Roller compaction real-time deviation correction online feeding control device and working method

Abstract

The application relates to an online feeding control device for roll compaction real-time deviation correction and a working method, which comprises a first material replacing mechanism and a second material replacing mechanism, the first material replacing mechanism and the second material replacing mechanism both comprise U-shaped bases, lifting seats are slidably installed at two ends of the U-shaped bases, a first outer shaft base is movably installed in one of the lifting seats, a second outer shaft base is fixedly installed in the other lifting seat, inner shaft bases provided with multi-edge grooves are rotatably installed in the inner sides of the first outer shaft base and the second outer shaft base, a roll material is wound on the outer side of a roll shaft, and multi-edge shafts connected with the multi-edge grooves of the inner shaft bases are installed at the two ends of the roll shaft; the application realizes high-precision real-time deviation correction, automatic alignment of new and old rolls and roll replacement synchronous following, and ensures that the roll material unwinding process is stable and reliable.

Description

Technical Field

[0001] This invention relates to the field of lithium battery processing technology, and in particular to a real-time roller correction online feeding control device and its working method. Background Technology

[0002] In continuous production processes such as lithium battery electrode rolling, metal foil processing, and thin film coating, unwinding of rolls is a critical step.

[0003] During the unwinding process, the coil material is prone to deviation due to factors such as drum installation misalignment, uneven coil end faces, and tension fluctuations, leading to quality problems in subsequent processes such as wrinkles, stacking, and uneven edges. Existing technologies for online material control have the following shortcomings: Lagging correction response: Traditional correction devices mostly use passive correction or contact detection, which have a slow response speed and cannot track changes in the end face of the coil in real time, resulting in untimely correction. Difficulty in aligning when changing rolls: When changing between old and new rolls, it is difficult to achieve precise alignment due to differences in roll thickness and installation position deviations, which can easily lead to misalignment after splicing. Insufficient detection accuracy: The use of mechanical contact rods or photoelectric switches to detect the edge of the roll material results in low accuracy, is greatly affected by the vibration of the roll material, and cannot achieve micron-level correction control; Low material changing efficiency: Traditional material changing requires manual adjustment of the drum position, which is time-consuming and labor-intensive, affecting the continuous operation of the production line; Limited functionality: Existing equipment can only correct the deviation of a single roll of material, and cannot achieve synchronous following and alignment of new and old rolls. The machine needs to be stopped for adjustment when changing rolls. Summary of the Invention

[0004] The present invention addresses the problem of providing a real-time roller correction online feeding control device and working method, thereby solving the technical problems of delayed correction response, difficulty in roll changing alignment, and low detection accuracy in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A real-time roll forming correction online material control device includes a first material changing mechanism and a second material changing mechanism for changing between new and old roll materials. Both the first and second material changing mechanisms include a U-shaped base. Lifting seats are slidably installed at both ends of the U-shaped base. A first outer shaft seat is movably installed on the inner side of one of the lifting seats, and a second outer shaft seat is fixedly installed on the inner side of the other lifting seat. Both the first and second outer shaft seats have inner shaft seats with polygonal grooves rotatably installed on their inner sides. The roll material is wound on the outside of the roll drum, and polygonal shafts that are connected to the polygonal grooves of the inner shaft seats are installed at both ends of the roll drum. Another lifting seat has a lifting plate slidably mounted on it. A fixed cylinder is mounted on the bottom side of the lifting plate. A movable column is elastically mounted on the bottom end of the fixed cylinder. A ball bearing is mounted on the bottom side of the movable column and contacts the top side of the coil. A right-angle arm is mounted on the bottom end of the movable column. A grating sensor and a laser rangefinder sensor facing the end of the coil are mounted on the right-angle arm.

[0006] Preferably, the U-shaped base has sliding grooves at both ends, and a threaded rod is rotatably installed in the sliding groove. The threaded rod is threadedly connected to the lifting seat. The U-shaped base has a first slide rail vertically installed at both ends, and the lifting seat has a first guide groove adapted to the first slide rail.

[0007] Preferably, the bottom end of the threaded rod is equipped with a synchronous pulley inside the U-shaped base, and the two synchronous pulleys are connected by a synchronous belt drive, with one of the synchronous pulleys connected to the motor output end.

[0008] Preferably, a first pneumatic cylinder is symmetrically mounted on the outer side of one of the lifting seats, and the telescopic end of the first pneumatic cylinder is connected to the first outer shaft seat.

