CN111346926A - Control method for roll bending force of temper mill - Google Patents
Control method for roll bending force of temper mill Download PDFInfo
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- CN111346926A CN111346926A CN202010139950.8A CN202010139950A CN111346926A CN 111346926 A CN111346926 A CN 111346926A CN 202010139950 A CN202010139950 A CN 202010139950A CN 111346926 A CN111346926 A CN 111346926A
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- 238000013000 roll bending Methods 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000005096 rolling process Methods 0.000 claims abstract description 185
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 101
- 239000010959 steel Substances 0.000 claims abstract description 101
- 238000005452 bending Methods 0.000 claims abstract description 75
- 230000001105 regulatory effect Effects 0.000 claims abstract description 41
- 230000001276 controlling effect Effects 0.000 claims abstract description 10
- 238000004590 computer program Methods 0.000 claims description 15
- 238000003860 storage Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 3
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- 230000008859 change Effects 0.000 description 7
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- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
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- 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
- B21B37/58—Roll-force control; Roll-gap control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
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Abstract
The invention discloses a method for controlling the roll bending force of a temper mill, which comprises the following steps: acquiring a first roll bending force set value of the current rolled strip steel; acquiring the rolling force feedforward adjustment quantity of the current rolled strip steel in the Nth scanning period; obtaining a second roll bending force set value of the current rolled strip steel in the Nth scanning period based on the sum of the first roll bending force set value and the rolling force feedforward regulating quantity, wherein N is a positive integer; and outputting a roll bending force control quantity to the servo valve based on the second roll bending force set value, so that the servo valve drives the roll bending cylinder to act according to the roll bending force control quantity, and the roll bending of the roll is realized. The method and the device utilize the rolling force feedforward adjustment quantity to adjust the bending force, so that the bending force of the Nth scanning period is matched with the rolling force, the roll bending quantity of the roller is adjusted, the deformation quantity of the roller is further compensated, and the problems of medium waves, edge waves and edge creases of the rolled strip steel caused by the deformation of the roller are avoided.
Description
Technical Field
The invention relates to the technical field of planisher rolling, in particular to a method for controlling the roll bending force of a planisher.
Background
A leveler in a continuous annealing production line is used for rolling strip steel, and mainly aims to improve the flatness of the annealed strip steel, eliminate the yield platform of the strip steel and improve the surface quality.
However, in the rolling process of the temper mill, the rolled strip steel often has quality defects such as medium waves, edge creases and the like, so that the rolled strip steel leveled by the temper mill does not meet the requirements of customers or the subsequent processing requirements.
Disclosure of Invention
The embodiment of the application provides a method for controlling the roll bending force of the temper mill, and solves the technical problems that in the prior art, the rolling force is not matched with the roll bending force, and quality defects such as medium waves, edge creases and the like occur.
In a first aspect, the present application provides the following technical solutions through an embodiment of the present application:
a method for controlling the bending force of a temper mill is applied to a bending force control system of the temper mill, the bending force control system is connected with a servo valve, and the servo valve is connected with a bending cylinder, and the method comprises the following steps: acquiring a first roll bending force set value of the current rolled strip steel, wherein the first roll bending force set value is an original roll bending force set value of the roll bending force control system; acquiring a rolling force feedforward adjustment quantity of the current rolled strip steel in an Nth scanning period, wherein the rolling force feedforward adjustment quantity is used for performing feedforward adjustment on the rolling force of the current rolled strip steel in a rolling force control system, and the Nth scanning period refers to scanning an internal execution program for the Nth time in the rolling process of the current rolled strip steel; obtaining a second roll bending force set value of the current rolled strip steel in the Nth scanning period based on the sum of the first roll bending force set value and the rolling force feedforward regulating quantity, wherein N is a positive integer; and outputting a roll bending force control quantity to the servo valve based on the second roll bending force set value, so that the servo valve drives the roll bending cylinder to act according to the roll bending force control quantity, and the roll bending of the roll is realized.
In one embodiment, the roll force feed forward adjustment for the current coil of rolled strip is derived based on the following equation: fw_f﹦∑α*η*(Fi+1-Fi) (ii) a Wherein i is a positive integer, i is taken from 1 to N-2 in sequence, Fw_fFeeding forward the adjustment quantity for the rolling force of the current rolled strip steel in the Nth scanning period; fi+1A rolling force obtained in an i +1 th scanning period by scanning an internal execution program for the rolling force control system based on a specific frequency; fiThe rolling force control system scans the internal execution program based on the specific frequency and obtains the rolling force in the ith scanning period, α is an adjusting coefficient, η is a width coefficient related to the current rolled steel strip coil, and N is a positive integer greater than 2.
