TW202140161A - Shape control method for rolling machine and shape control device - Google Patents

Shape control method for rolling machine and shape control device Download PDF

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Publication number
TW202140161A
TW202140161A TW110108046A TW110108046A TW202140161A TW 202140161 A TW202140161 A TW 202140161A TW 110108046 A TW110108046 A TW 110108046A TW 110108046 A TW110108046 A TW 110108046A TW 202140161 A TW202140161 A TW 202140161A
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shape
control
width
steel plate
steel sheet
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TW110108046A
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Chinese (zh)
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TWI769727B (en
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鈴木健治
原田悦充
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日商杰富意鋼鐵股份有限公司
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B21B13/142—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls by axially shifting the rolls, e.g. rolls with tapered ends or with a curved contour for continuously-variable crown CVC
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2263/00—Shape of product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2263/00—Shape of product
    • B21B2263/02—Profile, e.g. of plate, hot strip, sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/18—Roll crown; roll profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2269/00—Roll bending or shifting
    • B21B2269/02—Roll bending; vertical bending of rolls
    • B21B2269/06—Intermediate roll bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2269/00—Roll bending or shifting
    • B21B2269/12—Axial shifting the rolls
    • B21B2269/16—Intermediate rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/40—Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/42—Control of flatness or profile during rolling of strip, sheets or plates using a combination of roll bending and axial shifting of the rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Ceramic Capacitors (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

A shape control method for a rolling machine according to the present invention includes: a measurement step for measuring a shape of a steel plate on an output side of a rolling machine; and a control step for controlling the rolling machine in such a manner that the shape of the steel plate falls within an allowable range on the basis of the shape of the steel plate measured in the measurement step. The control step includes a step for, in the case where a width of the steel plate to be rolled exceeds a predetermined value, setting a control gain to be smaller than a control gain in the case where the width of the steel plate to be rolled is equal to or less than the predetermined value.

Description

壓延機的形狀控制方法及形狀控制裝置Shape control method and shape control device of calender

本發明是有關於一種壓延機的形狀控制方法及形狀控制裝置。The invention relates to a shape control method and a shape control device of a calender.

於連續式冷軋機等壓延機中，採用了以下方法：測定壓延結束後的鋼板的形狀，並將測定結果回饋至壓延機而將鋼板的形狀控制於允許範圍內。另外，除此之外，亦採用了以下方法：於各壓延機座設置板厚計、或板厚計及板速度計，於各壓延機座實施輥間隙控制或輥速度控制（參照專利文獻1）。 [現有技術文獻] [專利文獻]In rolling mills such as continuous cold rolling mills, the following method is adopted: the shape of the steel sheet after rolling is measured, and the measurement result is fed back to the rolling mill to control the shape of the steel sheet within the allowable range. In addition, in addition to this, the following method is also adopted: each calender is equipped with a thickness gauge, or a thickness gauge and a speed gauge, and each calender is controlled by roll gap or roll speed (refer to Patent Document 1 ). [Prior Art Literature] [Patent Literature]

專利文獻1：日本專利特開2012-110939號公報Patent Document 1: Japanese Patent Laid-Open No. 2012-110939

[發明所欲解決之課題] 然而，所述方法是用於將鋼板的板厚限制於允許範圍內的控制，因此具有抑制板厚不良的發生的效果，但無法抑制鋼板斷裂的發生。特別是若成為板寬為1200 mm以上的寬幅的鋼板，則存在容易發生起因於形狀不良的鋼板的斷裂的問題。[The problem to be solved by the invention] However, the method described above is a control for limiting the thickness of the steel sheet within the allowable range, and therefore has the effect of suppressing the occurrence of sheet thickness defects, but cannot suppress the occurrence of steel sheet fracture. In particular, if it is a wide steel plate with a plate width of 1200 mm or more, there is a problem that the steel plate is likely to break due to a poor shape.

