JP3439919B2 - Tension control bridle roll load sharing controller - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension control bridle roll load sharing control device for controlling load sharing of a bridle roll for controlling tension in a steel process line.

[0002]

2. Description of the Related Art FIG. 17 is a block diagram showing a conventional steel process line. In the drawing, 1 is a steel plate, 2 is an entrance side bridle roll (bridle roll), 3 is an inside bridle roll (bridle roll), Reference numeral 4 denotes an exit side bridle roll (bridle roll), and the steel plate 1 whose tension is controlled by each entrance side, middle side and exit side bridle rolls 2 to 4 is flowed to the exit side looper. In addition, the load sharing rate control of each of the entrance-side, middle-side, and exit-side bridle rolls 2 to 4 is performed by the tension ratio (T4 / T) between the steel plates 1 on the entrance and exit sides.
1) From each inlet, middle and outlet bridle roll 2
The complicated calculation for deriving the load sharing ratio of No. 4 was performed, and it was performed by controlling the current value supplied to the electric motors that drive the entrance-side, middle-side, and exit-side bridle rolls 2 to 4.

Next, the operation will be described. The ratio of loads to be shared by the entrance-side, middle-side, and exit-side bridle rolls 2 to 4 shown in FIG. 17 is obtained. The friction coefficient μ required for the step between the entrance side tension T1 and the exit side tension T4 is θ for the winding angles of the entrance side, middle side and exit side bridle rolls 2 to 4, respectively.
1, θ2 and θ3,

[Equation 1] Becomes Bridle rolls 2 on each side
Loads L1 to L3 to be shared by

[Equation 2] Therefore, the ratio of the loads L1 to L3 and the total load to be shared by each of the entrance-side, middle-side, and exit-side bridle rolls 2 to 4, that is, the load sharing ratio,

[Equation 3] Therefore, as described above, the load sharing rate is calculated from the tension ratio (T4 / T1) of the steel plates 1 on the input side and the output side by a calculation formula.

[0004]

Since the conventional tension control bridle roll load sharing control device is configured as described above, the tension ratio (T4 / T) between the steel plates 1 on the input side and the output side is calculated.
1) From each inlet, middle and outlet bridle roll 2
Since a complicated calculation for deriving the load sharing ratio of 4 was performed, there was a problem that the processing time on software became enormous and the output responsiveness deteriorated. When the tensions on the inlet side and the outlet side are equal (T1 = T4), the calculation formula (7)-
In (9), since the denominator is 0, it is necessary to perform processing to be avoided on software, which causes a problem of increasing processing time on software. Furthermore, when a roll slip occurs on each of the entrance side, middle side and exit side bridle rolls 2 to 4, the load balance is lost, so tension fluctuations occur before and after each entrance side, middle side and exit side bridle rolls 2 to 4. There was a problem such as occurrence of.

The present invention has been made in order to solve the above problems, improves output responsiveness, and easily outputs an appropriate load sharing rate even when the tensions on the input side and the output side are equal. It is also an object of the present invention to provide a tension control bridle roll load sharing control device that corrects the load sharing rate so as to automatically apply a load to a bridle roll that has not rolled even if a roll slip occurs.

[0006]

According to a first aspect of the present invention, there is provided a tension control bridle roll load sharing control device, wherein a load sharing rate is applied to each bridle roll according to a tension ratio between an entrance side and an exit side of the bridle roll. , A load sharing controller that controls the load sharing on each bridle roll based on the data pattern set in the converter, and the roll of the bridle roll.
Slip is detected and the roll slipped bridle roll
According to the data pattern set in the converter corresponding to the
Load sharing rate or load sharing rate calculated by the subtractor
Is set to 0, and the load applied to each of the other bridle rolls
According to the ratio of the load sharing ratio,
The load sharing rate of the installed bridle roll
It is equipped with a genuine device .

A tension control bridle roll load sharing control apparatus according to a second aspect of the present invention is a function generator which sets a data pattern based on a function of a tension ratio and a load sharing rate applied to each bridle roll. It is what

A tension control bridle roll load sharing control apparatus according to a third aspect of the present invention is a bridle roll other than one bridle roll. Each bridle other than one bridle roll according to the tension ratio between the entrance side and the exit side of the bridle roll. A converter that sets the load sharing ratio of the rolls as a data pattern, and the sum of the load sharing ratios of all the bridle rolls minus the sum of the load sharing ratios of each bridle roll other than one bridle roll. A subtractor that takes the remaining load value as the load sharing ratio of one bridle roll, and a load that controls the load sharing ratio applied to each bridle roll based on the data pattern set in the converter and the load sharing ratio calculated by the subtractor. It is provided with a sharing controller.

According to a fourth aspect of the present invention, in the tension control bridle roll load sharing control device, the load sharing rate calculated by the load sharing rate or the subtracter according to the data pattern set in the converter corresponding to the bridle roll which slipped is rolled. The rate is set to 0, and a compensator is provided to share the load sharing rate of each of the other bridle rolls with the load sharing rate of the bridle roll that slips according to the load sharing rate.

In the tension control bridle roll load sharing control device according to the invention of claim 5, roll slip occurs.
Selected by the manual operation Lube ride Ruroru, etc.
To choose or transfer to the corrector of the bridle roll of the first
It is equipped with a selector.

[0011] invention tension control bridle roll load sharing controller according to claim 6, wherein detects bridle roll which roll slip in response to the decrease in the current value supplied to the electric motor for driving the bridle roll, which Bly A second selector for selecting the dollar roll or transmitting it to the corrector is provided.

A tension control bridle roll load sharing control apparatus according to a seventh aspect of the present invention detects a bridle roll that has slipped according to a change in roll peripheral speed value of each bridle roll, and selects which bridle roll .
Or a third selector for transmitting to the corrector.

