Strip steel rolling method, device and equipment

Abstract

The invention discloses a strip steel rolling method, device and equipment, and the method comprises the steps: responding to a damage signal of roller damage, controlling the actual transmission speed of a roller of a tail-section rack in a finishing mill group to be increased to a preset transmission speed, and controlling the actual roller bending force of a working roller of the tail-section rack to be increased to a preset roller bending force; controlling the working roll to move at the damaged position at a preset speed based on the damaged position corresponding to the roll of the damaged signal, and monitoring the moving time of the moving; the to-be-rolled strip steel which does not enter the finishing mill group is controlled to be subjected to steel swing operation at a finish rolling inlet of the finishing mill group, and the steel swing time of the steel swing operation is monitored; under the condition that the steel placing time reaches the first preset time, the to-be-rolled strip steel is controlled to enter a finishing mill group; controlling the working roller to stop moving under the condition that the moving time reaches second preset time; the second preset time is longer than the first preset time. The probability of roller mark defects caused by damaged rollers on follow-up strip steel is reduced on line, and the continuous operation capacity of a production line is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metallurgical process, and in particular to a strip rolling method, device and equipment. BACKGROUND

[0002] In the strip rolling process, problems such as tail swing, head folding and impact damage are prone to occur, which causes damage to the roll surface. Rolling the strip with the damaged roll surface will cause roll mark defects on the strip surface.

[0003] In the traditional solution, the damaged roll is usually replaced by stopping production, which reduces the operation rate of the production line. Therefore, how to reduce the probability of roll mark defects caused by the damaged roll on the subsequent strip is a technical problem that needs to be solved at present. SUMMARY

[0004] The embodiments of the present application provide a strip rolling method, device and equipment, which solve the technical problem of reducing the operation rate of the production line caused by interrupting production to replace the damaged roll in the prior art, and achieve the technical effect of reducing the probability of roll mark defects caused by the damaged roll on the subsequent strip.

[0005] In a first aspect, the present application provides a strip rolling method, comprising:

[0006] In response to a damaged signal of the damaged roll, the actual driving speed of the roll of the last stand of the finishing mill train is controlled to increase to a preset driving speed, and the actual bending force of the work roll of the last stand is controlled to increase to a preset bending force;

[0007] Based on the damaged position of the roll corresponding to the damaged signal, the work roll is controlled to move at a preset speed at the damaged position, and the movement time of the movement is monitored;

[0008] The strip to be rolled which has not entered the finishing mill train is controlled to perform a strip swinging operation at the finishing mill entrance of the finishing mill train, and the swinging time of the strip swinging operation is monitored;

[0009] In the case where the swinging time reaches a first preset time, the strip to be rolled is controlled to enter the finishing mill train;

[0010] In the case where the movement time reaches a second preset time, the movement of the work roll is controlled to stop; the second preset time is greater than the first preset time.

[0011] In some embodiments of the present application, based on the foregoing scheme, the damaged signal is obtained by the following steps:

[0012] Detecting whether the roll appears at least one of the strip folding, the strip tail swing and the strip impact damage;

[0013] In the case where the roll appears damage, the damaged signal is generated.

[0014] In some embodiments of the present application, based on the foregoing scheme, the finishing mill train sequentially comprises, in the rolling direction: the first stand, the second stand, the third stand, the fourth stand, the fifth stand, the sixth stand, and the seventh stand; and the last-stage stand comprises the fifth stand, the sixth stand, and the seventh stand.

[0015] In some embodiments of the present application, based on the foregoing scheme, the preset transmission speed is 80% of the maximum transmission speed corresponding to the last-stage stand.

[0016] In some embodiments of the present application, based on the foregoing scheme, the preset bending force is within 2000-2800 KN.

[0017] In some embodiments of the present application, based on the foregoing scheme, the first preset time is within 30-80 seconds, and the second preset time is 80 seconds.

[0018] In some embodiments of the present application, based on the foregoing scheme, the preset speed is within 10-20 mm / s.

[0019] In some embodiments of the present application, based on the foregoing scheme, based on the damaged position corresponding to the damaged signal, the work roll is controlled to move at the preset speed at the damaged position, comprising:

[0020] The damaged position is determined to determine a moving range with the damaged position as a base point;

[0021] The work roll is controlled to move periodically at the preset speed within the moving range.

