Strip shape control system and strip shape control method

Abstract

The invention provides a strip shape control system and a strip shape control method, and relates to the technical field of rolling mill control, a roller heat degree adjusting device in the system comprises electromagnetic induction heating modules and a temperature detector, the heating range of the multiple electromagnetic induction heating modules covers a roller body of a working roller, and the temperature detector is used for detecting the temperature of the working roller. The plurality of temperature detectors are respectively used for detecting temperatures at different positions of the roller body so as to obtain temperature field distribution data of the roller body and transmit the temperature field distribution data to the plate shape controller; the strip shape detection roller is used for making contact with the strip rolled by the working roller so as to obtain strip shape data of the current strip and transmit the strip shape data to the strip shape controller. And the plate shape controller is used for adjusting the working state of the electromagnetic induction heating module at the corresponding position according to the temperature field distribution data and the plate shape data. Accurate control over the temperature field of the roller body of the working roller is achieved, resource waste is reduced, and the stability of temperature distribution of the working roller is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rolling mill control, and in particular to a strip shape control system and a strip shape control method. Background Art

[0002] During the cold rolling of strips, the friction between the strip and the working rolls causes the working rolls to heat up. The mill process lubrication and cooling device sprays rolling oil on the rolls to cool down the working rolls to ensure that the working rolls form a stable thermal crown. However, after the working rolls do not contact the strips, there is no friction with the strips to generate a heat source, which causes the temperature of the rolls to drop after the working rolls are separated from the strips, resulting in uneven distribution of the thermal crown of the working rolls. The uneven distribution of thermal crowns will cause subsequent strips to have plate shape problems such as tight edges, rib waves, and edge cracks, affecting product quality and production efficiency.

[0003] In the prior art, the rolling mill process lubrication and cooling device is used to spray additional rolling oil with a higher temperature onto the working roll body, so that the working roll body maintains a stable thermal convexity during heat transfer. However, the rolling oil spraying range and the flow direction of the rolling oil after spraying are uncontrollable, resulting in uneven temperature adjustment of the working roll body, and a certain temperature loss will occur during the rolling oil spraying process, resulting in low efficiency in heat transfer by the rolling oil spraying. If the temperature of the rolling oil is further increased, it may cause the risk of fire and scalding of workers. In addition, the hot rolling oil spraying will overlap with the conventional process lubrication and cooling rolling oil spraying, affecting the plate shape control effect and causing heat loss and waste. Summary of the invention

[0004] The problem solved by the present invention is how to improve the stability of the temperature distribution of the working roll.

[0005] In order to solve the above problems, the present invention provides a strip shape control system and a strip shape control method.

[0006] In a first aspect, the present invention provides a strip shape control system, comprising a roller heat adjustment device, a shape detection roller and a shape controller, wherein the roller heat adjustment device and the shape detection roller are respectively connected to the shape controller for communication;

[0007] The roller heat adjustment device comprises an electromagnetic induction heating module and a temperature detector, wherein the plurality of electromagnetic induction heating modules are respectively used to heat the working rollers, and the heating range of the plurality of electromagnetic induction heating modules covers the roller body of the working rollers, and the plurality of temperature detectors are respectively used to detect the temperature at different positions of the roller body, so as to obtain the temperature field distribution data of the roller body and transmit it to the plate shape controller;

[0008] The flatness detection roller is used to contact the strip after being rolled by the working roller to obtain the current flatness data of the strip and transmit it to the flatness controller;

[0009] The plate shape controller is used to adjust the working state of the electromagnetic induction heating module at the corresponding position according to the temperature field distribution data and the plate shape data.

[0010] Optionally, the switch, heating power and operating frequency of each electromagnetic induction heating module are individually adjustable.

[0011] Optionally, the rolling roller heat adjustment device also includes a mounting plate, the mounting plate includes a mounting surface facing the working roller, and a plurality of the electromagnetic induction heating modules are arranged at intervals on the mounting surface; and a plurality of the temperature detectors are arranged at intervals on the end surface of the mounting plate away from the strip.

[0012] Optionally, the mounting surface includes a first mounting surface and a second mounting surface, and the angle between the first mounting surface and the second mounting surface is an obtuse angle; a plurality of the electromagnetic induction heating modules are respectively arranged at intervals on the first mounting surface and the second mounting surface, and the plurality of the electromagnetic induction heating modules located on the first mounting surface and the plurality of the electromagnetic induction heating modules located on the second mounting surface are arranged alternately.

