Rolling production line and control method thereof
By designing the rolling production line of multiple sub-production lines and using the switching mechanism to achieve connection and switching of different sub-production lines, the problem of the production line covering fewer products is solved, and the production line diversification and cost reduction are achieved.
Patent Information
- Application Number
- CN202411212400.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-02-25
AI Technical Summary
The rolling production line can cover fewer varieties of raw products, which leads to enterprises need to establish more production lines to produce different varieties, which increases enterprise costs and reduces competitiveness.
A rolling production line is designed, including multiple upstream and downstream sub-production lines. The switching mechanism enables the connection and switching of different sub-production lines, and can produce different varieties of steel.
Through this design, the types of products that can be covered by rolling production lines are increased, the demand for establishing multiple production lines is reduced, the cost of enterprises is reduced, and competitiveness is improved.
Smart Images
Figure CN119500763A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of rolling, and in particular relates to a rolling production line and a control method thereof. Background Art
[0002] Some rolling lines can produce high-speed bars but not high-speed wire rods, others can produce high-speed wire rods but not high-speed bars, and still others can produce standard steel but not specialty steels. This results in a limited range of product varieties that rolling lines can cover, forcing companies to build more production lines to produce different varieties. This increases costs and reduces competitiveness. Therefore, the limited range of product varieties that rolling lines can cover is a technical issue that needs to be addressed urgently. Summary of the Invention
[0003] The embodiment of the present invention provides a rolling production line and a control method thereof, which solves the technical problem that the rolling production line can cover a small number of product varieties.
[0004] In the first aspect, an embodiment of the present invention provides a rolling production line, comprising: a first upstream sub-line, the first upstream sub-line including a heating furnace; a first downstream sub-line, the first downstream sub-line including a first high-wire finishing mill; a second upstream sub-line; a second downstream sub-line, the second downstream sub-line including a second high-wire finishing mill; a third downstream sub-line, the third downstream sub-line including a high-rod finishing mill; a switching mechanism, when the switching mechanism is in a first state, the first upstream sub-line is connected to the third downstream sub-line, and the second upstream sub-line is connected to the second downstream sub-line, when the switching mechanism is in a second state, the first upstream sub-line is connected to the first downstream sub-line, and the second upstream sub-line is connected to the third downstream sub-line, when the switching mechanism is in a third state, the first upstream sub-line is connected to the first downstream sub-line, and the second upstream sub-line is connected to the second downstream sub-line.
[0005] In combination with the first aspect of the present invention, in some embodiments, the switching mechanism includes: a control switching sub-mechanism for switching the control object, the control switching sub-mechanism including a branching guide groove and a guide groove cylinder; and a power supply switching sub-mechanism for switching the power supply object.
[0006] In combination with the first aspect of the present invention, in some embodiments, the rolling production line further includes a first power supply device arranged on the first upstream sub-production line and a second power supply device arranged on the second upstream sub-production line, and the power supply switching sub-mechanism includes: a first contactor, the first end of the first contactor is connected to the second power supply device, and the second end of the first contactor is connected to the power equipment of the second downstream sub-production line; a second contactor, the first end of the second contactor is connected to the second power supply device, and the second end of the second contactor is connected to the power equipment of the third downstream sub-production line, and the first contactor and the second contactor are interlocked; a third contactor, the first end of the third contactor is connected to the first power supply device, and the second end of the third contactor is connected to the power equipment of the third downstream sub-production line equipment, the second contactor and the third contactor are interlocked; a fourth contactor, the first end of the fourth contactor is connected to the first power supply equipment, the second end of the fourth contactor is connected to the electrical equipment of the first downstream sub-production line, and the third contactor and the fourth contactor are interlocked; when the switching mechanism is in the first state, the first contactor is closed, the second contactor is opened, the third contactor is closed, and the fourth contactor is opened; when the switching mechanism is in the second state, the first contactor is opened, the second contactor is closed, the third contactor is opened, and the fourth contactor is closed; when the switching mechanism is in the third state, the first contactor is closed, the second contactor is opened, the third contactor is opened, and the fourth contactor is closed.