[0022] In a second aspect, the present application provides a strip rolling device, comprising:

[0023] A speed and bending force control module is configured to, in response to a damaged signal of a damaged roll, control an actual transmission speed of the roll of a last-stage stand in the finishing mill train to increase to a preset transmission speed, and control an actual bending force of a work roll of the last-stage stand to increase to a preset bending force;

[0024] A moving control module is configured to, based on the damaged signal, control the work roll to move at a preset speed at a damaged position corresponding to the damaged roll, and monitor a moving time of the moving;

[0025] A steel tilting control module is configured to control a to-be-rolled strip that has not entered the finishing mill train to perform a steel tilting operation at a finishing mill inlet of the finishing mill train, and monitor a tilting time of the steel tilting operation;

[0026] A strip control module is configured to, in a case where the tilting time reaches a first preset time, control the to-be-rolled strip to enter the finishing mill train;

[0027] The shift stop control module is configured to control the work roll to stop shifting when the shift time reaches a second preset time, and the second preset time is greater than the first preset time.

[0028] In a third aspect, the present application provides an electronic device, comprising:

[0029] a processor;

[0030] a memory for storing processor-executable instructions;

[0031] The processor is configured to execute to implement the strip rolling method as provided in the first aspect.

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

[0033] The strip rolling method provided in the embodiments of the present application comprises: in response to a damaged signal of a damaged roll, controlling an actual transmission speed of a roll of a last stand in a finishing rolling mill to increase to a preset transmission speed, and controlling an actual bending force of a work roll of the last stand to increase to a preset bending force; based on the damaged signal at a damaged position corresponding to the roll, controlling the work roll to shift at a preset speed at the damaged position, and monitoring a shift time of the shift; controlling a to-be-rolled strip that has not entered the finishing rolling mill to perform a strip swinging operation at a finishing rolling inlet of the finishing rolling mill, and monitoring a swinging time of the strip swinging operation; in a case where the swinging time reaches a first preset time, controlling the to-be-rolled strip to enter the finishing rolling mill; in a case where the shift time reaches a second preset time, controlling the work roll to stop shifting; and the second preset time is greater than the first preset time.

[0034] It can be seen that, by increasing the transmission speed of the roll and the bending force of the work roll to enhance the friction between the rolls and thereby grind the damaged position, and by periodically controlling the work roll to shift axially based on the damaged position, the embodiments of the present application can accurately disperse local stress and promote self-repair. By monitoring the swinging time and the shift time, it is ensured that the strip after the strip swinging operation enters the finishing rolling mill to contact the repaired roll, the probability of causing roll mark defects on the subsequent strip by the damaged roll is reduced online, the frequency of unplanned roll replacement is reduced, the continuous operation capability of the production line is ensured, and the surface quality consistency of the thin-gauge product is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0036] Figure 1A structural principle schematic diagram of a strip steel rolling production line provided for an embodiment of the present application;

[0037] Figure 2 A structural principle schematic diagram of a finishing rolling mill provided for an embodiment of the present application;

[0038] Figure 3 A flow schematic diagram of a strip steel rolling method provided for an embodiment of the present application;

[0039] Figure 4 A structural schematic diagram of a strip steel rolling device provided for an embodiment of the present application;

[0040] Figure 5 A structural schematic diagram of an electronic device provided for an embodiment of the present application. DETAILED DESCRIPTION

[0041] The embodiment of the present application provides a strip steel rolling method, and solves the technical problem of reduced operation rate of a production line due to interrupted production for replacing a damaged rolling mill in the prior art.

[0042] The technical scheme of the embodiment of the present application is to solve the above technical problem, and the general idea is as follows:

[0043] The embodiment of the present application provides a strip steel rolling method, and the method comprises the following steps: in response to a damaged signal of a damaged rolling mill, increasing an actual transmission speed of a rolling mill in a last section of a finishing rolling mill to a preset transmission speed, and increasing an actual bending force of a work roll in the last section to a preset bending force; based on a damaged position corresponding to the damaged rolling mill, controlling the work roll to move at a preset speed at the damaged position, and monitoring a moving time of the work roll; controlling a to-be-rolled strip steel that has not entered the finishing rolling mill to perform a steel swinging operation at a finishing rolling entrance of the finishing rolling mill, and monitoring a swinging time of the steel swinging operation; in a case where the swinging time reaches a first preset time, controlling the to-be-rolled strip steel to enter the finishing rolling mill; in a case where the moving time reaches a second preset time, controlling the work roll to stop moving; and the second preset time is greater than the first preset time.