In one embodiment, α is 0.3.
In one embodiment, when W is less than or equal to 800mm, η is 0.4, when 800mm < W is less than or equal to 1000mm, η is 0.35, when 900mm < W is less than or equal to 1000mm, η is 0.3, when 1000mm < W is less than or equal to 1200mm, η is 0.25, when W is greater than 1200mm, η is 0.2, wherein W is the width of the current rolled strip.
In one embodiment, after outputting the roll force control amount to the servo valve based on the second roll force setting value, the method further includes: and when the current rolled strip steel is rolled, resetting the rolling force feedforward regulating quantity, and acquiring the rolling force feedforward regulating quantity of the next rolled strip steel.
In one embodiment, when the rolling of the current coil of rolled strip steel is completed, the method specifically includes: and when the welding line to the frame signal is monitored, determining that the rolling of the current rolled strip steel is finished.
In a second aspect, based on the same inventive concept, the present application provides the following technical solutions through an embodiment of the present application:
the utility model provides a leveling machine roll bending force's control system, control system is connected with the servo valve, the servo valve is connected with the roll bending jar, includes: the first acquisition module is used for acquiring a first bending force set value of the current rolled strip steel, wherein the first bending force set value is an original bending force set value of the bending force control system; the second acquisition module is used for acquiring a rolling force feedforward adjustment quantity of the current rolled strip steel in the Nth scanning period, wherein the rolling force feedforward adjustment quantity is used for performing feedforward adjustment on the rolling force of the current rolled strip steel in a rolling force control system, and the Nth scanning period refers to scanning of an internal execution program for the Nth time in the rolling process of the current rolled strip steel; the obtaining module is used for obtaining a second roll bending force set value of the current rolled strip steel in the Nth scanning period based on the sum of the first roll bending force set value and the rolling force feedforward regulating quantity, wherein N is a positive integer; and the output module is used for processing based on the second roll bending force set value and outputting roll bending force control quantity to the servo valve so that the servo valve drives the roll bending cylinder to act according to the roll bending force control quantity to realize roll bending of the roll.
In a third aspect, based on the same inventive concept, the present application provides the following technical solutions through an embodiment of the present application:
an electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the processor when executing the program may perform the method steps as in any of the embodiments described above.
In a fourth aspect, based on the same inventive concept, the present application provides the following technical solutions through an embodiment of the present application:
a computer storage medium having stored thereon a computer program which, when executed by a processor, may carry out the method steps of any of the embodiments described above.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the inventors have found in the course of long-term research that when elongation is put into an automatic control mode, a rolling force control system adjusts rolling force by feedback adjustment as well as feed-forward adjustment to achieve automatic control of elongation, during which the rolling force will vary rapidly with the speed, elongation, etc. of a rolled strip. However, the rolling of the roll is realized by the pressing of the press cylinders at the two ends of the roll, the roll is deformed during the pressing of the press cylinders, and particularly, when the rolling force is increased, the deformation of the roll is increased, thereby causing the problems of wave, edge wave and edge crease in the rolled strip steel. According to the method, the characteristic that the rolling force feedforward regulating variable can represent the change direction of the rolling force in the Nth scanning period is utilized, the set value of the bending force is regulated through the rolling force feedforward regulating variable, the bending force in the Nth scanning period is matched with the rolling force, the bending amount of the roller is regulated, the deformation of the roller is further compensated, and therefore the problems of medium waves, edge waves and edge creases of the rolled strip steel caused by the deformation of the roller are solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flowchart of a control method for preventing strip steel from throwing into an acid tank according to a preferred embodiment of the present application;
FIG. 2 is a block diagram of a control system for preventing the throwing of strip steel into an acid tank according to the preferred embodiment of the present invention;
FIG. 3 is a block diagram of an electronic device according to an embodiment of the present disclosure;
fig. 4 is a computer storage medium according to a preferred embodiment of the present application.
