1} = 0.39 mm - - - (9)$

在K_i、

等系数已知的情况下，按照以上计算步骤，可以求出精轧机其他架次的辊缝调平值。In K _i ,

When the equal coefficients are known, according to the above calculation steps, the roll gap leveling value of other racks of the finishing mill can be obtained.

(2)凸度自动控制计算(2) Convexity automatic control calculation

假设F₇出口检测到的带钢凸度是

根据以上公式，需要将凸度调整值分配到各机架，按照本发明的计算步骤演算如下：Assume that the strip convexity detected at the exit of F ₇ is

According to the above formula, the crown adjustment value needs to be distributed to each rack, and the calculation steps according to the present invention are calculated as follows:

精轧出口带材凸度的测量值平均值

(mm)是Average value of measured values of strip crown at the exit of finish rolling

(mm) is

${C C}_{77}^{R R,, MEAS MEAS} ((T T)) = = {h h}_{C C}^{MEAS MEAS} - - \frac{{h h}_{WS WS}^{MEAS MEAS} ((T T)) + + {h h}_{DS DS}^{MEAS MEAS} ((T T))}{22} = = 0.045 0.045 - - - - - - ((1717))$

通过方程(17)，得出精轧出口带材凸度偏差

(mm)是Through Equation (17), the crown deviation of the exit strip of finishing rolling is obtained

(mm) is

$Δ Δ {C C}_{77}^{R R} ((T T)) = = {C C}_{77}^{R R,, MEAS MEAS} ((T T)) - - {C C}_{77}^{R R,, REF REF} ((T T)) = = 0.045 0.045 - - 0.035 0.035 = = 0.01 0.01 mm mm - - - - - - ((1818))$

精轧出口带材凸度偏差0.01(mm)通过方程(19)被分配到各个精轧机架Finished exit strip crown deviation 0.01 (mm) is distributed to each finishing stand through equation (19)

$\frac{Δ Δ {C C}_{i i}^{R R} ((T T))}{{h h}_{i i}} = = {K K}_{i i} \cdot \cdot \frac{Δ Δ {C C}_{77}^{R R} ((T T))}{{h h}_{77}} - - - - - - ((1919))$

如想求出F₁的凸度调节量，假定K₁＝1.0，则If you want to find the convexity adjustment amount of F ₁ , assuming K ₁ = 1.0, then

F₁凸度调节量＝21.6÷2.0×1.0×0.01＝0.108mmF ₁ Convexity adjustment amount＝21.6÷2.0×1.0×0.01＝0.108mm

如折算成弯辊力，则根据下面公式：If converted into bending force, according to the following formula:

$Δ Δ {C C}_{i i}^{R R} ((T T)) = = {α α}_{i i}^{B B} ((T T)) \cdot \cdot {ΔF ΔF}_{i i} + + {η η}_{i i} ((T T)) \cdot &Center Dot; Δ Δ {C C}_{((i i - - 11))}^{R R} ((T T)) - - - - - - ((2020))$

在方程(20)，由方程(19)算出-0.108mm(假定中间坯比例凸度变化为0)。In equation (20), -0.108mm is calculated from equation (19) (assuming that the proportional convexity change of the intermediate billet is 0).

那么，每个工作辊弯曲力控制值ΔF_i(ton/side)是，Then, each work roll bending force control value ΔF _i (ton/side) is,

$Δ Δ {F f}_{i i} = = \frac{11}{{α α}_{i i}^{B B} ((T T))} \cdot \cdot ((Δ Δ {C C}_{i i}^{R R} ((T T)) - - {η η}_{i i} ((T T)) \cdot &Center Dot; Δ Δ {C C}_{((i i - - 11))}^{R R} ((T T)))) - - - - - - ((21 twenty one))$

假定F₁的带钢凸度对轧辊凸度的影响系数为-0.00035mm/KN，则：Assuming that the influence coefficient of the strip crown of F ₁ on the roll crown is -0.00035mm/KN, then:

$Δ Δ {F f}_{i i}^{CTL CTL} = = Δ Δ {F f}_{i i} = = \frac{11}{{α α}_{i i}^{B B} ((T T))} \times \times Δ Δ {C C}_{i i}^{R R} ((T T)) = = ((- - 0.108 0.108 mm mm)) \div \div ((- - 0.00035 0.00035 mm mm / / KN KN)) = = 309309 KN KN - - - - - - ((22 twenty two))$

根据以上，当F₇出口出现+0.01mm的凸度偏差时，需要F₁进行正弯，弯辊力为309KN/侧。至于其他机架的弯辊力调整按照公式和相关系数求出当机架的弯辊力调整值。According to the above, when there is a convexity deviation of +0.01mm at the exit of F ₇ , F ₁ needs to be bent forward, and the bending force is 309KN/side. As for the adjustment of the bending force of other racks, the adjustment value of the bending force of the current rack is obtained according to the formula and related coefficients.

