Roll changing method, device and equipment of cold continuous rolling unit and medium
By controlling the supply and flow of emulsion when the cold rolling mill is stopped, the problem of emulsion splashing during roller replacement is solved, and cost savings are achieved.
Patent Information
- Application Number
- CN202510687403.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-27
- Publication Date
- 2025-08-08
AI Technical Summary
During the cold rolling process, the emulsion splashes during roll change, resulting in the loss of emulsion, increasing production costs.
After receiving the stop command, the rolling mill speed and rolling force are controlled to be reduced to the minimum value, the emulsion supply from the roll change mill supply pump is stopped, the emulsion flow is obtained, the flow is controlled to be less than the threshold value and the roll-slit operation is performed, and the roll-changing operation is finally performed.
Reduce the splash of the emulsion and save production costs.
Smart Images
Figure CN120438408A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of metallurgy technology, and in particular to a roll changing method, device, equipment and medium for a cold rolling mill. Background Art
[0002] During the cold rolling process, the pickling mill, as the first step in the process, has a processing cost that directly impacts a company's profitability and market competitiveness. Energy consumption in the tandem mill is a significant component of cold rolling costs. Tandem mills utilize emulsions for process lubrication and cooling. To meet the demands of daily rolling processes, the emulsion supply equipment features high flow rates, multiple nozzles, and complex piping.
[0003] In the prior art, the rolls of a continuous rolling mill need to be replaced when the rolling tonnage is reached, there are quality problems, the specifications change, or the process requirements change. New rolls are replaced and rolling is continued to ensure that the rolled strip meets the requirements.
[0004] However, when changing the rolls, the emulsion will splash, resulting in emulsion loss. Therefore, how to reduce the emulsion splashing during the roll changing process is a technical problem that needs to be solved urgently. Summary of the Invention
[0005] In view of the above problems, the present application is proposed to provide a roll changing method, device, equipment and medium for a cold rolling mill that solves the above problems. When the cold rolling mill is controlled to stop, the supply pump corresponding to the rolling mill to be changed can also be controlled to stop providing emulsion, thereby reducing the emulsion splashing during the roll changing process, thereby reducing the consumption of emulsion and saving production costs.
[0006] In a first aspect, the present application provides a roll changing method for a cold rolling mill, wherein the cold rolling mill includes a plurality of rolling mills and a plurality of supply pumps, each supply pump being used to supply emulsion to at least one rolling mill, the method comprising:
[0007] After receiving the stop instruction, controlling the operating speed of the multiple rolling mills to drop to 0 and the rolling force to drop to a preset minimum rolling force, and controlling the first target supply pump to stop running, the first target supply pump being the supply pump corresponding to the roll changing mill among the multiple rolling mills, the roll changing mill being the rolling mill that needs to have its rolls replaced;
[0008] Obtain the emulsion flow rate of each roll-changing mill;
[0009] Controlling the roll-changing mill to open the roll gap when the emulsion flow rate is less than a preset first flow rate threshold;
[0010] After the roll gap opening operation is completed, the roll changing operation is performed.
[0011] Optionally, controlling the first target supply pump to stop operation includes:
[0012] If the number of the first target supply pumps is greater than 1, and there is a preset second target supply pump among all the first target supply pumps, then after controlling the second target supply pumps to stop running, the third target supply pump is controlled to stop running;
[0013] The rolling mill corresponding to the second target supply pump is arranged first and / or last in the order of all rolling mills, and the third target supply pump is the first target supply pump among all the first target supply pumps except the second target supply pump.
[0014] Optionally, controlling the first target supply pump to stop operation includes:
[0015] If the number of the first target supply pumps is equal to 1, the first target supply pump is controlled to stop operating.
[0016] Optionally, the step of controlling the roll-changing mill to open the roll gap when the emulsion flow rate is less than a preset first flow rate threshold comprises:
[0017] If there is a preset first target rolling mill among all roll-changing rolling mills, and the first emulsion flow rate of the first target rolling mill is less than a preset first flow rate threshold, then after controlling the first target rolling mill to perform a roll gap opening operation, if the second emulsion flow rate of the second target rolling mill is less than the first flow rate threshold, then controlling the second target rolling mill to perform a roll gap opening operation;
[0018] The first target rolling mill is neither the first nor the last in the arrangement order of all rolling mills, and the second target rolling mill is the roll-changing rolling mill other than the first target rolling mill among all the roll-changing rolling mills.