[0044] It can be seen that, by increasing the transmission speed of the rolling mill and the bending force of the work roll, the embodiment of the present application enhances the friction between the rolling mills to grind the damaged position, and simultaneously controls the work roll to move periodically in the axial direction based on the damaged position, disperses local stress accurately, and promotes self-repair. By monitoring the swinging time and the moving time, it is ensured that the to-be-rolled strip steel after the steel swinging operation enters the finishing rolling mill to contact the repaired rolling mill, the probability of causing a rolling mark defect on the subsequent strip steel by the damaged rolling mill is reduced online, the frequency of unplanned rolling mill replacement is reduced, the continuous operation capability of the production line is ensured, and the surface quality consistency of the thin-gauge product is significantly improved.

[0045] For better understanding of the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings of the specification and specific embodiments.

[0046] First, the term "and / or" appearing in this paper is only a description of the association relationship of the associated objects, which means that there are three kinds of relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are an "or" relationship.

[0047] It should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0048] In the field of hot rolling strip steel thin gauge rolling, due to the decrease of strip steel thickness, the temperature drop is accelerated and the rolling force is significantly increased, and serious problems such as tail whipping, head folding and impact damage frequently occur in the rolling process. Tail whipping is characterized by the fact that the tail of the strip steel deviates sharply and impacts the roll obliquely after rubbing against the detection equipment; folding is caused by the fact that the strip steel deviates excessively to form a double-layer structure and is forced into the roll gap; impact damage is caused by the fact that the head of the low-temperature strip steel hits the roll inlet cone area non-perpendicularly.

[0049] These faults cause steel adhesion, local pits and crack propagation on the roll surface, and then produce periodic roll mark defects and transfer to the surface of the subsequent strip steel, which seriously restricts the continuous production capacity and quality stability of thin gauge products. The last section of the finishing mill group is an important production equipment for the final forming and surface quality control of the strip steel, but tail whipping, head folding and impact damage often occur in the last section, thereby directly causing quality defects of batch strip steel.

[0050] The traditional solution relies on replacing damaged rolls or offline grinding, which not only interrupts production, resulting in reduced production line operation rate, but also causes the strip steel biting stability in the opening stage to deteriorate simultaneously, resulting in an increase in opening scrap rate.

[0051] To solve the above problems, the present application provides a strip steel rolling method, which is applied to a strip steel rolling production line provided by the present application.

[0052] First, the strip steel rolling production line provided by the present application is described. As shown in Figure 1As shown, a structural principle schematic diagram of a strip rolling production line is provided in the embodiment, and the strip rolling production line includes, in sequence along a rolling direction, a heating furnace, a rough descaling machine, a presser, a first rolling mill R1, an induction heating furnace, a second rolling mill R2, a temperature maintaining cover, a coil box, an edge induction heating furnace, a rotary drum flying shear, a fine descaling machine, a finishing rolling mill group, an instrument house, a laminar cooling machine and a coiler group.

[0053] In the production line, the strip is first subjected to soaking treatment in the heating furnace, and after the initial oxide scale is removed by the rough descaling machine, the initial parameters are detected by the presser. Subsequently, the strip is subjected to preliminary thickness compression by the first rolling mill R1, and after the temperature drop is compensated by the induction heating furnace, the strip is subjected to secondary deformation by the second rolling mill R2. The strip maintains temperature uniformity by passing through the temperature maintaining cover, and temporary coiling and uncoiling are completed in the coil box, and then the strip is precisely controlled in temperature by the edge induction heating furnace. After the irregular head and tail are cut off by the rotary drum flying shear, the surface oxide layer is cleaned again by the fine descaling machine, and then the strip is subjected to high-precision rolling by the finishing rolling mill group. As shown, the finishing rolling mill group is composed of first to seventh stands (F1-F7) in sequence along the rolling direction, and each stand is connected in series to realize continuous thinning and shape control of the strip. The front stands (F1-F4) are mainly responsible for large thickness reduction, and the rear stands (F5-F7) are mainly responsible for final size precision and surface quality optimization. The rolled strip is detected in real time by the instrument house, and is subjected to staged controlled cooling by the laminar cooling machine, and finally a steel coil is formed by the coiler. Figure 2

[0054] As the core process equipment, the finishing rolling mill group realizes the deformation of the strip from the intermediate blank to the target thin specification product in stages through the seven stands. And since the rear stands (including the fifth stand, the sixth stand and the seventh stand) of the finishing rolling mill group are responsible for the final forming and surface quality control, a strip rolling method provided in the subsequent embodiment is needed to be applied to reduce the probability of the occurrence of roll mark defects caused by damaged rolls on the subsequent strip.