[0013] Optionally, the mounting plate includes a first plate body and a second plate body, the first plate body and the second plate body are hinged to each other, the first mounting surface is located on the first plate body, and the second mounting surface is located on the second plate body; a first connecting portion is provided on the first plate body, and a second connecting portion is provided on the second plate body, and the first connecting portion is used to connect with the second connecting portion to fix the first plate body relative to the second plate body.

[0014] Optionally, the strip shape control system further comprises an adjustment mechanism, wherein the adjustment mechanism is connected to the mounting plate and is used for adjusting the position of the mounting plate relative to the working roll.

[0015] Optionally, the adjustment mechanism includes a fixed frame and a telescopic cylinder, the fixed end of the telescopic cylinder is connected to the fixed frame, and the telescopic end of the telescopic cylinder is connected to the mounting plate.

[0016] In a second aspect, the present invention provides a strip shape control method. Based on the strip shape control system as described above, the method comprises:

[0017] The temperature detector obtains the temperature field distribution information of the working roll and sends it to the plate shape controller;

[0018] The flatness detection roller obtains the flatness data of the strip after rolling by the working roller and sends it to the flatness controller;

[0019] The plate shape controller generates a corresponding adjustment strategy according to the temperature field distribution information and the plate shape data, and controls multiple electromagnetic induction heating modules to heat the working roll according to the adjustment strategy until the plate shape data meets the standard plate shape data, wherein the adjustment strategy includes if the temperature field distribution information does not meet the standard temperature field distribution, and the plate shape data at the corresponding position does not meet the standard plate shape data, then obtaining the target heating temperature according to the plate shape data at the corresponding position and the temperature field distribution information at the corresponding position, and controlling the electromagnetic induction heating module at the corresponding position to heat to the target heating temperature.

[0020] Optionally, the strip shape control system further includes a rolling mill roll bending device, a transverse adjustment device and a segmented cooling device, the rolling mill roll bending device is in contact with the working roll, the transverse adjustment device is in contact with the strip before rolling by the working roll, and the segmented cooling device is arranged corresponding to the roll body of the working roll; the strip shape control method further includes:

[0021] If the plate shape data does not conform to the standard plate shape data, a target bending amount is obtained according to the plate shape data at a corresponding position and the temperature field distribution information at a corresponding position, and the rolling mill roll bending device at the corresponding position is controlled to adjust the working roll according to the target bending amount;

[0022] If the plate shape data does not conform to the standard plate shape data, a target lateral displacement is obtained according to the plate shape data at the corresponding position and the temperature field distribution information at the corresponding position, and the lateral displacement adjustment device at the corresponding position is controlled to adjust the strip according to the target lateral displacement;

[0023] If the current temperature at any position on the working roll is greater than the standard temperature at the corresponding position, and the plate shape data at the corresponding position does not conform to the standard plate shape data, the target cooling temperature is obtained according to the plate shape data at the corresponding position and the current temperature at the corresponding position, and the corresponding position on the working roll is controlled to be cooled to the target cooling temperature through the segmented cooling device at the corresponding position, wherein the temperature field distribution information includes the current temperatures at multiple positions on the working roll, and the standard temperature field distribution includes the standard temperatures at multiple positions on the working roll.

[0024] Optionally, before the temperature detector acquires the temperature field distribution information of the working roll and sends it to the plate shape controller, the method further includes:

[0025] Acquiring the previous operating parameters of the working roll and the target shape of the strip before the operation;

[0026] The current operation strategy is obtained according to the operation parameters, the target plate shape and a preset strategy generation model, wherein the strategy generation model is obtained by training a preset model according to the historical operation data of the working roll and the historical plate shape data of the strip;

[0027] The operation of the electromagnetic induction heating module is controlled according to the current operation strategy.

[0028] The beneficial effects of the strip shape control system of the present invention are as follows: a roller heat adjustment device and a shape detection roller are respectively connected to the shape controller for communication, the shape detection roller contacts the rolled strip and obtains the shape data after rolling and sends it to the shape controller to monitor the shape rolling quality. The roller thermal convexity adjustment device includes a temperature detector and an electromagnetic induction heating module. The multiple temperature detectors are used to obtain the temperature at different positions of the roller body, and the obtained temperature field distribution data of the roller body are sent to the shape controller to monitor the temperature state of the working roller. Multiple electromagnetic induction heating modules are arranged in an interlaced manner, and the heating range covers the roller body of the working roller. The shape controller can analyze the temperature field of the roller body of the working roller according to the obtained shape data and temperature field distribution data to adjust the working state of the electromagnetic induction heating module, realize accurate control of the temperature field of the roller body of the working roller, reduce resource waste, and improve the stability of the temperature distribution of the working roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a strip shape control system according to an embodiment of the present invention;

