Active oil removal device and oil removal method for outlet side of aluminum foil rolling mill

Abstract

The invention relates to the technical field of aluminum foil machining, and discloses an active oil removal device and method for the outlet side of an aluminum foil mill. The active oil removal device comprises a driving roller, mounting plates and connecting plates are rotationally arranged at the two ends of the driving roller correspondingly, drivers for driving the driving roller to rotate are arranged on the mounting plates, and fixing shafts are arranged on the connecting plates; and a cleaning roller capable of being driven by the driving roller is rotationally arranged on the fixing shaft, the driving roller and the cleaning roller are arranged in parallel, and cleaning holes which are evenly distributed are formed in the circumferential side face of the cleaning roller. The top of the memorial archway and the strip on the outlet side are separated through the driving roller and the cleaning roller, the outlet side of the working roller is cleaned in an active wiping cleaning and negative pressure adsorption mode, oil mist and oil drops on the upper side of the strip on the outlet side are adsorbed and cleaned, the strip is prevented from having the oil defect, the strip quality can be improved, and the working efficiency is improved. And the device can detect whether a working roll and a supporting roll of the rolling mill are parallel or not, has multiple functions and is convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum foil processing, and in particular to an active oil removal device and an oil removal method at the outlet side of an aluminum foil rolling mill. Background Art

[0002] During the aluminum foil rolling process, the rolling zone generates significant heat due to intense plastic deformation and friction, necessitating forced cooling using process cooling oil based on 85# kerosene. This cooling system delivers process oil to a spray beam via a clean oil pump (operating pressure 0.45-0.55 MPa), evenly spraying it onto the upper and lower surfaces of the strip inlet, work rolls, and backup rolls, achieving comprehensive thermal management of the rolling system.

[0003] In the current production process, the strip passes through the rolling zone at a high-speed line speed of 600-1000 meters per minute and is coiled. To ensure the yield of subsequent printing / laminating processes, the coiler requires that the upper and lower surfaces of the strip exit section be absolutely free of oil residue. However, there are two major oil contamination risks during the rolling process: 1. After the high-temperature process oil vaporizes, it condenses into droplets on the surface of the top arch of the rolling mill. As it falls, it contaminates the upper surface of the strip on the exit side; 2. The high-speed rotation of the upper support roller will centrifugally eject the residual oil on its surface, directly splashing it onto the upper surface of the strip exit section, thereby contaminating the exit side strip. This contamination causes defects on the surface of the aluminum foil after coiling, reducing product quality and affecting subsequent processes such as printing.

[0004] The existing oil removal methods all involve installing guide plates on the outlet side of the rolling mill to guide the condensed and dripping oil droplets to prevent them from dripping onto the strip. For example, Patent No. CN221269306U discloses an oil removal device for the strip surface of an aluminum foil rolling mill, which mainly passively collects and guides the condensed and dripping oil droplets through a splash guard and a collection trough. However, this passive method of guiding the oil droplets has low oil removal efficiency, and the high-temperature oil and gas will condense in the collection trough and at the bottom of the air duct, thereby dripping onto the strip and contaminating the strip.

[0005] In addition, in a four-high rolling mill, the parallelism between the upper working roll and the upper support roll is crucial. If they are not parallel, not only will the original design intention of the support roll to uniformly support the working roll be destroyed, but the uneven pressure between the rolls will be directly transmitted to the rolling force, resulting in uneven bending deformation of the working roll in the rolling direction, which will cause strip defects such as wave shape (edge ​​wave, middle wave), warping, and scooping, which seriously affect product quality. Therefore, it is usually necessary to check whether the working roll and the support roll are parallel. Since structures such as oil baffles will be installed on the outlet side after the rolling mill is installed, it is usually tested when the rolling mill is installed. If the test is to be carried out after a period of rolling, the oil baffles and other structures need to be removed. After the test is completed, the oil baffles and other structures need to be reinstalled. The operation is cumbersome, time-consuming, and has low work efficiency.

