A cold rolling continuous annealing annealing production line control method, device, equipment and medium

Abstract

The application discloses a cold-rolled continuous annealing production line control method, device, equipment and medium, and relates to the technical field of cold-rolled continuous annealing production line control, and aims at solving the problems of unstable operation and strip deviation of an entrance section of a cold-rolled continuous annealing production line. The application discloses a cold-rolled continuous annealing production line control method, device, equipment and medium, which comprises the following steps: after a previous strip and a current strip are welded in an entrance section of a cold-rolled continuous annealing production line, the current strip is transported to an entrance loop at a first speed which is less than a maximum speed, and the entrance loop is controlled to increase to a first loop capacity which is less than a maximum loop capacity and keep the same; after the actual remaining length of the current strip on a target uncoiler is equal to a tail-off reminding length, the speed of the current strip transported to the entrance loop is reduced until the current strip stops, the loop capacity of the entrance loop is adjusted according to the production speed of a process section of the cold-rolled continuous annealing production line; the tail of the current strip is cut by a target cut-off shear of the entrance section, and the current strip is welded with a next strip. The application can guarantee stable operation of the entrance section and inhibit strip deviation, and can eliminate the problem that the edge scratching and strip breaking caused by the large loop capacity of the bad part of the strip head shape may cause.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold rolling continuous annealing, and in particular to a cold rolling continuous annealing production line control method, device, equipment and medium. BACKGROUND

[0002] At the entrance section of the cold rolling continuous annealing production line, the strip steels on two uncoilers need to be sequentially and alternately head-to-tail welded, and then sent into the entrance loop of the entrance section for storage, so that the strip steel stored in the entrance loop can be transported to the process section of the cold rolling continuous annealing production line during the welding of the adjacent two strip steels, avoiding the influence on the process section.

[0003] However, in the related art, after the welding of the strip steel is completed, the loop capacity of the entrance section is always controlled to be filled to the maximum capacity. The larger the loop capacity is, the higher the sensitivity of the production line to the strip steel profile defect is, and the more serious the loop capacity deviation is, which is prone to cause the edge scratching and strip breaking problems. Therefore, how to reduce the influence of the strip steel deviation caused by the excessive loop capacity is a problem to be solved at present. SUMMARY

[0004] The embodiments of the present application provide a cold rolling continuous annealing production line control method, device, equipment and medium, which solve the technical problem in the prior art that after the welding of the strip steel is completed, the loop capacity of the entrance section is always controlled to be filled to the maximum capacity, the larger the loop capacity is, the higher the sensitivity of the production line to the strip steel profile defect is, and the more serious the loop capacity deviation is, which is prone to cause the edge scratching and strip breaking problems, and achieve the technical effect of reducing the influence of the strip steel deviation caused by the excessive loop capacity.

[0005] In a first aspect, the present application provides a cold rolling continuous annealing production line control method, which comprises:

[0006] After the welding of the last strip steel and the current strip steel in the entrance section of the cold rolling continuous annealing production line, the current strip steel is transported to the entrance loop at a first speed less than the maximum speed, and the entrance loop is increased to a first loop capacity less than the maximum loop capacity and kept;

[0007] The actual remaining length of the current strip steel on the target uncoiler is monitored;

[0008] After the actual remaining length of the current strip steel on the target uncoiler is equal to the tail throwing reminder length, the speed of the current strip steel transported to the entrance loop is reduced until stopped, and the loop capacity of the entrance loop is adjusted following the production speed of the process section of the cold rolling continuous annealing production line;

[0009] The tail of the current strip steel is cut by the target slitting shear of the entrance section, and the current strip steel is welded with the next strip steel;

[0010] The current strip steel is taken as a new previous strip steel, and the next strip steel is taken as a new current strip steel. The step of transporting the new previous strip steel and the new current strip steel into the entry loop at a first speed less than the maximum speed, and controlling the entry loop to increase to a first loop capacity less than the maximum loop capacity and to keep is executed again.

[0011] Further, the preset acceleration length is greater than the tail swing reminding length. After monitoring the actual remaining length of the current strip steel on the target unwinder, the method further comprises:

[0012] After the actual remaining length of the current strip steel on the target unwinder is equal to the preset acceleration length, the current strip steel is transported into the entry loop at the maximum speed, and the entry loop is controlled to increase to the maximum loop capacity and to keep.

[0013] Further, after the actual remaining length of the current strip steel on the target unwinder is equal to the tail swing reminding length, the speed of transporting the current strip steel into the entry loop is reduced until it stops, including:

[0014] The first grating device is controlled to monitor the tail of the current strip steel; the first grating device is arranged on the strip steel transmission path between the unwinder where the current strip steel is located and the corresponding target slitting shear, and the distance between the first grating device and the target slitting shear is greater than the target preset distance;

[0015] After the first grating device monitors the tail of the current strip steel passing through the first installation position where the first grating device is located, the actual distance of the tail of the current strip steel transported after passing through the first grating device is predicted according to the actual transportation speed of the current strip steel;

[0016] The actual tail length of the current strip steel not passing through the target slitting shear is determined according to the actual distance;

[0017] When the actual tail length is equal to the target preset length, the speed of transporting the current strip steel into the entry loop is reduced until it stops, so that the actual tail length of the current strip steel not passing through the target slitting shear when the current strip steel stops transporting is greater than or equal to the target reserved length; the target preset length is greater than the target reserved length; and the target reserved length is less than the target preset distance.

[0018] Further, before the actual tail length is equal to the target preset length, the method further comprises:

[0019] The shortest deceleration distance is determined according to the maximum deceleration of the current strip steel transported into the entry loop;

[0020] The target preset length is determined according to the target reserved length and the shortest deceleration distance.