[0019] Optionally, the step of controlling the roll-changing mill to open the roll gap when the emulsion flow rate is less than a preset first flow rate threshold comprises:
[0020] If the first target rolling mill is not present among all the roll-changing rolling mills, the roll-changing rolling mills having the emulsion flow rate less than the first flow rate threshold are controlled to perform a roll gap opening operation.
[0021] Optionally, after the roll gap opening operation is completed and the roll changing operation is performed, the method further includes:
[0022] After the roll changing operations of all roll changing mills are completed, the first target supply pump is controlled to start running, and after the emulsion flow rate is greater than the preset second flow rate threshold, the operating speed of the multiple rolling mills is controlled to increase to the preset target speed and the rolling force is controlled to increase to the preset target rolling force.
[0023] Optionally, the step of controlling the roll-changing mill to open the roll gap when the emulsion flow rate is less than a preset first flow rate threshold comprises:
[0024] If the number of the first roll-changing mills is greater than a preset number threshold, only the first roll-changing mills with the threshold number are controlled to perform the roll gap opening operation each time until all the first roll-changing mills have completed the roll gap opening operation;
[0025] If the number of the first roll-changing rolling mills is less than or equal to the number threshold, controlling all the first roll-changing rolling mills to perform the roll gap opening operation;
[0026] Wherein, the first roll-changing mill is a roll-changing mill in which the emulsion flow rate is less than a preset first flow rate threshold.
[0027] In a second aspect, the present application provides a roll changing device for a cold rolling mill, wherein the cold rolling mill includes a plurality of rolling mills and a plurality of supply pumps, each supply pump being used to supply emulsion to at least one rolling mill, and the device includes:
[0028] a first control module, configured to, upon receiving a stop instruction, control the operating speeds of the plurality of rolling mills to decrease to 0 and the rolling force to decrease to a preset minimum rolling force, and control a first target supply pump to stop operating, wherein the first target supply pump is a supply pump corresponding to a roll-changing mill among the plurality of rolling mills, and the roll-changing mill is a rolling mill that needs to have its rolls replaced;
[0029] An acquisition module, used for acquiring the emulsion flow rate of each roll-changing mill;
[0030] a second control module, configured to control the roll-changing mill to perform a roll-gap opening operation when the emulsion flow rate is less than a preset first flow rate threshold;
[0031] The roll changing module is used to perform the roll changing operation after the roll gap opening operation is completed.
[0032] In a third aspect, the present application provides an electronic device comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes the method described in the first aspect by executing the computer instructions.
[0033] In a fourth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the method described in the first aspect.
[0034] The technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:
[0035] The embodiment of the present application provides a roll changing method, device, equipment and medium for a cold rolling mill group. After receiving a stop command, the method, device, equipment and medium can control the operating speed of multiple rolling mills to drop to 0 and the rolling force to drop to a preset minimum rolling force to stop the mill, and control the first target supply pump to stop running and stop supplying emulsion to the roll changing mill. The first target supply pump is the supply pump corresponding to the roll changing mill among the multiple rolling mills, and the roll changing mill is the mill that needs to replace the rolls; the emulsion flow rate of each roll changing mill is obtained to understand the emulsion disappearance situation; the roll changing mill with an emulsion flow rate less than a preset first flow rate threshold is controlled to perform a roll opening operation, that is, the roll changing mill with no emulsion is subjected to a roll opening operation; after the roll opening operation is completed, the roll changing operation is performed. The entire roll changing process can reduce emulsion splashing and save production costs.
[0036] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:
[0038] Figure 1 This is a structural schematic diagram of a cold rolling mill provided in an embodiment of the present application;
[0039] Figure 2 This is a flow chart of a roll changing method for a cold rolling mill provided in an embodiment of the present application;
[0040] Figure 3 This is a schematic diagram of a rolling mill layout provided in an embodiment of the present application;
[0041] Figure 4 This is a structural block diagram of a roll changing device for a cold rolling mill provided in an embodiment of the present application. DETAILED DESCRIPTION
[0042] In order to make the purpose, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings. It should be understood that the embodiments of the present disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.
