A roller control method for a wide flat metal profile straightening device

Abstract

The present application relates to a kind of roller control method suitable for wide flat metal profile straightening device, belong to straightening technical field.The straightening mechanism and detection mechanism are included, the straightening mechanism includes fixed frame and several film frame assemblies installed on the top surface of fixed frame, any film frame assembly includes straightening component and flattening component, the straightening component is adjustable with the two side walls of profile abut, the flattening component is adjustable with the top surface and bottom surface of profile abut, the straightening component and flattening component form straightening mouth, several straightening mouths are staggered arrangement;Detection mechanism is installed in the feed end of straightening mechanism and detects the bending degree of profile and is connected with straightening mechanism, the present application solves the problems of low efficiency, poor straightening accuracy and high labor intensity of existing straightening process.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of straightening technology, and particularly relates to a roller control method suitable for a wide flat metal profile straightening device. BACKGROUND

[0002] With the continuous improvement of the world industrial development level, the vigorous development of the automobile industry, the demand for plate materials, especially wide flat metal profiles, has increased dramatically. Wide flat metal profiles are simple to process, light in weight, and can bear a large load, so they are widely used in engineering, such as the top beams, floors, columns, and other parts of buildings, and the support and protection of underground pipelines. Due to the different needs of different industries for wide flat metal profiles, especially the wide range of varieties, large range of specifications, high shape accuracy, good forming performance, and strict surface requirements of wide flat metal profiles for automobiles, the demand for wide flat metal profiles is diversified. At the same time, higher requirements are put forward for the processing quality of wide flat metal profiles. During the rolling, cooling, and shearing processes of wide flat metal profiles, due to uneven plastic deformation, uneven heating and cooling, shearing, and transportation and stacking, etc., different degrees of bending, warping, wavy, sickle bending, and twisting plastic deformation, or internal residual stress are inevitably generated. Before becoming qualified products, the shape must be corrected and the residual stress must be eliminated by using a straightening machine. The traditional straightening process is repeatedly tried and measured by workers according to experience and estimation, which not only has low efficiency, poor straightening accuracy, and high labor intensity, but also affects the working performance of the parts and cannot guarantee the quality. SUMMARY

[0003] To solve the above problems in the prior art, the present application provides a roller control method suitable for a wide flat metal profile straightening device, which solves the problem of low efficiency, poor straightening accuracy, and high labor intensity caused by the repeated trial and measurement of the existing straightening process by workers according to experience and estimation.

[0004] The purpose of the present application can be achieved by the following technical scheme: a roller control method suitable for a wide flat metal profile straightening device, comprising a straightening mechanism and a detection mechanism, the straightening mechanism comprising a fixed frame and a plurality of film rack assemblies installed on the top surface of the fixed frame, any film rack assembly comprising a straightening assembly and a flattening assembly, the straightening assembly being adjustably abutted with the two side walls of the profile, the flattening assembly being adjustably abutted with the top surface and the bottom surface of the profile, the straightening assembly and the flattening assembly forming a straightening port, and a plurality of straightening ports being arranged alternately; the detection mechanism is installed at the feeding end of the straightening mechanism and detects the bending degree of the profile and is communicatively connected with the straightening mechanism; further comprising the following steps:

[0005] S1: sampling, detecting the sample of the wide flat metal profile to obtain the deflection value when the wide flat metal profile is purely elastically bent ;

[0006] S2: preset deviation value of straightening mouth, center distance between 1st straightening mouth and 2nd straightening mouth is recorded as , and straightening wheel radius is recorded as R;

[0007] S3: detection, the bending rate of the wide flat metal profile is detected and the maximum bending rate is recorded as original bending rate ;

[0008] S4: deviation value model is established, data of S1-S3 is brought into the model to calculate the i+1th straightening mouth;

[0009] S5: adjustment, the position of the straightening mouth is adjusted according to the deviation value;

[0010] S6: straightening, the profile is straightened and it is judged whether the straightening is completed;

[0011] S7: it is judged whether the straightening is completed, if yes, the straightening is ended and is 0, if no, the next step is executed, in the formula, is the relative springback rate under the i th roller, is the relative bending rate of the i th straightening wheel and the i+1th straightening wheel, is the residual curvature;

[0012] S8: the next time is the original curvature of re-bending ;

[0013] S9: the deviation value of the next straightening mouth is calculated again;

[0014] S10: steps S5-S9 are repeated until the straightening is completed.

