Dual-stand secondary cold rolling control system, method and device for speed distribution

Abstract

The present application discloses a dual-stand secondary cold rolling control system, method and device for speed distribution, including: a speed control module, wherein the speed control module is further configured to perform the following operations: based on the rolling relationship achieved by the first stand and the second stand, the dual-stand secondary cold rolling production line corresponding to the transmission mechanism is divided into multiple areas, wherein the rolling relationship is used to indicate the thickness relationship of the strip corresponding to each area; obtain speed distribution parameters, and determine the speed information of each area according to the speed distribution parameters; and distribute the speed to each area according to the determined speed information.

Description

[0001] This application claims priority based on an invention patent application filed with the Chinese Patent Office on May 22, 2024, with application number 202410640664.8 and invention name “A speed control method, device and medium for a double-stand secondary cold rolling mill”. This application is a cross-reference to the above Chinese patent application. Technical Field

[0002] The present application relates to the technical field of speed control of a processing line, and in particular to a control system, method and device for speed distribution. Background Art

[0003] In the production of strip steel or other metal strips, it is common practice to provide a continuously operating production line. The core of the strip production line is to control the speed of each area in the production line. Only by ensuring the stability of the speed of each area in the production line can the strip be further guaranteed to have a stable tension, thereby improving the working efficiency of the production line.

[0004] With regard to the technical problem existing in the above-mentioned prior art of how to ensure the speed stability of each area in the double-stand secondary cold rolling production line, thereby ensuring the stability of the tension and further improving the working efficiency of the double-stand secondary cold rolling production line, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present disclosure provide a dual-stand secondary cold rolling control system, method and device for speed distribution, so as to at least solve the technical problem existing in the prior art of how to ensure the stability of the speed of each area in the dual-stand secondary cold rolling production line, thereby ensuring the stability of the tension and further improving the working efficiency of the dual-stand secondary cold rolling production line.

[0006] According to one aspect of an embodiment of the present disclosure, a dual-stand secondary cold rolling control system for speed distribution is provided, comprising: a speed control module, and a transmission mechanism connected to the speed control module, wherein the transmission mechanism comprises a first frame and a second frame, and the first frame is close to the entrance side of the dual-stand secondary cold rolling production line, and the second frame is close to the exit side of the dual-stand secondary cold rolling production line, and the speed control module is further configured to perform the following operations: based on the rolling relationship achieved by the first frame and the second frame, the dual-stand secondary cold rolling production line corresponding to the transmission mechanism is divided into multiple areas, wherein the rolling relationship is used to indicate the thickness relationship of the strip corresponding to each area; a speed distribution parameter is obtained, and speed information of each area is determined according to the speed distribution parameter; and speed is respectively distributed to each area according to the determined speed information.

[0007] According to another aspect of an embodiment of the present disclosure, a dual-stand secondary cold rolling control method for speed distribution is also provided, comprising: based on the rolling relationship achieved by the first stand and the second stand, dividing the dual-stand secondary cold rolling production line corresponding to the transmission mechanism into multiple areas, wherein the rolling relationship is used to indicate the thickness relationship of the strip corresponding to each area; obtaining speed distribution parameters, and determining speed information of each area according to the speed distribution parameters; and respectively allocating speed to each area according to the determined speed information.

[0008] According to another aspect of an embodiment of the present disclosure, a storage medium is further provided, the storage medium including a stored program, wherein when the program is running, a processor executes any one of the methods described above.

[0009] According to another aspect of the embodiment of the present disclosure, a dual-stand secondary cold rolling control device for speed distribution is also provided, including: an area division module, which is used to divide the dual-stand secondary cold rolling mill production line corresponding to the transmission mechanism into multiple areas based on the rolling relationship achieved by the first frame and the second frame, wherein the rolling relationship is used to indicate the thickness relationship of the strip corresponding to each area; a speed information determination module, which is used to obtain speed distribution parameters and determine the speed information of each area according to the speed distribution parameters; and a speed distribution module, which is used to distribute speed to each area according to the determined speed information.

[0010] According to another aspect of the embodiment of the present disclosure, a dual-stand secondary cold rolling control device for speed distribution is also provided, including: a processor; and a memory, connected to the processor, for providing the processor with instructions for processing the following processing steps: based on the rolling relationship achieved by the first frame and the second frame, dividing the secondary cold rolling mill production line corresponding to the transmission mechanism into multiple areas, wherein the rolling relationship is used to indicate the thickness relationship of the strip corresponding to each area; obtaining speed distribution parameters, and determining the speed information of each area according to the speed distribution parameters; and respectively allocating speed to each area according to the determined speed information.

[0011] The present application provides a dual-stand secondary cold rolling control system for speed distribution. The system includes a speed control module, and firstly, the speed control module divides the dual-stand secondary cold rolling production line corresponding to the transmission mechanism into a plurality of regions based on the rolling relationship realized by the first frame and the second frame. Then, the speed control module obtains the speed distribution parameter, and determines the speed information of each region according to the speed distribution parameter. Finally, the speed control module allocates the speed to each region according to the determined speed information.

[0012] Since the speed stability of the double-stand secondary cold rolling production line affects the stability of the tension, if you want to ensure the stability of the tension, you need to ensure the speed stability of each area of ​​the double-stand secondary cold rolling production line. Furthermore, since the speed of conveying the strip is related to the thickness of the strip, the double-stand secondary cold rolling production line can be divided into multiple different areas according to the thickness of the strip in each area.

