TWI401123B - Rolling method for sheet metal - Google Patents
Rolling method for sheet metal Download PDFInfo
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- TWI401123B TWI401123B TW100102284A TW100102284A TWI401123B TW I401123 B TWI401123 B TW I401123B TW 100102284 A TW100102284 A TW 100102284A TW 100102284 A TW100102284 A TW 100102284A TW I401123 B TWI401123 B TW I401123B
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- rolling
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- bending force
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending
Description
本發明係有關於金屬板材之輥軋機，乃一種可賦予高響應度且強力之輥彎曲力之輥軋機。特別是有關於一種即使以遞減彎曲裝置之響應度低於遞增彎曲裝置之響應度之多段輥軋機，亦可賦予高響應之軋板冠高‧形狀控制機能之金屬板材之輥軋方法。The present invention relates to a rolling mill for sheet metal, which is a rolling mill capable of imparting high resilience and strong roll bending force. In particular, it relates to a multi-stage rolling mill in which the resilience of the decreasing bending device is lower than that of the incremental bending device, and it is also possible to impart a high-response rolling method for the crown height of the rolled plate and the shape control function.
於4段輥軋機或6段輥軋機等多段輥軋機進行軋板冠高‧形狀控制輥軋時之控制方法，有於工作輥軸承座賦予彎曲力之輥彎曲(roll bending)、使輥於輥軸向上位移之輥橫移(roll shift)、於輥配有交叉角之輥交叉(roll cross)等。The control method for rolling the crown height and shape control rolling in a multi-stage rolling mill such as a 4-stage rolling mill or a 6-stage rolling mill, the roll bending which gives the bending force to the work roll chock, and the roll is rolled A roll shift in the axial direction, a roll cross with a cross angle on the roll, and the like.
該等控制方法中，輥橫移或輥交叉均難以於輥軋中迅速變更設定。因此，不適於要求在輥軋中進行控制之軋板冠高‧形狀控制輥軋。相對於此，輥彎曲裝置可控制油壓，並可於輥軋中變更輥彎曲力，故適於軋板冠高‧形狀控制輥軋。In these control methods, it is difficult to rapidly change the setting during roll traverse or roll crossover. Therefore, it is not suitable for the crown height and shape control rolling of the rolled sheet which is required to be controlled in the rolling. On the other hand, the roll bending device can control the oil pressure and can change the roll bending force during rolling, so it is suitable for rolling plate crown height and shape control rolling.
專利文獻1中記載一種利用具有輥彎曲機構與輥橫移機構之熱精軋機，對由板寬、板厚、鋼種等各異之鋼材接合而成之輥軋材連續輥軋之方法。但，相較於輥彎曲力之變更速度，輥橫移位置之變更速度非常緩慢，因此於輥軋中固定輥橫移位置後，僅以響應度高之輥彎曲力進行冠高控制。Patent Document 1 describes a method of continuously rolling a rolled material obtained by joining steel materials having different widths, thicknesses, and steel grades by a hot finish rolling mill having a roll bending mechanism and a roll traverse mechanism. However, the change speed of the roll traverse position is very slow compared to the change speed of the roll bending force. Therefore, after the fixed roll traverse position in the roll, the crown height control is performed only by the roll bending force with high responsiveness.
此時，軋板冠高‧形狀控制係藉由輥彎曲裝置之控制速度決定速度，而輥彎曲裝置具有高響應度是一直以來的期望。At this time, the rolling plate crown height ‧ shape control system determines the speed by the control speed of the roll bending device, and the high bending degree of the roll bending device is a long-standing expectation.
專利文獻2中記載，輥彎曲裝置之響應度係由伺服閥之二次配管長度決定(請參照專利文獻2之段落[0014]、第1圖)。因此，乃藉由用以控制遞增側與遞減側之油壓差之伺服閥控制彎曲力。為確保高響應度，故將該等伺服閥配置於輥軋機機架之驅動側與操作側之各入料側及出料側共計4處之機架立柱側面，並將各伺服閥至油壓缸之配管長度設為2m以內。Patent Document 2 describes that the responsiveness of the roll bending device is determined by the length of the secondary pipe of the servo valve (refer to paragraph [0014] and Fig. 1 of Patent Document 2). Therefore, the bending force is controlled by a servo valve for controlling the oil pressure difference between the increasing side and the decreasing side. In order to ensure high responsiveness, the servo valves are disposed on the side of the rack column at the four sides of the driving side and the discharging side of the rolling mill frame, and the servo valves are hydraulically pressed. The length of the piping of the cylinder is set to be within 2 m.
專利文獻1日本專利公開公報特開平第6-55207號Patent Document 1 Japanese Patent Laid-Open Publication No. Hei 6-55207
專利文獻2日本專利公開公報特開平第8-215730號Patent Document 2 Japanese Patent Laid-Open Publication No. 8-215730
然而，輥彎曲裝置之響應度並非僅由伺服閥至油壓缸之配管長度決定。However, the responsiveness of the roll bending device is not determined solely by the length of the pipe from the servo valve to the hydraulic cylinder.
舉例言之，第1圖所示之輥軋機，係具有上下一對工作輥1-1、1-2與用以分別支持其等之上下一對支撐輥2-1、2--2之4段輥軋機。該輥軋機係呈遞增彎曲裝置6-1～6-4裝入突出塊5-1、5-2，且遞減彎曲裝置7-1～7-4裝入上下支撐輥軸承座4-1、4-2之形式。該形式之輥軋機，遞減彎曲裝置之響應速度低於遞增彎曲裝置之響應速度。For example, the rolling mill shown in Fig. 1 has a pair of upper and lower work rolls 1-1, 1-2 and 4 for supporting the upper and lower pair of support rolls 2-1, 2--2, respectively. Segment roll mill. The rolling mill is loaded with the protruding blocks 5-1 to 5-4 in the incremental bending devices 6-1 to 6-4, and the decreasing bending devices 7-1 to 7-4 are loaded into the upper and lower support roller bearing blocks 4-1, 4 Form of -2. In this type of rolling mill, the response speed of the decreasing bending device is lower than the response speed of the incremental bending device.
因此，為控制軋板冠高‧形狀而使工作輥產生遞增彎曲力作用時，可進行高響應控制，但產生遞減彎曲力作用時，無法於輥軋中迅速變更設定。因而無法去除輥軋材料入料側板厚或輥軋材料溫度等輥軋中會變動之干擾因素，以致有製品品質或良品率降低之情形。Therefore, in order to control the crown height of the rolled plate and to cause the work roll to generate an increasing bending force, high response control can be performed, but when the rolling force is reduced, the setting cannot be quickly changed during the rolling. Therefore, it is impossible to remove the disturbance factor which may vary in the rolling of the side material thickness of the rolling material or the temperature of the rolling material, so that the product quality or the yield rate is lowered.
