Cold rolling mill for aluminum plate strip production line

Abstract

The cold rolling mill for the aluminum plate strip production line comprises a bottom plate, an uncoiling unit, a cold rolling unit and a coiling unit, the uncoiling unit is fixed to the left side of the top face of the bottom plate, the coiling unit is fixed to the right side of the top face of the bottom plate, and the cold rolling unit is arranged between the uncoiling unit and the coiling unit; an uncoiling frame is welded to the end, away from the cold rolling unit, of the uncoiling unit, an uncoiling motor is fixed to the uncoiling frame through bolts, and a raw material coil supporting shaft is fixedly installed at the output end of the uncoiling motor of the uncoiling frame. The device has the beneficial effects that through linkage adjustment of the cantilever type tension sensor and the PLC, the tension of the strip is stabilized, and the tensile deformation or fracture risk is reduced; due to the design of the spring pre-compression roller of the anti-wrinkling device, wrinkles are effectively smoothed, the rejection rate is reduced, the rubber roller surface prevents the strip from being scratched, the uncoiling quality is improved, and the problems of traditional uncoiling tension fluctuation and wrinkles of the aluminum plate strip are solved.

Description

Technical Field

[0001] This invention relates to the field of aluminum sheet and strip production, and more specifically, to a cold rolling mill for aluminum sheet and strip production lines. Background Technology

[0002] In the cold rolling production of aluminum sheet and strip, uncoiling, rolling, and coiling are the three core steps. Existing technologies have the following problems in these three steps: In the uncoiling stage, traditional cold rolling mills typically use a fixed-speed drive to uncoil the raw material coil support shaft. Because uneven winding tension may occur during production and storage, the tension on the aluminum strip will fluctuate significantly at a fixed speed. When the tension is too low, wrinkles easily form on the strip; when the tension is too high, the strip may be stretched and deformed, affecting subsequent processing accuracy and, in severe cases, even causing breakage, increasing the scrap rate during production.

[0003] In the rolling process, traditional cold rolling mills mostly use offline inspection methods to measure the thickness of aluminum strip. This means that after the strip is rolled by the rolls, it needs to be removed from the production line and its thickness measured using specialized inspection equipment. If a thickness deviation is found, the machine needs to be stopped to adjust the relevant parameters of the rolls. This not only interrupts the production process and reduces production efficiency, but also, due to the lag in inspection and adjustment, results in a large number of defective products in a batch of strip, increasing production costs.

[0004] The main problem in the winding process is the low edge alignment accuracy of the strip. Most existing winding mechanisms rely solely on tension to wind the strip. During winding, the strip is susceptible to various external forces during transport, easily leading to edge misalignment. When the edge misalignment exceeds a certain range (usually more than 5mm), the resulting aluminum coil will have an irregular shape, affecting not only subsequent storage and transportation but also adversely impacting the next processing step, requiring additional manual correction, increasing labor costs and production time.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0006] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a cold rolling mill for aluminum sheet and strip production lines, which has the advantages of aluminum sheet and strip tension control and wrinkle prevention, real-time thickness correction and precise centering and winding, thereby solving the problems mentioned in the background technology.

[0007] (II) Technical Solution To achieve the advantages of aluminum sheet and strip tension control and wrinkle prevention, real-time thickness correction, and precise centering and winding, the specific technical solution adopted in this invention is as follows: A cold rolling mill for aluminum sheet and strip production line includes a base plate, an uncoiling unit, a cold rolling unit, and a coiling unit. The uncoiling unit is fixed to the left side of the top surface of the base plate, and the coiling unit is fixed to the right side of the top surface of the base plate. The cold rolling unit is located between the uncoiling unit and the coiling unit. An uncoiling frame is welded to the end of the uncoiling unit furthest from the cold rolling unit, and an uncoiling motor is bolted to the uncoiling frame. A raw material coil support shaft is fixed to the output end of the uncoiling motor on the uncoiling frame. A cantilevered tension sensor is bolted to the inner wall of the uncoiling unit, and the uncoiling unit is close to the cold rolling unit. One end of the unit is fixed with an anti-wrinkle device. A lower pressure roller and an upper pressure roller are installed parallel to each other inside the anti-wrinkle device. The shaft ends of the lower pressure roller and the upper pressure roller are connected to bushings through bearings. A threaded column that is inserted and connected to the anti-wrinkle device is fixed on the surface of the bushing. A spring that abuts against the inner wall of the anti-wrinkle device is sleeved on the surface of the threaded column. A nut that abuts against the outer wall of the anti-wrinkle device is installed at the end of the threaded column. A PLC controller is installed on the outer surface of the unwinding unit. The output end of the PLC controller is electrically connected to the unwinding motor. The cantilever tension sensor is electrically connected to the PLC controller.

