Rolling control method and device, storage medium and electronic equipment

Abstract

The invention discloses a rolling control method and device, a storage medium and electronic equipment. The method comprises the following steps: acquiring strip steel change information between first strip steel and second strip steel; wherein the first strip steel and the second strip steel are two front and back adjacent strip steel welded in the strip steel production process; according to the strip steel change information, the shearing depth of a crescent shear for shearing the strip steel at the two ends of the welding seam is adjusted; and according to the strip steel change information, the rolling parameter variable quantity is determined, and the rolling parameter variable quantity is sent to a rolling mill so as to control the rolling mill to roll the sheared first strip steel and the sheared second strip steel. Through the technical scheme provided by the invention, the shearing depth of the crescent shear and the rolling parameter variation of the rolling mill can be dynamically adjusted based on the strip steel change information, so that the rolling process of the strip steel is precisely regulated and controlled, and the continuity and stability of the whole rolling process are ensured.

Description

Technical Field

[0001] This application belongs to the field of strip steel production technology, and in particular relates to a rolling control method, device, storage medium and electronic equipment. Background Technology

[0002] In the production of cold-rolled strip steel, to avoid stress concentration and other problems caused by abrupt changes in strip specifications, crescent shears are typically used to cut the ends of the weld in an arc shape, forming a "crescent bend" area between the front and rear strips. Because the width of this area decreases sharply, it can easily cause various types of mill malfunctions during high-speed rolling.

[0003] Currently, using crescent-shaped shears at a specific depth to cut both ends of the weld is not applicable to production scenarios of strip steel of different specifications, which leads to inaccurate parameter control when rolling strip steel before and after the weld (including strip steel in the "crescent bend" area). Summary of the Invention

[0004] The embodiments of this application provide a rolling control method, apparatus, storage medium, and electronic device, which can dynamically adjust the shearing depth of the crescent shear and the rolling parameter changes of the rolling mill based on strip steel variation information, thereby precisely controlling the strip steel rolling process and ensuring the continuity and stability of the entire rolling process.

[0005] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0006] According to a first aspect of the embodiments of this application, a rolling control method is provided, comprising:

[0007] Obtain information on the changes in strip steel between the first strip steel and the second strip steel; wherein, the first strip steel and the second strip steel are two adjacent strip steels welded before and after each other during the strip steel production process;

[0008] Based on the strip steel change information, adjust the cutting depth of the crescent shears used to cut the strip steel at both ends of the weld.

[0009] Based on the strip steel variation information, the amount of change in rolling parameters is determined, and the amount of change in rolling parameters is sent to the rolling mill to control the rolling mill to roll the first and second strip steel after shearing.

[0010] In some embodiments of this application, based on the aforementioned scheme, the cutting depth of the crescent-shaped shears used to cut the strip at both ends of the weld is adjusted according to the strip change information, including:

[0011] If the width change in the strip change information is not greater than the preset first width threshold, the cutting depth of the crescent shears used to cut the strip at both ends of the weld will be adjusted to the preset first target depth.

[0012] If the width change is greater than the first width threshold, the corresponding second target depth is determined based on the width change, and the cutting depth of the crescent shears is adjusted to the second target depth; wherein, the second target depth is positively correlated with the width change, and the second target depth is greater than the first target depth.

[0013] In some embodiments of this application, based on the aforementioned scheme, adjusting the shearing depth of the crescent shears used to cut the strip at both ends of the weld according to the strip change information further includes:

[0014] If the width change is zero, then based on the strip change information, determine whether the thickness or steel grade between the first strip and the second strip has changed;

[0015] If so, adjust the cutting depth of the crescent scissors to the first target depth.

[0016] In some embodiments of this application, based on the aforementioned scheme, the amount of change in rolling parameters is determined according to the strip change information, and the amount of change in rolling parameters is sent to the rolling mill to control the rolling mill to roll the sheared first and second strips, including:

[0017] Based on the width change, the corresponding target rolling speed is determined from the preset rolling speed range; wherein, the target rolling speed is inversely correlated with the width change.

[0018] The target rolling speed is sent to the rolling mill to control the rolling mill to roll the sheared zone based on the target rolling speed.

[0019] In some embodiments of this application, based on the foregoing scheme, the change in rolling parameters includes a first rolling parameter, which includes the pre-tension and bending roll force; determining the change in rolling parameters based on strip change information includes:

[0020] The corresponding increase range is determined based on the change in width; the increase range is positively correlated with the change in width.

[0021] Based on the range of increases, the first rolling parameters of each stand when the first strip passes through the rolling mill, and the first rolling parameters of each stand when the second strip passes through the rolling mill, the first rolling parameters of each stand before the shearing zone passes through the rolling mill, the first rolling parameters of each stand when the shearing zone passes through the rolling mill, and the first rolling parameters of each stand after the shearing zone passes through the rolling mill are determined.

[0022] In some embodiments of this application, based on the aforementioned scheme, according to the amplification range, the first rolling parameters of each stand when the first strip passes through the rolling mill, and the first rolling parameters of each stand when the second strip passes through the rolling mill, are used to determine the first rolling parameters of each stand before the shearing zone passes through the rolling mill, the first rolling parameters of each stand when the shearing zone passes through the rolling mill, and the first rolling parameters of each stand after the shearing zone passes through the rolling mill, including:

[0023] Based on the range of increase and the first rolling parameters of each stand when the first strip passes through the rolling mill, determine the first rolling parameters of each stand before the shearing zone passes through the rolling mill.