Detailed Description
The embodiment of the application provides a control method for preventing strip steel from being thrown into an acid tank, and solves the technical problems that in the prior art, the process for processing the strip steel breakage accident is complicated, the acid rolling capacity is influenced, and potential safety hazards exist.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
a method for controlling the bending force of a temper mill is applied to a bending force control system of the temper mill, the bending force control system is connected with a servo valve, and the servo valve is connected with a bending cylinder, and the method comprises the following steps: acquiring a first roll bending force set value of the current rolled strip steel, wherein the first roll bending force set value is an original roll bending force set value of the roll bending force control system; acquiring a rolling force feedforward adjustment quantity of the current rolled strip steel in an Nth scanning period, wherein the rolling force feedforward adjustment quantity is used for performing feedforward adjustment on the rolling force of the current rolled strip steel in a rolling force control system, and the Nth scanning period refers to scanning an internal execution program for the Nth time in the rolling process of the current rolled strip steel; obtaining a second roll bending force set value of the current rolled strip steel in the Nth scanning period based on the sum of the first roll bending force set value and the rolling force feedforward regulating quantity, wherein N is a positive integer; and outputting a roll bending force control quantity to the servo valve based on the second roll bending force set value, so that the servo valve drives the roll bending cylinder to act according to the roll bending force control quantity, and the roll bending of the roll is realized.
The characteristic that the change direction of the rolling force in the Nth scanning period can be represented by the rolling force feedforward regulating quantity is utilized, the bending force is regulated by the rolling force feedforward regulating quantity, the bending force in the Nth scanning period is matched with the rolling force, the bending amount of the roller is regulated, the deformation of the roller is further compensated, and the problems of medium waves, edge waves and edge creases of the rolled strip steel caused by the deformation of the roller are solved.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example one
As shown in fig. 1, the embodiment provides a method for controlling a bending force of a temper mill, which is applied to a bending force control system of the temper mill, wherein the bending force control system is connected with a servo valve, and the servo valve is connected with a bending cylinder.
In the practical application process, the continuous annealing line is a single-frame six-roller CVC (chemical vapor deposition) temper mill which is arranged at an outlet section of the continuous annealing line and is used for continuously flattening annealed strip steel.
The system of the single-frame six-roller CVC planisher mainly comprises: the high-pressure station of the temper mill, a wet temper system, a roll changing system, a plate type control system, a tension control system, a rolling force control system (HGC), an elongation control system and a roll bending system. Only the roll bending system and the rolling force control system (HGC) according to the present application will be described below.
A roll bending system: the positive and negative bending is generated on the roller, the roller shape and the force distribution of the roller are changed, and therefore the control of the plate shape is achieved, and the method specifically comprises the following steps: a roll bending force control system and an actuating mechanism. The actuating mechanism consists of 4 roller bending hydraulic cylinders and 8 roller bending blocks, each two roller bending blocks are internally provided with a roller bending cylinder, positive and negative roller bending forces are completed through the 4 roller bending cylinders, and the roller bending cylinders are controlled by a servo valve in a servo mode; roll bending force control system: and receiving a set value of the bending force, calculating the received set value of the bending force through an internal PI proportional-integral controller to obtain a controlled quantity of the bending force, and sending the obtained controlled quantity of the bending force to a servo valve. It should be noted that the roll bending force setting value is composed of two parts, one is a setting value from 2-level or manually input by an operator, and the other is a roll bending adjustment quantity obtained by the plate profile instrument according to the actually measured plate profile.
The elongation is the percentage of the ratio of the deformation of a gauge length section to the length of an original gauge length section after a strip steel is stretched, and the calculation formula is as follows, delta is delta L/L × 100%, while strip steel flattening is a rolling process with small reduction rate, so that the direct detection of the length change of the strip steel before and after flattening is difficult, therefore, the calculation formula of the elongation is usually calculated by the following formula, delta is delta v/v × 100%, so the elongation can be detected by detecting the speed change of a flattening machine before and after.
The control process of the rolling force comprises the following steps: the rolling force control system receives a rolling force set value, calculates the received rolling force set value through an internal PI proportional-integral controller to obtain a rolling force control quantity, and outputs the obtained rolling force control quantity to pressure cylinders at two ends of the roller so as to realize the adjustment of the rolling force of the roller. The rolling force set value received by the rolling force control system consists of a set value from 2-level or manually input by an operator and a rolling force regulating quantity, wherein the rolling force regulating quantity is obtained by adding the rolling force regulating quantity obtained by feedforward regulation and the rolling force regulating quantity obtained by feedback control, and the rolling force regulating quantity obtained by the feedforward regulation is obtained by obtaining the interference quantity influencing the elongation rate in advance. The partial rolling force regulating quantity acts on a rolling force control system to form open loop control on the rolling force, so that the interference can be inhibited in advance before the elongation rate is deviated; the rolling force regulating quantity of the feedback control is from the closed-loop PI control of an elongation percentage control system, namely, the deviation of the elongation percentage (the difference value between the set elongation percentage value and the actual elongation percentage value) is used as the input value of a PI controller in the elongation percentage control system, and the rolling force regulating quantity of the feedback control is obtained through the calculation of the PI controller.