[0008] Furthermore, several hydraulic cylinders are equidistantly installed on the top of the cold rolling unit, and a support shell is fixed to the piston end of each hydraulic cylinder. An upper roll is rotatably installed inside the support shell via bearings, and an upper drive motor connected to the shaft end of the upper roll is provided on the end face of the support shell. A pressure sensor is fixed at the hydraulic cylinder mounting location of the support shell. A lower drive motor is fixedly installed on the lower surface of the cold rolling unit, and a lower roll is fixed to the output end of the lower drive motor via a coupling. The lower roll is located directly below the upper roll, and the lower roll and the upper roll are the same size. Laser thickness sensors are installed at the gaps between multiple sets of upper and lower rolls, and the laser thickness sensors are fixed to the inner wall surface of the cold rolling unit. An industrial controller is fixed on the outer surface of the cold rolling unit, and the output end of the industrial controller is electrically connected to the hydraulic cylinders. The laser thickness sensors and pressure sensors are both electrically connected to the industrial controller.

[0009] Furthermore, a centering device is welded to the side of the winding unit facing the cold rolling unit, and a front-end transmission housing is fixed to the bottom of the centering device. A winding frame is internally installed in the winding unit, and a winding motor is fixedly installed at one end of the winding frame. The output end of the winding motor is fixed to a winding shaft via a coupling, and a rotary encoder is installed at the end of the winding shaft. Two guide rollers are symmetrically installed inside the centering device, and the bottom of each guide roller is connected to a support seat via bearings. A photoelectric edge detection sensor is installed on the inner wall of the centering device, and a motion controller electrically connected to the photoelectric edge detection sensor is fixed to the outer surface of the centering device. The front-end transmission housing is fixed to the bottom of the centering device. A rear drive housing is welded and installed on the inner side of the base plate corresponding to the winding unit, and a first servo motor is fixed to the end face of the rear drive housing. A one-way screw is fixed to the output end of the first servo motor through a coupling, and a first threaded sleeve is installed on the surface thread of the one-way screw. The top of the first threaded sleeve is connected to the bottom of the winding frame by a screw. A second servo motor is fixed to the end face of the front drive housing, and a two-way screw is fixed to the output end of the second servo motor through a coupling. Two second threaded sleeves are installed on the surface thread of the two-way screw, and the two second threaded sleeves are respectively connected to the support seats at the lower ends of the two guide rollers. The output end of the motion controller is electrically connected to the first servo motor and the second servo motor respectively.

[0010] Furthermore, the spring has a diameter of 10mm, a free length of 50mm, and a compression of 20-30mm.

[0011] Furthermore, both the lower and upper pressure rollers are made of rubber-coated roller surfaces, and the hardness of the rubber-coated roller surfaces is 60 Shore A.

[0012] Furthermore, the left side wall of the winding unit has a rectangular opening corresponding to the winding frame, and the winding frame of the winding unit has an overall U-shaped structure.

[0013] Furthermore, the cantilever tension sensor is installed 1.5-2 meters from the outlet of the unwinding support shaft of the unwinding motor, and the center of the cantilever tension sensor is at the same height as the running plane of the aluminum strip, and the cantilever tension sensor is located 300mm in front of the inlet of the anti-wrinkle device.

[0014] Furthermore, the tail of the upper drive motor extends to the outside of the cold rolling unit, and a clearance opening is provided on the upper surface of the cold rolling unit corresponding to the upper drive motor.

[0015] Furthermore, several horizontal guide rods are welded to the side of the take-up frame away from the take-up motor, and each horizontal guide rod is interlocked with the outer shell of the take-up unit.

[0016] Furthermore, the uncoiling frame is composed of two hollow metal panels and several crossbars welded between them, and the crossbars of the uncoiling frame are located at the corners between the two hollow metal panels.

[0017] (III) Beneficial Effects Compared with the prior art, the present invention provides a cold rolling mill for aluminum sheet and strip production lines, which has the following advantages: (1) The present invention stabilizes the strip tension by linking the cantilever tension sensor with the PLC controller, reducing the risk of stretching deformation or breakage; the spring pre-tightening roller design of the anti-wrinkle device effectively smooths wrinkles, reduces scrap rate, and the rubber roller surface avoids strip scratches, improves uncoiling quality, and solves the problems of tension fluctuation and aluminum strip wrinkles in traditional uncoiling.

[0018] (2) The present invention uses a laser thickness sensor to monitor in real time and an industrial controller to link hydraulic cylinders to dynamically adjust rolling pressure, thereby achieving online thickness correction without stopping the machine for adjustment and improving production efficiency; the pressure sensor ensures accurate pressure adjustment, and multiple sets of rolls work together to improve rolling accuracy, reduce defective products, and overcome the limitations of offline thickness detection.

[0019] (3) The present invention uses photoelectric edge detection sensor and guide roller real-time correction, combined with horizontal fine adjustment of the winding shaft, to control edge misalignment within ±1mm. The wound aluminum coil is regular and neat, which is convenient for storage, transportation and subsequent processing, reduces manual correction costs, improves winding efficiency and quality, and improves the situation of edge alignment difference in traditional winding. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of a cold rolling mill for an aluminum sheet and strip production line according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a cold rolling mill for an aluminum sheet and strip production line according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a cold rolling mill for an aluminum sheet and strip production line according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a cold rolling mill for an aluminum sheet and strip production line according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a cold rolling mill for an aluminum sheet and strip production line according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a cold rolling mill for an aluminum sheet and strip production line according to an embodiment of the present invention; Figure 7 This is a circuit diagram of the aluminum sheet and strip uncoiling process; Figure 8 This is a circuit diagram of the cold rolling process for aluminum sheet and strip; Figure 9 This is a circuit diagram of the aluminum sheet and strip winding process.

