Control method for automatically correcting roll gap deviation in rolling process of steckel mill

Abstract

The invention discloses a control method for automatically correcting roll gap deviation in the rolling process of a steckel mill, and belongs to the technical field of metallurgical automation control. The method comprises the steps that the thicknesses of outlets in the two sides of the head of strip steel are calculated according to the predicted rolling force of the head of the strip steel of the current pass and the rigidity, corresponding to the predicted rolling force, of the two sides of the mill; calculating a deviation pre-control value of the roll gap head before threading according to the outlet thicknesses on the two sides of the strip steel head, the rigidity on the two sides corresponding to the predicted rolling force and the plasticity of the rolled piece head; after the steekle mill bites steel, a certain amount of rolling force deviation is sampled, processed and then locked; the roll gap deviation on the two sides is corrected in real time according to the actual rolling force deviation change; after the steckel mill of the current pass throws steel, the roll gap deviation pre-control value of the next pass is preset according to the roll gap deviation before steel throwing; and after the steekle mill bites steel in the next pass, the above processes are repeated until the steekle mill finishes rolling in the last pass, and the roll gap deviation is preset again according to the predicted rolling force. The method solves the problem of strip steel deviation in the reversible pass rolling process of the steekle mill, and has positive significance in improving the rolling stability.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical automation control, in particular to a control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill. Background Art

[0002] In a Steckel mill, the reversible rolling process of the Steckel mill can cause strip deviation during the 3rd, 5th, and 7th passes of reversible rolling, especially as the strip continues to thin. This is due to factors such as mill stiffness, product plasticity, and tension in the front and rear coiling furnaces. Strip deviation is particularly severe when the Steckel mill and coiling furnace are not yet connected, and after the coiling furnace has finished rolling. Therefore, real-time correction of roll gap deviation during the reversible rolling process of the Steckel mill, combining mill stiffness, product plasticity, and rolling force deviation in a steady state, is crucial for resolving strip deviation during the reversible rolling process of the Steckel mill in a Steckel mill line.

[0003] Currently, no technology exists to correct roll gap deviation during the reversible rolling process of a Steckel mill in a Steckel rolling line. Patent application number CN112620356B proposes a method for controlling tail swing in thin-gauge coiled steel plates on a single-stand Steckel mill. The method includes a dynamic adjustment module for the operating clearance of the pusher bed during thin-gauge plate coiling, a single-motion control module for the pusher bed, and a new coiling furnace logic control module. Simultaneously, the method optimizes the plate head rectangularization control, production planning, heating process, and rolling process, enabling stable production of thin-gauge coiled steel plates (3.5-6mm) on the Steckel mill.

[0004] In summary, the existing technology lacks a method for real-time correction of roll gap deviation based on rolling conditions. This paper describes a control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill. This method effectively uses automated means to combine the rigidity of the mill, the plasticity of the rolled product, and the rolling force deviation in a stable state. This method corrects the roll gap deviation in real time, making the strip more stable during the reversible rolling process of the Steckel mill. This is of great significance for the stable production of the Steckel rolling line. Summary of the Invention

[0005] The present invention provides a control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill, so as to solve the technical problem of strip deviation during the reversible rolling process of the Steckel mill.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In one aspect, the present invention provides a control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill, comprising:

[0008] Calculate the exit thickness on both sides of the strip head based on the predicted rolling force of the strip head in the current pass and the stiffness on both sides of the rolling mill corresponding to the predicted rolling force;

[0009] Calculate the deviation pre-control value before the strip is passed through the roll gap head according to the exit thickness on both sides of the strip head, the predicted rolling force corresponding to the stiffness on both sides, and the plasticity of the rolled piece head;

[0010] After the Steckel mill bites the steel, a certain number of rolling force deviations are sampled and processed before being locked;

[0011] Correct the roll gap deviation on both sides in real time according to the actual rolling force deviation change;

[0012] After the current pass of the Steckel mill is finished, the roll gap deviation pre-control value of the next pass is preset according to the roll gap deviation before the steel is finished;

[0013] After the next pass of the Steckel mill bites the steel, the above process is repeated until the last pass of the Steckel mill is completed, and the roll gap deviation is preset again according to the predicted rolling force.

