Cold rolling mill control method and strip processing system

Abstract

The application discloses a cold rolling mill control method and a strip processing system. The cold rolling mill control method comprises the following steps: obtaining an initial flatness of an initial strip profile curve of an initial strip rolled by a cold rolling mill; calculating a flatness compensation value according to a real-time winding diameter of the strip on a winding shaft of a coiler; calculating a required flatness based on the initial flatness and the flatness compensation value; adjusting the flatness at a preset line segment of the initial strip profile curve to the required flatness to obtain a real-time strip profile curve of a compensation strip required to be rolled by the cold rolling mill. The cold rolling mill control method according to the embodiment of the application can adjust the flatness of the strip processed by the cold rolling mill according to the change of the winding diameter of the strip on the winding shaft of the coiler, make the change speed of the winding diameter of the strip on the coiler in the axial direction of the winding shaft be the same or similar, thereby ensuring that the strip is uniformly stressed, preventing the tearing of the strip, and having the advantages of good flatness of the strip.

Description

Technical Field

[0001] This invention relates to the field of metal processing, and in particular to a cold rolling mill control method and a strip processing system. Background Technology

[0002] In related technologies, metal strip processing systems typically include cold rolling mills and coilers. Cold rolling mills are used to process strips, and the coilers' reels are used to coil the strips processed by the cold rolling mills. However, during the coiling process, there is a problem that the tension of the strips on the reel is not uniform along the axial direction of the reel. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems of inconsistent strip tension along the axial direction of the coil on a coiler. To this end, one objective of this invention is to provide a cold rolling mill control method that can adjust the straightness of the strip processed by the cold rolling mill according to the change in strip diameter on the coiler's coil, ensuring that the rate of change in strip diameter along the axial direction of the coil is the same or similar, thereby guaranteeing uniform stress on the strip, preventing tearing, and providing advantages such as good strip straightness.

[0004] To achieve the above objectives, a cold rolling mill control method is proposed according to a first aspect of the present invention, comprising: obtaining the initial straightness of the initial flatness of the initial strip profile curve of the initial strip rolled by the cold rolling mill; calculating a flatness compensation value based on the real-time coil diameter of the strip on the coiler; calculating a required flatness based on the initial flatness and the flatness compensation value; adjusting the flatness at a preset segment of the initial strip profile curve to the required flatness, thereby obtaining the real-time flatness curve of the compensated strip to be rolled by the cold rolling mill.

[0005] According to the first aspect of the present invention, the cold rolling mill control method can adjust the straightness of the strip processed by the cold rolling mill according to the change of the strip diameter on the coiler's reel, and make the change rate of the strip diameter on the coiler on the reel axis the same or similar, thereby ensuring uniform stress on the strip, preventing tearing, and having the advantages of good strip straightness.

[0006] According to some embodiments of the present invention, the step of calculating the flatness compensation value based on the real-time roll diameter of the strip on the winding machine's reel includes: obtaining the initial roll diameter of the strip on the reel, the thickness of the strip, and the rotational speed of the reel; and calculating the real-time roll diameter of the strip on the reel based on the initial roll diameter of the strip on the reel, the thickness of the strip, and the rotational speed of the reel.

[0007] According to some embodiments of the present invention, the step of calculating the flatness compensation value based on the real-time roll diameter of the strip on the winding machine's roll includes: calculating the flatness compensation value based on the real-time roll diameter of the strip on the roll and the thickness of the strip.

[0008] According to some embodiments of the present invention, the step of calculating the flatness compensation value based on the real-time roll diameter of the strip on the winding machine and the thickness of the strip includes: obtaining a first compensation parameter based on the real-time roll diameter of the strip on the winding machine; obtaining a second compensation parameter based on the thickness of the strip; obtaining a preset compensation parameter; and the flatness compensation value is the product of the first compensation parameter, the second compensation parameter and the preset compensation parameter.

[0009] According to some embodiments of the present invention, the real-time roll diameter of the strip on the roll of the winding machine is positively correlated with the first compensation parameter.

