A straightening and leveling device for steel plates

Abstract

This utility model provides a steel plate straightening and leveling device, including a leveling unit and a feeding unit. The feeding unit is located on one side of the leveling unit for feeding. The leveling unit includes a frame, powered rollers, two sets of spacing adjustment components, and driven rollers. The feeding unit is located on one side of the frame. Multiple powered rollers are arranged sequentially along the steel plate's traveling direction. Both ends of each powered roller are rotatably connected to a side wall of the frame, and the two sets of spacing adjustment components are respectively located in one side wall of the frame. Multiple driven rollers are arranged sequentially along the steel plate's traveling direction. Both ends of each driven roller are rotatably connected to a set of spacing adjustment components. The driven rollers are located above the powered rollers and are staggered from them. This steel plate straightening and leveling device can reduce scratches and wear on the outer wall of the steel plate, reduce costs, and continuously straighten and level the plate, ensuring production continuity and improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of plate straightening and leveling devices, and in particular relates to a straightening and leveling device for steel plates. Background Technology

[0002] With industrial development, especially in industries such as automobiles, shipbuilding, pressure vessels, construction machinery, precision instruments, and building curtain walls, the requirements for the flatness, dimensional accuracy, and surface quality of steel plates are constantly increasing. Steel plate straightening and leveling is a key process in metal processing, its role spanning the entire chain from raw material handling to end-product manufacturing, directly impacting product quality, production efficiency, and cost control. During production, uncoiled steel plates often bend due to internal stress. Traditional steel plate straightening and leveling devices mostly use mechanical structures to press the plate flat, which can lead to scratches and wear on the outer wall of the steel plate. Utility Model Content

[0003] In view of this, the present invention aims to propose a straightening and leveling device for steel plates to solve the problem that traditional mechanical structures for vertical pressure plate leveling cause scratches and wear on the outer wall of the steel plate.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A steel plate straightening and leveling device, characterized in that: it includes a leveling unit and a feeding unit, the feeding unit is located on the feeding side of the leveling unit, the leveling unit includes a frame, a powered roller, two sets of spacing adjustment components and a driven roller, the feeding unit is located on one side of the frame, multiple powered rollers are arranged sequentially along the steel plate traveling direction, the two ends of each powered roller are rotatably connected to a side wall of the frame, and the two sets of spacing adjustment components are respectively located in a side wall of the frame, multiple driven rollers are arranged sequentially along the steel plate traveling direction, the two ends of each driven roller are rotatably connected to a set of spacing adjustment components, the driven rollers are located above the powered rollers and are staggered with the powered rollers.

[0006] Furthermore, the spacing adjustment assembly includes a slider, a lead screw, and a handwheel. A square groove is provided in each of the two side walls of the frame. The two ends of the slider are slidably connected to a square groove. The two ends of each driven roller are rotatably connected to the side wall of a slider. One end of the lead screw is rotatably connected to the upper end of the slider, and the other end of the lead screw is fixedly connected to the handwheel. The outer thread of the lead screw is threaded into the frame.

[0007] Furthermore, the leveling unit also includes sprockets, chains, a first support plate, and a rotating motor. Each power roller is fitted with a sprocket, and each sprocket is fitted with a chain. Multiple sprockets form a synchronous transmission structure through the chain. The inner ring of the chain meshes with the outer ring of the output gear of the rotating motor. The rotating motor is fixedly installed on any one of the outer walls of the frame through the first support plate.

[0008] Furthermore, the feeding unit includes a support assembly, two sets of rotating steel coil assemblies, and a pressing arm. The pressing arm is located at the upper end of the frame, the support assembly is located on the foundation and on one side of the feeding end of the leveling unit, and the two sets of rotating steel coil assemblies are arranged axially symmetrically, with each set of rotating steel coil assemblies located on one side of the support assembly.