[0014] Furthermore, the calculation of the pre-controlled value of the roll gap deviation before the strip head passes through the strip in the current pass includes:

[0015] Calculate the exit thickness of both sides of the strip head based on the predicted rolling force of the strip head in the current pass, the stiffness of both sides of the rolling mill corresponding to the predicted rolling force, the real-time average roll gap of the stand in the current pass, the zero-adjustment rolling force in the current pass, and the exit thickness compensation value of both sides of the strip head in the current pass;

[0016] According to the calculated exit thickness on both sides of the strip head of the current pass, the stiffness on both sides of the rolling mill corresponding to the predicted rolling force, and the plasticity of the rolled piece head, the pre-control value of the roll gap deviation before the strip head of the current pass is calculated.

[0017] Furthermore, the calculation formula for the exit thickness of the strip head on both sides of the current pass is:

[0018]

[0019] Among them, h dr(i) h represents the thickness of the strip at the transmission side of the head at the i-th pass; op(i) represents the thickness of the strip head at the operating side of the i-th pass; S(i) represents the real-time average roll gap of the i-th pass; P s(i) represents the predicted rolling force of the strip head in the i-th pass; P0 represents the current stand zero adjustment rolling force; M dr(i) M represents the rolling mill transmission side stiffness corresponding to the predicted rolling force of the strip head at the i-th pass; op(i) represents the rolling mill operating side stiffness corresponding to the predicted rolling force of the strip head at the i-th pass; dr(i)It indicates the thickness compensation value of the strip head transmission side outlet of the i-th pass, and its value range is 0~0.5. op(i) It indicates the thickness compensation value at the exit of the strip head operating side of the i-th pass, and its value range is 0 to 0.5.

[0020] Furthermore, the calculation formula for the pre-control value of the roller gap deviation before the belt is threaded at the head of the current frame is:

[0021] S do(i) =S o(i) -S d(i)

[0022]

[0023] Among them, S do(i) It indicates the pre-control value of the roll gap deviation before the strip head of the current pass passes through the strip. It is used to pre-regulate the roll gap deviation before the strip head of the current pass passes through the strip. During pre-regulation, the transmission side roll gap is given plus S do(i) , the operating side roller gap setting minus S do(i) ;S o(i) Indicates the pre-adjustment of the roll gap on the operating side of the strip head in the current pass; S d(i) Indicates the pre-adjustment of the roll gap on the driving side of the strip head in the current pass; h dr(i) Indicates the current pass strip head transmission side exit thickness; h op(i) Indicates the thickness of the strip head at the operating side of the current pass; M dr(i) Indicates the rolling force of the strip head at the current pass, which is predicted by the rolling mill drive side stiffness; M op(i) Indicates the mill operating side stiffness corresponding to the predicted rolling force of the strip head in the current pass; K (i) Indicates the plasticity of the head of the rolled piece in the current rolling pass; G m(i) It represents the gain coefficient of the roll gap adjustment, and its value range is 0.2~1.5; S f(i) It represents the plasticity correction coefficient of the rolled piece, and its value range is 0.1 to 1.

[0024] Furthermore, after the Steckel mill bites the steel, a certain number of rolling force deviations are sampled, processed, and then locked, including:

[0025] After the current pass of the Steckel mill bites the steel, a certain number of rolling force deviations are sampled and locked after processing. If there is manual intervention in the roll gap deviation within the planned certain number, the same number of data will be resampled and locked after the manual intervention.

[0026] Furthermore, the locking formula for sampling a certain number of actual rolling force deviations is:

[0027]

[0028] Among them, Fdevl It indicates the locked value of the actual rolling force deviation of the rolling mill after a certain number of samples are taken in the current pass, where the rolling force deviation is defined as the operating side pressure minus the transmission side pressure; n indicates the number of samples, which is given by experience and ranges from 100 to 1000; m indicates the number of real-time samples; F dev Indicates the actual rolling force deviation of the rolling mill in the current pass.

[0029] Furthermore, the real-time correction of the roll gap deviation on both sides according to the actual rolling force deviation change includes:

[0030] According to the rolling force deviation variation during the current pass of the Steckel mill, the roll gap deviation correction is calculated and compensated to the given roll gap deviation.

