JPS59178116A - Method for controlling loop in rolling installation - Google Patents

Abstract

PURPOSE:To reduce an error at the time of shear cutting on the downstream side of a loop and to make a coiled shape excellent by controlling also the speeds of mills arranged in plural rows on the upstream side, in an installation having a loop for controlling the tension of a rolling material between plural rows of mills and a single row of mills. CONSTITUTION:For instance, a loop position signal HA detected by a detector 5A of an A-line is inputted to a loop-position checking device 6A, and the HA is outputted from the device 6A only to a loop controlling device 9 when the HA is maintained within a controlling range. An A-line controlling ON signal and a set value outputted from a loop-position setter 8 are inputted to the device 9, and loop-correcting speed signals DELTAvo obtained by the prescribed equations are given to the driving motors of mills 1 arranged in plural rows to control the speeds so that the loop position attains an Ho. Next when the HA exceeds the controlling range HMAX, HMIN, the device 6 outputs the equation I or II of output signal to a loop controlling device 7A to obtain a loop-correcting speed signal DELTAva by the prescribed equations. The signal DELTAva is given to respective driving motors of mills 2A arranged in a single row to perform the loop controlling of a rolling material.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a loop control method when a rolling force of 91fH is transferred from a multi-row rolling mill to a single-row rolling mill in a rolling facility having a multi-row rolling mill and a single-row rolling mill. .

[Technical background of the invention and its problems]

As shown in Fig. 1, a multi-row rolling mill 1 and instant rolling mills 2A, 2
Looper 4 A + 4 8 'Fc N9h between B
In a rolling equipment in which the tension of a rolled material can be controlled, the control method described below has conventionally been used as an example of a method for controlling the flow rate between rolling mills.

That is, the loop control between the multi-row rolling mill and the single-row rolling mill is based on the speed of the j11-row rolling mill on the downstream side of the loopers 4A and 4B, and the drive motor (not shown) that drives the single-row rolling mills 2A and 2prfC. A loop correction speed signal is given to the drive,
It was designed to increase the speed of an electrodynamic motor. However, in this control force method, the speed of the multi-row rolling mill l (specifically, the final stage of the multi-row rolling mill) on the upstream side of the loopers 4A and 4B is
, There is no control mechanism even if it is the case of W1.
The speed of all equipment, such as the single-row rolling mill and shear on the downstream side of A and 4B, and the loop correction speed are reduced by ψJ-. Therefore, this causes errors when cutting the rolling phase by the shear on the downstream side, and defects in the shape of the coil when winding the coil.

On the other hand, if there is equipment installed on the downstream side that has a poor moment of inertia, this will limit the response of the loop control, and there will be a drawback that stable 1i11 movement will not be possible.

[Zutomei's purpose]

The invention was made in view of the above circumstances, and it reduces the error when cutting the shear at the lower ff1N stitch 11 of the lunose. ib J, l: ! l) Improved 1, downstream coil winding machine"? It is an object of the present invention to provide a complete loop control method for rolling, which provides a good winding shape and stable loop control of 1-1λ.

[Treatment of the Invention] In order to achieve the above object, the present invention usually includes i, r -
J: #If j-law multi-row rolling drive motor
When the loop position exceeds the limit range, the loop correction speed signal is applied to the drive motors that drive the upstream row rolling cypress and the downstream single row rolling 48, respectively. This is a loop control method in which the speed correction of each drive motor is given by

[Embodiments of the invention]

The method of the present invention will be explained below with full reference to FIG.

FIG. 2 is an example showing a two-Nutland rolling mill, but only the A-line equipment is shown, and the B-line equipment is omitted. Further, the drive motor, drive motor control device, etc. of the rolling mill are also omitted. No is multi-row rolling tL2A
is a single-row rolling mill, and 3A is a loop control device for single-row rolling 4*2 hours. All loop control signals are output. 4A is a looper between multiple row rolling mill 1 and single row rolling mill 2A, 5A is looper 4
The loop position detector A outputs a Luso position signal HAfc. 6A is a loop position checking device;
This is Lorunoi~/, U) TAffi is always a rule that will be described later.
The maximum value HMAX or minimum value HMTN of the preset loop 161 and the loop position signal H of the loop detector 5A are output to the loop control device.
A, respectively, and in the following state, the following output signals are output to the loop control device 7A. That is, when H (H), an output signal of ((■1A)2-(HMAX)2) is output to the loop control device MAX A 7A, which will be described later, and when lIA<HMlN, ((
Outputs the output signal of HMIN2.

