A finishing and polishing machine tool for high-reliability wellhead flanges

Abstract

The application discloses a finishing and polishing machine for high-reliability wellhead flanges and belongs to the technical field of polishing machines. The bottom surface of the polishing frame is fixedly installed with a polishing wheel, and the polishing wheel is connected with a second motor. The installation frame is fixedly installed on the top surface of the base. The clamping assembly is arranged on the top surface of the placing table and is used for fixing the flange. The polishing assembly is arranged on the bottom surface of the polishing frame and is used for polishing the flange. The bidirectional screw rod is matched with the first motor, can drive the two positioning blocks to move synchronously and oppositely, realizes accurate centering and clamping of the flange in the horizontal direction, and is suitable for wellhead flanges with different outer diameter specifications.

Description

Technical Field

[0001] This invention relates to the field of polishing machine tool technology, specifically a precision polishing machine tool for high-reliability wellhead flanges. Background Technology

[0002] Wellhead flanges are critical pressure-bearing components in oil and gas drilling and production systems. They must withstand high downhole pressure, corrosive media, and mechanical impacts over long periods. Their surface smoothness, dimensional accuracy, and integrity directly affect sealing performance and service life. Defects such as burrs, weld beads, and rust protrusions on the flange surface, or insufficient polishing precision, can lead to inadequate sealing, increasing the risk of crude oil leakage. Furthermore, they accelerate flange corrosion and wear, shortening service life. Therefore, wellhead flanges require high-precision machining and polishing before leaving the factory.

[0003] Regarding clamping and positioning, existing equipment has an unreasonable clamping structure, mostly using a single fixing method, lacking a precise centering mechanism, resulting in poor versatility and easy flange positioning misalignment; the clamping components lack effective protection, easily scratching the flange outer wall; there is no secondary fixing structure adapted to the staged polishing of inner and outer walls, requiring manual re-clamping during workstation switching, which is inefficient and prone to positioning deviations, with poor adjustment flexibility, and cannot adapt to batch processing of flanges of multiple specifications; regarding polishing operations, existing equipment mostly uses a single polishing structure, unable to simultaneously polish inner and outer walls, resulting in cumbersome procedures, low efficiency, and easy positioning deviations and polishing dead corners; the polishing components lack adjustment flexibility and have poor versatility; the lubrication and cooling structure is unreasonable, with uneven and weakly targeted lubricant spraying, high temperatures easily leading to flange oxidation and deformation and wear of the grinding blocks, resulting in serious lubricant waste and difficulty in meeting stringent processing requirements.

[0004] In summary, existing machine tools have significant shortcomings in clamping and positioning, polishing operations, lubrication and cooling, and suffer from poor versatility, low efficiency, and insufficient precision, failing to meet the precision machining requirements of high-reliability wellhead flanges. Therefore, we propose a precision polishing machine tool for high-reliability wellhead flanges. Summary of the Invention

[0005] The purpose of this invention is to provide a precision polishing machine tool for high-reliability wellhead flanges, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A finishing and polishing machine tool for high-reliability wellhead flanges, comprising: A base, a protective cover is fixedly installed on the top surface of the base, a transparent door is movably installed on one side of the protective cover, a placement platform is provided on the top surface of the base, and a controller is installed on one side of the base; A polishing frame, which is fixedly mounted on the top surface of the base; Mounting bracket, which is fixedly mounted on the top surface of the base; A clamping assembly disposed on the top surface of the placement platform for fixing the flange; A polishing assembly, disposed on the bottom surface of the polishing frame, is used for polishing flanges.

[0007] Preferably, the clamping assembly includes: The mounting slot is formed on the top surface of the placement platform, and a bidirectional lead screw is rotatably connected inside the mounting slot. A first motor is fixedly installed on one side of the placement platform, and the drive shaft of the first motor is connected to one end of the bidirectional lead screw. Two positioning blocks are threadedly connected to the outer wall of the bidirectional lead screw, and a protective pad is fixedly installed on one side of each positioning block.

[0008] Preferably, the clamping assembly further includes: A movable plate is disposed on the inner bottom surface of the mounting frame. A first electric push rod is connected to each of the two inner sides of the movable plate. A fixed block is connected to one end of the telescopic shaft of the first electric push rod. An adjusting element is disposed on the bottom surface of the mounting bracket and is used to adjust the clamping assembly.

[0009] Preferably, the adjusting member includes: A movable slot is formed on the top surface of the base, and a second electric push rod is fixedly installed inside the movable slot. One end of the telescopic shaft of the second electric push rod is fixedly installed on one side of the placement platform. The third electric push rod is fixedly installed on the top surface of the mounting bracket, and one end of the telescopic shaft of the third electric push rod is connected to the top surface of the moving plate.

[0010] Preferably, the polishing assembly includes: The mounting plate is disposed on the bottom surface of the polishing frame. The bottom surface of the mounting plate is provided with an annular track. Two sliders are movably mounted inside the annular track. The bottom surface of the sliders is fixedly mounted with mounting blocks. The top surface of the polishing frame is fixedly mounted with a hydraulic cylinder. One end of the telescopic shaft of the hydraulic cylinder is fixedly mounted on the top surface of the mounting plate. A movable block is disposed inside one side of the mounting block. A second motor is fixedly installed on the bottom surface of the movable block, and a first grinding block is fixedly installed on one end of the drive shaft of the second motor.

[0011] Preferably, the polishing assembly further includes: A top plate is disposed on the inner bottom surface of the movable groove. The top plate is located at the middle position below the mounting frame. A third motor is fixedly installed on the top surface of the top plate, and a second grinding block is fixedly installed on one end of the drive shaft of the third motor. A lubricant is disposed on one side of the mounting block for lubricating the polishing position.