[0009] Furthermore, the support assembly includes a second support plate, a V-shaped frame, two sets of first telescopic cylinders, angle irons, and two rollers. The lower end of the second support plate is connected to the movable ends of the two first telescopic cylinders, and the fixed ends of the first telescopic cylinders are connected to the foundation. The four corners of the second support plate are slidably connected to the angle irons. One end of each angle iron is fixedly connected to the foundation. The V-shaped frame is set at the upper end of the second support plate. The two rollers are arranged parallel to each other, and the two ends of each roller are rotatably connected to the V-shaped frame.

[0010] Furthermore, the rotating steel coil assembly includes a track, a support frame, an abutment, a drive wheel, a driven wheel, a drive wheel shaft, and a driven wheel shaft. Two tracks are arranged parallel to each other on the base. The drive wheel shaft and the driven wheel shaft are arranged parallel to each other and rotatably connected to the lower end of the support frame. The two ends of the drive wheel shaft are fixedly sleeved with the drive wheel, and the two ends of the driven wheel shaft are fixedly sleeved with the driven wheel. The outer peripheries of the drive wheel and the driven wheel are both rolledly connected to the track. The abutment is rotatably connected to one side wall of the support frame. The abutment can abut against the inner hole of the steel coil and drive the steel coil to rotate.

[0011] Furthermore, a servo motor and a drive unit are provided inside the support frame. The servo motor is installed on the inner side wall of the support frame and the movable end of the servo motor is fixedly connected to the abutment. The drive unit is installed on the bottom inner wall of the support frame and the movable end of the drive unit is fixedly connected to the power wheel shaft.

[0012] Furthermore, the pressing arm includes a third support plate, two sets of second telescopic cylinders, a U-shaped frame, and a pressing roller. The third support plate is fixedly installed on the upper end of the frame, the fixed ends of the two sets of second telescopic cylinders are installed on the lower end of the third support plate, the movable end of each set of telescopic cylinders is fixedly connected to the closed end of the U-shaped frame, and the two ends of the pressing roller are respectively rotatably connected to one side wall of the open end of the U-shaped frame. The outer periphery of the pressing roller is rotatably connected to a steel coil.

[0013] Compared with the prior art, the steel plate straightening and leveling device of this utility model has the following advantages:

[0014] (1) The steel plate straightening and leveling device described in this utility model is equipped with a leveling unit, which can not only transport the bent plate, but also straighten and level the plate, replacing the traditional mechanical vertical pressing plate, reducing the scratches and wear on the outer wall of the steel plate, reducing the defect rate, reducing costs, and can also continuously straighten and level the plate, ensuring the continuity of production and improving production efficiency.

[0015] (2) The steel plate straightening and leveling device of this utility model, by staggering the driven roller and the power roller, compared with the traditional aligned roller arrangement, the staggered arrangement can increase the number of times the steel plate contacts the roller, making the straightening more precise, and can also make the steel plate more uniformly stressed, avoiding excessive local stress and secondary deformation.

[0016] (3) The steel plate straightening and leveling device of the present invention is provided with a spacing adjustment component 14, which can adapt to steel plates of different thicknesses without disassembling the component, reduce the time waste caused by frequent component replacement, and improve production efficiency.

[0017] (4) The steel plate straightening and leveling device described in this utility model is equipped with a pressure arm that can be rolled and connected to the side of the steel coil unwinding. It can cooperate with other devices to make the steel coil unwind more smoothly and allow the unwound steel plate to enter the leveling unit. It also avoids the steel coil from breaking apart during the unwinding process, improves safety, and ensures the safe operation of the factory. Attached Figure Description

[0018] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of a steel plate straightening and leveling device according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the leveling unit of a steel plate straightening and leveling device according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram showing the connection relationship between the sprocket and chain of a steel plate straightening and leveling device according to an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the support assembly of a steel plate straightening and leveling device according to an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of the rotating steel coil assembly of a steel plate straightening and leveling device according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the support frame of a steel plate straightening and leveling device according to an embodiment of the present utility model;

