Cold-rolled steel coil bundling centering method and system
Patent Information
- Application Number
- CN202511555419.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-29
- Publication Date
- 2025-12-12
Smart Images
Figure CN121106844A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of cold-rolled baling technology, and in particular to a method and system for baling a pair of cold-rolled coils. BACKGROUND
[0002] The cold-rolled company's pickling mill unit is the first process of cold rolling. After a coil is produced by automatic shearing, the coil is placed in the baling position for baling after being unloaded and transported.
[0003] Reference Figure 1 The produced coil is transported to the step beam No. 1 saddle by a coil trolley, and then transported to the step beam No. 4 saddle (baling position) for baling.
[0004] The coil is automatically baled at the No. 4 saddle. The baling band is required to be baled in two passes according to the thickness and strength requirements, i.e., the thickness is greater than or equal to 2.0 mm or the yield strength is greater than or equal to 400 Mpa, and the baling band is baled in one pass otherwise. The number of baling band passes of the baling machine is automatically controlled. When the baling band is baled in one pass, the baling band is in the center of the coil (i.e., the position of the center line of the coil), and when the baling band is baled in two passes, the baling band is 20 mm left and right of the center line, and the baling band is baled in sequence from the transverse direction of the baling machine, as shown in FIG. 21, which is a baling schematic diagram of the baling machine 21. Figure 2
[0005] When baling, the baling machine 21 is first transversely moved from the original position to the baling position. For example, when the baling band is baled in one pass, the baling machine is moved to the center of the coil, and the baling is completed according to the steps of abutting the arm, filling the baling band, pressing the baling head, tightening the baling band, joint engagement, shearing, and returning to the original position.
[0006] Different specifications of the coil may cause occasional abnormalities of the outer circle of the coil during shearing, such as tail deformation and loose outer circle. In addition, mechanical wear of the baling band guide groove of the baling machine, the entire filling and tightening process of the baling band, and the size difference of the coil diameter may all cause baling abnormalities. Even if the baling is completed, the baling band will not be in the center line position. When the baling band is not in the center line position, the baling band will be broken, affecting the subsequent processes such as hoisting and transportation.
[0007] In the prior art, research on baling is mainly focused on the baling method or the material of the baling band, and no relevant literature is found for the baling center. Therefore, how to effectively solve the problem of the baling center of the baling machine is still a difficult point in the current technical research. SUMMARY
[0008] To solve or partially solve the technical problem of strapping misalignment in existing technologies, this invention provides a method and system for aligning cold-rolled steel coils by bundling. It improves the strapping alignment problem by starting with the bundling machine, designs a strapping alignment auxiliary device in the automatic bundling process to increase the alignment guidance function of the bundling machine, and innovatively optimizes the automatic bundling process to solve the problem of misalignment to the greatest extent, thus enabling effective alignment of the strapping.
[0009] To address the aforementioned technical problems, a first aspect of the present invention discloses a method for bundling and centering cold-rolled steel coils, the method comprising: Collect the outer diameter of the cold-rolled steel coil; Based on the outer diameter of the steel coil, the actual filling length of the strapping is determined proportionally from the original filling length. During the strapping process, the strapping is pulled out according to the actual strapping length, and the strapping is aligned with the preset bundling position of the cold-rolled steel coil under the centering action of the strapping centering auxiliary device; wherein, the strapping centering auxiliary device is set on both sides of the single or double insert arm in the bundling machine, and the strapping centering auxiliary device guides and centers the cold-rolled steel coil to the preset bundling position; wherein, the preset bundling position is specifically the center line of the steel coil or both sides of the center line of the steel coil; During the tightening process, the straps are tightened in a set tightening sequence, and the straps are tightened at the preset bundling position under the centering action of the strap centering auxiliary device.
[0010] Optionally, determining the actual filling length of the strapping based on the outer diameter of the steel coil, proportionally from the original filling length, specifically includes: If the outer diameter of the steel coil is within the first outer diameter range, the original filling length is directly used as the actual filling length; If the outer diameter of the steel coil is within the second outer diameter range, the actual filling length is determined according to the first ratio of the original filling length. If the outer diameter of the steel coil is located in the third outer diameter range, the actual filling length is determined according to the second ratio of the original filling length. Wherein, the second ratio is less than the first ratio, and the first outer diameter interval, the second outer diameter interval, and the third outer diameter interval decrease sequentially.
