JPS58188257A - Method and equipment for winding metal band - Google Patents

Abstract

PURPOSE:To reduce the camber of a band in hot rolling, by skewing the axis of a guide roll to that of a coiler located just downstream to the guide roll, depending on the deviation of the band along the width from the reference position just upstream to the coiler. CONSTITUTION:After a band 21 is hot-rolled, its camber or deviation along the width is found out by a position detector 26. The output signal of the detector 26, which is produced when the time of starting of winding of the front edge of the band 21 around a coiler 23 is detected by a load cell 28, is set for a winding reference position by a setting unit 29. The difference between the reference position and the width-directional position of the band 21 found out by the detector 26 is determined and integrated with time by a calculator 30. The integrated value is multiplied by a constant dependent on the response characteristic of a tilt controller 31 and the passing speed of the band 21, to generate a titlted position signal. The tilt controller 31 drives a tilting cylinder 25 by a necessary quantity through an oil quantity calculator 32, a servovalve 33 and a displacement meter 34 depending on the tilted position signal to tilt guide roll 22 to an appropriate position to continuously wind the band 21 in a prscribed position around the coiler 23.

Description

[Detailed description of the invention] The present invention relates to a method and apparatus for winding a metal strip.

Recently, in hot rolling, control methods using high-performance automatic plate thickness control (AGC) using hydraulic rolling equipment, automatic plate width control (AWC) using width gage and edger mill, etc. have been implemented. Its dimensional accuracy has been dramatically improved.

However, in the planar shape where the strip is extended from the top surface,
There is no effective control of camber, which is the bending of the strip. That is, as shown in FIG. 1, the strip 1 after hot rolling has a bottom part or l
Camber C is generated in a vast range of 1fflL. The strip plate 1 is woven into the coiler 2 shown by the number ζ in the second drawing with the planar shape shown in FIG. Serum deviation amount C
This causes a camber similar to that shown in FIG. 1 to remain even at the product stage after cooling, reducing the product yield.

The reason why it is not possible to effectively control the camber that occurs in the strip is as follows. In other words, (1) camber is thought to be caused by the difference between the working side and the driving side of the rolling set in a rough mill, but in normal rolling equipment Iζ
(2) Although camber is also caused by the difference in deformation resistance in the width direction of a rolled material, it is impossible to manage the equipment with high precision to eliminate the occurrence of camber. (3) In order to prevent camber, the camber was actually measured on the exit side of the rough mill;
Even if a method is adopted in which the actual measurement results are fed back to the preceding mill, the mass flow rate of the roughing mill is large and it is not possible to effectively suppress the camber that occurs at the tip of the strip. Controlling it is likely to lead to operational troubles, and even if it is controlled in the first stage, the control effect will not be seen until all stands of the finishing mill have been compressed, and furthermore, if it is controlled in the later stage, it may cause poor flatness. Connect, etc.

The present invention reduces camber that occurs during hot rolling of a strip,
It is an object of the present invention to provide a method and apparatus for winding a gold M strip that can obtain a product with a good planar shape.

In order to achieve the above object, the first aspect of the present invention is to provide a method for winding a hot-rolled wire mesh strip around a coiler at a temperature higher than the recrystallization temperature. Based on the deviation of the width direction position immediately before the coiler from the reference position, the center axis of the guide roll guiding the strip immediately before the coiler is inclined with respect to the center axis of the coiler.

In addition, #42 of the present invention is a guide for guiding the strip immediately before the coiler in a gold III4 strip winding device that winds a hot-rolled gold III4 strip in an fmf state higher than the recrystallization temperature onto a coiler. a roll, a tilting device that tilts the central axis of the guide roll with respect to the central axis of the coiler, and a position detector that detects the widthwise position of the strip immediately before the coiler;
A reference position setter that sets the winding reference position of the strip with respect to the coiler, and a tilt position of the guide roll is calculated based on the deviation of the detection value of the position detector from the winding reference position set by the reference position setter. The device includes a computing unit and a tilting control device that drives and controls the tilting device based on the calculation result of the computing unit.

The present invention will be explained in detail below.