[0022] In the picture: 1. Base plate; 2. Uncoiling unit; 3. Cold rolling unit; 4. Winding unit; 5. Uncoiling frame; 6. Uncoiling motor; 7. PLC controller; 8. Anti-wrinkle device; 9. Hydraulic cylinder; 10. Industrial controller; 11. Lower drive motor; 12. Upper drive motor; 13. Centering device; 14. Winding frame; 15. Winding motor; 16. Front transmission housing; 17. Motion controller; 18. Rear transmission housing; 19. Cantilever tension sensor; 20. Lower pressure roller; 21. Upper pressure roller; 22. Bushing; 23. Threaded column; 24. Spring; 25. Lower roll; 26. Upper roll; 27. Support shell; 28. Pressure sensor; 29. ​​Laser thickness sensor; 30. Take-up shaft; 31. Rotary encoder; 32. First servo motor; 33. Unidirectional screw; 34. First threaded sleeve; 35. Horizontal guide rod; 36. Guide roller; 37. Photoelectric edge detection sensor; 38. Second servo motor; 39. Second threaded sleeve; 40. Bidirectional screw; 41. Support base. Detailed Implementation

[0023] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0024] According to an embodiment of the present invention, a cold rolling mill for an aluminum sheet and strip production line is provided.

[0025] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. Please refer to them. Figure 1 , Figure 2 , Figure 3 and Figure 7According to an embodiment of the present invention, a cold rolling mill for an aluminum sheet and strip production line includes a base plate 1, an uncoiling unit 2, a cold rolling unit 3, and a coiling unit 4. The uncoiling unit 2 is fixed to the left side of the top surface of the base plate 1, and the coiling unit 4 is fixed to the right side of the top surface of the base plate 1. The cold rolling unit 3 is disposed between the uncoiling unit 2 and the coiling unit 4. An uncoiling frame 5 is welded and installed at the end of the uncoiling unit 2 away from the cold rolling unit 3, and an uncoiling motor 6 is fixed to the uncoiling frame 5 by bolts. A raw material coil support shaft is fixedly installed at the output end of the uncoiling motor 6 of the uncoiling frame 5. A cantilever tension sensor 19 is fixed to the inner wall of the uncoiling unit 2 by bolts, and an anti-wrinkle device 8 is fixed at the end of the uncoiling unit 2 near the cold rolling unit 3. A lower pressure roller 20 and an upper pressure roller 21 are installed parallel to each other inside the anti-wrinkle device 8, and the shaft ends of the lower pressure roller 20 and the upper pressure roller 21 are connected to bushings 22 by bearings. A threaded post 23, which is inserted and connected to the anti-wrinkle device 8, is fixed on the surface of the threaded post 23. A spring 24, which abuts against the inner wall of the anti-wrinkle device 8, is fitted on the surface of the threaded post 23. A nut, which abuts against the outer wall of the anti-wrinkle device 8, is installed at the end of the threaded post 23. A PLC controller 7 is installed on the outer surface of the uncoiling unit 2. The output end of the PLC controller 7 is electrically connected to the uncoiling motor 6. A cantilever tension sensor 19 is electrically connected to the PLC controller 7. Based on the above, the left side of the top surface of the base plate 1 is fixedly connected to the bottom of the uncoiling unit 2 by bolts. Anti-vibration pads are added to the connection part to reduce the impact of vibration on the overall equipment during uncoiling. The right side of the top surface of the base plate 1 is also fixed with a winding unit 4 by bolts. Space is reserved between the uncoiling unit 2 and the winding unit 4 to accommodate the installation of the cold rolling unit 3. The cold rolling unit 3 is precisely connected and fixed to the base plate 1 by the positioning pin at the bottom. An uncoiling frame 5 is welded to the end of the uncoiling unit 2 furthest from the cold rolling unit 3. This frame is made of extremely rigid steel. Two hollow metal panels reduce the overall weight while maintaining structural strength. Several crossbars at the corners between the panels further enhance the stability of the frame and effectively resist the torque generated by the uncoiling motor 6 during operation. The uncoiling motor 6 is fixed to the uncoiling frame 5 with high-strength bolts. The bolt connection facilitates the disassembly and maintenance of the motor. The uncoiling motor 6 is a servo motor with high torque output and stable speed control performance. Its output end is fixedly connected to the raw material coil support shaft via a coupling. The surface of the raw material coil support shaft is provided with a radial tensioning structure. When the aluminum coil is sleeved on the support shaft, the tensioning structure can be hydraulically driven to expand the shaft diameter, firmly fixing the aluminum coil and preventing relative slippage between the aluminum coil and the support shaft during uncoiling. A cantilever tension sensor 19 is fixed to the inner wall of the uncoiling unit 2 with bolts. The cantilever part of the sensor is made of lightweight alloy material, which ensures both detection sensitivity and the ability to withstand the tension of the aluminum strip.An anti-wrinkle device 8 is welded to one end of the uncoiling unit 2 near the cold rolling unit 3. The outer shell of the anti-wrinkle device 8 is a box-type structure, with a lower pressure roller 20 and an upper pressure roller 21 installed parallel to each other on the inner side. The axes of the two rollers are in the same vertical plane, ensuring a uniform clamping force on the aluminum strip. The shaft ends of both the lower pressure roller 20 and the upper pressure roller 21 are connected to bushings 22 by high-precision bearings. The selection of bearings ensures the flexibility of the roller rotation and reduces the friction when the strip passes through. A threaded post 23, which is inserted into the outer shell of the anti-wrinkle device 8, is welded to the surface of the bushing 22. A spring 24 is fitted on the surface of the threaded post 23. One end of the spring 24 abuts against the inner wall of the anti-wrinkle device 8, and the other end is in contact with the bushing 22. A nut is installed at the end of the threaded post 23, which abuts against the outer wall of the anti-wrinkle device 8. By rotating the nut, the compression of the spring 24 can be changed, thereby adjusting the pressure of the roller on the strip. The outer surface of the unwinding unit 2 is equipped with a PLC controller 7 mounted on a bracket. The controller housing is designed to be dustproof and waterproof, and can adapt to the harsh environment of the workshop. The output terminal of the PLC controller 7 is electrically connected to the unwinding motor 6 through a shielded cable, which can accurately control the speed of the motor. The cantilever tension sensor 19 is electrically connected to the PLC controller 7 through a signal cable, and transmits the detected tension signal to the controller in real time.

