TWI760085B

TWI760085B - Shape control system for rolled material

Info

Publication number: TWI760085B
Application number: TW110103065A
Authority: TW
Inventors: 新居稔大
Original assignee: 日商東芝三菱電機產業系統股份有限公司
Priority date: 2020-12-21
Filing date: 2021-01-27
Publication date: 2022-04-01
Also published as: JP2022097976A; TW202224804A; JP7447779B2

Abstract

An object of the present invention is to provide a system capable of maintaining the actual shape in the target shape by appropriate switching of the state of the valve of the coolant spray, even in a case that a reversal phenomenon happens. In the system, a coolant level control which corrects a level is performed, wherein the level determines a ratio of a maintaining time of the valve in an on state to a control period of shape control. In the coolant level control, a first restriction or a second restriction is chosen, based on a comparison of a target thickness of the rolled material and a thickness threshold. The difference between the first restriction and the second restriction is that the second restriction restricts a degradation of a corrected level to a lower level more strictly than the first restriction. Furthermore, in the coolant level control, a prediction model is used to determine whether the reversal phenomenon will happen. In the case that the determination result is that the reversal phenomenon will happen, it is determined whether the target thickness is higher than the thickness threshold. In the case that the former is higher than the latter, the thickness threshold is updated by the target thickness in the zone which is determined that the reversal phenomenon will happen.

Description

軋延材的形狀控制系統 Shape Control System for Rolled Products

本發明係關於一種控制金屬箔等之軋延材的平坦度的形狀控制系統。 The present invention relates to a shape control system for controlling the flatness of rolled materials such as metal foils.

在一般性的軋延材的形狀控制中，係根據形狀偏差來設定致動器(actuator)的操作量。形狀偏差係指藉由形狀計所獲得之軋延材的實際形狀、與目標形狀的差。形狀計係沿著軋輥的體長方向劃分複數個量測區域。也就是，依每個量測區域獲得實際形狀。形狀偏差的計算也是依每個量測區域進行。 In general shape control of a rolled material, the operation amount of an actuator is set according to the shape deviation. The shape deviation refers to the difference between the actual shape of the rolled material obtained by the shape meter and the target shape. The shape meter divides a plurality of measurement areas along the body length direction of the roll. That is, the actual shape is obtained for each measurement area. The calculation of the shape deviation is also carried out for each measurement area.

就致動器而言，可例示軋輥彎曲機(roll bender)、水平調整機及冷卻劑噴灑器。軋輥彎曲機係變更軋輥的彎曲，藉此修正形狀偏差。水平調整機係藉由左右之輥隙差的操作來修正形狀偏差。冷卻劑噴灑器係配置於每個測量區域。這些冷卻劑噴灑器係各自具有在導通狀態及關斷狀態之間切換的閥門。藉由個別地進行上述閥門的切換，冷卻劑噴灑器係進行形狀偏差的修正。 As for the actuators, roll benders, levelers and coolant sprayers can be exemplified. A roll bending machine corrects the shape deviation by changing the bending of the roll. The leveling machine corrects the shape deviation by operating the difference between the left and right roll gaps. Coolant sprinklers are arranged in each measurement area. These coolant sprinklers each have a valve that switches between an on state and an off state. By individually switching the above-mentioned valves, the coolant sprinkler corrects the shape deviation.

在鋁或銅等的箔軋延，上下的工作輥會有在比板寬方向的材料端部還靠外側進行接觸的情形。這樣的情形中，以軋輥彎曲機及水平調整機係難以高精度地修正形狀偏差。因此，在箔軋延中，由冷卻劑噴灑器所為的形狀控制就會比由軋輥彎曲機及水平調整機所為的形狀控制還更為重要。 In foil rolling of aluminum, copper, etc., the upper and lower work rolls may come into contact with the outer side of the material end in the sheet width direction. In such a case, it is difficult to correct the shape deviation with high accuracy with a roll bending machine and a leveling machine system. Therefore, in foil rolling, the shape control by the coolant sprayer is more important than the shape control by the roll bender and the leveler.

由冷卻劑噴灑器所為的形狀控制中，例如當實際形狀比目標形狀還鬆弛(loose)的情形設閥門為導通狀態。閥門為導通狀態期間，會抑制工作輥的熱膨脹，因此改善鬆弛狀態。另一方面，實際形狀比目標形狀還緊密(tight)的情形設閥門為關斷狀態。閥門為關斷狀態期間，會促進工作輥的熱膨脹，因此改善緊密狀態。 In the shape control by the coolant sprinkler, for example, when the actual shape is looser than the target shape, the valve is set to the ON state. While the valve is in the ON state, the thermal expansion of the work rolls is suppressed, thereby improving the slack state. On the other hand, when the actual shape is tighter than the target shape, the valve is set to the closed state. While the valve is in the closed state, thermal expansion of the work rolls is promoted, thereby improving the tightness.

上述的閥門切換亦有時係根據判定形狀偏差是否超過預先設定的閾值來進行。再者，還有依照形狀偏差的大小來設定導通狀態的保持時間，且根據該保持時間來進行上述的閥門切換的方法。在後者的方法中，具體而言係依照形狀偏差的大小來設定保持時間。並且，計算保持時間佔預先設定時間的比例。若根據此種利用時間比例之後者的方法，會宛如進行冷卻劑的流量控制般，進行上述閥門切換。 The above-mentioned valve switching is also sometimes performed based on whether or not the shape deviation exceeds a preset threshold value. Furthermore, there is also a method of setting the holding time of the conductive state according to the magnitude of the shape deviation, and performing the above-described valve switching based on the holding time. In the latter method, the holding time is specifically set according to the size of the shape deviation. Then, the ratio of the holding time to the preset time is calculated. According to the latter method of the utilization time ratio, the above-mentioned valve switching is performed as if the flow rate of the coolant is controlled.

日本特開2005-334910號公報揭示一種技術，係利用藉由形狀偏差與PI控制的組合所計算的位準(LEVEL)，來進行上述的閥門切換。該位準為顯示導通狀態的保持時間佔據預先設定作為形狀控制的控制週期之時間的比例的參數。在該習知技術中，各測量區域的形狀偏差係分別輸入至PI控制器。PI控制器的輸出值係轉換成用以修正目前位準的參數(位準修正量)。 Japanese Patent Laid-Open No. 2005-334910 discloses a technique for performing the above-described valve switching using a level (LEVEL) calculated by a combination of shape deviation and PI control. This level is a parameter showing the ratio of the holding time of the ON state to the time preset as the control cycle of the shape control. In this conventional technique, the shape deviation of each measurement area is separately input to the PI controller. The output value of the PI controller is converted into a parameter (level correction amount) for correcting the current level.

順帶一提，特別在10μm左右之鋁的箔軋延中，會有受上述的閥門切換所致之軋延材的形狀的變化方向會相對於當初預定的方向呈現逆轉的情形。該逆轉現象係不同於時間常數較大之通常的效果，而係在從關斷狀態切換成導通狀態之後就會馬上使鬆弛狀態進展。逆轉現象也包含在從導通狀態切換成關斷狀態之後就會馬上使緊密狀態進展的現象。 Incidentally, especially in the foil rolling of aluminum having a thickness of about 10 μm, the change direction of the shape of the rolled material due to the above-mentioned valve switching may be reversed with respect to the originally intended direction. This reversal phenomenon is different from the usual effect of a large time constant and causes the relaxation state to progress immediately after switching from the off state to the on state. The reversal phenomenon also includes a phenomenon in which the tight state progresses immediately after switching from the ON state to the OFF state.

就用於逆轉現象的對策而言，例示有日本特開2009-274101號公報所揭示的方法。在該習知技術中，係比較：控制閥門為導通狀態時之形狀偏差的程度、與控制閥門為關斷狀態時之形狀偏差的程度。並且，使所有的閥門統一地受到控制，使之成為顯示更小程度的狀態(導通狀態或關斷狀態)。也就是，根據此習知技術，係始終選擇顯示更小程度的閥門狀態。因此，即便逆轉現象發生時，也可抑制形狀不良的進展。 As a countermeasure for reversing the phenomenon, the method disclosed in Japanese Patent Application Laid-Open No. 2009-274101 is exemplified. In this conventional technique, the degree of shape deviation when the control valve is in the on state is compared with the degree of the shape deviation when the control valve is in the off state. Also, all the valves are collectively controlled so as to be in a state (on state or off state) showing a smaller degree. That is, according to this prior art, the valve state is always selected to be displayed to a lesser extent. Therefore, even when the reversal phenomenon occurs, the progression of shape defects can be suppressed.

(先前技術文獻) (prior art literature)

(專利文獻) (patent literature)

專利文獻1：日本特開2005-334910號公報 Patent Document 1: Japanese Patent Laid-Open No. 2005-334910

專利文獻2：日本特開2009-274101號公報 Patent Document 2: Japanese Patent Laid-Open No. 2009-274101

詳細探討在從關斷狀態切換成導通狀態之後馬上發生逆轉現象的情形。該情形中，在切換後就會馬上使鬆弛狀態進展。然而，這樣的情形中，係設想隨著時間的經過工作輥的熱膨脹就會逐漸地收斂，鬆弛狀態也會逐漸地消除。在從導通狀態切換成關斷狀態之後馬上發生逆轉現象的情形中可謂也相同。如此，逆轉現象的發生是暫時性的，且設想隨著時間的經過會回復到當初預定之通常的現象。 The case where the reverse phenomenon occurs immediately after switching from the OFF state to the ON state is discussed in detail. In this case, the relaxed state is advanced immediately after switching. However, in such a case, it is assumed that the thermal expansion of the work rolls will gradually converge with the passage of time, and the slack state will be gradually eliminated. The same can be said for the case where the reverse phenomenon occurs immediately after switching from the ON state to the OFF state. In this way, the occurrence of the reversal phenomenon is temporary, and it is envisaged that with the passage of time, it will return to the original predetermined normal phenomenon.

