Method for treating C warping in leveling process

Abstract

The invention discloses a method for treating C warping in a leveling process, which comprises the following steps of: collecting field process parameters, judging the type of C warping, calculating the difference between the extensions of the upper and lower surfaces in the width direction according to a geometrical relationship, calculating the length of a rolling area, and calculating the difference between the extensions of the upper and lower surfaces of strip steel in the length direction. Stress difference of the upper surface and the lower surface of the strip steel is calculated according to extension difference of the upper surface and the lower surface of the strip steel in the length direction, wrap angles of the to-be-adjusted anti-shake roller and the anti-wrinkle roller are calculated, height of the to-be-adjusted anti-shake roller and the anti-wrinkle roller after adjustment is calculated according to the wrap angles of the to-be-adjusted anti-shake roller and the anti-wrinkle roller, and hq '< hq0-after adjustment is judged to be smaller than hq0-. If yes, adjustment is completed. The method is combined with temper mill unit equipment, treatment of the C warping defect of the strip steel on the temper mill unit is achieved, the quality and performance of the finished strip steel are guaranteed, and the instability of subsequent production is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of continuous annealing, and particularly relates to a method for controlling C warping in a leveling process. Background Art

[0002] During the leveling process, the strip is affected by factors such as the roller system, friction coefficient, strip transmission, as well as the temperature difference and uneven plastic deformation between the upper and lower surfaces of the strip, causing the strip to exhibit lateral warping (referred to as C-warping defect).

[0003] During the leveling process, due to the inevitable unequal wear of the upper and lower rollers, the inability of the upper and lower double-support roller transmission to ensure completely consistent rotation speeds, and the difference in friction coefficients between the upper and lower surfaces, asymmetric rolling is formed under the combined effect of many asymmetric factors. Therefore, the distribution of unit rolling pressure, the magnitude and distribution of friction forces on the upper and lower surfaces of the strip in the deformation zone are different. The action of the upper and lower asymmetric rolling pressures and the upper and lower asymmetric friction forces will inevitably lead to uneven distribution of tensile stress along the thickness. There is a difference in metal flow between the upper and lower surfaces of the strip, which will cause shear deformation in the thickness direction, thereby inducing uneven lateral extension in the thickness direction. The difference in lateral extension between the upper and lower surfaces of the strip forms a C-warp defect. Furthermore, a large tensile stress corresponds to a smaller lateral extension, and a small tensile stress corresponds to a larger lateral extension. When the lateral extension of the upper surface of the strip is less than that of the lower surface, it is an upper C-warp type; otherwise, it is a lower C-warp type. The C-warp defect not only affects the overall beauty of the strip, but also causes quality problems in the subsequent processes of the strip, thereby reducing the quality grade and yield rate of the product, and causing great economic losses to the unit. Summary of the invention

[0004] In order to solve the C-warping phenomenon during the leveling process of the steel plate, the technical solution adopted in this application is as follows: A method for controlling C-warping during the leveling process includes the following steps:

[0005] A method for treating C warping during a leveling process, characterized in that it comprises the following steps:

[0006] S1: Obtaining process parameters during strip leveling;

[0007] S2: According to the process parameters in the strip flattening process, the difference in the extension amount between the upper and lower surfaces of the strip in the width direction ΔB, the difference in the extension amount between the upper and lower surfaces of the strip in the length direction Δl; the stress difference between the upper and lower surfaces of the strip Δσ;

[0008] S3: According to the C warping type, the difference in the extension of the upper and lower surfaces of the strip in the width direction ΔB, the difference in the extension of the upper and lower surfaces of the strip in the length direction Δl; the stress difference Δσ between the upper and lower surfaces of the strip, the wrap angle α to be adjusted between the anti-trembling roller and the anti-wrinkle roller is calculated. fz , α fc ;

[0009] S4: Adjust the heights of the anti-vibration roller and the anti-wrinkle roller according to the wrap angles α fz and α fc of the anti-vibration roller and the anti-wrinkle roller, so as to change the stresses on the upper and lower surfaces of the strip steel;

[0010] S5: After measuring and adjusting the heights of the anti-vibration roller and the anti-wrinkle roller, measure the camber value h q ' of the strip steel, and judge whether it meets h q ' < h q0 , where h q0 is the set C-camber value; when h q ' < h q0 , the treatment ends; when h q ' ≥ h q0 , return to S2 and continue to adjust the camber value of the strip steel.