[0007] In combination with the first aspect of the present invention, in some embodiments, the power supply switching sub-mechanism further includes: a first isolating switch, arranged between the first contactor and the second power supply device; a second isolating switch, arranged between the second contactor and the second power supply device; a third isolating switch, arranged between the third contactor and the first power supply device; and a fourth isolating switch, arranged between the fourth contactor and the first power supply device.
[0008] In combination with the first aspect of the present invention, in some embodiments, the first upstream sub-production line further includes: a furnace discharge roller, arranged at the outlet side of the heating furnace; a first roughing mill group, arranged at the end of the furnace discharge roller; a first flying shear, arranged at the outlet side of the first roughing mill group; a first intermediate rolling mill group, arranged at the outlet side of the first flying shear; a second flying shear, arranged at the outlet side of the first intermediate rolling mill group; and a first pre-finishing mill group, arranged at the outlet side of the second flying shear.
[0009] In combination with the first aspect of the present invention, in some embodiments, the first downstream sub-production line further includes: a third flying shear, which is arranged at the entrance side of the first high-speed wire finishing mill.
[0010] In combination with the first aspect of the present invention, in some embodiments, the second upstream sub-production line includes: a straight rolling roller; a second roughing mill group, arranged at the end of the straight rolling roller; a fourth flying shear, arranged at the outlet side of the second roughing mill group; a second intermediate rolling mill group, arranged at the outlet side of the fourth flying shear; a fifth flying shear, arranged at the outlet side of the second intermediate rolling mill group; and a second pre-finishing mill group, arranged at the outlet side of the fifth flying shear.
[0011] In combination with the first aspect of the present invention, in some embodiments, the second downstream sub-production line further includes: a sixth flying shear, arranged at the entrance side of the second high-wire finishing mill; the third downstream sub-production line further includes: a seventh flying shear, arranged at the entrance side of the high-bar finishing mill.
[0012] In combination with the first aspect of the present invention, in some embodiments, the communication mode of each sub-production line includes a DP communication mode.
[0013] In a second aspect, an embodiment of the present invention provides a control method for a rolling production line, which is applied to a rolling production line as described in any one of the first aspects, and the method includes: obtaining a production control signal; if the production control signal indicates that the first upstream sub-production line is connected to the third downstream sub-production line, and the second upstream sub-production line is connected to the second downstream sub-production line, controlling the switching mechanism to be in the first state; if the production control signal indicates that the first upstream sub-production line is connected to the first downstream sub-production line, and the second upstream sub-production line is connected to the third downstream sub-production line, controlling the switching mechanism to be in the second state; if the production control signal indicates that the first upstream sub-production line is connected to the first downstream sub-production line, and the second upstream sub-production line is connected to the second downstream sub-production line, controlling the switching mechanism to be in the third state.
[0014] The one or more technical solutions provided by the embodiments of the present invention achieve at least the following technical effects or advantages:
[0015] The rolling production line provided in an embodiment of the present invention includes: a first upstream sub-line, the first upstream sub-line includes a heating furnace; a first downstream sub-line, the first downstream sub-line includes a first high-wire finishing mill; a second upstream sub-line; a second downstream sub-line, the second downstream sub-line includes a second high-wire finishing mill; a third downstream sub-line, the third downstream sub-line includes a high-bar finishing mill; a switching mechanism, when the switching mechanism is in a first state, the first upstream sub-line is connected to the third downstream sub-line, and the second upstream sub-line is connected to the second downstream sub-line, when the switching mechanism is in a second state, the first upstream sub-line is connected to the first downstream sub-line, and the second upstream sub-line is connected to the third downstream sub-line, when the switching mechanism is in a third state, the first upstream sub-line is connected to the first downstream sub-line, and the second upstream sub-line is connected to the second downstream sub-line. The production line consisting of the first upstream sub-line and the third downstream sub-line can produce high-speed bars of various steel grades, the production line consisting of the second upstream sub-line and the second downstream sub-line can produce high-speed wire rods, the production line consisting of the first upstream sub-line and the first downstream sub-line can produce high-speed wire rods of various steel grades, and the production line consisting of the second upstream sub-line and the third downstream sub-line can produce high-speed bars. Therefore, the variety of products that can be covered by the rolling line has increased. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0017] Figure 1 Schematic diagram of a rolling production line according to an embodiment of the present invention;
[0018] Figure 2 A specific schematic diagram of a rolling production line in an embodiment of the present invention;
[0019] Figure 3 This is a first schematic diagram of power supply switching in an embodiment of the present invention;
[0020] Figure 4 This is a second schematic diagram of power supply switching in an embodiment of the present invention;
[0021] Figure 5 This is a schematic diagram of a first DP communication method according to an embodiment of the present invention;
[0022] Figure 6 This is a second schematic diagram of the DP communication method in an embodiment of the present invention. DETAILED DESCRIPTION
[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.