[0025] Figure 7 This is a schematic diagram of the pressing arm of a steel plate straightening and leveling device according to an embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the roller misalignment arrangement of a steel plate straightening and leveling device according to an embodiment of the present utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-Leveling unit; 11-Frame; 13-Power roller; 14-Gap adjustment assembly; 141-Slider; 142-Lead screw; 143-Handwheel; 15-Driven roller; 16-First support plate; 17-Rotating motor; 2-Feeding unit; 21-Support assembly; 211-Second support plate; 212-V-shaped frame; 213-First telescopic cylinder; 214-Angle iron; 215-Roller; 22-Rotating steel coil assembly; 221-Railway; 222-Support frame; 223-Abutment joint; 224-Powered rotating wheel; 225-Driven rotating wheel; 226-Servo motor; 227-Drive unit; 23-Pressure arm; 231-Third support plate; 232-Second telescopic cylinder; 233-U-shaped frame; 234-Pressure roller. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] like Figure 1 As shown, the system includes a leveling unit 1 and a feeding unit 2. The feeding unit 2 is located on the side of the leveling unit 1 where the material is fed. The leveling unit 1 includes a frame 11, powered rollers 13, two sets of spacing adjustment components 14, and driven rollers 15. The feeding unit 2 is located on one side of the frame 11. Multiple powered rollers 13 are arranged sequentially along the steel plate's traveling direction. Both ends of each powered roller 13 are rotatably connected to a side wall of the frame 11. The two sets of spacing adjustment components 14 are respectively located in a side wall of the frame 11. Multiple driven rollers 15 are arranged sequentially along the steel plate's traveling direction. Both ends of each driven roller 15 are rotatably connected to a set of spacing adjustment components 14. Figure 8 As shown, the driven roller 15 is positioned above the powered roller 13 and is staggered. By staggering the driven roller 15 and the powered roller 13, compared with the traditional aligned roller arrangement, the staggered arrangement can increase the number of contacts between the steel plate and the roller, making the straightening more precise, and also making the steel plate more evenly stressed, avoiding excessive local stress that could cause secondary deformation.

[0034] like Figure 2 As shown, the spacing adjustment assembly 14 includes a slider 141, a lead screw 142, and a handwheel 143. A square groove is provided in each of the two side walls of the frame 11. Both ends of the slider 141 are slidably connected to one of the square grooves. Both ends of each driven roller 15 are rotatably connected to the side wall of a slider 141. One end of the lead screw 142 is rotatably connected to the upper end of the slider 141, and the other end of the lead screw 142 is fixedly connected to the handwheel 143. The outer thread of the lead screw 142 is threaded into the frame 11. Rotating the handwheel 143 causes the lead screw 142 to rotate, which in turn moves the slider 141, adjusting the spacing between the driving roller 13 and the driven roller 15 to accommodate steel plates of different thicknesses. The spacing adjustment assembly 14 allows for the adaptation to steel plates of different thicknesses without disassembling the assembly, reducing time wasted due to frequent component changes and improving production efficiency.

[0035] like Figure 3As shown, the leveling unit 1 also includes a sprocket 16, a chain 17, a first support plate 16, and a rotating motor 17. Each power roller 13 is fitted with a sprocket 16, and each sprocket 16 is fitted with a chain 17. Multiple sprockets 16 form a synchronous transmission structure through the chain 17. The inner ring of the chain 17 meshes with the output gear of the rotating motor 17. The rotating motor 17 is fixedly mounted on any one of the outer walls of the frame 11 via the first support plate 16. The rotating motor 17 is existing technology, and its model number is JRL-15-8-570. The controller controls the rotation of the rotating motor 17. The rotation of the output gear of the rotating motor 17 drives the sprocket 16 through the chain 17, which in turn drives the power roller 13 to rotate. Under the action of friction, the power roller 13 and the driven roller 15 move the steel plate, continuously compressing the bent steel plate during the movement, ultimately achieving the purpose of straightening and leveling the steel plate. A leveling unit 1 is provided. The leveling unit 1 can not only transport bent plates, but also straighten and flatten plates, replacing the traditional mechanical pressure plate. This reduces scratches and wear on the outer wall of the steel plate, lowers the defect rate, reduces costs, and can also continuously straighten and flatten plates, ensuring production continuity and improving production efficiency.

