Intermediate roll shifting device for six-roll mill

Abstract

The utility model discloses an intermediate roll shifting device for a six-roll mill, which is characterized in that two ends of an upper intermediate roll and a lower intermediate roll are respectively and fixedly arranged in an intermediate roll bearing seat assembly on a rack, the intermediate roll shifting device further comprises two intermediate roll shifting mechanisms, and the upper intermediate roll and the lower intermediate roll are respectively driven by the intermediate roll shifting mechanisms; each middle roller shifting mechanism comprises a roller shifting driving device, the two ends of each roller shifting driving device are connected with locking pin blocks respectively, and the two locking pin blocks are detachably connected with the corresponding middle roller bearing seat assemblies respectively. According to the intermediate roll shifting device for the six-roll mill, the intermediate roll shifting action can be completed only by driving the intermediate roll assembly through the intermediate roll shifting mechanism, the rolled plate shape control is guaranteed, and the problems that an existing structure is complex, the operation requirement precision is high, and the leakage point risk exists are solved.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical engineering equipment technology, and relates to an intermediate roll shifting device for a six-roll mill. Background Technology

[0002] Currently, six-roll cold rolling mills are widely used in the production of cold-rolled strip steel. This involves adding an intermediate roll between the work roll and support roll of a traditional four-roll mill. This intermediate roll can move axially left and right, working in conjunction with the positive and negative hydraulic bending of the work roll to reduce or improve harmful bending moments between the rolls. This enhances the cold rolling mill's ability to control the strip shape during rolling, thereby improving the strip shape quality, controlling the strip's straightness, and in automated rolling processes, improving the control of strip crown and straightness, reducing edge thinning, and enhancing the quality of the finished strip to meet the market's demand for high-end sheet metal.

[0003] Currently, most six-roll mills on the market use hydraulic cylinders to drive the intermediate roll lateral movement structure to complete the intermediate roll shifting. This type of shifting structure drives the intermediate roll bending block through the shifting mechanism, thereby driving the intermediate roll assembly to move axially. This structure is complex with many sliding surfaces, which requires high machining accuracy for related parts such as the mill stand sliding surfaces and its slide plates, bending roll blocks and their matching slide plates. The assembly mill requires high precision, there are many parts to be processed, and the operation is troublesome. Moreover, the piping on the bending roll block often uses flexible hoses for easy movement, resulting in many connection points and leakage points, which is not conducive to the user's subsequent equipment maintenance. Utility Model Content

[0004] The purpose of this invention is to provide an intermediate roll shifting device for a six-roll mill. The intermediate roll shifting action can be completed by simply driving the intermediate roll assembly itself through the intermediate roll shifting mechanism, ensuring the control of the rolled plate shape and solving the problems of complex structure, high precision requirements for operation and risk of leakage in the existing system.

[0005] The technical solution adopted by this utility model is an intermediate roll shifting device for a six-roll mill, including a frame. The frame is arranged from top to bottom as an upper support roll, an upper intermediate roll, an upper work roll, a lower work roll, a lower intermediate roll, and a lower support roll. The frame is provided with two upper intermediate roll bearing seat assemblies and two lower intermediate roll bearing seat assemblies. The two upper intermediate roll bearing seat assemblies are respectively connected to the two ends of the upper intermediate roll, and the two lower intermediate roll bearing seat assemblies are respectively connected to the two ends of the lower intermediate roll. It also includes two intermediate roll shifting mechanisms, and the upper intermediate roll and the lower intermediate roll are driven by the intermediate roll shifting mechanisms.

[0006] Each intermediate roll shifting mechanism includes a roll shifting drive device, with locking pins connected to both ends of the drive device. The two locking pins are detachably connected to the corresponding intermediate roll bearing seats.

[0007] The features of this utility model also include:

[0008] The two intermediate roller shifting mechanisms are respectively assembled and connected to the upper intermediate roller bearing seat or the lower intermediate roller bearing seat on the transmission side.

