Automatic compensation method and system for diameter expansion of winding drum

Abstract

The invention relates to the technical field of hot rolling production in the metallurgical industry, and particularly discloses an automatic compensation method and system for diameter expansion of a winding drum, and the method comprises the following steps: S1, obtaining a set value and sending the set value to a winding drum expansion and contraction control mechanism; s2, obtaining a detection value of the diameter expansion of the winding drum and an empirical relationship between the diameter expansion of the winding drum and a compensation value; s3, based on the detection value and the empirical relationship, determining a compensation value corresponding to the detection value; s4, calculating a correction value based on the compensation value; s5, superposing the correction value and the set value to obtain superposed data as the set value in the step S1; and S6, repeating the steps S1 to S5 until the detection value of the diameter expansion of the winding drum is within the target interval. Program automatic compensation is adopted, accumulation correction of each reel and multi-batch and small-range real-time supply are achieved, the reel diameter expansion value meets the requirement of the production technology for reel diameter expansion, and an operator does not need to manually intervene in the reel correction value any more.

Description

Technical Field

[0001] The present invention relates to the technical field of hot rolling production in the strip metallurgy industry, and particularly relates to a method and system for automatic compensation of reel diameter expansion. Background Art

[0002] The main functions of the coiler on the 1450 rolling line in the sheet plant are to complete the coiling and uncoiling of the strip steel. In order to ensure that the coiled steel coil can be smoothly unloaded from the coiler reel, the reel must be pre-expanded before starting to wind. The reel has a certain pre-expansion value. Moreover, when the strip steel head winds one to one and a half circles on the reel, the reel starts to fully expand its diameter (the reel expands its diameter with the maximum pressure of the hydraulic station at 120 Bar). At the same time, the coiler and the strip steel interact to establish tension. During the subsequent coiling process, this reel diameter expansion value basically remains unchanged. When the strip steel is coiled, the uncoiling trolley starts the uncoiling program. During this process, the reel will start to contract its diameter to smoothly complete the uncoiling, and then the reel expands its diameter again to the pre-expansion position, waiting to coil the next strip steel. It can be seen from the entire coiling process that the expansion and contraction of the reel are very important for completing the coiling and uncoiling of the strip steel head.

[0003] In view of this, in order to combine program control to achieve the purpose of reducing manual operation intervention in the pre-expansion compensation value of the reel, improvements should be made to the existing technology. Summary of the Invention

[0004] The main purpose of the present invention is to provide a method and system for automatic compensation of reel diameter expansion, which adopts program automatic compensation to achieve cumulative correction for each coil, real-time supply in multiple batches and small ranges, so that the reel diameter expansion value meets the requirements of the production process for reel diameter expansion. Operators no longer manually intervene in the correction value of the reel, thereby realizing intelligent production, helping to enhance the competitiveness of the enterprise, and achieving a more efficient and stable production process.

[0005] According to one aspect of the present invention, a method for automatic compensation of reel diameter expansion is proposed, which includes the following steps: S1. Obtain the set value and send the set value to the reel expansion and contraction control mechanism; S2. Obtain the detected value of the reel diameter expansion and the empirical relationship between the reel diameter expansion and the compensation value; S3. Based on the detected value and the empirical relationship, determine the compensation value corresponding to the detected value; S4. Calculate the correction value based on the compensation value; S5. Superimpose the correction value and the set value to obtain the superimposed data as the set value in step S1; S6. Repeat steps S1 to S5 until the detected value of the reel diameter expansion is within the target range.

[0006] According to an embodiment of the present invention, step S4 includes: Calculate the correction value according to the following formula:

[0007] Where y is the correction value; x is the compensation value; a is the correction coefficient, and the value range is 0.9 to 1.1.

[0008] According to an embodiment of the present invention, the drum expansion and contraction control mechanism includes a servo valve and an expansion and contraction oil cylinder, and the detected value of the drum diameter expansion is determined based on the detected value of the piston rod movement position of the expansion and contraction oil cylinder.

[0009] According to an embodiment of the present invention, in step S2, the range of the correction value is ±3 mm.

[0010] According to an embodiment of the present invention, the target range is 753 to 758 mm.

[0011] According to an embodiment of the present invention, when in an abnormal state, step S5 includes superimposing the correction value, the set value, and the manual intervention value.

[0012] According to an embodiment of the present invention, the compensation value is collected through a segmented curve.

[0013] According to an embodiment of the present invention, the detected value of the drum diameter expansion is detected by non-contact ultrasonic detection and is fed back to the control module in real time.