[0013] Therefore, under the above conditions, the technical solution disclosed in the present application divides the dual-stand secondary cold rolling production line into multiple areas based on the rolling relationship achieved by the first stand and the second stand. The rolling relationship is used to indicate the thickness relationship of the strip corresponding to each area. Therefore, the speed control module can allocate speed to each area based on the divided multiple areas and the speed allocation parameter.

[0014] Thus, the technical effect of ensuring the stability of the speed of each area in the double-stand secondary cold rolling production line and ensuring the stability of the tension can be achieved, thereby improving the working efficiency of the double-stand secondary cold rolling production line. Thus, the technical problem of how to ensure the stability of the speed of each area in the double-stand secondary cold rolling production line, thereby ensuring the stability of the tension, and thereby improving the working efficiency of the double-stand secondary cold rolling production line in the prior art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0016] Figure 1 is a hardware structure block diagram of a computing device for implementing the method according to Embodiment 1 of the present disclosure;

[0017] Figure 2 is a schematic diagram of a dual-stand secondary cold rolling control system for speed distribution according to Example 1 of the present application;

[0018] Figure 3 is a flow chart of the dual-stand secondary cold rolling control method for speed distribution according to Example 1 of the present application;

[0019] Figure 4 is a schematic diagram of tension control of an uncoiler or a coiler according to Example 1 of the present application;

[0020] Figure 5 is a diagram of a computing device structure of an unwinding machine according to Embodiment 1 of the present application;

[0021] Figure 6 is a schematic diagram of a dual-stand secondary cold rolling control device for speed distribution according to Example 2 of the present application;

[0022] Figure 7 It is a schematic diagram of a dual-stand secondary cold rolling control device for speed distribution according to Example 3 of the present application. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only embodiments of a part of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present disclosure.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0025] Example 1

[0026] According to this embodiment, a method embodiment of dual-stand secondary cold rolling control for speed distribution is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0027] The method embodiment provided in this embodiment can be executed in a mobile terminal, a computer terminal, a server or a similar computing device. Figure 1 The hardware structure block diagram of a computing device for a dual-stand secondary cold rolling control method for speed distribution is shown. Figure 1As shown, the computing device may include one or more processors (the processor may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory for storing data, a transmission device for communication functions, and an input / output interface. The memory, the transmission device, and the input / output interface are connected to the processor via a bus. In addition, it may also include: a display, a keyboard, and a cursor control device connected to the input / output interface. A person skilled in the art can understand that Figure 1 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations shown.

[0028] It should be noted that the one or more processors and / or other data processing circuits described above may generally be referred to herein as "data processing circuits". The data processing circuits may be embodied in whole or in part as software, hardware, firmware, or any other combination thereof. In addition, the data processing circuit may be a single independent processing module, or may be incorporated in whole or in part into any of the other components in the computing device. As involved in the embodiments of the present disclosure, the data processing circuit acts as a processor control (e.g., selection of a variable resistor terminal path connected to an interface).

[0029] The memory can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the dual-stand secondary cold rolling control method for speed distribution in the embodiment of the present disclosure. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory, that is, the dual-stand secondary cold rolling control method for speed distribution of the above-mentioned application program is realized. The memory may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include a memory remotely arranged relative to the processor, and these remote memories may be connected to the computing device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0030] The transmission device is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the computing device. In one example, the transmission device includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0031] The display may be, for example, a touch screen liquid crystal display (LCD) that may enable a user to interact with a user interface of the computing device.

[0032] It should be noted that, in some optional embodiments, the above Figure 1 The computing device shown may include hardware elements (including circuits), software elements (including computer code stored on a computer-readable medium), or a combination of both hardware elements and software elements. Figure 1 This is merely one example of a particular embodiment and is intended to illustrate the types of components that may be present in the computing devices described above.

[0033] Figure 2 Schematic diagram of a dual-stand secondary cold rolling control system for speed distribution according to Example 1 of the present application. Figure 2 As shown, the system includes: a transmission mechanism 20 and a speed control module 10. The transmission mechanism 20 is connected to the speed control module 10, and the speed control module 10 is used to allocate speeds to different areas of the double-stand secondary cold rolling production line.

[0034] The transmission mechanism 20 further includes an unwinder 230, a first roller group 250, a first frame 210, a second frame 220, a second roller group 260 and a coiler 240. The unwinder 230 is arranged near the entrance side of the double-frame secondary cold rolling production line. The first roller group 250 is arranged between the unwinder 230 and the first frame 210. The coiler 240 is arranged near the exit side of the double-frame secondary cold rolling production line. The second roller group 260 is arranged between the coiler 240 and the second frame 220.

[0035] And wherein, a first thickness gauge 310 is arranged between the first roller group 250 and the first frame 210. The first thickness gauge 310 is used to measure the first thickness information of the strip that has not been rolled by the first frame 210 and the second frame 220. A third thickness gauge 330 is arranged between the second roller group 260 and the second frame 220, wherein the third thickness gauge 330 is used to measure the second thickness information after being rolled by the first frame 210 and the second frame 220. A second thickness gauge 320 is also arranged between the first frame 210 and the second frame 220, wherein the second thickness gauge 320 is used to measure the third thickness information of the strip that has been rolled by the first frame 210 but not rolled by the second frame 220.

