A roll changing device and a roll changing method for a rolling mill

Abstract

This invention relates to the field of rolling mill technology and discloses a rolling mill roll changing device, including a roll changing carriage and a fixed frame fixed on the rolling mill. The bottom of the roll changing carriage has a sliding groove, and a sliding plate is slidably connected within the groove. Two first springs are fixedly connected to one side of the sliding plate, and the first springs are fixed to the sliding groove. This invention also proposes a rolling mill roll changing method, including the following steps: S1: Disassemble the rolling mill, remove the rolling mill cover and bearing cooling water pipes, then lift all protective plates and open the front and rear gantry frames. This invention not only enables the roll changing carriage to be positioned and connected to the rolling mill without requiring multiple adjustments to the position of the roll changing carriage, thus improving the efficiency of roll disassembly, but also prevents the roll changing carriage from detaching from the rolling mill, improving the stability of the connection between the roll changing carriage and the rolling mill. Furthermore, it enables efficient, stable, and rapid fully automatic roll changing.

Description

Technical Field

[0001] This invention relates to the field of rolling mill technology, specifically to a rolling mill roll changing device and a rolling mill roll changing method. Background Technology

[0002] After a long period of use, the rolls of the rolling mill will be maintained and inspected. Unqualified rolls will be replaced, and a special roll changing device will be used for the replacement operation.

[0003] A search revealed that CN214441852U discloses a roll changing device for a multi-roll mill. This device features a stable and reasonable structure, eliminates the need for manual fixing of multi-stage hydraulic cylinders to the rolls to be replaced and subsequent dismantling, thus reducing labor costs and replacement time. It is also more convenient and simple to use, effectively saving manpower. However, during dismantling, the vehicle body needs to be positioned relative to the mill to facilitate roll replacement. It lacks a mechanism for directly positioning the vehicle body, requiring multiple adjustments to complete the positioning, resulting in low roll dismantling efficiency. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a roll changing device and method for a rolling mill, mainly to solve the problem of low roll disassembly efficiency caused by the lack of a mechanism for directly positioning the rolling mill body, which requires multiple adjustments to position the rolling mill body.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A roll changing device for a rolling mill includes a roll changing carriage and a fixed frame fixed to the rolling mill. The bottom of the roll changing carriage has a sliding groove, within which a sliding plate is slidably connected. Two first springs are fixedly connected to one side of the sliding plate and are fixed to the sliding groove. One side of the fixed frame has two protrusions, with the sliding plate positioned between the two protrusions. A fixed post is fixedly connected to one side of the roll changing carriage. Two elastic clamps for holding the fixed post are fixedly connected to one side of the fixed frame. Two insertion posts and two positioning plates are fixedly connected to one side of the roll changing carriage. Two insertion holes are provided on one side of each of the two protrusions, and the insertion posts are inserted into the insertion holes. Two positioning grooves are provided on the top of the fixed frame, and the positioning plates are inserted into the positioning grooves. One side of the fixed frame has a fixing assembly for auxiliary fixing of the fixing posts, positioning plates, and insertion posts. One side of the roll changing carriage has a disassembly assembly for detaching the roll changing carriage from the fixed frame.

[0009] Furthermore, the fixing assembly includes two first fixing blocks and two second fixing blocks, both of which are fixedly connected to one side of the fixing frame. One side of the fixing frame is provided with two first connecting rods and two second connecting rods. Each of the two first connecting rods has a second guide groove on one side, and the two first fixing blocks are respectively located within and slidably connected to the two guide grooves. Each of the two second connecting rods has a first guide groove on one side, and the two second fixing blocks are respectively located within and slidably connected to the two first guide grooves. A third spring is fixedly connected to one side of each of the two second fixing blocks, and the third spring is fixed to the first guide groove. Adjacent first fixing blocks and second fixing blocks... A fixed rod is fixedly connected between the first connecting rod and the second connecting rod. Two elastic plates are fixedly connected between adjacent first connecting rods and second connecting rods. A clamping plate for holding the fixed post is fixedly connected to one adjacent end of each of the two second connecting rods. A clearance groove connected to the insertion hole is opened at the bottom of each of the two positioning grooves. The two first connecting rods extend into the two clearance grooves respectively. A first locking block is fixedly connected to the bottom of each of the two first connecting rods at the position located in the clearance groove. A second locking groove is opened on one side of each of the two insertion posts, and the first locking block engages with the second locking groove. A second locking block is fixedly connected to the top of each of the two first connecting rods. A first locking groove is opened at the bottom of each of the two positioning plates, and the second locking block engages with the first locking groove.