In the tension control bridle roll load sharing control device according to the present invention, the current value supplied to the electric motor driving each bridle roll is reduced and the roll peripheral speed value of each bridle roll is changed. depending detects bridle roll which roll slip, but with a fourth selector for instruction the fourth selector for transmitting the or corrector choice of which bridle <br/> Ruroru.

According to a ninth aspect of the present invention, in the tension control bridle roll load sharing control device, the difference between the roll peripheral speed value of each bridle roll detected by the pulse generator and the plate speed detected by the plate speed detector is calculated. According to the fifth selector, a bridle roll slipped according to the roll is detected and which bridging roll is selected is transmitted to the corrector.

According to a tenth aspect of the present invention, in the tension control bridle roll load sharing control device, the difference between the roll peripheral speed value of each bridle roll detected by the laser speedometer and the plate speed detected by the plate speed detector. According to the above, a sixth selector is provided which detects a bridle roll which has slipped and transmits which bridle roll is selected to the corrector.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Reference examples and embodiments of the present invention will be described below. Reference example 1. FIG. 1 is a configuration diagram showing a tension control bridle roll load sharing control device according to a reference example 1 of the present invention. In FIG. 1, 11 is a tension ratio (T4 / T4 / T4) from the tensions T1 and T4 of the steel plates 1 on the inlet side and the outlet side. T1) divider, 12a to 12c
Is based on the calculation formulas (7) to (9) of the tension ratio and the load sharing ratios of the entrance-side, middle-side and exit-side bridle rolls (bridle rolls) 2 to 4, and It is a function generator (converter) that sets the load sharing rate applied to the side, middle side and exit side bridle rolls 2 to 4 as a data pattern.

Reference numerals 13a to 13c denote electric motors for driving the entrance-side, middle-side and exit-side bridle rolls 2 to 4, and 14a to 1c.
4c is a current transformer for detecting a current supplied to the electric motor 13 a to 13 c, 15 is the sum that calculates the sum of currents I of the current I ₁ ~I ₃ detected by the current transformer 14 a to 14 c.
16a to 16c are function generators 12a to
Multipliers 17a to 17a for multiplying each load sharing rate output from 12c by the current sum I calculated by the summer 15
7c represents currents I _{1 to} I ₃ from the outputs of the multipliers 16a to 16c.
Subtracters 18a to 18c subtract the subtractors 17a to 1
Input side, middle side, and output side bridle roll load sharing that supplies current to the electric motors 13a to 13c so as to control the load sharing on each of the input side, middle side, and output side bridle rolls 2 to 4 based on the output of 7c. Controller (load sharing controller)
Is.

Next, the operation will be described. The tensions of the entrance side, the middle side and the exit side bridle rolls 2 to 4 on the entrance side and the exit side change depending on the situation of the line. At that time, in order to keep the tension of the steel sheet 1 constant, it is necessary to obtain the load sharing rate applied to each of the entrance side, middle side and exit side bridle rolls 2 to 4.
Therefore, a data pattern for causing the function generators 12a to 12c to output the load sharing rate of each of the entrance side, middle side and exit side bridle rolls 2 to 4 with respect to the tension ratio (T4 / T1) of the entrance side and the exit side is set. By doing so, it becomes possible to directly derive the load sharing rate of each of the in-side, middle-side, and out-side bridle rolls 2 to 4 without the need for complicated calculations, aiming to shorten the calculation time and improve the output responsiveness accordingly. be able to.

FIG. 2 is an explanatory diagram showing a method of calculating the approximate characteristic of the function generator. The concrete setting method of the data pattern to the function generators 12a to 12c is as follows. First, the tension ratio between the input side and the output side (T4 / T1)
Is defined as X, and the corresponding load sharing rate of the bridle rolls 2 to 4 on the input side, the middle side, and the output side is set to Y, and the calculation formula (7) to
Based on (9), each of the entrance-side, middle-side, and exit-side bridle rolls 2 to 4 at arbitrary intervals (x ₀ , y ₀ ),
(X ₁ , y ₁ ), (x ₂ , y ₂ ) ... (x _n , y _n ).
Calculate the coordinates of and plot. In this case, the winding angles θ1 of the entrance-side, middle-side, and exit-side bridle rolls 2 to 4
Since θ2 and θ3 depend on the device, the winding angle θ
1, θ2, θ3 and their total θ are preset and calculated. Next, the approximate characteristic passing through the plotted points is calculated from the coordinates. Figure 2 shows 1
This is an example using the following formula. In this case, if the input is X, then x
_{For i} <X <x _{i + 1} , the output Y is Y = y _i + {(y _i-1 −y _i ) / (x _i−1 −x _i )} × (X−x _i ) where X When <x ₀ , Y = y ₀ , and when X> x _n−1 , Y = y _n−1 (10), and the approximate characteristic can be obtained from this calculation formula (10).

FIG. 3 is a conceptual diagram of a data pattern of the function generator. As shown in the figure, the tension ratio between the inlet side and the outlet side (X axis in FIG. 2: T4 / T1) is 0 in increments of 0. Set up to 5 and set the tension ratio (T4 / T1) to 0.1
Load sharing rate of each of the entrance-side, middle-side, and exit-side bridle rolls 2 to 4 corresponding to the value of the step (Y axis in FIG. 2: L1 / ΣL
n, L2 / ΣLn, L3 / ΣLn) are calculated from the approximate characteristics shown in FIG. 2 and set as parameters. FIG. 4 is a characteristic diagram of the load sharing ratio corresponding to the tension ratio obtained as a result of setting the above parameters.