Furthermore, IIMIN (when H, < HMAX, an output signal HAk is output to the roof control device 9, which will be described later). ((HA)2-(HMA
x)2), ((HA)2- (nM, NY),
The loop correction speed Δv has a total output of 4 to control the speed of each drive motor (not shown) of each single row rolling mill 2A. This loop correction speed signal Δυ can be expressed by the following equation (11, (2)).

ΔIja = ! 1a' test ((HA) - (HMA
x)2) =−・・・・・・(1) or Δυ1ya′ ((HA) (HMIN)2)−・
...j2) However, L is the loop effect length and h is the gain constant.

Note that 1.5B and 6B r7B are respectively a loop position detector for the B line, a loop position check device,
These are loop control devices and have the same functions as those for the A line described above.

8 is a loop accumulation amount setting device, which is the loop position setting value during one-row rolling (rolling on only one side, e.g. only on the two-person side)
0, loop upper and lower limit position set values, HMA
M□Nf: This is set and this set value is input to the loop control device 9.

The loop control device 9 is a roots position checking device 6A.
, 6 Output signal I from B (□ + HBs Set value I from Rousseau storage root determiner 8 (Or I (MA ) c t
All inputs are input to the HMI N, and a loop correction speed signal Δυ11 number sequence pressure 9+j is output to the drive motor (not shown) of the machine.

+ii J Rougue's Complement j ``The speed signal Δv6 is a value determined by equation (3), <4), and (5) according to the following conditions.

(1) A case where only the A line is loop-controlled.

(2) This is a case where only the B line is loop-controlled.

(Both 3A and B lines are loop controlled at the same time) 1................................... (5) -1 or υO = G a - b (6 (H2MAX H2B')
3, L (H2A I42Mr)...
・・・・・・(5)-2 ・・・・・・・・・・・・(5)-3

In addition, Δυ obtained using equations (3), (4), and (5)
When it is 0 or positive, acceleration control is performed. (511, (5)-
2. (Equations 513 are all maximum value HMAX, m small value “M
This means that the margins of the loop accumulation amounts of the columns having loop positions close to IN are to be made equal.

Next, we will discuss the use of the control device configured as shown in FIG. -1 position A word HA is input to the loop position check device t6.A, and when the loop position HA is within the limit range, only the loop 'v' is sent from the loop 01 position check device 6A to the loop control device 9. 't The falling signal HA is output.The A-line loop control ON signal is fully input to the loop control device within 1'9, and the set value Ho from the loop f accumulation amount setting device 8 is set, so here A loop correction speed Iha number Δvo is obtained from the equation (3), and this obtained signal ΔIJo is applied to the drive motor of the multi-row rolling mill 1 to perform speed control, thereby controlling the loop position of the rolling mill. is limited to 1 so that it becomes the set value Ho.

In this case, the speed of the drive motor of the single-row rolling mill 2A is constantly controlled by the loop control device 3A.

Next, the loop position 1ff1 from the roof 0 position detector 5A is
'Bung out Isylvania HA is l, J, nolj limit range or maximum value H 4 t, finia zJ□ fffj) TM 1-
When the loop position check device ff”j 6 A
Output signal 'p3 + (H
A)2- (HMAx)2) or ((HA)2- (H
, , N)2) is output, and the loop correction speed No. 48 Δv8 is determined from equations (1) and (2). This determined Luzo correction speed ratio Δυ8 is the single-row rolling mill 2A.
Loop control of the rolled material is performed under the influence of the respective drives 111 and ^1υ^.

Note that the drive motor on the upstream side of the single-row rolling mill 2A is given a value 75≦, which is the sum of both the Luso and 0 positive speed signals Δv8 from the loop control device 3A, and the speed control is performed accordingly. Let's do it.

The operations described above are similar to those described above even when only the force E and B lines are used, which is the case where only the loop control of the rolled material on the A line is performed.

Next, the operation when both the A and B lines are under Luso control will be explained. When the loop position detection signals HA r HB from the loop position detectors 5A, 5B are both within the limit range, that is, between the maximum value HMAX and the minimum value HMXN, the loop position checking devices 6A, 6B7 ＞
・The loop position detection signal KA+HB generated by )-1, (5)-2, (5)
− Luso correction speed i = number Δυ by any one of the three formulas
. is obtained, and this obtained signal Δυ0 is the number sequence pressure 1
The speed fli control is performed by applying the speed fli to the first drive motor.

Next, when the loop position detection signals HA and HB from the loop position detectors AA, , 5B exceed the limit range, the outputs from the loop position checking devices 6A and 6B ((
HA)2(HMAX), ((HA)2(HMIN) and ((HB)2- (J(MAX)), ((HB)2
- (HMIN) 2) and loop control device 7A,
It is input to 7B. In the loop control device 7A (1
), the loop correction speed signal Δυ is obtained from equation (2), and also in the loop control) device 7B (1) in the same way as in 7A.

