JP2020171936A - Rolling system operator support device and cold tandem rolling system comprising same - Google Patents

Abstract

To avoid in advance a rolling trouble caused by a portion large in amount of off-center.SOLUTION: An operator support device is applied to a rolling system 1 comprising a cold tandem rolling mill 16. In the operator support device, a tensile force, which is applied to a rolled material WK, is so made as to be smaller than that at a first location P3 where a first off-center measuring device 15 is located. This operator support device comprises: a third off-center measuring device 12 which is located at a second location P2 on an upstream side with respect to a first centering device 14 and on a downstream side with respect to the second off-center measuring device 11, and measures an amount of off-center of the rolled material WK; and an output part 23 which outputs data on the visualized amount of off-center measured by the third off-center measuring device 12 in rear time (graph G).SELECTED DRAWING: Figure 1

Description

The present invention relates to an operator assisting device for a rolling system and a cold tandem rolling system including the device.

As a technique for correcting meandering of a rolled material (strip) in cold tandem rolling, for example, Patent Document 1 describes a first stand and its method in a method for correcting meandering of a strip at the entrance of a first stand of a tandem cold rolling mill. The distance L (m) between the upstream meandering correction devices and the strip tension σ (kgf / mm ² ) applied between the first stand and the meandering correction device are arranged so as to satisfy σ × L ≧ 20. A method for correcting meandering of a characteristic strip is disclosed.

Japanese Unexamined Patent Publication No. 5-228521

If the rolled material is rolled with a camber (horizontal bend), or if the rolled material is welded with a deviation in the width direction and rolled in a dogleg shape, the rolled material meanders. Off-center needs to be modified. The off-center of the rolled material is corrected by the centering device. Since the magnitude of the meandering of the rolled material correlates with the magnitude of the off-center amount of the rolled material, the degree of meandering of the rolled material can be determined by the off-center amount of the rolled material. However, it has been found that even if the off-center of the rolled material is corrected, a rolling meandering trouble (for example, the rolled material is torn off) may occur due to a portion where the amount of off-center is large. Hereinafter, the off-center of the rolled base material (rolled material before rolling) will be referred to as "off-center", and the off-center of the rolled material after rolling and the non-symmetrical situation in the width direction will be described as "meandering".

An object of the present invention is to provide an operator assisting device for a rolling system and a cold tandem rolling system including the device, which can avoid rolling troubles caused by a portion having a large off-center amount in advance. ..

The operator support device for the rolling system according to the first aspect of the present invention is arranged in a cold tandem rolling mill that cold-rolls the rolled material sent while applying tension, and upstream of the cold tandem rolling mill. A first centering device that corrects the off-center of the rolled material in order to prevent the rolling material from meandering, and a first centering device that is arranged downstream of the first centering device, and the off-center is corrected by the first centering device. A first off-center measuring device for measuring the off-center amount of the rolled material and a second off-center measuring device for the rolled material, which is arranged upstream of the first centering device and modifies the off-center of the rolled material in order to prevent meandering of the rolled material. A rolling system including a centering device and a second off-center measuring device which is arranged downstream of the second centering device and measures the amount of off-center of the rolled material whose off-center has been corrected by the second centering device. In the operator assist device, the tension applied to the rolled material is smaller than that of the first location where the first off-center measuring device is arranged, and the tension applied to the rolled material is smaller than that of the first centering device. A third off-center measuring device and a third off-center measuring device, which are located upstream and downstream of the second off-center measuring device and measure the amount of off-center of the rolled material. It is provided with an output unit that outputs data that visualizes the amount of off-center measured by.

The present inventors created the present invention based on the following findings. Among the parts of the rolled material where the off-center amount was large, there was a part where the off-center amount was forcibly reduced by the elastic deformation of the rolled material (hereinafter referred to as the elastically deformed part), and the elastically deformed part was rolled. It turns out that sometimes rolling troubles can occur.

