A method and device for controlling a twenty-roller rolling mill for rolling silicon steel, and an electronic device

Abstract

This application provides a control method, apparatus, and electronic equipment for rolling silicon steel using a 20-roll mill. The method includes: controlling a coiler to coil the silicon steel; guiding the silicon steel into the 20-roll mill for multiple passes of reciprocating rolling, and adjusting the relative reduction at the edges of the silicon steel so that the relative reduction at the edges is less than the relative reduction at 1 / 4 of the width direction of the silicon steel, but greater than the relative reduction at the center of the silicon steel; wherein, during the first pass of rolling the silicon steel in the 20-roll mill, the unit back tension of the silicon steel is controlled to a preset tension. This application solves the problem of silicon steel deviation or strip breakage when rolling narrow silicon steel using a 20-roll mill. Through optimization of the rolling process and process parameters, as well as the design of the roll profile, this application solves the problems of silicon steel deviation and strip breakage, ensuring stable production and production efficiency, and greatly improving the shape and quality of the silicon steel.

Description

Technical Field

[0001] This application relates to the field of steel rolling technology, and in particular to a control method, apparatus and electronic equipment for rolling silicon steel using a 20-roll mill. Background Technology

[0002] When a 20-roll mill rolls narrow-width silicon steel with a high silicon content, especially silicon steel with a width of less than 1050mm, the overall crown of the mill's roll system is insufficient. Furthermore, under high rolling force and large reduction, if the reduction in the width direction of the silicon steel is not properly controlled, strip breakage is highly likely. Strip breakage causes significant waste of raw materials, equipment damage, and prolonged downtime.

[0003] Therefore, how to adopt an effective method to avoid accidents such as silicon steel deviation and strip breakage when rolling narrow silicon steel with a 20-roll mill, and improve the stability of production line production and the quality of silicon steel, is an urgent technical problem to be solved. Summary of the Invention

[0004] The purpose of this application is to provide a control method, device, and electronic equipment for rolling silicon steel using a 20-roll mill. This application solves the problem of silicon steel deviation or strip breakage when rolling narrow silicon steel using a 20-roll mill. By optimizing the rolling process and process parameters, as well as designing the roll shape, this application solves the problems of huge raw material waste, equipment damage, and long downtime caused by silicon steel deviation and strip breakage, ensuring stable production and production efficiency of the production line, and greatly improving the shape and quality of silicon steel.

[0005] Specifically, this application adopts the following technical solution:

[0006] According to one aspect of the embodiments of this application, a control method for rolling silicon steel using a 20-roll mill is provided. The method includes: controlling a coiler to coil the silicon steel; guiding the silicon steel into the 20-roll mill for multiple passes of reciprocating rolling via the coiler, and adjusting the relative reduction at the edges of the silicon steel such that the relative reduction at the edges is less than the relative reduction at 1 / 4 of the width direction of the silicon steel, and greater than the relative reduction at the center of the silicon steel; wherein, during the first pass of rolling the silicon steel using the 20-roll mill, the unit back tension of the silicon steel is controlled to be a preset tension.

[0007] In some embodiments of this application, based on the aforementioned scheme, the control of the coiler to coil silicon steel includes: using laser measurement to make the center line of the silicon steel coil coincide with the rolling center line, so as to complete the coiling of the silicon steel.

[0008] In some embodiments of this application, based on the foregoing scheme, the method further includes: controlling the overlap deviation between the center line of the silicon steel coil and the rolling center line to be less than 3mm.

[0009] In some embodiments of this application, based on the foregoing scheme, the preset tension is 4.3 kg / mm. 2 ~9.1kg / mm 2 .

[0010] In some embodiments of this application, based on the foregoing scheme, the unit back tension of the silicon steel is negatively correlated with the width of the silicon steel.

[0011] In some embodiments of this application, based on the foregoing scheme, the convexity of the work roll body of the twenty-roll mill is greater than 0.

[0012] In some embodiments of this application, based on the foregoing scheme, the crown of the work roll body of the 20-roll mill is 100μm to 200μm.

[0013] In some embodiments of this application, based on the foregoing scheme, the convexity of the work roll body is negatively correlated with the width of the silicon steel.

[0014] According to one aspect of the embodiments of this application, a control device for rolling silicon steel using a 20-roll mill is provided. The device includes: a first control unit, used to control a coiler to coil the silicon steel; and a second control unit, used to guide the silicon steel into the 20-roll mill for multiple passes of reciprocating rolling via the coiler, and to adjust the relative reduction at the edge of the silicon steel such that the relative reduction at the edge is less than the relative reduction at 1 / 4 of the width direction of the silicon steel, and greater than the relative reduction at the center of the silicon steel; wherein, during the first pass of rolling the silicon steel by the 20-roll mill, the unit back tension of the silicon steel is controlled to be a preset tension.