[0024] In the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions of various embodiments may be combined with each other, but this must be based on the fact that they can be implemented by a person of ordinary skill in the art. If the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.
[0025] Figure 1 Schematic diagram of a rolling production line in an embodiment of the present invention. Figure 1 As shown, a rolling production line provided by an embodiment of the present invention includes: a first upstream sub-line 10, the first upstream sub-line 10 includes a heating furnace 110; a first downstream sub-line 20, the first downstream sub-line 20 includes a first high-wire finishing mill 210; a second upstream sub-line 30; a second downstream sub-line 40, the second downstream sub-line 40 includes a second high-wire finishing mill 410; a third downstream sub-line 50, the third downstream sub-line 50 includes a high-bar finishing mill 510; a switching mechanism 60, when the switching mechanism 60 is in a first state, the first upstream sub-line 10 is connected to the third downstream sub-line 50, and the second upstream sub-line 30 is connected to the second downstream sub-line 40, when the switching mechanism 60 is in a second state, the first upstream sub-line 10 is connected to the first downstream sub-line 20, and the second upstream sub-line 30 is connected to the third downstream sub-line 50, when the switching mechanism 60 is in a third state, the first upstream sub-line 10 is connected to the first downstream sub-line 20, and the second upstream sub-line 30 is connected to the second downstream sub-line 40.
[0026] It should be noted that, since the first upstream sub-production line 10 includes a heating furnace 110, it can control the temperature of the steel to meet subsequent processing requirements, and therefore can produce various types of steel.
[0027] In some embodiments, reference Figure 2 As shown, Figure 2This is a specific schematic diagram of the rolling production line in an embodiment of the present invention. The first upstream sub-production line 10 may also include: a furnace discharge roller 120, arranged at the outlet side of the heating furnace 110; a first roughing mill group 130, arranged at the end of the furnace discharge roller 120; a first flying shear 140, arranged at the outlet side of the first roughing mill group 130; a first intermediate rolling mill group 150, arranged at the outlet side of the first flying shear 140; a second flying shear 160, arranged at the outlet side of the first intermediate rolling mill group 150; and a first pre-finishing rolling mill group 170, arranged at the outlet side of the second flying shear 160.
[0028] In some embodiments, reference Figure 2 As shown, the first downstream sub-production line 20 may further include: a third flying shear 220 , which is arranged at the entrance side of the first high-speed wire finishing mill 210 .
[0029] In some embodiments, reference Figure 2 As shown, the second upstream sub-production line 30 may include: a straight rolling roller 310; a second roughing mill group 320, arranged at the end of the straight rolling roller 310; a fourth flying shear 330, arranged at the outlet side of the second roughing mill group 320; a second intermediate rolling mill group 340, arranged at the outlet side of the fourth flying shear 330; a fifth flying shear 350, arranged at the outlet side of the second intermediate rolling mill group 340; and a second pre-finishing rolling mill group 360, arranged at the outlet side of the fifth flying shear 350.
[0030] In some embodiments, reference Figure 2 As shown, the second downstream sub-production line 40 may further include: a sixth flying shear 420 , arranged at the entrance side of the second high wire finishing mill 410 ; the third downstream sub-production line 50 may further include: a seventh flying shear 520 , arranged at the entrance side of the high bar finishing mill 510 .
[0031] In some embodiments, the switching mechanism 60 may include: a control switching sub-mechanism for switching the control object, the control switching sub-mechanism including a branching guide groove 610 and a guide groove cylinder 620; and a power supply switching sub-mechanism for switching the power supply object.
