JPS58202910A - Controlling device for rolling mill - Google Patents

Abstract

PURPOSE:To control the shifting quantity of work rolls accurately, by providing guide rolls, made capable of pushing and parting from a sheet to be rolled, to the position near the stand of a rolling mill, and preventing the sheet from slipping sideways at the time of shifting the work rolls. CONSTITUTION:Guide rolls 6, 7, 8, 9 are provided to the position near the rolling line of a rolling stand 5 which is made to shift respective work rolls 2, 3, used for rolling a sheet to be rolled, to the axial direction of them by the action of a shifting device 4. And the rolls 6, 7, 8, 9 are made possible to push, to set the position of, and to part from both of the side ends and both of the upper and lower surfaces of the sheet 1. One roll 6 of the rolls 6, 7 is made possible to push, to set the position of, and to part from the sheet 1 through a worm, a worm wheel, and a nut 13, and the roll 7 is also made possible to act in the same manner by a pushing cylinder 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a rolling mill that shifts work rolls.

In recent years, a large bending load has been applied to work rolls,
Moreover, the work roll is shifted in order to provide variety to the displacement curve applied to the surface of the work roll.

However, such systems have rare problems in their control. That is, generally, as shown in Fig. 1, a Wlfi phenomenon called edge drop b occurs at the width end of a rolled plate a, and in order to prevent this edge drop b, a tapered part d is provided in the work roll ct4 as shown in Fig. 2. The tapered portion d is aligned with the width end of the rolled plate a.

However, since rolling imIfia causes lateral movement (movement in the width direction) due to various requirements during rolling, it is necessary to adjust the shift amount of the work roll C to follow the movement, and cold rolling requires continuous movement. Since there is a rolling mill and the strip width changes during rolling, it is necessary to shift the work roll C so that the tapered part d matches the edge drop b according to the width change during rolling. Rolled plate a
There is a problem that adjustment cannot be carried out because it shifts together with the work roll C due to frictional force, making it particularly difficult to make delicate adjustments.Furthermore, rolling plate a shifts laterally, causing tension fluctuations. Therefore, there is a problem that the rolling of the rolled plate a is adversely affected.

The present invention has been made in view of these points, and includes a guide roller that can press against and release from the rolling plate at a position close to the rolling mill stand to prevent the rolling plate from shifting laterally when the work rolls are shifted. In addition, accurate shifting is achieved by detecting the pressing position of the guide roller against the rolling plate and adjusting the total shift amount of the upper and lower work rolls according to the amount of traverse of the rolling plate based on the signal. This allows for quantity control.

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. As shown in FIG. 4, a guide roller 6 is placed in the vicinity of the rolling line of the rolling mill stand 5, which is capable of pressing against, positioning, and separating from both width ends and the upper and lower surfaces of the rolling plate 1.
．． 7, 8.9 will be provided. One of the guide rollers 6 and 7 provided at both width ends in the figure is driven by a motor 10 to press, position, and release the rolled plate 1 via a worm 11, a worm wheel 12, and a nut 13. The other 7 is configured to be able to press, position, and release using the pressing cylinder 14. I
A displacement sensor 15 is provided on the rtl pressing cylinder 14,
It is possible to detect the pressing position of the guide roller 7, that is, the traverse movement position of the rolling plate 1.

FIG. 5 shows the details of the lift device 4, in which the tip bent portion 18 of the extension arm 17 formed on the bearing 16 of the work rolls 2 and 3 (see FIG. 3) is locked to the shift table 19. . The shift table 19 is provided with screws 25.26 which project outward from the housing 20 in parallel with the axis of the work roll 2.3 and are driven to rotate simultaneously via gears 22, 23.24 by the drive of the motor 21. and the shift base 19 is supported by the shift base 19 by the operation of a cylinder 27.
1liJ extension beam 17 [
A clamp device 28 is provided to integrally fix the 111118 to the shift table 19.

FIG. 6 shows an example of a control circuit that incorporates the displacement sensor 15 described above.
Arithmetic device 29 introducing No. 16 and Jx (common) No. 54
Accordingly, the shift amount AX (upper) of the upper work roll 2 and the shift amount ΔX (lower) of the lower work roll 3 are calculated, and No. 18 thereof is introduced into the motor 21 of the shift device 4.

