JP3308757B2 - Meandering correction method and device for metal strip - Google Patents

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 correcting meandering of a metal strip in a continuous line for processing a metal strip such as a steel strip having a vertical looper facility.

[0002]

2. Description of the Related Art In a continuous processing line of a metal strip (hereinafter, described as an example of a steel strip) for pickling, cold rolling, continuous annealing, continuous plating, etc., a line during operation in a section for performing continuous processing is stopped. If there is a coil, a looper facility is installed at the entrance and exit of the line as a steel strip storage facility.For example, when a coil is received, the steel strip accumulated in the entrance looper facility is installed inside the line. Supply to
When dispensing the coil on the outlet side, the steel strip in the line is stored in the looper equipment on the outlet side, so that the steel strip can be continuously processed even if the equipment stops on the inlet and outlet sides of the line. Is common.

[0003] Fig. 5 shows an example of a configuration of an inlet portion of a continuous steel strip processing line. 1 is a vertical looper facility, 3 is a pay-off reel, 4 is a welder for connecting a coil, 5 is a pretreatment facility for washing and the like, 6 is a tension leveler, and 7 is an annealing furnace.
An example of a vertical looper facility is described in JP-A-5-329523, which will be described with reference to FIG. 11 is a vertical rail, 12 is a looper carriage, rail
It is guided vertically by 11 and moves up and down. Although not shown in the figure, a looper roll is attached to the looper carriage 12, and a steel strip S is passed over the looper roll. 14
Is a wire rope that suspends the looper carriage 12, 15 is a hoisting drum that winds it up, and 19 is a proximity switch that detects the position of the looper carriage 12.

Meanwhile, in a continuous processing line for a steel strip, the line length tends to increase in recent years with an increase in the line speed, and the problem of the meandering of the steel strip has recently become apparent. The meandering of the steel strip can be classified into those caused by the equipment and those caused by the original plate. The causes of the equipment are caused by deviation of the horizontality and perpendicularity of the roll, one-sided wear of the roll, one-sided reduction of the roll, and the like. In particular, in the case of a looper facility in which the looper carriage is pulled by a wire rope, the inclination of the carriage due to the extension of the wire rope also affects the meandering. On the other hand, the cause of the original plate is that the tension distribution in the width direction becomes uneven due to poor flatness of the steel plate. Since it is impossible to eliminate both these equipment factors and original plate factors at the current technical level, in the continuous processing line, for example, the edge position of the steel strip is detected so that the meandering can be corrected to some extent, and the drive roll is changed. Device for correcting meandering by tilting (CPC, Center Position Control
l) is being provided.

FIG. 7 shows an example of the meandering correction device. 18 is a steel strip edge position detector consisting of a transmitter and a receiver, 21
Is a drive roll, 22 is a roll mount, and 23 is an operation cylinder. The amount of deviation from the center of the steel strip S is detected by an edge position detector 18 installed near both edge positions of the steel strip S, and this is converted into an electric signal and instructed to the operation cylinder 23, and the roll mount 22 is moved. The amount of meandering is corrected by inclining in the direction of arrow a in the horizontal plane.

[0006]

However, in a facility such as a looper in which the number of meandering straightening rolls is limited due to the space of the facility and the roll span is long, meandering of the steel strip becomes apparent, and the The belt was disengaged from the roll barrel, leading to breakage. SUMMARY OF THE INVENTION An object of the present invention is to provide a meandering correction method and apparatus for a steel strip that effectively corrects meandering in a vertical looper facility having a long roll span.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a method for correcting meandering of a metal strip in a vertical looper facility, comprising the steps of: providing a metal loop on at least one of an entrance side and an exit side of a vertical looper facility installed in a continuous processing line of metal strips; The meandering amount of the strip is detected, and based on the detection result, the lengths of the four wire ropes suspending the looper carriage of the vertical looper facility are individually adjusted to tilt the looper carriage in the width direction of the metal strip. It is characterized by.

The meandering correction device for a metal strip in the vertical looper equipment according to the present invention is a vertical looper equipment installed in a continuous processing line for metal strips. At least one of the metal strip meandering amount detectors is provided, and four wire ropes suspending the looper carriage of the vertical looper facility are connected to separate winding drums and motors, so that the lengths can be individually adjusted. It is characterized by the following.

[0009]

According to the present invention, in a vertical looper facility having a long roll span in which a meandering is likely to occur in a steel strip, the meandering amount of the steel strip is detected and the length of a wire rope suspending the looper carriage is adjusted. Then, the looper carriage is automatically tilted to correct the meandering of the steel strip in the looper, thereby eliminating the trouble caused by the meandering.

