Control method and device of strip steel casting and rolling system and readable storage medium

Abstract

The invention discloses a control method and device of a strip steel cast-rolling system and a readable storage medium, and relates to the technical field of steel machining, and the control method of the strip steel cast-rolling system comprises the steps that before a rolling mill rolls strip steel, the first torque of a pinch roll is obtained; in the process that the rolling mill rolls the strip steel, the torque of the pinch roll is detected, and second torque is obtained; determining a first tension value of the strip steel according to the first torque and the second torque; determining a speed compensation value corresponding to the rolling mill according to the first tension value; and adjusting the strip steel rolling speed of the rolling mill according to the speed compensation value. Zero tension of the strip steel in the rolling process is guaranteed, and then the production stability of a strip steel cast-rolling system is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of steel processing, and in particular to a control method, device and readable storage medium for a strip steel casting and rolling system. Background Art

[0002] At present, in the strip casting and rolling system, the casting machine and the rolling mill are hard-connected, and the ingots at the outlet of the continuous casting machine directly enter the rolling mill for rolling. If the speed matching and tension control between the casting machine and the rolling mill are unreasonable, accidents such as steel piling or narrowing may occur. However, the control method of the existing strip casting and rolling system has technical problems such as poor production stability and high accident rate. Summary of the invention

[0003] The embodiments of the present application provide a control method, device and readable storage medium for a strip steel casting and rolling system, which are used to solve technical problems in the prior art such as poor production stability and high accident rate of the strip steel casting and rolling system.

[0004] In a first aspect of an embodiment of the present application, a control method for a strip steel casting and rolling system is provided, wherein the strip steel casting and rolling system comprises a continuous casting machine, a pinch roller and a rolling mill, wherein the pinch roller is used to transfer the strip steel produced by the continuous casting machine to the rolling mill, and the method comprises:

[0005] Before the rolling mill rolls the steel strip, a first torque of the pinch roll is obtained;

[0006] During the rolling process of the rolling mill on the strip steel, the torque of the pinch roll is detected to obtain a second torque;

[0007] Determining a first tension value of the strip according to the first torque and the second torque;

[0008] Determining a speed compensation value corresponding to the rolling mill according to the first tension value;

[0009] According to the speed compensation value, the speed of the rolling mill rolling the strip is adjusted.

[0010] The control method of the strip casting and rolling system in this embodiment determines the first tension value of the strip according to the first torque and the second torque, determines the speed compensation value corresponding to the rolling mill according to the first tension value, and adjusts the speed of the rolling mill for rolling the strip according to the speed compensation value, thereby eliminating the tension of the strip between the continuous casting machine and the rolling mill, avoiding accidents such as steel piling or narrowing in the strip casting and rolling system, improving the production stability of the strip casting and rolling system, and at the same time improving the production efficiency of the strip casting and rolling system.

[0011] In a second aspect of the embodiment of the present application, a control device for a strip steel casting and rolling system is provided. The strip steel casting and rolling system includes a continuous casting machine, a pinch roller and a rolling mill. The pinch roller is used to transfer the strip steel produced by the continuous casting machine to the rolling mill. The device includes:

[0012] An acquisition unit, used for acquiring a first torque of the pinch roll before the rolling mill rolls the strip;

[0013] The acquisition unit is also used to detect the torque of the pinch roller during the rolling process of the rolling mill on the strip steel to obtain the second torque;

[0014] A processing unit, configured to determine a first tension value of the strip according to the first torque and the second torque;

[0015] The processing unit is further used to determine a speed compensation value corresponding to the rolling mill according to the first tension value;

[0016] The control unit is used for adjusting the speed of the rolling mill for rolling the strip according to the speed compensation value.

[0017] The control device of the strip casting and rolling system in this embodiment determines the first tension value of the strip according to the first torque and the second torque, determines the speed compensation value corresponding to the rolling mill according to the first tension value, and adjusts the speed of the rolling mill for rolling the strip according to the speed compensation value, thereby eliminating the tension of the strip between the continuous casting machine and the rolling mill, avoiding accidents such as steel piling or narrowing in the strip casting and rolling system, improving the production stability of the strip casting and rolling system, and at the same time improving the production efficiency of the strip casting and rolling system.

