A worn supporting roller bushing repairing device and a repairing method thereof

Abstract

This invention relates to a repair device and method for used support roller sleeves, belonging to the technical field of rolling mill support roller repair equipment in the metallurgical industry. The technical solution includes a base cabinet (1), a moving block (2), a support rod (5), a bearing platform (6), a driver (23), a grinding mechanism (31), and a mating roller (32). The base cabinet (1) contains the moving block (2). The bearing platform (6) is fixed to the moving block (2) by the support rod (5). Above the bearing platform (6) is a driver (23) that mates with the support roller (7) and the roller sleeve (9). On one side of the bearing platform (6) is a grinding mechanism (31) that mates with the support roller (7) and the roller sleeve (9). On the other side of the bearing platform (6) is a mating roller (32) that mates with the support roller (7) and the roller sleeve (9). The beneficial effects of this invention are: it enables the support roller and the roller sleeve to fully fit together, effectively eliminating air gaps between the mating surfaces and ensuring the repair effect.

Description

Technical Field

[0001] This invention relates to a waste support roll bushing repair equipment and repair method, belonging to the technical field of rolling mill support roll repair equipment in the metallurgical industry. Background Technology

[0002] Support rolls play an extremely important role in rolling production. In recent years, although the quality and hardness of support rolls have been getting better and better, as a consumable part, support rolls still suffer from severe wear after long-term use. A large number of waste support rolls are generated every year. If waste support rolls are not recycled and are directly discarded, it will undoubtedly cause huge waste of resources and increase replacement costs.

[0003] In existing technologies, the sleeve method is generally used to repair used support rollers: when the diameter of the used support roller is reduced to the point of being unusable, or the surface heat treatment hardness is too low to be used, in order to reuse it, the roller sleeve is sleeved on the outside of the roller core to form a sleeved support roller, thereby realizing the reuse of the used support roller.

[0004] In the actual process of bushing repair, the size and sufficiency of the contact area between the roller sleeve and the support roller directly affect the repair effect. In existing technologies, the support roller and roller sleeve are generally assembled using heat fitting to achieve an interference fit. However, because the machining accuracy of the outer cylindrical surface of the support roller and the inner surface of the roller sleeve are difficult to achieve perfectly, some air gaps (tiny gaps) still exist between the support roller and the roller sleeve after heat fitting. This prevents them from fully adhering to each other, thus affecting the repair effect on the support roller.

[0005] Based on this, we propose a device and method for repairing waste support roller bushings. Summary of the Invention

[0006] The purpose of this invention is to provide a waste support roller sleeve repair device and repair method, which can make the support roller and the sleeve fit together fully, improve the repair effect of the support roller, and solve the problems existing in the background art.

[0007] The technical solution of this invention is:

[0008] A waste support roller sleeve repair device includes a base cabinet, a movable block, a support rod, a support platform, a driver, a grinding mechanism, and a matching roller. The movable block is located inside the base cabinet, and the support platform is fixed to the movable block by the support rod. The support platform is used to support the support roller and the sleeve. A driver that mates with the support roller and the sleeve is located above the support platform. A grinding mechanism that mates with the support roller and the sleeve is located on one side of the support platform, and a matching roller that mates with the support roller and the sleeve is located on the other side of the support platform.

[0009] The bearing platform has a shaft groove at its center that mates with the journal of the support roller, and a support platform that moves up and down is provided below the bearing platform to support the journal at the lower end of the support roller.

[0010] The support platform is provided with a lifting plate underneath, which is slidably mounted on the horizontal plate. The two ends of the horizontal plate are respectively fixed to the two side plates of the base cabinet.

[0011] The middle part of the horizontal plate is concave.

[0012] The part of the lifting plate that contacts the horizontal plate is arc-shaped.

[0013] The support platform is fixed on the support rod, the support rod is fixed on the movable plate, and the movable block has an inner cavity that cooperates with the movable plate. The movable plate is movably disposed in the inner cavity of the movable block.

[0014] The moving plate is provided with a spring on the side away from the mating roller.

[0015] The movable block inside the base cabinet is threaded onto a lead screw, which is driven by a motor.

