KR20070057017A - Form control device and form control method - Google Patents

Abstract

A shape control system and a shape control method are provided to perform shape control at high accuracy by shifting first intermediate rolls to proper positions without depending on friction resistance even in case of slow rolling speed, thereby allowing deflection of AS-U rolls to have a margin. A shape control system(1) comprises first rolls(11) for varying pressing forces onto a plurality of rolls between rolling workpieces by varying the deflection, second rolls(13) for varying pressing forces onto a single roll or a plurality of rolls between the rolling workpieces by varying the positions of tapers formed on the second rolls, and third rolls(14) for controlling the shape of the rolling workpieces at least by the pressing forces of the first rolls and the pressing forces of the second rolls, wherein the shape control system further comprises a roll position correcting part(3) for correcting taper positions of the second rolls based on actual shape results of the rolling workpieces realized by the pressing forces of the first rolls and the pressing forces of the second rolls, rolling speeds, deflections of the first rolls, and taper positions of the second rolls. The roll position correcting part comprises a roll position suitability determining part for determining whether taper positions of the second rolls are suitable or not based on the actual shape results, the rolling speeds, the deflections, and the taper positions.

Description

Shape control device and shape control method {FORM CONTROL DEVICE AND FORM CONTROL METHOD}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing a shape control system of a sensmere rolling machine according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an internal configuration of a first intermediate roll position correction device 3 in the shape control system of the sensemere rolling mill of FIG.

3 is a conceptual configuration diagram of a general sensimilar rolling mill, (a) is a side view, and (b) is a front view.

Fig. 4 is a conceptual diagram showing a shape control method of a sensmere rolling machine, (a) is a shape control method of an AS-U roll, and (b) is a view showing a shape control method of a first intermediate roll.

Fig. 5 is a conceptual diagram of a shape control method showing a rolling speed by a Sensimere rolling mill and a shape control range of two actuators.

Fig. 6 is a conceptual diagram showing an example of a shape control method of a sensmere rolling mill, (a) is a configuration and characteristic diagram in a state where there is a shape deviation, and (b) is a shape deviation by the first intermediate roll shift shape control unit 22. (C) is a figure which shows the structure and characteristic figure of the state which controlled the shape deviation to the minimum by the AS-U roll shape control part 21, and FIG.

7 is a configuration diagram of a six-stage rolling mill according to a second embodiment of the present invention.

8 is a block diagram showing a shape control system of a six-stage rolling mill according to a second embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: Sensmere rolling mill

2: shape control device

3: 1st intermediate roll position correction apparatus (roll position correction means)

4: 1st intermediate roll position setting device (roll position setting means)

5: shape detection unit

6: target shape setter

11: AS-U roll (first roll)

12: second intermediate roll

13: 1st intermediate roll (2nd roll)

14: work roll (third roll)

15: rolled material

16: backup roll

17: split roll

18: Saddle

21: AS-U roll shape control unit

22: first intermediate roll shift shape control unit

30: 1st intermediate roll position acceptance determination part (roll position acceptance 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 part)

33: 1st intermediate roll shift position correction part (2nd roll position correction part)

34: AS-U roll position correction (first roll position correction)

50: 6 speed rolling mill

51: upper backup roll

52: lower backup roll

53: upper middle roll

54: lower middle roll

55: upper work roll

56: lower work roll

61: shape control device

61a: middle roll shift shape control unit

61b: work roll bender shape control unit

62: middle roll position correction device

63: middle roll position setting device

[Document 1] Japanese Patent No. 2804161

[Document 2] Japanese Patent No. 2668845

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

SENDZIMIR rolling mills are widely known as rolling mills for rolling control of metal materials with high quality. Such a sensmere rolling mill is preferable for cold rolling a thin plate, and various shape control methods are proposed. For example, a neural network is provided which calculates an operation amount of an actuator based on a difference between the detected shape pattern and the target shape pattern and a similar ratio between the reference shape pattern, and the pattern is recognized by the neural network, and the predetermined control rule is provided. By performing the purge control using, the AS-U roll and the first intermediate roll are controlled to control the shape of the thin plate. In addition, when performing such shape control, it is necessary to set the control rule which performs shape manipulation with respect to a certain shape pattern (for example, refer patent document 1).