[0011] Optionally, the formula for calculating the length of the strap alignment auxiliary device includes:
[0012] in, L This indicates the length of the strap alignment auxiliary device. L ∈[ L min ,L max ];in, L min This indicates the minimum set length, which is determined by the maximum radius of the cold-rolled steel coil. L max This indicates the maximum set length, which is determined by the minimum radius of the cold-rolled steel coil. d This indicates the distance between the installation point of the strap alignment auxiliary device and the center line of the saddle. This indicates the height of the installation point of the strap alignment auxiliary device. r The radius of the cold-rolled steel coil is 1 / 2 of its outer diameter. k This indicates the degree of inclination of the straight line formed by the strapping centering auxiliary device in the centering direction within a two-dimensional coordinate system centered on the center of the cold-rolled steel coil. b This represents the intercept of the straight line formed by the strap centering auxiliary device in the centering direction. x , y The coordinates of the intersection point between the straight line formed by the strapping centering auxiliary device in the centering direction and the outer ring of the cold-rolled steel coil are indicated. Optionally, the strapping centering auxiliary device includes parallel rod-shaped members, which are respectively disposed on both sides of the insert arm and guide and center the cold-rolled steel coil to a preset bundling position, so that the strapping is aligned with the preset bundling position under the centering action of the strapping centering auxiliary device after being pulled out from the insert arm.
[0013] Optionally, the length of the strap alignment auxiliary device is fixed, and the actual fixed length does not exceed the minimum set length; or, the strap alignment auxiliary device is telescopic. Optionally, if the strapping centering auxiliary device is telescopic, after determining the actual filling length of the strapping from the original filling length based on the outer diameter of the steel coil, the method further includes: Input the outer diameter of the steel coil into the length calculation formula to determine the target length of the strapping centering auxiliary device; The strapping centering auxiliary device is controlled to extend and retract relative to the preset strapping position of the cold-rolled steel coil according to the target length.
[0014] Optionally, controlling the extension and retraction of the strapping centering auxiliary device relative to the preset bundling position of the cold-rolled steel coil according to the target length specifically includes: According to the target length, the strapping centering auxiliary device is controlled to extend a first length relative to the preset bundling position of the cold-rolled steel coil, so that a second length is reserved between the strapping centering auxiliary device and the preset bundling position of the cold-rolled steel coil; wherein, the sum of the first length and the second length is the target length.
[0015] Optionally, the top of the strap alignment aid is covered with a flexible material.
[0016] Optionally, the step of tightening the straps according to a set tightening sequence specifically includes: The strapping is tightened in the following order: tightening on the first side of the baler, tightening on the second side of the baler, and tightening on both sides of the baler.
[0017] A second aspect of the present invention discloses a system for bundling and centering cold-rolled steel coils, comprising: The acquisition unit is used to acquire the outer diameter of cold-rolled steel coils; The determining unit is used to determine the actual filling length of the strapping from the original filling length proportionally based on the outer diameter of the steel coil; The filling and threading unit is used to extract the strapping according to the actual filling and threading length during the filling and threading process, and to align the strapping with the preset bundling position of the cold-rolled steel coil under the centering action of the strapping centering auxiliary device; wherein, the strapping centering auxiliary device is set on both sides of the single or double side insert arm in the bundling machine, and the strapping centering auxiliary device guides and centers the cold-rolled steel coil to the preset bundling position; wherein, the preset bundling position is specifically the center line of the steel coil or both sides of the center line of the steel coil; The tightening unit is used to tighten the straps in a set tightening sequence during the tightening process, and to tighten the straps at the preset bundling position under the centering action of the strap centering auxiliary device.
