Maintenance method for double eccentric rack roll gap adjusting device

Abstract

The present application belongs to the technical field of rack maintenance, and particularly relates to a double eccentric rack roller gap adjusting device maintenance method, which comprises the following steps: S1. After cleaning the whole rack upper surface, a fixed point is found as a reference position, and a mark is made on the oil slinger to prevent the eccentric sleeve from deviating and being unable to be accurately positioned during the disassembly and assembly process; S2. The roller gap adjusting device end covers, side sealing plates and screw rod assemblies at both ends are sequentially removed; S3. A new eccentric sleeve connecting plate is replaced; S4. The eccentric sleeve position is restored to the position before the rack is disassembled, and the adjusted screw rod assembly is slowly inserted into the rack, and the screw rod assembly lifting lug is inserted into the eccentric sleeve connecting plate; S5. The end covers at both ends are sequentially installed in place; and S6. A sleeve wrench is used to adjust the shaft center distance, so that the shaft center distance can be adjusted to the range specified in the drawing. The present application can locally replace and maintain the stuck adjusting device, and the operation is more fast and convenient.

Description

Technical Field

[0001] This invention belongs to the field of machine frame maintenance technology, and in particular relates to a maintenance method for a double eccentric machine frame roll gap adjustment device. Background Technology

[0002] The continuous casting and rolling copper rod production line uses a twin-roll mill. Rolls are installed at the ends of the shaft, and the rolling pass is ensured by adjusting the roll gap. The roughing mill uses double eccentric adjustment, while the finishing mill uses single eccentric adjustment. The shaft is designed to be center-adjustable, mainly to ensure the rolling pass, and the processed rolls can be reused, greatly reducing production costs.

[0003] In actual use, the rolling mill of the copper rod continuous casting and rolling production line suffers from several problems. Due to the lack of effective operating procedures and awareness of cold rolling damage, cold rolling is often used to treat blocked workpieces. However, after treatment, the roll gap widens. This is mainly because the workpiece hardens after cooling, causing the rolls to be pushed outwards. The reverse force from the workpiece acts on the near-end eccentric sleeve through the rolls and shaft. The near-end eccentric sleeve then transmits this reverse force to the far-end eccentric sleeve through the connecting plate. However, due to the limitations of the adjusting screw and lifting lugs, the force transmitted to the far-end eccentric sleeve is very small, resulting in the upper and lower eccentric sleeves not rotating synchronously. This causes the eccentric sleeve connecting plate to twist and deform, ultimately leading to the screw adjusting device seizing and failing. Seizing also easily occurs at the roll gap adjusting device on the stand, preventing normal roll gap adjustment and limiting the use of only one roll size, significantly increasing roll operating costs.

[0004] Current maintenance methods mostly involve disassembly and repair, which requires removing the frame from the site and partially disassembling it, then reassembling it with new parts according to the assembly requirements. However, this takes a long time, about a week for a single frame. For manufacturing companies, the loss of a week's production stoppage is too great.

[0005] Therefore, we propose a maintenance method for the double eccentric frame roll gap adjustment device to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned problems by providing a maintenance method for a double eccentric frame roll gap adjustment device.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a maintenance method for a double eccentric frame roll gap adjustment device, comprising the following steps:

[0008] S1. After cleaning the entire upper surface of the frame, find a fixed point as a reference position and mark it on the oil sling ring to prevent the eccentric sleeve from shifting during disassembly and assembly and thus making it impossible to accurately position.

[0009] S2. Sequentially remove the end caps, side sealing plates, and screw assembly of the roller gap adjustment device;

[0010] S3. Replace with a new eccentric sleeve connecting plate;

[0011] S4. Return the eccentric sleeve to its position before disassembly, slowly insert the adjusted lead screw assembly into the frame, and insert the lead screw assembly lug into the eccentric sleeve connecting plate;

[0012] S5. Install the end caps in place one by one;

[0013] S6. Use a socket wrench to adjust the center distance of the shaft to ensure that the center distance of the shaft can be adjusted to the range specified in the drawing.

[0014] In the above-mentioned maintenance method for a double eccentric frame roll gap adjustment device, the disassembly of the lead screw assembly in step S2 must be meticulous to ensure that the relative position dimensions of the lifting lug and the lead screw remain unchanged during the disassembly and extraction of the lead screw assembly. The relative position dimensions of the lead screw and the lifting lug in the new assembly can be preset with reference to these dimensions.