[0010] Based on the aforementioned solution, the disassembly assembly includes a sliding hole, which is opened inside the roll changing car body and extends through the roll changing car body. A U-shaped frame is provided inside the sliding hole and passes through the roll changing car body. A fixing plate is fixedly connected to one side of each of the two first connecting rods. Two inclined surfaces are provided at the bottom of the U-shaped frame. Two wedge-shaped rods are slidably connected inside the sliding hole. A support assembly for supporting the U-shaped frame is provided inside the roll changing car body.

[0011] As a further embodiment of the present invention, the support component includes a U-shaped groove, which is formed in the roll changing car body and is connected to a sliding hole. Two movable grooves are formed at the bottom of the U-shaped groove, and an L-shaped rod is slidably connected in each of the two movable grooves. A second spring is fixedly connected to one side of each of the two L-shaped rods, and the second spring is fixed to the roll changing car body.

[0012] This invention also proposes a roll changing method for a rolling mill, comprising the following steps:

[0013] S1: Disassemble the rolling mill, remove the rolling mill cover and bearing seat cooling water pipes, then lift away all the protective plates and open the front and rear gantry frames;

[0014] S2: Roller changing car setting, adjust the gap between the guide wheel of the movable cover plate and the liner plates on both sides of the guide wheel, set the roller changing car push waiting position on the fixed platform, and set the roller changing car pull-out lower working roller position, roller changing car upper working roller limit position and roller changing car lower working roller limit position on the movable cover plate.

[0015] S3: Roll changing car positioning connection. Insert the slide plate on the roll changing car body into the two protrusions on the fixed frame, and then push the roll changing car body to move. At this time, the fixed frame will push the slide plate into the slide groove, and the slide plate will squeeze the first spring. At the same time, the insert on the roll changing car body will be inserted into the insertion hole on the fixed frame, and the positioning plate will be inserted into the positioning groove. The fixed column will deform by squeezing the elastic bracket through its own arc surface. When the insert is fully inserted into the insertion hole and the positioning plate is fully inserted into the positioning groove, the elastic bracket will clamp the fixed column through its own elasticity, and the fixing component will provide auxiliary fixation for the fixed column, the positioning plate and the insert.

[0016] S4: Roll changing. The roll changing trolley moves from the roll changing trolley push-roll waiting position to the roll changing trolley pull-out lower work roll position, and then moves to the roll changing trolley lower work roll loading limit position. The roll changing trolley hooks the lower work roll to be replaced and pulls the lower work roll to be replaced and the upper work roll to be replaced toward the roll changing trolley push-roll waiting position until the lower work roll to be replaced and the upper work roll to be replaced reach the transverse platform. The roll changing trolley disengages from the lower work roll to be replaced, the transverse platform moves, and the lower work roll to be installed on the transverse platform reaches the roll loading position. The roll changing trolley pushes the lower work roll to be installed and the upper work roll to be installed until the roll changing trolley reaches the roll changing trolley upper work roll loading limit position and the upper work roll to be installed is installed. The roll changing trolley reaches the roll changing trolley lower work roll loading limit position and disengages from the lower work roll to be installed and the lower work roll to be installed is installed.

[0017] S5: Roll mill installation. After the roll change is completed, install the cooling water pipes, retract the front and rear gantry frames, adjust the inlet and outlet, install the mill cover, adjust the roll gap, and cover the guard plate.

[0018] Furthermore, after the disassembly of the rolling mill is completed, it is necessary to clean the iron oxide scale and debris on the rolling mill.

[0019] Based on the aforementioned scheme, the movement of the roll changing trolley from the roll changing trolley push-roll waiting position to the roll changing trolley pull-out lower work roll position, and then to the roll changing trolley loading lower work roll limit position includes the following steps: after the roll changing trolley moves from the roll changing trolley push-roll waiting position to the roll changing trolley pull-out lower work roll position, the rolling mill performs work roll changing preparation work; when the roll changing trolley moves to the roll changing trolley loading lower work roll limit position, the lower work roll connecting shaft of the rolling mill is clamped and closed, and the lower work roll clamping plate of the rolling mill is opened.