[0018] In a third aspect of the embodiments of the present application, another control device for a strip steel casting and rolling system is provided, comprising a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the steps of the control method for the strip steel casting and rolling system in any of the above embodiments are implemented. Therefore, the control device for the strip steel casting and rolling system has all the beneficial effects of the control method for the strip steel casting and rolling system in any of the above embodiments, which will not be described in detail here.

[0019] In a fourth aspect of the embodiments of the present application, a readable storage medium is provided, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of the control method of the strip steel casting and rolling system in any of the above embodiments are implemented. Therefore, the readable storage medium has all the beneficial effects of the control method of the strip steel casting and rolling system in any of the above embodiments, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 A flow chart of a control method for a strip steel casting and rolling system provided in an embodiment of the present application;

[0022] Figure 2 A functional module block diagram of a control device for a strip steel casting and rolling system provided in an embodiment of the present application;

[0023] Figure 3 One of the schematic diagrams of the control device of the strip steel casting and rolling system provided in the embodiment of the present application;

[0024] Figure 4 A second schematic diagram of a control device for a strip steel casting and rolling system provided in an embodiment of the present application;

[0025] Figure 5 A third schematic diagram of a control device for a strip steel casting and rolling system provided in an embodiment of the present application;

[0026] Figure 6 This is a structural block diagram of the control device of the strip casting and rolling system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0028] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0029] In some embodiments, Figure 1 A flow chart of a control method for a strip steel casting and rolling system provided in an embodiment of the present application, such as Figure 1 As shown, a control method for a strip steel casting and rolling system is proposed, comprising:

[0030] Step S101, before the rolling mill rolls the strip, obtaining a first torque of the pinch roll;

[0031] Step S102, during the rolling process of the rolling mill on the strip steel, detecting the torque of the pinch roll to obtain a second torque;

[0032] Step S103, determining a first tension value of the strip according to the first torque and the second torque;

[0033] Step S104, determining a speed compensation value corresponding to the rolling mill according to the first tension value;

[0034] Step S105, adjusting the speed of the rolling mill for rolling the strip according to the speed compensation value.

[0035] In this embodiment, the strip casting and rolling system is an equipment system that can forge and roll strip steel, wherein the strip casting and rolling system includes a continuous casting machine, pinch rolls and a rolling mill. The continuous casting machine is a machine that continuously casts high-temperature molten steel into ingots with a certain cross-sectional shape and certain size specifications. The pinch rolls are equipment used to transfer the strip steel produced by the continuous casting machine to the rolling mill. The rolling mill is equipment that realizes the metal rolling process.

[0036] Exemplarily, the strip casting and rolling system may be a thin slab strip casting and rolling system.

[0037] Before the rolling mill rolls the steel strip, a first torque of the pinch roll is acquired, wherein the first torque is a motor torque when the continuous casting machine is not performing a rolling process.

[0038] Exemplarily, the continuous casting machine includes a motor, and the first torque is the torque of the motor when the continuous casting machine is idling.

[0039] During the rolling process of the steel strip by the rolling mill, the torque of the pinch roll is detected to obtain a second torque, wherein the second torque is the motor torque of the pinch roll during the process of transmitting the steel strip produced by the continuous casting machine to the rolling mill.

[0040] Exemplarily, the pinch rolls include a motor, and the second torque is the torque of the motor in the pinch rolls during the process of the pinch rolls transferring the steel strip produced by the continuous casting machine to the rolling mill.

[0041] The first torque and the second torque are processed to determine a first tension value of the steel strip, wherein the first tension value represents the force of the steel strip when the pinch roller transfers the steel strip produced by the continuous casting machine to the rolling mill.

[0042] Exemplarily, the first torque may be the no-load torque of the pinch roller, and the second torque may be the load torque of the pinch roller.

[0043] Exemplarily, the rolling mill may be a H0 rolling mill.

[0044] For example, the first tension value can reflect the speed matching between the continuous casting machine and the rolling mill. If the first tension value is large, it means that the speeds between the continuous casting machine and the rolling mill are not matched, and the rolling speed of the rolling mill needs to be adjusted.

[0045] According to the first tension value, a speed compensation value corresponding to the rolling mill is determined, and according to the speed compensation value, the speed at which the rolling mill rolls the strip is adjusted, wherein the speed compensation value is a speed adjustment value of the rolling mill.

[0046] Exemplarily, the speed compensation value may be a positive value, and the speed at which the rolling mill rolls the strip is increased according to the speed compensation value.