這樣的話，日本專利公報特開2009-274101號的方法中，即使可暫時性地抑制隨著逆轉現象的發生所致的形狀不良的發生，從長期性的觀點來看仍然有改良的餘地。因為在此習知技術中，所有的閥門統一地受到控制，因此用以抑制板寬方向的一部分的逆轉現象的切換動作，會導致其他部分的形狀偏差的擴大。如此，以犧牲閥門之個別控制作為逆轉現象之對策的習知技術有其極限。 In this way, even if the method of Japanese Patent Application Laid-Open No. 2009-274101 can temporarily suppress the occurrence of shape defects accompanying the occurrence of the reversal phenomenon, there is still room for improvement from a long-term viewpoint. Because in this prior art, all the valves are controlled uniformly, This switching operation for suppressing the reversal phenomenon in a part of the plate width direction causes the shape deviation of other parts to expand. As such, the conventional technique of sacrificing individual control of the valve as a countermeasure against the phenomenon has its limits.

對此，在日本專利公報特開2005-334910號的技術中，係恆常性地進行導通狀態與關斷狀態之間的切換。在此，試想作為逆轉現象的對策，將日本專利公報特開2005-334910號的技術以切換兩種類的控制模式來進行的情形。這是因為軋延設備之致動器的控制會有進行兩種類的控制模式的切換的情形。 On the other hand, in the technique of Japanese Patent Application Laid-Open No. 2005-334910, switching between the ON state and the OFF state is performed constantly. Here, imagine a case where the technique of Japanese Patent Laid-Open No. 2005-334910 is performed by switching two types of control modes as a countermeasure against the reversal phenomenon. This is because the control of the actuator of the rolling equipment may switch between two types of control modes.

就此情形的一般方法而言，可考慮根據軋延材的厚度(板厚)與閾值的大小關係來切換控制模式的方法。然而，日本專利公報特開2005-334910號的技術係使藉由形狀偏差與PI控制的組合所計算的位準再與上述的閥門切換結合。因此，這樣的技術本來就難以設定作為用以切換控制模式的閾值之適當的值。 As a general method in this case, a method of switching the control mode according to the magnitude relationship between the thickness (plate thickness) of the rolled material and the threshold value can be considered. However, the technique of Japanese Patent Laid-Open No. 2005-334910 combines the level calculated by the combination of the shape deviation and the PI control with the above-mentioned valve switching. Therefore, in such a technique, it is inherently difficult to set an appropriate value as a threshold value for switching the control mode.

本發明係有鑑於上述課題所研創者，目的在於提供：即使在逆轉現象發生的情形中，仍可藉由冷卻劑噴灑器之閥門狀態的適當切換來將實際形狀維持在目標形狀的技術。 The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a technique for maintaining the actual shape in the target shape by appropriately switching the valve state of the coolant sprayer even in the event of a reverse phenomenon.

(1)本發明為軋延材的形狀控制系統，且具有下述特徵。 (1) The present invention is a shape control system of a rolled material, and has the following features.

前述形狀控制系統係具備：軋延輥、形狀計、冷卻劑噴灑器、前述冷卻劑噴灑器所具有的複數個閥門、以及形狀控制裝置。 The shape control system includes a rolling roll, a shape meter, a coolant sprayer, a plurality of valves included in the coolant sprayer, and a shape control device.

前述形狀計係設置於前述軋延輥的出口側、並且設置於沿前述軋延輥的體長方向所劃分的複數個區域的每個區域。前述形狀計係依前述複數個區域的每個區域量測軋延材的實際形狀。 The shape gauge is provided on the exit side of the rolling roll, and is provided in each of a plurality of regions divided along the body length direction of the rolling roll. The shape meter measures the actual shape of the rolled product according to each of the plurality of regions.

前述冷卻劑噴灑器，係設置在前述軋延輥的入口側及出口側的至少一方。 The coolant sprayer is provided on at least one of the inlet side and the outlet side of the rolling rolls.

前述複數個閥門，係設置在前述複數個區域的每個區域並在導通狀態與關斷狀態之間切換。 The plurality of valves are disposed in each of the plurality of regions and switch between an on state and an off state.

前述形狀控制裝置，係進行前述軋延材的形狀控制。 The shape control device performs shape control of the rolled material.

前述形狀控制裝置係在前述形狀控制中進行根據位準而個別地控制前述複數個閥門的冷卻劑位準控制， The shape control device performs coolant level control for individually controlling the plurality of valves according to the level in the shape control,

該位準係定有前述導通狀態的保持時間佔據預先設定作為形狀控制的控制週期之時間的比例。 This level is determined by the ratio of the holding time of the aforementioned conductive state to the time set in advance as the control period of the shape control.

前述形狀控制裝置係在前述冷卻劑位準控制中， The aforementioned shape control device is in the aforementioned coolant level control,

根據前述實際形狀、與前述軋延材的目標形狀之偏差，依前述複數個閥門的每個閥門計算前述位準的修正量， According to the deviation between the actual shape and the target shape of the rolled product, the correction amount of the level is calculated for each valve of the plurality of valves,

且根據修正位準來進行前述狀態與前述關斷狀態之間的切換，該修正位準係顯示依據前述修正量之修正後的前述位準。 And the switching between the aforementioned state and the aforementioned shut-off state is performed according to the correction level, which shows the aforementioned level after correction according to the aforementioned correction amount.

前述形狀控制裝置係在前述冷卻劑位準控制中更進行：根據前述軋延材之目標板厚、與依據前述軋延材的種類而設定之板厚閾值的比較，選擇顯示關於前述修正位準之限制的第一限制或第二限制。在此，當前述目標板厚為高於前述板厚閾值的情形時，選擇前述第一限制。當前述目標板厚為前述板厚閾值以下的情形時，選擇前述第二限制。前述第二限制係比前述第一限制更加限制前述修正位準之向下位準的降低。 The shape control device is further performed in the coolant level control: according to the comparison between the target thickness of the rolled material and the thickness threshold set according to the type of the rolled material, select and display information about the correction level. The first limit or the second limit of the limit. Here, when the aforementioned target plate thickness is higher than the aforementioned plate thickness threshold value, the aforementioned first restriction is selected. When the target plate thickness is equal to or less than the plate thickness threshold, the second restriction is selected. The aforesaid second restriction is more restrictive than the aforesaid first restriction to lower the downward level of the aforesaid correction level.

前述形狀控制裝置係在前述冷卻劑位準控制中更進行：使用定有前述軋延材之形狀變化量、與前述導通狀態及關斷狀態之關係的預定之預測模型，依前述複數個區域的每個區域判定逆轉現象是否會在預定預測期間中發生，該逆轉現象為前述軋延材的形狀朝與前述切換所預期之變化的方向相反的方向變化；當具有判定為前述逆轉現象會發生的區域時，判定前述目標板厚是否高於前述板厚閾值；當判定前述目標板厚為高於前述板厚閾值時，在判定為前述逆轉現象會發生的區域中，使用前述目標板厚來更新前述板厚閾值，而在判定為前述逆轉現象不會發生的區域中，不進行前述更新。 The shape control device is further performed in the coolant level control: using a predetermined prediction model that defines the relationship between the shape change amount of the rolled material and the on-state and off-state, according to the plurality of regions. Each area determines whether a reversal phenomenon, which is a change in the shape of the rolled product in the direction opposite to the direction of the change expected by the aforesaid switching, will occur in a predetermined prediction period; When it is determined that the target plate thickness is higher than the above-mentioned plate thickness threshold; when it is determined that the above-mentioned target plate thickness is higher than the above-mentioned plate thickness threshold, in the area where it is determined that the above-mentioned reversal phenomenon will occur, the above-mentioned target plate thickness is used to update The above-mentioned plate thickness threshold value is not updated in a region where it is determined that the above-mentioned reversal phenomenon does not occur.

(2)本發明除了上述特徵之外，還可進一步具有下述特徵。 (2) In addition to the above-mentioned features, the present invention may further have the following features.

前述冷卻劑噴灑器係包含：軋入噴灑器、及工作輥噴灑器；前述形狀控制裝置係在前述冷卻劑位準控制中更進行：根據前述目標板厚、與前述板厚閾值的比較，選擇作為前述冷卻劑位準控制之對象的前述冷卻劑噴灑器；當前述目標板厚高於前述板厚閾值時，選擇前述軋入噴灑器及前述工作輥噴灑器作為前述對象；當前述目標板厚為前述板厚閾值以下時，選擇前述工作輥噴灑器作為前述對象；當前述目標板厚為前述板厚閾值以下時，在前述預定預測期間的整個期間保持前述軋入噴灑器所具有之前述複數個閥門的導通狀態。 The coolant sprinkler system includes: a rolling-in sprinkler and a work roll sprinkler; the shape control device is further performed in the coolant level control: according to the target plate thickness and the comparison with the plate thickness threshold, select The coolant sprayer as the object of the coolant level control; when the target plate thickness is higher than the plate thickness threshold, the rolling-in sprayer and the work roll sprayer are selected as the objects; when the target plate thickness When the target thickness is less than or equal to the thickness threshold, the work roll sprayer is selected as the object; when the target thickness is less than or equal to the thickness threshold, the multiple number of the rolling-in sprinklers is maintained throughout the predetermined prediction period. The conduction state of a valve.

(3)本發明除了上述特徵之外，還可進一步具有下述特徵。 (3) In addition to the above-mentioned features, the present invention may further have the following features.

關於前述修正位準的限制係包含關於前述修正位準之下限值的下限限制；在前述第二限制中的前述下限限制係比前述第一限制中的前述下限限制還高。 The limit on the aforementioned correction level includes a lower limit limit on the lower limit value of the aforementioned correction level; the aforementioned lower limit limit in the aforementioned second limit is higher than the aforementioned lower limit limit in the aforementioned first limit.

(4)本發明除了上述特徵之外，還可進一步具有下述特徵。 (4) In addition to the above-mentioned features, the present invention may further have the following features.

關於前述修正位準的限制係包含：與前述軋延材之板寬方向的前述修正位準之平均值有關的平均限制；在前述第二限制中的前述平均限制係比在前述第一限制中的前述平均限制還高。 The restriction on the aforementioned correction level includes: an average restriction on the average value of the aforementioned correction level in the sheet width direction of the aforementioned rolled product; The aforementioned average limit in the aforementioned second limit is higher than the aforementioned average limit in the aforementioned first limit.

