Rolling mill

Abstract

The utility model relates to a rolling mill, and belongs to the field of metal hot rolling equipment, the rolling mill comprises a frame body, the frame body is connected with two opposite and parallel working rollers, back-up rollers abut against the opposite sides of the two working rollers, and the two opposite sides of the frame body are connected with guide assemblies; the guiding assembly is used for guiding the steel billet to the direction perpendicular to the working rollers. The steel billet rolling device has the effect of achieving accurate rolling of steel billets.

Description

Technical Field

[0001] This application relates to the field of hot rolling equipment for metals, and more particularly to a rolling mill. Background Art

[0002] In the hot rolling process of metal, the steel billet needs to be heated first. After heating is completed, the steel billet is guided to the rolling mill, where it is rolled into flat steel by two relatively rotating work rolls.

[0003] During the transport of steel billets, multiple rotating rollers are often installed on the underside of the billet. The rotation of the rollers drives the billet to move, thereby transporting the billet to the position between two work rollers for rolling.

[0004] Because the billet deforms during the rolling process, the end of the billet closest to the work roll will tilt during the transport of the billet by the rotating rolls. As a result, the front end of the billet does not enter between the two work rolls at the same time during the rolling process. Instead, a corner of the front end of the billet enters between the two work rolls in advance, resulting in a large unusable part of the flat steel rolled from the front end of the billet, which leads to a waste of resources. Utility Model Content

[0005] In order to achieve accurate rolling of steel billets, this application provides a rolling mill.

[0006] The rolling mill provided in this application adopts the following technical solution:

[0007] A rolling mill includes a frame with two opposing and parallel work rolls connected to it. Support rolls abut against the opposite sides of the two work rolls. Guide assemblies are connected to opposite sides of the frame, and the guide assemblies are used to guide steel billets to a direction perpendicular to the work rolls.

[0008] By adopting the above technical solution, during the process of the billet moving towards the work roll, the guiding component guides the billet to a position perpendicular to the work roll and enters or exits between the two work rolls. This reduces the phenomenon that the work rolls may deviate from the rolling effect of the billet due to the billet entering between the two work rolls at an incline, thus affecting the rolling effect of the billet.

[0009] Optionally, the guiding assembly includes two opposing guide plates, which are inclined at different angles from the side closest to the adjacent work roller to the side furthest from the work roller.

[0010] By adopting the above technical solution and setting two guide plates, the billet can adjust its position by contacting the guide plates when it shifts in the horizontal direction.

[0011] Optionally, each guide plate is fixedly connected to a connecting plate on the side near the working roller. Each connecting plate has an elongated hole in a direction parallel to the length direction of the working roller. Each connecting plate is connected to the frame by bolts set inside the elongated hole.

[0012] By adopting the above technical solution, when it is necessary to adjust the relative position of the two guide plates, the bolts connecting the connecting plate and the frame are loosened, and then the connecting plate and the guide plate are moved along the length of the long hole, thereby adjusting the distance between the two guide plates. This reduces the phenomenon that the two guide plates cannot adjust the position of the steel billet when the size of the rolled steel billet changes.

[0013] Optionally, each of the guide plates is equipped with a plurality of guide rollers for contacting the billet.

[0014] By adopting the above technical solution, the wear on the sidewall of the steel billet is reduced during the process of adjusting the angle by contacting the guide plate.

[0015] Optionally, a guard plate is provided on the upper side of the two guide plates. The guard plate is connected to the frame and is inclined from top to bottom towards the adjacent work roller. A horizontally arranged limiting plate is provided on the lower side of the guard plate.

[0016] By adopting the above technical solution, the guard plate and the limiting plate can work together to adjust the position of the billet, reducing the phenomenon that the billet is difficult to enter between the two working rolls when it tilts in the vertical direction.

[0017] Optionally, the upper support roller is connected to the adjacent working roller, and the support roller is connected to a lifting hydraulic cylinder for driving the support roller and the connected working roller to move up and down. The guard plate is fixedly connected to a movable plate, and the movable plate has multiple movable holes in the vertical direction. The movable plate is connected to the frame by bolts inserted into the multiple movable holes.

[0018] By adopting the above technical solution, when it is necessary to adjust the distance between the two working rolls according to the size of the billet, the lifting hydraulic cylinder is controlled to drive the connected support roll to move. During the movement of the support roll, the connected working roll is driven to move, thereby realizing the adjustment of the relative position between the two working rolls. Furthermore, due to the presence of the moving plate and the moving hole on the moving plate, the guard plate can be adjusted according to the distance between the two working rolls, thereby reducing the phenomenon that the guard plate and the limiting plate have difficulty guiding the billet to move into the interior of the two working rolls when the size of the billet changes.