Adjust the shift of the work rolls 2 and 3 (by pressing the guide rollers 6.7 and 8.9 against the rolling plate 1 to fix their positions. At this time, the position of the guide roller 7 is determined by the displacement sensor 15. , III, the traverse position of the rolled plate 1 is detected, and the amount of lateral deviation thereof is taken into account, and the calculation device 29 calculates the respective shift amounts ΔX (up) and ΔX (down) of the upper and lower work rolls 2°3.

ΔX (top) + ΔX (bottom) = ΔX [total] ΔX (top) - +
ΔX (common) + 1/2ΔX (total) ΔX (bottom) --
ΔX (common) + 1/2 ΔX (total) ΔX (total):
Sign opposite amount ΔX of detected amount of rolling plate traverse (common): External command shift wax Each signal ΔX above
(upper) and ΔX (lower) are introduced into the motor 21 in the shift device 4 of the upper and lower work rolls 2 and 3, respectively, and therefore the 1
Screws 25, 26, shift block 19 according to No. 8 value
and the upper and lower work rolls 2.3 are shifted via the extension arm 17. At this time, the rolled plate 1 is moved by the guide roller 6.
Since it is guided on all sides by 7°8.9, it does not cause lateral displacement or buckling when the work rolls 2 and 3 are shifted, so the shift of the work rolls 2 and 3 is ensured. You can do one. Furthermore, since fluctuations in the tension of the rolled plate 1 can be prevented, shifting can be performed while maintaining a good rolling condition.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and that various types of devices can be used for pressing the guide roller against the rolling plate, setting the position, and separating the guide roller, and that the installation of the guide roller may be on the upstream side of the rolling mill stand, downstream side, or both, and a device other than a displacement sensor that can detect the pressed position of the guide roller may be provided, within the scope of the invention. It goes without saying that various changes may be made therein.

According to the above-described rolling mill control device of the present invention, the following excellent effects can be achieved.

(i) Guide rollers are provided so that they can approach and move away from the rolled/rolled plate to prevent the rolled plate from shifting laterally when the work rolls are shifted, so the work rolls can be shifted accurately. .

G) By preventing lateral displacement of the rolled plate, rolling is possible.

0 Detect the pressing position of the guide roller against the rolled plate,
Since the shift amount is calculated in consideration of the detection signal, it is possible to accurately control the shifted image, and
Even when the width of the rolled plate changes during rolling, the shift amount can be automatically controlled in the same way.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the general phenomenon of rolled plates, Fig. 2 is an explanatory diagram of the work roll shift method, Fig. 3 is a front view of a rolling mill stand with a shift device on the work rolls, and Fig. 4 5 is a perspective view showing one embodiment of the present invention, FIG. 5 is a perspective view showing an example of the configuration of a shift device, and FIG. 6 is an explanatory diagram showing an example of a control circuit. 1 is a rolling plate, 2 is an upper punch, a work roll, 3 is a lower work roll,
4 is a shift device, 5 is a rolling mill stand, 6.7.8.9
14 is a guide roller, 14 is a pressing cylinder, 15 is a displacement sensor, and 29 is a calculation device.

Claims (1)

[Claims] l) The rolling plate is provided with a guide roller that prevents the rolling plate from shifting laterally when the work roll is shifted, at a position close to the rolling mill stand that is configured to be able to shift the work roll in the axial direction using a shift device. A rolling mill control device characterized in that it is provided so as to be able to press against and separate from the rolling mill. 2) A guide roller that prevents the rolling plate from shifting laterally when the work roll is shifted is placed close to the rolling mill stand, which is equipped with a shift device so that the work roll can be shifted in the axial direction, and can be pressed against and released from the rolling plate. and a device for detecting the pressing position of the guide roller against the rolling plate, and according to a signal from the position detecting device, the total shift amount of the upper and lower work rolls is adjusted according to the horizontal planting of the rolling plate, and the shift is performed. A rolling mill control device characterized by being provided with an arithmetic device that gives commands to the device.