CN112122358A - Plate shape target curve setting method considering plate shape requirements of subsequent process - Google Patents
Plate shape target curve setting method considering plate shape requirements of subsequent process Download PDFInfo
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- CN112122358A CN112122358A CN202010956324.8A CN202010956324A CN112122358A CN 112122358 A CN112122358 A CN 112122358A CN 202010956324 A CN202010956324 A CN 202010956324A CN 112122358 A CN112122358 A CN 112122358A
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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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
Abstract
The invention provides a method for setting a plate shape target curve in consideration of plate shape requirements of a subsequent process, which comprises the following steps: s1: setting the plate shape requirement according to the plate shape requirement of the subsequent process; s2: setting parameters of a rolling mill, parameters of a rolled piece and parameters of a processing technology; s3: inputting the plate shape and the plate thickness prediction model to obtain outlet thickness distribution and residual stress distribution; s4: inputting the residual stress distribution instability judgment model into a plate shape instability judgment model to judge the residual stress distribution instability; s5: inputting the shape into a shape pattern recognition model for shape separation; s6: a target curve in the shape of a plate is formed. The invention combines the plate shape target curve with the rolling mill control parameter by calculating the plate shape and the plate thickness in the rolling process, plays a certain optimization role on the processing parameter, reduces the pressure of the rolling mill plate shape control system, wherein the calculated plate shape target is used as reference for the subsequent process, can avoid the problems in the subsequent process, and improves the production efficiency and the product quality.
Description
Technical Field
The invention relates to the technical field of plate and strip processing, in particular to a method for setting a plate shape target curve by considering the plate shape requirement of a subsequent process.
Background
The quality of the plate shape of the plate and strip materials is always a major concern in the rolling process, and the plate shape control of the plate and strip materials in the rolling process should be performed through the integral control of the rolling process. The plate-shaped target curve in the actual production at present is not particularly good in use condition, and is selected according to experience in most cases. The existing patent technology such as the setting method of the target plate shape curve of the cold-rolled steel strip with the patent number of CN201910527827.0 and the computer equipment describe the method for setting the target plate shape curve by using the subsequent process; the method for setting and matching the technological parameters of the multi-pass and multi-stand rolling of the aluminum cold continuous rolling mill with the patent number of CN201210411539.7 sets the parameters according to the parameters of rolling mill equipment, wherein the former sets the parameters by utilizing the subsequent process, but the former completely depends on the subsequent process, and the latter only optimizes the technological parameters by using the rolling equipment, so that the technology does not completely combine the rolling mill, the rolled piece and the technological parameters.
Disclosure of Invention
According to the technical problem, a method for setting a shape target curve considering the shape requirement of the subsequent process is provided.
The technical means adopted by the invention are as follows:
a method for setting a plate shape target curve considering plate shape requirements of a subsequent process comprises the following steps:
s1: setting a plate shape requirement according to the plate shape requirement of the subsequent process, wherein the plate shape requirement is that one component of a primary plate shape component, a secondary plate shape component, a tertiary plate shape component or a quartic plate shape component of the plate shape is selected as the plate shape requirement;
s2: setting parameters of a rolling mill, parameters of a rolled piece and parameters of a processing technology;
s3: inputting the parameters of the rolling mill, the parameters of a rolled piece and the parameters of a processing process into a plate shape and plate thickness forecasting model to obtain outlet thickness distribution and residual stress distribution;
s4: inputting the residual stress distribution, the processing technological parameters, the rolled piece parameters and the outlet thickness distribution into a plate shape instability judging model for judging the instability of the residual stress distribution, if the residual stress distribution is unstable, returning to S2 to readjust the rolling mill parameters, the rolled piece parameters and the processing technological parameters, and repeating the step S3 until the residual stress distribution is not unstable;
s5: inputting the residual stress distribution after the step S4 into a plate shape pattern recognition model for plate shape separation to obtain a corresponding value of the primary plate shape component, a corresponding value of the secondary plate shape component, a corresponding value of the tertiary plate shape component and a corresponding value of the quartic plate shape component;
selecting a corresponding value of the plate shape component corresponding to the plate shape requirement from the corresponding values of the four plate shape components to compare with the plate shape requirement, if the corresponding value of the plate shape component is not matched with the plate shape requirement, adjusting the processing technological parameter corresponding to the plate shape component, and repeating S2-S4 until the corresponding value of the plate shape component is matched with the plate shape requirement;
s6: and fitting the residual stress distribution obtained by the last calculation in the step S4 to form a plate-shaped target curve, and outputting the plate-shaped target curve and the processing technological parameters obtained in the step S2 in the last calculation.