[0006] In summary, the present invention provides an active oil removal device and oil removal method on the outlet side of an aluminum foil rolling mill, which removes oil mist, dripping and thrown-out oil droplets on the outlet side by active wiping cleaning and negative pressure extraction, thereby ensuring the quality of the strip on the outlet side and breaking through the limitations of the existing technology. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the existing defects and provide an active oil removal device and oil removal method on the outlet side of an aluminum foil rolling mill. The top of the arch is separated from the strip on the outlet side by a driving roller and a cleaning roller, and the outlet side of the working roller is cleaned by active wiping cleaning and negative pressure adsorption, and the oil mist and oil droplets on the upper side of the strip on the outlet side are cleaned to avoid oil defects in the strip, which can improve the quality of the strip and can also detect whether the working rollers and support rollers of the rolling mill are parallel. It has diverse functions, simple operation, can save time, improve work efficiency, is easy to use, and can effectively solve the problems in the background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an active oil removal device on the outlet side of an aluminum foil rolling mill, comprising a driving roller, both ends of the driving roller are rotatably provided with a mounting plate and a connecting plate, the mounting plate is provided with a driver for driving the driving roller to rotate, the connecting plate is provided with a fixed shaft, a cleaning roller that can be driven by the driving roller is rotatably provided on the fixed shaft, the driving roller is arranged parallel to the cleaning roller, the circumferential side surface of the cleaning roller is provided with evenly distributed cleaning holes, the fixed shaft is a hollow structure with one end open, and the circumferential side surface of the fixed shaft located inside the cleaning roller is provided with evenly distributed negative pressure holes, and the open end of the fixed shaft is connected to an external negative pressure device, the bottom of the mounting plate is rotatably provided with a telescopic part for controlling the connecting plate to rotate around the central axis of the driving roller, and a movable sleeve on the fixed shaft is provided with a detection ring for detecting whether the working roller and the support roller of the rolling mill are parallel.

[0009] As a preferred technical solution of the present invention, the driver includes a servo motor mounted on a mounting plate, a main pulley is provided on the output shaft of the servo motor, a secondary pulley is provided at one end of the driving roller corresponding to the main pulley, and the main pulley and the secondary pulley are connected by a belt drive.

[0010] As a preferred technical solution of the present invention, the telescopic member is a cylinder, the fixed end of the cylinder is rotatably set on the bottom of the mounting plate, and the telescopic end of the cylinder is rotatably set on the push rod at the bottom of the connecting plate.

[0011] As a preferred technical solution of the present invention, a magnet capable of magnetically attracting the detection ring is provided on the connecting plate.

[0012] As a preferred technical solution of the present invention, the detection ring includes an inner ring, an annular buffer pad is provided on the outer peripheral side of the inner ring, a pressure sensor is installed in the groove of the annular buffer pad, an outer ring is provided on the outer peripheral side of the annular buffer pad, and a polyurethane ring is provided on the outer peripheral side of the outer ring.

[0013] As a preferred technical solution of the present invention, the cleaning roller is a polyurethane roller, and both ends of the cleaning roller are provided with annular grooves with keyways for installing the inner ring, and the inner circumference of the inner ring is provided with a key corresponding to the keyway.

