A control method and device of a coil box applied to silicon steel production

Abstract

The application provides a control method and device of a plate coiling box applied to silicon steel production, and the method comprises the following steps: coiling a silicon steel intermediate blank, and adjusting the lead rate of a first coiling roller; controlling the first coiling roller and a second coiling roller to descend to a first preset height; when the head of the silicon steel intermediate blank exceeds the plate coiling box by a preset distance, and the uncoiling arm is lifted by 20° relative to the uncoiling position, controlling the first coiling roller to ascend to a second preset height, and controlling the second coiling roller to ascend to a third preset height; when the first rack of a finishing rolling unit bites the silicon steel intermediate blank, controlling the first coiling roller and the second coiling roller to descend to the first preset height. The scheme provided in the application adjusts the lead rate of the first coiling roller, adjusts the height of the first coiling roller and the second coiling roller and the opening degree of a stabilizer, and ensures that the silicon steel intermediate blank can be smoothly coiled and uncoiled.

Description

Technical Field

[0001] This application relates to the field of steel rolling technology, and in particular to a control method and device for using a plate and coil box in silicon steel production. Background Technology

[0002] The coil box is installed in the finishing mill entrance area to corelessly coil the intermediate billets from the roughing mill before uncoiling them and sending them into the finishing mill. When using the coil box on silicon steel, several problems arise due to the characteristics of silicon steel: the iron oxide scale on silicon steel is highly adhesive and does not detach during coiling, causing severe slippage and resulting in coiling failure or tracking abnormalities; low friction during uncoiling leads to premature conveying of larger coils, resulting in high inertia and centerline fluctuations; and the tail end is prone to jamming at the stabilizer, causing coiling failure.

[0003] Therefore, how to apply an effective plate and coil box to the control method of silicon steel production, to ensure that silicon steel intermediate billets can be smoothly coiled and uncoiled, to guarantee the quality of silicon steel intermediate billets, and to improve the production efficiency of the production line, is an urgent technical problem to be solved. Summary of the Invention

[0004] The purpose of this application is to provide a control method and device for using a plate and coil box in silicon steel production. This application solves the problems of slippage during winding, premature transmission during unwinding, and jamming at the tail of the silicon steel intermediate billet during the winding and unwinding process of the silicon steel intermediate billet through the plate and coil box. The solution proposed in this application adjusts the lead rate of the first support roller, the height of the first and second support rollers, and the opening degree of the stabilizer during the winding and unwinding process of the silicon steel intermediate billet through the plate and coil box, so as to ensure that the silicon steel intermediate billet can be smoothly wound and unwound.

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

[0006] According to one aspect of the embodiments of this application, a control method for applying a plate and coil box to silicon steel production is provided, characterized in that the method includes: coiling a silicon steel intermediate billet through the plate and coil box; adjusting the lead rate of a first support roller according to the coil diameter of the silicon steel intermediate billet, wherein the lead rate is the ratio of the speed difference between the first support roller and the bending roller to the speed of the bending roller; after the silicon steel intermediate billet is coiled, controlling the first support roller and the second support roller to descend to a first preset height so that the uncoiling arm reaches the uncoiling position for uncoiling; when the head of the silicon steel intermediate billet exceeds a preset distance of the plate and coil box, and the uncoiling arm is raised 20° relative to the uncoiling position, controlling the first support roller to rise to a second preset height, and controlling the second support roller to rise to a third preset height, wherein the second preset height is higher than the third preset height, and the third preset height is higher than the first preset height; when the first stand of the finishing mill bites the silicon steel intermediate billet, controlling the first support roller and the second support roller to descend to the first preset height to complete the coiling and uncoiling of the silicon steel intermediate billet.

[0007] In some embodiments of this application, the first preset height is -140mm.

[0008] In some embodiments of this application, the second preset height is -50mm.

[0009] In some embodiments of this application, the third preset height is -100mm.

[0010] In some embodiments of this application, adjusting the lead rate of the first support roller according to the coil diameter of the silicon steel intermediate billet includes:

[0011] If the diameter of the silicon steel intermediate billet is less than the preset diameter, the lead rate of the first support roller is adjusted to the first lead rate; if the diameter of the silicon steel intermediate billet is greater than or equal to the preset diameter, the lead rate of the first support roller is adjusted to the second lead rate.