[0020] (III) Beneficial Effects

[0021] Compared with the prior art, the present invention provides a roll changing device and a roll changing method for a rolling mill, which has the following beneficial effects:

[0022] 1. By using the joint of the insert post, insert hole, positioning plate and positioning groove, the insert post on the roll changing car body is inserted into the insert hole on the fixed frame, and the positioning plate is put into the positioning groove on the fixed frame. This allows the roll changing car body to be positioned and connected to the rolling mill. It eliminates the need to adjust the position of the roll changing car body multiple times, thus improving the efficiency of roll disassembly.

[0023] 2. By using the sliding plate, when connecting the roll changing car body to the fixed frame on the rolling mill, the sliding plate on the roll changing car body is inserted between the two protrusions, which facilitates the positioning of the connection between the roll changing car body and the rolling mill, and improves the convenience of connecting the roll changing car body and the rolling mill.

[0024] 3. By setting up the fixing components, the insertion post is inserted into the insertion hole, and the positioning plate is inserted into the positioning groove. The fixing components can fix the position of the insertion post and the positioning plate to prevent the roll changing car body from detaching from the rolling mill, thereby improving the stability of the connection between the roll changing car body and the rolling mill.

[0025] 4. In this invention, the roll changing car can install the upper work roll and the lower work roll to be installed onto the finishing mill, eliminating the technical problem of inaccurate lowering of the upper work roll during the roll changing process caused by the movement of the roll changing car on the movable cover plate and the processing error between each set of work rolls. It can realize efficient, stable and fast fully automatic roll changing. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of a roll changing device for a rolling mill proposed in this invention;

[0027] Figure 2 This is an enlarged schematic diagram of the fixing frame structure of a roll changing device for a rolling mill proposed in this invention;

[0028] Figure 3 This is an enlarged structural diagram of the roll changing car body of a roll changing device for a rolling mill proposed in this invention;

[0029] Figure 4 This is a partial cross-sectional view of a roll changing device for a rolling mill proposed in this invention.

[0030] Figure 5 This is a partially enlarged structural schematic diagram of a roll changing device for a rolling mill proposed in this invention;

[0031] Figure 6 This is a schematic diagram of the process structure of a roll changing method for a rolling mill proposed in this invention.

[0032] In the diagram: 1. Roller changing car body; 2. Slide groove; 3. First spring; 4. Slide plate; 5. Fixing frame; 6. Elastic clip; 7. Insertion hole; 8. Alternating groove; 9. Positioning groove; 10. First connecting rod; 11. First fixing block; 12. Elastic plate; 13. Second connecting rod; 14. Clamping plate; 15. Slide hole; 16. Positioning plate; 17. C-shaped frame; 18. Second spring; 19. Moving groove; 20. Fixing column; 21. U-shaped groove; 22. Insertion column; 23. L-shaped rod; 24. Wedge rod; 25. First slot; 26. Second slot; 27. First locking block; 28. Second locking block; 29. ​​Fixing plate; 30. First guide groove; 31. Second fixing block; 32. Third spring; 33. Fixing rod; 34. Second guide groove. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Reference Figures 1-6A roll changing device for a rolling mill includes a roll changing car body 1 and a fixing frame 5 fixed on the rolling mill. A groove 2 is provided at the bottom of the roll changing car body 1, and a sliding plate 4 is slidably connected within the groove 2. Two first springs 3 are welded to one side of the sliding plate 4 and are fixed to the groove 2. Two protrusions are provided on one side of the fixing frame 5, and the sliding plate 4 is located between the two protrusions. A fixing post 20 is bolted to one side of the roll changing car body 1, and two springs are welded to one side of the fixing frame 5 to clamp the fixing post 20. The roller changer 6 has two insertion posts 22 and two positioning plates 16 welded to one side. Two insertion holes 7 are provided on each of the two protrusions, and the insertion posts 22 are inserted into the insertion holes 7. The top of the fixing frame 5 has two positioning grooves 9, and the positioning plates 16 are inserted into the positioning grooves 9. One side of the fixing frame 5 is provided with a fixing assembly for fixing the fixing posts 20, positioning plates 16, and insertion posts 22. One side of the roller changer 1 is provided with a disassembly assembly for detaching the roller changer 1 from the fixing frame 5. The fixing frame 5 is then fixed to... On the rolling mill, the slide plate 4 on the roll changing carriage 1 is inserted between the two protrusions on the fixed frame 5. Then, the roll changing carriage 1 is pushed to move. At this time, the fixed frame 5 will push the slide plate 4 into the slide groove 2. The slide plate 4 will squeeze the first spring 3. At the same time, the insertion post 22 on the roll changing carriage 1 will be inserted into the insertion hole 7 on the fixed frame 5. The positioning plate 16 will be inserted into the positioning groove 9. The fixed post 20 will deform by squeezing the elastic bracket 6 through its own arc surface. When the insertion post 22 is fully inserted into the insertion hole 7 and the positioning plate 16 is fully inserted into the positioning groove 9, the elastic bracket 6 will clamp the fixed post 20 with its own elasticity. The fixing component will assist in fixing the fixed post 20, the positioning plate 16 and the insertion post 22, so that the roll changing carriage 1 and the fixed frame 5 can be stably connected. Thus, the roll changing carriage 1 can be positioned and connected to the rolling mill without adjusting the position of the roll changing carriage 1 multiple times, which improves the efficiency of roll disassembly. The roll changing carriage 1 can also be separated from the fixed frame 5 by disassembly component.