[0047] Exemplarily, the speed compensation value may be a negative value, and the speed at which the rolling mill rolls the strip is reduced according to the speed compensation value.

[0048] It should be noted that, according to the speed compensation value, the speed of the rolling mill rolling the strip is adjusted to match the speeds of the continuous casting machine and the rolling mill, thereby eliminating the tension of the strip between the continuous casting machine and the rolling mill, avoiding accidents such as steel piling or narrowing in the strip casting and rolling system, improving the production stability of the strip casting and rolling system, and at the same time improving the production efficiency of the strip casting and rolling system.

[0049] The control method of the strip casting and rolling system in this embodiment determines the first tension value of the strip according to the first torque and the second torque, determines the speed compensation value corresponding to the rolling mill according to the first tension value, and adjusts the speed of the rolling mill for rolling the strip according to the speed compensation value, thereby eliminating the tension of the strip between the continuous casting machine and the rolling mill, avoiding accidents such as steel piling or narrowing in the strip casting and rolling system, improving the production stability of the strip casting and rolling system, and at the same time improving the production efficiency of the strip casting and rolling system.

[0050] In some embodiments, a control method for a strip steel casting and rolling system is provided, and a first tension value of the strip steel is determined according to a first torque and a second torque, comprising:

[0051] Step S201, obtaining cross-sectional area data of the steel strip and obtaining dimension data of the pinch roller;

[0052] Step S202, determining a first tension value of the steel strip according to the size data, the cross-sectional area data, the first torque and the second torque.

[0053] In this embodiment, during the rolling process of the steel strip by the rolling mill, cross-sectional area data of the steel strip and dimension data of the pinch roll are obtained, wherein the cross-sectional area data represents the cross-sectional area dimension of the steel strip and the dimension data represents the included dimension.

[0054] Exemplarily, the cross-sectional area data includes a cross-sectional area value of the steel strip.

[0055] Exemplarily, the dimension data include diameter data of the pinch rollers.

[0056] The dimension data, the cross-sectional area data, the first torque and the second torque are processed to obtain a first tension value of the steel strip.

[0057] Exemplarily, the calculation formula of the first tension value is:

[0058]

[0059] Among them, T M is the first tension value, i.e. the actual unit tension between the casting machine and the rolling mill, G PRM0 is the first torque, i.e. the torque of the pinch roll before the mill is loaded, G PRM is the second torque, i.e. the feedback value of the average torque of the pinch roller, A M0 is the cross-sectional area value, that is, the cross-sectional area of ​​the strip between the casting machine and the continuous casting machine, D PR It is the dimension data, namely the diameter of the pinch roller.

[0060] The control method of the strip casting and rolling system in this embodiment obtains the first tension value of the strip by processing the dimensional data, cross-sectional area data, the first torque and the second torque, thereby ensuring the data accuracy of the first tension value and further ensuring the accuracy of the speed compensation value.

[0061] In some embodiments, a control method for a strip steel casting and rolling system is proposed, and a speed compensation value corresponding to a rolling mill is determined according to a first tension value, comprising:

[0062] Step S301, obtaining a preset tension target value, and obtaining a preset proportional gain, integral gain and total gain;

[0063] Step S302, determining a speed compensation value according to the tension target value, the first tension value, the proportional gain, the integral gain and the total gain.

[0064] In this embodiment, a preset tension target value is obtained, and preset proportional gain, integral gain and total gain are obtained, wherein the tension target value is a tension threshold, and the proportional gain, integral gain and total gain are parameters in the controller.

[0065] Exemplarily, the tension target value may be specifically 0.

[0066] Exemplarily, the speed of the rolling mill is controlled by a linear controller, wherein the proportional gain, the integral gain and the total gain may be parameters of the linear controller.

[0067] Data processing is performed on the tension target value, the first tension value, the proportional gain, the integral gain and the total gain to determine the speed compensation value.

[0068] Exemplarily, the speed compensation value is calculated as follows:

[0069]

[0070] Among them, V FTC is the speed compensation value, T M is the first tension value, T MREF is the tension target value, that is, the unit tension target value, KP is the proportional gain, K is the integral gain, G TFTC is the total gain and S is the coefficient.

[0071] The control method of the strip casting and rolling system in this embodiment determines the speed compensation value by performing data processing on the tension target value, the first tension value, the proportional gain, the integral gain and the total gain, thereby ensuring the data accuracy of the speed compensation value. Based on the speed compensation value, the speed of the strip rolling by the rolling mill is accurately adjusted, thereby eliminating the tension of the strip between the continuous casting machine and the rolling mill.