[0019] Optionally, two adjacent guide plates and guard plates are connected to the same linkage component, which is used to drive the two connected guide plates and guard plates to move simultaneously.

[0020] By adopting the above technical solution and setting up the guide and guard components, the phenomenon that the space enclosed by the two guide plates, the limiting plate and the guard plate does not correspond to the middle part of the two working rollers due to the movement deviation during the movement of the guide plate and the guard plate is reduced.

[0021] Optionally, each connecting plate has a connecting rod fixedly connected to the side away from the connected guide plate. Two connecting rods are threaded through and connected to a double-acting screw. A driving bevel gear is fixedly sleeved on the double-acting screw. The driving bevel gear meshes with a driven bevel gear. The driven bevel gear is fixedly connected to a vertically arranged linkage screw. The linkage screw is connected to the moving plate and is used to drive the moving plate to move.

[0022] By adopting the above technical solution, when it is necessary to adjust the two guide plates and the guard plate at the same time, the double-acting screw is rotated. During the rotation of the double-acting screw, the two connecting rods and the guide plates connected to the connecting rods are moved. During the rotation of the double-acting screw, the driving bevel gear and the driven bevel gear are rotated. During the rotation of the driven bevel gear, the connecting plate and the guard plate are moved, thereby realizing the adjustment process of the position of the two guide plates and the guard plate.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By setting guide plates, guard plates, and limit plates, the position of the billet entering between the two work rolls and moving out from between the two work rolls can be restricted, thereby improving the accuracy of billet rolling;

[0025] 2. By setting guide rollers, the wear on the sidewalls of the billet is reduced during the process of guiding the billet through the guide plate;

[0026] 3. By setting up linkage components, the phenomenon that the billet is difficult to move to the middle position of the two work rolls due to the difference in the movement process of the guide plate and guard plate is reduced. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0028] Figure 2 This is a cross-sectional view of the overall structure of an embodiment of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Column; 12. Horizontal plate; 2. Working roller; 21. Moving block; 3. Support roller; 31. Support block; 32. Connecting frame; 4. Lifting hydraulic cylinder; 5. Driving component; 6. Guide assembly; 61. Guide plate; 611. Guide roller; 62. Guard plate; 63. Limiting plate; 64. Connecting plate; 641. Long hole; 65. Fixed plate; 66. Moving plate; 661. Moving hole; 7. Linkage assembly; 71. Connecting rod; 72. Bidirectional lead screw; 73. Driving bevel gear; 74. Driven bevel gear; 75. Linkage lead screw; 76. Connecting plate. DETAILED DESCRIPTION

[0030] The following is in conjunction with the appendix Figure 1 - Appendix Figure 2 This application will be described in further detail.

[0031] This application discloses a rolling mill, with reference to... Figure 1 and Figure 2 The system includes a frame 1, which includes two opposing uprights 11, each upright 11 being vertically arranged, and a horizontal plate 12 being provided at the upper end of the two uprights 11. The horizontal plate 12 is fixedly connected to the two uprights 11.

[0032] Two horizontally arranged working rollers 2 are provided between the two columns 11. The end of each working roller 2 faces one of the columns 11 and is rotatably connected to a moving block 21. Each moving block 21 is inserted into the interior of the adjacent column 11. The two moving blocks 21 connected to the lower working roller 2 are fixedly connected to the adjacent column 11, and the two moving blocks 21 connected to the upper working roller 2 slide and abut against the adjacent column 11 in the vertical direction.

[0033] Support rollers 3 are provided on the opposite sides of the two working rollers 2. Each support roller 3 is arranged parallel to and abuts against the adjacent working roller 2. The end of each support roller 3 is positioned towards one of the columns 11 and is rotatably connected to a support block 31. Each support block 31 is inserted into the interior of the adjacent column 11. The two support blocks 31 connected to the lower support roller 3 are fixedly connected to the adjacent column 11. The two support blocks 31 connected to the upper support roller 3 are slidably connected to the adjacent column 11 in the vertical direction and connected to the adjacent movable block 21.

[0034] The upper support roller 3 is connected to two support blocks 31, and the upper side of these blocks is fixedly connected to the same connecting frame 32, which is horizontally arranged. Multiple lifting hydraulic cylinders 4 are provided between the connecting frame 32 and the horizontal plate 12. In this embodiment, two lifting hydraulic cylinders 4 are provided, both vertically downwards and spaced apart from each other. The cylinder body of each lifting hydraulic cylinder 4 is fixedly connected to the side of the horizontal plate 12 closest to the connecting frame 32, and the piston rod of each lifting hydraulic cylinder 4 is fixedly connected to the side of the connecting frame 32 away from the connected support roller 3.