[0015] According to one aspect of the present application, an electronic device is provided, including a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the operations performed by the control method for rolling silicon steel in a 20-roll mill described above.

[0016] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0017] The proposed solution can solve the problem of silicon steel deviation or strip breakage when rolling narrow silicon steel with a 20-roll mill. By optimizing the rolling process and process parameters, as well as designing the roll shape, this application solves the problems of huge raw material waste, equipment damage, and long downtime caused by silicon steel deviation and strip breakage, ensuring stable production and production efficiency of the production line, and greatly improving the shape and quality of silicon steel. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A flowchart of a control method for rolling silicon steel using a 20-roll mill according to one embodiment of this application is shown;

[0020] Figure 2 This invention provides a schematic diagram showing the relative reduction of silicon steel at various locations along its width in one embodiment of the present application.

[0021] Figure 3 A schematic diagram showing the coincidence of the center line of the silicon steel coil and the rolling center line in one embodiment of this application is shown;

[0022] Figure 4 A schematic diagram of the work roll profile of a 20-roll mill according to one embodiment of this application is shown;

[0023] Figure 5 A structural block diagram of a control device for rolling silicon steel using a 20-roll mill according to one embodiment of this application is shown;

[0024] Figure 6 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation

[0025] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0026] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0027] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.

[0029] The implementation details of the technical solutions in the embodiments of this application are described in detail below:

[0030] Reference Figure 1 , Figure 1 This is a flowchart of a control method for rolling silicon steel using a 20-roll mill, as described in one embodiment of this application.

[0031] According to a typical embodiment of this application, a control method for rolling silicon steel using a 20-roll mill is provided, the method comprising the following steps S1 to S2:

[0032] Step S1: Control the coiler to wind up the silicon steel.

[0033] Step S2: The silicon steel is fed into a 20-roll mill via the coiler for multiple passes of reciprocating rolling. The relative reduction at the edge of the silicon steel is adjusted so that the relative reduction at the edge is less than the relative reduction at 1 / 4 of the width of the silicon steel, but greater than the relative reduction at the center of the silicon steel. During the first pass of rolling the silicon steel on the 20-roll mill, the unit back tension of the silicon steel is controlled to a preset tension.

[0034] In this application, when a 20-roll mill rolls narrow silicon steel, due to insufficient overall crown of the mill's roll system, and the silicon steel being subjected to large rolling forces and large reductions, especially in the first pass of rolling, when the reduction in the width direction of the silicon steel is poorly controlled, silicon steel deviation and strip breakage accidents are very likely to occur.

[0035] To prevent silicon steel from deviating and breaking, the running length of the silicon steel at the 20-roll mill inlet can be shortened. A coiler is used to directly coil the silicon steel into the mill, which then guides the steel through multiple passes for reciprocating rolling. This significantly reduces the running length at the inlet, lowering the likelihood of deviating and ensuring stable entry into the mill. Using a coiler to directly coil the silicon steel and then guide it through multiple passes provides greater unit back tension, ensuring sufficient friction to resist lateral disturbances and allowing for stable rolling.

[0036] To ensure the shape and quality of the silicon steel rolled by the 20-roll mill, the relative reduction at the edges can be adjusted. This relative reduction plays a crucial role in the shape of the silicon steel; excessive reduction at the edges can lead to severe edge waviness and increase the likelihood of strip breakage. To guarantee the shape and quality of the rolled silicon steel, the relative reduction at the edges can be controlled to be less than the relative reduction at 1 / 4 of the width direction of the silicon steel, but greater than the relative reduction at the center. (Refer to...) Figure 2 , Figure 2 A schematic diagram of the relative reduction of silicon steel in the width direction of one embodiment of this application is shown.

[0037] In one embodiment of this application, the control of the coiler to wind up silicon steel includes: using laser measurement to make the center line of the silicon steel coil coincide with the rolling center line, so as to complete the winding of the silicon steel.

[0038] In this application, to ensure that the coiler can smoothly guide the silicon steel into the 20-roll mill for rolling, and to effectively guarantee the symmetry of the silicon steel's initial shape, avoiding accidents such as excessive waviness on one side, excessive tightness on one side, or silicon steel deviation, laser measurement can be used during the coiling process to ensure that the center line of the silicon steel coil coincides with the rolling center line, thus completing the coiling of the silicon steel. For details, please refer to... Figure 3 , Figure 3 This diagram illustrates a schematic representation of a silicon steel coil centerline coinciding with the rolling centerline in one embodiment of this application. When the silicon steel coil centerline coincides with the rolling centerline, it ensures that the silicon steel will not deviate from the rolling centerline after the coiler uncoils it. This also facilitates smooth steel biting by the 20-roll mill and prevents the head shape of the silicon steel from being affected by biting failure.