[0014] According to another aspect of the present invention, a drum diameter expansion automatic compensation system is proposed, which includes: A drum expansion and contraction control mechanism configured to control the expansion and contraction of the drum; A drum diameter expansion detection module configured to detect the drum diameter expansion; and A control module, communicatively connected to the drum expansion and contraction control mechanism and the drum diameter expansion detection module, and configured to perform the method mentioned in the above technical solution.

[0015] According to an embodiment of the present invention, the drum expansion and contraction control mechanism includes a servo valve and an expansion and contraction oil cylinder; the drum diameter expansion detection module includes a displacement sensor configured to detect the position movement of the piston rod of the expansion and contraction oil cylinder; the control module is configured to determine the detected value of the drum diameter expansion based on the offset of the position movement of the piston rod.

[0016] In a drum diameter expansion automatic compensation method and system according to an embodiment of the present invention, program automatic compensation is adopted to achieve cumulative correction for each roll, real-time supply in multiple batches and small ranges, so that the drum diameter value meets the requirements of the production process for the drum diameter. The operator no longer manually intervenes in the drum correction value, thereby realizing intelligent production, which helps to enhance the competitiveness of the enterprise and achieve a more efficient and stable production process. Brief Description of the Drawings

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Shows a process flow chart of an automatic compensation method for drum diameter expansion according to the present invention; Figure 2 Shows a schematic structural diagram of a coiler according to the present invention; Figure 3 Shows a corresponding relationship diagram between the moving position of the piston rod and the expansion and contraction position of the drum according to the present invention; Figure 4 Shows a comparison diagram of the manual and automatic compensation effects of the drum according to the present invention; Figure 5 Shows an operation screen of coiler No. 1 according to the present invention; Figure 6 Shows an operation screen of coiler No. 2 according to the present invention; Figure 7 Shows a schematic diagram of an automatic compensation system for drum diameter expansion according to the present invention; Figure 8 Shows a schematic diagram of the automatic compensation correction value corresponding to the expansion and contraction of the drum according to the present invention; Figure 9 Shows a control block diagram of the automatic compensation for drum diameter expansion according to the present invention; Figure 10 Shows a schematic diagram of the effect after the superposition of the automatic compensation correction value of the drum according to the present invention. Detailed Embodiments

[0019] The following detailed description of the embodiments is used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention. The present invention can be implemented in many different forms, not limited to the specific embodiments disclosed in the text, but including all technical solutions falling within the scope of the claims.

[0020] These embodiments of the present invention are provided to make the present disclosure thorough and complete, and to fully convey the scope of the present invention to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of the components and steps described in these embodiments, the components of the materials, the numerical expressions and values should be construed as merely exemplary, rather than as limitations.

[0021] It should be noted that in the description of the present invention, unless otherwise specified, the meaning of "a plurality" is greater than or equal to two; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0022] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0023] All terms used in the present invention have the same meaning as understood by those of ordinary skill in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0024] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, these technologies, methods, and devices should be regarded as part of the specification.

[0025] As Figure 1 shown, the present invention provides an automatic compensation method for the diameter expansion of a reel, which includes the following steps: S1. Obtain a set value and send the set value to the reel expansion and contraction control mechanism; S2. Obtain the detected value of the reel diameter expansion and the empirical relationship between the reel diameter expansion and the compensation value; S3. Based on the detected value and the empirical relationship, determine the compensation value corresponding to the detected value; S4. Calculate a correction value based on the compensation value; S5. Superimpose the correction value and the set value to obtain the superimposed data as the set value in step S1; S6. Repeat steps S1 to S5 until the detected value of the reel diameter expansion is within the target range.

[0026] In the drum diameter expansion automatic compensation method and system according to an embodiment of the present invention, program automatic compensation is adopted to achieve cumulative correction for each roll, real-time supply in multiple batches and small ranges, so that the drum diameter expansion value meets the requirements of the production process for the drum diameter expansion. The operator no longer manually intervenes in the drum correction value, thereby realizing intelligent production, which helps to improve the competitiveness of the enterprise and achieve a more efficient and stable production process.

[0027] As Figure 2 shown, the drum of the coiler consists of components such as a hollow main shaft, a pyramidal core shaft, a segment plate, an expansion and contraction oil cylinder, a connecting rod, and a column wedge. The hollow main shaft has a through axial inner hole and radial holes. The pyramidal core shaft is installed in its axial hole and can achieve axial movement. The column wedge is installed in its radial hole and can achieve radial movement. The right end of the hollow main shaft is connected to the expansion and contraction oil cylinder through a connecting body. The left section of the pyramidal core shaft has two sections of pyramidal surfaces, which are in contact with the inclined surfaces of the column wedges. The right end of the pyramidal core shaft is connected to the piston rod of the expansion and contraction oil cylinder through a connecting block. The segment plate is connected to the pyramidal core shaft through a connecting rod. The lower plane of the segment plate is in contact with the column wedge. The extension shaft is connected to the hollow main shaft through bolts. The expansion and contraction range of the drum is 727 - 762 mm.

