CN113305157B - Method and device for determining loop roller gravity data - Google Patents
Method and device for determining loop roller gravity data Download PDFInfo
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- CN113305157B CN113305157B CN202110515543.7A CN202110515543A CN113305157B CN 113305157 B CN113305157 B CN 113305157B CN 202110515543 A CN202110515543 A CN 202110515543A CN 113305157 B CN113305157 B CN 113305157B
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- 238000000034 method Methods 0.000 title claims abstract description 59
- 238000005259 measurement Methods 0.000 claims abstract description 26
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- 230000001174 ascending effect Effects 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000005096 rolling process Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
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- 238000012360 testing method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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Abstract
The invention provides a method and a device for determining loop roller gravity data, wherein the method comprises the following steps: when a measurement instruction is received, controlling the loop to drop to the lowest position; when reaching a preset first time delay duration, controlling the loop to rise from the lowest position along a preset speed; acquiring first loop roller gravity data corresponding to loops reaching each target position; when the loop reaches the highest position and reaches a preset second time delay time length, controlling the preset speed of the loop to start to descend from the highest position; acquiring second loop roller gravity data corresponding to the loops reaching each target position; determining target gravity data of the loop roll based on the first loop roll gravity data and the second loop roll gravity data; thus, the gravity data of the first loop roller and the gravity data of the second loop roller corresponding to the loop at the target position can be automatically obtained; then determining target gravity data; compared with the mode of manually measuring the gravity data, the measuring efficiency and the measuring precision of the gravity data of the loop roller can be improved.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a method and a device for determining loop roller gravity data.
Background
The loop is an important strip steel tension control device of a hot continuous rolling production line. In the rolling process, after the loop is lifted to the normal rolling height, the force control is started, and the loop arm is acted by the strip steel tension, the strip steel gravity and the loop roller gravity. The total moment required for controlling the loop comprises the tension moment of the strip steel, the gravity moment of the strip steel and the gravity moment of the loop roller. Therefore, the gravitational moment of the loop roller is one of the important parameters in loop control.
In the actual production process, due to the problems of poor lubrication, blockage and the like of mechanical equipment, the gravity moment of the loop roller arranged in the control parameters is not suitable for the control of the loop, the tension of strip steel is too large or too small, and the problems of stack steel, too narrow strip steel width and the like occur, so that the actual gravity data of the loop roller are required to be measured frequently.
In the prior art, the actual gravity data is generally measured manually by manpower, then the measured data curve is analyzed, the measurement and analysis time of the gravity data of a single loop roller is about 10 minutes, and the measurement efficiency is low; and the analysis conclusion obtained by different operators is also different, and the measurement accuracy is not high.
Disclosure of Invention
Aiming at the problems existing in the prior art, the embodiment of the invention provides a method and a device for determining the gravity data of a loop roller, which are used for solving the technical problem that the measurement efficiency and the measurement precision cannot be ensured when the actual gravity data of the loop roller is measured manually in the prior art.
The invention provides a method of determining loop roll gravity data, the method comprising:
when a measurement instruction is received, controlling the loop to drop to the lowest position;
when reaching a preset first time delay duration, controlling the loop to rise from the lowest position along a preset speed;
in the ascending process, acquiring first loop roller gravity data corresponding to the loops reaching each target position;
when the loop reaches the highest position and reaches a preset second time delay duration, controlling the loop to descend from the highest position according to a preset speed;
in the descending process, acquiring second loop roller gravity data corresponding to the loops reaching each target position;
for any target position, determining target gravity data of the loop roller based on the first loop roller gravity data and the second loop roller gravity data, wherein the target gravity data is an average value of the first loop roller gravity data and the second loop roller gravity data.
Optionally, after determining the target gravity data of the loop roller based on the first loop roller gravity data and the second loop roller gravity data, the method further includes:
for any target position, acquiring gravity setting data corresponding to the target position;
acquiring a difference value between the target gravity data and the gravity setting data;
and judging whether the difference value is in a deviation range, and if the difference value is determined to be in the deviation range, determining that the gravity setting data is normal.
