Strip head positioning and coiling method and control system

Abstract

The invention relates to the technical field of strip coiling, and discloses a strip head positioning coiling method, which comprises the following steps of: performing low-speed reverse rotation operation on a coiling machine before coiling so as to position a rubber sleeve; in response to strip threading starting, a strip head position calculation program is activated, coiling initial information is obtained, and the strip head position is calculated in real time in combination with the coiling initial information; when the strip runs to an outlet of an outlet pinch roll, actual measurement position data of the strip head are obtained; performing comparison and judgment on the basis of actually measured position data and a real-time calculation result to automatically calibrate the position of the belt head; and judging based on the coiling information and the automatically calibrated strip head position data so as to automatically trigger the coiling machine to rotate forwards, and starting automatic coiling. Through automatic calibration and synchronous starting, the method is high in judgment precision, high in reliability and suitable for different types of automatic threading strip coiling units.

Description

Technical Field

[0001] The present invention relates to the technical field of strip coiling, and particularly to a strip head positioning coiling method and device. Background Art

[0002] Hot-rolled strip generally refers to coiled strip with a thickness of 1-20 mm and a width generally of 600-2000 mm. The hot-rolled strip can be directly used as hot-rolled steel plate or supplied as billet for cold-rolled strip. It is widely used in industrial sectors such as automotive, electrical machinery, chemical industry, shipbuilding, etc., and also serves as billet for cold rolling, welded pipe, and cold-formed section production. The hot strip mill is the main equipment for producing hot-rolled strip, with advantages such as high production efficiency, high output, and good quality. After being heated, rough rolled, finish rolled, and laminar cooled, the hot-rolled strip is coiled into a coil by a coiler, and the strip head needs to be accurately positioned at the coiler.

[0003] There are many problems in the traditional strip head positioning method for coiling, such as: (1) A fixed stop block is set at the inlet of the coiler. After the strip head hits the stop block, the coiler is triggered to start. This method has low positioning accuracy (±10-20 mm), cannot meet the high-precision coiling requirements, and has the problem of high maintenance cost due to frequent replacement of the worn stop block; (2) By measuring the traveling distance of the strip with an encoder, calculating the head position and triggering the coiler to start. This method ignores the slip rate between the strip and the roller table, the positioning error increases linearly with the distance, and there is a lack of secondary calibration mechanism. Generally speaking, the methods of the existing technology have problems such as insufficient accuracy, low reliability, and insufficient dynamic performance.

[0004] Therefore, there is a need to improve the strip head positioning coiling method in the existing technology. Summary of the Invention

[0005] In view of this, the purpose of the embodiments of the present invention is to propose a strip head positioning coiling method, which has high judgment accuracy and high reliability through automatic calibration and synchronous start, and is applicable to strip coiling units with different types of automatic threading.

[0006] Based on the above purpose, the embodiments of the present invention provide a strip head positioning coiling method, including: S1 Performing a low-speed reverse operation on the coiler before coiling to position the rubber sleeve; S2 In response to the start of strip threading, activating the strip head position calculation program, obtaining the initial coiling information, and calculating the strip head position in real time in combination with the initial coiling information; S3 When the strip runs to the outlet of the outlet pinch roll, obtaining the measured strip head position data; S4 Based on the comparison between the measured position data and the real-time calculation result, performing automatic calibration of the strip head position; S5 makes a judgment based on the coiling information and the head position data after automatic calibration to automatically trigger the forward rotation of the coiler and start automatic coiling.

[0007] In some embodiments, in S5, based on the coiling information, the length of one revolution of the rubber sleeve biting area of the coiler is obtained as L1, and based on the head position data after automatic calibration, the remaining length L2 from the head position to the coiler is calculated. When L1 = L2, the forward rotation of the coiler is automatically triggered to start automatic coiling.

[0008] In some embodiments, in S2, the initial coiling information includes: steel coil information, coiling pressure, coiling length, coiling quality, running speed of the strip conveyor roller, coiling circumference of the coiler, and the distance from the outlet pinch roll to the coiling position.

[0009] In some embodiments, in S3, in S2, the running speed of the strip and the initial position of the strip head are obtained, and the cumulative displacement of the strip is calculated using a time integration model to calculate the head position in real time.

