JPH10263694A - Method for unwinding band like body coil and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To largely make the restricting efficiency of meandering even at a time of tailing off from a payoff reel, and to precisely realize the stopping position of a tail end of a steel strip inside a welding machine. SOLUTION: When a coil like steel strip wound on a payoff reel 1 is supplied to a side trimmer 7 by continuously unwinding while it is welded by a welding machine 4, an intermediate pinch roll 12 being able to roll down and to open and an inclining roll 20 being able to incline to the vertical direction making the width direction of the steel strip as the axial direction are arranged orderly between the welding machine 4 and the side trimmer 7, during a normal unwinding, the intermediate pinch roll 12 is made in the opening state, at the time of the final end part of the steel strip being tailed off, the intermediate pinch roll is driven with rolling down, the back direction tension is applied to the band like body and the meandering of the band like body is restricted by the inclining roll 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for rewinding a strip coil.

[0002]

2. Description of the Related Art Generally, a strip-shaped steel sheet such as a stainless steel sheet unwound from a pay-off reel must have its widthwise position within a certain range at all times in order to stably perform a subsequent process such as trimming. It is important. By the way, it is well known that, in the process of transporting a strip-shaped steel sheet (hereinafter referred to as a steel strip), meandering is caused by a roll installation state, a pinch roll pressing state, a steel strip shape, and the like. Therefore, conventionally, between the payoff reel and the deflector roll, the amount of displacement of the steel strip in the width direction, that is, the meandering amount of the steel strip, is detected, and the position of the payoff reel is changed in the direction opposite to the meandering direction according to the meandering amount. The movement is controlled to correct the meandering.

FIG. 5 shows an example of this. Here, a first pinch roll 2, a leveler 3, a welding machine 4, a side guide 5, a second pinch roll 6, and a side trimmer 7 are provided downstream of the payoff reel 1. And payoff reel 1
After being connected by the welding machine 4, both ends of the steel strip S in the sheet width direction are cut by the side trimmer 7 and further conveyed downstream.

[0004] The amount of displacement of the steel strip S in the width direction is first detected by a first displacement sensor 8 a installed upstream of the first pinch roll 2, and the amount of displacement of the steel strip S upstream of the second pinch roll 6 is detected. also been detected in the second displacement sensor 8b, moves controlled payoff reel 1 in the plate width direction via a cascade manner position controller 10 to match the set value P _S in the rewinding controller 9, respectively, the Distance is a distance sensor
11 and is fed back to the rewind control device 9 (for example, see Japanese Patent Application Laid-Open No. 3-2888757). The function of correcting the meandering by adjusting the opening / closing distance of the side guide 5 according to the width of the steel strip S is also used.

In such a conventional example, the payoff reel 1
In a state where the steel strip S is sufficiently wound around
By adjusting the gain or the like in the position control device 10 with respect to the displacement in the width direction of the steel strip S, that is, the meandering, the position of the payoff reel 1 can be appropriately controlled with good responsiveness. The meandering of S can be corrected.

[0006]

However, the steel strip S
If the winding end of the steel strip S is loosened by one or two turns at the tail end or if the tail end of the steel strip S is completely separated from the payoff reel 1, the meandering correction function of the position control device 10 described above is used. Becomes invalid. Further, when the tail end of the steel strip S is removed from the payoff reel 1, for example, the rear tension of the steel strip S from the side trimmer 7 is lost and the tail end swings, and the steel strip S
The possibility of the meandering is extremely large, and there is no means for correcting the meandering.

In the meandering correction method using the side guides 5, positioning is performed with a margin of about 5 to 10 mm from the widthwise end of the steel strip S in consideration of the difference between the nominal width and the actual width of the steel strip S. Therefore, it becomes 10 to 20 mm wider than the board width. In such a state, there is no effect when the meandering range of the steel strip S is small. Further, when the allowance is reduced, when the thickness of the steel strip S is small, the steel strip S is broken at the end in the width direction, which is a quality problem.

The present invention solves the above-mentioned problems of the prior art, and can greatly enhance the meandering suppression effect even when the pay-off reel comes off the bottom, and at the tail end stop position of the steel strip in the welding machine. It is an object of the present invention to provide a method and an apparatus for rewinding a strip-shaped coil, which can realize the above-described method with high accuracy.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a strip coil wound on a pay-off reel is continuously rewound while being joined by a strip joining apparatus, and supplied to a strip processing facility disposed downstream. At this time, between the band bonding apparatus and the band processing equipment, an intermediate pinch roll capable of rolling down and opening and a tilting roll capable of tilting in the vertical direction without the width direction of the band being the axial direction are arranged in order. During the normal rewinding, the intermediate pinch roll is opened, and when the trailing end of the band-shaped coil comes off, the intermediate pinch roll is driven down to apply rearward tension to the band, and the belt is rotated by the tilting roll. This is a method of rewinding a band-shaped coil, characterized by suppressing meandering of the body.