又，遞減彎曲裝置之響應度之所以未變高，或為無法使用固定配管之故。即，工作輥因輥軋運轉而比支撐輥容易耗損，故須定期換輥。但第1圖所示之輥軋機，係將遞增彎曲裝置裝入突出塊，故於換輥作業時無須拆裝遞增彎曲裝置之油壓配管，並可藉由固定配管連接油壓控制閥。因此可採用用以進行高響應油壓控制之伺服閥。相對於此，第1圖之輥軋機之遞減彎曲裝置因裝入上下支撐輥軸承座，故每次換輥作業時必須拆裝遞減彎曲裝置之油壓配管。油壓配管拆裝時油壓配管內混入微小異物之可能性提高，因此無法採用用以進行高響應油壓控制之伺服閥。又，因必須藉由撓性配管等呈柔性構造且拆裝自如之油壓配管連接油壓控制閥，以致應傳達之油壓變動經吸收而衰減。Moreover, the responsiveness of the decreasing bending device does not become high, or the fixed piping cannot be used. That is, since the work roll is easily worn out by the support roll due to the rolling operation, it is necessary to periodically change the roll. However, in the rolling mill shown in Fig. 1, the incremental bending device is installed in the protruding block, so that it is not necessary to disassemble the hydraulic piping of the incremental bending device during the roll changing operation, and the hydraulic pressure control valve can be connected by the fixed piping. Therefore, a servo valve for performing high response oil pressure control can be employed. On the other hand, since the decreasing bending device of the rolling mill of Fig. 1 is incorporated in the upper and lower support roller bearing housings, it is necessary to disassemble the hydraulic piping of the decreasing bending device every time the roller changing operation is performed. When the hydraulic piping is disassembled and assembled, the possibility of mixing small foreign matter in the hydraulic piping is increased, so that the servo valve for high-response hydraulic pressure control cannot be used. In addition, it is necessary to connect the hydraulic control valve by a hydraulic pipe which is flexible and has a flexible structure such as a flexible pipe, so that the hydraulic pressure to be transmitted is absorbed and attenuated.
即，可藉由固定安裝之油壓配管連接油壓控制閥，或必須藉由撓性配管等呈柔性構造且拆裝自如之油壓配管連接油壓控制閥，乃致使遞減彎曲裝置之響應度低於遞增彎曲裝置之響應度之最大原因。That is, the hydraulic control valve can be connected by a hydraulic pipe that is fixedly mounted, or the hydraulic control valve must be connected by a flexible pipe such as a flexible pipe or a flexible hydraulic pipe, thereby causing the responsiveness of the decreasing bending device. The biggest reason for the lower response than the incremental bending device.
又，由於遞減彎曲裝置無法高響應控制，因此輥軋開始時、輥軋完畢時負載或解除遞減彎曲力時造成輥軋不穩定，以致製品品質惡化且產能降低。Further, since the decreasing bending device cannot be highly responsive, the rolling is unstable when the rolling is started or the load is released or the bending force is released, so that the quality of the product is deteriorated and the productivity is lowered.
亦即尚未負載輥軋載荷之空轉時無法負載遞減彎曲力。因此，必須於輥軋開始時迅速負載遞減彎曲力，另於輥軋完畢時必須迅速回復輥平衡狀態。其中，藉由響應度差之遞減彎曲裝置之控制變更輥彎曲力時，輥軋材料前端尾端因未負載預定之遞減彎曲力以致形狀不良部增長。That is, when the idling of the rolling load is not applied, the bending force cannot be reduced. Therefore, it is necessary to rapidly reduce the bending force at the start of the rolling, and it is necessary to quickly return the roller balance state at the time of completion of the rolling. In the case where the bending force of the roller is changed by the control of the decreasing bending device of the responsiveness difference, the leading end of the rolling material is decremented by the predetermined load, so that the shape defect portion is increased.
即，第2發現在於，第1圖所示形式之輥軋機中產生遞減彎曲力作用時，難以於輥軋中迅速變更設定，因此無法去除輥軋材料入料側板厚或輥軋材料溫度等輥軋中會變動之干擾因素，以致製品品質或良品率降低。In other words, in the case where the rolling machine of the form shown in Fig. 1 has a decreasing bending force, it is difficult to rapidly change the setting during the rolling, and therefore it is impossible to remove the roll material such as the thickness of the material of the rolling material or the temperature of the rolling material. Interference factors that may change during rolling, resulting in a decrease in product quality or yield.
本發明應解決之課題在於提供一種於遞減彎曲裝置之響應度低於遞增彎曲裝置之響應度之輥軋機中，使工作輥產生遞減彎曲力作用時，亦可賦予高響應之軋板冠高‧形狀控制機能之金屬板材之輥軋方法。SUMMARY OF THE INVENTION The object of the present invention is to provide a rolling mill having a higher response than a progressive bending device in which the responsiveness of the decreasing bending device is lower than that of the incremental bending device. Rolling method for sheet metal of shape control function.
本發明人為解決前述課題，經反覆仔細檢討後，發現藉由在遞減彎曲裝置之響應度低於遞增彎曲裝置之響應度之輥軋機中，設定兩彎曲裝置之合力所形成之彎曲力，且輥軋中之控制僅由響應度高之遞增彎曲裝置進行，可進行高響應之軋板冠高‧形狀控制，本發明因而產生。In order to solve the above problems, the inventors have carefully reviewed and found that the bending force formed by the resultant force of the two bending devices is set by the rolling mill in which the responsiveness of the decreasing bending device is lower than that of the incremental bending device, and the roller is formed. The control in the rolling is performed only by the incremental bending device having a high degree of responsivity, and the crown height and shape control of the high-resistance rolling sheet can be performed, and the present invention is produced.
即，為控制軋板冠高‧形狀，所用之輥軋方法係於產生遞減彎曲力作用作為工作輥彎曲力時，利用響應度高之遞增彎曲裝置變更輥軋開始時及輥軋完畢時之輥彎曲力。高響應之遞增彎曲裝置可補償(彌補)遞減彎曲裝置之響應度。That is, in order to control the crown height ‧ shape of the rolled sheet, the rolling method used is to change the rolling force at the start of the rolling and the completion of the rolling by using the increasing bending device with a high degree of resilience as a work roll bending force Bending force. The high response incremental bending device compensates (compensates) the responsiveness of the decreasing bending device.
進而，對於輥軋材料入料側板厚或輥軋材料溫度等輥軋中會變動之干擾，藉由高響應之遞增彎曲裝置之控制，可形成良好之軋板冠高‧形狀，並可顯著改善製品品質及產能。Furthermore, the variation of the rolling material feeding side thickness or the rolling material temperature and the like may be changed by the high-response incremental bending device, and a good rolling plate crown height ‧ shape can be formed and can be significantly improved Product quality and production capacity.
以第1圖所示之輥軋機為例，其構造係基於換輥時配管拆裝容易度故於遞減彎曲裝置之油壓配管採用呈柔性構造且拆裝自如之油壓配管。因此輥軋機具有遞減彎曲裝置之響應度勢必低於遞增彎曲裝置之響應度之特性。但該輥軋機之構造係將遞增彎曲裝置配置於突出塊，因此兼具可於突出塊中配置大容量之遞增彎曲裝置，及可藉由固定安裝之油壓配管連接油壓控制閥故可形成響應度高之遞增彎曲裝置之優良特性。因此，可達成上述響應度高之輥彎曲力控制。Taking the rolling mill shown in Fig. 1 as an example, the structure is based on the ease of disassembly and assembly of the pipe during the roll change, so that the hydraulic pipe of the declining bending device is a hydraulic pipe which is flexible and detachable. Therefore, the responsiveness of the rolling mill with the decreasing bending device is inevitably lower than the responsiveness of the incremental bending device. However, the structure of the rolling mill is such that the incremental bending device is disposed on the protruding block, so that the incremental bending device can be disposed in the protruding block, and the oil pressure control valve can be connected by the hydraulic pipe which is fixedly mounted. The superior characteristics of the incremental bending device with high responsiveness. Therefore, the roll bending force control with high responsivity described above can be achieved.
