Seamless steel tube cold pilger mill

Abstract

The utility model belongs to the technical field of seamless steel pipe production, and relates to a seamless steel pipe cold pilger mill which comprises a main body, a cold-rolling mill is fixedly installed at one end of the top of the main body, a movable plate is arranged at the other end of the top of the main body in a sliding mode, and a first motor is fixedly connected to one side of the movable plate. Two symmetrical lead screws are rotationally arranged above the main body, the core rod is located between the two lead screws, each lead screw is sleeved with a sliding block in a threaded mode, a lubricating liquid smearing assembly is arranged at the top of each sliding block, a transmission assembly is arranged on an output shaft of the first motor, and the transmission assembly drives the two lead screws to rotate synchronously. Compared with the prior art, the core rod sliding device has the advantages that in the sliding process, the smearing assembly smears lubricating liquid on the core rod, the surface of the core rod is automatically sprayed with the lubricating liquid while the core rod is driven to rotate, the sliding block does not need to be driven to move, the core rod does not need to be driven to rotate, and the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of seamless steel pipe production, and relates to a cold rolling mill for seamless steel pipes. Background Art

[0002] A steel pipe cold rolling mill is a process equipment that cold-rolls a rough pipe using an annular hole. This mill has good bloom-opening performance and can also roll non-ferrous metal seamless steel pipes with ordinary precision. The biggest feature of the steel pipe cold rolling mill is its high material utilization rate, and its precision and surface roughness are both better than those of cold-drawn pipes.

[0003] A steel pipe cold rolling mill disclosed in Chinese Patent CN220717228U includes a rolling rack, a workbench, a mandrel, a cleaning mechanism, a spraying mechanism, and a clamping mechanism. Through the cleaning mechanism, the polished pipe rolled out can be cleaned and wiped, effectively solving the problem that the surface of the polished pipe needs to be cleaned manually after rolling, as the existing steel pipe cold rolling mills do not have corresponding functions and can only be cleaned manually later; through the spraying mechanism, mechanized spraying of lubricating fluid can be achieved, effectively solving the problem that the existing steel pipe cold rolling mills still use manual labor to apply the lubricating fluid on the surface of the mandrel.

[0004] When this cold rolling mill is in use, the liquid extraction pump is started to extract the lubricating fluid in the liquid storage tank through the connecting pipe. After the lubricating fluid passes through the liquid outlet pipe, it is sprayed out through the nozzle. At the same time, the moving motor controls the rotation of the threaded rod, so that the moving block moves on the moving frame. When spraying the lubricating fluid, it is also necessary to drive the mandrel to rotate through the rotating motor, and two motors are required to drive respectively, increasing the production cost. Therefore, whether it is possible to automatically spray the lubricating fluid on the surface of the mandrel while driving the mandrel to rotate to save production costs has become a new research direction for those skilled in the art.

[0005] To solve the above problems, the utility model proposes a cold rolling mill for seamless steel pipes. Content of the Utility Model

[0006] To solve the problems in the background art, the utility model proposes a cold rolling mill for seamless steel pipes.

[0007] To achieve the above object, the technical solution adopted by the utility model is as follows: it includes a main body, one end of the top of the main body is fixedly installed with a cold rolling mill, the other end of the top of the main body is slidably provided with a moving plate, one side of the moving plate is fixedly connected with a first motor, and the end of the output shaft of the first motor is fixedly provided with a mandrel;

[0008] Two symmetrically arranged lead screws are rotatably provided above the main body. The mandrel is located between the two lead screws. Each lead screw is threadedly sleeved with a slider, and the tops of the sliders are all provided with lubricating fluid application assemblies;

[0009] A transmission component is arranged on the output shaft of the first motor, and the transmission component drives the two lead screws to rotate synchronously.

[0010] Furthermore, two sliding grooves are symmetrically formed on the upper surface of the main body. Two positioning blocks are fixedly connected to the bottom of the moving plate, and the positioning blocks are respectively slidably connected in the corresponding sliding grooves.

[0011] A cylinder is fixedly connected to the top of the main body, and the end of the piston rod at the output end of the cylinder is fixedly connected to one side of the moving plate.

