JPH11256246A - Method for monitoring meandering in strip continuous treating line and device for monitoring meandering - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily grasp the passing-through condition of a strip with an operator by outputting the outputs from at least a part of plural meandering detecting devices as an integral information based on the number of positions at which the meanderings are detected. SOLUTION: The outputs of four meandering detecting sensors 12a-12d in meandering detecting device 7-1 are supplied to a meandering deciding circuit 14-1. The other meandering detecting devices 7-2-7-7, are also executed as the same way. The output of each of the meandering deciding circuits 14-1-14-7 is supplied to an individual displaying device 15 and displayed. Further, the displayed result in the individual displaying device 15 is integrated and displayed on an integral displaying device 16 as the integral information based on the number of the positions at which the meanderings are detected. In the integral displaying device 16, an operator monitors the switch-on condition of lamps and then, the line speed of a strip can be decided as an index, e.g. when the blue lamp switches on, the line speed is raised, when the yellow lamp switches on, the line speed is just as it is and when the red lamp switched on, the line speed is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a meandering monitoring method and a meandering monitoring apparatus in a continuous processing line for a strip material, for example, a continuous annealing line for a steel strip.

[0002]

2. Description of the Related Art Conventionally, a metal strip such as a steel strip is degreased,
In processing equipment that performs continuous processing such as cleaning, plating, and annealing, for example, CPC (Cent
er Position Control) and other meandering correction devices
The passing plate position, which has been off-centered due to meandering of a steel strip or the like, is automatically returned to the center of the line. However, if the threading speed is inappropriate in relation to the shape of the steel strip and the line tension, etc., these facilities cannot sufficiently prevent off-centering due to meandering, and cause major troubles such as breakage of the steel strip. May occur. Therefore, it is usual that a television camera or a meandering sensor is installed in each part of the line, and the occurrence state of such meandering is constantly monitored by the operator.

In such a continuous processing line such as a continuous annealing furnace for a steel strip, a technique for partially automating the line speed has been conventionally developed. However, the line speed of the entire continuous processing line or each part thereof has been developed. Is manually controlled by the operator.
This is because, in a continuous steel strip processing line, meandering factors such as poor shape of the steel strip fluctuate. This is because the operator must comprehensively judge various situations and correct the line speed appropriately so as not to evolve. In addition, in the recent continuous annealing furnace processing line, equipment such as pre-treatment and post-treatment is being added one after another, which tends to be longer, so the trouble monitoring information that the operator must pay attention to at once increases. I am doing it.

[0004]

Meanwhile, with respect to meandering, which is one of the troubles in the continuous processing line for steel strips, normally, regardless of the installation of the meandering straightening device, the meandering from the entry side to the exit side of the line is performed. Monitoring is required at a number of locations, and the number of locations requiring monitoring is increasing with the length of the line. However, since the frequency of meandering at each monitoring location and the severity of the effect on the line are not always equal, even if the meandering information at each monitoring location is displayed in one place, these individual information with different weights are displayed. It is not easy for even a skilled operator to grasp the situation instantaneously by listing.

As described above, conventionally, it is difficult to sufficiently monitor the meandering, so that it is necessary to operate at a low line speed at which the meandering is reduced, and the steel sheet is deflected to one side due to significant meandering. As a result, there is a problem that productivity is significantly reduced.

The present invention has been made in view of such a conventional problem, and a first object of the present invention is to allow an operator to easily grasp the passing state of a band-shaped material in a continuous processing line. An object of the present invention is to provide a meandering monitoring method in a continuous strip material processing line in which an operator can quickly and appropriately correct a line speed and improve productivity.

Further, a second object of the present invention is to provide a meandering monitoring apparatus in a continuous processing line for a strip material, which is appropriately configured so that the above meandering monitoring method can be implemented simply and inexpensively.

[0008]

In order to achieve the first object, a method for monitoring meandering in a continuous processing line for strips according to the present invention includes a meandering detection device at a plurality of locations along the continuous processing line for strips. When monitoring the meandering of the band-shaped material by installing the device, the outputs from at least some of the meandering detection devices are output as integrated information based on the number of locations where the meandering is detected. Things.

Further, in order to achieve the second object,
The meandering monitoring device in the continuous processing line of the band-shaped material according to the present invention includes a meandering detection device installed at a plurality of locations along the continuous processing line of the band-shaped material, and outputs from at least some of the meandering detection devices. Means for outputting as integrated information based on the number of locations where meandering is detected. In the above-mentioned means for achieving the first and second objects, when integrating information based on the number of locations where the meandering is detected, weighting is performed according to the position where the meandering is detected and the degree of the meandering. Performing the operation is also included in the present invention.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. In this embodiment, meandering of the steel strip from the cleaning section on the entry side to the exit side of the looper in the continuous annealing line of the cold-rolled steel strip is monitored. Therefore, the first cleaning section (No. 1C
L) No. 1 between the first scrubber section (No. 1 SCR) 2 composed of scrubber rolls, No. 1 SCR 2 and the second cleaning section (No. 2 CL) 3, No. 2
Meandering between CL3 and second scrubber section (No. 2 SCR) 4, between No. 2 SCR 4 and power washer section (PW) 5 for spraying washing water, and between PW 5 and looper 6 Detection device 7-1 to 7
In addition to -5, meandering detection devices 7-6 and 7-7 are provided at appropriate two places on the line in the looper 6.