[0036] Under the above operating environment, according to the first aspect of this embodiment, a control method for speed distribution is provided, which comprises: Figure 2 The speed control module 10 shown in FIG. Figure 3 A schematic diagram showing the process of the method is shown in FIG. Figure 3 As shown, the method includes:

[0037] S302: dividing the double-stand secondary cold rolling production line corresponding to the transmission mechanism into a plurality of areas based on a rolling relationship achieved by the first stand and the second stand, wherein the rolling relationship is used to indicate a thickness relationship of the strip corresponding to each area;

[0038] S304: Obtain speed distribution parameters, and determine speed information of each area according to the speed distribution parameters; and

[0039] S306: Allocate speeds to the respective areas according to the determined speed information.

[0040] Specifically, first, the speed control module 10 divides the double-stand secondary cold rolling production line corresponding to the transmission mechanism 20 into a plurality of regions based on the rolling relationship realized by the first stand 210 and the second stand 220 (S302). The rolling relationship is used to indicate the thickness relationship of the strip corresponding to each region. And the strip may be, for example, a steel strip.

[0041] refer to Figure 2As shown, in the double-stand secondary cold rolling production line, the strip needs to be rolled by the first stand 210 and the second stand 220. However, the thickness of the strip that has not been rolled by the first stand 210 (i.e., the area between the unwinder 230 and the first stand 210 in the figure), the thickness of the strip when the first stand 210 is rolling (i.e., the area corresponding to the first stand 210 in the figure), the thickness of the strip that has only been rolled by the first stand 210 (i.e., the area between the first stand 210 and the second stand 220 in the figure), the thickness of the strip when the second stand 220 is rolling (i.e., the area corresponding to the second stand 220 in the figure), and the thickness of the strip after rolling by the first stand 210 and the second stand 220 are different (i.e., the area between the second stand 220 and the coiler 240 in the figure).

[0042] For example, the speed of the area corresponding to the strip that has not been rolled by the first stand 210 (i.e., the area between the unwinder 230 and the first stand 210 in the figure) needs to be lower than that of the area corresponding to the strip that has been rolled by the first stand 210 and the second stand 220 (i.e., the area between the second stand 220 and the coiler 240 in the figure). This ensures the stability of the tension of the strip in each area of ​​the dual-stand secondary cold rolling production line.

[0043] Therefore, the technical solution disclosed in the present application divides the double-stand secondary cold rolling production line into a plurality of different areas based on the thickness relationship of the strip in each area of ​​the double-stand secondary cold rolling production line.

[0044] For example, refer to Figure 2 As shown, the speed control module 10 divides the double-stand secondary cold rolling production line into five different areas based on the thickness relationship of the strip in each area of ​​the double-stand secondary cold rolling production line.

[0045] Further, the speed control module 10 obtains the speed distribution parameter, and determines the speed information of each area according to the speed distribution parameter (S304). For example, the speed control module 10 obtains the first thickness information of the strip between the uncoiler 230 and the first frame 210, the second thickness information of the strip between the coiler 240 and the second frame 220, the speed setting value corresponding to the outlet side, the third thickness information of the strip between the first frame 210 and the second frame 220, the first forward slip value information of the first frame 210, the second forward slip value information of the second frame 220, and the tension adjustment output between the first frame 210 and the second frame 220.

[0046] Then, the speed control module 10 determines the speed information of the area between the uncoiler 230 and the first frame 210 based on the first thickness information, the second thickness information and the speed setting value. The speed control module 10 determines the speed information of the area corresponding to the first frame 210 based on the second thickness information, the third thickness information, the first forward slip value information and the speed setting value. The speed control module 10 determines the speed information of the area between the first frame 210 and the second frame 220 based on the third thickness information, the second thickness information and the speed setting value. The speed control module 10 determines the speed information of the area corresponding to the second frame 220 based on the second forward slip value information, the tension adjustment output and the speed setting value. The speed control module 10 determines the speed information of the area between the second frame 220 and the coiler 240 based on the tension adjustment output and the speed setting value. The above content will be described in detail later, so it will not be repeated here.

[0047] Finally, the speed control module 10 allocates speeds to each area according to the determined speed information (S306). Figure 2 As shown, the speed control module 10 allocates speeds to the five different areas respectively when the speed information corresponding to the five different areas is determined.

[0048] As described in the background technology, in the production of strip steel or other metal strips, it is common practice to provide a continuously operating production line. The core of the strip production line is to control the speed of each area in the production line. Only by ensuring the stability of the speed of each area in the production line can the strip be further guaranteed to have a stable tension, thereby improving the working efficiency of the production line.

[0049] In view of this, the present application provides a dual-stand secondary cold rolling control system for speed distribution. And because the speed stability of the dual-stand secondary cold rolling production line affects the stability of the tension, if the tension stability is to be ensured, the speed stability of each area of ​​the dual-stand secondary cold rolling production line needs to be ensured. Furthermore, because the speed of conveying the strip is related to the thickness of the strip, the dual-stand secondary cold rolling production line can be divided into multiple different areas according to the thickness of the strip in each area.

[0050] Therefore, under the above conditions, the technical solution disclosed in the present application divides the dual-stand secondary cold rolling production line into multiple areas based on the rolling relationship achieved by the first stand 210 and the second stand 220. The rolling relationship is used to indicate the thickness relationship of the strip corresponding to each area. Therefore, the speed control module 10 can allocate speed to each area based on the divided multiple areas and the speed allocation parameter.

[0051] Thus, the technical effect of ensuring the stability of the speed of each area in the double-stand secondary cold rolling production line and ensuring the stability of the tension can be achieved, thereby improving the working efficiency of the double-stand secondary cold rolling production line. Thus, the technical problem of how to ensure the stability of the speed of each area in the double-stand secondary cold rolling production line, thereby ensuring the stability of the tension, and thereby improving the working efficiency of the double-stand secondary cold rolling production line in the prior art is solved.