[0010] According to some embodiments of the present invention, the thickness of the strip is negatively correlated with the second compensation parameter.

[0011] According to some embodiments of the present invention, when the real-time roll diameter of the strip on the spool is less than a preset roll diameter, the first compensation parameter is a negative number, and when the real-time roll diameter of the strip on the spool is not less than the preset roll diameter, the first compensation parameter is not less than zero.

[0012] According to some embodiments of the present invention, the real-time plate shape curve has a center line in its length direction, and the real-time plate shape curve is symmetrically arranged about the center line; wherein, the real-time plate shape curve is constructed such that its center in its length direction protrudes relative to its two ends.

[0013] According to some embodiments of the present invention, the center line passes through the preset line segment, the preset line segment is symmetrically arranged about the center line, and the ratio of the length of the preset line segment to the length of the real-time plate curve is 1 / 2.

[0014] According to a second aspect of the present invention, a strip processing system is provided, which applies the cold rolling mill control method according to a first aspect of the present invention, comprising: a cold rolling mill for processing strip; a coiler having a coil for coiling the strip processed by the cold rolling mill; and a controller for acquiring the initial straightness of the initial flatness of the initial strip profile curve rolled by the cold rolling mill, calculating a flatness compensation value based on the real-time coil diameter of the strip on the coiler, calculating a required flatness based on the initial flatness and the flatness compensation value, adjusting the flatness at a preset segment of the initial flatness curve to the required flatness, and obtaining the real-time flatness curve of the compensated strip to be rolled by the cold rolling mill.

[0015] According to a second aspect of the present invention, the strip processing system can adjust the straightness of the strip processed by the cold rolling mill according to the change in the strip diameter on the coiler's reel, and make the change rate of the strip diameter on the coiler on the reel axis the same or similar, thereby ensuring uniform stress on the strip, preventing tearing, and having the advantages of good strip straightness.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the strip on the winding machine in the prior art.

[0019] Figure 2 This is a flowchart of a cold rolling mill control method according to an embodiment of the present invention.

[0020] Figure 3 This is a flowchart of a cold rolling mill control method according to another embodiment of the present invention.

[0021] Figure 4 This is a flowchart illustrating the calculation of the flatness compensation value in the cold rolling mill control method according to an embodiment of the present invention.

[0022] Figure 5 This is a table showing the real-time roll diameter and first compensation parameter correspondence of the strip on the roll in the cold rolling mill control method according to an embodiment of the present invention.

[0023] Figure 6 This is a table showing the correspondence between strip thickness and second compensation parameters in the cold rolling mill control method according to an embodiment of the present invention. Detailed Implementation

[0024] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] In the description of this invention, "a plurality of" means two or more.

[0027] like Figure 1 As shown, the inventors discovered that the rate of change of the strip diameter 1 along the axial direction of the coiler's spool 2 is not uniform, exhibiting a trend of faster diameter increase in the middle region and slower increase in diameter at both ends. This results in a continuous increase in the convexity of the strip 1 on the spool 2, leading to a looser strip 1 arrangement in the middle region and a tighter strip 1 arrangement at both ends. Consequently, the strip 1 experiences uneven stress during winding, posing a risk of tearing at the ends and causing wavy wrinkles to easily form in the middle region, affecting the straightness of the strip 1. Based on this, this application provides a cold rolling mill control method. This method can adjust the straightness of the strip processed by the cold rolling mill according to the change in the strip diameter on the coiler's spool, ensuring that the rate of change of the strip diameter along the axial direction of the spool is the same or similar, improving the uniformity of stress on the strip and preventing tearing.

[0028] The following describes a cold rolling mill control method according to an embodiment of the present invention with reference to the accompanying drawings.

[0029] like Figures 2-4 As shown, the cold rolling mill control method according to an embodiment of the present invention includes:

[0030] Step S1: Obtain the initial straightness of the initial strip profile curve of the initial strip rolled by the cold rolling mill;

[0031] Step S2: Calculate the flatness compensation value based on the real-time roll diameter of the strip on the winding machine's roll.