[0009] Each intermediate roller bearing housing assembly has a bent roller block on both sides. Each bent roller block has a bent roller block slide plate on the side near the upper intermediate roller bearing housing assembly. The upper intermediate roller bearing housing assembly has an intermediate roller bearing housing slide plate on the side near the bent roller block. There is a gap between the intermediate roller bearing housing slide plate and the bent roller block slide plate.

[0010] The assembly structure of the two lower intermediate roller bearing housings is the same as that of the upper intermediate roller bearing housing.

[0011] The intermediate roll shifting mechanism includes a first connecting frame and a second connecting frame mounted on the frame. The first connecting frame and the second connecting frame are arranged in parallel and connected by a connecting beam. A roll shifting drive device is also provided between the first connecting frame and the second connecting frame.

[0012] Two locking pins are slidably mounted on the first connecting frame and the second connecting frame, respectively.

[0013] The roller drive device includes a main gearbox and a slave gearbox. The main gearbox is mounted on the second connecting frame, and the slave gearbox is mounted on the first connecting frame. The main gearbox is equipped with a hydraulic motor, and the output shaft of the hydraulic motor is connected to a first worm gear. The slave gearbox is equipped with a second worm gear, and the first worm gear and the second worm gear are connected by a synchronous shaft.

[0014] The main gearbox is equipped with a first worm wheel that meshes with the first worm. The shaft of the first worm wheel passes horizontally through the main gearbox and is connected to a first gear. A second gear that meshes with the first gear is rotatably mounted on the second connecting frame. The central shaft of the second gear is connected to a first lead screw. The end of the first lead screw away from the second gear is connected to a corresponding locking pin block through a copper nut.

[0015] A second worm wheel that meshes with the second worm is provided inside the gearbox. The shaft of the second worm wheel passes horizontally through the gearbox and is connected to a third gear. A fourth gear that meshes with the third gear is provided on the first connecting frame. A second lead screw is connected to the central shaft of the fourth gear. The end of the second lead screw away from the fourth gear is connected to a corresponding locking pin block through a copper nut.

[0016] The first gear and the third gear have the same specifications, and the second gear and the fourth gear have the same specifications.

[0017] The end of the first worm gear away from the hydraulic motor passes through the main gearbox and is connected to the first end of the synchronous shaft. The second worm gear passes through the second end of the gearbox connected to the synchronous shaft.

[0018] Connecting blocks are connected to both sides of the upper intermediate roller bearing housing assembly or the lower intermediate roller bearing housing assembly near the intermediate roller shifting mechanism. Each connecting block has a pin hole, and each locking pin block is equipped with a locking hydraulic cylinder that mates with the pin hole. The cylinder rod of the mating locking hydraulic cylinder is movably set in the corresponding pin hole.

[0019] One of the locking pins is equipped with a displacement sensor.

[0020] The beneficial effects of this utility model are:

[0021] (1) The intermediate roll shifting device for a six-roll mill provided by this utility model has a simple structure and is convenient and practical. It only needs to drive the intermediate roll bearing assembly itself through the intermediate roll shifting mechanism to complete the intermediate roll shifting action, thus ensuring the purpose of controlling the shape of the rolled plate.

[0022] (2) The intermediate roll shifting device for a six-roll mill provided by this utility model is easy to operate, requires less processing and assembly, has low processing and assembly costs, and does not move the bending roll block, so that the bending roll block piping can be made of welded steel pipe, reducing the interface between pipes, thereby reducing the risk of leakage. Subsequent operation and maintenance are simple and easy to promote. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the six-roll mill device of this utility model;

[0024] Figure 2 This is a schematic diagram of the overall structure of the intermediate roll and intermediate roll shifting device of the six-roll mill of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the intermediate roll shifting device for a six-roll mill according to this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the roller drive device of this utility model;

[0027] Figure 5 This is a schematic diagram of the internal structure of the main reduction gearbox in the roller drive device of this utility model;

[0028] Figure 6 This is a schematic diagram of the internal structure of the reduction gearbox in the roller drive device of this utility model;

[0029] Figure 7 This is a top view of the locking pin block structure of this utility model.