[0030] Figure 2 Schematic diagram of the installation of the strip shape control system and the working roll according to the embodiment of the present invention Figure 1 ;

[0031] Figure 3 It is a schematic structural diagram of a plate shape detection roller and a strip material according to an embodiment of the present invention;

[0032] Figure 4 Schematic diagram of the installation of the strip shape control system and the working roll according to the embodiment of the present invention Figure 2 ;

[0033] Figure 5 The process diagram of the strip shape control method according to the embodiment of the present invention is as follows Figure 1 ;

[0034] Figure 6 The process diagram of the strip shape control method according to the embodiment of the present invention is as follows Figure 2 .

[0035] Description of reference numerals:

[0036] 1-roller heat adjustment device; 11-electromagnetic induction heating module; 12-temperature detector; 13-mounting plate; 131-first plate body; 132-second plate body;

[0037] 2-plate shape detection roller; 3-plate shape controller; 4-working roller; 5-strip; 6-fixed frame. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0039] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0040] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0041] like Figures 1 to 6 As shown, a strip shape control system provided by an embodiment of the present invention comprises a roller heat adjustment device 1, a shape detection roller 2 and a shape controller 3, wherein the roller heat adjustment device 1 and the shape detection roller 2 are respectively connected to the shape controller 3 for communication;

[0042] The roller heat adjustment device 1 includes an electromagnetic induction heating module 11 and a temperature detector 12. The multiple electromagnetic induction heating modules 11 are respectively used to heat the working rollers 4, and the heating range of the multiple electromagnetic induction heating modules 11 covers the roller body of the working roller 4. The multiple temperature detectors 12 are respectively used to detect the temperature at different positions of the roller body to obtain the temperature field distribution data of the roller body and transmit it to the plate shape controller 3.

[0043] Specifically, Figure 1 As shown, multiple electromagnetic induction heating modules 11 are arranged in a staggered manner. In the length direction of the working roll 4, the coverage range of the multiple electromagnetic induction heating modules 11 is greater than or equal to the length of the working roll 4, so as to ensure that the electromagnetic induction heating modules 11 can cover the roller body of the working roll 4 when heating the roller body of the working roll 4; in the circumferential direction of the working roll 4, the electromagnetic induction heating modules 11 are usually arranged in two rows to ensure that when the electromagnetic induction heating modules 11 in the first row are arranged, the range that cannot be covered by the gap between the two electromagnetic induction heating modules 11 can be covered by the electromagnetic induction heating modules 11 in the second row. In addition, the electromagnetic induction heating modules 11 can also be arranged in a staggered manner in multiple rows, so that the electromagnetic induction heating modules 11 can cover as many parts of the working roll 4 as possible that are not in contact with the strip 5, and the roller body temperature of the working roll 4 is controlled. In order to monitor the roller body temperature of the working roll 4 in real time, multiple temperature detectors 12 are also provided, and in the length direction of the working roll 4, the coverage range of the multiple temperature monitors 12 is greater than or equal to the length of the working roll 4, and the temperature of different positions on the roller body of the working roll 4 can be detected. The temperature detector 12 and the electromagnetic induction heating module 11 are respectively connected to the plate shape controller 3 for communication, or can be electrically connected, and receive the temperature field distribution data transmitted by the temperature detector 12 to control the temperature of the electromagnetic induction heating module 11 at the target position, so as to adjust the temperature of the roller body of the working roller 4. For example, when the temperature detector 12 obtains the temperature field distribution data of the roller body, it is transmitted to the plate shape controller 3. The plate shape controller 3 can generate a temperature map according to the temperature field distribution data and the corresponding position of the temperature detector 12, and determine the temperature state of the electromagnetic induction heating module 1 according to the temperature map to heat the roller body.

[0044] It should be noted that the working roll 4 will vibrate during operation, causing the working roll 4 to be slightly displaced. In order to avoid the electromagnetic induction heating module 11 and the temperature detector 12 from colliding with the working roll 4, causing equipment damage or even an accident, when installing the rolling roll heat adjustment device 1, it is necessary to ensure that a certain distance is left between the roll body and the electromagnetic induction heating module 11 and the temperature detector 12.