[0009] Preferably, a second pneumatic cylinder is installed in both the first and second outer shaft seats, and the telescopic end of the second pneumatic cylinder is located in the polygonal groove of the inner shaft seat, where a polygonal limiting plate is rotatably mounted on the bearing.

[0010] Preferably, a side groove is provided on another lifting seat, and a third pneumatic cylinder is installed on the other lifting seat. The telescopic end of the third pneumatic cylinder is located in the side groove and connected to the lifting plate. A second slide rail is provided on the inner wall of the side groove, and a second guide groove adapted to the second slide rail is provided on the lifting plate.

[0011] Preferably, the fixed cylinder has an inner cavity, and a spring is installed in the inner cavity, the spring being connected to the movable column.

[0012] Preferably, the grating sensor includes a transmitter and a receiver, and the transmitter and receiver are respectively mounted on the right-angle arms of the first material changing mechanism and the second material changing mechanism, and the transmitter and receiver are arranged opposite to each other.

[0013] A method for operating a real-time roller correction online feeding control device, the specific operation steps of which are as follows: Step 1: Hoist the roll with the material wound onto the U-shaped base. Polygonal shafts are installed at both ends of the roll. Align the polygonal shafts with the polygonal grooves on the inner shaft seat, and activate the first pneumatic cylinder. The first pneumatic cylinder drives the first outer shaft seat to move until the polygonal shaft of the roll is fully inserted into the inner shaft seat, and the end of the polygonal shaft contacts the polygonal limiting plate of the inner shaft seat. The first material changing mechanism loads the old roll that is currently in operation, and the second material changing mechanism loads the new roll to be used. The lifting seats of both material changing mechanisms are in the upper limit position, so that the balls are separated from the surface of the roll. Step Two: The third pneumatic cylinder is activated, and its telescopic end pushes the lifting plate vertically downward along the side groove. The second slide rail on the inner wall of the side groove cooperates with the second guide groove on the lifting plate to ensure the straightness and stability of the lifting plate during descent. When the lifting plate descends, it drives the fixed cylinder, movable column, ball bearings, and right-angle arm to descend as a whole. When the ball bearings contact the top surface of the coil, the movable column is subjected to a reaction force and begins to contract into the inner cavity of the fixed cylinder. The spring installed in the inner cavity is compressed, generating an upward elastic reaction force. This spring force keeps the ball bearings in close contact with the surface of the coil. When the ball bearings make stable contact, the third pneumatic cylinder stops descending and maintains its current position. At this time, the movable column is in a state of compression equilibrium. At the same time as the ball bearings contact the coil, the right-angle arm follows the movable column to descend into position, allowing the laser rangefinder and grating sensor installed on it to enter the working position. The probe of the laser rangefinder is facing the end of the coil. Step 3: The motor of the second material changing mechanism starts, driving the synchronous pulley to rotate. The synchronous pulley transmits power to the two threaded rods through the synchronous belt. The two threaded rods rotate synchronously in the slide groove. The threaded rods are threadedly connected to the lifting seat, driving the lifting seat to rise and fall vertically along the first slide rail. During the rising and falling process, the grating sensor continues to work until the transmitter and receiver of the grating sensor of the first and second material changing mechanisms are at the same horizontal height, realizing the docking of the transmitter and receiver. Step 4: The laser rangefinder of the first material changing mechanism emits a laser beam, which illuminates the outermost end face of the old roll and measures the straight-line distance from the end face to the sensor, which is recorded as the first distance value. The laser rangefinder of the second material changing mechanism emits a laser beam, which illuminates the outermost end face of the new roll and measures the straight-line distance from the end face to the sensor, which is recorded as the second distance value. When the first distance value and the second distance value are equal, the mechanism remains stationary. When there is a difference between the first distance value and the second distance value, the second pneumatic cylinder of the second material changing mechanism pushes the polygonal limit plate to move, realizing the lateral movement of the roll until the first distance value and the second distance value are equal. At this time, the outermost end faces of the new roll and the old roll are precisely aligned. Step 5: The laser rangefinders of the first and second material changing mechanisms operate continuously during the unwinding process, monitoring the distance from the outermost end face of the old roll to the laser rangefinder at high frequency in real time. The second pneumatic cylinder offsets the roll, ensuring that the first distance value is always equal to the set distance value, thus ensuring that the roll runs along the correct axial position during unwinding and preventing deviation. While the first material changing mechanism performs real-time correction, the second material changing mechanism performs a synchronous following function. The second pneumatic cylinder of the second material changing mechanism drives the roll to move, and at the same time, the lifting seat of the second material changing mechanism descends. The transmitter and receiver of the grating sensor remain in a facing state to ensure that the end face positions of the new and old rolls are always consistent, and that the top sides of the new and old rolls are at the same height. The tape splicing device is activated, splicing the head of the new roll with the tail of the old roll, releasing the old roll and fixing it, and switching the unwinding task to the new roll. The new roll begins to unwind normally.

