Method of coiling aluminium alloy strip

Abstract

The application provides a winding method of aluminum alloy strip, comprising the following steps: adjusting the precision of the winding shaft of a stretch-bending straightener to a preset value; performing cooling treatment on the aluminum alloy strip to be straightened; performing straightening treatment on a part of the aluminum alloy strip to be straightened after the cooling treatment through the stretch-bending straightener; cutting the initial sample into multiple precision samples with the same size along the rolling direction and the vertical rolling direction in the width direction of the initial sample; detecting the transverse bending and the longitudinal bending of the multiple precision samples; calculating the initial winding tension of the winding shaft according to the yield strength parameter; and performing straightening and winding treatment on the aluminum alloy strip to be straightened. Compared with the prior art, the application can overcome the problem that the improvement of the aluminum alloy strip on the sticking defect in the speed-up stage is limited, and new quality hidden troubles such as indentation, bulge, oil stain, color difference, wrinkle and scratch are added, so that the winding sticking defect of the aluminum alloy strip produced by the stretch-bending straightener is greatly reduced or even eliminated.

Description

Technical Field

[0001] This invention relates to the field of aluminum processing technology, and in particular to a method for winding aluminum alloy strip. Background Technology

[0002] "Adhesion marks" are a common surface defect in aluminum and aluminum alloy strip production using tension straightening machines. These defects typically occur during the initial "winding and speed-up" phase and the final "speed-down" phase, and in severe cases, can even occur during the stable production phase. Essentially, they result from localized, minute areas of the aluminum alloy strip experiencing "dry friction" or even "pressure welding" due to close interlayer contact and misalignment, leading to surface damage. Many factors influence the "adhesion mark" defect, including the strength, shape, temperature, actual winding tension, and the precision of the winding shaft, making its prevention a significant challenge in this field.

[0003] In the existing technology, the methods to control the "sticking damage" during winding are: (1) Install a set of pressure rollers (also called ironing rollers or ironing pressure rollers) above the winding shaft of the bending straightening machine. During production, the pressure rollers are pressed on the tangential direction of the aluminum alloy strip winding to prevent the interlayer misalignment of the aluminum alloy strip. However, the disadvantage of this method is that it has a limited effect on improving the "sticking damage" defect in the speed-up section, and it is easy to cause aluminum powder on the surface of the aluminum alloy strip to fall off and adhere to the surface of the pressure roller, forming aluminum powder accumulation, which causes defects such as pits and scratches on the surface of the aluminum alloy strip. (2) Before winding, apply a film or pad paper to the surface of the aluminum alloy strip to avoid direct contact between the layers of the aluminum alloy strip, thereby eliminating the "sticking damage" defect. The drawback of this method is that it increases the production cost of the bending straightener and also leads to the need for additional paper or film removal processes during unwinding. In addition, if the paper is damp and absorbs water, it will cause oxidation and corrosion defects on the surface of the aluminum alloy strip. If the film contains impurities, it will cause pitting and scratches on the surface of the aluminum alloy strip. If the paper or film wrinkles, it will also cause color difference, wrinkling, bulging and other defects on the surface of the aluminum alloy strip. (3) Spray oil on the surface of the aluminum alloy strip before winding to increase oil film protection and reduce dry friction between layers of aluminum alloy strip, thereby improving the "sticking defects". The disadvantages of this method are that it is easy to cause fire, the irritating odor produced by oil volatilization will cause physical discomfort to the operator, and it is easy to cause surface oil stains and color difference defects on the aluminum alloy strip, and additional degreasing processes are required.

[0004] Therefore, a new method for winding aluminum alloy strip is urgently needed to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a method for winding aluminum alloy strip, which aims to improve the adhesion defects of aluminum and aluminum alloy strip, and solve problems such as dents, scratches, color difference, wrinkles, and bulges in aluminum and aluminum alloy strip.

[0006] This invention provides a method for winding aluminum alloy strip, the method comprising the following steps:

[0007] S1. Adjust the accuracy of the winding shaft of the bending straightening machine to the preset value;

[0008] S2. Before straightening the aluminum alloy strip to be straightened, the aluminum alloy strip to be straightened is cooled.

[0009] S3. A portion of the aluminum alloy strip to be straightened after cooling is straightened by the stretch straightening machine to obtain a first aluminum alloy strip, and a sample is taken from the first aluminum alloy strip to obtain an initial sample.