本發明是鑒於所述課題而成，其目的在於提供一種於不增大設備改造等的成本的情況下，即便為板寬較寬的鋼板亦能夠抑制斷裂的發生的壓延機的形狀控制方法及形狀控制裝置。The present invention was made in view of the above-mentioned problems, and its object is to provide a method for controlling the shape of a rolling mill that can suppress the occurrence of cracks even for a steel plate with a wide plate width without increasing the cost of equipment modification or the like. Shape control device.

[解決課題之手段] 本發明的壓延機的形狀控制方法包括：測定步驟，測定壓延機的出側處的鋼板的形狀；以及控制步驟，基於所述測定步驟中所測定的鋼板的形狀來對壓延機進行控制，以使鋼板的形狀處於允許範圍內，所述控制步驟包括以下步驟：於作為壓延對象的鋼板的寬度超過規定值的情況下，將控制增益設定得較作為壓延對象的鋼板的寬度為規定值以下時的控制增益小。[Means to solve the problem] The shape control method of the rolling machine of the present invention includes: a measuring step of measuring the shape of the steel sheet at the exit side of the rolling machine; and a control step of controlling the rolling machine based on the shape of the steel sheet measured in the measuring step to To make the shape of the steel sheet within the allowable range, the control step includes the following steps: when the width of the steel sheet to be rolled exceeds a predetermined value, the control gain is set to be less than the specified value than the width of the steel sheet to be rolled The control gain is small.

本發明的壓延機的形狀控制裝置包括：測定部件，測定壓延機的出側處的鋼板的形狀；以及控制部件，基於由所述測定部件測定的鋼板的形狀來對壓延機進行控制，以使鋼板的形狀處於允許範圍內，所述控制部件包括以下步驟：於作為壓延對象的鋼板的寬度超過規定值的情況下，將控制增益設定得較作為壓延對象的鋼板的寬度為規定值以下時的控制增益小。The shape control device of the calender of the present invention includes: a measuring unit that measures the shape of the steel sheet at the exit side of the calender; and a control unit that controls the calender based on the shape of the steel sheet measured by the measuring unit so that The shape of the steel sheet is within the allowable range, and the control means includes the following steps: when the width of the steel sheet to be rolled exceeds a predetermined value, the control gain is set to be smaller than the width of the steel sheet to be rolled The control gain is small.

[發明的效果] 根據本發明的壓延機的形狀控制方法及形狀控制裝置，於不增大設備改造等的成本的情況下，即便為板寬較寬的鋼板亦可抑制斷裂的發生。[Effects of the invention] According to the shape control method and the shape control device of the calender of the present invention, the occurrence of fracture can be suppressed even if it is a steel plate with a wide plate width without increasing the cost of equipment modification or the like.

〔概念〕 首先，參照圖1的（a）、（b）對本發明的壓延機的形狀控制方法及形狀控制裝置的概念進行說明。〔concept〕 First, the concept of the shape control method and shape control device of the calender of the present invention will be described with reference to Fig. 1 (a) and (b).

圖1的（a）、（b）分別是表示板寬為1200 mm以下及超過1200 mm時的鋼板的目標形狀及實際形狀的圖。如圖1的（a）所示，於板寬為1200 mm以下的情況下，於實際形狀中，鋼板的寬度方向的邊緣部及中央部呈伸長形狀，邊緣部與中央部之間的中間位置（四分之一位置）呈拉伸形狀，從而均成為與目標形狀相同的傾向。於此種鋼板的形狀分佈中，由於邊緣部呈伸長形狀，因此鋼板不易斷裂。Fig. 1 (a) and (b) are diagrams showing the target shape and actual shape of the steel sheet when the sheet width is 1200 mm or less and exceeds 1200 mm, respectively. As shown in Figure 1(a), when the plate width is 1200 mm or less, in the actual shape, the edge and center of the steel plate in the width direction are elongated, and the middle position between the edge and the center is (A quarter position) is in a stretched shape, and thus all have the same tendency as the target shape. In the shape distribution of this kind of steel sheet, since the edge portion is elongated, the steel sheet is not easily broken.