[0011] Further, the process parameters during the strip steel leveling process include the height H fz of the anti-wrinkle roller, the height H fc of the anti-vibration roller, the wrap angle α fz of the anti-wrinkle roller, the wrap angle α fc of the anti-vibration roller, the friction coefficients μ of the upper and lower surfaces of the strip steel, the camber type and camber value h q at the outlet of the leveling unit, the radius R of the work roll, the thickness h0 of the strip steel before leveling, the thickness h1 of the strip steel after leveling, the width B of the strip steel before leveling, the front tension T0 during the leveling rolling process, and the back tension T1 during the leveling rolling process.

[0012] Further, the difference ΔB in the elongation between the upper and lower surfaces of the strip steel in the width direction is determined according to the central angle α c of the geometric curve and the thickness h1 of the strip steel after leveling.

[0013] Further, the length l of the strip steel rolling area is determined according to the radius R of the work roll, the thickness h0 of the strip steel before leveling, and the thickness h1 of the strip steel after leveling.

[0014] Further, the difference Δl in the elongation between the upper and lower surfaces of the strip steel in the length direction is determined according to the width B of the strip steel before leveling, the difference ΔB in the elongation between the upper and lower surfaces of the strip steel in the width direction, the thickness h0 of the strip steel before leveling, the thickness h1 of the strip steel after leveling, and the length l of the strip steel rolling area.

[0015] Further, the stress difference Δσ between the upper and lower surfaces of the strip steel is determined according to the difference Δl in the elongation between the upper and lower surfaces of the strip steel, the length l of the strip steel rolling area, and the Poisson's ratio v of the strip steel.

[0016] Further, the adjusted wrap angle α' fz of the anti-vibration roller and the adjusted wrap angle α' fcBased on the warping type at the exit of the skin pass mill, it is determined according to the wrap angle α of the anti-wrinkle roll fz and the wrap angle α of the anti-vibration roll fc and the adjustment amount Δα of the wrap angle.

[0017] A device for treating C-warping during the skin pass process includes:

[0018] An acquisition module: used to acquire the process parameters during the skin pass of the strip steel;

[0019] Calculation module I: According to the process parameters during the skin pass of the strip steel, calculate the difference ΔB in the elongation of the upper and lower surfaces in the width direction of the strip steel, the difference Δl in the elongation of the upper and lower surfaces of the strip steel in the length direction; the stress difference Δσ between the upper and lower surfaces of the strip steel;

[0020] Calculation module II: Used to calculate the wrap angles α fz and α fc to be adjusted for the anti-vibration roll and the anti-wrinkle roll according to the C-warping type, the difference ΔB in the elongation of the upper and lower surfaces in the width direction of the strip steel, the difference Δl in the elongation of the upper and lower surfaces of the strip steel in the length direction; the stress difference Δσ between the upper and lower surfaces of the strip steel;

[0021] Adjustment module: Used to adjust the heights of the anti-vibration roll and the anti-wrinkle roll according to the wrap angles α fz and α fc to be adjusted for the anti-vibration roll and the anti-wrinkle roll, so as to change the stress on the upper and lower surfaces of the strip steel;

[0022] Judgment module: Used to measure the warping value h q ′ of the strip steel after adjusting the heights of the anti-vibration roll and the anti-wrinkle roll, and judge whether it meets h q ′ < h q0 , where h q0 is the set C-warping value; when h q ′ < h q0 , the treatment ends, and when h q ′ ≥ h q0 , return to calculation module I to continue adjusting the warping value of the strip steel.

[0023] The purpose of the present invention is to provide a method for treating C-warping during the skin pass process, which can effectively treat the C-warping defect of the strip steel during the skin pass process.

[0024] The beneficial effect of the present invention is that: compared with the prior art, the method of the present invention adjusts the heights of the anti-vibration roll and the anti-wrinkle roll according to the measured warping data by using the existing warping meter to treat the C-warping defect generated during the skin pass process.