This function generator 12a-
Based on the data pattern (FIG. 3) set to 12c, each entrance side, middle side and exit side bridle rolls 2 to 4 corresponding to the tension ratio (T4 / T1) output from the divider 11
Load sharing ratio (L1 / ΣLn, L2 / ΣLn, L
3 / ΣLn) are extracted, and the bridle roll load sharing controller 1 for the input side, the middle side, and the output side based on those load sharing rates.
By controlling the current supplied to the electric motors 13a to 13c by 8a to 18c, it is possible to control the load sharing on each of the entrance-side, middle-side, and exit-side bridle rolls 2 to 4. In addition, in this reference example 1, an apparatus using three inlet-side, middle-side and outlet-side bridle rolls 2 to 4 is shown, but the number of bridle rolls may be four or more, and the tension ratio can be changed by the function generator. This can be realized by setting the load sharing rate applied to four or more bridle rolls according to the load. Also, the entrance side,
Winding angle θ of the middle and outlet bridle rolls 2-4
In the case of a device in which 1, 1, θ 2, θ 3 and their total θ are different, the data pattern may be set according to the different values of θ 1, θ 2, θ 3, θ. Furthermore, this reference example 1
In the above, an example in which a linear expression is used to calculate the approximate characteristic from the coordinates is shown, but a more accurate approximate expression may be used.

As described above, according to the invention of the first reference example , the function generators 12a to 12c determine the load sharing rates of the bridle rolls 2 to 4 on the entrance side, the middle side, and the exit side based on the tension ratios on the entrance side and the exit side. By setting to, it is possible to directly output the load sharing rate of each bridle roll 2 to 4 on the input side, the middle side, and the output side. Therefore, it is not necessary to use a complicated calculation formula during control, and calculation can be performed. There is an effect that the time can be shortened and the output response can be improved accordingly. Furthermore, by using the function generators 12a to 12c for setting the data pattern, there is an effect that the data pattern can be set very easily.

First Embodiment FIG. 5 is a configuration diagram showing a tension control bridle roll load sharing control device according to Embodiment 1 of the present invention. In the figure, 19 is a load sharing applied to all the entrance-side, middle-side and exit-side bridle rolls 2 to 4. From the sum of the ratios (1), the sum of the load sharing ratios (K ₁ + K ₂ ) applied to each of the entrance-side and middle-side bridle rolls 2 and 3 other than the exit-side bridle roll 4 is subtracted, and the value (1- (K ₁ + K ₂ )) is the load sharing rate of the outgoing bridle roll 4. Since other configurations are the same as those of the reference example 1, duplicate description will be omitted.

Next, the operation will be described. In Reference Example 1, all the bridle rolls on the inlet side, the middle side, and the outlet side 2 to
4 to function generators 12a-12c
However, by providing the subtractor 19 as shown in FIG. 2, it is possible to obtain the load sharing rate even if one function generator 12c is not required. That is, this subtractor 19 utilizes the fact that the sum of the load sharing rates applied to all the entrance-side, middle-side, and exit-side bridle rolls 2 to 4 is (1), so that the entrance-sides other than the exit-side bridle roll 4 can be used. , The function generators 12a and 12b are provided for the middle bridle rolls 2 and 3, and the load sharing ratios of the input side and middle side bridle rolls 2 and 3 are output, and the load sharing of the remaining one output bridle roll 4 is performed. The rate is calculated from the sum (1) of the load sharing rates applied to the bridle rolls 2 to 4 on the input side, the middle side, and the output side.
It has a mechanism for subtracting the sum (K ₁ + K ₂ ) of the load sharing rates output from b. As a result, the function generator 12c can be dispensed with, the data pattern need not be set, the configuration can be facilitated, and the data pattern setting time and the setting error can be reduced. .

As described above, according to the invention of the first embodiment, the tension on the inlet side and the outlet side with respect to all the inlet side and middle side bridle rolls 2 and 3 except for one outlet side bridle roll 4. By setting the data pattern of the load sharing ratio by the ratio to the function generators 12a and 12b, the load sharing ratio is directly output, and the remaining one load bridging roll 4 has all the load sharing ratios of the input side, the middle side and the output side. Subtracting the sum (K ₁ + K ₂ ) of the load sharing rates of the input side and middle side bridle rolls 2 and 3 output from the function generators 12a and 12b from the sum of the load sharing rates of the side bridle rolls 2 to 4 (1). As a result, since the function generator 12c is not used for one exit side bridle roll 4, the configuration can be facilitated and
This has the effect of shortening the data pattern setting time and reducing setting errors.

Embodiment 2 . FIG. 6 is a configuration diagram showing a tension control bridle roll load sharing control device according to a second embodiment of the present invention. In the figure, reference numeral 20 denotes load sharing according to a data pattern set in a function generator corresponding to a roll-slip bridle roll. A rater is set to (0), and a compensator that outputs a constant so as to share the load sharing rate applied to each of the other bridle rolls according to the ratio of the load sharing rates so as to share the load sharing rate of the bridle roll that has slipped by the roll. Reference numerals 21a to 21c are multipliers that multiply the constant output from the corrector 20 and the load sharing ratio output from the function generators 12a to 12c. The other configurations are similar to those of the reference example 1 and the first embodiment, and thus the duplicate description will be omitted.

Next, the operation will be described. In Reference Example 1, the load sharing rate is obtained by the function generators 12a to 12c regardless of the roll slip, but by providing the compensator 20 as shown in FIG. 6, a more appropriate load sharing rate can be obtained at the time of roll slip. Obtainable. That is, the compensator 20 has a data table in which constants are set by selection of bridle rolls that apply a load at the time of roll slip, and the constants set in the data tables by the multipliers 21a to 21c are output from the function generators 12a to 12c. It has a mechanism for multiplying the load sharing rate of.