Optionally, if it is determined that the difference is not within the deviation range, the method further includes:
and determining that the gravity setting data is abnormal, and triggering an alarm prompt.
Optionally, the first time delay time is 2-5 s, and the second time delay time is 5-10 s.
Alternatively, the deviation range is (-500, 1000 Nm).
The present invention provides an apparatus for determining loop roll gravity data, the apparatus comprising:
the control unit is used for controlling the loop to drop to the lowest position when receiving the measurement instruction; when reaching a preset first time delay duration, controlling the loop to rise from the lowest position along a preset speed; when the loop reaches the highest position and reaches a preset second time delay duration, controlling the loop to descend from the highest position according to a preset speed;
the acquisition unit is used for acquiring the gravity data of the corresponding first loop roller when the loop reaches each target position in the ascending process; in the descending process, acquiring second loop roller gravity data corresponding to the loops reaching each target position;
the determining unit is used for determining target gravity data of the loop roller according to the first loop roller gravity data and the second loop roller gravity data aiming at any target position, wherein the target gravity data is an average value of the first loop roller gravity data and the second loop roller gravity data.
Optionally, the determining unit is further configured to:
after determining target gravity data of the loop roller based on the first loop roller gravity data and the second loop roller gravity data, acquiring gravity setting data corresponding to any target position;
acquiring a difference value between the target gravity data and the gravity setting data;
and judging whether the difference value is in a deviation range, and if the difference value is determined to be in the deviation range, determining that the gravity setting data is normal.
Optionally, the determining unit is further configured to:
if the difference value is not in the deviation range, determining that the gravity setting data is abnormal, and triggering an alarm prompt.
Optionally, the first time delay time is 2-5 s, and the second time delay time is 5-10 s.
Alternatively, the deviation range is (-500, 1000 Nm).
The invention provides a method and a device for determining loop roller gravity data, wherein the method comprises the following steps: when a measurement instruction is received, controlling the loop to drop to the lowest position; when reaching a preset first time delay duration, controlling the loop to rise from the lowest position along a preset speed; in the ascending process, acquiring first loop roller gravity data corresponding to the loops reaching each target position; when the loop reaches the highest position and reaches a preset second time delay duration, controlling the loop to start to descend from the highest position at a preset speed; in the descending process, acquiring second loop roller gravity data corresponding to the loops reaching each target position; determining target gravity data of the loop roll based on the first loop roll gravity data and the second loop roll gravity data for any target position, wherein the target gravity data is an average value of the first loop roll gravity data and the second loop roll gravity data; in this way, in the process that the loop ascends from the lowest position to the highest position, the gravity data of the first loop roller corresponding to the loop at the target position can be automatically acquired; in the process that the loop descends from the highest position to the lowest position, the gravity data of a second loop roller corresponding to the loop at the target position can be automatically acquired; then determining target gravity data based on the first loop roll gravity data and the second roll gravity data; compared with the mode of measuring the gravity data manually, the efficiency and the precision of the gravity data of the loop roller can be obviously improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic structural view of a swing arm hydraulic driving loop according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for determining loop roll gravity data provided by an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for determining loop roll gravity data according to an embodiment of the present invention.
Detailed Description
The invention provides a method and a device for determining the gravity data of a loop roller, aiming at solving the technical problem that the measurement efficiency and the measurement precision cannot be ensured when the actual gravity data of the loop roller is measured manually in the prior art.
In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present specification are described in detail below through the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments of the present specification and the specific features of the embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and not limit the technical solutions of the present specification, and the technical features of the embodiments of the present specification may be combined without conflict.
For better understanding of the technical solution of the present application, a lower hot continuous rolling line is first described herein, as shown in fig. 1, the hot continuous rolling line includes: the four-high rolling mill comprises a plurality of four-high rolling mill bodies 1, swing arm type loop equipment 2 and a swing arm type loop equipment 2 which is arranged between every two adjacent four-high rolling mill bodies 1; the swing arm type looper 2 includes: the hydraulic cylinder, the servo valve, the position detection sensor and the pressure sensor;
the hydraulic cylinder is used for driving the loops to act, the servo valve is used for controlling the hydraulic cylinder, the position detection sensor is used for detecting the position of each loop, and the pressure sensor is used for measuring the pressure of a rod cavity and a rodless cavity of the hydraulic cylinder.