[0072] In some embodiments, a control method for a strip steel casting and rolling system is provided. After determining a first tension value of the strip steel according to the first torque and the second torque, the method further comprises:

[0073] Step S401, obtaining a preset tension target value;

[0074] Step S402, when the first tension value is greater than the tension target value, reducing the speed of the rolling mill rolling the strip;

[0075] Step S403, after reducing the speed of the rolling mill rolling the steel strip, determining a second tension value of the steel strip;

[0076] Step S404, when the first tension value is equal to the tension target value, the speed of the rolling mill rolling the strip is kept unchanged.

[0077] In this embodiment, a preset tension target value is obtained, and when the first tension value is greater than the tension target value, the speed at which the rolling mill rolls the strip is reduced, wherein the tension target value is a preset tension threshold value.

[0078] Exemplarily, the tension target value may be 0. When the first tension value is greater than the tension target value, it indicates that a strip narrowing accident may occur between the rolling mill and the continuous casting machine, and the speed at which the rolling mill rolls the strip needs to be lowered.

[0079] After the speed at which the rolling mill rolls the steel strip is reduced, the tension of the steel strip is re-determined to obtain a second tension value, wherein the second tension value is the tension value of the steel strip after the speed at which the rolling mill rolls the steel strip is reduced.

[0080] When the first tension value is equal to the target tension value, it indicates that the speeds of the rolling mill and the continuous casting machine are matched, thereby maintaining the speed at which the rolling mill rolls the strip unchanged.

[0081] For example, when the first tension value is equal to the target tension value, it indicates that the speeds of the rolling mill and the continuous casting machine match, and the strip narrowing accident will not occur.

[0082] The control method of the strip casting and rolling system in this embodiment reduces the speed at which the strip is rolled by the rolling mill when the first tension value is greater than the tension target value, thereby ensuring that no strip narrowing accidents occur between the rolling mill and the continuous casting machine, thereby improving the operating safety of the strip casting and rolling system.

[0083] In some embodiments, a control method for a strip steel casting and rolling system is provided. After determining a first tension value of the strip steel according to the first torque and the second torque, the method further comprises:

[0084] Step S501, obtaining a preset tension target value;

[0085] Step S502, when the first tension value is less than the tension target value, increasing the speed of the rolling mill for rolling the strip;

[0086] Step S503, after increasing the speed of the rolling mill rolling the steel strip, determining a third tension value of the steel strip;

[0087] Step S504: when the third tension value is equal to the target tension value, the speed at which the rolling mill rolls the strip is kept unchanged.

[0088] In this embodiment, a preset tension target value is obtained, and when the first tension value is less than the tension target value, the speed at which the rolling mill rolls the strip is increased, wherein the tension target value is a preset tension threshold value.

[0089] Exemplarily, the tension target value may be 0. When the first tension value is less than the tension target value, it indicates that a steel pile accident will occur between the rolling mill and the continuous casting machine, and the speed of the rolling mill for rolling the strip steel needs to be increased.

[0090] After the speed at which the rolling mill rolls the steel strip is increased, the tension of the steel strip is re-determined to obtain a third tension value, wherein the third tension value is the tension value of the steel strip after the speed at which the rolling mill rolls the steel strip is increased.

[0091] When the first tension value is equal to the target tension value, it indicates that the speeds of the rolling mill and the continuous casting machine are matched, thereby maintaining the speed at which the rolling mill rolls the strip unchanged.

[0092] Exemplarily, when the first tension value is equal to the target tension value, it indicates that the speeds of the rolling mill and the continuous casting machine match, and a steel pile accident will not occur.

[0093] The control method of the strip casting and rolling system in this embodiment increases the speed of the rolling mill rolling the strip when the first tension value is less than the tension target value, thereby ensuring that no steel pile accident occurs between the rolling mill and the continuous casting machine, thereby improving the operating safety of the strip casting and rolling system.

[0094] In some embodiments, a control method for a strip steel casting and rolling system is provided. After determining a first tension value of the strip steel according to the first torque and the second torque, the method further comprises:

[0095] Step S601, obtaining a preset tension target value;

[0096] Step S602, when the first tension value is equal to the tension target value, the speed of the rolling mill rolling the strip is kept unchanged.