[0028] For the expansion and contraction signal of the drum, non-contact ultrasonic detection is adopted. The signal reflected from the measuring disk is received and fed back to the upper computer program. The expansion and contraction oil cylinder is controlled by a servo valve to push the piston to drive the drum to expand and contract, thereby controlling the outer diameter of the drum.

[0029] Figure 3 The corresponding relationship diagram between the moving position of the piston rod and the expansion and contraction position of the drum is shown.

[0030] The drum has 3 positions: shrinkage (minimum value: 727 mm), pre-expansion (basic value: 745 mm, which is superimposed with the correction value after being issued by the process automation program), and diameter expansion (maximum value: 762 mm). Before coiling, the drum is in the pre-expansion position. When coiling reaches certain conditions, the diameter starts to expand and stops expanding when the pressure reaches the pressure limit for drum diameter expansion. After coiling is completed, when unloading the coil, the drum shrinks to 727 mm to complete the cooperation with the uncoiling trolley for transportation.

[0031] Based on the above embodiments, step S4 includes: Calculating the correction value according to the following formula:

[0032] where y: correction value; x: compensation value; a: correction coefficient, and the value range is 0.9 - 1.1.

[0033] This formula is used to dynamically adjust the pre-expansion value of the reel. The purpose is to make the pre-expansion value within the target range during the winding process through multiple iterative corrections. Its mechanism is to dynamically adjust the correction value according to the current compensation value combined with the correction coefficient a, and then adjust the pre-expansion value. The symbol "±" indicates that the adjustment direction needs to be determined according to the actual deviation direction (for example: when the pre-expansion value of the reel exceeds the target range, the correction value is reduced, otherwise it is increased). When performing the first round of loop, obtain y 当前 When doing so, historical manual adjustment data or previous empirical correction values can be used as a reference a Take the middle value (such as 1.0) as the initial correction coefficient to avoid excessive adjustment amplitude for the first time.

[0034] Based on the above embodiments, the reel expansion and contraction control mechanism includes a servo valve and an expansion and contraction oil cylinder. The detected value of the reel diameter expansion is determined based on the offset of the piston rod position movement of the expansion and contraction oil cylinder. By directly detecting the displacement offset of the piston rod of the expansion and contraction oil cylinder to determine the reel diameter expansion, the accuracy loss caused by mechanical transmission errors, reel deformation or environmental interference in traditional indirect measurement can be eliminated, and high-precision control can be achieved.

[0035] In a specific embodiment, in step S2, the range of the correction value is ±3mm. This operation significantly reduces the frequency of manual intervention by the operator, improves the accuracy and stability of the reel diameter expansion control, and at the same time ensures that the outer diameter of the reel after diameter expansion is always within the ideal range of 753mm to 758mm. The automatic compensation program dynamically adjusts the correction value based on operation historical data and a preset algorithm, avoiding the uncertainty of manual operation, making the reel diameter expansion process smoother, and reducing the problem of excessive compensation caused by specification transition.

[0036] Based on the above embodiments, the target range is 753 - 758mm. This is the ideal diameter range for the reel diameter expansion after the reel winds the steel. It ensures that the outer diameter of the reel is always within the optimal working range during the coiling process of the steel coil, avoiding both the problem of loose steel coil or difficult uncoiling caused by insufficient diameter expansion and the equipment overload or surface damage of the strip steel caused by excessive diameter expansion.

[0037] In a specific embodiment, when in an abnormal state, step S5 includes superimposing the correction value, the set value and the manual intervention value, so as to quickly restore control stability under abnormal working conditions (such as coil slippage, oil cylinder leakage), and avoid the risk of out-of-control cumulative error caused by solely relying on automatic correction.

[0038] In a specific embodiment, the compensation value is collected through a segmented curve. The segmented curve collection method realizes precise differential compensation for different reel diameter ranges, avoiding both the over-adjustment or under-adjustment problems that may be caused by linear compensation, and making the compensation value more in line with the actual working condition requirements through curve fitting.

[0039] On the basis of the above embodiments, the detected value of the reel diameter expansion is detected by non-contact ultrasonic detection and is fed back to the control module in real time. Specifically, non-contact ultrasonic sensors are used to achieve high-precision and non-wearing continuous monitoring. By eliminating the hysteresis and wear errors of mechanical contact detection, the acquisition accuracy of the diameter expansion data is improved.