[0039] In one embodiment of this application, the method further includes controlling the overlap deviation between the center line of the silicon steel coil and the rolling center line to be less than 3 mm.

[0040] In this application, during the process of aligning the centerline of the silicon steel coil with the rolling centerline using laser measurement, an overlap deviation may occur. This means the centerline of the coil deviates from the rolling centerline. This can be understood as follows: when the centerline of the silicon steel coil is completely aligned with the rolling centerline, the overlap deviation is zero. However, if the centerline of the silicon steel coil is not completely aligned with the rolling centerline, an overlap deviation will exist. The centerline of the coil may be 2mm or 1mm away from the rolling centerline. If an overlap deviation exists between the centerline of the silicon steel coil and the rolling centerline, it is necessary to control the overlap deviation to be less than 3mm. This ensures that the silicon steel smoothly enters the twelve-roll mill for rolling after uncoiling, preventing accidents such as deviation during operation at the rolling inlet. This significantly improves the production line efficiency.

[0041] In one embodiment of this application, the preset tension can be 4.3 kg / mm. 2 ~9.1kg / mm 2 .

[0042] In one embodiment of this application, the unit back tension of the silicon steel is negatively correlated with the width of the silicon steel.

[0043] In this application, since the silicon steel needs to undergo multiple passes of reciprocating rolling from raw material to finished product using the 20-roll mill, the specific number of rolling passes can be selected according to the finished product requirements of the silicon steel. This application does not impose any particular limitation on the number of rolling passes of the 20-roll mill. During the first pass of rolling, because the silicon steel raw material has a certain thickness, the large rolling force and reduction applied to the silicon steel by the rolls during the first pass make it extremely prone to deviation or strip breakage. To avoid deviation or strip breakage during the first pass of rolling, the unit back tension of the silicon steel can be controlled to a preset tension, which can be 4.3 kg / mm. 2 ~9.1kg / mm 2 It should be noted that the preset tension can also be other values, such as 4.2 kg / mm. 2 Or 9.2kg / mm 2 Wait, this application does not impose any special restrictions on the preset tension, which can be adjusted according to the actual production needs.

[0044] The unit back tension of the silicon steel can be applied to the silicon steel through the 20-roll mill and the coiler to ensure that the silicon steel has increased tension during high-speed rolling. Increased tension leads to increased static friction, which is beneficial for stable operation and improved resistance to lateral disturbances, thus suppressing deviation. It is important to note that the unit back tension of the silicon steel is negatively correlated with its width; that is, the wider the silicon steel, the lower the unit back tension, and vice versa.

[0045] In one embodiment of this application, the convexity of the work roll body of the twenty-roll mill is greater than 0.

[0046] In one embodiment of this application, the crown of the work roll body of the 20-roll mill is 100μm to 200μm.

[0047] In one embodiment of this application, the convexity of the work roll body is negatively correlated with the width of the silicon steel.

[0048] In this application, the crown of the work roll body of the twenty-roll mill is greater than 0, which can be referred to as follows: Figure 4 As shown, Figure 4 A schematic diagram of the work roll profile of a 20-roll mill according to one embodiment of this application is shown. The crown of the work roll body can be 100μm to 200μm, and other crown values ​​are also possible. This application does not impose any particular limitation, and adjustments can be made according to actual production needs. The crown of the work roll body is negatively correlated with the width of the silicon steel; that is, the narrower the width of the silicon steel, the greater the crown of the work roll body, and the wider the width of the silicon steel, the smaller the crown of the work roll body. Adjustments to the crown of the work roll body can be made according to this rule. The roll profile of the work roll can be as follows: Figure 4 The working roll shown has the same roll type, but it can also be other roll types. The specific convex shape of the working roll can be designed according to the required cross-sectional shape of the silicon steel. This application does not impose any special restrictions on this.

[0049] Using work rolls with a crown value to roll the silicon steel can reduce the amount of reduction at the edge of the roll gap, effectively ensuring the straightness of the silicon steel at the roll gap, avoiding the problem of severe waviness caused by excessive reduction at the edge of the silicon steel, and reducing the probability of silicon steel running off track and breaking.

[0050] The specific implementation of this application will be further illustrated by specific embodiments below, but the specific implementation of this application is not limited to the following embodiments.

