JPH038515A - Method for controlling looper - Google Patents

Abstract

PURPOSE:To prevent secondary rupture from being generated with the movement of a steel strip by using a roll provided with a disk brake to a fixed roll and actuating the disk brake according to the passing speed of the steel strip to decelerate and stop the fixed roll. CONSTITUTION:The fixed roll 5A provided with a disk brake is used for a fixed roll in a looper 2. A hydraulic pressure supply tube 19 is connected with the disk brake and a regulating valve 20 is closed and opened by a command from a main controller 10 to decelerate and stop the fixed roll 5A. A speed detector 21 is mounted on the shift of the fixed roll 5A and a signal for a detected actual speed of the fixed roll 5A is inputted into the main shaft controller 10. When the actual speed exceeds the reference speed, the disk brake is actuated to give a deceleration torque to the fixed roll 5A and the fixed roll 5A nearly synchronizes the passing speed of the line, decelerates and stops and the overrun of the fixed roll 5A is hindered.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for controlling a looper installed in a line for continuously processing copper strips.

Kutsuchirai's technology For example, when passing a copper strip through a continuous process line that processes steel strip using an annealing furnace, plating equipment, pickling equipment, etc., it is necessary to store the steel strip before and after the process. It is typical of y5 that a looper is provided for this purpose. , the second looper is used to prevent the conveyance of the steel JtF from being stopped in the brise process without stopping the conveyance of the steel JtF outside the process for welding or cutting, and to prevent changes in the conveyance speed. It has the function of sending out the stored steel strip so that it does not get wet.

FIG. 4 is a block diagram showing an example of control of a looper in a continuous process line. The outlet priddle I installed in the input zone (inlet zone of the input process P)
:' It is installed between the I-Rule 4.

What about this Loopa 2? Fixed roll 5 of Jr number and? ! +D
The movable rolls 6, the 4-cylinder 7 that supports these movable rolls 6, and the carriage 7 are connected to the looper 1'
．． It is mainly constituted by a carriage motor 9 which moves freely via VF and a carriage motor 9 via B.

The rotation speed of the 1-Year Ridge motor 9 is controlled by the tension control command T from the master control device 10 via the current control device 11 so that the tension of the steel (+Fi) in the looper 2 is constant. Note that the rotational speed of the 7-tower sogiator 9 at that time is detected by the speed detector 12 and manually inputted to the master control word;

On the other hand, the speed of the steel strip l in the entrance section is determined by the entrance bridle roll 3, and the speed in the center section is determined by the exit bridle roll 4. The speed of the roll roll 3.4 is the reference speed given from the master controller IO, that is, the input and exit speeds 1 command V, , V,
Accordingly, each priddle motor 13.14 is controlled by a speed control device 15.16.

, 2: 1-Yarinojimoke 9 and) Ridermorph 13.14 are respectively controlled to predetermined line speeds and tensions based on commands from the main controller 10.

<Problems to be Solved by the Invention> However, if the steel strip l breaks inside the looper 2 or on its entry side as described above, the fifth
As illustrated in the figure, when a command is output from the master control device 10 to stop quickly, the inlet and outlet priddle 1 calls 34 cause the brake motors 13 and 14 to stop more quickly each time they are stopped. However, since the fixed roll 5 and the movable roll 6 in the looper 2 are not provided with a driving source, there is no mechanical loss of their shafts, so they can stop rapidly due to the large inertia of the steel strip l. I can't.

As a result, the steel (iF) inside the looper is moved to the exit side of the looper and remains in the vicinity of the exit bridle roll 4, causing a problem in which secondary fractures occur there. This is more noticeable when the line speed is faster.

In order to prevent such problems, conventionally, as shown in FIG.
17 is provided and an air cylinder 18 is used to press the steel strip l against the surface of the fixed roll 5. However, even in this method, the pressure on the steel strip 1 by the brake shoe 17 cannot be made uniform. Trouble [? : Because of this, there is still a great risk that the steel strip l will be biased and cause secondary fracture.

Furthermore, recently, motors with brakes are attached to the fixed rolls 5 to drive them individually and also to enable rapid stopping. There is a problem in that as the equipment ages, a large amount of equipment and maintenance costs are required.

An object of the present invention is to provide a looper control method that solves the above problems.

Means for Solving the Problems> The present invention provides a method for storing copper strips that are wound around and stored between a plurality of fixed rolls and a plurality of movable rolls that are supported by a movable carriage. In the looper control tff1 method, in which the sheet is threaded while applying a predetermined tension by an entry side bridle roll and an exit side bridle roll, a disk brake-1 row roll is used as the fixed roll, and each The actual speed of the fixed rolls is detected and compared with the base ill speed of each fixed roll calculated in advance, and when the actual speed is faster than the standard speed, the disc blade is operated according to the threading speed of the copper strip. 7 is a method for controlling a looper, which is characterized by slowing down and stopping the fixed roll.

According to the present invention, the fixed roll provided in the looper is equipped with a disc brake, and its rotational speed is compared with a reference speed, and when the rotational speed exceeds the reference speed,
By activating the disc brake and applying deceleration torque to the fixed roll, the fixed roll was rotated almost in sync with the threading speed of the line, thereby preventing secondary breakage as the copper strip moved toward the exit side of the looper. It can be prevented.

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

FIG. 1 is a block diagram showing a 4QW according to an embodiment of the method of the present invention. Components that are the same as those in the conventional example are given the same reference numerals, and their new explanation will be omitted here.

