JPH05314A - Controller - Google Patents

Abstract

PURPOSE:To obtain a plate width controller which can control resetup plate width accurately in a plate width controller wherein roll force plate width control is carried out in a 1st vertical rolling mill and resetup plate width control is carried out in a 2nd vertical rolling mill situated in its downstream. CONSTITUTION:This is a controller wherein a rolling distance of a metal plate 101 in the 1st vertical rolling mill 10 is measured when it is rolled, the roll pass and rolling force of the vertical rolling mill 10 are measured and stored avoiding the tip part of the metal plate 101, the deviations of the roll pass and rolling force are counted based on them and the roll force plate width control is carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device, and more particularly to an automatic plate width control device for a hot rolling mill for forming a predetermined plate width by passing a metal plate material heated at high temperature between rotating rolls.

[0002]

2. Description of the Related Art A block diagram of a conventional plate width control device is shown in FIG.
Shown in.

Referring to FIG. 2, a conventional strip width control device includes a first vertical rolling mill (10) and a first horizontal rolling mill (11).
And a second vertical rolling mill (12) and a second horizontal rolling mill (1
3) and a calculator for controlling the roll force plate width (1
4), a control data setting device (15), a roll opening setting device (16) for the first vertical rolling mill, a computing device (17) for re-setup strip width control, and a second A roll opening setting device (18) for the vertical rolling mill, a strip width gauge (19),
It is composed of a thermometer (20). Further, FIG. 2 shows a metal plate material (101) to be rolled.

The operation of the conventional plate width control device configured as described above will be described below.

The roll force plate width control is performed in the first vertical rolling mill (10), but the roll opening of the first vertical rolling mill is constant over the entire length of the metal plate material (101) according to the following procedure. It is calculated and set for each.

First, the roll opening and rolling force of the first vertical rolling mill (10) immediately after the tip of the metal plate material (101) is bitten into the first vertical rolling mill (10) are measured, and the roll force is measured. An arithmetic unit (14) for controlling the strip width calculates a roll opening deviation and a rolling force deviation during rolling by using the roll opening and the rolling force as reference values.

Next, the sheet width deformation amount of the metal sheet material is predicted based on the roll opening deviation and the rolling force deviation of the first vertical rolling mill (10) which were also calculated by the calculator (14). The second vertical rolling mill (1
2) A roll opening correction amount ΔE1 of the first vertical rolling mill (10) used for suppressing the plate width deformation amount on the exit side.
Is calculated.

The roll opening of the first vertical rolling mill (10) is
This roll opening correction amount ΔE1 and control data setter (1
5) is obtained from the sum of the roll opening setting value E1 set in advance and fed back to the first vertical rolling mill (10) via the roll opening setting device (16) of the first vertical rolling mill. Controlled.

On the other hand, in the second vertical rolling mill (12), the re-setup strip width control is performed, and the roll opening of the second vertical rolling mill is calculated and set by the following procedure.

First, in the control data setting device (15),
In advance, the roll opening setting value E1 of the first vertical rolling mill (10),
Roll opening setting value H1 of the first horizontal rolling mill (11), roll opening setting value H2 of the second horizontal rolling mill (13), target plate on the exit side of the second horizontal rolling mill (13) The width W0 is set. Then, the plate width and the temperature of the metal plate material (101) before being bitten by the first vertical rolling mill (10) are the average plate width W _AVE and the average by the plate width meter (19) and the thermometer (20). It is measured as the temperature T _AVE .

Then, these set / measured values (E
1, H1, H2, W0, W _AVE , T _AVE ), the calculator (17) for the re-setup strip width control is a sheet metal plate on the output side of the second horizontal rolling mill (13). The roll opening calculation value E2 of the second vertical rolling mill (12) is calculated so that the width becomes the target strip width W0. The roll opening of the second vertical rolling mill (12) is based on the roll opening calculation value E2 obtained by the calculator (17), and is used to set the roll opening of the second vertical rolling mill (18). ) Via a second vertical mill (12)
Feedback controlled.

