CN114888096A - Method for controlling plate shape by bending roller in segmented manner - Google Patents
Method for controlling plate shape by bending roller in segmented manner Download PDFInfo
- Publication number
- CN114888096A CN114888096A CN202210473177.8A CN202210473177A CN114888096A CN 114888096 A CN114888096 A CN 114888096A CN 202210473177 A CN202210473177 A CN 202210473177A CN 114888096 A CN114888096 A CN 114888096A
- Authority
- CN
- China
- Prior art keywords
- bending
- shape
- value
- roll
- plate shape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a method for controlling a plate shape by bending rolls in a segmented manner, which relates to the technical field of hot-rolled strip steel wave shape, and aims to solve the problems that in the prior art, after an operator observes a monitoring picture, manual intervention is performed to adjust the plate shape, the group difference is large, the control precision is low, the final plate shape fluctuation is large, and the high requirement of a user on the plate shape is difficult to meet, the following scheme is proposed, wherein the method for controlling the plate shape by bending rolls in a segmented manner comprises the following steps: s1, starting an F7 bending roll section control plate shape function; s2, detecting the plate shape value and carrying out filtering processing; s3, judging the filtered plate shape value according to the thickness layer; s4, performing feedback control on the bending roller based on the wave-shaped target value; and S5, controlling the wave shape of the strip steel by bending rollers in sections. The invention carries out real-time feedback control on the plate shape by setting target wave shape values of different specifications of steel grades, realizes automatic regulation control and reduces strip steel wave shape defects and manual intervention loads.
Description
Technical Field
The invention relates to the technical field of hot-rolled strip steel wave shape, in particular to a method for controlling the shape of a bending roll in a segmented manner.
Background
The strip steel plate shape is an important control index in the rolling process of the hot rolling coil, and along with the increasing requirements of users on the strip steel plate shape, higher requirements are provided for the plate shape control precision of hot rolling raw materials. Particularly, when high-strength steel is hot-rolled, uneven plastic deformation and temperature difference exist in the length direction or the width direction of strip steel in the rolling process, although a finish rolling outlet is not shown, the strip steel is discovered to have serious flatness defects after laminar cooling and uncoiling, wherein the double-side wave defects of an inner ring are particularly prominent, and the flat or heat treatment repair treatment is needed, so that the manufacturing cost is increased.
In order to improve the double-side wave defect of the inner ring of the hot coil, the micro-medium wave rolling technology is adopted, and the method can be applied to rolling of numerous high-strength steel products and becomes one of important measures for solving the problem of hot-rolled high-strength steel plate shapes. Therefore, in order to solve such problems, we propose a method of controlling the shape of the roll in sections.
Disclosure of Invention
The method for controlling the plate shape by the bending roller in a segmented manner solves the problems that in the prior art, after an operator observes a monitoring picture, manual intervention is performed to adjust the plate shape, group differences are large, the control precision is low, the final plate shape fluctuation is large, and the high requirements of users on the plate shape are difficult to meet.
In order to achieve the purpose, the invention adopts the following technical scheme:
the method for controlling the plate shape by the bending roll in a segmented manner comprises the following steps:
s1, starting an F7 bending roll section control plate shape function;
s2, detecting the plate shape value and carrying out filtering processing;
s3, judging the filtered plate shape value according to the thickness layer;
s4, performing feedback control on the bending roller based on the wave-shaped target value;
s5, controlling the wave shape of the strip steel in sections through bending rolls;
the hot-rolled strip steel wave shape feedback control method based on the sliding average filtering comprises the steps of carrying out the sliding average filtering processing on an actual wave shape value detected at an outlet of a finish rolling F7 rack, extracting trend changes of the wave shape according to the deviation of the actual wave shape and a target wave shape after the sliding average filtering processing on an F7 rack, dynamically adjusting the bending force of an F7, carrying out real-time feedback adjustment on the shape of a strip steel plate, increasing a fixed bending force based on a head part, increasing the bending force of a middle part and increasing the bending force of a tail part, and thus carrying out sectional control.