上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A crown and/or wedge-shaped automatic control system of a hot-rolling tandem mill, which is applied to a hot-rolling tandem mill mainly composed of several finishing stands arranged in series, and each finishing stand is equipped with a working The roll bending adjustment system and the roll gap adjustment system are characterized in that:

The crown and/or wedge automatic control system includes a crown and/or wedge control device, and the crown and/or wedge control device is connected with the work roll bending adjustment system and the roll gap adjustment system on each finishing stand It is respectively connected with the strip shape and wedge shape and/or crown measuring device arranged at the finish rolling exit;

And, described convexity and/or wedge-shape control device can be according to strip material strip shape and wedge-shape and/or convexity measurement device timing measured strip plate shape and wedge-shape and/or convexity data and target wedge-shape and/or convexity The difference obtained by comparing the degree data is adjusted through the work roll bending adjustment system and the roll gap adjustment system on each finishing stand to adjust the roll gap and work roll bending force of each finishing stand to realize the long-axis direction of the strip. Automatic crown and/or wedge control.

2. The crown and/or wedge automatic control system of a hot rolling tandem mill according to claim 1, characterized in that: the crown and/or wedge control device is controlled by a roll gap leveling control switch and a work roll The roll bending force control switch is connected with the roll gap adjustment system and the work roll bending adjustment system;

When the strip head reaches the measuring device of the shape meter, the work roll bending force control switch is closed, and the work roll bending adjustment system starts to work. When the strip tail is cut by flying shear, the work roll bending force control switch is turned off. open, the work roll bending adjustment system stops working;

When the head of the strip enters the ground and is coiled and stretched, the roll gap leveling control switch is closed, and the roll gap adjustment system starts to work. When the strip tail is cut by flying shears, the roll gap leveling control switch is turned off. The roll gap adjustment system stops working.

3. The crown and/or wedge automatic control system of a hot rolling tandem mill according to claim 2, characterized in that: the roll gap leveling control switch and the work roll bending force control switch are respectively controlled by a control unit. A switch is connected to the crown and/or wedge control.

4. The crown and/or wedge automatic control system of a hot rolling tandem mill according to claim 1, characterized in that: the crown and/or wedge control device, strip shape and wedge and/or convex The degree measuring device, the work roll bending adjustment system and the roll gap adjustment system are all connected by an interlocking device.

5. The crown and/or wedge-shaped automatic control system of the hot rolling tandem mill according to claim 1, characterized in that: the process of realizing the automatic wedge-shaped control in the long axis direction of the strip is:

(1) Pre-input of influence coefficient and inheritance coefficient: Calculate the influence coefficient and inheritance coefficient offline according to the deformation of the rolling mill, roll and strip, and input these influence coefficients and inheritance coefficients into the crown and/or wedge control device;

(2) Input data to the crown and/or wedge control device: complete the rolling mill setting calculation and the plate shape setting calculation, and then input the obtained calculation results and strip characteristic information into the crown and/or wedge control device;

(3) Convexity and/or wedge shape control device Plate shape, wedge shape, and crown measurement: When the strip head reaches the exit of the finishing mill, the strip shape, wedge shape, and crown are measured regularly, and the crown and/or wedge shape control The device calculates the average value of strip shape, wedge shape and convexity data in real time, among which, the strip wedge shape at the exit of the finishing mill

From the following formula, that is,

Δ Δ {Wedge Wedge}_{M m}^{MEAS MEAS} ((T T)) = = {h h}_{WS WS}^{MEAS MEAS} ((T T)) - - {h h}_{Ds Ds}^{MEAS MEAS} ((T T))

in,

is the measured thickness of the strip at the working side width edge,

is the measured strip drive side width edge thickness value;

and

Δ C_{m}^{Wedge} (T) = \frac{1}{2} \cdot Δ {Wedge}_{m}^{MEAS} (T)

The steps are specifically:

Firstly, the shape setting calculation calculates the target strip crown at the exit of each rack to obtain the target strip crown at the exit of finishing rolling and target rack outlet strip crown

And the unit strip crown coefficient Ki is calculated by the following formula,

\frac{{C C}_{i i}^{REF REF}}{{h h}_{i i}} = = {K K}_{i i} \cdot \cdot \frac{{C C}_{M m}^{REF REF}}{{h h}_{M m}}

Wherein, h _M is the exit thickness of finish rolling, which is the calculation value of rolling mill setting, i is the rack number, and i=1, 2, ... M, M is a natural number;

