JPS62286618A - Looping device in strip processing equipment - Google Patents

Abstract

PURPOSE:To reduce the variation in a strip tension and to prevent the rupture, etc., by performing the necessary operation for preventing the variation in a loop tension from each strip traveling speed of the loop inlet and outlet sides and controlling the loop car driving by this arithmetic value and the detection value of the loop car speed. CONSTITUTION:The traveling speed of the strip 10 of the loop inlet side is detected by a detector 16, the traveling speed of the strip 10 of the loop outlet side is detected by a detector 18 and each detection value is inputted into a computing element 20. The tension of the strip 10 of the loop outlet side is detected by a tension meter 19. The computing element 20 operates the necessary moving direction, movement amount and moving speed of the mobile type loop car 12 cancelling the variation in the length variation rate(tension) of the loop from the output signal of detectors 16, 17 and from these arithmetic values and the speed value of the loop car 12 detected by the detector 14, the target moving speed and moving direction of the loop car 12 are operated. This arithmetic value is then outputted to a control device 22, the driving device of the loop car 12 is controlled and the tension variation of the strip 10 is reduced.

Description

[Detailed description of the invention]

3. Detailed description of the invention

INDUSTRIAL APPLICATION FIELD 1 The present invention relates to improvements in looping devices in strip processing equipment. [Prior art 1] A looping Vt device for storing a strip such as a steel strip in a loop shape is used as shown in FIG. 5, as shown in FIG.
and a strip reversing roll consisting of a louver roll 3, and the looper roll 3 are mounted on an axis, and the deflector roll 2
a loop car 4 that can move toward and away from the loop car 4; a traction device 5 that pulls the loop car 4 in a direction to increase the tension on the strip 1 formed into a loop by the strip reversing roll 2.3; Tension meter 5A that measures the tension of
It is composed of. The traction device 5 has a wire 6 whose one end is routed around the loop car 4 and whose other end is attached to a winding drum 7, which will be described later.
The winding drum 7 winds up the wire 6 and pulls the loop car 4, and the drive device 8 rotates the winding drum 7. The drive device 8 outputs a constant torque, so that the loop car 4 is stopped at a position corresponding to the tension of the strip 1. Furthermore, an inlet prydle roll 9A and an outlet prydle roll 9B are disposed 2 on the inlet and outlet sides of the looping device, respectively. The strip 1 is fed into the looping device by the inlet pry roll 9A, and the strip 1 in the looping device is sent to the Vit position for the next process by the outlet pry roll 9B. . If a fluctuation occurs in the running speed of the strip 1 on the input side priddle roll 9A and the output side priddle roll 9B, the loop car 4 moves in a self-balancing manner to a position commensurate with the constant torque of the drive device 8. By this,
The system between the tension of the strip 1 and the traction force of the loop car 4 is kept in equilibrium. In addition, as the loop control I device of the looping device, as disclosed in Japanese Patent Application Laid-Open No. 50-90855,
The acceleration/deceleration of each section is calculated based on the section speed reference signal before and after the material storage device, and the acceleration/deceleration compensation signal given to the loop car is calculated, and the loop tension at the time of acceleration/deceleration of each section is calculated by this acceleration/deceleration compensation signal. A method has been proposed in which the electric motor of the loop car is controlled so as not to fluctuate. [Problems to be solved by the invention] However, in the conventional looping device,
When the looper roll 3 and the loop car 4 increase the looping amount due to the difference in running speed of the strip 1 between the entry and exit side priddle rolls 9A and 9B, that is,
Distance 111 between the deflector roll 2 and the louver roll 3
1. When f2 becomes large or when the looping amount is decreased, that is, when the distance β becomes small, etc.
Strip 1 corresponding to the inertia of loop car 4 itself
Therefore, the tension of the strip 1 changes greatly. Therefore, the nature of the strip 1 is that it is a very brittle material;
For example, in the case of high-grade silicon steel plates or thin vinyl strips that can break under minute tension, even a slight change in the tension of the strip 1 corresponding to the inertia of the loop car 4 itself will cause the line to stop, especially when reducing the amount of looping. There is a problem in that the connected strip 1 may break. OBJECT OF THE INVENTION 1 The present invention has been made in view of the above-mentioned conventional problems. That is, this method was developed based on the fact that the cause of the strip tension fluctuation in the conventional looping device is that the loop car 4 is driven by an external drive method. SUMMARY OF THE INVENTION An object of the present invention is to provide a looping device for a strip processing facility that can store strips in a loop while keeping the tension constant even for strips to which even small tension fluctuations are not desired. (Means for Solving the Problems 1) The present invention provides a self-propelled loop car (hereinafter referred to as a loop car) that changes the length of the loop of a strip and a speed detector that detects the speed of the loop car. a speed detector that detects the running speed of the strip on the loop entry side;
A speed detector for detecting the running speed of the strip on the exit side of the loop, and a necessary moving direction and amount of movement of the loop car to eliminate fluctuations in the loop length change rate of the loop from the output signals of both speed detectors of the strip. Calculate the moving speed,
an operator that calculates the target speed and movement direction of the self-propelled loop car based on these calculated values and an output signal from the speed detector of the self-propelled loop car; and an output from the calculator. The above object is achieved by comprising a control device that controls the drive device of the self-propelled loop car based on a signal. [Function] In the present invention, a self-propelled loop car is provided, and the necessary moving direction and movement port of the loop car are provided to eliminate the tension fluctuation of the nrJ loop from the running speed of the strip on the loop entry side and the running speed of the strip on the loop exit side. and the moving speed, calculate the target moving speed and moving direction of the loop car based on these calculated values and the output signal from the speed detector of the loop car, and control the loop car based on the result of this a calculation. , the tension fluctuation of the strip can be reduced. As a result, even if the strip is made of a very brittle material or a material that easily breaks due to minute tension, the material can be stored in a loop while preventing accidents such as strip breakage.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 4, this embodiment includes a self-propelled loop car 12 that can change the length of the loop of the strip 10, a speed detector 14 that detects the speed of this loop car 12, A speed detector 16 that detects the running speed of the strip 10 on the loop entry side, a speed detector 18 that detects the running speed of the strip 10 on the loop exit side, and a strip tension meter 19 that detects the tension of the strip 10. From the output signals of the respective speed detectors 16 and 18, the required movement direction and movement direction of the loop car 12 to eliminate the loop length change rate fluctuation (tension change k)+) of the loop are calculated, and these are calculated. a computing unit 20 that computes the target moving speed and moving direction of the self-propelled loop car 12 from the computed value of and the output signal of the speed detector 14;