FIG. 7 is a conceptual diagram showing a data table of the corrector, and a specific method of deriving this data table will be described. In FIG. 7, the constant (0.000) indicates the bridle roll with the load sharing control turned off. For example, when the load sharing control of the outgoing side bridle roll 4 is turned off, the load sharing rate of the incoming side bridle roll 2 is obtained by multiplying the sharing rate (0.201) output from the function generator 12a by a constant (1.789). Value (0.201 x 1.789
= 0.360).

Next, the load sharing rate of each of the entrance side, middle side and exit side bridle rolls 2 to 4 when the load is applied to all of the entrance side, middle side and exit side bridle rolls 2 to 4 (A)
Shown in. (A) is the function generator 12a
.About.12c, the sum of the load sharing ratios of the three entrance-side, middle-side, and exit-side bridle rolls 2 to 4 is (1). (B) represents the constants when the bridle rolls to which the load is applied are the entrance-side, middle-side and exit-side bridle rolls 2 to 4, and the constants in (B) are multiplied by the share ratio in (A) to determine each entrance side, Outputs the load sharing rate applied to the middle and outlet bridle rolls 2 to 4. (C) represents the constants of the bridle rolls to which the load is applied on the entrance side and the middle side of the bridle rolls 2 and 3. By multiplying the constants of (C) by the share of (A) as in the case of (B), It outputs the load sharing rate applied to the entrance-side, middle-side, and exit-side bridle rolls 2 to 4. The derivation method of the constant is as follows: The share ratio of the outgoing bridle roll 4 which does not apply the load among the share ratios of the bridle rolls shown in (A) is calculated from (0.441) to (0.004).
In the case of (0), the sum of the share ratios of the incoming bridle roll 2 and the outgoing bridle roll 4 is (0.201) from (A).
+ 0.358 = 0.559, which is (1.0
00), (1.000 ÷ 0.559 =
1.789), and this value becomes a constant. (D),
The same applies to (E), and in (D), when the load sharing control of the middle bridle roll 3 is turned off, (E)
Indicates a constant when the load sharing control of the entrance side bridle roll 2 is turned off. As a result, it is possible to apply an appropriate load to each bridle roll by performing correction even during roll slip, and it is possible to improve the reliability of tension control.

As described above, according to the invention of the second embodiment, a constant preset by the selection of the bridle roll for applying the load at the time of roll slip is applied to the load sharing ratios output from the function generators 12a to 12c. Since the correction is applied by multiplying, the tension fluctuation does not occur even if the roll slips, and thus the reliability of the tension control can be improved.

Third Embodiment 8 is a block diagram showing a tension control bridle roll load sharing control device according to a third embodiment of the present invention. Implementation
In the form 1 , the load sharing rate is obtained by the function generators 12a and 12b and the subtractor 19 regardless of the roll slip, but as shown in FIG.
By providing 9 and the corrector 20, a more appropriate load sharing rate can be obtained during roll slip.

As described above, according to the invention of the third embodiment, the load sharing ratios of all bridle rolls other than one bridle roll are output from the function generator, and further set by selecting the bridle roll to which the load is applied. Apply the correction by multiplying the
The load sharing rate of the remaining one bridle roll is
By subtracting the sum (K ₁ + K ₂ ) of the corrected load sharing ratios of the other bridle rolls from the sum (1) of the load sharing ratios of the middle-side and delivery-side bridle rolls 2 to 4, Since the function generator is not used for the bridle roll and the correction by the roll slip is also applied, there is an effect that the setting time of the data pattern is shortened, the setting error is reduced, and the tension control reliability is improved at the same time.

Fourth Embodiment FIG. 9 is a configuration diagram showing a selector according to Embodiment 4 of the present invention. In the figure, 22a to 22c are operator switches (first switch) for instructing a corrector 20 by manually operating a bridle roll that is slipping. Selector).

Next, the operation will be described. Embodiment 2
In the above, correction by roll slip is applied,
As shown in FIG. 9, operator switches 22a to 22c
By providing the, it is possible to select a bridle roll that applies a load during roll slip. That is, the operator switches 22a to 22c are adapted to enable / disable selection of bridle rolls to be applied with load during roll slip by switch operation. This makes it possible for the operator to select the bridle roll that applies the load during roll slip, and to select the bridle roll that applies the load reliably regardless of the failure of the detector that detects the roll slip. You can

As described above, according to the invention of the fourth embodiment, since the bridle roll to which the load is applied at the time of roll slip can be selected by operating the operator switches 22a to 22c, the roll slip can be prevented. There is an effect that the bridle roll can be surely selected regardless of the failure of the detector to be detected.

Fifth Embodiment 10 is a block diagram showing a selector according to a fifth embodiment of the present invention, in which 23 is an electric motor 13a, 1 for driving each of the entrance side, middle side and exit side bridle rolls 2-4.
A selector (second selector) that detects a bridle roll that has slipped in accordance with a decrease in the current value supplied to 3b and 13c and issues a command to the corrector 20 for the bridle roll.

Next, the operation will be described. Embodiment 4
In the above, the selection of the bridle roll to which the load is applied at the time of roll slip is performed by the switch operation of the operator switches 22a to 22c. However, by providing the selector 23 as shown in FIG. The selection can be done automatically. That is, the selector 23 detects currents supplied to the electric motors 13a to 13c for driving the entrance-side, middle-side, and exit-side bridle rolls 2 to 4 by the current transformers 14a to 14c, and the current transformers 14a to 14c. To 14c buffer the load condition of each of the in-side, middle-side and out-side bridle rolls 2 to 4 from the current feedback value detected, and by looking at the tendency, roll slip is detected and the corresponding bridle roll is automatically detected. It has a mechanism for instructing the corrector 20 to be effective.