The amount of off-center is reduced in the elastically deformed portion by modifying the off-center (latent off-center), but the amount of off-center is increased in the elastically deformed portion when the deformation is restored (actualization of off-center). When the tension acting on the rolled material is small and the distance from the centering device is small, the elastically deformed portion returns to its original deformation and the off-center amount becomes large.

Therefore, the rolled material whose off-center has been corrected by the centering device is separated from the centering device and the tension applied to the rolled material is small before reaching the cold tandem rolling mill. All you have to do is measure the amount. At that location, the off-center of the elastically deformed portion is actualized (the off-center is visualized), so that the operator can find the elastically deformed portion before the elastically deformed portion reaches the cold tandem rolling mill.

In the operator support device of the rolling system according to the first aspect of the present invention, the second point is a place where the off-center becomes apparent, and the third off-center measuring device is arranged at the second place to measure the amount of off-center of the rolled material. Measure. The output unit outputs data that visualizes the amount of off-center measured by the third off-center measuring device in real time. By looking at this data, the operator can find the elastically deformed portion before it reaches the cold tandem rolling mill, and can take measures to prevent rolling troubles.

As described above, according to the operator assist device of the rolling system according to the first aspect of the present invention, it is possible to avoid rolling troubles caused by a portion having a large off-center amount in advance.

In the above configuration, the second portion is applied to the rolled material 25 m or more upstream from the first rolling stand of the cold tandem rolling mill and 25 m or more downstream from the second centering device. This is a place where the tension is 3.0 kgf / mm ² or less.

This configuration is a specific example of the second part. This is determined based on the rolling system of the present inventors. The second part satisfies the first condition and the second condition. The first condition is that there is a second portion 25 m or more upstream from the first rolling stand of the cold tandem rolling mill. As a result, when the operator becomes aware of the existence of the elastically deformed portion, it is possible to secure the time required to take an appropriate response before this portion reaches the first rolling stand.

The second condition is a location 25 m or more downstream from the second centering device and the tension applied to the rolled material is 3.0 kgf / mm ² or less. This is because, in order for the latent off-center to become apparent, it must be sufficiently separated from the centering device and the tension applied to the rolled material must be small.

In the above configuration, a first notification unit for notifying when the absolute value of the off-center amount measured by the third off-center measuring device exceeds a predetermined first threshold value is further provided.

With this notification, the operator can take measures in advance to avoid rolling troubles caused by elastically deformed portions of the rolled material.

In the above configuration, a second notification unit for notifying when the absolute value of the slope of the graph showing the off-center amount measured by the third off-center measuring device exceeds a predetermined second threshold value is further provided.

With this notification, the operator can take measures in advance to avoid rolling troubles caused by elastically deformed portions of the rolled material.

The cold tandem rolling system according to the second aspect of the present invention is arranged in a cold tandem rolling mill that cold-rolls the rolled material sent while applying tension, and upstream of the cold tandem rolling mill. A first centering device that corrects the off-center of the rolled material in order to prevent meandering of the rolled material, and a first centering device that is arranged downstream of the first centering device and whose off-center is corrected by the first centering device. A first off-center measuring device for measuring the off-center amount of the rolled material and a second centering which is arranged upstream of the first centering device and corrects the off-center of the rolled material in order to prevent the rolled material from meandering. An apparatus, a second off-center measuring apparatus arranged downstream of the second centering apparatus, a second off-center measuring apparatus for measuring the off-center amount of the rolled material whose off-center has been corrected by the second centering apparatus, and an operator assisting apparatus. In addition, the operator assisting device has a smaller tension applied to the rolled material than the first location where the first off-center measuring device is arranged, and the tension applied to the rolled material is smaller than that of the first centering device. A third off-center measuring device for measuring the amount of off-center of the rolled material, and a third off-center measuring device, which are located upstream and downstream of the second off-center measuring device. It includes an output unit that outputs data that visualizes the amount of off-center measured by the apparatus in real time.