根據本發明，在冷卻劑位準控制中，係根據目標板厚與板厚閾值的比較，來選擇第一限制或第二限制。具體而言，當目標板厚高於板厚閾值的情形時，選擇第一限制。當目標板厚為板厚閾值以下的情形時，選擇第二限制。在此，第二限制與第一限制的不同點在於：第二限制係比第一限制更加限制修正位準之向下位準的降低。 According to the present invention, in the coolant level control, the first limit or the second limit is selected based on the comparison of the target plate thickness with the plate thickness threshold. Specifically, when the target plate thickness is higher than the plate thickness threshold, the first limit is selected. The second limit is selected when the target plate thickness is below the plate thickness threshold. Here, the second restriction is different from the first restriction in that the second restriction restricts the lowering of the downward level of the correction level more than the first restriction.

此外，根據本發明，係使用預測模型且依複數個區域的每個區域判定在預定的預測期間中逆轉現象是否會發生。並且，當具有判定為前述逆轉現象會發生的區域時，根據目標板厚與板厚閾值的比較結果而進行板厚閾值的更新。具體而言，當目標板厚高於板厚閾值時，在判定為前述逆轉現象會發生的區域中，進行使用目標板厚的板厚閾值的更新。 Furthermore, according to the present invention, it is determined whether or not a reversal phenomenon will occur in a predetermined prediction period for each of a plurality of regions using a prediction model. Then, when there is a region in which it is determined that the above-described reversal phenomenon occurs, the plate thickness threshold value is updated based on the result of comparison between the target plate thickness and the plate thickness threshold value. Specifically, when the target plate thickness is higher than the plate thickness threshold value, the plate thickness threshold value using the target plate thickness is updated in the region where it is determined that the above-mentioned reversal phenomenon will occur.

若進行板厚閾值的更新，則至少在下次的控制週期中所進行的目標板厚與板厚閾值的比較中，會獲得目標板厚為板厚閾值以下的判定結果。獲得此判定結果意指選擇第二限制。因此，根據本發明，當預測到逆轉現象會發生時，係在判定為逆轉現象會發生的區域中選擇第二限制，而可抑制因修正位準之大幅度的向下修正所致之該逆轉現象的進展。因此，可將實際形狀維持在目標形狀，並提升產品品質。 When the plate thickness threshold value is updated, at least in the comparison between the target plate thickness and the plate thickness threshold value performed in the next control cycle, a determination result that the target plate thickness is equal to or less than the plate thickness threshold value is obtained. Obtaining this decision result means selecting the second restriction. Therefore, according to the present invention, when the occurrence of the reversal phenomenon is predicted, the second limit is selected in the region where the occurrence of the reversal phenomenon is determined, and the reversal caused by the large downward correction of the correction level can be suppressed. progress of the phenomenon. Therefore, the actual shape can be maintained at the target shape, and product quality can be improved.

10:冷卻劑噴灑器 10: Coolant Sprinkler

11:軋入噴灑器 11: Roll into the sprinkler

12:工作輥噴灑器 12: Work Roll Sprinkler

13:上噴灑器 13: Upper Sprinkler

14:下噴灑器 14: Lower Sprinkler

15:上噴灑器 15: Upper Sprinkler

16:下噴灑器 16: Lower Sprinkler

17:噴嘴 17: Nozzle

20:設定計算裝置 20: Set up the computing device

30:形狀控制裝置 30: Shape Control Device

31:形狀偏差計算功能 31: Shape deviation calculation function

32:預測模型產生功能 32: Predictive model generation function

33:逆轉現象偵測功能 33: Reversal phenomenon detection function

34:參數設定功能 34: Parameter setting function

35:操作量計算功能 35: Operation amount calculation function

40:記憶裝置 40: Memory Device

41:板厚閾值表格 41: Plate Thickness Threshold Table

42:噴灑器選擇表格 42: Sprinkler Selection Form

43:下限限制表格 43: Lower limit table

44:平均限制表格 44: Average Limits Form

50:噴灑器控制裝置 50: Sprinkler Controls

60:形狀計 60: Shape Meter

61:區域 61: Area

70:軋延產線 70: Rolling line

71:軋延材 71: Rolled products

72:軋延機 72: Roller

73:上工作輥 73: Upper work roll

74:下工作輥 74: Lower work roll

100:形狀控制系統 100: Shape Control System

DD:搬運方向 DD: carrying direction

Li:位準 Li: level

RL,LA1,LA2,LB1,LB2,LC1,LC2:下限限制 RL,LA1,LA2,LB1,LB2,LC1,LC2: Lower limit

RM,MA1,MA2,MB1,MB2,MC1,MC2:平均限制 RM,MA1,MA2,MB1,MB2,MC1,MC2: Average limit

SAi:實際形狀 SAi: Actual shape

SDi:形狀偏差 SDi: shape deviation

STi:目標形狀 STi: target shape

Toff,Ton:保持時間 Toff,Ton: hold time

Ts:控制週期 Ts: Control period

Ttgt:目標板厚 Ttgt: target plate thickness

Tth:板厚閾值 Tth: plate thickness threshold

β i:形狀變化量 β i: amount of shape change

圖1係顯示本發明之實施型態的形狀控制系統的構成例之圖。 FIG. 1 is a diagram showing a configuration example of a shape control system according to an embodiment of the present invention.

圖2為應用有圖1所示之冷卻劑噴灑器及形狀計的軋延產線的主要部分的概略圖。 FIG. 2 is a schematic view of a main part of a rolling line to which the coolant sprayer and the shape gauge shown in FIG. 1 are applied.

圖3係顯示板厚閾值表格的一例之圖。 FIG. 3 is a diagram showing an example of a plate thickness threshold table.

圖4係顯示噴灑器選擇表格的一例之圖。 FIG. 4 is a diagram showing an example of a sprinkler selection table.

圖5係顯示下限限制表格的一例之圖。 FIG. 5 is a diagram showing an example of a lower limit limit table.

圖6係顯示平均限制表格的一例之圖。 FIG. 6 is a diagram showing an example of an average limit table.

圖7係說明冷卻劑位準控制的概念之圖。 FIG. 7 is a diagram illustrating the concept of coolant level control.

圖8係說明根據PI控制的位準之修正例之圖。 FIG. 8 is a diagram illustrating an example of correction of the level by PI control.

圖9係顯示測試資料的一例之圖。 FIG. 9 is a diagram showing an example of test data.

圖10係顯示使用預測模型的形狀變化量之預測的實際例之圖。 FIG. 10 is a diagram showing an actual example of the prediction of the shape change amount using the prediction model.

以下，參照圖式說明本發明的實施型態。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1.系統構成的說明 1. Description of the system configuration

圖1係說明本發明之實施型態的形狀控制系統(以下，亦僅稱為「系統」)的構成之圖。如圖1所示，系統100係具備：冷卻劑噴灑器10、設定計算裝置20、形狀控制裝置30、記憶裝置40、噴灑器控制裝置50、以及形狀計60。 FIG. 1 is a diagram illustrating the configuration of a shape control system (hereinafter, also simply referred to as a “system”) according to an embodiment of the present invention. As shown in FIG. 1 , a system 100 includes a coolant sprinkler 10 , a setting calculation device 20 , a shape control device 30 , a memory device 40 , a sprinkler control device 50 , and a shape meter 60 .

參照圖2說明冷卻劑噴灑器10及形狀計60。圖2為應用有冷卻劑噴灑器10及形狀計60之軋延產線的主要部分的概略圖。圖2所示的軋延產線70係藉由單軋台(single stand)型式的軋延機72，來對軋延材71進行軋延(箔軋延)。另外，在圖2中軋延機72為四段式，惟軋延機72的段數並未具體限定，亦可為兩段式或六段式。 The coolant sprinkler 10 and the shape gauge 60 will be described with reference to FIG. 2 . FIG. 2 is a schematic view of a main part of a rolling line to which the coolant sprayer 10 and the shape gauge 60 are applied. In the rolling line 70 shown in FIG. 2 , a rolling mill 72 of a single stand type is used for rolling (foil rolling) of the rolled material 71 . In addition, in FIG. 2, the rolling mill 72 is a four-stage type, but the number of stages of the rolling mill 72 is not specifically limited, and it may be a two-stage type or a six-stage type.

冷卻劑噴灑器10係具備：軋入(roll bite)噴灑器11、及工作輥噴灑器12；前者係設置於軋延機72的入口側，後者係設置於軋延機72的出口側。亦有於軋延機72的入口側設置前者與後者兩方的情況。此處所謂的入口側及出口側，係以軋延材71的搬運方向DD為基準。在以下的說明中，因應需要而區分使用冷卻劑噴灑器10、軋入噴灑器11及工作輥噴灑器12。例如，當沒有特別區分軋入噴灑器11與工作輥噴灑器12之需要時，則採用冷卻劑噴灑器10的總稱。 The coolant sprayer 10 is provided with a roll bite sprayer 11 , which is provided on the inlet side of the rolling mill 72 , and a work roll sprayer 12 , which is provided on the outlet side of the rolling mill 72 . In some cases, both the former and the latter are provided on the entrance side of the rolling mill 72 . The inlet side and the outlet side referred to here are based on the conveyance direction DD of the rolled material 71 . In the following description, the coolant sprayer 10 , the rolling-in sprayer 11 , and the work roll sprayer 12 are used as necessary. For example, when there is no need to specifically distinguish between the rolling-in sprinkler 11 and the work roll sprinkler 12, the general term for the coolant sprinkler 10 is used.

軋入噴灑器11係具備：上噴灑器13、及下噴灑器14。上噴灑器13係朝上工作輥73咬入軋延材71的區域噴射冷卻劑。上噴灑器13係具有複數個噴嘴17。上噴灑器13係還具有依據該等噴嘴17的每個噴嘴而設置的複數個閥門(未圖示)。冷卻劑的噴射係藉由該等的閥門之導通狀態與關斷狀態之間的切換來進行。該閥門的切換係個別地進行。下噴灑器係朝下工作輥74咬入軋延材71的區域噴射冷卻劑。下噴灑器14的構成係與上噴灑器13的構成相同。 The rolling-in sprinkler 11 includes an upper sprinkler 13 and a lower sprinkler 14 . The upper sprayer 13 sprays the coolant toward the area where the upper work rolls 73 bite into the rolled material 71 . The upper sprinkler 13 has a plurality of nozzles 17 . The upper sprinkler 13 also has a plurality of valves (not shown) arranged according to each of the nozzles 17 . The injection of the coolant is performed by switching between the ON state and the OFF state of the valves. The switching of the valve is carried out individually. The lower sprinkler is biting into the downward work roll 74 The area of the rolled material 71 is sprayed with coolant. The structure of the lower sprinkler 14 is the same as that of the upper sprinkler 13 .