基於該等上述發現，本發明人完成一金屬板材之輥軋方法之發明，即使於遞減彎曲裝置之響應度低於遞增彎曲裝置之響應度之輥軋機，亦可賦予高響應之軋板冠高‧形狀控制機能。其要旨如下。Based on the above findings, the inventors have completed the invention of a rolling method for a metal sheet, which can impart a high response crown height even in a rolling mill having a lower resilience of the bending device than that of the incremental bending device. ‧ Shape control function. The gist of the following is as follows.
(1)一種金屬板材之輥軋方法，係利用輥軋機進行，該輥軋機係具有一用以產生遞增彎曲力之遞增彎曲裝置、及一用以產生遞減彎曲力之遞減彎曲裝置，且前述遞減彎曲裝置之響應度低於前述遞增彎曲裝置者；其特徵在於輥軋開始前，使遞增彎曲力與遞減彎曲力雙方作用，合力為相當於輥平衡力之輥彎曲力並作用於工作輥軸承座。(1) A method of rolling a metal sheet by a rolling mill having an incremental bending device for generating an increasing bending force, and a decreasing bending device for generating a decreasing bending force, and the aforementioned decreasing The responsiveness of the bending device is lower than that of the incremental bending device described above; it is characterized in that both the incremental bending force and the decreasing bending force are applied before the rolling starts, and the resultant force is the roller bending force corresponding to the roller balancing force and acts on the work roll chock .
之後，一面改變遞減彎曲力達預定之輥軋中遞減彎曲力，一面改變遞增彎曲力，使遞減彎曲力與遞增彎曲力之合力維持輥彎曲力。此步驟若最初先將遞減彎曲力設為預定之輥軋中遞減彎曲力，並使遞增彎曲力作用於作業輥軸承座，達到遞減彎曲力與遞增彎曲力之合力形成輥彎曲力之狀態，則可予以省略。Thereafter, while the decreasing bending force is changed to the decreasing bending force in the predetermined rolling, the incremental bending force is changed, so that the combined force of the decreasing bending force and the increasing bending force maintains the bending force of the roller. If the step is to first set the decreasing bending force to a predetermined rolling force in the predetermined rolling, and the incremental bending force acts on the work roll chock to achieve the state of the roll bending force by the combined force of the decreasing bending force and the increasing bending force, Can be omitted.
之後，輥軋開始時，繼續控制遞減彎曲力保持在前述預定之輥軋中遞減彎曲力同時改變遞增彎曲力，合力為預定之輥軋中工作輥彎曲力並作用於工作輥軸承座。Thereafter, at the beginning of the rolling, the control of the decreasing bending force is continued to maintain the decreasing bending force in the aforementioned predetermined rolling while changing the incremental bending force, and the resultant force is the predetermined bending force of the work roll in the rolling and acts on the work roll chock.
輥軋中，藉由控制遞增彎曲力，於維持前述預定之輥軋中工作輥彎曲力之狀態下進行輥軋；之後，輥軋完畢時，改變遞增彎曲力，並與遞減彎曲力合力為相當於輥平衡力之輥彎曲力後作用於工作輥軸承座，且於該狀態下結束金屬板材之輥軋。In the rolling, by controlling the incremental bending force, the rolling is performed while maintaining the bending force of the work roll in the predetermined rolling; after that, when the rolling is completed, the incremental bending force is changed, and the resultant force is equal to the decreasing bending force. After the roller bending force of the roller balance force acts on the work roll chock, and in this state, the rolling of the metal sheet is finished.
之後，為維持前述合力而成之輥彎曲力，減少遞減彎曲力與遞增彎曲力。該步驟若維持遞減彎曲力為預定之輥軋中遞減彎曲力，並將遞增彎曲力作用於工作輥軸承座，達到遞減彎曲力與遞增彎曲力之合力形成輥彎曲力之狀態，亦可予以省略。Thereafter, in order to maintain the above-described resultant roll bending force, the decreasing bending force and the increasing bending force are reduced. In this step, if the decreasing bending force is maintained as the decreasing bending force in the predetermined rolling, and the increasing bending force is applied to the work roll chock, the combined force of the decreasing bending force and the increasing bending force is formed to form the bending force of the roller, and may be omitted. .
(2)如(1)之金屬板材之輥軋方法，係利用輥軋機進行，該輥軋機至少具備一對上下工作輥與一對分別支持該等工作輥之上下支撐輥，並將構成分別與上下工作輥對應之前述遞增彎曲裝置的遞增油壓缸，藉由業經固定之油壓配管連接各自之油壓控制閥且裝入朝輥軋機機架內側突出之突出塊；進而，至少構成與上工作輥對應之前述遞減彎曲裝置的遞減油壓缸，係藉由呈柔性構造且拆裝自如之油壓配管連接油壓控制閥，並裝入上支撐輥軸承座。(2) The rolling method of the metal sheet according to (1), which is carried out by a roll mill having at least one pair of upper and lower work rolls and a pair of upper support rolls respectively supporting the work rolls, and the composition is respectively The incremental hydraulic cylinder corresponding to the incremental bending device corresponding to the upper and lower work rolls is connected to the respective hydraulic control valve by the fixed hydraulic pressure pipe and is inserted into the protruding block protruding toward the inner side of the rolling mill frame; further, at least The step-down hydraulic cylinder corresponding to the aforementioned descending bending device of the work roll is connected to the oil pressure control valve by a hydraulic pipe which is flexible and detachable, and is loaded into the upper support roll chock.
(3)如(2)之金屬板材之輥軋方法，係測量前述遞減油壓缸內或該油壓缸相連之油壓配管內的油壓，並依據該測量值控制遞增彎曲力，使作用於工作輥軸承座之輥彎曲力達到預定值。(3) The rolling method of the metal sheet according to (2), which measures the oil pressure in the hydraulic pipe connected to the hydraulic cylinder or the hydraulic cylinder, and controls the increasing bending force according to the measured value to make the effect The roll bending force of the work roll chock reaches a predetermined value.
其中所謂輥彎曲力之預定值，係由輥軋條件等預先求得之輥彎曲力值。此外，作用於工作輥軸承座之輥彎曲力，係遞增彎曲力與遞減彎曲力之合力。The predetermined value of the roll bending force is a roll bending force value obtained in advance by rolling conditions or the like. In addition, the bending force of the roller acting on the work roll chock is the combination of the increasing bending force and the decreasing bending force.
本發明之輥軋方法，係利用響應度高之遞增彎曲裝置進行輥軋開始時及輥軋完畢時之輥彎曲力變更。In the rolling method of the present invention, the roll bending force at the start of the rolling and at the completion of the rolling is changed by the incremental bending device having a high degree of responsivity.