First, a basic practical example of the present invention will be explained.

As shown in FIG. 4 (5) or FIG. ) is guided in a winding direction forming an angle θ with respect to the pass line by pinch rolls 14 (hereinafter both rolls are collectively referred to as guide rolls), and wound around a coiler 15. In addition, in the figure, 16 indicates a wrapper roll. The temperature of the strip plate 11 during winding is usually 500°C.
After winding, the material is self-annealed and embossed. Therefore, the strip 11 is in the coiler 15 in a softened state.
After winding, the distortion during rolling is recovered, and the coil shape after being made into a bottle is fixed during the cooling process, and remains as the planar shape of the product.

Therefore, in the present invention, when winding up the hot-rolled strip 11 as shown in FIG. By making the product strip relatively inclined as shown in Figure 5 and winding it into a coil shape as shown in Figure 6, the camber remaining in the product strip after cooling can be reduced to reduce OJt. In addition, Fig. 5 (2) and 'jJ45 Fig. (13)
In this method, only the working side of the guide roll 13 is moved in the horizontal direction, and the guide roll 13 can be tilted around a tilting center 13A provided on the drive side. 13 toward the finishing mill side, the strip plate 11 is displaced toward the working side, and vice versa as shown in Fig. 5@
When the coiler 151i411 is tilted as shown in the figure, it is displaced to the drive side.

Next, a specific embodiment of the present invention will be described with reference to FIG. #I6.

The hot-rolled strip 21 is guided by a guide roll 22 and wound around a coiler 23. Here, the guide wheel 22 is supported by a support shaft 24 with its driving side as the center of tilting, and is connected to the tip end of a piston rod of a tilting cylinder device 25 that forms a tilting mechanism on its working side. There is. That is, the central axis of the guide roll 22 is tiltable with respect to the central axis of the coiler 23 by the operation of the tilting cylinder device 25.

A coiler 23 of the strip plate 21 is installed downstream of the guide roll 22.
Position detector 26 that detects the width direction position in front of ili
is installed. Note that the position detector 26 only needs to be installed substantially near the guide roll 22;
Therefore, it may be installed on the upstream side. Further, a load cell 28 is disposed at a bearing portion of the wrapper roll 2T disposed around the coiler 23 to detect whether or not the band plate 21 is wound around the coiler 23.

Each detected value of the position detector 26 and the load cell 28 is transmitted to a reference position setter 29. Reference position setting 1112
9, the position detected by the position detector 26 at the start of winding the strip plate 21 around the coiler 23 is set as the winding reference position of the strip plate 21 with respect to the coiler 23. The detection value of the position detector 26 and the setting value of the reference position setting 829 are as follows.
It is transmitted to the computing unit 30. The calculator 30 calculates the inclination position of the guide roll 22 based on the deviation of the detected value of the position detection 1126 from the winding reference position set by the reference position setter 29. The calculation result of the calculation unit 3o is transmitted to the tilting control device f31. The tilting control device 31c is capable of calculating the amount of oil to be supplied to the tilting cylinder device 25 based on the calculation result of the calculation device 30, and the opening/closing is controlled based on the calculation result of the oil amount calculation device 32. The displacement gauge 34 is configured to include a servo valve 33 and a displacement meter 34 which determines the position of the tilting cylinder device 25 and feeds it back to the oil amount calculator 32.