[0010] In some embodiments, in S3, the measured head position data is obtained by detecting with an optoelectronic detection device.

[0011] In some embodiments, in S4, a comparison and judgment are made based on the measured position data and the real-time calculation result, a position tolerance threshold range is set, and when the judgment result is greater than the threshold range, automatic calibration of the head position is performed.

[0012] In some embodiments, it further includes: setting an artificial correction value input window to adjust the position of the strip head.

[0013] Another aspect of the present invention further includes a control system for a strip head positioning coiling method for implementing the above method, including: A drive module configured to perform a low-speed reverse operation on the coiler before coiling to position the rubber sleeve; A calculation module configured to activate a head position calculation program in response to the start of strip threading, obtain the initial coiling information, and calculate the head position in real time in combination with the initial coiling information; A data acquisition module configured to obtain the measured head position data when the strip runs to the outlet of the outlet pinch roll; A position calibration module configured to automatically calibrate the head position based on a comparison and judgment of the measured position data and the real-time calculation result; A judgment control module configured to make a judgment based on the coiling information and the head position data after automatic calibration to automatically trigger the forward rotation of the coiler and start automatic coiling.

[0014] In some embodiments, the control system further includes: A correction module configured for manual correction to adjust the position of the strip head.

[0015] In some embodiments, the judgment control module further controls the coiler to stop coiling after the strip winds around the coiler for 3 turns.

[0016] The present invention has at least the following beneficial technical effects: (1) The method of the present invention achieves significant technical improvement through an innovative dynamic synchronization control and position calibration mechanism. Based on the dynamic synchronization control technology of coiling information and the position of the strip head, the starting timing of the forward rotation of the coiler is accurately matched with the running position of the strip, breaking through the limitation of traditional fixed-point positioning. The strip biting position of the coiling device can be arbitrarily positioned, and only the synchronous start value needs to be modified; (2) By adopting a verification method, through the dynamic comparison of the theoretical calculation value and the actual measurement value, the system positioning error rate is reduced to less than 0.5%, improving the reliability of the device and ensuring the intervenability under abnormal working conditions. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. 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 embodiments can be obtained based on these drawings.

[0018] Figure 1 Schematic diagram of a strip head positioning coiling device provided by the present invention; Figure 2 Flowchart of an embodiment of a strip head positioning coiling method provided by the present invention; Figure 3 Schematic diagram of dynamic synchronous start provided by the present invention; Figure 4 Schematic diagram of an embodiment of a strip head positioning coiling control system provided by the present invention.

[0019] Explanation of the reference numerals in the drawings: 10. Coiler; 20. Exit pinch roll; 21. Photoelectric detection device; 22. Strip head; 23. Exit guide plate; 30. Slitting shear; 40. Conveyor roll. Detailed Embodiments

[0020] To make the objectives, technical solutions, and advantages of the present invention more clear, the following further elaborates on the embodiments of the present invention in detail with reference to specific embodiments and the accompanying drawings.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For example, the terms "length", "width", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position shown in the drawings, which is only for convenience of description and should not be construed as a limitation to the technical solution of the present invention.

[0022] The terms "comprising" and "having" and any variations thereof in the description and claims of the present invention and the above description of the drawings are intended to cover non-exclusive inclusion; the terms "first", "second", etc. in the description and claims of the present invention or the above drawings are used to distinguish different objects and not to describe a specific order. The meaning of "a plurality" is two or more unless specifically and clearly defined otherwise.

[0023] In the description and claims of the present invention and the above description of the drawings, when an element is referred to as being "fixed to" or "mounted on" or "disposed on" or "connected to" another element, it can be directly or indirectly located on that other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to that other element.