and a control device 22 for controlling the drive device. As shown in FIGS. 2 and 3, the loop car 12 includes a bogie 2 equipped with wheels 26 that run on rails 24.
8, a looper roll 30 that is pivoted on this trolley 28,
A driven sprocket 34 attached to the axle 32 of the wheel 26, a motor 36 attached to the truck 28, a driving sprocket 38 attached to the drive shaft of the motor 36, and a space between the driven sprocket 34 and the driving sprocket 38. 114 The position detector 14 is composed of a pulse generator attached to the motor 36. The reference numeral 42 in the figure indicates a pulse generator installed in the looping device. An inlet prydle roll 42 is shown for feeding the strip 10. In addition, reference numeral 44 in the figure indicates an outlet prydle roll for feeding the strip 10 in the looping device to the next process device.The speed detector 16 and 18 are attached to each of these priddle rolls 42 and 44. Also, in the figure, 46 does not indicate a deflector roll that is mounted on the shaft so that it does not move inside the looping device. H320Lt, +if notation] Based on the strip speed detection signal from the fU detector 16.18, the moving direction of the loop car 12 and the moving speed of each loop car 12 are calculated based on the difference between the two speeds, and this calculation p value and the moving speed of each loop car 12 are calculated. The target moving speed and moving direction of the loop car 12 are calculated based on the speed detection signal output from the speed detector 14 of the loop car 12, and this moving speed signal is output to the control device 22. Fig. 4 shows an example of actual signal processing in the input/output strip running speed detector 16.
By adding the speeds from 18 and then dividing by the number of strands of the looping equipment (6 in this example), 1/2 of the loop speed change per loop car can be obtained. This corresponds to the required movement speed of a short loop car. Next, use the calculated value and the current moving speed of the loop car (
(detected value by the speed detector 14), and the proportional circuit P and the integral circuit 1 calculate the proportional/integral control υ output based on the determined difference. - Find the difference between the measured tension and the target tension from one tension detector, and use the proportional circuit P and the integral circuit I to calculate the proportional and integral outputs (direct) for this difference. The added value of the calculated value is output to the control device 22 as the target movement speed.
By performing proportional/integral/derivative control instead of IIl, the accuracy of tension control 2II can be further improved. Next, the operation of this embodiment will be explained. The strip 10 is unwound by the input priddle roll 42 and fed to the loop car 12. The running speed of this strip 10 is detected by a speed detector 16, and this detection signal is input to a calculator 20. On the other hand, the strip 10 is discharged by the output side priddle roll 44 to a device for the next process. At this time, the running speed of the strip 10 on the exit side priddle roll 44 is detected by the speed detector 18, and the detection signal is sent to the computing unit 2.
It is input to 0. Further, the position of each loop car 12 is detected by a speed detector 14, and this speed detection signal is input to the arithmetic unit 20. Here, if there is no speed difference between the running speeds of the strip 10 on the inlet side prydle roll 42 and the outlet side plydle roll 44, the loop car 12 is under constant tension control (not shown). Also, the strip 10 on the entry side priddle roll 42
When the traveling speed of the loop car 12 decreases, the loop car 12 moves to the left in FIG. 1 so that the tension of the strip 10 in the looping device does not change, and the distance β between the deflector roll 46 and the loop car 12 is reduced. At this time, the loop car 12 is
is speed-controlled via the arithmetic unit 20 and control device 22 until the loop increase/decrease is resolved. According to this embodiment, the required moving direction, amount of movement, and moving speed of the loop car 12 to eliminate the tension fluctuation of the loop are calculated from the running speed of the strip 10 on the loop entry side and the running speed of the strip 10 on the loop exit side. By controlling the speed of the loop car 12 based on the target moving speed which is the result of the calculation, fluctuations in the tension of the strip 10 can be reduced. That is, in the conventional looping device, the loop car can be driven by traction vl in the direction in which the distance β between the deflector roll and the louver roll increases, that is, in the direction in which the loop mother increases. wiλ
In the direction in which the distance between the relubes decreases and the distance between the relubes decreases, the loop car can only be moved by the tension of the strip 10, which has the problem of increasing the fluctuation in the tension of the strip. However, this can be resolved. Therefore, even if the strip is made of a very brittle material or a material that easily breaks due to minute tension, accidents such as strip breakage can be prevented and the material can be stored in a loop. Next, the implementation results of this example will be explained. In this example, 0
．． 4-6. Approximately 5m circumference with a steel strip usage range of On plate thickness
With a looper of ℃, for a strip with a plate thickness of 0.4n, conventionally the setting tension is 0.5~1.0kg/I12.
Although the tension fluctuation was 1.0 kg/m2, in this example, the tension fluctuation could be reduced to 0.1 kg/m2 or less. In the embodiment, the target moving speed of the loop car 12 is calculated using the tension value signal from the strip tension meter 19 filmed on the input side of the exit side priddle roll 44 during the calculation by the N calculator 20. Although a further effect of reducing tension fluctuations is obtained by correcting, the present invention is not limited to this, and this target moving speed correction step may be omitted. Further, the tension of the strip may be detected by a tension meter installed on the deflector roll 46. Effects of the Invention 1 Since the present invention is configured as described above, it is possible to reduce tension fluctuations in the strip, thereby preventing strip breakage, etc. even for strips to which small tension fluctuations are not desired. This has an excellent effect in that the strip can be stored in a loop shape.