[0031] Furthermore, the calculation formula for the roll gap deviation correction amount is:

[0032]

[0033] Among them, G od It indicates the roll gap deviation correction amount calculated according to the actual rolling force deviation change during the current pass of the Steckel mill; TA indicates the execution cycle when the controller calculates the roll gap deviation according to the rolling force deviation. This value is given by experience and ranges from 2 to 16; TI indicates the integration time when the controller calculates the roll gap deviation according to the rolling force deviation. This value is given by experience and ranges from 50 to 500; F dev(i) Indicates the real-time rolling force deviation of the i-th pass; F devl(i) Indicates the rolling force deviation locking value of the head of the i-th pass;

[0034] Furthermore, the roll gap deviation correction amount is calculated according to the rolling force deviation variation during the current pass of the Steckel mill, including:

[0035] Set rolling force deviation dead zone F de In order to avoid frequent correction of roll gap deviation, the roll gap deviation correction amount is calculated by combining the rolling force deviation dead zone with the following formula:

[0036]

[0037] Among them, F de Indicates the rolling force deviation dead zone used when calculating the roll gap deviation correction amount according to the actual rolling force deviation change during the current pass of the Steckel mill. This value is given based on experience and ranges from 5 to 20.

[0038] Furthermore, the roll gap deviation correction amount is calculated based on the rolling force deviation variation during the current pass of the Steckel mill, and is compensated to a given roll gap deviation, including:

[0039] If there is manual intervention, the rolling force deviation is sampled and locked again after the manual intervention, and the rolling force deviation target value is updated.

[0040] On the other hand, the present invention further provides an electronic device, comprising a processor and a memory; wherein the memory stores at least one instruction, and the instruction is loaded and executed by the processor to implement the above method.

[0041] In yet another aspect, the present invention further provides a computer-readable storage medium, wherein the storage medium stores at least one instruction, and the instruction is loaded and executed by a processor to implement the above method.

[0042] The beneficial effects brought about by the technical solution provided by the present invention include at least:

[0043] The present invention provides a control method for automatically correcting the roll gap deviation during the rolling process of a Steckel mill. The method calculates the outlet thickness of the strip head on both sides according to the predicted rolling force of the strip head in the current pass and the stiffness of the mill on both sides corresponding to the predicted rolling force; calculates the pre-control value of the roll gap deviation before the strip is threaded according to the outlet thickness of the strip head on both sides, the stiffness on both sides corresponding to the predicted rolling force, and the plasticity of the rolled piece head; after the Steckel mill bites the steel, a certain number of rolling force deviations are sampled, processed, and then locked; the roll gap deviations on both sides are corrected in real time according to the actual rolling force deviation changes; after the Steckel mill throws the steel in the current pass, the pre-control value of the roll gap deviation in the next pass is preset according to the roll gap deviation before throwing the steel; after the Steckel mill bites the steel in the next pass, the above process is repeated until the last pass of the Steckel mill is completed, and the roll gap deviation is preset again according to the predicted rolling force. Therefore, the roll gap deviation during the strip rolling process is corrected in real time through the rolling parameters of each pass of the Steckel mill, measured data, equipment characteristics, etc., which solves problems such as strip deviation during threading and rolling, and has positive significance for improving the stability of strip threading and rolling. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 1 is a flow chart of a control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill provided by an embodiment of the present invention;

[0046] Figure 2 Schematic diagram of a device for automatically correcting roll gap deviation during the rolling process of a Steckel mill provided by an embodiment of the present invention;

[0047] Description of reference numerals:

[0048] 21. Working roll; 22. Support roll; 23. Strip steel;

[0049] 31. Entrance coiling furnace; 32. Exit coiling furnace.

[0050] Figure 3 This is a system block diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0051] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0052] First, it should be noted that in the embodiments of the present invention, words such as "exemplarily" and "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as an "example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "exemplarily" is intended to present concepts in a concrete manner. In addition, in the embodiments of the present invention, the meaning of "and / or" can be both or either of the two.

[0053] First embodiment

[0054] This embodiment provides a control method for automatically correcting the roll gap deviation during the rolling process of a Steckel mill, which calculates the outlet thickness of the strip head on both sides according to the predicted rolling force of the strip head in the current pass and the stiffness of the mill on both sides corresponding to the predicted rolling force; calculates the pre-control value of the roll gap deviation before the strip is threaded according to the outlet thickness of the strip head on both sides, the stiffness on both sides corresponding to the predicted rolling force, and the plasticity of the rolled piece head; after the Steckel mill bites the steel, a certain number of rolling force deviations are sampled, processed, and then locked; the roll gap deviations on both sides are corrected in real time according to the actual rolling force deviation changes; after the Steckel mill throws the steel in the current pass, the pre-control value of the roll gap deviation in the next pass is preset according to the roll gap deviation before throwing the steel; after the Steckel mill bites the steel in the next pass, the above process is repeated until the last pass of the Steckel mill is completed, and the roll gap deviation is preset again according to the predicted rolling force.