[0012] In some embodiments of this application, the preset roll diameter is 1000 mm.

[0013] In some embodiments of this application, the first lead rate is 0.5%.

[0014] In some embodiments of this application, the formula for calculating the second lead rate is:

[0015] s = (L - 1000mm) * 5% + 0.5%

[0016] Where s is the second lead rate of the first support roller, and L is the roll diameter of the silicon steel intermediate billet.

[0017] In some embodiments of this application, the method further includes: when the tail of the silicon steel intermediate billet reaches a preset position, controlling the opening degree of the stabilizer to open a preset opening degree so that the winding of the silicon steel intermediate billet is completed.

[0018] According to one aspect of the embodiments of this application, a control device for using a plate coil box in silicon steel production is provided. The device includes: an adjustment unit, configured to coil a silicon steel intermediate billet through the plate coil box, and to adjust the lead rate of a first support roller according to the coil diameter of the silicon steel intermediate billet, wherein the lead rate is the ratio of the speed difference between the first support roller and the bending roller to the speed of the bending roller.

[0019] The first control unit is used to control the first and second support rollers to descend to a first preset height after the silicon steel intermediate billet is coiled, so that the uncoiling arm reaches the uncoiling position for uncoiling.

[0020] The second control unit is used to control the first support roller to be raised to a second preset height and the second support roller to be raised to a third preset height when the head of the silicon steel intermediate billet exceeds the preset distance of the plate and coil box and the uncoiling arm is raised by 20° relative to the uncoiling position. The second preset height is higher than the third preset height and the third preset height is higher than the first preset height.

[0021] The third control unit is used to control the first and second support rolls to descend to the first preset height when the first stand of the finishing mill bites the silicon steel intermediate billet, so as to complete the winding and unwinding of the silicon steel intermediate billet.

[0022] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0023] The proposed solution can solve the problems of slippage during winding, premature transmission during unwinding, and jamming at the tail of the silicon steel intermediate billet during the winding and unwinding process of the silicon steel intermediate billet through the plate and coil box. The proposed solution adjusts the lead rate of the first support roller, the height of the first and second support rollers, and the opening degree of the stabilizer during the winding and unwinding process of the silicon steel intermediate billet through the plate and coil box to ensure that the silicon steel intermediate billet can be wound and unwound smoothly. Attached Figure Description

[0024] 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.

[0025] Figure 1 A flowchart illustrating a control method for applying a plate roll box to silicon steel production according to one embodiment of this application is shown.

[0026] Figure 2 This invention illustrates an equipment layout diagram of a sheet roll box used in silicon steel production according to one embodiment of the present application;

[0027] Figure 3 This invention illustrates a structural block diagram of a control device for a plate roll box applied to silicon steel production according to one embodiment of the present application;

[0028] The accompanying diagrams and their labels are explained below:

[0029] 201—Bending roller, 202—Shaping roller,

[0030] 203—First support roller, 204—Second support roller

[0031] 205—Unwinding arm, 206—Unwinding arm shovel head,

[0032] 207—Sheet roll box. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] During the silicon steel production process, due to the strong adhesion of the iron oxide scale on the silicon steel, it is difficult to remove the scale when coiling the intermediate silicon steel billet. This can lead to severe slippage of the intermediate silicon steel billet during coiling, causing coiling failure or tracking abnormalities in the production line system. When uncoiling the intermediate silicon steel billet...

[0038] To address the aforementioned issues, this application proposes a control method and apparatus for using a plate and coil box in silicon steel production. By employing a plate and coil box during the winding process of the silicon steel intermediate billet, the method dynamically adjusts the lead rate of the first support roller based on the change in the diameter of the intermediate billet, thus mitigating slippage during the winding process. Furthermore, by dynamically adjusting the heights of the first and second support rollers during the unwinding process of the silicon steel intermediate billet, the problem of premature coil transmission of the silicon steel intermediate billet is solved without affecting its normal transport. Finally, by adjusting the opening degree of the control stabilizer according to the width of the tail of the silicon steel intermediate billet, the problem of winding failure caused by tail jamming is resolved.