[0097] In this embodiment, a preset tension target value is obtained. When the first tension value is equal to the tension target value, it indicates that the speeds of the rolling mill and the continuous casting machine are matched, and the speed of the rolling mill rolling the strip is kept unchanged, wherein the tension target value is a preset tension threshold.

[0098] Exemplarily, when the first tension value is equal to the target tension value, it indicates that the speeds of the rolling mill and the continuous casting machine match, and no accidents such as steel piling or narrowing will occur between the rolling mill and the continuous casting machine.

[0099] The control method of the strip casting and rolling system in this embodiment, when the first tension value is equal to the tension target value, indicates that the speeds of the rolling mill and the continuous casting machine are matched, and the speed of the rolling mill rolling the strip is kept unchanged, thereby improving the production efficiency of the strip casting and rolling system.

[0100] In some embodiments, a control method for a strip steel casting and rolling system is provided, which, after adjusting the speed of the rolling mill rolling the strip steel according to the speed compensation value, further comprises:

[0101] Step S701, obtaining a preset tension target value;

[0102] Step S702, determining a fourth tension value of the strip between the continuous casting machine and the rolling mill;

[0103] Step S703, when the fourth tension value is not equal to the tension target value, obtaining an updated speed compensation value according to the fourth tension value;

[0104] Step S704, readjusting the speed of the rolling mill for rolling the strip according to the updated speed compensation value.

[0105] In this embodiment, a preset tension target value is obtained, and at the same time, after adjusting the speed at which the rolling mill rolls the strip according to the speed compensation value, the tension of the strip between the continuous casting machine and the rolling mill is re-determined to obtain a fourth tension value, wherein the fourth tension value is the tension value of the strip after adjusting the speed at which the rolling mill rolls the strip.

[0106] When the fourth tension value is not equal to the tension target value, it indicates that the speeds of the rolling mill and the continuous casting machine do not match, and an updated speed compensation value is obtained according to the fourth tension value.

[0107] According to the updated speed compensation value, the speed at which the rolling mill rolls the strip is readjusted to match the speeds of the rolling mill and the continuous caster.

[0108] The control method of the strip casting and rolling system in this embodiment, when the fourth tension value is not equal to the tension target value, indicates that the speeds of the rolling mill and the continuous casting machine do not match. According to the fourth tension value, an updated speed compensation value is obtained. According to the updated speed compensation value, the speed of the rolling mill rolling the strip is readjusted to match the speeds of the rolling mill and the continuous casting machine, thereby improving the production stability of the strip casting and rolling system.

[0109] In some embodiments, Figure 2 The functional module block diagram of the control device of the strip steel casting and rolling system provided in the embodiment of the present application is as follows: Figure 2 As shown, in an embodiment of the present application, a control device 800 of a strip steel casting and rolling system is provided, comprising:

[0110] An acquisition unit 802 is used to acquire a first torque of a pinch roll before the rolling mill rolls the steel strip;

[0111] The acquisition unit 802 is further used to detect the torque of the pinch roller during the rolling process of the rolling mill on the strip steel to obtain the second torque;

[0112] A processing unit 804 is used to determine a first tension value of the strip according to the first torque and the second torque;

[0113] The processing unit 804 is further used to determine a speed compensation value corresponding to the rolling mill according to the first tension value;

[0114] The control unit 806 is used to adjust the speed of the rolling mill for rolling the strip according to the speed compensation value.

[0115] In this embodiment, the strip casting and rolling system is an equipment system that can forge and roll strip steel, wherein the strip casting and rolling system includes a continuous casting machine, pinch rolls and a rolling mill. The continuous casting machine is a machine that continuously casts high-temperature molten steel into ingots with a certain cross-sectional shape and certain size specifications. The pinch rolls are equipment used to transfer the strip steel produced by the continuous casting machine to the rolling mill. The rolling mill is equipment that realizes the metal rolling process.

[0116] Exemplarily, the strip casting and rolling system may be a thin slab strip casting and rolling system.

[0117] Before the rolling mill rolls the steel strip, a first torque of the pinch roll is acquired, wherein the first torque is a motor torque when the continuous casting machine is not performing a rolling process.

[0118] Exemplarily, the continuous casting machine includes a motor, and the first torque is the torque of the motor when the continuous casting machine is idling.

