JP2007144492A - Device and method for controlling shape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform high-accuracy shape control by shifting first intermediate rolls to proper positions and adding allowance to the deflection of AS-U rolls without being depended on frictional resistance even when rolling speed is slow. <P>SOLUTION: A shape controlling device 2 performs the shape control of a material 15 to be rolled while controlling the deflection of the AS-U rolls 11 and the shifting positions of the first intermediate rolls 13 and controlling the pressing force to work rolls 14. At this time, the shifting position of the first intermediate roll is corrected on the basis of the actual results of the shape of the material to be rolled, the rolling speed, the deflection of the AS-U roll 11 and the shifting position of the first intermediate roll 13 with the position correcting device 3 for the first intermediate roll. In this way, the shape control can be performed because the the first intermediate roll 13 is in the proper position even when the deflection of the AS-U rolls 11 reaches a limited value. A past actual result data is held with the position setting device 4 of the first intermediate roll and the tapered position of the second intermediate rolls is set in a desired position on the basis of the actual data of rolling. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a shape control device and a shape control method for controlling the shape of a material to be rolled.

  As a rolling mill that controls the rolling of a metal material with high quality, a Sendemia rolling mill is widely known. Such a Sendemia rolling mill is suitable for cold rolling a thin plate, and various shape control methods have been proposed. For example, a neural network that obtains the amount of operation of the actuator based on the difference between the detected shape pattern and the target shape pattern and the similarity ratio of the reference shape pattern is provided, the shape is recognized by this neural network, and a predetermined control rule is used. By performing fuzzy control, the AS-U roll and the first intermediate roll are controlled to control the shape of the thin plate. When performing such shape control, it is necessary to set a control rule for performing shape operation on a certain shape pattern (see, for example, Patent Document 1).

Further, for a control method of a special shape pattern (for example, a steep shape pattern) that cannot be expressed by a control rule, an AS-U roll is obtained by obtaining a fuzzy amount for each steepness pattern and fuzzy inference estimated from the fuzzy amount. The amount of bending and the shift position of the first intermediate roll are determined, and desired shape control is performed (see, for example, Patent Document 2). Thus, the conventional Sendemia rolling mill performs appropriate control for correcting the actual shape of the thin plate by combining the bending amount of the AS-U roll and the shift position of the first intermediate roll, regardless of which control method is used. It is possible to manage the plate thickness and prevent the plate from wavy. In the AS-U roll, shape control is performed in the entire plate width direction of the thin plate, and in the first intermediate roll, shape control of only the plate end of the thin plate is performed.
Japanese Patent No. 2804161 (see pages 3 to 4 and FIGS. 1 to 5) Japanese Patent No. 2668845 (see paragraphs 0017 to 0022)

  As described above, the conventional Sendigia rolling mill including Patent Documents 1 and 2 uses the AS-U roll crown adjustment (that is, the adjustment of the deflection amount) and the first intermediate roll as an actuator for controlling the shape of the thin plate. It is necessary to use shift position control. However, since the shift position control by the first intermediate roll moves the first intermediate roll in the sheet width direction during the rolling of the thin sheet, the first intermediate roll may not be shifted when the rolling speed is slow. . In other words, when the rolling speed is low, the first intermediate roll also rotates at a low speed, and therefore the frictional resistance in the moving direction generated between the first intermediate roll and the work roll increases. Therefore, when the rolling speed is low, a large force is required when shifting the first intermediate roll in the sheet width direction. As a result, in a state where the first intermediate roll (second roll) is not shifted to an appropriate position, control is performed only by adjusting the crown of the AS-U roll (adjustment of the deflection amount), and the AS-U roll ( There is no allowance for the amount of bending of the first roll), and it becomes difficult to realize highly accurate shape control.

  The present invention has been made in view of the above problems, and provides a shape control device and a shape control method capable of suppressing the amount of bending of the first roll within an appropriate range even when the rolling speed is low. The purpose is to do.

  The shape control device of the present invention has been devised to achieve the above-described object, and is a first device that varies the amount of deflection to vary the pressing force to a plurality of rolls with the material to be rolled. A roll, a second roll that changes a position of a taper formed on the roll, and changes a pressing force to one or a plurality of rolls between the material to be rolled, a pressing force of at least the first roll, and A shape control device comprising a third roll for controlling the shape of the material to be rolled by the pressing force of the second roll, and realized by the pressing force of the first roll and the pressing force of the second roll. Based on the actual shape of the material to be rolled, the rolling speed, the deflection amount of the first roll, and the taper position of the second roll, the roll position correcting means for correcting the taper position of the second roll is adopted. ing.