The cold tandem rolling system according to the second aspect of the present invention defines the operator support device of the rolling system according to the first aspect of the present invention from the viewpoint of the cold tandem rolling system, and the first aspect of the present invention It has the same effect as the operator assist device of the rolling system.

According to the present invention, it is possible to avoid rolling troubles caused by a portion having a large amount of off-center in advance.

It is a schematic diagram which shows a part of the rolling system which concerns on embodiment. It is a block diagram of the operator support device which concerns on embodiment. 6 is graphs G-1 and G-2 showing an example of graph G showing off-center amounts V1, V2, V3, and output side tension difference V4. It is a flowchart explaining the operation of the operator support apparatus which concerns on embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the configurations with the same reference numerals indicate that they are the same configuration, and the description of the configurations already described will be omitted. In the present specification, when they are generically referred to, they are indicated by reference numerals without hyphens (for example, graph G), and when they refer to individual configurations, they are indicated by reference numerals with hyphens (for example, graph G-1).

FIG. 1 is a schematic view showing a part of the rolling system 1 according to the embodiment. The rolling system 1 is an example of a cold tandem rolling system, and is a system in which a rolled material WK to be rolled is automatically cold-rolled so as to have a predetermined target thickness (plate thickness). The rolling system 1 includes a centering device 10, an off-center measuring device 11, an off-center measuring device 12, a bridle roll 13, a centering device 14, an off-center measuring device 15, and a rolling mill 16.

The rolled material WK is fed in the direction of arrow A while being tensioned. The centering device 10, the off-center measuring device 11, the off-center measuring device 12, the bridle roll 13, the centering device 14, the off-center measuring device 15, and the rolling mill 16 are arranged in this order from the upstream of the rolling system 1.

The centering device 10 is an example of the second centering device, and the off-center amount of the rolled material WK measured by the off-center measuring device 11 is measured with respect to the rolled material WK sent from the upstream of this device while being tensioned. The off-center of the rolled material WK is corrected while adjusting the inclination of the centering device 10 in the width direction so that the off-center becomes smaller. Although not shown, an apparatus (for example, a bridle roll) for applying tension to the rolled material WK is arranged upstream of the centering apparatus 10.

The off-center measuring device 11 is an example of the second off-center measuring device, which is arranged downstream of the centering device 10 and measures the off-center amount V1 of the rolled material WK immediately after the off-center is corrected by the centering device 10. explain in detail. The off-center measuring device 11 detects the positions of the left and right side surfaces of the rolled material WK by using the light source unit that emits light from below the rolled material WK and the light emitted by the light source unit above the rolled material WK. A detection unit (for example, a linear sensor) is provided, and the off-center amount V1 is measured based on the detected positions of the left and right side surfaces.

The off-center measuring device 12 is an example of the third off-center measuring device, and is arranged at a point P2 (second place) downstream from the place P1 where the off-center measuring device 11 is arranged. The off-center measuring device 12 measures the off-center amount V2 of the rolled material WK at the point P2. The mechanism by which the off-center measuring device 12 measures the off-center amount is the same as that of the off-center measuring device 11.

At the location P2, the tension applied to the rolled material WK is the same (almost the same) as the location P1, but the tension applied to the rolled material WK is higher than that at the location P3 (first location) where the off-center measuring device 15 is arranged. The tension applied is small. The portion P2 must be a portion sufficiently separated from the centering device 10 and the tension applied to the rolled material WK is small.

The distance D1 between the off-center measuring device 12 and the centering device 10 is, for example, about 45 m. The distance D2 between the off-center measuring device 12 and the rolling mill 16 is, for example, about 85 m. The tension applied to the rolled material WK at the portion P2 (second portion) is, for example, 3.0 kgf / mm ² or less. The reasons for these will be explained later.

A bridle roll 13 is arranged downstream of the off-center measuring device 12. Since the tension applied to the rolled material WK decreases toward the downstream from the centering device 10, the bridle roll 13 applies tension to the rolled material WK.