[0012]

As described above,
In the first vertical rolling mill of the conventional strip width control device, after performing a certain period of time after the metal strip has been bitten, in order to perform roll force strip width control with the roll opening and rolling force as reference values, strip The roll opening and the rolling force at the leading end of the metal plate, which greatly varies in width, may be the reference. FIG. 3 shows the relationship between the rolling distance and the roll opening by the roll force plate width control. As shown in FIG. 3, at the tip of the metal plate material where the plate width variation is large, as shown in FIG. There are many cases where the roll opening greatly differs from the set value.

On the other hand, in the second vertical rolling mill located downstream of the first vertical rolling mill, the roll opening of the first vertical rolling mill is set to a preset value (the roll opening set value E1). )
As such, the re-setup board width control is performed. Therefore, when using the roll opening and the rolling force at the leading end of the metal plate material with large plate width fluctuation as the reference value, the accuracy of the re-setup plate width control deteriorates, and at the exit side of the second horizontal rolling mill. There is a problem that the plate width cannot be controlled to the target plate width.

The present invention has been made in order to solve the above problems, in which roll force plate width control is performed in the first vertical rolling mill, and re-rolling is performed in the second vertical rolling mill located downstream thereof. An object of the present invention is to obtain a plate width control device capable of performing re-setup plate width control with high accuracy without being affected by roll force plate width control even when performing setup plate width control.

[0015]

In order to achieve the above object, a control device according to the present invention measures a rolling distance of a metal sheet material during rolling, thereby avoiding a tip end portion of the metal sheet material and a vertical rolling mill. The roll force and rolling force of the first vertical rolling mill are measured and stored, and the roll opening deviation and rolling force deviation are calculated using these as reference values to control the roll force in the first vertical rolling mill. The plate width is controlled.

[0016]

Therefore, according to the strip width control device of the present invention, the rolling distance is measured in the first vertical rolling mill, and the roll force strip width control is performed while avoiding the leading end portion of the metal strip material. Even when performing the re-setup strip width control in the second vertical rolling mill, the correction of the roll opening of the first vertical rolling mill by the roll force strip width control is not affected.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a plate width control device of the present invention.

In FIG. 1, the plate width control device of the present invention is
First vertical rolling mill (10) and first horizontal rolling mill (11)
And a second vertical rolling mill (12) and a second horizontal rolling mill (1
3) and a calculator for controlling the roll force plate width (1
4), a control data setting device (15), a roll opening setting device (16) for the first vertical rolling mill, a computing device (17) for re-setup strip width control, and a second A roll opening setting device (18) for the vertical rolling mill, a strip width gauge (19),
A thermometer (20) and a rolling distance counter (2
1) and.

Next, the operation of the plate width control device of the present invention configured as described above will be described below.

The roll force plate width control is performed in the first vertical rolling mill (10) as in the conventional plate width control device, but the roll opening is calculated and set by the following procedure.

First, the removal distance S at the tip of the metal plate material (101) is set by the control data setting device (15) in the calculator (14) for roll force plate width control. Next, the rolling distance L from the tip is measured by the rolling distance counter (21) from the moment the tip of the metal plate material (101) bites. When the rolling distance L reaches the removal distance S of the tip portion, the roll opening and rolling force are stored in the computing unit (14), and the roll opening and rolling force are used as reference values to determine the total length of the metal plate material (101). The roll opening deviation and rolling force deviation during rolling are calculated and set at regular intervals.

Next, the roll force plate width control calculator (14) also measures the plate width variation of the metal plate from the previously calculated roll opening deviation and rolling force deviation.
The roll opening correction amount ΔE1 of the first vertical rolling mill (10) is calculated in order to suppress the strip width variation on the exit side of the first horizontal rolling mill (11).

The roll opening of the first vertical rolling mill (10) is
This roll opening correction amount ΔE1 and control data setter (1
5) is obtained by the sum with the roll opening setting value E1 preset and feedback control is performed to the first vertical rolling mill (10) via the roll opening setting device (16) of the first vertical rolling mill. To be done.