[0055] The execution process of this method is as follows Figure 1 As shown, the following steps are included:

[0056] S1, calculate the exit thickness on both sides of the strip head based on the predicted rolling force of the strip head in the current pass and the stiffness on both sides of the rolling mill corresponding to the predicted rolling force;

[0057] Specifically, in this embodiment, the above S1 includes the following steps:

[0058] Calculate the exit thickness of both sides of the strip head based on the predicted rolling force of the strip head in the current pass, the stiffness of both sides of the rolling mill corresponding to the predicted rolling force, the real-time average roll gap of the stand in the current pass, the zero-adjustment rolling force in the current pass, and the exit thickness compensation value of both sides of the strip head in the current pass;

[0059] Among them, the calculation formula for the exit thickness on both sides of the strip head in the current pass is:

[0060]

[0061] Among them, h dr(i) Indicates the thickness of the strip head at the transmission side of the i-th pass, h op(i) represents the thickness of the strip head at the operating side of the i-th pass, S(i) represents the real-time average roll gap of the i-th pass, both in mm; P s(i) It indicates the predicted rolling force of the strip head in the i-th pass, P0 indicates the current stand zero adjustment rolling force, both in ton; M dr(i) M represents the rolling mill transmission side stiffness corresponding to the predicted rolling force of the strip head at the i-th pass. op(i) It represents the mill operating side stiffness corresponding to the predicted rolling force of the strip head in the i-th pass, and the unit is ton / mm; dr(i) It indicates the thickness compensation value of the strip head transmission side outlet of the i-th pass, and its value range is 0~0.5. op(i) It indicates the thickness compensation value at the exit of the strip head operating side of the i-th pass. Its value range is 0 to 0.5, and the unit is mm.

[0062] S2, calculates the deviation pre-control value before the strip is passed through the roll gap head according to the exit thickness on both sides of the strip head, the predicted rolling force corresponding to the stiffness on both sides, and the plasticity of the rolled piece head;

[0063] Specifically, in this embodiment, the above S2 includes the following steps:

[0064] Calculate the pre-control value of the roll gap deviation before strip threading at the head of the current pass based on the calculated exit thickness on both sides of the strip head of the current pass, the stiffness on both sides of the rolling mill corresponding to the predicted rolling force, and the plasticity of the rolled piece head;

[0065] Among them, the calculation formula for the pre-control value of the roller gap deviation before the belt is threaded at the head of the current frame is:

[0066] S do(i) =S o(i) -S d(i)

[0067]

[0068] Among them, S do(i)It indicates the pre-control value of the roll gap deviation before the strip head of the current pass passes through the strip. It is used to pre-regulate the roll gap deviation before the strip head of the current pass passes through the strip. During pre-regulation, the roll gap setting on the transmission side is added with S do(i) , the operating side roller gap setting minus S do(i) , S o(i) Indicates the pre-adjustment of the roll gap on the operating side of the strip head in the current pass, S d(i) Indicates the pre-adjustment of the roll gap on the driving side of the strip head in the current pass, h dr(i) Indicates the current pass strip head transmission side exit thickness, h op(i) Indicates the thickness of the strip head at the operating side of the current pass, in mm; M dr(i) Indicates the rolling mill transmission side stiffness corresponding to the predicted rolling force of the strip head in the current pass, M op(i) Indicates the mill operating side stiffness corresponding to the predicted rolling force of the strip head in the current pass, K (i) Indicates the plasticity of the head of the rolled piece in the current rolling pass, all digits are ton / mm; G m(i) It represents the gain coefficient of the roll gap adjustment, and its value range is 0.2~1.5; S f(i) It represents the plasticity correction coefficient of the rolled piece, and its value range is 0.1 to 1.

[0069] S3, after the Steckel mill bites the steel, a certain number of rolling force deviations are sampled and processed before being locked;

[0070] Specifically, in this embodiment, the above S3 includes the following steps:

[0071] After the current pass of the Steckel mill bites steel, a certain number of rolling force deviations are sampled and then locked. If there is manual intervention in the roll gap deviation within this planned certain number, the same number of data will be resampled and locked after the manual intervention.