[0018] Through one or more technical solutions of the present invention, the present invention has the following beneficial effects or advantages: The technical solution of this invention involves acquiring the outer diameter of the cold-rolled steel coil; determining the actual filling length of the strapping tape proportionally from the original filling length based on the outer diameter of the steel coil; and flexibly adjusting the actual filling length of the strapping tape by referring to the outer diameter of the steel coil, thus eliminating the misalignment caused by the lack of coil diameter differentiation in the entire filling strapping tape process. Furthermore, a strapping tape centering auxiliary device is provided on one or both sides of the strapping machine's insert arm, which aligns the strapping tape with the preset strapping position of the cold-rolled steel coil after it is pulled out, thus centering the strapping tape in advance. In addition, during the tightening process, the strapping tape is tightened in a set tightening sequence, distributing the free force on the strapping tape during the tightening process, achieving a controllable tightening effect, eliminating uncontrollable defects in the tightening process, and further strengthening the guiding centering of the strapping tape through the strapping tape centering auxiliary device to tighten the strapping tape at the preset strapping position. This invention enhances the centering guidance function of the baler by designing a strapping centering auxiliary device in the automatic baling process, and innovatively optimizes the automatic baling process to solve the problem of misaligned baling to the greatest extent, enabling effective centering of the strapping.
[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description
[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic diagram of the existing steel coil transportation process is shown; Figure 2 A schematic diagram of a prior art baling machine is shown; Figure 3 A flowchart of a method for bundling and centering cold-rolled steel coils according to an embodiment of the present invention is shown; Figure 4 A comparative schematic diagram of the filling and strapping of large-diameter and small-diameter steel coils in the prior art is shown; Figures 5A-5B This diagram illustrates a case of misalignment in bundling in the prior art. Figures 6A-6B A schematic diagram showing the position of a strapping centering auxiliary device on one side of a baler according to an embodiment of the present invention is provided. Figure 7 A logical schematic diagram of the length calculation of a strap alignment auxiliary device according to an embodiment of the present invention is shown; Figure 8 A schematic diagram of the strap distribution tightening according to an embodiment of the present invention is shown; Figure 9 A schematic diagram of a centerline laser marking according to an embodiment of the present invention is shown; Figure 10 A schematic diagram of a system for bundling and aligning cold-rolled steel coils according to an embodiment of the present invention is shown.
[0021] Explanation of reference numerals in the attached drawings: baler 21, baling head 211, left insert arm 212, right insert arm 213, walking beam 22, strapping 23, strapping centering auxiliary device 24, center line laser device 25. Detailed Implementation
[0022] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
[0023] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
[0024] Firstly, such as Figure 3 As shown, the method for bundling and centering cold-rolled steel coils provided in this embodiment of the invention includes at least the following steps: S301, collect the outer diameter of the cold-rolled steel coil.
[0025] In particular, after the cold-rolled steel coil is sheared by a flying shear, depending on the different shearing speeds (between 60-300m / min), the automatic positioning of the tail will produce occasional deviations from the slack of the outer ring of the steel coil, resulting in abnormal conditions on the outer ring during uncoiling.
[0026] Therefore, before collecting the outer diameter of the cold-rolled steel coil, monitor whether there are any abnormalities in the outer ring of the cold-rolled steel coil; if not, then collect the outer diameter of the cold-rolled steel coil. If so, for example, there are conditions such as strip tail deformation or loose outer ring, cut off the outer ring, and then collect the outer diameter of the cold-rolled steel coil.
[0027] The data collection methods include, but are not limited to, caliper measurement, laser rangefinder measurement, machine vision measurement, and ultrasonic measurement.
[0028] S302, based on the outer diameter of the steel coil, determine the actual filling length of the strapping proportionally from the original filling length.
[0029] In the specific implementation process, if the outer diameter of the steel coil is in the first outer diameter range, the original filling length is directly used as the actual filling length; if the outer diameter of the steel coil is in the second outer diameter range, the actual filling length is determined according to the first proportion of the original filling length; if the outer diameter of the steel coil is in the third outer diameter range, the actual filling length is determined according to the second proportion of the original filling length.
[0030] In a specific example, see Table 1, which is the automatic control table for filling and threading straps.
[0031] Table 1
[0032] The second ratio is smaller than the first ratio, and the first outer diameter interval, the second outer diameter interval, and the third outer diameter interval decrease sequentially. As the outer diameter gradually decreases, the automatic control charging time also gradually decreases.
[0033] In existing technology, the entire filling and threading of the strapping is automatically controlled, without distinction based on roll diameter. See [link / reference] Figure 4 This is a comparative diagram of the filling and binding of large-diameter and small-diameter steel coils in existing technologies.
[0034] Among them, the walking beam 22 transports the large-diameter steel coils and the small-diameter steel coils to the No. 4 saddle for bundling.