A centering device 14 is arranged downstream of the bridle roll 13. The centering device 14 is an example of the first centering device, and corrects the off-center of the rolled material WK sent from the upstream of this device while being tensioned. The mechanism by which the centering device 14 corrects the off-center is the same as that of the centering device 10.

The off-center measuring device 15 is an example of the first off-center measuring device, which is arranged downstream of the centering device 14 and measures the off-center amount V3 of the rolled material WK immediately after the off-center is corrected by the centering device 14. The mechanism by which the off-center measuring device 15 measures the off-center amount is the same as that of the off-center measuring device 11.

A rolling mill 16 is arranged downstream of the off-center measuring device 15. The rolled material WK is sent to the rolling mill 16 after the off-center is corrected by the centering device 14. The rolling mill 16 is an example of a cold tandem rolling mill, and the rolled material WK is continuously rolled by arranging a plurality of (for example, five) rolling stands. FIG. 1 shows a rolling stand 161 (No. 1 stand) that first rolls a rolled material WK among a plurality of rolling stands.

The output side tension difference measuring device 162 is arranged downstream of the rolling stand 161 and measures the output side tension difference V4 of the rolled material WK immediately after being rolled by the rolling stand 161. explain in detail. The output side tension difference measuring device 162 is a first tension measuring device for measuring the tension of the work side side portion of the rolled material WK and a second tension measuring device for measuring the tension of the drive side side portion. The difference between the tension measured by the first tension measuring device and the tension measured by the second tension measuring device is the exit side tension difference V4. As will be described later, when the elastically deformed portion in which the off-center of the rolled material WK is latent is rolled, the output tension difference V4 becomes large. This indicates that a thrust force (force in the width direction) is acting on the rolled material WK.

FIG. 2 is a block diagram of the operator support device 2 according to the embodiment. The operator support device 2 supports the operator of the rolling system 1. The operator support device 2 includes a control processing unit 20, an IF unit 21, off-center measuring devices 11, 12, 15, an output side tension difference measuring device 162, an input unit 22, and an output unit 23.

The control processing unit 20 controls the entire operator support device 2 and performs control and processing necessary for the operation of the operator support device 2. The control processing unit 20 includes hardware such as a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and an HDD (Hard Disk Drive), and programs and data for executing control processing. It is realized by such as.

The IF unit 21 is a circuit that is connected to the control processing unit 20 and inputs / outputs data to / from, for example, an external device according to the control of the control processing unit 20. explain in detail. The IF unit 21 includes an off-center amount V1 measured by the off-center measuring device 11, an off-center amount V2 measured by the off-center measuring device 12, an off-center amount V3 measured by the off-center measuring device 15, and a outgoing side measured by the outgoing tension difference measuring device 162. The tension difference V4 inputs each in real time and sends them to the control processing unit 20.

The IF unit 21 is, for example, an interface circuit of RS-232C which is a serial communication method, an interface circuit using the Bluetooth (registered trademark) standard, an interface circuit using the USB (Universal Serial Bus) standard, and the like.

The input unit 22 is a device connected to the control processing unit 20 for the operator to input various information, data, commands and the like. The input unit 22 is realized by a plurality of input switches, keyboards, mice, touch panels, etc. to which predetermined functions are assigned.

The output unit 23 is a device connected to the control processing unit 20 and outputs commands, data, off-center amounts V1, V2, V3, and output side tension difference V4 input from the input unit 22 under the control of the control processing unit 20. is there. The output unit 23 is realized by a display device, a printer, or the like. The display device is, for example, a liquid crystal display or an organic EL display (organic electroluminescence display).

The output unit 23 has an off-center amount V1 measured by the off-center measuring device 11, an off-center amount V2 measured by the off-center measuring device 12, an off-center amount V3 measured by the off-center measuring device 15, and an output side measured by the output tension difference measuring device 162. The graph G showing the tension difference V4 is output in real time. Graph G is an example of data that visualizes these quantities. Graph G will be described in detail.