[0035] Both working rollers 2 have the same end facing through the connected moving block 21 and the side wall of the column 11 and are connected to a driving component 5. The two driving components 5 are used to drive the two connected working rollers 2 to rotate relative to each other. The driving component 5 is generally a combination of a motor and a reducer. Since this component is prior art and is not the subject of this invention, it is not shown in the figure.

[0036] The work roll 2 has guide components 6 on both sides, which are used to guide the billet to move in a direction perpendicular to the work roll 2.

[0037] When it is necessary to roll the steel billet, firstly, the two lifting hydraulic cylinders 4 are activated to move the connected support rollers 3 and work rollers 2, thereby adjusting the distance between the two work rollers 2. Then, the steel billet is guided to one side of the two work rollers 2, and the guide assembly 6 adjusts the steel billet to a position perpendicular to the work rollers 2, so that the guide assembly 6 can drive the steel billet to move in a direction perpendicular to the work rollers 2 to the position between the two steel billets, thereby achieving accurate rolling of the steel billet.

[0038] The guide assembly 6 includes two guide plates 61 arranged opposite to each other. Each guide plate 61 is located between the two work rollers 2, and each guide plate 61 is gradually inclined from the side closer to the work roller 2 to the side further away from the work roller 2 and further away from the other adjacent guide plate 61.

[0039] A guard plate 62 is also provided on the upper side of the two guide plates 61. The guard plate 62 is set horizontally in the length direction and gradually tilts towards the side closer to the adjacent work roller 2 from top to bottom.

[0040] The lower side of the two guide plates 61 is provided with a limiting plate 63 that is opposite to the guard plate 62. The limiting plate 63 is horizontally arranged and fixedly connected to the adjacent column 11.

[0041] In actual use, the two guide plates 61, the guard plate 62 and the limiting plate 63 can restrict the position of the billet entering or leaving the space between the two work rolls 2. On the one hand, the two work rolls 2 can accurately roll the billet, and on the other hand, the billet can accurately enter the subsequent rolling mill for rolling operation.

[0042] Each guide plate 61 is equipped with multiple vertically arranged guide rollers 611, and each guide roller 611 can abut against the steel billet that has moved between two adjacent guide plates 61.

[0043] By setting guide rollers 611, the billet can be guided vertically to a position between the two work rollers 2 when it deviates. This achieves the protection of the billet.

[0044] Each guide plate 61 is fixedly connected to a connecting plate 64 on the side closest to the adjacent work roller 2. Each connecting plate 64 has a horizontally oriented elongated hole 641. A bolt is inserted into each elongated hole 641, and a fixing plate 65 is threaded to one end of each bolt passing through the elongated hole 641. Each fixing plate 65 is horizontally positioned and fixedly connected to the adjacent column 11, and each fixing plate 65 abuts against the connected connecting plate 64. Furthermore, each connecting plate 64 slides against the adjacent limiting plate 63.

[0045] A movable plate 66 is fixedly connected to the side of the guard plate 62 near the work roller 2. Each movable plate 66 has a through-hole 661 on the side near each column 11, and each through-hole 661 is vertically oriented. A bolt passes through each through-hole 661 of the movable plate 66, and each bolt is threaded into the adjacent column 11. The movable plate 66 abuts against the adjacent column 11.

[0046] When it is necessary to adjust the position between the guide plate 61 and the guard plate 62, loosen the bolts connecting the connecting plate 64 and the fixed plate 65, as well as the bolts connecting the moving plate 66 and the column 11. Adjust the position of the guide plate 61 according to the length direction of the elongated hole 641, and adjust the position of the guard plate 62 according to the length direction of the moving hole 661, thereby enabling the guiding function of steel billets of different sizes.

[0047] Each guide component 6 is connected to a linkage component 7, which is used to drive the two connected guide plates 61 and guard plate 62 to move synchronously.

[0048] By setting the linkage component 7 to drive the two guide plates 61 and guard plate 62 to move synchronously, the positions of the two guide plates 61 and guard plate 62 can be adjusted according to the current required billet size. Since the two guide plates 61 and guard plate 62 move at the same time, the billet can be positioned in the middle of the two work rolls 2 under the guidance of the two guide plates 61.