The embodiment provides a method for determining loop roller gravity data, as shown in fig. 1, the method includes:
s210, when a measurement instruction is received, controlling the loop to drop to the lowest position;
when the hot continuous rolling production line is in an empty load state (such as during the maintenance of the production line), a worker can send a measurement instruction (such as pressing a start key) through a human-computer interaction interface, and when the control equipment receives the measurement instruction, the loop is controlled to drop to the lowest position.
Specifically, when the control equipment receives a measurement instruction, the servo control of the loop to be tested is automatically released based ON the measurement instruction, the electromagnetic valve is controlled to send a start-up ON signal, the rodless cavity of the loop hydraulic cylinder is rapidly filled with oil under the action of the electromagnetic valve, and the loop angle is rapidly dropped until the loop angle is at the lowest position.
Here, the lowest position is a preset position, or may be a mechanical lowest position of the loop itself, which is not limited herein. For example, the position at which the loop angle is 7 degrees may be the lowest position.
S211, when a preset first time delay time length is reached, controlling the loop to rise from the lowest position along a preset speed;
after the loop descends to the lowest position, starting timing, and controlling the loop to ascend from the lowest position along a preset speed when a preset first time delay duration is reached; the first time delay time period can be 2-5 s, and the preset speed can be 0.5-1 m/s. To ensure stability after the loop has been lowered, the first delay time is typically 5 seconds.
Specifically, when the preset first time delay duration is reached, the electromagnetic valve is controlled to send OFF signals, and servo control of the loop to be tested is put into.
S212, acquiring first loop roller gravity data corresponding to the loops reaching each target position in the ascending process;
and in the loop lifting process, acquiring corresponding first loop roller gravity data when the loops reach all target positions.
In the lifting process of the loop, when the loop reaches the target positions, the pressure detection sensor can detect the gravity data of the first loop roller in real time, and then the gravity data of the first loop roller is sent to the control equipment, so that the control equipment can acquire the gravity data of the first loop roller corresponding to the loop reaching each target position in the lifting process.
It should be noted that the loop roll gravity data described in this embodiment refers to the moment of gravity of the loop roll.
Wherein, the target position is the position corresponding to the loop reaching the target angle θ, and the target angle may include: 5 degrees, 17.5 degrees, 20 degrees, 22.5 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, and 50 degrees.
In the step, the first loop roller gravity data is detected in real time by using the pressure detection sensor, and the control equipment acquires the first loop roller gravity data in real time without manually analyzing a measurement curve, so that the data acquisition speed is improved, and the data acquisition precision is also improved.
S213, when the loop reaches the highest position and reaches a preset second time delay duration, controlling the loop to descend from the highest position according to a preset speed;
after the loop reaches the highest position and reaches a preset second time delay time length, the loop is controlled to descend from the highest position according to a preset speed; the second time delay period may be 5 to 10 seconds. Preferably 10s.
The highest position may be a preset position, or may be a mechanical highest position of the loop itself, which is not limited herein. For example, the position at which the loop angle is 50 degrees may be the highest position.
S214, acquiring second loop roller gravity data corresponding to the loops reaching each target position in the descending process;
and in the descending process, acquiring corresponding second loop roller gravity data when the loops reach each target position.
Similarly, in the descending process of the loop, when the loop reaches the target positions, the pressure detection sensor can detect the gravity data of the second loop roller in real time, and then the gravity data of the second loop roller is sent to the control equipment, so that the control equipment can acquire the gravity data of the second loop roller corresponding to the loop when the loop reaches each target position in the descending process.
Wherein, the target position is the position corresponding to the loop reaching the target angle, and the target angle may include: 5 degrees, 17.5 degrees, 20 degrees, 22.5 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, and 50 degrees.