[0014] A method for removing oil from an active oil removal device at the outlet side of an aluminum foil rolling mill, comprising the following steps: S1. When fixing the mounting plate, keep the cleaning roller in contact with the upper working roller of the rolling mill and keep the cleaning roller and the upper working roller parallel to each other, and connect the open end of the fixed shaft to the external negative pressure device through the connecting pipe; S2. Control the servo motor to work. The servo motor drives the main pulley to work. The main pulley drives the secondary pulley to rotate through the belt. The secondary pulley drives the driving roller to rotate. Under the action of friction, the driving roller drives the cleaning roller to rotate on the fixed shaft. The rotating cleaning roller wipes and cleans the peripheral side of the upper working roller. At the same time, under the action of negative pressure, the process oil on the surface of the cleaning roller is extracted by the external negative pressure device through the cleaning hole, the negative pressure hole, and the fixed shaft in sequence; S3. Under the action of the negative pressure device, the oil and gas between the strip on the outlet side of the rolling mill and the cleaning roller are extracted by the external negative pressure device through the cleaning hole, the negative pressure hole and the fixed shaft, so that the space between the strip and the cleaning roller is in a negative pressure environment, preventing the oil and gas on the outlet side from adhering to the strip.

[0015] As a preferred technical solution of the present invention, the driving roller and the cleaning roller form a partition to separate the top of the rolling mill arch from the rolling mill outlet, so that the oil droplets condensed on the top of the rolling mill arch can only drip onto the driving roller or the cleaning roller. During the rotation of the driving roller or the cleaning roller, the cleaning roller performs negative pressure extraction and cleaning on the peripheral side of the driving roller, thereby removing the oil droplets on the driving roller.

[0016] As a preferred technical solution of the present invention, after the strip rolling is completed, the servo motor is controlled to stop working, the inner ring is placed on the annular groove, and the servo motor is controlled to work again to make the cleaning roller rotate one circle, and the cleaning roller drives the detection ring to rotate one circle. During this process, the working roller of the rolling mill squeezes the outer ring through the polyurethane ring, and the outer ring squeezes the pressure sensor, and the maximum value of the pressure sensor is recorded to obtain F 左1 and F 右1 , ΔF 工作辊 =|F 左1 -F 右1 ∣, when ΔF 工作辊 If the value of is within the error range, it means that the working roller is parallel to the cleaning roller. On the contrary, when ΔF工作辊 If the value is not within the error range, it means that the working roller and the cleaning roller are not parallel; Then the servo motor is controlled to stop working and the cylinder is controlled to extend. The cylinder pushes the connecting plate to rotate around the central axis of the driving roller. The connecting plate drives the cleaning roller to rotate and makes the cleaning roller contact with the upper support roller of the rolling mill. The servo motor is controlled to rotate in the opposite direction to make the cleaning roller rotate in the opposite direction for one circle. During this process, the support roller of the rolling mill squeezes the outer ring through the polyurethane ring. The outer ring squeezes the pressure sensor and records the maximum value of the pressure sensor to obtain F. 左2 and F 右2 , ΔF 支撑辊 =|F 左2 -F 右2 ∣, when ΔF 支撑辊 If the value of is within the error range, it means that the support roller is parallel to the cleaning roller. On the contrary, when ΔF 支撑辊 If the value is not within the error range, it means that the support roller and the cleaning roller are not parallel; when the working roller and the support roller are parallel to the cleaning roller, it means that the support roller and the working roller are parallel; on the contrary, if only one of the working roller and the support roller is parallel to the cleaning roller, it means that the support roller and the working roller are not parallel.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. In the example of the present invention, the active oil removal device and oil removal method at the outlet side of the aluminum foil rolling mill are used. The external negative pressure device puts the inside of the cleaning roller in a negative pressure state through a fixed shaft with a negative pressure hole, so that the cleaning roller can put the upper side space of the strip at the outlet side of the rolling mill in a negative pressure environment through the cleaning hole, thereby preventing oil mist from accumulating on the upper surface of the strip at the outlet side.

[0018] 2. The active oil removal device and oil removal method on the outlet side of the aluminum foil rolling mill of the present invention are as follows: the rotating cleaning roller can wipe and clean the working roller, and under the action of negative pressure, the oil droplets on the cleaning roller and the working roller can be extracted in real time to ensure the cleaning effect of the cleaning roller on the working roller.