  According to such a configuration, the amount of deflection of the first roll and the shift position of the second roll are obtained by forcibly shifting the second roll according to the amount of deflection of the first roll and the shape of the plate end. Can be in an appropriate relationship. As a result, even when the rolling speed is low, the amount of bending of the first roll is suppressed to an appropriate range, and the shape of the material to be rolled can be appropriately controlled.

  Further, when the shape control device performs shape control of the material to be rolled by controlling the deflection amount of the first roll and the taper position of the second roll, the deflection amount of the first roll reaches the limit value. Also, the second roll can be complemented by forcibly changing the taper position. Moreover, even when the rolling speed is low and the second roll is difficult to shift, if the bending amount of the first roll is insufficient, the second roll can be used when the second roll has a shiftable rolling speed. Is shifted to a desired position to compensate for the shortage of the deflection amount of the first roll. As a result, the shape control device can realize a good shape in the entire speed region.

  ADVANTAGE OF THE INVENTION According to this invention, even when rolling speed is slow, the shape control apparatus and shape control method which can suppress the bending amount of a 1st roll to an appropriate range can be provided.

<< Summary of Invention >>
Hereinafter, a shape control apparatus according to the best mode for carrying out the present invention (hereinafter referred to as “embodiment”) will be described with reference to the drawings, taking a Sendemia rolling mill as a suitable example. The sendmir rolling mill according to the present invention is provided with a limiter in advance with a margin for the amount of bending of the AS-U roll. When the amount of deflection reaches the limiter, the shift position of the first intermediate roll is corrected according to the target shape during high-speed rolling. As a result, the shift position of the first intermediate roll can be moved to an appropriate (optimal) position while allowing a sufficient amount of bending of the AS-U roll, so that a shape capable of highly accurate shape control can be achieved. A control device can be realized. In addition, by correcting the shift position of the first intermediate roll in advance according to the type of rolling material and rolling schedule, the shift position of the first intermediate roll is set to an appropriate position for each type of rolling material and rolling schedule. Can be shifted in a short time.

<Background of the invention>
Hereinafter, an embodiment of a Sendemia rolling mill according to the present invention will be described in detail with reference to the drawings. First, an outline of a Sendemia rolling mill will be described for easy understanding.

  FIG. 3 is a conceptual configuration diagram of a general Sendemia rolling mill, in which (a) shows a side view and (b) shows a front view. As shown in FIG. 3, the Sendemia rolling mill 1 is a first intermediate composed of a total of four work rolls 14, each having a pair of work rolls 14 on both sides in the thickness direction with respect to a planar material 15 to be rolled. The roll 13 is composed of 20 rolls, that is, a second intermediate roll 12 composed of a total of 6 pieces each having three upper and lower portions, and a backup roll 16 comprising a total of eight pieces each comprising four upper and lower portions. Of the backup rolls 16, two or four at the top (two at the top in FIG. 3A) are called AS-U rolls 11. As shown in FIG. 3B, the AS-U roll 11 has a configuration in which a saddle 18 as an actuator is inserted between the divided rolls 17. Since it is such a structure, the AS-U roll 11 is provided with a plurality of rolls (second intermediate roll, first intermediate roll 13, work roll 14) between the material to be rolled 15.

  By configuring the Sendemia rolling mill 1 as shown in FIG. 3, loads from other stages of rolls are concentrated on the work roll 14 having a small diameter, so that the pair of work rolls 14 is made of a hard material such as stainless steel. The metal workpiece 15 can be effectively rolled. For example, since a concentrated load of 600 tons is applied to the work roll 14 from the AS-U roll 11, the second intermediate roll 12, and the first intermediate roll 13, a metal material of 5.0 mm is 0.5 mm by rolling control 10 times. Or it can roll to about 0.3 mm. In addition, since the rolling mill of such a structure is comprised by the roll of 20 steps | paragraphs, it is also called a 20-stage sendemia rolling mill, and is used favorably for the cold rolling etc. of a metal plate.

  The rolls for which shape control is performed in the Sendimi mill 1 are the AS-U roll 11 and the first intermediate roll 13. Therefore, the shape control method performed by the AS-U roll 11 and the first intermediate roll 13 will be described. 4A and 4B are conceptual diagrams showing a shape control method of the Sendemia rolling mill. FIG. 4A shows a shape control method of the AS-U roll, and FIG. 4B shows a shape control method of the first intermediate roll.