[0010] S4. Detect whether the initial sample meets the target value of plate shape wave. If so, cut the initial sample into multiple fine samples of the same size along the rolling direction and perpendicular to the rolling direction in the width direction.

[0011] S5. Detect the transverse and longitudinal bending of the multiple fine samples respectively, and determine whether the transverse and longitudinal bending of each fine sample meets the plate bending target value. If so, proceed to step S6.

[0012] S6. Perform mechanical property testing on the aluminum alloy strip to be straightened to obtain the corresponding yield strength parameter, and calculate the initial winding tension of the winding shaft based on the yield strength parameter;

[0013] S7. Set the actual winding tension of the winding shaft according to the initial winding tension and a preset rule;

[0014] S8. The aluminum alloy strip to be straightened is straightened and wound up to obtain the finished aluminum alloy strip.

[0015] Preferably, in step S1, the preset values ​​are: the horizontality of the winding shaft is less than or equal to 0.05 mm / m, the radial runout of the winding shaft is less than or equal to 0.25 mm, the axial runout of the winding shaft is less than or equal to 0.25 mm, and the parallelism of the winding shaft relative to the exit guide roller of the bending straightener is less than or equal to 0.1 mm.

[0016] Preferably, in step S2, the metal temperature of the aluminum alloy strip to be straightened after cooling treatment reaches ±3°C of the workshop ambient temperature and is less than or equal to 45°C.

[0017] Preferably, in step S2, a cooling device is provided between the drying box and the tension roller of the bending straightener, and the aluminum alloy strip to be straightened is cooled by the cooling device before straightening.

[0018] Preferably, in step S4, the target value of the plate-shaped wave is: the wave height of the initial sample is less than or equal to 2 mm and the wavelength of the initial sample is greater than or equal to 333 mm.

[0019] Preferably, in step S5, the target value for plate bending is: the transverse bending of the precision sample is less than or equal to 1.5 mm, and the longitudinal bending of the precision sample is less than or equal to 3 mm.

[0020] Preferably, in step S6, the initial winding tension satisfies the following rule:

[0021] F 初始 =H*B*σ 0.2 *K;

[0022] Among them, F 初始 The initial winding tension is set at the beginning of the winding shaft; H represents the thickness of the aluminum alloy strip to be straightened; B represents the width of the aluminum alloy strip to be straightened; σ 0.2 The value represents the yield strength parameter of the aluminum alloy strip to be straightened; K represents the adjustment coefficient.

[0023] Preferably, in step S7, the preset rule is a gradient-type actual winding tension that satisfies the following conditions:

[0024] F 实际 =F 初始 *(1-α*(D 实时 -D min ) / (D max -D min ));

[0025] Among them, F 实际 The actual winding tension of the winding shaft is represented by α, which represents the tension gradient coefficient, and D is the actual winding tension of the winding shaft. 实时 D represents the actual outer diameter of the aluminum alloy strip to be straightened when it is wound up after straightening. min D represents the outer diameter of the sleeve of the aluminum alloy strip to be straightened when it is not coiled. max This indicates the maximum outer diameter of the strip that the take-up shaft allows.

[0026] Preferably, in step S8, the winding process of the aluminum alloy strip to be straightened includes a speed-up stage from 0 to stable operation, a stable operation stage at a constant speed, and a speed-down stage from stable operation to 0. The production speed in the stable operation stage is less than or equal to 120 m / min, and the production speed deviation of the finished aluminum alloy strip in the stable operation stage is ±2 m / min.

[0027] Preferably, in step S8, the acceleration phase lasts for less than or equal to 10 seconds, and the deceleration phase lasts for less than or equal to 10 seconds.