[0045] In the prior art, the size of the working roll 4, i.e., the length and diameter, usually does not change significantly. Therefore, the sizes of the existing working rolls 4 on the market can be counted. When setting, the size information of the working roll 4 is comprehensively considered, and the roller heat adjustment device 1 is set. For example, the roll body length of the existing working roll 4 is 1200mm to 1300mm, and the diameter is 860mm to 950mm. The length of the plurality of electromagnetic induction heating modules 11 is 1300mm, and the curvature range can be set to be adjustable according to 860mm to 950mm. A bracket with an adjustable curvature range is set, and the electromagnetic induction heating module 11 is installed on the end face of the bracket facing the working roll 4. The curvature of the bracket is adjusted according to the change in the diameter of the working roll 4 so that the distance between each electromagnetic induction heating module 11 and the roll body of the working roll 4 is equal. Similarly, the temperature detector 12 is also set on the bracket so that the distance between each temperature detector 12 and the roll body of the working roll 4 is equal.

[0046] The flatness detection roller 2 is used to contact the strip 5 after being rolled by the working roller 4 to obtain the current flatness data of the strip 5 and transmit it to the flatness controller 3 .

[0047] The plate shape controller 3 is used to adjust the working state of the electromagnetic induction heating module 11 at the corresponding position according to the temperature field distribution data and the plate shape data.

[0048] Specifically, the plate shape detection roller 2 is arranged behind the working roller 4. Figure 3 As shown, the strip 5 after being rolled by the working roll 4 is in contact with the strip 5, and the rolled strip 5 rolls on the plate shape detection roll 2. The plate shape data of the strip 5 is obtained through the plate shape detection roll 2, and the plate shape detection roll 2 sends the plate shape data to the plate shape controller 3. The plate shape controller 3 determines the position of the roller body of the working roll 4 that needs to adjust the temperature based on the plate shape data and the temperature field distribution data, and controls the working state of the electromagnetic induction heating module 11 at the corresponding position, such as the heating temperature value.

[0049] In this embodiment, a roller heat adjustment device 1 and a flatness detection roller 2 are respectively connected to the flatness controller 3 in communication. The flatness detection roller 2 contacts the rolled strip 5 to obtain the flatness data after rolling and sends it to the flatness controller 3 to monitor the flatness rolling quality. The roller thermal crown adjustment device includes a temperature detector 12 and an electromagnetic induction heating module 11. The multiple temperature detectors 12 are used to obtain the temperature at different positions of the roller body, and send the obtained temperature field distribution data of the roller body to the flatness controller 3 to monitor the temperature state of the working roller 4. A plurality of electromagnetic induction heating modules 11 are staggered, and the heating range covers the roller body of the working roller 4. The plate shape controller 3 can analyze the roller body temperature field of the working roller 4 according to the acquired plate shape data and temperature field distribution data to adjust the working state of the electromagnetic induction heating module 11. For example, if it is determined that the temperature field at position a of the roller body of the working roller 4 is reduced, the electromagnetic induction heating module 11 at the corresponding position a is adjusted to heat the roller body, thereby achieving precise control of the roller body temperature field of the working roller 4, reducing resource waste, and improving the stability of the working roller temperature distribution.

[0050] Optionally, the switch, heating power and operating frequency of each electromagnetic induction heating module 11 are individually adjustable to precisely heat different positions of the roller body of the working roller 4 in different zones.

[0051] Optionally, the rolling roller heat adjustment device 1 also includes a mounting plate 13, the mounting plate 13 includes a mounting surface facing the working roller 4, and a plurality of the electromagnetic induction heating modules 11 are arranged at intervals on the mounting surface; and a plurality of the temperature detectors 12 are arranged at intervals on the end surface of the mounting plate 13 away from the strip 5.

[0052] Specifically, Figure 2 As shown, the roller heat adjustment device 1 also includes a mounting plate 13, which is arranged perpendicular to the strip 5. A plurality of electromagnetic induction heating modules 11 are arranged on the end surface facing the working roll 4 to fix the electromagnetic induction heating modules 11. A plurality of temperature detectors 12 are arranged at intervals on the end surface of the mounting plate 13 away from the strip 5 to fix the temperature detectors 12, thereby ensuring the stability of the electromagnetic induction heating modules 11 and the temperature detectors 12 during the operation of the rolling mill.