[0015] In the above-mentioned maintenance method of the double eccentric frame roll gap adjustment device, when replacing the new eccentric sleeve connecting plate in step S3, a level is placed on the side of the connecting plate to adjust the coaxiality of the upper and lower eccentric sleeves.

[0016] In the above-mentioned maintenance method of a double eccentric frame roll gap adjustment device, the equipment used in the dismantling work in S2 includes a mounting plate. The side wall of the mounting plate is connected to two L-shaped external support plates through a bidirectional external support mechanism. The rear side of the mounting plate is also connected to a fixing plate through a pushing mechanism. Each of the four corners of the fixing plate has a through hole, and a rotating shaft is rotatably sleeved in the corresponding through hole through a bearing. One end of the rotating shaft is fixedly connected to a snap-fit ​​cover. A rotating mechanism for driving the rotating shaft to rotate is installed on the fixing plate.

[0017] In the above-mentioned maintenance method of a double eccentric frame roll gap adjustment device, the bidirectional external support mechanism includes two clamping plates symmetrically and fixedly connected to the side wall of the mounting plate. The side wall of the mounting plate is also provided with a first rotating cylinder located between the two clamping plates. Both output ends of the first rotating cylinder are fixedly connected with adjusting screws. One end of the adjusting screw is rotatably connected to the side wall of the clamping plate through a bearing. The adjusting screw has a threaded moving block. One end of the moving block passes through the side wall of the mounting plate through a strip-shaped opening and is fixedly connected to one side of the L-shaped external support plate.

[0018] In the above-mentioned maintenance method of a double eccentric frame roll gap adjustment device, the mounting plate is fixedly connected to the inner wall of the corresponding strip opening with a limiting slide rod, and the side wall of the moving block is provided with a sliding hole that slides and engages with the limiting slide rod.

[0019] In the above-mentioned maintenance method of a double eccentric frame roll gap adjustment device, the propulsion mechanism includes a U-shaped positioning plate fixedly connected to the rear side of the mounting plate. Four rotating screws are symmetrically rotatably connected to the side walls of the mounting plate and the U-shaped positioning plate via bearings. One end of each rotating screw is fixedly connected to a driven bevel gear. A second rotating drum is provided on the rear side of the U-shaped positioning plate. Both ends of the second rotating drum are fixedly connected to a connecting shaft. One end of the connecting shaft is fixedly connected to a driving bevel gear that meshes with the driven bevel gear.

[0020] In the above-mentioned maintenance method of a double eccentric frame roll gap adjustment device, the rotating mechanism includes an operating disc disposed on the rear side of the fixed plate. The output end of the operating disc passes through the side wall of the fixed plate and is fixedly connected to a drive gear. The rear shaft wall of the rotating shaft is fixedly sleeved with a driven gear that meshes with the drive gear.

[0021] In the above-mentioned maintenance method of the double eccentric frame roll gap adjustment device, two bearing seats are symmetrically fixedly connected to the rear side of the U-shaped positioning plate, and the inner wall of the bearing seat is rotatably sleeved on the outside of the connecting shaft through ball bearings.

[0022] Compared with the prior art, the present invention provides a maintenance method for a double eccentric frame roll gap adjustment device, which has the following beneficial effects:

[0023] 1. The maintenance method for this double eccentric frame roll gap adjustment device involves cleaning the entire upper surface of the frame, finding a fixed point as a reference position, and marking it on the oil-slinging ring to prevent the eccentric sleeve from shifting and becoming difficult to position accurately during disassembly and assembly; sequentially removing the end caps, side sealing plates, and lead screw assembly of the roll gap adjustment device; replacing the new eccentric sleeve connecting plate; restoring the eccentric sleeve to its pre-disassembly position, slowly inserting the adjusted lead screw assembly into the frame, and inserting the lead screw assembly lifting lug into the eccentric sleeve connecting plate; sequentially installing the end caps in place, and using a socket wrench to adjust the shaft center distance to ensure that the shaft center distance can be adjusted to the range specified in the drawings. This method allows for partial replacement and maintenance of the seized adjustment device, is less time-consuming, and is more convenient and efficient.

