CN114833203A - Dynamic calibration method and system for gravity torque of loop of finishing mill - Google Patents
Dynamic calibration method and system for gravity torque of loop of finishing mill Download PDFInfo
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- CN114833203A CN114833203A CN202210297959.0A CN202210297959A CN114833203A CN 114833203 A CN114833203 A CN 114833203A CN 202210297959 A CN202210297959 A CN 202210297959A CN 114833203 A CN114833203 A CN 114833203A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters
- B21B41/12—Arrangements of interest only with respect to provision for indicating or controlling operations
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Abstract
The invention discloses a dynamic calibration method and a dynamic calibration system for the gravity torque of a loop of a finishing mill, and relates to the technical field of calibration of the gravity torque of the loop of the finishing mill. According to the invention, the self-weight torque of the loop corresponding to each target loop angle is collected, a linear expression of the self-weight torque of the loop corresponding to any loop angle is obtained through any loop angle between two adjacent target loop angles according to the two adjacent target loop angles and the self-weight torque of the loop corresponding to two adjacent target loop angles, the self-weight torque of the loop corresponding to any loop angle can be obtained, each linear expression is solidified into an operation program of the loop, the subsequent loop operates according to the calibrated gravity torque of the loop, the gravity torque of the loop changes along with the change of the loop angle, the phenomena of strip steel narrowing, loop shaking, strip steel wave and the like can be avoided, and the quality of rolled products is improved.
Description
Technical Field
The invention relates to the technical field of calibration of a loop gravity torque of a finishing mill, in particular to a dynamic calibration method and a dynamic calibration system for the loop gravity torque of the finishing mill.
Background
The loop control is a complex digital closed-loop control, and the moment and the operation setting of the loop are calculated strictly according to a mechanical or kinematic formula in the stages of loop starting, tension continuous rolling, loop falling and the like in strip steel rolling, and besides, the rolling working condition can also have certain influence on the control. The gravity torque of the loop comes from the moment generated by the self weight of the loop body and an internal cooling device contained in the loop, and in the actual test, the weight is the weight of the loop body and the gravity action generated by cooling water.
The traditional method for setting the gravity torque of the loop is to solidify the angle of the loop and the corresponding gravity torque into a set program, and the gravity torque is kept constant in the whole running period of the loop. Because the mechanical structure of the loop is complex and comprises a loop shaft, a bearing support, a loop frame with the bearing support, a loop roller and a hydraulic cylinder, the dead weight torque of the loop is easily influenced by replacement or abrasion of any structure, and when the actual gravity torque of the loop is smaller than the set torque, the problems that the force in the loop starting stage is too large, the tension of the loop contacting with strip steel is large, the actual tension in the tension continuous rolling stage is larger than the set tension and the like are often easily caused, and the strip steel is narrowed and the like are caused; when the actual gravity torque of the loop is greater than the set torque, the problems that the loop starting stage cannot start, the actual tension of the tension continuous rolling stage is smaller than the set tension and the like are often caused, the phenomena of loop shaking, strip steel wave and the like are caused, and the rolling stability and the quality of rolled products are not facilitated. Therefore, in the conventional method of setting the weight torque of the loop, the weight torque is kept constant to deteriorate the quality of the rolled product.
Disclosure of Invention
The invention provides a dynamic calibration method and a dynamic calibration system for the gravity torque of a loop of a finishing mill, and solves the technical problems that the quality of a rolled product is reduced because the gravity torque of the loop is kept constant in the prior art.
On one hand, the embodiment of the invention provides the following technical scheme:
a dynamic calibration method for the gravity torque of a loop of a finishing mill comprises the following steps:
acquiring a plurality of target loop angles for dynamic calibration of the loop gravity torque;
when the loop runs, acquiring the loop dead weight torque corresponding to each target loop angle;
according to two adjacent target loop angles and the loop self-weight torque corresponding to the two adjacent target loop angles, constructing a linear expression for solving the loop self-weight torque corresponding to any loop angle through any loop angle between the two adjacent target loop angles;
and solidifying each linear expression into the running program of the loop to finish the dynamic calibration of the gravity torque of the loop.