As shown in this figure, a fixed roll 5A with a disc brake is used as the fixed roll 5 in the looper 2, and a fluid pressure supply pipe 19 is connected to each disc brake, and a jlyJI! The fixed roll 5A is decelerated and stopped by opening and closing the IT valve 20 according to commands from the master valve control system 010.

In addition, a speed detection device 2 is provided on each axis of the fixed roll 5A.
321 is attached, and the signal of the actual speed of the fixed roll 5A detected by this speed detector 2I is inputted to the master control device 10, respectively.

To explain in detail the fixed roll 58 of the disk brake = t-(;I, as shown in FIG. 2, a disk 52 is attached to one side of its shaft 51, and this y''
Brake pieces 53 are provided on both sides of the isk 52 so as to be freely in contact with a fluid cylinder 54 .

When the control valve 20 is opened in response to a deceleration/stop command output from the master control device 10, the fluid pressure supply pipe 19
Fluid pressure is supplied to the fluid cylinder 54 through the brake cylinder 54, which presses the brain blade pieces 53 against both sides of the disk 52 to perform a brake function, thereby decelerating and stopping the fixing rod 58.

Next, the function of controlling the speed of the fixed roll 5A in the main controller IO will be explained.

First, the reference speed V of each fixed roll 5A is calculated in the master control device 1Y10.

Now, the fixed roll 5△ placed inside the looper 2 and the movable roll I
If the total number of I-rules 6 is n, then the number of strands is n
-It will be 1 piece. Therefore, if the standard speed of the inlet bridle roll 3 is ■, and the standard speed of the outlet bridle roll 4 is ■, then 7J ill! of the first fixed roll 5 A i counting from the input side of the looper 2. The speed VS+ can be determined using the following equation (1).

Next, the actual speed Vl11 of the first fixed roll 5Ai detected by the speed detector 21 is compared with the reference speed ■□ produced by the above formula 0), and the difference is, for example, 1 of VSt.
It is determined whether the speed is faster than 0% using the following equation (2). That is, ■R1Vit> 0.1 ・Vit −−−−−
----12) Then, if the relationship in equation (2) above is established, a signal to close the disc brake is output to the fixed roll 5Ai.

When the control valve 20 is opened by this signal, fluid pressure is supplied to the fluid cylinder 54 of the disc brake 4-, and the play piece 53 is pressed against the disc 52, so that the fixed roll 5Δi is moved as shown in FIG. The vehicle is decelerated and stopped.

In this way, for all the fixed rolls 5A, the above (1)
) and (2), the deceleration and stopping of all the fixed rolls 5A can be controlled.

As a result, even if, for example, a plate breakage occurs in the steel strip l in the looper 2 and a quick stop command is issued from the master controller i71 device 10, the fixed roll 5 in the louver 2 and the It is no longer the case that only the movable roll 6 continues to rotate, and these rolls can run at almost the same speed as the line threading speed.
It can be stopped at a reduced speed.

In addition, it is expected that the effect of the disc brake is too strong and the fixed roll 5A is likely to stop earlier than the input/output side bridle roll 34.
If the actual speed of each fixed roll 5Δ is determined at t o, and it is determined that the condition of equation (2) is not satisfied, the disc brake is automatically turned off and the speed of each fixed roll 5A is always set to (2). There is no problem since the operation satisfies the condition of the expression.

<Effects of the Invention> As explained above, according to the present invention, the fixed [1-ru] provided in the looper is equipped with a disc brake, and the actual speed is determined by comparing its actual speed with the base speed. When the speed exceeds the standard speed, the disc brake is activated to apply deceleration torque to the fixed roll, so that the fixed roll decelerates and stops almost in sync with the line threading speed, thereby suppressing fixed roll overrun. This makes it possible to prevent secondary breakage due to the movement of the copper strip to the exit side of the looper, thereby reducing product yield and maintenance costs.
It is possible to suppress second elevation and the like.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an overview of an embodiment of looper control according to the method of the present invention, FIG. 2 is a front view showing an embodiment of a fixed roll used in the method of the present invention, and FIG. 3 is a block diagram showing an example of looper control according to the method of the present invention. An explanatory diagram showing the stopped state of the fixed roll in response to a speed command when the method is applied, Fig. 4 shows the IQ requirement of a conventional example of looper control in a continuous process line, and Fig. 5 shows a conventional example. FIG. 6 is a perspective view showing an example of a conventional fixed roll stopping means. ■... Steel strip 9 2... Loopa. 3... Entrance bridle roll. 4... Exit bridle roll. 5A...Fixed roll, 6...Movable roll 7...
-1- Yaridge, 8... Loopa drum. 9... Carriage motor, 10... Main controller 11... Current control word; η, 12... Speed detector 1
3, 14...Pridle [-ri 15, 16...Speed control device, 19...Fluid pressure supply pipe 20...AlT1 control valve 3 2T...Speed detector 52...Disk, 53 ...Brake piece 54...
Human body cylinder ゛, P...) ゛L1 cess. Patent issued 19 J1 Kawasaki Steel Corporation Figure 1 Miya 2 Figure 37 Time Figure 4 Speed command diagram

Claims (1)

[Claims] The area that is stored by being wound around a plurality of fixed rolls and a plurality of movable rolls supported by a movable carriage is stored in a predetermined manner by an entry side bridle roll and an exit side bridle roll provided before and after the fixed rolls. In a method for controlling a looper that threads a sheet while applying tension, a roll with a disc brake is used as the fixed roll, and the actual speed of each fixed roll during threading is detected, and the speed of each fixed roll calculated in advance is A method for controlling a looper, which is compared with a reference speed, and operates a disc brake in accordance with the threading speed of the steel strip to decelerate and stop the fixed roll when the actual speed is faster than the reference speed.