[0035] In this invention, the fixing assembly includes two first fixing blocks 11 and two second fixing blocks 31. Both the first fixing blocks 11 and the two second fixing blocks 31 are welded to one side of a fixing frame 5. One side of the fixing frame 5 is provided with two first connecting rods 10 and two second connecting rods 13. Each of the two first connecting rods 10 has a second guide groove 34 on one side, and the two first fixing blocks 11 are respectively located within and slidably connected to the two guide grooves 34. Each of the two second connecting rods 13 has a first guide groove 30 on one side, and the two second fixing blocks 31 are respectively located within and slidably connected to the two guide grooves 30. A third spring 32 is welded to one side of each of the two second fixing blocks 31, and the third spring 32 is connected to the first guide groove. 30 are fixed together. A fixing rod 33, passing through the first connecting rod 10 and the second connecting rod 13, is welded between adjacent first fixing blocks 11 and second fixing blocks 31. Two elastic plates 12 are welded between adjacent first connecting rods 10 and second connecting rods 13. Clamping plates 14 for holding the fixing post 20 are welded to the adjacent ends of the two second connecting rods 13. The bottom of each of the two positioning grooves 9 has a clearance groove 8 connected to the insertion hole 7. The two first connecting rods 10 extend into the two clearance grooves 8 respectively. A first locking block 27 is welded to the bottom of each of the two first connecting rods 10 at the position within the clearance groove 8. A second locking groove 26 is opened on one side of each of the two insertion posts 22, and the first locking block 27 engages with the second locking groove 26. The tops of each of the two first connecting rods 10 are welded with… The second locking block 28 has a first locking groove 25 at the bottom of each of the two positioning plates 16, and the second locking block 28 engages with the first locking groove 25. The fixing post 20 moves by pressing the clamping plate 14 with its own arc surface. At this time, because the insert post 22 blocks the first locking block 27 and the positioning plate 16 blocks the second locking block 28, the clamping plate 14 will drive the second connecting rod 13 to move through the second fixing block 31 during the movement, while the first connecting rod 10 will not move. Therefore, the second connecting rod 13 will compress the elastic plate 12 and deform during the movement. At the same time, the second connecting rod 13 will compress the third spring 32. When the insert post 22 is fully inserted into the insertion hole 7 and the positioning plate 16 is fully inserted into the positioning groove 9, the elastic bracket 6 will move by its own arc surface. The elastic force of the body clamps the fixed column 20, while the elastic plate 12 pushes the first connecting rod 10 through the first fixed block 11 to move. The first connecting rod 10 drives the first locking block 27 and the second locking block 28 to move, so that the first locking block 27 enters the second locking groove 26 on the insertion column 22 and the second locking block 28 enters the first locking groove 25 on the positioning plate 16. At the same time, the clamping plate 14 assists in clamping the fixed column 20 under the force of the third spring 32. The disassembly assembly includes a sliding hole 15, which is opened in the roller changing car body 1 and penetrates the roller changing car body 1. A C-shaped frame 17 is provided in the sliding hole 15 and passes through the roller changing car body 1. A fixing plate 29 is welded to one side of each of the two first connecting rods 10.The bottom of the C-shaped frame 17 has two inclined surfaces, which are in contact with the fixed plate 29. Two wedge-shaped rods 24 are slidably connected in the sliding hole 15, and the inclined surfaces of the wedge-shaped rods 24 are in contact with the C-shaped frame 17. The roller changing car body 1 is provided with a support assembly for supporting the C-shaped frame 17. The support assembly includes a U-shaped groove 21, which is opened in the roller changing car body 1 and is connected to the sliding hole 15. Two moving grooves 19 are opened at the bottom of the U-shaped groove 21. L-shaped rods 23 are slidably connected in both moving grooves 19 and can contact the C-shaped frame 17. A second spring 18 is welded to one side of each of the two L-shaped rods 23 and is fixed to the roller changing car body 1. When the insertion post 22 is fully inserted into the insertion hole 7 and the positioning plate 16 is fully inserted into the positioning groove 9, the fixed frame 5 will push the L-shaped rods 23. Moving along the moving groove 19, the L-shaped rod 23 compresses the second spring 18 and no longer supports the mortise frame 17. Simultaneously, the mortise frame 17 contacts the fixing plate 29 on the first connecting rod 10. When it is necessary to separate the roller changing carriage 1 from the fixing frame 5, the two wedge-shaped rods 24 are pushed to move towards each other along the sliding hole 15. The two wedge-shaped rods 24 push the mortise frame 17 downwards via their inclined surfaces. The mortise frame 17 then pushes the fixing plate 29 to move via its inclined surfaces. The fixing plate 29 drives the first connecting rod 10 to move through the first fixing block 11. The first connecting rod 10 drives the first locking block 27 and the second locking block 28 to move and compress the elastic plate 12, causing deformation. This disengages the first locking block 27 from the second locking groove 26 and the second locking block 28 from the first locking groove 25. At this point, the roller changing carriage 1 can be separated from the fixing frame 5.