[0030] In the diagram, 1. Upper support roller, 2. Lower support roller, 3. Upper working roller, 4. Lower working roller, 5. Upper intermediate roller, 6. Lower intermediate roller, 7. Upper intermediate roller bearing housing assembly, 8. Lower intermediate roller bearing housing assembly, 9. Intermediate roller bearing housing slide plate, 10. Intermediate roller shifting mechanism, 11. Displacement sensor, 12. First connecting frame, 13. Second connecting frame, 14. Connecting beam, 15. Shifting roller drive device, 16. Locking pin block, 17. Locking hydraulic cylinder, 18. Connecting block, 19. Cylinder rod, 20. Hydraulic motor, 21. Main reduction gearbox, 22. Synchronous shaft, 23. Slave reduction gearbox, 24. First worm gear, 25. First worm wheel, 26. First lead screw, 27. First gear, 28. Second gear, 29. Second worm gear, 30. Second worm wheel, 31. Copper nut, 32. Bending roller block, 33. Bending roller block slide plate. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0032] Intermediate roll shifting device for a six-roll mill, such as Figure 1 As shown, the frame is arranged from top to bottom as follows: upper support roller 1, upper intermediate roller 5, upper working roller 3, lower working roller 4, lower intermediate roller 6 and lower support roller 2. The support roller prevents the working roller from bending. The upper intermediate roller 5 and the lower intermediate roller 6 are respectively fixed at both ends in the intermediate roller bearing seat assembly on the frame. The specific structure is as follows: the frame is provided with two upper intermediate roller bearing seat assemblies 7 and two lower intermediate roller bearing seat assemblies 8. The two upper intermediate roller bearing seat assemblies 7 are respectively connected to the two ends of the upper intermediate roller 5, and the two lower intermediate roller bearing seat assemblies 8 are respectively connected to the two ends of the lower intermediate roller 6. The two intermediate roller shifting mechanisms 10 are respectively connected to the upper intermediate roller bearing seat assembly 7 or the lower intermediate roller bearing seat assembly 8 on the transmission side.

[0033] Each intermediate roller bearing housing assembly 7 has a bent roller block 32 on both sides. Each bent roller block 32 has a bent roller block slide plate 33 on the side closest to the upper intermediate roller bearing housing assembly 7. The upper intermediate roller bearing housing assembly 7 also has an intermediate roller bearing housing slide plate 9 on the side closest to the bent roller block 32. There is a certain gap between the intermediate roller bearing housing slide plate 9 and the bent roller block slide plate 33. The specific structure of the two lower intermediate roller bearing housing assemblies 8 is the same as that of the upper intermediate roller bearing housing assembly 7, and will not be described in detail here.

[0034] Slide plates are installed on both sides of the upper intermediate roll bearing housing assembly 7 and the lower intermediate roll bearing housing assembly 8, as well as on the corresponding curved roll block sliding surfaces. When the upper and lower intermediate rolls need to be moved, the two slide plates move easily through a suitable gap. Throughout the process, only the intermediate roll bearing housing assembly drives the intermediate roll to move axially, while the curved roll block does not move. Therefore, the curved roll block piping can be made of welded steel pipes, reducing the number of joints between pipes and thus reducing the risk of leakage. Subsequent operation and maintenance are simple and easy to promote.

[0035] It also includes two intermediate roller shifting mechanisms 10, such as Figure 2 As shown, the upper intermediate roller 5 and the lower intermediate roller 6 are driven by the corresponding intermediate roller shifting mechanism 10. In use, the intermediate roller shifting mechanism 10 drives the intermediate roller bearing seat assembly to move, thereby driving the intermediate roller to move and completing the intermediate roller shifting action.

[0036] Each intermediate roll shifting mechanism 10 includes a roll shifting drive device 15, with locking pins 16 connected to both ends of the roll shifting drive device 15. The two locking pins 16 are respectively assembled and detachably connected to the corresponding intermediate roll bearing seats.