[0032] It should be noted that the control switching sub-mechanism is used to switch the control object. Specifically, the first upstream sub-line 10, the first downstream sub-line 20, the second upstream sub-line 30, the second downstream sub-line 40, and the third downstream sub-line 50 all include control circuits. When the first upstream sub-line 10 is connected to the third downstream sub-line 50, the control circuit of the first upstream sub-line 10 is connected to the control circuit of the third downstream sub-line 50 to control the production line consisting of the first upstream sub-line 10 and the third downstream sub-line 50. When the second upstream sub-line 30 is connected to the second downstream sub-line 40, the control circuit of the second upstream sub-line 30 is connected to the control circuit of the second downstream sub-line 40 to control the production line consisting of the second upstream sub-line 30 and the second downstream sub-line 40.
[0033] In some embodiments, the rolling production line also includes a first power supply device arranged on the first upstream sub-production line 10 and a second power supply device arranged on the second upstream sub-production line 30, and the power supply switching sub-mechanism may include: a first contactor 630, the first end of the first contactor 630 is connected to the second power supply device, and the second end of the first contactor 630 is connected to the power equipment of the second downstream sub-production line 40; a second contactor 640, the first end of the second contactor 640 is connected to the second power supply device, and the second end of the second contactor 640 is connected to the power equipment of the third downstream sub-production line 50, and the first contactor 630 and the second contactor 640 are interlocked; a third contactor 650, the first end of the third contactor 650 is connected to the first power supply device, the second end of the third contactor 650 is connected to the power equipment of the third downstream sub-production line 50, and the second contactor The first contactor 630 is closed, the second contactor 640 is opened, the third contactor 650 is closed, and the fourth contactor 660 is opened. When the switching mechanism 60 is in the first state, the first contactor 630 is closed, the second contactor 640 is opened, the third contactor 650 is closed, and the fourth contactor 660 is opened. When the switching mechanism 60 is in the second state, the first contactor 630 is opened, the second contactor 640 is closed, the third contactor 650 is opened, and the fourth contactor 660 is closed. When the switching mechanism 60 is in the third state, the first contactor 630 is closed, the second contactor 640 is opened, the third contactor 650 is opened, and the fourth contactor 660 is closed.
[0034] It should be noted that the interlocking of two contactors means that when one contactor is closed, the other one is automatically opened.
[0035] In some embodiments, the power supply switching sub-mechanism may further include: a first isolating switch 670, arranged between the first contactor 630 and the second power supply device; a second isolating switch 680, arranged between the second contactor 640 and the second power supply device; a third isolating switch 690, arranged between the third contactor 650 and the first power supply device; and a fourth isolating switch 691, arranged between the fourth contactor 660 and the first power supply device.
[0036] It should be noted that by setting up an isolating switch, the power supply can be isolated in time when it is necessary to cut off the power supply, thereby ensuring the safety of the circuit.
[0037] It should be noted that the main power supply of the finishing mill motor is 3150V, the excitation power supply of the finishing mill is 220V, and the encoder power supply is 24V. It is divided into medium voltage and low voltage parts. The main power supply belongs to the medium voltage part, and the excitation and encoder belong to the low voltage part. Considering the cable's voltage resistance, safety distance, etc., it is necessary to separate the medium and low voltage. The main power supply and excitation power supply switching can refer to Figure 3 and Figure 4 As shown, other switches are similar. Figure 3 This is a first schematic diagram of power supply switching in an embodiment of the present invention. The second inverter excitation power supply is the second power supply device, the first inverter excitation power supply is the first power supply device, the second finishing mill motor excitation is the power equipment of the second downstream sub-production line 40, the first finishing mill motor excitation is the power equipment of the first downstream sub-production line 20, and the high bar finishing mill 510 motor excitation is the power equipment of the third downstream sub-production line 50. Figure 4 This is a second schematic diagram of power supply switching in an embodiment of the present invention. The main circuit power supply of the second inverter is the second power supply device, the main circuit power supply of the first inverter is the first power supply device, the main circuit of the second finishing mill motor is the power equipment of the second downstream sub-production line 40, the main circuit of the first finishing mill motor is the power equipment of the first downstream sub-production line 20, and the main circuit of the high-bar finishing mill 510 motor is the power equipment of the third downstream sub-production line 50.
