CN114433640B - Method and device for determining roll gap pre-control adjustment value - Google Patents

Method and device for determining roll gap pre-control adjustment value Download PDF

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Publication number
CN114433640B
CN114433640B CN202210118600.2A CN202210118600A CN114433640B CN 114433640 B CN114433640 B CN 114433640B CN 202210118600 A CN202210118600 A CN 202210118600A CN 114433640 B CN114433640 B CN 114433640B
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roll gap
sampling
value
control adjustment
rolling
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CN114433640A (en
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叶胜钱
杨海明
李涛
夏滨
张生海
李永思
张斌
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Beijing Twenty First Century Science & Technology Development Co ltd
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Beijing Twenty First Century Science & Technology Development Co ltd
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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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  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

The disclosure provides a method and a device for determining a roll gap pre-control adjustment value, and relates to the technical field of automatic control, wherein the method comprises the following steps: rolling the target material by taking the obtained pre-swing roll gap value as an initial roll gap value of a rolling mill; in the initial stage of rolling, sampling is carried out once every preset time, the actual rolling force born by a target material and the corresponding actual rolling thickness are obtained, the roll gap pre-control adjustment quantity corresponding to each sampling is calculated, the roll gap of the rolling mill is adjusted until the difference value between the actual rolling force obtained by the last sampling and the actual rolling force obtained by the previous sampling is smaller than or equal to a first threshold value, and/or the actual rolling thickness corresponding to the actual rolling force obtained by the last sampling is smaller than or equal to the target thickness of the target material, and the sampling is stopped; and determining the roll gap pre-control adjusting value corresponding to the last sampling as the roll gap pre-control adjusting value of the current pass. Thereby, the difference between the actual rolling thickness of the target material at the outlet of the rolling mill and the target thickness is reduced.

Description

Method and device for determining roll gap pre-control adjustment value
Technical Field
The disclosure relates to the technical field of automatic control, and in particular relates to a method and a device for determining a roll gap adjustment value.
Background
The metal strip rolling mill is generally provided with a thickness automatic control system using a hydraulic servo system as an actuating mechanism, wherein the thickness automatic control system calculates a roll gap given value of the rolling mill according to the thickness of the incoming material of the plate, the target thickness of the rolled plate, the rigidity coefficient of the rolling mill, the plasticity related calculation coefficient of the plate and the like. To make the actual thickness of the rolled material approach the target thickness of the rolled material, the roll gap set point of the rolling mill often needs to be adjusted.
At present, the quantity affecting the set value of the roll gap of the rolling mill comprises a monitoring AGC (automatic thickness control, automatic Gauge Control) regulating roll gap value delta H agc, a manual roll gap fine regulating value H man and a roll gap pre-regulating value H pre, in the actual regulating process, since the monitoring AGC regulating roll gap value needs an outlet thickness meter to measure the actual value of the outlet thickness of the rolling mill as a calculation basis, in the initial stage of rolling, the monitoring AGC regulating cannot timely participate in controlling the set value of the roll gap, and mainly the roll gap pre-regulating value H pre participates in regulating, but after the roll gap of the rolling mill is regulated based on the roll gap pre-regulating value determined by the existing method, the difference between the thickness of the material at the outlet of the rolling mill and the target thickness after rolling is larger.
Disclosure of Invention
In order to solve the technical problems, the disclosure provides a method and a device for determining a roll gap pre-control adjustment value, electronic equipment and a readable storage medium.
In a first aspect, the present disclosure provides a method for determining a roll gap precontrolled adjustment value, including:
Obtaining a pre-swing roll gap value of a rolling mill, taking the pre-swing roll gap value as an initial roll gap value of the rolling mill, and rolling a target material;
Sampling is carried out once at preset time intervals at the initial stage of rolling, and the actual rolling force born by the target material and the actual rolling thickness corresponding to the actual rolling force are obtained; and calculating a roll gap pre-control adjustment quantity corresponding to each sampling based on the actual rolling force obtained by each sampling, adjusting the roll gap of the rolling mill to obtain a new roll gap given value, and continuously rolling the target material based on the new roll gap given value so as to perform the next sampling.
If the difference value between the actual rolling force obtained by the last sampling and the actual rolling force obtained by the last sampling is smaller than or equal to a first threshold value, and/or the actual rolling thickness corresponding to the actual rolling force obtained by the last sampling is smaller than or equal to the target thickness of the target material, stopping sampling;
Acquiring a roll gap pre-control adjustment value corresponding to the last sampling, and determining the roll gap pre-control adjustment value corresponding to the last sampling as a roll gap pre-control adjustment value of the current pass; the roll gap pre-control adjustment value corresponding to the last sampling is calculated based on the roll gap pre-control adjustment value corresponding to each sampling before the last sampling.
As an optional implementation manner of the disclosed embodiment, the obtaining a pre-swing roll gap value of a rolling mill, taking the pre-swing roll gap value of the rolling mill as an initial roll gap value of the rolling mill, rolling a target material includes:
and obtaining the target thickness of the target material, taking the target thickness of the target material as a pre-swing roll gap value of the rolling mill, and rolling the target material.
As an optional implementation manner of the embodiment of the present disclosure, the obtaining a roll gap precontrolled adjustment value corresponding to the last sampling includes:
Acquiring roll gap pre-control adjustment amounts corresponding to each sampling before the last sampling;
and summing the roll gap pre-control adjustment values corresponding to the sampling to obtain the roll gap pre-control adjustment value corresponding to the last sampling.
As an optional implementation manner of the embodiment of the present disclosure, the obtaining roll gap precontrolled adjustment amounts corresponding to each sampling before the last sampling includes:
and calculating roll gap pre-control adjustment amounts corresponding to the sampling according to the following formula:
ΔHpre(i)＝β[(k1+k2)(Pi-Pi-1)]+(1-β)ΔHpre(i-1)；
Wherein, delta H pre(i) is a roller gap pre-control adjusting value corresponding to the ith sampling; ΔH pre(i-1) is the preset control adjustment value of the roller gap corresponding to the i-1 th sampling; beta is a pre-control adjusting intensity coefficient; k 1 is the yield strength calculation coefficient of the target material; k 2 is the rigidity coefficient of the rolling mill; p i is the actual rolling force obtained by the ith sampling; the actual rolling force obtained by sampling P i-1 th time i-1 th time; i is the number of samples.