Secondly, through the following formula, the wedge-shaped deviation of the strip exiting the finishing mill

distributed to each finishing stand, i.e.,

\frac{Δ Δ {C C}_{i i}^{Wedge Wedge} ((T T))}{{h h}_{i i}} = = {K K}_{i i} \cdot &Center Dot; \frac{Δ Δ {C C}_{M m}^{Wedge Wedge} ((T T))}{{h h}_{M m}}

in,

is the strip wedge correction value at the outlet of frame i;

(5) Leveling and controlling the roll gap of each rack: the roll gap leveling value ΔL can be obtained by the following formula, namely,

Δ Δ {C C}_{i i}^{Wedge Wedge} ((T T)) = = {α α}_{i i}^{L L} ((T T)) \cdot &Center Dot; ΔL Δ L + + {η η}_{i i} ((T T)) \cdot &Center Dot; Δ Δ {C C}_{((i i - - 11))}^{Wedge Wedge} ((T T))

in,

Through the above steps, the wedge adjustment work is completed.

6. The crown and/or wedge-shaped automatic control system of a hot rolling tandem mill according to claim 1, characterized in that: the process of realizing automatic crown control in the long axis direction of the strip is:

(1) Strip crown measurement and control: When the strip head arrives at the exit of the finishing mill, the strip shape, wedge and crown are measured regularly, and the strip profile is calculated in real time by the crown and/or wedge control device. Average value of data for shape, wedge and crown, where the average value of measured values for strip crown at the exit of finish rolling

It is derived from the following formula:

{C C}_{M m}^{R R,, MEAS MEAS} ((T T)) = = {h h}_{C C}^{MEAS MEAS} - - \frac{{h h}_{WS WS}^{MEAS MEAS} ((T T)) + + {h h}_{DS DS}^{MEAS MEAS} ((T T))}{22}

In the above formula,

is the measured strip width center thickness value, is the measured thickness of the strip at the working side width edge, is the measured strip drive side width edge thickness value;

(2) Calculation of strip crown deviation at the end stand: calculate the crown deviation of the finished rolling exit strip according to the following formula

Right now,

Δ Δ {C C}_{((M m))}^{R R} ((T T)) = = {C C}_{M m}^{R R,, MEAS MEAS} ((T T)) - - {C C}_{M m}^{R R,, REF REF} ((T T))

in, is the target finish rolling exit strip crown;

(3) Allocation of crown deviation: the crown deviation of the exit strip after finishing rolling

assigned to each rack by the following formula, namely,

\frac{Δ Δ {C C}_{i i}^{R R} ((T T))}{{h h}_{i i}} = = {K K}_{i i} \cdot &Center Dot; \frac{Δ Δ {C C}_{M m}^{R R} ((T T))}{{h h}_{M m}}

Wherein, i is the frame number, and i=1, 2, ... M, M is a natural number, h _i is the i-th frame outlet strip thickness, K _i is the proportional crown coefficient,

That is, the strip crown correction value at the outlet of each rack,

It is also the crown correction value of the exit strip of finishing rolling;

(4) Adjustment of the bending force of the work rolls of each rack:

Calculate the bending force control value ΔF _i (ton/side) of each rack work roll by the following formula:

{ΔF ΔF}_{i i} = = - - \frac{11}{{α α}_{i i}^{B B} ((T T))} \cdot &Center Dot; ((Δ Δ {C C}_{i i}^{R R} ((T T)) - - {η η}_{i i} ((T T)) \cdot \cdot Δ Δ {C C}_{((i i - - 11))}^{R R} ((T T))))

and

Δ C_{i}^{R} (T) = α_{i}^{B} (T) &Center Dot; Δ f_{i} + η_{i} (T) &Center Dot; Δ C_{(i - 1)}^{R} (T)

in, is the influence coefficient of the strip crown on the bending force of the work roll, η(T) is the inheritance coefficient of the strip crown, substituted into

Δ Δ {F f}_{i i}^{CTL CTL} = = {ΔF ΔF}_{i i}

That is, the control value of the bending force of each rack work roll is obtained

Through the above steps, the convexity adjustment work is completed.

7. The crown and/or wedge automatic control system of a hot rolling tandem mill according to claim 1 or 4, characterized in that: the strip shape and wedge and/or crown measuring device comprises a shape meter , wedge and/or crown gauges.

8. The crown and/or wedge automatic control system of a hot rolling tandem mill according to any one of claims 1 to 6, characterized in that the crown and/or wedge control device adopts programmable logic control device.