[0043] Before giving a detailed introduction to a roll changing method for a cold rolling mill provided in an embodiment of the present application, a brief introduction to the implementation environment involved is first given.
[0044] Figure 1 This is a schematic diagram of the structure of a cold rolling mill provided in an embodiment of the present application. Figure 1 As shown, the cold rolling mill includes a tank 1, a supply pump 2, a rolling mill 3, a collecting tray 4, a reflux pump 5, and a flow meter 6. The tank 1 is used to load the emulsion, the supply pump 2 is used to spray the emulsion in the tank 1 into the frame of the rolling mill 3, the rolling mill 3 is used to roll steel plates, the collecting tray 4 is used to collect the emulsion sprayed into the frame of the rolling mill 3, the reflux pump 5 is used to pump the emulsion in the collecting tray 4 back to the tank 1, and the flow meter 6 is used to detect the emulsion flow rate.
[0045] For example, there are three boxes 1, namely boxes No. 1, No. 2 and No. 3, and five rolling mills 3, namely S1-S5 racks. Boxes No. 1 and No. 2 supply emulsion to S1-S4 racks, and box No. 3 supplies emulsion to S5 rack. Each rack is provided with a collecting tray 4, and the emulsion in the collecting tray 4 is pumped to the box 1 through the reflux pipeline by a reflux pump 5 to form a circulation. The collecting tray 4 is divided into two (one for S1-S4 racks and one for S5). Boxes No. 1 and No. 2 have the same function and serve as backup for each other. Generally, one of them is selected for emulsion supply. Boxes No. 1 and No. 2 correspond to three supply pumps 2, numbered 1-3, of which two are main pumps and one is a backup pump. The distribution method is that one main pump supplies S1 and S2 racks, and the other main pump supplies S3 and S4 racks. Box No. 3 corresponds to 4 supply pumps, numbered 4-7, of which 2 supply pumps are used for lubrication and serve as backup for each other, and the other 2 supply pumps are used for cooling and serve as backup for each other.
[0046] Figure 2 This is a flow chart of a roll changing method for a cold rolling mill provided in an embodiment of the present application. Figure 1 As shown, the method includes:
[0047] Step S210: After receiving the stop instruction, control the operating speeds of the plurality of rolling mills to drop to 0 and the rolling force to drop to a preset minimum rolling force, and control the first target supply pump to stop running.
[0048] The first target supply pump is a supply pump corresponding to a roll-changing mill among the multiple rolling mills, and the roll-changing mill is a rolling mill whose rolls need to be replaced.
[0049] In this embodiment, the cold rolling mill must be stopped before roll changing and restarted after roll changing. A stop button is provided in the operator's operating room, and pressing it triggers a stop command. Therefore, receiving a stop command indicates that the cold rolling mill needs to be stopped, reducing the operating speeds of multiple rolling mills to zero and the rolling force to a preset minimum rolling force. For example, the minimum rolling force is 1.5 MN.
[0050] In the embodiment of the present application, the rolling mill that requires roll replacement is identified in advance and designated as the roll-changing mill. The supply pump corresponding to the roll-changing mill is designated as the first target supply pump. Because the roll-changing mill will subsequently require a roll-changing operation, which may cause emulsion splashing, the first target supply pump can be controlled to stop operating during the shutdown period, stopping the supply of emulsion to the roll-changing mill. This reduces the amount of emulsion in the mill, thereby reducing the amount of emulsion splashing during the roll-changing operation.
[0051] Step S220: Obtain the emulsion flow rate of each roll-changing mill.
[0052] In the embodiment of the present application, after the first target supply pump stops running, the flow rate of the emulsion sprayed into the roll-changing mill will gradually decrease, and the change in the emulsion flow rate can be detected in real time by a flow meter.
[0053] Step S230: Control the roll-changing mill to open the roll gap when the emulsion flow rate is less than a preset first flow rate threshold.
[0054] In an embodiment of the present application, if the emulsion flow rate of the roll-changing mill is less than the preset first flow rate threshold, it means that the emulsion sprayed onto the roll-changing mill is already very small. At this time, performing a roll gap opening operation on the roll-changing mill can further reduce the splashing of the emulsion.