As an alternative implementation of the embodiments of the present disclosure, the method further includes: and stopping sampling if the sampling times reach a second threshold value.
As an optional implementation manner of the embodiment of the present disclosure, after obtaining the roll gap pre-control adjustment value corresponding to the last sampling, and determining the roll gap pre-control adjustment value corresponding to the last sampling as the roll gap pre-control adjustment value of the current pass, the method further includes:
determining a target roll gap given value based on the roll gap pre-control adjustment value of the current pass;
And rolling the target material continuously based on the target roll gap set value until the pass rolling is completed.
In a second aspect, the present disclosure provides a device for determining a roll gap precontrolled adjustment value, including:
The device comprises an acquisition module, a rolling mill and a rolling mill control module, wherein the acquisition module is used for acquiring a pre-swing roll gap value of the rolling mill, taking the pre-swing roll gap value as an initial roll gap value of the rolling mill and rolling a target material;
The control module is used for sampling once every preset time at intervals in the initial stage of rolling to obtain the actual rolling force born by the target material and the actual rolling thickness corresponding to the actual rolling force; and calculating a roll gap pre-control adjustment quantity corresponding to each sampling based on the actual rolling force obtained by each sampling, adjusting the roll gap of the rolling mill to obtain a new roll gap given value, and continuously rolling the target material based on the new roll gap given value so as to perform the next sampling.
The judging module is used for determining that when the difference value between the actual rolling force obtained by the last sampling and the actual rolling force obtained by the last sampling is smaller than or equal to a first threshold value, and/or the actual rolling thickness corresponding to the actual rolling force obtained by the last sampling is smaller than or equal to the target thickness of the target material, stopping sampling;
The determining module is used for obtaining the roll gap pre-control adjusting value corresponding to the last sampling and determining the roll gap pre-control adjusting value corresponding to the last sampling as the roll gap pre-control adjusting value of the current pass; the roll gap pre-control adjustment value corresponding to the last sampling is calculated based on the roll gap pre-control adjustment value corresponding to each sampling before the last sampling.
As an optional implementation manner of the disclosed embodiment, the obtaining module is specifically configured to obtain a target thickness of the target material, and roll the target material with the target thickness of the target material as a pre-swing roll gap value of the rolling mill.
As an optional implementation manner of the embodiments of the present disclosure, the determining module is specifically configured to obtain roll gap precontrolled adjustment amounts corresponding to each sampling before the last sampling;
And summing the roll gap pre-control adjustment values corresponding to the samples to obtain the roll gap pre-control adjustment value corresponding to the last sampling.
As an optional implementation manner of the embodiment of the disclosure, the determining module is specifically configured to: and calculating roll gap pre-control adjustment amounts corresponding to the sampling according to the following formula:
ΔHpre(i)＝β[(k1+k2)(Pi-Pi-1)]+(1-β)ΔHpre(i-1)；
Wherein, delta H pre(i) is a roller gap pre-control adjusting value corresponding to the ith sampling; ΔH pre(i-1) is the preset control adjustment value of the roller gap corresponding to the i-1 th sampling; beta is a pre-control adjusting intensity coefficient; k 1 is the yield strength calculation coefficient of the target material; k 2 is the rigidity coefficient of the rolling mill; p i is the actual rolling force obtained by the ith sampling; the actual rolling force obtained by sampling P i-1 th time i-1 th time; i is the number of samples.
As an optional implementation manner of the embodiment of the disclosure, the control module is further configured to stop sampling when it is determined that the sampling number reaches the second threshold.
As an optional implementation manner of the embodiment of the disclosure, the control module is further configured to determine a target roll gap given value based on the roll gap preset adjustment value of the current pass; and rolling the target material continuously based on the target roll gap set value until the pass rolling is completed.
In a third aspect, the present disclosure provides an electronic device comprising: a memory and a processor;
The memory is configured to store computer program instructions;
The processor is configured to execute the computer program instructions to cause the electronic device to implement the method of determining a roll gap pre-control adjustment value according to any one of the first aspects.
In a fourth aspect, the present disclosure provides a computer readable storage medium having stored thereon a computer program, which when executed by a processor implements a method for determining a roll gap pre-control adjustment value according to any one of the alternative embodiments of the first aspect.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
according to the embodiment of the disclosure, a target material is rolled by obtaining a pre-swing roll gap value of a rolling mill, wherein the pre-swing roll gap value is used as an initial roll gap value of the rolling mill, sampling is carried out once at preset time intervals in the initial stage of rolling, and the actual rolling force born by the target material and the actual rolling thickness corresponding to the actual rolling force are obtained; and calculating a roll gap pre-control adjustment quantity corresponding to each sampling based on the actual rolling force obtained by each sampling, adjusting the roll gap of the rolling mill to obtain a new roll gap given value, and continuously rolling the target material based on the new roll gap given value so as to perform the next sampling. According to the embodiment of the disclosure, the roll gap of the rolling mill is adjusted for multiple times by the roll gap pre-control adjustment amount obtained through each sampling, and sampling is stopped when the difference value between the actual rolling force obtained through the last sampling and the actual rolling force obtained through the previous sampling is smaller than or equal to a first threshold value, and/or the rolling thickness corresponding to the actual rolling force obtained through the last sampling is smaller than or equal to the target thickness of the target material, so that the thickness difference between the actual thickness and the target thickness of the target material at the outlet of the rolling mill is reduced, and the thickness of the material at the outlet of the rolling mill is approximate to the target thickness of the material. On the other hand, the roll gap is adjusted by the roll gap pre-control adjustment quantity obtained through each sampling, and the workload of manually adjusting the roll gap of the rolling mill before the AGC is monitored is reduced. In addition, the roll gap pre-control adjusting value corresponding to the last sampling is obtained, the roll gap pre-control adjusting value corresponding to the last sampling is determined to be the roll gap pre-control adjusting value of the current pass, and the time for adjusting the roll gap to the actual thickness of the rolled material to approach the target thickness after the AGC is monitored can be reduced because the actual thickness of the target material at the outlet of the rolling mill approaches the target thickness.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a flow chart of steps of a method for determining a roll gap pre-control adjustment value according to one embodiment of the present disclosure;
FIG. 2 is a flow chart illustrating steps of a method for determining a roll gap pre-control adjustment value according to another embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a device for determining a roll gap pre-control adjustment value according to an embodiment of the present disclosure;
fig. 4 is an internal structural diagram of an electronic device provided in one embodiment of the present disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.