The inventor finds in the long-term research that when the elongation is put into the automatic control mode, the rolling force control system adjusts the rolling force in real time through the feedback adjustment and the feedforward adjustment so as to realize the automatic control of the elongation, and when the elongation is ensured to be constant, the rolling force changes in real time and the rolling force is increased, the deformation of the roller is increased, thereby causing the problems of wave, edge wave and edge folding mark in the rolled strip steel.
In view of the above problem, the present embodiment provides the following method, including:
step S101: acquiring a first bending force set value of the current rolled strip steel, wherein the first bending force set value is an original bending force set value of a bending force control system; specifically, the first bending force set value is a bending force set value received by a bending force control system in the prior art, and includes a set value manually input by a secondary issuing or operator and a roll bending adjustment amount obtained by a plate profile instrument according to an actually measured plate profile. The roll bending force set value issued by the second stage is the roll bending force set value matched from the database by the master control system of the upper stage of the roll bending force control system according to the specification and steel type of the current rolled strip steel in the automatic running process of the roll bending force control system.
Step S102: acquiring a rolling force feedforward adjustment quantity of the current rolled strip steel in an Nth scanning period, wherein the rolling force feedforward adjustment quantity is used for performing feedforward adjustment on the rolling force of the current rolled strip steel in a rolling force control system, and the Nth scanning period refers to scanning an internal execution program for the Nth time in the rolling process of the current rolled strip steel; specifically, in the nth scanning period, the internal execution programs of the roll bending force control system and the rolling force control system are scanned for the nth time in the rolling process of the current rolled strip steel.
It should be noted that before the Nth scanning period, the rolling force control system has completed N-1 times of scanning the internal execution program in the rolling process of the current coil of the rolled steel strip. In the completed N-1 times of scanning processes, each time scanning is completed, the rolling force control system executes an internal execution program from beginning to end, and the internal execution program comprises the following steps: and obtaining a set value which is issued in the second level corresponding to the current scanning period or manually input by an operator, re-obtaining the rolling force feedback regulating variable and the rolling force feedforward regulating variable of the current scanning period, further re-obtaining the rolling force set value of the current scanning period, performing proportional integral operation according to the rolling force set value, re-obtaining the rolling force control variable of the current scanning period, and outputting the obtained rolling force control variable to pressure cylinders at two ends of the roller to finish the adjustment of the rolling force of the roller for one time.
Step S103: obtaining a second roll bending force set value of the current rolled strip steel in the Nth scanning period based on the sum of the first roll bending force set value and the rolling force feedforward regulating quantity, wherein N is a positive integer;
step S104: and outputting a roll bending force control quantity to the servo valve based on the second roll bending force set value, so that the servo valve drives the roll bending cylinder to act according to the roll bending force control quantity, and the roll bending of the roll is realized.
Specifically, the roll bending force control quantity is obtained by performing proportional and integral operation on a second roll bending force set value by a PI controller in the roll bending force control system.
Since the rolling force feedforward adjustment amount is used for adjusting the magnitude of the rolling force in advance to suppress the disturbance amount before the elongation deviation occurs, the rolling force feedforward adjustment amount can represent the change direction of the rolling force in the nth scanning period, that is, the rolling force feedforward adjustment amount can represent the magnitude of the deformation of the roller. For example: the rolling force needs to be adjusted to be larger by the rolling force feedforward adjustment amount, and then the rolling force feedforward adjustment amount is a positive value. Conversely, if the rolling force feedforward adjustment amount is a positive value, the rolling force increases, and the deformation of the roll increases as the rolling force increases.
The characteristic that the change direction of the rolling force in the Nth scanning period can be represented by the rolling force feedforward regulating quantity is utilized, the bending force is regulated by the rolling force feedforward regulating quantity, the bending force in the Nth scanning period is matched with the rolling force, the bending amount of the roller is regulated, the deformation of the roller is further compensated, and the problems of medium waves, edge waves and edge creases of the rolled strip steel caused by the deformation of the roller are solved.