[0072] The locking formula for sampling a certain number of actual rolling force deviations is:

[0073]

[0074] Among them, F devl It indicates the locked value of the actual rolling force deviation of the rolling mill after a certain number of samples are taken in the current pass. The unit is ton, where the rolling force deviation is defined as the operating side pressure minus the transmission side pressure. n indicates the number of samples, which is given by experience and ranges from 100 to 1000. m indicates the number of real-time samples. F dev Indicates the actual rolling force deviation of the rolling mill in the current pass, in ton.

[0075] S4, real-time correction of the roll gap deviation on both sides according to the actual rolling force deviation change;

[0076] Specifically, in this embodiment, the above S4 includes the following steps:

[0077] According to the rolling force deviation variation during the current pass of the Steckel mill, the roll gap deviation correction is calculated and compensated to the given roll gap deviation;

[0078] S41, the roller gap deviation correction amount is calculated using the following formula:

[0079]

[0080] Among them, G od It indicates the roll gap deviation correction amount calculated according to the actual rolling force deviation change during the current pass of the Steckel mill, and the unit is mm; TA indicates the execution cycle when the controller calculates the roll gap deviation according to the rolling force deviation. This value is given by experience, and the value range is 2 to 16, and the unit is ms; TI indicates the integration time when the controller calculates the roll gap deviation according to the rolling force deviation. This value is given by experience, and the value range is 50 to 500, and the unit is ms; F dev(i) Indicates the real-time rolling force deviation of the i-th pass, F devl(i) It indicates the locking value of the rolling force deviation at the head of the i-th pass, and the unit is ton.

[0081] S42, calculating the roll gap deviation correction amount according to the rolling force deviation variation during the current pass of the Steckel mill, includes:

[0082] Set rolling force deviation dead zone F de In order to avoid frequent correction of roll gap deviation, the roll gap deviation correction amount is calculated by combining the rolling force deviation dead zone with the following formula:

[0083]

[0084] Among them, F de It indicates the rolling force deviation dead zone used when calculating the roll gap deviation correction amount according to the actual rolling force deviation change during the current pass of the Steckel mill. The value is given by experience and its value range is 5 to 20, and the unit is ton.

[0085] S43: If there is manual intervention, after the manual intervention is completed, the rolling force deviation is resampled and locked, and the rolling force deviation target value is updated.

[0086] S5, after the current pass of the Steckel mill is cast, the roll gap deviation pre-control value of the next pass is preset according to the roll gap deviation before casting.

[0087] S6, after the next pass of the Steckel mill bites the steel, the above process is repeated until the last pass of the Steckel mill is completed, and the roll gap deviation is preset again according to the predicted rolling force.

[0088] Next, the control method for automatically correcting the roll gap deviation during the rolling process of the Steckel mill of the present invention is applied to the Steckel mill of the Steckel rolling line, and the implementation process of the control method for automatically correcting the roll gap deviation during the rolling process of the Steckel mill of the present invention is further described. Specifically, in this application scenario, the method of the present invention is operated according to the following steps:

[0089] (1) According to the predicted rolling force of the strip head of the current pass of 2550 tons, the corresponding rolling mill transmission side stiffness is 315 tons / mm, the operating side stiffness is 324 tons / mm, the current rolling mill real-time average roll gap is 12 mm, the zero adjustment rolling force is 1000 tons, and the transmission side and operating side outlet thickness compensation values ​​are both 0. The strip head transmission side outlet thickness is calculated to be 14.46 mm, and the strip head operating side outlet thickness is 14.391 mm.

[0090] (2) Assuming that the current plasticity of the rolled piece is 500 ton / mm, the thickness difference calculation roll gap gain coefficient is 1.2, the rolled piece plasticity correction coefficient is 0.7, and the roll gap deviation pre-control amount when the current stand head is threaded is calculated to be -0.391 mm;

[0091] (3) After the current pass of the Steckel mill bites the steel, a certain number of rolling force deviations are sampled and processed before being locked. Assuming that 200 sampled data are collected, the calculated rolling force deviation locking value is 30 tons;

[0092] (4) According to the actual rolling force deviation change, the roll gap deviation on both sides is corrected in real time. Assuming that the actual rolling force deviation sampled at time t1 is 50 tons, the controller execution cycle is 4ms, the integration time is 500ms, and the rolling force deviation dead zone is set to 10 tons, then the roll gap deviation correction amount calculation formula is combined with the rolling force deviation dead zone, and the roll gap deviation calculation amount is 0.08mm; assuming that the actual rolling force deviation sampled at time t2 is 45ton, the roll gap deviation calculation amount is 0.04mm, and so on, until the current rolling pass is completed;

[0093] (5) After the current pass of the Steckel mill is finished, the pre-control value of the roll gap deviation of the next pass is preset according to the roll gap deviation before the steel is finished;

[0094] (6) After the next pass of the Steckel mill bites the steel, the above process is repeated until the last pass of the Steckel mill is completed, and the roll gap deviation is preset again according to the predicted rolling force.