In the presently disclosed embodiments, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in the examples of this disclosure should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
First, an application scenario of the present disclosure solution is described: the scheme can be applied to a cold rolling roughing mill and a hot rolling mill. When rolling a sheet material, in order to make the actual thickness of the rolled material reach or approach the target thickness quickly, the set roll gap set value of the rolling mill needs to be adjusted, and the roll gap set value of the rolling mill can be calculated by the following formula (1):
Href＝Htarget-Hpre+Hman+ΔHagc； (1)
Wherein H ref is a roll gap given value mm of the rolling mill; h targer is the thickness mm of the rolling target; h man is manual roll gap fine adjustment value mm; h pre is a roll gap pre-control adjusting value mm; ΔH agc is the monitor AGC adjustment roll gap value mm.
As the actual thickness of the target material at the outlet of the rolling mill is required to be measured by the outlet thickness gauge as a calculation basis for monitoring the AGC regulating roll gap value, the control cannot be timely participated in at the initial stage of rolling. At the beginning of rolling, the only factors that can rapidly influence the actual thickness of the target material at the outlet of the mill are the manual roll gap trim value H man and the roll gap pre-control trim value H pre. The manual roll gap fine adjustment value H man is related to the proficiency and operation experience of the rolling mill operator, and the manual adjustment stability is low. Thus, in the initial stage of rolling, the rolling mill roll gap pre-control adjustment value H pre is a key for determining the actual thickness of the target material at the outlet of the rolling mill, and the unsuitable rolling mill roll gap pre-control adjustment value H pre affects the deviation value between the actual thickness and the target thickness of the target material at the outlet of the rolling mill. In this case, the actual thickness of the target material can only be controlled to approach the target thickness by inputting the monitoring AGC adjustment, but this can make the actual rolling thickness of the target material reach the rolling target thickness, which is too long, and can cause a long section of rolling stub bar with unqualified thickness, resulting in waste of material. Therefore, there is a need for a method for improving the accuracy of the roll gap pre-control adjustment value H pre so that the actual thickness of the target material to be rolled can be made to approach the target thickness at the initial stage of rolling.
The method for determining the roll gap pre-control adjustment value provided by the embodiment of the disclosure may be performed by an electronic device provided by the embodiment of the disclosure, and the embodiment of the disclosure is not limited to a specific type of the electronic device, for example, the electronic device in the embodiment of the disclosure may be, but is not limited to, a computer program product, such as an industrial control computer, a commercial computer, a server, a singlechip, a programmable controller (Programmable Logic Controller, a PLC), a distributed control system (Distributed Control System, DCS), and the like.
Based on the foregoing description, a method for determining a roll gap pre-control adjustment value provided by the present disclosure is described in detail with reference to the drawings and application scenarios of the embodiments of the present disclosure.
Fig. 1 is a method for determining a roll gap pre-control adjustment value according to an embodiment of the present disclosure, which may include the following steps:
S110, obtaining a pre-swing roll gap value of the rolling mill, taking the pre-swing roll gap value as an initial roll gap value of the rolling mill, and rolling a target material.
Alternatively, the target material may be rolled by obtaining the target thickness of the target material, and taking the target thickness of the target material as the pre-swing roll gap value of the rolling mill, that is, setting the target thickness of the target material as the initial roll gap value of the rolling mill.
The target material includes a plate material to be rolled, and the target thickness of the target material is a rolling target thickness of the target material, for example, if the target material having the original thickness of the first thickness is rolled into a plate having the thickness of the second thickness, the target thickness of the target material is the second thickness. The pre-swing roll gap value of the rolling mill is an initial roll gap value when rolling the target material. The electronic equipment obtains the target thickness of the target material, and takes the target thickness of the target material as a pre-swing roll gap value of the rolling mill.
Specifically, in the pressure ring mode, the pressing rolling force is set to be the actual rolling force (unit is ton) through the thickness control system, the pressing rolling force is used as a rolling force reference standard for calculating the pre-control roll gap adjustment quantity corresponding to the first sampling, namely Δh pre(0) =0, and the roll gap pre-control adjustment quantity corresponding to the first sampling is calculated. And performing roll gap zero clearing operation, and taking the feedback value of the roll gap position sensor as a reference value or a reference value for calculating an actual roll gap value (roll gap given value). The electronic equipment obtains the pressing rolling force of the rolling mill and the target thickness of the target material, and sets the pre-swing roll gap value of the rolling mill as the target thickness of the target material.
When the pre-swing roll gap value of the rolling mill is the target thickness of the target material, the corresponding roll gap pre-control adjustment value H pre =0 at the beginning of rolling, the manual roll gap fine adjustment value H man =0, and the AGC adjustment roll gap value delta H agc＝0,Href＝Htarget is monitored, namely, the roll gap given value at the beginning of rolling is equal to the target thickness of the target material.
The value of the pressing rolling force is related to the material of the target material, and the value of the pressing rolling force is different from the material, for example, the set value of the pressing rolling force may be any value in the interval [150, 200] for aluminum or aluminum alloy material, for example, 160 ton, 180 ton, etc.
In general, the rolled material can rebound, so that the actual thickness of the rolled material is larger than the actual roll gap value of the rolling mill, and the target thickness of the target material is taken as the initial roll gap value of the rolling mill, so that the actual rolling thickness of the target material is prevented from being smaller than the target thickness before the roll gap is regulated, and the difference between the actual rolling thickness and the target thickness can be effectively reduced.