[0021] Further, before the target slitting shear of the entry section is controlled to shear the tail of the current strip steel, the method further comprises:

[0022] monitoring the tail of the current strip steel by the second grating device; the second grating device is arranged on the strip steel transmission path between the uncoiler where the current strip steel is located and the corresponding target cut-to-length shear, and the distance between the second grating device and the target cut-to-length shear is a limit preset distance, which is smaller than the target preset distance;

[0023] after the second grating device monitors the tail of the current strip steel passing through the second installation position where the second grating device is located, controlling the current strip steel to decelerate at a maximum deceleration until stopping.

[0024] Further, after the target cut-to-length shear at the entrance section cuts the tail of the current strip steel, the method further comprises:

[0025] for the target tail of the current strip steel after being cut, according to the actual tail length of the target tail, the size of the waste container corresponding to the target cut-to-length shear, and the interval distance between the target pinch roll before the target cut-to-length shear and the target cut-to-length shear, determining the target number of cuts of the target tail so that the target tail is cut according to the target number of cuts, the obtained multiple pieces of waste of the target tail can fall into the waste container, and the length of the last piece of waste of the target tail is greater than the interval distance.

[0026] Further, determining the actual tail length of the current strip steel not passing through the target cut-to-length shear according to the actual distance comprises:

[0027] subtracting the second distance between the first grating device and the target cut-to-length shear from the actual distance to obtain the difference as the actual tail length of the current strip steel not passing through the target cut-to-length shear.

[0028] In a second aspect, the present application provides a cold rolling continuous annealing line control device, which comprises:

[0029] a low-speed conveying module, configured to control the current strip steel to be conveyed to the entrance loop at a first speed less than the maximum speed after the last strip steel and the current strip steel are welded in the entrance section of the cold rolling continuous annealing line, and control the entrance loop to increase to a first loop capacity less than the maximum loop capacity and remain unchanged;

[0030] a length monitoring module, configured to monitor the actual remaining length of the current strip steel on the target uncoiler;

[0031] a deceleration conveying module, configured to control the speed of the current strip steel conveyed to the entrance loop to decrease until stopping after the actual remaining length of the current strip steel on the target uncoiler is equal to the tail-off prompting length, and control the loop capacity of the entrance loop to follow the production speed of the process section of the cold rolling continuous annealing line;

[0032] The shearing and welding module is configured to control the target slitting shears of the entry section to shear the tail of the current strip steel, and control the current strip steel to be welded with the next strip steel.

[0033] The cycle module is configured to return to execute the steps of controlling the current strip steel to be transported into the entry loop at the first speed less than the maximum speed, and controlling the entry loop to increase to the first loop size less than the maximum loop size and keep, for the new previous strip steel and the new current strip steel.

[0034] Further, the preset acceleration length is greater than the tail throwing prompt length, and the acceleration transporting module is configured to:

[0035] After monitoring the actual remaining length of the current strip steel on the target uncoiler, after the actual remaining length of the current strip steel on the target uncoiler is equal to the preset acceleration length, the current strip steel is controlled to be transported into the entry loop at the maximum speed, and the entry loop is controlled to increase to the maximum loop size and keep.

[0036] Further, the deceleration transporting module is configured to:

[0037] The first grating device is configured to monitor the tail of the current strip steel, and the first grating device is arranged on the strip steel transmission path between the uncoiler where the current strip steel is located and the corresponding target slitting shears, and the distance between the first grating device and the target slitting shears is greater than the target preset distance.

[0038] After the first grating device monitors the tail of the current strip steel passing through the first installation position where the first grating device is located, the actual distance of the tail of the current strip steel transported after passing through the first grating device is predicted according to the actual transporting speed of the current strip steel.

[0039] The actual tail length of the current strip steel not passing through the target slitting shears is determined according to the actual distance.

[0040] When the actual tail length is equal to the target preset length, the transporting speed of the current strip steel into the entry loop is controlled to decrease until stopping, so that the actual tail length of the current strip steel not passing through the target slitting shears when the current strip steel stops transporting is greater than or equal to the target reserved length; the target preset length is greater than the target reserved length; and the target reserved length is less than the target preset distance.

[0041] Further, the target preset length determination module is configured to:

[0042] Before the actual tail length is equal to the target preset length, the shortest deceleration distance is determined according to the maximum deceleration of the current strip steel transported into the entry loop.

[0043] The target preset length is determined according to the target reserved length and the shortest deceleration distance.

[0044] Further, an emergency monitoring module is configured to:

[0045] Before the target slitting shear of the entry section is controlled to slit the tail of the current strip, a second grating device is controlled to monitor the tail of the current strip; the second grating device is arranged on a strip transmission path between an uncoiler where the current strip is located and the corresponding target slitting shear, a distance between the second grating device and the target slitting shear is a limit preset distance, and the limit preset distance is less than the target preset distance.

[0046] After the second grating device monitors that the tail of the current strip passes through a second installation position where the second grating device is located, the current strip is controlled to decelerate at a maximum deceleration until it stops.

[0047] Further, a tail slitting module is configured to:

[0048] After the target slitting shear of the entry section is controlled to slit the tail of the current strip, for a target tail of the current strip after being slit, according to an actual tail length of the target tail, a size of a waste container corresponding to the target slitting shear, and an interval distance between a target pinch roll before the target slitting shear and the target slitting shear, a target number of cuts of the target tail is determined, so that a plurality of pieces of waste of the target tail obtained after the target tail is slit according to the target number of cuts can fall into the waste container, and a length of a last piece of waste of the target tail is greater than the interval distance.

[0049] Further, a deceleration transportation module is configured to:

[0050] A second distance between the first grating device and the target slitting shear is subtracted by the actual distance, and a difference obtained is an actual tail length of the current strip that has not passed through the target slitting shear.

[0051] In a third aspect, the present application provides an electronic device, comprising:

[0052] a processor;

[0053] a memory for storing processor-executable instructions;

[0054] The processor is configured to execute to implement the cold rolling continuous annealing production line control method provided in the foregoing.

