JPH03189011A - Meanderings controller for feeding side of finishing mill - Google Patents

Abstract

PURPOSE:To obtain the large correcting force by detecting the meandering state of the material to be rolled, shifting a pair of upper and lower rolls, levelling, swinging them and controlling the meandering. CONSTITUTION:The pinch roller 3 to feed the material to be rolled W into the finishing mill 1 is made freely movable against the material to be rolled W. The meandering sensor 22 detects the meandering of the material to be rolled W, the controlling means 23 drives the hydraulic cylinders 17, 19, 21 with the signal of the sensor 22. The shift mechanism 11 moves the pinch roll 3 with the operation of the cylinder 17 along the guiding groove 16 to the breadth direction of the material to be rolled W. The levelling mechanism 12 inclines the pinch roll 3 with the operation of the cylinder 19 with the pivot 18 as center on the virtical surface including the breadth direction of the material to be rolled W. The swing mechanism 13 inclines the roll 3 with the operation of the cylinder 21 with the pivot as as center in the horizontal surface of the material to be rolled W. The meandering is corrected with these operations.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a meandering control device on the entry side of a finishing mill that prevents meandering of a rolled material sent to a finishing mill such as a hot rolling line. The material to be rolled is caught in the center to prevent mis-biting into the mill, meandering and camber in the mill, and to improve yield.

[Prior Art] In a finishing mill 1 of a hot rolling line, as shown in FIG. It is sent to the crop shear 5 via the pinch roll 3 and the crop shear side guide 4, and after cutting off the tag (fish tail) at the tip, the oxide on the surface is removed by the scale breaker 6 after passing through the pinch roll 3.
It is designed to be sent through a side guide 7 on the mill entry side.

On the entry side of the finishing mill 1 of such a hot rolling line, if the tip of the rolled material W meanders or runs over the side guides 4 and 7 due to camber, etc., the feeding of the rolled material W may be interrupted. Otherwise, it may become impossible to roll, or it may cause troubles such as a drop in temperature.

Therefore, it is necessary to prevent meandering of the rolled material W, and as an example, Japanese Patent Application Laid-Open No. 77929/1983 discloses a method for preventing meandering of a copper strip on the exit side of a finishing mill.

In this meandering prevention method, as shown in FIG.
), the inclination angle is adjusted within the horizontal plane, thereby correcting the copper strip and preventing meandering at the same time.

[Problems to be Solved by the Invention] However, in the meandering correction using the roller leveler 9, the leveler roll 9a whose angle is adjusted is simply brought into contact with the surface of the copper strip, and the correction force is small, making it impossible to sufficiently correct the meandering. There is a problem.

For this reason, there is a problem that a semi-finished product part of the material W to be rolled, such as a bar, cannot be rolled, resulting in a poor yield.

In addition, if the tip of the material to be rolled W is not caught in the center of the finishing mill 1, meandering or camber may occur within the mill.
If the rear end of the rolled material W does not fit into the center of the mill, meandering and camber will occur as well, resulting in narrowing.
There is also the problem that roll replacement is required.

This invention has been made in view of the problems of the prior art, and aims to provide a meandering control device on the entry side of a finishing rolling mill that can prevent meandering of a rolled material with a large correction force. .

[Means for Solving the Problems] In order to solve the problems of the prior art described above, a meandering control device on the entry side of a finishing rolling mill of the present invention includes a pair of upper and lower pinch rolls on the entry side of a finishing rolling mill. A meandering sensor is provided to be movable relative to the material and to detect the meandering state of the material to be rolled at the entrance side of the finishing rolling machine, and the pair of pinch rolls is shifted, leveled, or swung based on the detection signal from this meandering sensor. The invention is characterized in that it is provided with a control means for controlling the meandering by moving it so as to cause the winding to move.

[Function] According to this meandering control device on the entry side of the finishing rolling machine, the pinch rolls that sandwich the rolled material vertically are shifted (movement in the width direction of the rolled material), and leveling (the rolled material is moved in the width direction). This system enables movements such as front-to-back movement) or swing (movement of the rotation axis center in a horizontal plane), and the movement of the pinch roll is controlled by a control means based on the signal from the meandering sensor. It is possible to correct the meandering while holding the object in place, and obtain a large correction power.

Therefore, the material to be rolled can be caught in the center of the mill, preventing the occurrence of meandering and camber, and improving the yield.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

1 and 2 show an embodiment of the meandering control device on the entry side of a finishing rolling mill according to the present invention, FIG. 1 is a perspective view of a pinch roll moving mechanism, and FIG. 2 is a perspective view of a moving mechanism of a pinch roll. They are a schematic side view and a schematic plan view of the entrance side.

In this meandering control device 10 on the entry side of the finishing mill, the pinch rolls 3, 3, which pinch the rolled material W up and down and send it into the finishing rolling mill 1, are movable relative to the rolled material W, and the movement thereof is controlled. Examples of mechanisms include the shift mechanism 11 shown in FIG. 1(a), the leveling mechanism 12 shown in FIG. 1(b), and the leveling mechanism 12 shown in FIG.
) is provided with a swing mechanism 13 shown in FIG.

That is, the pinch rolls 3, 3 upstream of the side guide 4 on the Cropshire side and upstream of the side guide 7 on the mill entry side
A moving mechanism is provided on one or both of the above.

