Method and device for straightening a medium wave plate-shaped straightener

Abstract

The application discloses a kind of middle wave plate shape straightening machine straightening control method and device, wherein the method includes: obtaining the pressure of the first straightening roll in upper row and the pressure of the last straightening roll in upper row, determining the pressure of the rest straightening roll except edge roll in upper row and the pressure of the rest straightening roll except edge roll in lower row, according to the relationship between the pressure of straightening roll and bending deflection, and the pressure of each straightening roll, determine the bending deflection of each straightening roll;The relationship between bending curvature and bending deflection is constructed, the relationship between bending curvature and the pressure of straightening roll is determined;According to the relationship between bending curvature and the pressure of straightening roll, and the pressure of each straightening roll, determine the bending curvature of each straightening roll;Compare the bending curvature of each straightening roll, according to the comparison result, determine the roll shape of straightening roll and carry out straightening control, the application can make the straightening machine without bending roll regulation and control ability have certain control ability of middle wave plate shape, improve the effect of middle wave control.

Description

Technical Field

[0001] This invention relates to the field of sheet metal shape control technology, and in particular to a straightening control method and device for straightening a sheet metal straightener with a medium wave shape. Background Technology

[0002] This section is intended to provide background or context for the embodiments of the invention set forth in the claims. The description herein is not an admission that it is prior art simply because it is included in this section.

[0003] Cold straightening has a significant impact on the final quality of medium and heavy plates. It is the primary means of correcting plate shape defects after cooling. In the production of medium and heavy plates, roller straighteners are commonly used to improve various plate shape defects and eliminate residual stress. The core factors determining the straightening effect of the straightener are twofold: a reasonable roller system structure and a straightening model. For waviness straightening, applying bending rollers becomes the main method of roller straighteners, generally divided into positive and negative bending rollers. Negative bending rollers are needed for medium waviness defects, causing the straightening rollers to deflect during operation. This improves the uneven longitudinal fiber distribution in the width direction of the plate, thereby improving the waviness defect of the medium and heavy plate. The effectiveness of waviness straightening is mainly affected by the amount of bending rollers. For medium and heavy plates with severe waviness defects, simply adjusting the amount of bending rollers may not be sufficient to improve the uneven longitudinal fiber distribution, resulting in unsatisfactory straightening effects. Furthermore, for cases where bending rollers cannot solve the waviness defect, straighteners without bending roller capabilities cannot control the waviness. Summary of the Invention

[0004] This invention provides a straightening control method for a straightening machine with a corrugated shape, used to specifically configure the shape of the straightening rollers, thereby enabling a straightening machine that lacks bending roller adjustment capability to have a certain control capability for the corrugated shape, improving the corrugation control effect. The straightening machine includes multiple upper row straightening rollers and multiple lower row straightening rollers. The straightening control method for the straightening machine includes:

[0005] Obtain the pressing amount of the first and last straightening rollers in the upper row. Based on the pressing amount of the first and last straightening rollers in the upper row, determine the pressing amount of the remaining straightening rollers in the upper and lower rows (excluding the side rollers). Based on the relationship between the pressing amount of the straightening rollers and the bending deflection, and the pressing amount of each straightening roller, determine the bending deflection of each straightening roller.

[0006] Based on the bending deflection of each straightening roller and the relationship between bending deflection and bending radius, the relationship between bending deflection and bending curvature is constructed. Based on the relationship between bending deflection and bending curvature, and the relationship between the pressing amount of the straightening roller and bending deflection, the relationship between bending curvature and the pressing amount of the straightening roller is determined.

[0007] Based on the relationship between the curvature and the reduction of the straightening roller, and the reduction of each straightening roller, the curvature of each straightening roller is determined.

[0008] Compare the curvature of each straightening roller, determine the roller shape of the straightening roller based on the comparison results, and straighten and control the shape of the corrugated plate based on the roller shape of the straightening roller.

[0009] This invention also provides a straightening control device for a straightening machine with a corrugated plate shape, used to specifically configure the shape of the straightening rollers, thereby enabling a straightening machine that lacks bending roller adjustment capability to have a certain control capability for the corrugated plate shape, improving the corrugation control effect. The straightening machine includes multiple upper row straightening rollers and multiple lower row straightening rollers, and the straightening control device for the straightening machine includes:

[0010] The bending deflection determination module is used to obtain the pressing amount of the first straightening roller and the last straightening roller in the upper row. Based on the pressing amount of the first straightening roller and the last straightening roller in the upper row, the pressing amount of the remaining straightening rollers in the upper row (excluding the side rollers) and the pressing amount of the remaining straightening rollers in the lower row (excluding the side rollers) are determined. Based on the relationship between the pressing amount of the straightening rollers and the bending deflection, and the pressing amount of each straightening roller, the bending deflection of each straightening roller is determined.

[0011] The module for determining the relationship between bending curvature and straightening roll reduction is used to construct the relationship between bending deflection and bending curvature based on the bending deflection of each straightening roll and the relationship between bending deflection and bending radius. Based on the relationship between bending deflection and bending curvature, and the relationship between the reduction of straightening roll and bending deflection, the module determines the relationship between bending curvature and the reduction of straightening roll.

