JPH0234219A - Side guide control method on strip coiling equipment of hot rolling - Google Patents

Abstract

PURPOSE:To enable trueing up edges of the whole length of the strip in the stage of coiling up the strip by controlling the parallelism for the bus line of the side guide based on the detected side run-out signal of the strip from the side run-out detector. CONSTITUTION:When the strip S rolled by the finish mill 1 arrives just under a side run-out meter 6, its side run-out value is measured and its measured signal C is inputted into a computing control device 10. The front end of the strip S advances further, and at the time of being detected by a front end detector 7 inside the side guide 2, each positioning operation value is outputted from the arithmetic and control unit 10 to each cylinder 9a, 8a, 9b, 8b to position parallel parts 2b, 2a of each guide piece 2B, 2A. Then, according to the variation of the side run-out value C of the strip S detected by the side run- out meter 6 position controlling for the side guide 2 is performed momentarily until the strip S coiling into down coiler 4 is finished. Therefore, the coiling shape of the product is made better and the quality and yield are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a side guide control method in a strip winding facility for hot rolling.

<Prior art> As shown in FIG. 3, a strip rolled in hot rolling passes through a hot run table after exiting a final finishing mill 1, and passes through side guides 2, vias 4 and rolls 3. After that, it is wound up into a coiler shape in a down coiler 4.

Here, the operation timing of the side guide 2 is determined by the load relay signal of the motor 5 when the tip of the strip S is wrapped around the mandrel of the down coiler 4, so that the left and right sides are simultaneously tightened, for example, with a slight margin in the strip width. It is common to do so.

By the way, it is extremely important to align the edges of the coil S-combined in the down coiler 4 in order to prevent damage to the coil edges during handling. A method of controlling the appearance has been proposed.

The content is that a camber detector installed upstream of the side guide detects the bending direction of the strip tip, and based on the detection signal, the side guide in the bending direction is closed independently, and then the strip tip is placed on the coiler mandrel. This is a control method in which the other side guide is closed based on the wrapped detection signal.

<Problems to be Solved by the Invention> However, the method of JP-A No. 63-40615 described above has a problem in preventing the coil from popping out in the width direction due to the bending of the tip of the strip when the strip is wound up by the down coiler. However, it cannot prevent the edges of the entire length of the coil from becoming uneven, which occurs during regular winding.

To do this, it is necessary to add a process to align the coil edges, which causes the problem of extending the delivery time of the product.Also, there is a risk of damaging the edges during handling of the coil, so we cut them off and process them. There are problems such as the unavoidable decrease in yield that occurs due to this process.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a control method suitable for aligning the edges of the entire length of a coil when winding a strip.

Means for Solving the Problems> The gist of the present invention is that when a hot-rolled strip is wound onto a winding equipment via a side guide, a lateral deflection disposed upstream of the side guide is used. The horizontal deflection of the strip is detected using a detector, and the parallelism of the side guide to the path line is controlled based on this detection signal.
This is a side guide control method in a strip winding facility for hot rolling, characterized in that: n.

For Kusaku The present invention will be explained in detail below.

The present inventors installed a photoelectric lateral runout needle immediately upstream of the side guide in front of the down coiler, measured the amount of lateral runout of the strip, and investigated the relationship between the amount of lateral runout and the irregularity of the coil edges.

The results are shown in FIG. As is clear from the figure, the amount of lateral runout detected by the lateral runout meter and the irregularity of the coil edges match extremely well. Note that although the directions of the two are reversed in the figure, this is due to the strip rotating horizontally around a certain point within the side guide.

Therefore, the parallelism of the side guide strip to the path line is adjusted using the magnitude of the lateral runout.
By controlling the rotation of the strip in the horizontal plane, the winding shape of the coil can be controlled.

<Examples> Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view schematically showing an embodiment according to the present invention. In the drawings, the same members as those in the conventional example are given the same reference numerals and the description thereof will be omitted.

In the figure, reference numeral 6 denotes a non-contact lateral runout meter, such as a photoelectric type, for detecting the jf4 runout of the strip S, and is disposed immediately upstream of the side guide 2.

Reference numeral 7 denotes a tip detector such as a hot metal detector for detecting the tip of the strip S, and is attached to approximately the center of the parallel portions 2a and 2b of the pair of guide pieces 2A and 2B of the side guide 2.

8.9 is each guide piece 2A of the side guide 2.

It is a cylinder that individually positions the entry side (upstream side) and exit side (downstream side) of the guide piece 2B.
Cylinders Eta and 8b are attached to A, and cylinders 9a and 9b are attached to guide piece 2B.