[0028] Compared with the prior art, the present invention adjusts the precision of the winding shaft of the bending and straightening machine, reduces the temperature of the aluminum alloy strip, improves the standard of the aluminum alloy strip shape, standardizes the winding tension of the aluminum alloy strip during winding, adopts a certain gradient variable tension control mode for the actual winding tension, and limits the maximum production speed and deviation value of the aluminum alloy strip as well as the time consumed in the lifting and lowering stages. This invention aims to prevent adhesion defects in aluminum alloy strip during winding. It overcomes the limitations of traditional methods, such as adding pressure rollers above the winding shaft of a bending and straightening machine to press the strip, which reduces the effectiveness of speed-up improvements in reducing adhesion defects and introduces new pits and scratches. It also overcomes the drawbacks of pre-winding methods, such as increased costs, oxidation corrosion, pits, scratches, wrinkles, color differences, and bulges, which involve coating or padding the strip surface before winding. Furthermore, it overcomes the disadvantages of pre-winding methods, such as the risk of fire, operator discomfort, increased oil stains, color differences, increased production costs for subsequent processes, and poor coating quality. Therefore, this invention significantly reduces or even eliminates adhesion defects in aluminum alloy strip produced by a bending and straightening machine. Attached Figure Description

[0029] The present invention will now be described in detail with reference to the accompanying drawings. The above and other aspects of the present invention will become clearer and more readily understood through the detailed description following the accompanying drawings. In the drawings:

[0030] Figure 1 This is a flowchart of the method for winding aluminum alloy strip provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the fine sample being rolled up according to an embodiment of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0033] Please refer to Figures 1-2This invention provides a method for winding aluminum alloy strip, the method comprising the following steps:

[0034] S1. Adjust the accuracy of the take-up shaft of the bending straightening machine to the preset value.

[0035] In this embodiment of the invention, the preset values ​​are: the accuracy of the winding shaft of the bending straightener, namely, the horizontality of the winding shaft, the radial runout of the winding shaft, the axial runout of the winding shaft, and the parallelism of the winding shaft relative to the exit guide roller. The larger these values ​​are, the worse the accuracy of the winding shaft, and the greater the probability, wider distribution, and severity of adhesion defects caused by interlayer misalignment of the aluminum alloy strip during production. Therefore, the horizontality of the winding shaft is less than or equal to 0.05 mm / m, the radial runout of the winding shaft is less than or equal to 0.25 mm, the axial runout of the winding shaft is less than or equal to 0.25 mm, and the parallelism of the winding shaft relative to the exit guide roller of the bending straightener is less than or equal to 0.1 mm. Only when all the accuracy values ​​of the winding shaft meet the above preset value range can subsequent production steps be carried out, thereby effectively reducing the adhesion defect problem caused by interlayer misalignment of the aluminum alloy strip.

[0036] S2. Before straightening the aluminum alloy strip to be straightened, the aluminum alloy strip to be straightened is cooled.

[0037] In this embodiment of the invention, the aluminum alloy strip to be straightened is cooled to bring its metal temperature to within ±3°C of the workshop ambient temperature, with the highest metal temperature ≤45°C. Specifically, the workshop ambient temperature refers to the indoor temperature of the surrounding workshop or factory during the production of the aluminum alloy strip to be straightened, which varies with the ambient temperature.

[0038] Specifically, existing tension straightening machines are generally equipped with water washing functions. After water washing, the aluminum alloy strip needs to be dried. The temperature of the dried aluminum alloy strip is generally 90-120℃. The aluminum alloy strip enters the straightening stage without cooling or with only simple cooling. Since the coefficient of thermal expansion of aluminum alloy is 20-24μm / m*℃, the higher the temperature of the aluminum alloy strip, the more intense the hot rolling expansion. During the subsequent cooling to room temperature, the shrinkage of the aluminum alloy strip is more intense, leading to a higher probability, wider distribution, and more severe degree of interlayer misalignment and adhesion defects. Therefore, this invention limits the upper limit of the temperature of the aluminum alloy strip to be straightened. At the same time, considering the production cost of cooling and adaptability to ambient temperature, the temperature of the aluminum alloy strip to be straightened should be limited to a certain range.

[0039] In this embodiment of the invention, a cooling device is provided between the drying box and the tension roller of the bending straightener, which enables the aluminum alloy strip to be straightened to be cooled quickly and at low cost.

[0040] S3. A portion of the aluminum alloy strip to be straightened after cooling is straightened by the stretch straightening machine to obtain a first aluminum alloy strip, and a sample is taken from the first aluminum alloy strip to obtain an initial sample.

[0041] In this embodiment of the invention, the aluminum alloy strip to be straightened is stretched and straightened by the tension roller of the stretch bending straightening machine and pressed and straightened by the straightening roller of the stretch bending straightening machine. After the first aluminum alloy strip is obtained by the straightening process, the first aluminum alloy strip is sampled to obtain an initial sample.