[0051] In one specific embodiment of this application, when rolling silicon steel with a width less than 1050mm, a thickness of 0.2mm, and a high silicon content using a 20-roll mill, a coiler is used to directly coil the silicon steel. Specifically, when laser measurement is used to ensure that the center line of the silicon steel coil coincides with the rolling center line, the overlap deviation between the center line of the silicon steel coil and the rolling center line is controlled to be less than 3mm. This effectively ensures the symmetry of the silicon steel's initial shape and avoids accidents such as excessive waviness on one side, excessive tightness on one side, and silicon steel deviation.

[0052] The silicon steel is fed into a 20-roll mill via the coiler for six passes of reciprocating rolling. During the first pass of rolling the silicon steel on the 20-roll mill, the unit back tension of the silicon steel is controlled to be 4.3 kg / mm. 2 ~9.1kg / mm 2 This ensures that the static friction of the silicon steel is increased during high-speed rolling, which is beneficial to the stable operation of the silicon steel and improves its resistance to lateral disturbances, thereby suppressing the deviation of the silicon steel.

[0053] The convexity of the working roll body of the twenty-roll mill is 100μm to 200μm. When the rolls are squeezed by the rolling force, the upper roll bends in the forward direction and the lower roll bends in the reverse direction. By changing the roll shape, the amount of silicon steel pressed down at the edge of the roll gap is reduced, which effectively ensures the straightness of the silicon steel at the roll gap and avoids the serious waviness caused by excessive edge pressing down, which increases the probability of the rolled piece running off track and breaking.

[0054] When the silicon steel is fed into a 20-roll mill for six passes of reciprocating rolling via the coiler, the relative reduction at the edges of the silicon steel is adjusted so that the relative reduction at the edges is less than the relative reduction at 1 / 4 of the width direction of the silicon steel, but greater than the relative reduction at the center of the silicon steel. This results in the following final shape of the silicon steel: edge shape is 0 IU to 10 IU, shape at 1 / 4 of the width direction from the edge is 5 IU to 15 IU, and shape at the center is (0 to 10) IU. Flatness is commonly described using I units; the larger the I unit, the worse the shape. One IU is one I unit. It is important to note that when adjusting the relative reduction in the width direction of the silicon steel, the control of the relative reduction at the edges is primary, while the control of the relative reduction at approximately 1 / 4 of the width direction and the center is secondary, and the trend of the relative reduction in the width direction of the silicon steel should be considered.

[0055] Finally, at the end of rolling, the overall shape of the silicon steel plate is in a slightly wavy pattern, which greatly reduces the risk of the rolled piece being damaged by excessive edge wavy shape and asymmetry during the rolling process, thus preventing the silicon steel from deviating and breaking. The finished silicon steel product is of qualified quality.

[0056] The following describes an embodiment of the apparatus described in this application, which can be used to execute the control method for rolling silicon steel using a 20-roll mill as described in the above embodiments of this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the control method for rolling silicon steel using a 20-roll mill described above in this application.

[0057] Figure 5 This is a structural block diagram of a control device for rolling silicon steel using a 20-roll mill, as shown in an embodiment of this application.

[0058] Reference Figure 5 As shown, a control device 500 for rolling silicon steel using a 20-roll mill according to an embodiment of this application includes: a first control unit 501 and a second control unit 502.

[0059] The first control unit 501 is used to control the coiler to coil the silicon steel.

[0060] The second control unit 502 is used to guide the silicon steel into the 20-roll mill for multiple passes of reciprocating rolling via the coiler, and to adjust the relative reduction at the edge of the silicon steel so that the relative reduction at the edge is less than the relative reduction at 1 / 4 of the width direction of the silicon steel, and greater than the relative reduction at the center of the silicon steel; wherein, when the silicon steel is rolled in the first pass by the 20-roll mill, the unit back tension of the silicon steel is controlled to be a preset tension.

[0061] Reference Figure 6 , Figure 6 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown.

[0062] like Figure 6 As shown, the computer system 600 includes a Central Processing Unit (CPU) 601, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 602 or programs loaded from Storage Unit 608 into Random Access Memory (RAM) 603, such as performing the methods described in the above embodiments. The RAM 603 also stores various programs and data required for system operation. The CPU 601, ROM 602, and RAM 603 are interconnected via a bus 604. An Input / Output (I / O) interface 605 is also connected to the bus 604.

[0063] The following components are connected to I / O interface 605: an input section 606 including a keyboard, mouse, etc.; an output section 607 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to I / O interface 605 as needed. A removable medium 611, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 610 as needed so that computer programs read from it can be installed into storage section 608 as needed.