[0052] Optionally, the transmission mechanism also includes: a uncoiler and a coiler, wherein the uncoiler is closer to the entrance side of the dual-stand secondary cold rolling production line relative to the first frame, and the coiler is closer to the exit side of the dual-stand secondary cold rolling production line relative to the second frame, and the speed distribution parameters are obtained, and the speed information of each area is determined according to the speed distribution parameters, including: determining the first thickness information of the strip between the uncoiler and the first frame; determining the second thickness information of the strip between the coiler and the second frame; determining the speed setting value corresponding to the exit side; and determining the speed information of the area between the uncoiler and the first frame based on the first thickness information, the second thickness information and the speed setting value.

[0053] Specifically, refer to Figure 2 As shown, for the area between the uncoiler 230 and the first frame 210, the overall rolling rate of the first frame 210 and the second frame 220 needs to be considered. Therefore, firstly, the speed control module 10 determines the first thickness information H of the strip between the uncoiler 230 and the first frame 210. N , the second thickness information H of the strip between the coiler 240 and the second stand 220 X And the speed setting value V corresponding to the outlet side. Among them, the first thickness information H of the strip between the uncoiler 230 and the first frame 210 N The second thickness information H of the strip between the coiler 240 and the second stand 220 may be determined by the first thickness gauge 310 disposed between the first roller set 250 and the first stand 210. X It can be determined by the third thickness gauge 330 disposed between the second frame 220 and the second roller set 260. The speed setting value V corresponding to the outlet side is a value preset by the operator.

[0054] Thus, the speed control module 10 can calculate the speed information V1 corresponding to the area between the uncoiler 230 and the first frame 210 based on the following formula:

[0055]

[0056] Thus, the speed control module 10 may distribute the speed for the area between the uncoiler 230 and the first frame 210 based on the calculated speed information V1 corresponding to the area between the uncoiler 230 and the first frame 210 .

[0057] Optionally, the operation of obtaining the speed distribution parameters and determining the speed information of each area according to the speed distribution parameters includes: determining the third thickness information of the strip between the first frame and the second frame; determining the first forward slip value information of the first frame; and determining the speed information of the area corresponding to the first frame based on the second thickness information, the third thickness information, the first forward slip value information and the speed setting value.

[0058] Specifically, refer to Figure 2 As shown, for the area corresponding to the first frame 210, the rolling rate of the second frame 220 and the forward slip rate of the first frame 210 need to be considered. Thus, firstly, the speed control module 10 determines the second thickness information H of the strip between the coiler 240 and the second frame 220. X , the third thickness information H of the strip between the first frame 210 and the second frame 220 I , the first forward slip value information SL1 of the first rack 210 and the speed setting value V corresponding to the outlet side. Among them, the third thickness information H of the strip between the first rack 210 and the second rack 220 I It can be determined by the second thickness gauge 320 disposed between the first frame 210 and the second frame 220. The first forward slip value information SL1 of the first frame 210 is a calculated value. When the strip is rolled through the first frame 210, the speed of the strip at the exit of the roller of the first frame 210 will be faster than the linear speed of the roller, so that the first forward slip value information SL1 can be calculated when the speed of the strip and the linear speed of the roller are known. The second forward slip value information SL2 can also be calculated in the above manner.

[0059] Thus, the speed control module 10 can calculate the speed information V2 of the area corresponding to the first rack 210 based on the following formula:

[0060]

[0061] Thus, the speed control module 10 may distribute the speed for the area corresponding to the first rack 210 based on the calculated speed information V2 of the area corresponding to the first rack 210 .

[0062] Optionally, the operation of determining the speed information of each area according to the speed distribution parameter includes: determining the speed information of the area between the first rack and the second rack based on the third thickness information, the second thickness information and the speed setting value.

[0063] Specifically, refer to Figure 2As shown, for the area between the first frame 210 and the second frame 220, the rolling rate of the second frame 220 needs to be considered. Therefore, firstly, the speed control module 10 determines the third thickness information H of the strip between the first frame 210 and the second frame 220. I , the second thickness information H of the strip between the coiler 240 and the second stand 220 X And the speed setting value V corresponding to the outlet side.

[0064] Thus, the speed control module 10 can calculate the speed information V3 of the area between the first rack 210 and the second rack 220 based on the following formula:

[0065]

[0066] Thus, the speed control module 10 may perform speed distribution for the area between the first rack 210 and the second rack 220 based on the calculated speed information V3 of the area between the first rack 210 and the second rack 220 .

[0067] Optionally, the operation of obtaining speed distribution parameters and determining speed information of each area according to the speed distribution parameters includes: determining second forward slip value information of the second rack; determining the tension adjustment output between the first rack and the second rack; and determining the speed information of the area corresponding to the second rack based on the second forward slip value information, the tension adjustment output and the speed setting value.

[0068] Specifically, refer to Figure 2 As shown, for the area corresponding to the second rack 220, the forward slip rate of the second rack 220 and the tension adjustment amount between the first rack 210 and the second rack 220 need to be considered. Thus, firstly, the speed control module 10 determines the second forward slip value information SL2 of the second rack 220 and the tension adjustment output amount V between the first rack 210 and the second rack 220. ITC The second forward sliding value information SL2 of the second frame 220 is a calculated value. The tension adjustment output V between the first frame 210 and the second frame 220 ITCis the actual adjustment value set in advance. It is worth noting that the tension of the strip between the first frame 210 and the second frame 220 is achieved by adjusting the speed of the first frame 210 and the second frame 220. When the speed of the first frame 210 and the second frame 220 is faster, the strip is pulled tighter and the tension of the strip is greater; when the speed of the first frame 210 and the second frame 220 is slower, the strip is pulled looser and the tension of the strip is smaller. Therefore, the speed output of the first frame 210 and the second frame 220 affects the tension of the strip between the first frame 210 and the second frame 220. That is, by adjusting the speed output of the first frame 210 and the second frame 220, the tension of the strip can be adjusted. Therefore, the above-mentioned tension adjustment output V ITC It is used to indicate the speed output after the speed of the first rack 210 and the second rack 220 is adjusted.