[0055] In the finishing rolling mill group, each stand includes upper and lower symmetrically arranged work rolls and backup rolls. As shown, the smaller radius cylinder represents the work roll, and the larger radius cylinder represents the backup roll. The work roll directly contacts the strip to implement plastic deformation, and the backup roll is installed outside the work roll to support the work roll against bending deformation caused by rolling force, and simultaneously transmit the axial load applied by the hydraulic bending roll system. Figure 2 Figure 2 The work roll is also provided with a roll shifting mechanism to dynamically adjust the position (shift) along the axial direction to optimize the roll gap contact state. It should be noted that the axial direction refers to the extension direction along the geometric center line of the work roll itself, or in other words, the straight line direction parallel to the rotation center line of the roll.

[0056]

[0057] ​​​After the above description of the strip rolling production line, the following continues to introduce a strip rolling method provided by the embodiment of the application.

[0058] As shown in FIG. 1, a flowchart of a strip rolling method provided by the embodiment of the application includes steps S1-S5. Figure 3

[0059] Step S1, in response to a damaged signal of a damaged roll, the actual transmission speed of the roll of the last stand in the finishing rolling mill is controlled to increase to a preset transmission speed, and the actual bending force of the work roll of the last stand is controlled to increase to a preset bending force;

[0060] Step S2, based on the damaged signal, the work roll is controlled to shift at a preset speed at the damaged position of the roll, and the shifting time of the shifting is monitored;

[0061] Step S3, the strip to be rolled which has not entered the finishing rolling mill is controlled to perform a strip swinging operation at the finishing rolling inlet of the finishing rolling mill, and the swinging time of the strip swinging operation is monitored;

[0062] Step S4, in the case where the swinging time reaches a first preset time, the strip to be rolled is controlled to enter the finishing rolling mill;

[0063] Step S5, in the case where the shifting time reaches a second preset time, the work roll is controlled to stop shifting; the second preset time is greater than the first preset time.

[0064] Regarding step S1, in response to a damaged signal of a damaged roll, the actual transmission speed of the roll of the last stand in the finishing rolling mill is controlled to increase to a preset transmission speed, and the actual bending force of the work roll of the last stand is controlled to increase to a preset bending force.

[0065] The damaged signal is obtained through steps S11-S12:

[0066] Step S11, it is detected whether at least one damage of strip folding, strip tailing and strip impact damage occurs to the roll;

[0067] Step S12, in the case where damage occurs to the roll, a damaged signal is generated.

[0068] Regarding step S11, the strip folding refers to that the edge or head is folded due to strip deviation, forming a double-layer structure which is forced to enter the roll gap, and an axial pit is generated on the roll surface.

[0069] The strip tailing refers to that the tail of the strip loses stability and swings, scratches the equipment, and impacts the roll obliquely, causing scratches and point-shaped peeling on the roll surface.

[0070] The strip impact damage refers to that the head of the low-temperature strip is not vertically bitten, and a radial micro-crack is caused by impacting the shoulder of the work roll. ​

[0071] For example, when the sensor (such as a vibration monitor, a visual detection system) captures a characteristic signal (such as an abnormal vibration spectrum, an image deformation) of any of the above damaged conditions, a damaged signal is generated.

[0072] Regarding step S1, in response to the damaged signal of the damaged roll, the actual driving speed of the roll in the last stand of the finishing mill train is controlled to increase to a preset driving speed, and the actual bending force of the work roll in the last stand is controlled to increase to a preset bending force.

[0073] The actual driving speed of the roll (including the work roll and the backup roll) refers to the real-time rotational linear speed (m / min) of the roll, and the preset driving speed refers to the target speed calculated according to the process requirements for stabilizing the roll surface state in the repair stage. The actual driving speed is increased to the preset driving speed in order to reduce the repeated pressure on the damage point and maintain the stable rotation of the roll surface.

[0074] The actual bending force of the work roll refers to the force applied to the work roll by the hydraulic system, and the preset bending force refers to the target pressure set for damage repair. The actual bending force is increased to the preset bending force in order to increase the contact pressure between the work roll and the backup roll, so that the contact interface between the work roll and the backup roll is strengthened to realize the self-grinding of the roll surface, so as to peel off the roll surface and flatten the small pits.