As shown in FIG. 2, each meandering detecting device has:
In the axial direction of the roll 10, that is, in the width direction of the steel strip 11, positions corresponding to both ends of the roll 10, and positions inside by predetermined amounts from both ends, for example, the roll 10.
Where L is the width of the steel strip 11 and W is the width of the steel strip 11 (L−W) / 4
The meandering detection sensors 12a to 12d are provided at a total of four positions. Each meandering detection sensor is configured by a simple sensor, for example, a PX sensor using eddy current or a so-called PH sensor using light.

In the meandering detection device 7-1, the outputs of the four meandering detection sensors 12a to 12d are amplified by amplifiers 13a to 13d and supplied to the meandering determination circuit 14-1, as shown in FIG. Other meandering detection devices 7-2 to 7
-7, the four meandering detection sensors 12a
To 12d are amplified by amplifiers 13a to 13d, respectively, and supplied to the corresponding meander determination circuits 14-2 to 14-7. In FIG. 3, illustration of the meandering detection devices 7-2 to 7-6 is omitted.

The outputs of the meandering determination circuits 14-1 to 14-7 are supplied to an individual list display device 15 and displayed. In this embodiment, the individual list display device 15 includes the meandering detection device 7.
Blue, yellow, and red lamps are provided corresponding to the installation locations of -1 to 7-7, respectively.
Each of the meandering detection sensors 12a to 12d has the steel strip 1
If it is determined that the normal state is not detected, the blue lamp at the corresponding installation location is turned on, and only one of the two meandering detection sensors 12b and 12c on the inside detects the steel strip 11. When the state is determined, the yellow lamp is turned on, and the two outer meandering detection sensors 12a and 12d are turned on.
If any of the above is determined to be in a warning state in which the steel strip 11 is detected, the red lamp is turned on.

The display results of the individual list display device 15, that is, the outputs of the meandering determination circuits 14-1 to 14-7 of the meandering detecting devices 7-1 to 7-7 are integrated to obtain the location of the location where the meandering is detected. Integrated display device 1 as integrated information based on the number
6 is displayed. In this embodiment, the integrated display device 16
Similarly, blue, yellow, and red lamps are provided.
As shown in (1), if at least one red lamp is lit (warning state) in seven places of the individual list display device 15, the red lamp is lit, and if at least one yellow lamp is lit (caution state), The yellow lamp is turned on, and the blue lamp is turned on if the blue lamp is turned on in all seven places (normal state).

Therefore, according to this embodiment, the lighting state of the lamp of the integrated display device 16 is monitored by the operator. For example, if the blue lamp is on, the speed is increased, and if the yellow lamp is on, the speed is increased. If the status quo is maintained and the red lamp is lit, the line speed can be determined using the index of speed reduction as an index.

In the above description, the red lamp of the integrated display device 16 is illuminated if at least one red lamp is illuminated at seven locations on the individual list display device 15.
For example, as shown in FIG. 5, in the individual list display device 15, if all seven places are blue lamps, blue, if one red lamp is one, yellow, two red lamps, and up to two yellow lamps. When there are two yellow and red lamps and three or more yellow lamps, and when there are three or more red lamps, the red lamps can be turned on.

In integrating the display results from the individual list display device 15, the number of meandering locations is simply summed up and the total value is displayed on the integrated display device 16, or the meandering detection devices 7-1 to 7-1 are displayed. The display results are weighted as shown in Table 1 according to the frequency of meandering at the installation location of 7-7 and the severity of the influence on the line, and the total value or line speed correction information based on the total value is given. May be displayed on the integrated display device 16.

[Table 1]

Here, as the line speed correction information based on the total value, for example, when the total value is 0, the speed can be increased;
When 2, the speed can be increased slightly; when 3 to 5, the speed is maintained;
9 can be displayed as slow deceleration, and 10 to 18 can be displayed as deceleration. This makes it possible to correct the line speed more appropriately.

FIG. 6 shows a second embodiment of the present invention. In this embodiment, a continuous annealing line of a cold-rolled steel strip is schematically shown in the drawing at each speed, and an inlet-side cleaning line 21, an inlet-side looper 22, a furnace 23, an outlet-side looper 24, and an outlet It is divided into five blocks of the side adjustment / inspection line 25, and each block is provided with a plurality of meandering detectors 26 along the respective lines, and the outputs of the meandering detectors 26 of all the blocks are integrated stepwise. The meandering of the steel strip is monitored. Each meandering detection device 2
6 has the same configuration as that described in the first embodiment.