[0026] Please refer to Figure 1 , Figure 4 and Figure 8Several hydraulic cylinders 9 are equidistantly installed on the top of the cold rolling unit 3, and a support shell 27 is fixed to the piston end of each hydraulic cylinder 9. An upper roll 26 is rotatably mounted inside the support shell 27 via bearings. An upper drive motor 12 connected to the shaft end of the upper roll 26 is provided on the end face of the support shell 27. A pressure sensor 28 is fixed at the mounting location of the hydraulic cylinders 9 on the support shell 27. A lower drive motor 11 is fixedly installed on the lower surface of the cold rolling unit 3, and a lower roll 25 is fixed to the output end of the lower drive motor 11 via a coupling. The lower roll 25 is located directly below the upper roll 26, and the lower roll 25 and the upper roll 26 are of the same size. Multiple sets of upper rolls 26 and lower rolls 25... Laser thickness sensors 29 are installed at all gaps and are fixed to the inner wall of the cold rolling unit 3. An industrial controller 10 is fixed to the outer surface of the cold rolling unit 3, and the output end of the industrial controller 10 is electrically connected to the hydraulic cylinder 9. Both the laser thickness sensor 29 and the pressure sensor 28 are electrically connected to the industrial controller 10. Based on the above, several hydraulic cylinders 9 are equidistantly installed along the length of the top of the cold rolling unit 3. The cylinder body of the hydraulic cylinder 9 is fixedly connected to the top frame of the cold rolling unit 3 through a flange. The piston end of each hydraulic cylinder 9 is rigidly connected to the support shell 27 by bolts. The extension and retraction of the piston can drive the support shell 27 to move up and down. The support shell 27 is a hollow box-shaped structure. The upper roll 26 is rotatably installed inside through two high-precision bearings. Wear-resistant gaskets are added between the bearing seats and the support shell 27 to reduce wear after long-term use. An upper drive motor 12, connected to the shaft end of the upper roll 26, is fixedly mounted on the end face of the support shell 27 via a motor mount. The motor output shaft is connected to the shaft end of the upper roll 26 via a gear coupling to ensure the stability of power transmission. The upper drive motor 12 is a variable frequency motor with speed regulation function, which can adjust the speed of the upper roll 26 according to rolling requirements. A pressure sensor 28 is fixed at the connection between the support shell 27 and the hydraulic cylinder 9. The sensor's detection end contacts the force-bearing surface of the piston of the hydraulic cylinder 9, which can accurately detect the pressure applied to the upper roll 26 by the hydraulic cylinder 9. A lower drive motor 11 is fixedly mounted on the lower surface of the cold rolling unit 3 via bolts. The model of the lower drive motor 11 matches that of the upper drive motor 12. Its output end is fixed to the lower roll 25 via a flexible coupling. The flexible coupling can compensate for the installation deviation between the two shafts and reduce the impact of vibration on the transmission. The lower roll 25 is located directly below the upper roll 26. The two are exactly the same size, and their roll surfaces have undergone special quenching treatment, with a hardness of HRC55 or higher, which can improve the wear resistance and service life of the rolls. Laser thickness sensors 29 are installed at the gaps between multiple sets of upper rolls 26 and lower rolls 25. The sensors are fixed to the inner wall of the cold rolling unit 3 by brackets. The laser emitter and receiver are located on the upper and lower sides of the strip, respectively, which can detect the thickness of the rolled strip in real time. The detection data is transmitted to the industrial controller 10 through the signal line.An industrial controller 10 is installed on the outer surface of the cold rolling unit 3 through a protective box. The protective box has good heat dissipation performance, which can ensure that the controller works stably in high temperature environment. The output end of the industrial controller 10 is electrically connected to the hydraulic cylinder 9 through a hydraulic valve group, which can accurately control the extension and retraction of the hydraulic cylinder 9. The laser thickness sensor 29 and the pressure sensor 28 are both electrically connected to the industrial controller 10 through data cables to realize real-time feedback of detection data.