[0075] For example, the preset driving speed is 80% of the maximum driving speed corresponding to the last stand (for example, if the maximum driving speed is 1200 m / min, the preset driving speed is 960 m / min), and the preset bending force is within 2000-2800 KN (usually 1.2-1.5 times of the normal rolling bending force). It can be understood that the greater the preset bending force, the greater the contact pressure between the work roll and the backup roll, and the better the self-grinding effect of the roll surface.

[0076] Regarding step S2, based on the damaged position corresponding to the damaged signal, the work roll is controlled to move at a preset speed at the damaged position, and the movement time of the movement is monitored.

[0077] Based on the damaged position corresponding to the damaged signal, the work roll is controlled to move at a preset speed at the damaged position, including steps S21-S22.

[0078] Step S21, determining a movement interval with the damaged position as a base point based on the damaged position;

[0079] Step S22, controlling the work roll to move periodically at a preset speed within the movement interval.

[0080] Regarding step S21, the damaged position refers to the precise axial coordinate of the physical damage (folding or tailing or impact damage) on the roll surface, which can be located in real time by sensors (such as thermal imagers, vibration probes) when detecting folding, tailing or impact damage. The movement range refers to the axial movement range with the axial coordinate of the damaged position as the base point P0, for example, the movement range is [P0-50mm, P0+50mm].

[0081] Regarding step S22, periodic movement refers to the reciprocating axial movement of the work roll within the movement range (such as P0-50mm→P0→P0+50mm→P0 cycle). Exemplarily, the preset speed is within 10mm / s-20mm / s. It can be understood that the faster the preset speed, the faster the self-grinding efficiency achieved by the movement.

[0082] By controlling the work roll to move periodically within the movement range, a transverse micro-slip is generated with the backup roll to achieve a self-grinding effect, which to some extent eliminates the sticking and micro-dents of the roll caused by folding, tailing or impact damage.

[0083] Regarding step S3, the control of the to-be-rolled strip that has not entered the finishing rolling mill is carried out at the finishing rolling entrance of the finishing rolling mill, and the swing time of the swing operation is monitored.

[0084] The finishing rolling entrance refers to the transition area (usually 3-5 meters away from the first stand F1) in front of the first stand F1 of the finishing rolling mill, between the finishing descaling device and the first stand.

[0085] The swing operation refers to pausing the delivery of the strip to the finishing rolling mill, so that the to-be-rolled strip is kept stationary or low-speed micro-movement at the finishing rolling entrance. At the same time of the swing operation, the rolls of the first stand to the fourth stand (F1-F4) in the finishing rolling mill continue to run.

[0086] The swing operation is to avoid secondary defect transmission caused by new strip entering the damaged stand, and to continue the rolling process (the rough rolling stage can continue to produce strip).

[0087] Regarding step S4, in the case where the swing time reaches the first preset time, the to-be-rolled strip is controlled to enter the finishing rolling mill.

[0088] Exemplarily, the first preset time is within 30 seconds-80 seconds. After the to-be-rolled strip enters the finishing rolling mill, it needs to complete the corresponding rolling process in the first stand to the fourth stand. Before entering the fifth stand, the rolls of the last stand have completed the self-repairing movement, and the new strip contacts the repaired roll surface, thereby avoiding roll mark transmission.

[0089] Regarding step S5, in the case where the movement time reaches the second preset time, the work roll is controlled to stop moving; the second preset time is greater than the first preset time.

[0090] The second preset time is 80 seconds for example. Making the second preset time greater than the first preset time can ensure that the new strip steel re-entering the finishing rolling mill group contacts the repaired roll surface after entering the last stand.

[0091] For example, at system running time t0, in response to the damaged signal, the actual driving speed of the roll of the last stand in the finishing rolling mill group is controlled to increase to the preset driving speed, the actual bending force of the work roll of the last stand is controlled to increase to the preset bending force, the work roll is controlled to move at the damaged position at the preset speed, and the strip steel to be rolled that has not entered the finishing rolling mill group is controlled to perform a strip swinging operation at the finishing rolling entrance of the finishing rolling mill group. At system running time t0+t1s, the strip steel to be rolled is controlled to enter the finishing rolling mill group, and t1∈[30, 80). At system running time t0+80s, the work roll is controlled to stop moving.