[0012] The bending curvature determination module is used to determine the bending curvature of each straightening roller based on the relationship between the bending curvature and the pressing amount of the straightening roller, as well as the pressing amount of each straightening roller.

[0013] The mid-wave plate straightening control module is used to compare the curvature of each straightening roller, determine the roller shape of the straightening roller based on the comparison results, and perform straightening control on the mid-wave plate shape based on the roller shape of the straightening roller.

[0014] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described straightening control method for a wave-shaped straightening machine.

[0015] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described straightening control method for a wave-shaped straightening machine.

[0016] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described straightening control method for a straightening machine with a wave-shaped profile.

[0017] In this embodiment of the invention, by obtaining the reduction amount of the first and last straightening rollers in the upper row, the reduction amounts of the remaining straightening rollers (excluding the side rollers in the upper and lower rows) are determined based on these amounts. The bending deflection of each straightening roller is determined based on the relationship between the reduction amount and the bending deflection, and the reduction amount of each straightening roller. Based on the bending deflection of each straightening roller and the relationship between bending deflection and bending radius, a relationship between bending deflection and bending curvature is constructed. The relationship between bending curvature and the relationship between the pressing amount of the straightening roller and the bending deflection are investigated to determine the relationship between bending curvature and the pressing amount of the straightening roller. Based on the relationship between bending curvature and the pressing amount of the straightening roller, and the pressing amount of each straightening roller, the bending curvature of each straightening roller is determined. The bending curvature of each straightening roller is compared, and the roller shape of the straightening roller is determined based on the comparison results. The straightening control of the corrugated plate shape is performed based on the roller shape of the straightening roller. The roller shape of the straightening roller can be configured in a targeted manner, so that the straightening machine that does not have the ability to adjust the bending roller has a certain control ability of the corrugated plate shape, thereby improving the corrugated plate control effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0019] Figure 1 This is a flowchart of the straightening control method for a wave-shaped straightening machine in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the pressing adjustment scheme of the fully hydraulic roller straightener in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram illustrating the relationship between bending radius and bending deflection in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the straightening roller arrangement of the nine-roller straightener in an embodiment of the present invention;

[0023] Figure 5 The second and fifth straightening rollers in this embodiment of the invention are for the sheet material with a large waviness.

[0024] Figure 6 The shape of the 3rd and 4th straightening rollers for the plate with large waviness in the embodiment of the present invention;

[0025] Figure 7 The second and fifth straightening rollers in this embodiment of the invention are of medium corrugation.

[0026] Figure 8 The third and fourth straightening rollers of the plate with moderate waviness in the embodiment of the present invention;

[0027] Figure 9 The second and fifth straightening rollers in this embodiment of the invention are for plates with smaller waviness.

[0028] Figure 10 The third and fourth straightening rollers in this embodiment of the invention are for plates with smaller waviness.

[0029] Figure 11 This is a schematic diagram of the straightening control device of the wave-shaped straightening machine in an embodiment of the present invention. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0031] Figure 1 This is a flowchart of a straightening control method for a wave-shaped straightening machine in an embodiment of the present invention. The method includes:

[0032] Step 101: Obtain the pressing amount of the first straightening roller and the last straightening roller in the upper row. Based on the pressing amount of the first straightening roller and the last straightening roller in the upper row, determine the pressing amount of the remaining straightening rollers in the upper row (excluding the side rollers) and the pressing amount of the remaining straightening rollers in the lower row. Based on the relationship between the pressing amount of the straightening rollers and the bending deflection, and the pressing amount of each straightening roller, determine the bending deflection of each straightening roller.

[0033] Step 102: Based on the bending deflection of each straightening roller and the relationship between bending deflection and bending radius, construct the relationship between bending deflection and bending curvature. Based on the relationship between bending deflection and bending curvature, and the relationship between the pressing amount of the straightening roller and bending deflection, determine the relationship between bending curvature and the pressing amount of the straightening roller.

[0034] Step 103: Determine the bending curvature of each straightening roller based on the relationship between the bending curvature and the pressing amount of each straightening roller, as well as the pressing amount of each straightening roller.

[0035] Step 104: Compare the curvature of each straightening roller, determine the roller shape of the straightening roller based on the comparison results, and straighten and control the shape of the corrugated plate based on the roller shape of the straightening roller.

[0036] Each step is explained in detail below.

[0037] In step 101, the pressing amount of the first straightening roller and the last straightening roller in the upper row are obtained. Based on the pressing amount of the first straightening roller and the last straightening roller in the upper row, the pressing amount of the remaining straightening rollers in the upper row (excluding the side rollers) and the pressing amount of the remaining straightening rollers in the lower row (excluding the side rollers) are determined. Based on the relationship between the pressing amount of the straightening rollers and the bending deflection, and the pressing amount of each straightening roller, the bending deflection of each straightening roller is determined.

[0038] In one embodiment, the straightening machine is a nine-roll straightening machine.

[0039] In a specific embodiment, the pressing adjustment scheme for a fully hydraulic roller straightener involves adjusting the overall tilt of the upper row of straightening rollers, such as... Figure 2 As shown.