與軋入噴灑器11同樣，工作輥噴灑器12亦具備有：上噴灑器15、及下噴灑器16。上噴灑器15係朝上工作輥73噴射冷卻劑。下噴灑器16係朝下工作輥74噴射冷卻劑。上噴灑器15及下噴灑器16的構成係與上噴灑器13的構成相同。也就是，上噴灑器15及下噴灑器16係各自具有複數個閥門。此外，冷卻劑的噴射係藉由該等閥門之導通狀態與關斷狀態之間的切換而進行。 The work roll sprayer 12 is also provided with the upper sprayer 15 and the lower sprayer 16 similarly to the rolling-in sprayer 11 . The upper sprayer 15 sprays the coolant toward the upper work rolls 73 . The lower sprayer 16 sprays the coolant toward the lower work rolls 74 . The configuration of the upper sprinkler 15 and the lower sprinkler 16 is the same as that of the upper sprinkler 13 . That is, the upper sprinkler 15 and the lower sprinkler 16 each have a plurality of valves. In addition, the injection of the coolant is performed by switching between the ON state and the OFF state of the valves.

形狀計60係設置於軋延機72的出口側。形狀計60係具有沿其體長方向劃分的複數個區域61。形狀計60係依該等區域61的每個區域量測軋延材71之板寬方向的荷重而計算張力。以下，將依每個區域61所計算的張力亦稱為「實際形狀SAi」(i係顯示區域編號)。軋延材71的板寬方向的平坦度係以與實際形狀SAi之平均值的偏離來表示。實際形狀SAi愈均一，平坦度就愈小。 The shape gauge 60 is installed on the exit side of the rolling mill 72 . The shape meter 60 has a plurality of regions 61 divided along its body length direction. The shape meter 60 calculates the tension by measuring the load in the width direction of the rolled material 71 in each of the regions 61 . Hereinafter, the tension calculated for each area 61 is also referred to as "actual shape SAi" (i is the display area number). The flatness in the plate width direction of the rolled material 71 is represented by the deviation from the average value of the actual shape SAi. The more uniform the actual shape SAi, the smaller the flatness.

上噴灑器13所具有的複數個噴嘴17(亦即，上噴灑器13所具有之複數個閥門的總數)係對應於複數個區域61的各個區域而設置。通常，每一個區域61設置有一組或兩組的噴嘴17。此對應關係在下噴灑器14所具有的複數個噴嘴17、與複數個區域61之間也成立。再者，此對應關係在上噴灑器15所具有的複數個噴嘴17與複數個區域61之間、以及下噴灑器16所具有的複數個噴嘴17與複數個區域61之間也同樣成立。 The plurality of nozzles 17 of the upper sprinkler 13 (ie, the total number of the plurality of valves of the upper sprinkler 13 ) are provided corresponding to each of the plurality of areas 61 . Typically, each zone 61 is provided with one or two sets of nozzles 17 . This correspondence is also established between the plurality of nozzles 17 and the plurality of regions 61 included in the lower sprinkler 14 . Furthermore, this correspondence is also established between the plurality of nozzles 17 and the plurality of regions 61 included in the upper sprinkler 15 , and between the plurality of nozzles 17 and the plurality of regions 61 included in the lower sprinkler 16 .

返回圖1，繼續系統100的構成說明。設定計算裝置20為電腦，該電腦係至少具有處理器、記憶體、以及輸入輸出介面。設定計算裝置20 係計算軋延產線70的各種設備的設定值。各種設備係包含熱軋延設備、冷軋延設備、箔軋延設備等。 Returning to FIG. 1 , the description of the configuration of the system 100 is continued. It is assumed that the computing device 20 is a computer, and the computer at least has a processor, a memory, and an input-output interface. Setting up the computing device 20 The system calculates the setting values of various equipment of the rolling line 70 . Various types of equipment include hot rolling equipment, cold rolling equipment, foil rolling equipment, and the like.

設定值係包含各種設備之出口側的軋延材71的各種目標值。各種目標值係包含板厚及板寬的目標值。箔軋延設備之出口側的目標值係包含每個區域61的形狀的目標值。以下，將每個區域61的形狀的目標值亦稱為「目標形狀STi」(i係顯示區域編號)。設定計算裝置20係對形狀控制裝置30傳送軋延資訊。軋延資訊係包含與設定值有關的資訊。 The set value includes various target values of the rolled material 71 on the exit side of various equipment. Various target values are target values including plate thickness and plate width. The target value on the exit side of the foil rolling apparatus contains the target value of the shape of each region 61 . Hereinafter, the target value of the shape of each area 61 is also referred to as "target shape STi" (i is a display area number). The setting calculation device 20 transmits the rolling information to the shape control device 30 . Rolling information contains information related to set values.

形狀控制裝置30為電腦，該電腦係至少具有處理器、記憶體、以及輸入輸出介面。形狀控制裝置30係具備：形狀偏差計算功能31、預測模型產生功能32、逆轉現象偵測功能33、參數設定功能34、以及操作量計算功能35。這些功能係藉由處理器執行儲存於記憶體的程式而實現。茲容於「3.形狀控制裝置的功能構成例」中說明該等功能的細節。 The shape control device 30 is a computer having at least a processor, a memory, and an input/output interface. The shape control device 30 includes a shape deviation calculation function 31 , a prediction model generation function 32 , a reverse phenomenon detection function 33 , a parameter setting function 34 , and an operation amount calculation function 35 . These functions are realized by the processor executing programs stored in the memory. The details of these functions are explained in "3. Example of functional configuration of the shape control device".

記憶裝置40係儲存有供應用於「冷卻劑位準控制」的各種表格，該「冷卻劑位準控制」係作為軋延材71的形狀控制而進行。各種表格包含：板厚閾值表格41、噴灑器選擇表格42、下限限制表格43、及平均限制表格44。茲容於「2.冷卻劑位準控制」說明冷卻劑位準控制的細節。以下參照圖3至7說明表格41至44。 The memory device 40 stores various tables supplied for “coolant level control” performed as shape control of the rolled material 71 . The various tables include: Plate Thickness Threshold Table 41 , Sprinkler Selection Table 42 , Lower Limit Limits Table 43 , and Average Limits Table 44 . The details of coolant level control will be explained in "2. Coolant level control". Tables 41 to 44 are described below with reference to FIGS. 3 to 7 .

圖3係顯示板厚閾值表格41的一例之圖。板厚閾值表格41為依軋延材71的材料種類區分定有板厚閾值Tth的表格。板厚閾值Tth係在冷卻劑噴灑器10的參數的設定時，會與軋延材71的目標板厚Ttgt作比較。另外，目標板厚Ttgt係依據軋延材71的材料種類區分所設定的軋延材71的板厚的目標值。該設定係在設定計算裝置20進行。使用板厚閾值Tth之參數的設定係在形狀控制裝置30進行。該等細節茲容於「參數設定功能34」中作說明。 FIG. 3 is a diagram showing an example of the plate thickness threshold value table 41 . The plate thickness threshold value table 41 is a table in which the plate thickness threshold value Tth is determined according to the material type of the rolled material 71 . The plate thickness threshold value Tth is compared with the target plate thickness Ttgt of the rolled material 71 when setting the parameters of the coolant sprinkler 10 . In addition, the target plate thickness Ttgt is a target of the plate thickness of the rolled material 71 set according to the material type of the rolled material 71 value. This setting is performed in the setting calculation device 20 . The setting of the parameters using the plate thickness threshold value Tth is performed in the shape control device 30 . These details are described in "Parameter Setting Function 34".

圖4係顯示噴灑器選擇表格42的一例之圖。噴灑器選擇表格42為定有冷卻劑位準控制之對象的冷卻劑噴灑器10的表格。圖4係顯示用以依據目標板厚Ttgt與板厚閾值Tth之大小關係而選擇冷卻劑噴灑器10的表格。根據該表格，當Ttgt>Tth的情形，選擇軋入噴灑器11及工作輥噴灑器12；當Ttgt≦Tth的情形，僅選擇工作輥噴灑器12。另外，板厚閾值Tth藉由參照板厚閾值表格41來確定。 FIG. 4 is a diagram showing an example of the sprinkler selection table 42 . The sprinkler selection table 42 is a table of the coolant sprinklers 10 to which the coolant level control object is assigned. FIG. 4 is a table showing the selection of the coolant sprinkler 10 according to the magnitude relationship between the target plate thickness Ttgt and the plate thickness threshold value Tth. According to the table, when Ttgt>Tth, the rolling-in sprayer 11 and the work roll sprayer 12 are selected; when Ttgt≦Tth, only the work roll sprayer 12 is selected. In addition, the plate thickness threshold value Tth is determined by referring to the plate thickness threshold value table 41 .

圖5係顯示下限限制表格43的一例之圖。下限限制表格43係定有「下限限制RL」的表格，該「下限限制RL」係作為關於冷卻劑位準控制的位準Li(i係顯示區域編號)之下限值的限制。圖5係顯示用以依據材料種類區分、與目標板厚Ttgt和板厚閾值Tth之間之大小關係的組合來切換下限限制RL的表格。根據該表格，例如，當材料種類區分AA、並且Ttgt>Tth的情形，選擇下限限制LA1；當材料種類區分AA、並且Ttgt≦Tth的情形，選擇下限限制LA2(>LA1)。 FIG. 5 is a diagram showing an example of the lower limit restriction table 43 . The lower limit limit table 43 is a table in which "lower limit limit RL" is defined as a limit on the lower limit value of the level Li (i is the display area number) of the coolant level control. FIG. 5 is a table showing a table for switching the lower limit RL according to the combination of the material type and the magnitude relationship between the target thickness Ttgt and the thickness threshold Tth. According to this table, for example, when the material type is AA and Ttgt>Tth, select the lower limit LA1; when the material type is AA, and Ttgt≦Tth, select the lower limit LA2 (>LA1).

