Method for dynamic centering and avoiding the stitching head of an aluminum strip continuous oiling and rolling line
Patent Information
- Application Number
- CN202611110055.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-24
- Publication Date
- 2026-10-20
AI Technical Summary
当缝合头通过时，若未及时处理，凸起的缝合头极易划伤或压伤胶辊表面，形成不可修复的辊面缺陷，并转印至后续正常带材表面，造成批量质量缺陷
[0009]与现有技术相比，本发明具有以下有益效果：本发明通过动态调节挤干辊和托辊，实现铝带材在涂油前后以标准轧制线生产，并通过张力辊组和托辊处的激光测距仪，能够使铝带材在涂油前后避让缝合头，通过PLC控制系统实时校准辊位置，结合挤干辊及托辊动态调整，形成了闭环控制，能够有效防止涂油质量缺陷并降低辊划伤的风险，实现过程简单，改造成本低，具有良好的实用性和推广价值。
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Abstract
Description
Technical Field
[0001] This invention relates to the field of aluminum alloy strip processing and manufacturing, and in particular to a method for dynamic centering and avoiding seam ends in a continuous oiling rolling line for aluminum strip. Background Technology
[0002] In the aluminum strip surface treatment production line, oiling protection is a key process. The strip is conveyed to the oiling machine by the inlet section idler rollers, where the oiling machine applies a process oil film to the upper and lower surfaces. Then, the excess oil mist is squeezed out by the squeeze rollers to form a uniform and stable protective oil film.
[0003] However, the existing production process has the following two problems: Firstly, strip misalignment leads to defects in oiling quality. During continuous production, the strip is prone to deviating from the standard rolling line due to factors such as tension fluctuations. When it enters the oiling machine in a misaligned state, the oil film thickness distribution on the upper and lower surfaces is uneven. At the same time, excessive oil mist condenses in uncoated areas, forming drips and worsening the cleanliness of the work environment and equipment. More importantly, products with uneven oiling require rework, undergoing cleaning, pretreatment, and oiling processes again, resulting in wasted production energy and manufacturing costs.
[0004] Secondly, the seam head poses a risk of equipment damage. To ensure continuous operation, the ends of two rolls of strip are sewn together, forming a seam head with a sudden change in thickness. This seam head travels with the production line to the oiling area. Because the oiling machine has rollers positioned before and after it, during normal production, the support rollers lift the strip to the standard rolling line height, while the squeeze rollers press the strip surface with pressure. When the seam head passes by, if not handled promptly, the protruding seam head can easily scratch or damage the surface of the rollers, creating irreparable roller surface defects. These defects can then transfer to the surface of subsequent normal strip, causing batch quality defects. Currently, the arrival of seam heads relies heavily on temporary manual intervention, lacking a position detection-based avoidance mechanism.
[0005] In summary, existing oiling section control methods are insufficient to simultaneously address the two major challenges of strip misalignment and seam head passage. There is an urgent need for a control method that can automatically adjust relevant actuators (such as idler rollers and squeeze rollers) based on the strip condition (position, thickness, and seam head position) to achieve high-quality, high-efficiency, and low-energy continuous production. Summary of the Invention
[0006] In view of this, the purpose of the present invention is to provide a method for dynamic centering and avoiding seam heads in a continuous strip oiling rolling line, so as to realize the production of aluminum strip on a standard rolling line before and after oiling, and to enable the aluminum strip to avoid seam heads before and after oiling, thereby effectively preventing oiling quality defects and reducing the risk of roll scratches.