[0024] In addition, the mention of "embodiment" herein means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The phrase appears in various places in the description and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0025] As Figure 1The figure shows a schematic diagram of a strip head positioning coiling device provided by the present invention. The device includes a coiler 10, an outlet pinch roll 20, and a slitting shear 30 respectively. The strip is input from the rightmost side and runs leftward along the conveyor roll 40 for coiling. First, it passes through the slitting shear 30, whose function is to cut the continuously rolled strip into independent coils according to a set length. For example, if it is targeted to make 20 tons of steel into 4 steel coils of 5 tons each, after preliminary cutting by the slitting shear to determine the weight, it then enters the outlet pinch roll 20, which controls the movement trajectory of the strip head, adjusts the tension, and guides the strip into the coiler 10. The strip is wound into a steel coil according to the set tension to ensure a neat coil shape and no misalignment. However, there is a rubber sleeve on the mandrel of the coiler, and there is a groove on the mandrel. When positioning and coiling, the strip head needs to be accurately positioned in this groove with a width of only 20 mm. However, in the prior art, after the strip head passes through the pinch roll, due to inertia or tension fluctuations, the actual displacement usually deviates greatly from the predicted value, resulting in the inability to accurately position the strip head and the inability to predict when to start the rotation of the coiler, thus leading to low coiling work efficiency.

[0026] For the existing technical problems, such as Figure 2 The figure shows a flowchart of an embodiment of a strip head positioning coiling method provided by the present invention, including: S1 Before coiling, perform a low-speed reverse operation on the coiler to position the rubber sleeve; S2 In response to the start of strip threading, activate the strip head position calculation program, obtain the initial coiling information, and calculate the strip head position in real time in combination with the initial coiling information; S3 When the strip runs to the outlet of the outlet pinch roll, obtain the measured strip head position data; S4 Based on the comparison and judgment of the measured position data and the real-time calculation result, automatically calibrate the strip head position; S5 Based on the coiling information and the strip head position data after automatic calibration, judge to automatically trigger the forward rotation of the coiler and start automatic coiling.

[0027] Furthermore, it further includes: setting an artificial correction value input window to adjust the strip head position. This step can be after the automatic calibration in S4. If the technician finds that there is still an offset due to problems such as strip slippage after calibration, manual correction can be enabled, allowing the operator to directly input the target offset of the strip head position. The method of the present invention adopts a dynamic comparison between the theoretical calculation value and the actual measurement value, combined with a dual-redundancy mechanism of automatic calibration with a tolerance threshold and manual correction, reducing the system positioning error rate to less than 0.5%, and at the same time ensuring the intervenability under abnormal working conditions.

[0028] Furthermore, in S5, based on the coiling information, obtain the length L1 of one rotation of the rubber sleeve biting area of the coiler mandrel, and calculate the remaining length L2 from the strip head position to the coiler based on the strip head position data after automatic calibration. AsFigure 3 As shown in the figure, the head 22 of the strip steel enters the outlet guide plate 23 through the photoelectric detection device 21. When it is judged that L1 = L2, the coiler is automatically triggered to rotate forward to start automatic coiling. This eliminates the problem of early / late biting caused by traditional fixed-position triggering, improves the alignment accuracy of the biting area between the strip steel head and the sleeve, has good dynamic adaptability, and is suitable for different types of coiler stands.

[0029] Further, in S2, the initial coiling information includes: coil information, coiling pressure, coiling length, coiling quality, running speed of the strip conveyor roller, coiling circumference of the coiler, and distance from the outlet pinch roll to the coiling position.

[0030] Further, in S3, the running speed of the strip and the initial position of the strip head are obtained, and the cumulative displacement of the strip is calculated using a time integration model to perform real-time calculation of the head position.

[0031] Further, in S3, the measured position data of the head is detected and obtained through the photoelectric detection device. As Figure 3 shown, a calibration photoelectric tube is set at the outlet position of the outlet pinch roll to measure the actual position of the head.

[0032] Further, in S4, based on the comparison and judgment of the measured position data and the real-time calculation result, a position tolerance threshold range is set, and when the judgment result is greater than the threshold range, automatic calibration of the head position is performed.

[0033] On the other hand, the present invention also provides a control system for the strip head positioning coiling method to implement the above method. As Figure 4 shown, the control system includes: A drive module 001 configured to perform a low-speed reverse operation on the coiler before coiling to position the rubber sleeve; A calculation module 002 configured to activate the head position calculation program in response to the start of strip threading, obtain the initial coiling information, and perform real-time calculation of the head position in combination with the initial coiling information; A data acquisition module 003 configured to obtain the measured position data of the head when the strip runs to the outlet of the outlet pinch roll; A position calibration module 004 configured to perform automatic calibration of the head position based on the comparison and judgment of the measured position data and the real-time calculation result; A judgment control module 005 configured to judge based on the coiling information and the head position data after automatic calibration to automatically trigger the coiler to rotate forward and start automatic coiling.