[0010]

An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing a vertical looper facility of the embodiment, and FIG.
Is a plan view, FIG. 3 is a side view, S is a steel strip, 10 is a fixed roll, 12 is a looper carriage that moves up and down, 13 is a looper roll attached to the looper carriage 12, and 14 is a wire rope that suspends the looper carriage 12. , 15 is a winding drum for winding the wire rope 14, 16 is a motor, 17 is a control device, and 18 is an edge position detector.

The steel strip S comprises a fixed roll 10 and a looper carriage.
The steel strip is alternately stretched between the looper roll 13 attached to the loop 12 and the length of the steel strip stored during the vertical movement of the looper carriage 12. The looper carriage 12 is suspended at its four corners by wire ropes 14, and each of the four wire ropes 14 is connected to a separate winding drum 15 and a motor 16 for driving the same. In the plan view of FIG. 2, if the four motors 16a to 16d operate simultaneously and cooperatively, the looper carriage 12 moves up and down while maintaining the horizontal position. However, a pair of motors in the width direction of the steel strip S, for example, 16a When 16b moves individually or in the opposite direction, the looper carriage 12 tilts in the width direction of the steel strip S. The tilted state is shown in the side view of FIG. That is, in FIG. 3, when it is detected by the edge position detector 18 that the steel strip S meanders to the right, if the left winding drum 15b is wound while the right winding drum 15a is stopped, the looper The carriage 12 is raised to the left, the parallelism between the fixed roll 10 and the looper roll 13 is lost, and the meandering of the steel strip S is shifted to the left as indicated by the arrow.

In the present invention, a meandering amount detecting device, for example, an edge position detector 18 similar to that shown in FIG. 7 is provided at a position sandwiching at least one of the steel strips S on the entrance side and the exit side of the vertical looper equipment 1. In accordance with the amount of meandering detected, the control device issues a command in a direction to correct the meandering, individually controls the motors, adjusts the amount of winding of the wire rope 14 to incline the looper carriage 12, and Correct the meander.

FIG. 4 is a graph showing the operation results of this embodiment. Conventionally, a deviation of about 90 mm was generated in the looper, but the present invention has made it possible to suppress the deviation to 10 mm or less.

[0014]

According to the present invention, the trouble caused by the meandering of the steel strip has been solved, and the steel strip can stably enter the subsequent annealing furnace. It has an excellent effect of improving productivity.

[Brief description of the drawings]

FIG. 1 is a front view of a vertical looper facility showing an embodiment of the present invention.

FIG. 2 is a plan view of a vertical looper facility showing an embodiment of the present invention.

FIG. 3 is a side view of a vertical looper facility showing an embodiment of the present invention.

FIG. 4 is a graph showing the effect of the embodiment of the present invention.

FIG. 5 is a configuration diagram showing a part of a continuous steel strip processing line according to the present invention.

FIG. 6 is a perspective view showing a conventional example of a vertical looper facility.

FIG. 7 is a perspective view showing a conventional example of a meandering correction device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical looper equipment 2 Meandering correction device 3 Payoff reel 4 Welder 5 Pretreatment equipment 6 Tension leveler 7 Annealing furnace 10 Fixed roll 11 Rail 12 Looper carriage 13 Looper roll 14 Wire rope 15 Winding drum 16 Motor 17 Control device 18 Edge position detector (Meandering detector) 19 Proximity switch 21 Drive roll 22 Roll mount 23 Operation cylinder S Steel strip

Continuation of the front page (51) Int.Cl. ⁷ Identification code FI B65H 23/032 B65H 23/032 23/038 23/038 Z C21D 9/56 101 C21D 9/56 101F 11/00 105 11/00 105 C23G 3 / 02 C23G 3/02 C25D 7/06 C25D 7/06 N (56) References JP-A-4-365745 (JP, A) JP-A-2-127320 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) B21C 49/00 B21B 39/14 B21B 41/00 B65H 23/032 B65H 23/038

Claims (2)

(57) [Claims] 1. A meandering amount of a metal strip is detected on at least one of an entrance side and an exit side of a vertical looper facility installed in a continuous processing line of metal strips, and based on the detection result, the vertical looper facility is controlled. A meandering correction method for a metal strip in a vertical looper facility, wherein the length of four wire ropes suspending the looper carriage is individually adjusted to tilt the looper carriage in the width direction of the metal strip. 2. A vertical looper facility installed in a continuous processing line for metal strips, wherein at least one of an entrance side and an exit side of the vertical looper facility (1) is provided with a meandering amount detector (18) of the metal strip. 4 to suspend the looper carriage (12) of the vertical looper facility.
Book wire rope (14) with separate winding drum (15)
A meandering correction device for a metal strip in a vertical looper facility, wherein the length can be adjusted individually by connecting to a motor and a motor (16).