[0010] The present invention also relates to a belt-shaped coil that is continuously wound back while being joined by a belt-joining device and fed to a band-shaped processing equipment disposed downstream. A rewinding device, wherein the intermediate pinch rolls which can be pressed and released and which are sequentially disposed between the band bonding apparatus and the band processing equipment and the width of the band are set in the axial direction and tilted in the vertical direction. A possible tilting roll, and an intermediate pinch for releasing the intermediate pinch roll during normal rewinding and driving the intermediate pinch roll down to apply a rearward tension to the band when the end of the band coil comes off. Roll control device, a tilting roll position control device that suppresses the meandering of the band by the tilting roll,
A strip-shaped coil rewinding device comprising: a bottom-out sensor that detects a bottom-out of a coil end portion attached to the payoff reel.

In the present invention, it is preferable to use a vector inverter for driving the intermediate pinch roll.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic diagram showing an embodiment of the present invention. The same members as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted. In this figure, reference numeral 12 denotes an intermediate pinch roll disposed downstream of the welding machine 4, the opening of which is adjusted by a pressure reduction cylinder 13, and rotated by an intermediate pinch roll drive motor 14.

[0013] 15 is an intermediate pinch roll control device for controlling the intermediate pinch rolls 12, the number of turns set value N _S and the speed setting value V _S, tension set value T _S are respectively set.
The intermediate pinch roll control device 15 also includes a rotation speed sensor 16 attached to the intermediate pinch roll drive motor 14.
Detection signals are input from a line speed sensor 17 attached to the first pinch roll 2 and a winding number sensor 19 attached to the payoff reel drive motor 18, respectively. Then, the intermediate pinch roll control device 15 outputs an opening / closing command to the screw-down cylinder 13 and a speed command or a tension control command to the intermediate pinch roll drive motor 14, respectively.

Reference numeral 20 denotes a tilting roll disposed downstream of the intermediate pinch roll 12, and a steel strip S via a tilting roll operation cylinder 22 by a tilting roll position control device 21 operated by a command signal from a rewinding control device 9. The width direction is set to be the axial direction and is controlled to be tiltable in the vertical direction. The amount of tilt of the tilting roll 20 is detected by the distance sensor 23 and is fed back to the tilting roll position control device 21.

FIG. 2A shows an example of a tilting mechanism of the tilting roll 20. As shown in FIG. As shown, the tilting roll 20 is
It is rotatably supported by a housing 25 supported by a pin 24 serving as a fulcrum, and is rotated by a tilting roll operation cylinder 22.
It can be tilted around the center. Then, as shown in FIG. 2 (b), by tilting the tilting roll 20 by a predetermined angle θ, a force of F acts on the steel strip S to suppress meandering.

Reference numeral 26 denotes a timer, which controls the intermediate pinch roll drive motor 14 from the speed control mode after a predetermined time (time until the intermediate pinch roll 12 completes rolling down) in the intermediate pinch roll control device 15. It has a function to switch to the control mode. Reference numeral 27 denotes a load current sensor for detecting a load current of the pay-off reel drive motor 18, which is used as a bottom-out sensor utilizing the phenomenon that the load current suddenly falls when the steel strip S falls out of the pay-off reel 1.
Note that the load current sensor 27 can similarly detect the loosening of the steel strip S that occurs immediately before the hip is removed.