[0055] Step S240: After the roll gap opening operation is completed, the roll changing operation is performed.
[0056] In this embodiment of the present application, roll changing can proceed after the roll gap opening operation is complete. The entire roll changing process is fully automated, but personnel can be stationed near the rolling mill stand to monitor the automatic roll changing process. On-site personnel can manually intervene when necessary to ensure smooth roll changing. Personnel in the operator's room are responsible for parking control, roll data monitoring, and fault diagnosis and troubleshooting. This method can effectively reduce emulsion splashing during roll changing, saving production costs.
[0057] Optionally, step S210 includes:
[0058] Step S2101: If the number of the first target supply pumps is greater than 1, and there is a preset second target supply pump among all the first target supply pumps, then after controlling the second target supply pumps to stop running, the third target supply pumps are controlled to stop running.
[0059] The rolling mill corresponding to the second target supply pump is arranged first and / or last in the order of all rolling mills, and the third target supply pump is the first target supply pump among all first target supply pumps except the second target supply pump.
[0060] In an embodiment of the present application, a plurality of rolling mills are arranged in sequence according to the running direction of the strip, and the frontmost rolling mill (the first in the arrangement order) and the rearmost rolling mill (the last in the arrangement order) are recorded as priority rolling mills, and the supply pumps corresponding to the priority rolling mills are recorded as second target supply pumps. Since the emulsion splashed out from the frontmost and rearmost rolling mills is more likely to splash out to the periphery, while the emulsion splashed out from the middle rolling mill is more likely to fall into the collection tray, when controlling the supply pump to stop running, if there is a second target supply pump among the first target supply pumps, the second target supply pump is stopped first to reduce the emulsion splashed out to the frontmost or rearmost rolling mill, and then the remaining first target supply pumps (third target supply pumps) are controlled to stop running so that the splashed emulsion falls into the collection tray as much as possible.
[0061] Optionally, step S210 further includes:
[0062] Step S2102: If the number of the first target supply pump is equal to 1, control the first target supply pump to stop running.
[0063] In the embodiment of the present application, if there is only one first target supply pump, the order of stopping the pumps does not need to be considered, and the first target supply pump can be directly controlled to stop running.
[0064] Optionally, step S230 includes:
[0065] Step S2301: If there is a preset first target mill among all roll-changing mills, and the first emulsion flow of the first target mill is less than the preset first flow threshold, then after controlling the first target mill to perform a roll gap operation, if the second emulsion flow of the second target mill is less than the first flow threshold, then control the second target mill to perform a roll gap operation.
[0066] The first target rolling mill is neither the first nor the last in the arrangement order of all rolling mills, and the second target rolling mill is the roll-changing rolling mill other than the first target rolling mill among all roll-changing rolling mills.
[0067] In this embodiment of the present application, the remaining mills in the arrangement sequence, excluding the first and last mills, are designated as the first target mills. Because the first and last mills are located at the outermost edges, they can block the emulsion splashing from the mills in the middle. Therefore, when opening the roll gap, if the first target mill is among the mills requiring roll change, the roll gap opening operation is performed on the first target mill first, followed by the remaining mills (the second target mills). This allows the mills on both sides to block the emulsion splashing from the middle mill.
[0068] Figure 3 This is a schematic diagram of a rolling mill layout provided in an embodiment of the present application. Figure 3 As shown, the multiple rolling mills include five rolling mills, namely S1-S5, wherein the S1 rolling mill and the S5 rolling mill are located on two sides respectively, which can block the emulsion splashed by the S2-S4 rolling mills.
[0069] Optionally, step S230 further includes:
[0070] Step S2303: If there is no first target rolling mill among all roll-changing rolling mills, control the roll-changing rolling mills with emulsion flow less than the first flow threshold to perform roll gap opening operation.
[0071] In the embodiment of the present application, if the arrangement order of all roll-changing mills is the first or the last, there is no need to consider the order of the roll-opening operation, and the roll-changing mill with an emulsion flow rate less than the first flow rate threshold can be directly controlled to perform the roll-opening operation.