因此，基於換輥時之配管拆裝容易度，於遞減彎曲裝置之油壓配管採用呈柔性構造且拆裝自如之油壓配管，如此一來即使為遞減彎曲裝置之響應度低於遞增彎曲裝置之響應度之輥軋機，亦可由高響應之遞增彎曲裝置補償遞減彎曲裝置之響應度，藉以賦予高響應且強力之軋板冠高‧形狀控制機能。Therefore, based on the ease of disassembly and assembly of the pipe when the roll is changed, the hydraulic pipe of the decreasing bending device adopts a hydraulic pipe which is flexible and freely detachable, so that the responsiveness of the decreasing bending device is lower than that of the incremental bending device. The responsive rolling mill can also compensate for the responsiveness of the decreasing bending device by a high-response incremental bending device, thereby imparting a high-response and strong rolling plate crown height ‧ shape control function.
是以，藉由本發明之輥軋方法，即使面對輥軋材料入料側板厚或輥軋材料溫度等輥軋中會變動之干擾仍可形成良好之軋板冠高‧形狀，並可大幅改善製品品質及良品率。Therefore, by the rolling method of the present invention, even if the surface of the rolling material feed side thickness or the rolling material temperature is disturbed, the deformation can still form a good crown height and shape, and can be greatly improved. Product quality and yield.
第1圖係顯示本發明目的物之輥軋機之一構造例之側視圖。Fig. 1 is a side view showing a configuration example of a rolling mill of the object of the present invention.
第2圖所示者係本發明之輥軋方法之操作流程一例。An example of the operation flow of the rolling method of the present invention is shown in Fig. 2.
第3圖所示者係第2圖之操作流程下輥彎曲力等之時間序列變化。The figure shown in Fig. 3 is a time series change of the roll bending force or the like in the operation flow of Fig. 2.
第4圖所示者係遞減彎曲裝置之響應度低時輥彎曲力等之時間序列變化。The figure shown in Fig. 4 is a time series change of the roll bending force or the like when the resilience of the decreasing bending device is low.
第5圖所示者係本發明之輥軋方法之操作流程另一例。The figure shown in Fig. 5 is another example of the operation flow of the rolling method of the present invention.
第6圖所示者係第5圖之操作流程下輥彎曲力等之時間序列變化。The figure shown in Fig. 6 is a time series change of the roll bending force or the like in the operation flow of Fig. 5.
第7圖係顯示本發明目的物之輥軋機之另一構造例之側視圖。Fig. 7 is a side view showing another configuration example of the rolling mill of the object of the present invention.
第8圖係顯示本發明目的物之輥軋機之另一構造例之側視圖。Fig. 8 is a side view showing another configuration example of the rolling mill of the object of the present invention.
以下參照第1圖～第8圖說明本發明之輥軋方法。The rolling method of the present invention will be described below with reference to Figs. 1 to 8 .
第1圖係顯示本發明目的物之輥軋機之一構造例之側視圖，並以該輥軋機為例進行說明。如該圖所示，本發明目的物之輥軋機，係一具有上下一對工作輥1-1、1-2與用以分別支持該等工作輥之上下一對支撐輥2-1、2-2之多段輥軋機。Fig. 1 is a side view showing a structural example of a rolling mill of the object of the present invention, and the rolling mill will be described as an example. As shown in the figure, the rolling mill of the object of the present invention has a pair of upper and lower work rolls 1-1, 1-2 and supports a pair of support rolls 2-1, 2- above and below the work rolls, respectively. 2 multi-stage rolling mill.
另，該圖所示之輥軋機係呈薄鋼帶之串列式精軋機等所採用之形式之4段輥軋機，但並非以此為限，6段輥軋機亦可。Further, the rolling mill shown in the figure is a four-stage rolling mill in the form of a tandem finishing mill of a thin steel strip, but not limited thereto, and a six-stage rolling mill may be used.
且該輥軋機中，朝機架9內側突出之突出塊5-1、5-2中裝入有用以於上工作輥1-1負載遞增彎曲力之上遞增彎曲裝置6-1、6-2、與用以於下工作輥1-2負載遞增彎曲力之下遞增彎曲裝置6-3、6-4。In the rolling mill, the protruding blocks 5-1, 5-2 protruding toward the inner side of the frame 9 are loaded with an incremental bending device 6-1, 6-2 for increasing the load of the upper work roll 1-1. The bending devices 6-3, 6-4 are incremented under the increasing bending force for the lower work rolls 1-2.
因此，工作輥1-1、1-2在輥軋運轉下將造成損耗，故須定期換輥。但第1圖之輥軋機無須於換輥作業時拆裝遞增彎曲裝置之油壓配管。各遞增彎曲裝置6-1～6-4可藉由固定安裝之油壓配管連接各油壓控制閥，因此可採用用以進行高響應油壓控制之伺服閥。如此一來，即可形成響應度高之遞增彎曲裝置。Therefore, the work rolls 1-1, 1-2 will cause wear under the rolling operation, so the rolls must be periodically changed. However, the rolling mill of Fig. 1 does not need to disassemble the hydraulic piping of the incremental bending device during the roll changing operation. Each of the incremental bending devices 6-1 to 6-4 can be connected to each of the hydraulic control valves by a fixedly mounted hydraulic pressure pipe, so that a servo valve for performing high response hydraulic pressure control can be employed. In this way, an incremental bending device with high responsivity can be formed.
另外，用以於上工作輥1-1負載遞減彎曲力之上遞減彎曲裝置7-1、7-2係裝入上支撐輥軸承座4-1，用以於下工作輥1-2負載遞減彎曲力之下遞減彎曲裝置7-3、7-4係裝入下支撐輥軸承座4-2。In addition, the upper bending roller 7-1, 7-2 is used to load the upper supporting roller bearing block 4-1 on the upper working roller 1-1 with decreasing load bending force for the lower working roller 1-2 load decrement The decreasing bending means 7-3, 7-4 under the bending force are fitted into the lower backup roll chock 4-2.
因此，支撐輥2-1、2-2部分雖不及工作輥之程度，但於輥軋運轉下仍將造成損耗，故須定期換輥。如此一來，該輥軋機勢須於換輥作業時拆裝遞減彎曲裝置7-1～7-4之油壓配管，以致拆裝時油壓配管內混入微小異物之可能性提高。因此，各遞減彎曲裝置7-1～7-4難以採用用以進行高響應油壓控制之伺服閥。又，藉由撓性配管等呈柔性構造且拆裝自如之油壓配管連接各油壓控制閥以便於拆裝配管時，因柔性構造之故，乃有吸收油壓之變動以致衰減之情形。Therefore, although the portions of the support rolls 2-1 and 2-2 are not as good as the work rolls, they are still worn out under the rolling operation, so the rolls must be periodically changed. As a result, the rolling mill is required to disassemble and reduce the hydraulic piping of the bending devices 7-1 to 7-4 during the roll changing operation, so that the possibility of mixing minute foreign matter in the hydraulic piping during assembly and disassembly is increased. Therefore, it is difficult for each of the decreasing bending devices 7-1 to 7-4 to employ a servo valve for performing high-response hydraulic pressure control. Further, when the hydraulic pressure control valves are connected by a flexible pipe such as a flexible pipe or the like, and the hydraulic pressure control pipes are connected to each other to facilitate disassembly and assembly of the pipe, the flexible structure is absorbed to absorb the fluctuation of the oil pressure so as to be attenuated.