[0025] The specific camber adjustment operation is as follows: When the strip warps, based on the data measured by the camber meter, calculate the elongation of the upper and lower surfaces, and then obtain the stress difference between the upper and lower surfaces. Adjust the heights of the anti-wrinkle roll and anti-vibration roll to change the stress on the upper and lower surfaces to complete the adjustment of the C-camber. The method of the present invention is applied to the temper mill equipment with a camber meter, realizing the transverse camber control of the strip, improving the finished product quality of the strip product, bringing economic benefits to the enterprise, and having great popularization value. Description of the Drawings

[0026] Figure 1 It is a flow chart of the method for treating C-camber during the tempering process of the present invention;

[0027] Figure 2 It is a classification diagram of C-camber warping types in the present invention. Specific Embodiments

[0028] To further illustrate the application process of the technology of the present invention, taking the production performance of a certain tempering section as an example, the application of this method on site is described in detail.

[0029] A method for treating C-camber during tempering includes the following steps:

[0030] S1: Obtain the process parameters during the tempering of the strip;

[0031] S2: According to the process parameters during the tempering of the strip, calculate the difference in elongation ΔB between the upper and lower surfaces in the width direction of the strip, the difference in elongation Δl between the upper and lower surfaces of the strip in the length direction; and the stress difference Δσ between the upper and lower surfaces of the strip;

[0032] S3: Calculate the wrap angles α fz , α fc to be adjusted for the anti-vibration roll and anti-wrinkle roll according to the C-camber type, the difference in elongation ΔB between the upper and lower surfaces in the width direction of the strip, the difference in elongation Δl between the upper and lower surfaces of the strip in the length direction; and the stress difference Δσ between the upper and lower surfaces of the strip;

[0033] S4: According to the wrap angles α fz , α fc to be adjusted for the anti-vibration roll and anti-wrinkle roll, adjust the heights of the anti-vibration roll and anti-wrinkle roll, thereby changing the stress on the upper and lower surfaces of the strip;

[0034] S5: After measuring and adjusting the heights of the anti-vibration roll and anti-wrinkle roll, measure the camber value h q ′ of the strip, and judge whether it meets h q ′ < h q0 , where h q0 is the set C-camber value; when h q ′ < h q0 , the treatment ends, and when h q ′ ≥ hq0 If so, return to S2 and continue to adjust the camber value of the strip steel.

[0035] The steps S1 / S2 / S3 / S4 / S5 are executed in sequence;

[0036] Furthermore, the process parameters during the strip steel tempering process include the height H of the anti-wrinkle roll fz , the height H of the anti-vibration roll fc , the wrap angle α of the anti-wrinkle roll fz , the wrap angle α of the anti-vibration roll fc , the friction coefficients μ of the upper and lower surfaces of the strip steel, the warping type and camber value h at the outlet of the tempering mill q , the radius R of the work roll, the thickness h0 of the strip steel before tempering, the thickness h1 of the strip steel after tempering, the width B of the strip steel before tempering, the front tension T0 during the tempering rolling process, and the back tension T1 during the tempering rolling process.

[0037] Furthermore, the difference ΔB in the elongation of the upper and lower surfaces of the strip steel in the width direction is determined according to the central angle α of the geometric curve c , and the thickness h1 of the strip steel after tempering. The specific formula is as follows:

[0038]

[0039] where: r is the radius of the geometric curve, α c is the central angle of the geometric curve, h1 is the thickness of the strip steel after tempering, B is the width of the strip steel before tempering, and h q is the camber value;

[0040] Furthermore, the length l of the strip steel rolling area is determined according to the radius R of the work roll, the thickness h0 of the strip steel before tempering, and the thickness h1 of the strip steel after tempering. The specific formula is as follows:

[0041]

[0042] Furthermore, the difference Δl in the elongation of the upper and lower surfaces of the strip steel in the length direction is determined according to the width B of the strip steel before tempering, the difference ΔB in the elongation of the upper and lower surfaces of the strip steel in the width direction, the thickness h0 of the strip steel before tempering, the thickness h1 of the strip steel after tempering, and the length l of the strip steel rolling area. The specific formula is as follows:

[0043]

[0044] Furthermore, the stress difference Δσ between the upper and lower surfaces of the strip steel is determined according to the difference Δl in the elongation of the upper and lower surfaces of the strip steel, the length l of the strip steel rolling area, and the Poisson's ratio v of the strip steel. The specific formula is as follows:

[0045]