[0055] In a fourth aspect, the present application provides a non-transitory computer-readable storage medium, when instructions in the storage medium are executed by a processor of an electronic device, the electronic device can execute to implement the cold rolling continuous annealing production line control method provided in the foregoing.

[0056] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0057] The embodiment controls the current strip to be transported into the entry loop at a first speed less than the maximum speed after the previous strip is welded with the current strip in the entry section of the cold rolling continuous annealing production line, and controls the entry loop to increase to a first loop capacity less than the maximum loop capacity and keep; monitors the actual remaining length of the current strip on the target uncoiler; after the actual remaining length of the current strip on the target uncoiler is equal to the tail-off warning length, controls the speed of the current strip transported into the entry loop to decrease until stopping, controls the loop capacity of the entry loop to follow the production speed adjustment of the process section of the cold rolling continuous annealing production line; controls the tail of the current strip to be cut by the target slitting shear of the entry section, and controls the current strip to be welded with the next strip; takes the current strip as a new previous strip, takes the next strip as a new current strip, and returns to execute the step of controlling the new previous strip and the new current strip to be transported into the entry loop at a first speed less than the maximum speed, and controlling the entry loop to increase to a first loop capacity less than the maximum loop capacity and keep. It can be seen that the embodiment runs the entry section at a low speed after the entry loop capacity is filled to a small capacity, and the entry loop is kept at a low capacity, which can ensure stable operation of the entry section and inhibit strip deviation, can eliminate the problem of edge scratching and strip breakage caused by large-capacity deviation of the strip head due to poor strip shape, can ensure the continuity of the process section, and can eliminate the risk of edge scratching and strip breakage caused by deviation of the strip head due to poor strip shape, greatly improves the production yield, reduces the labor load of the production post and the safety hidden danger in the operation process, and improves the intelligentization and automation level of the production line. BRIEF DESCRIPTION OF DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0059] Figure 1 A flowchart of a cold rolling continuous annealing production line control method provided by the embodiment;

[0060] Figure 2 A device distribution schematic diagram of the entry section of the cold rolling continuous annealing production line provided by the embodiment;

[0061] Figure 3 A transportation speed change curve and a loop capacity change curve schematic diagram provided by the embodiment;

[0062] Figure 4 A position distribution schematic diagram of the first grating device and the second grating device provided by the embodiment;

[0063] Figure 5 A schematic diagram of a transport speed change curve is provided for this embodiment;

[0064] Figure 6 A schematic diagram of a cold rolling continuous annealing production line control device is provided for this embodiment;

[0065] Figure 7 A schematic diagram of an electronic device is provided for this embodiment.

[0066] Reference signs:

[0067] 11-uncoiler, 12-turnaround pinch roll, 13-cutting shear, 14-turnaround pinch roll, 21-uncoiler, 22-turnaround pinch roll, 23-cutting shear, 24-turnaround pinch roll, 25-turnaround pinch roll;

[0068] 3-turnaround pinch roll, 4-welding machine, 5-correction pinch roll, 6-edge heating device, 7-weld detection instrument, 8-tension roller group, 9-inlet loop;

[0069] A-first grating device, B-second grating device. DETAILED DESCRIPTION

[0070] The embodiment of the present application provides a cold rolling continuous annealing production line control method, and solves the technical problem in the prior art that after the welding of the strip steel is completed, the loop capacity of the inlet section is always controlled to be the maximum loop capacity, and the larger the loop capacity is, the higher the sensitivity of the production line to the strip steel pattern defect is, and then the larger the loop capacity is, the more serious the deviation is, which easily leads to edge scratching and strip breaking.

[0071] The technical scheme of the embodiment of the present application is as follows to solve the above technical problem:

[0072] The embodiment controls the current strip to be transported into the entry loop 9 at a first speed less than the maximum speed and controls the entry loop 9 to increase to a first loop capacity less than the maximum loop capacity and keep after the last strip is welded with the current strip in the entry section of the cold rolling continuous annealing production line; monitors the actual remaining length of the current strip on the target uncoiler; controls the speed of the current strip to be transported into the entry loop 9 to decrease until stopping and controls the loop capacity of the entry loop 9 to follow the production speed of the process section of the cold rolling continuous annealing production line after the actual remaining length of the current strip on the target uncoiler is equal to the tail-off reminding length; controls the tail of the current strip to be cut by the target slitting shear of the entry section, and controls the current strip to be welded with the next strip; takes the current strip as a new last strip and takes the next strip as a new current strip, and returns to execute the step of controlling the new last strip and the new current strip to be transported into the entry loop 9 at a first speed less than the maximum speed and controlling the entry loop 9 to increase to a first loop capacity less than the maximum loop capacity and keep. It can be seen that the entry loop 9 is filled with a smaller loop capacity at a lower speed in the embodiment, and the entry section runs at a speed following the speed of the process section after the loop capacity of the entry loop 9 is kept at a lower capacity, which can ensure stable operation of the entry section and inhibit strip deviation, can eliminate the problem of edge scratching and strip breakage caused by large loop capacity of the strip head due to poor strip shape, can ensure the continuity of the process section, and can eliminate the risk of edge scratching and strip breakage caused by poor strip shape of the strip head, greatly improves the production yield, reduces the labor load of the production post and the safety hidden danger existing in the operation process, and improves the intelligentization and automation level of the production line.

[0073] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings in the specification and specific embodiments.

[0074] Firstly, it should be noted that the term "and / or" appearing in the present document only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present document generally represents an "or" relationship between the front and rear associated objects.

[0075] The embodiment provides a cold rolling continuous annealing production line control method as shown in Figure 1 The method comprises steps S11-S15.

