JPH03230804A - Method and device for controlling horizontal bend of rolled stock - Google Patents

Abstract

PURPOSE:To prevent sudden horizontal bend that is generated at the tip of rolled stock by detecting deviated amount of the width center of rolled stock from the center between right and left edger rolls, shifting the right and left edger rolls before biting with an edger and returning the edger rolls before reaching a horizontal roll. CONSTITUTION:On the inlet side of the edger 2, a horizontal deviaion detector 6 with which the deviated amount x of the width center 14 of rolled stock 4 from the the center 15 between the right and left edger rolls 2a, 2b is provided. Next, an arithmetic unit 8 for shift quantity to which that detected signal 7 is inputted, with which the horizontal deviated amount x0 of the tip part of rolled stock 4 is operated, with which the shift command signal 9 by which the edger rolls 2a, 2b are shifted with the horizontal deviated amount x0 is outputed, on the other side, in which the edger load-on signal from a load cell 13 is inputted and from which the shift command signal 9 for returning the edger rolls 2a, 2b before the tip part of rolled stock 14 is bitten in the horizontal mill 1 is outputed, the device 11a, 11b for controlling the position of edger roll and the load cell 13 with which the edger load-on signal 12 is outputed to the arithmetic unit 8 for shift quantity are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method and apparatus for controlling lateral bending of rolled material.

[Prior Art] Conventionally, as a method for controlling lateral bending of this type of rolled material, there is a method as described in, for example, Japanese Unexamined Patent Publication No. 57-39018, as shown in FIG. horizontal mill 1
An edger 2.3 is provided on the inlet and outlet sides of the edger 1, and a detector 5 is provided on the outlet side of the edger 3 to detect the amount and direction of lateral bending of the rolled material 4. Based on the signals, the edger 3 was calculated, and a position control device (not shown) for the edger rolls 3a, 3b was used to move the left and right edger rolls 3a, 3b in the direction in which the rolled material 4 was bent while maintaining the distance between them. Rolled material 4 by moving the shift amount
I am trying to correct the horizontal curvature.

The principle of correcting the lateral bending of the rolled material 4 using the above control method is as follows. When the edger rolls 3a and 3b are shifted, the left and right load points are shifted in the direction of movement of the rolled material 4, so that a bending moment acts on the rolled material 4. As a result, a tension distribution in the width direction occurs in the rolled material 4 between the horizontal mill 1 and the edger 3.

A tension force acts on the shifted direction (edge roller 3b side) and a compressive force acts on the opposite side (edge roller 3a side), so as a result, the material on the edge roller 3b side elongates more than the opposite side. will increase, and the bend will be corrected.

[Problems to be Solved by the Invention] However, in the conventional control method, among the types of lateral bending shown in FIG. (See Figure 6 (a)).
A horizontal bend (hereinafter referred to as tip nose bend) that occurs only at the tip of the rolled material 4, which is peculiar to a rolling line having a horizontal mill 1 and a horizontal mill 1.
(See Figure 6 (0)) could not be prevented.

The present inventor conducted various studies based on conventional experimental results and actual machine data, and clarified the process by which the tip nose curve of the rolled material 4 occurs.

That is, (a) As shown in FIG. 5(a), the width center 14 of the rolled material 4 is relative to the center 15 between the left and right edger rolls 2a and 2b (which coincides with the width center 15' of the horizontal mill l). When the rolled material 4 enters the edger 2 while being off-centered by Ax, the tip corner of the rolled material 4 on the off-centered side comes into contact with the edger roll 2a.

(B) The rolled material 4 is an Etsjarol 2 as shown in Figure 5 (B).
Pushed by a, the angle of incidence becomes θ.

(A> The rolled material 4 is bitten between the edger rolls 2a and 2b as shown in FIG. 5, Q9, and the tip corner on the opposite side to the off-centered side is highly rolled down.

As the tip of the rolled material 4 bends to the off-center side as shown in FIG.

(@ As the rolled material 4 advances, the inclination of the rolled material 4 on the edger side becomes smaller and smaller as shown in Fig. 5 (E). As a result, the bending of the rolled material 4 also decreases, Bending is limited to the tip.

(f) Horizontal rolling by the horizontal mill 1 further emphasizes the bending of the tip of the rolled material 4 as shown in FIG. 5 (f).

In view of the above circumstances, the present invention aims to provide a method and apparatus for controlling the lateral bending of rolled material, which can prevent the nose bending of the tip of the rolled material, which is characteristic of a rolling line composed of an edger and a horizontal mill. be.