[0014] The beneficial effects of this invention are: High-precision real-time deviation correction ensures unwinding stability: Laser ranging provides real-time monitoring, using a laser ranging sensor to non-contactly detect the position of the roll end face. The detection accuracy is high and unaffected by roll vibration, achieving micron-level real-time deviation correction; Active deviation correction control, the second pneumatic cylinder adjusts the axial position of the drum in real time based on the feedback signal from the laser ranging sensor. The deviation correction response is fast, ensuring that the roll always runs along the correct axial position during unwinding, effectively preventing deviation. Automatic alignment of new and old rolls for seamless roll changing: Precise height alignment is achieved by mounting the transmitter and receiver of the grating sensor on the right-angle arms of the first and second material changing mechanisms, respectively. Adjustment via the lifting seat ensures precise alignment of the top sides of the new and old rolls, guaranteeing that both rolls are on the same horizontal plane during splicing. Synchronized end-face positions are achieved by using laser rangefinders to measure the distance from the outermost end face of both the new and old rolls to the sensor. The second pneumatic cylinder laterally adjusts the position of the new roll, achieving precise end-face alignment with high accuracy. Roll changing is uninterrupted: After alignment, the splicing device can automatically splice the rolls online without stopping the machine, ensuring continuous production line operation and improving production efficiency. Synchronous following function for seamless material changeover: Real-time synchronous following ensures that while the first material changer corrects deviation in real time, the second material changer moves synchronously. The grating sensor always maintains a facing state to ensure that the end faces of the new and old rolls are always in the same position. Height synchronous control: The lifting seat and the second pneumatic cylinder work together to ensure that the new roll maintains a completely synchronized position with the running old roll in the standby state, eliminating the need for secondary adjustments during roll splicing. Smooth and reliable switching: The tension fluctuation is small during roll change, resulting in high splicing quality and avoiding problems such as roll breakage and deviation caused by roll changeover. Elastic detection mechanism protects the surface of the coil: The elastic contact design allows the ball bearings to be elastically installed in the fixed cylinder via springs, making elastic contact with the surface of the coil and avoiding damage from rigid contact. This is especially suitable for materials with high surface quality requirements, such as lithium battery electrodes. Self-adaptive fit: The elastic force provided by the springs ensures that the ball bearings always maintain close contact with the surface of the coil, automatically adapting to changes in coil diameter and surface unevenness, ensuring that the detection mechanism is always in the optimal working position. Smooth and reliable guidance: The lifting plate is guided by the second slide rail and the second guide groove, ensuring smooth lifting and high straightness, and ensuring accurate positioning of the laser rangefinder and grating sensor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall first structure of the present invention; Figure 2 This is a schematic diagram of the overall second structure of the present invention; Figure 3 This is a first sectional view of the present invention; Figure 4 This is a second cross-sectional view of the present invention.

[0016] Legend: 1. First material changing mechanism; 2. Second material changing mechanism; 3. U-shaped base; 4. Lifting seat; 5. First outer shaft seat; 6. Second outer shaft seat; 7. Inner shaft seat; 8. Drum; 9. Polygonal shaft; 10. Lifting plate; 11. Fixed cylinder; 12. Movable column; 13. Ball bearing; 14. Right angle arm; 15. Laser rangefinder sensor; 16. Grating sensor; 17. Slide groove; 18. Threaded rod; 19. First pneumatic cylinder; 20. Second pneumatic cylinder; 21. Polygonal limit plate; 22. Side groove; 23. Third pneumatic cylinder; 24. Inner cavity; 25. Spring. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Specific implementation examples are given below.