[0092] It should be noted that, at the same time when the work roll is controlled to stop moving, the actual driving speed of the roll of the last stand is also controlled to decrease from the preset driving speed to the driving speed corresponding to the normal production process, and the actual bending force of the work roll is controlled to decrease from the preset bending force to the bending force corresponding to the normal production process, so as to restore the finishing rolling mill group to the normal production process and continue to roll the subsequent strip steel entering the finishing rolling mill group according to the production plan.

[0093] In summary, the strip rolling method provided in the embodiments of the present application includes: in response to a damaged signal of a damaged roll, controlling the actual driving speed of the roll of the last stand in the finishing rolling mill group to increase to a preset driving speed, and controlling the actual bending force of the work roll of the last stand to increase to a preset bending force; based on the damaged position of the roll, controlling the work roll to move at the damaged position at a preset speed, and monitoring a moving time of the moving; controlling the strip steel to be rolled that has not entered the finishing rolling mill group to perform a strip swinging operation at the finishing rolling entrance of the finishing rolling mill group, and monitoring a swinging time of the strip swinging operation; in the case where the swinging time reaches a first preset time, controlling the strip steel to be rolled to enter the finishing rolling mill group; in the case where the moving time reaches a second preset time, controlling the work roll to stop moving; and the second preset time is greater than the first preset time.

[0094] It can be seen that, by increasing the driving speed of the roll and the bending force of the work roll to enhance the friction between the rolls and thereby grind the damaged position, and by periodically moving the work roll based on the damaged position to accurately disperse local stress and promote self-repair, the swinging time and the moving time are monitored to ensure that the strip steel after the strip swinging operation enters the finishing rolling mill group to contact the repaired roll, the probability of the damaged roll causing roll mark defects on the subsequent strip steel is reduced online, the frequency of unplanned roll replacement is reduced, the continuous operation capability of the production line is ensured, and the surface quality consistency of the thin-gauge product is significantly improved.

[0095] Based on the same inventive concept, the embodiment of the present application also provides a kind of electronic equipment as shown in Figure 4 The strip rolling device shown in the figure comprises:

[0096] The speed and bending force control module 41 is configured to control the actual driving speed of the roll of the last stand of the finishing rolling mill to increase to the preset driving speed and control the actual bending force of the work roll of the last stand to increase to the preset bending force in response to the damaged signal of the damaged roll.

[0097] The shift control module 42 is configured to control the work roll to shift at the preset speed at the damaged position based on the damaged signal at the damaged position of the roll, and monitor the shift time of the shift.

[0098] The roll shifting control module 43 is configured to control the to-be-rolled strip that has not entered the finishing rolling mill to perform roll shifting operation at the finishing rolling inlet of the finishing rolling mill, and monitor the roll shifting time of the roll shifting operation.

[0099] The strip control module 44 is configured to control the to-be-rolled strip to enter the finishing rolling inlet in the case where the roll shifting time reaches the first preset time.

[0100] The shift stop control module 45 is configured to control the work roll to stop shifting in the case where the shift time reaches the second preset time; the second preset time is greater than the first preset time.

[0101] Further, the device further comprises a damaged signal generation module configured to:

[0102] detect whether the roll appears at least one of strip folding, strip tailing and strip impact damage;

[0103] generate the damaged signal in the case where the roll appears damage.

[0104] Further, the device further comprises a periodic control module configured to:

[0105] determine the shift interval based on the damaged position, with the damaged position as the base point;

[0106] control the work roll to periodically shift at the preset speed within the shift interval.

[0107] Based on the same inventive concept, the embodiment of the present application also provides a kind of electronic equipment as shown in Figure 5 The electronic equipment comprises:

[0108] a processor 51;

[0109] a memory 52 for storing instructions executable by the processor 51;

[0110] The processor 51 is configured to execute to implement the strip rolling method provided in the foregoing.

[0111] Based on the same inventive concept, the embodiment of the present application also provides a non-transitory computer readable storage medium, when instructions in the storage medium are executed by the processor 51 of the electronic device, the electronic device can execute a strip rolling method as provided in the foregoing.

[0112] Since the electronic device introduced in the embodiment is the electronic device used to implement the information processing method in the embodiment of the present application, based on the information processing method introduced in the embodiment of the present application, those skilled in the art can understand the specific implementation of the electronic device in the embodiment and its various forms, so the electronic device how to implement the method in the embodiment of the present application is not introduced in detail. As long as the electronic device used to implement the information processing method in the embodiment of the present application is implemented by those skilled in the art, it belongs to the scope of the present application.

