Control method and device for continuous rolling mill train

Abstract

The application discloses a tandem mill control method and device, and relates to the technical field of rolling steel. The actual load of a target rack is obtained. If the actual load of the target rack is greater than a first preset load, the load of the target rack is too large, and overloading and steel pressing are caused. At this time, the roll gap of the target rack and all racks after the target rack are lifted, the roll gap of the rack is enlarged, the load borne by the strip steel is reduced, and overloading and steel pressing of the tandem mill can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel rolling technology, in particular to a continuous rolling mill control method and device. BACKGROUND

[0002] Overload pressing of the continuous rolling mill will not only cause loss of scrap steel, but also bring great impact on the equipment and great influence on the production. In order to ensure the quality of the strip steel and protect the equipment, it is necessary to prevent the overload pressing of the continuous rolling mill in production. SUMMARY

[0003] The present application provides a continuous rolling mill control method and device, which solves the technical problem of how to prevent the overload pressing of the continuous rolling mill.

[0004] In one aspect, the present application provides the following technical solutions:

[0005] A continuous rolling mill control method applied to a continuous rolling mill including multiple stands, comprising:

[0006] acquiring an actual load of a target stand;

[0007] if the actual load is greater than a first preset load, controlling the roll gap of the target stand and all stands after the target stand to be lifted up.

[0008] Preferably, the control of the roll gap of the target stand and all stands after the target stand to be lifted up comprises:

[0009] acquiring the thickness of the strip steel rolled by the target stand;

[0010] determining the roll gap lifting amount and the roll gap lifting speed of the target stand according to the thickness of the strip steel, and controlling the roll gap lifting of the target stand based on the roll gap lifting amount and the roll gap lifting speed of the target stand;

[0011] acquiring the running speed and the width of the strip steel rolled by each stand after the target stand, determining the roll gap lifting amount and the roll gap lifting speed of each stand after the target stand according to the thickness of the strip steel, the running speed of each stand after the target stand and the width of the strip steel, and controlling the roll gap lifting of each stand after the target stand based on the roll gap lifting amount and the roll gap lifting speed of each stand after the target stand.

[0012] Preferably, the determination of the roll gap lifting amount of the target stand according to the thickness of the strip steel comprises:

[0013] L=a*h, L is the roll gap lifting amount of the target stand, a is a coefficient, and h is the thickness of the strip steel.

[0014] Preferably, the roll gap lifting speed of the target stand is determined according to the strip thickness, comprising:

[0015] V = b * h, V is the roll gap lifting speed of the target stand, b is a coefficient, and h is the strip thickness.

[0016] Preferably, the roll gap lifting amount of each stand after the target stand is determined according to the strip thickness, the running speed of the target stand and each stand after the target stand, and the strip width, comprising:

[0017] Li = a * h * w * v / (wi * vi), Li is the roll gap lifting amount of the i th stand after the target stand, a is a coefficient, h is the strip thickness, w is the strip width of the target stand, v is the running speed of the target stand, wi is the strip width of the i th stand after the target stand, and vi is the running speed of the i th stand after the target stand.

[0018] Preferably, the roll gap lifting speed of each stand after the target stand is determined according to the strip thickness, the running speed of the target stand and each stand after the target stand, and the strip width, comprising:

[0019] Vi = b * h * w * v / (wi * vi), Vi is the roll gap lifting speed of the i th stand after the target stand, b is a coefficient, h is the strip thickness, w is the strip width of the target stand, v is the running speed of the target stand, wi is the strip width of the i th stand after the target stand, and vi is the running speed of the i th stand after the target stand.

[0020] In another aspect, the present application also provides the following technical solutions:

[0021] A continuous rolling mill control device applied to a continuous rolling mill including multiple stands, comprising:

[0022] An actual load acquisition module for acquiring the actual load of a target stand;

[0023] A continuous rolling mill control module for controlling the roll gap lifting of the target stand and all stands after the target stand if the actual load is greater than a first preset load.

[0024] Preferably, the continuous rolling mill control module controls the roll gap lifting of the target stand and all stands after the target stand, comprising:

[0025] Acquiring the strip thickness after rolling of the target stand;

[0026] According to the strip thickness, the roll gap lifting amount and the roll gap lifting speed of the target stand are determined, and the roll gap lifting of the target stand is controlled based on the roll gap lifting amount and the roll gap lifting speed of the target stand.

[0027] The running speed and the rolled strip width of each stand after the target stand are obtained, the roll gap lifting amount and the roll gap lifting speed of each stand after the target stand are determined according to the strip thickness, the running speed and the rolled strip width of each stand after the target stand, and the roll gap lifting of each stand after the target stand is controlled based on the roll gap lifting amount and the roll gap lifting speed of each stand after the target stand.