[0072] Optionally, step S230 further includes:
[0073] If the number of first roll-changing mills is greater than a preset number threshold, only the first roll-changing mills within the number threshold are controlled to perform the roll gap opening operation each time until all first roll-changing mills complete the roll gap opening operation; if the number of first roll-changing mills is less than or equal to the number threshold, all first roll-changing mills are controlled to perform the roll gap opening operation.
[0074] The first roll-changing mill is a roll-changing mill in which the emulsion flow rate is less than a preset first flow rate threshold.
[0075] In the embodiments of the present application, since roll gap opening during roll change is a large hydraulic stroke operation, it will cause pressure fluctuations in the hydraulic system. To avoid concentrated roll gap opening during roll change, a maximum of n stands are generally selected to perform roll gap opening operations simultaneously. For example, n is 3, i.e., the number threshold is 3.
[0076] Optionally, after step S240, the method further includes:
[0077] After the roll changing operations of all roll changing mills are completed, the first target supply pump is controlled to start running, and after the emulsion flow rate is greater than the preset second flow rate threshold, the operating speed of multiple rolling mills is controlled to increase to the preset target speed and the rolling force is controlled to increase to the preset target rolling force.
[0078] In the embodiment of the present application, after the roll change is completed, the mill is started. Before starting, the emulsion supply is restored. When the emulsion supply reaches a second flow rate threshold, the emulsion forms a flowing state in the pipeline, providing cleaning and lubrication for the rolling process. Simultaneously, the operating speeds of the multiple rolling mills are controlled to reach preset target speeds and rolling forces to reach preset target rolling forces, thereby reducing emulsion loss. For example, the second flow rate threshold ranges from 50 to 100 l / min, while the pipeline pressure is close to 0.1 bar.
[0079] The method in the embodiment of the present application brings an annual economic benefit of approximately 500,000, and the cost reduction effect is proportional to the number of roller changes.
[0080] Based on the same application concept, the embodiment of the present invention also provides a roll changing device for a cold rolling mill. Figure 4 This is a structural block diagram of a roll changing device for a cold rolling mill provided in an embodiment of the present application. Figure 4 As shown, the device 400 includes a first control module 401 , an acquisition module 402 , a second control module 403 and a roller changing module 404 .
[0081] A first control module 401 is configured to: the first target supply pump is a supply pump corresponding to a roll-changing mill among the plurality of rolling mills, where the roll-changing mill is a rolling mill that needs to have its rolls replaced;
[0082] An acquisition module 402 is used to acquire the emulsion flow rate of each roll-changing mill;
[0083] The second control module 403 is used to control the roll-changing mill to perform a roll gap opening operation when the emulsion flow rate is less than a preset first flow rate threshold;
[0084] The roll changing module 404 is used to perform a roll changing operation after the roll gap opening operation is completed.
[0085] Optionally, the first control module 401 is further configured to:
[0086] If the number of the first target supply pumps is greater than 1, and there is a preset second target supply pump among all the first target supply pumps, then after the second target supply pumps are controlled to stop running, the third target supply pump is controlled to stop running;
[0087] The rolling mill corresponding to the second target supply pump is arranged first and / or last in the order of all rolling mills, and the third target supply pump is the first target supply pump among all first target supply pumps except the second target supply pump.
[0088] Optionally, the first control module 401 is further configured to:
[0089] If the number of the first target feed pumps is equal to 1, the first target feed pump is controlled to stop operating.
[0090] Optionally, the second control module 403 is further configured to:
[0091] If there is a preset first target rolling mill among all roll-changing rolling mills, and the first emulsion flow rate of the first target rolling mill is less than the preset first flow rate threshold, then after controlling the first target rolling mill to perform a roll gap opening operation, if the second emulsion flow rate of the second target rolling mill is less than the first flow rate threshold, then controlling the second target rolling mill to perform a roll gap opening operation;
[0092] The first target rolling mill is neither the first nor the last in the arrangement order of all rolling mills, and the second target rolling mill is the roll-changing rolling mill other than the first target rolling mill among all roll-changing rolling mills.
[0093] Optionally, the second control module 403 is further configured to:
[0094] If there is no first target rolling mill among all roll-changing rolling mills, the roll-changing rolling mills whose emulsion flow rate is less than the first flow rate threshold are controlled to perform the roll gap opening operation.
