A quick roll changing and automatic centering device for a hot rolling mill

Abstract

This utility model relates to the field of hot rolling mill technology and discloses a quick roll changing and automatic centering device for hot rolling mills. It includes a fixed frame, with a bidirectional motor fixedly connected to the inner wall of the fixed frame. Both drive ends of the bidirectional motor are connected to a movable platform via movable components for adjusting the position of the movable platforms. Mounting cylinders are rotatably connected to both sides of the inner wall of each movable platform, and knobs are rotatably connected to the inner wall of each mounting cylinder. Each knob has an inwardly connected roll via a snap-fit ​​component for roll assembly and disassembly. An electric motor is fixedly connected to the inner wall of each movable platform. In this utility model, the roll assembly and disassembly can be completed by rotating bolts and knobs to release the limiting position on the roll. This allows for quick release and fixing of the limiting position without complex tools or hydraulic systems, significantly shortening roll changing time, improving assembly and disassembly efficiency, reducing the risk of downtime due to complex system failures, and ensuring the continuity of hot rolling production and equipment stability.

Description

Technical Field

[0001] This utility model relates to the field of hot rolling mill technology, and in particular to a quick roll changing and automatic centering device for hot rolling mills. Background Technology

[0002] Hot rolling mills are core equipment in the steel industry. They use rolls at high temperatures to squeeze and stretch metal billets such as steel billets, causing them to undergo plastic deformation. This process turns the billets into steel products of different specifications, such as plates, profiles, and pipes. At the same time, it improves the internal structure of the metal to optimize mechanical properties such as strength and toughness. Hot rolling mills are widely used to provide basic raw materials for downstream industries such as machinery manufacturing, automobiles, construction, and energy.

[0003] In the modern steel industry, hot rolling mills are core production equipment, and the efficient maintenance of their roll system is crucial to ensuring the continuity of the production line and product quality. The current system has a high degree of manual intervention and low automation, and the roll changing operation is cumbersome and time-consuming, resulting in long equipment downtime and greatly affecting production efficiency. In response to the technical problem of inconvenient roll disassembly and assembly, this application proposes a quick roll changing and automatic centering device for hot rolling mills. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies that make roll disassembly and assembly inconvenient. It proposes a rapid roll changing and automatic centering device for hot rolling mills. By rotating bolts and knobs, the limiting positions on the rolls can be released, allowing for easy disassembly and assembly. This eliminates the need for complex tools or hydraulic systems, significantly shortening roll changing time, improving disassembly and assembly efficiency, reducing downtime risks caused by complex system failures, and ensuring the continuity of hot rolling production and equipment stability.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A quick roll changing and automatic centering device for a hot rolling mill includes a fixed frame. A bidirectional motor is fixedly connected to the inner wall of the fixed frame. Both drive ends of the bidirectional motor are connected to a movable platform via movable components for adjusting the position of the movable platforms. Mounting cylinders are rotatably connected to both sides of the inner wall of the movable platforms. Knobs are rotatably connected to the inner wall of each mounting cylinder. A roll is connected to the inward end of each knob via a snap-fit ​​component for assembling and disassembling the roll. An electric motor is fixedly connected to the inner wall of each movable platform. The drive end of each electric motor is connected to the mounting cylinder via a rotating component for driving the roll to rotate. Hydraulic rods are fixedly connected to both sides of the top of the fixed frame. The bottom ends of each hydraulic rod are fixedly connected to the top of the upper movable platform. The outer wall of the movable platform is slidably connected to the inner wall of the fixed frame.

[0006] Furthermore, the buckle assembly includes slots formed on both sides of the inner wall of the roll, and each slot has a locking block on its inner wall. The shape of the locking block matches the slot, and the outer wall of the locking block is slidably connected to the inner wall of the mounting cylinder.

[0007] Furthermore, each knob is fixedly connected to a rotating frame at its inward end, and rotating rods are rotatably connected to both sides of the outer wall of the rotating frame. The inward end of each rotating rod is rotatably connected to the outward end of the locking block.