Then # above! The operation of the embodiment shown in Fig. 6iζ will be explained. ◎ After the hot rolling, the strip 21 is detected by the t IIt detector 26 to detect its width direction position, that is, the width direction displacement pupil toward the work side or drive side with respect to the line center. be done. The amount detected by the position detector 26 corresponds to the camber of the strip plate 21 during normal winding. In this embodiment, the position detected by the position detector 26 when the load cell 28 detects the start point of winding the tip of the band plate 21 around the coiler 23 is set as the winding reference position by the reference position setting device 29. The winding reference position is transmitted to a computing unit 30, and the computing unit 30 calculates the deviation between the winding reference position and the momentary widthwise position of the strip plate 21 detected by the position detector 26, The calculation result is integrated over time. The arithmetic unit 30 further calculates the integral value from the tilting control device 3.
By multiplying the response of 1 by a constant given to the speed of sheet passing of the strip plate 21, an inclination position signal for the guide roll 22 is output. In the tilting control device 31, based on the input value from the calculator 30, the oil amount calculator 3
2t, the amount of oil to be supplied to the tilting cylinder device 25 is calculated, and the tilting cylinder device fl125 is operated by the required amount via the servo valve 33 and the displacement gauge 34. Due to the above-mentioned actuation of the tilting cylinder device 25, the guide roll 22 is tilted into the correct tilted position, and the strip 21 is guided onto the guide roll 22 in the tilted state, so that the strip 21 is continuously guided through a constant winding relative to the coiler 23. It is wound up at the take-up position.

The results shown in FIG. 7 will be explained in comparison with the conventional example. FIG. 8 shows the implementation results according to the conventional example, and FIG. 9 shows the camber that is approximately equivalent to that in FIG.
7 shows the result of applying the embodiment shown in FIG. 7 to a strip plate having
The solid line shows the detection value of the transverse position detector of the strip installed near the coiler. Therefore, the camber generated during hot rolling remains as it is as the product camber after cooling.

On the other hand, there is a difference between the two lateral values shown in the w49 diagram, and according to the detection results near the coiler shown by the solid line, camber is detected on the leading edge side, but after that, the present invention is not effective. Through control, the widthwise position of the bran changes around a certain reference position. The product after cooling according to the results shown in FIG. 9 has camber, except for its tip.
can no longer be seen.

It goes without saying that the inclination of the guide roll in the implementation of the present invention may be horizontal, vertical, or any arbitrary inclination direction.

As described above, according to the method and device for winding a Kinmaki strip according to the present invention, the camber that occurs during hot rolling of a strip can be reduced, and a product with a good planar shape can be obtained. has.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the planar shape of the strip after hot rolling, Fig. 2 is a side view showing the rolled-up shape of the strip according to the conventional example, and Fig. 3 is a view along the lll-1i114 shown in Fig. 2. Cross-sectional view, Figure 4 (5
) and Figure 4 are a side view showing the winding state of a general band plate, Figure 5 and Figure 5 are respectively a schematic plan view showing the implementation state of the present invention, and Figure 6 is a schematic plan view showing the state in which the present invention is implemented. 7 is a control system diagram showing a control device used in carrying out the present invention, and FIG. 8 is a sectional view showing the winding state of a strip according to the present invention. A diagram showing the planar shape, FIG. 9 is a miniature diagram showing the planar shape of the strip obtained by implementing the present invention. 11.21 Strip, 13-Deflector roll, 14-
Pinch roll, 15 Coiler, 22 Guide roll,
23・Coiler, 24・Spin shaft, 25・Tilt cylinder device, 26・Position detector, 29・Reference position setter, 30−1j# device,
31 ・Tilt i'llJ koji device. Agent Patent Attorney Osamu Shiokawa 1st t2! Figure 2 Figure 3 ■'' Figure 4 (A) (B) Figure 5 (A) (B) 4 [ Figure 6

Claims (2)

[Claims] (1) In a method for winding a hot-rolled metal strip at a temperature higher than the recrystallization temperature on a coiler,
Based on the deviation of the width direction position of the strip just before the coiler from the reference position, the central axis of the guide roll that guides the strip just before the coiler is tilted with respect to the central axis of the coiler! How to wind up metal strips. (2) In a metal strip winding device that winds a hot-rolled metal strip at a temperature higher than the recrystallization temperature on a coiler,
a guide roll that guides the strip immediately before the coiler; a tilting device that tilts the center axis of the guide roll with respect to the center axis of the coiler; a position detector that detects the widthwise position of the strip immediately before the coiler; a reference position setter that sets a winding reference position for the coiler; and a calculator that calculates the inclination position of the guide roll based on the deviation of the detected value of the position detector from the winding reference position set by the reference position setter. and a tilting control device that drives and controls the tilting device based on the calculation result of the calculation unit number.