與此相對，如圖1的（b）所示，於板寬超過1200 mm的情況下，於實際形狀中，存在板寬方向上的伸長形狀與拉伸形狀的分佈未必與目標形狀一致的部分（形狀不均），其區域亦寬。於此情況下，有用於調整部分地產生形狀不均的區域的形狀的壓延機的致動器成為過控制的可能性。而且，由於成為過控制而與產生了形狀不均的位置不同的部位的形狀走樣，藉此邊緣部附近的形狀更向拉伸方向變化等而鋼板容易斷裂。In contrast, as shown in Figure 1(b), when the board width exceeds 1200 mm, in the actual shape, there is a portion where the distribution of the elongated shape and the stretched shape in the board width direction does not necessarily match the target shape (Uneven shape), and its area is also wide. In this case, there is a possibility that the actuator of the calender for adjusting the shape of the region where the shape unevenness is partially generated may be over-controlled. In addition, due to the over-control, the shape of the part different from the position where the shape unevenness occurs is out of shape, whereby the shape near the edge portion changes further in the stretching direction, etc., and the steel sheet is likely to break.

先前，無論鋼板的板寬如何，致動器的控制增益均設為一定值。此處，所謂控制增益，表示對形狀進行控制的致動器的動作量。於檢測出的形狀相對於作為目標的形狀的偏差成為規定值以上的情況下，為了對形狀進行控制，致動器進行運作，但將其動作量的程度定義為控制增益。然而，於鋼板的板寬例如超過1200 mm等而大於規定的板寬的情況下，若使用相同的控制增益值，則成為過控制，形狀走樣增長，因此有發生鋼板的斷裂的可能性。因此，於本發明中，將容易發生鋼板的形狀走樣的鋼板的板寬預先確定為規定的板寬。而且，於作為壓延對象的鋼板的板寬超過規定的板寬的情況下，使對鋼板的形狀進行控制的致動器的控制增益較作為壓延對象的鋼板的板寬為規定的板寬以下時的控制增益小。具體而言，於圖1的（a）、（b）所示的例子中，於對板寬超過1200 mm的鋼板進行壓延時，使控制增益較板寬為1200 mm以下時的控制增益小。藉此，可於不增大設備改造等的成本的情況下抑制鋼板隨著鋼板的形狀走樣而斷裂，從而穩定地對鋼板進行壓延。Previously, regardless of the plate width of the steel plate, the control gain of the actuator was set to a certain value. Here, the control gain means the amount of operation of the actuator that controls the shape. When the deviation of the detected shape from the target shape becomes a predetermined value or more, in order to control the shape, the actuator operates, but the degree of its operation is defined as the control gain. However, when the width of the steel plate exceeds a predetermined width of, for example, 1200 mm or the like, if the same control gain value is used, the control will be over-controlled and the shape distortion will increase. Therefore, the steel plate may break. Therefore, in the present invention, the plate width of the steel plate where the shape of the steel plate is likely to be distorted is determined in advance as a predetermined plate width. Furthermore, when the sheet width of the steel sheet to be rolled exceeds the predetermined sheet width, when the control gain of the actuator that controls the shape of the steel sheet is less than the predetermined sheet width than the sheet width of the steel sheet to be rolled The control gain is small. Specifically, in the examples shown in (a) and (b) of FIG. 1, when a steel plate with a plate width exceeding 1200 mm is rolled, the control gain is made smaller than the control gain when the plate width is 1200 mm or less. Thereby, the steel plate can be suppressed from breaking due to the shape of the steel plate without increasing the cost of equipment modification and the like, and the steel plate can be rolled stably.

〔實施例〕 接著，參照圖2及圖3對本發明的壓延機的形狀控制方法及形狀控制裝置的實施例進行說明。[Example] Next, an embodiment of the shape control method and shape control device of the calender of the present invention will be described with reference to FIGS. 2 and 3.