[0053] Optionally, the mounting surface includes a first mounting surface and a second mounting surface, and the angle between the first mounting surface and the second mounting surface is an obtuse angle; a plurality of the electromagnetic induction heating modules 11 are respectively arranged at intervals on the first mounting surface and the second mounting surface, and the plurality of the electromagnetic induction heating modules 11 located on the first mounting surface and the plurality of the electromagnetic induction heating modules 11 located on the second mounting surface are arranged alternately.

[0054] Specifically, the first mounting surface and the second mounting surface are set at an obtuse angle, and a plurality of electromagnetic induction heating modules 11 are staggeredly arranged on the first mounting surface and the second mounting surface to ensure that the electromagnetic induction heating modules 11 match the circumferential surface of the working roll 4 .

[0055] In addition, the first mounting surface and the second mounting surface may also be set to a certain curvature, that is, the first mounting surface and the second mounting surface are curvatures, but it should be noted that since the electromagnetic induction heating module 11 has a certain volume, the curvature of the curved surface cannot be too large to avoid collision of the electromagnetic induction heating module 11.

[0056] Optionally, the mounting plate 13 includes a first plate body 131 and a second plate body 132, the first plate body 131 and the second plate body 132 are hinged to each other, the first mounting surface is located on the first plate body 131, and the second mounting surface is located on the second plate body 132; a first connecting portion is provided on the first plate body 131, and a second connecting portion is provided on the second plate body 132, the first connecting portion is used to connect with the second connecting portion to fix the first plate body 131 relative to the second plate body 132.

[0057] During rolling, due to the different target rolling plate shapes and strip materials, the diameters of the working rolls 4 used are different, but the diameter variation range is not large. Figure 2 As shown, the mounting plate 13 is configured as a first plate body 131 and a second plate body 132, the first plate body 131 is provided with a first connecting portion extending toward the end surface of the strip 5 in a direction away from the working roll 4, a connecting hole is provided on the first connecting portion, the second plate body 132 is provided with a second connecting portion extending away from the end surface of the strip 5 in a direction away from the working roll 4, a connecting hole is provided on the second connecting portion, the first plate body 131 and the second plate body 132 are hinged through the connecting holes on the first connecting portion and the second connecting portion, when the diameter of the working roll 4 changes, the angle between the first plate body 131 and the second plate body 132 can be adjusted through the first connecting portion and the second connecting portion to match the curvature of the roller body of the working roll 4, and then the first plate body 131 is fixed relative to the second plate body 132 to ensure that the spacing between the multiple electromagnetic induction heating modules 11 and the multiple temperature detectors 12 and the roller body is equal, thereby improving the versatility of the roller heat adjustment device 1.

[0058] Optionally, the strip shape control system further includes an adjustment mechanism, which is connected to the mounting plate 13 and is used to adjust the position of the mounting plate relative to the working roller 4.

[0059] Specifically, the adjustment mechanism can be an electric push rod, the telescopic part of the electric push rod is connected to the end face of the mounting plate 13 away from the working roll 4. When the rolling mill is not running, the telescopic end of the electric push rod is in a retracted state, and the roll heat adjustment device 1 is away from the working roll 4, which does not affect the installation and replacement of the working roll 4 and the strip 5. When the rolling mill is running, the telescopic end of the electric push rod is extended and retracted, and the roll heat adjustment device 1 is close to the working roll 4, so as to perform temperature detection and temperature adjustment on the operation of the working roll 4.

[0060] Optionally, the adjustment mechanism includes a fixed frame 6 and a telescopic cylinder, wherein the fixed end of the telescopic cylinder is connected to the fixed frame 6 , and the telescopic end of the telescopic cylinder is connected to the mounting plate 13 .

[0061] Specifically, Figure 4 As shown, the adjustment mechanism includes a fixed frame 6, the fixed frame 6 is slidably connected to the mounting plate 13, the end of the fixed frame 6 away from the working roll 4 is connected to the fixed end of the telescopic cylinder, the end of the fixed frame 6 close to the working roll 4 is connected to the two ends of the working roll 4 (for example, a bracket connecting the two ends of the working roll 4), and the telescopic end of the telescopic cylinder is connected to the mounting plate 13 to adjust the distance between the roll heat adjustment device 1 and the working roll 4. When the rolling mill stops running, the telescopic cylinder is in a retracted state, and the mounting plate 13 is at the end of the fixed frame 6 away from the working roll 4, away from the working roll 4. Before the rolling mill starts running, the telescopic cylinder extends, and the mounting plate 13 extends along with the telescopic end, and slides along the fixed frame 6 to the end of the fixed frame close to the working roll 4.