[0039] The implementation details of the technical solutions in the embodiments of this application are described in detail below:

[0040] Reference Figure 1 , Figure 1 This is a flowchart of a control method for applying a plate and coil box to silicon steel production in one embodiment of this application.

[0041] According to a typical embodiment of this application, a control method for applying a plate and coil box in silicon steel production is provided, the method comprising the following steps S1 to S4:

[0042] Step S1: The silicon steel intermediate billet is wound up through the plate coil box. The lead rate of the first support roller is adjusted according to the roll diameter of the silicon steel intermediate billet. The lead rate is the ratio of the speed difference between the first support roller and the bending roller to the speed of the bending roller.

[0043] In this application, silicon steel intermediate billets can be wound using a coil box. During winding, the silicon steel intermediate billet may have adhered iron oxide scale, causing severe slippage. To prevent slippage during winding, the lead rate of the first support roller can be adjusted according to the roll diameter of the silicon steel intermediate billet. The lead rate is the ratio of the speed difference between the first support roller and the bending roller to the speed of the bending roller.

[0044] In step S2, after the silicon steel intermediate billet is wound up, the first and second support rollers are controlled to descend to a first preset height so that the unwinding arm reaches the unwinding position for unwinding.

[0045] In this application, after the silicon steel intermediate billet is coiled, it is necessary to control the first and second support rollers to descend to a first preset height. Since the uncoiling arm needs to be lowered to the uncoiling position when the steel coil formed from the silicon steel intermediate billet is uncoiled, the steel coil formed from the silicon steel intermediate billet needs to be lowered to a certain position to avoid bumping or scratching the silicon steel intermediate billet when the uncoiling arm descends to the uncoiling position. Lowering the first and second support rollers to the first preset height ensures that the uncoiling arm shovel can be smoothly inserted, allowing the head of the silicon steel intermediate billet to be uncoiled normally.

[0046] Step S3: When the head of the silicon steel intermediate billet exceeds the preset distance of the plate and coil box, and the uncoiling arm is raised by 20° relative to the uncoiling position, control the first support roller to be raised to the second preset height, and control the second support roller to be raised to the third preset height, wherein the second preset height is higher than the third preset height, and the third preset height is higher than the first preset height.

[0047] In this application, after the silicon steel intermediate billet is coiled, the coil formed from the silicon steel intermediate billet needs to be uncoiled so that the silicon steel intermediate billet can be sent to the finishing mill for finishing rolling. Because the silicon steel intermediate billet coil may have adhering iron oxide scale, the friction may be low when uncoiling the coil, causing the coil to be too large and prematurely conveyed. Due to the large inertia of the large coil, the centerline of the silicon steel intermediate billet fluctuates significantly during conveying (i.e., the silicon steel intermediate billet oscillates in the width direction when conveyed to the finishing mill).

[0048] To address these issues, when the head of the silicon steel intermediate billet exceeds a preset distance from the coil box (the preset distance can be 1m, or other values, and can be adjusted according to actual conditions; this application does not impose any specific limitations on this), and the uncoiling arm is raised 20° relative to the uncoiling position, the first support roller is controlled to be raised to a second preset height, and the second support roller is controlled to be raised to a third preset height. This causes the center of the steel coil formed from the silicon steel intermediate billet to shift backward, increasing the difficulty of forward transmission and preventing centerline fluctuations caused by excessively fast transmission speed of the silicon steel intermediate billet during the finishing mill threading process, which could lead to threading failure of the silicon steel intermediate billet in the finishing mill unit. The second preset height is higher than the third preset height, and the third preset height is higher than the first preset height.

[0049] Step S4: When the first stand of the finishing mill bites the silicon steel intermediate billet, the first and second support rolls are controlled to descend to the first preset height to facilitate the transfer of the silicon steel intermediate billet, so as to complete the winding and unwinding of the silicon steel intermediate billet.

[0050] In one embodiment of this application, the first preset height can be -140mm.

[0051] In one embodiment of this application, the second preset height can be -50mm.

[0052] In one embodiment of this application, the third preset height can be -100mm.

