Intermediate roll shifting device for six-roll mill and intermediate roll shifting method

Abstract

The invention discloses an intermediate roll shifting device for a six-roll mill, two ends of an upper intermediate roll and two ends of a lower intermediate roll are respectively and fixedly arranged in intermediate roll bearing seat assemblies 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. The invention further discloses a method for shifting the intermediate roll by using the intermediate roll shifting device. According to the intermediate roll shifting device for the six-high rolling mill, the intermediate roll shifting action can be completed only by driving the intermediate roll assembly through the intermediate roll shifting mechanism, rolling 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] The invention belongs to the technical field of metallurgical engineering equipment, relates to an intermediate roll shifting device for a six-roller rolling mill, and also relates to a method for shifting the intermediate rolls by using the intermediate roll shifting device. Background Art

[0002] At present, six-roller cold rolling mills are widely used in cold-rolled strip production. That is, a set of intermediate rolls is added between the working rolls and the support rolls of the original four-roller rolling mill. The intermediate rolls can move axially left and right, and cooperate with the positive and negative hydraulic bending rolls of the working rolls to reduce or improve the harmful bending moment between the rolls to improve the cold rolling mill's ability to adjust the plate shape during the strip rolling process, thereby improving the plate shape quality of the cold-rolled strip, controlling the straightness of the strip, improving the control of the convexity and straightness of the plate in automated rolling, reducing the thinning of the edge of the strip, and improving the quality of the finished strip, so as to meet the market's demand for high-end plates.

[0003] At present, most six-roller rolling mills on the market use hydraulic cylinders to push the intermediate roll transverse movement structure to complete the shifting of the intermediate roll. This roll shifting structure pushes the intermediate roll bending block through the roll shifting mechanism, thereby driving the intermediate roll assembly to shift axially. This structure is complex and has many sliding surfaces, which places high requirements on the processing accuracy of related parts such as the sliding surface of the rolling mill frame and its slide plate, the bending roll block and its matching slide plate, etc. The assembly grinder requires high precision, has many processed parts, and is troublesome to operate. In addition, the piping on the bending roll block mostly uses hoses for easy movement, resulting in many connection ports and leakage points, which is not conducive to the user's subsequent equipment maintenance. Summary of the invention

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

[0005] The second object of the present invention is a method for shifting an intermediate roller using the intermediate roller shifting device.

[0006] The first technical solution adopted by the present invention is that the intermediate roll shifting device for a six-high rolling mill includes a frame, on which an upper support roll, an upper intermediate roll, an upper working roll, a lower working roll, a lower intermediate roll and a lower support roll are arranged in sequence from top to bottom, and both ends of the upper intermediate roll and the lower intermediate roll are respectively fixed in the intermediate roll bearing seat assembly on the frame, and also includes 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 intermediate roller shifting mechanism comprises a shifting roller driving device, both ends of which are respectively connected with locking pin blocks, and the two locking pin blocks are respectively assembled and detachably connected with the corresponding intermediate roller bearing seats.

[0007] The present invention is also characterized in that: Two upper intermediate roller bearing seat assemblies and two lower intermediate roller bearing seat assemblies are respectively provided on the frame. The two upper intermediate roller bearing seat assemblies are respectively connected to the two ends of the upper intermediate roller, and the two lower intermediate roller bearing seat assemblies are respectively connected to the two ends of the lower intermediate roller. The two intermediate roller shifting mechanisms are respectively connected to the upper intermediate roller bearing seat assembly or the lower intermediate roller bearing seat assembly on the transmission side. Bending roll blocks are respectively arranged on both sides of each intermediate roll bearing seat assembly, a bending roll block slide is arranged on the side of each bending roll block close to the upper intermediate roll bearing seat assembly, an intermediate roll bearing seat slide is arranged on the side of the upper intermediate roll bearing seat assembly close to the bending roll block, and a gap is provided between the intermediate roll bearing seat slide and the bending roll block slide.

[0008] The specific structure of the two lower intermediate roller bearing seat assemblies is the same as that of the upper intermediate roller bearing seat assemblies.