The form of the target curve fit for the shape is as follows:
B6、B4、B2and B0Respectively are plate shape fitting parameters; and B is the width of the rolled piece.
Further, the processing parameters comprise roll bending force, roll shifting amount, roll convexity, roll inclination amount and tension parameters.
Further, the primary plate shape component corresponds to the left wave and the right wave of the plate shape;
the secondary plate shape component corresponds to the middle wave and the double-side wave of the plate shape;
the third plate shape component corresponds to the right trisection and the left trisection of the plate shape;
the fourth-time plate shape component corresponds to four wave lengths and edge middle wave lengths of the plate shape.
Further, the primary sheet shape component is adjusted by adjusting the roll inclination amount;
the tertiary plate shape component is adjusted by adjusting the roll shifting amount;
the secondary strip shape component and the quartic strip shape component are adjusted by adjusting the roll bending force and the roll crown.
Compared with the prior art, the invention has the following advantages:
1. the strip shape control capability of the rolling mill is fully considered, and the performance of the rolling mill is more comprehensively exerted.
2. The rolling parameters are preset more accurately, and the rolling mill plate shape regulation and control reference is more accurate.
3. The plate shape setting considers the subsequent processing technology, and the stable through plate of the subsequent annealing technology can be enhanced.
4. According to the invention, through setting the requirements on the plate shape, the subsequent adjustment process only needs to carry out targeted parameter adjustment on different components, and the adjustment is more accurate.
For the reasons, the invention can be widely popularized in the fields of plate shape subsequent processing and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of a method for setting a target profile curve in consideration of the requirements of the subsequent process for profile shape in the embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating the distribution of the thickness of the plate in accordance with the embodiment of the present invention.
FIG. 3 is a schematic diagram of the distribution of residual stress in an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, the invention provides a method for setting a plate shape target curve considering plate shape requirements of a subsequent process, which comprises the following steps:
s1: setting a plate shape requirement according to the plate shape requirement of the subsequent process, wherein the plate shape requirement is that one component of a primary plate shape component, a secondary plate shape component, a tertiary plate shape component or a quartic plate shape component of the plate shape is selected as the plate shape requirement;
s2: setting parameters of a rolling mill, parameters of a rolled piece and parameters of a processing technology;
s3: inputting the parameters of the rolling mill, the parameters of a rolled piece and the parameters of a processing process into a plate shape and plate thickness forecasting model to obtain outlet thickness distribution and residual stress distribution;
s4: inputting the residual stress distribution, the processing technological parameters, the rolled piece parameters and the outlet thickness distribution into a plate shape instability judging model for judging the instability of the residual stress distribution, if the residual stress distribution is unstable, returning to S2 to readjust the rolling mill parameters, the rolled piece parameters and the processing technological parameters, and repeating the step S3 until the residual stress distribution is not unstable;
s5: inputting the residual stress distribution after the step S4 into a plate shape pattern recognition model for plate shape separation to obtain a corresponding value of the primary plate shape component, a corresponding value of the secondary plate shape component, a corresponding value of the tertiary plate shape component and a corresponding value of the quartic plate shape component;
selecting a corresponding value of the plate shape component corresponding to the plate shape requirement from the corresponding values of the four plate shape components to compare with the plate shape requirement, if the corresponding value of the plate shape component is not matched with the plate shape requirement, adjusting the processing technological parameter corresponding to the plate shape component, and repeating S2-S4 until the corresponding value of the plate shape component is matched with the plate shape requirement;
s6: and fitting the residual stress distribution obtained by the last calculation in the step S4 to form a plate-shaped target curve, and outputting the plate-shaped target curve and the processing technological parameters obtained in the step S2 in the last calculation.
The form of the target curve fit for the shape is as follows:
B6、B4、B2and B0Respectively are plate shape fitting parameters; and B is the width of the rolled piece.
Further, the processing parameters comprise roll bending force, roll shifting amount, roll convexity, roll inclination amount and tension parameters.