[0016] The driver is equipped with a rotatable rotating sleeve, which engages with the journal at the upper end of the support roller.

[0017] A method for repairing used support roller bushings, using the aforementioned equipment for repairing used support roller bushings, and operating according to the following steps:

[0018] S1. Perform flaw detection and precision machining on the support rollers;

[0019] S2. Make the roller sleeve, heat it, and place it on the support platform;

[0020] S3. Assemble the support rollers coaxially into the roller sleeve from top to bottom and cool them;

[0021] S4. Control the support roller to move to the left, and use the grinding mechanism to remove the excess material at the top of the roller sleeve;

[0022] S5. Control the support roller to move to the right so that it is adjacent to the mating roller, and perform aluminum strip cold rolling between the support roller and the mating roller;

[0023] S6. Control the support roller to move to the left, and grind the surface of the roller sleeve through the grinding mechanism;

[0024] S7. Repeat steps S5 and S6 until the repair of the support roller and roller sleeve is completed.

[0025] In step S5, an aluminum strip is provided between the support roller and the mating roller.

[0026] The beneficial effects of this invention are:

[0027] (1) Aluminum strip is cold rolled between the support roll and the mating roll. By utilizing the continuous action of the alternating rolling force during the cold rolling process, the fit between the support roll and the roll sleeve can be made tighter, thereby effectively eliminating the air gap between the mating surfaces and ensuring the repair effect.

[0028] (2) The roller sleeve surface is ground by the grinding mechanism to eliminate the surface unevenness generated by the roller sleeve during the cold rolling process and ensure the accuracy of the outer surface of the roller sleeve. Attached Figure Description

[0029] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a front cross-sectional view of the overall structure of the present invention;

[0031] Figure 3 This is a cross-sectional view of the movable block portion of the present invention;

[0032] Figure 4 This is a cross-sectional view of the insert portion of the present invention;

[0033] Figure 5 This is an enlarged schematic diagram of the driver portion of the present invention;

[0034] Figure 6 This is a schematic diagram of the bushing grinding state of the present invention;

[0035] Figure 7 This is a schematic diagram of the cold-rolled state of the bushing of the present invention.

[0036] In the diagram: 1. Base cabinet; 2. Moving block; 3. Lead screw; 4. Motor; 5. Support rod; 6. Bearing platform; 7. Support roller; 8. Journal; 9. Roller sleeve; 10. Shaft groove; 11. Inner cavity; 12. Moving plate; 13. Spring; 14. Support platform; 15. Mating groove; 16. Lifting plate; 17. Horizontal plate; 18. Center straight surface; 19. Sloping surface; 20. Side straight surface; 21. Guide opening; 22. Connecting shaft; 23. Driver; 24. Rotating sleeve; 25. Baffle; 26. Stud; 27. Wing plate; 28. Threaded groove; 29. ​​Nut; 30. Side plate; 31. Grinding mechanism; 32. Mating roller. Detailed Implementation

[0037] The invention will be further described below with reference to the accompanying drawings and examples.

[0038] See attached document Figure 1-7A waste support roller sleeve repair device includes a base cabinet 1, a movable block 2, a support rod 5, a support platform 6, a driver 23, a grinding mechanism 31, and a mating roller 32. The movable block 2 is provided inside the base cabinet 1. The support platform 6 is fixed on the movable block 2 by the support rod 5. The support platform 6 is used to support the support roller 7 and the roller sleeve 9. The driver 23 that mates with the support roller 7 and the roller sleeve 9 is provided above the support platform 6. The grinding mechanism 31 that mates with the support roller 7 and the roller sleeve 9 is provided on one side of the support platform 6. The mating roller 32 that mates with the support roller 7 and the roller sleeve 9 is provided on the other side of the support platform 6.

[0039] In this embodiment, please refer to Figures 1-7 The waste support roller 7 has journals 8 at both the upper and lower ends. The roller sleeve 9 and the support roller 7 are assembled by heat fitting. After the support roller 7 is inspected and precision machined, the heated roller sleeve 9 is fitted onto the support roller 7.