下限限制LA1與LA2之間的大小關係亦適用於下限限制LB1與LB2之間，甚至也適用於下限限制LC1與LC2之間。此處，如後述，位準Li愈上升，位準Li的保持時間Ton相對地會愈長。換句話說，位準Li愈降低，關斷狀態的保持時間Toff相對地會愈長。因此，通常而言，若位準Li下降，會使鬆弛狀態(指實際形狀SAi等於或小於目標形狀STi的狀態。以下亦同)進展。 The magnitude relationship between the lower limits LA1 and LA2 also applies between the lower limits LB1 and LB2, and even between the lower limits LC1 and LC2. Here, as will be described later, as the level Li rises, the holding time Ton of the level Li becomes relatively longer. In other words, the lower the level Li is, the longer the off-state retention time Toff is relatively. Therefore, in general, when the level Li is lowered, a relaxed state (a state in which the actual shape SAi is equal to or smaller than the target shape STi. The same applies hereinafter) progresses.

圖6係顯示平均限制表格44的一例之圖。平均限制表格44係定有「平均限制RM」的表格，該「平均限制RM」係作為與軋延材71的板寬方向的位準Li之平均值有關之限制。圖6係顯示用以依據材料種類區分、與目標板厚Ttgt和板厚閾值Tth之間的大小關係的組合來切換平均限制RM的表格。根據該表格，例如，當材料種類區分AA、並且Ttgt>Tth的情形，選擇平均限制MA1；當材料種類區分AA、並且Ttgt≦Tth的情形，選擇平均限制MA2(>MA1)。 FIG. 6 is a diagram showing an example of the average limit table 44 . The average limit table 44 is a table in which the "average limit RM" is defined as a limit related to the average value of the level Li in the sheet width direction of the rolled material 71 . FIG. 6 is a table showing a table for switching the average limit RM according to the combination of the material type distinction and the magnitude relationship between the target plate thickness Ttgt and the plate thickness threshold value Tth. According to this table, for example, when the material type is AA and Ttgt>Tth, the average limit MA1 is selected; when the material type is AA and Ttgt≦Tth, the average limit MA2 (>MA1) is selected.

平均限制MA1與MA2之間的大小關係亦適用於平均限制MB1與MB2之間，甚至亦適用於平均限制MC1與MC2之間。 The magnitude relationship between the average limits MA1 and MA2 also applies between the average limits MB1 and MB2, and even between the average limits MC1 and MC2.

在圖5及圖6所示之例中，下限限制RL及平均限制RM係依據目標板厚Ttgt與板厚閾值Tth之間的大小關係而在兩種類的限制之間切換。在本說明書中，將Ttgt>Tth之情形的下限限制RL及平均限制RM總稱為「第一限制」。此外，將Ttgt≦Tth之情形的下限限制RL及平均限制RM總稱為「第二限制」。第一限制與第二限制的不同之點在於：第二限制的選擇中比第一限制的選擇中，更加限制位準Li之向下位準的修正。 In the example shown in FIGS. 5 and 6 , the lower limit limit RL and the average limit RM are switched between the two types of limits according to the magnitude relationship between the target plate thickness Ttgt and the plate thickness threshold value Tth. In this specification, the lower limit limit RL and the average limit RM in the case of Ttgt>Tth are collectively referred to as "first limit". In addition, the lower limit limit RL and the average limit RM in the case of Ttgt≦Tth are collectively referred to as “second limit”. The difference between the first restriction and the second restriction is that the selection of the second restriction restricts the correction of the downward level of the level Li more than the selection of the first restriction.

返回圖1，繼續系統100之構成的說明。噴灑器控制裝置50係從形狀控制裝置30接受關於將閥門保持為導通狀態的時間(亦即保持時間Ton)、及將閥門保持為關斷狀態的時間(亦即保持時間Toff)的資訊。保持時間Ton及Toff係依據位準Li而按每個噴嘴17所計算。因此，噴灑器控制裝置50係根據保持時間Ton及Toff而個別地控制閥門。 Returning to FIG. 1 , the description of the structure of the system 100 is continued. The sprinkler control device 50 receives information from the shape control device 30 about the time during which the valve is kept in the ON state (ie, the hold time Ton) and the time during which the valve is kept in the OFF state (ie, the hold time Toff). The holding times Ton and Toff are calculated for each nozzle 17 according to the level Li. Therefore, the sprinkler control device 50 individually controls the valves according to the hold times Ton and Toff.

2.冷卻劑位準控制 2. Coolant level control

在此，一面參照圖7及8，一面說明冷卻劑位準控制。冷卻劑位準控制係使用位準Li來設定保持時間Ton及Toff，且根據該保持時間Ton及Toff而個別地控制閥門者。位準Li係藉由形狀偏差SDi(i係顯示區域編號)與PI控制(比例‧積分控制)的組合所計算。形狀偏差SDi為實際形狀SAi與目標形狀STi的偏差(SDi=STi-SAi)。 Here, the coolant level control will be described with reference to FIGS. 7 and 8 . The coolant level control uses the level Li to set the holding times Ton and Toff, and controls the valves individually according to the holding times Ton and Toff. The level Li is calculated by the combination of the shape deviation SDi (i is the display area number) and the PI control (proportional-integral control). The shape deviation SDi is the deviation between the actual shape SAi and the target shape STi (SDi=STi-SAi).

圖7係說明冷卻劑位準控制的概念之圖。冷卻劑位準控制係以預定的控制週期Ts反覆執行。△t為將控制週期Ts均等地分割時的一片段。位準Li係設有位準0到10之總計11位準，來作為保持時間Ton佔據控制週期Ts的比例。在圖7所示之例中，控制週期Ts設為10等分。位準Li為位準5的情形，保持時間Ton為△t×5，而位準7的情形保持時間Ton為△t×7。在任一情形中，保持時間Toff為△t×(10-Li)。如此，位準Li愈上升，位準Li的保持時間Ton會愈長。 FIG. 7 is a diagram illustrating the concept of coolant level control. The coolant level control is repeatedly performed at a predetermined control period Ts. Δt is a segment when the control period Ts is equally divided. The level Li is provided with a total of 11 levels from levels 0 to 10, as the ratio of the holding time Ton to the control period Ts. In the example shown in FIG. 7, the control period Ts is set to be divided into 10 equal parts. The holding time Ton is Δt×5 when the level Li is the case of the level 5, and the holding time Ton is Δt×7 in the case of the level 7. In either case, the holding time Toff is Δt×(10-Li). In this way, the higher the level Li is, the longer the holding time Ton of the level Li will be.

圖8係說明根據PI控制的位準Li的修正例。圖8的橫軸為PI控制的控制輸出，縱軸為位準修正量。在圖8所示之例中，控制輸出為正時，位準修正量會朝正方向階段狀地增加。亦即，控制輸出為正的情形，會朝延長保持時間Ton的方向修正位準Li。相對地，當輸出控制為負時，會朝縮短保持時間Ton的方向修正位準Li。 FIG. 8 illustrates an example of correction of the level Li by PI control. The horizontal axis of FIG. 8 is the control output of the PI control, and the vertical axis is the level correction amount. In the example shown in FIG. 8, when the control output is positive, the level correction amount increases stepwise in the positive direction. That is, when the control output is positive, the level Li is corrected in the direction of increasing the holding time Ton. Conversely, when the output control is negative, the level Li is corrected in the direction of shortening the holding time Ton.

3.形狀控制裝置的功能構成例 3. Example of functional configuration of the shape control device

3-1.形狀偏差計算功能 3-1. Shape deviation calculation function

形狀偏差計算功能31係從形狀計60取得實際形狀SAi。形狀偏差計算功能31還從設定計算裝置20取得目標形狀STi。並且，形狀偏差計算功能31係計算形狀偏差SDi(SDi=STi-SAi)。形狀偏差SDi的資訊會傳送給操作量計算功能35。 The shape deviation calculation function 31 acquires the actual shape SAi from the shape meter 60 . The shape deviation calculation function 31 also acquires the target shape STi from the setting calculation device 20 . In addition, the shape deviation calculation function 31 is Calculate the shape deviation SDi (SDi=STi-SAi). The information of the shape deviation SDi is sent to the operation amount calculation function 35 .

預測模型產生功能32係產生預測模型，該預測模型係用以預測這次的控制週期Ts的未來一週期(下次的控制週期Ts)中的軋延材71的形狀變化量β i(i係顯示區域編號)。預測模型產生功能32首先計算過去的實際形狀SAi的平均值Asai。平均值Asai係使用在固定周期內所收集到的實際形狀SAi的過去數值(具體而言，為前一次的數值到I次前的數值)所計算。形狀變化量β i係以從實際形狀SAi的這次數值減去平均值Asai的方式計算。形狀變化量β i係每當收集實際形狀SAi就反覆計算。 The prediction model generation function 32 generates a prediction model for predicting the shape change amount β i of the rolled material 71 in the next cycle (the next control cycle Ts) of the current control cycle Ts (i is displayed as area number). The prediction model generation function 32 first calculates the average value Asai of the actual shapes SAi in the past. The average value Asai is calculated using the past values (specifically, the previous value to the previous value) of the actual shape SAi collected in a fixed period. The shape change amount β i is calculated by subtracting the average value Asai from the current value of the actual shape SAi. The shape change amount β i is calculated repeatedly every time the actual shape SAi is collected.

各閥門的導通狀態與關斷狀態係轉換為(ON,OFF)=(1,0)的信號。預測模型產生功能32係記憶K組的資料，其中係以形狀變化量β i的這次數值、與從形狀變化量β i的前一次計算直到J次計算前為止之間的冷卻劑噴灑器10的閥門的導通及關斷信號的紀錄作為一組的資料。該信號的紀錄為第i號的區域61者。並且，預測模型產生功能32係藉由以K組資料作為訓練資料的下述式(1)，來計算軋入噴灑器11的影響係數w^Bite、及工作輥噴灑器12的影響係數w^WR，且產生預測模型。 The on-state and off-state of each valve are converted into a signal of (ON,OFF)=(1,0). The prediction model generation function 32 memorizes the data of the K groups, which are the values of the shape change amount β i this time and the coolant sprinkler 10 between the previous calculation of the shape change amount β i and before the J times of calculation. The records of the valve's on and off signals are used as a group of data. The record of this signal is the ith area 61. In addition, the prediction model generation function 32 calculates the influence coefficient w ^Bite of the rolling-in sprinkler 11 and the influence coefficient w ^WR of the work roll sprinkler 12 by using the following formula (1) with K sets of data as training data, and generate a predictive model.