Specifically, in FIG. 10, the current feedback values of the electric motors 13a to 13c for driving the entrance-side, middle-side, and exit-side bridle rolls 2 to 4 are below the lower limit value determined by the hysteresis with respect to the current setting value. If the time is equal to or more than a certain value, the decrease flag is turned on. Next, when only one of the three ingress, middle and outgoing bridle rolls 2 to 4 is turned on, it is determined that the bridle roll corresponding to the on flag is slipping. Then, the compensator 20 is instructed to disconnect from the load sharing control, and when there are two or more flags that are turned on, it is not determined to be roll slip, and it is considered that the current feedback value has decreased due to some cause other than roll slip. The judgment is made and the load sharing control is not separated. As a result, it is possible to automatically select the bridle roll that applies a load at the time of roll slip, without manual operation.

As described above, according to the invention of the fifth embodiment, the selection of the bridle rolls to which the load is applied at the time of roll slip is selected based on the current feedback values of the entrance side, middle side and exit side bridle rolls 2 to 4. Buffering the load state of each of the entrance side, middle side and exit side bridle rolls 2 to 4, and detecting the roll slip by observing the tendency,
There is an effect that the corresponding bridle roll can be automatically commanded to the corrector 20.

Sixth Embodiment FIG. 11 is a configuration diagram showing a selector according to a sixth embodiment of the present invention. In the figure, reference numeral 24 denotes rolls in accordance with changes in roll peripheral speed values of each of the entrance side, middle side and exit side bridle rolls 2 to 4. It is a selector (third selector) that detects the slipped bridle roll and instructs the corrector 20 to perform the corresponding bridle roll.

Next, the operation will be described. Embodiment 5
In the above, the changes in the current feedback values of the entrance-side, middle-side, and exit-side bridle rolls 2 to 4 were observed as the roll slip judgment criteria. However, as shown in FIG. It is possible to automatically select a bridle roll to which a load is applied at the time of roll slip, from the peripheral speed values of the side and exit side bridle rolls 2 to 4. That is, the selector 24 buffers the load state of each entrance side, middle side and exit side bridle rolls 2 to 4 from the roll peripheral speed value of each entrance side, middle side and exit side bridle rolls 2 to 4, Roll slip is detected by checking the tendency, and the corresponding bridle roll is automatically corrected by the compensator 2.
It has a mechanism for commanding 0. Specifically, in FIG. 11, the bridle roll 2 on the entrance side, the middle side, and the exit side is shown.
When the peripheral speed values of 4 to 4 are equal to or more than the upper limit value determined by the hysteresis with respect to the speed setting value, the increase flag is turned on when the time is equal to or more than a certain value. Next, when only one of the increase flags of the three entrance side, middle side and exit side bridle rolls 2 to 4 is turned on, it is determined that the bridle roll corresponding to the flag that is turned on is slipping. Commanding the compensator 20 to disconnect from the load sharing control, and if there are two or more flags that are on, it is not determined to be roll slip, and the roll peripheral speed value has increased for some reason other than roll slip. The judgment is made and the load sharing control is not separated. As a result, it is possible to automatically select the bridle roll that applies a load at the time of roll slip, without manual operation.

As described above, according to the invention of the sixth embodiment, the selection of the bridle roll to which a load is applied at the time of roll slip is buffered from the roll peripheral speed value of the bridle roll, and the tendency is observed. Thus, there is an effect that the roll slip is detected and the corresponding bridle roll can be automatically instructed to the corrector 20.

Seventh Embodiment 12 is a configuration diagram showing a selector according to a seventh embodiment of the present invention. In the figure, reference numeral 25 denotes electric motors 13a-1 to 13b for driving the entrance-side, middle-side and exit-side bridle rolls 2-4.
Detecting the bridle rolls that have slipped according to the decrease in the current value supplied to 3c and the changes in the roll peripheral speed values of each of the entrance side, middle side and exit side bridle rolls 2 to 4, and the corresponding bridle rolls are detected. It is a selector (fourth selector) for instructing the corrector 20.

Next, the operation will be described. Embodiment 5
In the roll slip determination criteria, only the current feedback values of the entrance, middle, and exit bridle rolls 2 to 4 are used, and as the roll slip determination criteria in the sixth embodiment, the entrance, middle, and Although only the roll peripheral speed values of the exit side bridle rolls 2 to 4 were observed, by providing the selector 25 as shown in FIG. 12, both the current feedback value and the roll peripheral speed value indicate the load at the time of roll slip. The bridle roll to be applied can be automatically selected. That is, the selector 25 simultaneously buffers the current feedback value and the roll peripheral speed value of each of the entrance-side, middle-side and exit-side bridle rolls 2 to 4 and detects the roll slip by observing the tendency of the current feedback value and the roll peripheral speed value. It has a mechanism for automatically instructing the corrector 20 to perform the bridle roll.

Specifically, in FIG. 12, the current feedback values of the electric motors 13a to 13c for driving the entrance-side, middle-side, and exit-side bridle rolls 2 to 4 are below the lower limit value determined by the hysteresis with respect to the current setting value. In that case, the decrease flag is turned on when the time is a certain value or more. Also, when the roll peripheral speed value of each of the entrance side, middle side and exit side bridle rolls 2 to 4 is equal to or higher than the upper limit value determined by the hysteresis with respect to the speed setting value, the decrease flag is turned off when the time is equal to or more than a certain value. To do. Next, when the decrease flag based on the current feedback value is on and the decrease flag based on the roll peripheral speed value is off to each of the three entrance side, middle side and exit side bridle rolls 2 to 4, It is determined that the bridle roll is slipping and disconnected from the load sharing control.
As a result, it is possible to automatically select the bridle roll that applies a load at the time of roll slip, without manual operation.