[0037] Specifically, such as Figure 3 As shown, the intermediate roller shifting mechanism 10 includes a first connecting frame 12 and a second connecting frame 13 mounted on the frame. The first connecting frame 12 and the second connecting frame 13 are arranged in parallel. The first connecting frame 12 and the second connecting frame 13 are connected by a connecting beam 14. A roller shifting drive device 15 is provided between the first connecting frame 12 and the second connecting frame 13.

[0038] Two locking pins 16 are slidably mounted on the first connecting frame 12 and the second connecting frame 13 respectively. Specifically, the first connecting frame 12 and the second connecting frame 13 are respectively provided with sliding grooves, and the two locking pins 16 are provided with sliding strips, which can be slidably mounted in the corresponding sliding grooves.

[0039] like Figures 4-6 As shown, the roller drive device 15 includes a main reduction gearbox 21 and a driven reduction gearbox 23. The main reduction gearbox 21 is mounted on the second connecting frame 13, and the driven reduction gearbox 23 is mounted on the first connecting frame 12. A hydraulic motor 20 is mounted on the main reduction gearbox 21, and the output shaft of the hydraulic motor 20 is connected to a first worm gear 24. A second worm gear 29 is mounted inside the driven reduction gearbox 23. The first worm gear 24 and the second worm gear 29 are connected by a synchronous shaft 22. Specifically, the end of the first worm gear 24 away from the hydraulic motor 20 horizontally passes through the main reduction gearbox 21 and is connected to the first end of the synchronous shaft 22. The second worm gear 29 horizontally passes through the driven reduction gearbox 23 and is connected to the second end of the synchronous shaft 22. The synchronous shaft 22 can be connected to the first worm gear 24 and the second worm gear 29 by a universal joint. This is a mature technology and will not be described in detail here.

[0040] The main gearbox 21 is equipped with a first worm gear 25 that meshes with the first worm 24. The shaft of the first worm gear 25 passes horizontally through the main gearbox 21 and is connected to a first gear 27. A second gear 28 that meshes with the first gear 27 is rotatably mounted on the second connecting frame 13. The central shaft of the second gear 28 is connected to a first lead screw 26. The end of the first lead screw 26 away from the second gear 28 is connected to a corresponding locking pin 16 through a copper nut 31.

[0041] A second worm wheel 30 that meshes with the second worm 29 is provided inside the gearbox 23. The shaft of the second worm wheel 30 passes horizontally through the gearbox 23 and is connected to a third gear. A fourth gear that meshes with the third gear is provided on the first connecting frame 12. A second lead screw is connected to the central shaft of the fourth gear. The end of the second lead screw away from the fourth gear is connected to the corresponding locking pin 16 through a copper nut 31.

[0042] The first gear 27 has the same specifications as the third gear, and the second gear 28 has the same specifications as the fourth gear.

[0043] In use, the roller drive device 15 is driven by the hydraulic motor 20 to rotate the first worm 24 in the main reduction gearbox 21. The first worm 24 drives the first worm wheel 25 to rotate, and the first gear 27 and the second gear 28 rotate accordingly, thereby driving the first lead screw 26 to move axially. At the same time, the first worm 24 drives the second worm 29 to rotate through the synchronous shaft 22. The second worm 29 drives the second worm wheel 30 to rotate, and the third gear and the fourth gear rotate accordingly, thereby driving the second lead screw to move axially. When the lead screw moves axially, it pushes the locking pin block to move axially at the same time.

[0044] Connecting blocks 18 are respectively connected to both sides of the upper intermediate roller bearing housing assembly 7 or the lower intermediate roller bearing housing assembly 8 near the intermediate roller shifting mechanism 10. Each connecting block 18 has a pin hole, and each locking pin block 16 is equipped with a locking hydraulic cylinder 17 that mates with the corresponding pin hole. Figure 7 As shown, the cylinder rod 19 of each locking hydraulic cylinder 17 is movably disposed in the corresponding pin hole.