[0015] As a preferred technical scheme of the present application, the straightening mechanism further comprises a support frame and a fixed frame, the support frame is installed on the top surface of the fixed frame, the fixed frame is installed on the top of the support frame, the straightening assembly comprises two first motors and two straightening wheels, the two first motors are respectively installed on the opposite two side walls of the fixed frame and connected with the two straightening wheels, the flattening assembly comprises two flattening wheels and two second motors, the two second motors are respectively installed on the top surface and the bottom surface of the fixed frame and connected with the two flattening wheels, and the two straightening wheels and the two flattening wheels enclose the straightening mouth.

[0016] As a preferred technical scheme of the present application, the bottom of the support frame is further provided with a plurality of positioning members, the top surface of the fixed frame is provided with a plurality of positioning holes, and the plurality of positioning members are installed on the bottom of the support frame in a rectangular array and one end of each positioning member is located in the positioning hole.

[0017] As a preferred technical scheme of the present application, the positioning member comprises a positioning seat and a positioning ball, the positioning seat is installed at the bottom of the support frame, a sliding groove is formed in the bottom surface of the positioning seat, and the positioning ball is slidingly arranged in the sliding groove and abuts against the positioning hole when the support frame is installed.

[0018] As a preferred technical scheme of the present application, in step S4, the deviation value model is , , wherein is the relative total bending rate under the i-th straightening port.

[0019] As a preferred technical scheme of the present application, in step S4, , wherein is the elastic limit bending moment when the wide flat metal profile is purely elastically bent, E is the elastic modulus of the wide flat metal profile to be straightened, J is the cross-sectional moment of inertia of the wide flat metal profile to be straightened, and t is the distance between two adjacent straightening ports.

[0020] As a preferred technical scheme of the present application, in step S4, , wherein b is the width of the wide flat metal profile to be straightened, h is the thickness of the wide flat metal profile to be straightened, and is the yield strength of the wide flat metal profile.

[0021] As a preferred technical scheme of the present application, in step S3, the bending rate of the wide flat metal profile can be detected by using an optical detection method.

[0022] As a preferred technical scheme of the present application, in step S5, the position of the straightening port is adjusted by using the first motor.

[0023] As a preferred technical scheme of the present application, in step S7, .

[0024] The present application has the following beneficial effects:

[0025] 1. The straightening assembly and the flattening assembly ensure that the overall size of the wide flat profile does not change during the straightening process.

[0026] 2. The position of the straightening port is determined by establishing a deviation value model, the original curvature is obtained by detecting the initial bending degree of the profile, the deviation value of the position of the next straightening port is obtained by calculating the original curvature, the deviation value of the position of the next straightening port is obtained by taking the residual curvature as the original curvature of the next straightening port, and the process is repeated until the residual curvature is zero, which means that the profile has been straightened. The present application solves the problems of low efficiency, poor straightening accuracy, and high labor intensity caused by repeated trial and measurement based on experience and estimation in the existing straightening process. BRIEF DESCRIPTION OF DRAWINGS

[0027] For the convenience of those skilled in the art to understand, the present application is further described below in conjunction with the drawings.