[0076] Step S11, after the last strip is welded with the current strip in the entry section of the cold rolling continuous annealing production line, the current strip is controlled to be transported into the entry loop 9 at a first speed less than the maximum speed, and the entry loop 9 is controlled to increase to a first loop capacity less than the maximum loop capacity and keep;

[0077] Step S12, monitoring the actual remaining length of the current strip steel on the target uncoiler;

[0078] Step S13, after the actual remaining length of the current strip steel on the target uncoiler is equal to the tail-off reminding length, controlling the speed of the current strip steel transported into the entry loop 9 to decrease until stopping, and controlling the loop amount of the entry loop 9 to follow the production speed adjustment of the process section of the cold rolling continuous annealing production line;

[0079] Step S14, controlling the target slitting shear of the entry section to cut the tail of the current strip steel, and controlling the current strip steel to be welded with the next strip steel;

[0080] Step S15, taking the current strip steel as the new previous strip steel, and taking the next strip steel as the new current strip steel, returning to execute the step of controlling the current strip steel to be transported into the entry loop 9 at the first speed less than the maximum speed, and controlling the entry loop 9 to increase to the first loop amount less than the maximum loop amount and keep, for the new previous strip steel and the new current strip steel.

[0081] The cold rolling continuous annealing production line control method provided by the embodiment can be executed by the upper computer of the cold rolling continuous annealing production line, or can be executed by the related controller of the entry section of the cold rolling continuous annealing production line, and the embodiment does not limit this.

[0082] Before the cold rolling continuous annealing production line control method is described, the relative positions of the related equipment of the entry section of the cold rolling continuous annealing production line are described first. Figure 2 The relative positions of the related equipment of the entry section of the cold rolling continuous annealing production line are described.

[0083] The entry section of the cold rolling continuous annealing production line includes two strip steel conveying lines before the welding machine 4, one of which (denoted as the first line) includes the uncoiler 11, the turning pinch roll 12, the slitting shear 13, and the turning pinch roll 14; the other of which (denoted as the second line) includes the uncoiler 21, the turning pinch roll 22, the turning pinch roll 25, the slitting shear 23, and the turning pinch roll 24.

[0084] The first line and the second line convey the strip steel to the welding machine 4 in turn. For example, the uncoiler 11 of the first line unwinds the first strip steel and conveys it to the welding machine 4, the slitting shear 13 cuts the tail of the first strip steel that needs to be discarded, and when the newly formed tail of the first strip steel is conveyed to the welding machine 4, it stops. Then, the uncoiler 22 of the second line unwinds the second strip steel and conveys it to the welding machine 4, the slitting shear 23 cuts the head of the second strip steel that needs to be discarded, and when the newly formed head of the second strip steel is conveyed to the welding machine 4, it stops. At this time, the welding machine 4 welds the newly formed tail of the first strip steel and the newly formed head of the second strip steel, and after the welding is completed, the strip steel is continuously conveyed to the entry loop 9.

[0085] Now a cold rolling continuous annealing production line control method provided by the embodiment is described as follows.

[0086] As to step S11, after the previous strip and the current strip are welded in the entry section of the cold rolling continuous annealing production line, the current strip is controlled to be transported into the entry loop 9 at a first speed less than the maximum speed, and the entry loop 9 is controlled to increase to a first loop capacity less than the maximum loop capacity and keep.

[0087] After the previous strip and the current strip are welded in the entry section of the cold rolling continuous annealing production line, the previous strip and the current strip continue to be transported into the entry loop 9, specifically the current strip is transported into the entry loop 9. At this time, the current strip can be controlled to be transported into the entry loop 9 at a first speed less than the maximum speed, and the entry loop 9 is controlled to increase to a first loop capacity less than the maximum loop capacity and keep.

[0088] As shown in Figure 3 , the first speed is V1, the maximum speed is V2, the first loop capacity is P2, and the maximum loop capacity is P1. Step S11 refers to Figure 3 the stage corresponding to the V1 speed section and the P2 loop capacity section.

[0089] After the welding is completed, the entry loop 9 is filled to a smaller capacity at a lower speed in the embodiment, and then the entry section runs at the process section speed. The entry loop 9 keeps at a lower capacity, which can ensure the stable running of the entry and inhibit the strip deviation, and can eliminate the problem that the large-capacity deviation of the strip head may cause edge scratching and strip breaking. It can ensure the continuity of the process section running and eliminate the risk of edge scratching and strip breaking caused by the strip head due to poor strip shape.

[0090] It should be noted that the line corresponding to the previous strip can be the first line or the second line, and the line corresponding to the current strip can be the first line or the second line, only the lines corresponding to the previous strip and the current strip are different.

[0091] As to step S12, the actual remaining length of the current strip on the target uncoiler is monitored.

[0092] The target uncoiler can be the uncoiler 11 or the uncoiler 21. The remaining length of the current strip on the target uncoiler can be directly calculated or measured, and the remaining length is recorded as the actual remaining length. The actual remaining length will continuously decrease over time until it is 0.

[0093] In the process, whether the actual remaining length is equal to the preset speed-up length is judged according to the first preset frequency (which can be set according to actual conditions), and when the actual remaining length is greater than the preset speed-up length, the change of the actual remaining length is continuously monitored until the actual remaining length is equal to the preset speed-up length. After the actual remaining length of the current strip steel on the target uncoiler is equal to the preset speed-up length, the current strip steel is transported into the entry loop 9 at the maximum speed, and the entry loop 9 is controlled to increase to the maximum loop capacity and remain.

[0094] As shown in Figure 3 , the first speed is V1, the maximum speed is V2, the first loop capacity is P2, and the maximum loop capacity is P1. Controlling the current strip steel to be transported into the entry loop 9 at the maximum speed, and controlling the entry loop 9 to increase to the maximum loop capacity and remain, means Figure 3 that the V1 speed section changes to the V2 speed section, and the P2 loop capacity section changes to the P1 loop capacity section. Filling the entry loop 9 to the maximum loop capacity can supplement the loop capacity loss during welding, and also provide sufficient loop capacity for the next welding.