[0045] Furthermore, a displacement sensor 11 is provided on one of the locking pins 16. When the intermediate roll starts to shift, the displacement sensor 11 sends a signal, and the displacement of the displacement sensor 11 is controlled by electricity to achieve the purpose of automatic control of the intermediate roll shifting.

[0046] Working method: When the intermediate roll needs to be moved, the locking pins 16 on both sides of the mill are hydraulically driven to extend the cylinder rod 19 of the built-in locking hydraulic cylinder 17 into the pin hole of the corresponding connecting block 18, so that the locking pin 16 and the intermediate roll are assembled and connected as a whole. Conversely, when the intermediate roll needs to be replaced, the cylinder rod 19 of the built-in locking hydraulic cylinder 17 is disengaged from the pin hole of the corresponding connecting block 18, so that the intermediate roll can be freely replaced.

[0047] Start the hydraulic motor 20, which drives the first worm 24 in the main reduction gearbox 21 to rotate. The first worm 24 drives the first worm wheel 25 to rotate, and the first gear 27 and the second gear 28 rotate accordingly, thereby driving the first lead screw 26 to move axially. At the same time, the first worm 24 drives the second worm 29 to rotate through the synchronous shaft 22. The second worm 29 drives the second worm wheel 30 to rotate, and the third gear and the fourth gear rotate accordingly, thereby driving the second lead screw to move axially. The first lead screw 26 and the second lead screw simultaneously drive the corresponding locking pin 16 to move axially. The locking pin 16 transmits force to the intermediate roller bearing seat assembly, thereby driving the intermediate roller bearing seat assembly to move axially, completing the movement of the intermediate roller. Copper sliding plates are installed on both sides of the upper and lower intermediate roller bearing seats and the corresponding curved roller block sliding surfaces. When the upper and lower intermediate rollers need to move, the two sliding plate surfaces move easily through a suitable gap.

[0048] Meanwhile, to ensure the automated control of the rolling mill, a displacement sensor is equipped on one side of the intermediate roll shifting device. When the intermediate roll starts to shift, the displacement sensor sends a signal, and the displacement of the displacement sensor is controlled by electricity to achieve the purpose of automated control of the intermediate roll shifting. This achieves the goal of using the nut and screw structure to accurately and smoothly shift the roll while also realizing the automated control of the roll shifting, solving the problem of edge thinning in strip rolling and effectively improving the flatness of the strip.

[0049] Example 1

[0050] Intermediate roll shifting device for a six-roll mill, such as Figure 1 As shown, the frame is arranged from top to bottom as follows: upper support roller 1, upper intermediate roller 5, upper working roller 3, lower working roller 4, lower intermediate roller 6 and lower support roller 2. The support roller prevents the working roller from bending. The upper intermediate roller 5 and the lower intermediate roller 6 are respectively fixed at both ends in the intermediate roller bearing seat assembly on the frame. It also includes two intermediate roller shifting mechanisms 10. The upper intermediate roller 5 and the lower intermediate roller 6 are driven by the intermediate roller shifting mechanisms 10 respectively.

[0051] Each intermediate roll shifting mechanism 10 includes a roll shifting drive device 15, with locking pins 16 connected to both ends of the roll shifting drive device 15. The two locking pins 16 are respectively assembled and detachably connected to the corresponding intermediate roll bearing seats.

[0052] Example 2

[0053] Intermediate roll shifting device for a six-roll mill, such as Figure 1As shown, the frame is arranged from top to bottom as follows: upper support roller 1, upper intermediate roller 5, upper working roller 3, lower working roller 4, lower intermediate roller 6 and lower support roller 2. The support roller prevents the working roller from bending. The upper intermediate roller 5 and the lower intermediate roller 6 are respectively fixed at both ends in the intermediate roller bearing seat assembly on the frame. The specific structure is as follows: the frame is provided with two upper intermediate roller bearing seat assemblies 7 and two lower intermediate roller bearing seat assemblies 8. The two upper intermediate roller bearing seat assemblies 7 are respectively connected to the two ends of the upper intermediate roller 5, and the two lower intermediate roller bearing seat assemblies 8 are respectively connected to the two ends of the lower intermediate roller 6. The two intermediate roller shifting mechanisms 10 are respectively connected to the upper intermediate roller bearing seat assembly 7 or the lower intermediate roller bearing seat assembly 8 on the transmission side.