[0049] The guide assembly 6 includes a connecting rod 71 fixedly connected to each connecting plate 64, and each connecting rod 71 is vertically upward. The upper ends of the two connecting rods 71 ​​are threaded through and connected to the same double-acting screw 72, which is horizontally positioned. A drive bevel gear 73 is fixedly sleeved at the middle position of the double-acting screw 72, and a driven bevel gear 74 meshes with the lower side of the drive bevel gear 73.

[0050] A vertically arranged linkage screw 75 is fixedly connected to the lower side of the driven bevel gear 74. A connecting support plate 76 is threaded onto the linkage screw 75. The side of the connecting support plate 76 closest to the moving plate 66 is fixedly connected to the moving plate 66.

[0051] When it is necessary to move the guide plate 61 and the guard plate 62, rotate the double-acting screw 72. During the rotation of the double-acting screw 72, the two connecting rods 71 ​​connected to it move synchronously. During the movement of the two connecting rods 71, the two guide plates 61 connected to it move synchronously, thereby adjusting the distance between the two guide plates 61.

[0052] During the rotation of the bidirectional lead screw 72, the connected drive bevel gear 73 is driven to rotate. During the rotation of the drive bevel gear 73, the connected driven bevel gear 74 is driven to rotate. During the rotation of the driven bevel gear 74, the connected linkage lead screw 75 is driven to rotate. During the rotation of the linkage lead screw 75, the connecting support plate 76, the moving plate 66, and the guard plate 62 are moved up and down, thereby adjusting the position of the guard plate 62.

[0053] The implementation principle of a rolling mill according to an embodiment of this application is as follows: When it is necessary to roll a steel billet, the bidirectional lead screw 72 and the two lifting hydraulic cylinders 4 are first adjusted according to the size of the steel billet. Then the steel billet is moved to one side of the frame 1.

[0054] During its movement, the billet abuts against the guide plate 61, guide roller 611, guard plate 62, and limiting plate 63, thereby adjusting the angle at which the billet enters and exits the two work rolls 2. This achieves an accurate rolling process for the billet.

[0055] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A rolling mill, characterized in that: The frame includes a frame (1) connected to two opposing and parallel work rolls (2), with support rolls (3) abutting the opposite sides of the two work rolls (2). Guide components (6) are connected to the opposite sides of the frame (1), and the guide components (6) are used to guide the billet to a direction perpendicular to the work rolls (2).

2. A rolling mill according to claim 1, characterized in that: The guide assembly (6) includes two guide plates (61) arranged opposite to each other, the two guide plates (61) being arranged at an angle that gradually moves away from each other from the side close to the adjacent work roller (2) to the side away from the work roller (2).

3. A rolling mill according to claim 2, characterized in that: Each guide plate (61) is fixedly connected to a connecting plate (64) on the side near the working roller (2). Each connecting plate (64) has an elongated hole (641) in a direction parallel to the length direction of the working roller (2). Each connecting plate (64) is connected to the frame (1) by bolts set inside the elongated hole (641).

4. A rolling mill according to claim 2, characterized in that: Each of the guide plates (61) is equipped with a plurality of guide rollers (611) for contacting the billet.

5. A rolling mill according to claim 3, characterized in that: The upper side of the two guide plates (61) is provided with a guard plate (62), the guard plate (62) is connected to the frame (1) and the guard plate (62) is gradually inclined from top to bottom toward the adjacent work roller (2), and the lower side of the guard plate (62) is provided with a horizontally arranged limiting plate (63).

6. A rolling mill according to claim 5, characterized in that: The upper support roller (3) is connected to the adjacent working roller (2), and the support roller (3) is connected to a lifting hydraulic cylinder (4) for driving the support roller (3) and the connected working roller (2) to move up and down. The guard plate (62) is fixedly connected to a moving plate (66), and the moving plate (66) has multiple moving holes (661) in the vertical direction. The moving plate (66) is connected to the frame (1) by bolts inserted into the multiple moving holes (661).

7. A rolling mill according to claim 6, characterized in that: The two adjacent guide plates (61) and the guard plate (62) are connected to the same linkage component (7), which is used to drive the two connected guide plates (61) and the guard plate (62) to move simultaneously.

8. A rolling mill according to claim 7, characterized in that: Each of the connecting plates (64) is fixedly connected to a connecting rod (71) on the side away from the connected guide plate (61). Two connecting rods (71) are threaded through and connected to a double-acting screw (72). The double-acting screw (72) is fixedly sleeved with a driving bevel gear (73). The driving bevel gear (73) meshes with a driven bevel gear (74). The driven bevel gear (74) is fixedly connected to a vertically arranged linkage screw (75). The linkage screw (75) is connected to the moving plate (66) and is used to drive the moving plate (66) to move.

Images