[0069] Thus, the speed control module 10 can calculate the speed information V4 of the area between the first rack 210 and the second rack 220 based on the following formula:

[0070]

[0071] Thus, the speed control module 10 may perform speed distribution for the area between the first rack 210 and the second rack 220 based on the calculated speed information of the area between the first rack 210 and the second rack 220 .

[0072] Optionally, the operation of determining the speed information of each area according to the speed distribution parameter includes: determining the speed information of the area between the second frame and the winder based on the tension adjustment output and the speed setting value.

[0073] Specifically, refer to Figure 2 As shown, for the area between the second frame 220 and the coiler 240, the tension adjustment amount between the first frame 210 and the second frame 220 needs to be considered. Thus, firstly, the speed control module 10 determines the speed setting value V corresponding to the outlet side and the tension adjustment output V between the first frame 210 and the second frame 220. ITC .

[0074] Thus, the speed control module 10 can calculate the speed information V5 of the area between the second frame 220 and the coiler 240 based on the following formula:

[0075]

[0076] Thus, the speed control module 10 can calculate the speed information of the area between the second frame 220 and the coiler 240 based on the following formula: , speed distribution is performed for the area between the second frame 220 and the coiler 240.

[0077] Optionally, it also includes: a first thickness gauge, a second thickness gauge and a third thickness gauge, wherein the first thickness gauge is arranged between the uncoiler and the first frame, and is configured to measure the first thickness information of the strip; the second thickness gauge is arranged between the first frame and the second frame, and is configured to measure the third thickness information of the strip; and the third thickness gauge is arranged between the second frame and the coiler, and is configured to measure the second thickness information of the strip.

[0078] Therefore, according to the first aspect of this embodiment, the technical effect of ensuring the stability of the speed of each area in the double-stand secondary cold rolling production line and ensuring the stability of the tension can be achieved, thereby improving the working efficiency of the double-stand secondary cold rolling production line.

[0079] In addition, the present application also provides a method for controlling the tension of the uncoiler 230 and the coiler 240 .

[0080] The tension control of the uncoiler 230 and the coiler 240 can be divided into direct tension control and indirect tension control. Direct tension control is to use a tension meter to directly measure the tension value, and send it to the system through a tension controller for closed-loop control. Indirect tension control requires calculating the set value of the torque from the measured coil diameter and the set value of the strip tension, so as to achieve the purpose of controlling the tension.

[0081] Figure 4 Schematic diagram of tension control of an unwinder or a coiler according to Embodiment 1 of the present application. Figure 4 As shown, the speed control module 10 in the present application is based on the indirect tension control principle (i.e., torque limit control). When the tension is established during normal winding (or unwinding) operation, the speed control module 10 will always superimpose an offset speed on the basis of the line speed, which will make the speed regulator always in a saturated state. Among them, the speed regulator is connected to the winder 240 or the unwinder 230. And the torque setting output by the speed regulator will continue to rise until it reaches the torque limit value. Therefore, the accurate calculation of the torque limit value has a direct impact on the overall control effect.

[0082] And the components of the moment can include tension moment M f , acceleration torque M a And the friction torque Taking the uncoiler 230 as an example, the tension torque of the uncoiler 230 is M f It can be calculated by the following formula:

[0083]

[0084] Wherein, F represents actual tension, D represents actual coil diameter of the uncoiler 230 , and i represents the reduction ratio of the uncoiler 230 .

[0085] Acceleration torque of uncoiler 230 M a It can be calculated by the following formula:

[0086]

[0087] Wherein, J represents the moment of inertia of the uncoiler 230, represents the acceleration of the uncoiler 230 .

[0088] Friction torque M b It can be measured during no-load testing, and a set of torque values ​​can be obtained according to the motor running at different speeds. In order to ensure that the tension of unwinding and winding is controlled within a constant range, the torque limit value of the unwinder 230 must be calculated according to the following formula:

[0089]

[0090] Thus, the torque limit value of the uncoiler 230 is The accuracy of the torque limit determines the accuracy of the actual tension conversion. The accurate compensation of the torque loss during on-site commissioning is directly related to the control accuracy of the actual strip tension. The calculation method of is the same as the calculation method of the torque limit value of the uncoiler 230 mentioned above, so it will not be repeated here.

[0091] Thus, referring to the above formula, the tension moment of the unwinder 230 or the coiler 240 is M f Therefore, the accuracy of the actual coil diameter of the unwinder 230 and the coiler 240 affects the tension torque of the unwinder 230 and the coiler 240. M f accuracy.

[0092] Therefore, since the coil diameter of the uncoiler 230 and the coiler 240 has a direct impact on the uncoil speed and coiling speed, torque calculation and strip length calculation, the accuracy of the coil diameter calculation of the uncoiler 230 and the coiler 240 is particularly important for the control accuracy of uncoil and coiling. Furthermore, since the thickness of the strip in the double-stand secondary cold rolling production line is relatively thin, it becomes particularly important to use which calculation method to calculate the coil diameter of the uncoiler 230 and the coiler 240.