[0009] The intermediate roller shifting mechanism comprises a first connecting frame and a second connecting frame arranged on the frame, the first connecting frame and the second connecting frame are arranged in parallel, the first connecting frame and the second connecting frame are connected by a connecting beam, and a roller shifting driving device is also arranged between the first connecting frame and the second connecting frame; The two locking pin blocks are slidably arranged on the first connecting frame and the second connecting frame respectively.

[0010] The roller shifting driving device comprises a main reduction box and a slave reduction box, wherein the main reduction box is arranged on the second connecting frame, and the slave reduction box is arranged on the first connecting frame. A hydraulic motor is arranged on the main reduction box, and the output shaft of the hydraulic motor is connected to a first worm gear. A second worm gear is arranged in the slave reduction box, and the first worm gear and the second worm gear are connected via a synchronous shaft. A first worm wheel meshing with the first worm is provided in the main reduction box, the rotating shaft of the first worm wheel horizontally penetrates the main reduction box and is connected to the first gear, a second gear meshing with the first gear is rotatably provided on the second connecting frame, a first screw rod is connected to the central axis of the second gear, and an end of the first screw rod away from the second gear is connected to the corresponding locking pin block through a copper nut; A second worm wheel meshing with the second worm is provided in the reduction box, the rotating shaft of the second worm wheel horizontally passes through the reduction box and is connected to a third gear, a fourth gear meshing with the third gear is provided on the first connecting frame, a second screw rod is connected to the central axis of the fourth gear, and an end of the second screw rod away from the fourth gear is connected to a corresponding locking pin block through a copper nut; The first gear and the third gear have the same specifications, and the second gear and the fourth gear have the same specifications.

[0011] One end of the first worm gear away from the hydraulic motor passes through the main reduction box and is connected to the first end of the synchronous shaft, and the second worm gear passes through the secondary reduction box and is connected to the second end of the synchronous shaft.

[0012] The upper intermediate roller bearing seat assembly or the two sides of the lower intermediate roller bearing seat assembly close to the intermediate roller shifting mechanism are respectively connected with connecting blocks, each connecting block is provided with a pin hole, each locking pin block is provided with a locking hydraulic cylinder matched with the pin hole, and the cylinder rod of the matched locking hydraulic cylinder is movably arranged in the corresponding pin hole.

[0013] A displacement sensor is provided on one of the locking pin blocks.

[0014] The second technical solution adopted by the present invention is a method for shifting the intermediate rolls, using the above-mentioned intermediate roll shifting device for the six-high rolling mill, which is specifically as follows: When the intermediate roller needs to be shifted, the locking pin block is hydraulically driven to extend the cylinder rod of the locking hydraulic cylinder into the pin hole of the corresponding connecting block, so that the locking pin block and the intermediate roller bearing seat assembly are connected as a whole; the hydraulic motor is started, and the hydraulic motor drives the first worm and the first worm wheel to rotate, and the first gear and the second gear rotate accordingly, thereby driving the first screw to move axially. At the same time, the first worm drives the second worm and the second worm wheel to rotate through the synchronous shaft, and the third gear and the fourth gear rotate accordingly, driving the second screw to move axially. The first screw and the second screw drive the corresponding locking pin blocks to move axially at the same time, and the locking pin block transmits force to the intermediate roller bearing seat assembly, thereby driving the intermediate roller bearing seat assembly to move axially and complete the intermediate roller movement.