[0035] After the left and right insert arms 212 and 213 of the baler 21 are connected in the lateral direction, since there is no difference in coil diameter during the entire strapping process, even if the specifications of large-diameter steel coils and small-diameter (outer diameter of steel coil less than or equal to 1400mm) are different, the strapping will be fully loaded when the entire frame of the baler 21 is fixed. With this design, the baling head 211 in the baler 21 has a larger downward stroke than the small-diameter steel coil, resulting in more strapping allowance after compression. This increases the free space of the strapping, making it more prone to misalignment when it adheres to the steel coil, and thus more likely to cause misalignment during strapping. For example... Figures 5A-5B This is a schematic diagram of misalignment in existing bundling technology. The strapping 23 may become misaligned in both the first and second bundling processes.
[0036] In this technical solution, by flexibly adjusting the actual filling length of the strapping by referring to the outer diameter of the steel coil and filling the strapping according to the actual filling length, the misalignment of the bundle caused by the defect that the entire filling strapping has no difference in coil diameter can be eliminated. This is especially effective for small diameter steel coils in correcting misalignment.
[0037] S303, during the process of filling and threading the strapping, the strapping is pulled out according to the actual filling length, and the strapping is aligned with the preset bundling position of the cold-rolled steel coil under the centering action of the strapping centering auxiliary device.
[0038] When the strapping is being filled, the strapping machine pulls the strapping out from both sides of the insert arm and fills the outer side of the steel coil completely.
[0039] To correct the deviation of the strapping, a strapping centering auxiliary device is installed on both sides of the single or double-sided insert arm in the baler. If a strapping centering auxiliary device is designed in the double-sided insert arm, the two strapping centering auxiliary devices have the same structure. Specifically, the strapping centering auxiliary device is used to guide and center the cold-rolled steel coil to the preset bundling position. The preset bundling position is specifically the center line of the steel coil or both sides of the center line of the steel coil.
[0040] See Figures 6A-6BThis is a schematic diagram of the single-sided position of the strapping centering auxiliary device 24 in the baler.
[0041] In this example, the strapping alignment auxiliary device 24 is disposed on both sides of the left sidewall 212 of the baler 21 in the transverse direction and is perpendicular to the left sidewall 212. The fixing method includes, but is not limited to, welding, screwing, etc.
[0042] In one example, the strapping centering aid 24 includes two parallel rods fixed to the two sides of the insert arm and guided to the preset bundling position of the cold-rolled steel coil for centering, so that the strapping 23 is pulled out from the left insert arm 212 and aligned with the preset bundling position under the centering action of the strapping centering aid 24.
[0043] Optionally, the strapping centering auxiliary device 24 is a rod-shaped member of fixed length, which is set on both sides of the insert arm and guides and centers the cold-rolled steel coil to the preset bundling position.
[0044] Optionally, the strap alignment auxiliary device 24 is a retractable rod-shaped component. For example, a hydraulic transmission mechanism can be installed in the rod-shaped component to control its retraction and extension via hydraulic means. Alternatively, the retraction and extension of the rod-shaped component can be controlled by incorporating a mechanical screw and nut structure, an electromagnetic telescopic structure, or similar means.
[0045] In an optional example, since the strap alignment aids 24 are located on both sides of the left sidewall 212, the left sidewall 212 will open to both sides when the strap is pulled out, facilitating the removal of the strap. To avoid obstructing the opening of the left sidewall 212, the strap alignment aids 24 are provided with a distance of 15mm-20mm on both sides of the left sidewall 212 to facilitate the opening of the left sidewall 212 to release the strap.
[0046] The above is a structural description of the strapping centering auxiliary device 24. Since the length of the strapping centering auxiliary device 24 will also affect the strapping centering effect, the following describes the calculation method of the length of the strapping centering auxiliary device 24.