[0012] Furthermore, a fixing plate is fixedly connected to one side of the moving plate. The first motor is fixedly connected to the top of the fixing plate. The output shaft of the first motor rotates through the moving plate. The end of the output shaft of the first motor is fixedly connected with a rotating plate. A three-jaw chuck is fixedly connected to one side of the rotating plate. The three-jaw chuck and the first motor are respectively located on both sides of the moving plate. One end of the mandrel is fixed in the three-jaw chuck.

[0013] Furthermore, a plurality of first hydraulic cylinders are fixedly connected to the middle of the top surface of the main body at intervals. The tops of the hydraulic rods at the output ends of the first hydraulic cylinders are all fixedly connected with U-shaped supporting plates, and the plurality of supporting plates are arranged along the axial direction of the mandrel.

[0014] A supporting roller is rotatably connected inside each of the supporting plates, and the mandrel is movably arranged on the top of the supporting roller.

[0015] Furthermore, two symmetrically arranged fixing blocks are fixedly connected to the top of the main body. The fixing blocks are U-shaped blocks, and the shapes of the top surface and the bottom surface of the fixing blocks are both U-shaped. The lead screws respectively rotate through the corresponding fixing blocks, and the ends of the lead screws all penetrate through the moving plate. The sliding blocks are located in the corresponding fixing blocks, and the sliding blocks are slidably connected to the upper surface of the main body.

[0016] Furthermore, the transmission component includes two belts. A first pulley is slidably sleeved on the outer surface of each of the two lead screws near one end of the moving plate, and the first pulleys are respectively rotatably connected to one side of the moving plate.

[0017] Two card slots are formed on the outer surface of each of the two lead screws near one end of the moving plate. Two clamping blocks are fixedly connected to the inner wall of each of the first pulleys, and the clamping blocks are respectively slidably connected in the corresponding card slots.

[0018] Two second pulleys are fixedly sleeved on the output shaft of the first motor, and the second pulleys correspond to the first pulleys one by one. The belts are respectively sleeved on the corresponding first pulleys and second pulleys for transmission.

[0019] Further, each of the smearing components includes a clamping plate. The tops of the sliders are fixedly connected with sliding plates. One end of each sliding plate is in sliding fit with the upper surface of the corresponding fixed block. The tops of the sliding plates are fixedly connected with second hydraulic cylinders. The second hydraulic cylinders are arranged horizontally. The clamping plates are fixedly connected to the output ends of the corresponding second hydraulic cylinders.

[0020] One side of each clamping plate away from the second hydraulic cylinder is arc-shaped. A sponge is fixedly connected to the arc-shaped surface of the clamping plate. A plurality of nozzles are fixedly connected to the arc-shaped surface of the clamping plate at intervals at the position of the sponge. A conveying component for conveying lubricating fluid to the nozzles is connected to each clamping plate.

[0021] Further, the conveying component includes a pump body. The bottom surface of the main body is fixedly connected with a liquid storage tank. The two sides of the liquid storage tank are fixedly connected with pump bodies. The input pipes of the pump bodies extend into the liquid storage tank. The end parts of the output pipes of the pump bodies are respectively fixedly connected to the corresponding clamping plates. The input ends of the nozzles are respectively communicated with the corresponding output pipes.

[0022] Further, one end of the main body close to the cold rolling mill is fixedly connected with a support seat. The top of the support seat is fixedly connected with a support plate. A through hole is opened in the support plate. A collar is rotatably connected inside the through hole. Both ends of the collar extend out of the through hole. A toothed ring is fixedly sleeved on one end of the collar. A cleaning cloth is fixedly arranged on the inner wall of the collar.

[0023] The top of the support seat is fixedly connected with a second motor. A gear is fixedly connected to the output shaft of the second motor. The gear meshes with the toothed ring.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] The seamless steel pipe cold rolling mill is provided with a belt. The belt drive is sleeved on the corresponding first pulley and second pulley. When the first motor drives the three-jaw chuck to rotate and the mandrel rotates, the output shaft of the first motor will also drive the second pulley to rotate. The corresponding first pulley is driven to rotate through the belt, so that the two lead screws rotate synchronously. Further, the two sliders slide synchronously on the top of the main body. During the sliding process, the smearing component smears lubricating fluid on the mandrel, so that the surface of the mandrel is automatically sprayed with lubricating fluid while driving the mandrel to rotate. It is not necessary to separately drive the slider to move and the mandrel to rotate, reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three-dimensional structural schematic diagram of Embodiment 1 of the utility model;

[0027] Figure 2 is a structural schematic diagram of the belt in Embodiment 1 of the utility model;

[0028] Figure 3It is a schematic structural diagram of the clamping plate in Embodiment 1 of the present utility model;

[0029] Figure 4 It is a three-dimensional structural diagram of Embodiment 2 of the present utility model;

[0030] Figure 5 It is a schematic structural diagram of the support plate in Embodiment 2 of the present utility model.