[0015] The beneficial effects of the present invention are: (1) The intermediate roll shifting device for a six-high rolling mill provided by the present invention has a simple structure, is convenient and practical, and can complete the intermediate roll shifting action by only driving the intermediate roll bearing assembly itself through the intermediate roll shifting mechanism, thereby ensuring the purpose of controlling the rolling plate shape; (2) The intermediate roll shifting device for a six-roll rolling mill provided by the present invention is easy to operate, has fewer processing and assembly parts, and has low processing and assembly costs. The bending roll block does not move, so that the bending roll block piping can be welded with steel pipes, reducing the interfaces between pipe fittings, thereby reducing the risk of leakage points. Subsequent operation and maintenance are simple and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the six-roller rolling mill device of the present invention; Figure 2 It is a schematic diagram of the overall structure of the intermediate rolls and the intermediate roll shifting device of the six-roller rolling mill of the present invention; Figure 3 It is a schematic structural diagram of the intermediate roll shifting device of the six-roller rolling mill of the present invention; Figure 4 It is a structural schematic diagram of the roller shifting driving device of the present invention; Figure 5 It is a schematic diagram of the structure inside the main reduction box in the roller shifting driving device of the present invention; Figure 6It is a schematic diagram of the structure of the reduction box in the roller shifting driving device of the present invention; Figure 7 It is a top view of the locking pin block structure of the present invention.

[0017] In the figure, 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 seat assembly, 8. lower intermediate roller bearing seat assembly, 9. intermediate roller bearing seat 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 box, 22. synchronous shaft, 23. slave reduction box, 24. first worm, 25. first worm wheel, 26. first screw, 27. first gear, 28. second gear, 29. second worm, 30. second worm wheel, 31. copper nut, 32. bending roller block, 33. bending roller block slide plate. DETAILED DESCRIPTION

[0018] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Intermediate roll shifting device for six-high rolling mill, such as Figure 1 As shown, the frame is provided with an upper support roll 1, an upper intermediate roll 5, an upper working roll 3, a lower working roll 4, a lower intermediate roll 6 and a lower support roll 2 in sequence from top to bottom. The support rolls prevent the working rolls from bending. The ends of the upper intermediate roll 5 and the lower intermediate roll 6 are respectively fixed in the intermediate roll bearing seat assembly on the frame. The specific structure is as follows: two upper intermediate roll bearing seat assemblies 7 and two lower intermediate roll bearing seat assemblies 8 are respectively provided on the frame. The two upper intermediate roll bearing seat assemblies 7 are respectively connected to the two ends of the upper intermediate roll 5, and the two lower intermediate roll bearing seat assemblies 8 are respectively connected to the two ends of the lower intermediate roll 6. The two intermediate roll shifting mechanisms 10 are respectively connected to the upper intermediate roll bearing seat assembly 7 or the lower intermediate roll bearing seat assembly 8 on the transmission side. Each intermediate roller bearing seat assembly 7 is provided with a bending roller block 32 on both sides, and each bending roller block 32 is provided with a bending roller block slide 33 on one side close to the upper intermediate roller bearing seat assembly 7. An intermediate roller bearing seat slide 9 is provided on one side close to the bending roller block 32 of the upper intermediate roller bearing seat assembly 7, and there is a gap between the intermediate roller bearing seat slide 9 and the bending roller block slide 33. The specific structure of the two lower intermediate roller bearing seat assemblies 8 is the same as that of the upper intermediate roller bearing seat assembly 7, and will not be elaborated in detail here.

[0020] Slide plates are installed on both sides of the upper intermediate roller bearing seat assembly 7 and the lower intermediate roller bearing seat assembly 8 and the corresponding bending roll block sliding surface. When the upper and lower intermediate rollers need to be shifted, the two slide plates can be easily shifted through a suitable gap. During the whole process, only the intermediate roller bearing seat assembly drives the intermediate roller to move axially, and the bending roll block does not need to move. Therefore, the bending roll block piping can be welded with steel pipes to reduce the interface between pipe fittings, thereby reducing the risk of leakage points, and the subsequent operation and maintenance are simple and easy to promote.

[0021] 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 corresponding intermediate roller shifting mechanisms 10 respectively. When 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 the intermediate roller shifting action can be completed.

[0022] Each intermediate roller shifting mechanism 10 comprises a roller shifting driving device 15, both ends of which are respectively connected with locking pin blocks 16, and the two locking pin blocks 16 are respectively assembled and detachably connected with the corresponding intermediate roller bearing seats.