  As shown to the left figure of Fig.4 (a), in the state which does not bend AS-U roll 11, the elongation rate of the to-be-rolled material 15 becomes substantially uniform throughout the width direction like the characteristic view below the figure. ing. However, as shown in the right diagram of FIG. 4A, the deflection of the AS-U roll 11 can be changed by adjusting the position of the saddle 18. By bending the AS-U roll 11 in this way, the overall shape of the material 15 to be rolled can be controlled. For example, as shown to the right figure of Fig.4 (a), AS-U roll 11 is largely bent in the center part, and the roll gap of the work roll 14 becomes small in the sheet width direction center part of the to-be-rolled material 15. In addition, when the AS-U roll 11 is operated, as shown in the characteristic diagram at the bottom of the figure, it is possible to obtain a thin plate in a middle elongation state in which the elongation ratio at the center portion in the plate width direction of the material 15 is increased.

  On the other hand, since the first intermediate roll 13 is tapered on one side in the sheet width direction of the material to be rolled 15, the first intermediate roll 13 is shifted in the sheet width direction of the material to be rolled 15 with respect to the material to be rolled 15. By changing the taper position of the first intermediate roll 13, the shape of the plate end portion of the material to be rolled 15 can be changed.

  That is, as shown in the left diagram of FIG. 4 (b), in the state where the first intermediate roll 13 is not shifted, as shown in the characteristic diagram at the bottom of the same figure, the elongation ratio of the whole area of the rolled material 15 in the sheet width direction is It is almost uniform. However, as shown in the right diagram of FIG. 4B, when the first intermediate roll 13 that is tapered on the right side in the plate width direction is shifted to the outside (right side), as shown in the characteristic diagram below the same diagram. In addition, only the shape of the plate end on the right side in the plate width direction of the material to be rolled 15 is in an extended state (that is, a state in which the elongation rate is large).

  In this way, the shape of the plate edge can be controlled by shifting the first intermediate roll 13. The first intermediate roll 13 generally has a mechanical configuration in which the upper two pieces and the lower two pieces can be moved independently with the material to be rolled 15 in between, so that the roll taper is also The upper and lower rolls are provided on opposite sides in the plate width direction. For example, if the upper first intermediate roll 13 has a taper cut to the right in the plate width direction with the rolled material 15 in between, the lower first intermediate roll 13 has a taper in the plate width direction on the left with the rolled material 15 in between. It is.

  As described above, the Sendemia rolling mill 1 uses the two sets of actuators of the AS-U roll 11 and the first intermediate roll 13 to adjust the crown of the AS-U roll 11 (that is, to adjust the deflection amount). Shift position control of the first intermediate roll 13 is performed. At this time, the shift position control by the first intermediate roll moves the first intermediate roll in the sheet width direction during the rolling of the thin plate, so if the rolling speed is low, the first intermediate roll also rotates at a low speed. 1 The frictional resistance in the moving direction generated between the intermediate roll and the work roll is increased. Therefore, when the rolling speed is low, a large force is required to shift the first intermediate roll in the sheet width direction. Therefore, it becomes difficult to realize highly accurate shape control.

  FIG. 5 is a conceptual diagram of a shape control method showing a rolling speed and a shape control range of two actuators by a Sendemia rolling mill. That is, as shown in FIG. 5, when the Sendemia mill is operating at a low speed (for example, 0 to 100 mpm), the shape control is performed only by adjusting the crown of the AS-U roll 11, and the Sendemia mill is operated at a high speed ( For example, when operating at 100 to 600 mpm), the first intermediate roll 13 is operable, and shape control is performed using crown adjustment of the AS-U roll 11 and shift position control of the first intermediate roll 13. ing.

  In other words, when the Sendemia rolling mill is operating at a low speed, the plate shape is corrected only by adjusting the crown of the AS-U roll 11 (adjusting the amount of deflection) while the shift position of the first intermediate roll 13 is not in an appropriate position. Therefore, the limit value (for example, 1 mm) of the bending amount of the AS-U roll 11 may be exceeded. As a result, the safety control means of the Sendemia rolling mill is activated, and a situation in which the control operation of the AS-U roll 11 is stopped occurs.