式(1)所使用的變數如下。 The variables used in the formula (1) are as follows.

j：過去的資料編號[-] j: past data number [-]

J：過去的資料數量[-] J: Number of past data[-]

k：資料組的編號[-] k: the number of the data set [-]

K：資料組的數量[-] K: number of datasets [-]

β：形狀變化量[I-unit] β: Shape change amount [I-unit]

v_kj ^WR：工作輥噴灑器12的閥門的導通及關斷信號[-] v _kj ^WR : ON and OFF signal of the valve of the work roll sprayer 12 [-]

v_kj ^Bite：軋入噴灑器11的閥門的導通及關斷信號[-] v _kj ^Bite : On and off signal of the valve rolled into sprinkler 11 [-]

w_j ^WR：工作輥冷卻劑噴灑器的影響係數[I-unit] w _j ^WR : Influence coefficient of work roll coolant sprayer [I-unit]

w_j ^Bite：咬入冷卻劑噴灑器的影響係數[I-unit] w _j ^Bite : Influence coefficient of bite coolant sprinkler [I-unit]

λ：係數[-] λ: coefficient [-]

α：配分比[-] α: distribution ratio [-]

3-2.預測模型產生功能 3-2. Prediction model generation function

預測模型產生功能32係以具有各J個冷卻劑噴灑器10的閥門之導通及關斷信號為一組的方式預備n組。並且，以該n組的資料作為測試資料，一組一組地輸入至預測模型。藉此，預測未來1到n次(也就是未來1到n週期)的形狀變化量β i。預測模型產生功能32係將預測期間(也就是，1到n週期之間)中的形狀變化量β i傳送至逆轉現象偵測功能33。 The prediction model generation function 32 prepares n sets of ON and OFF signals of the valves of each J coolant sprinkler 10 as a set. Then, the n sets of data are used as test data, and are input into the prediction model group by group. Thereby, the shape change amount β i of 1 to n times in the future (that is, 1 to n cycles in the future) is predicted. The prediction model generation function 32 transmits the shape change amount β i in the prediction period (ie, between 1 and n cycles) to the reversal phenomenon detection function 33 .

圖9係顯示測試資料的一例之圖。圖9所示之例中，過去的資料數量J=20，且縱方向排列n組冷卻劑噴灑器10的閥門之導通及關斷信號。資料編號j=20的資料，係顯示形狀變化量β i之前次計算時的導通及關斷信號。n=1的資料組係用以預測未來一次的形狀變化量β i者。如上述的測試資料係一組一組地輸入至預測模型，藉此可預測當工作輥噴灑器12的閥門從關斷狀態切換成導通狀態時之未來一到十六週期的形狀變化量β i。 FIG. 9 is a diagram showing an example of test data. In the example shown in FIG. 9 , the number of past data is J=20, and the ON and OFF signals of the valves of n groups of coolant sprinklers 10 are arranged in the longitudinal direction. The data of data number j=20 shows the ON and OFF signals of the previous calculation of the shape change amount β i. The data set with n=1 is used to predict the shape change β i in the future. The test data as described above are input into the prediction model group by group, whereby the shape change amount β i of one to sixteen cycles in the future when the valve of the work roll sprinkler 12 is switched from the OFF state to the ON state can be predicted. .

圖10係顯示使用預測模型之形狀變化量β i的預測實例。該預測係關注於總計具有二十一個區域的四段軋延機的第十四號的區域(亦即，i=14)而進行。測試資料係使用圖9所說明的十六組的資料。軋延材為鋁箔，且其目標板厚Ttgt為12.4μm及34μm。圖10的縱軸為形狀變化量β i，縱軸正方向相當於緊密狀態、而縱軸負方向相當於鬆弛狀態。圖10的橫軸係藉由資料組數量的轉換所獲得的時間。 FIG. 10 shows an example of prediction of the shape change amount β i using the prediction model. The prediction is performed focusing on the fourteenth zone (ie, i=14) of the four-stage rolling mill having a total of twenty-one zones. The test data used the sixteen sets of data illustrated in FIG. 9 . The rolled material was aluminum foil, and its target plate thickness Ttgt was 12.4 μm and 34 μm. The vertical axis of FIG. 10 is the shape change amount β i, the positive direction of the vertical axis corresponds to the tight state, and the negative direction of the vertical axis corresponds to the relaxed state. The horizontal axis of FIG. 10 is the time obtained by converting the number of data sets.

從Ttgt=34μm的預測結果可理解，在通常的軋延下，當將工作輥噴灑器切換成導通狀態時，會抑制工作輥及軋延材的熱膨脹，使軋延材的形狀成為緊密狀態。然而，從Ttgt=12.4μm的預測結果可理解，即使工作輥噴灑器切換成導通狀態也會成為鬆弛狀態。此為逆轉現象。當逆轉現象發生時，形狀變化量β i會以兩秒左右的短時間變化為鬆弛狀態。 From the prediction result of Ttgt = 34 μm, it is understood that in normal rolling, when the work roll sprayer is switched to the ON state, the thermal expansion of the work roll and the rolled material is suppressed, and the shape of the rolled material becomes a tight state. However, it can be understood from the predicted result of Ttgt=12.4 μm that even if the work roll sprinkler is switched to the ON state, it will be in the slack state. This is a reversal phenomenon. When the reversal phenomenon occurs, the shape change amount β i changes to a relaxed state in a short time of about two seconds.

在本實施型態中，用於訓練的資料組數K設定為較大的數值。資料組數K設定為較大數值，藉此相對地降低使用於形狀控制的其他制動器(軋輥彎曲機、水平調整機等)的對於逆轉現象的影響程度。因此，根據本實施型態，藉由使閥門的切換與形狀變化量β i的關係性明確化的預測模型，提高了逆轉現象之發生的預測準確度。 In this embodiment, the number K of data sets used for training is set to a large value. The number K of data sets is set to a large value, thereby relatively reducing the degree of influence of other brakes (roll benders, levelers, etc.) used for shape control on the reversal phenomenon. Therefore, according to the present embodiment, the prediction accuracy of the occurrence of the reversal phenomenon is improved by the prediction model that clarifies the relationship between the valve switching and the shape change amount β i.

3-3.逆轉現象偵測功能 3-3. Reversal phenomenon detection function

返回圖1，繼續說明形狀控制裝置30的功能構成例。逆轉現象偵測功能33係根據從預測模型產生功能32接收的形狀變化量β i，來判定在1到n週期之間是否會發生逆轉現象。例如，計算自未來n週期的形狀變化量β i減去未來一週期的形狀變化量β i後的△β i值。並且，當△β i值等於或小於預先設定的閾值β th時，逆轉現象偵測功能33係判定逆轉現象會發生。 Returning to FIG. 1 , the description of the functional configuration example of the shape control device 30 will be continued. The reversal phenomenon detection function 33 determines whether a reversal phenomenon occurs between 1 and n cycles according to the shape change amount β i received from the prediction model generation function 32 . For example, the value of Δβ i obtained by subtracting the shape change amount β i for one period in the future from the shape change amount β i for the next n cycles is calculated. And, when the value of Δβ i is equal to or smaller than the preset threshold value β th, the reverse phenomenon detection function 33 determines that the reverse phenomenon will occur.

在另一例中，使未來1到n週期的形狀變化量β i近似為一次函數。並且，當該一次函數的一次係數γ等於或小於預先設定的閾值γ th時，逆轉現象偵測功能33係判定逆轉現象會發生。 In another example, the shape change amount β i for the next 1 to n cycles is approximated as a linear function. And, when the linear coefficient γ of the linear function is equal to or smaller than a preset threshold value γ th, the reverse phenomenon detection function 33 determines that the reverse phenomenon occurs.

當判定為逆轉現象發生時，逆轉現象偵測功能33係從設定計算裝置20取得目前正被軋延的軋延材71的材料種類區分及目標板厚Ttgt的資料。而且，逆轉現象偵測功能33係參照板厚閾值表格41(參照圖3)，確定與所取得的材料種類區分相對應的板厚閾值Tth。並且，逆轉現象偵測功能33係將該板厚閾值Tth、與經取得的目標板厚Ttgt做比較。當Ttgt>Tth時，逆轉現象偵測功能33係使用目標板厚Ttgt來更新板厚閾值Tth。當Ttgt≦Tth時，不進行該更新。 When it is determined that the reversal phenomenon has occurred, the reversal phenomenon detection function 33 acquires the data of the material type classification of the rolled material 71 currently being rolled and the target plate thickness Ttgt from the setting calculation device 20 . Then, the reversal phenomenon detection function 33 refers to the plate thickness threshold value table 41 (see FIG. 3 ), and determines the plate thickness threshold value Tth corresponding to the acquired material type classification. In addition, the reversal phenomenon detection function 33 compares the thickness threshold Tth with the acquired target thickness Ttgt. When Ttgt>Tth, the reversal phenomenon detection function 33 uses the target thickness Ttgt to update the thickness threshold Tth. When Ttgt≦Tth, this update is not performed.

3-4.參數設定功能 3-4. Parameter setting function

參數設定功能34係從設定計算裝置20取得目前正被軋延的軋延材71的材料種類區分及目標板厚Ttgt的資料。而且，參數設定功能34係參照板厚閾值表格41，確定與所取得的材料種類區分相對應的板厚閾值Tth。到目前為止的功能，係與逆轉現象偵測功能33的一部分共通。參數設定功能34係進一步參照：噴灑器選擇表格42(參照圖4)、下限限制表格43(參照圖5)、及平均限制表格44(參照圖6)。並且，從各表格選擇與板厚閾值Tth和目標板厚Ttgt的比較結果相對應的參數，且傳送給操作量計算功能35。 The parameter setting function 34 acquires the data of the material type classification of the rolled material 71 currently being rolled and the target plate thickness Ttgt from the setting calculation device 20 . Then, the parameter setting function 34 refers to the plate thickness threshold value table 41 and determines the plate thickness threshold value Tth corresponding to the acquired material type classification. The functions so far are common to a part of the reversal phenomenon detection function 33 . The parameter setting function 34 is further referred to: the sprinkler selection table 42 (see FIG. 4 ), the lower limit limit table 43 (see FIG. 5 ), and the average limit table 44 (see FIG. 6 ). Then, a parameter corresponding to the comparison result between the plate thickness threshold value Tth and the target plate thickness Ttgt is selected from each table, and sent to the operation amount calculation function 35 .