是以，基於換輥時之配管拆裝容易度，於遞減彎曲裝置7-1～7-4之油壓配管採用撓性配管而不採用伺服閥時，遞減彎曲裝置之響應度將低於遞增彎曲裝置之響應度。Therefore, based on the ease of disassembly and assembly of the pipe when the roll is changed, when the hydraulic pipe of the decreasing bending device 7-1 to 7-4 is a flexible pipe instead of a servo valve, the responsiveness of the decreasing bending device is lower than the increment. The responsiveness of the bending device.
因此，為控制軋板冠高‧形狀而產生遞減彎曲力作用以作為工作輥彎曲力時，難以於輥軋中迅速變更設定。如此一來，對於輥軋材料入料側板厚或輥軋材料溫度等輥軋中會變動之干擾因素，無法進行適當之輥彎曲控制，以致有降低製品品質或良品率之情形。Therefore, in order to control the crown height of the rolled plate and to produce a decreasing bending force as the work roll bending force, it is difficult to rapidly change the setting during the rolling. As a result, it is impossible to perform appropriate roll bending control for the disturbance factor of the rolling material feeding side plate thickness or the rolling material temperature and the like, so that the product quality or the yield rate can be lowered.
另一方面，尚未負載輥軋載荷之空轉時無法負載遞減彎曲力。運用遞減彎曲力時，必須於輥軋開始時迅速由空轉時之輥平衡狀態切換至遞減彎曲力，再於輥軋完畢時迅速回復輥平衡狀態。On the other hand, when the idling of the rolling load is not applied, the load cannot be decremented. When the decreasing bending force is applied, it is necessary to quickly switch from the roller balance state at the start of the rolling to the decreasing bending force at the start of the rolling, and then quickly return to the roller balance state at the completion of the rolling.
因此，若由響應度差之遞減彎曲裝置控制輥彎曲力之變更，輥軋材料前端尾端可能因未負載預定之遞減彎曲力以致形狀不良部增長。Therefore, if the bending force is controlled by the decreasing bending device of the responsiveness difference, the leading end of the rolling material may be decremented by the predetermined load, so that the shape defect portion is increased.
其中，專利文獻2所載之輥彎曲裝置係由伺服閥之二次配管長度決定輥彎曲裝置之響應度。即，將各伺服閥至油壓缸之配管長度縮短至2m以內，並藉由伺服閥控制遞增側之油壓與遞減側之油壓之差，可確保彎曲力之高響應度。但工作輥或支撐輥之換輥作業必須定期實施，故將遞增側與遞減側雙方做成固定油壓配管不切實際。因此，對於提高產生遞減彎曲作用時之響應度之本案發明之課題，無法充分解決。Among them, the roll bending device disclosed in Patent Document 2 determines the responsiveness of the roll bending device by the secondary pipe length of the servo valve. That is, the length of the piping from each servo valve to the hydraulic cylinder is shortened to within 2 m, and the servo valve controls the difference between the oil pressure on the increasing side and the oil pressure on the decreasing side to ensure high responsiveness of the bending force. However, the roll change operation of the work roll or the support roll must be carried out periodically, so it is impractical to make both the incremental side and the descending side into a fixed hydraulic pressure pipe. Therefore, the problem of the present invention for improving the responsivity when the decreasing bending action is generated cannot be sufficiently solved.
本發明之輥軋方法亦解決專利文獻2中之課題。The rolling method of the present invention also solves the problem of Patent Document 2.
另，遞增彎曲裝置係指用以將增大輥縫方向上之力施於工作輥軸承座上之油壓裝置。所謂遞增彎曲裝置乃包含其致動器亦即油壓缸之裝置之總稱。本發明為簡化說明，所謂遞增彎曲裝置，在無特別註明下係指其致動器，即油壓缸。並且將遞增彎曲裝置加載於工作輥上之力稱為遞增彎曲力。反之，用以將縮小輥縫方向上之力施於工作輥軸承座上之油壓裝置稱為遞減彎曲裝置，並且將其加載於工作輥上之力稱為遞減彎曲力。但，本發明為簡化說明，所謂遞減彎曲裝置，在無特別註明下係則指其致動器，即油壓缸。In addition, the incremental bending means refers to a hydraulic device for applying a force in the direction of the roll gap to the work roll bearing housing. The so-called incremental bending device is a general term for a device including an actuator, that is, a hydraulic cylinder. In order to simplify the description, the present invention refers to an incremental bending device, which means an actuator thereof, that is, a hydraulic cylinder, unless otherwise specified. And the force that loads the incremental bending device onto the work roll is referred to as incremental bending force. On the contrary, the hydraulic device for applying the force in the direction of the reduction of the roll gap to the work roll bearing housing is referred to as a decreasing bending device, and the force for loading it on the work roll is referred to as a decreasing bending force. However, the present invention is a simplified description, and the so-called decreasing bending device refers to an actuator, that is, a hydraulic cylinder, unless otherwise specified.
第2圖所示者係本發明之輥軋方法之操作流程一例，再具體言之，係響應度高之遞增彎曲裝置與相較之下響應度稍低之遞減彎曲裝置之操作流程。The figure shown in Fig. 2 is an example of the operation flow of the rolling method of the present invention, and more specifically, the operation flow of the incremental bending device having a high degree of responsivity and the decreasing bending device having a slightly lower response degree.
又，第3圖顯示在該輥軋方法下，對一根輥軋材料進行輥軋運轉時相伴而生之輥彎曲力等之時間序列變化。第3圖中由上而下顯示輥軋載荷、遞增彎曲裝置之輸出、遞減彎曲裝置之輸出、合力之工作輥彎曲力之時間序列變化。以下根據第2圖、第3圖進行說明。Further, Fig. 3 is a view showing a time-series change of the roll bending force or the like which is caused by the rolling operation of one of the rolled materials under the rolling method. In Fig. 3, the time series change of the rolling load, the output of the incremental bending device, the output of the decreasing bending device, and the resultant work roll bending force are displayed from top to bottom. Hereinafter, description will be made based on the second and third figures.
首先於輥軋開始前，實施對應後續將進行輥軋之輥軋材料之設定計算，並演算‧輸出工作輥彎曲力之設定值FR 。其中FR 演算得出負值，即遞減彎曲力。另，本發明中，輥彎曲力係將遞增彎曲力(遞增方向(拉開輥之方向)之力)定義為正值，並將遞減彎曲力(遞減方向(壓下輥之方向)之力)定義為負值。First, before the start of the rolling, the setting calculation of the rolling material corresponding to the subsequent rolling is performed, and the set value F R of the bending force of the output work roll is calculated. Among them, the F R calculus yields a negative value, that is, the bending force is decremented. Further, in the present invention, the roll bending force defines an increasing bending force (the force in the increasing direction (the direction in which the roller is pulled)) as a positive value, and decrements the bending force (the direction in which the direction of the roller is depressed) Defined as a negative value.