[0024] Based on the range of increase and the first rolling parameters of each stand when the second strip passes through the rolling mill, determine the first rolling parameters of each stand when the shearing zone passes through the rolling mill.

[0025] Based on the first rolling parameters of each stand when the second strip passes through the rolling mill, determine the first rolling parameters of each stand after the shearing zone passes through the rolling mill.

[0026] In some embodiments of this application, based on the foregoing scheme, the change in rolling parameters further includes a second rolling parameter, which includes rolling force; determining the change in rolling parameters based on strip change information further includes:

[0027] If the width change is greater than the second width threshold, then the second rolling parameters of each stand when the shearing zone passes through the rolling mill are determined according to the preset reduction range and the second rolling parameters of each stand when the first strip passes through the rolling mill; wherein, the second width threshold is greater than the first width threshold.

[0028] According to a second aspect of the embodiments of this application, a rolling control device is provided, comprising:

[0029] The information acquisition module is used to acquire strip change information between the first strip and the second strip; wherein the first strip and the second strip are two adjacent strips welded before and after each other during the strip production process;

[0030] The strip shearing module is used to adjust the shearing depth of the crescent shears that cut the strip at both ends of the weld according to the strip change information;

[0031] The rolling control module is used to determine the amount of change in rolling parameters based on the strip change information, and send the amount of change in rolling parameters to the rolling mill to control the rolling mill to roll the first and second strips after shearing.

[0032] According to a third aspect of the embodiments of this application, a computer-readable storage medium is provided, which stores computer program instructions that, when loaded and executed by a processor, implement the steps of the method as described in any of the first aspects above.

[0033] According to a fourth aspect of the embodiments of this application, an electronic device is provided, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements the steps of the method as described in any of the first aspects above.

[0034] According to a fifth aspect of the embodiments of this application, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the method as described in any of the first aspects above.

[0035] In this application, strip variation information between a first strip and a second strip is obtained; wherein the first strip and the second strip are two adjacent strips welded together during the strip production process; based on the strip variation information, the shearing depth of the crescent shear used to cut the strips at both ends of the weld is adjusted; based on the strip variation information, the change in rolling parameters is determined, and the change in rolling parameters is sent to the rolling mill to control the rolling mill to roll the sheared first and second strips. By determining the strip variation information during the strip production process and dynamically adjusting the shearing depth of the crescent shear, wavy defects caused by sudden changes in the width of the shearing area are avoided. Furthermore, the change in rolling parameters of the rolling mill is dynamically adjusted to compensate for fluctuations caused by strip variations as much as possible, enabling precise control of the strip rolling process and ensuring the continuity and stability of the entire rolling process.

[0036] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0037] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0038] Figure 1 A schematic diagram illustrating a scenario where the strip steel at both ends of a weld can be sheared using embodiments of this application;

[0039] Figure 2 A flowchart of the rolling control method in an embodiment of this application is shown;

[0040] Figure 3 A flowchart illustrating the adjustment of the cutting depth of the crescent-shaped shears in an embodiment of this application is shown;

[0041] Figure 4 A flowchart illustrating the adjustment of rolling parameters of a rolling mill in an embodiment of this application is shown;

[0042] Figure 5 A flowchart illustrating the determination of rolling parameter variations in an embodiment of this application is shown;

[0043] Figure 6Another flowchart of the rolling control method in an embodiment of this application is shown;

[0044] Figure 7 A block diagram of the rolling control device in an embodiment of this application is shown;

[0045] Figure 8 A schematic diagram of the structure of an electronic device in an embodiment of this application is shown. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] 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.

[0048] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0049] 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.

[0050] It should also 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.

[0051] To enable those skilled in the art to better understand this application, firstly, in conjunction with Figure 1 A brief description of the application scenarios involved in this application is provided.

[0052] See Figure 1 The diagram illustrates a scenario where the strip steel at both ends of the weld can be sheared using embodiments of this application.

[0053] In the strip steel production process, to ensure uninterrupted operation of the production line, two adjacent strip steels are typically welded together. Since the width, thickness, and steel grade of the two adjacent strip steels may differ, this can lead to stress concentration and uneven load distribution at the rolling interface. To solve this problem, crescent shears are used to cut the strip steel at both ends of the weld, forming a "crescent bend" structure to reduce the width and alleviate stress in the transition area (i.e., the shearing area).

[0054] However, sudden changes in the width of the shearing zone can lead to wavy defects, and in severe cases, folded wavy shapes, increasing the risk of strip breakage. In this application, information on the strip variation between two adjacent strips (i.e., the first strip and the second strip) is obtained, and the shearing depth of the crescent shear is adaptively adjusted based on this information. This avoids excessive shearing depth and thus mitigates wavy defects.

[0055] Furthermore, during the rolling process in the shear zone, the rolling parameters of the mill (such as pretension, bending force, and rolling force) become unstable, affecting the quality of strip steel production. In this application, the rolling parameters of the mill are adaptively adjusted based on the strip steel variation information to compensate for the fluctuations caused by the strip steel variation as much as possible, thereby precisely controlling the strip steel rolling process and ensuring the continuity and stability of the entire rolling process.

[0056] For example, the control system acquires strip change information and determines the shearing depth of the crescent shear and the rolling parameter change of the rolling mill based on the strip change information. Then, the shearing depth is sent to the crescent shear and the rolling parameter change is sent to the rolling mill to realize the shearing process of the strip at both ends of the weld and the rolling process of the sheared strip.