[0062] The embodiment of the present invention further discloses a strip shape control method. Based on the strip shape control system described above, the method includes:

[0063] Step S1, the temperature detector 12 obtains the temperature field distribution information of the working roll 4 and sends it to the plate shape controller 3;

[0064] Step S2, the flatness detection roller 2 obtains the flatness data of the strip 5 after rolling by the working roller 4 and sends it to the flatness controller 3;

[0065] Step S3, the plate shape controller 3 generates a corresponding adjustment strategy according to the temperature field distribution information and the plate shape data, and controls multiple electromagnetic induction heating modules 11 to heat the working roll 4 according to the adjustment strategy until the plate shape data meets the standard plate shape data, wherein the adjustment strategy includes if the temperature field distribution information does not meet the standard temperature field distribution, and the plate shape data at the corresponding position does not meet the standard plate shape data, then obtaining the target heating temperature according to the plate shape data at the corresponding position and the temperature field distribution information at the corresponding position, and controlling the electromagnetic induction heating module 11 at the corresponding position to heat to the target heating temperature.

[0066] In this embodiment, Figure 5As shown, when the rolling mill is running, each device is turned on, and multiple temperature detectors 12 obtain the temperature field distribution information of the roller body of the working roll 4 in real time and send it to the plate shape controller 3 to generate the corresponding plate shape data diagram (a) to monitor the temperature field distribution when the working roll 4 is running. The plate shape detection roller 2 obtains the plate shape data of the strip 5 after rolling by the working roll 4 and sends it to the plate shape controller 3 to monitor the plate shape rolling quality when the working roll 4 is running. The plate shape controller 3 generates a corresponding adjustment strategy based on the temperature field distribution information and the plate shape data, wherein the adjustment strategy includes that when the temperature at the corresponding position in the temperature field distribution information does not conform to the standard temperature field distribution (such as area A), it means that the roller body temperature of the working roll 4 does not conform to the standard, and the rolled plate shape of the strip 5 will have problems, then the target heating temperature is obtained according to the plate shape data at the corresponding position and the temperature field distribution information at the corresponding position, and the electromagnetic induction heating module 11 at the corresponding position is controlled to heat to the target heating temperature, so as to accurately adjust the temperature of the roller body of the working roll 4 at the corresponding position, and then use the plate shape detection roller 2 to obtain the plate shape data of the strip 5 after rolling by the adjusted working roll 4, and generate a plate shape data graph, as shown in Figure (b), until the plate shape data graph conforms to the standard plate shape data, effectively ensuring the stability of the temperature distribution of the working roll 4, thereby improving the rolling quality of the plate shape.

[0067] Optionally, the strip shape control system further includes a rolling mill roll bending device, a transverse adjustment device and a segmented cooling device, the rolling mill roll bending device is in contact with the working roll 4, the transverse adjustment device abuts against the strip 5 before rolling by the working roll 4, and the segmented cooling device is arranged corresponding to the roll body of the working roll 4; the strip shape control method further includes:

[0068] If the plate shape data does not conform to the standard plate shape data, the target bending amount is obtained according to the plate shape data at the corresponding position and the temperature field distribution information at the corresponding position, and the rolling mill bending device at the corresponding position is controlled to adjust the working roll 4 according to the target bending amount.

[0069] Specifically, when it is detected that the plate shape data does not conform to the standard plate shape data, the rolling mill roll bending device is first used to adjust the working roll 4, that is, the target bending amount is obtained according to the plate shape data at the corresponding position and the temperature field distribution information at the corresponding position, and the rolling mill roll bending device at the corresponding position is controlled to adjust the working roll 4 according to the target bending amount. If the adjusted plate shape data still does not conform to the standard plate shape data, the rolling mill roll bending device is restored to the initial data, and further adjusted using the transverse adjustment equipment.

[0070] If the plate shape data does not conform to the standard plate shape data, the target transverse displacement is obtained according to the plate shape data at the corresponding position and the temperature field distribution information at the corresponding position, and the transverse displacement adjustment device at the corresponding position is controlled to adjust the strip according to the target transverse displacement. If the adjusted plate shape data still does not conform to the standard plate shape data, the transverse displacement adjustment device is restored to the initial data, and further adjustment is performed using a segmented cooling device and / or a roller heat adjustment device.