[0007] This invention is implemented using the following scheme: A method for dynamic centering and avoiding seam heads in a continuous oiling and rolling line for aluminum strip. The continuous oiling and rolling line includes a PLC control system, an oiling machine, idler rollers and tension rollers located at the inlet side of the oiling machine, and a squeeze roller located at the outlet side of the oiling machine. A displacement sensor A is located beside the idler rollers to detect their position. Displacement sensors B and C are located beside the squeeze rollers to detect the positions of the upper and lower rollers, respectively. Laser rangefinders A for detecting seam heads are located on the drive side and operating side of the tension roller group, respectively. Laser rangefinders B for detecting seam heads are located on the drive side and operating side of the idler rollers, respectively. The method includes the following steps: S1. Parameter preset: The PLC control system acquires the current aluminum strip thickness value t1 and the next roll aluminum strip thickness value t2. The radii of the upper and lower extrusion rolls are R1 and R2, respectively, and the extrusion roll opening degree G. 开 and the maximum downward position G of the lower idler roller 托 ; S2. The roll gap compensation value c is set according to different incoming material requirements, and the target roll gap value G0=t1+c is calculated according to the standard rolling line. S3. Calculate the target height Y of the upper roller axis of the squeeze roll when clamped, using the standard rolling line as the zero point of height. 上 =+(R1+G0 / 2)Target height Y of the lower roller axis of the squeeze roller 下 =-(R2+G0 / 2)When opening symmetrically, let the distance between the axes be C. 开 Then the upper roller axis is at +C 开 / 2, Lower roller shaft center at -C 开 / 2, C 开 =R1+R2+G 开 Substituting into the above formula, we get: the distance the upper roller needs to move downward, H1 = |C 开 / 2-(R1+G0 / 2)|=(G 开 -G0+R2-R1) / 2; The distance the lower roller needs to move upward is H2=|C 开 / 2-(R2+ G0 / 2)|=(G 开 -G0+R1-R2) / 2; S4, displacement sensor B and displacement sensor C detect the actual position H of the upper and lower roller shaft centers in real time. 上 H 下 The PLC control system uses PID closed-loop regulation to make H 上 Approaching the target height Y 上 H 下 Approaching the target height Y 下 Continue until the deviation is less than the allowable error value; S5. The idler roller needs to be moved upwards by a distance H during standard rolling line production. 托0 =G 托-G0 / 2; Displacement sensor A detects the actual position H of the idler roller axis in real time. 托1 The PLC control system uses PID closed-loop regulation to make H 托1 Approaching the target height H 托0 Continue until the deviation is less than the allowable error value; S6. Lock the position and complete the rolling line adjustment; S7. When the laser rangefinder A at the tension roller group detects the stitching head signal, control the idler roller to descend to G. 托 When the laser rangefinder B at the idler roller detects the seam head signal, it controls the oiler to stop oiling and the squeeze roller to loosen the strip, thus avoiding the seam head and preventing damage to the rubber roller.
[0008] Furthermore, in step S7, the laser rangefinder detects the seam head as follows: the change in distance between the laser rangefinder and the surface of the aluminum strip is ΔS. When the laser rangefinder detects the change in distance ΔS three times consecutively within 3 seconds and all of them satisfy ΔS>t1+t2, it means that the seam head has been detected.
[0009] Compared with the prior art, the present invention has the following beneficial effects: The present invention achieves the production of aluminum strip on a standard rolling line before and after oiling by dynamically adjusting the squeeze roller and the idler roller. The laser rangefinder at the tension roller group and the idler roller can ensure that the aluminum strip avoids the seam head before and after oiling. The roller position is calibrated in real time by the PLC control system. Combined with the dynamic adjustment of the squeeze roller and the idler roller, a closed-loop control is formed, which can effectively prevent oiling quality defects and reduce the risk of roller scratches. The process is simple, the modification cost is low, and it has good practicality and promotion value.
[0010] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through specific embodiments and related drawings. Attached Figure Description
[0011] Figure 1 Production layout diagrams before and after the oiling process in this embodiment of the invention; Figure 2 A schematic diagram of the squeezing roller adjustment in an embodiment of the present invention (41 is the clamped state, 42 is the open state). Figure 3 Schematic diagram of idler roller adjustment in an embodiment of the present invention (21 is in the open state); The labels in the diagram are as follows: 1-Tension roller group, 2-Idler roller, 3-Oiler, 4-Squeeze roller, 5-Winding guide roller, 6-Winding machine, 7-Laser rangefinder A, 8-Laser rangefinder B, 9-Displacement sensor A, 10-Displacement sensor B, 11-Displacement sensor C. Detailed Implementation
[0012] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, 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 application pertains.