[0057] In one exemplary embodiment, see Figure 2 The flowchart of the rolling control method in the embodiments of this application is shown below, and is described in detail below:

[0058] Step 201: Obtain information on the changes in strip steel between the first strip steel and the second strip steel.

[0059] The first strip and the second strip are two adjacent strips welded together during the strip production process. Strip variation information is used to characterize the specific dimensional changes between the first and second strips, including but not limited to changes in width, thickness, and steel grade.

[0060] For example, the first strip has a raw material width of 1280 mm and a finished product width of 1280 mm, while the second strip has a raw material width of 1260 mm and a finished product width of 1260 mm. The first strip has a raw material thickness of 4.0 mm and a finished product thickness of 0.71 mm, while the second strip has a raw material thickness of 4.5 mm and a finished product thickness of 0.82 mm. The first strip is made of M3A33 steel, and the second strip is made of M3A36 steel. The first strip has a yield strength of 205 MPa, and the second strip has a yield strength of 195 MPa. The control system can directly acquire the above information and analyze it to obtain strip variation information.

[0061] Step 202: Based on the strip change information, adjust the cutting depth of the crescent shears used to cut the strip at both ends of the weld.

[0062] The shearing depth of the crescent shear refers to the shearing depth actually used in the shearing process. The greater the specific specification change represented by the strip steel variation information, the greater the required shearing depth of the crescent shear. The control system can determine the shearing depth of the crescent shear based on the strip steel variation information, and then send the shearing depth to the crescent shear so that the crescent shear can adjust the shearing depth in time and shear the strip steel at both ends of the weld when the weld passes through.

[0063] For example, when the specific specification change indicated by the strip steel variation information is significant, a narrow strip steel edge positioning technique can be used. Using the effective rolling edge of the narrow strip steel as a reference, the width is symmetrically reduced to both sides by a certain amount, such as 35mm, with the accuracy controlled within 1.5mm, forming a "crescent moon" structure. The edge alignment is verified using a laser profilometer, controlling the deviation within 0.5mm to minimize rolling instability caused by specification jumps. Here, narrow strip steel refers to the strip steel with the smaller width between the first and second strip steels, while the wider strip steel is the wide strip steel. When the width of the narrow strip steel is 1530mm and the width of the wide strip steel is 1680mm, the width change is 150mm, indicating a significant specification change indicated by the strip steel variation information. The shearing depth of the crescent shear is then adjusted to 110mm, at which point the width of the narrow strip steel is reduced by 70mm, and the width of the wide strip steel is reduced by 220mm.

[0064] Step 203: Based on the strip change information, determine the amount of change in rolling parameters and send the amount of change in rolling parameters to the rolling mill to control the rolling mill to roll the sheared first and second strips.

[0065] The rolling parameter variation refers to the rolling parameters that need to be adjusted for each stand in the rolling mill, including but not limited to rolling speed, front tension, bending roll force, and rolling force. The control system can determine the rolling parameter variation based on the strip change information, and then send the rolling parameter variation to the rolling mill so that the rolling mill can adjust the rolling parameters of each stand in a timely manner. As the strip passes through, it sequentially rolls the first strip, the shearing zone, and the second strip based on different rolling parameters.

[0066] For example, the rolling mill includes five stands, S1-S5, and the rolling parameters of each stand may differ. As the strip steel arrives at each stand on the production line, the rolling parameters of the next stand are adjusted to ensure real-time rolling control, so that each strip steel segment meets the quality requirements.

[0067] Because the width of the shearing zone decreases sharply, extra attention must be paid to the accuracy of the rolling parameters as the shearing zone passes through each stand of the rolling mill. This can be adjusted in multiple steps. Before the shearing zone passes through the rolling mill, if it reaches a position 5 meters from stand S1, adjust the rolling parameters once. While the shearing zone passes through the rolling mill, if it reaches stand S2, S3, or S4, adjust the rolling parameters for the subsequent stands again. After the shearing zone passes through the rolling mill, if it leaves stand S5, finally adjust the rolling parameters for all stands.

[0068] In this application, strip variation information between a first strip and a second strip is obtained; wherein the first strip and the second strip are two adjacent strips welded together during the strip production process; based on the strip variation information, the shearing depth of the crescent shear used to cut the strips at both ends of the weld is adjusted; based on the strip variation information, the change in rolling parameters is determined, and the change in rolling parameters is sent to the rolling mill to control the rolling mill to roll the sheared first and second strips. By determining the strip variation information during the strip production process and dynamically adjusting the shearing depth of the crescent shear, wavy defects caused by sudden changes in the width of the shearing area are avoided. Furthermore, the change in rolling parameters of the rolling mill is dynamically adjusted to compensate for fluctuations caused by strip variations as much as possible, enabling precise control of the strip rolling process and ensuring the continuity and stability of the entire rolling process.

[0069] Based on the above embodiments, in an exemplary embodiment, if the width change in the strip change information is not greater than a preset first width threshold, the cutting depth of the crescent shears used to cut the strip at both ends of the weld is adjusted to a preset first target depth; if the width change is greater than the first width threshold, a corresponding second target depth is determined based on the width change, and the cutting depth of the crescent shears is adjusted to the second target depth; wherein, the second target depth is positively correlated with the width change, and the second target depth is greater than the first target depth.

[0070] See Figure 3Adjusting the cutting depth of the crescent scissors specifically includes:

[0071] Step 301: Determine whether the width change in the strip change information is greater than the preset first width threshold.

[0072] If yes, proceed to step 302; otherwise, proceed to step 303.