[Means for Solving the Problems] The present invention comprises an edger that rolls a rolled material in the width direction, and a horizontal mill that is disposed on the exit side of the edger and rolls the rolled material in the thickness direction. In the rolling line constructed, the amount of deviation between the width center of the rolled material on the entrance side of the edger and the center between the left and right edger rolls is detected, and the rolled material is bitten into the edger based on the amount of deviation. The left and right edger rolls are shifted in the width direction of the rolled material to reduce the amount of deviation, and the shifted left and right edger rolls are shifted before the rolled material bites into the edger and reaches the horizontal mill. The present invention relates to a method for controlling lateral bending of a rolled material, which is characterized by returning the rolled material to its original position. In a rolling line consisting of a horizontal mill that rolls the material in the thickness direction,
A lateral deviation detector is installed on the inlet side of the roller to detect the amount of deviation between the width center of the rolled material and the center between the left and right edger rolls, detect the timing of the rolled material biting into the edger, and send an edger load-on signal. A shift command signal for calculating the shift amount of the edger roll based on the detection signal of the output biting detector and the lateral deviation detector and shifting the edger roll from the reference position before the rolled material bites into the edger. and a shift amount calculation device that outputs a shift command signal for returning the edger roll to the reference position before the rolled material is bitten by the horizontal mill based on the edger load on signal from the biting detector. and an edger roll position control device for positioning the edger roll in response to a shift command signal from the shift amount calculating device.

[Function] Therefore, the amount of deviation between the width center of the rolled material on the entrance side of the edger and the center between the left and right edger rolls is detected,
Based on the amount of deviation, the edger on the left and right in the width direction of the rolled material is adjusted to eliminate the amount of deviation before the rolled material is bitten by the edger.
The roll is shifted, the rolled material is bitten by the edger,
Before reaching the horizontal mill, the shifted left and right edger rolls are returned to their original positions, so when the rolled material enters the edger, both width ends of the left and right ends of the rolled material are It comes into contact with the edger roll almost evenly and is bitten, preventing the tip from becoming curved.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 (Ibaro) shows an example of an apparatus for carrying out the method of the present invention, in which a width center 14 of a rolled material 4 is installed on the entrance side of the edger 2.
A lateral deviation detector 6 is installed to detect the deviation amount Ax from the center 15 between the left and right edger rolls 2a and 2b, and the detection signal 7 from the inoculation deviation detector 6 is inputted to detect the lateral deviation at the tip of the rolled material 4. amount, 6xo (for example, the average value of the deviation amount Ax detected by the lateral deviation detector 6 for a certain period of time until the tip of the rolled material 4 is bitten by the edger 2)
is calculated and outputs a shift command signal 9 for shifting the edger rolls 2a, 2b from the reference position by the amount of lateral deviation Axo, while an edger load-on signal 12 from a load cell 13, which will be described later, is input and the rolled material 4 is A shift amount calculation device 8 that outputs a shift command signal 9 for returning the edger rolls 2a, 2b to their reference positions before their tips are bitten by the horizontal mill l, and a shift command from the shift amount calculation device 8. The signal 9 is input to the edger roll 2a for the lateral deviation amount AXo.

edger roll position control devices ILa, llb which drive the cylinders oa, lOb of edger 2b and shift edger rolls 2a, 2b;
a load cell 1B that detects that the shift amount calculation device 8 is jammed and outputs a shifter load-on signal 12 to the shift amount calculation device 8;
(biting detector) is provided.

With the configuration as described above, when the tip of the rolled material 4 passes over the lateral deviation detector 6, the inoculation deviation detector 6 detects the difference between the width center 14 of the rolled material 4 and the center 15 between the left and right edger rolls 2a and 2b. The amount of deviation Ax is detected, and based on the amount of deviation Ax, the amount of lateral deviation at the tip of the rolled material 4, ifx
g (for example, the average value of the deviation amount Ax detected by the lateral deviation detector 6 for a certain period of time until the tip of the rolled material 4 is bitten by the edger 2) is calculated by the shift amount calculation device 8, and the rolled material 4 is Before engaging the edger 2, a shift command signal 9 is outputted from the shift amount calculating device 8 to the edger roll position control devices 11a and llb.

When shift command signal 9 is output, cylinder 1 is shifted by edger 0-roll position control devices 11a and llb.
0a, 10b are driven, edger rolls 2a, 2b
While maintaining the roll opening degree, the rolled material 4 is moved 1U in the direction in which the lateral displacement of the rolled material 4 is occurring, as shown by the imaginary line in FIG. 1(a).
Shifted by x0.

When the edger rolls 2a and 2b are each shifted by AXo, the center 15 between the edger rolls 2a and 2b almost coincides with the width center 14 of the rolled material 4, and in this state, the rolled material 4 is As shown in Figure (B), Etsiya-2
As the rolled material 4 is bitten into the material, both width ends of the tip end of the rolled material 4 are reduced in width almost equally by the edger rolls 2a and 2b.
Tip nasal curvature no longer occurs.