[0032] Step S3: Calculate the required straightness based on the initial straightness and the straightness compensation value;

[0033] Step S4: Adjust the straightness of the preset line segment of the initial strip profile curve to the required straightness to obtain the real-time strip profile curve of the compensation strip to be rolled by the cold rolling mill.

[0034] It should be noted that the real-time roll diameter of the strip on the coiler refers to the maximum roll diameter of the strip on the coiler at the current moment.

[0035] According to the cold rolling mill control method of the present invention, an initial strip profile curve with initial straightness is input into the cold rolling mill, and the cold rolling mill processes the strip according to the initial strip profile curve so that the curve shape of the cross section of the processed strip conforms to the initial strip profile curve, and the coiler's coiling shaft coils the strip processed by the cold rolling mill.

[0036] In addition, the flatness compensation value is calculated based on the real-time coil diameter of the strip on the coiler. That is, as the maximum coil diameter of the strip on the coiler changes, the flatness compensation value is continuously calculated. Based on the initial flatness and the flatness compensation value, the required flatness can be obtained. The flatness of the preset line segment of the initial strip profile curve is adjusted to the required flatness to obtain the real-time strip profile curve. The cross-sectional curve shape of the compensated strip processed by the cold rolling mill needs to conform to the adjusted real-time strip profile curve.

[0037] In other words, as the real-time roll diameter of the strip on the coiler changes, the cold rolling mill produces strips with cross-sectional shapes of different curves. In this way, the compensating strip can suppress the change in the convexity of the strip on the coiler by its own change in straightness, so that the roll diameter change rate of the strip on the coiler is the same or similar in the axial direction. This avoids that the difference in the roll diameter change rate of the strip on the axial direction of the coil is too large. During the coiling process, the strip is subjected to more uniform stress, the strip is less prone to tearing, and has fewer wrinkles and better straightness, thereby improving the usability and formability of the strip.

[0038] It should be noted that the preset line segment of the initial plate shape curve refers to a part of the initial plate shape curve in the extension direction of the initial plate shape curve. In this case, the straightness of the preset line segment of the initial plate shape curve is adjusted to the required straightness, and the straightness of the rest of the initial plate shape curve does not need to be adjusted. Alternatively, the preset line segment can be the entire initial plate shape curve, and the straightness of each part of the initial plate shape curve is adjusted to the required straightness.

[0039] Thus, the cold rolling mill control method according to the present invention can adjust the straightness of the strip processed by the cold rolling mill according to the change of the strip diameter on the coiler's reel, and make the difference in the rate of change of the strip diameter on the coiler in the axial direction of the reel the same or similar, thereby ensuring uniform stress on the strip, preventing tearing, and having the advantages of good strip straightness.

[0040] Specifically, in this embodiment of the invention, the strip can be an aluminum alloy, such as 3104 aluminum alloy. This strip belongs to the Al-Mn-Mg series of rust-resistant aluminum alloys, characterized by high strength, high toughness, strong corrosion resistance, and good deep-drawing formability. It is widely used in packaging, transportation, and the production of beverage cans. Alternatively, the strip can be 182 aluminum alloy, which belongs to the Al-Mg series of aluminum alloys and also features high strength, high toughness, and strong corrosion resistance. It is also widely used in packaging, transportation, and the production of beverage can lids.

[0041] In this embodiment of the invention, the strip production process may include: smelting → casting → milling → homogenization heat treatment → hot rough rolling → hot finish rolling → cold rolling → finishing → packaging.

[0042] When the strip is made of 3104 aluminum alloy, the percentage content of alloying elements is as follows: Si: 0.24%, Fe: 0.45%, Cu: 0.18%, Mn: 0.90%, Mg: 1.24%, other elements individually ≤0.05%, total ≤0.15%, and the remainder is Al.