[0053] In this application, the first preset height can be -140mm, the second preset height can be -50mm, and the third preset height can be -100mm. The first preset height, the second preset height, and the third preset height can also be other height values. The height values ​​of the first preset height, the second preset height, and the third preset height can be adjusted according to actual needs. It should be noted that the second preset height must be higher than the third preset height, and the third preset height must be higher than the first preset height.

[0054] In this application, it should be noted that the first preset height, the second preset height, and the third preset height are all relative to the track elevation line (which is generally 0). For example, when the first preset height is -140mm, it is a height position 140mm lower than the track elevation line.

[0055] In one embodiment of this application, adjusting the lead rate of the first support roller according to the roll diameter of the silicon steel intermediate billet includes:

[0056] If the diameter of the silicon steel intermediate billet is smaller than the preset diameter, the lead rate of the first support roller is adjusted to the first lead rate.

[0057] If the diameter of the silicon steel intermediate billet is greater than or equal to the preset diameter, the lead rate of the first support roller is adjusted to the second lead rate.

[0058] In one embodiment of this application, the preset roll diameter can be 1000 mm.

[0059] In this application, the silicon steel intermediate billet is wound using the plate and coil box. If the roll diameter of the silicon steel intermediate billet is smaller than a preset roll diameter (the preset roll diameter can be 1000 mm or other roll diameters; this application does not specifically limit the preset roll diameter), the lead rate of the first support roller is adjusted to a first lead rate. When the roll diameter of the silicon steel intermediate billet is smaller than the preset roll diameter, especially when the head of the silicon steel intermediate billet is threaded by the bending roller, the lead rate of the first support roller can only be adjusted to the first lead rate. If the lead rate of the first support roller is too large, it will affect the curling and forming of the head.

[0060] During the winding of the silicon steel intermediate billet, in the later stages of production, the first lead rate becomes significantly low, resulting in insufficient driving force and slippage during winding. To avoid this problem, the lead rate of the first winding roller can be adjusted according to the roll diameter of the silicon steel intermediate billet. If the roll diameter of the silicon steel intermediate billet is greater than or equal to a preset roll diameter, the lead rate of the first winding roller is adjusted to a second lead rate to ensure that the silicon steel intermediate billet can be wound into a coil.

[0061] In one embodiment of this application, the first lead rate may be 0.5%.

[0062] In one embodiment of this application, the formula for calculating the second lead rate is:

[0063] s = (L - 1000mm) * 5% + 0.5%

[0064] Where s is the second lead rate of the first support roller, and L is the roll diameter of the silicon steel intermediate billet.

[0065] In this application, the first lead rate can be 0.5%, or it can be other values, which can be adjusted according to actual production needs. This application does not impose any particular restrictions on this. The value of the second lead rate can be calculated according to the above formula. When the roll diameter of the silicon steel intermediate billet is greater than or equal to the preset roll diameter, the lead rate of the first support roll is adjusted to the second lead rate to ensure the stability of the entire production process of the silicon steel intermediate billet.

[0066] In one embodiment of this application, the method further includes: when the tail of the silicon steel intermediate billet reaches a preset position, controlling the opening degree of the stabilizer to open a preset opening degree so that the winding of the silicon steel intermediate billet is completed.

[0067] In this application, a short-stroke control for the tail of the stabilizer is developed. After the second hot inspection unloading at the front of the plate and coil box, the tail of the silicon steel intermediate billet has reached a preset position. The opening of the stabilizer can be controlled to open to a preset position (the preset position can be 100mm, or other values, which can be selected according to the actual situation, and this application does not impose any special restrictions) based on the width of the tail of the silicon steel intermediate billet. This is to prevent excessive tail sickle bend from interfering with the stabilizer and to prevent the silicon steel intermediate billet from failing to be rolled due to low friction.

[0068] 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.

[0069] In one specific embodiment of this application, reference is made to Figure 2 , Figure 2 The diagram illustrates an equipment layout of a plate coil box used in silicon steel production according to one embodiment of this application. The plate coil box 207 is installed in the finishing mill entrance area and is used to coil the silicon steel intermediate billet from the roughing mill without a core before uncoiling it and sending it into the finishing mill.