Preferably, in the F7 bending roll segment control plate shape function started in step S1, since L1 cannot recognize the steel grade, it is necessary to issue an identifier of a commissioning program through L2, and issue an identifier of the steel grade through L2, so that the L1 program starts the F7 bending roll segment control plate shape function through the identifier.
Preferably, the plate shape value related to step S2 is detected, and filtering is performed, in which after the flatness meter detects data, the collected wave shape values are arranged into a queue with a length N according to the detected actual plate shape value and a time delay is performed, and filtering is performed.
Preferably, the filtered shape value related to step S3 is determined according to the thickness level, and based on the filtering processing related to step S2, when the queue length of the acquired shape value is smaller than N, the filter does not output;
when the length of the collected wave-shaped value is N, outputting the arithmetic mean value of the queue;
and when the next acquisition cycle comes, adding a new datum, removing an old datum, outputting the arithmetic mean value of the queue again, and so on until the pinch roll bites steel, and finishing the filtering treatment.
Preferably, the parameters of the moving average filter are set as follows:
queue length N: 6; the acquisition period Ts: 200 ms; delay time: 1 s;
and (3) wave shape value arrangement filtering processing:
n: the number of data of the acquisition points is the number;
for example, if N is 6, the method means that 6 flatness data are collected to obtain an average value;
when the strip steel flatness data sampling number is more than 6, starting sliding filter calculation, and obtaining a first group of strip steel flatness values cf after sliding filter 6 It is equal to the average of the first six flatness data comprising the current sample value C6, i.e.:
after the next measured flatness value C7 is collected, the first data C1 in the sequence is discarded, then the average value of 6 forward data C2-C7 of the current sampled value C7 is calculated, and the data are processed and the like.
Preferably, the roll bending in step S4 is feedback-controlled based on the target wavy value, the feedback-controlled based on the target wavy value, and the filtered strip shape value is determined according to the thickness layer, and the determination is as follows:
if the detected plate shape filter value is larger than the target value interval, F7 increases the roller bending force;
if the detected plate shape filter value is smaller than the target value interval, F7 roll bending force reduction is carried out, and the roll bending force reduction and the roll bending adopt operation keys to output signals;
if the detected plate shape filter value is in the target value range, F7 roller bending force is maintained.
Preferably, the bending roll related to the step S4 is subjected to feedback control based on the wave-shaped target value, the feedback is stopped after the pinch roll bites steel, and the automatic roll bending force adjustment is cleared after the flying shear cuts the tail.
Preferably, the strip steel wave shape is controlled by the bending roll in a segmented manner in step S5, flatness data are obtained based on filtering, the bending roll is adjusted, a wave shape control interval is tracked on a flat machine according to a real object, a reasonable control interval is formulated according to the real object shape and the flatness value, and detailed control of filtering is calculated based on a formula, wherein the strip steel is mainly controlled according to a small middle wave, if the strip steel is a small middle wave, the control interval is reached, the bending roll force does not need to be increased, and if the control interval is not reached, a new bending roll force needs to be calculated according to the formula, so that the strip steel wave shape is controlled by the bending roll in a segmented manner.
Preferably, the roll force output is established as follows:
Δ bend: increased F7 fixed roll bending force is required;
flt: 1S-2S wave-shaped mean value of the head of the strip steel;
FLT is the median of the control interval of the strip steel wave shape target value;
steel: l2 sends down a code of L1 steel grade;
w is the width of the finished strip steel product;
h, the thickness of the finished strip steel product;
if FLT-FLT is less than or equal to 0, no adjustment is performed.
The beneficial effects of the invention are as follows: by setting target wave shape values of different specifications of steel types, the rolling process carries out real-time feedback control on the plate shape to achieve the expected plate shape, automatic regulation and control of the strip steel wave shape are realized, the strip steel wave shape defects are reduced, and meanwhile, the manual intervention load is reduced.
In conclusion, the method for controlling the plate shape by the bending roller in a segmented manner realizes automatic regulation and control of the strip steel wave shape, reduces the strip steel wave shape defects, and reduces the manual intervention load.