[0019] See Figures 1-4A real-time correction roller feeding control device includes a first material changing mechanism 1 and a second material changing mechanism 2 for changing old and new rolls of material. Both the first material changing mechanism 1 and the second material changing mechanism 2 include a U-shaped base 3. Lifting seats 4 are slidably installed at both ends of the U-shaped base 3. Slide grooves 17 are opened at both ends of the U-shaped base 3. Threaded rods 18 are rotatably installed in the slide grooves 17 and are threadedly connected to the lifting seats 4. First slide rails are vertically arranged at both ends of the U-shaped base 3. First guide grooves adapted to the first slide rails are opened on the lifting seats 4. Synchronous pulleys are installed at the bottom end of the threaded rods 18 inside the U-shaped base 3. The two synchronous pulleys are connected by a synchronous belt drive. One of the synchronous pulleys is connected to the output end of the motor. The two threaded rods 18 achieve precise synchronous rotation through the synchronous belt and synchronous pulleys, ensuring that the lifting height of the lifting seats 4 at both ends is completely consistent, and avoiding the tilting of the roll 8 due to asynchrony. One of the lifting seats 4 has a first outer shaft seat 5 movably installed on its inner side, and a first pneumatic cylinder 19 symmetrically installed on the outer side of the other lifting seat 4. The telescopic end of the first pneumatic cylinder 19 is connected to the first outer shaft seat 5. A second outer shaft seat 6 is fixedly installed on the inner side of the other lifting seat 4. Both the first outer shaft seat 5 and the second outer shaft seat 6 have an inner shaft seat 7 with a polygonal groove rotatably installed on their inner sides. The roll material is wound on the outer side of the roll 8, and both ends of the roll 8 are equipped with polygonal shafts 9 that are connected to the polygonal grooves of the inner shaft seat 7. A second pneumatic cylinder 20 is installed in both the first outer shaft seat 5 and the second outer shaft seat 6. The telescopic end of the second pneumatic cylinder 20 is located in the polygonal groove of the inner shaft seat 7 and a polygonal limiting plate 21 is rotatably installed on its inner side. The first pneumatic cylinder 19 drives the first outer shaft seat 5 to move, realizing the quick insertion and separation of the polygonal shaft 9 of the roll 8 and the inner shaft seat 7. The second pneumatic cylinder 20 pushes the polygonal limiting plate 21 to move, which can precisely adjust the axial position of the roll 8. The adjustment accuracy can reach 0.05mm, realizing micron-level position adjustment. A lifting plate 10 is slidably mounted on another lifting seat 4. A side groove 22 is provided on the other lifting seat 4. A third pneumatic cylinder 23 is mounted on the other lifting seat 4. The telescopic end of the third pneumatic cylinder 23 is located within the side groove 22 and connected to the lifting plate 10. A second slide rail is provided on the inner wall of the side groove 22. A second guide groove adapted to the second slide rail is provided on the lifting plate 10. A fixed cylinder 11 is mounted on the bottom side of the lifting plate 10. A movable column 12 is elastically mounted on the bottom end of the fixed cylinder 11. The bottom side of the movable column 12 is... The device is equipped with ball bearings 13 that contact the top side of the coil. A right-angle arm 14 is mounted at the bottom of the movable column 12. A grating sensor 16 and a laser rangefinder 15 facing the end of the coil are mounted on the right-angle arm 14. An inner cavity 24 is opened inside the fixed cylinder 11, and a spring 25 is installed inside the inner cavity 24. The spring 25 is connected to the movable column 12. The grating sensor 16 includes a transmitter and a receiver, and the transmitter and receiver are respectively mounted at the right angle of the first material changing mechanism 1 and the second material changing mechanism 2. On arm 14, with the transmitter and receiver positioned opposite each other, ball bearing 13 is elastically mounted inside fixed cylinder 11 via spring 25, making elastic contact with the surface of the roll material to avoid rigid collision damage to the roll material surface. This is suitable for materials with high surface quality requirements, such as lithium battery electrode sheets. The elastic force provided by spring 25 ensures that ball bearing 13 always maintains close contact with the surface of the roll material, automatically adapting to changes in roll material diameter and surface unevenness, ensuring that the detection mechanism is always in the optimal working position. When the movable column 12 contacts the roll material, it can retract into the inner cavity 24, and the compression of spring 25 generates buffer, preventing impact damage to the sensor and the roll material. Laser rangefinder 15 non-contactly detects the position of the roll material end face, with a detection accuracy of up to 0.01mm, unaffected by roll material vibration, achieving micron-level real-time detection. The transmitter and receiver of grating sensor 16 are respectively mounted on right-angle arms 14 of the first material changing mechanism 1 and the second material changing mechanism 2, positioned opposite each other, which can accurately detect whether the top side height of the new and old rolls is consistent, with high alignment accuracy.