[0024] 2. The maintenance method of this double eccentric frame roll gap adjustment device involves placing two L-shaped outer support plates between the two clamping plates of the eccentric sleeve connecting plate using a mounting plate. Rotating the first rotating drum causes the adjusting screw to rotate. The threaded connection between the adjusting screw and the moving block, along with the guide rod's limiting and guiding effect on the moving block, causes the moving block to move the two L-shaped outer support plates in opposite directions, thus aligning the eccentric sleeve connecting plate. Then, rotating the second rotating drum causes the driving bevel gear to rotate via the connecting shaft. The meshing of the driving and driven bevel gears drives the two rotating screws to rotate synchronously. The threaded connection between the rotating screw and the fixed plate causes the fixed plate to move the rotating shaft and the locking cover, allowing the locking cover to engage with the end of the fixing screw. Finally, activating the operating panel causes the driving gear to rotate. The meshing of the driving and driven gears drives the rotating shaft, which in turn rotates the locking cover, allowing for rapid screw removal. This rapid removal operation ensures efficient use and maintenance.

[0025] In summary, this invention enables partial replacement and repair of jammed adjustment devices, with a shorter operation time and greater convenience. Attached Figure Description

[0026] Figure 1 This is a flowchart of a maintenance method for a double eccentric frame roll gap adjustment device proposed in this invention;

[0027] Figure 2 This is a schematic diagram of the dismantling equipment for a maintenance method of a double eccentric frame roll gap adjustment device proposed in this invention.

[0028] In the diagram: 1. Mounting plate; 2. L-shaped outer support plate; 3. Fixing plate; 4. Rotating shaft; 5. Clip cover; 6. Clip plate; 7. First rotating drum; 8. Adjusting screw; 9. Moving block; 10. Strip opening; 11. Limiting slide rod; 12. U-shaped positioning plate; 13. Rotating screw; 14. Driven bevel gear; 15. Second rotating drum; 16. Connecting shaft; 17. Driving bevel gear; 18. Operating panel; 19. Driving gear; 20. Driven gear. Detailed Implementation

[0029] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0030] Please see Figure 1-2 A maintenance method for a double eccentric frame roll gap adjustment device includes the following steps:

[0031] S1. After cleaning the entire upper surface of the frame, find a fixed point as a reference position and mark it on the oil sling ring to prevent the eccentric sleeve from shifting during disassembly and assembly and thus making it impossible to accurately position.

[0032] S2. Sequentially remove the end caps, side sealing plates, and screw assembly of the roller gap adjustment device;

[0033] S3. Replace with a new eccentric sleeve connecting plate;

[0034] S4. Return the eccentric sleeve to its position before disassembly, slowly insert the adjusted lead screw assembly into the frame, and insert the lead screw assembly lug into the eccentric sleeve connecting plate;

[0035] S5. Install the end caps in place one by one;

[0036] S6. Use a socket wrench to adjust the center distance of the shaft to ensure that the center distance of the shaft can be adjusted to the range specified in the drawing.

[0037] In S2, the disassembly of the lead screw assembly must be done meticulously to ensure that the relative position dimensions of the lifting lug and the lead screw remain unchanged during the disassembly and extraction of the lead screw assembly. The relative position dimensions of the lead screw and the lifting lug in the new assembly can be preset with reference to these dimensions.

[0038] When replacing the eccentric sleeve connecting plate in S3, place a level on the side of the connecting plate and adjust the coaxiality of the upper, lower, left, and right eccentric sleeves.

[0039] The equipment used in the dismantling work in S2 includes a mounting plate 1. The side wall of the mounting plate 1 is connected to two L-shaped external support plates 2 through a two-way external support mechanism. The rear side of the mounting plate 1 is also connected to a fixing plate 3 through a pushing mechanism. Each of the four corners of the fixing plate 3 has a through hole, and a rotating shaft 4 is rotatably sleeved in the corresponding through hole through a bearing. One end of the rotating shaft 4 is fixedly connected to a snap-fit ​​cover 5. A rotating mechanism for driving the rotating shaft 4 to rotate is installed on the fixing plate 3.

[0040] The bidirectional external support mechanism includes two symmetrically fixedly connected clamping plates 6 to the side wall of the mounting plate 1. The side wall of the mounting plate 1 is also provided with a first rotating cylinder 7 located between the two clamping plates 6. Both output ends of the first rotating cylinder 7 are fixedly connected with adjusting screws 8. One end of the adjusting screw 8 is rotatably connected to the side wall of the clamping plate 6 through a bearing. The adjusting screw 8 has a threaded adjustment of a moving block 9. One end of the moving block 9 passes through the side wall of the mounting plate 1 through a strip-shaped opening 10 and is fixedly connected to one side of the L-shaped external support plate 2.