S120, sampling is carried out once every preset time in the initial stage of rolling, and the actual rolling force born by the target material and the actual rolling thickness corresponding to the actual rolling force are obtained; and calculating a roll gap pre-control adjustment quantity corresponding to each sampling based on the actual rolling force obtained by each sampling, adjusting the roll gap of the rolling mill to obtain a new roll gap given value, and continuously rolling the target material based on the new roll gap given value so as to perform the next sampling.
Wherein the initial rolling period refers to the period of time from the bite to the closed loop AGC input by the rolling mill. The user may set the preset time, for example, to 10 seconds, which is the application duration of the new roll gap set point obtained for each sample before the last sample. The actual rolling force is the rolling force detected by the sensor, and the actual thickness of the target material after being rolled under the action of the actual rolling force is the actual rolling thickness corresponding to the actual rolling force. The electronic equipment can obtain the actual rolling force born by the target material through reading the actual rolling force fed back by the sensor, and obtain the actual rolling thickness corresponding to the actual rolling force born by the target material through reading the thickness value fed back by the thickness gauge.
Calculating a roll gap pre-control adjustment quantity corresponding to each sampling based on the actual rolling force obtained by each sampling in the step, adjusting the roll gap of the rolling mill, and obtaining a new roll gap given value to explain: and calculating the roll gap pre-control adjustment quantity corresponding to each sampling based on the actual rolling force obtained by each sampling, and adjusting the roll gap of the rolling mill based on the roll gap pre-control adjustment quantity corresponding to each sampling. Exemplary, the roll gap of the rolling mill is adjusted based on the roll gap pre-control adjustment amount corresponding to the first sampling to obtain a new roll gap set value, the target material is rolled continuously based on the new roll gap set value, after a preset time, the second sampling is performed to obtain the roll gap pre-control adjustment amount corresponding to the second sampling, the roll gap of the rolling mill is adjusted to obtain a new roll gap set value, the target material is rolled continuously based on the new roll gap set value, and after the preset time, the third sampling … … is performed
And S130, stopping sampling if the difference value between the actual rolling force obtained by the last sampling and the actual rolling force obtained by the previous sampling is smaller than or equal to a first threshold value, and/or the actual rolling thickness corresponding to the actual rolling force obtained by the last sampling is smaller than or equal to the target thickness of the target material.
Wherein the previous sample in step S130 is the sample before the last sample and having the shortest time interval from the last sample, and the last sample is the sample closest to the current time
Step S120 and step S130 are explained by the following cases:
In the first case, the roll gap pre-control adjustment quantity corresponding to the ith-1 sampling is calculated based on the actual rolling force obtained by the ith-1 sampling, the roll gap of the rolling mill is adjusted to obtain a new roll gap given value, rolling is continuously carried out on a target material based on the new roll gap given value, after the preset time, the ith sampling is carried out to obtain the actual rolling force, if the difference value between the actual rolling force obtained by the ith sampling and the actual rolling force obtained by the ith-1 sampling is smaller than or equal to a first threshold value, sampling is not carried out any more, and the roll gap pre-control adjustment value corresponding to the ith sampling is obtained.
In the second case, the roll gap pre-control adjustment quantity corresponding to the ith-1 sampling is calculated based on the actual rolling force obtained by the ith-1 sampling, the roll gap of the rolling mill is adjusted to obtain a new roll gap set value, the target material is rolled continuously based on the new roll gap set value, after the preset time, the ith sampling is carried out to obtain the actual rolling force and the corresponding actual rolling thickness, and if the actual rolling thickness corresponding to the actual rolling force obtained by the ith sampling is smaller than or equal to the target thickness of the target material, sampling is not carried out any more, and the roll gap pre-control adjustment value corresponding to the ith sampling is obtained.
In the third case, the roll gap pre-control adjustment quantity corresponding to the ith-1 sampling is calculated based on the actual rolling force obtained by the ith-1 sampling, the roll gap of the rolling mill is adjusted to obtain a new roll gap set value, the target material is rolled continuously based on the new roll gap set value, after the preset time, the ith sampling is carried out to obtain the actual rolling force and the corresponding actual rolling thickness, if the difference value between the actual rolling force obtained by the ith sampling and the actual rolling force obtained by the previous sampling is smaller than or equal to a first threshold value, and the actual rolling thickness corresponding to the actual rolling force obtained by the sampling is smaller than or equal to the target thickness of the target material, the sampling is not carried out any more, and the roll gap pre-control adjustment value corresponding to the ith sampling is obtained.
Alternatively, the number of samplings may also be used as another judgment condition for determining whether to stop the sampling. Specifically, when the difference value between the actual rolling force obtained by the last sampling and the actual rolling force obtained by the previous sampling is smaller than or equal to a first threshold value, and the actual rolling thickness corresponding to the actual rolling force obtained by the last sampling is larger than the target thickness of the target material, if the sampling frequency reaches a second threshold value, stopping sampling. Preferably, the second threshold value may be any integer greater than or equal to 5 and less than or equal to 8.
And S140, acquiring a roll gap pre-control adjusting value corresponding to the last sampling, and determining the roll gap pre-control adjusting value corresponding to the last sampling as a roll gap pre-control adjusting value of the current pass.
The roll gap pre-control adjustment value corresponding to the last sampling is calculated based on the roll gap pre-control adjustment value corresponding to each sampling before the last sampling.
In this embodiment, when the manual roll gap fine adjustment value is zero, the roll gap pre-control adjustment value corresponding to the last sampling is equal to the difference between the pre-swing roll gap value of the rolling mill and the actual roll gap value at the last sampling.
Optionally, after determining the roll gap pre-control adjustment value corresponding to the last sampling as the roll gap pre-control adjustment value of the current pass, determining a target roll gap given value based on the roll gap pre-control adjustment value of the current pass, and continuing to roll the target material based on the target roll gap given value until the rolling of the current pass is completed.