  Therefore, after the shift of the first intermediate roll 13 becomes a speed state that can be used in the shape control, the Sendemia rolling mill monitors the actual shape and the actual value of the bending amount of the AS-U roll 11 to determine the first. The shift position of the first intermediate roll 13 is forcibly changed until the shift position of the intermediate roll 13 becomes an appropriate position. Further, the Sendemia rolling mill uses the crown adjustment (adjustment of deflection amount) of the AS-U roll 11 in order to keep the shape of the material to be rolled 15 forcibly changing the shift position of the first intermediate roll 13 in an appropriate state. Change the target shape level for the shape control. Furthermore, the Sendemia rolling mill stores the shift position at which the shift position of the first intermediate roll 13 is appropriate for each rolling schedule or rolling material so that the tip of the first intermediate roll 13 is at the appropriate position. The shift position of the first intermediate roll 13 is set in advance. In this way, by appropriately shifting the first intermediate roll 13 to an appropriate position, it is possible to perform appropriate shape control while preventing the bending amount of the AS-U roll 11 from exceeding a limit value (limit). it can.

<< First Embodiment >>
Next, a specific shape control method of a Sendemia rolling mill (a shape control device described in claims) according to an embodiment of the present invention will be described in detail. FIG. 1 is a configuration diagram showing a Sendemia rolling mill. As shown in FIG. 1, the Sendemia rolling mill 1 is controlled by an AS-U roll (first roll) 11 and a first intermediate roll (second roll) 13 via a work roll (third roll) 14. The shape control device 2 that transmits the shape control signal to the rolling mechanism unit that controls the shape of the material 15 to be rolled, and the AS-U roll 11 and the first intermediate roll 13 (different from the shape control device described in the claims). The first intermediate roll position correction device (roll position correction means) 3 for transmitting a correction signal for correcting the first intermediate roll 13 to an appropriate position, and the first intermediate roll 13 are set to an appropriate position in advance. A first intermediate roll position setting device (roll position setting means) 4 for transmitting a setting signal for detecting the actual shape of the material 15 to be rolled, a shape result value S11 and a shape target value S12. Deviation S13 It has a target shape setter 6 for obtaining a structure having a.

  Further, the shape control device 2 includes an AS-U roll shape control unit 21 that performs crown adjustment (deflection amount adjustment) of the AS-U roll 11 and a first intermediate roll shift shape that performs shift position control of the first intermediate roll 13. The configuration includes a control unit 22.

  Further, the input signal to the shape control device 2 is determined by the actual shape value S11 measured by the shape detector 5 installed on the outlet side of the Sendemia rolling mill 1 and each pass schedule set by the target shape setting device 6. It becomes a deviation S13 from the shape target value S12. Therefore, the AS-U roll shape control unit 21 and the first intermediate roll shift shape control unit 22 perform feedback control so that the deviation S13 between the actual shape value S11 and the target shape value S12 is minimized.

  Here, a specific example of feedback control that minimizes the deviation S13 between the actual shape value S11 and the target shape value S12 will be described with reference to the drawings. FIG. 6 is a conceptual diagram showing an example of the shape control method of the Sendemia rolling mill, where (a) is a configuration and characteristic diagram in a state where there is a shape deviation, and (b) is a shape formed by the first intermediate roll shift shape control unit 22. The configuration and characteristic diagram in a state in which the deviation is controlled to the minimum are shown, and (c) shows the configuration and characteristic diagram in a state in which the shape deviation is controlled to the minimum by the AS-U roll shape control unit 21.

  For example, as shown in FIG. 6 (a), when the AS-U roll 11 is not bent and the first intermediate roll 13 is not shifted, the entire sheet width direction is covered as shown in the right characteristic diagram. A large shape deviation has occurred. At this time, as shown in FIG. 6B, the first intermediate roll shift shape control unit 22 attempts to remove the shape deviation by moving the shift position of the upper and lower intermediate rolls 13 outward as indicated by arrows. As a result, the shape deviation is controlled to the minimum over the entire plate width direction as shown in the characteristic diagram on the right. Further, the AS-U roll shape control unit 21 attempts to remove the shape deviation by changing the deflection amount of the AS-U roll, as shown in FIG. As a result, the shape deviation is controlled to the minimum over the entire plate width direction as shown in the characteristic diagram on the right.