3-5.操作量計算功能 3-5. Operation amount calculation function

操作量計算功能35係將形狀偏差SDi輸入至PI控制器，且計算位準修正量(參照圖8)。並且，操作量計算功能35係使用該位準修正量，修正目前的位準Li。在修正位準Li時，係適當參照從參數設定功能34接收到的參數(具體而言為下限限制RL)。並且，當修正後的位準Li^MOD與下限限制RL抵觸時，操作量計算功能35係進一步修正該位準Li^MOD使之與下限限制RL一致。 The operation amount calculation function 35 inputs the shape deviation SDi to the PI controller, and calculates the level correction amount (see FIG. 8 ). Then, the operation amount calculation function 35 uses the level correction amount to correct the current level Li. When correcting the level Li, the parameter (specifically, the lower limit limit RL) received from the parameter setting function 34 is appropriately referred to. Furthermore, when the corrected level Li ^MOD contradicts the lower limit limit RL, the operation amount calculation function 35 further corrects the level Li ^MOD to match the lower limit limit RL.

操作量計算功能35還使用從參數設定功能34接收到的參數(具體而言為平均限制RM)，對修正後的位準Li^MOD進一步修正。該修正係例如使用下述式(2)及(3)進行。 The operation amount calculation function 35 further corrects the corrected level Li ^MOD using the parameter (specifically, the average limit RM) received from the parameter setting function 34 . This correction is performed using the following formulas (2) and (3), for example.

於式(2)及(3)所使用的變數如下。 The variables used in formulas (2) and (3) are as follows.

△L_comp：位準修正量[-] △L _comp : Level correction amount [-]

L_AVE ^SET：平均限制RM[-] L _AVE ^SET : Average limit RM[-]

n_S：覆蓋在形狀計60板上的區域61之最初的區域編號[-] n _S : the first area number [-] of the area 61 covered on the shape meter 60 board

n_E：覆蓋在形狀計60板上的區域61之最後的區域編號[-] n _E : The last area number [-] of the area 61 covered on the shape meter 60 board

Li：冷卻劑位準控制的位準[-] Li: Level of coolant level control [-]

Li^NEW：修正後的位準[-] Li ^NEW : Corrected level [-]

操作量計算功能35係根據修正後的位準Li^NEW、與控制週期Ts，來計算保持時間Ton及Toff。並且，操作量計算功能35係將保持時間Ton及Toff傳送至噴灑器控制裝置50。 The operation amount calculation function 35 calculates the holding times Ton and Toff based on the corrected level Li ^NEW and the control period Ts. Then, the operation amount calculation function 35 transmits the holding times Ton and Toff to the sprinkler control device 50 .

操作量計算功能35還使用從參數設定功能34接收到的參數(具體而言為冷卻劑位準控制的對象噴灑器)，Ttgt≦Tth的情形，係設定軋入噴灑器11的閥門狀態。此設定的理由係因為當Ttgt≦Tth的情形，僅選擇工作輥噴灑器12作為冷卻劑位準控制的對象噴灑器。該情形，操作量計算功能35係對噴灑器控制裝置50傳送使軋入噴灑器11所具有的所有閥門在預測期間(亦即，1至n週期之間)保持為導通狀態的指令。 The operation amount calculation function 35 also uses the parameter received from the parameter setting function 34 (specifically, the target sprinkler for coolant level control), and when Ttgt≦Tth, the valve state of the rolling-in sprinkler 11 is set. The reason for this setting is that when Ttgt≦Tth, only the work roll spray is selected. The sprinkler 12 is the target sprinkler for coolant level control. In this case, the operation amount calculation function 35 transmits an instruction to the sprinkler control device 50 to keep all the valves of the rolling-in sprinkler 11 in the ON state for the predicted period (ie, between 1 and n cycles).

逆轉現象的發生機制的細節不詳。但是，本發明者咸推測因為冷卻劑噴灑器10之閥門的導通狀態與關斷狀態之間的切換而使軋入內的摩擦係數局部性地變化乙事，至少對逆轉現象的發生有所影響。因此，在本實施型態中，當Ttgt≦Tth的情形，係使軋入噴灑器11所具有的所有的閥門保持為導通狀態。藉由將所有的閥門保持為導通狀態，而期待抑制上述的局部性的變化。另外，關於冷卻劑位準控制係藉由工作輥噴灑器12的閥門來執行，故此冷卻劑位準控制的執行本身會持續。 The details of the mechanism by which the reversal phenomenon occurs are unknown. However, the present inventors speculate that the local change of the friction coefficient in the rolling-in due to the switching between the ON state and the OFF state of the valve of the coolant sprinkler 10 affects at least the occurrence of the reversal phenomenon. . Therefore, in the present embodiment, when Ttgt≦Tth, all the valves included in the rolling-in sprinkler 11 are kept in the conductive state. By keeping all the valves in the ON state, it is expected to suppress the above-mentioned local changes. In addition, the coolant level control is performed by the valve of the work roll sprinkler 12, so the execution of the coolant level control itself continues.

4.功效 4. Efficacy

根據以上說明的實施型態的系統，係執行冷卻劑位準控制。在冷卻劑位準控制中，係依據目標板厚Ttgt與板厚閾值Tth的比較結果，來選擇第一限制或第二限制。具體而言，當Ttgt>Tth的情形選擇第一限制，而當Ttgt≦Tth的情形選擇第二限制。 According to the system of the embodiment described above, the coolant level control is performed. In the coolant level control, the first limit or the second limit is selected according to the comparison result of the target plate thickness Ttgt and the plate thickness threshold value Tth. Specifically, the first limit is selected when Ttgt>Tth, and the second limit is selected when Ttgt≦Tth.

此外，根據實施型態的系統，係藉由使用預測模型來判定將來是否會發生逆轉現象。並且，當判定為逆轉現象會發生時，係根據目標板厚Ttgt與板厚閾值Tth的比較結果，來執行板厚閾值Tth的更新。具體而言，當目標板厚Ttgt高於板厚閾值Tth時，在判定為逆轉現象會發生的區域中，執行使用目標板厚Ttgt的板厚閾值Tth的更新。 In addition, according to the system of the embodiment, it is determined whether or not a reversal phenomenon will occur in the future by using a prediction model. Then, when it is determined that the reversal phenomenon will occur, the update of the plate thickness threshold value Tth is performed based on the comparison result of the target plate thickness Ttgt and the plate thickness threshold value Tth. Specifically, when the target plate thickness Ttgt is higher than the plate thickness threshold value Tth, the update of the plate thickness threshold value Tth using the target plate thickness Ttgt is performed in the region where the reversal phenomenon is determined to occur.

若執行板厚閾值Tth的更新，則至少在下次的控制週期Ts中所執行之目標板厚Ttgt與板厚閾值Tth的比較中，會獲得顯示Ttgt≦Tth的判定結果。獲得顯示Ttgt≦Tth的判定結果意指選擇第二限制。由以上所述，根據實施型態的系統，當預測逆轉現象會發生時，可在下次的控制週期Ts中選擇第二限制。若選擇第二限制，會相較於選擇第一限制的情形，可抑制因位準Li的大幅度的向下修正所導致之逆轉現象的進展。據此，可將實際形狀SAi維持在目標形狀STi，以提升產品品質。 If the plate thickness threshold value Tth is updated, at least in the comparison between the target plate thickness Ttgt and the plate thickness threshold value Tth executed in the next control period Ts, a judgment result showing Ttgt≦Tth is obtained. fruit. Obtaining a determination result showing Ttgt≦Tth means selecting the second restriction. From the above, according to the system of the embodiment, when the occurrence of the reversal phenomenon is predicted, the second limit can be selected in the next control period Ts. If the second limit is selected, the progress of the reversal phenomenon caused by the large downward correction of the level Li can be suppressed compared with the case where the first limit is selected. Accordingly, the actual shape SAi can be maintained at the target shape STi to improve product quality.

此外，根據實施型態的系統，當獲得顯示Ttgt≦Tth的判定結果時，可使軋入噴灑器11所具有之所有的閥門保持為導通狀態。也就是，根據實施型態的系統，當預測到逆轉現象會發生時，在下次的控制週期Ts中進行板厚閾值Tth的更新俾以獲得顯示Ttgt≦Tth的判定結果，且可根據該判定結果使所有的閥門保持為導通狀態。如上述方式，將所有的閥門保持為導通狀態，藉此可期待抑制上述之局部性的變化。藉此，在逆轉現象發生時，可有效地抑制該逆轉現象的進展。 Further, according to the system of the embodiment, when a determination result showing Ttgt≦Tth is obtained, all the valves included in the rolling-in sprinkler 11 can be kept in the ON state. That is, according to the system of the embodiment, when the occurrence of the reversal phenomenon is predicted, the plate thickness threshold value Tth is updated in the next control period Ts so as to obtain a determination result showing Ttgt≦Tth, and the determination result can be based on the Leave all valves open. By keeping all the valves in the ON state as described above, it can be expected to suppress the above-mentioned local changes. Thereby, when the reversal phenomenon occurs, the progress of the reversal phenomenon can be effectively suppressed.

5.實施型態的變形例 5. Variation of the implementation form

上述實施型態，可為以下說明之各種的變形。 The above-described embodiment can be modified in various ways as described below.