It should be noted that, in this embodiment, after determining the roll gap pre-control adjustment value of the current pass, if the AGC adjustment roll gap value Δh agc and the manual roll gap fine adjustment value H man are monitored to be zero, the target roll gap given value is equal to the actual roll gap value at the last sampling, that is, is equal to the difference between the pre-swing roll gap value (target thickness of the target material) of the rolling mill and the roll gap pre-control adjustment value of the current pass. If the AGC adjustment roll gap value delta H agc and the manual roll gap fine adjustment value H man are not zero, the difference between the pre-swing roll gap value (the target thickness of the target material) of the rolling mill and the roll gap pre-control adjustment value of the current pass is monitored, and then the AGC adjustment roll gap value and the manual roll gap fine adjustment value H man are added, so that the target roll gap set value is obtained.
According to the embodiment of the disclosure, the rolling force of the rolling mill and the pre-swing roll gap value are obtained, and the pre-swing roll gap value is used as an initial roll gap value of the rolling mill to roll a target material; sampling is carried out once at preset time intervals at the initial stage of rolling, and the actual rolling force born by the target material and the actual rolling thickness corresponding to the actual rolling force are obtained; and calculating a roll gap pre-control adjustment quantity corresponding to each sampling based on the actual rolling force obtained by each sampling, adjusting the roll gap of the rolling mill to obtain a new roll gap given value, and continuously rolling the target material based on the new roll gap given value so as to perform the next sampling. According to the embodiment of the disclosure, the roll gap of the rolling mill is adjusted for multiple times by the roll gap pre-control adjustment amount obtained through each sampling, and sampling is stopped when the difference value between the actual rolling force obtained through the last sampling and the actual rolling force obtained through the previous sampling is smaller than or equal to a first threshold value, and/or the rolling thickness corresponding to the actual rolling force obtained through the last sampling is smaller than or equal to the target thickness of the target material, so that the thickness difference between the actual thickness and the target thickness of the target material at the outlet of the rolling mill is reduced, and the thickness of the material at the outlet of the rolling mill is approximate to the target thickness of the material. On the other hand, the roll gap is adjusted by the roll gap pre-control adjustment quantity obtained through each sampling, and the workload of manually adjusting the roll gap of the rolling mill before the AGC is monitored is reduced. In addition, the roll gap pre-control adjusting value corresponding to the last sampling is obtained, the roll gap pre-control adjusting value corresponding to the last sampling is determined to be the roll gap pre-control adjusting value of the current pass, and the time for adjusting the roll gap to the actual thickness of the material to approach the target thickness after the AGC is monitored can be reduced because the actual thickness of the target material at the outlet of the rolling mill approaches the target thickness.
Fig. 2 is a block diagram of a roll gap pre-control adjustment method according to another embodiment of the present disclosure, in which step S210 is the same as or similar to step S110 in the previous embodiment, and reference may be made to the explanation and description of step S110 in the previous embodiment, and for brevity, a detailed description thereof will not be provided here. Steps S220 to S260 in this embodiment are descriptions of specific implementation of steps S120 to S130 in the previous embodiment, and this implementation includes the following steps:
s210, obtaining a pre-swing roll gap value of a rolling mill, and rolling a target material by taking the pre-swing roll gap value as an initial roll gap value of the rolling mill.
S220, after a preset time (for example, 15 seconds) of threading and biting of the rolling mill is performed in the initial stage of rolling, sampling is performed for the first time, the actual rolling force born by the target material in the first sampling and the actual rolling thickness corresponding to the actual rolling force are obtained, and the first roll gap pre-control adjustment quantity is calculated.
S230, calculating a corresponding roll gap pre-control adjustment value based on the first roll gap pre-control adjustment amount.
The roll gap pre-control adjusting value obtained based on the first roll gap pre-control adjusting value is a roll gap pre-control adjusting value corresponding to the second sampling.
S240, adjusting the roll gap of the rolling mill based on the calculated roll gap pre-control adjusting value to obtain a new roll gap given value.
S250, continuing to roll the target material by applying a new roll gap given value, sampling for the second time after a preset time (for example, 10 seconds), obtaining the actual rolling force born by the target material during the second sampling and the actual rolling thickness corresponding to the actual rolling force, and calculating a second roll gap pre-control adjustment quantity.
S260, judging whether the actual rolling force born by the target material in the second sampling and the actual rolling force born by the target material in the first sampling are smaller than a first threshold value, and whether the actual rolling thickness acquired in the second sampling is larger than the target thickness.
The actual rolling thickness obtained in the second sampling is the actual rolling thickness corresponding to the actual rolling force born by the target material in the second sampling.
If yes, return to execute steps S230-S260: calculating a corresponding roll gap pre-control adjustment value based on the second roll gap pre-control adjustment amount; adjusting the roll gap of the rolling mill based on the roll gap pre-control adjusting value to obtain a new roll gap given value; and (3) continuing to roll the target material by applying a new roll gap set value, after a preset time, performing third sampling, obtaining the actual rolling force born by the target material during the third sampling and the actual rolling thickness corresponding to the actual rolling force, calculating a third roll gap pre-control adjustment quantity, judging whether the actual rolling force born by the target material during the third sampling and the actual rolling force born by the target material during the second sampling are smaller than a first threshold value, and judging whether the actual rolling thickness obtained during the second sampling is larger than the target thickness … …, namely, under the condition that the actual rolling force born by the target material during the i-th sampling and the actual rolling force born by the target material during the i-1-th sampling are not smaller than a first threshold value and the actual rolling thickness obtained during the i-th sampling is not larger than the target thickness, wherein steps S240-S260 are repeatedly executed for a plurality of times.
If not, executing the following steps: and acquiring a roll gap pre-control adjusting value corresponding to the last sampling, and determining the roll gap pre-control adjusting value corresponding to the last sampling as a roll gap pre-control adjusting value of the current pass.