[0043] When the strip is made of 5182 aluminum alloy, the percentage content of alloying elements is as follows: Si: 0.08%, Fe: 0.31%, Cu: 0.09%, Mn: 0.36%, Mg: 4.9%, other elements individually ≤0.05%, total ≤0.15%, and the remainder is Al.

[0044] When the strip is 3104 aluminum alloy, the production steps of the strip include: hot rolling and sawing the head and tail of the 3104 alloy, milling and then loading it into a heating furnace for homogenization heat treatment. The homogenization heat treatment process includes: heat treatment at 600℃ for 2-3 hours, followed by heat treatment at 540℃-555℃ for 1 hour.

[0045] When the strip is made of 5182 aluminum alloy, the strip production steps include: hot rolling and sawing the head and tail of the 5182 aluminum alloy, milling and then loading it into a heating furnace for homogenization heat treatment. The homogenization heat treatment process includes: heat treatment at 410℃ for 3-5 hours, followed by heat treatment at 490℃ for 2 hours.

[0046] Specifically, the thickness of the hot-rolled 3104 alloy is controlled between 2.1 mm and 2.2 mm, and the hot-rolling coiling temperature is increased to achieve a hot finish rolling temperature of 335℃ to 345℃; the thickness of the hot-rolled 5182 alloy is controlled between 2.5 mm and 3.0 mm, and the hot-rolling coiling temperature is increased to achieve a hot finish rolling temperature of 335℃ to 345℃. This increases the proportion of cubic texture in the material, improves its formability, and reduces its room-temperature mechanical properties.

[0047] The cold rolling mill control method of this application is used to control the cold rolling mill during the production process of strip. For example, it can be used in the production process of can lids, pull rings and can body materials.

[0048] When the strip is made of 3104 aluminum alloy, the cold rolling production steps include: cold rolling three-stage 3104 alloy, rolling the strip thickness to 0.240mm~0.270mm, speed 11000m / min~1150m / min, and finished product exit temperature ≥135℃.

[0049] When the strip is 5182 aluminum alloy, the cold rolling production steps include: single-stand cold rolling of 5182 alloy, rolling the strip thickness to 0.203mm~0.222mm, speed 800m / min~1000m / min, and finished product exit temperature ≥100℃.

[0050] According to some specific embodiments of the present invention, such as Figures 2-4 As shown, step S2: Calculate the flatness compensation value based on the real-time roll diameter of the strip on the winding machine's roll, including:

[0051] Step S21: Obtain the initial roll diameter, strip thickness, and roll rotation speed of the strip on the roll;

[0052] Step S22: Calculate the real-time roll diameter of the strip on the roll based on the initial roll diameter, the thickness of the strip, and the rotation speed of the roll.

[0053] It should be noted that when there is no strip on the coiler's reel, the initial coil diameter of the strip on the coiler is the outer diameter of the coiler's reel.

[0054] Compared to detecting the real-time roll diameter of the strip on the coiler's roll using additional sensors and other instruments, calculating the real-time roll diameter of the strip on the roll using three parameters—the initial roll diameter, the strip thickness, and the roll rotation speed—avoids the influence of the measurement accuracy of sensors and other instruments on the measurement results of the real-time roll diameter of the strip on the roll. It also avoids measurement errors caused by potential shaking of the coiler or other equipment during the strip processing and production process. According to the cold rolling mill control method of this embodiment, the obtained real-time roll diameter of the strip on the roll is more accurate, more effectively ensuring uniform stress on the strip, preventing tearing, and maintaining good strip straightness.

[0055] When the strip is 3104 aluminum alloy, the winding speed can be 11000m / min to 1150m / min, and when the strip is 5182 aluminum alloy, the winding speed can be 800m / min to 1000m / min.

[0056] According to some specific embodiments of the present invention, such as Figures 2-4 As shown, step S2: Calculate the flatness compensation value based on the real-time roll diameter of the strip on the winding machine's roll, including:

[0057] Step S23: Calculate the flatness compensation value based on the real-time roll diameter and thickness of the strip on the winding machine.