[0042] S4. Detect whether the initial sample meets the target value of plate shape wave. If so, cut the initial sample into multiple fine samples of the same size along the rolling direction and perpendicular to the rolling direction in the width direction.

[0043] In this embodiment of the invention, the initial sample is placed on a standard marble platform for testing. For the initial sample that meets the target value of plate shape wave (i.e., the wave height of the initial sample is less than or equal to 2 mm and the wavelength of the initial sample is greater than or equal to 333 mm), the initial sample is cut into multiple fine samples of the same size along the rolling direction in the width direction.

[0044] S5. Detect the transverse and longitudinal bending of the multiple precision samples respectively, and determine whether the transverse and longitudinal bending of each precision sample meets the plate bending target value. If so, proceed to step S6.

[0045] In this embodiment of the invention, the refined sample is placed on a standard marble platform for testing. Each refined sample must meet the following requirements: the transverse curvature of the refined sample is less than or equal to 1.5 mm, and the longitudinal curvature of the refined sample is less than or equal to 3 mm. Only when the refined sample meets both of the above indicators can the subsequent production steps be carried out.

[0046] Specifically, the larger the wave height and the smaller the wavelength of the aluminum alloy strip, the worse the overall and local shape of the strip. During the winding process, the probability, distribution, and severity of adhesion defects caused by interlayer misalignment are higher. Therefore, limiting the wavelength and wave height of the initial sample and the longitudinal and transverse bending of the final sample can effectively reduce adhesion defects caused by interlayer misalignment. Simultaneously, to improve the post-straightening shape of the aluminum alloy strip, commonly used 3-roll and 5-roll roller straighteners can be upgraded to 7-roll, 9-roll, 11-roll, or 13-roll straightening methods, and equipped with one or more sets of anti-transverse bending straightening roller systems.

[0047] S6. Perform mechanical property testing on the aluminum alloy strip to be straightened to obtain the corresponding yield strength parameter, and calculate the initial winding tension of the winding shaft based on the yield strength parameter.

[0048] In this embodiment of the invention, the initial winding tension satisfies the following rule:

[0049] F 初始 =H*B*σ 0.2 *K;

[0050] Among them, F 初始 The initial winding tension (in N) is the initial setting of the winding shaft; H represents the thickness (in mm) of the aluminum alloy strip to be straightened; B represents the width (in mm) of the aluminum alloy strip to be straightened; σ 0.2 This indicates the yield strength parameter of the aluminum alloy strip to be straightened (unit: N / mm). 2 (i.e., MPa), where K represents the adjustment coefficient, which is generally taken as 3.5-5%.

[0051] Specifically, the initial winding tension of the winding shaft is related to the thickness, width, yield strength, and adjustment coefficient of the precision sample, and directly affects the actual winding tension of the aluminum alloy strip. If the actual winding tension deviates too little or too much from the reasonable range, the probability, distribution, and severity of interlayer misalignment and adhesion defects in the aluminum alloy strip will increase. However, the industry practice is for operators to set the tension based on past experience, which is somewhat arbitrary. This invention, by extracting specific mathematical calculation formulas, ensures the accuracy of the set values.

[0052] S7. Set the actual winding tension of the winding shaft according to the initial winding tension and a preset rule.

[0053] In this embodiment of the invention, the actual winding tension of the take-up shaft adopts a "variable tension with a certain gradient" control mode, wherein the preset rule is a gradient-type actual winding tension that satisfies the following conditions:

[0054] F 实际 =F 初始 *(1-α*(D 实时 -D min ) / (D max -D min ));

[0055] Among them, F 实际 The actual winding tension is represented by α (in N), where α represents the tension gradient coefficient (in %), and D... 实时 D represents the actual outer diameter (in mm) of the aluminum alloy strip to be straightened when it is wound up after straightening. min D represents the outer diameter of the sleeve when the aluminum alloy strip to be straightened is not wound up (i.e., the outer diameter of the paper sleeve, aluminum sleeve, or steel sleeve when the aluminum alloy strip to be straightened is not wound up, in mm). max This indicates the maximum allowable outer diameter of the strip coil (in mm) of the take-up shaft.