[0008] Furthermore, each knob has a bolt on its inner wall, each mounting cylinder has a threaded groove on its inner wall, and the outer wall of each bolt is located on the inner wall of the threaded groove.

[0009] Furthermore, the rotating assembly includes a gear one fixedly connected to the drive end of the motor, the outer wall of the gear one being meshed with a toothed ring, and the inner wall of the toothed ring being fixedly connected to the outer wall of the right mounting cylinder.

[0010] Furthermore, the active component includes a main bevel gear fixedly connected to both drive ends of the bidirectional motor, and the outer walls of the main bevel gear are meshed with auxiliary bevel gears.

[0011] Furthermore, each of the secondary bevel gears has a threaded rod fixedly connected to its left end, and the left end of each threaded rod is rotatably connected to the inner wall of the fixed frame, while the outer wall of each threaded rod is threadedly connected to the inner wall of the moving platform.

[0012] Furthermore, multiple proximity switch sensors are fixedly connected to both the inner wall of the fixed frame and the front end of the moving platform.

[0013] This utility model has the following beneficial effects: 1. In this utility model, the limit on the roll can be released by rotating the bolt and knob, and the roll can be disassembled and assembled. The limit release and fixation can be completed quickly without complicated tools or hydraulic systems, which significantly shortens the roll changing time, improves disassembly and assembly efficiency, reduces the risk of downtime caused by complex system failures, and provides a guarantee for the continuity of hot rolling production and equipment stability.

[0014] 2. In this utility model, by controlling the drive ends on both sides of the bidirectional motor and the proximity switch sensor at the front end, the position of the roll can be adjusted for automatic centering. The precise drive of the motor and the real-time monitoring of the sensor can form a closed-loop control, which can quickly correct position deviations, reduce manual calibration errors, improve roll changing efficiency, and reduce labor intensity through automation. Attached Figure Description

[0015] Figure 1 This is a perspective view of a hot rolling mill quick roll changing and automatic centering device proposed in this utility model; Figure 2This is a cross-sectional view of the fixing frame of a hot rolling mill quick roll changing and automatic centering device proposed in this utility model; Figure 3 This is a front sectional view of the moving table of a hot rolling mill quick roll changing and automatic centering device proposed in this utility model. Figure 4 This is a left-side sectional view of the moving platform of a hot rolling mill quick roll changing and automatic centering device proposed in this utility model; Figure 5 This is a cross-sectional view of the mounting cylinder of a hot rolling mill quick roll changing and automatic centering device proposed in this utility model; Figure 6 This is a diagram of the slot structure of a quick roll changing and automatic centering device for a hot rolling mill proposed in this utility model.

[0016] Legend: 1. Fixed frame; 2. Bidirectional motor; 3. Main bevel gear; 4. Secondary bevel gear; 5. Threaded rod; 6. Moving stage; 7. Proximity switch sensor; 8. Motor; 9. Gear 1; 10. Gear ring; 11. Mounting cylinder; 12. Knob; 13. Bolt; 14. Rotating frame; 15. Rotating rod; 16. Locking block; 17. Roller; 18. Slot; 19. Hydraulic rod. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figures 4-6As shown, one embodiment of this utility model provides a quick roll changing and automatic centering device for a hot rolling mill, comprising a fixed frame 1, mounting cylinders 11 rotatably connected to both sides of the inner wall of a moving platform 6, knobs 12 rotatably connected to the inner wall of each mounting cylinder 11, and a roll 17 disposed at one inward end of each knob 12, a motor 8 fixedly connected to the inner wall of the moving platform 6, and the outer wall of the moving platform 6 slidably connected to the inner wall of the fixed frame 1, with slots 18 formed on both sides of the inner wall of each roll 17, and locking blocks 16 disposed on the inner wall of each slot 18, the shape of which fits the slot 18, and the outer wall of each locking block 16 slidably connected to the mounting cylinder. The inner wall of the mounting cylinder 11 and the inner end of the knob 12 are all fixedly connected to a rotating frame 14. The outer walls of the rotating frame 14 are rotatably connected to rotating rods 15. The inner ends of the rotating rods 15 are rotatably connected to the outer ends of the locking blocks 16. The inner wall of the knob 12 is provided with bolts 13. The inner wall of the mounting cylinder 11 is provided with threaded grooves. The outer walls of the bolts 13 are all located on the inner walls of the threaded grooves for the assembly and disassembly of the rolls 17. The drive end of the motor 8 is fixedly connected to a gear 9. The outer walls of the gear 9 are meshed with gear rings 10. The inner walls of the gear rings 10 are fixedly connected to the outer walls of the right mounting cylinder 11 for driving the rolls 17 to rotate.

[0019] Specifically, during processing, the motor 8 is started, which drives the gear 9 to rotate. The gear 9 drives the gear ring 10 to rotate, which in turn drives the mounting cylinder 11 and the roll 17 to rotate. At the same time, the hydraulic rod 19 is activated, which drives the side roll 17 to move downward to process the material. The upper moving table 6 is divided into two parts: one part engages with the threaded rod 5, and the other part is connected to the roll 17. The other part is slidably connected to the other part. By rotating the bolt 13 and the knob 12, the limit on the roll 17 can be released, and the assembly and disassembly can be completed. The limit release and fixation can be completed quickly without complicated tools or hydraulic systems, which significantly shortens the roll changing time, improves the assembly and disassembly efficiency, reduces the risk of downtime caused by complex system failures, and provides a guarantee for the continuity of hot rolling production and the stability of equipment.

[0020] Reference Figures 1-3 As shown, a bidirectional motor 2 is fixedly connected to the inner wall of the fixed frame 1. A moving platform 6 is provided on both sides of the drive end of the bidirectional motor 2. A main bevel gear 3 is fixedly connected to both sides of the drive end of the bidirectional motor 2. A hydraulic rod 19 is fixedly connected to both sides of the top of the fixed frame 1. The bottom end of the hydraulic rod 19 is fixedly connected to the top of the upper moving platform 6. A secondary bevel gear 4 is meshed with the outer wall of the main bevel gear 3. A threaded rod 5 is fixedly connected to the left end of the secondary bevel gear 4. The left end of the threaded rod 5 is rotatably connected to the inner wall of the fixed frame 1. The outer wall of the threaded rod 5 is threadedly connected to the inner wall of the moving platform 6. Multiple proximity switch sensors 7 are fixedly connected to the inner wall of the fixed frame 1 and the front end of the moving platform 6 for adjusting the position of the two moving platforms 6.

[0021] Specifically, a controller is installed at the front end of the fixed frame 1. The controller is electrically connected to the bidirectional motor 2, the electric motor 8, and the proximity switch sensor 7. When one drive end of the bidirectional motor 2 rotates, the other side will not rotate. The other side can only be started after one side has finished rotating. The proximity switch sensor 7 is based on the principles of electromagnetic induction, capacitance change, or photoelectric effect. It can output an electrical signal by detecting the physical quantity change when an object approaches without mechanical contact. In the rolling mill, it can monitor the position of the roll 17 in real time and feed it back to the system to achieve automatic centering. It has the characteristics of fast response, long life and anti-interference. By controlling the drive ends on both sides of the bidirectional motor 2 and the proximity switch sensor 7 at the front end, the position of the roll 17 can be adjusted for automatic centering. The precise drive of the motor and the real-time monitoring of the sensor can form a closed loop control, quickly correct position deviation, reduce manual calibration error, improve roll changing efficiency, and reduce labor intensity through automation.

[0022] Working principle: First, when the roll 17 needs to be disassembled, rotate the bolts 13 on both sides to remove them from the threaded grooves, releasing the limit on the knob 12. Then, rotate the knobs 12 on both sides. The knobs 12 drive the rotating frame 14 to rotate, which in turn drives the rotating rods 15 on both sides of the outer wall to rotate, causing the locking blocks 16 on both sides to slide outwards. Remove the locking blocks 16 from the locking grooves 18, releasing the limit on the roll 17. Then, the roll 17 can be removed backwards, completing the disassembly and assembly. When installing, insert the roll 17 into the mounting cylinder 1. In step 1, rotate knob 12 in the opposite direction to engage the two side blocks 16 into the slots 18, and rotate bolt 13 into the threaded groove to complete the installation. At the same time, during centering, the position of the moving platform 6 is sensed by the proximity switch sensor 7 inside the moving platform 6 and the controller starts the drive ends of the bidirectional motor 2 on both sides, which drives the main bevel gear 3 to rotate. The main bevel gear 3 drives the secondary bevel gear 4 to rotate, and the secondary bevel gear 4 drives the threaded rod 5 to rotate, thereby moving the moving platform 6 left and right to adjust the position of the moving platform 6 for centering.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rapid roll changing and automatic centering device for a hot rolling mill, characterized in that, The device includes a fixed frame (1), with a bidirectional motor (2) fixedly connected to the inner wall of the fixed frame (1). The two drive ends of the bidirectional motor (2) are connected to a movable platform (6) through movable components to adjust the position of the two movable platforms (6). The two sides of the inner wall of the movable platform (6) are rotatably connected to an installation cylinder (11). The inner wall of the installation cylinder (11) is rotatably connected to a knob (12). The inner end of the knob (12) is connected to a roller (17) through a snap-fit ​​component to facilitate the assembly and disassembly of the roller (17). The inner wall of the movable platform (6) is fixedly connected to an electric motor (8). The drive end of the electric motor (8) is connected to the installation cylinder (11) through a rotating component to drive the roller (17) to rotate. The two sides of the top of the fixed frame (1) are fixedly connected to a hydraulic rod (19). The bottom end of the hydraulic rod (19) is fixedly connected to the top of the upper movable platform (6). The outer wall of the movable platform (6) is slidably connected to the inner wall of the fixed frame (1).

2. The hot rolling mill quick roll changing and automatic centering device according to claim 1, characterized in that: The buckle assembly includes a slot (18) on both sides of the inner wall of the roll (17). The inner wall of the slot (18) is provided with a block (16). The shape of the block (16) matches the slot (18). The outer wall of the block (16) is slidably connected to the inner wall of the mounting cylinder (11).

3. The hot rolling mill quick roll changing and automatic centering device according to claim 2, characterized in that: The knob (12) is fixedly connected to a rotating frame (14) at its inner end. The rotating frame (14) is rotatably connected to two sides of its outer wall with rotating rods (15). The rotating rods (15) are rotatably connected to the outer end of the locking block (16) at their inner ends.

4. The hot rolling mill quick roll changing and automatic centering device according to claim 3, characterized in that: The inner wall of each knob (12) is provided with bolts (13), the inner wall of each mounting cylinder (11) is provided with threaded grooves, and the outer wall of each bolt (13) is provided on the inner wall of the threaded groove.

5. The hot rolling mill quick roll changing and automatic centering device according to claim 1, characterized in that: The rotating assembly includes a gear (9) fixedly connected to the drive end of the motor (8), and the outer wall of the gear (9) is meshed with a toothed ring (10), and the inner wall of the toothed ring (10) is fixedly connected to the outer wall of the right mounting cylinder (11).

6. The hot rolling mill quick roll changing and automatic centering device according to claim 1, characterized in that: The active component includes a main bevel gear (3) fixedly connected to the drive ends on both sides of the bidirectional motor (2), and the outer walls of the main bevel gear (3) are meshed with auxiliary bevel gears (4).

7. A hot rolling mill quick roll changing and automatic centering device according to claim 6, characterized in that: The left end of each of the secondary bevel gears (4) is fixedly connected to a threaded rod (5), the left end of each threaded rod (5) is rotatably connected to the inner wall of the fixed frame (1), and the outer wall of each threaded rod (5) is threadedly connected to the inner wall of the moving platform (6).

8. A hot rolling mill quick roll changing and automatic centering device according to claim 6, characterized in that: Multiple proximity switch sensors (7) are fixedly connected to both the inner wall of the fixed frame (1) and the front end of the moving platform (6).

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