[0040] In a specific embodiment, the method further includes that a manual intervention mode is set on the interaction interface. The original window for pre-adjusting and correcting the value of the operating reel is retained. If extreme situations occur and the program cannot adapt, manual modification is allowed, providing direct control means for operators to handle sudden working conditions. Through the dual guarantee mechanism, the system can maintain a high automatic operation rate while still covering the processing requirements of various abnormal working conditions.

[0041] On the basis of the above embodiments, the method is applicable to the coiler of the 1450 rolling line in the hot rolling production line of the metallurgical industry. The maximum coil diameter of the 1450 rolling line coiler is Φ2100mm, the coiling speed is 18m / s, and the expansion and contraction range of the reel is 727 - 762mm.

[0042] To verify the effect, the reels of coiler No. 1 and coiler No. 2 are randomly selected for experiments. The automatically compensated and corrected value calculated by the basic automation program is applied to the diameter expansion of the reel of coiler No. 2 for on-line testing. Operators only intervene in the diameter expansion correction value of the reel of coiler No. 1 to compare the diameter expansion data of the reel after automatic and manual correction. After one week of testing, the diameter expansion values of the reels are observed, and both meet the existing requirements. As Figure 4 shown, by comparing the manual and automatic compensation effects of the reel, it is found from the curve that the data of the automatically compensated and corrected value is smoother. According to the experimental results, after being recognized by the operator, the pre-adjusting and correcting value of the reel of coiler No. 1 is also completed by the program.

[0043] Based on the detected value and the empirical relationship, determining the compensation value corresponding to the detected value is completed by the L1-level program, and obtaining the set value and sending the set value to the reel expansion and contraction control mechanism is completed by the L2-level program.

[0044] Then analyze the correction value: The compensation for the pre-adjusting and correcting value of the reel by the L1-level program is basically between -1mm and -3.5mm. To reduce the phenomenon of over-compensation of the correction value when the specifications change too much, which has an adverse impact on the demand for the reel diameter expansion, the set value sent by the L2-level program is corrected by -1mm, making the set value of the reel sent by the L2-level program more in line with the actual situation of the reel. In this way, the L1-level program also automatically reduces the compensation value synchronously, which is beneficial for the change of specifications.

[0045] As Figure 5 and 6 shown, in the operation screens of coiler No. 1 and coiler No. 2, the diameter expansion correction value of the reel is no longer intervened.

[0046] As Figure 7 shown, the present invention also provides a drum diameter expansion automatic compensation system, which includes: a drum expansion and contraction control mechanism configured to control the expansion and contraction of the drum; a drum diameter expansion detection module configured to detect the drum diameter expansion; and a control module communicatively connected to the drum expansion and contraction control mechanism and the drum diameter expansion detection module and configured to perform the method mentioned in the above technical solution.

[0047] In a specific embodiment, the drum expansion and contraction control mechanism includes a servo valve and an expansion and contraction oil cylinder; the drum diameter expansion detection module includes a displacement sensor configured to detect the position movement of the piston rod of the expansion and contraction oil cylinder; the control module is configured to determine the detection value of the drum diameter expansion based on the offset of the position movement of the piston rod.

[0048] A specific application of the present invention is: As Figure 8 shown, the frequency of manual intervention and the magnitude of the compensation value are statistically operated. The operator compensates the drum diameter expansion value of the next coiler according to the steel coil diameter expansion value. Through data collection, it is determined that the correction value setting range is between +3 mm and -3 mm, and the target interval of the detection value after the drum winds the steel is: 753 - 758 mm, and the statistical value of the manual compensation operation is obtained.

[0049] Among them, the empirical relationship between the drum diameter expansion and the compensation value can be, for example, Figure 8 the curve shown.

[0050] The calculation formula of the correction value is:

[0051] Among them, y: correction value; x: compensation value; a: correction coefficient, and the value range is 0.9 - 1.1.

[0052] The compensation value corresponding to the drum diameter expansion is collected by a piecewise curve to obtain the correction value corresponding to the drum diameter expansion. The correction value is limited to ±3 mm. The pre-expansion value of the drum = the set value issued by the L2-level program + y 下次 + manual intervention value. The manual intervention value is retained on the screen and is used in emergency situations and is usually set to zero.

[0053] As Figure 9 shown, it is the automatic compensation control block diagram of the drum diameter expansion.