[0036] This invention also proposes a roll changing method for a rolling mill, comprising the following steps:

[0037] S1: Disassemble the rolling mill, remove the rolling mill cover and bearing seat cooling water pipes, then lift away all the protective plates and open the front and rear gantry frames;

[0038] S2: Roller changing car setting, adjust the gap between the guide wheel of the movable cover plate and the liner plates on both sides of the guide wheel, set the roller changing car push waiting position on the fixed platform, and set the roller changing car pull-out lower working roller position, roller changing car upper working roller limit position and roller changing car lower working roller limit position on the movable cover plate.

[0039] S3: Roller changing car positioning connection, insert the slide plate 4 on the roller changing car body 1 between the two protrusions on the fixed frame 5, and then push the roller changing car body 1 to move. At this time, the fixed frame 5 will push the slide plate 4 into the slide groove 2, and the slide plate 4 will squeeze the first spring 3. At the same time, the insertion post 22 on the roller changing car body 1 will be inserted into the insertion hole 7 on the fixed frame 5, and the positioning plate 16 will be inserted into the positioning groove 9. The fixed post 20 will deform by squeezing the elastic bracket 6 through its own arc surface. When the insertion post 22 is fully inserted into the insertion hole 7 and the positioning plate 16 is fully inserted into the positioning groove 9, the elastic bracket 6 will clamp the fixed post 20 through its own elasticity, and the fixing component will provide auxiliary fixing for the fixed post 20, the positioning plate 16 and the insertion post 22.