In the step, the pressure detection sensor is utilized to detect the gravity data of the second loop roller in real time, and the control equipment acquires the gravity data of the second loop roller in real time without manually analyzing a measurement curve, so that the data acquisition speed is improved, and the data acquisition precision is also improved.
S215, determining target gravity data of the loop roller based on the first loop roller gravity data and the second loop roller gravity data aiming at any target position, wherein the target gravity data is an average value of the first loop roller gravity data and the second loop roller gravity data.
After the control device acquires the first loop roller gravity data and the second loop roller gravity data, in order to ensure measurement accuracy, determining target gravity data of the loop roller based on the first loop roller gravity data and the second loop roller gravity data, wherein the target gravity data is an average value of the first loop roller gravity data and the second loop roller gravity data.
Thus, the final actual gravity data of the looper roll is obtained. Further, the method further comprises, after determining the target gravity data, determining whether the gravity data set by the inspection system is suitable or not, the steps of:
for any target position, acquiring gravity setting data corresponding to the target position;
acquiring a difference value (target gravity data-gravity setting data) between the target gravity data and the gravity setting data;
and judging whether the difference value is in the deviation range, and if the difference value is determined to be in the deviation range, determining that the gravity setting data is normal. Wherein the deviation range is (-500, 1000 Nm).
If the difference is determined not to be within the deviation range, the method further comprises: and determining that the gravity setting data is abnormal, triggering an alarm prompt, and reminding a worker to revise the gravity setting data in time so that the gravity setting data meets the quality requirement of the production line.
If the alarm prompt information is not confirmed by the staff all the time, the alarm prompt is output all the time based on the preset alarm period until the alarm prompt information is confirmed.
For example, if the target position is the position corresponding to the loop angle of 20 degrees, the target gravity data is 11763Nm, the gravity setting data is 12210Nm, the difference is-447 Nm, and the difference is within the deviation range, so that it is determined that the target position is the target gravity data corresponding to the loop angle of 20 degrees, and the alarm is not triggered at this time.
It should be noted that, in this embodiment, as long as there is target gravity data corresponding to one target position that is not within the deviation range, the alarm prompt is triggered.
In this embodiment, when the loop rises from the lowest position to the highest position, the first loop roller gravity data corresponding to the loop at the target position may be automatically acquired; in the process that the loop descends from the highest position to the lowest position, the gravity data of a second loop roller corresponding to the loop at the target position can be automatically acquired; then determining target gravity data based on the first loop roll gravity data and the second roll gravity data; compared with the mode of measuring the gravity data manually, the efficiency and the precision of the gravity data of the loop roller can be obviously improved.
Based on the same inventive concept as the previous embodiment, this embodiment also provides an apparatus for determining the gravity data of a loop roller, as shown in fig. 3, the apparatus includes:
a control unit 31 for controlling the loop to drop to the lowest position when receiving the measurement instruction; when reaching a preset first time delay duration, controlling the loop to rise from the lowest position along a preset speed; when the loop reaches the highest position and reaches a preset second time delay duration, controlling the loop to descend from the highest position according to a preset speed;
an acquiring unit 32, configured to acquire first loop roller gravity data corresponding to when the loops reach each target position during an ascending process; in the descending process, acquiring second loop roller gravity data corresponding to the loops reaching each target position;
a determining unit 33, configured to determine, for any target position, target gravity data of the loop roller based on the first loop roller gravity data and the second loop roller gravity data, where the target gravity data is an average value of the first loop roller gravity data and the second loop roller gravity data.
Since the device described in the embodiments of the present invention is a device used for implementing the method of the embodiments of the present invention, based on the method described in the embodiments of the present invention, a person skilled in the art can understand the specific structure and the deformation of the device, and therefore, the description thereof is omitted herein. The device adopted by the method of the embodiment of the invention belongs to the scope of the invention to be protected.
In practical application, when the method and the device for determining the gravity data of the loop roller provided by the embodiment are used for measuring the gravity data of the 3# loop on the hot rolling production line of a certain enterprise, the method and the device are specifically implemented as follows:
when the production line stops producing and the loop No. 3 is in an idle state, a worker can click a start button for testing the gravity of the loop roller on the man-machine interaction interface.