[0119] During the rolling process of the steel strip by the rolling mill, the torque of the pinch roll is detected to obtain a second torque, wherein the second torque is the motor torque of the pinch roll during the process of transmitting the steel strip produced by the continuous casting machine to the rolling mill.

[0120] Exemplarily, the pinch rolls include a motor, and the second torque is the torque of the motor in the pinch rolls during the process of the pinch rolls transferring the steel strip produced by the continuous casting machine to the rolling mill.

[0121] The first torque and the second torque are processed to determine a first tension value of the steel strip, wherein the first tension value represents the force of the steel strip when the pinch roller transfers the steel strip produced by the continuous casting machine to the rolling mill.

[0122] For example, the first tension value can reflect the speed matching between the continuous casting machine and the rolling mill. If the first tension value is large, it means that the speeds between the continuous casting machine and the rolling mill are not matched, and the rolling speed of the rolling mill needs to be adjusted.

[0123] According to the first tension value, a speed compensation value corresponding to the rolling mill is determined, and according to the speed compensation value, the speed at which the rolling mill rolls the strip is adjusted, wherein the speed compensation value is a speed adjustment value of the rolling mill.

[0124] Exemplarily, the speed compensation value may be a positive value, and the speed at which the rolling mill rolls the strip is increased according to the speed compensation value.

[0125] Exemplarily, the speed compensation value may be a negative value, and the speed at which the rolling mill rolls the strip is reduced according to the speed compensation value.

[0126] It should be noted that, according to the speed compensation value, the speed of the rolling mill rolling the strip is adjusted to match the speeds of the continuous casting machine and the rolling mill, thereby eliminating the tension of the strip between the continuous casting machine and the rolling mill, avoiding accidents such as steel piling or narrowing in the strip casting and rolling system, improving the production stability of the strip casting and rolling system, and at the same time improving the production efficiency of the strip casting and rolling system.

[0127] For example, Figure 3 One of the schematic diagrams of the control device of the strip steel casting and rolling system provided in the embodiment of the present application is as follows Figure 3 As shown, when the tension between the casting machine and the rolling mill is equal to 0, the second flow rate at the casting machine is considered to be equal to the second flow rate at the rolling mill.

[0128] When the average torque of the pinch roll is greater than the target value, it means that the strip speed at the pinch roll is slower than the speed of the pinch roll. In this case, the speed of the rolling mill should be increased to reduce the average torque of the casting machine and make the tension between the casting machine and the rolling mill 0.

[0129] When the average torque of the pinch roll is less than the target value, the speed of the rolling mill is reduced.

[0130] For example, Figure 4 The second schematic diagram of the control device of the strip steel casting and rolling system provided in the embodiment of the present application is as follows: Figure 4 As shown in the figure, the average torque of the caster is calculated by the average torque of the active pinch rolls in the fan-shaped segment. The speed of the active pinch rolls in the fan-shaped segment is anchored by the target pulling speed, and the feedback value of the actual pulling speed is provided by the average speed of the active pinch rolls in the fan-shaped segment. In this way, the active pinch rolls have two related control loops: the speed loop realized by adjusting their own motor current and the torque loop realized by adjusting the rolling mill speed.

[0131] For example, Figure 5 The third schematic diagram of the control device of the strip steel casting and rolling system provided in the embodiment of the present application is as follows Figure 5 As shown in the figure, when the billet speed at the pinch roller of the casting machine decreases (actually, the casting machine pulling speed decreases), the pinch roller increases the average torque to increase the billet speed in order to keep the casting machine pulling speed stable. At this time, due to the decrease in the billet speed at the pinch roller of the casting machine, the tension between the casting machine and the rolling mill will increase. The increase in the average torque increases the speed of the rolling mill due to the torque closed loop of the pinch roller, thereby increasing the billet speed at the pinch roller of the casting machine. The increase in the rolling mill speed will increase the tension between the casting machine and the rolling mill, and then the increase in the billet speed at the pinch roller will reduce the tension between the casting machine and the rolling mill, and vice versa. In this way, the dynamic matching of the casting machine and the rolling mill speed is achieved, and the purpose of stable production is achieved.

[0132] The control device 800 of the strip casting and rolling system in this embodiment determines the first tension value of the strip according to the first torque and the second torque, determines the speed compensation value corresponding to the rolling mill according to the first tension value, and adjusts the speed of the rolling mill for rolling the strip according to the speed compensation value, thereby eliminating the tension of the strip between the continuous casting machine and the rolling mill, avoiding accidents such as steel piling or narrowing in the strip casting and rolling system, improving the production stability of the strip casting and rolling system, and at the same time improving the production efficiency of the strip casting and rolling system.