[0028] In another aspect, the present application also provides the technical solutions as follows:

[0029] An electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor implements any of the above continuous rolling mill group control methods when executing the program.

[0030] In another aspect, the present application also provides the technical solutions as follows:

[0031] A computer readable storage medium, the computer readable storage medium has a computer program stored thereon, and the computer program implements any of the above continuous rolling mill group control methods when executed by a processor.

[0032] The one or more technical solutions provided by the present application have at least the following technical effects or advantages:

[0033] The present application obtains the actual load of the target stand, and if the actual load of the target stand is greater than the first preset load, it represents that the load of the target stand is too large, which can cause overloading and pressing of the strip, at this time, the roll gap of the target stand and all stands after the target stand are controlled to be lifted, the roll gap of the stand is increased, the load on the strip can be reduced, and overloading and pressing of the continuous rolling mill group can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0035] Figure 1 The flow chart of the continuous rolling mill group control method in the embodiment of the present application;

[0036] Figure 2 The schematic diagram of the continuous rolling mill group control device in the embodiment of the present application. DETAILED DESCRIPTION

[0037] The embodiment of the present application provides a continuous rolling mill control method and device, and solves the technical problem of how to prevent the continuous rolling mill from overloading and pressing the steel.

[0038] In order to better understand the technical solutions of the present application, the technical solutions of the present application will be described in detail below in combination with the drawings of the specification and specific embodiments.

[0039] Firstly, the term "and / or" appearing in the present document is only used to describe the association relationship of the associated objects, and represents that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present document generally represents that the front and rear associated objects are in an "or" relationship.

[0040] As shown in the figure, the continuous rolling mill control method of the embodiment is applied to a continuous rolling mill including a plurality of stands, and includes the following steps. Figure 1 Step S1, obtaining the actual load of the target stand;

[0041] Step S2, if the actual load is greater than the first preset load, controlling the roll gap of the target stand and all stands after the target stand to be lifted up.

[0042] In the embodiment, only the load of one stand in the continuous rolling mill is generally too large, and the target stand is the stand that may have a load that is too large. The actual load of the target stand is greater than the first preset load, which represents that the load of the target stand is too large and will cause overloading and pressing of the steel. The first preset load can be 90% of the limit load of the target stand. When the load of the target stand is too large, the roll gap of the target stand and all stands after the target stand is controlled to be lifted up, and the roll gap of the stand is increased, which can reduce the load on the strip and can avoid overloading and pressing of the steel of the continuous rolling mill.

[0043] In step S2, the roll gap of the target stand and all stands after the target stand is controlled to be lifted up, which can include the following steps.

[0044] Obtaining the thickness of the strip after rolling of the target stand;

[0045] Determining the roll gap lifting amount and the roll gap lifting speed of the target stand according to the thickness of the strip, and controlling the roll gap lifting of the target stand based on the roll gap lifting amount and the roll gap lifting speed of the target stand;

[0046]

[0047] ​The running speed of the target stand and the running speed of each stand after the target stand and the width of the rolled strip are obtained; the roll gap lifting amount and the roll gap lifting speed of each stand after the target stand are determined according to the thickness of the strip, the running speed of the target stand and the width of the strip; and the roll gap lifting of each stand after the target stand is controlled based on the roll gap lifting amount and the roll gap lifting speed of each stand after the target stand.

[0048] In the formula, the roll gap lifting amount of the target stand can be determined according to the thickness of the strip, which can include L=a*h, where L is the roll gap lifting amount of the target stand, a is a coefficient, which can be 0.02 or 0.05, etc., and h is the thickness of the strip. The roll gap lifting speed of the target stand can be determined according to the thickness of the strip, which can include V=b*h, where V is the roll gap lifting speed of the target stand, b is a coefficient, which can be 0.2 or 0.5, etc., and h is the thickness of the strip. The roll gap lifting amount of each stand after the target stand can be determined according to the thickness of the strip, the running speed of the target stand and the width of the strip, which can include Li=a*h*w*v / (wi*vi), where Li is the roll gap lifting amount of the i th stand after the target stand, a is a coefficient, h is the thickness of the strip, w is the width of the strip of the target stand, v is the running speed of the target stand, wi is the width of the strip of the i th stand after the target stand, and vi is the running speed of the i th stand after the target stand. The roll gap lifting speed of each stand after the target stand can be determined according to the thickness of the strip, the running speed of the target stand and the width of the strip, which can include Vi=b*h*w*v / (wi*vi), where Vi is the roll gap lifting speed of the i th stand after the target stand, b is a coefficient, h is the thickness of the strip, w is the width of the strip of the target stand, v is the running speed of the target stand, wi is the width of the strip of the i th stand after the target stand, and vi is the running speed of the i th stand after the target stand.