輥軋開始前，使遞增彎曲力與遞減彎曲力雙方作用，合力為相當於輥平衡力(FB )之遞增側輥彎曲力並作用於工作輥軸承座。Before the start of rolling, both the incremental bending force and the decreasing bending force are applied, and the resultant force is the incremental side roller bending force corresponding to the roller balance force (F B ) and acts on the work roll chock.
即，輥軋前之空轉時，假設遞增彎曲裝置輸出為IB (＞0)，遞減彎曲裝置輸出為DB (＜0)，IB +DB 形成輥平衡力FB (＞0)。That is, when idling before rolling, it is assumed that the incremental bending device output is I B (>0), the decreasing bending device output is D B (<0), and I B +D B forms the roller balancing force F B (>0).
另，輥平衡力FB ，係定為即使空轉狀態下之輥軋機加減速，由電動機驅動之工作輥與被動之支撐輥仍不滑動之力，此外DB 係按遞減彎曲裝置之致動器不離工作輥軸承座之程度之最小油壓設定即可。In addition, the roller balance force F B is determined to be a force that does not slide the work roll driven by the motor and the passive support roller even if the roll mill is accelerated or decelerated in an idling state, and the D B is an actuator of the decreasing bending device. The minimum oil pressure setting is not to the extent of the work roll chock.
之後於輥軋開始前之某一時刻(時間軸上之a點)，將足以產生輥軋中工作輥彎曲力FR 作用之預定輥軋中遞減彎曲裝置輸出DS ，按DS =FR -IR 之算式演算得出。且同時輸出DS 及IS ，以使輥平衡力(FB )達到一定。After a certain time in (a point on the time axis) before the start of the roll, the roll is sufficient to produce the work roll bending force F R Role in predetermined decrement roll bending means outputs D S, D S = F R by -I R calculation formula. At the same time, D S and I S are outputted so that the roller balance force (F B ) reaches a certain level.
其中，IR 係輥軋中之遞增彎曲裝置輸出，且預先決定接近可控制DS 之絕對值不致過大之最小值之值，IS 係已設定IS +DS =FB 之遞增彎曲裝置輸出。Wherein, the I R is an incremental bending device output in the rolling, and the value of the minimum value that is close to the absolute value of the controllable D S is determined in advance, and the I S is an incremental bending device that has set I S + D S = F B Output.
因此，於設定時刻，合力之工作輥彎曲力仍維持FB 之狀態，未有實質上之變化。Therefore, at the set time, the resultant work roll bending force maintains the F B state without substantial change.
其次，一開始輥軋後，於繼續控制遞減彎曲力保持一定值同時降低遞增彎曲力，合力而成預定之遞減側之輥彎曲力並作用於工作輥軸承座之狀態下，進行輥軋。Next, after the first rolling, the rolling force is continuously controlled to maintain a certain value while maintaining a constant value while reducing the incremental bending force, and the resultant bending force is formed on the predetermined decreasing side and acts on the work roll chock to perform rolling.
即，於輥軋開始時刻(時間軸上之b點)，將遞增彎曲裝置輸出由IS 變更為IR 。如此一來，於響應慢之遞減彎曲裝置輸出維持DS 之狀態下，藉由響應快之遞增彎曲裝置之控制，可將合力之工作輥彎曲力由輥平衡力FB (＞0)迅速切換為遞減彎曲力FR (＜0)。That is, at the start of rolling (point b on the time axis), the incremental bending device output is changed from I S to I R . In this way, in the state of responding to the slow decreasing bending device output maintaining D S , the bending force of the working roller of the resultant force can be quickly switched by the roller balancing force F B (>0) by the control of the fast increasing bending device. To reduce the bending force F R (<0).
另，所謂輥軋開始時(b)係指開始輥軋之時間點，該時間點之偵測，舉例言之，按設定滾軋機之輥軋載荷測量用測力計所偵測之載荷，超過設定計算所預測演算之輥軋載荷之例如30%之時刻之方法決定即可。該數值宜設定於10～30%之間。如此可與輥平衡力之變動有所區別，並可迅速偵測輥軋開始。In addition, the start of the rolling (b) refers to the time point at which the rolling is started, and the detection of the time point, for example, the load detected by the dynamometer for measuring the rolling load of the rolling mill exceeds It suffices to set a method of calculating, for example, 30% of the rolling load of the predicted calculation. This value should be set between 10 and 30%. This can be distinguished from the change in the balance of the rolls and can quickly detect the start of the roll.
之後於輥軋完畢時，將輥彎曲力回復輥軋開始前之狀態，再合力為相當於輥平衡力之遞增側之輥彎曲力並作用於工作輥軸承座，且於該狀態下結束金屬板材之輥軋。Then, when the rolling is completed, the bending force of the roller is restored to the state before the start of the rolling, and the resultant force is the bending force of the roller corresponding to the increasing side of the balancing force of the roller and acts on the work roll chock, and the metal sheet is finished in this state. Rolling.
即，於輥軋完畢時刻(時間軸上之c點)，於遞減彎曲裝置輸出維持DS 之狀態下，將響應快之遞增彎曲裝置輸出由IR 回復到IS 。如此一來，可將合力之工作輥彎曲力由遞減彎曲力FR (＜0)迅速切換為輥平衡力FB (＞0)。That is, in the rolling completion time (c point on the time axis), decreasing the bending means in a state maintaining the output of the D S, the quick response of the output responses from the incrementing means bending to I R I S. In this way, the resultant work roll bending force can be quickly switched to the roll balance force F B (>0) by the decreasing bending force F R (<0).
另，所謂輥軋完畢時刻(時間軸上之c點)係指輥軋完畢時。該時刻之偵測按設定滾軋機之輥軋載荷測量用測力計所偵測之載荷，低於輥軋中實際輥軋載荷之時間序列平均值之例如50%之時刻之方法決定即可。該數值可任意設定，但宜設定於50～80%之間。如此可與輥軋中之輥彎曲力之變動有所區別，並可迅速偵測輥軋完畢。In addition, the time of completion of rolling (point c on the time axis) means when the rolling is completed. The detection of the moment is determined by the method of setting the load detected by the dynamometer for the rolling load measurement of the rolling mill, which is lower than the time series average value of the actual rolling load in the rolling, for example, 50%. This value can be arbitrarily set, but should be set between 50 and 80%. This can be distinguished from the variation of the bending force of the roll in the rolling, and the rolling can be quickly detected.
之後將輥軋完畢時刻經過例如1～3秒後之時間點設為作業完畢時刻d，於該時刻，將遞增彎曲裝置輸出設為IB ，將遞減彎曲裝置輸出設為DB 。在此變更下，合力之工作輥彎曲力大致維持為輥平衡力FB 。Then, the time point after the completion of the rolling completion is, for example, 1 to 3 seconds, the operation completion time d, at which time the incremental bending device output is I B and the decreasing bending device output is D B . Under this change, the resultant work roll bending force is maintained substantially at the roll balance force F B .
如第2圖、第3圖所示，本發明之輥軋方法中係利用配置於突出塊之響應度高之遞增彎曲裝置變更輥軋開始時及輥軋完畢時之輥彎曲力。因此，於勢須配備響應度低於遞增彎曲裝置之遞減彎曲裝置時，響應度高之遞增彎曲裝置亦將補償該差異，因此可賦予高響應且強力之軋板冠高‧形狀控制機能。As shown in Fig. 2 and Fig. 3, in the rolling method of the present invention, the roll bending force at the start of the rolling and at the completion of the rolling is changed by the incremental bending device having a high degree of responsivity disposed in the protruding block. Therefore, when the declining bending device having a lower response than the incremental bending device is provided, the incremental bending device having a high responsivity will compensate for the difference, thereby giving a high response and a strong rolling plate crown height ‧ shape control function.