First, the shift mechanism 11 moves the pinch roll 3 to the rolled material W.
The guide protrusion 15 formed on the roll chock 14 is fitted into the guide groove 16 on the fixed side, and the roll chock 14 moves in parallel to the width direction of the roll, that is, the central axis direction of the roll. Movement of the rolled material W in the width direction is guided.

A fluid pressure cylinder 17 is connected to one side of the roll chock 14, so that it can be shifted to any position.

Therefore, by shifting the roll chock 14 together with the rolled material W held between the upper and lower pinch rolls 3, the rolled material W can be moved in its width direction, and the meandering state can be corrected.

Next, the leveling mechanism 12 is a mechanism that tilts the pair of upper and lower pinch rolls 3 along with the roll chock 14 in a vertical plane, and a horizontal pivot 18 is provided on one side of the roll chock 14, and a horizontal pivot 18 is provided on the other side. The rod tips of the fluid pressure cylinders 19, which extend and contract in the vertical direction, are connected via pins.

Therefore, by expanding and contracting the rod of the fluid pressure cylinder 19, the pair of upper and lower pinch rolls 3 are tilted in a vertical plane including the width direction of the rolled material W, and the meandering state of the rolled material W is corrected. .

Further, the swing mechanism 13 is a mechanism for tilting the pair of upper and lower pinch rolls 3 along with the roll chock 14 in a horizontal plane, and a vertical pivot 20 is provided on one side of the roll chock 14, and a vertical pivot 20 is provided on the other side in the feeding direction. The rod tips of the fluid pressure cylinders 21, which are expanded and contracted, are connected via a bottle.

Therefore, by expanding and contracting the rod of the fluid pressure cylinder 21, the pair of upper and lower pinch rolls 3 are tilted in a horizontal plane parallel to the front and back directions of the rolled material W, and the meandering state of the rolled material W is corrected.

In this meandering control device 10 on the entry side of the finishing rolling mill,
Each moving mechanism 11, 12 detects the meandering state of the rolled material W.
．． 13, a meandering sensor 22.22 is provided upstream of the cropshire side guide 4 and/or upstream of the mill entry side guide 7, and a meandering sensor 22.22 is provided so as to be input to the control means 23.23. It has become.

As the meandering sensors 22, 22, an optical type or a touch roll type is used to detect whether or not the rolled material W is meandering.

The control means 23.23 also includes a meandering sensor 22.22.
The meandering amount of the rolled material W is calculated based on the detection signal from the
．． The amount of expansion and contraction of the rod required for meandering correction is outputted as a control signal to the hydraulic cylinders 17, 19, and 13 for driving.

Meandering control device 1 on the entrance side of the finishing rolling mill configured as described above
According to No. 0, when the meandering of the rolled material W is detected by the meandering sensors 22, 22, the amount of meandering is determined by the control means 23, 23, and the hydraulic cylinder for driving each moving mechanism 11, 12, 13 is activated. At 17, 19, and 21, the amount of expansion and contraction of the rod necessary for meandering correction is output as a control signal, so the rolled material W is moved while being held between the upper and lower pinch rolls 3, and the meandering is corrected with a large correction force. Ru.

Therefore, the tip of the rolled material W is prevented from coming into contact with the side guide 4.7 and becoming unfeedable or being cooled, resulting in an improvement in yield.

Further, since the material to be rolled W is caught in the center of the mill, meandering and camber within the mill can be reduced.

Furthermore, meandering and camber inside the mill are reduced, so
The occurrence of squeezing can be reduced, and the frequency of roll replacement can be reduced.

In the above embodiment, the meandering sensor and the pinch roll moving mechanism were provided both upstream of the cropshire side guide and upstream of the mill entry side guide, but it is preferable that the meandering sensor and the pinch roll moving mechanism be provided on at least one of them. Also good.

Further, the moving mechanism is not limited to the case where shifting, leveling, and swinging are performed independently, and may be a moving mechanism that performs a combination of these operations.

[Effects of the Invention] As described above in detail with one embodiment, the meandering control device on the entry side of a finishing rolling mill of the present invention shifts the pinch rolls that sandwich the material to be rolled vertically. It enables movements such as (moving the rolled material in the width direction), leveling (moving the rolled material in the front and back directions), or swinging (moving the center of the rotating shaft in a horizontal plane), and pinch rolls are activated by signals from the meandering sensor. Since the movement of the roller is controlled by the control means, the meandering can be corrected while holding the material to be rolled, and a large correction force can be obtained.

Therefore, it is possible to prevent the rolled material from being caught in the mill, and it is also possible to cause the rolled material to be caught in the center of the mill, preventing meandering and camber from occurring, and improving yield. .

18.20: Pivot, 22: Meandering sensor, 23: Control means, W: Rolled material.

Claims (1)

[Claims] A pair of upper and lower pinch rolls are provided on the entry side of the finishing rolling mill so as to be movable relative to the rolled material, and a meandering sensor is provided to detect the meandering state of the rolled material on the entry side of the finishing rolling mill. A meandering control device on the entry side of a finishing rolling mill, characterized in that a control means is provided for controlling meandering by shifting, leveling, or swinging the pair of pinch rolls in response to a detection signal.