[0049] In the embodiment, the width of the rolled strip of each stand is basically unchanged, and the running speed of the stand is generally faster as the stand is farther away from the target stand. In the case where the thickness of the rolled strip of the target stand is known, the roll gap lifting amount and the roll gap lifting speed of the stand after the target stand are smaller as the stand is farther away from the target stand. The w*v / (wi*vi) in the formula above reflects the relationship of the flow balance.

[0050] It can be understood that the more serious the actual load overload of the target stand is, the smaller h will be. Assuming that the first preset load is 90% of the limit load and the second preset load is 95% of the limit load, if the values of a and b are the same in the two cases that the actual load of the target stand is between 90% and 95% of the limit load and the actual load of the target stand is above 95% of the limit load, the more serious the actual load overload is, the smaller the roll gap lifting amount and the roll gap lifting speed of each stand will be, and the requirement of avoiding overload pressing cannot be met. Therefore, in the embodiment, a of the target stand when the actual load is greater than the second preset load is greater than a of the target stand when the actual load is between the first preset load and the second preset load; b of the target stand when the actual load is greater than the second preset load is greater than b of the target stand when the actual load is between the first preset load and the second preset load, and the second preset load is greater than the first preset load. For example, if the actual load of the target stand is between 90% and 95% of the limit load, a = 0.02 and b = 0.2 can be selected; if the actual load of the target stand is above 95% of the limit load, a = 0.05 and b = 0.5 can be selected. In this way, the more serious the actual load overload is, the greater the values of a and b are, and the roll gap lifting amount and the roll gap lifting speed of each stand can meet the requirements.

[0051] As shown in Figure 2 The embodiment also provides a continuous rolling mill control device, which is applied to a continuous rolling mill including a plurality of stands and includes:

[0052] An actual load acquisition module is configured to acquire an actual load of a target stand.

[0053] A continuous rolling mill control module is configured to control roll gap lifting of the target stand and all stands after the target stand if the actual load is greater than a first preset load.

[0054] The continuous rolling mill control module controls roll gap lifting of the target stand and all stands after the target stand, including:

[0055] The thickness of the strip after rolling of the target stand is acquired.

[0056] The roll gap lifting amount and the roll gap lifting speed of the target stand are determined according to the thickness of the strip, and roll gap lifting of the target stand is controlled based on the roll gap lifting amount and the roll gap lifting speed of the target stand.

[0057] The running speed and the width of the strip after rolling of the target stand and each stand after the target stand are acquired, the roll gap lifting amount and the roll gap lifting speed of each stand after the target stand are determined according to the thickness of the strip, the running speed and the width of the strip of each stand after the target stand, and roll gap lifting of each stand after the target stand is controlled based on the roll gap lifting amount and the roll gap lifting speed of each stand after the target stand.

[0058] Based on the same inventive concept as the continuous rolling mill group control method described above, the embodiment also provides an electronic device, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of any of the continuous rolling mill group control methods described above when executing the program.

[0059] The bus architecture (represented by the bus) can include any number of interconnected buses and bridges, and the bus links various circuits including one or more processors represented by the processor and the memory represented by the memory. The bus can also link various other circuits such as peripheral devices, voltage stabilizers, and power management circuits, which are well known in the art, and therefore, will not be further described herein. The bus interface provides an interface between the bus and the receiver and the transmitter. The receiver and the transmitter can be the same element, i.e., the transceiver, which provides a unit for communicating with various other devices on the transmission medium. The processor is responsible for managing the bus and general processing, while the memory can be used to store data used by the processor when performing operations.

[0060] Since the electronic device introduced in the embodiment is the electronic device used to implement the continuous rolling mill group control method in the embodiment, based on the continuous rolling mill group control method introduced in the embodiment, those skilled in the art can understand the specific implementation of the electronic device in the embodiment and various changes thereof, so the implementation of the electronic device in the embodiment will not be further described herein. As long as the electronic device used to implement the continuous rolling mill group control method in the embodiment is implemented by those skilled in the art, it belongs to the scope of the present application.

[0061] Based on the same inventive concept as the continuous rolling mill group control method described above, the present application also provides a computer readable storage medium, which stores a computer program, and the computer program implements any of the continuous rolling mill group control methods when executed by a processor.

[0062] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, ab-ROM, optical storage, etc.) containing computer usable program code.