  However, as described above, the moving speed at which the first intermediate roll 13 shifts is slower than the bending speed of the AS-U roll 11, and the range of the control effect of the first intermediate roll 13 is limited to the plate end. Therefore, it is necessary to control the bending amount of the AS-U roll 11 using the AS-U roll shape control unit 21 as much as possible. Further, as shown in FIG. 5, the Sendemia rolling mill 1 is operated with a speed pattern in which the mill is stopped after being changed from low speed → high speed → low speed, so that the speed at the start of rolling or just before the end of rolling is low. In the speed region, the control of the first intermediate roll 13 by the first intermediate roll shift shape control unit 22 is not effective. Therefore, in the speed region where the speed is low, the shape control is performed only by controlling the bending amount of the AS-U roll 11 by the AS-U roll shape control unit 21.

  As a result, in the control of the bending amount of the AS-U roll 11 by the AS-U roll shape control unit 21, the bending amount of the AS-U roll 11 increases as shown in the configuration diagram of FIG. There are cases where the margin of the amount is lost or the limit value of the deflection amount is reached. That is, the AS-U roll 11 performs a bending operation of a certain value or more (for example, 1 mm) because a mechanical deviation limit is provided between the saddles 18 so that the roll shaft is not broken by the bending. I can't do that.

  For example, as shown in the configuration diagram of FIG. 6C, the bending amount of the AS-U roll 11 is large, and the bending deviation between the saddles 18 of the AS-U roll 11 reaches the limit value. In this case, when the shape of the material to be rolled 15 is suddenly changed, the first intermediate roll shift shape control unit 22 tries to control the shift position of the first intermediate roll 13, so that the responsiveness of the shape control is deteriorated. In addition, when the rolling speed is low, the shift control of the first intermediate roll 13 by the first intermediate roll shift shape control unit 22 is not effective, and as a result, the desired shape control may not be performed.

  Therefore, when the bending amount of the AS-U roll 11 reaches a limit value (limit) as shown in the configuration diagram of FIG. 6C, the first intermediate roll 13 is increased after the rolling speed is increased. The first intermediate roll shift shape control unit 22 controls the shift position of the first intermediate roll 13 so as to change the shift position to a desired position. As shown in the characteristic diagram of FIG. A means for controlling the first intermediate roll 13 is required so that the shape deviation is minimized within a range where the deflection amount of the roll 11 does not exceed the limit value (limit).

  Returning to FIG. 1 again, the first intermediate roll position correction device 3 corrects the shift position of the first intermediate roll 13 when the deflection amount of the AS-U roll 11 reaches the limit value (limit), and the shape deviation is corrected. This is means for controlling the first intermediate roll 13 so as to be minimized. This first intermediate roll position correction device 3 has a rolling record S14 such as the deviation S13 between the actual shape value S11 and the target shape value S12, the deflection amount of the AS-U roll 11, the shift position of the first intermediate roll 13, and the rolling speed. , The first intermediate roll shift command S15, the AS-U roll position command S16, the first intermediate roll shift command S15 so that the shift position of the first intermediate roll 13 becomes an appropriate position while maintaining the actual shape at the target shape. The target shape correction value S18 to the intermediate roll shift shape control unit 22 and the target shape correction value S17 to the AS-U roll shape control unit 21 are output.

  The operation of the first intermediate roll position correction device 3 will be described in more detail. FIG. 2 is a diagram showing an internal configuration of the first intermediate roll position correcting device 3 in the Sendemia rolling mill of FIG. As shown in FIG. 2, the first intermediate roll position correction device 3 includes a first intermediate roll position quality determination unit (roll position quality determination unit) 30, an AS-U roll target shape correction unit (first roll target shape correction). Part) 31, a first intermediate roll target shape correction part (second roll target shape correction part) 32, a first intermediate roll shift position correction part (second roll position correction part) 33, and an AS-U roll position correction. It is the structure provided with the part (1st roll position correction part) 34. FIG.

  The first intermediate roll position quality determination unit 30 determines whether the shift position of the first intermediate roll 13 is an appropriate position using the deviation S13 between the actual shape value S11 and the target shape value S12 and the actual rolling value S14. To do. The determination is performed using, for example, a rule base. As the rule base, for example, “the position of the saddle 18 at the end of the AS-U roll 11 exceeds the operation limit in the closing direction, the taper position of the first intermediate roll 13 is within the plate width, and If the end of the actual shape plate matches the target shape, it is necessary to change the shift position of the first intermediate roll 13 ”.