[0047] Specifically, the formula for calculating the length of the strapping alignment auxiliary device includes:
[0048] in, L Indicates the length of the strap alignment auxiliary device. L ∈[ L min , L max ];in, L min This indicates the minimum set length, which is determined by the maximum radius of the cold-rolled steel coil. L maxThis indicates the maximum set length, which is determined by the minimum radius of the cold-rolled steel coil. d This indicates the distance between the installation point of the strap alignment auxiliary device and the center line of the saddle. This indicates the height of the installation point of the strap alignment auxiliary device. r This indicates the radius of the cold-rolled steel coil, which is half the outer diameter of the coil. k This indicates the degree of inclination of the straight line formed by the strapping centering auxiliary device in the centering direction within a two-dimensional coordinate system centered on the center of the cold-rolled steel coil. b This indicates the intercept of the straight line formed by the strap centering auxiliary device in the centering direction. x , y () represents the coordinates of the intersection point between the straight line formed by the strapping centering auxiliary device in the centering direction and the outer ring of the cold-rolled steel coil. The coordinates vary depending on the location of the intersection point. x , y () may be negative. See Figure 7 This is a logical diagram illustrating the calculation of the length of the strap alignment auxiliary device.
[0049] Taking the strapping centering auxiliary device 24 set on one side of the baler 21 as an example, the strapping centering auxiliary device 24 is set on both sides of the left side wall 212 of the baler 21 in the transverse direction and is perpendicular to the left side wall 212.
[0050] A two-dimensional coordinate system is constructed with the center point of the cold-rolled steel coil as the center.
[0051] Among them, the strapping centering auxiliary device extends a straight line in the direction of guide centering and intersects with the outermost edge of the cold-rolled steel coil, and the coordinates of the intersection point are obtained. x , y Due to the degree of inclination of the straight line extending from the strap alignment auxiliary device in the direction of guide alignment in the two-dimensional coordinate system. k ,intercept b Radius of cold-rolled steel coil r The distance between the installation point of the strap alignment auxiliary device and the center line of the saddle. d The height of the installation point of the strap alignment auxiliary device Given that the length range of the strapping centering auxiliary device can be calculated using the above formula, the correct length range can be determined. L As can be seen from the above formula, the length of the strapping centering auxiliary device changes with the outer diameter of the cold-rolled steel coil.
[0052] The outer diameter of cold-rolled steel coils Under this constraint, the length limitation range of the strapping centering auxiliary device can be determined: [ L min , Lmax ];in, L min This indicates the minimum set length, which is determined by the maximum radius of the cold-rolled steel coil. L max This indicates the maximum set length, which is determined by the minimum radius of the cold-rolled steel coil.
[0053] In one optional example, the length of the strapping centering aid is fixed. If the strapping centering aid is a rod-shaped component of fixed length, regardless of the outer diameter of the steel coil, the strapping will be aligned with the preset bundling position of the cold-rolled steel coil under the guiding centering action of the strapping centering aid. In this case, the actual fixed length of the strapping centering aid does not exceed the minimum set length to prevent the strapping centering aid from colliding with the outer ring of the steel coil when the baler moves laterally.
[0054] Furthermore, when setting the actual fixed length according to the calculated minimum set length, it can be set according to the logic of actual fixed length + safety distance = minimum set length. Here, the safety distance is [0, 100], and the actual fixed length is [minimum set length - 100, minimum set length]. For example, if the minimum set length is 310mm, then the actual fixed length of the strap alignment auxiliary device is set to 210mm, with a 100mm safety distance reserved.
[0055] It is worth noting that although the reserved safety distance may exceed 100mm when bundling small-diameter steel coils, actual verification shows that because the strapping process is extremely rapid, the alignment at the moment of strapping withdrawal is crucial. The alignment effect of the strapping alignment auxiliary device at the moment of strapping withdrawal is sufficient to correct deviations, guiding the strapping towards the preset bundling position. Therefore, the reserved safety distance has a relatively small impact on the alignment effect of the strapping and ensures that the strapping alignment auxiliary device will not come into contact with the outer side of the steel coil, causing scratches. Thus, after testing, it was found that even with a fixed length, the strapping alignment auxiliary device will not deviate in alignment effect due to the outer diameter, and this design is applicable to the alignment of steel coils of any outer diameter.
[0056] Of course, to improve the centering effect for steel coils with different outer diameters, in an optional example, the strapping centering aid is retractable. If the strapping centering aid is retractable, after executing S303, the outer diameter of the steel coil is input into the length calculation formula to determine the target length of the strapping centering aid. The strapping centering aid is then controlled to extend or retract relative to the preset bundling position of the cold-rolled steel coil according to the target length.