[0038] In some embodiments, the communication mode of each sub-production line includes a DP (Decentralized Periphery) communication mode.
[0039] refer to Figure 5 As shown, Figure 5This is a first schematic diagram of the DP communication method in an embodiment of the present invention. Assuming that the production line composed of the first upstream sub-production line 10 and the first downstream sub-production line 20 is the first complete production line, and the production line composed of the second upstream sub-production line 30 and the second downstream sub-production line 40 is the second complete production line, then the communication method between the first complete production line and the second complete production line adopts the DP / DP COUPLER communication method, and the key parameters of the high-bar PLC (Programmable Logic Controller) hanging on the second complete production line are transmitted to the PLC of the first complete production line through this communication method to realize information collection during production line switching.
[0040] refer to Figure 6 As shown, Figure 6 This is a second schematic diagram of the DP communication method in an embodiment of the present invention. In order to realize the communication between the north line operating console of the first upstream sub-production line 10 and the high-rod PLC of the third downstream sub-production line 50, the same DP communication method as the south line operating console of the second upstream sub-production line 30 is adopted. On the basis of the north line operating console, an ET200 station is added to communicate with the high-rod PLC. However, due to the long distance, the longer the DP line, the worse the communication effect. Therefore, the optical fiber to DP method is used to solve the problem of long distance.
[0041] It should be noted that the second upstream sub-production line 30 dismantled the heating furnace 110 after applying the direct rolling technology of continuous casting billets without heating. After the first upstream sub-production line 10 switched to the third downstream sub-production line 50, it did not have the conditions to produce various types of steel, resulting in the inability to fully cover the production varieties in the operation area. When the high wire and high bar are switched between production lines, if the motor, excitation, encoder, fan and temperature measurement are manually connected, the transmission parameters are manually modified, and the position of the branch guide groove 610 is manually confirmed, each switching takes 2 to 3 hours, and it is easy to make mistakes during the switching process, which poses a great safety risk. Therefore, the embodiment of the present invention realizes automatic switching of production lines by setting a switching mechanism 60, improves switching efficiency, and can also improve production safety.
[0042] It should be noted that in this embodiment of the present invention, a branching guide 610 and related actuators are added to the process, a switching device and communication module are added to the electrical hardware, and parameters and programs are modified in the software to achieve one-touch switching of the high-speed wire rod process. While the branching guide 610 of the original first upstream sub-line 10 remains unchanged, a branching guide 610 is added to the second upstream sub-line 30. To achieve the one-touch switching function, a guide cylinder 620 is also required, along with a corresponding controlled solenoid valve and a branch position proximity switch.
[0043] It should be noted that during the switching of the inverter parameters of the finishing mill, the drive motor has changed, so the inverter parameters of the corresponding motor need to be reset when switching. Manual input takes 30 minutes and is prone to input errors. The macro parameter switching method is simply to package two completely different sets of parameters and mark them as belonging to the high-wire finishing mill motor or the high-bar finishing mill 510 motor. The macro parameters are then effectively switched through the PLC program and the switching results are transmitted back to the PLC. This can reduce switching time and the probability of errors. It should be noted that all high-bar motor wiring switching, encoder wiring switching, inverter parameter switching, fan and water system switching, etc., console HMI screen switching, and three types of rolling line logic switching of high-bar and production lines require modification of the PLC program to achieve a one-button switching function.