[0040] According to commonly used straightening strategies, the pressing amount setting process is as follows: First, the pressing amount of the inlet and outlet straightening rollers needs to be determined. The inlet straightening roller is the first straightening roller in the upper roller system, represented by the symbol δ2. The outlet straightening roller is the last straightening roller in the upper roller system, represented by the symbol δ8. Let k be the ratio of the pressing amount of the first roller in the upper row to the pressing amount of the tail roller. It is usually greater than 1, that is, k = δ2 / δ8. k can reflect the overall tilt of the upper row of straightening rollers. The larger the value, the greater the tilt.

[0041] After determining δ2 and δ8, the reduction of the remaining straightening rollers in the upper row is calculated, which can be considered according to the principle of linear distribution. In one embodiment, based on the reduction of the first straightening roller in the upper row and the reduction of the last straightening roller in the upper row, the reduction of the remaining straightening rollers in the upper row (excluding the side rollers) and the reduction of the remaining straightening rollers in the lower row (excluding the side rollers) are determined, including:

[0042] Calculate the reduction of the straightening rollers (excluding the side rollers) using the following formula:

[0043]

[0044]

[0045] Where, k = δ2 / δ8, δ2 is the amount of pressure applied to the first straightening roller in the upper row with straightening roller number 2, δ4 is the amount of pressure applied to the second straightening roller in the upper row with straightening roller number 4, δ6 is the amount of pressure applied to the third straightening roller in the upper row with straightening roller number 6, and δ8 is the amount of pressure applied to the fourth straightening roller in the upper row with straightening roller number 8.

[0046] For the lower row of straightening rolls, excluding the side rolls, although the other straightening rolls do not provide a reduction amount, they are considered to have a relative reduction amount. The reduction amount of the remaining straightening rolls (excluding the side rolls) is calculated using the following formula:

[0047]

[0048]

[0049]

[0050] Wherein, δ3 is the pressing amount of the second straightening roller in the lower row of straightening roller number 3, δ5 is the pressing amount of the third straightening roller in the lower row of straightening roller number 5, and δ7 is the pressing amount of the fourth straightening roller in the lower row of straightening roller number 7.

[0051] The side rollers of the straightener, namely the first and last straightening rollers in the lower row, can generally be considered not to provide any reduction. That is, δ1 = δ9 = 0.

[0052] In one embodiment, determining the bending deflection of each straightening roller based on the relationship between the pressing amount of the straightening roller and the bending deflection, and the pressing amount of each straightening roller, includes:

[0053] Calculate the bending deflection of each straightening roller using the following formula:

[0054]

[0055] Where i is the number of the straightening roller, υ i δ represents the bending deflection of each straightening roller. i This represents the reduction amount of each straightening roller.

[0056] In step 102, based on the bending deflection of each straightening roller and the relationship between bending deflection and bending radius, the relationship between bending deflection and bending curvature is constructed. Based on the relationship between bending deflection and bending curvature, and the relationship between the pressing amount of the straightening roller and bending deflection, the relationship between bending curvature and the pressing amount of the straightening roller is determined.

[0057] In a specific embodiment, the relationship between bending curvature and the reduction amount of the straightening roller is established using the intermediate variable bending deflection. The above process has established the relationship between bending deflection and the reduction amount of the straightening roller. Based on this relationship, the solution relationship between bending curvature and reduction amount is then obtained. During the straightening process, the deformation of the steel plate can be simplified as follows: Figure 3 As shown.

[0058] In one embodiment, the relationship between bending deflection and bending curvature is constructed based on the bending deflection of each straightening roller and the relationship between bending deflection and bending radius, including:

[0059] The relationship between bending deflection and bending curvature can be constructed using the following formula:

[0060]

[0061] Among them, A i For the curvature, ρ i Where is the bending radius, (Constructed based on the geometric relationship between triangles); l is the roller spacing of the straightening roller, and X is an intermediate variable;

[0062] Based on the relationship between bending deflection and bending curvature, and the relationship between the pressing amount of the straightening roller and bending deflection, the relationship between bending curvature and the pressing amount of the straightening roller is determined, including:

[0063] The relationship between the bending curvature and the reduction of the straightening roller is determined using the following formula:

[0064]

[0065] In step 103, the bending curvature of each straightening roller is determined based on the relationship between the bending curvature and the pressing amount of the straightening roller, as well as the pressing amount of each straightening roller.

[0066] In step 104, the curvature of each straightening roller is compared, the roller shape of the straightening roller is determined based on the comparison results, and the straightening control of the corrugated plate shape is performed based on the roller shape of the straightening roller.

[0067] In one embodiment, comparing the curvature of each straightening roller and determining the roller shape based on the comparison results includes:

[0068] Compare the magnitude of the bending curvature of each straightening roll, and determine the waviness control amount of the straightening roll based on the comparison results;

[0069] The roll shape of the straightening roll is determined based on the control amount of the waviness of the straightening roll.