In addition, for the control method of the special shape pattern (for example, the steep shape pattern) which cannot be expressed by a control rule, the purge amount for every steepness pattern is calculated | required, and AS-U is estimated by the fuzzy inference estimated from the purge amount. The amount of warpage of the roll and the shift position of the first intermediate roll are determined, and desired shape control is performed (see Patent Document 2, for example). As described above, even in the case of using any of the control methods, the conventional sensmere rolling mill combines the deflection amount of the AS-U roll and the shift position of the first intermediate roll, and performs appropriate control for correcting the actual shape of the thin plate. Management and prevention of wave breaking of the board are realized. In the AS-U roll, shape control is performed in the entire plate width direction area of the thin plate, and shape control of only the judging portion of the thin plate is performed in the first intermediate roll.

[Patent Document 1] Japanese Patent No. 2804161 (see pages 3 to 4 and FIGS. 1 to 5)

[Patent Document 2] Japanese Patent No. 2668845 (see paragraphs 0017 to 0022)

As described above, the conventional Sensmere rolling mill incorporating Patent Literatures 1 and 2 is an actuator for controlling the shape of the thin plate, and the crown adjustment of the AS-U roll (that is, the adjustment of the deflection amount) and the shift position of the first intermediate roll You need to use the control. By the way, shift position control by a 1st intermediate | middle roll may not be able to shift a 1st intermediate | middle roll, when rolling speed is slow, in order to move a 1st intermediate | middle roll to a plate width direction during rolling of a thin plate. In other words, when the rolling speed is low, the first intermediate roll is also rotated at low speed, so that the frictional resistance in the moving direction generated between the first intermediate roll and the work roll increases. Therefore, when the rolling speed is slow, a large force is required when the first intermediate roll is shifted in the plate 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 the crown adjustment (adjustment of the amount of warpage) of the AS-U roll, and the amount of warpage of the AS-U roll (first roll) There is no room for this, and it becomes difficult to realize high-precision shape control.

This invention is made | formed in view of the above problem, and an object of this invention is to provide the shape control apparatus and shape control method which can suppress the curvature amount of a 1st roll in a suitable range, even when a rolling speed is slow.

The shape control apparatus of the present invention was devised to attain the above object. The shape control apparatus according to the present invention changes the position of the first roll which varies the amount of warpage to vary the pressing force to a plurality of rolls between the rolled material, and the position of the taper formed on the body. It is a shape control apparatus provided with the 2nd roll which changes the pressing force to single or multiple rolls between soft materials, and the 3rd roll which shape-controls the said to-be-rolled material by the pressing force of the 1st roll and the pressing force of a 2nd roll, Correcting the taper position of the second roll based on the shape performance of the rolled material, the rolling speed, the amount of warpage of the first roll, and the taper position of the second roll, realized by the pressing force of the first roll and the pressing force of the second roll. The structure provided with roll position correction means is used.

According to such a structure, the deflection amount of a 1st roll and the shift position of a 2nd roll can be made into an appropriate relationship by forcibly shifting a 2nd roll according to the deflection amount of a 1st roll and the shape of a board edge part. Thereby, even when a rolling speed is slow, the curvature amount of a 1st roll can be suppressed in an appropriate range, and it becomes possible to shape-control a rolled material appropriately.

In addition, when the shape control apparatus controls the shape of the rolled material by controlling the bending amount of the first roll and the shifting of the taper position of the second roll, even if the amount of warpage of the first roll reaches a limit value, the second roll maintains the tapered position. It can be compelled to change. Further, even when the second roll is difficult to shift at a low rolling speed, if the deflection amount of the first roll is insufficient, the second roll is shifted to a desired position when the second roll is at a rolling speed that can be shifted, and the deficiency of the deflection amount of the first roll is reduced. To complement. As a result, the shape control device can realize a good shape in the entire speed range.

EMBODIMENT OF THE INVENTION Hereinafter, the shape control apparatus which concerns on the best form (henceforth "embodiment" hereafter) for implementing this invention is demonstrated, referring a figure as a preferable example. The limiter rolling mill according to the present invention is provided with a limiter in advance in the amount of warpage of the AS-U roll. And when the amount of warpage reaches the limiter, the shift position of the first intermediate roll is corrected according to the target shape when the high-speed rolling is performed. Thereby, since the shift position of a 1st intermediate | middle roll can be moved to an appropriate position, having a margin to the curvature amount of an AS-U roll, the shape control apparatus which can perform high-precision shape control is realizable. In addition, by correcting the shift position of the first intermediate roll in advance according to the type of rolling material, rolling schedule, or the like, the shift position of the first intermediate roll can be shifted at an appropriate position for a short time for each type of rolling material or rolling schedule. Can be.