Preferably, when the loop runs, acquiring the loop dead weight torque corresponding to each target loop angle includes:
continuously acquiring the self-weight torque of the loop when the loop runs, and acquiring the actual loop angle when the self-weight torque of the loop is acquired;
and acquiring the smallest of all the actual loop angles which are larger than or equal to the target loop angle, and setting the loop dead weight torque corresponding to the smallest as the loop dead weight torque corresponding to the target loop angle.
Preferably, the constructing a linear expression for calculating the loop dead weight torque corresponding to any loop angle between two adjacent target loop angles according to two adjacent target loop angles and the loop dead weight torque corresponding to the two adjacent target loop angles includes:
θ N for the Nth said target loop angle, T N Is theta N Corresponding to said loop dead weight torque, theta N+1 For the N +1 th target loop angle, T N+1 Is theta N+1 Corresponding self-weight torque of the loop, N is a positive integer, theta FBK Is theta N And theta N+1 At said arbitrary loop angle, T FBK Is theta FBK And the corresponding self-weight torque of the loop.
Preferably, after the linear expression of the loop deadweight torque corresponding to any loop angle is obtained through any loop angle between two adjacent target loop angles according to two adjacent target loop angles and the loop deadweight torque corresponding to the two adjacent target loop angles, the step of solidifying each linear expression into the running program of the loop further includes:
and judging whether burrs or shaking phenomena occur in the friction force test of the loop according to the linear expressions, if so, solidifying the pre-obtained constant loop gravity torque into the running program of the loop, otherwise, executing the step of solidifying each linear expression into the running program of the loop, and finishing the dynamic calibration of the loop gravity torque.
On the other hand, the embodiment of the invention also provides the following technical scheme:
a dynamic calibration system for loop gravity torque of a finishing mill comprises:
the target loop angle acquisition module is used for acquiring a plurality of set target loop angles for dynamic calibration of the loop gravity torque;
the loop deadweight torque acquisition module is used for acquiring loop deadweight torque corresponding to each target loop angle when the loop runs;
the loop deadweight torque calculation module is used for constructing a linear expression for calculating the loop deadweight torque corresponding to any loop angle between two adjacent target loop angles according to the two adjacent target loop angles and the loop deadweight torque corresponding to the two adjacent target loop angles;
and the loop gravity torque calibration module is used for solidifying each linear expression into an operation program of the loop to complete dynamic calibration of the loop gravity torque.
Preferably, the loop deadweight torque acquisition module is further configured to:
continuously acquiring the self-weight torque of the loop when the loop runs, and acquiring the actual loop angle when the self-weight torque of the loop is acquired;
and acquiring the smallest of all the actual loop angles which are larger than or equal to the target loop angle, and setting the loop dead weight torque corresponding to the smallest as the loop dead weight torque corresponding to the target loop angle.
Preferably, the loop deadweight torque solving module is further configured to construct the linear expression:
θ N for the Nth said target loop angle, T N Is theta N Corresponding to said loop dead weight torque, theta N+1 For the N +1 th target loop angle, T N+1 Is theta N+1 Corresponding self-weight torque of the loop, N is a positive integer, theta FBK Is theta N And theta N+1 At said arbitrary loop angle, T FBK Is theta FBK And the corresponding self-weight torque of the loop.
Preferably, the loop gravity torque calibration module is further configured to:
and judging whether burrs or shaking phenomena occur in the friction force test of the loop according to the linear expressions, if so, solidifying the pre-obtained constant loop gravity torque into the running program of the loop, otherwise, executing the step of solidifying each linear expression into the running program of the loop, and finishing the dynamic calibration of the loop gravity torque.
On the other hand, the embodiment of the invention also provides the following technical scheme:
an electronic device comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the dynamic calibration method for the loop gravity torque of any finishing mill is realized.