It should be noted that, in the first return to the execution of steps S230 to S260 in this embodiment, the "first" in steps S230 and S260 should be the "second", for example, the "first roll gap pre-control adjustment amount" should be the "second roll gap pre-control adjustment amount", the "first sampling" should be the "second sampling", and the "second" in step S250 should be the "third", for example, the "second sampling" should be the "third sampling", the "second roll gap pre-control adjustment amount" should be the "third roll gap pre-control adjustment amount"; when the steps S230 to S260 are executed again, the "first" in the steps S230 and S260 should be "third", for example, the "first roll gap pre-control adjustment amount" should be "third roll gap pre-control adjustment amount", "first sampling" should be "third sampling", the "second" in the step S250 should be "fourth", for example, the "second sampling" should be "fourth sampling", "second roll gap pre-control adjustment amount" should be "fourth roll gap pre-control adjustment amount" … …, and the like, and it is clear that the specific processes, "first" and "second", and "third", etc. when the steps S230 to S260 are executed again, are only used to distinguish different objects, and do not constitute any limitation.
For example, the concrete implementation procedure in the no case may be performed by the following step S270:
S270, acquiring a roll gap pre-control adjustment value corresponding to the second sampling, and determining the roll gap pre-control adjustment value corresponding to the second sampling as a roll gap pre-control adjustment value of the current pass.
In combination with the above description, the second sampling in step S270 is the last sampling.
Alternatively, in the foregoing two embodiments, the obtaining the roll gap pre-control adjustment value corresponding to the last sample may be implemented by the following steps:
step one, calculating roll gap pre-control adjustment quantity corresponding to each sampling according to the following formula (2).
ΔHpre(i)＝β[(k1+k2)(Pi-Pi-1)]+(1-β)ΔHpre(i-1) (2)；
Wherein, delta H pre(i) is the roll gap pre-control adjustment quantity corresponding to the ith sampling; ΔH pre(i-1) is the roll gap pre-control adjustment amount corresponding to the i-1 th sampling; beta is a pre-control adjusting intensity coefficient; k 1 is the yield strength calculation coefficient of the target material; k 2 is the rigidity coefficient of the rolling mill; p i is the actual rolling force obtained by the ith sampling; the actual rolling force obtained by sampling the ith-1 time of P i-1, i is the sampling times.
I may be an integer greater than 1 and less than or equal to 8; k 1 is related to the properties of the material being rolled, for example, when the target material is aluminum or aluminum alloy, the preferred value of k 1 is in the interval [0.00015,0.0015]; beta is a pre-control adjusting intensity coefficient, the value range is [0,1], and the preferred value range is [0.6,1].
It should be noted that, the first roll gap pre-control adjustment amount obtained in step S230 and the second roll gap pre-control adjustment amount obtained in step S260 may be calculated by the above formula (2).
Specifically, the rolling mill is threaded and bites the material and presets the length of time, and the corresponding roll gap precontrolled adjustment quantity delta H pre(1)＝β[(k1+k2)(P1-P0 is sampled for the first time; wherein P 0 is equal to the pressing rolling force; calculating a new roll gap given value based on delta H pre(1), adjusting the roll gap of the rolling mill, continuously rolling the target material, sampling for the second time after the preset time, obtaining the actual rolling force P 2 at the second sampling moment, and calculating the corresponding roll gap pre-control adjustment quantity: Δh pre(2)＝β[(k1+k2)(P2-P1)]+(1-β)ΔHpre(1).
And step two, summing the roll gap pre-control adjustment values corresponding to the samples before the last sampling to obtain the roll gap pre-control adjustment value corresponding to the last sampling.
By way of example, the roll gap pre-control adjustment value corresponding to the third sample may be obtained by adding the roll gap pre-control adjustment value corresponding to the first sample to the roll gap pre-control adjustment value corresponding to the second sample.
That is, the roll gap pre-control adjustment value H pre corresponding to the ith sample can be obtained by the following formula (3):
wherein n is equal to the number of samples before the last sampling, and when the last sampling is the third sampling, for example, n=2, the calculation mode of the roll gap pre-control adjustment value corresponding to the last sampling is:
Hpre＝ΔHpre(1)+ΔHpre(2)
when the last sampling is the fourth sampling, n=3, and the calculation mode of the roll gap pre-control adjustment value corresponding to the last sampling is as follows:
Hpre＝ΔHpre(1)+ΔHpre(2)+ΔHpre(3)。
Optionally, if the number of sampling times reaches the second threshold, the sampling is stopped even if the difference between the actual rolling force obtained in the last sampling and the actual rolling force obtained in the previous sampling is greater than the first threshold and the rolling thickness corresponding to the actual rolling force obtained in the last sampling is greater than the target thickness of the target material.
The second threshold may be set according to a specific application scenario, and preferably, the value interval of the second threshold is [5,8], that is, the maximum value of the sampling times is 8. For example, if the last sample is the 8 th sample, the sampling is stopped even if the difference between the actual rolling force obtained by the 8 th sample and the actual rolling force obtained by the 7 th sample is greater than the first threshold value, and the rolling thickness corresponding to the actual rolling force obtained by the 8 th sample is greater than the target thickness of the target material.
For example, when β is 0.6, the original thickness (inlet thickness) of the target material is 6mm, the target thickness of the target material is 4.5mm, k 1 is 0.00015, k 2 is 0.0006, the rolling force against the rolling mill is 200 tons, the pre-swing roll gap of the rolling mill is 4.5mm, i is 1,2, 3,4, 5, the following table 1 is calculated when the roll gap pre-control adjustment value is determined by using the scheme in the above embodiment of the disclosure:
TABLE 1
In table 1, the rolling force deviation is the difference between the actual rolling force obtained by the ith sample and the actual rolling force obtained by the ith-1 sample, after the roll gap of the rolling mill is adjusted based on the roll gap pre-control adjustment value obtained by the ith-1 sample, the corresponding roll gap given value is the roll gap value of the rolling mill at the ith sample, that is, the roll gap pre-control adjustment value obtained by each sample except the last sample is used for adjusting the roll gap of the rolling mill, and the adjusted roll gap given value is always applied to continue rolling the target material for the next sample.