在上述實施型態中，係使用在軋延材71的軋延中所收集到的訓練資料來產生預測模型，且根據將測試資料應用在該預測模型所獲得的形狀變化量β i進行逆轉現象的判定。也就是，在軋延材71的軋延中即時(real time)地產生預測模型，且在對於該軋延材71的形狀控制中進行逆轉現象的判定。但是，亦可事先產生以逆轉現象發生時的資料作為教師資料的分類器(預測模型)，且使用該分類器來進行逆轉現象的判定。例如，由調整者判斷在軋延材71的軋延中所收集到的形狀變化量β i的資料，是否為逆轉現象發生時的資料。並且，以逆轉現象發生時的資料作為教師資料而預先訓練分類器。將在上述實施型態所使用的n組的資料輸入至前述分類器，就可進行逆轉現象的判定。 In the above-described embodiment, the prediction model is generated using the training data collected during rolling of the rolled material 71, and the reversal phenomenon is performed based on the shape change amount βi obtained by applying the test data to the prediction model judgment. That is, a prediction model is generated in real time during rolling of the rolled material 71 , and determination of the reversal phenomenon is performed in the shape control of the rolled material 71 . However, it is also possible to generate a classifier (prediction model) using the data at the time of occurrence of the reversal phenomenon as teacher data in advance, and to use the classifier to determine the reversal phenomenon. For example, the adjuster judges whether the data of the shape change amount β i collected during rolling of the rolled material 71 is the data when the reversal phenomenon occurs. In addition, the classifier is pre-trained with the data when the reversal phenomenon occurs as the teacher data. will be on The n sets of data used in the above-described embodiment are input into the aforementioned classifier, and the reversal phenomenon can be determined.

在上述實施型態中，係藉由在式(1)所表示之稱為Elastic Net(彈性網路)的迴歸分析手法來產生預測模型。但是，亦可與Elastic Net同樣地使用利用縮小推定器的Ridge回歸(脊迴歸)或Lasso回歸(套索迴歸)來產生預測模型，或亦可使用類神經網路(neural network)或隨機森林法(Random Forest)等之其他的迴歸分析手法。 In the above-mentioned embodiment, the prediction model is generated by the regression analysis method called Elastic Net represented by the formula (1). However, similar to Elastic Net, Ridge regression (ridge regression) or Lasso regression (Lasso regression) using a narrowing estimator may be used to generate a prediction model, or a neural network or random forest method may be used. (Random Forest) and other regression analysis techniques.

在上述實施型態中，係根據形狀偏差SDi與PI控制的組合來修正位準Li。但是，亦可使用P控制(比例控制)或PID控制(比例、積分、微分控制)來取代PI控制而進行此修正。 In the above-mentioned embodiment, the level Li is corrected according to the combination of the shape deviation SDi and the PI control. However, P control (proportional control) or PID control (proportional, integral, derivative control) may be used instead of PI control to perform this correction.

10:冷卻劑噴灑器 10: Coolant Sprinkler

11:軋入噴灑器 11: Roll into the sprinkler

12:工作輥噴灑器 12: Work Roll Sprinkler

20:設定計算裝置 20: Set up the computing device

30:形狀控制裝置 30: Shape Control Device

31:形狀偏差計算功能 31: Shape deviation calculation function

32:預測模型產生功能 32: Predictive model generation function

33:逆轉現象偵測功能 33: Reversal phenomenon detection function

34:參數設定功能 34: Parameter setting function

35:操作量計算功能 35: Operation amount calculation function

40:記憶裝置 40: Memory Device

41:板厚閾值表格 41: Plate Thickness Threshold Table

42:噴灑器選擇表格 42: Sprinkler Selection Form

43:下限限制表格 43: Lower limit table

44:平均限制表格 44: Average Limits Form

50:噴灑器控制裝置 50: Sprinkler Controls

60:形狀計 60: Shape Meter

100:形狀控制系統 100: Shape Control System

Claims

一種軋延材的形狀控制系統，係具備： A shape control system for rolled products, comprising:

軋延輥； Roller;

形狀計，係設置在前述軋延輥的出口側、並且設置在沿前述軋延輥的體長方向所劃分的複數個區域的每個區域，且依前述複數個區域的每個區域量測軋延材的實際形狀； A shape meter is installed on the exit side of the rolling roll and in each of a plurality of regions divided along the body length direction of the rolling roll, and the rolling is measured for each of the plurality of regions the actual shape of the extension;

冷卻劑噴灑器，係設置在前述軋延輥的入口側及出口側的至少一方； a coolant sprayer provided on at least one of the inlet side and the outlet side of the rolling rolls;

複數個閥門，係前述冷卻劑噴灑器所具有的複數個閥門，且係設置在前述複數個區域的每個區域並在導通狀態與關斷狀態之間切換；以及 a plurality of valves, which are the plurality of valves of the coolant sprinkler, and are provided in each of the plurality of regions and are switched between an on state and an off state; and

形狀控制裝置，係進行前述軋延材的形狀控制； A shape control device for performing shape control of the rolled material;

前述形狀控制裝置係在前述形狀控制中， The aforementioned shape control device is in the aforementioned shape control,

進行根據位準而個別地控制前述複數個閥門的冷卻劑位準控制，該位準係定有前述導通狀態的保持時間佔據預先設定作為前述形狀控制的控制週期之時間的比例； performing coolant level control for individually controlling the plurality of valves according to a level determined by the ratio of the holding time of the conduction state to the time preset as the control period of the shape control;

且根據修正位準來進行前述導通狀態與前述關斷狀態之間的切換，該修正位準係顯示依據前述修正量之修正後的前述位準； and performing the switching between the on-state and the off-state according to a correction level, the correction level showing the corrected level according to the correction amount;

前述形狀控制裝置係在前述冷卻劑位準控制中更進行： The aforementioned shape control device is further performed in the aforementioned coolant level control:

根據前述軋延材之目標板厚、與依據前述軋延材的種類而設定之板厚閾值的比較，選擇顯示關於前述修正位準之限制的第一限制或第二限制； According to the comparison between the target thickness of the rolled product and the thickness threshold set according to the type of the rolled product, select and display the first limit or the second limit on the limit of the correction level;

當前述目標板厚為高於前述板厚閾值的情形時，選擇前述第一限制； When the aforementioned target plate thickness is higher than the aforementioned plate thickness threshold, select the aforementioned first limit;

當前述目標板厚為前述板厚閾值以下的情形時，選擇前述第二限制； When the aforementioned target plate thickness is below the aforementioned plate thickness threshold, the aforementioned second restriction is selected;

前述第二限制係比前述第一限制更加限制前述修正位準之向下位準的降低； The aforementioned second restriction is more restrictive than the aforementioned first restriction to lower the downward level of the aforementioned correction level;

使用定有前述軋延材之形狀變化量、與前述導通狀態及關斷狀態之關係的預定之預測模型，依前述複數個區域的每個區域判定逆轉現象是否會在預定預測期間中發生，該逆轉現象為前述軋延材的形狀朝與前述切換所預期之變化的方向相反的方向變化； Using a predetermined prediction model that defines the relationship between the shape change of the rolled material and the on-state and off-state, it is determined whether or not a reversal phenomenon will occur in a predetermined prediction period for each of the plurality of regions. The reversal phenomenon is that the shape of the aforementioned rolled product changes in the direction opposite to the direction of the change expected by the aforementioned switching;

當具有判定為前述逆轉現象會發生的區域時，判定前述目標板厚是否高於前述板厚閾值； When there is an area where it is determined that the aforementioned reversal phenomenon will occur, determine whether the aforementioned target plate thickness is higher than the aforementioned plate thickness threshold;

當判定前述目標板厚為高於前述板厚閾值時，在判定為前述逆轉現象會發生的區域中，使用前述目標板厚來更新前述板厚閾值，而在判定為前述逆轉現象不會發生的區域中，不進行前述更新。 When it is determined that the target plate thickness is higher than the plate thickness threshold value, the plate thickness threshold is updated using the target plate thickness in the region where it is determined that the inversion phenomenon will occur, and the plate thickness threshold value is updated in the region determined that the inversion phenomenon will not occur. In the area, the aforementioned update is not performed.

如請求項1所述之軋延材的形狀控制系統，其中，前述冷卻劑噴灑器係包含：軋入噴灑器、及工作輥噴灑器； The shape control system for rolled products according to claim 1, wherein the coolant sprayer comprises: a roll-in sprayer and a work roll sprayer;

根據前述目標板厚、與前述板厚閾值的比較，選擇作為前述冷卻劑位準控制之對象的前述冷卻劑噴灑器； According to the comparison between the target plate thickness and the plate thickness threshold, the coolant sprayer to be the object of the coolant level control is selected;

當前述目標板厚高於前述板厚閾值時，選擇前述軋入噴灑器及前述工作輥噴灑器作為前述對象； When the aforementioned target plate thickness is higher than the aforementioned plate thickness threshold, the aforementioned rolling-in sprayer and the aforementioned work roll sprayer are selected as the aforementioned objects;

當前述目標板厚為前述板厚閾值以下時，選擇前述工作輥噴灑器作為前述對象； When the aforementioned target plate thickness is below the aforementioned plate thickness threshold, the aforementioned work roll sprayer is selected as the aforementioned object;

當前述目標板厚為前述板厚閾值以下時，在前述預定預測期間的整個期間保持前述軋入噴灑器所具有之前述複數個閥門的導通狀態。 When the target plate thickness is equal to or less than the plate thickness threshold value, the conducting state of the plurality of valves included in the rolling-in sprinkler is maintained throughout the predetermined prediction period.

如請求項1或2所述之軋延材的形狀控制系統，其中，關於前述修正位準的限制係包含關於前述修正位準之下限值的下限限制； The shape control system of a rolled product according to claim 1 or 2, wherein the limitation on the correction level includes a lower limit limitation on the lower limit value of the correction level;

在前述第二限制中的前述下限限制係比前述第一限制中的前述下限限制還高。 The aforementioned lower limit limit in the aforementioned second limit is higher than the aforementioned lower limit limit in the aforementioned first limit.

如請求項1或2所述之軋延材的形狀控制系統，其中，關於前述修正位準的限制係包含：與前述軋延材之板寬方向的前述修正位準之平均值有關的平均限制； The shape control system for a rolled material according to claim 1 or 2, wherein the restriction on the correction level includes an average restriction on the average value of the correction level in the width direction of the rolled material ;

在前述第二限制中的前述平均限制係比在前述第一限制中的前述平均限制還高。 The aforementioned average limit in the aforementioned second limit is higher than the aforementioned average limit in the aforementioned first limit.