[0073] Step 302: Determine the corresponding second target depth based on the width change, and adjust the cutting depth of the crescent shears to the second target depth.

[0074] Step 303: Adjust the cutting depth of the crescent shears used to cut the strip at both ends of the weld to a preset first target depth.

[0075] The width variation between the first and second strips refers to the absolute value of the difference between their widths. The first width threshold and the first target depth are preset values, while the second target depth is a variable. If the width variation exceeds the first width threshold, it indicates a significant change in specifications, requiring an increased cutting depth from the crescent shears. If the width variation is not greater than the first width threshold, it indicates a minor change in specifications, and a standard cutting depth is sufficient.

[0076] Optionally, the first width threshold is 30mm. When the width change between the first and second strips is greater than 30mm, it can be determined that the specification change is significant, and the cutting depth of the crescent shears needs to be increased. For example, if the width of the first strip is 1530mm and the width of the second strip is 1680mm, with a width change of 150mm, the narrow strip (i.e., the first strip) is reduced by 35mm on each side (a total reduction of 70mm), and the wide strip (i.e., the second strip) is reduced by 110mm on each side (a total reduction of 220mm). The second target depth is the 110mm reduction in length on one side of the wide strip, and thus the cutting depth of the crescent shears is adjusted to 110mm.

[0077] Optionally, the first width threshold is 30mm. When the width variation between the first and second strips is no more than 30mm, it can be determined that the specification variation is small, and a conventional shearing depth can be used. For example, if the width of the first strip is 1280mm and the width of the second strip is 1260mm, with a width variation of 20mm and a first target depth of 50mm, the narrow strip (i.e., the second strip) is reduced by 40mm on each side (a total reduction of 80mm), and the wide strip (i.e., the first strip) is reduced by 50mm on each side (a total reduction of 100mm), thereby adjusting the shearing depth of the crescent shears to 50mm.

[0078] In this application, a first width threshold is used to divide the range of width variation, providing two different ways to determine the shearing depth of the crescent shear under different conditions. When the width variation is greater than the first width threshold, a dynamically changing second target depth is determined based on the width variation. The larger the width variation, the larger the second target depth. When the width variation is not greater than the first width threshold, a fixed value, i.e., the first target depth, is directly selected. By determining the shearing depth of the crescent shear in this way, the shearing depth can be adapted to the actual strip steel production conditions, improving the effect of relieving stress in the shearing area, while avoiding waviness defects as much as possible and reducing the risk of strip breakage.

[0079] Based on the above embodiments, in an exemplary embodiment, adjusting the cutting depth of the crescent shears further includes: if the width change is zero, determining whether the thickness or steel grade between the first strip and the second strip has changed based on the strip change information; if so, adjusting the cutting depth of the crescent shears to the first target depth.

[0080] When the width change is zero, the width of the first strip is the same as that of the second strip. At this time, we continue to judge the changes in other specifications of the first and second strips based on the strip change information.

[0081] Optionally, when the width of the first strip and the width of the second strip are the same, the cutting depth of the crescent shear is determined as the first target depth when the thickness between the first strip and the second strip changes; the cutting depth of the crescent shear is determined as the first target depth when the steel grade between the first strip and the second strip changes; and the cutting depth of the crescent shear is determined as the first target depth when the steel grades between the first strip and the second strip both change.

[0082] This application further describes other methods for determining the shearing depth of crescent shears. In addition to determining the shearing depth based on the width change in the strip change information, the shearing depth can also be determined based on the thickness and steel type in the strip change information.

[0083] Based on the above embodiments, in an exemplary embodiment, see [link to example]. Figure 4 Determine the variation in rolling parameters and perform rolling based on the variation in rolling parameters, specifically including:

[0084] Step 401: Determine the corresponding target rolling speed from the preset rolling speed range based on the width change.

[0085] Among them, the target rolling speed is inversely correlated with the width change.

[0086] Understandably, when the rolling speed is too low, the coefficient of friction between the strip and the rolls increases significantly, leading to an abnormally high rolling force. This can easily cause double-sided wavy stripe phenomena, affecting strip quality. Conversely, when the rolling speed is too high, it becomes difficult to synchronously adjust the rolling parameters of each stand in the mill, making it impossible to respond promptly to rolling changes caused by the shearing zone. Therefore, selecting an appropriate rolling speed can effectively avoid many quality problems and provide ample time for adjusting rolling parameters.

[0087] The preset rolling speed range is a reasonable range determined based on extensive experiments, expressed as 140-180 m / min. The greater the width variation, the lower the target rolling speed. For example, when the width variation between the first and second strips is 20 mm, the corresponding target rolling speed is determined to be 160 m / min; when the width variation between the first and second strips is 150 mm, the corresponding target rolling speed is determined to be 140 m / min.

[0088] Step 402: Send the target rolling speed to the rolling mill to control the rolling mill to roll the shearing zone based on the target rolling speed.

[0089] The control system sends the target rolling speed to the rolling mill, causing the mill to adjust the current rolling speed to the target speed when the weld seam reaches 5 meters before the S1 stand. In this way, the rolling speed remains at the target value throughout the entire process of the shearing zone passing through the mill, ensuring the continuity and stability of the entire process.

[0090] In this application, under the condition that the rolling speed is within a reasonable range, the rolling speed of the rolling mill is dynamically adjusted based on the width change between the first strip and the second strip, so as to achieve more precise control of the rolling process, avoid the rolling speed being too high or too low, reduce the risks of abnormal indentation of the work rolls and impact load on the support roll bearings, and extend the service life of various equipment in the rolling mill.