[0054] Each intermediate roll shifting mechanism 10 includes a roll shifting drive device 15, with locking pins 16 connected to both ends of the roll shifting drive device 15. The two locking pins 16 are respectively assembled and detachably connected to the corresponding intermediate roll bearing seats.

[0055] Example 3

[0056] Intermediate roll shifting device for a six-roll mill, such as Figure 1 As shown, the frame is arranged from top to bottom as follows: upper support roller 1, upper intermediate roller 5, upper working roller 3, lower working roller 4, lower intermediate roller 6 and lower support roller 2. The support roller prevents the working roller from bending. The upper intermediate roller 5 and the lower intermediate roller 6 are respectively fixed at both ends in the intermediate roller bearing seat assembly on the frame. It also includes two intermediate roller shifting mechanisms 10. The upper intermediate roller 5 and the lower intermediate roller 6 are driven by the intermediate roller shifting mechanisms 10 respectively.

[0057] Each intermediate roll shifting mechanism 10 includes a roll shifting drive device 15, with locking pins 16 connected to both ends of the roll shifting drive device 15. The two locking pins 16 are respectively assembled and detachably connected to the corresponding intermediate roll bearing seats.

[0058] Specifically, such as Figure 3 As shown, the intermediate roller shifting mechanism 10 includes a first connecting frame 12 and a second connecting frame 13 mounted on the frame. The first connecting frame 12 and the second connecting frame 13 are arranged in parallel and are connected by a connecting beam 14. A roller shifting drive device 15 is provided between the first connecting frame 12 and the second connecting frame 13.

[0059] Two locking pins 16 are slidably mounted on the first connecting frame 12 and the second connecting frame 13 respectively. Specifically, the first connecting frame 12 and the second connecting frame 13 are respectively provided with sliding grooves, and the two locking pins 16 are provided with sliding strips, which can be slidably mounted in the corresponding sliding grooves.

[0060] Example 4

[0061] Based on Example 4, the specific structure of the roller drive device 15 is further defined, such as... Figures 4-6 As shown, the roller drive device 15 includes a main reduction gearbox 21 and a driven reduction gearbox 23. The main reduction gearbox 21 is mounted on the second connecting frame 13, and the driven reduction gearbox 23 is mounted on the first connecting frame 12. A hydraulic motor 20 is mounted on the main reduction gearbox 21, and the output shaft of the hydraulic motor 20 is connected to a first worm gear 24. A second worm gear 29 is mounted inside the driven reduction gearbox 23. The first worm gear 24 and the second worm gear 29 are connected by a synchronous shaft 22. Specifically, the end of the first worm gear 24 away from the hydraulic motor 20 horizontally passes through the main reduction gearbox 21 and is connected to the first end of the synchronous shaft 22. The second worm gear 29 horizontally passes through the driven reduction gearbox 23 and is connected to the second end of the synchronous shaft 22. The synchronous shaft 22 can be connected to the first worm gear 24 and the second worm gear 29 by a universal joint. This is a mature technology and will not be described in detail here.

[0062] The main gearbox 21 is equipped with a first worm gear 25 that meshes with the first worm 24. The shaft of the first worm gear 25 passes horizontally through the main gearbox 21 and is connected to a first gear 27. A second gear 28 that meshes with the first gear 27 is rotatably mounted on the second connecting frame 13. The central shaft of the second gear 28 is connected to a first lead screw 26. The end of the first lead screw 26 away from the second gear 28 is connected to a corresponding locking pin 16 through a copper nut 31.