On the other hand, the embodiment of the invention also provides the following technical scheme:
a computer readable storage medium, which when executed implements any of the above methods for dynamic calibration of looper gravitational torque for a finishing mill.
One or more technical schemes provided by the invention at least have the following technical effects or advantages:
the method comprises the steps of collecting the loop dead weight torque corresponding to each target loop angle, constructing a linear expression of the loop dead weight torque corresponding to any loop angle according to two adjacent target loop angles and the loop dead weight torques corresponding to two adjacent target loop angles, obtaining the loop dead weight torque corresponding to any loop angle, solidifying each linear expression into an operation program of the loop, operating the subsequent loops according to the calibrated loop gravity torque, and enabling the loop gravity torque to change along with the change of the loop angles, so that the phenomena of strip steel narrowing, loop shaking, strip steel wave rising and the like can be avoided, and the quality of rolled products is improved.
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 flow chart of a dynamic calibration method for the gravity torque of a loop of a finishing mill in the embodiment of the invention;
FIG. 2 is a schematic diagram of dynamic calibration of loop gravitational torque in an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a loop gravity torque dynamic calibration system of a finishing mill in the embodiment of the invention.
Detailed Description
The embodiment of the invention provides a dynamic calibration method and a dynamic calibration system for the gravity torque of the loop of the finishing mill, and solves the technical problems that the quality of a rolled product is reduced because the gravity torque of the loop is kept constant in the prior art.
In order to better understand the technical scheme of the invention, the technical scheme of the invention is described in detail in the following with the accompanying drawings and specific embodiments.
First, it is stated that the term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
As shown in fig. 1, the dynamic calibration method for the loop gravity torque of the finishing mill of the embodiment includes:
step S1, acquiring a plurality of target loop angles for dynamic calibration of loop gravity torque;
step S2, collecting the self-weight torque of the loop corresponding to each target loop angle when the loop runs;
step S3, according to two adjacent target loop angles and loop dead weight torques corresponding to the two adjacent target loop angles, constructing a linear expression for solving the loop dead weight torque corresponding to any loop angle through any loop angle between the two adjacent target loop angles;
and step S4, solidifying each linear expression into the running program of the loop, and completing the dynamic calibration of the gravity torque of the loop.
When the loop runs, in a running period, the loop angle firstly runs from the waiting position to the highest point and then returns to the waiting position from the highest point.
In step S1, taking the operating range of the loop angle as an example of 10 to 60 °, the target loop angle may be set to 10 °, 15 °, 20 °, 25 °, 30 °, 40 °, 50 °, 60 °, and the like.
In step S2, the self-weight torque of the loop is collected during the friction test of the loop, and when the friction test of the loop is performed, the loop is moved from the waiting position to the highest point and then returns to the waiting position from the highest point. In the process of acquiring the self-weight torque of the loop, if the actual loop angle is just at the target loop angle when the self-weight torque of the loop is acquired every time, if the actual loop angle is 10 degrees during the first acquisition, the actual loop angle is 15 degrees during the second acquisition, the actual loop angle is 20 degrees during the third acquisition, and the like, the self-weight torque of the loop acquired every time can be directly used as the self-weight torque of the loop corresponding to the target loop angle at the moment. However, in the actual collecting process, since the collecting period is generally fixed, there is a case that the actual loop angle is not at the target loop angle when the loop deadweight torque is collected, for example, when the loop deadweight torque is continuously collected for a certain number of times, the actual loop angle is 14.99 °, 15.01 °, and 15.02 ° in sequence, so that the loop deadweight torque corresponding to the target loop angle of 15 ° cannot be directly obtained. For this reason, the step S2 of this embodiment preferably includes:
continuously acquiring the dead weight torque of the loop when the loop runs, and acquiring the actual loop angle when the dead weight torque of the loop is acquired;
and acquiring the smallest of all actual loop angles which are larger than or equal to the target loop angle, and setting the loop dead weight torque corresponding to the smallest as the loop dead weight torque corresponding to the target loop angle.