[0091] Based on the above embodiments, in an exemplary embodiment, the variation in rolling parameters includes a first rolling parameter, which includes the pre-tension and the bending roll force, see [link to relevant documentation]. Figure 5 Determine the variation in rolling parameters, specifically including:

[0092] Step 501: Determine the corresponding range of increase based on the change in width.

[0093] The range of increase is positively correlated with the change in width. The range of increase can be maintained between 5% and 20%. The greater the change in width, the greater the corresponding range of increase. This allows the adjusted front tension and bending roll force to adapt to the changes in strip specifications.

[0094] Optionally, at least three increment ranges can be determined: 5-10%, 10-15%, and 15-20%. When the width change is less than the first width threshold (e.g., less than 30mm), the 5-10% increment range is selected; when the width change is not less than the first width threshold and less than the second width threshold (e.g., not less than 30mm and less than 100mm), the 10-15% increment range is selected; when the width change is not less than the second width threshold (e.g., not less than 100mm), the 15-20% increment range is selected. It should be noted that, based on existing strip steel production standards, the width change between the first and second strip steel is generally kept within 200mm.

[0095] Step 502: Based on the range of increase, the first rolling parameters of each stand when the first strip passes through the rolling mill, and the first rolling parameters of each stand when the second strip passes through the rolling mill, determine the first rolling parameters of each stand before the shearing zone passes through the rolling mill, the first rolling parameters of each stand when the shearing zone passes through the rolling mill, and the first rolling parameters of each stand after the shearing zone passes through the rolling mill.

[0096] The first strip is the strip that passes through the rolling mill first, and the second strip is the strip that passes through the rolling mill later. The first rolling parameters of each stand when the first strip passes through the rolling mill refer to the secondary set values ​​corresponding to the first strip. Similarly, the first rolling parameters of each stand when the second strip passes through the rolling mill refer to the secondary set values ​​corresponding to the second strip. The secondary set values ​​include, but are not limited to, the standard pretension and the standard bending roll force, and these data can be obtained directly.

[0097] To ensure that the shearing zone can pass smoothly through the rolling mill, guarantee the rolling quality of the strip, enhance the control effect of the bending roll, and optimize the strip shape quality, it is necessary to increase the first rolling parameters of each stand in the rolling mill by the corresponding increment range based on the existing level (i.e., the secondary setting value corresponding to the first strip) before the shearing zone enters the S1 stand of the rolling mill, so as to obtain the first rolling parameters of each stand before the shearing zone passes through the rolling mill.

[0098] Furthermore, after the shearing zone enters the S1 stand of the rolling mill and before leaving the S5 stand, the first rolling parameters of each stand in the rolling mill are continuously and dynamically adjusted. Based on the secondary setting value corresponding to the second strip, the corresponding increase range can be gradually increased to obtain the first rolling parameters of each stand when the shearing zone passes through the rolling mill.

[0099] Furthermore, after the shearing zone leaves the S5 stand of the rolling mill, the normal rolling process of the rolling mill is resumed, and the first rolling parameters of each stand in the rolling mill are adjusted to the secondary setting value corresponding to the second strip, so as to obtain the first rolling parameters of each stand after the shearing zone passes through the rolling mill.

[0100] Optionally, the first rolling parameters of each stand in the rolling mill can be adjusted progressively based on the travel position of the shearing zone. The control system determines in advance the first rolling parameters of each stand before, during, and after the shearing zone passes through the rolling mill, and then sends these first rolling parameters to the rolling mill. In this way, the rolling mill can begin adjusting the first rolling parameters of each stand before the shearing zone enters stand S1; that is, the first rolling parameters of each stand are adjusted before the shearing zone enters it. For example, the first rolling parameters of stand S1 are adjusted in advance before the shearing zone enters stand S1, and similarly, the first rolling parameters of stand S2 are adjusted in advance before the shearing zone passes through stand S1 and enters stand S2. Further details are omitted.

[0101] Optionally, based on the range of increase and the first rolling parameters of each stand when the first strip passes through the rolling mill, the first rolling parameters of each stand before the shearing zone passes through the rolling mill are determined; based on the range of increase and the first rolling parameters of each stand when the second strip passes through the rolling mill, the first rolling parameters of each stand when the shearing zone passes through the rolling mill are determined; based on the first rolling parameters of each stand when the second strip passes through the rolling mill, the first rolling parameters of each stand after the shearing zone passes through the rolling mill are determined.

[0102] In one exemplary implementation, when the width change is less than a first width threshold, such as less than 30mm, an increase range of 5-10% is selected.

[0103] As shown in Table 1 below, before the shearing zone passes through the rolling mill, the front tension and bending roll force of the S1-S4 stands are increased by 5-10% based on the front tension and bending roll force of the S1-S4 stands when the first strip passes through the rolling mill, while the front tension and bending roll force of the S5 stand can remain unchanged temporarily.

[0104]

[0105] Table 1

[0106] As shown in Table 2 below, when the shearing zone passes through the rolling mill, the bending roll force of the S1-S5 stands is increased by 5-10% based on the bending roll force of the S1-S5 stands when the second strip passes through the rolling mill, and the front tension of the S1-S5 stands can remain unchanged temporarily.

[0107]

[0108] Table 2

[0109] After the shearing zone passes through the rolling mill, the normal rolling process of the rolling mill is restored. The front tension and bending roll force of the S1-S5 stands are adjusted to the front tension and bending roll force of the S1-S5 stands when the second strip passes through the rolling mill. The bending roll force of the S5 stand can also be automatically adjusted based on the plate shape closed-loop control system.