[0040] like Figure 2 As shown, the support platform 6 is used to support the support roller 7 and the roller sleeve 9. A shaft groove 10 is provided at the center of the support platform 6 for the journal 8 to pass through, as shown... Figure 4 As shown, a guide opening 21 is formed on the inner wall of the top of the roller sleeve 9 to guide the support roller 7 into the roller sleeve 9.

[0041] After the roller sleeve 9 is heated, it is placed on the support platform 6. The support roller 7 is hoisted and coaxially assembled into the roller sleeve 9 from top to bottom. Through the guide opening 21 on the inner wall of the top of the roller sleeve 9, the support roller 7 can smoothly enter the roller sleeve 9 along the guide opening 21. This not only ensures the assembly accuracy but also simplifies the assembly operation. It eliminates the need for multiple people to accurately position the support roller 7 and allows for a slight relaxation of the positioning accuracy. After assembly, the bottom surfaces of the roller sleeve 9 and the support roller 7 are in contact with the support platform 6 and are kept on the same plane. No secondary processing of the end face is required. As for the part of the roller sleeve 9 that protrudes from the top edge of the support roller 7, it can be machined off.

[0042] like Figure 2 As shown, the bottom of the support platform 6 is connected to the movable block 2 that can move left and right via the support rod 5. The support platform 14 is also movably mounted below the support platform 6. When the support platform 14 moves upward, it can drive the support roller 7 and the roller sleeve 9 to move upward via the bottom journal 8 of the support roller 7. In this way, when the support platform 14 moves upward, it can drive the support roller 7 and the roller sleeve 9 to move upward, so that the bottom end face of the support roller 7 and the roller sleeve 9 is separated from the support platform 6. The purpose of this is to facilitate the rotation of the support roller 7.

[0043] like Figure 1 As shown, a grinding mechanism 31 is provided on one side of the support roller 7, and a mating roller 32 is provided on the other side;

[0044] After the support roller 7 and the roller sleeve 9 are assembled, the support roller 7 is moved to the right so that it is adjacent to the mating roller 32. At this time, aluminum strip cold rolling is performed between the support roller 7 and the mating roller 32. Figure 7 As shown, by utilizing the continuous action of alternating rolling force during cold rolling, the fit between the support roll 7 and the roll sleeve 9 can be made tighter, effectively eliminating air gaps between the bonding surfaces and ensuring the repair effect.

[0045] After the aluminum strip is cold rolled between the support roller 7 and the mating roller 32, and then the support roller 7 is moved to the left, the surface of the roller sleeve 9 can be re-grinded by the grinding mechanism 31. Figure 6 As shown, this eliminates surface irregularities in the roll sleeve 9 during the cold rolling process, ensuring the accuracy of the outer surface of the roll sleeve 9.

[0046] Repeating this process multiple times can significantly eliminate the air gap (tiny gap) between the support roller 7 and the roller sleeve 9, allowing them to fit together fully and thus ensuring the repair effect on the support roller 7.

[0047] In this embodiment, the grinding mechanism 31 can be a grinding device in the prior art, such as a grinding wheel; the matching roller 3 can also be a pressing roller in the prior art, as long as it can rotate synchronously with the support roller 7.

[0048] Since the bottom of the support platform 6 is connected to the moving block 2 via the support rod 5, the left and right movement of the support platform 6 can be driven by controlling the left and right movement of the moving block 2.

[0049] In this embodiment, as Figure 2 As shown, the movable block 2 is threadedly connected to the lead screw 3. The lead screw 3 is rotatably installed inside the base cabinet 1 and is driven by the motor 4. The operation of the motor 4 drives the lead screw 3 at the end of its output shaft to rotate. The rotation of the lead screw 3 drives the movable block 2 threadedly connected to its outer wall to move left and right. The left and right movement of the movable block 2, through the support rod 5, can drive the bearing platform 6 to move left and right, and adjust the position of the support roller 7.

[0050] When the support roller 7 and the roller sleeve 9 are assembled, the bottom surfaces of the support roller 7 and the roller sleeve 9 should be in contact with the bearing platform 6. This makes it easier to place the roller sleeve 9 and also ensures that the bottom surfaces of the support roller 7 and the roller sleeve 9 are on the same plane after assembly.