[0044] The rolling production line provided by the embodiment of the present invention includes: a first upstream sub-line 10, the first upstream sub-line 10 includes a heating furnace 110; a first downstream sub-line 20, the first downstream sub-line 20 includes a first high-wire finishing mill 210; a second upstream sub-line 30; a second downstream sub-line 40, the second downstream sub-line 40 includes a second high-wire finishing mill 410; a third downstream sub-line 50, the third downstream sub-line 50 includes a high-bar finishing mill 510; a switching mechanism 60, when the switching mechanism 60 is in a first state, the first upstream sub-line 10 is connected to the third downstream sub-line 50, and the second upstream sub-line 30 is connected to the second downstream sub-line 40; when the switching mechanism 60 is in a second state, the first upstream sub-line 10 is connected to the first downstream sub-line 20, and the second upstream sub-line 30 is connected to the third downstream sub-line 50; when the switching mechanism 60 is in a third state, the first upstream sub-line 10 is connected to the first downstream sub-line 20, and the second upstream sub-line 30 is connected to the second downstream sub-line 40. The production line consisting of the first upstream sub-line 10 and the third downstream sub-line 50 can produce high-speed bars of various steel grades. The production line consisting of the second upstream sub-line 30 and the second downstream sub-line 40 can produce high-speed wire rods. The production line consisting of the first upstream sub-line 10 and the first downstream sub-line 20 can produce high-speed wire rods of various steel grades. The production line consisting of the second upstream sub-line 30 and the third downstream sub-line 50 can produce high-speed bars. Thus, the variety of products that can be covered by the rolling line has increased.
[0045] Based on the same inventive concept, an embodiment of the present invention provides a control method for a rolling production line, which is applied to a rolling production line, and the method includes: obtaining a production control signal; if the production control signal indicates that the first upstream sub-production line 10 is connected to the third downstream sub-production line 50, and the second upstream sub-production line 30 is connected to the second downstream sub-production line 40, the control switching mechanism 60 is in a first state; if the production control signal indicates that the first upstream sub-production line 10 is connected to the first downstream sub-production line 20, and the second upstream sub-production line 30 is connected to the third downstream sub-production line 50, the control switching mechanism 60 is in a second state; if the production control signal indicates that the first upstream sub-production line 10 is connected to the first downstream sub-production line 20, and the second upstream sub-production line 30 is connected to the second downstream sub-production line 40, the control switching mechanism 60 is in a third state.
[0046] In some embodiments, controlling the switching mechanism 60 to be in the first state includes controlling the first contactor 630 to be closed, the second contactor 640 to be open, the third contactor 650 to be closed, and the fourth contactor 660 to be open. Controlling the switching mechanism 60 to be in the second state includes controlling the first contactor 630 to be open, the second contactor 640 to be closed, the third contactor 650 to be open, and the fourth contactor 660 to be closed. Controlling the switching mechanism 60 to be in the third state includes controlling the first contactor 630 to be closed, the second contactor 640 to be open, the third contactor 650 to be open, and the fourth contactor 660 to be closed.
[0047] It should be noted that when switching between high-speed wire and high-roller production lines, manually rewiring the motor, excitation, encoder, fan, and temperature measurement wiring, manually modifying transmission parameters, and manually confirming the position of the branch guide groove 610 takes 2 to 3 hours per switch, and the switching process is prone to errors, posing a significant safety risk. Therefore, the embodiment of the present invention, by providing a switching mechanism 60, achieves automatic switching of production lines, improves switching efficiency, and also enhances production safety.
[0048] It should be understood that more implementation details of the control method of the rolling production line in the embodiment of the present invention can be found in the aforementioned rolling production line, and for the sake of brevity of the description, they will not be repeated here.
[0049] The foregoing description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be included within the scope of the claims.
Claims
1. A rolling production line, characterized in that: include: a first upstream sub-production line, the first upstream sub-production line comprising a heating furnace; a first downstream sub-production line, the first downstream sub-production line comprising a first high-line finishing mill; A second upstream sub-production line; a second downstream sub-production line, the second downstream sub-production line comprising a second high-line finishing mill; A third downstream sub-production line, wherein the third downstream sub-production line includes a high-bar finishing mill; A switching mechanism, when the switching mechanism is in a first state, the first upstream sub-production line is connected to the third downstream sub-production line, and the second upstream sub-production line is connected to the second downstream sub-production line; when the switching mechanism is in a second state, the first upstream sub-production line is connected to the first downstream sub-production line, and the second upstream sub-production line is connected to the third downstream sub-production line; when the switching mechanism is in a third state, the first upstream sub-production line is connected to the first downstream sub-production line, and the second upstream sub-production line is connected to the second downstream sub-production line.
2. The rolling production line according to claim 1, characterized in that: The switching mechanism comprises: A control switching sub-mechanism, used for switching a control object, wherein the control switching sub-mechanism comprises a line dividing guide groove and a guide groove cylinder; The power supply switching sub-mechanism is used to switch the power supply object.