FIG. 3 is a diagram showing two examples of graph G (graphs G-1 and G-2). Graph G-1 is a graph G at a certain time t1. Graph G-2 is a graph G at a certain time t2, which is later than the time t1. The graph G is composed of a four-stage graph. The graph in the first row shows the off-center amount V1 measured by the off-center measuring device 11. The second-stage graph shows the off-center amount V2 measured by the off-center measuring device 12. The graph in the third row shows the off-center amount V3 measured by the off-center measuring device 15. The fourth graph shows the output tension difference V4 measured by the output side tension difference measuring device 162.

The vertical axis of the graph G shows the off-center amount V1, the off-center amount V2, the off-center amount V3, and the output tension difference V4, respectively.

The horizontal axis of the graph G indicates the distance with respect to the rolling stand 161 as a reference (0 m). The negative distance indicates upstream from the rolling stand 161. The positive distance indicates downstream from the rolling stand 161. The off-center measuring device 11 is located at a distance d1 from the rolling stand 161. The off-center measuring device 12 is located at a distance d2 from the rolling stand 161. The off-center measuring device 15 is located at a distance d3 from the rolling stand 161. The output tension difference measuring device 162 is located immediately after the rolling stand 161.

With reference to graph G-1, the ellipse indicates the elastically deformed portion WKp of the rolled material WK. This partial WKp is located at a distance of −50 m from the rolling stand 161. Since the off-center amount V1 is the off-center amount of the rolled material WK immediately after the off-center is corrected by the centering device 10, the off-center amount of the elastically deformed portion WKp is small (potential off-center).

On the other hand, the off-center amount V2 is measured at a position P2 away from the centering device 10 and where the tension applied to the rolled material WK is small. In the graph of the off-center amount V2, the absolute value of the slope of the elastically deformed portion WKp is large. This is because the deformation of the elastically deformed portion WKp has returned to its original state (off-center manifestation).

With reference to the graph G2, the rolled material WK advances about 50 m in the period from time t1 to time t2. Tension is applied to the rolled material WK by the bridle roll 13, and the off-center is corrected by the centering device 14. Therefore, the elastically deformed portion WKp is sent to the rolling stand 161 with the off-center amount V3 set to almost zero (off-center is latent).

In the graph G2, the elastically deformed portion WKp is in the position immediately after being rolled by the rolling stand 161. The tension difference V4 on the exit side of the elastically deformed portion WKp is large. This indicates that the thrust force (force in the width direction) acts by rolling the elastically deformed portion WKp that hides the off-center of the rolled material WK.

Whether or not it is the elastically deformed portion WKp is a portion where the absolute value of the off-center amount V2 is large, or a portion where the absolute value of the slope of the graph showing the off-center amount V2 is large even if the absolute value of the off-center amount V2 is not large. By monitoring the graph of the off-center amount V2, the operator can know the existence of the elastically deformed portion WKp before the elastically deformed portion WKp is rolled. This allows the operator to take appropriate action (eg, slow down the rolling speed, perform the leveling process, stop the rolling system 1). The reason for reducing the rolling speed is to minimize rolling troubles. If a rolling trouble occurs while the rolling speed remains high, the broken rolled material WK may collide with the work roll of the rolling stand 161 and be hand-rolled in multiple layers, and the treatment may be prolonged. For example, when the rolling speed is high, the time required for troubleshooting is 8 to 12 hours, and when the rolling speed is low, the troubleshooting time is 10 to 15 minutes.