[0095] In summary, this embodiment provides a control method for automatically correcting the roll gap deviation during the rolling process of a Steckel mill, which calculates the outlet thickness of the strip head on both sides according to the predicted rolling force of the strip head in the current pass and the stiffness of the mill on both sides corresponding to the predicted rolling force; calculates the pre-control value of the roll gap deviation before threading the strip according to the outlet thickness of the strip head on both sides, the stiffness on both sides corresponding to the predicted rolling force, and the plasticity of the rolled piece head; after the Steckel mill bites the steel, a certain number of rolling force deviations are sampled, processed, and then locked; the roll gap deviations on both sides are corrected in real time according to the actual rolling force deviation changes; after the Steckel mill throws the steel in the current pass, the pre-control value of the roll gap deviation in the next pass is preset according to the roll gap deviation before throwing the steel; after the Steckel mill bites the steel in the next pass, the above process is repeated until the last pass of the Steckel mill is completed, and the roll gap deviation is preset again according to the predicted rolling force. Therefore, the roll gap deviation during the strip rolling process is corrected in real time through the rolling parameters of each pass of the Steckel mill, measured data, equipment characteristics, etc., which solves problems such as strip deviation during threading and rolling, and has positive significance for improving the stability of strip threading and rolling.

[0096] Second embodiment

[0097] This embodiment provides an electronic device, such as Figure 3 As shown, the electronic device includes: a processor and a memory; wherein the processor and the memory can be connected via a communication bus; the memory stores at least one instruction, which is loaded and executed by the processor to implement the method of the first embodiment described above. In addition, the electronic device may also include a transceiver; the processor and the transceiver can be connected via a communication bus, and the transceiver is used to communicate with other devices.

[0098] Next, combine Figure 3 The following is a detailed introduction to the various components of the electronic equipment:

[0099] Among them, the processor is the control center of the electronic device, and the electronic device may include multiple processors, each of which may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor here can be a processor or a general term for multiple processing elements. For example, the processor is one or more central processing units (CPUs), or other general-purpose processors, application specific integrated circuits (ASICs), or one or more integrated circuits configured to implement an embodiment of the present invention, such as one or more microprocessors (digital signal processors, DSPs), or one or more field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor can perform various functions of the electronic device by running or executing software programs stored in the memory and calling data stored in the memory.

[0100] In a specific implementation, as an embodiment, the processor may include one or more CPUs, such as Figure 3 The CPU0 and CPU1 shown in FIG are, of course, only exemplary.

[0101] The memory is used to store the software program for executing the solution of the present invention, and the execution is controlled by the processor. The specific implementation method can refer to the above method embodiment and will not be repeated here.

[0102] Optionally, the memory may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory may be integrated with the processor or exist independently and accessed through the interface circuit ( Figure 3 (not shown) is coupled to the processor, which is not specifically limited in this embodiment of the present invention.

[0103] The transceiver may include a receiver and a transmitter ( Figure 3 The receiver is used to implement the receiving function, and the transmitter is used to implement the sending function. The transceiver can be integrated with the processor or exist independently and communicate with the electronic device through the interface circuit ( Figure 3 (not shown) is coupled to the processor, which is not specifically limited in this embodiment of the present invention.

[0104] In addition, it should be noted that Figure 3 The structure of the electronic device shown in the figure does not constitute a limitation on the device. The actual device may include more or fewer components than shown, or may combine certain components, or arrange the components differently. In addition, the technical effects achieved by the electronic device when executing the method of the first embodiment can refer to the technical effects described in the first embodiment above, and therefore will not be repeated here.

[0105] Third embodiment

[0106] This embodiment provides a computer-readable storage medium storing at least one instruction, which is loaded and executed by a processor to implement the method of the first embodiment described above. The computer-readable storage medium may be a ROM, random access memory, CD-ROM, magnetic tape, floppy disk, or optical data storage device. The instructions stored therein can be loaded by a processor in a terminal to execute the method described above.