[0093] The general method for calculating the coil diameter of the unwinder 230 and the coiler 240 includes:

[0094] 1. The coil diameter calculation method based on the strip length, where the length is calculated from the encoder values ​​on the motors of the unwinder 230 and the coiler 240 and the encoder values ​​on the motor of the measuring roller 270;

[0095] 2. A coil diameter calculation method based on the actual linear speeds of the uncoiler 230, the coiler 240 and the measuring roller 270;

[0096] 3. Calculation method of coil diameter based on given line speed.

[0097] Both the above-mentioned methods 2 and 3 have relatively high requirements on the initial coil diameters of the uncoiler 230 and the coiler 240, and cannot automatically correct the coil diameter calculation deviation caused by the sudden change in speed, thus leading to a series of problems in the double-stand secondary cold rolling production line.

[0098] At present, the coil diameter calculation method commonly used in the double-stand secondary cold rolling production line is to use the coil diameter calculation method based on the strip length, and the encoder value on the motor of the unwinder 230 and the motor of the coiler 240 and the encoder signal on the motor of the measuring roller 270 are used as the basis for calculation. By comparing the roller diameter of the measuring roller 270, the outer diameter of the steel coil can be calculated very accurately. Among them, the transmission mechanism 20 provided in the present application includes the measuring roller 270.

[0099] Figure 5 2 is a diagram of a computing device structure of the uncoiler 230 according to Embodiment 1 of the present application. Figure 5 As shown, taking the uncoiler 230 as an example, in one measurement cycle, the speed control module 10 reads the number of pulses in the high-speed counting template for the uncoiler 230 and the measuring roller 270. The actual coil diameter of the uncoiler 230 is calculated according to the following formula:

[0100]

[0101] in, Indicates the cumulative amount of pulsation of the unwinder within 230 unit time. Indicates the cumulative amount of pulsation of the measuring roller 270 per unit time, Indicates the reduction ratio of the uncoiler 230, represents the reduction ratio of the measuring roller 270, Indicates the actual coil diameter of the uncoiler 230, Indicates the actual winding diameter of the measuring roller 270.

[0102] The calculation of the coiler 240 is the same as the above formula, so it will not be repeated here.

[0103] In addition, in order to reduce the sudden change of the coil diameter of the unwinder 230 or the coiler 240, during the coil diameter calculation process of the unwinder 230 or the coiler 240, the coil diameter of the unwinder 230 and the coiler 240 will be corrected and averaged after each measurement cycle. Then, the coil diameters of the previous and next several measurement cycles will be linearized. This function also provides an accurate control data source for automatic positioning parking and trolley action.

[0104] In addition, reference Figure 1 As shown, according to the second aspect of this embodiment, a storage medium is provided, wherein the storage medium includes a stored program, wherein when the program is run, a processor executes any one of the above methods.

[0105] Therefore, according to this embodiment, the technical effect of ensuring the stability of the speed of each area in the double-stand secondary cold rolling production line and ensuring the stability of the tension can be achieved, thereby improving the working efficiency of the double-stand secondary cold rolling production line.

[0106] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0107] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0108] Example 2

[0109] Figure 6 A dual-stand secondary cold rolling control device 600 for speed distribution according to this embodiment is shown, and the device 600 corresponds to the method according to embodiment 1. Figure 6As shown, the device 600 includes: an area division module 610, which is used to divide the secondary cold rolling mill production line corresponding to the transmission mechanism into multiple areas based on the rolling relationship achieved by the first frame and the second frame, wherein the rolling relationship is used to indicate the thickness relationship of the strip corresponding to each area; a speed information determination module 620, which is used to obtain speed distribution parameters and determine the speed information of each area according to the speed distribution parameters; and a speed distribution module 630, which is used to distribute speed to each area according to the determined speed information.

[0110] Optionally, the speed information determination module 620 includes: a first thickness information determination module, used to determine the first thickness information of the strip between the uncoiler and the first frame; a second thickness information determination module, used to determine the second thickness information of the strip between the coiler and the second frame; a speed setting value determination module, used to determine the speed setting value corresponding to the outlet side; and a first speed information determination module, used to determine the speed information of the area between the uncoiler and the first frame based on the first thickness information, the second thickness information and the speed setting value.

[0111] Optionally, the speed information determination module 620 includes: a third thickness information determination module, used to determine the third thickness information of the strip between the first frame and the second frame; a first forward slip value information determination module, used to determine the first forward slip value information of the first frame; and a second speed information determination module, used to determine the speed information of the area corresponding to the first frame based on the second thickness information, the third thickness information, the first forward slip value information and the speed setting value.

[0112] Optionally, the speed information determining module 620 includes: a third speed information determining module, configured to determine speed information of a region between the first rack and the second rack based on the third thickness information, the second thickness information and the speed setting value.

[0113] Optionally, the speed information determination module 620 includes: a second forward slip value information determination module, used to determine the second forward slip value information of the second frame; a tension adjustment output determination module, used to determine the tension adjustment output between the first frame and the second frame; and a fourth speed information determination module, used to determine the speed information of the area corresponding to the second frame based on the second forward slip value information, the tension adjustment output and the speed setting value.

[0114] Optionally, the speed information determination module 620 includes: a fifth speed information determination module, configured to determine speed information of the area between the second frame and the winder based on the tension adjustment output and the speed setting value.

[0115] Optionally, the device 600 further includes: a first thickness information measuring module for measuring first thickness information of the strip; a third thickness information measuring module for measuring third thickness information of the strip; and a second subsequent information measuring module for measuring second thickness information of the strip.