Therefore, if the actual loop angles are 14.99 degrees, 15.01 degrees and 15.02 degrees in sequence when the loop deadweight torque is continuously acquired for a certain number of times, and all the actual loop angles which are larger than or equal to the target loop angle of 15 degrees comprise 15.01 degrees and 15.02 degrees, the loop deadweight torque acquired when the actual loop angle is 15.01 degrees is set as the loop deadweight torque corresponding to the target loop angle of 15 degrees. Therefore, the self-weight torque of the loop corresponding to each target loop angle can be acquired, and the situation that the gravity torque of a set angle cannot be acquired due to the influence of a scanning period of a computer is avoided.
In step S3, since the loop angle during the loop operation may be at any position, and only the loop dead-weight torques corresponding to the target loop angles are obtained in step S2, the incomplete loop dead-weight torques cannot be adopted during the subsequent loop operation, and the loop dead-weight torques corresponding to any loop angle need to be obtained. For this reason, the step S3 in this embodiment preferably includes:
θ N is the Nth target loop angle, T N Is theta N Corresponding loop dead weight torque, theta N+1 Is the (N + 1) th target loop angle, T N+1 Is theta N+1 Corresponding loop dead weight torque, N is positive integer, theta FBK Is theta N And theta N+1 Any angle of loop between, T FBK Is theta FBK The corresponding self-weight torque of the loop.
As shown in FIG. 2, assume θ 1 ＝20°、T 1 ＝5000NM、θ 2 ＝25°、T 2 4000NM, and any loop angle θ between 20 ° and 25 ° FBK Corresponding loop dead weight torque T FBK ＝
Therefore, any loop angle between every two adjacent target loop angles and the corresponding loop self-weight torque have a linear expression, a plurality of linear expressions in a loop operation period can be obtained, each linear expression can draw a line segment, and all the linear expressions can draw a multi-segment broken line. Therefore, the self-weight torque of the loop corresponding to any loop angle can be obtained.
In step S4, the linear expression obtained in step S3 is solidified into the loop running program, so that dynamic calibration of the loop gravity torque can be completed, and the subsequent loop runs according to the calibrated loop gravity torque, which changes with the change of the loop angle.
As can be seen from the above, in the present embodiment, the loop deadweight torque corresponding to each target loop angle is collected, according to two adjacent target loop angles and the loop deadweight torques corresponding to two adjacent target loop angles, a linear expression of the loop deadweight torque corresponding to any loop angle is found through any loop angle between two adjacent target loop angles, each linear expression is solidified into the running program of the loop, the subsequent loop runs according to the calibrated loop gravity torque, and the loop gravity torque changes along with the change of the loop angle, so that the phenomena of strip steel narrowing, loop shaking, strip steel wave and the like can be avoided, and the quality of the rolled product is improved.
Of course, in this embodiment, the dynamic calibration of the loop gravity torque is not performed in any condition through steps S1 to S4, and in some cases, if the loop is operated according to the dynamically calibrated loop gravity torque, undesirable phenomena such as burrs and shaking may occur in the friction force test of the loop, and the loop cannot be operated according to the dynamically calibrated loop gravity torque, but needs to be operated according to the constant loop gravity torque set according to the conventional method. For this reason, in this embodiment, after step S3 and before step S4, the method for dynamically calibrating the loop gravity torque of the finishing mill further includes:
and judging whether burrs or shaking occur in the friction force test of the loop according to the linear expressions, if so, solidifying the pre-obtained constant loop gravity torque into the running program of the loop, otherwise, executing the step of solidifying each linear expression into the running program of the loop, and finishing the dynamic calibration of the loop gravity torque.
Thus, if the loop runs according to the dynamically calibrated loop gravity torque, burrs or shaking phenomena cannot occur, the loop gravity torque is dynamically calibrated through the steps S1-S4, if the loop runs according to the dynamically calibrated loop gravity torque, the burrs or shaking phenomena occur, the constant loop gravity torque obtained in advance is solidified into the running program of the loop, the subsequent loop runs according to the constant gravity torque, and the burrs or shaking phenomena in the friction force test are avoided.