[0036] like Figure 1 As shown, the feeding unit 2 includes a support component 21, two sets of rotating steel coil assemblies 22 and a pressing arm 23. The pressing arm 23 is located at the upper end of the frame 11. The support component 21 is located on the foundation and on one side of the feeding end of the leveling unit 1. The two sets of rotating steel coil assemblies 22 are arranged axially symmetrically, and each set of rotating steel coil assemblies 22 is located on one side of the support component 21.

[0037] like Figure 4 As shown, the support assembly 21 includes a second support plate 211, a V-shaped frame 212, two sets of first telescopic cylinders 213, angle irons 214, and two rollers 215. The lower end of the second support plate 211 is connected to the movable ends of the two first telescopic cylinders 213, and the fixed ends of the first telescopic cylinders 213 are connected to the foundation. The four corners of the second support plate 211 are slidably connected to the angle irons 214, and one end of each angle iron 214 is fixedly connected to the foundation. The V-shaped frame 212 is located on the upper end of the second support plate 211. The two rollers 215 are arranged parallel to each other, and both ends of each roller 215 are rotatably connected to the V-shaped frame 212. The first telescopic cylinders 213 are existing technology, and the model of the first telescopic cylinder 213 is DSTA-SD. The steel coil is hoisted onto the support assembly 21, which supports the steel coil. During the unwinding process, the controller controls the first telescopic cylinder 213 to extend and adjusts the position of the second support plate 211 to match the height of the steel coil, ensuring that the steel coil is unwound smoothly.

[0038] like Figure 5As shown, the rotating steel coil assembly 22 includes a track 221, a support frame 222, an abutment 223, a drive wheel 224, a driven wheel 225, a drive wheel shaft, and a driven wheel shaft. The two tracks 221 are arranged parallel to each other on the foundation. The drive wheel shaft and the driven wheel shaft are arranged parallel to each other and rotatably connected to the lower end of the support frame 222. The two ends of the drive wheel shaft are fixedly sleeved with the drive wheel 224, and the two ends of the driven wheel shaft are fixedly sleeved with the driven wheel 225. The outer peripheries of the drive wheel 224 and the driven wheel 225 are rolledly connected to the track 221. The abutment 223 is rotatably connected to one side wall of the support frame 222. The abutment 223 can abut against the inner hole of the steel coil and drive the steel coil to rotate.

[0039] like Figure 6 As shown, a servo motor 226 and a drive unit 227 are installed inside the support frame 222. The servo motor 226 is mounted on the inner wall of the support frame 222, and its movable end is fixedly connected to the abutment 223. The drive unit 226 is mounted on the bottom inner wall of the support frame 222, and its movable end is fixedly connected to the drive wheel shaft. The servo motor 226 is existing technology, and its model is Mitsubishi HG-SR102J. The drive unit 227 is an engine, which is existing technology, and its model is Wheatstone 180ST-J28020. The engine drives the power wheel 224 to rotate, which in turn drives the driven wheel 225 to rotate, causing the support frame 222 to move along the track 221 and abut the abutment 223 against the inner hole of the steel coil. The servo motor 226 rotates the abutment 223, causing the steel coil to rotate for unwinding.