EMBODIMENT OF THE INVENTION Hereinafter, although the embodiment of the sensing mill rolling machine which concerns on this invention is described in detail using drawing, in order to understand easily, the outline | summary of the sensing steel mill is demonstrated first.

3 is a conceptual configuration diagram of a general sensimilar rolling mill, (a) is a side view, and (b) is a front view. As shown in Fig. 3, the sensimilar rolling mill 1 is composed of two sets of work rolls 14 and a total of four pieces of two top and bottom, respectively, on both sides in the thickness direction with respect to the planar to-be-rolled material 15. It consists of 20 rolls of the roll 13, the 2nd intermediate | middle roll 12 which consists of a total of three pieces of three top and bottom, and the backup roll 16 which consists of eight pieces of a total of four pieces of top and bottom. In the backup roll 16, two or four at the top (two at the top in Fig. 3A) are referred to as an AS-U roll 11. As shown in Fig. 3B, the AS-U roll 11 has a configuration in which saddles 18, which are actuators, are inserted between the divided rolls 17. As shown in Figs. With such a configuration, the AS-U roll 11 is provided with a plurality of rolls (second intermediate roll, first intermediate roll 13, work roll 14) between the rolled materials 15.

By setting the sensimilar rolling mill 1 in the configuration as shown in Fig. 3, since the load from the rolls of different stages is intensively applied to the detailed work roll 14 of diameter, stainless steel or the like is performed by the pair of work rolls 14. The rolled material 15 of hard metal can be rolled effectively. For example, since 600 tons of concentrated load is applied to the work roll 14 from the AS-U roll 11, the second intermediate roll 12, and the first intermediate roll 13, it is 5.0 by 10 rolling controls. The metal material of mm can be rolled to about 0.5 mm or 0.3 mm. Moreover, since the rolling mill of such a structure is comprised by the 20-stage roll, it is also called a 20-stage sensimilar rolling mill, and is used preferably for cold rolling of a metal plate.

The roll which performs shape control in the sensmere rolling mill 1 is the AS-U roll 11 and the 1st intermediate roll 13. Therefore, the method of shape control performed by the AS-U roll 11 and the 1st intermediate roll 13 is demonstrated. Fig. 4 is a conceptual diagram showing the shape control method of the sensmere rolling machine, (a) shows the shape control method for the AS-U roll, and (b) shows the shape control method for the first intermediate roll.

By bending the AS-U roll 11 as shown in the left figure of Fig. 4A, the elongation of the rolled material 15 is substantially uniform in the entire width direction region as shown in the characteristic diagram under the above drawing. However, by adjusting the position of the saddle 18 as shown in the right figure of Fig. 4A, the warpage of the AS-U roll 11 can be changed. By bending the AS-U roll 11 in this way, the shape of the whole plate width direction of the to-be-rolled material 15 can be controlled. For example, as shown in the right drawing of Fig. 4A, the AS-U roll 11 is largely bent at the center portion, and the work roll 14 is moved at the center portion in the plate width direction of the rolled material 15. Since the roll gap becomes small, when the AS-U roll 11 is operated, as shown in the characteristic diagram below, the elongation of the thin sheet in the stretched state can be obtained while the elongation of the center portion in the width direction of the rolled material 15 increases. have.

On the other hand, since the taper is formed in one plate width direction of the to-be-rolled material 15 in the 1st intermediate roll 13, the 1st intermediate roll 13 is shifted to the board width direction of the to-be-rolled material 15, and the rolled material ( By changing the taper position of the 1st intermediate roll 13 with respect to 15), the shape of the judgment part of the to-be-rolled material 15 can be changed.

That is, as shown in the left figure of Fig. 4B, in the state in which the first intermediate roll 13 is not shifted, the plate width direction of the rolled material 15 as shown in the characteristic drawing under the above drawing is shown. The elongation rate of the entire region is almost uniform. However, as shown in the right figure of Fig. 4B, when the first intermediate roll 13, in which the taper is cut off, is shifted outward (right) as shown in the right side of the plate width direction, As shown, only the shape of the judgment part on the right side of the plate width direction of the to-be-rolled material 15 is extended (that is, a state where the elongation rate is large).