[0070] In one embodiment, determining the straightening roller waviness control amount based on the comparison results includes:

[0071] The minimum value of the straightening roller waviness control amount is calculated using the following formula:

[0072] C min =k1C max ;

[0073] Where k1 is the curvature ratio between the straightening rollers. A max1 The curvature of the straightening roller with the largest bending curvature, A max2 The curvature of the straightening roller with the second largest bending curvature, A mid1 The curvature of the straightening roller with the third largest bending curvature, A mid2The curvature of the straightening roller with the fourth largest bending curvature; C min C is the minimum value of the straightening roller waviness control amount. max The maximum value of the straightening roller waviness control amount is determined by considering the actual degree of waviness.

[0074] In a specific embodiment, the curvature of the bending at different rollers varies during the straightening process. The curvatures are then compared, and the control capability for the mid-wave curvature is determined based on the proportion of the curvature magnitudes, as shown below:

[0075] A max1 >A max2 >A mid1 >A mid2 >A min1 >A min2 >A min3 ;

[0076] In the formula, A max1 A max2 The curvature at the two rollers with the largest bending curvature, m -1 A mid1 A mid2 The curvature at the two rollers with the second-highest curvature, m -1 A min1 A min2 A min3 m is the curvature at the point where the bending curvature is smaller. -1 .

[0077] Since the goal of wave control is to ensure that the elongation in the middle of the sheet is less than that at the edges, a roller shape scheme with a certain degree of concavity is adopted. For the first two straightening rollers with larger curvature, to avoid excessive wave control, their roller shape concavity is set to a smaller value, denoted by C. min The two straightening rollers with the next lower curvature should fully utilize their wave control capabilities; therefore, their roller concavity should be a larger value, denoted by the symbol C. max This indicates that the shape of other straightening rollers will not be adjusted.

[0078] Among them, C max The value should be determined based on the actual wave severity. For example, 0.6mm is used when the waves are relatively severe, 0.4mm is used when the waves are less severe, and 0.2mm is used when the waves are relatively small. C min The value of can be determined by the curvature ratio k1 between the straightening rollers, as shown in the following formula:

[0079] C min =k1C max ;

[0080]

[0081] In the formula, k1 is the bending curvature ratio between the straightening rollers;

[0082] Given C max In this case, the following roller shape formula is adopted, and the straightening roller adopts a symmetrical roller shape:

[0083]

[0084] In the formula, y i (x1) represents the radius of each straightening roller, in mm;

[0085] R is the initial radius of the straightening roller, in mm;

[0086] a i These are the parameters for the straightening roller profile;

[0087] x i Here are the coordinates of the straightening roller body, in mm, ranging from [0, b];

[0088] b is the length of the roller body, in mm;

[0089] α i The half-angle of the roller base curve is taken as 5π / 12rad.

[0090] As described above, given the roller shape determination method for the straightening machine, based on the known roller body length b and the initial radius R of the straightening roller, and with a given straightening roller waviness control value C, the roller shape parameter a is obtained according to the following formula. max and a min :

[0091]

[0092]

[0093] The following example uses a plate with an inlet pressure reduction of 2.2mm and an outlet pressure reduction of 0.2mm and a large waviness to illustrate the straightening control scheme of a nine-roll straightener.

[0094] (1) Determine the relative reduction amount for straightening.

[0095] The layout of a certain nine-roll straightener is as follows: Figure 4 As shown. The adjustment scheme involves adjusting the overall tilt of the upper row of straightening rollers. Here, we take δ2 = 2.2mm, δ8 = 0.2mm, then k = 11, and the pressing amount of the first and last rollers of the lower row is δ1 = δ9 = 0. The relative pressing amount of each roller is:

[0096] δ1 = 0;

[0097] δ2=kδ8=11×0.2=2.2mm;

[0098]

[0099]

[0100]

[0101]

[0102]

[0103] δ8 = 0.2 mm;

[0104] δ9=0;

[0105] (2) Determine the bending curvature by relative reduction.

[0106] The roller spacing of a certain nine-roll straightener varies, such as... Figure 4 As shown, the roller gap between the upper and lower rollers is 240mm, and the roller gap at the edge of the lower roller is 310mm. According to formula (11), the straightening curvature of the plate at each roller is:

[0107]

[0108]

[0109]

[0110]

[0111]

[0112]

[0113]

[0114] (3) Sort the bending curvature of each roller and determine the shape and configuration of the straightening roller.

[0115] The following formula shows the arrangement of the sheet metal curvature at each straightening roller from largest to smallest:

[0116] A3>A4>A2>A5>A6>A7>A8

[0117] Since the goal of wave control is to ensure that the elongation in the middle of the sheet is less than that at the edges, a roller shape scheme with a certain degree of concavity is adopted. For the first two straightening rollers with larger curvature, to avoid excessive wave control, their roller shape concavity is set to a smaller value, denoted by C. min The two straightening rollers with the second lowest curvature should fully utilize their wave control capabilities; therefore, their roller concavity should be a larger value, denoted by the symbol C. max express.