A formula similar to formula (2) (specifically, HA in formulas (1) and (2) is changed to ■IB, and sweet y8 is changed to yb)
The loop corrected speed signal Δub is obtained from . The loop correction speed signal Δυ8 obtained in this way. Δvb is applied to the drive motors of the rolling mills 2A and 2B (not shown), which controls the speed of each drive motor of the single row ft111, and as a result, the loop of the rolled material is controlled. Ru.

On the other hand, even in this state, the loop control device 9 sends a loop correction speed signal Δ
T)o is applied to the drive motor of the multi-row rolling mill 1 to provide speed control, thereby controlling the loop of the rolled material.

In this case as well, each drive motor (upstream side) of the single-row rolling mill is equipped with a loop control system $3A, 3B (not shown).
Loop correction speed signal from and loop control devices 7A, 7B
The loop correction speed signals Δυ& and Δvb are controlled according to the added value.

Such control is performed by sending a loop correction speed signal Δ from the loop control devices 7A and 7B when the loop position falls within the limit value.
ν8. Δνb is interrupted, and the speed of the drive motor of the multi-row rolling mill 1 is controlled mainly by the loop correction speed signal Δυ0 from the loop control device 9, thereby controlling the looseness of the rolled material.

By carrying out the control according to the embodiments described above, the loop control becomes stable, the occurrence of minurol is reduced, and the workability is improved. In addition, when cutting the shear when the bottom of the single row pressure *1) - (, 112 is provided on the r side; Since there is no change in the speed when the tip passes through the loop ff1i control device, -I71-] compatibility is improved.Furthermore, in a coil winding machine where the bottom of the rolling mill 2A is on the 1 side, the speed is increased. Since it is easy to handle and change, the winding shape after rolling is good and high quality coils can be obtained.

Note that the present invention is not limited to the embodiments described above, and can be implemented with the following modifications. In the above-mentioned embodiment, the loop position [猷 check devices 6A, 6B, loop control? 3A, 7, 7B
, the speed side of the drive motor of a multi-row rolling mill, a single-row rolling mill depending on whether or not the roux and position irises are within the limit range. Any method is fine as long as it can be done.

one! /c In the above-mentioned embodiment, the difference in the amount of loop accumulation from the maximum value of the loop and the maximum value of the loop is controlled to zero (in order to sharpen the margin of the amount of loop accumulation of the famous Nutland),
If it is preferable to control the difference to a certain value rather than total zero depending on the loop shape, etc., it may be done so.

Furthermore, although the above-described embodiments are all loopers of the same shape, the same method can be applied even if the loopers are of different shapes.

Moreover, although the case of two strands was given as an example in the above-mentioned embodiment, the same embodiment can be applied even if there are three or more strands.
IIj with less error when cutting shears with II
It is possible to provide a loop control method for rolling equipment in which the winding shape in the upper and downstream coil winders is good and loop control can be performed stably.

[Brief explanation of drawings]

FIG. 1 is a diagram for illustrating the conventional loop cutting method for rolling equipment, and FIG. 2 is a schematic configuration diagram showing a system for implementing the loop control method for rolling equipment according to the present invention. . )...Multi-row rolling mill, 2 people...Immediate rolling mill1. ? A
... Roots 0 care i'l blood 1 device, 4A ... loopa 1.5
A, 5B...Nol-guirr In detector, 6A
, 6B... Loop can holder chiller, 7fi, 7f
3.9...Loop control device, 8.Loop storage coffin 1 setting device.

Claims (1)

[Claims] The rolled material from the multi-row rolling mill is transferred to the single-row rolling mill for rolling, and a loop for controlling the tension of the rolled material is provided between the positive rolling mills of the multi-row rolling mill and the single-row rolling mill 91E@9.
4', the loop position of both the rolling engines is detected, and when the detected value of the loop device exceeds the limit range, the effective length of the loop formed in the rolling mill,
A loop correction speed signal obtained from the loop (z'lh detection value, the limit range, and the gain constant) is applied to the drive motors that drive the rolling mills on the upstream and downstream sides of the looper, respectively, to perform speed correction. All operations, Mf+ %4 When the loop position detection value is within the limit range, the previous Hr: /L-・
A loop control method for a rolling equipment in which the loop correction speed signal is applied only to the drive motor of a multi-row rolling mill on the upstream side of the flat to compensate for the speed.