In this way, the shape control of the judgment part can be performed by shifting the first intermediate roll 13. In addition, since the first intermediate roll 13 is generally a mechanical configuration capable of moving independently of the rolled material 15 by setting the upper two and the lower two, the roll taper is also used at the upper and lower rolls. It is provided in the plate width direction opposite side, respectively. For example, if the taper is cut | disconnected in the plate width direction right side of the upper 1st intermediate | middle roll 13 by sandwiching the rolling material 15, the lower 1st intermediate | middle roll 13 of the lower side will sandwich a rolling material 15 The taper is cut | disconnected on the left side of the width direction.

As described above, the Sensimere rolling mill 1 uses the actuator of the AS-U roll 11 and the first intermediate roll 13 set of 2 to adjust the crown of the AS-U roll 11 (that is, the amount of warpage). Adjustment) and the shift position control of the 1st intermediate | middle roll 13 are performed. At this time, in the shift position control by the first intermediate roll, in order to move the first intermediate roll in the plate width direction during rolling of the thin plate, when the rolling speed is low, the first intermediate roll is also rotated at low speed, so that the first intermediate roll and the workpiece The frictional resistance in the moving direction generated between the rolls increases. Therefore, when a rolling speed is slow, large force is needed in order to shift a 1st intermediate | middle roll to a board width direction. Therefore, it becomes difficult to realize high precision shape control.

Fig. 5 is a conceptual diagram of a shape control method for presenting a rolling speed by a sensmere rolling mill and a shape control range of two actuators. That is, as shown in Fig. 5, when the sensile rolling mill is operating at 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 sensimilar rolling mill is performed. Is operating at a high speed (for example, 100 to 600 mpm), the first intermediate roll 13 is enabled, and the crown adjustment of the AS-U roll 11 and the adjustment of the first intermediate roll 13 are performed. Shape control is performed using shift position control.

That is, when the Sensimere rolling mill is operating at a low speed, the plate shape is changed only by the crown adjustment (bending amount adjustment) of the AS-U roll 11 in a state where the shift position of the first intermediate roll 13 does not become an appropriate position. Since it correct | amends, it may exceed the limit value (for example, 1 mm) of the curvature amount of the AS-U roll 11. As a result, a situation arises in which the safety control means of the sensimilar rolling mill is activated to stop the control operation of the AS-U roll 11.

Therefore, after the shift of the 1st intermediate roll 13 became the speed state which can be used by shape control, the Sensimere rolling mill monitors the actual shape and the performance value of the deflection amount of the AS-U roll 11, and the 1st intermediate roll The shift position of the 1st intermediate | middle roll 13 is forcibly changed until the shift position of (13) becomes an appropriate position. In addition, in order to maintain the shape of the to-be-rolled material 15 forcibly changing the shift position of the 1st intermediate | middle roll 13, the Sensimere rolling mill adjusts the crown of the AS-U roll 11 (bending amount adjustment). Change the level of the target shape for shape control using. In addition, the Sensimere rolling mill memorizes the shift position at which the shift position of the first intermediate roll 13 is appropriate for each rolling schedule or for each rolling material, and the first intermediate roll 13 so that the distal end of the first intermediate roll 13 is an appropriate position. The shift position of the roll 13 is set previously. Thus, by forcibly shifting the 1st intermediate | middle roll 13 to a suitable position, appropriate shape control can be performed, ensuring that the curvature amount of the AS-U roll 11 does not exceed a limit value (limit).

<First Embodiment>

Next, the specific shape control method of the sensimilar rolling mill (shape control apparatus of Claim) which is 1st Embodiment of this invention is demonstrated in detail. 1 is a block diagram showing a sensei rolling mill. As shown in Fig. 1, the sensei rolling mill 1 is a work roll (third roll) under the control of an AS-U roll (first roll) 11 and a first intermediate roll (second roll) 13. Shape control device 2 for transmitting the shape control signal to the AS-U roll 11 and the first intermediate roll 13 via the rolling mechanism portion for controlling the shape of the rolled material 15 through the 14). And a first intermediate roll position correction device (roll position correcting means) 3 for transmitting a correction signal for correcting the first intermediate roll 13 to an appropriate position, and a first one. A first intermediate roll position setting device (roll position setting means) 4 which transmits a setting signal for setting the intermediate roll 13 at a proper position in advance, and a shape detector which detects an actual shape of the rolled material 15 ( 5) and the target shape setter 6 which calculates the deviation S13 of the shape performance value S11 and the shape target value S12.