[0118] like Figure 4 As shown, assuming severe wave behavior in reality, the wave control capabilities of rollers 2 and 5 should be fully utilized, and the roller concavity value C should be taken. max =0.6mm, then from equations (13) and (14), the roll concavity values ​​of the 3rd and 4th rolls can be obtained:

[0119]

[0120] The half-angle of the straightening roll profile curve is 5π / 12. The roll profile parameters of different straightening rolls are obtained according to the following formulas:

[0121]

[0122]

[0123] The nine-roll straightener has an initial roller radius R = 105 mm and a roller body length b = 4200 mm. Each straightener roller can be defined by a roller profile curve.

[0124] Straightening rollers No. 2 and No. 5:

[0125]

[0126] Straightening rollers No. 3 and No. 4:

[0127]

[0128] Straightening roller profile curve as follows Figure 5 and Figure 6 As shown.

[0129] The following example uses a plate with an inlet pressure of 1.8mm, an outlet pressure of 0.2mm, and moderate waviness to illustrate the straightening control scheme of a nine-roll straightener.

[0130] (1) Determine the relative reduction amount for straightening.

[0131] The layout of a certain nine-roll straightener is as follows: Figure 3 As shown. The adjustment scheme involves tilting the upper row of straightening rollers as a whole. Here, we take δ2 = 1.8mm, δ8 = 0.2mm, then k = 9, and the pressing amount of the first and last rollers of the lower row is δ1 = δ9 = 0. The relative pressing amount of each roller is:

[0132] δ1 = 0;

[0133] δ2=kδ8=9×0.2=1.8mm;

[0134]

[0135]

[0136]

[0137]

[0138]

[0139] δ8 = 0.2 mm;

[0140] δ9=0;

[0141] (2) Determine the curvature of the bend by the relative reduction.

[0142] The roller spacing of a certain nine-roll straightener varies. The roller spacing between the upper and lower rollers is 240mm, and the roller spacing at the edge of the lower rollers is 310mm. The straightening curvature of the sheet material at each roller is:

[0143]

[0144]

[0145]

[0146]

[0147]

[0148]

[0149]

[0150] (3) Sort the curvature of each roller and determine the shape and configuration of the straightening roller.

[0151] The following formula shows the arrangement of the sheet metal curvature at each straightening roller from largest to smallest:

[0152] A3>A4>A2>A5>A6>A7>A8

[0153] Since the goal of wave control is to ensure that the elongation in the middle of the sheet is less than that at the edges, a roller shape scheme with a certain degree of concavity is adopted. For the first two straightening rollers with larger curvature, to avoid excessive wave control, their roller shape concavity is set to a smaller value, denoted by C. min The two straightening rollers with the second lowest curvature should fully utilize their wave control capabilities; therefore, their roller concavity should be a larger value, denoted by the symbol C. max express.

[0154] Assuming severe wave conditions in reality, the wave control capabilities of rollers 2 and 5 should be fully utilized, and the roller concavity value C should be taken. max =0.4mm, then the roll concavity values ​​of rollers 3 and 4 are:

[0155]

[0156] The half-angle of the straightening roll profile curve is 5π / 12, and the roll profile parameters of different straightening rolls are obtained:

[0157]

[0158]

[0159] The nine-roll straightener has an initial roller radius R = 105 mm and a roller body length b = 4200 mm. Each straightener roller can be defined by a roller profile curve.

[0160] Straightening rollers No. 2 and No. 5:

[0161]

[0162] Straightening rollers No. 3 and No. 4:

[0163]

[0164] Straightening roller profile curve as follows Figure 7 and Figure 8 As shown.

[0165] The following example uses a plate with an inlet pressure reduction of 1.6mm, an outlet pressure reduction of 0.2mm, and a small waviness to illustrate the straightening control scheme of a nine-roll straightener.

[0166] (1) Determine the relative reduction amount for straightening

[0167] The layout of a certain nine-roll straightener is as follows: Figure 4 As shown. The adjustment scheme involves tilting the upper row of straightening rollers as a whole. Here, we take δ2 = 1.5mm, δ8 = 0.2mm, then k = 7.5, and the reduction of the first and last rollers of the lower row is δ1 = δ9 = 0. The relative reduction of each roller is:

[0168] δ1=0

[0169] δ2=kδ8=7.5×0.2=1.5mm

[0170]

[0171]

[0172]

[0173]

[0174]

[0175] δ8=0.2mm

[0176] δ9=0

[0177] (2) Determine the curvature of the bend by the relative reduction.

[0178] The roller gap between the upper and lower rollers is 240mm, and the roller gap at the edge of the lower roller is 310mm. The straightening curvature of the sheet material at each roller is:

[0179]

[0180]

[0181]

[0182]

[0183]

[0184]

[0185]

[0186] (3) Sort the curvature of each roller and determine the shape and configuration of the straightening roller.

[0187] The following formula shows the arrangement of the sheet metal curvature at each straightening roller from largest to smallest:

[0188] A3>A4>A2>A5>A6>A7>A8

[0189] Since the goal of wave control is to ensure that the elongation in the middle of the sheet is less than that at the edges, a roller shape scheme with a certain degree of concavity is adopted. For the first two straightening rollers with larger curvature, to avoid excessive wave control, their roller shape concavity is set to a smaller value, denoted by C. min The two straightening rollers with the second lowest curvature should fully utilize their wave control capabilities; therefore, their roller concavity should be a larger value, denoted by the symbol C. max express.