When the control device receives the measurement instruction, the servo control of the 3# loop is automatically released based on the measurement instruction, the 3# loop descends to the lowest position, and the lowest position is the position corresponding to the loop angle of 6.8 degrees.
After a delay of 5s, the loop 3 is controlled to lift, and the loop starts to lift from the lowest position, wherein the lifting speed is 1m/s.
During the ascending process, the pressure sensor detects the gravity data of the first loop roller when the 3# loop reaches each target position in real time.
When the 3# loop reaches a position corresponding to the loop angle of 50 degrees, after delaying for 10 seconds, controlling the 3# loop to descend from the highest position according to a preset speed; during the descending process, the pressure sensor detects the gravity data of the second loop roller when the 3# loop reaches each target position in real time.
After the action is completed, the control equipment determines target gravity data corresponding to each target position. In this embodiment, the target gravity data corresponding to the 3# loop of 15 degrees, 17.5 degrees, 20 degrees, 22.5 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, and 50 degrees are: 12050Nm, 11875Nm, 11763Nm, 11632Nm, 11502Nm, 11511Nm, 11470Nm, 11321Nm;
the gravity setting data preset at the target position in the system are as follows: 12450Nm, 12300Nm, 12210Nm, 11930Nm, 11810Nm, 11750Nm, 11610Nm, 11500Nm;
then, the difference value corresponding to each target position is: -400Nm, -425Nm, -447Nm, -298Nm, -308Nm, -239Nm, -140Nm, -179Nm; it can be seen that each difference is within the deviation range, so that the loop roller gravity data is determined to be normal, and an alarm is not triggered.
In practical application, when the method and the device for determining the gravity data of the loop roller provided by the embodiment are used for measuring the gravity data of the loop No. 4 on a hot rolling production line of an enterprise, the method and the device are specifically implemented as follows:
when the production line stops producing and the No. 4 loop is in an idle state, a worker can click a start button of the loop roller gravity test on the man-machine interaction interface.
When the control device receives the measurement instruction, the servo control of the 4# loop is automatically released based on the measurement instruction, the 4# loop descends to the lowest position, and the lowest position is the position corresponding to the loop angle of 5.7 degrees.
After a delay of 5s, the loop # 4 is controlled to perform lifting operation, and the loop is lifted from the lowest position, wherein the lifting speed is 1m/s.
During the ascending process, the pressure sensor detects the gravity data of the first loop roller when the No. 4 loop reaches each target position in real time.
When the loop of the number 4 reaches a position corresponding to the loop angle of 50 degrees, after delaying for 10 seconds, controlling the loop of the number 4 to descend from the highest position according to a preset speed; during the descending process, the pressure sensor detects the gravity data of the second loop roller when the No. 4 loop reaches each target position in real time.
After the action is completed, the control equipment determines target gravity data corresponding to each target position. In this embodiment, the target gravity data corresponding to the loop number 4 of 15 degrees, 17.5 degrees, 20 degrees, 22.5 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, and 50 degrees are: 6876Nm, 6675Nm, 8820Nm, 8947Nm, 11052Nm, 8546Nm, 7050Nm, 6620Nm, 6638Nm;
the gravity setting data preset at the target position in the system are as follows: 6700Nm, 6520Nm, 6470Nm, 6390Nm, 6280Nm, 6140Nm, 6200Nm, 6230Nm, 6130Nm;
then, the difference value corresponding to each target position is: 176Nm, 155Nm, 2350Nm, 2557Nm, 4772Nm, 2406Nm, 850Nm, 390Nm, 508Nm; it can be seen that when the target position is the position corresponding to the loop angle of 20 degrees, 22.5 degrees, 25 degrees, 30 degrees and 35 degrees, the difference value exceeds the deviation range, so that the set gravity setting data is determined to be abnormal, and an alarm prompt is triggered. And the staff confirms the alarm information by clicking the key in the man-machine interaction interface and then alarms and eliminates the alarm.