[0031] In the figure: 1, main body; 2, fixing block; 3, liquid storage tank; 4, first hydraulic cylinder; 5, support plate; 6, pump body; 7, support roller; 8, sliding plate; 9, clamping plate; 10, lead screw; 11, air cylinder; 12, rotating plate; 13, three-jaw chuck; 14, second hydraulic cylinder; 15, mandrel; 16, cold rolling mill; 17, moving plate; 18, first belt pulley; 19, second belt pulley; 20, fixing plate; 21, chute; 22, first motor; 23, belt; 24, nozzle; 25, support plate; 26, second motor; 27, collar; 28, toothed ring; 29, cleaning cloth; 30, gear; 31, slider. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] Embodiment 1: As Figures 1 - 3 shown, the technical solution adopted by the present utility model is as follows: a seamless steel pipe cold rolling mill, including a main body 1, a cold rolling mill 16 is fixedly installed at one end of the top of the main body 1, and a moving plate 17 is slidably arranged at the other end of the top of the main body 1.

[0034] Two chutes 21 are symmetrically opened on the upper surface of the main body 1, two positioning blocks are fixedly connected to the bottom of the moving plate 17, and the positioning blocks are respectively slidably connected in the corresponding chutes 21.

[0035] A cylinder 11 is fixedly connected to the top of the main body 1, and the end of the piston rod at the output end of the cylinder 11 is fixedly connected to one side of the moving plate 17.

[0036] A first motor 22 is fixedly connected to one side of the moving plate 17, and a mandrel 15 is fixedly arranged at the end of the output shaft of the first motor 22.

[0037] One side of the moving plate 17 is fixedly connected to a fixed plate 20, the first motor 22 is fixedly connected to the top of the fixed plate 20, and the output shaft of the first motor 22 rotatably penetrates through the moving plate 17. The end of the output shaft of the first motor 22 is fixedly connected to a rotating plate 12, one side of the rotating plate 12 is fixedly connected to a three-jaw chuck 13, and the three-jaw chuck 13 and the first motor 22 are respectively located on both sides of the moving plate 17. One end of the mandrel 15 is fixed in the three-jaw chuck 13.

[0038] In the middle of the top surface of the main body 1, a plurality of first hydraulic cylinders 4 are fixedly connected at intervals, and the tops of the hydraulic rods at the output ends of the first hydraulic cylinders 4 are all fixedly connected to U-shaped support plates 5, and the plurality of support plates 5 are arranged along the axial direction of the mandrel 15.

[0039] Support rollers 7 are rotatably connected inside the support plates 5, and the mandrel 15 is movably arranged on the tops of the support rollers 7. The support rollers 7 support the mandrel 15, making the rotation of the mandrel 15 more stable.

[0040] Above the main body 1, two symmetrically arranged lead screws 10 are rotatably provided, and the mandrel 15 is located between the two lead screws 10. A slider 31 is threadedly sleeved on each lead screw 10.

[0041] The top of the main body 1 is fixedly connected to two symmetrically arranged fixed blocks 2. The fixed blocks 2 are U-shaped blocks, and the shapes of the top surface and the bottom surface of the fixed blocks 2 are both U-shaped. The lead screws 10 respectively rotatably penetrate through the corresponding fixed blocks 2, and the ends of the lead screws 10 penetrate through the moving plate 17. The slider 31 is located inside the corresponding fixed block 2, and the slider 31 is slidably connected to the upper surface of the main body 1. When the lead screws 10 rotate, the slider 31 slides on the top of the main body 1.

[0042] A transmission assembly is arranged on the output shaft of the first motor 22, and the transmission assembly drives the two lead screws 10 to rotate synchronously.

