JPH0359764B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an interstand edger.

[Prior Art] Conventionally, as shown in Fig. 3, an edger equipped with so-called flat vertical rolls a, a having no grooves on the circumferential surface was installed between the stands of a finishing mill to reduce the width of the strip b. When doing so, since strip b is thin and easily buckled, a looper is used to tighten strip b.
Tension is applied to prevent buckling.

[Problems to be Solved by the Invention] However, in such equipment, when a strong pressure is applied to the strip b, the strip b is moved between the vertical rolls a and a toward the final end, that is, the tail, of the strip b. In order to escape from the strong pressure, one end of the material may rise upward as shown by the two-dot chain line, causing an unstable phenomenon. When such a phenomenon occurs, there is a problem that a problem arises in adjusting the width dimension or a flaw occurs at both ends in the width direction. In addition, there was also the problem that the strip b would meander due to various circumstances.

In view of these circumstances, the present invention is designed to prevent the occurrence of unstable strip creeping and meandering.

[Means for Solving the Problems] The inter-stand edger of the present invention is provided between rolling mill stands and has a pair of vertical rolls capable of rolling the strip in the width direction, and rolls at least one of the vertical rolls in the longitudinal direction of the strip. The inter-stand edger is configured to be movable in the strip longitudinal direction, and includes: a pair of vertical rolls arranged so as to be tiltable in the longitudinal direction of the strip, a pair of tilting cylinders capable of tilting each of the vertical rolls separately in the longitudinal direction of the strip; A pair of lifting amount detectors detecting the lifting amount at both width ends of the strip, and based on the detection results of each lifting amount detector, when a rising or falling phenomenon occurs at one end in the width direction of the strip, a rise or fall is detected. The vertical roll on the side can be used as a strip in the forward or backward direction.
a tilting angle calculator for calculating each tilting angle for tilting the opposite vertical roll backwards or forwards in the strip traveling direction; and a tilting unit for issuing operation commands to each of the tilting cylinders based on the calculation results of the tilting angle calculator. The present invention is characterized by comprising a controller.

[Function] Therefore, when the strip meanderes, at least one vertical roll is moved in the strip advancing direction, and when one end of the strip in the width direction rises or falls, the detection result by the lift amount detector Based on this, the tilting angle calculator calculates the tilting angle of each vertical roll. Based on the calculation result, the tilting controller issues an operation command to each tilting cylinder, and the vertical roll on the raised or lowered side becomes the tilting cylinder. At the same time, the vertical roll on the opposite side is tilted by the tilting cylinder at a required angle in the forward or backward direction of the strip, and the inclination in the width direction of the strip is quickly returned to the horizontal state. .

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of the present invention, in which a rolling mill stand 3 consisting of a work roll 1 and a backing roll 2,
An edger 6 for width reduction rolling of the strip 5 is provided between the strips 4 and 4, and a looper 8 for applying tension to the strip 5 via a looper roll 7 is provided upstream of the edger 6 in the strip line.

The edger 6 has a pair of vertical rolls 9a and 9b arranged on the left and right sides with the strip 5 in between.In FIG.
is located on the other side. These vertical rolls 9
a and 9b are supported by housings 10a and 10b, respectively, and are provided so as to be tiltable along the stripline along with housings 10a and 10b by spherical seats 11a and 11b.

Reference numerals 12a and 12b are cylinders for tilting, and the rod tips are connected to the housings 10a and 10b, and the cylinder bodies are connected to the frames 13a and 13b, so that the vertical rolls 9a and 9b can be tilted at any angle. It's summery. Further, as a control system for issuing predetermined operation commands to these tilting cylinders 12a and 12b, there are left and right lift amount detectors 14 for detecting the lift amount of the width end portion of the strip 5.
a, 14b, and a tilting angle calculator 15 that calculates how much each of the vertical rolls 9a, 9b should be tilted in order to prevent the uphill phenomenon based on the detection results of the lift amount detectors 14a, 14b. , both tilting cylinders 12 based on the calculation results of the calculation unit 15.
Tilt controller 1 that issues direct operation commands to a and 12b
6. Although only the front side is shown in FIG. 1, the configuration on the other side is the same.

Further, the spherical seats 11a, 11b are integrated with the tilting cylinders 12a, 12b into a frame 13a,
13b, and as shown in FIG. 2, offset cylinders 17a, 17b that operate in the stripline direction are connected to the frames 13a, 13b.
The operation is controlled by the control circuit described below.

That is, the meandering amount detectors 18a and 18b installed on the entrance side of the rolling mill stand 4, and the meandering amount detector 18
an offset amount calculator 20 that calculates the offset amount from the detection signals from a and 18b and the setting signal 19;
and an offset amount controller 21 which issues a predetermined operation command to the left and right offset cylinders 17a, 17b based on the offset amount signal from the calculator 20.
It has Note that 22 represents a summing amplifier.