[0063] The present application is described in reference to the flowchart illustrations and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams.

[0064] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams.

[0065] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams.

[0066] While the preferred embodiments of the application have been described, additional variations and modifications can be made to the embodiments by those of skill in the art once they have the benefit of the present disclosure without departing from the spirit and scope of the application. Accordingly, the attached claims are intended to embrace all such variations and modifications as fall within the scope of the present application.

[0067] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A continuous rolling mill control method, applied to a continuous rolling mill comprising multiple stands, characterized in that, include: Obtain the actual load on the target rack; If the actual load is greater than the first preset load, then the strip thickness after rolling on the target stand is obtained; The roll gap lifting amount and roll gap lifting speed of the target frame are determined based on the strip thickness, and the roll gap lifting of the target frame is controlled based on the roll gap lifting amount and roll gap lifting speed of the target frame. The operating speed and strip width after rolling of the target stand and each stand after the target stand are obtained; The roll gap lift and roll gap lift speed of each stand after the target stand are determined based on the strip thickness, the operating speed of the target stand and each stand after the target stand, and the strip width. The roll gap lifting of each frame after the target frame is controlled based on the roll gap lifting amount and roll gap lifting speed of each frame after the target frame; The step of determining the roll gap lift of the target frame based on the strip thickness includes: L = a * h, where L is the roll gap lifting amount of the target frame, a is a coefficient, and h is the strip thickness; The step of determining the roll gap lifting speed of the target frame based on the strip thickness includes: V = b * h, where V is the roll gap lifting speed of the target frame, b is a coefficient, and h is the strip thickness; Wherein, the first preset load is 90% of the ultimate load, and the second preset load is 95% of the ultimate load; if the actual load is greater than the second preset load, then a = a1, b = b1; if the actual load is less than the second preset load, then a = a2, b = b2; and a1 > a2, a1 > a2.

2. The continuous rolling mill control method as described in claim 1, characterized in that, The roll gap lift of each stand after the target stand is determined based on the strip thickness, the operating speed of the target stand and each stand after the target stand, and the strip width, including: L i =a*h*w*v / (w i *v i ), L i Let a be the roll gap lift of the i-th stand after the target stand, a be a coefficient, h be the strip thickness, w be the strip width of the target stand, v be the running speed of the target stand, and w be the strip width of the target stand. i v is the strip width of the i-th frame following the target frame. i The operating speed of the i-th rack following the target rack.

3. The continuous rolling mill control method as described in claim 1, characterized in that, Determining the roll gap lifting speed of each stand after the target stand based on the strip thickness, the operating speed of the target stand and each stand after the target stand, and the strip width includes: V i =b*h*w*v / (w i *v i V i Let b be the roll gap lifting speed of the i-th stand after the target stand, h be the strip thickness, w be the strip width of the target stand, and v be the running speed of the target stand. i v is the strip width of the i-th frame following the target frame. i The operating speed of the i-th rack following the target rack.

4. A continuous rolling mill control device, applied to a continuous rolling mill comprising multiple stands, characterized in that, include: The actual load acquisition module is used to acquire the actual load of the target rack; The continuous rolling mill control module is used to obtain the strip thickness after rolling on the target stand if the actual load is greater than the first preset load. The roll gap lifting amount and roll gap lifting speed of the target frame are determined based on the strip thickness, and the roll gap lifting of the target frame is controlled based on the roll gap lifting amount and roll gap lifting speed of the target frame. The operating speed and strip width after rolling of the target stand and each stand after the target stand are obtained; The roll gap lift and roll gap lift speed of each stand after the target stand are determined based on the strip thickness, the operating speed of the target stand and each stand after the target stand, and the strip width. The roll gap lifting of each frame after the target frame is controlled based on the roll gap lifting amount and roll gap lifting speed of each frame after the target frame; The step of determining the roll gap lift of the target frame based on the strip thickness includes: L = a * h, where L is the roll gap lifting amount of the target frame, a is a coefficient, and h is the strip thickness; The step of determining the roll gap lifting speed of the target frame based on the strip thickness includes: V = b * h, where V is the roll gap lifting speed of the target frame, b is a coefficient, and h is the strip thickness; Wherein, the first preset load is 90% of the ultimate load, and the second preset load is 95% of the ultimate load; if the actual load is greater than the second preset load, then a = a1, b = b1; if the actual load is less than the second preset load, then a = a2, b = b2; and a1 > a2, a1 > a2.

5. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the continuous rolling mill control method according to any one of claims 1-3.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the continuous rolling mill control method according to any one of claims 1-3.

Images