On the other hand, in the second vertical rolling mill (12), the re-setup strip width control is performed, but the roll opening is calculated and set in the following procedure.

First, in the control data setting device (15),
In advance, the roll opening setting value E1 of the first vertical rolling mill (10),
Roll opening setting value H1 of the first horizontal rolling mill (11), roll opening setting value H2 of the second horizontal rolling mill (13), target plate on the exit side of the second horizontal rolling mill (13) The width W0 is set. Then, the plate width and the temperature of the metal plate material (101) before being bitten by the first vertical rolling mill (10) are the average plate width W _AVE and the average by the plate width meter (19) and the thermometer (20). It is measured as the temperature T _AVE .

Then, these set / measured values (E
1, H1, H2, W0, W _AVE , T _AVE ), the calculator (17) for the re-setup strip width control is a sheet metal plate on the output side of the second horizontal rolling mill (13). The roll opening calculation value E2 of the second vertical rolling mill (12) is calculated so that the width becomes the target strip width W0. The roll opening of the second vertical rolling mill (12) is based on the roll opening calculation value E2 obtained by the calculator (17), and is used to set the roll opening of the second vertical rolling mill (18). ) Via a second vertical mill (12)
Feedback controlled.

[0027]

As described above, according to the control device of the present invention, the roll force plate is measured by measuring the rolling distance of the metal plate material being rolled in the first vertical rolling mill and avoiding the leading end portion of the metal plate material. In order to perform width control, even when performing re-setup strip width control in the second vertical rolling mill located downstream of it, so as not to be affected by the roll opening correction of the first vertical rolling mill by roll force strip width control. Since it is configured, there is an effect that the re-setup plate width control can be accurately performed.

[Brief description of drawings]

FIG. 1 is a block diagram of a plate width control device showing an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional plate width control device.

FIG. 3 is a diagram showing a relationship between a rolling distance and a roll opening by roll force plate width control of a plate width control device.

[Explanation of symbols]

 (10) First vertical rolling mill (11) First horizontal rolling mill (12) Second vertical rolling mill (13) Second horizontal rolling mill (14) Calculator for roll force strip width control ( 15) Control data setting device (16) Roll opening setting device for the first vertical rolling mill (17) Calculator for resetting strip width control (18) Setting roll opening for the second vertical rolling mill Equipment (19) Sheet width gauge (20) Thermometer (21) Rolling distance counter (101) Metal sheet material

Claims (1)

Claim: What is claimed is: 1. A first horizontal rolling mill, a first vertical rolling mill provided immediately before the first horizontal rolling mill, a second horizontal rolling mill located downstream of these rolling mills, and immediately before that. A plate width control device for rolling / forming a metal plate material to a predetermined plate width by a second vertical rolling machine provided in, wherein a plate width gauge is provided on the entrance side of the first vertical rolling machine, Predict and calculate the amount of sheet width deformation during rolling based on the average sheet width value on the inlet side measured by the width gauge so that the sheet width on the outlet side of the second horizontal rolling mill becomes the target sheet width. Re-setup strip width control to correct the roll opening of the second vertical rolling mill,
In order to suppress the strip width variation on the exit side of the first horizontal rolling mill, the strip width variation of the metal sheet material is predicted and calculated from the roll opening and the rolling force in the first vertical rolling mill, and the strip width is calculated. In the strip width control device that simultaneously uses roll force strip width control to correct the roll opening of the first vertical rolling mill from fluctuations, the first vertical rolling mill measures the rolling distance of the metal sheet during rolling. The roll force plate width control in the first vertical rolling mill has means, by measuring the rolling distance of the metal plate material by the rolling distance measuring means, avoiding the tip of the metal plate material, the roll opening of the vertical rolling machine. And a rolling force are measured, and using this as a reference value, the plate width variation of the metal plate material is predicted and calculated.