[0040] like Figure 7 As shown, the pressing arm 23 includes a third support plate 231, two sets of second telescopic cylinders 232, a U-shaped frame 233, and a pressing roller 234. The third support plate 231 is fixedly installed on the upper end of the frame 11. The fixed ends of the two sets of second telescopic cylinders 232 are installed on the lower end of the third support plate 231. The movable end of each set of telescopic cylinders 232 is fixedly connected to the closed end of the U-shaped frame. The two ends of the pressing roller 234 are rotatably connected to one side wall of the open end of the U-shaped frame, and the outer periphery of the pressing roller 234 is rotatably connected to the steel coil. The second telescopic cylinder 232 is existing technology, and its model is DSTA-SD160. The controller controls the movement of the second telescopic cylinder 232 and adjusts the height of the U-shaped frame 233 and the pressing roller 234 so that the pressing roller 234 can be rotatably connected to the side of the steel coil being unwound. The pressure arm 23 is set up and can be rolled on the side of the steel coil unwinding. It can work with other devices to make the steel coil unwind more smoothly and allow the unwound steel plate to enter the leveling unit 1. It also prevents the steel coil from breaking apart during the unwinding process, improves safety, and ensures the safe operation of the factory.

[0041] The working process of a steel plate straightening and leveling device:

[0042] The steel coil is hoisted onto the support assembly 21, which supports the coil. Turning the handwheel 143 rotates the lead screw 142, which in turn moves the slider 141, adjusting the distance between the power roller 13 and the driven roller 15 to accommodate steel plates of different thicknesses. The controller controls the movement of the second telescopic cylinder 232 and adjusts the height of the U-shaped frame 233 and the pressure roller 234, ensuring the pressure roller 234 can roll along the unwinding side of the steel coil. After adjustment, the controller is turned on, and the engine drives the power wheel 224 to rotate. The power wheel 224 rotates, driving the driven wheel 225, causing the support frame 222 to move along the track 221 and engage the abutment 223 with the inner hole of the steel coil. The servo motor 226 rotates the abutment 223, causing the steel coil to rotate for unwinding. The controller controls the rotation of the rotary motor 17. The output gear of the rotary motor 17 rotates, driving the sprocket 16 via the chain 17, which in turn drives the power roller 13 to rotate. Under the action of friction, the power roller 13 and the driven roller 15 move the steel plate, continuously compressing the bent steel plate during the movement, ultimately achieving the purpose of straightening and flattening the steel plate. Furthermore, during the unwinding process of the steel coil, the controller controls the extension of the first telescopic cylinder 213 to adjust the position of the second support plate 211 to match the height of the steel coil, ensuring production continues.

[0043] The control method in this embodiment is controlled by a controller. The controller circuit can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this document is mainly used to protect mechanical devices, and the control method and circuit connection will not be explained in detail here.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A straightening and leveling device for steel plates, characterized in that: The system includes a leveling unit (1) and a feeding unit (2). The feeding unit (2) is located on the side of the feeding unit (1). The leveling unit (1) includes a frame (11), a power roller (13), two sets of spacing adjustment components (14), and a driven roller (15). The feeding unit (2) is located on one side of the frame (11). Multiple power rollers (13) are arranged sequentially along the direction of the steel plate. The two ends of each power roller (13) are rotatably connected to a side wall of the frame (11). The two sets of spacing adjustment components (14) are respectively located in a side wall of the frame (11). Multiple driven rollers (15) are arranged sequentially along the direction of the steel plate. The two ends of each driven roller (15) are rotatably connected to a set of spacing adjustment components (14). The driven rollers (15) are located above the power rollers (13) and are staggered from the power rollers (13).

2. The straightening and leveling device for a steel plate body according to claim 1, characterized in that: The spacing adjustment assembly (14) includes a slider (141), a lead screw (142), and a handwheel (143). A square groove is provided in each of the two side walls of the frame (11). The two ends of the slider (141) are slidably connected to a square groove. The two ends of each driven roller (15) are rotatably connected to one end of a slider (141). One end of the lead screw (142) is rotatably connected to one side of the slider (141). The other end of the lead screw (142) is fixedly connected to the handwheel (143). The outer thread of the lead screw (142) is threaded to one end of the frame (11).