[0041] Mounting plate 1 is fixedly connected to the inner wall of the corresponding strip opening 10 with a limiting slide rod 11, and the side wall of moving block 9 is provided with a sliding hole that slides and engages with the limiting slide rod 11.

[0042] The propulsion mechanism includes a U-shaped positioning plate 12 fixedly connected to the rear side of the mounting plate 1. Four rotating screws 13 are symmetrically connected to the side walls of the mounting plate 1 and the U-shaped positioning plate 12 via bearings. One end of the rotating screw 13 is fixedly connected to a driven bevel gear 14. A second rotating drum 15 is provided on the rear side of the U-shaped positioning plate 12. Both ends of the second rotating drum 15 are fixedly connected to a connecting shaft 16. One end of the connecting shaft 16 is fixedly connected to a driving bevel gear 17 that meshes with the driven bevel gear 14.

[0043] The rotating mechanism includes an operating disc 18 located on the rear side of the fixed plate 3. The output end of the operating disc 18 passes through the side wall of the fixed plate 3 and is fixedly connected to a drive gear 19. The rear shaft wall of the rotating shaft 4 is fixedly sleeved with a driven gear 20 that meshes with the drive gear 19.

[0044] Two bearing seats are symmetrically fixedly connected to the rear side of the U-shaped positioning plate 12, and the inner wall of the bearing seats is rotatably sleeved on the outside of the connecting shaft 16 by ball bearings.

[0045] The operating principle of this invention is described as follows: After cleaning the entire upper surface of the frame, a fixed point is found as a reference position, and a mark is made on the oil-slinging ring to prevent the eccentric sleeve from shifting and becoming inaccurately positioned during disassembly and assembly; the end caps, side sealing plates, and lead screw assembly of the roll gap adjustment device are removed in sequence; a new eccentric sleeve connecting plate is replaced; the eccentric sleeve position is restored to the position before disassembly, and the adjusted lead screw assembly is slowly inserted into the frame, with the lead screw assembly lifting lug inserted into the eccentric sleeve connecting plate; the end caps are installed in sequence, and the shaft center distance is adjusted using a socket wrench to ensure that the shaft center distance can be adjusted to the range specified in the drawing. This allows for partial replacement and maintenance of the seized adjustment device, which is faster and more convenient with less time consumption. Through the provided mounting plate 1, the two L-shaped outer support plates 2 are first placed between the two clamping plates of the eccentric sleeve connecting plate, and the first rotating drum 7 is rotated, which drives the first rotating drum 7 to move the rollers. The adjustment screw 8 is rotated, and the threaded connection between the adjustment screw 8 and the moving block 9, along with the guide rod's limiting and guiding action on the moving block 9, causes the moving block 9 to drive the two L-shaped outer support plates 2 to move in opposite directions, thus aligning the eccentric sleeve connecting plate. Then, the second rotating drum 15 is rotated, and the second rotating drum 15 drives the driving bevel gear 17 to rotate via the connecting shaft 16. The meshing action of the driving bevel gear 17 and the driven bevel gear 14 drives the two rotating screws 13 to rotate synchronously. The threaded connection between the rotating screw 13 and the fixing plate 3 causes the fixing plate 3 to drive the rotating shaft 4 and the snap-fit ​​cover 5 to move, so that the snap-fit ​​cover 5 is snapped onto the end of the fixing screw. Then, the operation panel 18 is activated, and the operation panel 18 drives the driving gear 19 to rotate. The meshing action of the driving gear 19 and the driven gear 20 drives the rotating shaft 4 to rotate the snap-fit ​​cover 5, allowing for quick removal of the screw. This enables rapid removal operations and ensures efficient use and maintenance.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A maintenance method for a double eccentric frame roll gap adjustment device, characterized in that: Includes the following steps: S1. After cleaning the entire upper surface of the frame, select a fixed position on the frame opposite to the oil slinger ring as the reference position, and mark it on the oil slinger ring to prevent the eccentric sleeve from shifting during disassembly and assembly and thus making it impossible to accurately position. S2. Sequentially remove the end caps, side sealing plates, and screw assembly of the roller gap adjustment device; S3. Replace with a new eccentric sleeve connecting plate; S4. Return the eccentric sleeve to its position before disassembly, slowly insert the adjusted lead screw assembly into the frame, and insert the lead screw assembly lug into the eccentric sleeve connecting plate; S5. Install the end caps in place one by one; S6. Use a socket wrench to adjust the center distance between the upper and lower roller shafts to ensure that the center distance between the upper and lower roller shafts can be adjusted to the range specified in the drawing.