[0133] In some embodiments, a control device 800 for a strip steel casting and rolling system is provided, further comprising:

[0134] The processing unit 804 is also used to obtain the cross-sectional area data of the strip and the dimension data of the pinch roller;

[0135] The processing unit 804 is further used to determine a first tension value of the steel strip according to the size data, the cross-sectional area data, the first torque and the second torque.

[0136] In some embodiments, a control device 800 for a strip steel casting and rolling system is provided, further comprising:

[0137] The processing unit 804 is further used to obtain a preset tension target value, and obtain a preset proportional gain, integral gain and total gain;

[0138] The processing unit 804 is further configured to determine a speed compensation value according to the tension target value, the first tension value, the proportional gain, the integral gain and the total gain.

[0139] In some embodiments, a control device 800 for a strip steel casting and rolling system is provided, further comprising:

[0140] The processing unit 804 is also used to obtain a preset tension target value;

[0141] The processing unit 804 is further configured to reduce the speed at which the rolling mill rolls the strip when the first tension value is greater than the tension target value;

[0142] The processing unit 804 is further used to determine a second tension value of the steel strip after the speed of the rolling mill rolling the steel strip is reduced;

[0143] The processing unit 804 is further configured to keep the speed at which the rolling mill rolls the strip unchanged when the first tension value is equal to the target tension value.

[0144] In some embodiments, a control device 800 for a strip steel casting and rolling system is provided, further comprising:

[0145] The processing unit 804 is also used to obtain a preset tension target value;

[0146] The processing unit 804 is further configured to increase the speed at which the rolling mill rolls the strip when the first tension value is less than the tension target value;

[0147] The processing unit 804 is further used to determine a third tension value of the steel strip after increasing the speed of the rolling mill rolling the steel strip;

[0148] The processing unit 804 is further configured to keep the speed at which the rolling mill rolls the strip unchanged when the third tension value is equal to the target tension value.

[0149] In some embodiments, a control device 800 for a strip steel casting and rolling system is provided, further comprising:

[0150] The processing unit 804 is also used to obtain a preset tension target value;

[0151] The processing unit 804 is further configured to keep the speed at which the rolling mill rolls the strip unchanged when the first tension value is equal to the target tension value.

[0152] In some embodiments, a control device 800 for a strip steel casting and rolling system is provided, further comprising:

[0153] The processing unit 804 is also used to obtain a preset tension target value;

[0154] The processing unit 804 is further used to determine a fourth tension value of the strip between the continuous casting machine and the rolling mill;

[0155] The processing unit 804 is further configured to obtain an updated speed compensation value according to the fourth tension value when the fourth tension value is not equal to the tension target value;

[0156] The processing unit 804 is further used to readjust the speed of the rolling mill for rolling the strip according to the updated speed compensation value.

[0157] In some embodiments, Figure 6 The structural block diagram of the control device of the strip steel casting and rolling system provided in the embodiment of the present application is as follows: Figure 6 As shown, a control device 900 for a strip steel casting and rolling system is proposed, and the control device 900 for the strip steel casting and rolling system includes a processor 902 and a memory 904. The memory 904 stores a computer program, and when the computer program is executed by the processor 902, the steps of the control method for the strip steel casting and rolling system in any of the above embodiments are implemented. Therefore, the control device 900 for the strip steel casting and rolling system has all the beneficial effects of the control method for the strip steel casting and rolling system in any of the above embodiments, which will not be described in detail here.

[0158] In some embodiments, a readable storage medium is provided, on which a program is stored. When the program is executed by a processor, the steps of the control method of the strip casting and rolling system in any of the above embodiments are implemented, thereby having all the beneficial technical effects of the control method of the strip casting and rolling system in any of the above embodiments.

[0159] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0160] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-readable program code.

[0161] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes 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, a special-purpose computer, an embedded computer, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes 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.

[0162] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0163] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0164] An embodiment of the present application also provides a computer program product, which includes computer software instructions. When the computer software instructions are executed on a processing device, the processing device executes the process of a control method for a strip casting and rolling system.

[0165] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or a data center that includes one or more available media integration. The available medium can be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)), etc.