Drawings
FIG. 1 is a step diagram of a method for controlling a plate shape by bending rolls according to the present invention.
FIG. 2 is a schematic diagram of the plate shape detection of the method for controlling the plate shape by bending rollers in sections according to the invention.
Detailed Description
The following will clearly and completely describe the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The method for controlling the plate shape by the bending roll in a segmented manner comprises the following steps:
s1, starting an F7 bending roll section control plate shape function;
s2, detecting the plate shape value and carrying out filtering processing;
s3, judging the filtered plate shape value according to the thickness layer;
s4, performing feedback control on the bending roller based on the wave-shaped target value;
s5, controlling the wave shape of the strip steel in sections through bending rolls;
the hot-rolled strip steel wave shape feedback control method based on the sliding average filtering comprises the steps of carrying out the sliding average filtering processing on an actual wave shape value detected at an outlet of a finish rolling F7 rack, extracting trend changes of the wave shape according to the deviation of the actual wave shape and a target wave shape after the sliding average filtering processing on an F7 rack, dynamically adjusting the bending force of an F7, carrying out real-time feedback adjustment on the shape of a strip steel plate, increasing a fixed bending force based on a head part, increasing the bending force of a middle part and increasing the bending force of a tail part, and thus carrying out sectional control.
In the F7 bending roll segment control plate shape function started in step S1, since L1 cannot recognize the steel grade, it is necessary to issue an identifier bit of a commissioning program through L2, and issue an identifier bit of the steel grade through L2, so that the L1 program starts the F7 bending roll segment control plate shape function through the identifier bit.
Detecting the plate shape value related to the step S2, performing filtering processing, delaying a period of time according to the detected actual plate shape value after detecting data by the flatness meter, and arranging the collected wave shape values into a queue with a length of N, and performing filtering processing.
The step S3 is to determine the filtered shape value according to the thickness level, and based on the filtering process in the step S2, the filter does not output the filtered shape value when the queue length of the collected shape value is smaller than N;
when the length of the collected wave-shaped value is N, outputting the arithmetic mean value of the queue;
and when the next acquisition cycle comes, adding a new datum, removing an old datum, outputting the arithmetic mean value of the queue again, and so on until the pinch roll bites steel, and finishing the filtering processing.
The parameters of the moving average filter are set as follows:
queue length N: 6; the acquisition period Ts: 200 ms; delay time: 1 s;
and (3) wave shape value arrangement filtering processing:
n: the number of data of the acquisition points is the number;
for example, if N is 6, the method means that 6 flatness data are collected to obtain an average value;
when the strip steel flatness data sampling number is more than 6, starting sliding filter calculation, and obtaining a first group of strip steel flatness values cf after sliding filter 6 It is equal to the average of the first six flatness data comprising the current sample value C6, i.e.:
after the next measured flatness value C7 is collected, the first data C1 in the sequence is discarded and then countedCalculating the average value of 6 forward samples C7 of C2-C7, processing the data and so on.
The bending roll according to the wave-shaped target value related to the step S4 is feedback-controlled based on the wave-shaped target value, and the filtered strip shape value is judged according to the thickness layer, and the judgment is as follows:
if the detected plate shape filter value is larger than the target value interval, F7 increases the roller bending force;
if the detected plate shape filter value is smaller than the target value interval, F7 roll bending force reduction is carried out, and the roll bending force reduction and the roll bending adopt operation keys to output signals;
if the detected plate shape filter value is in the target value range, F7 roller bending force is maintained.
And S4, performing feedback control on the bending roll based on the wave-shaped target value, stopping feedback after the pinch roll bites steel, and clearing the automatically adjusted bending roll force after the flying shear cuts the tail.
The strip steel wave shape is controlled in a segmented mode through the bending rollers in the step S5, flatness data are obtained based on filtering, the bending rollers are adjusted, a wave shape control interval is tracked on a flat machine according to a real object, meanwhile, a reasonable control interval is formulated according to the shape condition and the flatness value of the real object, and the detail control of filtering is calculated based on a formula, wherein the strip steel is mainly controlled according to a small middle wave, if the strip steel is the small middle wave, the control interval is reached, the bending roller force does not need to be increased, and if the control interval is not reached, the new bending roller force needs to be calculated according to the formula, so that the strip steel wave shape is controlled in a segmented mode through the bending rollers.