  If the first intermediate roll position pass / fail determination unit 30 determines that the shift position of the first intermediate roll 13 needs to be changed, the first intermediate roll shift position correction unit 33 sends the first intermediate roll shift command S15 to the first intermediate roll shift command S15. The shift position of the first intermediate roll 13 is corrected to a ramp shape by being superimposed on the output signal of the intermediate roll shift shape control unit 22. At this time, when the rule base operates, the shift position of the first intermediate roll 13 is shifted outward to extend the shape of the plate end. As a result, since the shape changes to the plate end portion elongation, the AS-U roll 11 operates according to the control of the AS-U roll shape control unit 21 accordingly, and as a result, the most end in the AS-U roll 11 The position of the saddle 18 moves away from the closing direction operation limit and moves to the safe side.

  Further, if the shift of the first intermediate roll 13 is shifted to the outside, it is possible to predict that the plate end shape will change. Therefore, the AS-U roll is not required without waiting for the operation of the AS-U roll shape control unit 21. The position correcting unit 34 may perform crown adjustment (deflection amount adjustment) of the AS-U roll 11 by superimposing the AS-U roll position command S <b> 16 on the output signal of the AS-U roll shape control unit 21.

  Returning to FIG. 1 again, if it is desired to change the shift position of the first intermediate roll 13 while keeping the actual shape within a certain deviation, the AS-U roll shape control unit 21 and the first intermediate roll shift shape control unit This can be realized by changing the deviation S13 of the target shape input to the control unit 22. For example, if it is determined that the shift position of the first intermediate roll 13 needs to be changed based on the rule base, the first intermediate roll is set to the target shape deviation S13 that is input to the first intermediate roll shift shape control unit 22. The target shape correction value S18 output from the target shape correction unit 32 is superimposed, and the target shape deviation S13 input to the first intermediate roll shift shape control unit 22 is changed. Accordingly, the first intermediate roll shift shape control unit 22 shifts the first intermediate roll 13 to the outside, and the shape is changed to the state of the ear extension at the plate end. The change amount of the target shape is set within the allowable value of the shape deviation.

  Similarly, the target shape correction value S17 output from the AS-U roll target shape correcting unit 31 is superimposed on the deviation S13 of the target shape input to the AS-U roll shape control unit 21, and the AS-U roll shape control unit. The deviation S13 of the target shape to be input to 21 is changed. Thereby, the AS-U roll shape control part 21 controls the AS-U roll 11 and corrects it in the direction of extending at the plate end.

  Moreover, if setting S19 from the 1st intermediate roll position setting apparatus 4 is input with respect to the output signal of the 1st intermediate roll shift shape control part 22, the 1st intermediate roll 13 will be shifted to the predetermined position in advance. I can leave. For example, the first intermediate roll position setting device 4 learns the plate thickness, steel type, and the like in a table divided for each number of passes. At the start of rolling, the shift position of the first intermediate roll 13 is selected from the table based on the rolling schedule, and the first intermediate roll 13 is shifted to a desired position in advance by setting S19 from the first intermediate roll position setting device 4. Thus, the position correction time by the first intermediate roll position correction device 3 can be minimized.

<< Second Embodiment >>
In the first embodiment, a Sendemia rolling mill has been described. In the present embodiment, a six-high rolling mill configured by six rolls in the vertical direction will be described.
FIG. 7 is a configuration diagram of a six-high rolling mill. The six-high rolling mill 50 according to the second embodiment includes an upper work roll 55, a lower work roll 56, an upper intermediate roll 53, a lower intermediate roll 54, an upper backup roll 51, and a lower backup roll 52 across the material 15 to be rolled. It is composed of 6 rolls.

  Each of the upper intermediate roll 53 and the lower intermediate roll 54 has a taper at the end opposite to the plate width direction, and can be shifted in the axial direction as indicated by an arrow in FIG. The upper and lower intermediate rolls 53 and 54 can control the shape of the plate end portion of the material 15 to be rolled, in particular, like the first intermediate roll 13 in the Sendemia rolling mill 1 shown in FIG. A work roll bender 57 is installed at the ends of the upper work roll 55 and the lower work roll 56. The work roll bender 57 changes the plate shape of the material to be rolled 15 while changing the rolling pressure applied to the material to be rolled 15 by bending the roll in the same manner as the AS-U roll 11 of the Sendemia mill 1 shown in FIG. Bending can be controlled.