[0019] 3. In the active oil removal device and oil removal method on the outlet side of the aluminum foil rolling mill of the present invention, the driving roller and the cleaning roller form a partition to separate the top of the mill arch from the mill outlet, so that the oil droplets condensed on the top of the mill arch can only drip onto the driving roller or the cleaning roller. During the rotation of the driving roller or the cleaning roller, the cleaning roller performs negative pressure extraction and cleaning on the peripheral side of the driving roller, thereby removing the oil droplets on the driving roller.

[0020] 4. The active oil removal device and oil removal method at the outlet side of the aluminum foil rolling mill of the present invention are as follows: after the detection rings are installed on both ends of the cleaning roller, when the cleaning roller drives the detection rings to rotate, the pressure sensors at both ends detect the size of the values, which can be used to determine whether the working roller is parallel to the cleaning roller, and whether the support roller is parallel to the cleaning roller, thereby determining whether the support roller and the working roller are parallel.

[0021] 5. The active oil removal device and oil removal method on the outlet side of the aluminum foil rolling mill of the present invention separates the top of the arch from the outlet side strip by a driving roller and a cleaning roller, and uses active wiping cleaning and negative pressure adsorption to clean the outlet side of the working roller, and cleans the oil mist and oil droplets on the upper side of the outlet side strip to avoid oil defects in the strip, which can improve the quality of the strip. It can also detect whether the working rollers and support rollers of the rolling mill are parallel. It has diverse functions, simple operation, can save time, improve work efficiency, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 Schematic diagram of the structure of the fixed shaft in the present invention; Figure 3 Schematic diagram of the structure of the detection ring in the present invention; Figure 4 This is a schematic diagram of the structure of the present invention when used; Figure 5 for Figure 4 Schematic diagram of the front view structure.

[0023] In the figure: 1 mounting plate, 2 driving roller, 21 secondary pulley, 3 fixed shaft, 31 negative pressure hole, 4 cleaning roller, 41 cleaning hole, 42 annular groove, 5 servo motor, 51 main pulley, 52 belt, 6 connecting plate, 61 magnet, 7 cylinder, 8 inner ring, 81 annular buffer pad, 82 pressure sensor, 83 outer ring, 84 polyurethane ring. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-5The present invention provides a technical solution: an active oil removal device at the outlet side of an aluminum foil rolling mill, comprising a driving roller 2, wherein both ends of the driving roller 2 are rotatably provided with a mounting plate 1 and a connecting plate 6, the mounting plate 1 is provided with a driver for driving the driving roller 2 to rotate, and the connecting plate 6 is provided with a fixed shaft 3, and a cleaning roller 4 that can be driven by the driving roller 2 is rotatably provided on the fixed shaft 3, the driving roller 2 is arranged parallel to the cleaning roller 4, and the circumferential side surface of the cleaning roller 4 is provided with evenly distributed cleaning holes 41, the fixed shaft 3 is a hollow structure with one end open, and the circumferential side surface of the fixed shaft 3 located inside the cleaning roller 4 is provided with evenly distributed negative pressure holes 31, and the open end of the fixed shaft 3 is connected to an external negative pressure device, the external negative pressure device puts the inside of the cleaning roller 4 in a negative pressure state through the fixed shaft 3 with the negative pressure holes 31, so that the cleaning roller 4 can put the upper side space of the strip at the outlet side of the rolling mill in a negative pressure environment through the cleaning holes 41, thereby preventing oil mist from accumulating on the upper surface of the strip at the outlet side.

[0026] The rotating cleaning roller 4 can wipe and clean the working roller, and under the action of negative pressure, the oil droplets on the cleaning roller 4 and the working roller can be extracted in real time to ensure the cleaning effect of the cleaning roller 4 on the working roller.

[0027] The bottom of the mounting plate 1 is provided with a telescopic member for controlling the connection plate 6 to rotate around the central axis of the driving roller 2. A detection ring is provided on the movable sleeve of the fixed shaft 3 for detecting whether the working roller and the support roller of the rolling mill are parallel.