In this example, if the difference between the actual rolling force obtained in the 5 th sample and the actual rolling force obtained in the previous sample (4 th sample) is equal to or smaller than the first threshold value, and/or the actual rolling thickness corresponding to the actual rolling force obtained in the 5 th sample is equal to or smaller than the target thickness (4.5 mm) of the target material, the sampling is stopped. The roll gap pre-control adjustment value (0.23724 mm) obtained by the 4 th sampling calculation is determined as the roll gap pre-control adjustment value of the current pass, and under the condition that the AGC adjustment roll gap value delta H agc and the manual roll gap fine adjustment value H man are both zero, the roll gap given value (4.26276 mm) obtained by the 4 th sampling is the target roll gap given value of the current pass.
In the scheme provided by the embodiment of the disclosure, the roll gap of the rolling mill is always adjusted based on the roll gap pre-control adjustment value obtained in the last time, so that the rolling force of the rolling mill can be slowly increased, and the impact of the rolling load on the rolling mill is reduced. The repeated adjustment is repeated for a plurality of times, so that the speed that the actual thickness of the target material at the outlet of the rolling mill approaches to the target thickness is increased, and the time for adjusting the set value of the roll gap after the AGC is monitored is shortened, so that the thickness of the target material at the outlet of the rolling mill reaches to the target thickness. In addition, the roll gap pre-control adjustment value is calculated through the formula (2) and the formula (3), so that complex calculation of the roll gap pre-control adjustment value according to a rolling mill model is avoided.
Based on the same inventive concept, as an implementation of the method, the embodiment of the present invention further provides a device for determining a roll gap pre-control adjustment value, which performs the method for determining a roll gap pre-control adjustment value provided in the foregoing embodiment, where the device may perform the method for determining a roll gap pre-control adjustment value in the foregoing method embodiment, and for convenience of reading, the embodiment of the present invention does not describe details in the foregoing method embodiment one by one, but should be clear, where the device for determining a roll gap pre-control adjustment value in the present embodiment can correspondingly implement all the details in the foregoing method embodiment.
Fig. 3 is a schematic structural diagram of a device for determining a roll gap pre-control adjustment value according to an embodiment of the present disclosure, as shown in fig. 3, a device 300 for determining a roll gap pre-control adjustment value according to the embodiment includes:
And the obtaining module 310 is configured to obtain a pre-swing roll gap value of a rolling mill, and roll the target material by using the pre-swing roll gap value as an initial roll gap value of the rolling mill.
The control module 320 is configured to perform sampling once every preset time interval at an initial stage of rolling, and obtain an actual rolling force born by the target material and an actual rolling thickness corresponding to the actual rolling force; and calculating a roll gap pre-control adjustment quantity corresponding to each sampling based on the actual rolling force obtained by each sampling, adjusting the roll gap of the rolling mill to obtain a new roll gap given value, and continuously rolling the target material based on the new roll gap given value so as to perform the next sampling.
A judging module 330, configured to determine that sampling is stopped when a difference between an actual rolling force obtained by a last sampling and an actual rolling force obtained by a previous sampling is less than or equal to a first threshold, and/or an actual rolling thickness corresponding to the actual rolling force obtained by the last sampling is less than or equal to a target thickness of the target material;
A determining module 340, configured to obtain a roll gap pre-control adjustment value corresponding to the last sampling, and determine the roll gap pre-control adjustment value corresponding to the last sampling as a roll gap pre-control adjustment value of a current pass; the roll gap pre-control adjustment value corresponding to the last sampling is calculated based on the roll gap pre-control adjustment value corresponding to each sampling before the last sampling.
As an optional implementation manner of the embodiment of the present disclosure, the obtaining module 310 is specifically configured to obtain the target thickness of the target material, and roll the target material with the target thickness of the target material as a pre-swing roll gap value of the rolling mill.
As an optional implementation manner of the embodiment of the present disclosure, the determining module 340 is specifically configured to obtain roll gap pre-control adjustment amounts corresponding to each sampling before the last sampling; and summing the roll gap pre-control adjustment values corresponding to the sampling to obtain the roll gap pre-control adjustment value corresponding to the last sampling.
As an optional implementation manner of the embodiment of the present disclosure, the determining module 340 is specifically configured to: and calculating roll gap pre-control adjustment amounts corresponding to the sampling according to the following formula:
ΔHpre(i)＝β[(k1+k2)(Pi-Pi-1)]+(1-β)ΔHpre(i-1)；
Wherein, delta H pre(i) is a roller gap pre-control adjusting value corresponding to the ith sampling; ΔH pre(i-1) is the preset control adjustment value of the roller gap corresponding to the i-1 th sampling; beta is a pre-control adjusting intensity coefficient; k 1 is the yield strength calculation coefficient of the target material; k 2 is the rigidity coefficient of the rolling mill; p i is the actual rolling force obtained by the ith sampling; the actual rolling force obtained by sampling P i-1 th time i-1 th time; i is the number of samples.
As an optional implementation manner of the embodiment of the disclosure, the control module 320 is further configured to stop sampling when it is determined that the sampling number reaches the second threshold.
As an optional implementation manner of the embodiment of the present disclosure, the control module 320 is further configured to determine a target roll gap given value based on the roll gap preset adjustment value of the current pass; and rolling the target material continuously based on the target roll gap set value until the pass rolling is completed.
The device for determining the roll gap pre-control adjustment value provided in this embodiment may execute the method for determining the roll gap pre-control adjustment value provided in the foregoing method embodiment, and its implementation principle is similar to that of the technical effect, and will not be described herein again. All or part of each module in the roller gap pre-control adjustment value determining device can be realized by software, hardware and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, an electronic device is provided, including a memory storing a computer program and a processor implementing the steps of the method for determining a roll gap pre-control adjustment value according to any one of the above method embodiments when the computer program is executed.
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the disclosure. As shown in fig. 4, the electronic device provided in this embodiment includes: a memory 41 and a processor 42, the memory 41 for storing a computer program; the processor 42 is configured to execute steps in the method for determining the roll gap pre-control adjustment value provided in the above method embodiment when invoking the computer program, and its implementation principle and technical effects are similar, and will not be described herein. Those skilled in the art will appreciate that the structure shown in fig. 4 is merely a block diagram of a portion of the structure associated with the disclosed aspects and is not limiting of the electronic device to which the disclosed aspects apply, and that a particular electronic device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, which when executed by a processor implements the steps of the method for determining a roll gap pre-control adjustment value according to any one of the above method embodiments.