[0057] For example, if the target length of the strapping centering auxiliary device calculated from the outer diameter of the previous cold-rolled steel coil is 150, then the strapping centering auxiliary device is controlled to extend or retract to 150 to accommodate the bundling of the next cold-rolled steel coil. If the target length of the strapping centering auxiliary device calculated from the outer diameter of the next cold-rolled steel coil is 200, then the strapping centering auxiliary device is controlled to extend or retract from 150 or the initial position to 200 to accommodate the bundling of the previous cold-rolled steel coil.
[0058] In the specific implementation process, according to the target length, the strapping centering auxiliary device is extended by a first length relative to the preset bundling position of the cold-rolled steel coil, so that a second length is reserved between the strapping centering auxiliary device and the preset bundling position of the cold-rolled steel coil; wherein, the sum of the first length and the second length is the target length.
[0059] For example, if the reserved safety distance (i.e., the second length) is set to 50mm, and the target length of the strapping centering auxiliary device calculated from the outer diameter of the previous cold-rolled steel coil is 150mm, then the strapping centering auxiliary device is controlled to extend or retract to 100mm, reserving a 50mm safety distance to accommodate the bundling of the previous cold-rolled steel coil. If the target length of the strapping centering auxiliary device calculated from the outer diameter of the subsequent cold-rolled steel coil is 200mm, then the strapping centering auxiliary device is controlled to extend or retract from 100mm or the initial position to 150mm, reserving a 50mm safety distance to accommodate the bundling of the subsequent cold-rolled steel coil. Of course, different second lengths can be reserved for steel coils with different outer diameters.
[0060] In the above technical solution, the extension and retraction of the strapping centering auxiliary device is controlled according to different target lengths for steel coils with different outer diameters, which can realize personalized centering control for different steel coils and improve the centering effect for different steel coils.
[0061] In an optional example, to prevent the strapping centering aid from scratching the outside of the steel coil when it comes into contact with the outside of the coil, the top of the strapping centering aid is covered with a flexible material.
[0062] After the strapping is filled, the bundling head is controlled to press down and the subsequent strapping tightening steps are performed.
[0063] S304, during the tightening process, the straps are tightened in a set tightening sequence, and the straps are tightened to the preset bundling position under the centering action of the strap centering auxiliary device.
[0064] Specifically, based on the tightening trajectory of the strapping around the entire outer ring of the steel coil, the strapping extraction process is a near-circular process. The previous one-time, time-controlled tightening is changed to a three-step extraction and tightening: the strapping is tightened in the order of tightening on the first side of the baler, tightening on the second side of the baler, and then tightening on both sides of the baler. By distributing the tightening, the free force on the strapping is dispersed during the tightening process, achieving controllable tightening. For example...Figure 8 The diagram shown is a schematic of the strap distribution and tightening. The distribution method is shown in Table 2.
[0065] Table 2
[0066] During the distributed tightening process, each tightening is controlled according to the tightening duration, and there is a time interval between two adjacent tightenings.
[0067] In an optional example, a centerline laser device 25 is added to the No. 4 saddle of the walking beam to perform centering mark detection, thereby detecting the centering effect of the strapping and providing feedback on steel coils with centering abnormalities, such as... Figure 9 The image shown is a schematic diagram of the centerline laser marking.
[0068] To better illustrate and explain the present invention, specific examples are used below.
[0069] In this example, considering that the second tightening in the distributed tightening process is the most critical, a strapping centering auxiliary device is only installed on the left side of the baler's lateral movement direction, and this device is designed as a retractable rod. The steel coil is bundled once, with the preset bundling position being the exact center of the coil.
[0070] During uncoiling, check whether the outer ring of the cold-rolled steel coil has loose coils or wrinkles. If so, cut off the outer ring.
[0071] The cold-rolled steel coils are transported to saddle number 4 by a coil trolley. It is worth noting that the cold-rolled steel coils stop at a fixed position on saddle number 4.
[0072] The outer diameter of cold-rolled steel coils is measured using laser measurement, and the actual filling length of the strapping and the target length of the strapping centering auxiliary device are determined accordingly.
[0073] The baler moves laterally from its original position to the baling position, so that the insert arm is directly in the center of the steel coil.
[0074] Insertion arm docking.
[0075] Fill with straps.