[0095] After the actual remaining length is equal to the preset speed-up length, whether the actual remaining length is equal to the tail-off warning length (the preset speed-up length is greater than the tail-off warning length) is continuously judged according to the second preset frequency (which can be the same as or different from the first preset frequency), and when the actual remaining length is greater than the tail-off warning length, the change of the actual remaining length is continuously monitored until the actual remaining length is equal to the tail-off warning length. After the actual remaining length is equal to the tail-off warning length, step S13 is continuously executed.

[0096] It should be noted that in the entry section generated by cold rolling and annealing, the strip steels on the two uncoilers need to be alternately welded and sent into the process section of cold rolling and annealing for processing. Before welding, the unqualified part of the strip tail on the uncoiler needs to be sheared to be discarded.

[0097] In the related art, the length of the strip steel remaining on the uncoiler itself is first monitored, and when the remaining length of the strip steel is the length that needs to be sheared, the strip tail is manually jogged to be as close as possible to the slitting shear to improve the yield. However, manual jogging mainly relies on visual determination of the length of the strip steel that needs to be sheared before the slitting shear, and the efficiency and accuracy are not high. Therefore, how to improve the efficiency and accuracy of the tail-off shearing of the strip tail is a problem that needs to be solved at present. The embodiment specifically solves the problem through step S13.

[0098] Regarding step S13, after the actual remaining length of the current strip steel on the target uncoiler is equal to the tail-off warning length, the speed of the current strip steel transported into the entry loop 9 is reduced until it stops, and the loop capacity of the entry loop 9 is adjusted following the production speed of the process section of the cold rolling and annealing production line.

[0099] Step S13 specifically includes steps S131-S134.

[0100] Step S131: Control the first grating device A to monitor the tail of the current strip. The first grating device A is set on the strip transport path between the uncoiler where the current strip is located and the corresponding target slitting shear. The distance between the first grating device A and the target slitting shear is greater than the target preset distance. The target preset distance needs to be greater than the target preset length.

[0101] Step S132: After the first grating device A detects that the tail of the current strip has passed the first installation position where the first grating device A is located, the actual distance that the tail of the current strip will be transported after passing the first grating device A is predicted based on the actual transport speed of the current strip.

[0102] Step S133: Determine the actual strip tail length that has not passed the target slitting shear based on the actual distance.

[0103] Step S134: When the actual strip tail length equals the target preset length, control the speed of the current strip steel transported into the inlet loop 9 to decrease until it stops, so that when the current strip steel stops transporting, the actual strip tail length of the current strip steel that has not passed the target slitting shear is greater than or equal to the target reserved length; the target preset length is greater than the target reserved length; and the target reserved length is less than the target preset distance.

[0104] Figure 2 The first and second lines in the diagram are each equipped with a first grating device A at corresponding positions. This embodiment only uses... Figure 2 Taking the first line as an example, the installation location of the first grating device A will be explained. See [link / reference] for details. Figure 4 .

[0105] like Figure 4 As shown, the first grating device A is located to the right of the steering pinch roll 12, that is, on the strip transport path between the current strip uncoiler 11 and the corresponding target slitting shear 13. The first grating device A is used to monitor whether the tail of the current strip has passed the first installation position where the first grating device A is located.

[0106] After the first grating device A detects that the tail of the current strip has passed the first installation position where the first grating device A is located, the actual distance the tail of the current strip will travel after passing the first grating device A is predicted based on the actual transport speed of the current strip. For example, at a certain moment, the transport length of the tail of the current strip is as follows: Figure 4 As shown by the blue line L1, L1 represents the actual distance the tail of the current strip is transported after passing through the first grating device A at that moment.

[0107] The second distance between the first grating device A and the target slitting shear is subtracted by the actual distance, and the difference is the actual tail length of the current strip steel which does not pass through the target slitting shear.

[0108] As shown in Figure 4 , the second distance P between the first grating device A and the target slitting shear and the actual distance L1 of the tail after transportation after passing through the first grating device A are known, and the actual tail length L2 of the current strip steel which does not pass through the target slitting shear can be determined, that is, L2 = P - L1.

[0109] Before the actual tail length is equal to the target preset length, the target preset length needs to be determined, and the specific determination method is as follows: the shortest deceleration distance is determined according to the maximum deceleration of the current strip steel transported to the entrance loop 9; the target preset length is determined according to the target reserved length and the shortest deceleration distance.

[0110] The maximum deceleration refers to the fastest deceleration acceleration that the current strip steel can achieve when being transported to the entrance loop 9. According to the current transportation speed of the current strip steel and the maximum deceleration, the distance traveled by the tail of the current strip steel from the current transportation speed to 0 can be determined, which is recorded as the shortest deceleration distance. The distance obtained by adding the shortest deceleration distance and the target reserved length is the position at which the current strip steel should start decelerating at the latest, that is, the target preset length.

[0111] As shown in Figure 5 , the upper curve is the speed change curve of transporting the current strip steel, including the uniform speed running section and the deceleration section. After the tail of the current strip steel passes through the first installation position of the first grating device A, the length of the strip steel before the target slitting shear (that is, the actual tail length) is calculated in real time. Before the actual tail length is equal to the target preset length, it corresponds to the uniform speed running section in Figure 5 . When the actual tail length is equal to the target preset length, the speed of the current strip steel starts to decelerate, and this moment corresponds to the intersection between the uniform speed running section and the deceleration section in Figure 5 , which also corresponds to V1 section and V3 section on the right side of V2 section in Figure 3 . After the speed of the current strip steel becomes 0, the actual tail length should be greater than or equal to the target reserved length. The target reserved length is determined according to the steel grade of the current strip steel and production requirements, and is usually 3-8 meters. The closer the actual tail length is to the target reserved length, the less the qualified strip steel part of the current strip steel will be discarded, and relatively, the higher the yield of the current strip steel will be.