As described above, according to the invention of the seventh embodiment, the selection of the bridle rolls to which the load is applied at the time of roll slip is selected by setting the current feedback values of the respective input side, middle side and output side bridle rolls 2 to 4. Since the roll slip is detected by buffering the load condition from the roll peripheral speed value and observing the tendency at the same time, it is better than detecting the roll slip only by the current feedback value or only the roll peripheral speed value. There is an effect that the roll slip can be detected more accurately.

Eighth Embodiment 13 is a block diagram showing a steel process line according to Embodiment 8 of the present invention. In the figure, 26a to 26c are shown.
Is a pulse generator that detects the roll peripheral speed values of the entrance-side, middle-side, and exit-side bridle rolls 2 to 4, and 27 is a plate speed detector that detects the plate speed of the steel plate 1. Also, FIG.
4 is a block diagram showing a selector according to an eighth embodiment of the present invention, in which 28 is a pulse generator 26a.
˜26c detects the bridle rolls that slipped in accordance with the difference between the roll peripheral speed value of each of the entrance side, middle side and exit side bridle rolls 2 to 4 and the plate speed detected by the plate speed detector 27. Then, it is a selector (fifth selector) for instructing the corrector 20 of the applicable bridle roll.

Next, the operation will be described. Embodiment 5
In the roll slip determination criteria, only the current feedback values of the entrance side, middle side, and exit side bridle rolls 2 to 4 are used, and as the roll slip determination criteria in the sixth embodiment, the entrance side, the middle side, and Although only the roll peripheral speed values of the exit side bridle rolls 2 to 4 are viewed, by providing the pulse generators 26a to 26c and the plate speed detector 27 as shown in FIG. 13 and the selector 28 as shown in FIG. It is possible to automatically select the bridle roll that applies the load during roll slip. That is, the selector 28 compares the roll peripheral speed values of the entrance-side, middle-side and exit-side bridle rolls 2 to 4 detected by the pulse generators 26a to 26c with the plate speed detected by the plate speed detector 27. It has a mechanism for buffering the difference and detecting the roll slip by observing the tendency, and automatically instructing the corrector 20 for the corresponding bridle roll. Specifically, in FIG. 14, the plate speed obtained from the plate speed detector 27 and the pulse generators 26 attached to the respective inlet, middle and outlet bridle rolls 2 to 4 are shown.
When the deviation from the roll peripheral speed obtained from a to 26c is within the D band, the corresponding bridle roll performs load sharing control, and when the deviation is outside the D band, the corresponding bridle roll slips. It is determined that the load is shared and the load sharing control is disconnected. This makes it possible to automatically select a bridle roll that applies a load at the time of roll slip, rather than manually.

As described above, according to the invention of the eighth embodiment, the selection of bridle rolls to be loaded at the time of roll slip is detected by the pulse generators 26a to 26c. Roll 2
The bridle rolls that roll-slip are detected according to the difference between the roll peripheral speed value of ~ 4 and the plate speed detected by the plate speed detector 27, and the bridle roll to which the load is applied at the time of roll slip is not selected manually. It is possible to carry out automatically, and there is an effect that the roll slip can be detected more accurately than in the case where the roll slip is detected only by the current feedback value or only the roll peripheral speed value.

Ninth Embodiment FIG. 15 is a block diagram showing a steel process line according to Embodiment 9 of the present invention. In the figure, 29a to 29c are shown.
Is a laser velocimeter for detecting the roll peripheral velocity values of the entrance-side, middle-side and exit-side bridle rolls 2 to 4. Also, FIG.
6 is a block diagram showing a selector according to Embodiment 10 of the present invention, in which 30 is a laser speed meter 29a-2.
The bridle rolls slipped are detected according to the difference between the roll peripheral speed values of the entrance-side, middle-side and exit-side bridle rolls 2 to 4 detected by 9c and the plate speed detected by the plate speed detector 27. , A selector (sixth selector) for instructing the corrector 20 of the applicable bridle roll.

Next, the operation will be described. Embodiment 8
The measurement of the roll peripheral speed value at
6a to 26c, the bridle roll applies a load during roll slip by providing laser speedometers 29a to 29c and a plate speed detector 27 as shown in FIG. 15 and a selector 30 as shown in FIG. Can be selected automatically. That is, the selector 30 is provided with the roll peripheral speed values of the entrance-side, middle-side and exit-side bridle rolls 2 to 4 measured from the laser speedometers 29a to 29c and the plate speed measured from the plate speed detector 27. The difference between the two is buffered and the tendency is detected to detect the roll slip,
Ingress, Middle and Egress Bridle Rolls 2-4 as applicable
Has a mechanism for automatically instructing the corrector 20. Specifically, in FIG. 16, the plate speed obtained from the plate speed detector 27 and the roll peripheral speed values obtained from the laser velocimeters 29a to 29c attached to the entrance-side, middle-side, and exit-side bridle rolls 2 to 4 respectively. If the deviation from the D band is within the D band, the corresponding bridle roll performs load sharing control, and the deviation is D
If it is out of the band, it is determined that the corresponding bridle roll is slipping and disconnected from the load sharing control. This makes it possible to automatically select a bridle roll that applies a load at the time of roll slip, rather than manually.

As described above, according to the invention of the ninth embodiment, the selection of bridle rolls to be loaded during roll slip is detected by the laser velocimeters 29a to 29c. According to the difference between the roll peripheral speed value of the bridle rolls 2 to 4 and the plate speed detected by the plate speed detector 27, the bridle roll that slips is detected and the load of the roll slip is manually selected. There is an effect that the roll slip can be detected automatically and the roll slip can be detected more accurately than the case where the roll slip is detected only by the current feedback value or only the roll peripheral speed value. Also,
The laser speedometers 29a to 29c are the pulse generator 26.
Since the measurement accuracy is higher than a to 26c, there is an effect that highly accurate control can be performed.