For this reason, the outputs of the plurality of meandering detection devices 26 of each block are output to the corresponding individual block display device 27-.
1 to 27-5 so that the corresponding blue, yellow, and red lamps are turned on according to the determination result, similarly to the individual list display device 15 of the first embodiment. The number of installation locations of the meandering detection device 26 is, for example, 15 in the inlet cleaning line 21, 8 in the inlet looper 22, 18 in the furnace 23, 9 in the outlet looper 24, and 9 in the furnace 23. In the exit-side refining / inspection line 25, the number is 20.

Individual block display devices 27-1 to 27-5
Are integrated and supplied to the primary integrated display device 28 as primary integrated information based on the number of locations where meandering is detected. The primary integrated display device 28 is provided with, for example, blue, yellow, and red lamps corresponding to each block, and turns on a required lamp based on the integration result of each block. Further, the display results of each of the primary integrated display devices 28 are integrated and supplied to the final integrated display device 29 as final integrated information based on the number of locations where the meandering is detected. The final integrated display device 29 is provided with, for example, blue, yellow, and red lamps, and turns on required lamps based on the integration result of each block.

Here, the integrated display on the primary integrated display device 28 and the final integrated display device 29 can be performed in the same manner as described with reference to FIGS. The threshold values of the caution state (yellow) and the warning state (red) can be changed every time. In addition, the integrated display on the primary integrated display device 28 or the final integrated display device 29 is such that, instead of displaying blue, yellow, and red lamps, simply sum the number of meandering locations and display the total value, or The information to be integrated may be weighted as shown in Table 1, and the total value thereof or the line speed correction information based on the total value may be displayed.

According to this embodiment, the line speed of each block can be corrected based on the display result of the primary integrated display device 28, and the speed of the entire line can be adjusted based on the display result of the final integrated display device 29. It can be modified.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified or modified. For example, the output format of the integrated information is such that a sound / automatic alarm is issued instead of or in combination with the above-described blue, yellow, and red lamp display, numerical display, and line speed correction information display. You can also. In addition, the present invention is not limited to the case where the outputs of all the meandering detection devices are integrated, but is also effectively applied to the case where the outputs of some of the meandering detection devices are integrated, for example, at locations where the meandering frequency is low. The present invention can be effectively applied to meandering monitoring not only in a continuous annealing line of steel strip but also in a continuous processing line of various strips. The number of outputs from the meandering detection device to be integrated is not particularly limited. However, the effect of the present invention is considerably obtained by integrating three or more outputs, and the effect is particularly large when seven or more outputs are integrated.

[0025]

As described above, according to the present invention, the outputs from at least some of the meandering detection devices are output as integrated information based on the number of locations where the meandering is detected. An operator can easily grasp the passing state of the strip material in the continuous processing line. Therefore, it is possible for the operator to quickly and appropriately correct the line speed, so that productivity can be significantly improved. In addition, since the meandering detection device and the means for outputting as integrated information can be realized with a simple configuration, they can be implemented simply and inexpensively.

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating an example of an arrangement of sensors of the meandering detection device illustrated in FIG. 1;

FIG. 3 is a diagram showing a configuration of a main part of the meandering monitoring device in the embodiment shown in FIG. 1;

FIG. 4 is a diagram for explaining an example of integrated display on the integrated display device shown in FIG. 3;

FIG. 5 is a diagram for explaining another display example.

FIG. 6 is a diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 first cleaning section 2 first scrubber section 3 second cleaning section 4 second scrubber section 5 power washer section 6 looper 7-1 to 7-7 meandering detection device 10 roll 11 steel strip 12a to 12d meandering detection sensor 13a to 13d Amplifiers 14-1 to 14-7 Meandering judgment circuit 15 Individual list display device 16 Integrated display device 21 Inlet-side cleaning line 22 Inlet-side looper 23 Inside furnace 24 Outlet-side looper 25 Outlet-side refining / inspection line 26 Meandering detecting device 27- 1-27-5 Individual block display device 28 Primary integrated display device 29 Final integrated display device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C25F 7/00 C25F 7/00 V

Claims (2)

[Claims] When a meandering detecting device is installed at a plurality of locations along a continuous processing line of a strip and the meandering of the strip is monitored, the meandering detects an output from at least a part of the plurality of meandering detecting devices. A meandering monitoring method in a continuous processing line for a strip-shaped material, wherein the integrated information is output as integrated information based on the number of performed locations. 2. A meandering detector installed at a plurality of locations along a continuous processing line of a strip, and outputs from at least some of the plurality of meandering detectors are integrated based on the number of locations where the meandering is detected. Means for outputting information as information. A meandering monitoring device in a continuous strip material processing line.