[0095] Optionally, the apparatus 400 further includes a third control module, configured to:
[0096] After the roll changing operations of all roll changing mills are completed, the first target supply pump is controlled to start running, and after the emulsion flow rate is greater than the preset second flow rate threshold, the operating speed of multiple rolling mills is controlled to increase to the preset target speed and the rolling force is controlled to increase to the preset target rolling force.
[0097] Optionally, the second control module 403 is further configured to:
[0098] If the number of the first roll-changing mills is greater than a preset number threshold, only the first roll-changing mills with the number threshold are controlled to perform the roll gap opening operation each time until all the first roll-changing mills have completed the roll gap opening operation;
[0099] If the number of the first roll-changing mills is less than or equal to the number threshold, all the first roll-changing mills are controlled to perform a roll gap opening operation;
[0100] The first roll-changing mill is a roll-changing mill in which the emulsion flow rate is less than a preset first flow rate threshold.
[0101] It can be understood that the device provided in the above embodiment is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.
[0102] An embodiment of the present invention further provides an electronic device, which may include a processor and a memory, wherein the processor and the memory may be communicatively connected to each other via a bus or other means.
[0103] The processor may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application, or may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components and other chips, or a combination of the above types of chips.
[0104] The memory may include a large capacity memory for data or instructions. By way of example and not limitation, the memory may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory may include removable or non-removable (or fixed) media. Where appropriate, the memory may be internal or external to the electronic device. In a particular embodiment, the memory may be a non-volatile solid-state memory.
[0105] In one embodiment, the memory may be a read-only memory (ROM). In one embodiment, the ROM may be a mask-programmable ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.
[0106] The processor implements any one of the roll changing methods for the cold rolling mill in the above embodiments by reading and executing computer program instructions stored in the memory.
[0107] In one example, the electronic device may further include a communication interface and a bus. The processor, memory, and communication interface are connected via the bus and communicate with each other. The communication interface is primarily used to enable communication between the various modules, devices, units, and / or devices in the embodiments of this application. Where appropriate, the bus may include one or more buses.
[0108] In addition, in conjunction with the roll changing method for a tandem cold rolling mill in the above-described embodiments, embodiments of the present invention may provide a computer-readable storage medium for implementation. The computer-readable storage medium stores computer program instructions; when executed by a processor, the computer program instructions implement any of the roll changing methods for a tandem cold rolling mill in the above-described embodiments.
[0109] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD). The storage medium can also include a combination of the above-mentioned types of memory.
[0110] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:
[0111] The embodiment of the present application provides a roll changing method, device, equipment and medium for a cold rolling mill group. After receiving a stop command, the method, device, equipment and medium can control the operating speed of multiple rolling mills to drop to 0 and the rolling force to drop to a preset minimum rolling force to stop the mill, and control the first target supply pump to stop running and stop supplying emulsion to the roll changing mill. The first target supply pump is the supply pump corresponding to the roll changing mill among the multiple rolling mills, and the roll changing mill is the mill that needs to replace the rolls; the emulsion flow rate of each roll changing mill is obtained to understand the emulsion disappearance situation; the roll changing mill with an emulsion flow rate less than a preset first flow rate threshold is controlled to perform a roll opening operation, that is, the roll changing mill with no emulsion is subjected to a roll opening operation; after the roll opening operation is completed, the roll changing operation is performed. The entire roll changing process can reduce emulsion splashing and save production costs.
[0112] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.
[0113] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Accordingly, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the invention.
[0114] It should be noted that the above embodiments illustrate rather than limit the invention, and that a person skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The present invention may be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.
Claims
1. A roll changing method for a cold rolling mill, characterized in that: The cold rolling mill group includes a plurality of rolling mills and a plurality of supply pumps, each supply pump is used to provide emulsion to at least one rolling mill, and the method includes: After receiving the stop instruction, controlling the operating speed of the multiple rolling mills to drop to 0 and the rolling force to drop to a preset minimum rolling force, and controlling the first target supply pump to stop running, the first target supply pump being the supply pump corresponding to the roll changing mill among the multiple rolling mills, the roll changing mill being the rolling mill that needs to have its rolls replaced; Obtain the emulsion flow rate of each roll-changing mill; Controlling the roll-changing mill to open the roll gap when the emulsion flow rate is less than a preset first flow rate threshold; After the roll gap opening operation is completed, the roll changing operation is performed.