[0053]

As described above, according to the first aspect of the invention, the load sharing rate applied to each bridle roll according to the tension ratio between the entrance side and the exit side of the bridle roll is converted into a data pattern by the converter. Since the setting is performed and the load sharing on each bridle roll is controlled based on the data pattern, there is an effect that the calculation time can be shortened and the output response can be improved accordingly. Also,
With a case where the denominator occurs when determined by the equation becomes 0 can be avoided, it is possible to reduce the design time and debugging time in accordance with reduction in the number of steps, roll slip by corrector
Device set in the converter corresponding to the bridle roll
Calculated by load sharing ratio by data pattern or subtractor
The load sharing rate is set to 0, and each other bridle law
The load sharing ratio of the load according to the ratio of the load sharing ratio.
Load sharing of bridle roll
Since it is configured to share the
The tension can be controlled to a constant value without any influence, and
It has the effect of improving reliability .

According to the second aspect of the invention, the converter is
Since the function generator is configured to set the data pattern based on the function of the tension ratio and the load sharing ratio applied to each bridle roll, the data pattern can be easily set from the function of the tension ratio and the load sharing ratio. There is an effect that can be.

According to the third aspect of the present invention, the load sharing factor corresponding to the tension ratio between the entrance side and the exit side of the bridle rolls other than one bridle roll is set as a data pattern by the converter, and the subtractor is used. Configured so that the sum of the load sharing ratios of all bridle rolls is subtracted from the sum of the load sharing ratios of each bridle roll other than one bridle roll, and the subtracted value is taken as the load sharing ratio of the remaining one bridle roll. Therefore, since the converter is not used for one bridle roll, there is an effect that the setting time of the data pattern and the setting error can be reduced.

According to the fourth aspect of the present invention, the load sharing rate according to the data pattern set in the converter corresponding to the bridle roll slipped by the compensator or the load sharing rate calculated by the subtractor is set to 0, Since the load sharing rate of each of the other bridle rolls is configured to be shared by the load sharing rate of the bridle roll that slips according to the ratio of the load sharing rates, even if the roll slips, there is no effect and the tension is kept constant. Therefore, there is an effect that the reliability of tension control can be improved.

[0057] According to the invention of claim 5, wherein the first selector selects the the lube ride Ruroru Rolling slip manual operation, select what bridle roll
Since it is configured to be selected or transmitted to the corrector, it is possible to reliably select the bridle roll that bears the load regardless of the failure of the detector that detects the roll slip.

According to the sixth aspect of the present invention, the bridle roll slipped according to the decrease in the current value supplied to the electric motor for driving each bridle roll by the second selector is detected, and which bridle roll is detected. Select
Since it is configured to be transmitted to the corrector, it is possible to automatically select the bridle roll that shares the load during roll slip.

According to the seventh aspect of the present invention, the third selector detects the bridle roll that has slipped according to the change in the roll peripheral speed value of each bridle roll,
Since the bridle roll to be selected is transmitted to the corrector, it is possible to automatically select the bridle roll to share the load during roll slip.

According to the invention described in claim 8, the current value supplied to the electric motor for driving each bridle roll by the fourth selector is decreased and the roll peripheral speed value of each bridle roll is changed. It is configured to detect the bridle roll that slipped and transmit which bridle roll <br /> to the compensator, so it is possible to automatically select the bridle roll that shares the load during roll slip. The roll slip can be detected more accurately than the case where the roll slip is detected only by the current feedback value or only the roll peripheral speed value.

According to the ninth aspect of the invention, depending on the difference between the roll peripheral speed value of each bridle roll detected by the pulse generator by the fifth selector and the plate speed detected by the plate speed detector. and then, it is transmitted to the either <br/> corrector selects the roll slipped bridle detects ,, which bridle roll, is possible to select the bridle roll burdening during roll slip automatically In addition to being possible, there is an effect that the roll slip can be detected more accurately.

According to the tenth aspect of the present invention, depending on the difference between the roll peripheral speed value of each bridle roll detected by the laser speedometer by the sixth selector and the plate speed detected by the plate speed detector. Since it is configured to detect the bridle roll that slipped by roll and transmit to the compensator which bridle roll to select , it is possible to automatically select the bridle roll to apply the load during roll slip, There is an effect that the roll slip can be detected more accurately. Further, since the laser speed meter has high detection accuracy, there is an effect that highly accurate control can be performed.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a tension control bridle roll load sharing control device according to a first reference example of the present invention.

FIG. 2 is an explanatory diagram showing a method of calculating approximate characteristics of a function generator.

FIG. 3 is a conceptual diagram of a data pattern of a function generator.

FIG. 4 is a characteristic diagram of a load sharing ratio corresponding to a tension ratio obtained as a result of setting parameters.

FIG. 5 is a configuration diagram showing a tension control bridle roll load sharing control device according to Embodiment 1 of the present invention.

FIG. 6 is a configuration diagram showing a tension control bridle roll load sharing control device according to a second embodiment of the present invention.

FIG. 7 is a conceptual diagram showing a data table of a corrector.

FIG. 8 is a configuration diagram showing a tension control bridle roll load sharing control device according to a third embodiment of the present invention.

FIG. 9 is a configuration diagram showing a selector according to Embodiment 4 of the present invention.

FIG. 10 is a configuration diagram showing a selector according to a fifth embodiment of the present invention.

FIG. 11 is a configuration diagram showing a selector according to a sixth embodiment of the present invention.

FIG. 12 is a configuration diagram showing a selector according to Embodiment 7 of the present invention.

FIG. 13 is a configuration diagram showing a steel process line according to an eighth embodiment of the present invention.

FIG. 14 is a configuration diagram showing a selector according to an eighth embodiment of the present invention.