[0028] Figure 1 Flow chart of the control method of the present application;

[0029] Figure 2 Structure diagram of the present application;

[0030] Figure 3 Structure diagram of the straightening mechanism of the present application;

[0031] Figure 4 Structure diagram of the straightening assembly of the present application;

[0032] Figure 5 Structure diagram of the positioning member of the present application;

[0033] Explanation of main component symbols

[0034] In the drawings: 1, fixed frame; 2, film frame mechanism; 21, support frame; 22, fixed frame; 23, straightening assembly; 231, first motor; 232, straightening wheel; 24, flattening assembly; 241, flattening wheel; 242, second motor; 3, positioning member; 31, positioning seat; 32, positioning ball. DETAILED DESCRIPTION

[0035] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined application purposes, the specific embodiments, structures, features and effects according to the present application are described in detail below in conjunction with the drawings and preferred embodiments.

[0036] Please refer to Figures 1-5The embodiment provides a roller control method suitable for a wide and flat metal profile straightening device, which comprises a straightening mechanism and a detection mechanism. The straightening mechanism comprises a fixed frame 1 and a plurality of film frame assemblies installed on the top surface of the fixed frame 1. Any film frame assembly comprises a straightening assembly 23 and a flattening assembly 24. The straightening assembly 23 abuts against the two side walls of the profile, the flattening assembly 24 abuts against the top surface and the bottom surface of the profile, the adjusting end of the adjusting assembly and the flattening end of the flattening assembly 24 form a rectangular straightening opening, the adjusting assembly abuts against the two side walls of the wide and flat metal profile, the flattening assembly 24 abuts against the top surface and the bottom surface of the profile, and the plurality of straightening openings are staggered. The detection mechanism is installed at the feeding end of the straightening mechanism, detects the bending degree of the profile and is in communication connection with the straightening mechanism. When the wide and flat profile is straightened, the flattening assembly 24 abuts against the upper and lower surfaces of the wide and flat profile, so that the overall size of the profile does not change when the profile is adjusted by the straightening assembly 23 during the straightening process. Meanwhile, the detection result of the detection mechanism is processed, and the straightening of the profile is completed by adjusting the center line offset of the straightening opening formed by the straightening assembly 23 and the flattening assembly 24.

[0037] During the straightening of some wide and flat profiles, especially the wide and flat profiles with a large width-thickness ratio, the size of the straightened profile is prone to change. For example, when the straightening rollers are arranged on the left and right sides, the profile is easily squeezed left and right during the straightening process, so that the thickness of the profile changes. Even the profile is too thin to be deflected during the straightening process, so that the straightening fails. Meanwhile, the profile is not only bent on the side edge, but also bent in the thickness direction, which also needs to be straightened. However, the upper and lower straightening rollers are prone to cause the profile to deviate during the straightening process, so that the wide and flat profile also fails to be straightened.

[0038] In order to solve the above problems, the flattening assembly 24 is used to limit the deflection during the straightening or the bending in the thickness direction, and the straightening assembly 23 is used to complete the straightening of the profile, so that the problem that the existing straightening machine cannot well straighten the wide and flat profile is avoided. Meanwhile, the straightening of the wide and flat profile can be more smoothly completed through the arrangement of the straightening assembly 23 and the flattening assembly 24.

[0039] The straightening of the wide and flat profile comprises the following steps:

[0040] S1: sampling, detecting a sample of the wide and flat metal profile to obtain the deflection value of the wide and flat metal profile when the wide and flat metal profile is purely elastically bent;

[0041] S2: presetting the deviation value of the straightening opening, taking the center distance between the first straightening opening and the second straightening opening as d, and taking the radius of the straightening wheel 232 as R.

[0042] S3: detecting, detecting the bending rate of the wide flat metal profile and recording the maximum bending rate as the original bending rate;

[0043] S4: establishing a deviation value model, bringing the data of S1-S3 into the model for calculation to obtain the i+1 straightening port;

[0044] S5: adjusting, adjusting the position of the straightening port according to the deviation value;

[0045] S6: straightening, straightening the profile and judging whether the straightening is completed;

[0046] S7: judging whether the straightening is completed, if yes, ending the straightening and being 0, if no, executing the next step, wherein is the relative springback rate under the i roller, is the relative bending rate of the i straightening roller 232 and the i+1 straightening roller 232, and is the residual curvature;

[0047] S8: being the original curvature of the next re-bending;

[0048] S9: re-calculating the deviation value of the next straightening port;

[0049] S10: repeating steps S5-S9 until the straightening is completed.