[0040] S4: Roll Change. The roll change trolley moves from the roll change trolley push-roll waiting position to the roll change trolley pull-out lower work roll position, and then moves to the roll change trolley lower work roll loading limit position. The roll change trolley hooks the lower work roll to be replaced and pulls the lower work roll and upper work roll to be replaced toward the roll change trolley push-roll waiting position until the lower work roll and upper work roll to be replaced reach the transverse platform. The roll change trolley disengages from the lower work roll to be replaced, the transverse platform moves, and the lower work roll and upper work roll to be installed on the transverse platform reach the roll loading position. The roll change trolley pushes the lower work roll and upper work roll to be installed... The roll changing trolley operates until it reaches the limit position for installing the upper work roll, where the upper work roll to be installed is installed. When the roll changing trolley reaches the limit position for installing the lower work roll, it disengages from the lower work roll to be installed and installs the lower work roll to be installed. The roll changing trolley can install both the upper and lower work rolls to be installed onto the finishing mill. This eliminates the technical problem of inaccurate lowering of the upper work roll during the roll changing process caused by the movement of the roll changing trolley on the movable cover plate and the processing errors between each set of work rolls. It can achieve efficient, stable, and fast fully automatic roll changing.

[0041] S5: Roll mill installation. After the roll change is completed, install the cooling water pipes, retract the front and rear gantry frames, adjust the inlet and outlet, install the mill cover, adjust the roll gap, and cover the guard plate.

[0042] In particular, after the disassembly of the rolling mill is completed, it is necessary to clean the iron oxide scale and debris on the rolling mill. The rolling change trolley moves from the rolling change trolley push-roll waiting position to the rolling change trolley pull-out lower work roll position, and then moves to the rolling change trolley lower work roll loading limit position. This includes the following steps: After the rolling change trolley moves from the rolling change trolley push-roll waiting position to the rolling change trolley pull-out lower work roll position, the rolling mill performs work roll changing preparation work; when the rolling change trolley moves to the rolling change trolley lower work roll loading limit position, the lower work roll connecting shaft of the rolling mill is clamped and closed, and the lower work roll clamping plate of the rolling mill is opened.

[0043] The working principle of this embodiment is as follows: In use, the fixing frame 5 is fixed on the rolling mill, and then the slide plate 4 on the roll changing carriage 1 is inserted between the two protrusions on the fixing frame 5. Then, the roll changing carriage 1 is pushed to move. At this time, the fixing frame 5 will push the slide plate 4 into the slide groove 2, and the slide plate 4 will squeeze the first spring 3. At the same time, the insertion post 22 on the roll changing carriage 1 will be inserted into the insertion hole 7 on the fixing frame 5, and the positioning plate 16 will be inserted into the positioning groove 9. The fixing post 20 will deform by squeezing the elastic bracket 6 through its own arc surface. At the same time, the fixing post 20 will move by squeezing the clamping plate 14 through its own arc surface. At this time, the insertion post 22 blocks the first clamping block 27, and the positioning plate 16 blocks the second clamping block 28. Therefore, during the movement of the clamping plate 14, the second connecting rod 13 will move through the second fixing block 31, while the first connecting rod 10 will not move. Thus, the second connecting rod 13 will deform by compressing the elastic plate 12 during its movement. Simultaneously, the second connecting rod 13 will compress the third spring 32. When the insertion post 22 is fully inserted into the insertion hole 7 and the positioning plate 16 is fully inserted into the positioning groove 9, the elastic bracket 6 will clamp the fixing post 20 using its own elasticity. At the same time, the elastic plate 12 will push the first connecting rod 10 through the first fixing block 11 using its own elasticity. The first connecting rod 10 will then move the first locking block 27 and the second locking block 28, causing the first locking block 27 to advance... The second locking block 28 is inserted into the second slot 26 on the insert post 22, and then into the first slot 25 on the positioning plate 16. Simultaneously, the clamping plate 14, under the force of the third spring 32, provides auxiliary clamping for the fixing post 20, ensuring a stable connection between the roll changing carriage 1 and the fixing frame 5. This allows for the positioning and connection of the roll changing carriage 1 to the rolling mill, eliminating the need for multiple adjustments to the position of the roll changing carriage 1 and improving the efficiency of roll disassembly. When the insert post 22 is fully inserted into the insertion hole 7 and the positioning plate 16 is fully inserted into the positioning groove 9, the fixing frame 5 pushes the L-shaped rod 23 to move along the moving groove 19. The L-shaped rod 23 compresses the second spring 18 and no longer supports the C-shaped frame 17. At the same time, the C-shaped... The frame 17 will contact the fixing plate 29 on the first connecting rod 10. When it is necessary to separate the roller changing car body 1 from the fixing frame 5, the two wedge rods 24 are pushed to move towards each other along the sliding hole 15. The two wedge rods 24 will push the frame 17 downward through their own inclined surfaces. The frame 17 will push the fixing plate 29 to move through its own inclined surfaces. The fixing plate 29 will drive the first connecting rod 10 to move through the first fixing block 11. The first connecting rod 10 will drive the first locking block 27 and the second locking block 28 to move and squeeze the elastic plate 12 to deform, so that the first locking block 27 is disengaged from the second locking groove 26 and the second locking block 28 is disengaged from the first locking groove 25. At this time, the roller changing car body 1 can be separated from the fixing frame 5.