[0113] 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 adopt a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer usable storage media containing computer usable program code (including but not limited to disk storage, CD-ROM, optical storage, etc.).

[0114] The present application is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to 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 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 apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus 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 means for performing the functions specified in one or more flows and / or blocks.

[0115] These computer program instructions can also be stored in a computer readable storage medium that can guide the computer or other programmable data processing apparatus to work in a specific way, so that the instructions stored in the computer readable storage medium produce a product including instruction means, which 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 means for performing the functions specified in one or more flows and / or blocks.

[0116] 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 one or more flowcharts and / or blocks Figure 1 one or more flowcharts and / or blocks

[0117] Although preferred embodiments of the application have been described herein, it will be apparent to those skilled in the art that various modifications can be made within the scope of the application without departing from the spirit of the application. Accordingly, it is intended that all such possible modifications be included within the scope of the application as claimed.

[0118] 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 rolling a strip of steel, characterized in that, The method comprises: in response to a damaged signal of a damaged roll, increasing an actual transmission speed of the roll of a last stand in a finishing rolling mill to a preset transmission speed, and increasing an actual bending force of a work roll of the last stand to a preset bending force; based on the damaged position corresponding to the damaged roll, controlling the work roll to move at a preset speed at the damaged position, and monitoring a moving time of the moving; controlling a to-be-rolled strip that has not entered the finishing rolling mill to perform a swing operation at an entrance of the finishing rolling mill, and monitoring a swing time of the swing operation; in a case where the swing time reaches a first preset time, controlling the to-be-rolled strip to enter the finishing rolling mill; in a case where the moving time reaches a second preset time, controlling the work roll to stop the moving; and the second preset time is greater than the first preset time.

2. The strip steel rolling method according to claim 1, characterized by, The damaged signal is obtained by: detecting whether at least one of strip folding, strip tailing and strip impact damage occurs to the roll; in a case where damage occurs to the roll, generating the damaged signal.

3. The strip steel rolling method according to claim 1, characterized by, The finishing rolling mill comprises, in sequence along a rolling direction, a first stand, a second stand, a third stand, a fourth stand, a fifth stand, a sixth stand and a seventh stand; and the last stand comprises the fifth stand, the sixth stand and the seventh stand.

4. The strip steel rolling method according to claim 1, characterized by, The preset transmission speed is 80% of a maximum transmission speed corresponding to the last stand.

5. The strip rolling method as recited in claim 1, wherein The preset bending force is within 2000-2800 KN.

6. The strip rolling method as recited in claim 1, wherein The first preset time is within 30-80 seconds, and the second preset time is 80 seconds.

7. The strip rolling method as recited in claim 1, wherein The preset speed is within 10-20 mm / s.

8. The strip rolling method as recited in claim 1, wherein The controlling the work roll to move at the preset speed at the damaged position based on the damaged signal at the damaged position corresponding to the damaged roll comprises: determining a moving interval with the damaged position as a base point based on the damaged position; controlling the work roll to periodically move at the preset speed within the moving interval.

9. A strip steel rolling device, characterized by comprising: The method comprises: a speed and bending force control module, configured to, in response to a damaged signal of a damaged roll, increase an actual transmission speed of the roll of a last stand in a finishing rolling mill to a preset transmission speed, and increase an actual bending force of a work roll of the last stand to a preset bending force; a moving control module, configured to, based on the damaged signal at a damaged position corresponding to the damaged roll, control the work roll to move at a preset speed at the damaged position, and monitor a moving time of the moving; a swing control module, configured to control a to-be-rolled strip that has not entered the finishing rolling mill to perform a swing operation at an entrance of the finishing rolling mill, and monitor a swing time of the swing operation; a strip control module, configured to, in a case where the swing time reaches a first preset time, control the to-be-rolled strip to enter the finishing rolling mill; a moving stop control module, configured to, in a case where the moving time reaches a second preset time, control the work roll to stop the moving; and the second preset time is greater than the first preset time.

10. An electronic device, comprising: The method comprises: a processor; a memory for storing instructions executable by the processor; and The processor is configured to implement a strip rolling method as claimed in any one of claims 1 to 8. The processor is configured to implement a strip rolling method as claimed in any one of claims 1 to 8.

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