  Also in the 6-high rolling mill 50 of FIG. 7, the upper and lower intermediate rolls 53 and 54 are shifted in the sheet width direction when the rolling speed is low, similarly to the first intermediate roll 13 in the Sendemia rolling mill 1 shown in FIG. Have problems that can not. For this reason, when the rolling speed is low, only the work roll bender 57 is operated to control the shape, so that the shift positions of the upper and lower intermediate rolls 53 and 54 may not be in an appropriate state. Therefore, the shift position of the upper and lower intermediate rolls 53 and 54 can be controlled to an appropriate position with the same configuration as that of the Sendemia rolling mill 1 of FIG. 1 in the first embodiment.

  FIG. 8 is a configuration diagram of a six-high rolling mill according to the second embodiment. As shown in FIG. 8, the six-high rolling mill 50, which is a shape control device, includes a shape control device 61, an intermediate roll position correction device 62, an intermediate roll position setting device 63, and a shape detector 5 on the six rolls described above. , And a target shape setting device 6.

  The shape control device 61 includes an intermediate roll shift shape control unit 61a and a work roll bender shape control unit 61b. Further, an intermediate roll position correction device 62 is added, and processing such as target shape correction, intermediate roll shift, and AS-U roll position command is performed in the same manner as the first intermediate roll position correction device 3 shown in FIG. can do. Further, by adding an intermediate roll position setting device 63 that performs the same control process as the first intermediate roll position setting device 4 shown in FIG. 1, the intermediate roll position is desired in advance according to the type of material to be rolled. It can also be set to the position. As described above, the present invention can be applied to a six-high rolling mill as in the case of a Sendemia rolling mill.

<Summary>
Summarizing the above, the Sendemia rolling mill 1 according to an embodiment of the present invention includes a crown adjusting mechanism for the AS-U roll 11, a shift mechanism for the first intermediate roll 13, and a shape detector 5. And when shape control is implemented in the Sendemia rolling mill 1, the shift position of the first intermediate roll 13 is corrected by determining whether the shift position of the first intermediate roll 13 is good or bad. At this time, the quality determination of the shift position of the first intermediate roll 13 is performed using the actual shape, the bending amount of the AS-U roll 11, and the shift position of the first intermediate roll 13. Thereby, even if the first intermediate roll 13 cannot perform the shift operation at the time of the low speed rolling, the shift position of the first intermediate roll 13 at the timing at the time of the high speed rolling while looking at the bending amount and the actual shape of the AS-U roll 11. Is corrected to an appropriate position. Therefore, even if the shape control by the shape control device such as the Sendemia mill 1 is performed by the crown adjustment (adjustment of the deflection amount) of the AS-U roll 11 and the shift position control of the intermediate roll, both the rolls are always moved. Good shape control can be performed in the entire speed region while maintaining an appropriate position. The shift position of the first intermediate roll is corrected by directly changing the shift position of the first intermediate roll.

  The correction of the shift position of the first intermediate roll is realized by correcting the target shape for each of the shape control using the crown adjustment of the AS-U roll and the shape control using the shift of the first intermediate roll. Yes. Furthermore, the data of the shift position of the first intermediate roll after correction is stored, and when performing the same rolling next time, the shape is obtained by setting the shift position of the first intermediate roll in advance based on the data. Control time can be shortened.

  The shape control device of the present invention can be effectively used in a Sendia mill or a six-high mill that performs a rolling process on a metal material.