[0190] Assuming severe wave conditions in reality, the wave control capabilities of rollers 2 and 5 should be fully utilized, and the roller concavity value C should be taken. max =0.2mm, then from equations (13) and (14), the roll concavity values ​​of the 3rd and 4th rolls can be obtained:

[0191]

[0192] The half-angle of the straightening roll profile curve is 5π / 12, and the roll profile parameters of different straightening rolls are obtained:

[0193]

[0194]

[0195] The initial radius of the straightening rollers in this nine-roll cold straightener is R = 105 mm, and the roller body length is b = 4200 mm. Each straightening roller can be defined by a roller profile curve:

[0196] Straightening rollers No. 2 and No. 5:

[0197]

[0198] Straightening rollers No. 3 and No. 4:

[0199]

[0200] Straightening roller profile curve as follows Figure 9 and Figure 10 As shown.

[0201] This invention also provides a straightening control device for a wave-shaped straightening machine, as described in the following embodiments. Since the principle by which this device solves the problem is similar to the straightening control method for a wave-shaped straightening machine, the implementation of this device can refer to the implementation of the straightening control method for a wave-shaped straightening machine; repeated details will not be elaborated further. Figure 11 As shown, the device includes:

[0202] The bending deflection determination module 110 is used to obtain the pressing amount of the first straightening roller and the last straightening roller in the upper row, and to determine the pressing amount of the remaining straightening rollers in the upper row (excluding the side rollers) and the pressing amount of the remaining straightening rollers in the lower row (excluding the side rollers) based on the pressing amount of the first straightening roller and the pressing amount of the last straightening roller in the upper row. Based on the relationship between the pressing amount of the straightening rollers and the bending deflection, and the pressing amount of each straightening roller, the bending deflection of each straightening roller is determined.

[0203] The module 111 for determining the relationship between bending curvature and straightening roll reduction is used to construct the relationship between bending deflection and bending curvature based on the bending deflection of each straightening roll and the relationship between bending deflection and bending radius, and to determine the relationship between bending curvature and straightening roll reduction based on the relationship between bending deflection and bending curvature and the relationship between straightening roll reduction and bending deflection.

[0204] The bending curvature determination module 112 is used to determine the bending curvature of each straightening roller based on the relationship between the bending curvature and the pressing amount of the straightening roller, as well as the pressing amount of each straightening roller.

[0205] The mid-wave plate shape straightening control module 113 is used to compare the curvature of each straightening roller, determine the roller shape of the straightening roller based on the comparison result, and perform straightening control on the mid-wave plate shape based on the roller shape of the straightening roller.

[0206] In one embodiment, the straightening machine is a nine-roll straightening machine.

[0207] In one embodiment, the bending deflection determination module 110 is specifically used for:

[0208] Calculate the reduction of the straightening rollers (excluding the side rollers) using the following formula:

[0209]

[0210]

[0211] Where, k = δ2 / δ8, δ2 is the amount of pressure applied to the first straightening roller in the upper row with straightening roller number 2, δ4 is the amount of pressure applied to the second straightening roller in the upper row with straightening roller number 4, δ6 is the amount of pressure applied to the third straightening roller in the upper row with straightening roller number 6, and δ8 is the amount of pressure applied to the fourth straightening roller in the upper row with straightening roller number 8.

[0212] Calculate the reduction of the straightening rollers (excluding the side rollers) using the following formula:

[0213]

[0214]

[0215]

[0216] Wherein, δ3 is the pressing amount of the second straightening roller in the lower row of straightening roller number 3, δ5 is the pressing amount of the third straightening roller in the lower row of straightening roller number 5, and δ7 is the pressing amount of the fourth straightening roller in the lower row of straightening roller number 7.

[0217] In one embodiment, the bending deflection determination module 110 is specifically used for:

[0218] Calculate the bending deflection of each straightening roller using the following formula:

[0219]

[0220] Where i is the number of the straightening roller, υ i δ represents the bending deflection of each straightening roller. i This represents the reduction amount of each straightening roller.

[0221] In one embodiment, the module 111 for determining the relationship between bending curvature and the reduction amount of the straightening roller is specifically used for:

[0222] The relationship between bending deflection and bending curvature can be constructed using the following formula:

[0223]

[0224] Among them, A iFor the curvature, ρ i Where is the bending radius, l is the pitch of the straightening roll, and X is an intermediate variable;

[0225] The module for determining the relationship between bending curvature and the reduction amount of the straightening roller is specifically used for:

[0226] The relationship between the bending curvature and the reduction of the straightening roller is determined using the following formula:

[0227]

[0228] In one embodiment, the wave plate straightening control module 113 is specifically used for:

[0229] Compare the magnitude of the bending curvature of each straightening roll, and determine the waviness control amount of the straightening roll based on the comparison results;

[0230] The roll shape of the straightening roll is determined based on the control amount of the waviness of the straightening roll.