[0043] The transmission assembly includes two belts 23. On the outer surfaces of one ends of the two lead screws 10 close to the moving plate 17, first belt pulleys 18 are slidably sleeved, and the first belt pulleys 18 are respectively rotatably connected to one side of the moving plate 17.

[0044] On the outer surfaces of one ends of the two lead screws 10 close to the moving plate 17, two card slots are respectively opened, and two clamping blocks are fixedly connected to the inner walls of the first belt pulleys 18. The clamping blocks are respectively slidably connected in the corresponding card slots. So that the first belt pulley 18 can only slide along the card slot on the lead screw 10.

[0045] Two second belt pulleys 19 are fixedly sleeved on the output shaft of the first motor 22. The second belt pulleys 19 correspond to the first belt pulleys 18 one by one, and the belts 23 are respectively sleeved on the corresponding first belt pulleys 18 and second belt pulleys 19 in a transmission manner.

[0046] Lubricating fluid application assemblies are arranged on the tops of the sliders 31.

[0047] The smearing assemblies all include clamping plates 9. Skateboards 8 are fixedly connected to the tops of the sliders 31, and one end of each skateboard 8 is in sliding fit with the upper surface of the corresponding fixed block 2. Second hydraulic cylinders 14 are fixedly connected to the tops of the skateboards 8. The second hydraulic cylinders 14 are arranged horizontally, and the clamping plates 9 are fixedly connected to the output ends of the corresponding second hydraulic cylinders 14.

[0048] One side of each clamping plate 9 away from the second hydraulic cylinder 14 is arc-shaped, and sponges are fixedly connected to the arc-shaped surfaces of the clamping plates 9. A plurality of nozzles 24 are fixedly connected to the arc-shaped surfaces of the clamping plates 9 at intervals at the positions of the sponges, and conveying assemblies for conveying lubricating fluid to the nozzles 24 are connected to the clamping plates 9.

[0049] The conveying assemblies include pump bodies 6. A liquid storage tank 3 is fixedly connected to the bottom surface of the main body 1, and lubricating fluid is arranged inside the liquid storage tank 3. Pump bodies 6 are fixedly connected to both sides of the liquid storage tank 3. The input pipes of the pump bodies 6 all extend into the liquid storage tank 3, and the end parts of the output pipes of the pump bodies 6 are respectively fixedly connected to the corresponding clamping plates 9. The input ends of the nozzles 24 are respectively communicated with the corresponding output pipes.

[0050] Working principle:

[0051] During use, place the mandrel 15 on the tops of a plurality of support rollers 7. Start the first hydraulic cylinder 4, and the hydraulic rod at the output end of the first hydraulic cylinder 4 pushes the support plate 5 upward. Drive the support rollers 7 to move upward, so that the mandrel 15 moves upward until one end of the mandrel 15 corresponds to the clamping opening of the three-jaw chuck 13 left and right.

[0052] Start the cylinder 11, and the piston rod at the output end of the cylinder 11 pushes the moving plate 17 to slide toward the side close to the mandrel 15. At the same time, the positioning blocks at the bottom of the moving plate 17 will slide in the corresponding sliding grooves 21, so that the moving plate 17 slides smoothly.

[0053] The moving plate 17 drives the first motor 22, the rotating plate 12, and the three-jaw chuck 13 to approach the end of the mandrel 15. At the same time, the moving plate 17 slides on the lead screw 10, driving the first belt pulley 18 to slide on the corresponding lead screw 10.

[0054] Until one end of the mandrel 15 is located inside the three-jaw chuck 13. Operate the three-jaw chuck 13 to fix one end of the mandrel 15 on the three-jaw chuck 13.

[0055] Start the second hydraulic cylinder 14, and push the clamping plate 9 to slide toward the outer surface of the mandrel 15 until the sponge on the arc-shaped surface of the clamping plate 9 adheres to the outer surface of the mandrel 15.

[0056] Start the pump body 6 and the first motor 22. The output shaft of the first motor 22 rotates forward, driving the rotating plate 12 and the three-jaw chuck 13 to rotate, so that the mandrel 15 rotates.