[0020] Working principle: The roll 8 with the wound material is hoisted above the U-shaped base 3. Polygonal shafts 9 are installed at both ends of the roll 8. The polygonal shafts 9 are aligned with the polygonal grooves on the inner shaft seat 7. The first pneumatic cylinder 19 is activated. The first pneumatic cylinder 19 drives the first outer shaft seat 5 to move until the polygonal shafts 9 of the roll 8 are fully inserted into the inner shaft seat 7, and the end of the polygonal shaft 9 contacts the polygonal limiting plate 21 of the inner shaft seat 7. The first material changing mechanism 1 is loaded with the old roll that is in operation, and the second material changing mechanism 2 is loaded with the new roll to be used. The lifting seats 4 of both material changing mechanisms are in the upper limit position, so that the balls 13 are separated from the surface of the roll material. The third pneumatic cylinder 23 is activated, and its telescopic end pushes the lifting plate 10 to descend vertically along the side groove 22. The second slide rail set on the inner wall of the side groove 22 cooperates with the second guide groove on the lifting plate 10 to ensure the straightness and stability of the lifting plate 10 during the descent. When the lifting plate 10 descends, it drives the fixed cylinder 11, the movable column 12, the ball bearing 13 and the right-angle arm 14 to descend as a whole. When the ball bearing 13 contacts the top side surface of the coil, the movable column 12 is subjected to a reaction force and begins to contract into the inner cavity 24 of the fixed cylinder 11. The spring 25 installed in the inner cavity 24 is compressed, generating an upward elastic reaction force. The spring 25 keeps the ball 13 in close contact with the surface of the coil. When the ball 13 is in stable contact, the third pneumatic cylinder 23 stops descending and maintains its current position. At this time, the movable column 12 is in a state of compression balance. At the same time as the ball 13 contacts the coil, the right-angle arm 14 follows the movable column 12 down to its position, so that the laser rangefinder 15 and the grating sensor 16 mounted on it enter the working position. The probe of the laser rangefinder 15 is facing the end of the coil. The motor of the second material changing mechanism 2 starts, driving the synchronous pulley to rotate. The synchronous pulley transmits power to the two threaded rods 18 through the synchronous belt. The two threaded rods 18 rotate synchronously in the slide groove 17. The threaded rods 18 are threadedly connected to the lifting seat 4, driving the lifting seat 4 to rise and fall vertically along the first slide rail. During the rising and falling process, the grating sensor 16 continues to work until the transmitter and receiver of the grating sensor 16 of the first material changing mechanism 1 and the second material changing mechanism 2 are at the same horizontal height, realizing the docking of the transmitter and receiver. The laser rangefinder 15 of the first material changing mechanism 1 emits a laser beam, which illuminates the outermost end face of the old roll and measures the straight-line distance from the end face to the sensor, which is recorded as the first distance value. The laser rangefinder 15 of the second material changing mechanism 2 emits a laser beam, which illuminates the outermost end face of the new roll and measures the straight-line distance from the end face to the sensor, which is recorded as the second distance value. When the first distance value and the second distance value are equal, the mechanism remains stationary. When there is a difference between the first distance value and the second distance value, the second pneumatic cylinder 20 of the second material changing mechanism 2 pushes the polygonal limit plate 21 to move, thereby realizing the lateral movement of the roll 8 until the first distance value and the second distance value are equal. At this time, the outermost end faces of the new roll and the old roll are precisely aligned. The laser rangefinder 15 of the first material changing mechanism 1 and the second material changing mechanism 2 works continuously during the unwinding process, monitoring the distance from the outermost end face of the old roll to the laser rangefinder 15 in real time at a high frequency. The second pneumatic cylinder 20 is used to offset the roll 8, and the first distance value is always adjusted to be equal to the set distance value to ensure that the roll material always runs along the correct axial position during the unwinding process and to prevent deviation. While the first material changing mechanism 1 performs real-time correction, the second material changing mechanism 2 performs synchronous following function. The second pneumatic cylinder 20 of the second material changing mechanism 2 drives the roll 8 to move, and at the same time, the lifting seat 4 of the second material changing mechanism 2 descends. The transmitter and receiver of the grating sensor 16 always maintain a facing state to ensure that the end face positions of the new and old rolls are always consistent. At the same time, the top side height of the new roll and the old roll are consistent. The tape splicing device is activated, splicing the material head of the new roll with the material tail of the old roll, releasing the roll 8 of the old roll and fixing it, and switching the unwinding task to the new roll. The new roll begins to unwind normally.