2. The maintenance method for a double eccentric frame roll gap adjustment device according to claim 1, characterized in that: In step S2, when removing the lead screw assembly, the relative position dimensions of the lifting lug and the lead screw remain unchanged; when installing the new lead screw assembly, the relative position dimensions of the lead screw and the lifting lug are preset with reference to the relative position dimensions of the lifting lug and the lead screw in the original lead screw assembly measured before removal.

3. The maintenance method for a double eccentric frame roll gap adjustment device according to claim 1, characterized in that: When replacing the eccentric sleeve connecting plate in S3, place a level on the side of the eccentric sleeve connecting plate and adjust the coaxiality of the upper and lower eccentric sleeves and the left and right eccentric sleeves.

4. A maintenance method for a double eccentric frame roll gap adjustment device according to claim 1, characterized in that: The equipment used in the dismantling work in S2 includes a mounting plate (1). The side wall of the mounting plate (1) is connected to two L-shaped external support plates (2) through a two-way external support mechanism. The rear side of the mounting plate (1) is also connected to a fixing plate (3) through a pushing mechanism. The fixing plate (3) has through holes at all four corners, and a rotating shaft (4) is rotatably sleeved in the corresponding through holes through a bearing. One end of the rotating shaft (4) is fixedly connected to a snap-fit ​​cover (5). A rotating mechanism for driving the rotating shaft (4) to rotate is installed on the fixing plate (3).

5. A maintenance method for a double eccentric frame roll gap adjustment device according to claim 4, characterized in that: The bidirectional external support mechanism includes two symmetrically fixedly connected clamping plates (6) on the side wall of the mounting plate (1). The side wall of the mounting plate (1) is also provided with a first rotating cylinder (7) located between the two clamping plates (6). Both output ends of the first rotating cylinder (7) are fixedly connected with adjusting screws (8). One end of the adjusting screw (8) is rotatably connected to the side wall of the clamping plate (6) through a bearing. The adjusting screw (8) has a moving block (9) threaded on its rod wall. One end of the moving block (9) passes through the side wall of the mounting plate (1) through a strip opening (10) and is fixedly connected to one side of the L-shaped external support plate (2).

6. A maintenance method for a double eccentric frame roll gap adjustment device according to claim 5, characterized in that: The mounting plate (1) is fixedly connected to the inner wall of the corresponding strip opening (10) with a limiting slide rod (11), and the side wall of the moving block (9) is provided with a sliding hole that slides and engages with the limiting slide rod (11).

7. A maintenance method for a double eccentric frame roll gap adjustment device according to claim 4, characterized in that: The propulsion mechanism includes a U-shaped positioning plate (12) fixedly connected to the rear side of the mounting plate (1). Four rotating screws (13) are symmetrically connected to the side walls of the mounting plate (1) and the U-shaped positioning plate (12) via bearings. One end of the rotating screw (13) is fixedly connected to a driven bevel gear (14). A second rotating drum (15) is provided on the rear side of the U-shaped positioning plate (12). Both ends of the second rotating drum (15) are fixedly connected to a connecting shaft (16). One end of the connecting shaft (16) is fixedly connected to a driving bevel gear (17) that meshes with the driven bevel gear (14).

8. A maintenance method for a double eccentric frame roll gap adjustment device according to claim 4, characterized in that: The rotating mechanism includes an operating disc (18) located on the rear side of the fixed plate (3). The output end of the operating disc (18) passes through the side wall of the fixed plate (3) and is fixedly connected to a drive gear (19). The rear shaft wall of the rotating shaft (4) is fixedly sleeved with a driven gear (20) that meshes with the drive gear (19).

9. A maintenance method for a double eccentric frame roll gap adjustment device according to claim 7, characterized in that: The rear side of the U-shaped positioning plate (12) is symmetrically fixedly connected to two bearing seats, and the inner wall of the bearing seats is rotated and sleeved on the outside of the connecting shaft (16) by ball bearings.

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