於本實施例中，作為一例，於圖2所示的連續式冷軋機1中，使用最終壓延機座出側處的鋼板的寬度方向的形狀測定結果進行了鋼板的形狀控制。再者，圖2所示的連續式冷軋機1是藉由壓延機座3a～壓延機座3e對自卷軸2a送出的鋼板S進行壓延之後藉由卷軸2b捲取的壓延機。另外，於作為最終壓延機座的壓延機座3e的出側設置有測定鋼板S的寬度方向的形狀的形狀計10。而且，控制裝置11基於由形狀計10測量的鋼板S的寬度方向的形狀，對設置於各壓延機座的致動器（帶錐形的第一中間輥的移位控制或折彎機控制）進行控制，藉此將鋼板S的寬度方向的形狀控制於允許範圍內。In this embodiment, as an example, in the continuous cold rolling mill 1 shown in FIG. 2, the shape control of the steel sheet is performed using the shape measurement result of the steel sheet at the exit side of the final rolling stand. In addition, the continuous cold rolling mill 1 shown in FIG. 2 is a rolling mill which rolls the steel plate S sent out from the reel 2a by the rolling stand 3a-the rolling stand 3e, and then rolls it with the reel 2b. Moreover, the shape meter 10 which measures the shape of the width direction of the steel plate S is provided in the exit side of the rolling stand 3e which is a final rolling stand. Furthermore, the control device 11 controls the actuators (displacement control of the tapered first intermediate roll or bending machine control) provided in each rolling stand based on the shape of the steel sheet S in the width direction measured by the shape meter 10 Control is performed to control the shape of the steel plate S in the width direction within the allowable range.

另外，於本實施例中，鋼板S的板厚設為0.1 mm～3.5 mm，壓延速度設為30 rpm～2000 rpm。另外，鋼板S的板寬設為600 mm～1300 mm的範圍內。另外，變更控制增益的鋼板S的板寬設為根據過去的操作實績成為形狀走樣引起的斷裂發生率變高的邊界的1200 mm。而且，對圖3所示的通板數（線圈數）分別進行與板寬為1200 mm以下相同的控制增益下的壓延（現有例：通常增益）、相對於板寬為1200 mm以下的控制增益而言為1/2的控制增益下的壓延（本發明例1：增益值1/2）、及相對於板寬為1200 mm以下的控制增益而言為1/4的控制增益下的壓延（本發明例2：增益值1/4）。其結果，如圖3所示，現有例的斷裂率為3.9%左右，與此相對，本發明例的斷裂率為0%。藉此確認，根據本發明，可於不增大設備改造等的成本的情況下抑制鋼板斷裂的發生而穩定地進行壓延。In addition, in this embodiment, the thickness of the steel plate S is set to 0.1 mm to 3.5 mm, and the rolling speed is set to 30 rpm to 2000 rpm. In addition, the width of the steel plate S is set to be in the range of 600 mm to 1300 mm. In addition, the width of the steel sheet S for which the control gain is changed is set to 1200 mm, which is the boundary at which the rate of occurrence of fracture due to shape distortion increases based on the past operation results. In addition, the number of through plates (number of coils) shown in Fig. 3 is rolled under the same control gain as the plate width of 1200 mm or less (conventional example: normal gain), and the control gain relative to the plate width of 1200 mm or less For example, the rolling under the control gain of 1/2 (invention example 1: gain value 1/2), and the rolling under the control gain of 1/4 relative to the control gain of 1200 mm or less ( Example 2 of the present invention: gain value 1/4). As a result, as shown in FIG. 3, the fracture rate of the conventional example was about 3.9%, while the fracture rate of the present example was 0%. This confirms that, according to the present invention, it is possible to suppress the occurrence of steel sheet breakage and to perform rolling stably without increasing the cost of equipment modification or the like.