[0057] The output shaft of the first motor 22 drives the second pulley 19 to rotate, and drives the first pulley 18 to rotate through the belt 23. The first pulley 18 rotates on one side of the moving plate 17, and at the same time, the clamping block on the first pulley 18 drives the lead screw 10 to rotate together, so that the two lead screws 10 rotate synchronously.

[0058] The lead screw 10 drives the slider 31 to slide on the upper surface of the main body 1, driving the sliding plate 8 to slide on the top of the fixed block 2 to the side away from the moving plate 17. The clamping plate 9 slides on the outer surface of the mandrel 15, and the sponge wipes on the outer surface of the mandrel 15.

[0059] The pump body 6 pumps the lubricating fluid in the liquid storage tank 3 to the nozzle 24, and the nozzle 24 sprays the lubricating fluid onto the mandrel 15, and the sponge applies the lubricating fluid. Therefore, when the clamping plate 9 applies along the mandrel 15, the mandrel 15 rotates, making the application of the lubricating fluid more uniform.

[0060] When the clamping plate 9 moves to the end of the mandrel 15, the pump body 6 is turned off, and the output shaft of the first motor 22 rotates in reverse, so that the sliding plate 8 slides to the side close to the moving plate 17, facilitating the next application.

[0061] Embodiment 2: As Figures 4 - 5 shown, the difference between this embodiment and Embodiment 1 is that: one end of the main body 1 close to the cold rolling mill 16 is fixedly connected with a support seat, the top of the support seat is fixedly connected with a support plate 25, and a through hole is opened on the support plate 25. The through hole corresponds to the cold rolling port of the cold rolling mill 16.

[0062] A collar 27 is rotatably connected inside the through hole. Both ends of the collar 27 extend to the outside of the through hole. A toothed ring 28 is fixedly sleeved on one end of the collar 27, and a cleaning cloth 29 is fixedly arranged on the inner wall of the collar 27.

[0063] The top of the support seat is fixedly connected with a second motor 26, and a gear 30 is fixedly connected to the output shaft of the second motor 26. The gear 30 meshes with the toothed ring 28.

[0064] Working principle:

[0065] During use, the steel pipe is pushed into the cold rolling mill 16, so that the steel pipe passes through the inside of the collar 27, and the cleaning cloth 29 is closely attached to the outer surface of the steel pipe.

[0066] The second motor 26 is started, the output shaft of the second motor 26 drives the gear 30 to rotate, so that the toothed ring 28 rotates, driving the collar 27 to rotate, and the cleaning cloth 29 rotates on the outer surface of the steel pipe. When the steel pipe is pushed into the cold rolling mill 16, the cleaning cloth 29 cleans the outer surface of the steel pipe.

[0067] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Seamless steel tube cold rolling mill, characterized in that: It comprises a main body (1), a cold rolling mill (16) is fixedly mounted on one end of the top of the main body (1), a movable plate (17) is slidably arranged on the other end of the top of the main body (1), a first motor (22) is fixedly connected to one side of the movable plate (17), and a mandrel (15) is fixedly arranged on the end of the output shaft of the first motor (22); Two symmetrical screw rods (10) are rotatably arranged above the main body (1), a core rod (15) is located between the two screw rods (10), a slider (31) is threadedly sleeved on each screw rod (10), and a lubricating liquid application component is arranged on the top of the slider (31); A transmission assembly is arranged on the output shaft of the first motor (22), and the transmission assembly drives the two screw rods (10) to rotate synchronously.

2. The seamless steel tube cold rolling mill according to claim 1, characterized in that: The upper surface of the main body (1) is symmetrically provided with two slide grooves (21); the bottom of the movable plate (17) is fixedly connected with two positioning blocks, and the positioning blocks are respectively slidably connected in the corresponding slide grooves (21); The top of the main body (1) is fixedly connected to a cylinder (11), and the end of a piston rod at the output end of the cylinder (11) is fixedly connected to one side of a moving plate (17).

3. The seamless steel tube cold rolling mill according to claim 1, characterized in that: One side of the movable plate (17) is fixedly connected to a fixed plate (20), a first motor (22) is fixedly connected to the top of the fixed plate (20), an output shaft of the first motor (22) rotates and passes through the movable plate (17), an end of the output shaft of the first motor (22) is fixedly connected to a rotating plate (12), one side of the rotating plate (12) is fixedly connected to a three-jaw chuck (13), the three-jaw chuck (13) and the first motor (22) are respectively located on two sides of the movable plate (17), and one end of the core rod (15) is fixed in the three-jaw chuck (13).