[0063] A second worm wheel 30 that meshes with the second worm 29 is provided inside the gearbox 23. The shaft of the second worm wheel 30 passes horizontally through the gearbox 23 and is connected to a third gear. A fourth gear that meshes with the third gear is provided on the first connecting frame 12. A second lead screw is connected to the central shaft of the fourth gear. The end of the second lead screw away from the fourth gear is connected to the corresponding locking pin 16 through a copper nut 31.

[0064] The first gear 27 has the same specifications as the third gear, and the second gear 28 has the same specifications as the fourth gear.

[0065] Example 5

[0066] To ensure automated control of the rolling mill, based on Example 4, a displacement sensor is equipped on one side of the intermediate roll shifting device. When the intermediate roll starts to shift, the displacement sensor sends a signal, and the displacement of the displacement sensor is controlled electrically to achieve automated control of the intermediate roll shifting. This achieves both precise and stable roll shifting using the nut and screw structure, and automated control of the roll shifting, solving the problem of edge thinning in strip rolling and effectively improving the flatness of the strip.

[0067] Example 6

[0068] Working method: When the intermediate roll needs to be moved, the locking pins 16 on both sides of the mill are hydraulically driven to extend the cylinder rod 19 of the built-in locking hydraulic cylinder 17 into the pin hole of the corresponding connecting block 18, so that the locking pin 16 and the intermediate roll are assembled and connected as a whole. Conversely, when the intermediate roll needs to be replaced, the cylinder rod 19 of the built-in locking hydraulic cylinder 17 is disengaged from the pin hole of the corresponding connecting block 18, so that the intermediate roll can be freely replaced.

[0069] Start the hydraulic motor 20, which drives the first worm 24 in the main reduction gearbox 21 to rotate. The first worm 24 drives the first worm wheel 25 to rotate, and the first gear 27 and the second gear 28 rotate accordingly, thereby driving the first lead screw 26 to move axially. At the same time, the first worm 24 drives the second worm 29 to rotate through the synchronous shaft 22. The second worm 29 drives the second worm wheel 30 to rotate, and the third gear and the fourth gear rotate accordingly, thereby driving the second lead screw to move axially. The first lead screw 26 and the second lead screw simultaneously drive the corresponding locking pin 16 to move axially. The locking pin 16 transmits force to the intermediate roller bearing seat assembly, thereby driving the intermediate roller bearing seat assembly to move axially, completing the movement of the intermediate roller. Copper sliding plates are installed on both sides of the upper and lower intermediate roller bearing seats and the corresponding curved roller block sliding surfaces. When the upper and lower intermediate rollers need to move, the two sliding plate surfaces move easily through a suitable gap.

Claims

1. A six-high rolling mill intermediate roll shifting device, comprising a rack, the rack sequentially sets an upper support roll (1), an upper intermediate roll (5), an upper work roll (3), a lower work roll (4), a lower intermediate roll (6) and a lower support roll (2) from top to bottom, characterized in that, Two upper middle roller bearing seat assemblies (7) and two lower middle roller bearing seat assemblies (8) are arranged on the frame respectively, the two upper middle roller bearing seat assemblies (7) are connected at two ends of the upper middle roller (5) respectively, the two lower middle roller bearing seat assemblies (8) are connected at two ends of the lower middle roller (6) respectively, and two middle roller roll shifting mechanisms (10) are further included, the upper middle roller (5) and the lower middle roller (6) are driven by the middle roller roll shifting mechanism (10) respectively. Each middle roller roll shifting mechanism (10) includes a roll shifting driving device (15), lock pin blocks (16) are connected at two ends of the roll shifting driving device (15) respectively, and the two lock pin blocks (16) are detachably connected with the corresponding middle roller bearing seat assembly.