[0107] Furthermore, it should be noted that the present invention may be provided as a method, apparatus, or computer program product. Therefore, embodiments of the present invention may take the form of a fully or partially hardware embodiment, a fully or partially software embodiment, or an embodiment combining software and hardware aspects. Furthermore, when implemented using software, embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with the embodiments of the present invention are fully or partially generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired connection (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium accessible by a computer or a data storage device such as a server or data center that contains a collection of one or more available media. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium. The semiconductor medium may be a solid state drive.

[0108] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the process in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0109] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, so that a series of operation steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for implementing the process in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0110] It should also be noted that, in this document, relational terms such as first and second are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. The terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or terminal device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. Without further limitation, an element defined by the phrase "comprising a..." does not preclude the presence of other identical elements in the process, method, article, or terminal device comprising the element. In addition, the term "and / or" is merely a description of an associative relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: the presence of A alone, the presence of A and B simultaneously, or the presence of B alone, where A and B can be singular or plural. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" relationship, but it may also indicate an "and / or" relationship. Please refer to the context for specific understanding. "At least one" means one or more, and "more" means two or more. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0111] In addition, it can be understood that in various embodiments of the present invention, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0112] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0113] In the several embodiments provided herein, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of functional modules / units is merely a logical functional division. In actual implementation, other division methods may be used, such as multiple units or components being combined or integrated into another device, or some features being ignored or not implemented. Furthermore, the coupling or direct coupling or communication connection shown or discussed between each other may be through some interface, indirect coupling or communication connection between devices or units, and may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of the present embodiment according to actual needs. In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0114] If the method is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0115] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. It should be noted that, although preferred embodiments of the present invention have been described, those skilled in the art, once understanding the basic inventive concepts of the present invention, may make various improvements and modifications without departing from the principles of the present invention. Such improvements and modifications should also be considered within the scope of protection of the present invention. Therefore, the appended claims are intended to be interpreted as covering the preferred embodiments and all variations and modifications that fall within the scope of the embodiments of the present invention.

Claims

1. A control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill, characterized in that: include: Calculate the exit thickness on both sides of the strip head based on the predicted rolling force of the strip head in the current pass and the stiffness on both sides of the rolling mill corresponding to the predicted rolling force; Calculate the deviation pre-control value before the strip is passed through the roll gap head according to the exit thickness on both sides of the strip head, the predicted rolling force corresponding to the stiffness on both sides, and the plasticity of the rolled piece head; After the Steckel mill bites the steel, a certain number of rolling force deviations are sampled and processed before being locked; Correct the roll gap deviation on both sides in real time according to the actual rolling force deviation change; After the current pass of the Steckel mill is finished, the roll gap deviation pre-control value of the next pass is preset according to the roll gap deviation before the steel is finished; After the next pass of the Steckel mill bites the steel, the above process is repeated until the last pass of the Steckel mill is completed, and the roll gap deviation is preset again according to the predicted rolling force.

2. The control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill according to claim 1, characterized in that: The calculation of the exit thickness on both sides of the strip head includes: Calculate the exit thickness of both sides of the strip head based on the predicted rolling force of the strip head in the current pass, the stiffness of both sides of the rolling mill corresponding to the predicted rolling force, the real-time average roll gap of the stand in the current pass, the zero-adjustment rolling force in the current pass, and the exit thickness compensation value of both sides of the strip head in the current pass; According to the calculated exit thickness on both sides of the strip head of the current pass, the stiffness on both sides of the rolling mill corresponding to the predicted rolling force, and the plasticity of the rolled piece head, the pre-control value of the roll gap deviation before the strip head of the current pass is calculated.

3. The control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill according to claim 2, characterized in that: The calculation formula for the exit thickness of the strip head on both sides of the current pass is: Among them, h dr(i) h represents the thickness of the strip at the transmission side of the head at the i-th pass; op(i) represents the thickness of the strip head at the operating side of the i-th pass; S(i) represents the real-time average roll gap of the i-th pass; P s(i) represents the predicted rolling force of the strip head in the i-th pass; P0 represents the current stand zero adjustment rolling force; M dr(i) M represents the rolling mill transmission side stiffness corresponding to the predicted rolling force of the strip head at the i-th pass; op(i) represents the rolling mill operating side stiffness corresponding to the predicted rolling force of the strip head at the i-th pass; dr(i) It indicates the thickness compensation value of the strip head transmission side outlet of the i-th pass, and its value range is 0~0.