The embodiment of the invention can automatically test the gravity data of the loop roller, judge whether the set gravity data is abnormal, effectively improve the determination efficiency of the gravity data of the loop roller and improve the product quality.
The above description is not intended to limit the scope of the invention, but is intended to cover any modifications, equivalents, and improvements within the spirit and principles of the invention.
Claims (8)
1. A method of determining loop roll gravity data, the method comprising:
when a measurement instruction is received, controlling the loop to drop to the lowest position;
when reaching a preset first time delay duration, controlling the loop to rise from the lowest position along a preset speed;
in the ascending process, acquiring first loop roller gravity data corresponding to the loops reaching each target position;
when the loop reaches the highest position and reaches a preset second time delay duration, controlling the loop to descend from the highest position according to a preset speed;
in the descending process, acquiring second loop roller gravity data corresponding to the loops reaching each target position;
determining target gravity data of the loop roll based on the first loop roll gravity data and the second loop roll gravity data for any target position, wherein the target gravity data is an average value of the first loop roll gravity data and the second loop roll gravity data;
after determining the target gravity data of the loop roll based on the first loop roll gravity data and the second loop roll gravity data, the method further comprises:
for any target position, acquiring gravity setting data corresponding to the target position;
acquiring a difference value between the target gravity data and the gravity setting data;
and judging whether the difference value is in a deviation range, and if the difference value is determined to be in the deviation range, determining that the gravity setting data is normal.
2. The method of claim 1, wherein if it is determined that the difference is not within the deviation range, the method further comprises:
and determining that the gravity setting data is abnormal, and triggering an alarm prompt.
3. The method of claim 1, wherein the first time delay period is 2 to 5 seconds and the second time delay period is 5 to 10 seconds.
4. The method of claim 1, wherein the deviation range is (-500, 1000 Nm).
5. An apparatus for determining loop roll gravity data, the apparatus comprising:
the control unit is used for controlling the loop to drop to the lowest position when receiving the measurement instruction; when reaching a preset first time delay duration, controlling the loop to rise from the lowest position along a preset speed; when the loop reaches the highest position and reaches a preset second time delay duration, controlling the loop to descend from the highest position according to a preset speed;
the acquisition unit is used for acquiring the gravity data of the corresponding first loop roller when the loop reaches each target position in the ascending process; in the descending process, acquiring second loop roller gravity data corresponding to the loops reaching each target position;
the determining unit is used for determining target gravity data of the loop roll based on the first loop roll gravity data and the second loop roll gravity data aiming at any target position, wherein the target gravity data is an average value of the first loop roll gravity data and the second loop roll gravity data;
the determining unit is further configured to:
after determining target gravity data of the loop roller based on the first loop roller gravity data and the second loop roller gravity data, acquiring gravity setting data corresponding to any target position;
acquiring a difference value between the target gravity data and the gravity setting data;
and judging whether the difference value is in a deviation range, and if the difference value is determined to be in the deviation range, determining that the gravity setting data is normal.
6. The apparatus of claim 5, wherein the determining unit is further to:
if the difference value is not in the deviation range, determining that the gravity setting data is abnormal, and triggering an alarm prompt.
7. The apparatus of claim 5, wherein the first time delay period is 2 to 5 seconds and the second time delay period is 5 to 10 seconds.
8. The apparatus of claim 5, wherein the deviation range is (-500, 1000 Nm).
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| JP2744404B2 (en) * | 1994-01-27 | 1998-04-28 | 三菱電機株式会社 | Rolling machine tension control device |
| CN101219438B (en) * | 2008-01-25 | 2011-05-18 | 广州珠江钢铁有限责任公司 | Hot continuous rolling mill loop control method and used controller |
| CN104772337A (en) * | 2014-01-09 | 2015-07-15 | 宝山钢铁股份有限公司 | Method for controlling torque loop quantity of hot continuous rolling mill |
| CN109731920B (en) * | 2019-01-18 | 2020-06-02 | 湖南华菱涟钢薄板有限公司 | Loop control method, device, terminal equipment and computer readable storage medium |
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