[0013] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. like Figures 1-3 As shown, a method for dynamic centering and avoiding seam heads in a continuous aluminum strip oiling and rolling line is disclosed. The continuous oiling and rolling line includes a PLC control system, an oiling machine, idler rollers and tension rollers located at the inlet side of the oiling machine, and a squeeze roller located at the outlet side of the oiling machine. A displacement sensor A is located beside the idler rollers to detect their position. Displacement sensors B and C are located beside the squeeze rollers to detect the positions of the upper and lower rollers, respectively. Laser rangefinders A for detecting seam heads are located on the drive side and operating side of the tension roller group, respectively. Laser rangefinders B for detecting seam heads are located on the drive side and operating side of the idler rollers, respectively. The method includes the following steps: S1. Parameter Preset: The PLC control system acquires pre-entered parameters, namely the current aluminum strip thickness t1, the next roll aluminum strip thickness t2, the upper and lower roller radii of the squeeze rolls R1 and R2 respectively, and the squeeze roll opening degree G. 开 and the maximum downward position G of the lower idler roller 托 (i.e., the distance from the roll surface to the standard rolling line); S2. The roll gap compensation value c is set according to different incoming material requirements. The target roll gap value G0 = t1 + c is calculated according to the standard rolling line. The roll gap compensation value c is 0~2mm. The main basis for setting the roll gap compensation value c is: 1. It is set according to the yield strength of different incoming materials. The roll gap compensation value c is inversely proportional to the yield strength (hardness) of the strip. 2. It is set according to the surface quality requirements. For alloys that require a mirror effect or are easily scratched, the c value will also increase accordingly.
[0014] S3. Calculate and adjust the displacement of the squeeze roll: Calculate the target height Y of the upper roll axis when clamped, using the standard rolling line as the zero point of height. 上 =+(R1+G0 / 2)Target height Y of the lower roller axis of the squeeze roller 下 =-(R2+G0 / 2)When opening symmetrically, let the distance between the axes be C. 开 Then the upper roller axis is at +C 开 / 2, Lower roller shaft center at -C 开 / 2, C 开 =R1+R2+G 开 Substituting into the above formula, we get: the distance the upper roller needs to move downward, H1 = |C 开 / 2-(R1+G0 / 2)|=(G 开 -G0+R2-R1) / 2; The distance the lower roller needs to move upward is H2=|C 开 / 2-(R2+ G0 / 2)|=(G 开 -G0+R1-R2) / 2, the specifics can be combined with Figure 2 ; S4, displacement sensor B and displacement sensor C detect the actual position H of the upper and lower roller shaft centers in real time. 上 H 下 The PLC control system uses PID closed-loop regulation to make H 上 Approaching the target height Y 上 H 下 Approaching the target height Y 下 Continue this process until the deviation is less than the allowable error value, which is generally ≤0.05mm; S5. The idler roller needs to be moved upwards by a distance H during standard rolling line production. 托0 =G 托 -G0 / 2; Displacement sensor A detects the actual position H of the idler roller axis in real time. 托1 The PLC control system uses PID closed-loop regulation to make H 托1 Approaching the target height H 托0 Continue until the deviation is less than the allowable error value, generally ≤2mm. Specific values can be determined by referring to relevant regulations. Figure 3 ; S6, Lock position, that is, lock the hydraulic cylinder of the actuator of the idler roller and the squeezing roller. The control system issues a command to make the corresponding valve group lock the current position and complete the rolling line adjustment; S7. Avoid the seam head when connecting the next coil of aluminum strip after the current coil production is completed: When the laser rangefinder A at the tension roller group detects the seam head signal, control the idler roller to descend to G. 托 When the laser rangefinder B at the idler roller detects the seam head signal, it controls the oiler to stop oiling and the squeeze roller to loosen the strip, thus avoiding the seam head and preventing damage to the rubber roller.
[0015] In this embodiment, the laser rangefinder detects the stitch head in step S7 as follows: the change in distance between the laser rangefinder and the surface of the aluminum strip is ΔS. When the laser rangefinder detects the change in distance ΔS three times in a row within 3 seconds and all of them satisfy ΔS>t1+t2, it means that the stitch head has been detected.