[0110] In another exemplary implementation, when the width change is not less than the second width threshold, such as not less than 100mm, the increase range of 15-20% is selected.

[0111] As shown in Table 3 below, before the shearing zone passes through the rolling mill, the front tension and bending roll force of the S1-S4 stands are increased by 15-20% based on the front tension and bending roll force of the S1-S4 stands when the first strip passes through the rolling mill, while the front tension and bending roll force of the S5 stand can remain unchanged temporarily.

[0112]

[0113]

[0114] Table 3

[0115] As shown in Table 4 below, when the shearing zone passes through the rolling mill, the bending roll force of the S1-S5 stands is increased by 15-20% based on the bending roll force of the S1-S5 stands when the second strip passes through the rolling mill, and the front tension of the S1-S5 stands can remain unchanged temporarily.

[0116]

[0117] Table 4

[0118] After the shearing zone passes through the rolling mill, the normal rolling process of the rolling mill is restored. The front tension and bending roll force of the S1-S5 stands are adjusted to the front tension and bending roll force of the S1-S5 stands when the second strip passes through the rolling mill. The bending roll force of the S5 stand can also be automatically adjusted based on the plate shape closed-loop control system.

[0119] It should be noted that in practical applications, it is difficult to adjust the first rolling parameter to a precise target value. Therefore, the above descriptions all indicate that the first rolling parameter is adjusted to a small target range and the deviation is controlled to be small.

[0120] In this application, the variation of strip specifications can be fully considered, and the rolling parameters can be dynamically adjusted. The most suitable key parameters such as the front tension and bending roll force can be calculated quickly and accurately, avoiding the problem of three-dimensional strip shape distortion such as edge waves and middle waves induced by the difference in metal rheological rate in the shearing zone, which can effectively improve the quality of strip production.

[0121] Based on the above embodiments, in an exemplary embodiment, the rolling parameter change amount further includes a second rolling parameter, which includes rolling force. Determining the rolling parameter change amount specifically includes: if the width change amount is greater than a second width threshold, then based on a preset reduction range and the second rolling parameters of each stand when the first strip passes through the rolling mill, determining the second rolling parameters of each stand when the shearing zone passes through the rolling mill; wherein, the second width threshold is greater than the first width threshold.

[0122] When the width variation is too large, it is also necessary to pay attention to the rolling force control of each stand when the shearing zone passes through the rolling mill. Specifically, a second width threshold for the width variation is set, such as 100mm, and a corresponding reduction range is set, such as 10-15%. When the width variation is greater than 100mm, the rolling force of each stand is reduced by 10-15% based on the rolling force of each stand when the first strip passes through the rolling mill, thus obtaining the rolling force of each stand when the shearing zone passes through the rolling mill.

[0123] For example, as the shearing zone passes through the rolling mill, the rolling force of the next stand is reduced by 10-15% each time it reaches a stand. Optionally, when the shearing zone reaches stand S2, the rolling force of stand S3 is reduced by 10-15%, and then when the shearing zone reaches stand S3, the rolling force of stand S4 is reduced by 10-15%. At the same time, the MON (Monitor Thickness Control) system after stand S5 can be turned off. Furthermore, when the shearing zone leaves stand S5, the MON system after stand S5 is turned on in a timely manner, and the rolling force of stand S4 is adjusted based on the actual thickness detection data.

[0124] In this application, the variation of strip specifications can be fully considered, and the rolling parameters can be dynamically adjusted. The key parameter of the most suitable rolling force can be calculated quickly and accurately. By reasonably distributing the rolling force of each stand, the problem of excessive local rolling force caused by the shearing zone can be alleviated, the rolling force burden of the downstream mill can be reduced, and the strip can be ensured to maintain a stable rolling state when passing through each stand, thus meeting the thickness accuracy requirements of the strip.

[0125] To enable those skilled in the art to better understand this application as a whole, the application process of the solution in this application will be briefly described below with a specific embodiment:

[0126] See Figure 6 This illustrates another flowchart of the rolling control method in an embodiment of this application, which specifically includes:

[0127] Step 601: Obtain strip change information between the first strip and the second strip.

[0128] The first strip and the second strip are two adjacent strips welded together during the strip production process.

[0129] Step 602: Determine whether the width change in the strip change information is zero.

[0130] If yes, proceed to step 603; otherwise, proceed to step 604.

[0131] Step 603: If the thickness or steel grade between the first strip and the second strip changes based on the strip change information, adjust the cutting depth of the crescent shears to the first target depth.

[0132] Step 604: Determine whether the width change in the strip change information is greater than the preset first width threshold.

[0133] If yes, proceed to step 605; otherwise, proceed to step 606.

[0134] Step 605: Determine the corresponding second target depth based on the width change, and adjust the cutting depth of the crescent shears to the second target depth.

[0135] Among them, the depth of the second target is positively correlated with the change in width, and the depth of the second target is greater than the depth of the first target.

[0136] Step 606: Adjust the cutting depth of the crescent shears used to cut the strip at both ends of the weld to a preset first target depth.

[0137] Step 607: Determine the corresponding target rolling speed from the preset rolling speed range based on the width change.

[0138] Among them, the target rolling speed is inversely correlated with the width change.

[0139] Step 608: Determine the corresponding range of increase based on the change in width.

[0140] Among them, the range of increase is positively correlated with the change in width.

[0141] Step 609: Based on the amplification range and the pre-tension and bending roll force of each stand when the first strip passes through the rolling mill, determine the pre-tension and bending roll force of each stand before the shearing zone passes through the rolling mill.