[0023] Specifically, Figure 3 As shown, the intermediate roller shifting mechanism 10 includes a first connecting frame 12 and a second connecting frame 13 arranged on a 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, and a roller shifting driving device 15 is arranged between the first connecting frame 12 and the second connecting frame 13; The two locking pin blocks 16 are slidably arranged on the first connecting frame 12 and the second connecting frame 13 respectively. Specifically, slide grooves are respectively arranged on the first connecting frame 12 and the second connecting frame 13, and slide bars are arranged on the two locking pin blocks 16. The slide bars can be slidably arranged in the corresponding slide grooves.

[0024] like Figures 4 to 6 As shown, the roller drive device 15 includes a main reduction box 21 and a slave reduction box 23. The main reduction box 21 is arranged on the second connecting frame 13, and the slave reduction box 23 is arranged on the first connecting frame 12. A hydraulic motor 20 is provided on the main reduction box 21. The output shaft of the hydraulic motor 20 is connected to a first worm 24. A second worm 29 is provided in the slave reduction box 23. The first worm 24 and the second worm 29 are connected by a synchronous shaft 22. The specific structure is: the end of the first worm 24 away from the hydraulic motor 20 horizontally penetrates the main reduction box 21 and is connected to the first end of the synchronous shaft 22, and the second worm 29 horizontally penetrates the second end of the slave reduction box 23 connected to the synchronous shaft 22, wherein the synchronous shaft 22 and the first worm 24 and the second worm 29 can be connected to each other through a universal shaft. This is a mature technology and will not be described in detail here.

[0025] A first worm wheel 25 meshing with the first worm 24 is provided in the main reduction box 21, and a rotating shaft of the first worm wheel 25 horizontally penetrates the main reduction box 21 and is connected to a first gear 27, a second gear 28 meshing with the first gear 27 is rotatably provided on the second connecting frame 13, a first screw rod 26 is connected to the central axis of the second gear 28, and an end of the first screw rod 26 away from the second gear 28 is connected to the corresponding locking pin block 16 through a copper nut 31; A second worm gear 30 meshing with the second worm 29 is provided in the reduction box 23, the shaft of the second worm gear 30 horizontally passes through the reduction box 23 and is connected to a third gear, a fourth gear meshing with the third gear is provided on the first connecting frame 12, a second screw rod is connected to the central axis of the fourth gear, and an end of the second screw rod away from the fourth gear is connected to the corresponding locking pin block 16 through a copper nut 31; 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.

[0026] When in use, the shifting roller driving device 15 is driven by the hydraulic motor 20 to rotate the first worm 24 in the main reduction box 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 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 screw to move axially. When the screw moves axially, it pushes the locking pin block to move axially at the same time.

[0027] The upper intermediate roller bearing seat assembly 7 or the lower intermediate roller bearing seat assembly 8 on one side of the intermediate roller shifting mechanism 10 is respectively connected with a connecting block 18, each connecting block 18 is provided with a pin hole, and each locking pin block 16 is provided with a locking hydraulic cylinder 17 matched with the corresponding pin hole. Figure 7 As shown, the cylinder rod 19 of each locking hydraulic cylinder 17 is movably arranged in the corresponding pin hole.

[0028] Furthermore, a displacement sensor 11 is provided on one of the locking pin blocks 16. When the intermediate roller starts to shift, the displacement sensor 11 sends a signal. The purpose of automatic control of the shifting of the intermediate roller is achieved by electrically controlling the displacement of the displacement sensor 11.

[0029] Working method: When the intermediate roll needs to be shifted, the locking pin blocks 16 on both sides of the rolling mill are driven by hydraulic pressure, so that the cylinder rod 19 of the built-in locking hydraulic cylinder 17 extends into the pin hole of the corresponding connecting block 18, so that the locking pin block 16 and the intermediate roll are assembled and connected into 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; Start the hydraulic motor 20, which drives the first worm 24 in the main reduction box 21 to rotate, and 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 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, and 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 screw 26 to move axially. The first screw 26 and the second screw simultaneously drive the corresponding locking pin block 16 to move axially, and the locking pin block 16 transmits force to the intermediate roller bearing seat assembly, thereby driving the intermediate roller bearing seat assembly to move axially and complete the movement of the intermediate roller. Copper slide plates are installed on both sides of the upper and lower intermediate roller bearing seats and the corresponding sliding surfaces of the bending roller blocks. When the upper and lower intermediate rollers need to move, the two slide plates can be easily moved through a suitable gap.