[0028] Furthermore, the drive includes a servo motor 5 mounted on the mounting plate 1, a main pulley 51 is provided on the output shaft of the servo motor 5, a secondary pulley 21 is provided at the end of the driving roller 2 corresponding to the main pulley 51, and the main pulley 51 and the secondary pulley 21 are connected by a belt 52.

[0029] The driving roller 2 and the cleaning roller 4 form a partition, isolating the top of the mill arch from the mill outlet, so that the oil droplets condensed on the top of the mill arch can only drip onto the driving roller 2 or the cleaning roller 4. During the rotation of the driving roller 2 or the cleaning roller 4, the cleaning roller 4 performs negative pressure extraction and cleaning on the side surface of the driving roller 2, thereby removing the oil droplets on the driving roller 2.

[0030] Furthermore, the telescopic member is a cylinder 7 , a fixed end of the cylinder 7 is rotatably arranged on the bottom of the mounting plate 1 , and a telescopic end of the cylinder 7 is rotatably arranged on a push rod at the bottom of the connecting plate 6 .

[0031] Furthermore, a magnet 61 capable of magnetically adsorbing the detection ring is provided on the connecting plate 6 . In the non-detection state, the detection ring is magnetically adsorbed on the magnet 61 .

[0032] Furthermore, the detection ring includes an inner ring 8, which can be magnetically attracted to the magnet 61. An annular buffer pad 81 is provided on the outer peripheral side of the inner ring 8. A pressure sensor 82 is installed in the groove of the annular buffer pad 81. An outer ring 83 is provided on the outer peripheral side of the annular buffer pad 81. A polyurethane ring 84 is provided on the outer peripheral side of the outer ring 83. After the detection ring is installed on both ends of the cleaning roller 4, when the cleaning roller 4 drives the detection ring to rotate, the pressure sensors 82 at both ends detect the size of the values, which can be used to determine whether the working roller is parallel to the cleaning roller 4, and whether the support roller is parallel to the cleaning roller 4, thereby determining whether the support roller and the working roller are parallel.

[0033] Furthermore, the cleaning roller 4 is a polyurethane roller to avoid damage to the working roller and the support roller, and both ends of the cleaning roller 4 are provided with an annular groove 42 with a keyway for installing the inner ring 8. The inner circumference of the inner ring 8 is provided with a key corresponding to the keyway to avoid relative rotation between the detection ring and the cleaning roller 4.

[0034] A method for removing oil from an active oil removal device at the outlet side of an aluminum foil rolling mill, comprising the following steps: S1. When fixing the mounting plate 1, keep the cleaning roller 4 in contact with the upper working roll of the rolling mill and keep the cleaning roller 4 parallel to the upper working roll. Connect the open end of the fixed shaft 3 to the external negative pressure device through the connecting pipe. S2. Control the servo motor 5 to work. The servo motor 5 drives the main pulley 51 to work. The main pulley 51 drives the secondary pulley 21 to rotate through the belt 52. The secondary pulley 21 drives the driving roller 2 to rotate. Under the action of friction, the driving roller 2 drives the cleaning roller 4 to rotate on the fixed shaft 3. The rotating cleaning roller 4 wipes and cleans the peripheral side of the upper working roller. At the same time, under the action of negative pressure, the process oil on the surface of the cleaning roller 4 is extracted by the external negative pressure device through the cleaning hole 41, the negative pressure hole 31, and the fixed shaft 3 in sequence; S3. Under the action of the negative pressure device, the oil and gas between the strip on the outlet side of the rolling mill and the cleaning roller 4 are extracted by the external negative pressure device through the cleaning hole 41, the negative pressure hole 31 and the fixed shaft 3, so that the strip and the cleaning roller 4 are in a negative pressure environment, preventing the oil and gas on the outlet side from adhering to the strip.