Moreover, the shape control apparatus 2 is the agent which performs shift position control of the AS-U roll shape control part 21 which performs crown adjustment (bending amount adjustment) of the AS-U roll 11, and the 1st intermediate | middle roll 13 1 The roll roll shape control part 22 is comprised.

In addition, the input signal to the shape control apparatus 2 is the angle set by the shape performance value S11 and the target shape setter 6 measured by the shape detector 5 provided in the exit side of the sensing mill rolling machine 1. A deviation S13 of the shape target value S12 determined by the pass schedule is obtained. Therefore, the AS-U roll shape control part 21 and the 1st intermediate | middle roll shift shape control part 22 perform feedback control so that the deviation S13 of shape performance value S11 and shape target value S12 may be minimum, respectively. Do it.

Here, a specific example will be described with reference to the drawings for the feedback control in which the deviation S13 between the shape performance value S11 and the shape target value S12 is minimum. Fig. 6 is a conceptual diagram showing an example of a shape control method of a sensmere rolling mill, (a) is a configuration and characteristic diagram in a state where there is a shape deviation, and (b) is a shape deviation by the first intermediate roll shift shape control unit 22. (C) shows the structure and characteristic diagram of the state which controlled the shape deviation to the minimum by the AS-U roll shape control part 21 at the minimum.

For example, as shown in Fig. 6A, when the AS-U roll 11 is not warped and the first intermediate roll 13 is not shifted, the plate width direction as shown in the characteristic diagram on the right is shown. Large shape deviation occurs over the entire area. At this time, the first intermediate roll shift shape control unit 22 intends to remove the shape deviation by moving the shift position of the upper and lower intermediate rolls 13 outward as shown by an arrow as shown in Fig. 6B. As a result, the shape deviation is controlled to the minimum over the entire region in the plate width direction as in the characteristic diagram on the right. In addition, the AS-U roll shape control unit 21 attempts to eliminate the shape deviation by changing the warp amount of the AS-U roll as shown in Fig. 6C. As a result, the shape deviation is controlled to the minimum over the entire region in the plate width direction as in the characteristic diagram on the right.

However, as mentioned above, the movement speed which the 1st intermediate roll 13 shifts is slow compared with the bending speed of the AS-U roll 11, and the range of the control effect of the 1st intermediate roll 13 is a determination part. Since it is limited, it is necessary to control the curvature amount of the AS-U roll 11 using the AS-U roll shape control part 21 as much as possible. In addition, since the Sensimere rolling mill 1 is operated in a speed pattern of stopping the mill after the low speed → high speed → low speed, as shown in Fig. 5, in the low speed speed range at the beginning of rolling or just before the end of rolling, The control of the first intermediate roll 13 by the first intermediate roll shift shape control unit 22 is not effective. Therefore, shape control is performed only by control of the curvature amount of the AS-U roll 11 by the AS-U roll shape control part 21 in a slow speed area | region.

As a result, in the control of the amount of warpage of the AS-U roll 11 by the AS-U roll shape control part 21, the amount of warpage of the AS-U roll 11 increases as shown in the configuration of FIG. The margin of margin of deflection may be lost or the limit value (limit) of deflection may be reached. That is, the AS-U roll 11 has a deflection of more than a predetermined value (for example, 1 mm) because a mechanical deviation limit is provided between the saddles 18 so that the roll shaft is not bent by bending. The operation cannot be performed.

For example, as shown in the configuration diagram of Fig. 6 (c), the warpage amount of the AS-U roll 11 is large, and the warpage variation between the saddles 18 of the AS-U roll 11 is limited to the limit value. When it reaches, when the shape of the to-be-rolled material 15 changes abruptly, since the 1st intermediate | middle roll shift shape control part 22 tries to control the shift position of the 1st intermediate | middle roll 13, the responsiveness of shape control deteriorates. do. In addition, when the rolling speed becomes low, since the shift control of the 1st intermediate | middle roll 13 by the 1st intermediate | middle roll shift shape control part 22 does not become effective, when a desired shape control cannot be performed as a result. Occurs.

Therefore, when the warpage amount of the AS-U roll 11 reaches a limit value (limit) as shown in the configuration diagram of Fig. 6 (c), when the bending speed becomes larger, the rolling speed becomes high and then the first intermediate roll 13 As the shift position is changed to the desired position, the first intermediate roll shift shape control unit 22 controls the shift position of the first intermediate roll 13, and AS-U as shown in the characteristic diagram of FIG. The means for controlling the 1st intermediate | middle roll 13 is needed so that shape deviation may be minimum in the range which the curvature of the roll 11 does not exceed a limit value (limit).