[0071] If the current temperature at any position on the working roll 4 is greater than the standard temperature at the corresponding position, and the plate shape data at the corresponding position does not conform to the standard plate shape data, the target cooling temperature is obtained according to the plate shape data at the corresponding position and the current temperature at the corresponding position, and the corresponding position on the working roll 4 is controlled to be cooled to the target cooling temperature through the segmented cooling device at the corresponding position, wherein the temperature field distribution information includes the current temperatures at multiple positions on the working roll, and the standard temperature field distribution includes the standard temperatures at multiple positions on the working roll.

[0072] Specifically, when the temperature field distribution information is greater than the standard temperature field distribution, it means that the roller body temperature of the working roll 4 is too high. At this time, a segmented cooling device is required to cool the roller body to ensure that the temperature field distribution of the working roll 4 is uniform.

[0073] Optionally, before the temperature detector 12 acquires the temperature field distribution information of the working roll 4 and sends it to the plate shape controller 3, the following steps are further included:

[0074] Obtain the previous operating parameters of the working roll 4 and the target shape of the strip 5 before operation, and generate a shape data graph, such as Figure 6 As shown in the middle figure (c).

[0075] The current operation strategy is obtained according to the operation parameters, the target plate shape and a preset strategy generation model, wherein the strategy generation model is obtained by training a preset model according to historical operation data of the working roll 4 and historical plate shape data of the strip 5.

[0076] The electromagnetic induction heating module 11 is controlled to operate according to the current operation strategy.

[0077] Specifically, Figure 6 As shown, in order to reduce the rolling loss rate of the strip 5, a strategy generation model is adopted. Based on the rolling parameters of the strip 5, the size of the working roll 4 and other data, an operation strategy matching the current rolling of the rolling mill is generated, thereby improving the rolling quality of the strip 5. Among them, the product database of the training strategy generation model is constructed based on the historical operation data and historical plate shape data.

[0078] Additionally, the strip shape control method further comprises:

[0079] Obtaining the size parameters of the working roll 4 during this operation;

[0080] Determine the target spacing according to the size parameters, and obtain the telescopic distance based on the position of the roller heat adjustment device 1 and the target spacing;

[0081] The telescopic cylinder is controlled to extend according to the telescopic distance.

[0082] Specifically, according to the diameter of the working roll 4, the target spacing between the electromagnetic induction heating module 11 and the roll body is determined, and then the position of the roll heat adjustment device 1 is determined, and the difference between the spacing between the roll heat adjustment device 1 and the roll body and the target spacing is obtained to obtain the telescopic distance, and the telescopic cylinder is controlled to extend the telescopic distance to ensure that a certain gap is left between the roll body of the working roll 4 and the electromagnetic induction heating module 11.

[0083] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A strip shape control system, characterized in that: It comprises a roller heat adjustment device (1), a plate shape detection roller (2) and a plate shape controller (3), wherein the roller heat adjustment device (1) and the plate shape detection roller (2) are respectively connected to the plate shape controller (3) in communication; The roller heat adjustment device (1) comprises an electromagnetic induction heating module (11) and a temperature detector (12), wherein the plurality of electromagnetic induction heating modules (11) are respectively used to heat the working roller (4), and the heating range of the plurality of electromagnetic induction heating modules (11) covers the roller body of the working roller (4), and the plurality of temperature detectors (12) are respectively used to detect the temperature at different positions of the roller body, so as to obtain the temperature field distribution data of the roller body and transmit it to the plate shape controller (3); The flatness detection roller (2) is used to contact the strip (5) after being rolled by the working roller (4) to obtain the current flatness data of the strip (5) and transmit it to the flatness controller (3); The plate shape controller (3) is used to adjust the working state of the electromagnetic induction heating module (11) at a corresponding position according to the temperature field distribution data and the plate shape data.

2. The strip shape control system according to claim 1, characterized in that: The switch, heating power and operating frequency of each electromagnetic induction heating module (11) are individually adjustable.

3. The strip shape control system according to claim 1, characterized in that: The roller heat adjustment device (1) further comprises a mounting plate (13), wherein the mounting plate (13) comprises a mounting surface facing the working roller (4), and a plurality of the electromagnetic induction heating modules (11) are arranged at intervals on the mounting surface; and a plurality of the temperature detectors (12) are arranged at intervals on the end surface of the mounting plate (13) away from the strip (5).