[0021] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A real-time roller pressing correction online feeding control device, characterized in that, The device includes a first material changing mechanism (1) and a second material changing mechanism (2) for changing old and new coil materials. Both the first material changing mechanism (1) and the second material changing mechanism (2) include a U-shaped base (3). Lifting seats (4) are slidably installed at both ends of the U-shaped base (3). A first outer shaft seat (5) is movably installed on the inner side of one of the lifting seats (4), and a second outer shaft seat (6) is fixedly installed on the inner side of the other lifting seat (4). Both the first outer shaft seat (5) and the second outer shaft seat (6) are rotatably mounted with inner shaft seats (7) with polygonal grooves. The coil material is wound on the outside of the drum (8), and polygonal shafts (9) that are connected to the polygonal grooves of the inner shaft seats (7) are installed at both ends of the drum (8). Another lifting seat (4) is slidably mounted with a lifting plate (10), a fixed cylinder (11) is mounted on the bottom side of the lifting plate (10), a movable column (12) is elastically mounted on the bottom end of the fixed cylinder (11), a ball bearing (13) is mounted on the bottom side of the movable column (12), and the ball bearing (13) contacts the top side of the coil. A right-angle arm (14) is mounted on the bottom end of the movable column (12), and a grating sensor (16) and a laser rangefinder sensor (15) facing the end of the coil are mounted on the right-angle arm (14).

2. The roller pressing real-time correction online feeding control device according to claim 1, characterized in that, The U-shaped base (3) has a sliding groove (17) at both ends inside. A threaded rod (18) is rotatably installed in the sliding groove (17). The threaded rod (18) is threadedly connected to the lifting seat (4). The U-shaped base (3) has a first slide rail vertically installed at both ends inside. The lifting seat (4) has a first guide groove adapted to the first slide rail.

3. The roller pressing real-time correction online feeding control device according to claim 2, characterized in that, The bottom end of the threaded rod (18) is located inside the U-shaped base (3) and a synchronous pulley is installed. The two synchronous pulleys are connected by a synchronous belt drive, and one of the synchronous pulleys is connected to the output end of the motor.

4. The roller pressing real-time correction online feeding control device according to claim 3, characterized in that, One of the lifting seats (4) is symmetrically equipped with a first pneumatic cylinder (19) on its outer side, and the telescopic end of the first pneumatic cylinder (19) is connected to the first outer shaft seat (5).

5. The roller pressing real-time correction online feeding control device according to claim 4, characterized in that, A second pneumatic cylinder (20) is installed in both the first outer shaft seat (5) and the second outer shaft seat (6). The telescopic end of the second pneumatic cylinder (20) is located in the polygonal groove of the inner shaft seat (7) and a polygonal limiting plate (21) is rotatably installed on the bearing.

6. The roller pressing real-time correction online feeding control device according to claim 5, characterized in that, Another lifting seat (4) is provided with a side groove (22), and a third pneumatic cylinder (23) is installed on another lifting seat (4). The telescopic end of the third pneumatic cylinder (23) is located in the side groove (22) and connected to the lifting plate (10). A second slide rail is provided on the inner wall of the side groove (22), and a second guide groove adapted to the second slide rail is provided on the lifting plate (10).

7. The roller pressing real-time correction online feeding control device according to claim 6, characterized in that, The fixed cylinder (11) has an inner cavity (24) inside, and a spring (25) is installed inside the inner cavity (24). The spring (25) is connected to the movable column (12).

8. The roller pressing real-time correction online feeding control device according to claim 7, characterized in that, The grating sensor (16) includes a transmitter and a receiver, which are respectively mounted on the right-angle arms (14) of the first material changing mechanism (1) and the second material changing mechanism (2), and the transmitter and receiver are arranged opposite to each other.