Further, the primary plate shape component corresponds to the left wave and the right wave of the plate shape;
the secondary plate shape component corresponds to the middle wave and the double-side wave of the plate shape;
the third plate shape component corresponds to the right trisection and the left trisection of the plate shape;
the fourth-time plate shape component corresponds to four wave lengths and edge middle wave lengths of the plate shape.
Further, the primary sheet shape component is adjusted by adjusting the roll inclination amount;
the tertiary plate shape component is adjusted by adjusting the roll shifting amount;
the secondary strip shape component and the quartic strip shape component are adjusted by adjusting the roll bending force and the roll crown.
The actual production data of the four-high mill of a certain plate and strip processing enterprise is selected as the calculation data, and the secondary component of the target plate shape is required to exceed 70%.
The parameters of the rolling mill are as follows:
the initial process parameters are set as follows:
the plate belt incoming material parameters are as follows:
calculating the data according to the method;
through calculation, the results are as follows:
the process and control parameters are set as follows:
the calculated thickness of the plate is shown in figure 2, and the distribution of the residual stress of the plate is shown in figure 3;
fitting the plate shape to obtain parameters of a plate shape target curve expression:
finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A method for setting a plate shape target curve in consideration of plate shape requirements of a subsequent process is characterized by comprising the following steps:
s1: setting a plate shape requirement according to the plate shape requirement of the subsequent process, wherein the plate shape requirement is that one component of a primary plate shape component, a secondary plate shape component, a tertiary plate shape component or a quartic plate shape component of the plate shape is selected as the plate shape requirement;
s2: setting parameters of a rolling mill, parameters of a rolled piece and parameters of a processing technology;
s3: inputting the parameters of the rolling mill, the parameters of a rolled piece and the parameters of a processing process into a plate shape and plate thickness forecasting model to obtain outlet thickness distribution and residual stress distribution;
s4: inputting the residual stress distribution, the processing technological parameters, the rolled piece parameters and the outlet thickness distribution into a plate shape instability judging model for judging the instability of the residual stress distribution, if the residual stress distribution is unstable, returning to S2 to readjust the rolling mill parameters, the rolled piece parameters and the processing technological parameters, and repeating the step S3 until the residual stress distribution is not unstable;
s5: inputting the residual stress distribution after the step S4 into a plate shape pattern recognition model for plate shape separation to obtain a corresponding value of the primary plate shape component, a corresponding value of the secondary plate shape component, a corresponding value of the tertiary plate shape component and a corresponding value of the quartic plate shape component;
selecting a corresponding value of the plate shape component corresponding to the plate shape requirement from the corresponding values of the four plate shape components to compare with the plate shape requirement, if the corresponding value of the plate shape component is not matched with the plate shape requirement, adjusting the processing technological parameter corresponding to the plate shape component, and repeating S2-S4 until the corresponding value of the plate shape component is matched with the plate shape requirement;
s6: and fitting the residual stress distribution obtained by the last calculation in the step S4 to form a plate-shaped target curve, and outputting the plate-shaped target curve and the processing technological parameters obtained in the step S2 in the last calculation.
2. A method for setting a target curve of a plate shape considering requirements of a subsequent process plate shape as claimed in claim 1, wherein the processing parameters include roll bending force, roll shifting amount, roll crown, roll tilting amount and tension parameters.
3. The setting method of the target curve of the strip shape considering the requirement of the strip shape in the subsequent process according to claim 2, wherein the primary strip shape component corresponds to a left edge wave and a right edge wave of the strip shape;
the secondary plate shape component corresponds to the middle wave and the double-side wave of the plate shape;
the third plate shape component corresponds to the right trisection and the left trisection of the plate shape;
the fourth-time plate shape component corresponds to four wave lengths and edge middle wave lengths of the plate shape.
4. The method of claim 3, wherein the target profile setting method is a method for setting a profile shape in consideration of a profile shape requirement of a subsequent process,
the primary plate shape component is adjusted by adjusting the roll inclination amount;
the tertiary plate shape component is adjusted by adjusting the roll shifting amount;
the secondary strip shape component and the quartic strip shape component are adjusted by adjusting the roll bending force and the roll crown.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113319127A (en) * | 2021-06-10 | 2021-08-31 | 燕山大学 | Method for setting plate-shaped target curve by considering target convexity |
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