[0116] Therefore, according to this embodiment, the technical effect of ensuring the stability of the speed of each area in the double-stand secondary cold rolling production line and ensuring the stability of the tension can be achieved, thereby improving the working efficiency of the double-stand secondary cold rolling production line.

[0117] Example 3

[0118] Figure 7 FIG. 7 shows a dual-stand secondary cold rolling control device 700 for speed distribution according to this embodiment, which corresponds to the method according to Embodiment 1. Figure 7 As shown, the device 700 includes: a processor 710; and a memory 720, which is connected to the processor 710 and is used to provide the processor 710 with instructions for processing the following processing steps: based on the rolling relationship between the first frame and the second frame, the secondary cold rolling mill production line corresponding to the transmission mechanism is divided into multiple areas, wherein the rolling relationship is used to indicate the thickness relationship of the strip corresponding to each area; obtain speed distribution parameters, and determine the speed information of each area according to the speed distribution parameters; and allocate speed to each area according to the determined speed information.

[0119] Optionally, the operation of obtaining speed distribution parameters and determining speed information of each area based on the speed distribution parameters includes: determining first thickness information of the strip between the uncoiler and the first frame; determining second thickness information of the strip between the coiler and the second frame; determining a speed setting value corresponding to the outlet side; and determining speed information of the area between the uncoiler and the first frame based on the first thickness information, the second thickness information and the speed setting value.

[0120] Optionally, the operation of obtaining the speed distribution parameters and determining the speed information of each area according to the speed distribution parameters includes: determining the third thickness information of the strip between the first frame and the second frame; determining the first forward slip value information of the first frame; and determining the speed information of the area corresponding to the first frame based on the second thickness information, the third thickness information, the first forward slip value information and the speed setting value.

[0121] Optionally, the operation of determining the speed information of each area according to the speed distribution parameter includes: determining the speed information of the area between the first rack and the second rack based on the third thickness information, the second thickness information and the speed setting value.

[0122] Optionally, the operation of obtaining speed distribution parameters and determining speed information of each area according to the speed distribution parameters includes: determining second forward slip value information of the second rack; determining the tension adjustment output between the first rack and the second rack; and determining the speed information of the area corresponding to the second rack based on the second forward slip value information, the tension adjustment output and the speed setting value.

[0123] Optionally, the operation of determining the speed information of each area according to the speed distribution parameter includes: determining the speed information of the area between the second frame and the winder based on the tension adjustment output and the speed setting value.

[0124] Optionally, the device 700 also includes: a first thickness gauge, a second thickness gauge and a third thickness gauge, wherein the first thickness gauge is arranged between the uncoiler and the first frame, and is configured to measure the first thickness information of the strip; the second thickness gauge is arranged between the first frame and the second frame, and is configured to measure the third thickness information of the strip; and the third thickness gauge is arranged between the second frame and the coiler, and is configured to measure the second thickness information of the strip.

[0125] Therefore, according to this embodiment, the technical effect of ensuring the stability of the speed of each area in the double-stand secondary cold rolling production line and ensuring the stability of the tension can be achieved, thereby improving the working efficiency of the double-stand secondary cold rolling production line.

[0126] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0127] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0128] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, 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 through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0129] 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.

[0130] In addition, each functional unit in each embodiment of the present invention 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.

[0131] 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 invention, in essence, 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. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0132] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A dual-stand secondary cold rolling control system for speed distribution, comprising: A speed control module, and a transmission mechanism connected to the speed control module, wherein the transmission mechanism includes a first frame and a second frame, and the first frame is close to the entrance side of the double-frame secondary cold rolling production line, and the second frame is close to the exit side of the double-frame secondary cold rolling production line, characterized in that the speed control module is also configured to perform the following operations: Based on the rolling relationship achieved by the first frame and the second frame, the double-frame secondary cold rolling production line corresponding to the transmission mechanism is divided into a plurality of areas, wherein the rolling relationship is used to indicate the thickness relationship of the strip corresponding to each area; Acquiring speed distribution parameters, and determining speed information of each area according to the speed distribution parameters; and According to the determined speed information, speeds are allocated to the respective areas, wherein The transmission mechanism further includes: a coiler, wherein the coiler is closer to the exit side of the double-stand secondary cold rolling production line relative to the second stand, and is characterized in that the operation of obtaining speed distribution parameters and determining the speed information of each area according to the speed distribution parameters includes: Determining second thickness information of the strip between the coiler and the second stand; determining a speed setting corresponding to the outlet side; Determining third thickness information of the strip between the first frame and the second frame; Determining first forward sliding value information of the first rack; and Based on the second thickness information, the third thickness information, the first forward slip value information and the speed setting value, the speed information of the area corresponding to the first rack is determined, wherein The transmission mechanism further includes: a decoiler, wherein the decoiler is closer to the entrance side of the double-stand secondary cold rolling production line relative to the first stand, and is characterized in that the operation of obtaining speed distribution parameters and determining the speed information of each area according to the speed distribution parameters includes: determining first thickness information of the strip between the uncoiler and the first stand; and Based on the first thickness information, the second thickness information, and the speed setting value, speed information of a region between the uncoiler and the first frame is determined.

2. The system according to claim 1, characterized in that The operation of determining the speed information of each area according to the speed distribution parameter includes: Based on the third thickness information, the second thickness information and the speed setting value, speed information of the area between the first rack and the second rack is determined, wherein The operation of obtaining speed distribution parameters and determining speed information of each area according to the speed distribution parameters further includes: Determining second forward sliding value information of the second rack; determining a tension adjustment output between the first frame and the second frame; and Based on the second forward slip value information, the tension adjustment output, and the speed setting value, speed information of a region corresponding to the second frame is determined.