[0058] Typically, during a single processing cycle, the thickness of the strip after cold rolling remains constant. Therefore, the flatness compensation value varies with the real-time roll diameter of the strip on the coil, and the strip thickness also changes. However, the change in strip thickness affects the strip's deformation capacity, thus impacting the strip's ability to suppress changes in the strip's convexity on the coil when the real-time roll diameter is the same. Therefore, the real-time roll diameter and strip thickness on the coil are combined to calculate the flatness compensation value. In this way, the strip processed according to the calibration profile curve adjusted according to the required flatness can more effectively suppress the convexity of the strip on the coiler, thereby ensuring uniform stress on the strip, preventing tearing, and achieving good strip flatness.

[0059] According to some specific embodiments of the present invention, such as Figures 2-4 As shown, step S23: Calculate the flatness compensation value based on the real-time roll diameter and thickness of the strip on the winding machine's roll, including:

[0060] Step S231: Obtain the first compensation parameter based on the real-time roll diameter of the strip on the roll;

[0061] Step S232: Obtain the second compensation parameter based on the thickness of the strip;

[0062] Step S233: Obtain preset compensation parameters;

[0063] Step S234: The flatness compensation value is the product of the first compensation parameter, the second compensation parameter, and the preset compensation parameter.

[0064] The preset compensation parameter can be 60% to 70%, for example, the preset compensation parameter can be 65%.

[0065] In this way, the real-time roll diameter of the strip on the roll within a certain range can correspond to a first compensation parameter, and the thickness of the strip within a certain range can correspond to a second compensation parameter. The calculation method of the flatness compensation value is simpler, which can avoid excessive changes in the real-time strip profile curve. The control of the cold rolling mill can be simplified accordingly, and the processing accuracy of the strip can be increased accordingly.

[0066] like Figure 5As shown in the figure, the table corresponds to the real-time roll diameter of the strip on the reel and the first compensation parameter. When the real-time roll diameter of the strip on the reel is not less than 665mm and less than 900mm, the first compensation parameter is -0.3; when the real-time roll diameter of the strip on the reel is not less than 900mm and less than 1200mm, the first compensation parameter is -0.2; when the real-time roll diameter of the strip on the reel is not less than 1200mm and less than 1700mm, the first compensation parameter is 0.15. When the real-time roll diameter of the upper strip is not less than 1700mm and less than 1900mm, the first compensation parameter is set to 0.4; when the real-time roll diameter of the upper strip is not less than 1900mm and less than 2100mm, the first compensation parameter is set to 0.75; when the real-time roll diameter of the upper strip is not less than 2100mm and less than 2300mm, the first compensation parameter is set to 0.86; when the real-time roll diameter of the upper strip is not less than 2300mm, the first compensation parameter is set to 0.92.

[0067] like Figure 6 As shown in the figure, the table corresponds to the strip thickness and the second compensation parameter. When the strip thickness is not less than 0.15mm and less than 0.3mm, the second compensation parameter is 1; when the strip thickness is not less than 0.3mm and less than 0.5mm, the second compensation parameter is 0.8; when the strip thickness is not less than 0.5mm and less than 0.8mm, the second compensation parameter is 0.75; when the strip thickness is not less than 0.8mm and less than 1.5mm, the second compensation parameter is 0.6; and when the strip thickness is not less than 1.5mm, the second compensation parameter is 0.5.

[0068] According to some specific embodiments of the present invention, the real-time roll diameter of the strip on the winding machine's roll is positively correlated with the first compensation parameter. Thus, as the real-time roll diameter of the strip on the roll increases, the adjustment range of the real-time strip profile curve becomes larger, ensuring that the convexity of the strip on the winding machine's roll does not increase excessively, thereby ensuring uniform stress on the strip, preventing tearing, and maintaining good strip straightness.

[0069] According to some specific embodiments of the present invention, there is a negative correlation between the thickness of the strip and the second compensation parameter. Since a thicker strip is less prone to deformation, when the strip diameter on the winding machine's reel is the same, a thicker strip results in a more similar rate of change in the strip diameter along the axial direction of the reel. Therefore, when the strip thickness is relatively large, the adjustment range required for the preset segment of the real-time strip profile curve is smaller, thus resulting in a negative correlation between the strip thickness and the second compensation parameter.