[0076] During the filling and threading of the strapping, the strapping centering auxiliary device is controlled to extend and retract along the center of the steel coil according to the target length. The strapping is then pulled out according to the actual filling length, and the centering action of the strapping centering auxiliary device aligns the strapping with the center of the cold-rolled steel coil.
[0077] After the strapping is filled, the bundling head will be pressed down and then the strapping will be tightened.
[0078] During the tightening process, the strapping is tightened in the following order: tightening from the right side of the baler, tightening from the left side of the baler, and then tightening from both sides of the baler. When tightening the strapping from the left side, the strapping is tightened to the exact center of the steel coil by the centering action of the strapping centering auxiliary device.
[0079] Connector engagement.
[0080] Cutting.
[0081] The laser centerline marker added to the No. 4 saddle of the walking beam is used to monitor whether the strapping is in the exact center of the steel coil. If it is, the entire process ends. If not, an abnormal steel coil is reported.
[0082] The solution in this invention improves the strapping alignment problem by starting with the baling machine. A strapping alignment auxiliary device is designed into the automatic baling process to enhance the baling machine's alignment guidance function. The automatic baling process is innovatively optimized. During the strapping filling process, the actual filling length of the strap is flexibly adjusted by referring to the outer diameter of the steel coil, and the strap is filled according to the actual filling length. This eliminates the misalignment caused by the lack of differentiation in coil diameter during the entire strapping filling process. During the strapping tightening process, the straps are tightened according to a set tightening sequence, distributing the free force on the straps during the tightening process, achieving a controllable tightening effect and eliminating uncontrollable defects in the strapping during the tightening process. Furthermore, by eliminating outer ring abnormalities and using centerline laser marking after baling to monitor whether the strap is in the exact center of the steel coil, the problem of misalignment is solved to the greatest extent, enabling effective strapping alignment.
[0083] Secondly, based on the same inventive concept as the method for bundling and centering cold-rolled steel coils provided in the first aspect of the embodiments described above, the present invention also provides a system for bundling and centering cold-rolled steel coils, see [link to documentation]. Figure 10 ,include: The acquisition unit 1001 is used to acquire the outer diameter of the cold-rolled steel coil; The determining unit 1002 is used to determine the actual filling length of the strapping according to the outer diameter of the steel coil, proportionally from the original filling length. The filling and threading unit 1003 is used to extract the strapping according to the actual filling and threading length during the filling and threading process, and to align the strapping with the preset bundling position of the cold-rolled steel coil under the centering action of the strapping centering auxiliary device; wherein, the strapping centering auxiliary device is set on both sides of the single or double side insert arm in the bundling machine, and the strapping centering auxiliary device guides and centers the cold-rolled steel coil to the preset bundling position; wherein, the preset bundling position is specifically the center line of the steel coil or both sides of the center line of the steel coil; The tightening unit 1004 is used to tighten the straps in a set tightening sequence during the tightening process, and to tighten the straps at the preset bundling position under the centering action of the strap centering auxiliary device.
[0084] It should be noted that the specific methods by which each module performs operations in the cold-rolled steel coil bundling and alignment system provided in the embodiments of the present invention have been described in detail in the method embodiments provided in the first aspect above. The specific implementation process can be referred to the method embodiments provided in the first aspect above, and will not be described in detail here.
[0085] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.
[0086] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.
Claims
1. A method for bundling and centering cold-rolled steel coils, characterized in that, The method includes: Collect the outer diameter of the cold-rolled steel coil; Based on the outer diameter of the steel coil, the actual filling length of the strapping is determined proportionally from the original filling length. During the strapping process, the strapping is pulled out according to the actual strapping length, and the strapping is aligned with the preset bundling position of the cold-rolled steel coil under the centering action of the strapping centering auxiliary device; wherein, the strapping centering auxiliary device is set on both sides of the single or double insert arm in the bundling machine, and the strapping centering auxiliary device guides and centers the cold-rolled steel coil to the preset bundling position; wherein, the preset bundling position is specifically the center line of the steel coil or both sides of the center line of the steel coil; During the tightening process, the straps are tightened in a set tightening sequence, and the straps are tightened at the preset bundling position under the centering action of the strap centering auxiliary device.