It is a block diagram which shows the shape control system of the Sendemia rolling mill which concerns on 1st Embodiment of this invention. It is a figure which shows the internal structure of the 1st intermediate | middle roll position correction apparatus 3 in the shape control system of the Sendemia rolling mill of FIG. It is a notional block diagram of a general Sendemia rolling mill, (a) shows a side view, (b) shows a front view. It is a conceptual diagram which shows the shape control method of a Sendemia rolling mill, (a) shows the shape control method of an AS-U roll, (b) shows the shape control method of a 1st intermediate roll. It is a conceptual diagram of the shape control method which shows the rolling speed by a Sendemia mill, and the shape control range of two actuators. It is a conceptual diagram which shows an example of the shape control method of a Sendemia rolling mill, (a) is a structure and characteristic diagram in a state with a shape deviation, (b) is the shape deviation minimized by the 1st intermediate | middle roll shift shape control part 22. Configuration and characteristic diagram in the controlled state, (c) shows the configuration and characteristic diagram in the state in which the shape deviation is controlled to the minimum by the AS-U roll shape control unit 21. It is a block diagram of the 6-high rolling mill which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the shape control system of the 6-high rolling mill which concerns on 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sendemia rolling mill 2 Shape control apparatus 3 1st intermediate roll position correction apparatus (roll position correction means)
4 first intermediate roll position setting device (roll position setting means)
5 Shape detector 6 Target shape setter 11 AS-U roll (first roll)
12 Second intermediate roll 13 First intermediate roll (second roll)
14 Work roll (third roll)
DESCRIPTION OF SYMBOLS 15 Rolled material 16 Backup roll 17 Split roll 18 Saddle 21 AS-U roll shape control part 22 1st intermediate roll shift shape control part 30 1st intermediate roll position quality determination part (roll position quality determination part)
31 AS-U roll target shape correction unit (first roll target shape correction unit)
32 1st intermediate roll target shape correction part (2nd roll target shape correction hand part)
33 1st intermediate roll shift position correction part (2nd roll position correction part)
34 AS-U roll position correction section (first roll position correction section)
50 6-high rolling mill 51 Upper backup roll 52 Lower backup roll 53 Upper intermediate roll 54 Lower intermediate roll 55 Upper work roll 56 Lower work roll 61 Shape control device 61a Intermediate roll shift shape control unit 61b Work roll bender shape control unit 62 Intermediate roll Position correction device 63 Intermediate roll position setting device

Claims (10)

By changing the amount of bending and changing the pressing force to the plurality of rolls between the rolled material and the position of the taper formed on the first roll, A second roll for varying the pressing force to the one or a plurality of rolls, and a third roll for controlling the shape of the material to be rolled by at least the pressing force of the first roll and the pressing force of the second roll A shape control device comprising:
The actual result of the shape of the material to be rolled realized by the pressing force of the first roll and the pressing force of the second roll, the rolling speed, the amount of bending of the first roll, and the second roll A shape control device comprising roll position correction means for correcting the taper position of the second roll based on the taper position.   The roll position correction means includes a roll position quality determination unit that determines whether or not the taper position of the second roll is appropriate based on the shape record, the rolling speed, the deflection amount, and the taper position. The shape control apparatus according to claim 1. The roll position correcting means further includes:
When the roll position quality determination unit determines that the taper position of the second roll is not appropriate, a second taper position of the second roll is corrected based on a deviation between the actual shape and the target shape. The shape control apparatus according to claim 2, further comprising a roll position correction unit. The roll position correcting means further includes:
When the second roll position correcting unit corrects the taper position of the second roll, a first amount of correction of the first roll is corrected based on a deviation between the actual shape and the target shape. The shape control apparatus according to claim 3, further comprising a roll position correction unit. The roll position correcting means further includes:
The shape control apparatus according to claim 4, further comprising a second roll target shape correcting unit that changes the taper position of the second roll by changing the value of the shape target. The roll position correcting means further includes:
When the second roll target shape correcting unit corrects the taper position of the second roll, the first roll target shape that corrects the deflection amount of the first roll by changing the value of the shape target. The shape control apparatus according to claim 5, further comprising a correction unit.   Furthermore, it has a roll position setting means which hold | maintains the rolling performance data of the said to-be-rolled material, and sets the taper position of a said 2nd roll to a desired position based on this rolling performance data. The shape control device according to any one of claims 6 to 6.   The shape control device according to any one of claims 1 to 7, wherein the shape control device is used as a Sendemia mill. By changing the amount of bending and changing the pressing force to the plurality of rolls between the rolled material and the position of the taper formed on the first roll, A second roll for varying the pressing force to the one or a plurality of rolls, and a third roll for controlling the shape of the material to be rolled by at least the pressing force of the first roll and the pressing force of the second roll A shape control method executed by a shape control device comprising:
The actual result of the shape of the material to be rolled realized by the pressing force of the first roll and the pressing force of the second roll, the rolling speed, the amount of bending of the first roll, and the second roll Determining whether the taper position of the second roll is appropriate based on the taper position;
When it is determined that the taper position of the second roll is not appropriate, correcting the taper position of the second roll based on a deviation between the actual shape and the target shape;
When the taper position of the second roll is corrected, correcting the deflection amount of the first roll based on the deviation between the actual shape and the target shape;
The shape control method characterized by including. Modifying the shape target value to correct the taper position of the second roll;
When the taper position of the second roll is corrected, changing the value of the shape target to correct the amount of deflection of the first roll; and
The shape control method according to claim 9, further comprising:

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