[0112] The embodiment automatically controls the tail of the strip to stop at a set position in front of the slitting shear, ensures that the actual tail length of the strip is greater than the coil and equal to the target reserved length, eliminates the manual joint point deviation of each coil, and eliminates the manual operation task of each coil, reduces the labor load of the production post, improves the intelligent and automatic level of the production line, and improves the production efficiency.

[0113] After the current strip transport speed becomes 0, step S14 can be continued. However, when the first grating device A has a fault, steps S131-step S134 cannot be executed, which may cause the tail of the current strip to completely pass through the target slitting shear without being cut, and further cause the entire production line to stop for processing. To solve this problem, the embodiment uses the second grating device B in the target slitting shear to monitor the tail of the current strip, specifically as follows: Figure 4

[0114] The second grating device B is arranged on the strip transport path between the uncoiler where the current strip is located and the corresponding target slitting shear, the distance between the second grating device B and the target slitting shear is a limit preset distance, and the limit preset distance is less than the target preset distance. The limit preset distance can be 0.5-1 meters.

[0115] After the second grating device B monitors that the tail of the current strip passes through the second installation position where the second grating device B is located, the current strip is controlled to decelerate at the maximum deceleration until it stops, so as to avoid the tail of the current strip passing through the target slitting shear completely, and further avoid causing the shutdown problem.

[0116] Since there is a possibility that the tail will be thrown over the slitting shear after positioning fails due to the short remaining length in front of the slitting shear, manual reverse cutting of the tail is necessary to ensure the welding quality in this case. This situation will inevitably interrupt the continuous production of the process section, causing waste. To prevent this situation from occurring, the embodiment adds a second grating device B in front of the slitting shear as a safety guarantee. Once the second grating device B misses light during the automatic tail throwing process, the system interlock triggers the fast stop command, and the entry section stops at a fast stop acceleration ramp, ensuring that the tail stops in front of the slitting shear, thereby avoiding manual reverse cutting of the tail, avoiding interruption of the continuous production of the process section, avoiding waste, and ensuring the welding quality.

[0117] Regarding step S14, the target slitting shear of the entry section is controlled to cut the tail of the current strip, and the current strip and the next strip are controlled to be welded.

[0118] The target slitting shear is controlled to cut the tail of the current strip, and then the welding machine 4 is controlled to weld the current strip and the next strip.

[0119] ​After the target slitting shear of the control entry section shears the tail of the current strip steel, for the target tail of the current strip steel after being sheared, according to the actual tail length of the target tail, the size of the waste container corresponding to the target slitting shear, and the interval distance between the target pinch roll 12 before the target slitting shear and the target slitting shear, the target number of cuts of the target tail being sheared is determined, so that after the target tail is sheared according to the target number of cuts, the multiple pieces of waste of the target tail obtained can fall into the waste container, and the length of the last piece of waste of the target tail is greater than the interval distance.

[0120] In this way, the last piece of waste can be prevented from being stuck in the pinch roll 12 before the target slitting shear, the annoying problem of the last piece of tail waste remaining between the pinch roll 12 before the shear and the shear blade of the slitting shear can be solved, the manual cleaning task of the production post can be eliminated, the labor load of the production post and the safety hidden danger existing in the operation process can be reduced, the intelligentization and automation level of the production line can be improved, and the production efficiency can be improved.

[0121] Regarding step S15, the current strip steel is taken as a new last strip steel, the next strip steel is taken as a new current strip steel, and for the new last strip steel and the new current strip steel, the step of controlling the current strip steel to be transported to the entry loop 9 at a first speed less than the maximum speed, and controlling the entry loop 9 to increase to a first loop size less than the maximum loop size and remain is executed.

[0122] The current strip steel is updated to the last strip steel, the next strip steel is taken as a new current strip steel, and then steps S11-S15 are continuously executed, so as to continuously provide strip steel raw materials for the process section in a continuous manner.

[0123] In summary, after the previous strip and the current strip are welded in the entry section of the cold rolling continuous annealing production line, the current strip is transported into the entry loop 9 at a first speed less than the maximum speed, and the entry loop 9 is controlled to increase to a first loop size less than the maximum loop size and remain unchanged; the actual remaining length of the current strip on the target uncoiler is monitored; after the actual remaining length of the current strip on the target uncoiler is equal to the tail-off warning length, the speed of the current strip transported into the entry loop 9 is reduced until it stops, and the size of the entry loop 9 is adjusted following the production speed of the process section of the cold rolling continuous annealing production line; the tail of the current strip is cut by the target slitting shear of the entry section, and the current strip is welded with the next strip; the current strip is taken as a new previous strip, and the next strip is taken as a new current strip, and the steps of controlling the current strip to be transported into the entry loop 9 at a first speed less than the maximum speed, and controlling the entry loop 9 to increase to a first loop size less than the maximum loop size and remain unchanged are performed again for the new previous strip and the new current strip. It can be seen that, in the embodiment, the entry loop 9 is filled to a small size at a low speed, and then the entry section runs following the speed of the process section, and the entry loop 9 remains at a low size, which can ensure stable running of the entry section and inhibit strip deviation, can eliminate the problem of edge scratching and strip breakage caused by large-size deviation of the strip head due to poor strip shape, can ensure continuity of the process section, and can eliminate the risk of edge scratching and strip breakage caused by deviation of the strip head due to poor strip shape, greatly improves the production yield, reduces the labor load of the production post and the safety hidden danger in the operation process, and improves the intelligentization and automation level of the production line.