2. The roll changing method of the cold rolling mill according to claim 1, characterized in that: The controlling the first target supply pump to stop operation includes: If the number of the first target supply pumps is greater than 1, and there is a preset second target supply pump among all the first target supply pumps, then after controlling the second target supply pumps to stop running, the third target supply pump is controlled to stop running; The rolling mill corresponding to the second target supply pump is arranged first and / or last in the order of all rolling mills, and the third target supply pump is the first target supply pump among all the first target supply pumps except the second target supply pump.
3. The roll changing method of the cold rolling mill according to claim 2, characterized in that: The controlling the first target supply pump to stop operation includes: If the number of the first target supply pumps is equal to 1, the first target supply pump is controlled to stop operating.
4. The roll changing method of a cold rolling mill according to claim 1, characterized in that: The step of controlling the roll-changing mill to open the roll gap when the emulsion flow rate is less than a preset first flow rate threshold comprises: If there is a preset first target rolling mill among all roll-changing rolling mills, and the first emulsion flow rate of the first target rolling mill is less than a preset first flow rate threshold, then after controlling the first target rolling mill to perform a roll gap opening operation, if the second emulsion flow rate of the second target rolling mill is less than the first flow rate threshold, then controlling the second target rolling mill to perform a roll gap opening operation; The first target rolling mill is neither the first nor the last in the arrangement order of all rolling mills, and the second target rolling mill is the roll-changing rolling mill other than the first target rolling mill among all the roll-changing rolling mills.
5. The roll changing method of the cold rolling mill according to claim 4, characterized in that: The step of controlling the roll-changing mill to open the roll gap when the emulsion flow rate is less than a preset first flow rate threshold comprises: If the first target rolling mill is not present among all the roll-changing rolling mills, the roll-changing rolling mills having the emulsion flow rate less than the first flow rate threshold are controlled to perform a roll gap opening operation.
6. The roll changing method of a cold rolling mill according to claim 1, characterized in that: After the roll gap opening operation is completed and the roll changing operation is performed, the method further includes: After the roll changing operations of all roll changing mills are completed, the first target supply pump is controlled to start running, and after the emulsion flow rate is greater than the preset second flow rate threshold, the operating speed of the multiple rolling mills is controlled to increase to the preset target speed and the rolling force is controlled to increase to the preset target rolling force.
7. The roll changing method of a cold rolling mill according to claim 1, characterized in that: The step of controlling the roll-changing mill to open the roll gap when the emulsion flow rate is less than a preset first flow rate threshold comprises: If the number of the first roll-changing mills is greater than a preset number threshold, only the first roll-changing mills with the threshold number are controlled to perform the roll gap opening operation each time until all the first roll-changing mills have completed the roll gap opening operation; If the number of the first roll-changing rolling mills is less than or equal to the number threshold, controlling all the first roll-changing rolling mills to perform the roll gap opening operation; Wherein, the first roll-changing mill is a roll-changing mill in which the emulsion flow rate is less than a preset first flow rate threshold.
8. A roll changing device for a cold rolling mill, characterized in that: The cold rolling mill group includes a plurality of rolling mills and a plurality of supply pumps, each supply pump is used to supply emulsion to at least one rolling mill, and the device includes: a first control module, configured to, upon receiving a stop instruction, control the operating speeds of the plurality of rolling mills to decrease to 0 and the rolling force to decrease to a preset minimum rolling force, and control a first target supply pump to stop operating, wherein the first target supply pump is a supply pump corresponding to a roll-changing mill among the plurality of rolling mills, and the roll-changing mill is a rolling mill that needs to have its rolls replaced; An acquisition module, used for acquiring the emulsion flow rate of each roll-changing mill; a second control module, configured to control the roll-changing mill to perform a roll-gap opening operation when the emulsion flow rate is less than a preset first flow rate threshold; The roll changing module is used to perform the roll changing operation after the roll gap opening operation is completed.
9. An electronic device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 7 by executing the computer instructions.
10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the method according to any one of claims 1 to 7.