Subsequently, the load cell 13 detects that the rolled material 4 is caught in the edger 2, and the load cell 13
When the machine load on signal 12 is outputted from the shift amount calculation device 8 to the shift amount calculation device 8, a timer built in the shift amount calculation device 8 is activated, and after the required time t1 has passed (the tip of the rolled material 4 has reached the horizontal mill 1 Shift command signal 9 for returning the jar rolls 2a, 2b to their reference positions is output before the jar rolls 2a, 2b are bitten by the jar rolls, the cylinders 10a, lOb are driven by the jar roll position control devices 11a, llb, and the jar rolls 2a, 2b are driven. The rolls 2a and 2b are returned to their reference positions as shown by the imaginary lines in FIG.
5 and the width center of the horizontal mill are again aligned.

As a result, the rolled material 4 coming out of the edger 2 is prevented from being off-centered and biting into the horizontal mill 1, which prevents the occurrence of camber (see Figure 6 B) mainly caused by the horizontal mill 1. be able to.

FIG. 2 summarizes the above-mentioned operation as a diagram.

Moreover, FIG. 3 shows a case where the rolled material 4 approaches the edger 2 at a certain incident angle θ, and in this case, as well as the cases shown in FIGS. 1(a) and (b), Lateral slip detector 6
By averaging the deviation amount Ax of the rolled material 4 detected in
Determine the lateral deviation mAxo2, and move the edger roll 2a to the side where the lateral deviation occurs.
2b may be shifted. In this way, when the rolled material 4 is bitten by the edger 2, a force is applied from the edger roll 2b in a direction that reduces the incident angle θ.

The method and device for controlling lateral bending of a rolled material according to the present invention is not limited to the above-described embodiment, and the edger load-on signal 12 can be applied to a rolled material other than the load cell 18 shown in FIG. One of the inventions of the pond is that it can be made from any material as long as it can detect the amount of change (for example, the piston position of the hydraulic cylinder lOa, 10b, etc.) when the edger 4 is caught in the edger 2. Of course, various changes can be made without departing from the spirit of the invention.

[Effects of the Invention] As explained above, the method and device for controlling lateral bending of a rolled material of the present invention has the excellent effect of preventing sudden lateral bending (tip nose bending) occurring at the tip of the rolled material. can be played.

3

[Brief explanation of drawings]

Fig. 1 (Ibaro) is a plan view showing an example of an apparatus for implementing the method of the present invention, Fig. 2 is a diagram showing the relationship between various signals and edger shift amounts, and Fig. 3 is a diagram showing the relationship between various signals and edger shift amounts. A plan view showing the case where the material approaches at an incident angle θ, FIG. 4 is a plan view of the conventional example, and FIGS. , FIGS. 6A and 6B are explanatory plan views of horizontal bending of a rolled material. ■ is a horizontal mill, 2 is an edger 12a, 2b is an edger roll, 4 is a rolled material, 6 is a lateral deviation detector, 8 is a shift amount calculation device, lla, Llb is an edger roll position control device, 13 is a load cell ( (bite detector) is shown.

Claims (1)

[Scope of Claims] 1) A rolling line consisting of an edger that rolls the rolled material in the width direction, and a horizontal mill that is disposed on the exit side of the edger and rolls the rolled material in the thickness direction, The amount of deviation between the width center of the rolled material on the entry side of the edger and the center between the left and right edger rolls is detected, and based on the amount of deviation, the amount of deviation is reduced before the rolled material is bitten by the edger. The left and right edger rolls are shifted in the width direction of the rolled material, and before the rolled material is bitten by the edger and reaches the horizontal mill, the shifted left and right edger rolls are returned to their original positions. A method for controlling lateral bending of rolled material. 2) In a rolling line consisting of an edger that rolls the rolled material in the width direction, and a horizontal mill that is disposed on the exit side of the edger and rolls the rolled material in the thickness direction, rolling is performed on the entry side of the edger. A lateral deviation detector is installed to detect the amount of deviation between the width center of the material and the center between the left and right edger rolls, and a bite detector detects the timing of the biting of the rolled material into the edger and outputs an edger load on signal. and calculates the shift amount of the edger roll based on the detection signal of the lateral deviation detector and outputs a shift command signal for shifting the edger roll from the reference position before the rolled material is bitten by the edger. a shift amount calculation device that outputs a shift command signal for returning the edger roll to a reference position before the rolled material is bitten by the horizontal mill based on the edger load-on signal from the biting detector;
A lateral bending control device for rolled material, comprising: an edger roll position control device that positions the edger roll in response to a shift command signal from the shift amount calculation device.