As shown in fig. 3, the present embodiment further provides a dynamic calibration system for loop gravity torque of a finishing mill, including:
the target loop angle acquisition module is used for acquiring a plurality of set target loop angles for dynamic calibration of the loop gravity torque;
the loop deadweight torque acquisition module is used for acquiring loop deadweight torque corresponding to each target loop angle when the loop runs;
the loop deadweight torque calculation module is used for constructing a linear expression for calculating loop deadweight torque corresponding to any loop angle through any loop angle between two adjacent target loop angles according to the two adjacent target loop angles and the loop deadweight torque corresponding to the two adjacent target loop angles;
and the loop gravity torque calibration module is used for solidifying each linear expression into the running program of the loop to complete the dynamic calibration of the loop gravity torque.
Wherein, loop dead weight torque acquisition module still is used for: continuously acquiring the dead weight torque of the loop when the loop runs, and acquiring the actual loop angle when the dead weight torque of the loop is acquired; and acquiring the smallest of all actual loop angles which are larger than or equal to the target loop angle, and setting the loop dead weight torque corresponding to the smallest as the loop dead weight torque corresponding to the target loop angle. Therefore, the self-weight torque of the loop corresponding to each target loop angle can be acquired.
Wherein, loop dead weight torque is solved the module, still is used for constructing the linear expression:
θ N is the Nth target loop angle, T N Is theta N Corresponding loop dead weight torque, theta N+1 Is the (N + 1) th target loop angle, T N+1 Is theta N+1 Corresponding loop dead weight torque, N is positive integer, theta FBK Is theta N And theta N+1 Any angle of loop between, T FBK Is theta FBK The corresponding self-weight torque of the loop. Therefore, the self-weight torque of the loop corresponding to any loop angle can be obtained.
Wherein, loop gravity torque calibration module still is used for: and judging whether burrs or shaking occur in the friction force test of the loop according to the linear expressions, if so, solidifying the pre-obtained constant loop gravity torque into the running program of the loop, otherwise, executing the step of solidifying each linear expression into the running program of the loop, and finishing the dynamic calibration of the loop gravity torque. Therefore, if the loop runs according to the dynamically calibrated loop gravity torque, burrs or shaking phenomena cannot occur, the loop gravity torque is dynamically calibrated, if the loop runs according to the dynamically calibrated loop gravity torque, the burrs or shaking phenomena can occur, the constant loop gravity torque obtained in advance is solidified into a running program of the loop, and the subsequent loop runs according to the constant gravity torque, so that the burrs or shaking phenomena in the friction force test are avoided.
As can be seen from the above, in the present embodiment, the loop deadweight torque corresponding to each target loop angle is collected, according to two adjacent target loop angles and the loop deadweight torques corresponding to two adjacent target loop angles, a linear expression of the loop deadweight torque corresponding to any loop angle is found through any loop angle between two adjacent target loop angles, each linear expression is solidified into the running program of the loop, the subsequent loop runs according to the calibrated loop gravity torque, and the loop gravity torque changes along with the change of the loop angle, so that the phenomena of strip steel narrowing, loop shaking, strip steel wave and the like can be avoided, and the quality of the rolled product is improved.
Based on the same inventive concept as the loop gravity torque dynamic calibration method of the finishing mill described above, this embodiment further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of any one of the methods of the loop gravity torque dynamic calibration method of the finishing mill described above when executing the program.
Where a bus architecture (represented by a bus) is used, the bus may comprise any number of interconnected buses and bridges that link together various circuits including one or more processors, represented by a processor, and memory, represented by a memory. The bus may also link various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the receiver and transmitter. The receiver and transmitter may be the same element, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor is responsible for managing the bus and general processing, while the memory may be used for storing data used by the processor in performing operations.