進而，輥軋中因種種要因(干擾)改變輥軋力時，仍可藉由高響應之遞增彎曲裝置迅速控制，維持最佳工作輥彎曲力。Further, when the rolling force is changed due to various factors (interference) in the rolling, the high-response incremental bending device can be quickly controlled to maintain the optimum work roll bending force.
即，藉由本發明之輥軋方法，即使面對輥軋材料入料側板厚或輥軋材料溫度等輥軋中會變動之干擾，亦可形成良好之軋板冠高‧形狀，並可大幅改善製品品質及良品率。That is, with the rolling method of the present invention, it is possible to form a good crown height and shape of the rolled sheet even if it is disturbed by variations in the rolling material side thickness or the rolling material temperature, etc., and can be greatly improved. Product quality and yield.
第4圖所示者係遞減彎曲裝置之響應度低時(特別是具有若反作用力消失則壓力下降之油壓特性時)輥彎曲力等之時間序列變化。如同第3圖，顯示隨著第2圖所示之遞增彎曲裝置與遞減彎曲裝置之操作流程，對一根輥軋材料進行輥軋運轉時相伴而生之輥彎曲力等之時間序列變化。即，顯示遞減彎曲裝置之響應度較第2圖、第3圖慢者之例。The figure shown in Fig. 4 is a time-series change of the roll bending force or the like when the resilience of the decreasing bending device is low (especially when the hydraulic pressure characteristic is lowered if the reaction force disappears). As shown in Fig. 3, a time-series change of the roll bending force or the like accompanying the rolling operation of one rolled material is shown in the operation flow of the incremental bending device and the decreasing bending device shown in Fig. 2. That is, an example in which the responsiveness of the decreasing bending device is slower than that of the second and third figures is shown.
如此例所示，遞減彎曲裝置之響應度低時，響應度高之遞增彎曲裝置於時刻b及c急遽變化，故響應度差之遞減彎曲裝置之輸出將產生變動。結果，合力之工作輥彎曲力於時刻b延遲到達FR ，且於時刻c延遲到達FB 。第5圖所示之輥軋方法即用以解決此一問題。As shown in this example, when the responsiveness of the decreasing bending device is low, the incremental bending device having a high responsiveness changes rapidly at times b and c, so that the output of the decreasing bending device with a small responsiveness changes. As a result, the resultant work roll bending force is delayed to reach F R at time b, and is delayed to reach F B at time c. The rolling method shown in Fig. 5 is used to solve this problem.
第5圖所示者係本發明之輥軋方法之操作流程另一例，顯示響應度高之遞增彎曲裝置與響應度低於第2圖、第3圖時之遞減彎曲裝置之操作流程。以下根據該圖進行說明。Fig. 5 is a view showing another example of the operation flow of the rolling method of the present invention, showing an operation flow of the incremental bending device having a high degree of responsivity and a decreasing bending device having a lower response than the second and third figures. The following description will be made based on this figure.
第5圖所示之輥軋方法係依據測量遞減彎曲裝置相連之油壓配管內之油壓所得之遞減彎曲力、或設於該裝置中之測力計所測得之遞減彎曲力控制遞增彎曲裝置。即，依遞減彎曲力或遞減彎曲裝置之油壓控制遞增彎曲裝置之輸出，使輥軋前後工作輥彎曲力達輥平衡力FB ，並使輥軋中工作輥彎曲力達FR 。另，其他控制同於第2圖所示之輥軋方法。The rolling method shown in Fig. 5 is based on the decreasing bending force obtained by measuring the oil pressure in the hydraulic piping connected to the decreasing bending device, or the decreasing bending force measured by the dynamometer provided in the device to control the incremental bending. Device. That is, the output of the bending device is controlled by the decreasing bending force or the oil pressure of the decreasing bending device, so that the bending force of the working roller before and after the rolling reaches the roller balancing force F B , and the bending force of the working roller in the rolling reaches F R . In addition, the other control is the same as the rolling method shown in Fig. 2.
以第5圖所示之輥軋方法進行輥軋，即如第6圖所示，遞增彎曲裝置可補償遞減彎曲裝置之輸出變動，且工作輥彎曲力實現高響應之控制。The rolling is performed by the rolling method shown in Fig. 5, that is, as shown in Fig. 6, the incremental bending device compensates for the output variation of the decreasing bending device, and the work roll bending force achieves high response control.
又，即使不測量輥軋中之遞減彎曲力、或不藉油壓測量進行回饋控制，亦可藉由事先預測遞減彎曲裝置之輸出變動，並設定用以補償該變動之遞增彎曲裝置之輸出，得到同樣效果。Moreover, even if the decreasing bending force in the rolling is not measured, or the feedback control is not performed by the oil pressure measurement, the output variation of the bending device can be predicted in advance, and the output of the incremental bending device for compensating the fluctuation can be set, Get the same effect.
第7圖及第8圖係顯示本發明目的物之輥軋機之另一構造例之側視圖。該等輥軋機業已改良成可由機架窗12承受附加於上工作輥1-1之本體部之輥軋方向力以增大輥縫，而非藉由突出塊5-1、5-2。Fig. 7 and Fig. 8 are side views showing another configuration example of the rolling mill of the object of the present invention. These rolling mills have been modified so that the roll direction force attached to the body portion of the upper work roll 1-1 can be received by the frame window 12 to increase the roll gap, rather than by the protruding blocks 5-1, 5-2.
其中第7圖所示之輥軋機係於下支撐輥軸承座4-2配備用以於下工作輥1-2負載遞減彎曲力之下遞減彎曲裝置7-3、7-4者。第8圖所示之輥軋機係將下遞減彎曲裝置7-3、7-4配置於位在突出塊5-1、5-2下方之專用突出塊5-3、5-4者。The roll mill shown in Fig. 7 is attached to the lower support roll chock 4-2 for lowering the bending means 7-3, 7-4 under the downward load bending force of the lower work roll 1-2. The rolling mill shown in Fig. 8 arranges the lower decreasing bending devices 7-3, 7-4 in the dedicated protruding blocks 5-3, 5-4 located below the protruding blocks 5-1, 5-2.
該等輥軋機均適用本發明之輥軋方法，因此面對輥軋材料入料側板厚或輥軋材料溫度等輥軋中會變動之干擾仍可形成良好之軋板冠高‧形狀，可大幅改善製品品質及良品率。The rolling mills of the present invention are all applicable to the rolling method of the present invention. Therefore, the interference of the rolling material in the rolling mill material feeding side thickness or the rolling material temperature can form a good crown height and shape. Improve product quality and yield.
本發明可運用於鋼板之輥軋上，特別是需要大輥縫之可逆式輥軋機等。The invention can be applied to the rolling of steel sheets, in particular, a reversible rolling mill which requires a large roll gap.