[0124] Based on the same inventive concept, the embodiment provides a cold rolling continuous annealing production line control device as shown in Figure 6 The device comprises:

[0125] The medium-low speed transportation module 61 is used for, after the previous strip and the current strip are welded in the entry section of the cold rolling continuous annealing production line, controlling the current strip to be transported into the entry loop 9 at a first speed less than the maximum speed, and controlling the entry loop 9 to increase to a first loop size less than the maximum loop size and remain unchanged;

[0126] The length monitoring module 62 is used for monitoring the actual remaining length of the current strip on the target uncoiler;

[0127] The speed reduction transportation module 63 is used for, after the actual remaining length of the current strip on the target uncoiler is equal to the tail-off warning length, controlling the speed of the current strip transported into the entry loop 9 to be reduced until it stops, and controlling the size of the entry loop 9 to be adjusted following the production speed of the process section of the cold rolling continuous annealing production line;

[0128] a shearing and welding module 64, configured to control the target slitting shears of the entry section to shear the tail of the current strip, and control the current strip to be welded with the next strip;

[0129] a circulation module 65, configured to return to execute the steps of controlling the current strip to be transported into the entry loop 9 at the first speed less than the maximum speed, and controlling the entry loop 9 to increase to the first loop size less than the maximum loop size and keep, for the new previous strip and the new current strip.

[0130] Further, the preset acceleration length is greater than the tail throwing prompt length, and the acceleration transporting module is configured to:

[0131] After monitoring the actual remaining length of the current strip on the target unwinder, after the actual remaining length of the current strip on the target unwinder is equal to the preset acceleration length, the current strip is controlled to be transported into the entry loop 9 at the maximum speed, and the entry loop 9 is controlled to increase to the maximum loop size and keep.

[0132] Further, the deceleration transporting module 63 is configured to:

[0133] control the first grating device A to monitor the tail of the current strip; the first grating device A is arranged on the strip transmission path between the unwinder where the current strip is located and the corresponding target slitting shears, and the distance between the first grating device A and the target slitting shears is greater than the target preset distance;

[0134] After the first grating device A monitors the tail of the current strip passing through the first installation position where the first grating device A is located, the actual distance of the tail of the current strip transported after passing through the first grating device A is predicted according to the actual transporting speed of the current strip;

[0135] determine the actual tail length of the current strip not passing through the target slitting shears according to the actual distance;

[0136] When the actual tail length is equal to the target preset length, the speed of the current strip transported into the entry loop 9 is reduced until stopped, so that the actual tail length of the current strip not passing through the target slitting shears when the current strip stops transporting is greater than or equal to the target reserved length; the target preset length is greater than the target reserved length; and the target reserved length is less than the target preset distance.

[0137] Further, the target preset length determining module is configured to:

[0138] Before the actual tail length is equal to the target preset length, the shortest deceleration distance is determined according to the maximum deceleration of the current strip transported into the entry loop 9;

[0139] The target preset length is determined according to the target reserved length and the shortest deceleration distance.

[0140] Further, an emergency monitoring module is configured to:

[0141] Before the target slitting shear of the control inlet section shears the tail of the current strip, the second grating device B is controlled to monitor the tail of the current strip; the second grating device B is arranged on the strip transmission path between the uncoiler where the current strip is located and the corresponding target slitting shear, the distance between the second grating device B and the target slitting shear is a limit preset distance, and the limit preset distance is less than the target preset distance.

[0142] After the second grating device B monitors the tail of the current strip passing through the second installation position of the second grating device B, the current strip is controlled to decelerate at the maximum deceleration until it stops.

[0143] Further, a tail slitting module is configured to:

[0144] After the target slitting shear of the control inlet section shears the tail of the current strip, for the target tail of the current strip after being sheared, according to the actual tail length of the target tail, the size of the waste container corresponding to the target slitting shear, and the interval distance between the target pinch roll 12 before the target slitting shear and the target slitting shear, the target number of cuts of the target tail being sheared is determined, so that after the target tail is sheared according to the target number of cuts, a plurality of waste materials of the target tail can fall into the waste container, and the length of the last waste material of the target tail is greater than the interval distance.

[0145] Further, a deceleration transportation module is configured to:

[0146] The second distance between the first grating device A and the target slitting shear is subtracted by the actual distance, and the difference obtained is the actual tail length of the current strip not passing through the target slitting shear.

[0147] Based on the same inventive concept, the embodiment provides an electronic device as shown in Figure 7 The electronic device comprises:

[0148] a processor 71;

[0149] a memory 72 for storing instructions executable by the processor 71;

[0150] The processor 71 is configured to execute to implement the cold rolling continuous annealing production line control method as provided in the foregoing.

[0151] Based on the same inventive concept, the embodiment provides a non-transitory computer readable storage medium, when instructions in the storage medium are executed by the processor 71 of the electronic device, the electronic device can execute a cold rolling continuous annealing production line control method as provided in the foregoing.

[0152] Since the electronic device introduced in the embodiment is the electronic device used for implementing the information processing method in the embodiment, based on the information processing method introduced in the embodiment, those skilled in the art can understand the specific implementation of the electronic device in the embodiment and various changes thereof, so the implementation of the method in the embodiment by the electronic device will not be introduced in detail. As long as the electronic device used for implementing the information processing method in the embodiment is implemented by those skilled in the art, it belongs to the scope of the present application.

[0153] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0154] The present application is described with reference to flowcharts and / or block diagrams of the method, device (system), and computer program product according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to produce a machine, so that the instructions executed by the computer or other programmable data processing devices produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The functions specified in one or more flows and / or blocks

[0155] These computer program instructions can also be stored in a computer readable storage medium that can guide the computer or other programmable data processing devices to work in a specific way, so that the instructions stored in the computer readable storage medium produce a product including instruction devices, which implement the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The functions specified in one or more flows and / or blocks

[0156] These computer program instructions can also be loaded into a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 Figure 1

[0157] Although preferred embodiments of the application have been described herein, it will be apparent to those skilled in the art that various modifications and changes can be made to the embodiments without departing from the spirit and scope of the application. Accordingly, it is intended that all claims be interpreted to include all such modifications and changes as fall within the true spirit and scope of the application.