[0050] However, due to various reasons, the profile may be bent during production, for example, thermal stress generated during cutting or processing, such as local heating during welding, cutting, etc., which may cause local thermal expansion or thermal contraction, deformation and bending, or during transportation, storage, stacking, etc., the plate is subjected to external force, which is easy to cause surface buckling, bending deformation, therefore, the stress, surface buckling and bending deformation of each profile are different, in order to better straighten the profile, by adjusting the adjusting roller with different convexity and concavity, applying friction and the deformation ability of the roller to bend and adjust the plate, and eliminate the bending of the profile, since the condition of each profile is not the same, that is, the same straightening scheme is used to straighten each profile, and the error rate of the profile is large, therefore, in order to accurately complete the straightening of the profile and reduce the straightening time, the roller is controlled to accurately straighten, during straightening, through the execution of steps S1-S10, different profiles can be adjusted after the adjustment value of the next adjustment after the calculation of the deviation value model during straightening, so that each profile can be accurately adjusted to complete the straightening process, avoiding the situation that a large amount of time is spent or a large error rate occurs during straightening due to the different conditions of each profile.

[0051] In order to let the straightening mouth can be according to the deviation value model calculated value of accurate adjustment, in the embodiment, the straightening mechanism also includes support frame 21 and fixed frame 22, support frame 21 is installed on the top surface of the fixed frame 1, the fixed frame 22 is installed on the top of support frame 21, straightening assembly 23 includes two first motor 231 and two straightening wheel 232, two first motor 231 are respectively installed on the opposite two side walls of fixed frame 22 and connected with two straightening wheel 232, flat assembly 24 includes two flat wheel 241 and two second motor 242, two second motor 242 are respectively installed on the top surface and bottom surface of fixed frame 22 and connected with two flat wheel 241, two straightening wheel 232 and two flat wheel 241 form straightening mouth, first motor 231 and second motor 242 are in communication connection with detection mechanism, when straightening, the position of straightening wheel 232 and flat wheel 241 is controlled by two motors, to complete the accurate control of the position of straightening mouth, reduce the situation that straightening effect is poor due to the deviation of straightening mouth, and then improve the straightening effect, reduce the number of straightening.

[0052] In order to ensure that the straightening mouth of the film rack assembly is not affected by other factors when offsetting, in an embodiment, the bottom of the support frame 21 is also provided with a plurality of positioning members 3, the top surface of the fixed frame 1 is provided with a plurality of positioning holes, the plurality of positioning members 3 are installed on the bottom of the support frame 21 in a rectangular array and one end is located in the positioning hole, in order to ensure that the center of the straightening mouth is consistent with the preset value when offsetting in the initial stage, therefore, it is necessary to ensure that the film rack assembly is on the same axis during installation, avoid the deviation of the straightening mouth axis in the initial stage due to the deviation of the position of the film rack assembly itself, so that the straightening mouth can reach the preset position when adjusting according to the deviation value, when installing the film rack assembly, first control the installation position of the film rack assembly itself by the positioning member 3, ensure that each film rack assembly does not deviate during installation.