[0142] Step 610: Based on the range of increase and the bending roll force of each stand when the second strip passes through the rolling mill, determine the bending roll force of each stand when the shearing zone passes through the rolling mill.

[0143] Step 611: Determine the bending roll force of each stand after the shearing zone passes through the rolling mill based on the bending roll force of each stand when the second strip passes through the rolling mill.

[0144] Step 612: When the width change is greater than the second width threshold, determine the rolling force of each stand when the shearing zone passes through the rolling mill based on the preset reduction range and the rolling force of each stand when the first strip passes through the rolling mill.

[0145] The second width threshold is greater than the first width threshold.

[0146] Step 613: The target rolling speed, the pre-tension and bending roll force of each stand before the shearing zone passes through the rolling mill, the bending roll force of each stand when the shearing zone passes through the rolling mill, the bending roll force of each stand after the shearing zone passes through the rolling mill, and the rolling force of each stand when the shearing zone passes through the rolling mill are sent to the rolling mill to control the rolling mill to roll the sheared first strip and second strip.

[0147] In this application, by determining the strip steel variation information during the strip steel production process, the shearing depth of the crescent shear is dynamically adjusted to avoid wavy defects caused by sudden changes in the width of the shearing area. In turn, the rolling parameters of the rolling mill are dynamically adjusted to compensate for the fluctuations caused by the strip steel variation as much as possible, thereby precisely controlling the strip steel rolling process and ensuring the continuity and stability of the entire rolling process.

[0148] The following describes an apparatus embodiment of this application, which can be used to execute the rolling control method 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 rolling control method described above.

[0149] See Figure 7 The diagram shows a block diagram of the rolling control device 700 in an embodiment of this application, which specifically includes:

[0150] The information acquisition module 701 is used to acquire strip change information between the first strip and the second strip; wherein the first strip and the second strip are two adjacent strips welded before and after each other during the strip production process;

[0151] The strip shearing module 702 is used to adjust the shearing depth of the crescent shears used to shear the strip at both ends of the weld according to the strip change information.

[0152] The rolling control module 703 is used to determine the amount of change in rolling parameters based on the strip change information, and send the amount of change in rolling parameters to the rolling mill to control the rolling mill to roll the sheared first strip and second strip.

[0153] In an exemplary embodiment, the strip shearing module 702 described above includes:

[0154] The first shearing unit is used to adjust the shearing depth of the crescent shears used to shear the strip at both ends of the weld to a preset first target depth when the width change in the strip change information is not greater than a preset first width threshold.

[0155] The second shearing unit is used to determine the corresponding second target depth based on the width change when the width change is greater than the first width threshold, and adjust the shearing depth of the crescent shears to the second target depth; wherein the second target depth is positively correlated with the width change and the second target depth is greater than the first target depth.

[0156] In an exemplary embodiment, the strip shearing module 702 described above further includes:

[0157] The specification judgment unit is used to determine whether the thickness or steel grade between the first strip and the second strip has changed when the width change is zero, based on the strip change information.

[0158] The third shearing unit is used to adjust the shearing depth of the crescent shears to the first target depth when the thickness or steel grade between the first strip and the second strip changes.

[0159] In an exemplary embodiment, the rolling control module 703 described above includes:

[0160] The speed determination unit is used to determine the corresponding target rolling speed from a preset rolling speed range based on the width change; wherein the target rolling speed is inversely correlated with the width change.

[0161] The speed sending unit is used to send the target rolling speed to the rolling mill to control the rolling mill to roll the shearing zone based on the target rolling speed.

[0162] In an exemplary embodiment, the rolling parameter variation includes a first rolling parameter, which includes the pre-tension and the bending roll force. The rolling control module 703 further includes:

[0163] The amplification range determination unit is used to determine the corresponding amplification range based on the width change; wherein, the amplification range is positively correlated with the width change.

[0164] The first parameter determination unit is used to determine the first rolling parameters of each stand before the shearing zone passes through the rolling mill, the first rolling parameters of each stand when the first strip passes through the rolling mill, and the first rolling parameters of each stand when the second strip passes through the rolling mill, based on the increase range, the first rolling parameters of each stand when the shearing zone passes through the rolling mill, and the first rolling parameters of each stand after the shearing zone passes through the rolling mill.

[0165] In an exemplary embodiment, the first parameter determining unit includes:

[0166] The first parameter determination subunit is used to determine the first rolling parameters of each stand before the shearing zone passes through the rolling mill, based on the increase range and the first rolling parameters of each stand when the first strip passes through the rolling mill.

[0167] The second parameter determination subunit is used to determine the first rolling parameters of each stand when the shearing zone passes through the rolling mill, based on the increase range and the first rolling parameters of each stand when the second strip passes through the rolling mill.

[0168] The third parameter determination subunit is used to determine the first rolling parameters of each stand after the shearing zone passes through the rolling mill, based on the first rolling parameters of each stand when the second strip passes through the rolling mill.

[0169] In an exemplary embodiment, the rolling parameter variation further includes a second rolling parameter, which includes rolling force. The rolling control module 703 further includes:

[0170] The second parameter determination unit is used to determine the second rolling parameters of each stand when the shearing zone passes through the rolling mill, based on a preset reduction range and the second rolling parameters of each stand when the first strip passes through the rolling mill, when the width change is greater than the second width threshold; wherein the second width threshold is greater than the first width threshold.