[0035] Furthermore, the driving roller 2 and the cleaning roller 4 form a partition, isolating the top of the mill arch from the mill outlet, so that the oil droplets condensed on the top of the mill arch can only drip onto the driving roller 2 or the cleaning roller 4. During the rotation of the driving roller 2 or the cleaning roller 4, the cleaning roller 4 performs negative pressure extraction and cleaning on the side surface of the driving roller 2, thereby removing the oil droplets on the driving roller 2.

[0036] Furthermore, after the strip rolling is completed, the servo motor 5 is controlled to stop working, the inner ring 8 is placed on the annular groove 42, and the servo motor 5 is controlled to work again to make the cleaning roller 4 rotate one circle, and the cleaning roller 4 drives the detection ring to rotate one circle. During this process, the working roller of the rolling mill squeezes the outer ring 83 through the polyurethane ring 84, and the outer ring 83 squeezes the pressure sensor 82, and the maximum value of the pressure sensor 82 is recorded to obtain F 左1 and F 右1 , ΔF 工作辊 =|F 左1 -F 右1 ∣, when ΔF 工作辊 If the value of is within the error range, it means that the working roller is parallel to the cleaning roller. On the contrary, when ΔF 工作辊 If the value is not within the error range, it means that the working roller and the cleaning roller are not parallel; In the detection state of the working roll: during the process of the cleaning roller 4 driving the detection ring to rotate one circle, the working roll of the rolling mill squeezes the outer ring 83 on the left side through the polyurethane ring 84 on the left side, and the outer ring 83 on the left side squeezes the corresponding pressure sensor 82, F 左1 is the maximum value of the pressure sensor 82 on the left; similarly, F 右1 is the maximum value of the pressure sensor 82 on the right side; Then, the servo motor 5 is controlled to stop working, and the cylinder 7 is controlled to extend. The cylinder 7 pushes the connecting plate 6 to rotate around the central axis of the driving roller 2. The connecting plate 6 drives the cleaning roller 4 to rotate and makes the cleaning roller 4 contact with the upper support roller of the rolling mill. The servo motor 5 is controlled to rotate in the opposite direction to make the cleaning roller 4 rotate in the opposite direction for one circle. During this process, the support roller of the rolling mill squeezes the outer ring 83 through the polyurethane ring 84. The outer ring 83 squeezes the pressure sensor 82, and the maximum value of the pressure sensor 82 is recorded to obtain F 左2 and F 右2 , ΔF 支撑辊 =|F 左2 -F 右2 ∣, when ΔF 支撑辊 If the value of is within the error range, it means that the support roller is parallel to the cleaning roller. On the contrary, when ΔF 支撑辊 If the value is not within the error range, it means that the support roller and the cleaning roller are not parallel; when the working roller and the support roller are parallel to the cleaning roller, it means that the support roller and the working roller are parallel; on the contrary, if only one of the working roller and the support roller is parallel to the cleaning roller, it means that the support roller and the working roller are not parallel; the device will keep the cleaning roller 4 parallel to the working roller during installation, so during the test, the main test is whether the support roller is parallel to the cleaning roller 4; In the detection state of the support roller: when the cleaning roller 4 drives the detection ring to rotate one circle, the support roller of the rolling mill squeezes the outer ring 83 on the left side through the polyurethane ring 84 on the left side, and the outer ring 83 on the left side squeezes the corresponding pressure sensor 82, F 左2is the maximum value of the pressure sensor 82 on the left; similarly, F 右2 is the maximum value of the pressure sensor 82 on the right.

[0037] The servo motor 5 used in the present invention is a commonly used electrical equipment in the prior art. Its working mode and circuit structure are well-known technologies and will not be elaborated here. The servo motor 5 can control the speed and has very accurate position accuracy. It can convert the voltage signal into torque and speed to drive the control object; the servo motor rotor speed is controlled by the input signal and can respond quickly. In the automatic control system, it is used as an actuator and has the characteristics of small electromechanical time constant and high linearity. It can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft, which is convenient for precise control of the rotation angle of the servo motor 5 during detection.