[0158] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described herein.​​

Claims

1. A method of controlling a cold rolling and continuous annealing annealing line, characterized by, The method comprises: After welding the previous strip steel and the current strip steel in the entry section of the cold rolling continuous annealing production line, the current strip steel is controlled to be transported into the entry looper at a first speed less than the maximum speed, and the entry looper is controlled to increase to a first looper capacity less than the maximum looper capacity and keep; Monitoring the actual remaining length of the current strip steel on the target uncoiler; After the actual remaining length of the current strip steel on the target uncoiler is equal to the tail warning length, the speed of the current strip steel transported into the entry looper is controlled to decrease until stopping, and the capacity of the entry looper is controlled to follow the production speed adjustment of the process section of the cold rolling continuous annealing production line; The target slitting shear of the entry section is controlled to cut the tail of the current strip steel, and the current strip steel is welded with the next strip steel; The current strip steel is taken as the new previous strip steel, and the next strip steel is taken as the new current strip steel, and the steps of controlling the current strip steel to be transported into the entry looper at a first speed less than the maximum speed, and controlling the entry looper to increase to a first looper capacity less than the maximum looper capacity and keep are returned to be executed for the new previous strip steel and the new current strip steel; After monitoring the actual remaining length of the current strip steel on the target uncoiler, the method further comprises: After the actual remaining length of the current strip steel on the target uncoiler is equal to the preset speed-up length, the current strip steel is controlled to be transported into the entry looper at the maximum speed, and the entry looper is controlled to increase to the maximum looper capacity and keep.

2. The method of claim 1, wherein, The step of controlling the speed of the current strip steel transported into the entry looper to decrease until stopping after the actual remaining length of the current strip steel on the target uncoiler is equal to the tail warning length comprises: A first grating device is controlled to monitor the tail of the current strip steel; the first grating device is arranged on the strip steel transmission path between the uncoiler where the current strip steel is located and the corresponding target slitting shear, and the distance between the first grating device and the target slitting shear is greater than a target preset distance; After the first grating device monitors that the tail of the current strip steel passes through the first installation position of the first grating device, the actual distance transported by the tail of the current strip steel after passing through the first grating device is predicted according to the actual transportation speed of the current strip steel; The actual tail length of the current strip steel not passing through the target slitting shear is determined according to the actual distance; After the actual tail length is equal to a target preset length, the speed of the current strip steel transported into the entry looper is controlled to decrease until stopping, so that the actual tail length of the current strip steel not passing through the target slitting shear when the current strip steel stops transporting is greater than or equal to a target reserved length; the target preset length is greater than the target reserved length; and the target reserved length is less than the target preset distance.

3. The method of claim 2, wherein, Before the actual tail length is equal to the target preset length, the method further comprises: A shortest deceleration distance is determined according to the maximum deceleration of the current strip steel transported into the entry looper; The target preset length is determined according to the target reserved length and the shortest deceleration distance.

4. The method of claim 2, wherein, Before the target slitting shear of the entry section is controlled to cut the tail of the current strip, the method further comprises: controlling a second grating device to monitor the tail of the current strip; the second grating device is arranged on a strip conveying path between an uncoiler where the current strip is located and a corresponding target slitting shear, a distance between the second grating device and the target slitting shear is a limit preset distance, and the limit preset distance is less than the target preset distance; after the second grating device monitors that the tail of the current strip passes through a second installation position where the second grating device is located, the current strip is controlled to decelerate at a maximum deceleration until stopping.

5. The method of claim 2, wherein, After the target slitting shear of the entry section is controlled to cut the tail of the current strip, the method further comprises: for a target tail of the current strip after being cut, according to the actual tail length of the target tail, the size of a waste container corresponding to the target slitting shear, and a spacing distance between a target pinch roll before the target slitting shear and the target slitting shear, a target number of cuts of the target tail is determined, so that a plurality of pieces of waste of the target tail obtained after the target tail is cut according to the target number of cuts can fall into the waste container, and the length of the last piece of waste of the target tail is greater than the spacing distance.

6. The method of claim 2, wherein, The actual tail length of the current strip that does not pass through the target slitting shear is determined according to the actual distance, comprising: a second distance between the first grating device and the target slitting shear is subtracted from the actual distance, and a difference obtained is the actual tail length of the current strip that does not pass through the target slitting shear.

7. A cold rolling and continuous annealing annealing line control device, characterized by, The device comprises: a low-speed conveying module, configured to control the current strip to be conveyed into an entry loop at a first speed less than a maximum speed after a previous strip and the current strip are welded in an entry section of a cold rolling continuous annealing production line, and control the entry loop to increase to a first loop capacity less than a maximum loop capacity and remain unchanged; a length monitoring module, configured to monitor an actual remaining length of the current strip on a target uncoiler; a deceleration conveying module, configured to control a speed of the current strip to be conveyed into the entry loop to decrease until stopping when the actual remaining length of the current strip on the target uncoiler is equal to a tail throwing reminding length, and control the loop capacity of the entry loop to follow a production speed of a process section of the cold rolling continuous annealing production line to adjust; a cutting and welding module, configured to control a target slitting shear of the entry section to cut the tail of the current strip, and control the current strip to be welded with a next strip; a cycle module, configured to take the current strip as a new previous strip, take the next strip as a new current strip, and return to execute the step of controlling the current strip to be conveyed into the entry loop at the first speed less than the maximum speed, and controlling the entry loop to increase to the first loop capacity less than the maximum loop capacity and remain unchanged, for the new previous strip and the new current strip. A speed-up transport module for: After monitoring the actual remaining length of the current strip on the target uncoiler, after the actual remaining length of the current strip on the target uncoiler equals a preset speed-up length, controlling the current strip to be transported to the entry loop at a maximum speed, and controlling the entry loop to increase to a maximum loop size and maintain.

8. An electronic device, comprising: Comprise: a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to execute to implement a cold rolling continuous annealing production line control method as claimed in any one of claims 1 to 6. 9.A non-transitory computer readable storage medium, when instructions in the storage medium are executed by a processor of an electronic device, enabling the electronic device to implement a cold rolling continuous annealing production line control method as claimed in any one of claims 1 to 6.

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