[0027] Please refer to Figure 1 , Figure 5 , Figure 6 and Figure 9A centering device 13 is welded to the side of the winding unit 4 facing the cold rolling unit 3, and a front drive housing 16 is fixed to the bottom of the centering device 13. A winding frame 14 is installed inside the winding unit 4, and a winding motor 15 is fixed to one end of the winding frame 14. The output end of the winding motor 15 is fixed to a winding shaft 30 through a coupling, and a rotary encoder 31 is installed on the shaft end of the winding shaft 30. Two guide rollers 36 are symmetrically installed inside the centering device 13, and the bottom of each guide roller 36 is connected to a support seat 41 through a bearing. A photoelectric edge detection sensor 37 is installed on the inner wall of the centering device 13, and a motion controller 17 electrically connected to the photoelectric edge detection sensor 37 is fixed to the outer surface of the centering device 13. A front drive housing 16 is fixed to the bottom of the centering device 13, and a rear drive housing 18 is welded to the inner side of the base plate 1 corresponding to the winding unit 4, and a first... A servo motor 32 has a unidirectional screw 33 fixed to its output end via a coupling. A first threaded sleeve 34 is threaded onto the surface of the unidirectional screw 33. The top of the first threaded sleeve 34 is connected to the bottom of the winding frame 14 via screws. A second servo motor 38 is fixed to the end face of the front transmission housing 16. A bidirectional screw 40 is fixed to the output end of the second servo motor 38 via a coupling. Two second threaded sleeves 39 are threaded onto the surface of the bidirectional screw 40, and the two second threaded sleeves 39 are respectively connected to the support seats 41 at the lower ends of the two guide rollers 36. The output end of the motion controller 17 is electrically connected to the first servo motor 32 and the second servo motor 38. Based on the above, a centering device 13 is welded to the side of the winding unit 4 facing the cold rolling unit 3. The outer shell of the centering device 13 has a frame structure, and the connection point with the winding unit 4 is fully welded to ensure connection strength. The bottom of the centering device 13 is bolted to the front transmission housing 16. The transmission housing has a sealed design, effectively preventing dust and water damage inside. Inside the take-up unit 4, a take-up frame 14 is mounted via a guide rail slider mechanism. The take-up frame 14 can slide horizontally, and a take-up motor 15 is fixedly mounted on one end via a motor mount. The take-up motor 15 is a DC motor with high torque output, and its output end is connected to the take-up shaft 30 via a reduction gearbox. The reduction gearbox converts the high speed of the motor into the low speed and high torque required by the take-up shaft 30. A rotary encoder 31 is mounted on the shaft end of the take-up shaft 30. The encoder rotates synchronously with the take-up shaft 30 via a coupling, accurately recording the number of rotations of the take-up shaft 30 (the number of rotations of the rotary encoder 31 forms a trigger command every ten rotations), providing a signal basis for the horizontal fine adjustment of the take-up shaft 30. Two guide rollers 36 are symmetrically mounted on the inner side of the centering device 13. The roller surface of the guide rollers 36 is made of rubber to avoid scratching the surface of the aluminum strip. The bottom of each guide roller 36 is connected to a support seat 41 via a bearing seat, and the support seat 41 slides in cooperation with the guide rail at the bottom of the centering device 13.A photoelectric edge detection sensor 37 is installed on the inner wall of the centering device 13. The sensor's detection lens is directly facing the edge of the aluminum strip, enabling real-time monitoring of the strip's edge offset. The detection signal is transmitted to the motion controller 17 via a cable. The motion controller 17 is fixed to the outer surface of the centering device 13 by a mounting box. The mounting box has heat dissipation holes to ensure the controller's normal operating temperature. The output of the motion controller 17 is electrically connected to the first servo motor 32 and the second servo motor 38 via servo drivers, respectively, to achieve precise control of the motors. A rear transmission housing 18 is welded and installed on the inner side of the base plate 1 at the position corresponding to the winding unit 4. The rear transmission housing 18 has the same structure as the front transmission housing 16. A first servo motor 32 is installed inside. The first servo motor 32 is fixed to the end face of the transmission housing through a motor mount. A one-way screw 33 is fixed to its output end through a coupling. A first threaded sleeve 34 is installed on the surface thread of the one-way screw 33. The top of the first threaded sleeve 34 is connected to the connecting block at the bottom of the winding frame 14 through a screw. When the first servo motor 32 rotates, the winding frame 14 can be driven to move horizontally through the screw drive. A second servo motor 38 is fixed to the end face of the front transmission housing 16. The output end of the second servo motor 38 is fixed to a bidirectional screw 40 through a coupling. The two ends of the bidirectional screw 40 have opposite threads, and two second threaded sleeves 39 are threadedly installed on their surfaces. The two second threaded sleeves 39 are respectively connected to the support seats 41 at the lower ends of the two guide rollers 36. When the second servo motor 38 rotates, the two second threaded sleeves 39 can drive the guide rollers 36 to move in opposite directions or away from each other, thereby correcting the edge offset of the aluminum strip.

[0028] Please refer to Figure 3 The spring 24 has a diameter of 10mm and a free length of 50mm. Its compression is 20-30mm. The spring 24 used in the anti-wrinkle device 8 is a cylindrical helical compression spring made of high-strength spring steel wire with a diameter of 10mm. This size ensures sufficient stiffness to provide the required preload without taking up too much space due to an excessively large diameter. The 50mm free length of the spring 24, in its installed state, allows its compression to be set within the range of 20-30mm. At a compression of 20mm, the spring 24 provides approximately 50N of preload, suitable for thinner aluminum strips; at 30mm, the preload reaches 80N, meeting the smoothing requirements of thicker aluminum strips. This adjustable compression design allows the anti-wrinkle device 8 to adapt to aluminum strips of different thicknesses, ensuring effective smoothing of strip wrinkles under various working conditions.

[0029] Please refer to Figure 3Both the lower pressure roller 20 and the upper pressure roller 21 are made of rubber-coated roller surfaces with a hardness of 60 Shore A. The rubber material used is nitrile rubber, which has high wear resistance and elasticity, and the coating thickness is 5-8 mm. The hardness of the rubber-coated roller surfaces is precisely controlled at 60 Shore A. This hardness value is crucial, ensuring sufficient pressure on the aluminum strip to smooth wrinkles, while also allowing the rubber's elastic deformation to adapt to localized protrusions on the strip surface, preventing scratches or indentations. Simultaneously, the rubber material reduces noise during strip passage, improving the working environment in the workshop.

[0030] Please refer to Figure 1 The left side wall of the winding unit 4 has a rectangular opening corresponding to the winding frame 14, and the winding frame 14 of the winding unit 4 has an overall U-shaped structure. The size of the rectangular opening is slightly larger than the cross-sectional size of the winding frame 14, providing sufficient space for the horizontal movement of the winding frame 14, and also facilitating the operator's observation of the winding of the aluminum coil on the winding shaft 30. The overall U-shaped structure of the winding frame 14 of the winding unit 4 ensures stable support at both ends of the winding shaft 30. The two side plates of the U-shaped frame are welded from thick steel plates, possessing extremely high rigidity and capable of withstanding the radial and axial forces generated during the winding process, ensuring the smooth rotation of the winding shaft 30.

[0031] Please refer to Figure 1 The cantilever tension sensor 19 is installed 1.5-2 meters from the exit of the uncoiling support shaft of the uncoiling motor 6. The center of the cantilever tension sensor 19 is at the same height as the running plane of the aluminum strip, and it is located 300mm before the inlet of the anti-wrinkle device 8. The installation position of the cantilever tension sensor 19 has been precisely calculated and is fixed 1.5-2 meters from the exit of the uncoiling support shaft of the uncoiling motor 6. This distance avoids areas with large tension fluctuations in the initial stage of raw material release, ensuring a more stable and accurate tension signal. The center of the cantilever tension sensor 19 is at the same height as the running plane of the aluminum strip, avoiding detection errors caused by the sensor and the strip running plane not being coplanar, thus ensuring the accuracy of tension detection. Simultaneously, the sensor's location 300mm before the inlet of the anti-wrinkle device 8 allows for the detection of raw tension data before the strip enters the anti-wrinkle device 8, providing a reliable basis for the PLC controller 7 to adjust the speed of the uncoiling motor 6, ensuring that the tension of the strip entering the anti-wrinkle device 8 is within a reasonable range.

[0032] Please refer to Figure 1 and Figure 6The upper drive motor 12 extends to the outside of the cold rolling unit 3. A clearance opening is provided on the upper surface of the cold rolling unit 3 corresponding to the upper drive motor 12. This installation method prevents heat generated during motor operation from accumulating inside the cold rolling unit 3, facilitating heat dissipation and extending the motor's service life. The clearance opening on the upper surface of the cold rolling unit 3, corresponding to the position of the upper drive motor 12, has a shape that matches the shape of the motor's tail, providing space for the motor's tail without affecting the overall structural strength of the cold rolling unit 3. Furthermore, the edges of the clearance opening are chamfered to prevent sharp edges from causing scratches to operators.

[0033] Please refer to Figure 5 A number of horizontal guide rods 35 are welded to the side of the take-up frame 14 away from the take-up motor 15, and each horizontal guide rod 35 is inserted and connected to the outer shell of the take-up unit 4. The guide rods 35 are uniformly welded to the side of the take-up frame 14 away from the take-up motor 15. The guide rods are made of high-precision cold-drawn round steel with a chrome-plated surface, providing good wear resistance and smoothness. Each horizontal guide rod 35 is inserted and connected to a guide sleeve on the outer shell of the take-up unit 4. A sliding bearing is installed inside the guide sleeve to reduce friction between the guide rod and the outer shell, ensuring the stability and flexibility of the take-up frame 14 during horizontal movement. The horizontal guide rods 35 effectively prevent the take-up frame 14 from tilting or wobbling during movement, ensuring the accuracy of the horizontal fine-tuning of the take-up shaft 30.

[0034] Please refer to Figure 1 The uncoiling frame 5 is composed of two perforated metal panels and several crossbars welded between them. The crossbars are positioned at the corners between the two perforated metal panels. The perforated metal panels are manufactured using laser cutting technology, which reduces the weight of the frame while ensuring structural rigidity. The crossbars are located at the corners between the two perforated metal panels, and the welding between the crossbars and the panels uses bevel welding, resulting in full and high-strength welds that firmly connect the two panels into a single unit. This frame structure design meets the installation and operational requirements of the uncoiling motor 6 and the raw material coil support shaft while minimizing material usage and reducing equipment manufacturing costs.

[0035] Working principle: First, the raw material roll is placed on the raw material roll support shaft of the uncoiling motor 6. By starting the uncoiling motor 6, the uncoiling motor 6 drives the raw material roll support shaft to rotate and release the aluminum strip. The cantilever tension sensor 19 detects the strip tension in real time and transmits the signal to the PLC controller 7. When the tension deviates from the set range, the PLC controller 7 adjusts the speed of the uncoiling motor 6 to stabilize the tension. After the strip enters the anti-wrinkle device 8, the lower pressure roller 20 and the upper pressure roller 21 are connected by a spring 24 (diameter 10mm, free length 50mm, compression amount 20-30mm) on the surface of the threaded column 23 connected by the bushing 22, which generates a preload force to form a uniform pressure on the strip. The rubber-coated roller surface (hardness 60 Shore A) adapts to the local protrusions of the strip and smooths out wrinkles. The nut can adjust the spring preload force to adapt to strips of different thicknesses. When the raw material roll is cold rolled, the industrial controller 10 receives the strip thickness signal detected by the laser thickness sensor 29, compares it with the target thickness, and controls the hydraulic cylinder 9 to operate. Hydraulic cylinder 9 drives upper roll 26 to move up and down via support shell 27. Pressure sensor 28 provides real-time pressure feedback to industrial controller 10, forming a closed-loop control to adjust rolling pressure. Upper drive motor 12 and lower drive motor 11 drive upper roll 26 and lower roll 25 to rotate, rolling the strip. Multiple sets of rolls work together to achieve continuous rolling. When coiling after cold rolling, photoelectric edge detection sensor 37 detects the edge position of the strip and transmits the signal to motion controller 17. When the strip deviates, motion controller 17 drives second servo motor 38, which drives two second threaded sleeves 39 and guide roller 36 to move via bidirectional screw 40 to correct the strip position. Coiling motor 15 drives coiling shaft 30 to coil the strip. Rotary encoder 31 records the number of coiling turns. Every 10 turns, motion controller 17 starts first servo motor 32, which finely adjusts the horizontal position of coiling frame 14 and coiling shaft 30 via unidirectional screw 33 and first threaded sleeve 34 to ensure coiling alignment. The horizontal guide rod 35 ensures that the winding frame 14 moves smoothly.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cold rolling mill for an aluminum sheet and strip production line, characterized in that, The system includes a base plate (1), an uncoiling unit (2), a cold rolling unit (3), and a winding unit (4). The uncoiling unit (2) is fixed on the left side of the top surface of the base plate (1), and the winding unit (4) is fixed on the right side of the top surface of the base plate (1). The cold rolling unit (3) is arranged between the uncoiling unit (2) and the winding unit (4). An uncoiling frame (5) is welded and installed at the end of the uncoiling unit (2) away from the cold rolling unit (3), and an uncoiling motor (6) is fixed on the uncoiling frame (5) by bolts. A raw material roll support shaft is fixedly installed at the output end of the uncoiling motor (6) of the uncoiling frame (5). A cantilever tension sensor (19) is fixed on the inner wall of the uncoiling unit (2) by bolts, and an anti-wrinkle device is fixed at the end of the uncoiling unit (2) near the cold rolling unit (3). The device (8) has a lower pressure roller (20) and an upper pressure roller (21) installed in parallel on the inner side of the anti-wrinkle device (8). The shaft ends of the lower pressure roller (20) and the upper pressure roller (21) are connected to the bushings (22) by bearings. The surface of the bushings (22) is fixed with a threaded column (23) that is inserted into the anti-wrinkle device (8). The surface of the threaded column (23) is fitted with a spring (24) that abuts against the inner wall of the anti-wrinkle device (8). The end of the threaded column (23) is fitted with a nut that abuts against the outer wall of the anti-wrinkle device (8). The outer surface of the unwinding unit (2) is fitted with a PLC controller (7). The output end of the PLC controller (7) is electrically connected to the unwinding motor (6). The cantilever tension sensor (19) is electrically connected to the PLC controller (7).

2. The cold rolling mill for an aluminum sheet and strip production line according to claim 1, characterized in that, Several hydraulic cylinders (9) are equidistantly installed on the top of the cold rolling unit (3), and a support shell (27) is fixed to the piston end of each hydraulic cylinder (9). An upper roll (26) is rotatably installed inside the support shell (27) via bearings, and an upper drive motor (12) connected to the shaft end of the upper roll (26) is provided on the end face of the support shell (27). A pressure sensor (28) is fixed at the installation location of the hydraulic cylinder (9) on the support shell (27). A lower drive motor (11) is fixedly installed on the lower surface of the cold rolling unit (3), and a lower roll (25) is fixed to the output end of the lower drive motor (11) via a coupling. The lower roll (25) is located directly below the upper roll (26), and the lower roll (25) and the upper roll (26) are the same size. Laser thickness sensors (29) are installed at the gaps between multiple sets of upper rolls (26) and lower rolls (25), and the laser thickness sensors (29) are fixed to the inner wall of the cold rolling unit (3). An industrial controller (10) is fixed to the outer surface of the cold rolling unit (3), and the output end of the industrial controller (10) is electrically connected to the hydraulic cylinder (9). The laser thickness sensor (29) and the pressure sensor (28) are both electrically connected to the industrial controller (10).

3. The cold rolling mill for an aluminum sheet and strip production line according to claim 1, characterized in that, The winding unit (4) has a centering device (13) welded to the side facing the cold rolling unit (3), and a front transmission housing (16) is fixed to the bottom of the centering device (13). The winding unit (4) has a winding frame (14) installed inside, and a winding motor (15) is fixed to one end of the winding frame (14). The output end of the winding motor (15) is fixed to a winding shaft (30) via a coupling, and a rotary encoder (31) is installed on the shaft end of the winding shaft (30). Two guide rollers (36) are symmetrically installed on the inner side of the centering device (13), and the bottom of the two guide rollers (36) is connected to a support seat (41) via a bearing. A photoelectric edge detection sensor (37) is installed on the inner wall of the centering device (13), and a motion controller (17) electrically connected to the photoelectric edge detection sensor (37) is fixed to the outer surface of the centering device (13). The front transmission housing (16) is fixed to the bottom of the centering device (13). The bottom plate (1) is welded to the winding unit (4) and a rear transmission shell (18) is installed on the inner side. The end face of the rear transmission shell (18) is fixed with a first servo motor (32). The output end of the first servo motor (32) is fixed with a one-way screw (33) through a coupling. The surface thread of the one-way screw (33) is fitted with a first threaded sleeve (34). The top of the first threaded sleeve (34) is connected to the bottom of the winding frame (14) by a screw. The end face of the front transmission shell (16) is fixed with a second servo motor (38). The output end of the second servo motor (38) is fixed with a two-way screw (40) through a coupling. The surface thread of the two-way screw (40) is fitted with two second threaded sleeves (39). The two second threaded sleeves (39) are respectively connected to the support base (41) at the lower end of the two guide rollers (36). The output end of the motion controller (17) is electrically connected to the first servo motor (32) and the second servo motor (38).

4. The cold rolling mill for an aluminum sheet and strip production line according to claim 1, characterized in that, The spring (24) has a diameter of 10 mm, a free length of 50 mm, and a compression of 20-30 mm.

5. The cold rolling mill for an aluminum sheet and strip production line according to claim 1, characterized in that, Both the lower pressure roller (20) and the upper pressure roller (21) are made of rubber-coated roller surface, and the hardness of the rubber-coated roller surface is 60 Shore A.

6. The cold rolling mill for an aluminum sheet and strip production line according to claim 3, characterized in that, The left side wall of the winding unit (4) has a rectangular opening corresponding to the winding frame (14), and the winding frame (14) of the winding unit (4) is U-shaped in general.

7. The cold rolling mill for an aluminum sheet and strip production line according to claim 1, characterized in that, The cantilever tension sensor (19) is installed 1.5-2 meters from the outlet of the unwinding support shaft of the unwinding motor (6), and the center of the cantilever tension sensor (19) is at the same height as the running plane of the aluminum strip, and the cantilever tension sensor (19) is located 300 mm in front of the inlet of the anti-wrinkle device (8).

8. The cold rolling mill for an aluminum sheet and strip production line according to claim 2, characterized in that, The tail of the upper drive motor (12) extends to the outside of the cold rolling unit (3), and the upper surface of the cold rolling unit (3) is provided with a clearance opening corresponding to the upper drive motor (12).

9. The cold rolling mill for an aluminum sheet and strip production line according to claim 3, characterized in that, The winding frame (14) has several horizontal guide rods (35) welded to the side away from the winding motor (15), and each horizontal guide rod (35) is inserted and connected to the outer shell of the winding unit (4).

10. The cold rolling mill for an aluminum sheet and strip production line according to claim 1, characterized in that, The uncoiling frame (5) is composed of two hollow metal panels and several crossbars welded between them, and the several crossbars of the uncoiling frame (5) are set at the corners between the two hollow metal panels.

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