[0231] In one embodiment, the wave plate straightening control module 113 is specifically used for:

[0232] The minimum value of the straightening roller waviness control amount is calculated using the following formula:

[0233] C min =k1C max ;

[0234] Where k1 is the curvature ratio between the straightening rollers. A max1 The curvature of the straightening roller with the largest bending curvature, A max2 The curvature of the straightening roller with the second largest bending curvature, A mid1 The curvature of the straightening roller with the third largest bending curvature, A mid2 The curvature of the straightening roller with the fourth largest bending curvature; C min C is the minimum value of the straightening roller waviness control amount. max The maximum value of the straightening roller waviness control amount is determined by considering the actual degree of waviness.

[0235] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described straightening control method for a wave-shaped straightening machine.

[0236] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described straightening control method for a wave-shaped straightening machine.

[0237] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described straightening control method for a straightening machine with a wave-shaped profile.

[0238] In this embodiment of the invention, by obtaining the reduction amount of the first and last straightening rollers in the upper row, the reduction amounts of the remaining straightening rollers (excluding the side rollers in the upper and lower rows) are determined based on these amounts. The bending deflection of each straightening roller is determined based on the relationship between the reduction amount and the bending deflection, and the reduction amount of each straightening roller. Based on the bending deflection of each straightening roller and the relationship between bending deflection and bending radius, a relationship between bending deflection and bending curvature is constructed. The relationship between bending curvature and the relationship between the pressing amount of the straightening roller and the bending deflection are investigated to determine the relationship between bending curvature and the pressing amount of the straightening roller. Based on the relationship between bending curvature and the pressing amount of the straightening roller, and the pressing amount of each straightening roller, the bending curvature of each straightening roller is determined. The bending curvature of each straightening roller is compared, and the roller shape of the straightening roller is determined based on the comparison results. The straightening control of the corrugated plate shape is performed based on the roller shape of the straightening roller. The roller shape of the straightening roller can be configured in a targeted manner, so that the straightening machine that does not have the ability to adjust the bending roller has a certain control ability of the corrugated plate shape, thereby improving the corrugated plate control effect.

[0239] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0240] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0241] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0242] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0243] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A straightening control method for a straightening machine with a wave-shaped plate, characterized in that, The straightening machine includes multiple upper row straightening rollers and multiple lower row straightening rollers, and the straightening control method of the straightening machine includes: Obtain the pressing amount of the first and last straightening rollers in the upper row. Based on the pressing amount of the first and last straightening rollers in the upper row, determine the pressing amount of the remaining straightening rollers in the upper and lower rows (excluding the side rollers). Based on the relationship between the pressing amount of the straightening rollers and the bending deflection, and the pressing amount of each straightening roller, determine the bending deflection of each straightening roller. Based on the bending deflection of each straightening roller and the relationship between bending deflection and bending radius, the relationship between bending deflection and bending curvature is constructed. Based on the relationship between bending deflection and bending curvature, and the relationship between the pressing amount of the straightening roller and bending deflection, the relationship between bending curvature and the pressing amount of the straightening roller is determined. Based on the relationship between the curvature and the reduction of the straightening roller, and the reduction of each straightening roller, the curvature of each straightening roller is determined. Compare the curvature of each straightening roller, determine the roller shape of the straightening roller based on the comparison results, and straighten the shape of the corrugated plate according to the roller shape of the straightening roller; The straightening machine is a nine-roll straightening machine; Based on the reduction amount of the first and last straightening rollers in the upper row, determine the reduction amounts of the remaining straightening rollers (excluding the side rollers) in the upper and lower rows, including: Calculate the reduction of the straightening rollers (excluding the side rollers) using the following formula: Where, k = δ2 / δ8, δ2 is the amount of pressure applied to the first straightening roller in the upper row with straightening roller number 2, δ4 is the amount of pressure applied to the second straightening roller in the upper row with straightening roller number 4, δ6 is the amount of pressure applied to the third straightening roller in the upper row with straightening roller number 6, and δ8 is the amount of pressure applied to the fourth straightening roller in the upper row with straightening roller number 8. Calculate the reduction of the straightening rollers (excluding the side rollers) using the following formula: Wherein, δ3 is the amount of pressure applied to the second straightening roller in the lower row of straightening roller number 3, δ5 is the amount of pressure applied to the third straightening roller in the lower row of straightening roller number 5, and δ7 is the amount of pressure applied to the fourth straightening roller in the lower row of straightening roller number 7. Based on the relationship between the reduction amount of the straightening rollers and the bending deflection, and the reduction amount of each straightening roller, the bending deflection of each straightening roller is determined, including: Calculate the bending deflection of each straightening roller using the following formula: Where i is the number of the straightening roller, υ i δ represents the bending deflection of each straightening roller. i This refers to the amount of pressure applied to each straightening roller; Based on the bending deflection of each straightening roller and the relationship between bending deflection and bending radius, the relationship between bending deflection and bending curvature is constructed, including: The relationship between bending deflection and bending curvature can be constructed using the following formula: Among them, A i For the curvature, ρ i Where is the bending radius, l is the pitch of the straightening roll, and X is an intermediate variable; Based on the relationship between bending deflection and bending curvature, and the relationship between the pressing amount of the straightening roller and bending deflection, the relationship between bending curvature and the pressing amount of the straightening roller is determined, including: The relationship between the bending curvature and the reduction of the straightening roller is determined using the following formula: Compare the curvature of each straightening roll, and determine the roll shape of the straightening roll based on the comparison results, including: Compare the magnitude of the bending curvature of each straightening roll, and determine the waviness control amount of the straightening roll based on the comparison results; The roll shape of the straightening roll is determined based on the control amount of the waviness of the straightening roll.