3. The rolling production line according to claim 2, characterized in that: The rolling production line further includes a first power supply device arranged on the first upstream sub-production line and a second power supply device arranged on the second upstream sub-production line, and the power supply switching sub-mechanism includes: a first contactor, wherein a first end of the first contactor is connected to the second power supply device, and a second end of the first contactor is connected to an electrical device of the second downstream sub-production line; a second contactor, wherein a first end of the second contactor is connected to the second power supply device, a second end of the second contactor is connected to the power consumption device of the third downstream sub-production line, and the first contactor and the second contactor are interlocked; a third contactor, wherein a first end of the third contactor is connected to the first power supply device, a second end of the third contactor is connected to the power consumption device of the third downstream sub-production line, and the second contactor and the third contactor are interlocked; a fourth contactor, wherein a first end of the fourth contactor is connected to the first power supply device, a second end of the fourth contactor is connected to the power consumption device of the first downstream sub-production line, and the third contactor and the fourth contactor are interlocked; When the switching mechanism is in the first state, the first contactor is closed, the second contactor is opened, the third contactor is closed, and the fourth contactor is opened; when the switching mechanism is in the second state, the first contactor is opened, the second contactor is closed, the third contactor is opened, and the fourth contactor is closed; when the switching mechanism is in the third state, the first contactor is closed, the second contactor is opened, the third contactor is opened, and the fourth contactor is closed.
4. The rolling production line according to claim 3, characterized in that: The power supply switching sub-mechanism also includes: A first isolating switch, arranged between the first contactor and the second power supply device; A second isolating switch is provided between the second contactor and the second power supply device; A third isolating switch is provided between the third contactor and the first power supply device; The fourth isolating switch is arranged between the fourth contactor and the first power supply device.
5. The rolling production line according to any one of claims 1 to 4, characterized in that: The first upstream sub-production line further includes: A furnace discharge roller table, arranged at the outlet side of the heating furnace; A first rough rolling mill group is arranged at the end of the furnace exit roller table; a first flying shear, arranged at the outlet side of the first roughing mill group; A first intermediate rolling mill group is arranged at the outlet side of the first flying shear; A second flying shear is arranged at the outlet side of the first intermediate rolling mill group; The first pre-finishing rolling mill group is arranged at the outlet side of the second flying shear.
6. The rolling production line according to claim 5, characterized in that: The first downstream sub-production line further includes: The third flying shear is arranged at the entrance side of the first high-speed wire finishing mill.
7. The rolling production line according to claim 6, characterized in that The second upstream sub-production line comprises: Direct rolling roller table; A second rough rolling mill group is arranged at the end of the straight rolling roller table; a fourth flying shear, arranged at the outlet side of the second roughing mill group; A second intermediate rolling mill group is arranged at the outlet side of the fourth flying shear; a fifth flying shear, arranged at the exit side of the second intermediate rolling mill group; The second pre-finishing rolling mill group is arranged at the outlet side of the fifth flying shear.
8. The rolling production line according to claim 7, characterized in that: The second downstream sub-production line further includes: a sixth flying shear, arranged at the inlet side of the second high-speed wire finishing mill; The third downstream sub-production line also includes: a seventh flying shear, which is arranged at the inlet side of the high rod finishing mill.
9. The rolling production line according to claim 1, characterized in that: The communication mode of each sub-production line includes DP communication mode.
10. A method for controlling a rolling production line, applied to the rolling production line according to any one of claims 1 to 9, characterized in that: The method comprises: Obtain production control signals; If the production control signal indicates that the first upstream sub-production line is connected to the third downstream sub-production line, and the second upstream sub-production line is connected to the second downstream sub-production line, the switching mechanism is controlled to be in the first state; If the production control signal indicates that the first upstream sub-production line is connected to the first downstream sub-production line, and the second upstream sub-production line is connected to the third downstream sub-production line, the switching mechanism is controlled to be in the second state; If the production control signal indicates that the first upstream sub-production line is connected to the first downstream sub-production line, and the second upstream sub-production line is connected to the second downstream sub-production line, the switching mechanism is controlled to be in the third state.