[0051] The support roller 7 needs to rotate during grinding and cold rolling. Therefore, when the support roller 7 moves to the left or right, its bottom end face cannot be in contact with the support platform 6. Therefore, in this embodiment, a support platform 14 is provided, which can support the support roller 7 and the roller sleeve 9 through the journal 8 at the bottom of the support roller 7 to facilitate the rotation of the support roller 7.

[0052] The support platform 14 is provided with a mating groove 15 for mating with the journal 8 at the bottom of the support roller 7 to allow it to rotate. Of course, bearings can also be provided as needed.

[0053] Setting up a separate lifting drive mechanism for the platform 14 would obviously be too costly. After repeated experiments, we determined the following structure to control the lifting of the platform 14:

[0054] like Figure 2 As shown, the support platform 14 is slidably disposed between adjacent support rods 5. A lifting plate 16 is fixedly installed at the bottom of the support platform 14. The bottom end of the lifting plate 16 is an arc-shaped surface and is slidably disposed on the horizontal plate 17. The horizontal plate 17 is fixedly installed between two side plates 30. The two side plates 30 are respectively installed on both sides of the base cabinet 1.

[0055] The top surface of the horizontal plate 17 is recessed in the middle, forming a central straight surface 18, and side straight surfaces 20 are formed on both sides. The central straight surface 18 and the side straight surfaces 20 are connected by a ramp surface 19. In this way, the support platform 14 and the lifting plate 16 are supported by the horizontal plate 17. When the bottom end of the lifting plate 16 is on the central straight surface 18, the support platform 14 and the lifting plate 16 are in the lowest position. At this time, the bottom end surfaces of the support roller 7 and the roller sleeve 9 are in contact with the bearing platform 6.

[0056] When the support platform 6 moves to the left or right, the lifting plate 16 and the support platform 14 will gradually rise under the action of the slope surface 19, thereby lifting the support roller 7 and the roller sleeve 9, so that the bottom end surface of the support roller 7 and the roller sleeve 9 is separated from the top surface of the support platform 6.

[0057] In this way, when the support platform 6 is in the middle position, the bottom surfaces of the support roller 7 and the roller sleeve 9 are in contact with the support platform 6, which facilitates the assembly of the support roller 7 and the roller sleeve 9; when the support platform 6 is in the two sides position, the bottom surfaces of the support roller 7 and the roller sleeve 9 are detached from the support platform 6, which facilitates the rotation of the support roller 7 and the roller sleeve 9.

[0058] The rotation of the support roller 7 also requires driving. In this embodiment, the following driving structure is provided, such as... Figure 5 As shown, the top surface of the support platform 14 is detachably connected to the driver 23 via the connecting shaft 22. The driver 23 has a rotatable rotating sleeve 24, which is movably locked onto the journal 8 at the top of the support roller 7. After the support roller 7 and the roller sleeve 9 are assembled, the driver 23 is installed on the connecting shaft 22, and the rotating sleeve 24 of the driver 23 is locked onto the journal 8 at the top of the support roller 7, so that the rotation of the support roller 7 can be driven by the driver 23. As for the specific structure of the driver 23, those skilled in the art can set and select it according to actual needs, such as driving the rotation of the rotating sleeve 24 by a motor.

[0059] Furthermore, such as Figure 5As shown, a baffle 25 is fixedly installed on the top of the connecting shaft 22, and a stud 26 is fixedly installed on the top of the baffle 25. A wing plate 27 is fixedly installed on the side of the driver 23. A threaded groove 28 coupled with the stud 26 is opened on the wing plate 27. After the stud 26 passes through the threaded groove 28, a nut 29 is threadedly connected. In this way, the position of the driver 23 can be positioned by fixing the stud 26 through the threaded groove 28, and disassembly is also very convenient.

[0060] In this embodiment, as Figure 3 As shown, a movable plate 12 is fixedly connected to the bottom of the support platform 6 by a support rod 5. The movable plate 12 is movably disposed in the inner cavity 11, which is opened inside the movable block 2. A spring 13 is also fixedly disposed between the left side of the movable plate 12 and the inner wall of the inner cavity 11.