FIG. 15 is a configuration diagram showing a steel process line according to Embodiment 9 of the present invention.

FIG. 16 is a configuration diagram showing a selector according to Embodiment 9 of the present invention.

FIG. 17 is a configuration diagram showing a conventional steel process line.

[Explanation of symbols]

2 Entry side bridle roll (bridle roll), 3
Middle side bridle roll (bridle roll), 4 side bridle roll (bridle roll), 12a to 12
c Function generator (converter), 13a-
13c Electric motor, 18a Input side bridle roll load sharing controller (load sharing controller), 18b Middle side bridle roll load sharing controller (load sharing controller), 18c Output side bridle roll load sharing controller (load sharing controller) ,
19 subtractor, 20 corrector, 22a to 22c Operator switch (first selector), 23 selector (second selector), 24 selector (third selector), 25 selector (fourth selector) Selector), 26a to 26c pulse generator, 27 plate speed detector, 28 selector (fifth selector), 29a to 29c laser speedometer, 30 selector (sixth selector).

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Ichiyuki Kinoshita 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Tomoaki Sekiguchi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi (56) Reference JP-A 64-87457 (JP, A) JP-A 7-249126 (JP, A) JP-A 8-137537 (JP, A) JP-A 5-89160 (JP , A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02P 5/46 B21C 47/00 B65H 23/192

Claims (10)

(57) [Claims] 1. A tension control bridle roll load sharing control device for controlling load sharing applied to each bridle roll based on a tension ratio between an entrance side and an exit side of the bridle roll that controls tension in a steel process line. A converter that sets the load sharing rate applied to each bridle roll according to the tension ratio between the input side and the output side as a data pattern, and the load sharing applied to each bridle roll based on the data pattern set in the converter a load sharing control unit for controlling, the bridle roll Rorusuri
Of the bridle roll
Negative due to the data pattern set in the converter corresponding to
Set the load sharing rate or the load sharing rate calculated by the subtractor to 0.
And the load sharing rate of each other bridle roll
The roll slip above according to their load sharing ratio
Compensator that shares the load share of the bridle roll
Tension control bridle roll load sharing control device characterized by comprising a. 2. A load sharing device for each bridle roll according to the tension ratio based on a function of a tension ratio between the entrance side and the exit side of the bridle roll and a load sharing ratio for each bridle roll. The tension control bridle roll load sharing control device according to claim 1, wherein the tension control bridle roll load distribution control device is a function generator that sets a rate as a data pattern. 3. A tension control bridle roll load sharing control device for controlling a load sharing rate applied to each bridle roll based on a tension ratio between an inlet side and an outlet side of the bridle roll for controlling the tension of a steel process line. A converter that sets the load sharing rate applied to each bridle roll other than the above-mentioned one bridle roll according to the tension ratio between the entrance side and the exit side of the bridle roll other than the bridle roll as a data pattern, and applies to all bridle rolls A subtractor that subtracts the sum of the load sharing ratios of the bridle rolls other than the one bridle roll from the sum of the load sharing ratios, and uses the subtracted value as the load sharing ratio of the remaining one bridle roll, and the converter. Based on the data pattern set in and the load sharing ratio calculated by the subtractor A tension control bridle roll load sharing control device comprising: a load sharing controller that controls a load sharing rate applied to each bridle roll. 4. A roll slip of a bridle roll is detected.
The load sharing rate according to the data pattern set in the converter corresponding to the bridle roll slipped out or the load sharing rate calculated by the subtractor is set to 0, and the load sharing rate applied to each of the other bridle rolls is set to the load. The tension control bridle roll load sharing control device according to claim 3, further comprising a compensator that shares the load sharing ratio of the bridle roll that has slipped according to the ratio of the sharing ratio. 5. Select the the lube ride Ruroru Rolling slip manually, which Buraidoruro
5. The tension control bridle roll load sharing control device according to claim 1 or 4 , further comprising a first selector for selecting a load or transmitting it to a corrector. 6. A bridle roll that has slipped according to a decrease in a current value supplied to an electric motor that drives each bridle roll, and which bridle roll is selected.
Tension control bridle roll load sharing control device according to any one of claims 1, 4 and 5, characterized in that a second selector for transmitting the corrector or. 7. A third selector for detecting a bridle roll slipped according to a change in the roll peripheral speed value of each bridle roll and transmitting to the compensator which bridle roll is to be selected. It provided, The claim 1 characterized by the above-mentioned.
4. The tension control bridle roll load sharing control device according to claim 4. 8. A bridle roll that slips is detected according to a decrease in a current value supplied to an electric motor driving each bridle roll and a change in a roll peripheral speed value of each bridle roll, and which bridle roll is selected. You
Luke corrector tension control bridle roll load sharing control device according to any one of claims 1, 4 and 5, characterized in that it comprises a fourth selector for transmission. 9. A pulse generator for detecting a roll peripheral speed value of each bridle roll, a plate speed detector for detecting a plate speed, a roll peripheral speed value of each bridle roll detected by the pulse generator, and the plate speed. Detects the bridle roll that slipped according to the difference with the plate speed detected by the detector, and selects which bridle roll
Tension control bridle roll load sharing control device according to any one of claims 1, 4 and 5, characterized in that it comprises a fifth selector for transmitting the corrector or. 10. A laser speed meter for detecting a roll peripheral speed value of each bridle roll, a plate speed detector for detecting a plate speed, a roll peripheral speed value of each bridle roll detected by the laser speed meter, and the above. It is characterized by including a sixth selector for detecting the bridle roll slipped according to the difference from the plate speed detected by the plate speed detector and transmitting to the corrector which bridle roll is to be selected. tension control bridle roll load sharing control device according to any one of claims 1,4,5.