1, 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 a limit value (limit). It is a means of controlling the 1st intermediate roll 13 so that a deviation may be minimum. This 1st intermediate | middle roll position correction apparatus 3 is a deviation S13 of shape performance value S11 and shape target value S12, the amount of warpage of the AS-U roll 11, and the shift of the 1st intermediate | middle roll 13 1st intermediate | middle roll shift instruction S15 so that the shift position of the 1st intermediate | middle roll 13 may be made into an appropriate position, inputting rolling results S14, such as a position and a rolling speed, and maintaining an actual shape in a target shape, The AS-U roll position command S16, the target shape correction value S18 to the 1st intermediate | middle roll shift shape control part 22, and the target shape correction value S17 to the AS-U roll shape control part 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 correction device 3 in the sensemere rolling mill of FIG. As shown in Fig. 2, the first intermediate roll position correction device 3 includes a first intermediate roll position acceptance determination unit (roll position acceptance determination unit) 30, an AS-U roll target shape correction unit (first roll). Target shape correction unit 31, first intermediate roll target shape correction unit (second roll target shape correction unit) 32, first intermediate roll shift position correction unit (second roll position correction unit) 33, and The AS-U roll position correction unit (first roll position correction unit) 34 is provided.

The first intermediate roll position acceptance determination unit 30 uses the deviation S13 between the shape performance value S11 and the shape target value S12 and the rolling performance S14 to shift the position of the first intermediate roll 13. It is determined whether is a proper position. The determination is performed using a rule base, for example. As a rule base, for example, "the position of the saddle 18 of the shortest in the AS-U roll 11 exceeds the operation limit of a closing direction, and the taper position of the 1st intermediate roll 13 is a plate width. Inside, and when the actual shape determination unit matches the target shape, it is necessary to change the shift position of the first intermediate roll 13 '.

When the 1st intermediate roll position acceptance determination part 30 determines that it is necessary to change the shift position of the 1st intermediate roll 13, the 1st intermediate roll shift position correction part 33 will generate the 1st intermediate roll shift instruction ( S15) is superimposed on the output signal of the 1st intermediate | middle roll shift shape control part 22, and the shift position of the 1st intermediate | middle roll 13 is corrected to ramp shape. At this time, when the rule base is operated, the shift position of the first intermediate roll 13 is shifted outward to increase the shape of the determination unit. As a result, since the shape changes to the elongation of the judgment part, the AS-U roll 11 operates under the control of the AS-U roll shape control part 21 accordingly, and as a result, the AS-U roll 11 The position of the saddle 18 at the shortest end moves away from the closing direction operating limit to the safety side.

In addition, when the shift of the first intermediate roll 13 is shifted outward, it is predictable that the shape of the judgment portion is changed. Therefore, the AS-U roll position correction portion is not waited for without waiting for the operation of the AS-U roll shape control portion 21. (34) may superimpose the AS-U roll position command S16 on the output signal of the AS-U roll shape control part 21, and perform crown adjustment (bending amount adjustment) of the AS-U roll 11.

Returning to FIG. 1 again, if the shift position of the first intermediate roll 13 is to be changed while maintaining the actual shape within a constant deviation, the AS-U roll shape control unit 21 and the first intermediate roll shift shape This can be realized by changing the deviation S13 of the target shape input to the control unit 22. For example, when it is determined that the shift position of the first intermediate roll 13 is required in the above rule base, the deviation S13 of the target shape to be input to the first intermediate roll shift shape control unit 22 is determined. The target shape correction value S18 output from the first intermediate roll target shape correction unit 32 is superimposed, and the deviation S13 of the target shape to be input to the first intermediate roll shift shape control unit 22 is changed. Thereby, the 1st intermediate | middle roll shift shape control part 22 shifts the 1st intermediate | middle roll 13 outward, and a shape is changed to the state of the edge of a waveform in a determination part. In addition, the amount of change 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 correction 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 The deviation S13 of the target shape to be input to the roll shape control part 21 is changed. Thereby, the AS-U roll shape control part 21 controls the AS-U roll 11, and is corrected in the direction which extends in a determination part.