[0061] The moving block 2 moves to the right, causing the support roller 7 to move to the right, making it adjacent to the mating roller 32. At this time, aluminum strip cold rolling can be performed between the support roller 7 and the mating roller 32. During the aluminum strip cold rolling, the moving block 2 can be moved to the right a little further. Since there is an aluminum strip between the support roller 7 and the mating roller 32, the support roller 7 can no longer move. Instead, it will compress the spring 13 through the moving plate 12. The compressed spring 13 can provide a preload force towards the mating roller 32 for the moving plate 12, support rod 5, bearing platform 6 and support roller 7. Using this preload force, the support roller 7 can squeeze the aluminum strip more tightly, and it can easily adapt even if the track becomes thinner.

[0062] This embodiment also provides a method for repairing used support roller bushings, which specifically includes the following steps:

[0063] Step 1: Perform flaw detection and precision machining on support roller 7;

[0064] Step 2: Make roller sleeve 9, heat it and place it on bearing platform 6;

[0065] Step 3: Assemble the support roller 7 coaxially into the roller sleeve 9 from top to bottom, and then cool it.

[0066] Step 4: Control the support roller 7 to move to the left, and use the grinding mechanism 31 to remove the excess material at the top of the roller sleeve 9;

[0067] Step 5: Control the support roller 7 to move to the right so that it is adjacent to the mating roller 32, and perform aluminum strip cold rolling between the support roller 7 and the mating roller 32;

[0068] Step 6: Control the support roller 7 to move to the left, and use the grinding mechanism 31 to grind the surface of the roller sleeve 9;

[0069] Step 7, repeating steps 5 and 6;

[0070] Step 8: Obtain the repaired support roller 7.

[0071] During assembly in step three, the support roller 7 is located in the middle of the horizontal plate 17. At this time, the bottom surfaces of the roller sleeve 9 and the support roller 7 are in contact with the support platform 6. When the support roller 7 moves to the left or right, the bottom surfaces of the roller sleeve 9 and the support roller 7 move up and detach from the top surface of the support platform 6.

Claims

1. A device for repairing worn support roller bushings, characterized in that: It includes a base cabinet (1), a movable block (2), a support rod (5), a support platform (6), a driver (23), a grinding mechanism (31), and a mating roller (32). The base cabinet (1) is equipped with a movable block (2). The support platform (6) is fixed on the movable block (2) by the support rod (5). The support platform (6) is used to support the support roller (7) and the roller sleeve (9). The driver (23) that mates with the support roller (7) and the roller sleeve (9) is provided above the support platform (6). The grinding mechanism (31) that mates with the support roller (7) and the roller sleeve (9) is provided on one side of the support platform (6). The mating roller (32) that mates with the support roller (7) and the roller sleeve (9) is provided on the other side of the support platform (6). The bearing platform (6) has a shaft groove (10) at its center that mates with the journal (8) of the support roller (7). Below the bearing platform (6) is a support platform (14) that moves up and down, which supports the journal (8) at the lower end of the support roller (7). The support platform (14) is provided with a lifting plate (16) underneath. The lifting plate (16) is slidably mounted on the horizontal plate (17). The two ends of the horizontal plate (17) are respectively fixed on the two side plates (30) of the base cabinet (1). The middle part of the horizontal plate (17) is concave, and the part of the lifting plate (16) that contacts the horizontal plate (17) is arc-shaped.

2. The waste support roller bushing repair equipment according to claim 1, characterized in that: The support platform (6) is fixed on the support rod (5), the support rod (5) is fixed on the moving plate (12), and the moving block (2) has an inner cavity (11) that cooperates with the moving plate (12). The moving plate (12) is movably arranged in the inner cavity (11) of the moving block (2).

3. The waste support roller bushing repair equipment according to claim 2, characterized in that: The movable plate (12) is provided with a spring (13) on the side away from the mating roller (32).

4. A waste support roller bushing repair device according to claim 1 or 2, characterized in that: The movable block (2) inside the cabinet (1) is threadedly connected to the lead screw (3), which is driven by the motor (4).

5. The waste support roller bushing repair equipment according to claim 1, characterized in that: The driver (23) is provided with a rotatable rotating sleeve (24), which cooperates with the journal (8) at the upper end of the support roller (7).

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