[0171] Based on the same inventive concept, embodiments of this application provide a computer-readable storage medium storing computer program instructions. When the computer program instructions are loaded and executed by a processor, they implement the steps of the rolling control method described above.

[0172] Based on the same inventive concept, this application provides an electronic device, see [link to relevant documentation]. Figure 8 The diagram shows a schematic of the structure of an electronic device in an embodiment of this application. The electronic device includes one or more memories 804, one or more processors 802, and at least one computer program stored in the memory 804 and executable on the processor 802. When the processor 802 executes the computer program, it implements the steps of the rolling control method described above.

[0173] The bus architecture (represented by bus 800) includes any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 802 and memory represented by memory 804. Bus 800 can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 805 provides an interface between bus 800 and receiver 801 and transmitter 803. Receiver 801 and transmitter 803 can be the same element, a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 802 is responsible for managing bus 800 and general processing, while memory 804 can be used to store data used by processor 802 during operation.

[0174] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0175] Based on the same inventive concept, this application provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the rolling control method described above.

[0176] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0177] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0178] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing computer program instructions, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0179] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A rolling control method, characterized in that, The method includes: Obtain information on the changes in strip steel between the first strip steel and the second strip steel; wherein the first strip steel and the second strip steel are two adjacent strip steels welded together during the strip steel production process; Based on the strip change information, adjust the cutting depth of the crescent shears used to cut the strip at both ends of the weld. Based on the strip change information, the amount of change in rolling parameters is determined, and the amount of change in rolling parameters is sent to the rolling mill to control the rolling mill to roll the sheared first strip and second strip.

2. The method according to claim 1, characterized in that, The step of adjusting the cutting depth of the crescent shears used to cut the strip at both ends of the weld seam based on the strip change information includes: If the width change in the strip change information is not greater than the preset first width threshold, then the cutting depth of the crescent shears used to cut the strip at both ends of the weld will be adjusted to the preset first target depth. If the width change is greater than the first width threshold, a second target depth is determined based on the width change, and the cutting depth of the crescent shears is adjusted to the second target depth; wherein the second target depth is positively correlated with the width change, and the second target depth is greater than the first target depth.

3. The method according to claim 2, characterized in that, The step of adjusting the cutting depth of the crescent shears used to cut the strip at both ends of the weld seam based on the strip change information further includes: If the width change is zero, then based on the strip change information, it is determined whether the thickness or steel grade between the first strip and the second strip has changed; If so, the cutting depth of the crescent-shaped scissors is adjusted to the first target depth.

4. The method according to claim 2, characterized in that, The step of determining the change in rolling parameters based on the strip change information and sending the change in rolling parameters to the rolling mill to control the rolling mill to roll the sheared first and second strips includes: Based on the width change, a corresponding target rolling speed is determined from a preset rolling speed range; wherein the target rolling speed is inversely correlated with the width change. The target rolling speed is sent to the rolling mill to control the rolling mill to roll the shearing zone based on the target rolling speed.

5. The method according to claim 2, characterized in that, The change in rolling parameters includes a first rolling parameter, which includes the pre-tension and bending roll force; determining the change in rolling parameters based on the strip change information includes: The corresponding increase range is determined based on the width change; wherein the increase range is positively correlated with the width change. Based on the range of increases, the first rolling parameters of each stand when the first strip passes through the rolling mill, and the first rolling parameters of each stand when the second strip passes through the rolling mill, determine the first rolling parameters of each stand before the shearing zone passes through the rolling mill, the first rolling parameters of each stand when the shearing zone passes through the rolling mill, and the first rolling parameters of each stand after the shearing zone passes through the rolling mill.

6. The method according to claim 5, characterized in that, The determination of the first rolling parameters of each stand before the shearing zone passes through the rolling mill, the first rolling parameters of each stand when the first strip passes through the rolling mill, and the first rolling parameters of each stand when the second strip passes through the rolling mill, based on the aforementioned range of increase, includes: Based on the aforementioned range of increase and the first rolling parameters of each stand when the first strip passes through the rolling mill, the first rolling parameters of each stand before the shearing zone passes through the rolling mill are determined. Based on the aforementioned increase range and the first rolling parameters of each stand when the second strip passes through the rolling mill, the first rolling parameters of each stand when the shearing zone passes through the rolling mill are determined. Based on the first rolling parameters of each stand when the second strip passes through the rolling mill, the first rolling parameters of each stand after the shearing zone passes through the rolling mill are determined.

7. The method according to claim 5, characterized in that, The change in rolling parameters further includes a second rolling parameter, which includes rolling force; determining the change in rolling parameters based on the strip change information further includes: If the width change is greater than the second width threshold, then the second rolling parameters of each stand when the shearing zone passes through the rolling mill are determined according to the preset reduction range and the second rolling parameters of each stand when the first strip passes through the rolling mill; wherein, the second width threshold is greater than the first width threshold.

8. A rolling control device, characterized in that, The device includes: The information acquisition module is used to acquire strip change information between the first strip and the second strip; wherein the first strip and the second strip are two adjacent strips welded together during the strip production process; The strip shearing module is used to adjust the shearing depth of the crescent shears used to shear the strip at both ends of the weld according to the strip change information. The rolling control module is used to determine the amount of change in rolling parameters based on the strip change information, and send the amount of change in rolling parameters to the rolling mill to control the rolling mill to roll the sheared first strip and second strip.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions that, when loaded and executed by a processor, implement the steps of the method as described in any one of claims 1 to 7.

10. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and when the processor executes the computer program, it implements the steps of the method as described in any one of claims 1 to 7.

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