2. The intermediate roll shifting device for a six-high rolling mill according to claim 1, characterized in that, The two middle roller roll shifting mechanisms (10) are connected with the upper middle roller bearing seat assembly (7) or the lower middle roller bearing seat assembly (8) on the transmission side respectively. Bending roller blocks (32) are arranged on two sides of each middle roller bearing seat assembly (7) respectively, a bending roller block sliding plate (33) is arranged on one side of each bending roller block (32) close to the upper middle roller bearing seat assembly (7), a middle roller bearing seat sliding plate (9) is arranged on one side of the upper middle roller bearing seat assembly (7) close to the bending roller block (32), and a gap is formed between the middle roller bearing seat sliding plate (9) and the bending roller block sliding plate (33).

3. The intermediate roll shifting device for a six-high rolling mill according to claim 2, characterized in that, The two lower middle roller bearing seat assemblies (8) have the same specific structure as the upper middle roller bearing seat assembly (7).

4. The intermediate roll shifting device for a six-high rolling mill according to claim 2, characterized in that, The middle roller roll shifting mechanism (10) includes first and second connecting frames (12) and (13) arranged on the frame, the first and second connecting frames (12) and (13) are arranged in parallel, the first and second connecting frames (12) and (13) are connected by a connecting beam (14), and a roll shifting driving device (15) is further arranged between the first and second connecting frames (12) and (13) in common. The two lock pin blocks (16) are arranged on the first and second connecting frames (12) and (13) in sliding mode respectively.

5. The intermediate roll shifting device for a six-high rolling mill according to claim 4, characterized in that The roll shifting driving device (15) includes a main reduction gearbox (21) and a slave reduction gearbox (23), the main reduction gearbox (21) is arranged on the second connecting frame (13), the slave reduction gearbox (23) is arranged on the first connecting frame (12), a hydraulic motor (20) is arranged on the main reduction gearbox (21), a first worm (24) is connected with an output shaft of the hydraulic motor (20), a second worm (29) is arranged in the slave reduction gearbox (23), and the first worm (24) and the second worm (29) are connected by a synchronous shaft (22). The main reduction gearbox (21) is provided with a first worm gear (25) engaged with the first worm (24), the rotating shaft of the first worm gear (25) penetrates the main reduction gearbox (21) and is connected with a first gear (27), the second connecting frame (13) is provided with a second gear (28) engaged with the first gear (27), the center shaft of the second gear (28) is connected with a first lead screw (26), one end of the first lead screw (26) away from the second gear (28) is connected with a corresponding locking pin block (16) through a copper nut (31); The slave reduction gearbox (23) is provided with a second worm gear (30) engaged with the second worm (29), the rotating shaft of the second worm gear (30) penetrates the slave reduction gearbox (23) and is connected with a third gear, the first connecting frame (12) is provided with a fourth gear engaged with the third gear, the center shaft of the fourth gear is connected with a second lead screw, one end of the second lead screw away from the fourth gear is connected with a corresponding locking pin block (16) through a copper nut (31); The first gear (27) and the third gear are of the same specification, and the second gear (28) and the fourth gear are of the same specification.

6. The intermediate roll shifting device for a six-high rolling mill according to claim 5, characterized in that One end of the first worm (24) away from the hydraulic motor (20) penetrates the main reduction gearbox (21) and is connected with the first end of a synchronous shaft (22), the second worm (29) penetrates the slave reduction gearbox (23) and is connected with the second end of the synchronous shaft (22).

7. The intermediate roll shifting device for a six-high rolling mill according to claim 6, characterized in that The two sides of the upper intermediate roller bearing seat assembly (7) or the lower intermediate roller bearing seat assembly (8) near the intermediate roller shifting mechanism (10) are respectively connected with a connecting block (18), a pin hole is formed in each connecting block (18), a locking hydraulic cylinder (17) matched with the pin hole is arranged on each locking pin block (16), and the cylinder rod (19) of the matched locking hydraulic cylinder (17) is movably arranged in the corresponding pin hole.

8. The intermediate roll shifting device for a six-high rolling mill according to claim 7, characterized in that, One of the locking pin blocks (16) is provided with a displacement sensor (11).

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