[0038] The present invention separates the arch top from the outlet strip by means of a driving roller 2 and a cleaning roller 4, and cleans the outlet side of the working roller by means of active wiping cleaning and negative pressure adsorption, and cleans the oil mist and oil droplets on the upper side of the outlet strip, thereby avoiding oil defects in the strip and improving the quality of the strip. It can also detect whether the working rollers and support rollers of the rolling mill are parallel, has multiple functions, can save time, improve work efficiency, and is easy to use.

[0039] Any undisclosed portions of the present invention are prior art, and their specific structures, materials, and operating principles will not be described in detail. Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An active oil removal device at the outlet side of an aluminum foil rolling mill, comprising a drive roller (2), characterized in that: Both ends of the driving roller (2) are rotatably provided with mounting plates (1) and connecting plates (6); a driver for driving the driving roller (2) to rotate is provided on the mounting plate (1); a fixed shaft (3) is provided on the connecting plate (6); a cleaning roller (4) capable of being driven by the driving roller (2) is rotatably provided on the fixed shaft (3); the driving roller (2) and the cleaning roller (4) are arranged in parallel; cleaning holes (41) are evenly distributed on the circumferential side of the cleaning roller (4); the fixed shaft (3) is a hollow structure with one end open, and negative pressure holes (31) are evenly distributed on the circumferential side of the fixed shaft (3) located inside the cleaning roller (4); and the open end of the fixed shaft (3) is connected to an external negative pressure device; a telescopic member for controlling the connecting plate (6) to rotate around the central axis of the driving roller (2) is rotatably provided on the bottom of the mounting plate (1); a detection ring is movably provided on the fixed shaft (3) for detecting whether the working roller and the support roller of the rolling mill are parallel.

2. The active oil removal device at the outlet side of the aluminum foil rolling mill according to claim 1, characterized in that: The driver comprises a servo motor (5) mounted on a mounting plate (1), a main pulley (51) being provided on an output shaft of the servo motor (5), a secondary pulley (21) being provided on an end of the driving roller (2) corresponding to the main pulley (51), and the main pulley (51) and the secondary pulley (21) being connected to each other via a belt (52).

3. The active oil removal device at the outlet of the aluminum foil rolling mill according to claim 2, characterized in that: The telescopic member is a cylinder (7), the fixed end of the cylinder (7) is rotatably arranged on the bottom of the mounting plate (1), and the telescopic end of the cylinder (7) is rotatably arranged on the push rod at the bottom of the connecting plate (6).

4. The active oil removal device at the outlet of the aluminum foil rolling mill according to claim 3, characterized in that: The connecting plate (6) is provided with a magnet (61) capable of magnetically attracting the detection ring.

5. The active oil removal device at the outlet side of the aluminum foil rolling mill according to claim 4, characterized in that: The detection ring comprises an inner ring (8), an annular buffer pad (81) is provided on the outer peripheral side of the inner ring (8), a pressure sensor (82) is installed in the groove of the annular buffer pad (81), an outer ring (83) is provided on the outer peripheral side of the annular buffer pad (81), and a polyurethane ring (84) is provided on the outer peripheral side of the outer ring (83).

6. The active oil removal device at the outlet of the aluminum foil rolling mill according to claim 5, characterized in that: The cleaning roller (4) is a polyurethane roller, and both ends of the cleaning roller (4) are provided with annular grooves (42) with keyways for mounting the inner ring (8), and the inner circumference of the inner ring (8) is provided with a key corresponding to the keyway.