9. A crown and/or wedge-shaped automatic control method of a hot rolling tandem mill, characterized in that, the method is:

During the strip rolling process, the crown and/or wedge of the rolled piece is dynamically detected, and the detected crown and/or wedge of the rolled piece is compared with the target crown and/or wedge of the target, and then according to the actual strip The deviation value of the steel crown and/or wedge shape from the target crown and/or target wedge shape, adjust the roll gap and work roll bending force in each finishing mill respectively, and realize the automatic straightening of the rolled piece in the long axis direction degree as well as crown and/or wedge control.

10. The method for automatically controlling the crown and/or wedge shape of a hot-rolled tandem mill according to claim 9, characterized in that: when the head of the strip reaches the shape meter measuring device, the work roll bending force is started. Adjustment, when the tail of the strip is cut by the flying shear, the adjustment of the bending force of the work roll is stopped, so as to realize automatic crown control.

11. The method for automatically controlling the crown and/or wedge shape of a hot-rolled tandem mill according to claim 9, characterized in that: when the head of the strip enters the ground for coiling and the tension is established, the roll gap adjustment is started , When the tail of the strip is cut by the flying shear, the roll gap adjustment is stopped, so as to realize the automatic wedge control.

12. The method for automatically controlling crown and/or wedge shape of a hot rolling tandem mill according to claim 9 or 11, characterized in that: the process of realizing automatic wedge shape control is:

(1) Pre-input of influence coefficient and inheritance coefficient: calculate influence coefficient and inheritance coefficient offline according to rolling mill, roll and strip deformation, and input these influence coefficients and inheritance coefficient into a crown and/or wedge control device;

From the following formula, that is,

Δ Δ {Wedge Wedge}_{M m}^{MEAS MEAS} ((T T)) = = {h h}_{WS WS}^{MEAS MEAS} ((T T)) - - {h h}_{DS DS}^{MEAS MEAS} ((T T))

in,

is the measured thickness of the strip at the working side width edge,

is the measured strip drive side width edge thickness value;

and

Δ C_{m}^{Wedge} (T) = \frac{1}{2} &Center Dot; Δ {Wedge}_{m}^{MEAS} (T)

The steps are specifically:

Firstly, the shape setting calculation calculates the target strip crown at the exit of each rack to obtain the target strip crown at the exit of finishing rolling

and target rack outlet strip crown

And calculate the unit strip crown coefficient K _i by the following formula,

\frac{{C C}_{i i}^{REF REF}}{{h h}_{i i}} = = {K K}_{i i} \cdot \cdot \frac{{C C}_{M m}^{REF REF}}{{h h}_{M m}}

distributed to each finishing stand, i.e.,

\frac{Δ Δ {C C}_{i i}^{Wedge Wedge} ((T T))}{{h h}_{i i}} = = {K K}_{i i} \cdot \cdot \frac{Δ Δ {C C}_{M m}^{Wedge Wedge} ((T T))}{{h h}_{M m}}

in,

is the strip wedge correction value at the outlet of frame i;

Δ Δ {C C}_{i i}^{Wedge Wedge} ((T T)) = = {α α}_{i i}^{L L} ((T T)) \cdot \cdot ΔL ΔL + + {η η}_{i i} ((T T)) \cdot \cdot Δ Δ {C C}_{((i i - - 11))}^{Wedge Wedge} ((T T))

in,

Through the above steps, the wedge adjustment work is completed.

13. The crown and/or wedge-shaped automatic control method of a hot-rolled tandem mill according to claim 12, characterized in that: in the method, the roll gap leveling values of all finishing stands are equal to those of the last strip steel When the tail is cut, it is automatically stored as the preset value of the roll gap of the next strip, and all the roll gap leveling values are automatically cleared after the rolling mill changes rolls.

14. The method for automatically controlling crown and/or wedge shape of a hot-rolled tandem mill according to claim 9 or 10, characterized in that: the process of realizing automatic crown control is:

(1) Strip crown measurement and control: When the strip head arrives at the exit of the finishing mill, the strip shape, wedge and crown are measured regularly, and a crown and/or wedge control device calculates the strip profile in real time. The average value of the data of flat shape, wedge shape and crown, among them, the average value of measured value of strip crown at the exit of finishing rolling

It is derived from the following formula:

{C C}_{M m}^{R R,, MEAS MEAS} ((T T)) = = {h h}_{C C}^{MEAS MEAS} - - \frac{{h h}_{WS WS}^{MEAS MEAS} ((T T)) + + {h h}_{DS DS}^{MEAS MEAS} ((T T))}{22}

In the above formula,

is the measured strip width center thickness value,

is the measured thickness of the strip at the working side width edge, is the measured strip drive side width edge thickness value;

(2) Calculation of the crown deviation of the strip at the end stand: calculate the crown deviation of the finished rolling exit strip according to the following formula