Moreover, when inputting the setting S19 from the 1st intermediate | middle roll position setting apparatus 4 with respect to the output signal of the 1st intermediate | middle roll shift shape control part 22, the 1st intermediate | middle roll 13 is previously made to a predetermined position. You can shift. For example, in the 1st intermediate | middle roll position setting apparatus 4, the board | plate thickness, the kind of steel, etc. are learned by the table divided | segmented for every pass | pass. And at the start of rolling, the shift position of the 1st intermediate | middle roll 13 is selected from a table rather than a rolling schedule, and the 1st intermediate | middle roll is previously made by setting (S19) from the 1st intermediate | middle roll position setting device 4 By shifting (13) to a desired position, the position correction time by the first intermediate roll position correction device 3 can be shortened.

<2nd embodiment>

In the first embodiment, a senseim rolling machine has been described, but in the present embodiment, a six-stage rolling machine composed of six rolls as well as up and down will be described.

7 is a configuration diagram of a six-stage rolling mill. In the six-stage rolling mill 50 of the second embodiment, the work roll 55, the lower work roll 56, the upper middle roll 53, the lower middle roll 54, and the upper backup roll are sandwiched with the rolled material 15. 51) and six rolls of the lower back-up roll 52 are comprised.

The upper intermediate roll 53 and the lower intermediate roll 54 are each tapered at an end portion opposite the plate width direction, and can be shifted in the axial direction as shown by the arrow in FIG. 7. The upper and lower intermediate rolls 53 and 54 can control the shape of the judging portion of the rolled material 15, in particular, similarly to the first intermediate roll 13 in the sensmere rolling mill 1 shown in FIG. Moreover, the work roll bender 57 is provided in the edge part of the upper work roll 55 and the lower work roll 56. As shown in FIG. The work roll bender 57 bends the roll in the same manner as the AS-U roll 11 of the Sensmere rolling mill 1 shown in FIG. 1 while changing the rolling pressure applied to the rolled material 15. It is possible to control the bending of the plate shape of 15).

Also in the six-stage rolling mill 50 of FIG. 7, similarly to the first intermediate roll 13 in the sensmere rolling mill 1 shown in FIG. 1, the upper and lower intermediate rolls 53 and 54 have a slow rolling speed. Has a problem that it cannot be shifted in the plate width direction. Therefore, when a rolling speed is slow, since only the work roll bender 57 is operated and shape control is performed, the case where the shift position of the upper and lower middle rolls 53 and 54 does not become an appropriate state may arise. Therefore, it becomes possible to control the shift position of the upper and lower middle rolls 53 and 54 to an appropriate position by the structure similar to the Sensimere rolling mill 1 of FIG. 1 in said 1st Embodiment.

8 is a configuration diagram of a six-stage rolling mill according to the second embodiment. As shown in Fig. 8, the six-stage rolling mill 50, which is a shape control device, has a shape control device 61, an intermediate roll position correction device 62, an intermediate roll position setting device 63, and shapes on the six rolls described above. The detector 5 and the target shape setter 6 are provided.

The shape control apparatus 61 is equipped with the intermediate roll shift shape control part 61a and the work roll bender shape control part 61b. In addition, the intermediate roll position correction device 62 is added to perform processing such as target shape correction, intermediate roll shift, and AS-U roll position command such as the first intermediate roll position correction device 3 shown in FIG. It can be carried out. In addition, by adding an intermediate roll positioning device 63 that performs the same control process as the first intermediate roll positioning device 4 shown in FIG. 1, the intermediate roll position is desired in advance according to the type of material to be rolled or the like. You can also set it to a location. As described above, the present invention can also be applied to a six-stage rolling machine as in the case of the sensimilar rolling mill (similarly).

Summarizing the above, the Sensimere rolling mill 1 which is one Embodiment of this invention is equipped with the crown adjustment mechanism of the AS-U roll 11, the shift mechanism of the 1st intermediate roll 13, and the shape detector 5, have. And when shape control is performed in the sensile rolling mill 1, the quality of the shift position of the 1st intermediate | middle roll 13 is determined, and the shift position of the 1st intermediate | middle roll 13 is correct | amended. At this time, the quality determination of the shift position of the 1st intermediate | middle roll 13 is performed using the actual shape, the curvature amount of the AS-U roll 11, and the shift position of the 1st intermediate | middle roll 13. As shown in FIG. Thereby, even if a shift operation cannot be performed when the 1st intermediate | middle roll 13 is low speed rolling, the 1st intermediate | middle roll 13 is carried out by the timing at the time of high-speed rolling, looking at the curvature amount of an AS-U roll 11, and an actual shape. The shift position of is corrected to an appropriate position. Therefore, even if the shape control by the shape control apparatuses, such as the Sensimere rolling mill 1, is performed by the crown adjustment (adjustment of a deflection amount) of the AS-U roll 11, and the shift position control of an intermediate roll, both rolls are always appropriate | suited. While maintaining the position, good shape control can be performed in the entire speed range. In addition, correction of the shift position of a 1st intermediate | middle roll is performed by directly changing the shift position of a 1st intermediate | middle roll.