The roll bending force output is established according to the following formula:
Δ bend: increased F7 fixed roll bending force is required;
flt: 1S-2S wave-shaped mean value of the head of the strip steel;
FLT, median of band steel wave shape target value control interval;
steel: l2 sends down a code of L1 steel grade;
w is the width of the finished strip steel product;
h, the thickness of the finished strip steel product;
if FLT-FLT is less than or equal to 0, no adjustment is performed.
Examples
A method for controlling the shape of a bending roll in a segmented mode is a hot-rolled strip steel wave shape feedback control method based on sliding average filtering, the sliding average filtering processing is carried out on the actual wave shape value detected at the outlet of a finish rolling F7 rack, the trend change of the wave shape is extracted from an F7 rack according to the deviation between the actual wave shape and the target wave shape after the sliding average filtering processing, the F7 bending roll force is dynamically adjusted, and the real-time feedback adjustment is carried out on the shape of a strip steel.
Because L1 can not identify the steel grade, the identification position of the commissioning program needs to be issued through L2, the identification position of the steel grade is issued through L2, and the L1 program starts the F7 bending roll sectional plate shape control function through the identification position.
After the flatness instrument detects data, according to the detected actual plate shape value, delaying for a period of time, arranging the collected wave shape values into a queue with the length of N, and carrying out filtering processing, wherein when the queue length is less than N, the filter does not output; when the length is N, outputting the arithmetic mean value of the queue; when the next acquisition cycle comes, adding a new datum, removing an old datum, outputting the arithmetic mean value of the queue again, and so on until the pinch roll bites steel, finishing the filtering treatment, and setting the parameters of the moving average filter as follows:
queue length N: 6; the acquisition period Ts: 200 ms; delay time: 1s, and then the reaction solution is added.
Wave-shaped target value feedback control: judging the filtered plate shape value according to the thickness layer, and if the detected plate shape filtering value is larger than the target value interval, increasing the roll bending force by F7; if the detected plate shape filter value is smaller than the target value interval, F7 roll bending force reduction is carried out, and the roll bending force reduction and the roll bending adopt operation keys to output signals; and if the detected plate shape filtering value is in the target value range, maintaining the F7 roller bending force, stopping feedback after the pinch roll bites steel, and resetting the automatically adjusted roller bending force after the flying shear cuts the tail.
Other matters are described as follows: the manual roll bending intervention learning function of F7 is turned off when the function is put into use. If manual intervention is performed in the process, the automatic control function is disconnected.
By exploring the relationship between the plate shape and the bending roll, the development and application of the plate shape control method are formed, the automatic control of the plate shape is realized, the plate shape control precision is improved, and the manual intervention is greatly reduced.
Wave shape value arrangement filtering processing:
n: the number of data of the acquisition points is the number;
for example, if N is 6, the method means that 6 flatness data are collected to obtain an average value;
when the strip steel flatness data sampling number is more than 6, starting sliding filter calculation, and obtaining a first group of strip steel flatness values cf after sliding filter 6 It is equal to the average of the first six flatness data comprising the current sample value C6, i.e.:
after the next measured flatness value C7 is collected, the first data C1 in the sequence is discarded, then the average value of 6 forward data C2-C7 of the current sampled value C7 is calculated, and the data are processed and the like.
Is characterized in that: and defining the acquisition frequency according to the acquisition cycle condition and data processing.
The function is as follows: the method mainly performs smoothing processing on the flatness data and avoids the influence of single-point abnormal values.
No filtering processing is performed, and data jitter is large; with the filtering process, the data is relatively smooth.
The filtering is mainly used for obtaining accurate flatness data and plays a great role in the subsequent roll bending regulation.
The wave-shaped control interval is a reasonable control interval which is made according to the condition that the real object is tracked on a flattening machine and the shape and the flatness value of the real object.