[0056] Specifically, during the winding process of the aluminum alloy strip to be straightened, the coil diameter increases, and the wrap angle between the aluminum alloy strip to be straightened and the exit guide roller, as well as the tangent point of the strip winding, are constantly changing (e.g., Figure 2 As shown, if the winding tension of the aluminum alloy strip to be straightened remains constant, the probability, distribution, and severity of interlayer misalignment and subsequent adhesion defects are higher. Therefore, the winding tension of the aluminum alloy strip to be straightened needs to decrease according to a certain pattern as the roll diameter increases to reduce the impact of interlayer misalignment. Thus, this invention introduces the concept of a gradient and provides a mathematical formula for the actual winding tension versus the initial winding tension, ensuring the accuracy of the actual winding tension.

[0057] S8. The aluminum alloy strip to be straightened is straightened and wound up to obtain the finished aluminum alloy strip.

[0058] In this embodiment of the invention, the winding process of the aluminum alloy strip to be straightened includes a speed-up stage from 0 to stable operation, a stable operation stage at a constant speed, and a speed-down stage from stable operation to 0. The production speed during the stable operation stage is less than or equal to 120 m / min, and the production speed deviation of the finished aluminum alloy strip during the stable operation stage is ±2 m / min. The speed-up stage takes less than or equal to 10 seconds, and the speed-down stage takes less than or equal to 10 seconds.

[0059] Specifically, the higher the absolute value and the greater the fluctuation of the production speed of aluminum alloy strip, the more severe the interlayer misalignment of the aluminum alloy strip and the radial runout of the winding shaft will be. Ultimately, this increases the probability, distribution, and severity of adhesion defects caused by interlayer misalignment in the aluminum alloy strip. Therefore, this invention effectively reduces adhesion defects caused by interlayer misalignment of the aluminum alloy strip by limiting the maximum production speed and the production speed deviation value. Simultaneously, the longer the aluminum alloy strip is in the unstable phases of acceleration and deceleration, the longer the number of defective meters due to adhesion will be. Therefore, the time spent in the acceleration and deceleration phases of the aluminum alloy strip is limited.

[0060] To better understand the effect of the aluminum alloy strip winding method proposed in this invention, the winding method proposed in this invention and the winding method not proposed in this invention were tested on a 1850mm tension straightening machine. The comparison results are shown in Table 1 below.

[0061] Table 1 [Comparison of Winding Effects]

[0062]

[0063]

[0064] As can be seen, the finished aluminum alloy strip obtained through the above steps of the present invention, upon inspection, shows that the number of defective meters of winding adhesion is only scattered in the inner ring bottom ≤30 meters and the outer ring ≤10 meters area, which greatly reduces the adhesion defects of aluminum and aluminum alloy strip.

[0065] Compared with the prior art, the present invention adjusts the precision of the winding shaft of the bending and straightening machine, reduces the temperature of the aluminum alloy strip, improves the standard of the aluminum alloy strip shape, standardizes the winding tension of the aluminum alloy strip during winding, adopts a certain gradient variable tension control mode for the actual winding tension, and limits the maximum production speed and deviation value of the aluminum alloy strip as well as the time consumed in the lifting and lowering stages. This invention aims to prevent adhesion defects in aluminum alloy strip during winding. It overcomes the limitations of traditional methods, such as adding pressure rollers above the winding shaft of a bending and straightening machine to press the strip, which reduces the effectiveness of speed-up improvements in reducing adhesion defects and introduces new pits and scratches. It also overcomes the drawbacks of pre-winding methods, such as increased costs, oxidation corrosion, pits, scratches, wrinkles, color differences, and bulges, which involve coating or padding the strip surface before winding. Furthermore, it overcomes the disadvantages of pre-winding methods, such as the risk of fire, operator discomfort, increased oil stains, color differences, increased production costs for subsequent processes, and poor coating quality. Therefore, this invention significantly reduces or even eliminates adhesion defects in aluminum alloy strip produced by a bending and straightening machine.

[0066] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0067] The embodiments of the present invention have been described above with reference to the accompanying drawings. The disclosed embodiments are merely preferred embodiments of the present invention. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many equivalent changes in form without departing from the spirit and scope of the claims of the present invention, and all such changes are within the protection scope of the present invention.