[0044] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0045] In the description herein, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A roll changing device for a rolling mill, comprising a roll changing car body (1) and a fixing frame (5) fixed on the rolling mill, characterized in that, The bottom of the roller changing car body (1) is provided with a sliding groove (2), and a sliding plate (4) is slidably connected in the sliding groove (2). Two first springs (3) are fixedly connected to one side of the sliding plate (4), and the first springs (3) are fixed to the sliding groove (2). Two protrusions are provided on one side of the fixing frame (5), and the sliding plate (4) is located between the two protrusions. A fixing post (20) is fixedly connected to one side of the roller changing car body (1), and two elastic clamps (6) are fixedly connected to one side of the fixing frame (5) to hold the fixing post (20). One side of the roller changing car body (1) The side is fixedly connected to two inserts (22) and two positioning plates (16). Two holes (7) are opened on one side of each of the two protrusions, and the inserts (22) are inserted into the holes (7). Two positioning grooves (9) are opened on the top of the fixing frame (5), and the positioning plates (16) are inserted into the positioning grooves (9). A fixing component is provided on one side of the fixing frame (5) to assist in fixing the fixing posts (20), positioning plates (16) and inserts (22). A disassembly component is provided on one side of the roller changing car body (1) to separate the roller changing car body (1) from the fixing frame (5).

2. The roll changing equipment for a rolling mill according to claim 1, characterized in that, The fixing assembly includes two first fixing blocks (11) and two second fixing blocks (31). The two first fixing blocks (11) and the two second fixing blocks (31) are fixedly connected to one side of the fixing frame (5). The fixing frame (5) has two first connecting rods (10) and two second connecting rods (13) on one side. The two first connecting rods (10) each have a second guide groove (34) on one side. The two first fixing blocks (11) are respectively located in the two second guide grooves (34) and are slidably connected to the second guide grooves (34). The two second connecting rods (13) each have a first guide groove (30) on one side. The two second fixing blocks (31) are respectively located in the two first guide grooves (30) and are slidably connected to the first guide grooves (30). A third spring (32) is fixedly connected to one side of the two second fixing blocks (31) and is fixed to the first guide groove (30). A through-hole is fixedly connected between adjacent first fixing blocks (11) and second fixing blocks (31). The first connecting rod (10) and the second connecting rod (13) are fixed by a rod (33). Two elastic plates (12) are fixedly connected between adjacent first connecting rods (10) and second connecting rods (13). Each of the two second connecting rods (13) is fixedly connected to a clamping plate (14) for holding the fixed post (20). The bottom of each of the two positioning grooves (9) is provided with a clearance groove (8) that communicates with the insertion hole (7). The two first connecting rods (10) extend into the two clearance grooves respectively. Inside 8), the bottom of the two first connecting rods (10) is fixedly connected to the first locking block (27) in the position of the clearance groove (8). The two inserts (22) are provided with a second locking groove (26) on one side, and the first locking block (27) is engaged with the second locking groove (26). The top of the two first connecting rods (10) is fixedly connected to the second locking block (28). The bottom of the two positioning plates (16) is provided with a first locking groove (25), and the second locking block (28) is engaged with the first locking groove (25).

3. A roll changing device for a rolling mill according to claim 2, characterized in that, The disassembly assembly includes a sliding hole (15), which is opened inside the roller changing car body (1) and passes through the roller changing car body (1). A U-shaped frame (17) is provided inside the sliding hole (15) and passes through the roller changing car body (1). A fixing plate (29) is fixedly connected to one side of each of the two first connecting rods (10). Two inclined surfaces are provided at the bottom of the U-shaped frame (17). Two wedge-shaped rods (24) are slidably connected inside the sliding hole (15). A support assembly for supporting the U-shaped frame (17) is provided inside the roller changing car body (1).