It should be noted that in the single-stand six-roll CVC temper mill, the roll bending of the roll is negative bending (i.e., the middle of the roll bends upward), and the deformation of the rolling force is positive bending (the middle of the roll bends downward). When the rolling force of the Nth scanning period is predicted to be increased, namely the deformation of the roller is increased, the roller bending force is adjusted by introducing the rolling force feedforward adjustment amount, so that the roller bending force is also increased, the deformation of the roller caused by the increased rolling force is counteracted, and the roller is in a flat state, thereby avoiding the problem of rolling strip steel middle waves caused by the deformation of the roller. When the rolling force of the Nth scanning period is predicted to be reduced, namely the deformation of the roller is reduced, the roller bending force is adjusted by introducing the rolling force feedforward adjustment quantity, so that the roller bending force is reduced, the negative bending of the roller caused by overlarge roller bending force is avoided, and the roller is in a flat state, so that the problems of rolling strip steel edge waves and edge folding marks caused by overlarge roller bending force are avoided.
As an alternative embodiment, the rolling force feed-forward adjustment amount of the current-coil rolled steel strip in the nth scanning period is obtained based on the following equation:
Fw_f﹦∑α*η*(Fi+1-Fi)；
wherein i is a positive integer, i is taken from 1 to N-2 in sequence, Fw_fFeeding forward the adjustment quantity for the rolling force of the current rolled strip steel in the Nth scanning period; fi+1A rolling force obtained in an i +1 th scanning period by scanning an internal execution program for the rolling force control system based on a specific frequency; fiThe rolling force control system scans the internal execution program based on the specific frequency and obtains the rolling force in the ith scanning period, α is an adjusting coefficient, η is a width coefficient related to the current rolled strip steel, and N is a positive integer greater than 2.
The method and the device can obtain the interference quantity influencing the elongation of the Nth scanning period through the rolling force fluctuation of the first N-1 scanning periods by superposing the deviation of the rolling force control quantity in the first N-1 scanning periods before the Nth scanning period.
Specifically, the width factor η associated with the current rolled strip is introduced into the calculation of the rolling force feed forward adjustment because the wider the width of the current rolled strip is, the smaller the amount of roll deformation and the smaller the rolling force feed forward adjustment that needs to be compensated for, considering the same rolling force.
As an alternative embodiment α is 0.3.
As an alternative example, when W is less than 800mm, η is 0.4, when 800mm < W is less than 1000mm, η is 0.35, when 900mm < W is less than 1000mm, η is 0.3, when 1000mm < W is less than 1200mm, η is 0.25, when W is greater than 1200mm, η is 0.2, wherein W is the width of the current coil rolled steel strip.
As an alternative embodiment, after outputting the roll bending force control amount to the servo valve based on the second roll bending force setting value, the method further includes: and when the current rolled strip steel is rolled, resetting the rolling force feedforward regulating quantity, and acquiring the rolling force feedforward regulating quantity of the next rolled strip steel.
As an optional embodiment, when the current coil of rolled strip steel is rolled, the rolling process specifically includes:
and when the welding line to the frame signal is monitored, determining that the rolling of the current rolled strip steel is finished.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
the inventors have found in the course of long-term research that when elongation is put into an automatic control mode, a rolling force control system adjusts rolling force by feedback adjustment as well as feed-forward adjustment to achieve automatic control of elongation, during which the rolling force will vary rapidly with the speed, elongation, etc. of a rolled strip. However, the rolling of the roll is realized by the pressing of the press cylinders at the two ends of the roll, the roll is deformed during the pressing of the press cylinders, and particularly, when the rolling force is increased, the deformation of the roll is increased, thereby causing the problems of wave, edge wave and edge crease in the rolled strip steel. The characteristic that the change direction of the rolling force in the Nth scanning period can be represented by the rolling force feedforward regulating quantity is utilized, the bending force is regulated by the rolling force feedforward regulating quantity, the bending force in the Nth scanning period is matched with the rolling force, the bending amount of the roller is regulated, the deformation of the roller is further compensated, and the problems of medium waves, edge waves and edge creases of the rolled strip steel caused by the deformation of the roller are solved.