[0053] In order to better position, in an embodiment, the positioning member 3 comprises a positioning seat 31 and a positioning ball 32, the positioning seat 31 is installed at the bottom of the support frame 21, the bottom surface of the positioning seat 31 is provided with a sliding groove, and the positioning ball 32 is slidingly arranged in the sliding groove. The positioning ball 32 is in abutment with the positioning hole when the support frame 21 is installed. When positioning, the positioning ball 32 is first brought into abutment with the positioning hole, and the positioning seat 31 is pressed downward, so that the positioning ball 32 is extruded and slides into the sliding groove through the positioning hole. When the positioning ball 32 slides in the sliding groove and contacts the inner bottom surface of the positioning seat 31, the positioning ball 32 will leak out a small part to maintain the positioning effect. After the positioning seat 31 is fixed, the position of the support frame 21 is determined. The positioning effect of the support frame 21 is ensured by arranging the support frame 21 in a rectangular array through multiple positioning members 3. The positioning of the film frame assembly itself is ensured, so that the center line of each film frame assembly is on the same axis, and the error caused by the inaccurate positioning of the film frame assembly itself is avoided when the straightening opening is offset.

[0054] Because the profile will bend at different positions due to various reasons, and when straightening the profile, if the same deviation value of the straightening opening is used to complete the straightening process of the profile, it is likely that the bending degree of the profile at a certain position exceeds the preset deviation value, resulting in straightening failure. At this time, it is necessary to adjust the deviation value of the straightening opening to maintain the straightening process of the profile. However, during the straightening process, workers usually repeat the trial and measurement according to experience and estimation. This method not only has low efficiency, poor straightening accuracy and high labor intensity, but also affects the working performance of the part and cannot guarantee the quality.

[0055] In order to adjust the position of the straightening opening through the deviation value model to better straighten, the deviation value model is , , wherein is the relative total bending rate under the i-th straightening opening. The deviation value of the next straightening opening can be obtained by bringing the detected and sampled various data into the model.

[0056] In step S4, , wherein is the elastic limit bending moment of the wide flat metal profile when it is purely elastically bent, E is the elastic modulus of the straightened wide flat metal profile, J is the cross-sectional moment of inertia of the straightened wide flat metal profile, and t is the distance between two adjacent straightening openings.

[0057] In the above formula, , wherein b is the width of the straightened wide flat metal profile, h is the thickness of the straightened wide flat metal profile, is the yield strength of the wide flat metal profile, and these data can be obtained by detecting the sample of the wide flat metal profile.

[0058] In order to obtain the deviation value of the next straightening port, the straightened wide flat metal profile needs to be detected, and the original curvature of the profile can be detected by an optical detection method, which can measure the shape and curvature of the profile surface by a laser scanner.

[0059] In order to more accurately adjust the position of the straightening port, in step S5, the position of the straightening port is adjusted by the first motor 231, and the deviation value of the straightening port is adjusted by adjusting the position of the straightening assembly 23 by the motor. The movement of the motor controls the movement of the straightening wheel 232 is more accurate than manual control, which can ensure that the straightening port can be more accurate when moving according to the deviation value, reduce errors and improve precision.

[0060] In step S7, , the value of is obtained, so that the value of is gradually reduced each time the adjustment is made to complete the straightening process.

[0061] When straightening, the test results are as follows:

[0062]

[0063] From the above test, it can be seen that when the profile passes through the sixth straightening port, the straightening process is basically completed.

[0064] Therefore, after the straightening is completed by the last straightening port, the data of the profile is calculated or detected, and the data is brought into the deviation value model to obtain the deviation value data of the next straightening port. The process is repeated to complete the straightening process. By this way, the straightening of the profile is completed, different profiles can be straightened, the straightening efficiency and precision are improved, and the labor intensity of workers is reduced.

[0065] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, and any equivalent embodiments with equivalent changes are equivalent. Any modification, change, modification and modification of the above embodiments according to the technical essence of the present application, all still belong to the scope of the technical solution of the present application.​