Moreover, correction of the shift position of a 1st intermediate | middle roll is implement | achieved by correcting the target shape for each of shape control using the crown adjustment of an AS-U roll, and shape control using the shift of a 1st intermediate | middle roll. Furthermore, after correction | amendment, the data of the shift position of a 1st intermediate | middle roll is memorized, and when carrying out the following rolling, the time of shape control can be shortened by setting the shift position of a 1st intermediate | middle roll previously based on the data. have.

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

The shape control apparatus of the present invention can be effectively used in a sensimilar rolling mill, a six-stage rolling mill, or the like, which performs rolling of metal materials.

Claims (10)

A first roll for varying the amount of warpage to vary the pressing force of the plurality of rolls between the rolled materials, a second roll for varying the position of the taper formed thereon and varying the pressing force of the rolls or the plurality of rolls between the rolled materials; It is a shape control apparatus provided with the 3rd roll which shape-controls the said to-be-rolled material by at least the press of the said 1st roll, and the press force of the said 2nd roll, On the basis of the shape of the rolled material, the rolling speed, the amount of warpage of the first roll, and the taper position of the second roll, realized by the pressing force of the first roll and the pressing force of the second roll. And a roll position correction unit for correcting the taper position of the two rolls. The roll position correction unit according to claim 1, wherein the roll position correction unit includes a roll position 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 amount of warpage, and the taper position. Shape control apparatus characterized by the above-mentioned. The method of claim 2, wherein the roll position correction unit, And a second roll position correcting portion that corrects the taper position of the second roll based on the deviation of the shape performance and the shape target when the roll position determining unit determines that the taper position of the second roll is not appropriate. Shape control apparatus characterized by including the. The method of claim 3, wherein the roll position correction unit, When the said 2nd roll position correction part correct | amended the taper position of the said 2nd roll, Furthermore, it is equipped with the 1st roll position correction part which corrects the curvature amount of the said 1st roll based on the deviation of the said shape performance and the said shape target. Shape control apparatus characterized by the above-mentioned. The method of claim 4, wherein the roll position correction unit, And a second roll target shape correcting portion for modifying the taper position of the second roll by changing a value of the shape target. The method of claim 5, wherein the roll position correction unit, When the said 2nd roll target shape correction part correct | amends the taper position of the said 2nd roll, It further comprises the 1st roll target shape correction part which changes the value of the said shape target, and corrects the curvature amount of the said 1st roll. Shape control device. The roll position setting unit according to any one of claims 1 to 6, wherein the roll position setting unit holds the rolling record data of the rolled material and sets the taper position of the second roll to a desired position based on the rolling record data. The shape control device further comprising. 8. The shape control apparatus according to claim 7, wherein the shape control apparatus is used as a sensmere rolling mill. A first roll for varying the amount of warpage to vary the pressing force of the plurality of rolls between the rolled materials, a second roll for varying the position of the taper formed thereon and varying the pressing force of the rolls or the plurality of rolls between the rolled materials; It is a shape control method performed by the shape control apparatus provided with the 3rd roll which shape-controls the said to-be-rolled material by the press force of the said 1st roll and the press force of the said 2nd roll, On the basis of the shape of the rolled material, the rolling speed, the amount of warpage of the first roll, and the taper position of the second roll, realized by the pressing force of the first roll and the pressing force of the second roll. Determining whether the taper position of the two rolls is appropriate; 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 the deviation between the shape performance and the shape target; And correcting an amount of warpage of the first roll based on the deviation between the shape record and the shape target when the taper position of the second roll is corrected. The method of claim 9, further comprising: modifying the taper position of the second roll by changing a value of the shape target; And correcting the warp amount of the first roll by changing a value of the shape target when the taper position of the second roll is corrected.

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