[0054] The specific execution process of the program is as follows: Through the drum expansion and contraction detection, the program judges the required correction value. Through program logic calculation, the correction value and the set value issued by the L2-level program are superimposed together and sent to the servo valve of the drum diameter expansion. The servo valve controls the oil circuit to expand and contract the drum. As Figure 10 shown, it is the completed automatic compensation effect.

[0055] The present invention provides a method and system for automatic compensation of the diameter expansion of a winding drum. The main feature is to use the existing control system, combined with the production process requirements for the diameter expansion of the coiler and the actual diameter expansion of the winding drum, considering factors such as the strip thickness and coiling temperature. Through automatic program compensation for the pre-expansion value of the winding drum diameter, cumulative correction for each coil is achieved, and real-time supply for multiple batches and small ranges is carried out to ensure that the diameter expansion value of the winding drum meets the production process requirements for the winding drum diameter expansion. The operator no longer intervenes in the correction value of the winding drum. The present invention has a clear control idea and simple control hardware. By finding the rules from the setting of the pre-expansion position of the winding drum by the operator and the operating habits, automatic following of the incoming material thickness control for the diameter expansion of the coiler winding drum is achieved, which is convenient for adjustment, and zero intervention for the diameter expansion of the coiler winding drum is realized. Moreover, this invention can be extended to be used in similar sheet production lines.

[0056] The above are exemplary embodiments disclosed by the present invention. The order of disclosure of the above embodiments of the present invention is only for description and does not represent the superiority or inferiority of the embodiments. However, it should be noted that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of disclosure of the embodiments of the present invention (including the claims) is limited to these examples. Without departing from the scope defined by the claims, various changes and modifications can be made. The functions, steps, and / or actions of the method claims according to the disclosed embodiments herein do not need to be performed in any specific order. In addition, although the elements disclosed in the embodiments of the present invention can be described or claimed in an individual form, they can also be understood as plural unless explicitly limited to the singular.

[0057] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features between the above embodiments or different embodiments can also be combined, and there are many other variations in different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention shall be included within the protection scope of the embodiments of the present invention.

Claims

1. An automatic compensation method for the diameter expansion of a reel, characterized in that, It includes the following steps: S1. Obtain a set value and send the set value to the drum expansion and contraction control mechanism; S2. Obtain the detected value of the drum diameter expansion and the empirical relationship between the drum diameter expansion and the compensation value; S3. Based on the detected value and the empirical relationship, determine the compensation value corresponding to the detected value; S4. Calculate a correction value based on the compensation value; S5. Superimpose the correction value and the set value to obtain the superimposed data as the set value in step S1; S6. Repeat steps S1 to S5 until the detected value of the drum diameter expansion is within the target range.

2. The automatic compensation method for the diameter expansion of the reel according to claim 1, characterized in that Step S4 includes: Calculate the correction value according to the following formula: Where y is the correction value; x is the compensation value; a is the correction coefficient, and the value range is 0.9 to 1.

1.

3. The automatic compensation method for the diameter expansion of the reel according to claim 1, characterized in that The drum expansion and contraction control mechanism includes a servo valve and an expansion and contraction oil cylinder, and the detected value of the drum diameter expansion is determined based on the detected value of the piston rod movement position of the expansion and contraction oil cylinder.

4. The automatic compensation method for the diameter expansion of the reel according to claim 1, wherein In step S2, the range of the correction value is ±3 mm.

5. The automatic compensation method for drum diameter expansion according to claim 1, characterized in that The target range is 753 to 758 mm.

6. The automatic compensation method for the drum diameter expansion according to claim 1, characterized in that, When in an abnormal state, step S5 includes superimposing the correction value, the set value, and the manual intervention value.

7. The automatic compensation method for the drum diameter expansion according to claim 1, wherein The compensation value is collected through a segmented curve.

8. The automatic compensation method for expanding the diameter of a reel according to claim 1, wherein The detected value of the drum diameter expansion is detected by non-contact ultrasonic and is fed back to the control module in real time.

9. A drum diameter expansion automatic compensation system, characterized in that, It includes: A drum expansion and contraction control mechanism configured to control the expansion and contraction of the drum; A drum diameter expansion detection module configured to detect the drum diameter expansion; And A control module communicatively connected to the drum expansion and contraction control mechanism and the drum diameter expansion detection module and configured to perform the method according to any one of claims 1-8.

10. The automatic compensation system for the diameter expansion of the reel according to claim 9, characterized in that, The drum expansion and contraction control mechanism includes a servo valve and an expansion and contraction oil cylinder; the drum diameter expansion detection module includes a displacement sensor configured to detect the position movement of the piston rod of the expansion and contraction oil cylinder; the control module is configured to determine the detected value of the drum diameter expansion based on the offset of the position movement of the piston rod.

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