[0030] At the same time, in order to ensure the automatic control of the rolling mill, a displacement sensor is installed on one side of the intermediate roll shifting device. When the intermediate roll starts to shift, the displacement sensor sends a signal, and the automatic control of the intermediate roll shifting is achieved through electrical displacement control of the displacement sensor. The nut and screw structure can be used to accurately and smoothly shift the roll, and the automatic control of the roll shifting is realized, which solves the problem of thinning of the edge during strip rolling and effectively improves the straightness of the plate and strip.

[0031] Example 1 Intermediate roll shifting device for six-high rolling mill, such as Figure 1 As shown, the frame is provided with an upper support roll 1, an upper intermediate roll 5, an upper working roll 3, a lower working roll 4, a lower intermediate roll 6 and a lower support roll 2 in order from top to bottom. The support rolls prevent the working rolls from bending. Both ends of the upper intermediate roll 5 and the lower intermediate roll 6 are respectively fixed in the intermediate roll bearing seat assembly on the frame. The frame also includes two intermediate roll shifting mechanisms 10. The upper intermediate roll 5 and the lower intermediate roll 6 are respectively driven by the intermediate roll shifting mechanisms 10. Each intermediate roller shifting mechanism 10 comprises a roller shifting driving device 15, both ends of which are respectively connected with locking pin blocks 16, and the two locking pin blocks 16 are respectively assembled and detachably connected with the corresponding intermediate roller bearing seats.

[0032] Example 2 Intermediate roll shifting device for six-high rolling mill, such as Figure 1As shown, the frame is provided with an upper support roll 1, an upper intermediate roll 5, an upper working roll 3, a lower working roll 4, a lower intermediate roll 6 and a lower support roll 2 in sequence from top to bottom. The support rolls prevent the working rolls from bending. The ends of the upper intermediate roll 5 and the lower intermediate roll 6 are respectively fixed in the intermediate roll bearing seat assembly on the frame. The specific structure is as follows: two upper intermediate roll bearing seat assemblies 7 and two lower intermediate roll bearing seat assemblies 8 are respectively provided on the frame. The two upper intermediate roll bearing seat assemblies 7 are respectively connected to the two ends of the upper intermediate roll 5, and the two lower intermediate roll bearing seat assemblies 8 are respectively connected to the two ends of the lower intermediate roll 6. The two intermediate roll shifting mechanisms 10 are respectively connected to the upper intermediate roll bearing seat assembly 7 or the lower intermediate roll bearing seat assembly 8 on the transmission side. Each intermediate roller shifting mechanism 10 comprises a roller shifting driving device 15, both ends of which are respectively connected with locking pin blocks 16, and the two locking pin blocks 16 are respectively assembled and detachably connected with the corresponding intermediate roller bearing seats.

[0033] Example 3 Intermediate roll shifting device for six-high rolling mill, such as Figure 1 As shown, the frame is provided with an upper support roll 1, an upper intermediate roll 5, an upper working roll 3, a lower working roll 4, a lower intermediate roll 6 and a lower support roll 2 in order from top to bottom. The support rolls prevent the working rolls from bending. Both ends of the upper intermediate roll 5 and the lower intermediate roll 6 are respectively fixed in the intermediate roll bearing seat assembly on the frame. The frame also includes two intermediate roll shifting mechanisms 10. The upper intermediate roll 5 and the lower intermediate roll 6 are respectively driven by the intermediate roll shifting mechanisms 10. Each intermediate roller shifting mechanism 10 comprises a roller shifting driving device 15, both ends of which are respectively connected with locking pin blocks 16, and the two locking pin blocks 16 are respectively assembled and detachably connected with the corresponding intermediate roller bearing seats.