[0070] According to some specific embodiments of the present invention, when the real-time roll diameter of the strip on the roll is less than the preset roll diameter, the first compensation parameter is negative; when the real-time roll diameter of the strip on the roll is not less than the preset roll diameter, the first compensation parameter is not less than zero.

[0071] The inventors discovered that during the strip winding process of the winding machine, if the strip diameter on the roll is smaller than the preset roll diameter, the middle area will be tightly arranged while the ends will be loosely arranged. In this case, wrinkles are likely to appear at the ends of the strip, affecting the flatness. Therefore, the first compensation parameter needs to be set to a negative number. At this time, the straightness of the preset line segment of the real-time strip profile curve needs to be reduced to ensure the flatness of the strip. If the strip diameter on the roll of the winding machine is not less than the preset roll diameter, the middle area will be loosely arranged while the ends will be tightly arranged. In this case, wrinkles are likely to appear in the middle of the strip, affecting the flatness. Therefore, the first compensation parameter needs to be not less than zero. At this time, the straightness of the preset line segment of the real-time strip profile curve needs to be increased or the straightness of the preset line segment of the initial strip profile curve needs to be maintained at the initial straightness to ensure the flatness of the strip.

[0072] For example, the preset roll diameter can be any value between 900mm and 1200mm. When the real-time roll diameter of the strip on the winding machine is 900mm, the first compensation parameter can be -0.2. When the real-time roll diameter of the strip on the winding machine is 1200mm, the first compensation parameter can be 0.15.

[0073] According to some specific embodiments of the present invention, step S3: calculating the required flatness based on the initial flatness and the flatness compensation value, including: the required flatness is the sum of the initial flatness and the flatness compensation value. In this way, the required flatness can be obtained by superimposing the initial flatness and the flatness compensation value, which simplifies the calculation, does not consume too much computing power, ensures the overall smoothness of the strip processing system control, and can reduce costs.

[0074] According to some specific embodiments of the present invention, the real-time strip profile curve has a centerline in its length direction and is symmetrically arranged about the centerline. The real-time strip profile curve is constructed such that its center in the length direction protrudes relative to its two ends. Since the strip is approximately symmetrical about its width direction centerline on the winding machine's spool, constructing the real-time strip profile curve with its center protruding relative to its two ends better avoids excessive convexity of the strip on the winding machine's spool, ensuring uniform stress distribution on the strip.

[0075] According to some specific embodiments of the present invention, the preset line segment is symmetrically arranged about the center line of the real-time strip profile curve, and the ratio of the length of the preset line segment to the length of the real-time strip profile curve is 1 / 2. Because the preset line segment is symmetrically arranged about the center line of the real-time strip profile curve, the overall straightness of the strip is more uniform after adjustment. Furthermore, the preset line segment can be the middle part of the real-time strip profile curve, or it can be the edge part. If the preset line segment is the edge part of the real-time strip profile curve, then the preset line segment is divided into two parts, and the length of the preset line segment in each part is 1 / 4 of the length of the real-time strip profile curve.

[0076] According to some specific embodiments of the present invention, the center line of the real-time strip profile curve passes through a preset line segment, that is, the preset line segment is located in the middle part of the strip in the width direction of the strip. In this way, compared with setting the preset line segment at the edge of the strip, the stress on the strip is more uniform after adjustment.

[0077] The strip processing system according to an embodiment of the present invention is described below with reference to the accompanying drawings. The system is controlled using the cold rolling mill control method described above. The strip processing system includes a cold rolling mill, a coiler, and a controller. The cold rolling mill is used to process strip. The coiler has a coil for coiling the strip processed by the cold rolling mill. The controller is used to obtain the initial straightness of the initial flatness curve of the initial strip rolled by the cold rolling mill, and calculates a flatness compensation value based on the real-time coil diameter and thickness of the strip on the coiler. Based on the initial flatness and the flatness compensation value, the required flatness is calculated, and the flatness at a preset segment of the initial flatness curve is adjusted to the required flatness. This obtains the real-time flatness curve of the compensated strip to be rolled by the cold rolling mill, and the cold rolling mill then processes the strip according to the real-time flatness curve.