[0046] Further: according to the C warp type, the C warp type includes the upper C warp and the lower C warp cases, the difference ΔB in the extension amounts of the upper and lower surfaces in the strip width direction, the difference Δl in the extension amounts of the upper and lower surfaces of the strip in the length direction; the stress difference Δσ between the upper and lower surfaces of the strip is used to calculate the wrap angles α fz and α fc to be adjusted for the anti-vibration roller and the anti-wrinkle roller. The specific formula is as follows:

[0047]

[0048] Further, according to the wrap angles α fz and α fc to be adjusted for the anti-vibration roller and the anti-wrinkle roller, the heights of the anti-vibration roller and the anti-wrinkle roller are adjusted. The specific formula is as follows:

[0049]

[0050] A C warp treatment device during the tempering process includes:

[0051] An acquisition module: used to acquire the process parameters during the strip tempering process;

[0052] A calculation module I: According to the process parameters during the strip tempering process, calculate the difference ΔB in the extension amounts of the upper and lower surfaces in the strip width direction, the difference Δl in the extension amounts of the upper and lower surfaces of the strip in the length direction; the stress difference Δσ between the upper and lower surfaces of the strip;

[0053] A calculation module II: used to calculate the wrap angles α fz and α fc to be adjusted for the anti-vibration roller and the anti-wrinkle roller according to the C warp type, the difference ΔB in the extension amounts of the upper and lower surfaces in the strip width direction, the difference Δl in the extension amounts of the upper and lower surfaces of the strip in the length direction; the stress difference Δσ between the upper and lower surfaces of the strip;

[0054] An adjustment module: used to adjust the heights of the anti-vibration roller and the anti-wrinkle roller according to the wrap angles α fz and α fc to be adjusted for the anti-vibration roller and the anti-wrinkle roller, so as to change the stresses on the upper and lower surfaces of the strip;

[0055] A judgment module: used to measure the warp value h q ' of the strip after adjusting the heights of the anti-vibration roller and the anti-wrinkle roller, and judge whether it meets h q ' < h q0 , where h q0 is the set C warp value; when h q ' < h q0 , the treatment ends. When h q ' ≥ h q0 , the calculation module I is returned to continue adjusting the warp value of the strip.

[0056] Example 1

[0057] As Figure 1 shown, a method for controlling C-warping during the leveling process of the present invention has the following implementation steps.

[0058] In step S1, on-site process parameters are collected, including the height H of the anti-wrinkle roll fz = 110 mm, the height H of the anti-vibration roll fc = 130 mm, the wrap angle α of the anti-wrinkle roll fz = 6.88°, the wrap angle α of the anti-vibration roll fc = 8.6°, the friction coefficient μ between the upper and lower surfaces = 0.1, the type of warping at the outlet of the leveling unit is downward warping, the warping value h q = 10 mm, the radius R of the work roll = 200 mm, the thicknesses of the strip before and after leveling are h0 = 1.2 mm and h1 = 1 mm respectively, the width B of the strip before leveling = 1000 mm, the front tension T0 = 50 MPa, and the rear tension T1 = 60 MPa during the leveling rolling process.

[0059] In step S2, according to the process parameters during the strip leveling process, the difference ΔB in the elongation between the upper and lower surfaces in the width direction of the strip, the difference Δl in the elongation between the upper and lower surfaces of the strip in the length direction, and the stress difference Δσ between the upper and lower surfaces of the strip are calculated;

[0060] S21: According to the measured warping value on-site, the difference ΔB in the elongation between the upper and lower surfaces in the width direction is calculated through geometric relationships, where r is the radius of the geometric curve and α c is the central angle of the geometric curve:

[0061]

[0062] After calculation: ΔB = 0.079988 mm;

[0063] In step S22, the length l of the rolling area is calculated:

[0064]

[0065] After calculation: l = 6.325 mm;

[0066] In step S23, the difference Δl in the elongation between the upper and lower surfaces of the strip in the length direction is calculated:

[0067]

[0068] After calculation: Δl = 1.2644 mm;

[0069] In step S24, the stress difference Δσ between the upper and lower surfaces of the strip is calculated according to the difference Δl in the elongation between the upper and lower surfaces of the strip in the length direction:

[0070]

[0071] After calculation: Δσ = 46.132 MPa;

[0072] In step S3, according to the C - warp type, the difference ΔB in the elongation of the upper and lower surfaces of the strip in the width direction, the difference Δl in the elongation of the upper and lower surfaces of the strip in the length direction, and the stress difference Δσ between the upper and lower surfaces of the strip, the wrap angles α to be adjusted for the anti - vibration roller and the anti - wrinkling roller are calculated fz 、α fc :