10 is an arithmetic and control device, which outputs the output signal Δ of the lateral shake meter 6.
C, the target plate width value W of the strip S, its plate width deviation value ΔW, and the detection signal of the tip detector 7 are inputted, and the side guide 2 is inputted via each cylinder 8a, 8b, 9a, 9b.
The parallelism of the parallel parts 2a and 2b is controlled respectively. Note that the control mode of the arithmetic and control unit IO may be simple proportional control, but general control modes such as proportional integral control may be used.

The operation of the side guide control device configured in this way will be explained below.

■ Set the opening degree of the guide pieces 2A and 2B of the side guide 2 to about 100 degrees wider than the width of the strip S in advance.
This is to prevent the strip S from becoming difficult to pass through the side guide 2 due to local widening or bending of the tip of the strip S.

(2) When the strip S rolled by the finishing mill 1 reaches just below the lateral runout meter 6, the amount of lateral runout is measured, and the measurement signal ΔC is manually input to the arithmetic and control unit 10. Further, the target strip width 1[W of the strip S on the exit side of the finishing mill 1 and its strip width deviation value ΔW are also input at the same time.

Therefore, if we assume that the tip of the strip S is laterally deflected by ΔC toward the drive side (toward the motor 1a side of the finishing mill 1 with respect to the pass line PL), then the side guide 2
The positioning operation fiP of the cylinder 9a on the inlet side of the parallel part 2b of the guide piece 2B on the drive side is performed as shown in (1) below.
Calculate by formula.

P o-= 1/2 ・ (W +ΔW-ΔC-G)・
... (1) Here, G is a control constant determined by the equipment arrangement.

On the other hand, the positioning operation amount Pea of the cylinder 8a on the entry side of the parallel part 2a of the guide piece 2A on the operator side (the side opposite to the pass line PL from the motor Ia of the finishing mill I) is calculated using the following equation (2). do.

PO, -1/2 ・(W+ΔW+ΔC-G) -(
2) Also, the positioning operation ff1 of the cylinder 9b on the exit side of the parallel portion 2b of the guide piece 2B on the drive side at that time
Positioning operation of cylinder 8b on the exit side of parallel part 2a of Pnb and two operator side guide pieces I P oh
are calculated using the following equations (3) and (4), respectively.

Feb-1/2 ・ (W+ΔW)・・・−・・・・
・−・・−・−・・・−・・(3) r'ob=1/2
・(w+ΔW) −−−−−−−−−= (4) Here, positioning operation ff on the exit side of each guide piece 2A, 2B
t P Ilh, P o- as above (3), (4)
The reason why the strip S is corrected according to the strip width deviation value ΔW from the target strip width value W as shown in the equation is that the guide position close to the down coiler 4 is as close as possible to the center of the pass line PL, and the strip S This is based on the knowledge that the less margin there is for the coil, the better the coil winding will be.

■ When the tip of the strip S advances further and is detected by the tip detector 7 in the side guide 2, the arithmetic and control unit 10 sends each positioning operation I P (1111P Oat P Ilh) calculated in step (■) above. *POb
are output to the cylinders 9a, 8a, 9b, 8b, respectively, to position the parallel portions 2b, 2a of the respective guide pieces 2B, 2A.

■ Thereafter, depending on the change in the lateral deflection amount ΔC of the strip S detected by the lateral deflection meter 6, the strip S is moved to the side guide 2 from time to time until the winding is completed by the down coiler 4.
positioning control is performed.

In the above embodiments, the correction was performed using the plate width deviation value ΔW, but in the present invention, this correction is not performed (although some effects can be expected even if the correction is not performed).

When the method of the present invention was applied to the winding control of a strip with a finished board thickness of 2 mm and a board width of 1000 as, 1000 products were unavoidably required to have an additional process or decrease in yield due to poor winding appearance.
The number of coils is 3, which is significantly lower than 50/1000 coils in the conventional method.

<Effects of the Invention> As explained above, according to the present invention, since the side guides are controlled based on the amount of lateral deflection of the strip, the winding appearance of the product is improved, and quality and yield are improved. Contributes to cost reduction.

[Brief explanation of the drawing]

FIG. 1 is a plan view schematically showing an embodiment according to the present invention;
FIG. 2 is a characteristic diagram showing the principle of the present invention, and FIG. 3 is a side view showing the conventional method. l... Finishing rolling mill, 2... Side guide. 3...Pinch roll, 4...Down coiler. 5...Motor, 6...Lateral deflection needle. 7...Tip detector, 8.9...Cylinder. 10... Arithmetic control device. S...Strip. PL...Pass line.

Claims (1)

[Claims] When a hot rolled strip is wound onto a winding equipment via a side guide, a lateral runout detector placed upstream of the side guide is used to detect the lateral runout of the strip, and based on this detection signal. A side guide control method in a strip winding facility for hot rolling, characterized in that the parallelism of the side guides to a pass line is controlled by: