Twenty-high rolling mill with bi-directional winding

Abstract

The application discloses a twenty-roller rolling machine for bidirectional winding, which comprises a base, a rolling machine and a limiting extrusion device arranged on the base, a transmission roller and a speed reducer motor arranged in the rolling machine, winding assemblies arranged on both sides of the rolling machine, a shell, a first motor, a rotating roller, a driving cylinder and an arc plate of the winding assembly, a detection device arranged between the shell and the rotating roller, a travel switch and a contact block of the detection device, the contact block moving along the radial direction of the rotating roller when the rotating roller rotates, the speed reducer motor reversely rotating when the contact block contacts with the travel switch, a supporting assembly arranged below the winding assembly, and a pressing assembly arranged on the side surface of the winding assembly. The application realizes material discharging and winding through the winding assembly, detects the winding thickness of the steel belt through the detection device arranged on the side surface of the winding assembly, controls the rotating direction of the speed reducer motor, and repeatedly rolls the steel belt in the rolling machine, so that the rolling efficiency is high and reliable.

Description

Technical Field

[0001] This invention belongs to the technical field of 20-roll rolling mills, specifically relating to a bidirectional winding 20-roll rolling mill. Background Technology

[0002] Steel strip is typically stored in coils for easy transport and transfer. When rolling is required, the coil is first placed onto the unloading device using a forklift, then pulled out and placed into the rolling mill for processing. Simultaneously, the strip extends from the other side of the mill and is coiled up by the rewinding device. Since existing rolling mills are often unidirectional, the strip rolling process is typically slow. Sometimes, the processed strip thickness does not meet requirements, necessitating the removal of the coil from the rewinding device and its repositioning onto the unloading device for the next processing cycle. Because the rewinding tray on existing rewinding devices is difficult to separate from the coil, removing the coil from the rewinding device takes considerable time, resulting in low overall strip processing efficiency and inconvenient coil transfer. Therefore, a bidirectional rewinding 20-roll mill is needed to overcome these difficulties. Summary of the Invention

[0003] This invention addresses the problems existing in the prior art by designing a bidirectional winding 20-roll rolling mill. The invention sets up winding assemblies on both sides of the rolling mill. Each winding assembly can both wind up and unwind the material, and the loading and unloading are convenient. The winding assembly is equipped with a detection device on its side to detect the thickness of the steel strip winding, thereby controlling the direction of the reduction motor, so that the steel strip is repeatedly rolled in the rolling mill, resulting in high rolling efficiency and reliability.

[0004] The objective of this invention is achieved through the following technical solution: a bidirectional winding twenty-roll rolling mill, comprising a base, a rolling mill mounted on the base, a limiting extrusion device on the side of the rolling mill, a drive roller inside the rolling mill, and a reduction motor for driving the drive roller to rotate at the rear of the rolling mill; winding assemblies for winding steel strip are provided on the left and right sides of the rolling mill, each winding assembly comprising a housing, a first motor, a rotating roller, a drive cylinder, and several arc-shaped plates disposed on the outer layer of the rotating roller; when the first motor operates, it drives the rotating roller to rotate relative to the housing, and when the drive cylinder operates, it controls the arc-shaped plates to move closer to or away from the rotating roller; a detection device for detecting the overall winding thickness of the steel strip is provided between the housing and the rotating roller, the detection device comprising a limit switch and a contact block; when the rotating roller rotates, the contact block moves radially along the rotating roller, and when the contact block contacts the limit switch, the reduction motor rotates in the opposite direction; a support assembly for supporting the steel coil is provided directly below the winding assembly, and a clamping assembly for extruding the steel coil is provided on the side of the winding assembly.

[0005] Preferably, the winding assembly further includes a bushing, a second motor, a lead screw, and a rotating component; the base is provided with a baffle and a limiting plate, and a mounting plate is installed between the baffle and the limiting plate, the mounting plate being hinged to the baffle; the housing is provided with a guide channel for installing the bushing, the first motor is disposed inside the bushing and connected to a rotating roller; the bushing is provided with a lead screw, both ends of the lead screw are mounted inside the housing via bearings, the end of the lead screw away from the rotating roller is connected to the second motor, and the bushing moves along the guide channel when the second motor is working; the rotating roller is disposed between the bushing and the mounting plate, one end of the rotating roller is mounted inside the bushing via a bearing, the other end is connected to the rotating component and rotates synchronously with the rotating component, and the end of the rotating component is mounted on the mounting plate via a bearing.

[0006] The steel coil is first placed onto the support assembly by a forklift. The support assembly then controls the steel coil and the rotating roller to be coaxially aligned. Next, a second motor drives a lead screw to rotate. As the lead screw rotates, the bushing moves along the guide channel, causing the bushing to pull the rotating roller out of the housing and into the steel coil. Before the rotating roller exits the housing, the mounting plate is rotated to align with the limiting plate, ensuring the rotating component and the rotating roller are coaxially aligned. This allows the rotating roller to connect with the rotating component when it extends out of the housing. Then, the first motor drives the rotating roller to rotate.

[0007] Preferably, the bushing has a pair of limiting protrusions, and the guide channel has a limiting groove for installing the limiting protrusions. The outer contour of the limiting protrusion matches the outer contour of the limiting groove. The limiting protrusion above the bushing has a threaded hole, and the lead screw is installed in the threaded hole. The limiting protrusion below the bushing has a guide hole, and the housing has a guide rod for installing the bushing, which is installed in the guide hole. The guide rod has a pair of supporting parts on its left and right sides, which are located between the guide channel and the inner wall of the housing. The end of the second motor has a first gear that rotates synchronously with it, and the end of the lead screw has a second gear that rotates synchronously with it. The first gear and the second gear mesh with each other.

[0008] The limiting protrusion is engaged within the limiting groove, and the lead screw is positioned within the threaded hole. This allows the bushing to move along the direction of the limiting groove when the lead screw rotates, preventing the bushing from rotating relative to the guide channel. Simultaneously, the bushing remains stable when the rotating roller rotates. A guide rod inside the housing is inserted into a guide hole, further enhancing the stability of the bushing during movement. A support portion is provided at the bottom of the guide channel, improving its overall support and ensuring more stable and reliable movement of the bushing and rotating roller within the guide channel. When the second motor operates, it drives the first gear to rotate, which in turn drives the second gear to rotate synchronously with the lead screw.

[0009] Preferably, the rotating roller is provided with a plurality of evenly distributed placement grooves, and a driving cylinder is provided in the placement groove. The piston shaft of the driving cylinder is provided with an arc-shaped plate, and the arc-shaped plate is evenly distributed on the surface of the rotating roller.

[0010] When the drive cylinder operates, it causes the arc-shaped plates to move radially along the rotating roller. When placing the steel coil, the drive cylinder first controls the arc-shaped plates to approach the surface of the rotating roller, so that all the arc-shaped plates will tighten and the rotating roller can smoothly enter the inner circle of the steel coil. When the rotating roller is fully inserted into the steel coil and connected to the rotating component, the drive cylinder controls the arc-shaped plates to move away from the surface of the rotating roller, so that the arc-shaped plates will open up and all the arc-shaped plates will abut against the surface of the inner circle of the steel coil. Then the steel coil will not have axial displacement relative to the rotating roller, and the rotating roller can drive the steel coil to rotate when it rotates.

[0011] Preferably, the end face of the mounting plate opposite to the rotating roller is provided with a pair of mounting holes, and a locking bolt for fixing the mounting plate is provided in the mounting hole. The locking bolt is threaded to the mounting hole and extends into the base. A first electromagnet is provided on the end face of the mounting plate opposite to the mounting hole, and a first armature is provided on the limiting plate. When the first electromagnet is energized, it attracts the first armature.

[0012] The mounting plate can rotate relative to the baffle. When the rotating roller is working normally, the mounting plate and the limiting plate are in contact with each other; at the same time, the first electromagnet is energized and attracts the first armature, so the mounting plate cannot rotate. The mounting plate is fixed by the locking nut, so that the mounting plate remains fixed when the rotating roller rotates.

[0013] Preferably, the detection devices are arranged in pairs on both sides of the rolling mill. The detection devices also include a correction plate, a lifting roller, and a guide roller. The side of the housing is provided with uniformly distributed first guide posts. The correction plate is sleeved on the first guide posts and located between the housing and the side wall of the rotating roller. The end of the first guide post is provided with a blocking plate. A spring is sleeved on the first guide post. One end of the spring abuts against the housing, and the other end abuts against the correction plate. The correction plate is provided with a plurality of guide rollers pivotally connected to it. The axial direction of the guide rollers is perpendicular to the base. The middle of the correction plate is provided with a mounting rod. The contact block is sleeved on the mounting rod. The end of the contact block facing the rotating roller is provided with a lifting roller pivotally connected to it. The lifting roller is in contact with the surface of the steel strip. The end of the correction plate facing away from the lifting roller is provided with a limit switch fixedly connected to it. The limit switch is located near the bottom of the mounting rod. The side of the housing is provided with a second electromagnet. The end face of the correction plate facing the housing is provided with a second armature. When the second electromagnet is energized, it attracts the second armature.

[0014] Before the steel coil is placed on the rotating roller, the second electromagnet is energized, attracting the second armature, and the spring is compressed, causing the alignment plate to move away from the side wall of the rotating roller. When the steel coil is placed on the rotating roller, the second electromagnet is de-energized, causing the alignment plate to press against the side of the steel coil, thus aligning the coil. At this time, the spring is still compressed. The alignment plate is equipped with guide rollers for better alignment of the steel coil. The contact block is mounted on the mounting rod, and the lifting roller on the contact block is in contact with the outermost surface of the steel coil. During the winding process, the overall thickness of the steel coil changes, and the lifting roller moves up and down synchronously. As the steel strip on the coil is continuously fed to the rolling mill, the number of turns of the coil decreases, and the overall thickness of the coil becomes thinner. This causes the contact block to descend along the mounting rod. When only one turn of the coil remains on the rotating roller, the contact block contacts the limit switch. At this point, the control circuit sends a command to the geared motor, causing the geared motor to rotate in the opposite direction. The winding assembly, which was originally used for unwinding, is now used for winding, and the steel strip can be repeatedly rolled on the rolling mill.

[0015] Preferably, the support components are arranged in pairs on both sides of the rolling mill. Each support component includes a support platform, a lifting platform, support rollers, and lifting cylinders. The support platform is fixedly installed in the groove of the base and directly below the rotating roller. The upper surface of the support platform is provided with a pair of lifting cylinders, and the piston shaft of each lifting cylinder is provided with a lifting platform fixedly connected to it. Several evenly distributed second guide posts are provided on the corners of the support platform, and the lifting platform is sleeved on the second guide posts. The lifting platform is provided with a pair of support rollers, and each support roller is pivotally connected to the lifting platform.

[0016] When placing the steel coil, a forklift first places it onto the support roller. Then, a lifting cylinder controls the lifting platform to move upwards, aligning the steel coil with the rotating roller. The forklift then moves away, closing the mounting plate to align the rotating component with the rotating roller. Next, a second motor drives a lead screw to rotate, which in turn moves a bushing. This bushing movement causes the rotating roller to extend into the steel coil and connect with the rotating component. A drive cylinder then controls the arc-shaped plate to open, and the lifting cylinder lowers the lifting platform, allowing the first motor to rotate the steel coil. When removing the steel coil, the lifting cylinder moves the lifting platform upwards, supporting the steel coil with the support roller. A drive cylinder then controls the arc-shaped plate to tighten, creating a gap between the rotating roller and the inner wall of the steel coil. The bushing then moves, causing the rotating roller to retract into the housing. The mounting plate is then rotated to allow the forklift space, finally enabling the forklift to reach into the inner coil and transfer it.

[0017] Preferably, the clamping assemblies are arranged in pairs on both sides of the rolling mill. Each clamping assembly includes a rotating shaft, a placement plate, a first pressure roller, and a first cylinder. The housing is provided with a mounting channel for mounting the rotating shaft, and the rotating shaft is mounted in the mounting channel via bearings. The placement plate is fixedly connected to the rotating shaft, and the placement plate is provided with a first pressure roller pivotally connected to it. The end of the rotating shaft away from the first pressure roller is provided with a connecting part, and the housing is provided with a mounting base. The piston shaft of the first cylinder is hinged to the connecting part, and the bottom of the first cylinder is hinged to the mounting base.

[0018] When the support assembly holds the steel coil, the clamping assembly presses down on the outer steel strip to prevent it from unraveling. When the first cylinder operates, the rotating shaft rotates, causing the placement plate to rotate. This rotation of the placement plate increases the distance between the first pressure roller and the rotating roller surface, bringing the first pressure roller against the steel coil surface for easier clamping. When the outer layer of steel strip wound on the rotating roller is thin, the first cylinder controls the first pressure roller to move closer to the steel strip surface to prevent unraveling. Here, the first cylinder can adjust the vertical distance between the first pressure roller and the rotating roller surface in real time.

[0019] Preferably, the rolling mill includes a lower base and an upper base that can move up and down. The lower base contains a pair of drive rollers, and the upper base also has a pair of drive rollers. Each drive roller rotates synchronously when the geared motor is operating. A mounting bracket is located at the rear of the rolling mill. Several evenly distributed drive shafts are mounted on the mounting bracket via bearings. A universal joint assembly connects the drive shafts and the drive rollers. A third gear, rotating synchronously with the drive rollers, is located at the end of each drive shaft opposite to the drive rollers. A drive gear is positioned between each third gear, and the drive bearings are mounted on the mounting bracket via pins. A geared motor that drives the third gears is also located on the mounting bracket. A fourth gear is mounted on the motor shaft of the geared motor, and the fourth gear meshes with the third gear. A limiting extrusion device is located on the side of the rolling mill.

[0020] The rolling mill here is a commonly used 20-roll mill. A 20-roll mill includes drive rolls and work rolls. The work rolls are positioned on the upper and lower ends of the steel strip. When the drive rolls rotate, they drive the work rolls to rotate. Simultaneously, the upper base can move up and down relative to the lower base, allowing the work rolls to press against the surface of the steel strip, thus rolling it. When the reduction motor operates, it drives the fourth gear to rotate. The fourth gear then drives the third gear to rotate. A transmission gear is located between the third gears, which in turn drives the drive shaft to rotate. The drive shaft then drives the universal joint assembly, which in turn drives the drive rolls to rotate. Because the drive rolls are connected by gears, all four drive rolls rotate simultaneously in the same direction. By changing the direction of the reduction motor, the direction of the drive rolls can be easily controlled, allowing the rolling mill to achieve bidirectional rolling and bidirectional winding via the winding assembly.

[0021] Preferably, the limiting extrusion device includes a driven roller, an extrusion roller, a lifting frame, and a second cylinder; the base is provided with a pair of baffles, and the driven roller is mounted on the baffles via bearings; the second cylinder is located on the side of the upper base, and the piston shaft of the second cylinder is connected to the lifting frame, and the lifting frame is provided with an extrusion roller pivotally connected to it, and the extrusion roller is located directly above the driven roller.

[0022] The second cylinder controls the movement of the lifting frame, which in turn moves the extrusion rollers, thus facilitating control of the distance between the extrusion rollers and the driven rollers. Before the steel strip enters the rolling mill, it is first positioned and flattened by the extrusion device, allowing the steel strip to enter the rolling mill horizontally, resulting in better rolling performance.

[0023] Compared with existing technologies, this invention has the following advantages: The invention provides winding components with feeding and unloading functions on both sides of the rolling mill. When one winding component is unloading, the other is winding, and the feeding and unloading functions can be switched freely. The rolling mill contains a drive roller; a reduction motor drives the drive roller to rotate. By controlling the direction of the reduction motor, the direction of the drive roller can be controlled, allowing the steel strip to be repeatedly rolled within the rolling mill. The steel strip is wound while being rolled, facilitating unloading after rolling. A detection device is installed between the rotating roller and the housing. The contact block on the detection device detects the winding thickness of the steel strip in real time. When only one turn of the steel strip remains, the contact block contacts a limit switch, which sends a command to the control circuit. The control circuit then reverses the rotation of the reduction motor, causing the steel strip to be rolled in the opposite direction. Repeating these steps allows the steel strip to be repeatedly rolled within the rolling mill. A support component is located directly below the winding component to support the steel strip and facilitate the detachment of the coil from the rotating roller. Meanwhile, a clamping assembly is provided on the side of the rotating roller to hold the steel strip in place and prevent it from unraveling. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present invention;

[0025] Figure 2 This is a perspective view of the invention from another angle;

[0026] Figure 3 This is an exploded view of the present invention;

[0027] Figure 4 A 3D view of the winding assembly;

[0028] Figure 5 An exploded view of the winding assembly;

[0029] Figure 6 This is a diagram showing the internal structure of the winding assembly;

[0030] Figure 7 This is a three-dimensional view of the shell;

[0031] Figure 8 This is a 3D view of the rolling mill.

[0032] The diagram shows the following markings: 1. Base; 2. Rolling mill; 21. Drive roller; 22. Gear motor; 23. Lower base; 24. Upper base; 25. Drive shaft; 26. Universal joint assembly; 27. Third gear; 28. Drive gear; 29. ​​Fourth gear; 3. Limiting extrusion device; 31. Driven roller; 32. Extrusion roller; 33. Lifting frame; 34. Second cylinder; 4. Winding assembly; 41. Housing; 401. First guide post; 402. Barrier plate; 403. Mounting channel; 42. First motor; 43. Rotating roller; 44. Drive cylinder; 45. Arc plate; 46. Bushing; 47. Second motor; 48. Lead screw; 49. Rotating component; 410. Guide channel; 411. Limiting protrusion; 412. Limiting groove; 413. Threaded hole; 414. Guide hole; 415. 416. Guide rod; 417. Support part; 418. Placement groove; 5. Detection device; 51. Limit switch; 52. Contact block; 53. Correction plate; 54. Lifting roller; 55. Guide roller; 56. Spring; 57. Mounting rod; 6. Support assembly; 61. Support platform; 62. Lifting platform; 63. Support roller; 64. Lifting cylinder; 65. Second guide column; 7. Pressing assembly; 71. Rotating shaft; 72. Placement plate; 73. First pressure roller; 74. First cylinder; 75. Connecting part; 76. Mounting base; 8. Baffle; 9. Limiting plate; 10. Mounting plate; 101. Mounting hole; 11. First gear; 12. Second gear; 13. Locking bolt; 14. First electromagnet; 15. First armature; 16. Second electromagnet; 17. Second armature; 18. Mounting bracket. Detailed Implementation

[0033] The present invention will be further described below with reference to the embodiments illustrated in the accompanying drawings:

[0034] like Figures 1 to 8 As shown, this embodiment discloses a bidirectional winding twenty-roll rolling mill, including a base 1, a rolling mill 2 mounted on the base 1, a limiting extrusion device 3 on the side of the rolling mill 2, a drive roller 21 inside the rolling mill 2, and a reduction motor 22 for driving the drive roller 21 to rotate at the rear of the rolling mill 2; winding assemblies 4 for winding steel strip are provided on the left and right sides of the rolling mill 2, the winding assembly 4 including a housing 41, a first motor 42, a rotating roller 43, a drive cylinder 44, and several arc-shaped plates 45 disposed on the outer layer of the rotating roller 43; when the first motor 42 is working, it drives the rotating roller 43 relative to the... When the housing 41 rotates, the driving cylinder 44 controls the arc plate 45 to move closer to or further away from the rotating roller 43. A detection device 5 for detecting the overall winding thickness of the steel strip is provided between the housing 41 and the rotating roller 43. The detection device 5 includes a limit switch 51 and a contact block 52. When the rotating roller 43 rotates, the contact block 52 moves radially along the rotating roller 43. When the contact block 52 contacts the limit switch 51, the reduction motor 22 rotates in the opposite direction. A support assembly 6 for supporting the steel coil is provided directly below the winding assembly 4. A pressing assembly 7 for squeezing the steel coil is provided on the side of the winding assembly 4.

[0035] The winding assembly 4 further includes a bushing 46, a second motor 47, a lead screw 48, and a rotating component 49; the base 1 is provided with a baffle 8 and a limiting plate 9, and a mounting plate 10 is installed between the baffle 8 and the limiting plate 9, and the mounting plate 10 is hinged to the baffle 8; the housing 41 is provided with a guide channel 410 for installing the bushing 46, the first motor 42 is disposed in the bushing 46 and connected to the rotating roller 43; the bushing 46 is provided with a lead screw 48, both ends of the lead screw 48 are mounted in the housing 41 through bearings, the end of the lead screw 48 away from the rotating roller 43 is connected to the second motor 47, and the bushing 46 moves along the guide channel 410 when the second motor 47 is working; the rotating roller 43 is disposed between the bushing 46 and the mounting plate 10, one end of the rotating roller 43 is mounted in the bushing 46 through a bearing, the other end is connected to the rotating component 49 and rotates synchronously with the rotating component 49, and the end of the rotating component 49 is mounted on the mounting plate 10 through a bearing. The bushing 46 is provided with a pair of limiting protrusions 411, and the guide channel 410 is provided with a limiting groove 412 for installing the limiting protrusions 411. The outer contour of the limiting protrusions 411 matches the outer contour of the limiting groove 412. The limiting protrusions 411 above the bushing 46 are provided with threaded holes 413, and the lead screw 48 is provided in the threaded holes 413. The limiting protrusions 411 below the bushing 46 are provided with guide holes 414. The housing 41 is provided with guide rods 415 for installing the bushing 46, and the guide rods 415 are provided in the guide holes 414. The left and right sides of the guide rods 415 are provided with a pair of supporting parts 416, and the supporting parts 416 are provided between the guide channel 410 and the inner wall of the housing 41. The end of the second motor 47 is provided with a first gear 11 that rotates synchronously with it, and the end of the lead screw 48 is provided with a second gear 12 that rotates synchronously with it. The first gear 11 and the second gear 12 mesh with each other. The rotating roller 43 is provided with several evenly distributed placement grooves 417. A drive cylinder 44 is provided in each placement groove 417. An arc-shaped plate 45 is provided on the piston shaft of the drive cylinder 44. The arc-shaped plate 45 is evenly distributed on the surface of the rotating roller 43. The end face of the mounting plate 10 opposite to the rotating roller 43 is provided with a pair of mounting holes 101. A locking bolt 13 for fixing the mounting plate 10 is provided in each mounting hole 101. The locking bolt 13 is threadedly connected to the mounting hole 101 and extends into the base 1. A first electromagnet 14 is provided on the end face of the mounting plate 10 opposite to the mounting hole 101. A first armature 15 is provided on the limiting plate 9. When the first electromagnet 14 is energized, it attracts the first armature 15.

[0036] The detection devices 5 are arranged in pairs on both sides of the rolling mill 2. Each detection device 5 also includes a correction plate 53, a lifting roller 54, and a guide roller 55. The side of the housing 41 is provided with evenly distributed first guide posts 401. The correction plate 53 is sleeved on the first guide posts 401 and located between the housing 41 and the side wall of the rotating roller 43. A blocking disc 402 is provided at the end of each first guide post 401. A spring 56 is sleeved on the first guide post 401, with one end abutting against the housing 41 and the other end abutting against the correction plate 53. The correction plate 53 is provided with several guide rollers 55 pivotally connected to it. The axis of 55 is perpendicular to the base 1; the middle of the correction plate 53 is provided with a mounting rod 57, the contact block 52 is sleeved on the mounting rod 57, the end of the contact block 52 facing the rotating roller 43 is provided with a lifting roller 54 pivotally connected to it, the lifting roller 54 is in contact with the surface of the steel strip; the end of the correction plate 53 facing away from the lifting roller 54 is provided with a limit switch 51 fixedly connected to it, the limit switch 51 is located near the bottom of the mounting rod 57; the side of the housing 41 is provided with a second electromagnet 16, the end face of the correction plate 53 facing the housing 41 is provided with a second armature 17, the second electromagnet 16 attracts the second armature 17 when energized.

[0037] The support components 6 are arranged in pairs on both sides of the rolling mill 2. Each support component 6 includes a support platform 61, a lifting platform 62, support rollers 63, and lifting cylinders 64. The support platform 61 is fixedly installed in the groove of the base 1 and is located directly below the rotating roller 43. The upper end face of the support platform 61 is provided with a pair of lifting cylinders 64, and the piston shaft of the lifting cylinder 64 is provided with a lifting platform 62 fixedly connected to it. Several evenly distributed second guide posts 65 are provided on the corners of the support platform 61, and the lifting platform 62 is sleeved on the second guide posts 65. The lifting platform 62 is provided with a pair of support rollers 63, and each support roller 63 is pivotally connected to the lifting platform 62. The clamping assemblies 7 are arranged in pairs on both sides of the rolling mill 2. Each clamping assembly 7 includes a rotating shaft 71, a placement plate 72, a first pressure roller 73, and a first cylinder 74. The housing 41 is provided with a mounting channel 403 for mounting the rotating shaft 71, and the rotating shaft 71 is mounted in the mounting channel 403 by bearings. The placement plate 72 is fixedly connected to the rotating shaft 71, and the placement plate 72 is provided with a first pressure roller 73 pivotally connected to it. The end of the rotating shaft 71 away from the first pressure roller 73 is provided with a connecting part 75, and the housing 41 is provided with a mounting base 76. The piston shaft of the first cylinder 74 is hinged to the connecting part 75, and the bottom of the first cylinder 74 is hinged to the mounting base 76.

[0038] The rolling mill 2 includes a lower base 23 and an upper base 24 that can move up and down. The lower base 23 has a pair of drive rollers 21 arranged inside it, and the upper base 24 has a pair of drive rollers 21 arranged on it. When the reduction motor 22 is working, each drive roller 21 rotates synchronously. A mounting bracket 18 is located at the rear of the rolling mill 2. The mounting bracket 18 has several evenly distributed drive shafts 25, which are mounted on the mounting bracket 18 via bearings. A connection is provided between the drive shafts 25 and the drive rollers 21. The universal joint assembly 26 of both; the end of the drive shaft 25 opposite to the drive roller 21 is provided with a third gear 27 that rotates synchronously with it, and a drive gear 28 is provided between each of the third gears 27. The drive shaft 25 is mounted on the mounting bracket 18 by a pin; the mounting bracket 18 is also provided with a reduction motor 22 that drives the third gear 27 to rotate. The motor shaft of the reduction motor 22 is provided with a fourth gear 29, and the fourth gear 29 meshes with the third gear 27; the side of the rolling mill 2 is provided with a limiting extrusion device 3. The limiting extrusion device 3 includes a driven roller 31, an extrusion roller 32, a lifting frame 33 and a second cylinder 34; the base 1 is provided with a pair of baffles 8, and the driven roller 31 is mounted on the baffles 8 by bearings; the second cylinder 34 is located on the side of the upper base 24, and the piston shaft of the second cylinder 34 is connected to the lifting frame 33. The lifting frame 33 is provided with an extrusion roller 32 pivotally connected to it, and the extrusion roller 32 is located directly above the driven roller 31.

[0039] The specific operation process of this embodiment is as follows: When it is necessary to place the steel coil, the steel coil is first placed on the support roller 63 by a forklift. Then, the lifting cylinder 64 controls the lifting platform 62 to move upward, so that the steel coil and the rotating roller 43 are coaxially set. Then, the forklift leaves and the mounting plate 10 is closed, so that the rotating part 49 and the rotating roller 43 are coaxially set. Next, the second motor 47 drives the lead screw 48 to rotate. The rotation of the lead screw 48 controls the movement of the bushing 46. The movement of the bushing 46 drives the rotating roller 43 to extend into the steel coil and connect with the rotating part 49. Then, the drive cylinder 44 controls the arc plate 45 to open. Then, the lifting cylinder 64 controls the lifting platform 62 to descend. So, when the first motor 42 is working, it can drive the steel coil to rotate. When the steel coil needs to be removed, the lifting cylinder 64 controls the lifting platform 62 to move upward, so that the support roller 63 supports the steel coil; then the drive cylinder 44 controls the arc plate 45 to tighten, so that there will be a gap between the rotating roller 43 and the inner wall of the steel coil; then the second motor 47 drives the lead screw 48 to rotate, and the bushing 46 drives the rotating roller 43 to retract into the housing 41. Then the mounting plate 10 is rotated to make way for the forklift, and finally the forklift can reach into the inner circle of the steel coil and transfer the steel coil.

[0040] When the first motor 42 operates, it drives the rotating roller 43 to rotate, which in turn drives the steel coil to rotate. The detection device 5 starts operating when the steel coil rotates. Before the steel coil is placed on the rotating roller 43, the second electromagnet 16 is energized, attracting the second armature 17, and the spring 56 is compressed. This causes the alignment plate 53 to move away from the side wall of the rotating roller 43. When the steel coil is placed on the rotating roller, the second electromagnet 16 is de-energized, causing the alignment plate 53 to press against the side of the steel coil, thus aligning it. At this time, the spring 56 is still compressed. The alignment plate 53 is equipped with a guide roller 55 for better alignment of the steel coil. The contact block 52 is mounted on the mounting rod 57, and the lifting roller 54 on the contact block 52 is in contact with the outermost surface of the steel coil. During the winding process, the overall thickness of the steel coil changes, and the lifting roller 54 moves up and down synchronously. As the steel strip on the coil continues to be fed to the rolling mill, the number of turns of the coil decreases, and the overall thickness of the coil becomes thinner. As a result, the contact block 52 descends along the mounting rod. When only one turn of the coil remains on the rotating roller, the contact block 52 contacts the limit switch 51. At this time, the control circuit sends a command to the geared motor 22, and the geared motor 22 rotates in the reverse direction. Then, the winding assembly 4, which was originally used for unwinding, is now used for winding, and the winding assembly 4, which was originally used for winding, is now used for unwinding. By repeating the above steps, the steel strip can be repeatedly rolled on the rolling mill 2.

[0041] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A bidirectional winding twenty-roll rolling mill, comprising a base (1), a rolling mill (2) mounted on the base (1), and a limiting extrusion device (3) provided on the side of the rolling mill (2), characterized in that, The rolling mill (2) is equipped with a transmission roller (21), and a reduction motor (22) for driving the transmission roller (21) to rotate is provided at the rear of the rolling mill (2); the left and right sides of the rolling mill (2) are provided with a winding assembly (4) for winding the steel strip, and the winding assembly (4) includes a housing (41), a first motor (42), a rotating roller (43), a drive cylinder (44) and several arc plates (45) arranged on the outer layer of the rotating roller (43); when the first motor (42) is working, it drives the rotating roller (43) to rotate relative to the housing (41), and when the drive cylinder (44) is working, it controls the arc plates (45) to move closer to or away from the rotating roller (43); between the housing (41) and the rotating roller (43) is a device for detecting the integrity of the steel strip. A device (5) for detecting the thickness of the coil winding is provided. The device (5) includes a limit switch (51) and a contact block (52). When the rotating roller (43) rotates, the contact block (52) moves radially along the rotating roller (43). When the contact block (52) contacts the limit switch (51), the geared motor (22) rotates in the opposite direction. A support assembly (6) for supporting the steel coil is provided directly below the winding assembly (4). A pressing assembly (7) for squeezing the steel coil is provided on the side of the winding assembly (4). The winding assembly (4) also includes a bushing (46), a second motor (47), a lead screw (48), and a rotating component (49). A baffle (8) and a limiting plate (9) are provided on the base (1). (8) A mounting plate (10) is installed between the limiting plate (9) and the baffle (8); the housing (41) is provided with a guide channel (410) for installing the bushing (46); the first motor (42) is installed in the bushing (46) and connected to the rotating roller (43); the bushing (46) is provided with a lead screw (48); the two ends of the lead screw (48) are installed in the housing (41) through bearings; the end of the lead screw (48) away from the rotating roller (43) is connected to the second motor (47); when the second motor (47) is working, the bushing (46) moves along the guide channel (410); the rotating roller (43) is located between the bushing (46) and the mounting plate (10). One end of the rotating roller (43) is mounted in the bushing (46) through a bearing, and the other end is connected to the rotating component (49) and rotates synchronously with the rotating component (49). The end of the rotating component (49) is mounted on the mounting plate (10) through a bearing. The detection devices (5) are arranged in pairs on both sides of the rolling mill (2). The detection devices (5) also include a correction plate (53), a lifting roller (54), and a guide roller (55). The side of the housing (41) is provided with uniformly distributed first guide posts (401). The correction plate (53) is sleeved on the first guide posts (401) and located between the housing (41) and the side wall of the rotating roller (43). The end of the first guide post (401) is provided with a blocking plate (402).A spring (56) is fitted onto the first guide post (401). One end of the spring (56) abuts against the housing (41), and the other end abuts against the correction plate (53). The correction plate (53) is provided with several guide rollers (55) pivotally connected to it. The axial direction of the guide rollers (55) is perpendicular to the base (1). A mounting rod (57) is provided in the middle of the correction plate (53). A contact block (52) is fitted onto the mounting rod (57). The contact block (52) faces the rotating roller (43). The end of the guide plate (53) is provided with a lifting roller (54) pivotally connected to it, and the lifting roller (54) is in contact with the surface of the steel strip; the end of the guide plate (53) facing away from the lifting roller (54) is provided with a limit switch (51) fixedly connected to it, and the limit switch (51) is located near the bottom of the mounting rod (57); the side of the housing (41) is provided with a second electromagnet (16), and the end face of the guide plate (53) facing the housing (41) is provided with a second armature (17). When the second electromagnet (16) is energized, it attracts the second armature (17).

2. The bidirectional winding twenty-roll mill according to claim 1, characterized in that, The bushing (46) is provided with a pair of limiting protrusions (411), and the guide channel (410) is provided with a limiting groove (412) for installing the limiting protrusions (411). The outer contour of the limiting protrusions (411) matches the outer contour of the limiting groove (412). The limiting protrusions (411) above the bushing (46) are provided with threaded holes (413), and the lead screw (48) is provided in the threaded holes (413). The limiting protrusions (411) below the bushing (46) are provided with guide holes (414), and the housing (41) is provided with guide holes (414). A guide rod (415) for installing a bushing (46) is provided, and the guide rod (415) is disposed in a guide hole (414); a pair of support parts (416) are provided on the left and right sides of the guide rod (415), and the support parts (416) are disposed between the guide channel (410) and the inner wall of the housing (41); the end of the second motor (47) is provided with a first gear (11) that rotates synchronously with it, and the end of the lead screw (48) is provided with a second gear (12) that rotates synchronously with it, and the first gear (11) and the second gear (12) mesh with each other.

3. The bidirectional winding twenty-roll mill according to claim 1, characterized in that, The rotating roller (43) is provided with several evenly distributed placement grooves (417), and a driving cylinder (44) is provided in the placement groove (417). An arc plate (45) is provided on the piston shaft of the driving cylinder (44), and the arc plate (45) is evenly distributed on the surface of the rotating roller (43).

4. The bidirectional winding twenty-roll mill according to claim 1, characterized in that, The mounting plate (10) has a pair of mounting holes (101) on the end face opposite to the rotating roller (43). The mounting holes (101) are provided with locking bolts (13) for fixing the mounting plate (10). The locking bolts (13) are threaded to the mounting holes (101) and extend into the base (1). The mounting plate (10) has a first electromagnet (14) on the end face opposite to the mounting holes (101). The limiting plate (9) has a first armature (15). When the first electromagnet (14) is energized, it attracts the first armature (15).

5. The bidirectional winding twenty-roll mill according to claim 1, characterized in that, The support components (6) are arranged in pairs on both sides of the rolling mill (2). The support components (6) include a support platform (61), a lifting platform (62), a support roller (63), and a lifting cylinder (64). The support platform (61) is fixedly installed in the groove of the base (1) and is located directly below the rotating roller (43). The upper end face of the support platform (61) is provided with a pair of lifting cylinders (64). The piston shaft of the lifting cylinder (64) is provided with a lifting platform (62) fixedly connected to it. Several evenly distributed second guide posts (65) are provided on the corners of the support platform (61). The lifting platform (62) is sleeved on the second guide posts (65). The lifting platform (62) is provided with a pair of support rollers (63). Each support roller (63) is pivotally connected to the lifting platform (62).

6. The bidirectional winding twenty-roll mill according to claim 1, characterized in that, The clamping assemblies (7) are arranged in pairs on both sides of the rolling mill (2). The clamping assemblies (7) include a rotating shaft (71), a placement plate (72), a first pressure roller (73), and a first cylinder (74). The housing (41) is provided with an installation channel (403) for installing the rotating shaft (71). The rotating shaft (71) is installed in the installation channel (403) by bearings. The placement plate (72) is fixedly connected to the rotating shaft (71). The placement plate (72) is provided with a first pressure roller (73) pivotally connected to it. The end of the rotating shaft (71) away from the first pressure roller (73) is provided with a connecting part (75). The housing (41) is provided with an installation base (76). The piston shaft of the first cylinder (74) is hinged to the connecting part (75). The bottom of the first cylinder (74) is hinged to the installation base (76).

7. The bidirectional winding twenty-roll mill according to claim 1, characterized in that, The rolling mill (2) includes a lower base (23) and an upper base (24) that can move up and down. The lower base (23) is provided with a pair of drive rollers (21), and the upper base (24) is provided with a pair of drive rollers (21). When the geared motor (22) is working, each drive roller (21) rotates synchronously. The rolling mill (2) is provided with a mounting bracket (18) at the rear. The mounting bracket (18) is provided with a number of evenly distributed drive shafts (25). The drive shafts (25) are mounted on the mounting bracket (18) through bearings. There is a connection between the drive shafts (25) and the drive rollers (21). The universal joint assembly (26) of both; the end of the drive shaft (25) facing away from the drive roller (21) is provided with a third gear (27) that rotates synchronously with it, and a drive gear (28) is provided between each of the third gears (27). The drive shaft (25) is mounted on the mounting bracket (18) by a pin. The mounting bracket (18) is also provided with a reduction motor (22) that drives the third gear (27) to rotate. A fourth gear (29) is provided on the motor shaft of the reduction motor (22). The fourth gear (29) meshes with the third gear (27). The side of the rolling mill (2) is provided with a limiting extrusion device (3).

8. The bidirectional winding twenty-roll mill according to claim 7, characterized in that, The limiting extrusion device (3) includes a driven roller (31), an extrusion roller (32), a lifting frame (33), and a second cylinder (34); the base (1) is provided with a pair of baffles (8), and the driven roller (31) is mounted on the baffles (8) by bearings; the second cylinder (34) is located on the side of the upper base (24), and the piston shaft of the second cylinder (34) is connected to the lifting frame (33). The lifting frame (33) is provided with an extrusion roller (32) pivotally connected to it, and the extrusion roller (32) is located directly above the driven roller (31).

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