[0073]

[0074] After calculation:

[0075] In step S4, according to the wrap angles α to be adjusted for the anti - vibration roller and the anti - wrinkling roller fz 、α fc , the heights of the anti - vibration roller and the anti - wrinkling roller are adjusted, so that the strip changes the stress on the upper and lower surfaces:

[0076]

[0077] After calculation:

[0078] In step S5, the adjusted heights of the anti - vibration roller and the anti - wrinkling roller are The warp value h of the strip after adjustment is measured q ′ = 3.8 mm, and h q ′ < 5 mm holds, and the adjustment ends.

[0079] Example 2

[0080] As Figure 1 shown, a method for treating C - warp during the tempering process of the present invention is implemented as follows.

[0081] In step S1, on - site process parameters are collected, including the height H of the anti - wrinkling roller fz = 110 mm, the height H of the anti - vibration roller fc = 130 mm, the wrap angle α of the anti - wrinkling roller fz = 6.88°, the wrap angle α of the anti - vibration roller fc = 8.6°, the friction coefficient μ between the upper and lower surfaces = 0.1, the warp type at the outlet of the tempering mill is upward warp, the warp value h q = 12 mm, the radius R of the work roll = 200 mm, the strip thicknesses before and after tempering are h0 = 1.2 mm, h1 = 1 mm, the strip width B before tempering = 1000 mm, and the front and rear tensions during the tempering rolling process are T0 = 50 MPa, T1 = 60 MPa.

[0082] In step S2, according to the process parameters during the strip tempering process, the difference in elongation ΔB between the upper and lower surfaces in the width direction of the strip, the difference in elongation Δl between the upper and lower surfaces of the strip in the length direction, and the stress difference Δσ between the upper and lower surfaces of the strip are calculated;

[0083] S21: According to the measured camber value h q , the difference in elongation ΔB between the upper and lower surfaces in the width direction is calculated through geometric relationships, where r is the radius of the geometric curve and α c is the central angle of the geometric curve:

[0084]

[0085] After calculation: ΔB = 0.095923 mm;

[0086] In step SS22, the length l of the rolling area is calculated:

[0087]

[0088] After calculation: l = 6.325 mm;

[0089] In step S23, the difference in elongation Δl between the upper and lower surfaces of the strip in the length direction is calculated:

[0090]

[0091] After calculation: Δl = 1.2643 mm;

[0092] In step S24, the stress difference Δσ between the upper and lower surfaces of the strip is calculated based on the difference in elongation between the upper and lower surfaces of the strip in the length direction:

[0093]

[0094] After calculation: Δσ = 46.128 MPa;

[0095] In step S3, according to the C-camber type, the difference in elongation ΔB between the upper and lower surfaces in the width direction of the strip, the difference in elongation Δl between the upper and lower surfaces of the strip in the length direction, and the stress difference Δσ between the upper and lower surfaces of the strip, the angles α fz , α fc to be adjusted for the anti-vibration roll and the anti-wrinkle roll are calculated:

[0096]

[0097] After calculation:

[0098] In step S4, according to the angles α fz , α fc, adjust the heights of the anti-vibration roller and the anti-wrinkle roller, so that the strip steel changes the stresses on its upper and lower surfaces. The formula is as follows:

[0099]

[0100] After calculation:

[0101] In step S5, adjust the heights of the anti-vibration roller and the anti-wrinkle roller to Measure the camber value h of the strip steel after adjustment q ′ = 4.2 mm, h q ′ < 5 mm holds, and the adjustment is completed.