In such a configuration, the conveyed strip 5
When rolling in the width direction by applying a strong rolling force to the strip 5, if the strip 5 approaches the vertical rolls 9a and 9b, the lift amount detector 14 of the strip 5
a, 14b detects the amount, and based on the results, the tilting cylinders 12a, 12b are operated via the calculator 15 and the controller 16, and both vertical rolls 9a, 9b are tilted by a predetermined angle. , the looming phenomenon is automatically prevented.

In the above case, for example in FIG. 1, when the front side of the strip 5 approaches, the vertical roll 9a on the front side is tilted by an angle θ with respect to the traveling direction of the strip 5, and the vertical roll 9b on the other side is tilted backward. It is forced to tilt by an angle θ. In the figure, forward direction is shown as + and backward direction is shown as -. By doing this, the front side of the slip 5 is lowered,
The other side rises and the strip 5 tries to return to the horizontal state.

In this way, by controlling the operation so that at least the vertical roll 9a or 9b on the side of the creeper is tilted forward, the phenomenon of creeping up is prevented.

In addition to dealing with the rising phenomenon, that is, the rising phenomenon of the strip 5, it is of course effective in dealing with the falling phenomenon of the strip 5. That is, when the strip 5 descends, the amount of descent is detected by the detector 14.
a, 14b, and the vertical rolls 9a, 9b are tilted based on the detection results. In this case, the phenomenon can be prevented by tilting at least the vertical roll 9a or 9b on the side where the downward phenomenon has occurred rearward.

By the way, in such equipment, the looper 8
When this tension control is performed, the strip 5 moves up and down while remaining horizontal with respect to the vertical rolls 9a and 9b. Therefore, in such a case,
By tilting both the vertical rolls 9a, 9b in the same direction, the angle formed by the axis of the vertical rolls 9a, 9b and the strip 5 is corrected to a normal angle.

In this way, the feedback control automatically prevents unstable rising and falling phenomena of the strip 5, and also prevents the strip 5 and the vertical roll 9 from rising and falling.
The angle formed by the a and 9b axes is also controlled to be constant.

On the other hand, if meandering occurs as the strip 5 advances, the amount of meandering can be determined by the meandering detectors 18a, 18.
b, and based on the detection result, the offset cylinders 17a, 17b are operated via the arithmetic unit 20 and the controller 21, and the vertical rolls 9a, 9b are automatically controlled to move.
The mutual positions of a and 9b are offset by a predetermined amount, thereby correcting the meandering phenomenon downstream of the vertical rolls 9a and 9b.

Now, in FIG. 2, when the strip 5 meanders as shown by the solid line from the normal position shown by the one-dot chain line, the vertical roll 9b is moved from the position shown by the solid line to the position shown by the two-dot chain line in accordance with the amount of meandering. Then, a predetermined offset amount is set. By doing this, the strip 5 is returned to the position shown by the dashed line by the action of the rolling force of the vertical rolls 9a and 9b. These operations are automatically performed by feedback control to prevent meandering. In this case, the vertical rolls 9a and 9b not only perform the work of preventing meandering, but also perform the original rolling in the width direction.

It should be noted that the present invention is not limited only to the above-mentioned embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As explained above, according to the present invention, in addition to being able to prevent meandering during width rolling, when a rising or falling phenomenon occurs at one end in the width direction of the strip, the vertical rolls are moved against each other. Since the strip is tilted in the direction, it is possible to quickly return to the horizontal state the inclination in the width direction caused by the rise or fall of one end of the strip in the width direction, and to effectively prevent the rise or fall of the strip. In addition to being able to satisfactorily adjust the width dimension, it is possible to achieve excellent effects such as being able to improve the quality of the product without causing flaws at both ends in the width direction.

[Brief explanation of drawings]

FIG. 1 is a schematic side view for explaining one embodiment of the present invention, FIG.
The figure is a sectional view of a rolling line for explaining the conventional problems. 3 and 4 are rolling mill stands, 5 is a strip, and 6
9a, 9b are vertical rolls, 12a,
12b is a tilting cylinder; 14a, 14b are lift amount detectors; 15 is a tilting angle calculator; 16 is a tilting controller; 17a, 17b are offset cylinders;
8a and 18b are meandering detectors, 20 is an offset amount calculator, and 21 is an offset amount controller.

Claims (1)

[Claims] 1. An inter-stand edger that is installed between rolling mill stands and has a pair of vertical rolls capable of rolling the strip in the width direction, and at least one of the vertical rolls is configured to be movable in the longitudinal direction of the strip,
A pair of vertical rolls each arranged to be tiltable in the longitudinal direction of the strip, a pair of tilting cylinders capable of tilting each of the vertical rolls separately in the longitudinal direction of the strip, and detecting the amount of elevation of both width ends of the strip. Based on a pair of lift amount detectors and the detection results of each lift amount detector, when a rise or fall phenomenon occurs at one end in the width direction of the strip, the vertical roll on the side that has risen or fallen is moved forward or backward in the direction of strip movement. a tilting angle calculator for calculating each tilting angle for tilting the opposite vertical roll backward or forward in the strip traveling direction; and a tilting angle calculator that issues operation commands to each of the tilting cylinders based on the calculation results of the tilting angle calculator. An inter-stand edger, characterized in that it is equipped with a tilting controller that emits light.