The filtering detail control follows the above formula. The strip steel is mainly controlled according to the micro-moderate wave, if the strip steel is the micro-moderate wave, the strip steel reaches a control interval, and the roll bending force does not need to be increased. If the roll bending force does not reach the control interval, the newly increased roll bending force needs to be calculated according to a formula.
And (3) segmented control: the method is mainly based on the fact that a fixed roller bending force is added to the head, the roller bending force can be added to the middle of the tail, and the roller bending force is added to the tail. This patent is mainly to the head increases fixed roll bending force.
Example 2
Experimental data
a. Through tests, the relation between the wave shape and the roll bending adjustment is found, and the roll bending force condition is required for adjusting the-10 IU wave shape according to different hardness, thickness and width.
b. And through data arrangement, the required roll bending force of-10 IU is respectively regulated for each layer.
| hard | thick | width | -10IU | hard | thick | width | -10IU |
| 1 | 1 | 1 | 32 | 3 | 1 | 1 | 52 |
| 1 | 1 | 2 | 30 | 3 | 1 | 2 | 40 |
| 1 | 1 | 3 | 24 | 3 | 1 | 3 | 30 |
| 1 | 1 | 4 | 14 | 3 | 1 | 4 | 20 |
| 1 | 2 | 1 | 65 | 3 | 2 | 1 | 85 |
| 1 | 2 | 2 | 50 | 3 | 2 | 2 | 61 |
| 1 | 2 | 3 | 39 | 3 | 2 | 3 | 45 |
| 1 | 2 | 4 | 27 | 3 | 2 | 4 | 33 |
| 1 | 3 | 1 | 94 | 3 | 3 | 1 | 114 |
| 1 | 3 | 2 | 65 | 3 | 3 | 2 | 75 |
| 1 | 3 | 3 | 47 | 3 | 3 | 3 | 53 |
| 1 | 3 | 4 | 34 | 3 | 3 | 4 | 40 |
| 1 | 4 | 1 | 115 | 3 | 4 | 1 | 120 |
| 1 | 4 | 2 | 83 | 3 | 4 | 2 | 80 |
| 1 | 4 | 3 | 58 | 3 | 4 | 3 | 65 |
| 1 | 4 | 4 | 43 | 3 | 4 | 4 | 49 |
| 2 | 1 | 1 | 42 | 4 | 1 | 1 | 62 |
| 2 | 1 | 2 | 35 | 4 | 1 | 2 | 43 |
| 2 | 1 | 3 | 27 | 4 | 1 | 3 | 32 |
| 2 | 1 | 4 | 17 | 4 | 1 | 4 | 23 |
| 2 | 2 | 1 | 75 | 4 | 2 | 1 | 95 |
| 2 | 2 | 2 | 55 | 4 | 2 | 2 | 64 |
| 2 | 2 | 3 | 42 | 4 | 2 | 3 | 47 |
| 2 | 2 | 4 | 30 | 4 | 2 | 4 | 35 |
| 2 | 3 | 1 | 104 | 4 | 3 | 1 | 128 |
| 2 | 3 | 2 | 70 | 4 | 3 | 2 | 83 |
| 2 | 3 | 3 | 50 | 4 | 3 | 3 | 59 |
| 2 | 3 | 4 | 37 | 4 | 3 | 4 | 45 |
| 2 | 4 | 1 | 115 | 4 | 4 | 1 | 133 |
| 2 | 4 | 2 | 88 | 4 | 4 | 2 | 87 |
| 2 | 4 | 3 | 62 | 4 | 4 | 3 | 63 |
| 2 | 4 | 4 | 46 | 4 | 4 | 4 | 50 |
c. The relation of hardness, width and thickness is fitted by taking the hardness of 4 layers (the hardness is 6-8), the width of 1 layer (the width is less than 1000mm) and the thickness of 1 layer (the width is 2.1mm) as the reference, wherein the wave shape of-10 IU is adjusted by the layers and 62KN bending roll force is needed.