[0017] The intermediate pinch of the present invention configured as described above.
The operation of the roll 12 and the tilting roll 20 will be described with reference to FIG.
And will be described below. (1) First, set the intermediate pinch roll control device 15 to the speed control mode.
Keep the mode. (2) Payoff based on detection signal from winding number sensor 19
The number of turns of the coil of the reel 1 is the set number of turns N_SReached
Is determined. (3) The number of turns is the set number of turns N_SWhen it gets smaller
To start the intermediate pinch roll drive motor 14. (4) The rotation speed of the intermediate pinch roll drive motor 14 is
The rotation speed is detected by the line speed sensor 17
It is determined whether the line speed is synchronized with the detected line speed. (5) Speed setting value V_SAt the time
Output a signal to the screw-down cylinder 13 to pinch the steel strip S
After a predetermined time set in the timer 26, the intermediate pin
The tyrole controller 15 is set to the tension control mode, and the steel strip S
Tension is the tension set value T _SMiddle pinch low to match
The rotation speed of the motor 14 is controlled. This allows steel
A rear tension can be applied to the band S. (6) The rewinding control device 9 is a payoff reel drive motor 1
Monitoring the current signal of the load current sensor 27 of FIG.
It is determined whether or not the payoff reel 1 has been pulled out. (7) Payoff reel drive motor 18 load current sensor 27
When the current signal detected at
It is determined that the obi S has slipped out of the payoff reel 1 and
The return control device 9 issues a tilt command to the tilt roll position control device 21.
Is output via the tilting roll operating cylinder 22
By tilting the nozzle 20, the meandering is suppressed. (8) Check whether the tail end of the steel strip S has stopped in the welding machine 4.
judge. (9) When the tail end of the steel strip S stops in the welding machine 4, the pressure
Activate the lower cylinder 13 to release the intermediate pinch roll 12,
The intermediate pinch roll drive motor 14 is stopped. (10) Then, move the tilting roll operation cylinder 22 to the normal position.
After resetting, the tilting roll 20 is centered.

The use of a vector inverter as the intermediate pinch roll drive motor 14 enables high-accuracy speed control. Board thickness; 1.2mm
X Plate width: The method of the present invention was applied when rewinding a 1200 mm stainless steel strip. The results are shown in FIG. 4 (a).
It can be seen that the meandering amount is clearly suppressed as compared with the case of the conventional method of (b).

[0019]

As described above, according to the present invention,
An intermediate pinch roll is provided in the immediate vicinity of the welding machine to apply backward tension to the steel strip when the pay-off reel comes off, and a tilting roll is provided before the trimmer to adjust the tilting roll according to the meandering amount of the steel strip. Since the inclination is controlled, it is possible to suppress the meandering of the steel strip, which contributes to the improvement of the product yield.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

FIG. 2A is a front view of a tilting roll used in the present invention,
(b) It is explanatory drawing of an effect | action.

FIG. 3 is a flowchart illustrating an operation procedure of the present invention.

4A and 4B are characteristic diagrams of (a) when the present invention is applied and (b) a conventional example, respectively.

FIG. 5 is a schematic diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Payoff reel 2 1st pinch roll 3 Leveler 4 Welding machine (band-like body joining apparatus) 5 Side guide 6 2nd pinch roll 7 Side trimmer (band-like body processing equipment) 8a 1st displacement sensor 8b 2nd displacement sensor 9 Rewind control device 10 Position control device 11 Distance sensor 12 Intermediate pinch roll 13 Lowering cylinder 14 Intermediate pinch roll drive motor 15 Intermediate pinch roll control device 16 Speed sensor 17 Line speed sensor 18 Payoff reel drive motor 19 Turn sensor 20 Tilt Roll 21 Tilt roll position control device 22 Tilt roll operating cylinder 23 Distance sensor 24 Pin 25 Housing 26 Timer 27 Load current sensor (Bad end sensor) S Steel strip (Strip)

Claims (3)

[Claims] 1. A band bonding apparatus for connecting a band coil wound on a pay-off reel to a band processing apparatus disposed downstream by continuously rewinding the coil while bonding the coil to the band processing apparatus. Between the machine and the strip processing equipment
An intermediate pinch roll that can be opened and a tilting roll that can tilt in the vertical direction without the width direction of the band as the axial direction are arranged in order,
During the normal rewinding, the intermediate pinch roll is opened, and when the trailing end of the band-shaped coil comes off, the intermediate pinch roll is driven down to apply rearward tension to the band, and the band is rotated by the tilting roll. A method of rewinding a strip-shaped coil, characterized in that meandering of the strip is suppressed. 2. A strip coil rewinding device for continuously rewinding a strip coil wound on a pay-off reel while joining it with a strip joining apparatus and supplying the strip coil to a strip processing facility disposed downstream. An intermediate pinch roll, which is sequentially arranged between the strip bonding apparatus and the strip processing equipment, and which can be pressed and released, and a tilt roll which can tilt in the vertical direction without the width direction of the strip being axial. An intermediate pinch roll control device that opens the intermediate pinch roll during normal rewinding and applies a rearward tension to the band by driving down the intermediate pinch roll when the end of the band-shaped coil comes off. A tilting roll position control device that suppresses the meandering of the belt-like body by the tilting roll, a trailing edge missing sensor that detects a trailing edge of a coil end portion attached to the payoff reel, Unwinders of the strip coil, characterized in that it includes. 3. The rewinding device for a band-shaped coil according to claim 2, wherein a vector inverter is used as the driving means of the intermediate pinch roll.