2. The method as described in claim 1, characterized in that, The straightening roller waviness control amount is determined based on the comparison results, including: The minimum value of the straightening roller waviness control amount is calculated using the following formula: C min =k1C max ; Where k1 is the curvature ratio between the straightening rollers. A max1 The curvature of the straightening roller with the largest bending curvature, A max2 The curvature of the straightening roller with the second largest bending curvature, A mid1 The curvature of the straightening roller with the third largest bending curvature, A mid2 The curvature of the straightening roller with the fourth largest bending curvature; C min C is the minimum value of the straightening roller waviness control amount. max The maximum value of the straightening roller waviness control amount is determined by considering the actual degree of waviness.

3. A straightening control device for a straightening machine with a wave-shaped plate, characterized in that, The straightening machine includes multiple upper row straightening rollers and multiple lower row straightening rollers, and the straightening control device of the straightening machine includes: The bending deflection determination module is used to obtain the pressing amount of the first straightening roller and the last straightening roller in the upper row. Based on the pressing amount of the first straightening roller and the last straightening roller in the upper row, the pressing amount of the remaining straightening rollers in the upper row (excluding the side rollers) and the pressing amount of the remaining straightening rollers in the lower row (excluding the side rollers) are determined. Based on the relationship between the pressing amount of the straightening rollers and the bending deflection, and the pressing amount of each straightening roller, the bending deflection of each straightening roller is determined. The module for determining the relationship between bending curvature and straightening roll reduction is used to construct the relationship between bending deflection and bending curvature based on the bending deflection of each straightening roll and the relationship between bending deflection and bending radius. Based on the relationship between bending deflection and bending curvature, and the relationship between the reduction of straightening roll and bending deflection, the module determines the relationship between bending curvature and the reduction of straightening roll. The bending curvature determination module is used to determine the bending curvature of each straightening roller based on the relationship between the bending curvature and the pressing amount of the straightening roller, as well as the pressing amount of each straightening roller. The mid-wave plate shape straightening control module is used to compare the curvature of each straightening roller, determine the roller shape of the straightening roller based on the comparison results, and perform straightening control on the mid-wave plate shape based on the roller shape of the straightening roller. The straightening machine is a nine-roll straightening machine; The bending deflection determination module is specifically used for: Calculate the reduction of the straightening rollers (excluding the side rollers) using the following formula: Where, k = δ2 / δ8, δ2 is the amount of pressure applied to the first straightening roller in the upper row with straightening roller number 2, δ4 is the amount of pressure applied to the second straightening roller in the upper row with straightening roller number 4, δ6 is the amount of pressure applied to the third straightening roller in the upper row with straightening roller number 6, and δ8 is the amount of pressure applied to the fourth straightening roller in the upper row with straightening roller number 8. Calculate the reduction of the straightening rollers (excluding the side rollers) using the following formula: Wherein, δ3 is the amount of pressure applied to the second straightening roller in the lower row of straightening roller number 3, δ5 is the amount of pressure applied to the third straightening roller in the lower row of straightening roller number 5, and δ7 is the amount of pressure applied to the fourth straightening roller in the lower row of straightening roller number 7. The bending deflection determination module is specifically used for: Calculate the bending deflection of each straightening roller using the following formula: Where i is the number of the straightening roller, υ i δ represents the bending deflection of each straightening roller. i This refers to the amount of pressure applied to each straightening roller; The module for determining the relationship between bending curvature and the reduction amount of the straightening roller is specifically used for: The relationship between bending deflection and bending curvature can be constructed using the following formula: Among them, A i For the curvature, ρ i Where is the bending radius, l is the pitch of the straightening roll, and X is an intermediate variable; The relationship between the bending curvature and the reduction of the straightening roller is determined using the following formula: The wave plate straightening control module is specifically used for: Compare the magnitude of the bending curvature of each straightening roll, and determine the waviness control amount of the straightening roll based on the comparison results; The roll shape of the straightening roll is determined based on the control amount of the waviness of the straightening roll.

4. The apparatus as described in claim 3, characterized in that, The wave plate straightening control module is specifically used for: The minimum value of the straightening roller waviness control amount is calculated using the following formula: C min =k1C max ; Where k1 is the curvature ratio between the straightening rollers. A max1 The curvature of the straightening roller with the largest bending curvature, A max2 The curvature of the straightening roller with the second largest bending curvature, A mid1 The curvature of the straightening roller with the third largest bending curvature, A mid2 The curvature of the straightening roller with the fourth largest bending curvature; C min C is the minimum value of the straightening roller waviness control amount. max The maximum value of the straightening roller waviness control amount is determined by considering the actual degree of waviness.

5. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method of any one of claims 1 to 2.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of any one of claims 1 to 2.

7. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method of any one of claims 1 to 2.

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