[0016] By dynamically adjusting the squeeze rollers and idler rollers as described above, aluminum strip can be produced on a standard rolling line before and after oiling. The laser rangefinders at the tension roller group and idler rollers ensure that the aluminum strip avoids the seam head before and after oiling. The PLC control system calibrates the roller position in real time. Combined with the dynamic adjustment of the squeeze rollers and idler rollers, a closed-loop control is formed, which can effectively prevent oiling quality defects and reduce the risk of roller scratches. The process is simple, the modification cost is low, and it has good practicality and promotion value. Unless otherwise stated, if any of the technical solutions disclosed in this invention specify a numerical range, then the disclosed numerical range is a preferred numerical range. Anyone skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this invention discloses only some numerical values to illustrate the technical solutions of this invention. Furthermore, the numerical values listed above should not constitute a limitation on the scope of protection of this invention.
[0017] If this invention discloses or relates to mutually fixedly connected components or structural parts, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).
[0018] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.
[0019] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.
[0020] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.
Claims
1. A method for dynamic centering and avoiding seam heads in a continuous oiling and rolling line for aluminum strip, the continuous oiling and rolling line comprising a PLC control system, an oiling machine, idler rollers and tension rollers located on the inlet side of the oiling machine, and squeeze rollers located on the outlet side of the oiling machine, characterized in that: A displacement sensor A is located beside the idler roller to detect its position; displacement sensors B and C are located beside the squeeze roller to detect the positions of the upper and lower squeeze rollers, respectively; laser rangefinders A for detecting the seam head are located on the drive side and the operating side of the tension roller assembly; laser rangefinders B for detecting the seam head are located on the drive side and the operating side of the idler roller, respectively; the method includes the following steps: S1. Parameter preset: The PLC control system acquires the current aluminum strip thickness value t1 and the next roll aluminum strip thickness value t2. The radii of the upper and lower extrusion rolls are R1 and R2, respectively, and the extrusion roll opening degree G. 开 and the maximum downward position G of the lower idler roller 托 ; S2. The roll gap compensation value c is set according to different incoming material requirements, and the target roll gap value G0 = t1 + c is calculated according to the standard rolling line. S3. Calculate the target height Y of the upper roller axis of the squeeze roll when clamped, using the standard rolling line as the zero point of height. 上 =+(R1+G0 / 2)Target height Y of the lower roller axis of the squeeze roller 下 =-(R2+G0 / 2)When opening symmetrically, let the distance between the axes be C. 开 Then the upper roller axis is at +C 开 / 2, Lower roller shaft center at -C 开 / 2, C 开 =R1+R2+G 开 Substituting into the above formula, we get: the distance the upper roller needs to move downward, H1 = |C 开 / 2-(R1+G0 / 2)|=(G 开 -G0+R2-R1) / 2; The distance the lower roller needs to move upward is H2=|C 开 / 2-(R2+ G0 / 2)|=(G 开 -G0+R1-R2) / 2; S4, displacement sensor B and displacement sensor C detect the actual position H of the upper and lower roller shaft centers in real time. 上 H 下 The PLC control system uses PID closed-loop regulation to make H 上 Approaching the target height Y 上 H 下 Approaching the target height Y 下 Continue until the deviation is less than the allowable error value; S5. The idler roller needs to be moved upwards by a distance H during standard rolling line production. 托0 =G 托 -G0 / 2; Displacement sensor A detects the actual position H of the idler roller axis in real time. 托1 The PLC control system uses PID closed-loop regulation to make H 托1 Approaching the target height H 托0 Continue until the deviation is less than the allowable error value; S6. Lock the position and complete the rolling line adjustment; S7. When the laser rangefinder A at the tension roller group detects the stitching head signal, control the idler roller to descend to G. 托 When the laser rangefinder B at the idler roller detects the seam head signal, it controls the oiler to stop oiling and the squeeze roller to loosen the strip, thus avoiding the seam head and preventing damage to the rubber roller.
2. The method for dynamic centering and avoiding seam heads in a continuous oiling rolling line for aluminum strip according to claim 1, characterized in that: In step S7, the laser rangefinder detects the seam head as follows: The change in distance between the laser rangefinder and the surface of the aluminum strip is ΔS. When the laser rangefinder detects the change in distance ΔS three times in a row within 3 seconds and all of them satisfy ΔS>t1+t2, it means that the seam head has been detected.