[0034] Specifically, Figure 3 As shown, the intermediate roller shifting mechanism 10 includes a first connecting frame 12 and a second connecting frame 13 arranged 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, and a roller shifting driving device 15 is commonly arranged between the first connecting frame 12 and the second connecting frame 13.

[0035] The two locking pin blocks 16 are slidably arranged on the first connecting frame 12 and the second connecting frame 13 respectively. Specifically, slide grooves are respectively arranged on the first connecting frame 12 and the second connecting frame 13, and slide bars are arranged on the two locking pin blocks 16. The slide bars can be slidably arranged in the corresponding slide grooves.

[0036] Example 4 The specific structure of the roller shifting driving device 15 is further defined on the basis of Example 4, such as Figures 4 to 6As shown, the roller drive device 15 includes a main reduction box 21 and a slave reduction box 23. The main reduction box 21 is arranged on the second connecting frame 13, and the slave reduction box 23 is arranged on the first connecting frame 12. A hydraulic motor 20 is provided on the main reduction box 21. The output shaft of the hydraulic motor 20 is connected to a first worm 24. A second worm 29 is provided in the slave reduction box 23. The first worm 24 and the second worm 29 are connected by a synchronous shaft 22. The specific structure is: the end of the first worm 24 away from the hydraulic motor 20 horizontally penetrates the main reduction box 21 and is connected to the first end of the synchronous shaft 22, and the second worm 29 horizontally penetrates the second end of the slave reduction box 23 connected to the synchronous shaft 22, wherein the synchronous shaft 22 and the first worm 24 and the second worm 29 can be connected to each other through a universal shaft. This is a mature technology and will not be described in detail here.

[0037] A first worm wheel 25 meshing with the first worm 24 is provided in the main reduction box 21, and a rotating shaft of the first worm wheel 25 horizontally penetrates the main reduction box 21 and is connected to a first gear 27, a second gear 28 meshing with the first gear 27 is rotatably provided on the second connecting frame 13, a first screw rod 26 is connected to the central axis of the second gear 28, and an end of the first screw rod 26 away from the second gear 28 is connected to the corresponding locking pin block 16 through a copper nut 31; A second worm gear 30 meshing with the second worm 29 is provided in the reduction box 23, the shaft of the second worm gear 30 horizontally passes through the reduction box 23 and is connected to a third gear, a fourth gear meshing with the third gear is provided on the first connecting frame 12, a second screw rod is connected to the central axis of the fourth gear, and an end of the second screw rod away from the fourth gear is connected to the corresponding locking pin block 16 through a copper nut 31; 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.

[0038] Example 5 To ensure the automated control of the rolling mill, on the basis of Example 4, a displacement sensor is provided on one side of the intermediate roll shifting device. When the intermediate roll starts to shift, the displacement sensor sends a signal, and the automated control of the intermediate roll shifting is achieved by electrically controlling the displacement of the displacement sensor. This achieves the goal of accurately and smoothly shifting the roll by utilizing the nut and screw structure, while also realizing automated control of the roll shifting, solving the problem of edge thinning during strip rolling and effectively improving the flatness of the plate and strip.

[0039] Example 6 Working method: When the intermediate roll needs to be shifted, the locking pin blocks 16 on both sides of the rolling mill are driven by hydraulic pressure, so that the cylinder rod 19 of the built-in locking hydraulic cylinder 17 extends into the pin hole of the corresponding connecting block 18, so that the locking pin block 16 and the intermediate roll are assembled and connected into 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; Start the hydraulic motor 20, which drives the first worm 24 in the main reduction box 21 to rotate, and 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 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, and 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 screw 26 to move axially. The first screw 26 and the second screw simultaneously drive the corresponding locking pin block 16 to move axially, and the locking pin block 16 transmits force to the intermediate roller bearing seat assembly, thereby driving the intermediate roller bearing seat assembly to move axially and complete the movement of the intermediate roller. Copper slide plates are installed on both sides of the upper and lower intermediate roller bearing seats and the corresponding sliding surfaces of the bending roller blocks. When the upper and lower intermediate rollers need to move, the two slide plates can be easily moved through a suitable gap.