Example two
As shown in fig. 2, based on the same inventive concept, the present embodiment provides a system for controlling a bending force of a leveler, comprising:
a first obtaining module 201, configured to obtain a first bending force set value of a currently rolled strip steel, where the first bending force set value is an original bending force set value of a bending force control system;
a second obtaining module 202, configured to obtain a rolling force feedforward adjustment amount of the current rolled strip steel in an nth scanning period, where the rolling force feedforward adjustment amount is used to feedforward-adjust a rolling force of the current rolled strip steel in a rolling force control system;
an obtaining module 203, configured to obtain a second bending force setting value of the current rolled strip steel in the nth scanning period based on a sum of the first bending force setting value and the rolling force feedforward adjustment amount, where N is a positive integer;
and the output module 204 is configured to output a roll bending force control amount to the servo valve based on the second roll bending force set value, so that the servo valve drives the roll bending cylinder to act according to the roll bending force control amount, so as to realize roll bending of the roll.
As an alternative embodiment, the second obtaining module 202 obtains the rolling force feed-forward adjustment amount of the current rolled steel strip in the nth scanning period based on the following equation:
Fw_f﹦∑α*η*(Fi+1-Fi)；
wherein i is a positive integer, i is taken from 1 to N-2 in sequence, Fw_fFeeding forward the adjustment quantity for the rolling force of the current rolled strip steel in the Nth scanning period; fi+1A rolling force obtained in an i +1 th scanning period by scanning an internal execution program for the rolling force control system based on a specific frequency; fiFor the rolling force control system based onThe specific frequency scans the internal execution program and obtains the rolling force in the ith scanning period, α is an adjusting coefficient, η is a width coefficient related to the current rolled strip steel, and N is a positive integer greater than 2.
As an alternative embodiment α is 0.3.
As an alternative example, when W is less than 800mm, η is 0.4, when 800mm < W is less than 1000mm, η is 0.35, when 900mm < W is less than 1000mm, η is 0.3, when 1000mm < W is less than 1200mm, η is 0.25, when W is greater than 1200mm, η is 0.2, wherein W is the width of the current coil rolled steel strip.
As an optional embodiment, the second obtaining module 202 is further configured to zero the rolling force feedforward adjustment amount when the current rolled strip steel roll is rolled, and obtain the rolling force feedforward adjustment amount of the next rolled strip steel roll.
As an alternative embodiment, the second obtaining module 202 is further configured to determine that the currently rolled strip steel is completely rolled when the weld-to-stand signal is detected.
EXAMPLE III
As shown in fig. 3, based on the same inventive concept, the present embodiment provides an electronic device 300, including: a memory 310, a processor 320 and a computer program 311 stored on the memory 310 and executable on the processor 320, wherein the processor 320 when executing the program 311 may implement the following method steps:
acquiring a first roll bending force set value of the current rolled strip steel, wherein the first roll bending force set value is an original roll bending force set value of the roll bending force control system; acquiring a rolling force feedforward adjustment quantity of the current rolled strip steel in an Nth scanning period, wherein the rolling force feedforward adjustment quantity is used for performing feedforward adjustment on the rolling force of the current rolled strip steel in a rolling force control system, and the Nth scanning period refers to scanning an internal execution program for the Nth time in the rolling process of the current rolled strip steel; obtaining a second roll bending force set value of the current rolled strip steel in the Nth scanning period based on the sum of the first roll bending force set value and the rolling force feedforward regulating quantity, wherein N is a positive integer; and outputting a roll bending force control quantity to the servo valve based on the second roll bending force set value, so that the servo valve drives the roll bending cylinder to act according to the roll bending force control quantity, and the roll bending of the roll is realized.
In a specific implementation, when the processor 320 executes the program 311, any method steps in the first embodiment may also be implemented.
Example four
As shown in fig. 4, based on the same inventive concept, the present embodiment provides a computer-readable storage medium 400, on which a computer program 411 is stored, the computer program 411 implementing the following steps when executed by a processor:
acquiring a first roll bending force set value of the current rolled strip steel, wherein the first roll bending force set value is an original roll bending force set value of the roll bending force control system; acquiring a rolling force feedforward adjustment quantity of the current rolled strip steel in an Nth scanning period, wherein the rolling force feedforward adjustment quantity is used for performing feedforward adjustment on the rolling force of the current rolled strip steel in a rolling force control system, and the Nth scanning period refers to scanning an internal execution program for the Nth time in the rolling process of the current rolled strip steel; obtaining a second roll bending force set value of the current rolled strip steel in the Nth scanning period based on the sum of the first roll bending force set value and the rolling force feedforward regulating quantity, wherein N is a positive integer; and outputting a roll bending force control quantity to the servo valve based on the second roll bending force set value, so that the servo valve drives the roll bending cylinder to act according to the roll bending force control quantity, and the roll bending of the roll is realized.