Since the electronic device described in this embodiment is an electronic device used for implementing the dynamic calibration method for the loop gravity torque of the finishing mill in the embodiment of the present invention, based on the dynamic calibration method for the loop gravity torque of the finishing mill in the embodiment of the present invention, a person skilled in the art can understand the specific implementation manner and various variations of the electronic device in this embodiment, so that a detailed description of how the electronic device implements the method in the embodiment of the present invention is omitted here. As long as those skilled in the art implement the electronic device used in the method for dynamically calibrating the gravity torque of the loop of the finishing mill in the embodiment of the present invention, the electronic device is within the scope of the present invention.
Based on the same inventive concept as the loop gravity torque dynamic calibration method of the finishing mill, the invention also provides a computer readable storage medium, and the computer readable storage medium realizes any loop gravity torque dynamic calibration method of the finishing mill when being executed.
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 (10)
1. A dynamic calibration method for the gravity torque of a loop of a finishing mill is characterized by comprising the following steps:
acquiring a plurality of target loop angles for dynamic calibration of the loop gravity torque;
when the loop runs, acquiring the loop dead weight torque corresponding to each target loop angle;
according to two adjacent target loop angles and the loop self-weight torque corresponding to the two adjacent target loop angles, constructing a linear expression for solving the loop self-weight torque corresponding to any loop angle through any loop angle between the two adjacent target loop angles;
and solidifying each linear expression into the running program of the loop to finish the dynamic calibration of the gravity torque of the loop.
2. The dynamic calibration method for the gravity torque of the loop of the finishing mill as recited in claim 1, wherein the step of collecting the dead weight torque of the loop corresponding to each target loop angle during the operation of the loop comprises the following steps:
continuously acquiring the self-weight torque of the loop when the loop runs, and acquiring the actual loop angle when the self-weight torque of the loop is acquired;
and acquiring the smallest of all the actual loop angles which are larger than or equal to the target loop angle, and setting the loop dead weight torque corresponding to the smallest as the loop dead weight torque corresponding to the target loop angle.
3. The dynamic calibration method for the gravity torque of the loop of the finishing mill as recited in claim 1, wherein the step of constructing a linear expression for calculating the gravity torque of the loop corresponding to any loop angle through any loop angle between two adjacent target loop angles according to two adjacent target loop angles and the gravity torque of the loop corresponding to the two adjacent target loop angles comprises:
θ N for the Nth said target loop angle, T N Is theta N Corresponding to said loop dead weight torque, theta N+1 For the N +1 th target loop angle, T N+1 Is theta N+1 Corresponding self-weight torque of the loop, N is a positive integer, theta FBK Is theta N And theta N+1 At said arbitrary loop angle, T FBK Is theta FBK And the corresponding self-weight torque of the loop.
4. The dynamic calibration method for the loop gravity torque of the finishing mill according to claim 1, wherein after the linear expression of the loop gravity torque corresponding to any loop angle is obtained through any loop angle between two adjacent target loop angles according to two adjacent target loop angles and the loop gravity torque corresponding to the two adjacent target loop angles, the linear expression is solidified into the running program of the loop, and before the dynamic calibration of the loop gravity torque is completed, the method further comprises:
and judging whether burrs or shaking phenomena occur in the friction force test of the loop according to the linear expressions, if so, solidifying the pre-obtained constant loop gravity torque into the running program of the loop, otherwise, executing the step of solidifying each linear expression into the running program of the loop, and finishing the dynamic calibration of the loop gravity torque.
5. A dynamic calibration system for loop gravity torque of a finishing mill is characterized by comprising:
the target loop angle acquisition module is used for acquiring a plurality of set target loop angles for dynamic calibration of the loop gravity torque;
the loop deadweight torque acquisition module is used for acquiring loop deadweight torque corresponding to each target loop angle when the loop runs;
the loop deadweight torque calculation module is used for constructing a linear expression for calculating the loop deadweight torque corresponding to any loop angle between two adjacent target loop angles according to the two adjacent target loop angles and the loop deadweight torque corresponding to the two adjacent target loop angles;
and the loop gravity torque calibration module is used for solidifying each linear expression into an operation program of the loop to complete dynamic calibration of the loop gravity torque.