[0078] According to the strip processing system of the present invention, the flatness of the strip processed by the cold rolling mill is adjusted according to the real-time change of the strip diameter on the coiler's reel. The change rate of the strip diameter on the coiler is the same or similar along the axial direction of the reel, thereby ensuring uniform stress on the strip, preventing tearing, and having the advantages of good strip flatness.

[0079] Other components and operations of the cold rolling mill control method and strip processing system according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0080] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0081] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cold rolling mill control method, characterized in that, include: Obtain the initial straightness of the initial strip profile curve of the initial strip rolled by the cold rolling mill; Calculate the flatness compensation value based on the real-time roll diameter of the strip on the coiler's roll. Based on the initial flatness and the flatness compensation value, calculate the required flatness; The flatness at the preset line segment of the initial strip profile curve is adjusted to the required flatness to obtain the real-time strip profile curve of the compensation strip to be rolled by the cold rolling mill. The calculation of the flatness compensation value based on the real-time roll diameter of the strip on the winding machine's roll includes: The flatness compensation value is calculated based on the real-time roll diameter and thickness of the strip on the roll. The step of calculating the flatness compensation value based on the real-time roll diameter and thickness of the strip on the winding machine's roll includes: The first compensation parameter is obtained based on the real-time roll diameter of the strip on the roll. The second compensation parameter is obtained based on the thickness of the strip. Obtain the preset compensation parameters; The flatness compensation value is the product of the first compensation parameter, the second compensation parameter, and the preset compensation parameter. Wherein, when the real-time roll diameter of the strip on the spool is less than the preset roll diameter, the first compensation parameter is a negative number, and when the real-time roll diameter of the strip on the spool is not less than the preset roll diameter, the first compensation parameter is not less than zero.

2. The cold rolling mill control method according to claim 1, characterized in that, The step of calculating the flatness compensation value based on the real-time roll diameter of the strip on the winding machine's roll includes: Obtain the initial roll diameter of the strip on the roll, the thickness of the strip, and the rotational speed of the roll; The real-time roll diameter of the strip on the reel is calculated based on the initial roll diameter, the thickness of the strip, and the rotational speed of the reel.

3. The cold rolling mill control method according to claim 1, characterized in that, The real-time roll diameter of the strip on the winding machine's roll is positively correlated with the first compensation parameter.

4. The cold rolling mill control method according to claim 1, characterized in that, The thickness of the strip is negatively correlated with the second compensation parameter.

5. The cold rolling mill control method according to claim 1, characterized in that, The real-time plate shape curve has a centerline in its length direction, and the real-time plate shape curve is symmetrically arranged about the centerline; The real-time plate-shaped curve is constructed such that its center in the length direction protrudes relative to its two ends.

6. The cold rolling mill control method according to claim 5, characterized in that, The centerline passes through the preset line segment, which is symmetrically arranged about the centerline. The length of the preset line segment is 1 / 2 the length of the real-time plate curve.

7. A strip processing system, employing the cold rolling mill control method according to any one of claims 1-6, characterized in that, include: Cold rolling mills are used to process strip materials; A coiler having a reel for coiling the strip processed by the cold rolling mill; The controller is used to acquire the initial straightness of the initial flatness of the initial strip profile curve rolled by the cold rolling mill, and calculate the flatness compensation value according to the real-time coil diameter of the strip on the coiler. Based on the initial flatness and the flatness compensation value, the controller calculates the required flatness, adjusts the flatness at the preset line segment of the initial flatness curve to the required flatness, and obtains the real-time flatness curve of the compensated strip to be rolled by the cold rolling mill.

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