Judgment as to whether or not the elastically deformed portion WKp can be performed automatically. In this case, the control processing unit 20 has a threshold value Th1 (predetermined first threshold value) of the off-center amount V2 and a threshold value Th2 (predetermined second threshold value) of the slope of the graph showing the off-center amount V2. The threshold value) is stored in advance, and whether or not the absolute value of the off-center amount V2 exceeds the threshold Th1 and whether or not the absolute value of the slope of the graph showing the off-center amount V2 exceeds the threshold Th2. To monitor. The control processing unit 20 notifies the output unit 23 when the absolute value of the off-center amount V2 exceeds the threshold value Th1 or when the absolute value of the slope of the graph showing the off-center amount V2 exceeds the threshold value Th2. Let me. As a result, the operator can know the existence of the elastically deformed portion WKp.

Even if the off-center amounts V1 and V3 are used, it is possible to determine whether or not the elastically deformed portion WKp is present in the same manner as the off-center amount V2.

The operation of the operator support device 2 according to the embodiment will be described. FIG. 4 is a flowchart illustrating this. With reference to FIGS. 1, 2 and 4, the operation of the rolling system 1 starts (S1). The off-center measuring device 11 measures the off-center amount V1, the off-center measuring device 12 measures the off-center amount V2, the off-center measuring device 15 measures the off-center amount V3, and the output side tension difference measuring device 162 measures the output side tension difference V4. Measure.

The control processing unit 20 receives the measured off-center amounts V1, V2, V3 and the output tension difference V4 using the IF unit 21 (S2). The control processing unit 20 generates a graph G (for example, the graph G shown in FIG. 3) showing the off-center amounts V1, V2, V3 and the output tension difference V4, and the output unit 23 outputs the graph G (S3). ..

The control processing unit 20 determines whether or not the absolute value of the off-center amount V2 exceeds the threshold value Th1 (first threshold value) (S4). When the control processing unit 20 determines that the absolute value of the off-center amount V2 exceeds the threshold value Th1 (Yes in S4), the output unit 23 notifies (S5). This is a notification to the operator that the absolute value of the off-center amount V2 exceeds the threshold value Th1.

When the control processing unit 20 determines that the absolute value of the off-center amount V2 is equal to or less than the threshold value Th1 (No in S4), the absolute value of the slope of the graph of the off-center amount V2 is the threshold value Th2 (second). It is determined whether or not the threshold value) is exceeded (S6). When the control processing unit 20 determines that the absolute value of the slope of the graph exceeds the threshold value Th2 (Yes in S6), the output unit 23 notifies (S7). This is a notification to the operator that the absolute value of the slope of the graph showing the off-center amount V2 exceeds the threshold value Th2.

Whether or not the rolling system 1 is operating when the control processing unit 20 determines that the absolute value of the slope of the graph is equal to or less than the threshold value Th2 (No in S6), or after the processing S5 or after the processing S7. Is determined (S8). When the control processing unit 20 determines that the rolling system 1 is operating (Yes in S8), the control processing unit 20 returns to the processing S2. When the control processing unit 20 determines that the operation of the rolling system 1 has stopped (No in S8), the control processing unit 20 terminates the operation of the operator support device 2.

In the process S5, the output unit 23 has the function of the first notification unit. In process S7, the output unit 23 has the function of a second notification unit. The first notification unit notifies when the absolute value of the off-center amount V2 measured by the off-center measuring device 12 exceeds the threshold value Th1 (first threshold value). The second notification unit notifies when the absolute value of the slope of the graph showing the off-center amount V2 measured by the off-center measuring device 12 exceeds the threshold value Th2 (second threshold value). As a result, the operator can take measures in advance to avoid rolling troubles caused by the portion where the off-center amount is large (elastically deformed portion WKp). The notification may be an image or a voice. In the case of voice, a speaker (not shown) provided in the output unit 23 serves as a first notification unit and a second notification unit.

Specific examples of the distance D1 and the distance D2 will be described with reference to FIG. These are determined based on the rolling system of the present inventors. In order for the latent off-center to become apparent, the portion P2 must be sufficiently distant from the centering device 10 and the tension applied to the rolled material WK must be small. The distance D1 is determined from this point of view. For example, the distance D1 is 25 m or more, and the tension applied to the rolled material WK at the portion P2 is 3.0 kgf / mm ² or less.