2. The method as described in claim 1, characterized in that, The step of determining the actual filling length of the strapping according to the outer diameter of the steel coil and proportionally from the original filling length specifically includes: If the outer diameter of the steel coil is within the first outer diameter range, the original filling length is directly used as the actual filling length; If the outer diameter of the steel coil is within the second outer diameter range, the actual filling length is determined according to the first ratio of the original filling length. If the outer diameter of the steel coil is located in the third outer diameter range, the actual filling length is determined according to the second ratio of the original filling length. Wherein, the second ratio is less than the first ratio, and the first outer diameter interval, the second outer diameter interval, and the third outer diameter interval decrease sequentially.
3. The method as described in claim 1, characterized in that, The formula for calculating the length of the strapping alignment auxiliary device includes: in, L This indicates the length of the strap alignment auxiliary device. L ∈[ L min , L max ];in, L min This indicates the minimum set length, which is determined by the maximum radius of the cold-rolled steel coil. L max This indicates the maximum set length, which is determined by the minimum radius of the cold-rolled steel coil. d This indicates the distance between the installation point of the strap alignment auxiliary device and the center line of the saddle. This indicates the height of the installation point of the strap alignment auxiliary device. r The radius of the cold-rolled steel coil is 1 / 2 of its outer diameter. k This indicates the degree of inclination of the straight line formed by the strapping centering auxiliary device in the centering direction within a two-dimensional coordinate system centered on the center of the cold-rolled steel coil. b This represents the intercept of the straight line formed by the strap centering auxiliary device in the centering direction. x , y The coordinates of the intersection point between the straight line formed by the strapping centering auxiliary device in the centering direction and the outer ring of the cold-rolled steel coil are indicated.
4. The method as described in claim 3, characterized in that, The strapping centering auxiliary device includes parallel rod-shaped members, which are respectively arranged on both sides of the insert arm and guide and center the cold-rolled steel coil to the preset bundling position, so that the strapping is aligned with the preset bundling position under the centering action of the strapping centering auxiliary device after being pulled out from the insert arm.
5. The method as described in claim 3, characterized in that, The length of the strap alignment auxiliary device is fixed, and the actual fixed length does not exceed the minimum set length; or, the strap alignment auxiliary device is extendable.
6. The method as described in claim 5, characterized in that, If the strapping centering auxiliary device is telescopic, after determining the actual filling length of the strapping from the original filling length based on the outer diameter of the steel coil, the method further includes: Input the outer diameter of the steel coil into the length calculation formula to determine the target length of the strapping centering auxiliary device; The strapping centering auxiliary device is controlled to extend and retract relative to the preset strapping position of the cold-rolled steel coil according to the target length.
7. The method as described in claim 6, characterized in that, The step of controlling the extension and retraction of the strapping centering auxiliary device relative to the preset strapping position of the cold-rolled steel coil according to the target length specifically includes: According to the target length, the strapping centering auxiliary device is controlled to extend a first length relative to the preset bundling position of the cold-rolled steel coil, so that a second length is reserved between the strapping centering auxiliary device and the preset bundling position of the cold-rolled steel coil; wherein, the sum of the first length and the second length is the target length.
8. The method as described in claim 1, characterized in that, The top of the strap alignment auxiliary device is covered with flexible material.
9. The method as described in claim 1, characterized in that, The step of tightening the straps according to a set tightening sequence specifically includes: The strapping is tightened in the following order: tightening on the first side of the baler, tightening on the second side of the baler, and tightening on both sides of the baler.
10. A system for bundling and centering cold-rolled steel coils, characterized in that, include: The acquisition unit is used to acquire the outer diameter of cold-rolled steel coils; The determining unit is used to determine the actual filling length of the strapping from the original filling length proportionally based on the outer diameter of the steel coil; The filling and threading unit is used to extract the strapping according to the actual filling and threading length during the filling and threading process, and to align the strapping with the preset bundling position of the cold-rolled steel coil under the centering action of the strapping centering auxiliary device; wherein, the strapping centering auxiliary device is set on both sides of the single or double side insert arm in the bundling machine, and the strapping centering auxiliary device guides and centers the cold-rolled steel coil to the preset bundling position; wherein, the preset bundling position is specifically the center line of the steel coil or both sides of the center line of the steel coil; The tightening unit is used to tighten the straps in a set tightening sequence during the tightening process, and to tighten the straps at the preset bundling position under the centering action of the strap centering auxiliary device.