Hardness relationship:
the width relation is as follows:
thickness relationship:
finally, a roll bending force output formula is established:
Δ bend: increased F7 fixed roll bending force is required;
flt: 1S-2S wave-shaped mean value of the head of the strip steel;
FLT, median of band steel wave shape target value control interval;
steel: l2 sends down a code of L1 steel grade;
w is the width of the finished strip steel product;
h, the thickness of the finished strip steel product;
if FLT-FLT is less than or equal to 0, no adjustment is performed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The method for controlling the plate shape by the bending roll in a subsection manner is characterized by comprising the following steps of:
s1, starting an F7 bending roll section control plate shape function;
s2, detecting the plate shape value and carrying out filtering processing;
s3, judging the filtered plate shape value according to the thickness layer;
s4, performing feedback control on the bending roller based on the wave-shaped target value;
s5, controlling the wave shape of the strip steel in sections through bending rolls;
the hot-rolled strip steel wave shape feedback control method based on the sliding average filtering comprises the steps of carrying out the sliding average filtering processing on an actual wave shape value detected at an outlet of a finish rolling F7 rack, extracting trend changes of the wave shape according to the deviation of the actual wave shape and a target wave shape after the sliding average filtering processing on an F7 rack, dynamically adjusting the bending force of an F7, carrying out real-time feedback adjustment on the shape of a strip steel plate, increasing a fixed bending force based on a head part, increasing the bending force of a middle part and increasing the bending force of a tail part, and thus carrying out sectional control.
2. The method for controlling plate shape by bending roll segments according to claim 1, wherein the step S1 is executed to start the function of controlling plate shape by bending roll segments according to F7, which requires issuing an identifier of a commissioning program through L2 and issuing an identifier of a steel grade through L2 because L1 cannot identify the steel grade, so that the L1 program starts the function of controlling plate shape by bending roll segments according to F7 through the identifier.
3. The method for roll bending subsection shape control of claim 1, wherein the shape values are detected in step S2, and filtering is performed by arranging the collected wave shape values into a queue of length N for filtering after detecting data by the flatness meter and delaying a period of time according to the detected actual shape values.
4. The method for roll bending subsection shape control of claim 1, wherein the step S3 relates to the judgment of the filtered shape value according to the thickness level, and based on the filtering process related to the step S2, when the queue length of the collected wave shape value is less than N, the filter does not output;
when the length of the collected wave-shaped value is N, outputting the arithmetic mean value of the queue;
and when the next acquisition cycle comes, adding a new datum, removing an old datum, outputting the arithmetic mean value of the queue again, and so on until the pinch roll bites steel, and finishing the filtering treatment.
5. The method of claim 4, wherein the moving average filter is set to have the following parameters:
queue length N: 6; the acquisition period Ts: 200 ms; delay time: 1 s;
the wave shape value arrangement filtering processing:
n: the number of data of the acquisition points is the number;
for example, if N is 6, the method means that 6 flatness data are collected to obtain an average value;
when the strip steel flatness data sampling number is more than 6, starting sliding filter calculation, and obtaining a first group of strip steel flatness values cf after sliding filter 6 It is equal to the average of the first six flatness data comprising the current sample value C6, i.e.:
after the next measured flatness value C7 is collected, the first data C1 in the sequence is discarded, then the average value of 6 forward data C2-C7 of the current sampled value C7 is calculated, and the data are processed and the like.
6. The method for roll bending subsection shape control of claim 1, wherein the roll bending step of step S4 is a feedback control based on the target value of the wave shape, and the feedback control is based on the target value of the wave shape, and the filtered shape value is determined according to the thickness layer, and the determination is as follows:
if the detected plate shape filter value is larger than the target value interval, F7 increases the roller bending force;
if the detected plate shape filter value is smaller than the target value interval, F7 roll bending force reduction is carried out, and the roll bending force reduction and the roll bending adopt operation keys to output signals;
if the detected plate shape filter value is in the target value range, F7 roller bending force is maintained.
7. The method for controlling plate shape by sections of the bending roll according to claim 6, wherein the bending roll is subjected to feedback control based on the wave-shaped target value related to the step S4, the feedback is stopped after a pinch roll bites steel, and the automatic roll bending force adjustment is cleared after flying shear tailing.