[0034] Further, the system further includes: A correction module configured to manually correct to adjust the position of the strip head.

[0035] Furthermore, the control module further controls the strip to stop winding after winding three turns on the coiler.

[0036] The above are the exemplary embodiments disclosed by the present invention. However, it should be noted that various changes and modifications can be made without departing from the scope of the embodiments disclosed by the present invention as defined by the claims. 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 by 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.

[0037] It should be understood that, as used herein, unless the context clearly supports the exception, the singular form "a" is also intended to include the plural form. It should also be understood that the "and / or" used herein refers to any and all possible combinations including one or more of the associated listed items.

[0038] The serial numbers of the disclosed embodiments of the present invention above are only for description and do not represent the superiority or inferiority of the embodiments.

[0039] 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 the embodiments disclosed by the present invention (including the claims) is limited to these examples; under the idea 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 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. A strip head positioning and coiling method, characterized in that: include: S1 performs low-speed reversal operation on the coiler before coiling to position the rubber sleeve; S2 responds to the start of strip threading, activates the strip head position calculation program, obtains the initial coiling information, and calculates the strip head position in real time based on the initial coiling information; S3 When the strip runs to the exit of the exit pinch roller, the actual position data of the strip head is obtained; S4 automatically calibrates the belt head position based on the comparison and judgment of the measured position data and the real-time calculation result; S5 makes a judgment based on the winding information and the tape head position data after automatic calibration to automatically trigger the coiler to rotate forward and start automatic winding.

2. The strip head positioning and coiling method according to claim 1, characterized in that: In S5, the length of one rotation of the rubber sleeve bite area of ​​the winder is obtained based on the winding information as L1, and the remaining length L2 of the head position from the winder is calculated based on the head position data after automatic calibration. When L1=L2, the winder is automatically triggered to rotate forward and automatic winding is started.

3. The strip head positioning and coiling method according to claim 1, characterized in that: In S2, the initial coiling information includes: steel coil information, coiling pressure, coiling length, coiling quality, strip conveying roller running speed, coiling circumference of the coiler, and distance from the exit pinch roller to the coiling position.

4. The strip head positioning and coiling method according to claim 1, characterized in that: In S3, in S2, the running speed of the strip and the initial position of the strip head are obtained, and the cumulative displacement of the strip is calculated using a time integration model to perform real-time calculation of the strip head position.

5. The strip head positioning and coiling method according to claim 1, characterized in that: In S3, the actual position data of the belt head is detected and acquired by a photoelectric detection device.

6. The strip head positioning and coiling method according to claim 1, characterized in that: In S4, a comparison and judgment is performed based on the measured position data and the real-time calculation result, and a position tolerance threshold range is set. When the judgment result is greater than the threshold range, the automatic calibration of the belt head position is performed.

7. The strip head positioning and coiling method according to claim 1, characterized in that: Also includes: Set the manual correction value input window to adjust the strip head position.

8. A control system for a strip head positioning and coiling method, characterized in that: The control system is used to implement the method according to any one of claims 1 to 7, including: a drive module configured to perform a low-speed reversal operation of the coiler for positioning the rubber sleeve before coiling; A calculation module is configured to activate a strip head position calculation program in response to the strip threading start, obtain initial coiling information, and perform real-time calculation of the strip head position in combination with the initial coiling information; A data acquisition module is configured to acquire the actual position data of the strip head when the strip runs to the exit of the exit pinch roller; A position calibration module, configured to automatically calibrate the belt head position based on the comparison and judgment of the measured position data and the real-time calculation result; The judgment control module is configured to make a judgment based on the winding information and the automatically calibrated tape head position data to automatically trigger the coiler to rotate forward and start automatic winding.

9. The control system of the strip head positioning and coiling method according to claim 8, characterized in that: Also includes: The correction module is configured for manual correction to adjust the strip head position.

10. The control system of the strip head positioning and coiling method according to claim 8, characterized in that: The judgment control module further controls the strip to stop winding after winding the strip on the coiler for 3 weeks.

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