4. The strip shape control system according to claim 3, characterized in that: The mounting surface comprises a first mounting surface and a second mounting surface, and the angle between the first mounting surface and the second mounting surface is an obtuse angle; a plurality of the electromagnetic induction heating modules (11) are arranged at intervals on the first mounting surface and the second mounting surface, respectively, and the plurality of the electromagnetic induction heating modules (11) located on the first mounting surface and the plurality of the electromagnetic induction heating modules (11) located on the second mounting surface are arranged in an alternating manner.

5. The strip shape control system according to claim 4, characterized in that: The mounting plate (13) comprises a first plate body (131) and a second plate body (132); the first plate body (131) and the second plate body (132) are hinged to each other; the first mounting surface is located on the first plate body (131) and the second mounting surface is located on the second plate body (132); a first connecting portion is provided on the first plate body (131) and a second connecting portion is provided on the second plate body (132); the first connecting portion is used to connect with the second connecting portion so as to fix the first plate body (131) relative to the second plate body (132).

6. The strip shape control system according to claim 3, characterized in that: It also comprises an adjustment mechanism, which is connected to the mounting plate (13) and is used to adjust the position of the mounting plate relative to the working roller (4).

7. The strip shape control system according to claim 3, characterized in that: The adjustment mechanism comprises a fixed frame (6) and a telescopic cylinder, wherein the fixed end of the telescopic cylinder is connected to the fixed frame (6), and the telescopic end of the telescopic cylinder is connected to the mounting plate (13).

8. A strip shape control method, characterized in that: Based on the strip shape control system according to any one of claims 1 to 7, the method comprises: The temperature detector (12) obtains the temperature field distribution information of the working roll (4) and sends it to the plate shape controller (3); The flatness detection roller (2) obtains the flatness data of the strip (5) after being rolled by the working roller (4) and sends it to the flatness controller (3); The plate shape controller (3) generates a corresponding adjustment strategy based on the temperature field distribution information and the plate shape data, and controls a plurality of electromagnetic induction heating modules (11) to heat the working roll (4) according to the adjustment strategy until the plate shape data conforms to the standard plate shape data, wherein the adjustment strategy includes obtaining a target heating temperature based on the plate shape data at the corresponding position and the temperature field distribution information at the corresponding position if the temperature field distribution information does not conform to the standard temperature field distribution and the plate shape data at the corresponding position does not conform to the standard plate shape data, and controlling the electromagnetic induction heating module (11) at the corresponding position to heat to the target heating temperature.

9. The strip shape control method according to claim 8, characterized in that: The strip shape control system further comprises a rolling mill roll bending device, a transverse adjustment device and a segmented cooling device, wherein the rolling mill roll bending device is in contact with the working roll (4), the transverse adjustment device is in contact with the strip (5) before being rolled by the working roll (4), and the segmented cooling device is arranged corresponding to the roll body of the working roll (4); The strip shape control method further comprises: If the plate shape data does not conform to the standard plate shape data, a target bending amount is obtained according to the plate shape data at a corresponding position and the temperature field distribution information at a corresponding position, and the rolling mill roll bending device at the corresponding position is controlled to adjust the working roll (4) according to the target bending amount; If the plate shape data does not conform to the standard plate shape data, a target lateral displacement is obtained according to the plate shape data at the corresponding position and the temperature field distribution information at the corresponding position, and the lateral displacement adjustment device at the corresponding position is controlled to adjust the strip according to the target lateral displacement (5); If the current temperature at any position on the working roll (4) is greater than the standard temperature at the corresponding position, and the plate shape data at the corresponding position does not conform to the standard plate shape data, a target cooling temperature is obtained based on the plate shape data at the corresponding position and the current temperature at the corresponding position, and the corresponding position on the working roll (4) is controlled to cool to the target cooling temperature through a segmented cooling device at the corresponding position, wherein the temperature field distribution information includes the current temperatures at multiple positions on the working roll, and the standard temperature field distribution includes the standard temperatures at multiple positions on the working roll.

10. The strip shape control method according to claim 8, characterized in that: Before the temperature detector (12) acquires the temperature field distribution information of the working roll (4) and sends it to the plate shape controller (3), the method further includes: Acquiring the previous operating parameters of the working roll (4) and the target shape of the strip (5) before the operation; The current operation strategy is obtained according to the operation parameters, the target plate shape and a preset strategy generation model, wherein the strategy generation model is obtained by training a preset model according to historical operation data of the working roll (4) and historical plate shape data of the strip (5); The operation of the electromagnetic induction heating module (11) is controlled according to the current operation strategy.

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