Claims

1. A method for winding aluminum alloy strip, characterized in that, The winding method includes the following steps: S1. Adjust the accuracy of the winding shaft of the bending straightening machine to the preset value; S2. Before straightening the aluminum alloy strip to be straightened, the aluminum alloy strip to be straightened is cooled. S3. A portion of the aluminum alloy strip to be straightened after cooling is straightened by the stretch straightening machine to obtain a first aluminum alloy strip, and a sample is taken from the first aluminum alloy strip to obtain an initial sample. S4. Detect whether the initial sample meets the target value of plate shape wave. If so, cut the initial sample into multiple fine samples of the same size along the rolling direction and perpendicular to the rolling direction in the width direction. S5. Detect the transverse and longitudinal bending of the multiple fine samples respectively, and determine whether the transverse and longitudinal bending of each fine sample meets the plate bending target value. If so, proceed to step S6. S6. Perform mechanical property testing on the aluminum alloy strip to be straightened to obtain the corresponding yield strength parameter, and calculate the initial winding tension of the winding shaft based on the yield strength parameter; S7. Set the actual winding tension of the winding shaft according to the initial winding tension and a preset rule; S8. The aluminum alloy strip to be straightened is straightened and wound up to obtain the finished aluminum alloy strip. In step S8, the winding process of the aluminum alloy strip to be straightened includes a speed-up stage from 0 to stable operation, a stable operation stage at a constant speed, and a speed-down stage from stable operation to 0. The production speed in the stable operation stage is less than or equal to 120 m / min, and the production speed deviation of the finished aluminum alloy strip in the stable operation stage is ±2 m / min. The acceleration phase lasts for less than or equal to 10 seconds, and the deceleration phase lasts for less than or equal to 10 seconds.

2. The method for winding aluminum alloy strip as described in claim 1, characterized in that, In step S1, the preset values ​​are: the horizontality of the winding shaft is less than or equal to 0.05 mm / m, the radial runout of the winding shaft is less than or equal to 0.25 mm, the axial runout of the winding shaft is less than or equal to 0.25 mm, and the parallelism of the winding shaft relative to the exit guide roller of the bending straightener is less than or equal to 0.1 mm.

3. The method for winding aluminum alloy strip as described in claim 1, characterized in that, In step S2, the metal temperature of the aluminum alloy strip to be straightened after cooling treatment reaches ±3℃ of the workshop ambient temperature and is less than or equal to 45℃.

4. The method for winding aluminum alloy strip as described in claim 1, characterized in that, In step S2, a cooling device is provided between the drying box and the tension roller of the bending straightener. Before the aluminum alloy strip to be straightened is straightened, the aluminum alloy strip to be straightened is cooled by the cooling device.

5. The method for winding aluminum alloy strip as described in claim 1, characterized in that, In step S4, the target value of the plate-shaped wave is: the wave height of the initial sample is less than or equal to 2 mm and the wavelength of the initial sample is greater than or equal to 333 mm.

6. The method for winding aluminum alloy strip as described in claim 1, characterized in that, In step S5, the target value for plate bending is: the transverse bending of the precision sample is less than or equal to 1.5 mm, and the longitudinal bending of the precision sample is less than or equal to 3 mm.

7. The method for winding aluminum alloy strip as described in claim 1, characterized in that, In step S6, the initial winding tension satisfies the following rule: ； Among them, F 初始 The initial winding tension is set at the beginning of the winding shaft; H represents the thickness of the aluminum alloy strip to be straightened; B represents the width of the aluminum alloy strip to be straightened; σ 0.2 The value represents the yield strength parameter of the aluminum alloy strip to be straightened; K represents the adjustment coefficient.

8. The method for winding aluminum alloy strip as described in claim 7, characterized in that, In step S7, the preset rule is a gradient-type actual winding tension that satisfies the following conditions: ； Among them, F 实际 The actual winding tension of the winding shaft is represented by α, which represents the tension gradient coefficient, and D is the actual winding tension of the winding shaft. 实时 D represents the actual outer diameter of the aluminum alloy strip to be straightened when it is wound up after straightening. min D represents the outer diameter of the sleeve of the aluminum alloy strip to be straightened when it is not coiled. max This indicates the maximum outer diameter of the strip that the take-up shaft allows.

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