The distance D2 is determined from the viewpoint of ensuring the time required to take an appropriate response before the operator reaches the rolling stand 161 when the operator becomes aware of the existence of the elastically deformed portion WKp. For example, the distance D2 is 25 m or more.

1 Rolling system (cold tandem rolling system)
10 Centering device (second centering device)
11 Off-center measuring device (second off-center measuring device)
12 Off-center measuring device (third off-center measuring device)
13 Bridle roll 14 Centering device (first centering device)
15 Off-center measuring device (first off-center measuring device)
16 Rolling machine (cold tandem rolling machine)
161 Rolling stand 162 Out-side tension difference measuring device 2 Operator support device 23 Output unit (first notification unit, second notification unit)
D1 Distance between off-center measuring device 12 and centering device 10 D2 Distance between off-center measuring device 12 and rolling mill 16 P1 location P2 location (second location)
P3 location (first location)
V1 Off-center amount measured by off-center measuring device 11 V2 Off-center amount measured by off-center measuring device 12 V3 Off-center amount measured by off-center measuring device 15 V4 Outside tension difference WK Rolled material

Claims (5)

A cold tandem rolling mill that cold-rolls the rolled material sent while applying tension, and
A first centering device located upstream of the cold tandem rolling mill that modifies the off-center of the rolled material to prevent meandering of the rolled material.
A first off-center measuring device, which is arranged downstream of the first centering device and measures the off-center amount of the rolled material whose off-center has been corrected by the first centering device,
A second centering device located upstream of the first centering device and modifying the off-center of the rolled material to prevent meandering of the rolled material.
An operator assisting device for a rolling system including a second off-center measuring device arranged downstream of the second centering device and measuring the off-center amount of the rolled material whose off-center has been corrected by the second centering device. There,
The tension applied to the rolled material is smaller than that of the first place where the first off-center measuring device is arranged, and it is upstream of the first centering device and said. A third off-center measuring device, which is arranged at a second location downstream of the second off-center measuring device and measures the amount of off-center of the rolled material,
An operator assisting device for a rolling system, comprising an output unit that outputs data that visualizes the amount of off-center measured by the third off-center measuring device in real time. The tension applied to the rolled material is applied to the rolled material at the second portion 25 m or more upstream from the first rolling stand of the cold tandem rolling mill and 25 m or more downstream from the second centering device. The operator support device for a rolling system according to claim 1, wherein the content is 3.0 kgf / mm ² or less. The rolling according to claim 1 or 2, further comprising a first notification unit that notifies when the absolute value of the off-center amount measured by the third off-center measuring device exceeds a predetermined first threshold value. System operator assistance device. Claims 1 to further include a second notification unit that notifies when the absolute value of the slope of the graph showing the amount of off-center measured by the third off-center measuring device exceeds a predetermined second threshold value. The operator assisting device for the rolling system according to any one of 3. A cold tandem rolling mill that cold-rolls the rolled material sent while applying tension, and
A first centering device located upstream of the cold tandem rolling mill that modifies the off-center of the rolled material to prevent meandering of the rolled material.
A first off-center measuring device, which is arranged downstream of the first centering device and measures the off-center amount of the rolled material whose off-center has been corrected by the first centering device,
A second centering device located upstream of the first centering device and modifying the off-center of the rolled material to prevent meandering of the rolled material.
A second off-center measuring device, which is arranged downstream of the second centering device and measures the off-center amount of the rolled material whose off-center has been corrected by the second centering device,
Equipped with an operator support device,
The operator assist device
The tension applied to the rolled material is smaller than that of the first place where the first off-center measuring device is arranged, and it is upstream of the first centering device and said. A third off-center measuring device, which is arranged at a second location downstream of the second off-center measuring device and measures the amount of off-center of the rolled material,
A cold tandem rolling system including an output unit that outputs data that visualizes the amount of off-center measured by the third off-center measuring device in real time.

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