9. The working method of the real-time roller correction online feeding control device according to claim 8, characterized in that, The specific operational steps of this working method are as follows: Step 1: Hoist the roll (8) with the wound material onto the U-shaped base (3). The roll (8) has polygonal shafts (9) installed at both ends. Align the polygonal shafts (9) with the polygonal grooves on the inner shaft seat (7), start the first pneumatic cylinder (19), and the first pneumatic cylinder (19) drives the first outer shaft seat (5) to move until the polygonal shafts (9) of the roll (8) are fully inserted into the inner shaft seat (7), and the end of the polygonal shafts (9) contacts the polygonal limiting plate (21) of the inner shaft seat (7). The first material changing mechanism (1) is loaded with the old roll that is running, and the second material changing mechanism (2) is loaded with the new roll to be used. The lifting seats (4) of both material changing mechanisms are in the upper limit position, so that the balls (13) are separated from the surface of the roll. Step 2: The third pneumatic cylinder (23) is activated, and its telescopic end pushes the lifting plate (10) to descend vertically along the side groove (22). The second slide rail set on the inner wall of the side groove (22) cooperates with the second guide groove on the lifting plate (10) to ensure the straightness and stability of the lifting plate (10) during the descent process. When the lifting plate (10) descends, it drives the fixed cylinder (11), the movable column (12), the ball (13) and the right-angle arm (14) to descend as a whole. When the ball (13) contacts the top side surface of the coil, the movable column (12) is subjected to a reaction force and begins to contract into the inner cavity (24) of the fixed cylinder (11). The spring (25) installed in the inner cavity (24) is compressed, generating an upward elastic reaction force. The spring force keeps the ball (13) in close contact with the surface of the coil. When the ball (13) is in stable contact, the third pneumatic cylinder (23) stops descending and maintains its current position. At this time, the movable column (12) is in a state of compression balance. While the ball (13) is in contact with the coil, the right-angle arm (14) follows the movable column (12) down to the position, so that the laser rangefinder (15) and grating sensor (16) installed on it enter the working position. The probe of the laser rangefinder (15) is facing the end of the coil. Step 3: The motor of the second material changing mechanism (2) is started, driving the synchronous wheel to rotate. The synchronous wheel transmits power to the two threaded rods (18) through the synchronous belt. The two threaded rods (18) rotate synchronously in the slide groove (17). The threaded rods (18) are threadedly connected to the lifting seat (4), driving the lifting seat (4) to rise and fall vertically along the first slide rail. During the rising and falling process, the grating sensor (16) continues to work until the transmitter and receiver of the grating sensor (16) of the first material changing mechanism (1) and the second material changing mechanism (2) are at the same horizontal height, realizing the docking of the transmitter and receiver. Step 4: The laser range sensor (15) of the first material changing mechanism (1) emits a laser beam to illuminate the outermost end face of the old roll and measures the straight distance from the end face to the sensor, which is recorded as the first distance value. The laser range sensor (15) of the second material changing mechanism (2) emits a laser beam to illuminate the outermost end face of the new roll and measures the straight distance from the end face to the sensor, which is recorded as the second distance value. When the first distance value and the second distance value are equal, the roll remains stationary. When there is a difference between the first distance value and the second distance value, the second pneumatic cylinder (20) of the second material changing mechanism (2) pushes the polygonal limit plate (21) to move, thereby realizing the lateral movement of the roll (8) until the first distance value and the second distance value are equal. At this time, the outermost end face of the new roll and the old roll are precisely aligned. Step 5: The laser rangefinder (15) of the first material changing mechanism (1) and the second material changing mechanism (2) works continuously during the unwinding process to monitor the distance from the outermost end face of the old roll to the laser rangefinder (15) in real time at a high frequency. The second pneumatic cylinder (20) is used to offset the roll (8) and adjust the first distance value to always be equal to the set distance value to ensure that the roll always runs along the correct axial position during the unwinding process and prevent deviation. While the first material changing mechanism (1) performs real-time deviation correction, the second material changing mechanism (2) When the synchronous following function is executed, the second pneumatic cylinder (20) of the second material changing mechanism (2) drives the drum (8) to move. At the same time, the lifting seat (4) of the second material changing mechanism (2) descends. The transmitter and receiver of the grating sensor (16) always maintain the opposite shooting state to ensure that the end face positions of the new and old rolls are always consistent. At the same time, the top side height of the new roll and the old roll are consistent. The tape connection device is started, and after splicing the material head of the new roll with the material tail of the old roll, the drum (8) of the old roll is released and fixed. The unwinding task is switched to the new roll, and the new roll begins to unwind normally.

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