Claims

1. A roller control method suitable for use in a wide flat metal profile straightening device, characterized by: The straightening mechanism comprises a fixed frame and a plurality of film frame assemblies installed on the top surface of the fixed frame, any film frame assembly comprises a straightening assembly and a flattening assembly, the straightening assembly is adjustable to abut against the two side walls of the profile, the flattening assembly is adjustable to abut against the top surface and the bottom surface of the profile, the straightening assembly and the flattening assembly enclose a straightening port, and a plurality of straightening ports are staggered; the detection mechanism is installed at the feeding end of the straightening mechanism, detects the bending degree of the profile, and is in communication connection with the straightening mechanism; the method further comprises the following steps: S1: sampling, detecting a sample of the wide and flat metal profile, and obtaining a deflection value of the wide and flat metal profile when purely elastically bent ; S2: preset the deviation value of the straightening port, the center distance between the first straightening port and the second straightening port is recorded as , and the straightening wheel radius is recorded as R; S3: detecting, detecting the bending rate of the wide flat metal profile and recording the maximum bending rate thereof as the original bending rate ; S4: establishing a deviation value model, bringing the data of S1-S3 into the model for calculation to obtain the i+1 straightening port; S5: adjusting, adjusting the position of the straightening port according to the deviation value; S6: straightening, straightening the profile and judging whether the straightening is completed; S7: judging whether the straightening is completed, yes, ending the straightening and is 0, no, executing the next step, in which, is the relative recovery rate under the i-th roller, is the relative curvature of the i-th straightening roller and the i+1-th straightening roller, is the residual curvature; S8: then for the next re-bend original curvature ; S9: calculating the deviation value of the next straightening port again; S10: repeating steps S5-S9 until the straightening is completed; In step S4, the deviation value model is , , where is the relative total curvature under the i-th straightening mouth.

2. A roller control method for a wide flat metal profile straightening apparatus according to claim 1, characterized in that: The straightening mechanism further comprises a support frame and a fixed frame, the support frame is installed on the top surface of the fixed frame, the fixed frame is installed on the top of the support frame, the straightening assembly comprises two first motors and two straightening wheels, the two first motors are respectively installed on the opposite two side walls of the fixed frame and are connected with the two straightening wheels, the flattening assembly comprises two flattening wheels and two second motors, the two second motors are respectively installed on the top surface and the bottom surface of the fixed frame and are connected with the two flattening wheels, and the two straightening wheels and the two flattening wheels enclose the straightening port.

3. A method of roller control for a wide flat metal profile straightening apparatus according to claim 2, wherein: The bottom of the support frame is further provided with a plurality of positioning members, the top surface of the fixed frame is provided with a plurality of positioning holes, and the plurality of positioning members are installed on the bottom of the support frame in a rectangular array and one end of each positioning member is located in the positioning hole.

4. A method of controlling the rollers of a straightening device for wide, flat metal profiles according to claim 3, characterized in that: The positioning member comprises a positioning seat and a positioning ball, the positioning seat is installed on the bottom of the support frame, the bottom surface of the positioning seat is provided with a sliding groove, the positioning ball is slidingly arranged in the sliding groove, and the positioning ball abuts against the positioning hole when the support frame is installed.

5. A method of controlling the rollers of a device for straightening wide, flat metal profiles according to claim 1, characterized in that: In step S4, , wherein is the elastic limit bending moment of the wide flat metal profile when it is purely elastically bent, E is the modulus of elasticity of the wide flat metal profile being straightened, J is the cross-sectional moment of inertia of the wide flat metal profile being straightened, and t is the distance between two adjacent straightening openings.

6. A roller control method for a wide flat metal profile straightening apparatus according to claim 5, characterized in that: In step S4, where b is the width of the flat metal profile to be corrected, and h is the thickness of the flat metal profile to be corrected. is the yield strength of the flat metal profile.

7. A method of controlling the rollers of a device for straightening wide, flat metal profiles according to claim 1, characterized in that: In step S3, the optical detection method is adopted to detect the bending rate of the wide and flat metal profile.

8. A method of controlling the rollers of a device for straightening wide, flat metal profiles according to claim 1, characterized in that: In step S5, the position of the straightening port is adjusted by the first motor.

9. A method of controlling the rollers of a device for straightening wide, flat metal profiles according to claim 1, characterized in that: In step S7, .

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