[Brief explanation of the drawing]

FIG. 1 is a side view including a partial block diagram showing an embodiment of a looping device in a strip processing facility according to the present invention, FIG. 2 is a side view showing a loop car in the same embodiment, and FIG. 3 is a side view showing a loop car in the same embodiment. Figure 4 is a block diagram showing the configuration of the arithmetic unit in the same embodiment; Figure 5 is a front view;
The figure is a side view showing a conventional looping system with eight positions. DESCRIPTION OF SYMBOLS 10...Strip, 12...Loop car, 14.16.18...Speed detector, 20...Arithmetic unit, 22...Control device, 42.44...Pridle roll, 46...・Deflector roll. Agent Kei Matsuyama Yu' Takaya Ron Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] (1) A self-propelled loop car that can change the loop length of the strip, a speed detector that detects the speed of the self-propelled loop car, and a speed detector that detects the running speed of the strip on the loop entry side; A speed detector for detecting the running speed of the strip on the exit side of the loop, and a necessary moving direction and amount of movement of the loop car to eliminate fluctuations in the loop length change rate of the loop from the output signals of both speed detectors of the strip. A computing unit that computes a moving speed and computes a target moving speed and a moving direction of the self-propelled loop car based on these computed values and an output signal from a speed detector of the self-propelled loop car, and this computing unit. A control device for controlling a drive device of the self-propelled loop car using an output signal from the looping device.