4. The seamless steel tube cold rolling mill according to claim 1, characterized in that: A plurality of first hydraulic cylinders (4) are fixedly connected at intervals in the middle of the top surface of the main body (1), and the tops of the hydraulic rods at the output ends of the first hydraulic cylinders (4) are fixedly connected with U-shaped support plates (5), and the plurality of support plates (5) are arranged along the axial direction of the mandrel (15); The interior of the support plate (5) is rotatably connected to a support roller (7), and a core rod (15) is movably arranged on the top of the support roller (7).

5. The seamless steel tube cold rolling mill according to claim 1, characterized in that: The top of the main body (1) is fixedly connected to two symmetrical fixed blocks (2), the fixed blocks (2) are U-shaped blocks, the top and bottom surfaces of the fixed blocks (2) are both U-shaped, the screw rods (10) rotate and penetrate the corresponding fixed blocks (2), the ends of the screw rods (10) penetrate the movable plate (17), the sliders (31) are located in the corresponding fixed blocks (2), and the sliders (31) are slidably connected to the upper surface of the main body (1).

6. The seamless steel tube cold rolling mill according to claim 1, characterized in that: The transmission assembly comprises two belts (23), and first pulleys (18) are slidably sleeved on the outer surfaces of the two screw rods (10) at one end close to the movable plate (17), and the first pulleys (18) are rotatably connected to one side of the movable plate (17); Two slots are provided on the outer surfaces of the two screw rods (10) at one end close to the movable plate (17), and two blocks are fixedly connected to the inner wall of the first pulley (18), and the blocks are slidably connected to the corresponding slots respectively; Two second pulleys (19) are fixedly sleeved on the output shaft of the first motor (22), and the second pulleys (19) correspond to the first pulleys (18) one by one, and the belts (23) are respectively sleeved on the corresponding first pulleys (18) and second pulleys (19).

7. The seamless steel tube cold rolling mill according to claim 1, characterized in that: The smearing components all include a clamping plate (9), the top of the sliding block (31) is fixedly connected to a sliding plate (8), one end of the sliding plate (8) is slidably matched with the upper surface of the corresponding fixed block (2), the top of the sliding plate (8) is fixedly connected to a second hydraulic cylinder (14), the second hydraulic cylinder (14) is arranged horizontally, and the clamping plate (9) is fixedly connected to the output end of the corresponding second hydraulic cylinder (14); The side of the clamping plate (9) away from the second hydraulic cylinder (14) is arranged in an arc shape, a sponge is fixedly connected to the arc surface of the clamping plate (9), a plurality of nozzles (24) are fixedly connected at intervals on the arc surface of the clamping plate (9) at the sponge, and a delivery component for delivering lubricating liquid to the nozzles (24) is connected to the clamping plate (9).

8. The seamless steel tube cold rolling mill according to claim 7, characterized in that: The conveying assembly comprises a pump body (6), the bottom surface of the main body (1) is fixedly connected to a liquid storage tank (3), both sides of the liquid storage tank (3) are fixedly connected to the pump body (6), the input pipe of the pump body (6) extends into the liquid storage tank (3), the ends of the output pipe of the pump body (6) are respectively fixedly connected to the corresponding clamping plates (9), and the input ends of the nozzles (24) are respectively connected to the corresponding output pipes.

9. The seamless steel tube cold rolling mill according to claim 1, characterized in that: The end of the main body (1) close to the cold rolling mill (16) is fixedly connected to a support seat, the top of the support seat is fixedly connected to a support plate (25), a through hole is opened on the support plate (25), a sleeve (27) is rotatably connected inside the through hole, both ends of the sleeve (27) extend to the outside of the through hole, one end of the sleeve (27) is fixedly sleeved with a gear ring (28), and a cleaning cloth (29) is fixedly arranged on the inner wall of the sleeve (27); A second motor (26) is fixedly connected to the top of the support seat, a gear (30) is fixedly connected to the output shaft of the second motor (26), and the gear (30) is meshed with the gear ring (28).

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