1-1．．．上工作輥1-1. . . Upper work roll
1-2．．．下工作輥1-2. . . Lower work roll
2-1．．．上支撐輥2-1. . . Upper support roller
2-2．．．下支撐輥2-2. . . Lower support roller
3-1．．．上工作輥軸承座3-1. . . Upper work roll chock
3-2．．．下工作輥軸承座3-2. . . Lower work roll chock
4-1．．．上支撐輥軸承座4-1. . . Upper support roller bearing
4-2．．．下支撐輥軸承座4-2. . . Lower support roller bearing
5-1．．．入料側突出塊5-1. . . Feeding side protruding block
5-2．．．出料側突出塊5-2. . . Outlet side protruding block
5-3．．．入料側下突出塊5-3. . . Projection side lower protruding block
5-4．．．出料側下突出塊5-4. . . Outlet side lower protruding block
6-1．．．入料側上遞增彎曲裝置6-1. . . Incremental bending device on the feed side
6-2．．．出料側上遞增彎曲裝置6-2. . . Incremental bending device on the discharge side
6-3．．．入料側下遞增彎曲裝置6-3. . . Incremental bending device on the feed side
6-4．．．出料側下遞增彎曲裝置6-4. . . Incremental bending device at the discharge side
7-1．．．入料側上遞減彎曲裝置7-1. . . Decreasing bending device on the feeding side
7-2．．．出料側上遞減彎曲裝置7-2. . . Decreasing bending device on the discharge side
7-3．．．入料側下遞減彎曲裝置7-3. . . Feeding side lower decreasing bending device
7-4．．．出料側下遞減彎曲裝置7-4. . . Output side lower decreasing bending device
8-1．．．入料側支撐輥平衡裝置8-1. . . Feed side support roller balancing device
8-2．．．出料側支撐輥平衡裝置8-2. . . Discharge side support roller balancing device
9．．．機架9. . . frame
10．．．輥軋材料10. . . Rolling material
11．．．壓下裝置11. . . Pressing device
12．．．機架窗12. . . Rack window
第1圖係顯示本發明目的物之輥軋機之一構造例之側視圖。Fig. 1 is a side view showing a configuration example of a rolling mill of the object of the present invention.
第2圖所示者係本發明之輥軋方法之操作流程一例。An example of the operation flow of the rolling method of the present invention is shown in Fig. 2.
第3圖所示者係第2圖之操作流程下輥彎曲力等之時間序列變化。The figure shown in Fig. 3 is a time series change of the roll bending force or the like in the operation flow of Fig. 2.
第4圖所示者係遞減彎曲裝置之響應度低時輥彎曲力等之時間序列變化。The figure shown in Fig. 4 is a time series change of the roll bending force or the like when the resilience of the decreasing bending device is low.
第5圖所示者係本發明之輥軋方法之操作流程另一例。The figure shown in Fig. 5 is another example of the operation flow of the rolling method of the present invention.
第6圖所示者係第5圖之操作流程下輥彎曲力等之時間序列變化。The figure shown in Fig. 6 is a time series change of the roll bending force or the like in the operation flow of Fig. 5.
第7圖係顯示本發明目的物之輥軋機之另一構造例之側視圖。Fig. 7 is a side view showing another configuration example of the rolling mill of the object of the present invention.
第8圖係顯示本發明目的物之輥軋機之另一構造例之側視圖。Fig. 8 is a side view showing another configuration example of the rolling mill of the object of the present invention.
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| EP (1) | EP2554284B1 (en) |
| KR (1) | KR101300237B1 (en) |
| CN (1) | CN102834192B (en) |
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| JP5059250B1 (en) * | 2011-03-24 | 2012-10-24 | 新日本製鐵株式会社 | Metal plate rolling machine and rolling method |
| TWI472382B (en) * | 2012-02-16 | 2015-02-11 | China Steel Corp | Calculation method of reduction amount of finish rolling in hot rolling process |
| TWI455766B (en) * | 2012-02-20 | 2014-10-11 | China Steel Corp | Calculation method for the crown height of the finishing stand |
| JP6152320B2 (en) * | 2013-08-19 | 2017-06-21 | 新日鉄住金エンジニアリング株式会社 | Metal plate rolling method and metal plate rolling machine |
| CN105414203B (en) * | 2015-12-10 | 2017-11-03 | 安徽马钢自动化信息技术有限公司 | A kind of method for improving polishing machine HGC hydraulic cylinder roll-force control accuracies |
| TWI740494B (en) * | 2020-05-12 | 2021-09-21 | 中國鋼鐵股份有限公司 | Roll inspection method and roll inspection system |
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| JPH11267728A (en) * | 1998-03-24 | 1999-10-05 | Kawasaki Steel Corp | Crown control method |
| EP0985461A1 (en) * | 1998-02-27 | 2000-03-15 | Nippon Steel Corporation | Sheet rolling method and sheet rolling mill |
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| US3864955A (en) * | 1973-12-04 | 1975-02-11 | Blaw Knox Foundry Mill Machine | Rolling mill stand |
| DE3601239A1 (en) * | 1986-01-17 | 1987-07-23 | Schloemann Siemag Ag | Bending device for the axially displaceable working rolls of a four-high stand |
| JPS62142403U (en) * | 1986-02-28 | 1987-09-08 | ||
| JPS63199006A (en) * | 1987-02-12 | 1988-08-17 | Nippon Steel Corp | Work roll bending method for rolling mill |
| JPH02280910A (en) * | 1989-04-20 | 1990-11-16 | Kawasaki Steel Corp | Rolling machine |
| JP3167439B2 (en) | 1992-08-07 | 2001-05-21 | 川崎製鉄株式会社 | Endless rolling method |
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- 2011-01-12 BR BR112012024207A patent/BR112012024207A2/en not_active Application Discontinuation
- 2011-01-12 KR KR1020127024998A patent/KR101300237B1/en active IP Right Grant
- 2011-01-12 WO PCT/JP2011/050785 patent/WO2011122070A1/en active Application Filing
- 2011-01-12 EP EP11762311.6A patent/EP2554284B1/en active Active
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| US4803865A (en) * | 1987-07-17 | 1989-02-14 | SMS Schloemann--Siemag Aktiengesellschaft | Stand-supported bending device for axially slidable rolls of a multiroll rolling mill |
| EP0985461A1 (en) * | 1998-02-27 | 2000-03-15 | Nippon Steel Corporation | Sheet rolling method and sheet rolling mill |
| JPH11267728A (en) * | 1998-03-24 | 1999-10-05 | Kawasaki Steel Corp | Crown control method |
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| TW200944304A (en) * | 2008-03-04 | 2009-11-01 | Nippon Steel Corp | Plate rolling mill and plate rolling method |
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| EP2554284A1 (en) | 2013-02-06 |
| CN102834192B (en) | 2013-11-27 |
| WO2011122070A1 (en) | 2011-10-06 |
| KR101300237B1 (en) | 2013-08-26 |
| EP2554284A4 (en) | 2013-12-04 |
| EP2554284B1 (en) | 2014-11-19 |
| CN102834192A (en) | 2012-12-19 |
| BR112012024207A2 (en) | 2016-07-05 |
| TW201139001A (en) | 2011-11-16 |
| KR20120127511A (en) | 2012-11-21 |
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