Claims

1. An intermediate roll shifting device for a six-high rolling mill, comprising a frame, wherein an upper support roll (1), an upper intermediate roll (5), an upper working roll (3), a lower working roll (4), a lower intermediate roll (6) and a lower support roll (2) are arranged in sequence from top to bottom on the frame, characterized in that: The ends of the upper intermediate roller (5) and the lower intermediate roller (6) are respectively fixedly arranged in the intermediate roller bearing seat assembly on the frame, and also include two intermediate roller shifting mechanisms (10), and the upper intermediate roller (5) and the lower intermediate roller (6) are respectively driven by the intermediate roller shifting mechanisms (10); Each intermediate roller shifting mechanism (10) comprises a roller shifting driving device (15), and locking pin blocks (16) are respectively connected to both ends of the roller shifting driving device (15), and the two locking pin blocks (16) are respectively assembled and detachably connected to the corresponding intermediate roller bearing seats.

2. The intermediate roll shifting device for a six-high rolling mill according to claim 1, characterized in that: 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), the two lower intermediate roller bearing seat assemblies (8) are respectively connected to the two ends of the lower intermediate roller (6), and 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; Each intermediate roller bearing seat assembly (7) is provided with a bending roller block (32) on both sides, and each bending roller block (32) is provided with a bending roller block slide plate (33) on the side close to the upper intermediate roller bearing seat assembly (7). An intermediate roller bearing seat slide plate (9) is provided on the side close to the bending roller block (32) of the upper intermediate roller bearing seat assembly (7), and a gap is provided between the intermediate roller bearing seat slide plate (9) and the bending roller block slide plate (33).

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

4. The intermediate roll shifting device for a six-high rolling mill according to claim 1, characterized in that: The intermediate roller shifting mechanism (10) comprises a first connecting frame (12) and a second connecting frame (13) arranged on a frame, the first connecting frame (12) and the second connecting frame (13) being arranged in parallel, the first connecting frame (12) and the second connecting frame (13) being connected via a connecting beam (14), and a roller shifting driving device (15) being arranged between the first connecting frame (12) and the second connecting frame (13); The two locking pin blocks (16) are slidably arranged on the first connecting frame (12) and the second connecting frame (13), respectively.

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

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

7. The intermediate roll shifting device for a six-high rolling mill according to claim 5, characterized in that: Connecting blocks (18) are respectively connected to both sides of the upper intermediate roller bearing seat assembly (7) or the lower intermediate roller bearing seat assembly (8) on one side close to the intermediate roller shifting mechanism (10), each of the connecting blocks (18) is provided with a pin hole, and each of the locking pin blocks (16) is provided with a locking hydraulic cylinder (17) matched with the pin hole, 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 5, characterized in that: A displacement sensor (11) is provided on one of the locking pin blocks (16).

9. A method for shifting the intermediate roll, characterized in that: The intermediate roll shifting device for a six-high rolling mill according to any one of claims 1 to 8 is specifically as follows: When the intermediate roller needs to be shifted, the locking pin block (16) is driven by hydraulic pressure to extend the cylinder rod of the locking hydraulic cylinder (17) into the pin hole of the corresponding connecting block (18), so that the locking pin block (16) and the intermediate roller bearing seat assembly are connected to form a whole; the hydraulic motor (20) is started, and the hydraulic motor (20) drives the first worm (24) and the first worm wheel (25) to rotate, and the first gear (27) and the second gear (28) rotate accordingly, thereby driving the first screw (26) to move axially. At the same time, the first worm (24) drives the second worm (29) and the second worm wheel (30) to rotate through the synchronous shaft (22), and the third gear and the fourth gear rotate accordingly, driving the second screw to move axially. The first screw (26) and the second screw drive the corresponding locking pin block (16) to move axially at the same time. The locking pin block (16) transmits force to the intermediate roller bearing seat assembly, thereby driving the intermediate roller bearing seat assembly to move axially, completing the shifting of the intermediate roller.

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