6. The dynamic calibration system for the gravity torque of the loop of the finishing mill as recited in claim 5, wherein the loop deadweight torque acquisition module is further configured to:
continuously acquiring the self-weight torque of the loop when the loop runs, and acquiring the actual loop angle when the self-weight torque of the loop is acquired;
and acquiring the smallest of all the actual loop angles which are larger than or equal to the target loop angle, and setting the loop dead weight torque corresponding to the smallest as the loop dead weight torque corresponding to the target loop angle.
7. The dynamic calibration method for the gravity torque of the loop of the finishing mill as recited in claim 5, wherein the loop deadweight torque calculation module is further configured to construct the linear expression:
θ N for the Nth said target loop angle, T N Is theta N Corresponding self weight of the loopTorque, theta N+1 For the N +1 th target loop angle, T N+1 Is theta N+1 Corresponding self-weight torque of the loop, N is a positive integer, theta FBK Is theta N And theta N+1 At said arbitrary loop angle, T FBK Is theta FBK And correspondingly, the self-weight torque of the loop.
8. The dynamic calibration method for loop gravitational torque of finishing mill as set forth in claim 5, wherein said loop gravitational torque calibration module is further configured to:
and judging whether burrs or shaking phenomena occur in the friction force test of the loop according to the linear expressions, if so, solidifying the pre-obtained constant loop gravity torque into the running program of the loop, otherwise, executing the step of solidifying each linear expression into the running program of the loop, and finishing the dynamic calibration of the loop gravity torque.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method for dynamic calibration of the loop gravitational torque of a finishing mill as claimed in any one of claims 1 to 4 when executing the program.
10. A computer readable storage medium, wherein the computer readable storage medium when executed implements the finishing mill loop gravity torque dynamic calibration method of any one of claims 1 to 4.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07265930A (en) * | 1994-03-31 | 1995-10-17 | Toshiba Corp | Control device for looper tension |
| JPH09136108A (en) * | 1995-11-10 | 1997-05-27 | Toshiba Corp | Controller for hot tandem mill |
| JP2001179321A (en) * | 1999-12-24 | 2001-07-03 | Kawasaki Steel Corp | Looper control method among stands of continuous type metal rolling machine |
| CN102773264A (en) * | 2011-05-11 | 2012-11-14 | 株式会社日立制作所 | Tension control device of hot mill and control method |
| CN104550259A (en) * | 2014-12-23 | 2015-04-29 | 北京首钢股份有限公司 | Loop pulling method of finishing mill and loop pulling and control device of finishing mill |
| CN113909307A (en) * | 2021-08-30 | 2022-01-11 | 北京首钢自动化信息技术有限公司 | Loop control method and device |
-
2022
- 2022-03-25 CN CN202210297959.0A patent/CN114833203B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07265930A (en) * | 1994-03-31 | 1995-10-17 | Toshiba Corp | Control device for looper tension |
| JPH09136108A (en) * | 1995-11-10 | 1997-05-27 | Toshiba Corp | Controller for hot tandem mill |
| JP2001179321A (en) * | 1999-12-24 | 2001-07-03 | Kawasaki Steel Corp | Looper control method among stands of continuous type metal rolling machine |
| CN102773264A (en) * | 2011-05-11 | 2012-11-14 | 株式会社日立制作所 | Tension control device of hot mill and control method |
| CN104550259A (en) * | 2014-12-23 | 2015-04-29 | 北京首钢股份有限公司 | Loop pulling method of finishing mill and loop pulling and control device of finishing mill |
| CN113909307A (en) * | 2021-08-30 | 2022-01-11 | 北京首钢自动化信息技术有限公司 | Loop control method and device |
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| CN114833203B (en) | 2023-05-05 |
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