3. The straightening and leveling device for a steel plate body according to claim 1, characterized in that: The leveling unit (1) also includes sprockets, chains, a first support plate (16) and a rotating motor (17). A sprocket is sleeved around the periphery of each power roller (13), and a chain is sleeved around the periphery of each sprocket. Multiple sprockets form a synchronous transmission structure through the chain. The inner ring of the chain meshes with the periphery of the output gear of the rotating motor (17). The rotating motor (17) is fixedly installed on any one of the outer walls of the frame (11) through the first support plate (16).

4. The straightening and leveling device for a steel plate body according to claim 1, characterized in that: The feeding unit (2) includes a support assembly (21), two sets of rotating steel coil assemblies (22) and a pressing arm (23). The pressing arm (23) is located at the upper end of the frame (11). The support assembly (21) is located on the foundation and on one side of the feeding end of the leveling unit (1). The two sets of rotating steel coil assemblies (22) are axially symmetrically arranged, and each set of rotating steel coil assemblies (22) is located on one side of the support assembly (21).

5. The straightening and leveling device for a steel plate body according to claim 4, characterized in that: The support assembly (21) includes a second support plate (211), a V-shaped frame (212), two sets of first telescopic cylinders (213), angle irons (214), and two rollers (215). The lower end of the second support plate (211) is connected to the movable ends of the two first telescopic cylinders (213), and the fixed ends of the first telescopic cylinders (213) are connected to the foundation. The four corners of the second support plate (211) are slidably connected to the inside of an angle iron (214), and one end of each angle iron (214) is fixedly connected to the foundation. The V-shaped frame (212) is set on the upper end of the second support plate (211). The two rollers (215) are arranged parallel to each other, and the two ends of each roller (215) are rotatably connected to the inside of the V-shaped frame (212). The outer periphery of the roller (215) is rotatably connected to the steel coil.

6. The straightening and leveling device for a steel plate body according to claim 4, characterized in that: The rotating steel coil assembly (22) includes a track (221), a support frame (222), an abutment (223), a drive wheel (224), a driven wheel (225), a drive wheel shaft, and a driven wheel shaft. The two tracks (221) are arranged parallel to each other on the foundation. The drive wheel shaft and the driven wheel shaft are arranged parallel to each other and rotatably connected to the lower end of the support frame (222). The two ends of the drive wheel shaft are fixedly sleeved with the drive wheel (224), and the two ends of the driven wheel shaft are fixedly sleeved with the driven wheel (225). The outer peripheries of the drive wheel (224) and the driven wheel (225) are both rolledly connected to the track (221). The abutment (223) is rotatably connected to one side wall of the support frame (222). The abutment (223) can abut against the inner hole of the steel coil and drive the steel coil to rotate.

7. The straightening and leveling device for a steel plate body according to claim 6, characterized in that: A servo motor (226) and a drive unit (227) are provided inside the support frame (222). The servo motor (226) is installed on the inner side wall of the support frame (222), and the movable end of the servo motor (226) is fixedly connected to the abutment (223). The drive unit (227) is installed on the bottom inner wall of the support frame (222), and the movable end of the drive unit (227) is fixedly connected to the power wheel shaft.

8. The straightening and leveling device for a steel plate body according to claim 5, characterized in that: The pressing arm (23) includes a third support plate (231), two sets of second telescopic cylinders (232), a U-shaped frame (233), and a pressing roller (234). The third support plate (231) is fixedly installed on the upper end of the frame (11). The fixed end of each set of second telescopic cylinders (232) is installed on the lower end of the third support plate (231). The movable end of each set of telescopic cylinders (232) is fixedly connected to the closed end of the U-shaped frame. The two ends of the pressing roller (234) are respectively rotatably connected to a side wall at the other end of the U-shaped frame. The outer periphery of the pressing roller (234) is rotatably connected to the side of the steel coil unwinding.

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