[0102] The above content is only used to illustrate the technical solution of the present invention. Any simple modification or equivalent replacement made by those of ordinary skill in the art to the technical solution of the present invention shall not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A method for treating C warping during leveling, characterized in that: The steps include: S1: Obtaining process parameters during strip leveling; S2: According to the process parameters in the strip flattening process, the difference in the extension amount between the upper and lower surfaces of the strip in the width direction ΔB, the difference in the extension amount between the upper and lower surfaces of the strip in the length direction Δl; the stress difference between the upper and lower surfaces of the strip Δσ; S3: According to the C warping type, the difference in the extension of the upper and lower surfaces of the strip in the width direction ΔB, the difference in the extension of the upper and lower surfaces of the strip in the length direction Δl; the stress difference Δσ between the upper and lower surfaces of the strip, the wrap angle α to be adjusted between the anti-trembling roller and the anti-wrinkle roller is calculated. fz , α fc ; S4: According to the wrap angle α of the anti-trembling roller and the anti-wrinkle roller to be adjusted fz , α fc , adjust the height of the anti-trembling roller and the anti-wrinkle roller, so that the strip changes the stress on the upper and lower surfaces; S5: After measuring and adjusting the height of the anti-trembling roller and the anti-wrinkle roller, the warpage value h of the strip steel q ′, judge whether it meets h q ′<h q0 , where h q0 is the set C tilt value; when h q ′<h q0 , then the governance ends, when h q ′≥h q0 , then return to S2 and continue to adjust the warping value of the strip.

2. The method for treating C warping during leveling according to claim 1, characterized in that: The process parameters of the strip leveling process include the height H of the anti-wrinkle roller fz , Anti-vibration roller height H fc 、Anti-wrinkle roller wrap angle α fz , Anti-vibration roller wrap angle α fc , the friction coefficient of the upper and lower surfaces of the strip μ, the warpage type and warpage value h at the exit of the leveling unit q , working roll radius R, strip thickness before leveling h0, strip thickness after leveling h1, strip width before leveling B, front tension T0 during leveling rolling and rear tension T1 during leveling rolling.

3. The method for treating C warping during leveling according to claim 1, characterized in that: The difference ΔB between the extension of the upper and lower surfaces in the width direction of the strip is calculated according to the central angle α of the geometric curve. c , the thickness h1 of the strip after leveling is determined.

4. The method for treating C warping during leveling according to claim 1, characterized in that: The strip rolling zone length l is determined according to the working roll radius R, the strip thickness before leveling h0, and the strip thickness after leveling h1.

5. The method for treating C warping during leveling according to claim 1, characterized in that: The difference Δl between the extension amounts of the upper and lower surfaces of the strip in the length direction is determined based on the strip width B before leveling, the difference ΔB between the extension amounts of the upper and lower surfaces in the strip width direction, the strip thickness h0 before leveling, the strip thickness h1 after leveling and the strip rolling area length l.

6. The method for treating C warping during leveling according to claim 1, characterized in that: The stress difference Δσ between the upper and lower surfaces of the steel strip is determined according to the difference Δl between the elongation of the upper and lower surfaces of the steel strip, the length l of the rolling zone of the steel strip, and the Poisson's ratio v of the steel strip.

7. The method for treating C warping during leveling according to claim 1, characterized in that: The wrap angle α' of the anti-vibration roller after adjustment fz 、The wrap angle α' after the anti-wrinkle roller is adjusted fc According to the warpage type at the exit of the skin-pass unit, based on the anti-wrinkle roller wrap angle α fz , Anti-vibration roller wrap angle α fc , the adjustment amount Δα of the wrap angle is determined.

8. A device for treating C warping during leveling, characterized in that: include: Acquisition module: used to obtain process parameters during strip leveling; Calculation module I: According to the process parameters in the strip flattening process, the difference ΔB between the extension of the upper and lower surfaces of the strip in the width direction, the difference Δl between the extension of the upper and lower surfaces of the strip in the length direction, and the stress difference Δσ between the upper and lower surfaces of the strip are calculated; Calculation module II: used to calculate the wrap angle α to be adjusted between the anti-vibration roller and the anti-wrinkle roller according to the C-warping type, the difference ΔB between the upper and lower surface extensions of the strip in the width direction, the difference Δl between the upper and lower surface extensions of the strip in the length direction, and the stress difference Δσ between the upper and lower surfaces of the strip. fz , α fc ; Adjustment module: used to adjust the wrap angle α of the anti-vibration roller and the anti-wrinkle roller fz , α fc , adjust the height of the anti-trembling roller and the anti-wrinkle roller, so that the strip changes the stress on the upper and lower surfaces; Judgment module: used to measure the warpage value h of the strip after adjusting the height of the anti-trembling roller and the anti-wrinkle roller q ′, judge whether it meets h q ′<h q0 , where h q0 is the set C tilt value; when h q ′<h q0 , then the governance ends, when h q ′≥h q0 , it returns to calculation module I to continue adjusting the warpage value of the strip.

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