7. A degreasing method based on the active degreasing device at the outlet of an aluminum foil rolling mill according to claim 6, characterized in that: The following steps are involved: S1. When the mounting plate (1) is fixedly mounted, the cleaning roller (4) is kept in contact with the upper working roller of the rolling mill, and the cleaning roller (4) is kept parallel to the upper working roller, and the open end of the fixed shaft (3) is connected to the external negative pressure device through a connecting pipe; S2, control the servo motor (5) to work, the servo motor (5) drives the main pulley (51) to work, the main pulley (51) drives the secondary pulley (21) to rotate through the belt (52), the secondary pulley (21) drives the driving roller (2) to rotate, the driving roller (2) drives the cleaning roller (4) to rotate on the fixed shaft (3) under the action of friction, the rotating cleaning roller (4) wipes and cleans the peripheral side of the upper working roller, and at the same time, under the action of negative pressure, the process oil on the surface of the cleaning roller (4) is extracted by the external negative pressure device through the cleaning hole (41) and the negative pressure hole (31) and the fixed shaft (3) in sequence; S3. Under the action of the negative pressure device, the oil and gas between the strip at the outlet side of the rolling mill and the cleaning roller (4) are extracted by the external negative pressure device through the cleaning hole (41), the negative pressure hole (31), and the fixed shaft (3), thereby placing the strip and the cleaning roller (4) in a negative pressure environment, thereby preventing the oil and gas at the outlet side from adhering to the strip.

8. The oil removal method for the active oil removal device at the outlet side of an aluminum foil rolling mill according to claim 7, characterized in that: The driving roller (2) and the cleaning roller (4) form a partition, isolating the top of the mill arch from the mill outlet, so that the oil droplets condensed on the top of the mill arch can only drip onto the driving roller (2) or the cleaning roller (4). During the rotation of the driving roller (2) or the cleaning roller (4), the cleaning roller (4) performs negative pressure extraction and cleaning on the peripheral side of the driving roller (2), thereby removing the oil droplets on the driving roller (2).

9. The oil removal method for the active oil removal device at the outlet side of an aluminum foil rolling mill according to claim 7, characterized in that: After the strip is rolled, the servo motor (5) is controlled to stop working, the inner ring (8) is placed on the annular groove (42), and the servo motor (5) is controlled to work again, so that the cleaning roller (4) rotates one circle, and the cleaning roller (4) drives the detection ring to rotate one circle. During this process, the working roller of the rolling mill squeezes the outer ring (83) through the polyurethane ring (84), and the outer ring (83) squeezes the pressure sensor (82). The maximum value of the pressure sensor (82) is recorded to obtain F 左1 and F 右1 , ΔF 工作辊 =|F 左1 -F 右1 ∣, when ΔF 工作辊 If the value of is within the error range, it means that the working roller is parallel to the cleaning roller. On the contrary, when ΔF 工作辊 If the value is not within the error range, it means that the working roller and the cleaning roller are not parallel; Then, the servo motor (5) is controlled to stop working, and the cylinder (7) is controlled to extend. The cylinder (7) pushes the connecting plate (6) to rotate around the central axis of the driving roller (2). The connecting plate (6) drives the cleaning roller (4) to rotate, and the cleaning roller (4) is brought into contact with the upper support roller of the rolling mill. The servo motor (5) is controlled to rotate in the reverse direction to make the cleaning roller (4) rotate in the reverse direction one circle. During this process, the support roller of the rolling mill squeezes the outer ring (83) through the polyurethane ring (84). The outer ring (83) squeezes the pressure sensor (82). The maximum value of the pressure sensor (82) is recorded to obtain F 左2 and F 右2 , ΔF 支撑辊 =|F 左2 -F 右2 ∣, when ΔF 支撑辊 If the value of is within the error range, it means that the support roller is parallel to the cleaning roller. On the contrary, when ΔF 支撑辊 If the value is not within the error range, it means that the support roller and the cleaning roller are not parallel; when the working roller and the support roller are parallel to the cleaning roller, it means that the support roller and the working roller are parallel; on the contrary, if only one of the working roller and the support roller is parallel to the cleaning roller, it means that the support roller and the working roller are not parallel.

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