3. The system according to claim 2, characterized in that The operation of determining the speed information of each area according to the speed distribution parameter includes: Based on the tension adjustment output and the speed setting value, speed information of a region between the second frame and the winder is determined.

4. The system according to claim 3, characterized in that Also includes: A first thickness gauge, a second thickness gauge and a third thickness gauge, wherein The first thickness gauge is disposed between the uncoiler and the first frame, and is configured to measure first thickness information of the strip; The second thickness gauge is disposed between the first frame and the second frame, and is configured to measure third thickness information of the strip; as well as The third thickness gauge is disposed between the second frame and the coiler, and is configured to measure second thickness information of the strip.

5. A control method for speed distribution, characterized in that: include: Based on the rolling relationship achieved by the first frame and the second frame, the double-frame secondary cold rolling production line corresponding to the transmission mechanism is divided into a plurality of areas, wherein the rolling relationship is used to indicate the thickness relationship of the strip corresponding to each area; Acquiring speed distribution parameters, and determining speed information of each area according to the speed distribution parameters; as well as According to the determined speed information, speeds are allocated to the respective areas, wherein The transmission mechanism further includes: a coiler, wherein the coiler is closer to the exit side of the double-stand secondary cold rolling production line relative to the second stand, and is characterized in that the operation of obtaining speed distribution parameters and determining the speed information of each area according to the speed distribution parameters includes: Determining second thickness information of the strip between the coiler and the second stand; determining a speed setting corresponding to the outlet side; Determining third thickness information of the strip between the first frame and the second frame; Determining first forward sliding value information of the first rack; and Based on the second thickness information, the third thickness information, the first forward slip value information and the speed setting value, the speed information of the area corresponding to the first rack is determined, wherein The transmission mechanism further includes: a decoiler, wherein the decoiler is closer to the entrance side of the double-stand secondary cold rolling production line relative to the first stand, and is characterized in that the operation of obtaining speed distribution parameters and determining the speed information of each area according to the speed distribution parameters includes: determining first thickness information of the strip between the uncoiler and the first stand; and Based on the first thickness information, the second thickness information, and the speed setting value, speed information of a region between the uncoiler and the first frame is determined.

6. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the method of claim 5 is executed by a processor.

7. A dual-stand secondary cold rolling control device for speed distribution, characterized in that: include: A region division module, for dividing a double-stand secondary cold rolling mill production line corresponding to the transmission mechanism into a plurality of regions based on a rolling relationship achieved by the first stand and the second stand, wherein the rolling relationship is used to indicate a thickness relationship of a strip corresponding to each region; A speed information determination module, used to obtain speed distribution parameters and determine the speed information of each area according to the speed distribution parameters; as well as A speed distribution module is used to distribute speeds to each area according to the determined speed information, wherein The transmission mechanism further includes: a coiler, wherein the coiler is closer to the exit side of the double-stand secondary cold rolling production line relative to the second stand, and is characterized in that the speed information determination module includes: A second thickness information determination module, used to determine second thickness information of the strip between the coiler and the second frame; A speed setting value determination module, used to determine a speed setting value corresponding to the outlet side; A third thickness information determining module, used to determine third thickness information of the strip between the first rack and the second rack; A first forward slip value information determining module, configured to determine first forward slip value information of the first rack; and A second speed information determination module is used to determine the speed information of the area corresponding to the first frame based on the second thickness information, the third thickness information, the first forward slip value information and the speed setting value, wherein The speed information determination module includes: a first thickness information determination module, used to determine first thickness information of the strip between the uncoiler and the first frame; and The first speed information determining module is used to determine the speed information of the area between the uncoiler and the first frame based on the first thickness information, the second thickness information and the speed setting value.

8. A dual-stand secondary cold rolling control device for speed distribution, characterized in that: include: processor; as well as A memory, connected to the processor, configured to provide the processor with instructions for processing the following processing steps: Based on the rolling relationship between the first frame and the second frame, the secondary cold rolling mill production line corresponding to the transmission mechanism is divided into a plurality of areas, wherein the rolling relationship is used to indicate the thickness relationship of the strip corresponding to each area; Acquiring speed distribution parameters, and determining speed information of each area according to the speed distribution parameters; as well as According to the determined speed information, speeds are allocated to the respective areas, wherein The transmission mechanism further includes: a coiler, wherein the coiler is closer to the exit side of the double-stand secondary cold rolling production line relative to the second stand, and is characterized in that the operation of obtaining speed distribution parameters and determining the speed information of each area according to the speed distribution parameters includes: Determining second thickness information of the strip between the coiler and the second stand; determining a speed setting corresponding to the outlet side; Determining third thickness information of the strip between the first frame and the second frame; Determining first forward sliding value information of the first rack; and Based on the second thickness information, the third thickness information, the first forward slip value information and the speed setting value, the speed information of the area corresponding to the first rack is determined, wherein The transmission mechanism further includes: a decoiler, wherein the decoiler is closer to the entrance side of the double-stand secondary cold rolling production line relative to the first stand, and is characterized in that the operation of obtaining speed distribution parameters and determining the speed information of each area according to the speed distribution parameters includes: determining first thickness information of the strip between the uncoiler and the first stand; and Based on the first thickness information, the second thickness information, and the speed setting value, speed information of a region between the uncoiler and the first frame is determined.

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