In a specific implementation, the computer program 411 may implement any of the method steps of the first embodiment when executed by a processor.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A method for controlling the bending force of a temper mill is applied to a bending force control system of the temper mill, the bending force control system is connected with a servo valve, and the servo valve is connected with a bending cylinder, and the method is characterized by comprising the following steps:
acquiring a first roll bending force set value of the current rolled strip steel, wherein the first roll bending force set value is an original roll bending force set value of the roll bending force control system;
acquiring a rolling force feedforward adjustment quantity of the current rolled strip steel in an Nth scanning period, wherein the rolling force feedforward adjustment quantity is used for performing feedforward adjustment on the rolling force of the current rolled strip steel in a rolling force control system, and the Nth scanning period refers to scanning an internal execution program for the Nth time in the rolling process of the current rolled strip steel;
obtaining a second roll bending force set value of the current rolled strip steel in the Nth scanning period based on the sum of the first roll bending force set value and the rolling force feedforward regulating quantity, wherein N is a positive integer;
and outputting a roll bending force control quantity to the servo valve based on the second roll bending force set value, so that the servo valve drives the roll bending cylinder to act according to the roll bending force control quantity, and the roll bending of the roll is realized.
2. The method of claim 1, wherein the roll force feed-forward adjustment of the current rolled strip in the nth scan cycle is obtained based on the following equation:
Fw_f﹦∑α*η*(Fi+1-Fi)；
wherein i is a positive integer, i is taken from 1 to N-2 in sequence, Fw_fIs that it isThe rolling force feedforward adjustment quantity of the current rolled strip steel in the Nth scanning period is obtained; fi+1A rolling force obtained in an i +1 th scanning period by scanning an internal execution program for the rolling force control system based on a specific frequency; fiThe rolling force control system scans the internal execution program based on the specific frequency and obtains the rolling force in the ith scanning period, α is an adjusting coefficient, η is a width coefficient related to the current rolled strip steel, and N is a positive integer greater than 2.
3. The leveler roll force control method of claim 2, wherein α is 0.3.
4. The method for controlling bending force of a temper mill according to claim 2, wherein when W is less than or equal to 800mm, η is 0.4, when 800mm is less than or equal to 1000mm, η is 0.35, when 900mm is less than or equal to 1000mm, η is 0.3, when 1000mm is less than or equal to 1200mm, η is 0.25, and when W is greater than 1200mm, η is 0.2, wherein W is the width rolled by the current coiled steel strip.
5. The method of claim 2, further comprising, after outputting a roll bending force control amount to the servo valve based on the second roll bending force setting value:
and when the current rolled strip steel is rolled, resetting the rolling force feedforward regulating quantity, and acquiring the rolling force feedforward regulating quantity of the next rolled strip steel.
6. The method for controlling the bending force of the temper mill according to claim 5, wherein when the current rolled strip steel is completely rolled, the method specifically comprises the following steps:
and when the welding line to the frame signal is monitored, determining that the rolling of the current rolled strip steel is finished.
7. A temper mill roll bending force control system, comprising:
the first acquisition module is used for acquiring a first bending force set value of the current rolled strip steel, wherein the first bending force set value is an original bending force set value of the bending force control system;
the second acquisition module is used for acquiring the rolling force feedforward adjustment quantity of the current rolled strip steel in an Nth scanning period, wherein the rolling force feedforward adjustment quantity is used for performing feedforward adjustment on the rolling force of the current rolled strip steel in a rolling force control system, and the Nth scanning period refers to scanning of an internal execution program for the Nth time in the rolling process of the current rolled strip steel;
the obtaining module is used for obtaining a second roll bending force set value of the current rolled strip steel in the Nth scanning period based on the sum of the first roll bending force set value and the rolling force feedforward regulating quantity, wherein N is a positive integer larger than 2;
and the output module is used for outputting the roll bending force control quantity to the servo valve based on the second roll bending force set value, so that the servo valve drives the roll bending cylinder to act according to the roll bending force control quantity, and the roll bending of the roll is realized.
8. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the program, is adapted to carry out the method steps of any of claims 1 to 6.
9. A computer storage medium on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the method steps of any of claims 1 to 6.
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