8. The method for controlling strip shape by bending roll segments according to claim 1, wherein the step S5 relates to controlling strip shape by bending roll segments, which obtains flatness data based on filtering, adjusts the bending roll, and makes reasonable control interval according to the real object on the flattening machine, and the real object shape and flatness value, and calculates the detail control of filtering based on formula, wherein the strip is mainly controlled according to the micro-mesons, if the control interval is reached, the bending roll force does not need to be increased, if the control interval is not reached, the new bending roll force needs to be calculated according to formula, thereby controlling the strip shape by bending roll segments.
9. The method of claim 8, wherein the roll bending force output is established by the following equation:
Δ bend: increased F7 fixed roll bending force is required;
flt: 1S-2S wave-shaped mean value of the head of the strip steel;
FLT, median of band steel wave shape target value control interval;
steel: l2 sends down a code of L1 steel grade;
w is the width of the finished strip steel product;
h, the thickness of the finished strip steel product;
if FLT-FLT is less than or equal to 0, no adjustment is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210473177.8A CN114888096A (en) | 2022-04-29 | 2022-04-29 | Method for controlling plate shape by bending roller in segmented manner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210473177.8A CN114888096A (en) | 2022-04-29 | 2022-04-29 | Method for controlling plate shape by bending roller in segmented manner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114888096A true CN114888096A (en) | 2022-08-12 |
Family
ID=82718955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210473177.8A Pending CN114888096A (en) | 2022-04-29 | 2022-04-29 | Method for controlling plate shape by bending roller in segmented manner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114888096A (en) |
-
2022
- 2022-04-29 CN CN202210473177.8A patent/CN114888096A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106475424B (en) | A kind of control method of Hot Rolling Strip sideslip | |
| CN107838199B (en) | High strength band steel leveling rectifys technique | |
| CN105834225B (en) | Thickness control method and system for dynamic variable-specification rolling of cold continuous rolling mill | |
| CN111014307B (en) | Rolling mill speed control method for continuous rolling of furnace coil and finishing mill set | |
| CN109570241B (en) | Wedge-shaped control method with deviation protection | |
| CN103464471A (en) | Automatic gauge control (AGC) self-adaptive control method for hot rolling mill | |
| CN107413856B (en) | It is a kind of that roller method is removed based on the change online roll change of specification of ESP mm finishing mill unit | |
| CN110434172B (en) | Load distribution calculation method for continuous rolling of furnace coil and finishing mill group | |
| CN105251780A (en) | Control method for ductility fluctuation of temper mill | |
| CN104148404A (en) | Hot rolled strip flatness automatic control method | |
| CN110899338A (en) | Preparation method of hot-rolled strip steel | |
| CN114178314A (en) | Low-alloy high-strength hot-rolled coil Q390C rolling process | |
| CN114888096A (en) | Method for controlling plate shape by bending roller in segmented manner | |
| CN107234135B (en) | One kind being suitable for hot tandem and exports belt steel surface roughness control method | |
| CN114472542B (en) | Plate shape control method, device and equipment in hot rolled strip steel production process | |
| US7137434B1 (en) | Continuous roll casting of ferrous and non-ferrous metals | |
| CN116900051A (en) | Steel turning mode and rolling system optimization setting method for rough rolling process of medium plate | |
| CN110576048B (en) | Steel plate temperature control device of hot rolling endless rolling production line | |
| CN110293135B (en) | Dynamic feedforward control method for rough rolling width | |
| CN114632823B (en) | Method for improving prediction precision of rolling force model of wide and thick plate | |
| JP4598580B2 (en) | Cooling control method, apparatus, and computer program | |
| CN114367544A (en) | Hot continuous rolling steady-state deviation rectifying control model | |
| CN111842504B (en) | Novel cold continuous rolling mill hot strip soft start thickness control method and system | |
| CN114417236B (en) | Steel rolling product quality optimization control method based on data evaluation | |
| KR101438774B1 (en) | Rolling mill and rolling method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |