Working roll device for finishing mill

Abstract

The utility model relates to a working roll device for a finishing mill, which comprises a rack, a lower working roll and an upper working roll, wherein the lower working roll is rotatably arranged on the rack; the upper working roll is horizontally arranged above the lower working roll in parallel; the positions, located at the two axial ends of the upper working roller, of the rack are each rotationally connected with a vertical lifting screw set, the two axial ends of the upper working roller are each provided with a driving mechanism used for driving the lifting screw sets at the corresponding ends to rotate, a first motor is installed at one axial end of the upper working roller, and the other end of the upper working roller is rotationally connected with a bearing box. The first motor and the bearing box are arranged on the lifting screw sets at the corresponding ends in a threaded sleeving mode through adjusting mechanisms correspondingly, and each lifting screw set comprises two lifting screws. According to the working roll device, the width of the roll gap between the upper working roll and the lower working roll can be flexibly adjusted according to needs, and the thickness uniformity of a large-width steel belt in the width direction can be improved.

Description

Technical Field

[0001] The utility model relates to the field of finishing mill parts, in particular to a working roll device for a finishing mill. Background Art

[0002] In the production process of strip steel, the strip steel passes through multiple groups of working rolls of the finishing mill and is finally rolled into a steel strip of set thickness. The current finishing mill has a relatively fixed and single adjustment and control method for the working roll device, and the axial widths of the roll gaps between the working rolls increase or decrease synchronously, which will cause certain limitations in rolling wide-width steel strips. The wide-width steel strips are relatively wide, and after hot rolling, they are not only extended in the length direction, but also in the width direction, which makes it easy for the thickness to be uneven in the width direction. When passing through the working rolls of the finishing mill, if the axial widths of the roll gaps are adjusted synchronously, the roll gaps cannot be flexibly adjusted according to the thickness distribution of the steel strip before entering the working rolls, and it is not easy to adjust the thickness of the wide-width steel strip in the width direction. How to flexibly adjust the roll gaps between the working rolls in production to make the thickness of the wide-width steel strips uniform has become an urgent problem to be solved. Utility Model Content

[0003] The main purpose of the utility model is to provide a working roll device for a finishing mill, so as to solve the problem that it is difficult to roll a large-width steel strip with uniform thickness due to the relatively single working roll adjustment method in the existing finishing mill.

[0004] To solve the above problems, the utility model is achieved as follows:

[0005] A working roll device for a finishing mill comprises a frame, a lower working roll rotatably arranged on the frame, and an upper working roll horizontally and parallelly arranged above the lower working roll;

[0006] Both axial ends of the frame located on the upper working roll are rotatably connected to a vertical lifting screw group, and both axial ends of the upper working roll are provided with a driving mechanism for driving the lifting screw group at the corresponding end to rotate, a first motor is installed at one axial end of the upper working roll, and the other end of the upper working roll is rotatably connected to a bearing box, the first motor and the bearing box are respectively threadedly sleeved on the lifting screw group at the corresponding end through an adjusting mechanism, and each of the lifting screw groups includes two lifting screws.

[0007] Among them, the two lifting screws are located on the radial sides of the corresponding ends of the upper working roll, and each of the adjustment mechanisms includes adjusting nuts respectively threadedly sleeved on the two lifting screws, a connecting rod fixedly connected between the two adjusting nuts, and a rotating seat rotatably sleeved on the connecting rod, and the rotating seat is fixedly connected to the motor or the bearing box.

[0008] Wherein, the driving mechanism comprises a driving motor, an upper box and a transmission mechanism, the upper box is fixedly connected to the frame, the motor shaft of the driving motor vertically extends downward into the upper box, the transmission mechanism is arranged in the upper box, and the top ends of the two lifting screws extend upward into the upper box;

[0009] The transmission mechanism includes two first bevel gears, two second bevel gears, a driving bevel gear, a driven bevel gear, and a rotating shaft. The two first bevel gears are coaxially and fixedly arranged on the upper parts of the two lifting screws, the driving bevel gear is coaxially and fixedly arranged on the motor shaft of the driving motor, the two second bevel gears are coaxially and fixedly arranged at both ends of the rotating shaft, and the second bevel gears are meshed with the first bevel gears at the corresponding ends, the driven bevel gear is meshed with the driving bevel gear, and the driven bevel gear is fixedly and coaxially sleeved on the rotating shaft.

[0010] Among them, one end of the lower working roller is connected to the second motor, and the other end of the lower working roller is rotatably mounted on the bearing box, and the motor seat of the second motor and the bearing box are fixedly arranged on the frame.

[0011] Wherein, a reduction gear box is arranged between the first motor and the upper working roll.

[0012] Wherein, a reduction gearbox is arranged between the second motor and the lower working roll.

[0013] Wherein, a connecting frame is arranged on the upper working roll, both axial ends of the connecting frame are sleeved on both axial ends of the upper working roll, and both axial ends of the upper working roll are rotatably connected with the connecting frame.

[0014] Among them, one axial end side of the connecting frame is fixedly connected to the corresponding reduction box, and the other axial end of the connecting frame is fixedly connected to the corresponding bearing box.

[0015] The beneficial effects of this application are:

[0016] When the working roll device of the prior art finishing mill rolls a wide steel strip, the steel strip will also extend in the width direction, making it difficult to control the thickness on both sides of the steel strip in the width direction. However, by adopting the working roll device of the utility model, the width of the roll gap between the upper working roll and the lower working roll can be adjusted as a whole according to actual needs, and the width of a single side of the roll gap can also be adjusted as needed, and the width of the two sides of the roll gap axial direction can also be adjusted differently. The working roll device of the utility model can flexibly adjust the width of the roll gap between the upper working roll and the lower working roll as needed, and can improve the thickness uniformity of the wide steel strip in the width direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the utility model after removing the protective cover;

[0020] Figure 3 yes Figure 2 The main view of

[0021] Figure 4 yes Figure 2 Side view of

[0022] Figure 5 It is a structural diagram of the driving mechanism.

[0023] Description of Reference Numerals

[0024] 1. Protective cover; 21. Upper working roller; 22. First motor; 31. Lower working roller; 32. Second motor; 41. Bearing box; 42. Speed ​​reducer; 51. Lifting screw; 6. Adjusting mechanism; 61. Adjusting nut; 62. Connecting rod; 63. Rotating seat; 7. Driving mechanism; 71. Driving motor; 72. Upper box; 73. Active bevel gear; 74. Driven bevel gear; 75. Rotating shaft; 76. First bevel gear; 77. Second bevel gear; 78. Support seat; 8. Connecting frame. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0026] like Figure 1-Figure 4As shown, a working roll device for a finishing mill of the utility model comprises a frame, a lower working roll 31 rotatably arranged on the frame, and an upper working roll 21 horizontally and parallelly arranged above the lower working roll 31, that is, the upper working roll 21 is parallel to the lower working roll 31, and both are arranged horizontally, and a roll gap for passing the steel strip is formed between the upper working roll 21 and the lower working roll 31. The frame comprises two oppositely arranged protective covers 1, and the side of the protective cover 1 facing the other protective cover 1 is closed. During installation, the first motor 22, the second motor 32, the bearing box 41, the reduction box 42, etc. can be placed in the corresponding protective cover 1 respectively, which can play a role in aesthetics and prevent the iron oxide dust generated in the finishing rolling of the steel strip from polluting the above-mentioned components.

[0027] Both axial ends of the frame located on the upper working roll 21 are rotatably connected to a vertical lifting screw group, each lifting screw group includes two lifting screws 51, and in the same lifting screw group, the two lifting screws 51 are located on both radial sides of the corresponding ends of the upper working roll 21. Both axial ends of the upper working roll 21 are provided with a driving mechanism 7 for driving the lifting screw group at the corresponding end to rotate, a first motor 22 is installed at one axial end of the upper working roll 21, and the other end of the upper working roll 21 is rotatably connected to the bearing box 41. In this embodiment, a reduction box 42 is arranged between the first motor 22 and the upper working roll 21, the input shaft of the reduction box 42 is fixedly connected to the motor shaft of the first motor 22, the output shaft of the reduction box 42 is fixedly connected to the axial corresponding end of the upper working roll 21, and the housing of the reduction box 42 is fixedly connected to the motor seat of the first motor 22.

[0028] The first motor 22 and the bearing box 41 are respectively threadedly sleeved on the lifting screw groups at the corresponding ends through the adjustment mechanism 6. Each adjustment mechanism 6 includes an adjustment nut 52 threadedly sleeved on the two lifting screws 51, a connecting rod 62 fixedly connected between the two adjusting nuts 61, and a rotating seat 63 rotatably sleeved on the connecting rod 62, the connecting rod 62 is horizontally arranged, and the rotating seat 63 is fixedly connected to the first motor 22 or the bearing box 41. In this embodiment, the rotating seat 63 close to the first motor 22 is fixedly connected to the reduction box 42 to achieve a fixed connection with the motor seat of the first motor 22, and the rotating seat 63 close to the bearing box 41 is fixedly connected to the bearing box 41.

[0029] One end of the lower working roll 31 is connected to the second motor 32, and the other end of the lower working roll 31 is rotatably mounted with a bearing box 41. The motor seat and the bearing box 41 of the second motor 32 are fixedly arranged on the frame. In this embodiment, the motor seat and the bearing box 41 of the second motor 32 are respectively fixedly arranged at the lower part of the two protective covers 1. In addition, a reduction box 42 is arranged between the second motor 32 and the lower working roll 31, the input shaft of the reduction box 42 is fixedly connected to the motor shaft of the second motor 32, the output shaft of the reduction box 42 is fixedly connected to the axial corresponding end of the lower working roll 31, and the housing of the reduction box 42 is fixedly connected to the motor seat of the second motor 32. The reduction box 42 at the output end of the first motor 22 and the reduction box 42 at the output end of the second motor 32 are located in the same protective cover 11, and the other two bearing boxes 41 are located in another protective cover 11.

[0030] like Figure 2 , Figure 5 As shown, the driving mechanism 7 includes a driving motor 71, an upper box body 72 and a transmission mechanism, and the upper box body 72 is fixedly connected to the frame. In this embodiment, the number of upper boxes 72 is two, and the two upper boxes 72 are fixedly arranged on the tops of the two protective covers 1 respectively. The motor seat of the driving motor 71 is fixedly arranged on the top of the upper box body 72, and the motor shaft of the driving motor 71 extends vertically downward into the upper box body 72. The transmission mechanism is arranged in the upper box body 72, and the top ends of the two lifting screw rods 51 extend upward into the upper box body 72, and the lifting screw rods 51 are rotatably connected to the upper box body 72. The bottoms of the two lifting screw rods 51 are rotatably connected to the inner wall of the protective cover 1. In this embodiment, a support seat (not shown in the figure) is fixedly arranged inside the protective cover 1, and the bottoms of the lifting screw rods 51 are rotatably connected to the support seat.

[0031] The transmission mechanism includes two first bevel gears 76, two second bevel gears 77, a driving bevel gear 73, a driven bevel gear 74, and a rotating shaft 75. The two first bevel gears 76 are coaxially and fixedly arranged on the upper part of the two lifting screws 51, respectively, and the driving bevel gear 73 is coaxially and fixedly arranged on the motor shaft of the driving motor 71. The rotating shaft 75 is arranged horizontally, and the axial direction of the rotating shaft 75 is perpendicular to the axial direction of the upper working roll 21. The two second bevel gears 77 are coaxially and fixedly arranged at both ends of the axial direction of the rotating shaft 75, and the second bevel gears 77 are meshed with the first bevel gears 76 at the corresponding ends, and the driven bevel gear 74 is meshed with the driving bevel gear 73, and the driven bevel gear 74 is fixedly and coaxially sleeved on the rotating shaft 75. A support seat 78 is fixedly arranged at the upper part of the upper box body 72, and the rotating shaft 75 passes through the support seat 78 and is rotatably connected with the support seat 78.

[0032] A connecting frame 8 is provided on the upper working roll 21, and both axial ends of the connecting frame 8 are sleeved on both axial ends of the upper working roll 21, and both axial ends of the upper working roll 21 are rotatably connected to the connecting frame 8. Among them, one axial end side of the connecting frame 8 is fixedly connected to the housing of the corresponding reduction box 42, and the other axial end of the connecting frame 8 is fixedly connected to the corresponding bearing box 41. The setting of the connecting frame 8 can provide a strong support for the upper working roll 21 when the upper working roll 21 is displaced, and prevent the deformation of the upper working roll 21 caused by the lifting and lowering of its axial ends. Secondly, it can also realize the firm connection between the upper working roll and the reduction box 42 and the bearing box 41.

[0033] like Figure 1-Figure 5 As shown, when using the utility model, the working roll device of the utility model can be prepared in multiple groups, and the multiple groups of working roll devices are arranged on the finishing mill along the conveying direction of the steel strip, so that the adjustment accuracy of the roll gap can be improved. When the working roll device of the finishing mill of the prior art rolls a large width steel strip, the thickness on both sides of the width direction of the steel strip is difficult to control because the steel strip will also extend in the width direction. By adopting the working roll device of the utility model, the width of the roll gap between the upper working roll 21 and the lower working roll 31 can be adjusted as a whole according to actual needs, and the width of one side of the roll gap can also be adjusted as needed, and the width of the two sides of the roll gap axial direction can also be adjusted differently. The working roll device of the utility model can flexibly adjust the width of the roll gap between the upper working roll 21 and the lower working roll 31 as needed.

[0034] When the width of one side of the roll gap needs to be adjusted, the drive motor 71 on the corresponding side is turned on, and the drive motor 71 rotates. Under the action of the meshing of the active bevel gear 73 and the driven bevel gear 74, the rotating shaft 75 is driven to rotate. Under the meshing of the first bevel gear 76 and the second bevel gear, the two lifting screws 51 on this side rotate synchronously. When the lifting screw 51 rotates, it drives the adjusting nut 61 to move up or down in the vertical direction. Since the two adjusting nuts 61 are fixedly connected by the connecting rod 62, the first motor 22 or the bearing box 41 at the end of the upper working roll 21 is rotatably connected to the connecting rod 2, and can be raised and lowered with the adjusting nut 61, thereby adjusting the height of the upper working roll 21 to adjust the width of the corresponding side of the roll gap. In addition, the first motor 22 or the bearing box 41 at the end of the upper working roll 21 is rotatably connected to the connecting rod 2, so that when one end of the upper working roll 21 is raised and lowered, the other end can freely adjust the lifting height as needed. When the upper working roll 21 or the lower working roll 31 is worn, in order to make the thickness of the wide-width steel strip in the width direction uniform, the width of the roll gap on the corresponding side can be adjusted separately as needed. When it is detected that the thickness of one side of the wide-width steel strip is thicker or thinner, the thickness of the roller gap on this side can be adjusted separately to achieve uniform thickness on both sides of the wide-width steel strip in the width direction.

[0035] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A working roll device for a finishing mill, characterized in that: It comprises a frame, a lower working roll rotatably arranged on the frame, and an upper working roll horizontally and parallelly arranged above the lower working roll; Both axial ends of the frame located on the upper working roll are rotatably connected to a vertical lifting screw group, and both axial ends of the upper working roll are provided with a driving mechanism for driving the lifting screw group at the corresponding end to rotate, a first motor is installed at one axial end of the upper working roll, and the other end of the upper working roll is rotatably connected to a bearing box, the first motor and the bearing box are respectively threadedly sleeved on the lifting screw group at the corresponding end through an adjusting mechanism, and each of the lifting screw groups includes two lifting screws.

2. A working roll device for a finishing mill according to claim 1, characterized in that: The two lifting screws are located on radial sides of corresponding ends of the upper working roll, and each of the adjustment mechanisms includes adjusting nuts respectively threadedly sleeved on the two lifting screws, a connecting rod fixedly connected between the two adjusting nuts, and a rotating seat rotatably sleeved on the connecting rod, and the rotating seat is fixedly connected to the motor or the bearing box.

3. A working roll device for a finishing mill according to claim 1, characterized in that: The driving mechanism comprises a driving motor, an upper box and a transmission mechanism, the upper box is fixedly connected to the frame, the motor shaft of the driving motor vertically extends downward into the upper box, the transmission mechanism is arranged in the upper box, and the top ends of the two lifting screws extend upward into the upper box; The transmission mechanism includes two first bevel gears, two second bevel gears, a driving bevel gear, a driven bevel gear, and a rotating shaft. The two first bevel gears are coaxially and fixedly arranged on the upper parts of the two lifting screws, the driving bevel gear is coaxially and fixedly arranged on the motor shaft of the driving motor, the two second bevel gears are coaxially and fixedly arranged at both ends of the rotating shaft, and the second bevel gears are meshed with the first bevel gears at the corresponding ends, the driven bevel gear is meshed with the driving bevel gear, and the driven bevel gear is fixedly and coaxially sleeved on the rotating shaft.

4. A working roll device for a finishing mill according to claim 1, characterized in that: One end of the lower working roll is connected to the second motor, and the other end of the lower working roll is rotatably mounted with a bearing box. The motor seat of the second motor and the bearing box are fixedly arranged on the frame.

5. A working roll device for a finishing mill according to claim 1, characterized in that: A reduction gearbox is arranged between the first motor and the upper working roll.

6. A working roll device for a finishing mill according to claim 4, characterized in that: A reduction gearbox is arranged between the second motor and the lower working roll.

7. A working roll device for a finishing mill according to claim 5, characterized in that: A connecting frame is arranged on the upper working roll, and both axial ends of the connecting frame are sleeved on both axial ends of the upper working roll, and both axial ends of the upper working roll are rotatably connected with the connecting frame.

8. A working roll device for a finishing mill according to claim 7, characterized in that: One axial end side of the connecting frame is fixedly connected to the corresponding reduction box, and the other axial end side of the connecting frame is fixedly connected to the corresponding bearing box.

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