In the above-described embodiments, all or part of the functions may be implemented by software, hardware, or a combination of software and hardware. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present disclosure are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium. Computer readable storage media can be any available media that can be accessed by a computer or data storage devices, such as servers, data centers, etc., that contain an integration of one or more available media. Usable media may be magnetic media (e.g., floppy disks, hard disks, magnetic tape), optical media (e.g., DVD), or semiconductor media (e.g., solid State Disk (SSD)) or the like.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. The method for determining the roll gap pre-control adjustment value is characterized by comprising the following steps of:
Obtaining a target thickness of a target material, taking the target thickness of the target material as a pre-swing roll gap value of a rolling mill, and rolling the target material;
Sampling is carried out once at preset time intervals at the initial stage of rolling, and the actual rolling force born by the target material and the actual rolling thickness corresponding to the actual rolling force are obtained; calculating a roll gap pre-control adjustment quantity corresponding to each sampling based on the actual rolling force obtained by each sampling, adjusting the roll gap of the rolling mill to obtain a new roll gap given value, and continuously rolling the target material based on the new roll gap given value so as to perform the next sampling;
If the difference value between the actual rolling force obtained by the last sampling and the actual rolling force obtained by the last sampling is smaller than or equal to a first threshold value, and/or the actual rolling thickness corresponding to the actual rolling force obtained by the last sampling is smaller than or equal to the target thickness of the target material, stopping sampling;
Acquiring roll gap pre-control adjustment amounts corresponding to each sampling before the last sampling;
The roller gap pre-control adjustment amount corresponding to each sampling before the last sampling is obtained comprises the following steps:
and calculating roll gap pre-control adjustment amounts corresponding to the sampling according to the following formula:
ΔHpre(i)＝β[(k1+k2)(Pi-Pi-1)]+(1-β)ΔHpre(i-1)；
Wherein, delta H pre(i) is the roll gap pre-control adjustment quantity corresponding to the ith sampling; ΔH pre(i-1) is the roll gap pre-control adjustment amount corresponding to the i-1 th sampling; beta is a pre-control adjusting intensity coefficient; k 1 is the yield strength calculation coefficient of the target material; k 2 is the rigidity coefficient of the rolling mill; p i is the actual rolling force obtained by the ith sampling; the actual rolling force obtained by sampling P i-1 th time i-1 th time; i is the sampling times;
Summing the roll gap pre-control adjustment values corresponding to the sampling for each time to obtain a roll gap pre-control adjustment value corresponding to the last sampling;
and determining the roll gap pre-control adjusting value corresponding to the last sampling as the roll gap pre-control adjusting value of the current pass.
2. The method according to claim 1, wherein the method further comprises:
And stopping sampling if the sampling times reach a second threshold value.
3. The method of claim 1, wherein after determining the roll gap pre-control adjustment value corresponding to the last sampling as the roll gap pre-control adjustment value for the current pass, the method further comprises:
determining a target roll gap given value based on the roll gap pre-control adjustment value of the current pass;
And rolling the target material continuously based on the target roll gap set value until the pass rolling is completed.
4. The utility model provides a roll gap precontrolled adjusting value's determining device which characterized in that includes:
The obtaining module is used for obtaining the target thickness of a target material, taking the target thickness of the target material as a pre-swing roll gap value of the rolling mill and rolling the target material;
the control module is used for sampling once every preset time at intervals in the initial stage of rolling to obtain the actual rolling force born by the target material and the actual rolling thickness corresponding to the actual rolling force; calculating a roll gap pre-control adjustment quantity corresponding to each sampling based on the actual rolling force obtained by each sampling, adjusting the roll gap of the rolling mill to obtain a new roll gap given value, and continuously rolling the target material based on the new roll gap given value so as to perform the next sampling;
The judging module is used for determining that when the difference value between the actual rolling force obtained by the last sampling and the actual rolling force obtained by the last sampling is smaller than or equal to a first threshold value, and/or the actual rolling thickness corresponding to the actual rolling force obtained by the last sampling is smaller than or equal to the target thickness of the target material, stopping sampling;
The determining module is used for obtaining roll gap pre-control adjustment amounts corresponding to each sampling before the last sampling;
The roller gap pre-control adjustment amount corresponding to each sampling before the last sampling is obtained comprises the following steps:
and calculating roll gap pre-control adjustment amounts corresponding to the sampling according to the following formula:
ΔHpre(i)＝β[(k1+k2)(Pi-Pi-1)]+(1-β)ΔHpre(i-1)；
Wherein, delta H pre(i) is the roll gap pre-control adjustment quantity corresponding to the ith sampling; ΔH pre(i-1) is the roll gap pre-control adjustment amount corresponding to the i-1 th sampling; beta is a pre-control adjusting intensity coefficient; k 1 is the yield strength calculation coefficient of the target material; k 2 is the rigidity coefficient of the rolling mill; p i is the actual rolling force obtained by the ith sampling; the actual rolling force obtained by sampling P i-1 th time i-1 th time; i is the sampling times;
Summing the roll gap pre-control adjustment values corresponding to the sampling for each time to obtain a roll gap pre-control adjustment value corresponding to the last sampling;
and determining the roll gap pre-control adjusting value corresponding to the last sampling as the roll gap pre-control adjusting value of the current pass.
5. An electronic device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the method of determining a roll gap pre-control adjustment value according to any one of claims 1-3 when executing the computer program.
6. A computer readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the method of determining a roll gap pre-control adjustment value according to any of claims 1-3.
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CN113941606A (en) * 2021-09-26 2022-01-18 中冶南方工程技术有限公司 Small-time lag control method for cold-rolling full-hydraulic multi-roller straightening roll gap

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CH516954A (en) * 1969-08-06 1971-12-31 Bbc Brown Boveri & Cie Preadjusting cold-rolling mill nip control
RU2204451C2 (en) * 2001-01-16 2003-05-20 Открытое акционерное общество "Новолипецкий металлургический комбинат" Method for determining initial interroll gap at tuning rolling stand
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