4. A roll changing device for a rolling mill according to claim 3, characterized in that, The support assembly includes a U-shaped groove (21), which is opened inside the roller changing car body (1) and is connected to the sliding hole (15). Two movable grooves (19) are opened at the bottom of the U-shaped groove (21). An L-shaped rod (23) is slidably connected in each of the two movable grooves (19). A second spring (18) is fixedly connected to one side of each of the two L-shaped rods (23), and the second spring (18) is fixed to the roller changing car body (1).

5. A method for changing rolls in a rolling mill, characterized in that, For operating the roll changing equipment of the rolling mill as described in any one of claims 1-4, the following steps are included: S1: Disassemble the rolling mill, remove the rolling mill cover and bearing seat cooling water pipes, then lift away all the protective plates and open the front and rear gantry frames; S2: Roller changing car setting, adjust the gap between the guide wheel of the movable cover plate and the liner plates on both sides of the guide wheel, set the roller changing car push waiting position on the fixed platform, and set the roller changing car pull-out lower working roller position, roller changing car upper working roller limit position and roller changing car lower working roller limit position on the movable cover plate. S3: Roller changing car positioning connection, insert the slide plate (4) on the roller changing car body (1) between the two protrusions on the fixed frame (5), and then push the roller changing car body (1) to move. At this time, the fixed frame (5) will push the slide plate (4) to move into the slide groove (2), and the slide plate (4) will squeeze the first spring (3). At the same time, the insert post (22) on the roller changing car body (1) will be inserted into the insertion hole (7) on the fixed frame (5), the positioning plate (16) will be inserted into the positioning groove (9), and the fixed post (20) will deform by squeezing the elastic bracket (6) through its own arc surface. When the insert post (22) is fully inserted into the insertion hole (7) and the positioning plate (16) is fully inserted into the positioning groove (9), the elastic bracket (6) will clamp the fixed post (20) through its own elasticity, and the fixing component will assist in fixing the fixed post (20), the positioning plate (16) and the insert post (22). S4: Roll changing. The roll changing trolley moves from the roll changing trolley push-roll waiting position to the roll changing trolley pull-out lower work roll position, and then moves to the roll changing trolley lower work roll loading limit position. The roll changing trolley hooks the lower work roll to be replaced and pulls the lower work roll to be replaced and the upper work roll to be replaced toward the roll changing trolley push-roll waiting position until the lower work roll to be replaced and the upper work roll to be replaced reach the transverse platform. The roll changing trolley disengages from the lower work roll to be replaced, the transverse platform moves, and the lower work roll to be installed on the transverse platform reaches the roll loading position. The roll changing trolley pushes the lower work roll to be installed and the upper work roll to be installed until the roll changing trolley reaches the roll changing trolley upper work roll loading limit position and the upper work roll to be installed is installed. The roll changing trolley reaches the roll changing trolley lower work roll loading limit position and disengages from the lower work roll to be installed and the lower work roll to be installed is installed. S5: Roll mill installation. After the roll change is completed, install the bearing seat cooling water pipe, retract the front and rear gantry frames, adjust the inlet and outlet, install the cover, adjust the roll gap, and cover the guard plate.

6. A method for changing rolls in a rolling mill according to claim 5, characterized in that, After the rolling mill is disassembled, it is necessary to clean the iron oxide scale and debris from the rolling mill.

7. A method for changing rolls in a rolling mill according to claim 5, characterized in that, The process of moving the roll changing trolley from the roll changing trolley push-roll waiting position to the roll changing trolley pull-out lower work roll position, and then moving it to the roll changing trolley loading lower work roll limit position, includes the following steps: After the roll changing trolley moves from the roll changing trolley push-roll waiting position to the roll changing trolley pull-out lower work roll position, the rolling mill performs work roll changing preparation work; when the roll changing trolley moves to the roll changing trolley loading lower work roll limit position, the lower work roll connecting shaft of the rolling mill is clamped and closed, and the lower work roll clamping plate of the rolling mill is opened.

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