[0070] After roughing in the roughing mill, the silicon steel intermediate billet is transported to the coil box 207 via a roller conveyor. Once the billet arrives in the coil box 207, the bending roller 201 and the shaping roller 202 inside the coil box 207 begin coreless coiling. During coreless coiling, the head of the silicon steel intermediate billet is first guided through the bending roller 201, and then the bending roller 201 and the shaping roller 202 work together to coil it, ensuring the formation of the coil eye on the silicon steel intermediate billet.

[0071] When winding the silicon steel intermediate billet, the lead rate of the first winding roller 203 is adjusted according to the roll diameter of the silicon steel intermediate billet. If the roll diameter of the silicon steel intermediate billet is less than 1000mm, the lead rate of the first winding roller 203 is adjusted to 0.5%; if the roll diameter of the silicon steel intermediate billet is greater than or equal to the preset roll diameter, the lead rate of the first winding roller 203 is adjusted to s = (L - 1000mm) * 5% + 0.5%, where s is the lead rate of the first winding roller 203 when the roll diameter of the silicon steel intermediate billet is greater than or equal to 1000mm.

[0072] After the silicon steel intermediate billet is wound up, the first support roller 203 and the second support roller 204 are controlled to descend to -140mm so that the unwinding arm 205 can smoothly reach the unwinding position, ensuring that the unwinding arm shovel head 206 of the unwinding arm 205 can be smoothly inserted, so that the head of the silicon steel intermediate billet can be unwound normally.

[0073] After the silicon steel intermediate billet begins to be uncoiled, when the head of the silicon steel intermediate billet exceeds the plate and coil box 207 by one meter and the uncoiling arm 205 is raised 20° relative to the uncoiling position, the first support roller 203 is controlled to be raised to -50mm and the second support roller 204 is controlled to be raised to -100mm.

[0074] When the first stand of the finishing mill bites the silicon steel intermediate billet, the first support roll 203 and the second support roll 204 are controlled to descend to -140mm to complete the winding and unwinding of the silicon steel intermediate billet.

[0075] The following describes an embodiment of the apparatus described in this application, which can be used to execute the control method for applying the plate and coil box to silicon steel production 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 applying the plate and coil box to silicon steel production described above.

[0076] Figure 3 This is a structural block diagram of a control device for a plate and coil box used in silicon steel production, according to an embodiment of this application.

[0077] Reference Figure 3 As shown, a control device for a plate and coil box applied to silicon steel production according to an embodiment of this application includes: an adjustment unit 301, a first control unit 302, a second control unit 303, and a third control unit 304.

[0078] The adjustment unit 301 is used to roll up the silicon steel intermediate billet through the plate roll box and adjust the lead rate of the first support roll according to the roll diameter of the silicon steel intermediate billet. The lead rate is the ratio of the speed difference between the first support roll and the bending roll to the speed of the bending roll.

[0079] The first control unit 302 is used to control the first and second support rollers to descend to a first preset height after the silicon steel intermediate billet is coiled, so that the uncoiling arm reaches the uncoiling position to uncoil.

[0080] The second control unit 303 is used to control the first support roller to be raised to a second preset height and the second support roller to be raised to a third preset height when the head of the silicon steel intermediate billet exceeds the preset distance of the plate and coil box and the uncoiling arm is raised by 20° relative to the uncoiling position. The second preset height is higher than the third preset height and the third preset height is higher than the first preset height.

[0081] The third control unit 304 is used to control the first and second support rolls to descend to the first preset height when the first stand of the finishing mill bites the silicon steel intermediate billet, so as to complete the winding and unwinding of the silicon steel intermediate billet.

[0082] 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.

[0083] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0084] Firstly, by adopting the solution proposed in this application, the slippage phenomenon during the winding process of the silicon steel intermediate billet is reduced by dynamically adjusting the lead rate of the first support roller based on the change of the roll diameter of the silicon steel intermediate billet using a plate roll box.

[0085] Secondly, by adopting the solution proposed in this application, the height of the first and second support rollers is dynamically adjusted during the uncoiling process of the silicon steel intermediate billet, thus solving the problem of premature transmission of the silicon steel intermediate billet without affecting the normal transmission of the silicon steel intermediate billet.