以上，對應用了由本發明者等人進行的發明的實施方式進行了說明，但本發明並不受形成基於本實施方式的本發明的揭示的一部分的描述及圖式限定。例如，亦可應用於森吉米爾軋機（Sendzimir mill）等單機座的壓延機。即，基於本實施方式並由本領域技術人員等進行的其他實施方式、實施例及運用技術等全部包含於本發明的範疇內。As mentioned above, the embodiment to which the invention made by the inventors of the present invention is applied has been described, but the present invention is not limited by the description and drawings that form a part of the disclosure of the present invention based on the present embodiment. For example, it can also be applied to a single-stand calender such as Sendzimir mill. In other words, other embodiments, examples, and operating techniques based on this embodiment and performed by those skilled in the art are all included in the scope of the present invention.

[產業上的可利用性] 根據本發明，可提供一種於不增大設備改造等的成本的情況下，即便為板寬較寬的鋼板亦能夠抑制斷裂的發生的壓延機的形狀控制方法及形狀控制裝置。[Industrial availability] According to the present invention, it is possible to provide a shape control method and a shape control device for a rolling mill that can suppress the occurrence of cracks even with a wide steel plate without increasing the cost of equipment modification or the like.

1:連續式冷軋機 2a、2b:卷軸 3a～3e:壓延機座 10:形狀計 11:控制裝置 S:鋼板1: Continuous cold rolling mill 2a, 2b: reels 3a～3e: Calender base 10: Shape meter 11: Control device S: Steel plate

圖1的（a）、（b）是表示板寬為1200 mm以下及超過1200 mm時的鋼板的目標形狀及實際形狀的圖。 圖2是表示實施例中的連續式冷軋機的結構的示意圖。 圖3是表示現有例及本發明例的斷裂率的圖。(A) and (b) of FIG. 1 are diagrams showing the target shape and actual shape of the steel sheet when the sheet width is 1200 mm or less and exceeds 1200 mm. Fig. 2 is a schematic diagram showing the structure of a continuous cold rolling mill in an embodiment. Fig. 3 is a graph showing the fracture rate of a conventional example and an example of the present invention.

Claims (2)

一種壓延機的形狀控制方法，包括： 測定步驟，測定壓延機的出側處的鋼板的形狀；以及 控制步驟，基於所述測定步驟中所測定的鋼板的形狀來對壓延機進行控制，以使鋼板的形狀處於允許範圍內， 所述控制步驟包括以下步驟：於作為壓延對象的鋼板的寬度超過規定值的情況下，將控制增益設定得較作為壓延對象的鋼板的寬度為規定值以下時的控制增益小。A shape control method of a calender includes: The measuring step, measuring the shape of the steel plate at the exit side of the calender; and The control step controls the rolling machine based on the shape of the steel sheet measured in the measurement step so that the shape of the steel sheet is within the allowable range, The control step includes the step of setting the control gain to be smaller than the control gain when the width of the steel sheet to be rolled is less than the specified value when the width of the steel sheet to be rolled exceeds a predetermined value. 一種壓延機的形狀控制裝置，包括： 測定部件，測定壓延機的出側處的鋼板的形狀；以及 控制部件，基於由所述測定部件測定的鋼板的形狀來對壓延機進行控制，以使鋼板的形狀處於允許範圍內， 於作為壓延對象的鋼板的寬度超過規定值的情況下，所述控制部件將控制增益設定得較作為壓延對象的鋼板的寬度為規定值以下時的控制增益小。A shape control device of a calender includes: Measure parts, measure the shape of the steel plate at the exit side of the calender; and The control part controls the rolling machine based on the shape of the steel plate measured by the measuring part so that the shape of the steel plate is within the allowable range, When the width of the steel sheet to be rolled exceeds a predetermined value, the control means sets the control gain to be smaller than the control gain when the width of the steel sheet to be rolled is equal to or less than the predetermined value.
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