5. op(i) It indicates the thickness compensation value at the exit of the strip head operating side of the i-th pass, and its value range is 0 to 0.

5.

4. The control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill according to claim 2, characterized in that: The calculation formula for the pre-control value of the roller gap deviation before the belt is threaded at the head of the current frame is: S do(i) =S o(i) -S d(i) Among them, S do(i) It indicates the pre-control value of the roll gap deviation before the strip head of the current pass passes through the strip. It is used to pre-regulate the roll gap deviation before the strip head of the current pass passes through the strip. During pre-regulation, the transmission side roll gap is given plus S do(i) , the operating side roller gap setting minus S do(i) ;S o(i) Indicates the pre-adjustment of the roll gap on the operating side of the strip head in the current pass; S d(i) Indicates the pre-adjustment of the roll gap on the driving side of the strip head in the current pass; h dr(i) Indicates the current pass strip head transmission side exit thickness; h op(i) Indicates the thickness of the strip head at the operating side of the current pass; M dr(i) Indicates the rolling force of the strip head at the current pass, which is predicted by the rolling mill drive side stiffness; M op(i) Indicates the mill operating side stiffness corresponding to the predicted rolling force of the strip head in the current pass; K (i) Indicates the plasticity of the head of the rolled piece in the current rolling pass; G m(i) It represents the gain coefficient of the roll gap adjustment, and its value range is 0.2~1.5; S f(i) It represents the plasticity correction coefficient of the rolled piece, and its value range is 0.1 to 1.

5. The control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill according to claim 1, characterized in that: After the Steckel mill bites the steel, a certain number of rolling force deviations are sampled and processed before being locked, including: After the current pass of the Steckel mill bites the steel, a certain number of rolling force deviations are sampled and locked after processing. If there is manual intervention in the roll gap deviation within the planned certain number, the same number of data will be resampled and locked after the manual intervention.

6. The control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill according to claim 5, characterized in that: The locking formula for sampling a certain number of actual rolling force deviations is: Among them, F devl It indicates the locked value of the actual rolling force deviation of the rolling mill after a certain number of samples are taken in the current pass, where the rolling force deviation is defined as the operating side pressure minus the transmission side pressure; n indicates the number of samples, which is given by experience and ranges from 100 to 1000; m indicates the number of real-time samples; F dev Indicates the actual rolling force deviation of the rolling mill in the current pass.

7. The control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill according to claim 1, characterized in that: The real-time correction of the roll gap deviation on both sides according to the actual rolling force deviation change includes: According to the rolling force deviation variation during the current pass of the Steckel mill, the roll gap deviation correction is calculated and compensated to the given roll gap deviation.

8. The control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill according to claim 7, characterized in that: The calculation formula for the roll gap deviation correction amount is: Among them, G od It indicates the roll gap deviation correction amount calculated according to the actual rolling force deviation change during the current pass of the Steckel mill; TA indicates the execution cycle when the controller calculates the roll gap deviation according to the rolling force deviation. This value is given by experience and ranges from 2 to 16; TI indicates the integration time when the controller calculates the roll gap deviation according to the rolling force deviation. This value is given by experience and ranges from 50 to 500; F dev(i) Indicates the real-time rolling force deviation of the i-th pass; F devl(i) Indicates the rolling force deviation locking value at the head of the i-th pass.

9. The control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill according to claim 7, characterized in that: The calculation of the roll gap deviation correction amount according to the rolling force deviation variation during the current pass of the Steckel mill includes: Set rolling force deviation dead zone F de In order to avoid frequent correction of roll gap deviation, the roll gap deviation correction amount is calculated by combining the rolling force deviation dead zone with the following formula: Among them, F de Indicates the rolling force deviation dead zone used when calculating the roll gap deviation correction amount according to the actual rolling force deviation change during the current pass of the Steckel mill. This value is given based on experience and ranges from 5 to 20.

10. The control method for automatically correcting roll gap deviation during the rolling process of a Steckel mill according to claim 7, characterized in that: The calculation of the roll gap deviation correction amount according to the rolling force deviation variation during the current pass of the Steckel mill and the compensation to the roll gap deviation setting includes: If there is manual intervention, the rolling force deviation is sampled and locked again after the manual intervention, and the rolling force deviation target value is updated.

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