[0086] Thirdly, by adopting the solution proposed in this application, the opening degree of the control stabilizer is adjusted according to the width of the tail of the silicon steel intermediate billet, so as to solve the problem of the winding failure caused by the tail of the silicon steel intermediate billet being blocked.

[0087] 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 control method for using a sheet / coil box in silicon steel production, characterized in that, The method includes: The silicon steel intermediate billet is wound up by a plate coil box. The lead rate of the first support roller is adjusted according to the roll diameter of the silicon steel intermediate billet. The lead rate is the ratio of the speed difference between the first support roller and the bending roller to the speed of the bending roller. After the silicon steel intermediate billet is coiled, the first and second support rollers are controlled to descend to the first preset height so that the uncoiling arm reaches the uncoiling position for uncoiling. When the head of the silicon steel intermediate billet exceeds the preset distance of the plate and coil box, and the uncoiling arm is raised by 20° relative to the uncoiling position, the first support roller is controlled to be raised to the second preset height, and the second support roller is controlled to be raised to the third preset height, wherein the second preset height is higher than the third preset height, and the third preset height is higher than the first preset height; When the first stand of the finishing mill bites the silicon steel intermediate billet, the first and second support rolls are controlled to descend to the first preset height to complete the winding and unwinding of the silicon steel intermediate billet. The adjustment of the lead rate of the first support roller based on the roll diameter of the silicon steel intermediate billet includes: If the diameter of the silicon steel intermediate billet is smaller than the preset diameter, the lead rate of the first support roller is adjusted to the first lead rate. If the diameter of the silicon steel intermediate billet is greater than or equal to the preset diameter, the lead rate of the first support roller is adjusted to the second lead rate. Wherein, the preset roll diameter is 1000mm, the first lead rate can be 0.5%, and the formula for calculating the second lead rate is: Where s is the second lead rate of the first support roller, and L is the roll diameter of the silicon steel intermediate billet.

2. The method according to claim 1, characterized in that, The first preset height is -140mm.

3. The method according to claim 1, characterized in that, The second preset height is -50mm.

4. The method according to claim 1, characterized in that, The third preset height is -100mm.

5. The method according to claim 1, characterized in that, The method further includes: When the tail of the silicon steel intermediate billet reaches the preset position, the opening of the control stabilizer is opened to the preset degree so that the winding of the silicon steel intermediate billet is completed.

6. A control device for a plate / coil box used in silicon steel production, characterized in that, The device includes: An adjustment unit is used to wind up a silicon steel intermediate billet through a plate coil box and adjust the lead rate of the first support roller according to the roll diameter of the silicon steel intermediate billet. The lead rate is the ratio of the speed difference between the first support roller and the bending roller to the speed of the bending roller. The first control unit is used to control the first and second support rollers to descend to a first preset height after the silicon steel intermediate billet is coiled, so that the uncoiling arm reaches the uncoiling position for uncoiling. The second control unit is used to control the first support roller to be raised to a second preset height and the second support roller to be raised to a third preset height when the head of the silicon steel intermediate billet exceeds the preset distance of the plate and coil box and the uncoiling arm is raised by 20° relative to the uncoiling position. The second preset height is higher than the third preset height and the third preset height is higher than the first preset height. The third control unit is used to control the first and second support rolls to descend to the first preset height when the first stand of the finishing mill bites the silicon steel intermediate billet, so as to complete the winding and unwinding of the silicon steel intermediate billet. The adjustment of the lead rate of the first support roller based on the roll diameter of the silicon steel intermediate billet includes: If the diameter of the silicon steel intermediate billet is smaller than the preset diameter, the lead rate of the first support roller is adjusted to the first lead rate. If the diameter of the silicon steel intermediate billet is greater than or equal to the preset diameter, the lead rate of the first support roller is adjusted to the second lead rate. Wherein, the preset roll diameter is 1000mm, the first lead rate can be 0.5%, and the formula for calculating the second lead rate is: Where s is the second lead rate of the first support roller, and L is the roll diameter of the silicon steel intermediate billet.

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