[0064] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 609, and / or installed from removable medium 611. When the computer program is executed by central processing unit (CPU) 601, it performs various functions defined in the system of this application.

[0065] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such transmitted data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0066] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0067] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0068] According to a typical embodiment of this application, this application also proposes a computer-readable storage medium storing at least one piece of program code, which is loaded and executed by a processor to implement the operations performed by the control method for rolling silicon steel in a 20-roll mill as described above.

[0069] According to a typical embodiment of this application, this application also proposes an electronic device, which includes a memory and a processor, wherein the memory stores a computer program, characterized in that the processor executes the computer program to perform the operations performed by the control method for rolling silicon steel in a 20-roll mill as described above.

[0070] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0071] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0072] Firstly, the proposed solution can solve the problem of silicon steel deviation or strip breakage when rolling narrow silicon steel in a 20-roll mill. This application solves the problems of huge raw material waste, equipment damage, and long downtime caused by silicon steel deviation and strip breakage through optimization of rolling process and process parameters, as well as design of roll shape, ensuring stable production and production efficiency of the production line, and greatly improving the shape and quality of silicon steel.

[0073] Secondly, by adopting the scheme proposed in this application, silicon steel is directly coiled on the coiler. Compared with coiling on the uncoiler, the running length of silicon steel at the rolling inlet is shortened during rolling, and the coiler can provide a larger unit back tension, making the silicon steel run more stably in the rolling inlet direction during the rolling process.

[0074] Third, by adopting the scheme proposed in this application, a work roll with a convexity is used, which effectively increases the overall convexity of the rolling mill. This allows for better control of the edge thinning of silicon steel, making it easier to control the relative reduction in the width direction of silicon steel during rolling. The relative reduction at the edge is slightly less than the relative reduction at about 1 / 4 of the width direction of silicon steel, but slightly greater than the relative reduction in the middle of silicon steel. This is more conducive to the stable rolling of silicon steel and makes it less prone to deviation.

[0075] Fourth, adopting the solution proposed in this application can greatly reduce the amount of silicon steel scrap and equipment damage, significantly save resources and equipment maintenance funds, and reduce costs.

[0076] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since this application can be embodied in many forms without departing from the spirit or substance of the application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A method for controlling the rolling width of silicon steel less than 1050 mm using a 20-roll mill, characterized in that, The method includes: Control the coiler to wind up the silicon steel; The silicon steel is fed into a 20-roll mill via a coiler for multiple passes of reciprocating rolling. The relative reduction at the edges of the silicon steel is adjusted so that it is less than the relative reduction at 1 / 4 of the width of the silicon steel, but greater than the relative reduction at the center. During the first pass of rolling the silicon steel in the 20-roll mill, the unit back tension of the silicon steel is controlled to a preset tension. The work rolls of the 20-roll mill have a crown value.

2. The method according to claim 1, characterized in that, The control coiler winds up silicon steel, including: Laser measurement is used to make the center line of the silicon steel coil coincide with the rolling center line in order to complete the winding of the silicon steel.

3. The method according to claim 2, characterized in that, The method further includes: The overlap deviation between the center line of the silicon steel coil and the rolling center line is controlled to be less than 3mm.

4. The method according to claim 1, characterized in that, The preset tension is 4.3 kg / mm 2 9.1 kg / mm 2 .

5. The method according to claim 1, characterized in that, The unit back tension of the silicon steel is negatively correlated with the width of the silicon steel.

6. The method according to claim 1, characterized in that, The convexity of the work roll body of the twenty-roll mill is greater than 0.

7. The method according to claim 6, characterized in that, The crown of the work roll body of the twenty-roll mill is 100μm~200μm.

8. The method according to claim 6, characterized in that, The convexity of the work roll body is negatively correlated with the width of the silicon steel.

9. A control device for rolling silicon steel with a width of less than 1050 mm using a 20-roll mill, characterized in that, The device includes: The first control unit is used to control the coiler to wind up the silicon steel. The second control unit is used to guide the silicon steel into the 20-roll mill for multiple passes of reciprocating rolling via the coiler, and to adjust the relative reduction at the edge of the silicon steel so that the relative reduction at the edge is less than the relative reduction at 1 / 4 of the width direction of the silicon steel, and greater than the relative reduction at the center of the silicon steel; wherein, when the silicon steel is rolled in the first pass by the 20-roll mill, the unit back tension of the silicon steel is controlled to be a preset tension, and the work rolls of the 20-roll mill have a crown value.

10. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it performs the operations described in any one of claims 1 to 8.

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