[0166] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0167] In the several embodiments provided in the present application, 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 only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0168] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0169] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0170] If the integrated unit 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 application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0171] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0172] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0173] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A control method for a strip steel casting and rolling system, characterized in that: The strip steel casting and rolling system comprises a continuous casting machine, a pinch roller and a rolling mill, wherein the pinch roller is used to transfer the strip steel produced by the continuous casting machine to the rolling mill, and the method comprises: Before the rolling mill rolls the steel strip, obtaining a first torque of the pinch roll; During the process of the rolling mill rolling the steel strip, the torque of the pinch roll is detected to obtain a second torque; Determining a first tension value of the strip steel according to the first torque and the second torque; Determining a speed compensation value corresponding to the rolling mill according to the first tension value; The speed at which the rolling mill rolls the steel strip is adjusted according to the speed compensation value.

2. The method according to claim 1, characterized in that: Determining a first tension value of the strip steel according to the first torque and the second torque includes: Acquiring cross-sectional area data of the steel strip and acquiring dimension data of the pinch roller; The first tension value of the steel strip is determined according to the size data, the cross-sectional area data, the first torque and the second torque.

3. The method according to claim 1, characterized in that Determining the speed compensation value corresponding to the rolling mill according to the first tension value includes: Obtain the preset tension target value, and obtain the preset proportional gain, integral gain and total gain; The speed compensation value is determined according to the tension target value, the first tension value, the proportional gain, the integral gain and the total gain.

4. The method according to claim 1, characterized in that: After determining the first tension value of the strip steel according to the first torque and the second torque, the method further includes: Get the preset tension target value; When the first tension value is greater than the tension target value, reducing the speed at which the rolling mill rolls the strip; After reducing the speed at which the rolling mill rolls the steel strip, determining a second tension value of the steel strip; When the first tension value is equal to the target tension value, the speed at which the rolling mill rolls the steel strip is kept unchanged.

5. The method according to claim 1, characterized in that After determining the first tension value of the strip steel according to the first torque and the second torque, the method further includes: Get the preset tension target value; When the first tension value is less than the tension target value, increasing the speed at which the rolling mill rolls the strip; After increasing the speed at which the rolling mill rolls the steel strip, determining a third tension value of the steel strip; When the third tension value is equal to the target tension value, the speed at which the rolling mill rolls the steel strip is kept unchanged.

6. The method according to claim 1, characterized in that After determining the first tension value of the strip steel according to the first torque and the second torque, the method further includes: Get the preset tension target value; When the first tension value is equal to the target tension value, the speed at which the rolling mill rolls the steel strip is kept unchanged.

7. The method according to any one of claims 1 to 6, characterized in that After adjusting the speed of the rolling mill for rolling the strip steel according to the speed compensation value, the method further comprises: Get the preset tension target value; determining a fourth tension value of the steel strip between the continuous casting machine and the rolling mill; When the fourth tension value is not equal to the tension target value, obtaining the updated speed compensation value according to the fourth tension value; The speed at which the rolling mill rolls the steel strip is readjusted according to the updated speed compensation value.

8. A control device for a strip steel casting and rolling system, characterized in that: The strip steel casting and rolling system comprises a continuous casting machine, a pinch roller and a rolling mill, wherein the pinch roller is used to transfer the strip steel produced by the continuous casting machine to the rolling mill, and the device comprises: an acquisition unit, configured to acquire a first torque of the pinch roller before the rolling mill rolls the steel strip; The acquisition unit is further used to detect the torque of the pinch roller during the process of the rolling mill rolling the strip steel to obtain a second torque; a processing unit, configured to determine a first tension value of the strip steel according to the first torque and the second torque; The processing unit is further used to determine a speed compensation value corresponding to the rolling mill according to the first tension value; A control unit is used to adjust the speed at which the rolling mill rolls the strip according to the speed compensation value.

9. A control device for a strip steel casting and rolling system, characterized in that: include: processor; A memory, wherein a program or instruction is stored in the memory, and when the processor executes the program or instruction in the memory, the steps of the control method of the strip casting and rolling system as claimed in any one of claims 1 to 7 are implemented.

10. A readable storage medium, characterized in that: The readable storage medium stores programs or instructions, and when the programs or instructions are executed by the processor, the steps of the control method of the strip casting and rolling system as described in any one of claims 1 to 7 are implemented.

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