[0012] Preferably, the lubricant comprises: Two first lubrication boxes are fixedly installed on one side of the mounting block, and an oil pump is installed inside the first lubrication box; A delivery pipe is fixedly installed inside the first lubrication tank, with one end of the delivery pipe connected to an oil pump and the other end installed inside the movable block; Multiple nozzles are fixedly installed on the bottom surface of the movable block.

[0013] Preferably, the lubricant further includes: The second lubrication box is fixedly installed on the top surface of the mounting bracket. An oil pump is installed inside the second lubrication box, and an oil injection hose is installed on the bottom surface of the inside of the second lubrication box. The oil injection hose extends to the outside through the movable plate.

[0014] Preferably, a first cylinder is fixedly installed on one side of the mounting block, one end of the telescopic shaft of the first cylinder is connected to one side of the moving block, and a second cylinder is fixedly installed on the bottom surface of the inner side of the moving groove, with one end of the telescopic shaft of the second cylinder fixedly installed on the bottom surface of the top plate.

[0015] Preferably, the top surface of the base has two collection slots, which are connected to the movable slot, and multiple filter screens are fixedly installed inside the collection slots.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting a bidirectional lead screw, the cooperation between the bidirectional lead screw and the first motor can drive two positioning blocks to move synchronously in opposite directions, achieving precise horizontal centering and clamping of the flange. This is adaptable to wellhead flanges of different outer diameters, offering strong versatility. The protective gasket prevents direct contact between the positioning blocks and the flange outer wall, preventing scratches on the flange surface during clamping and ensuring the surface integrity of the flange outer wall before polishing, laying the foundation for high polishing accuracy. The cooperation of the moving plate, the first electric push rod, and the fixed block achieves secondary flange fixation, meeting the positioning requirements for inner wall polishing and ensuring that the flange does not shift during inner wall polishing. The wobbling mechanism enhances the polishing precision of the inner wall; the second electric push rod in the adjusting component can drive the placement table to move horizontally, enabling precise and rapid switching between the outer and inner wall polishing stations of the flange, eliminating the need for manual handling and significantly improving processing efficiency; the third electric push rod can flexibly adjust the height of the moving plate to accommodate flanges of different thicknesses, further expanding the applicability of the machine tool; the coordinated design of the clamping assembly and the adjusting component enables the flange to be fixed in stages, perfectly adapting to the process requirements of polishing the outer wall of the first grinding block and the inner wall of the second grinding block, avoiding the drawbacks of a single fixing method that cannot accommodate multiple process positioning.

[0017] 2. By setting up a polishing assembly, which adopts a staged polishing design, the first grinding block, corresponding to the flange fixed by the positioning block, completes the outer wall polishing, while the second grinding block, corresponding to the flange fixed by the fixing block, completes the inner wall polishing. This clear division of labor and precise coordination avoids the drawbacks of a single polishing structure that cannot simultaneously polish both the inner and outer walls, ensuring uniform and precise polishing of both the inner and outer walls of the flange, meeting the processing requirements of high-reliability wellhead flanges. The hydraulic cylinder on the top surface of the polishing frame can move the mounting plate up and down, flexibly adjusting the height of the polishing assembly to adapt to flanges of different thicknesses. The cooperation of the circular track and the slider allows the first grinding block to move circumferentially along the outer wall of the flange, achieving all-round, dead-angle-free polishing of the outer wall and improving the uniformity of the outer wall polishing. The moving block can move horizontally along the mounting block, further... The first grinding block's position is adjusted to improve polishing precision; the second grinding block's height can be adjusted with the adjustment mechanism to accommodate flanges of different inner diameters, offering strong versatility; the lubrication system enables precise lubrication and cooling of the polished area. The first lubrication box, delivery pipe, and nozzle work together to provide uniform lubrication and cooling for outer wall polishing, while the second lubrication box and oil spray hose work together to provide precise lubrication and cooling for inner wall polishing. This effectively reduces frictional resistance during polishing, minimizes wear on the first and second grinding blocks, extends their service life, and prevents high temperatures from causing flange surface oxidation and deformation, ensuring the processing accuracy and surface quality of the flange's inner and outer walls; the multiple nozzles ensure that the lubricant evenly covers the flange's outer polished surface, guaranteeing uniform lubrication and cooling effects and further improving polishing precision. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a precision polishing machine tool for high-reliability wellhead flanges; Figure 2 This is a schematic diagram of a placement platform structure in a precision polishing machine tool for high-reliability wellhead flanges; Figure 3 This is a schematic diagram of the base structure in a precision polishing machine tool for high-reliability wellhead flanges; Figure 4 This is a schematic diagram of a polishing frame structure in a precision polishing machine tool for high-reliability wellhead flanges; Figure 5 This is a schematic diagram of a mounting bracket structure used in a precision polishing machine for high-reliability wellhead flanges; Figure 6 This is a cross-sectional schematic diagram of a placement platform in a precision polishing machine tool for high-reliability wellhead flanges; Figure 7 This is a schematic diagram of a moving groove structure in a precision polishing machine tool for high-reliability wellhead flanges; Figure 8 This is a schematic diagram of a mounting block structure used in a precision polishing machine for high-reliability wellhead flanges.

[0019] In the diagram: 1. Base; 2. Protective cover; 3. Placement platform; 4. Polishing rack; 5. Mounting bracket; 6. Mounting slot; 7. Two-way lead screw; 8. Positioning block; 9. Protective pad; 10. Moving plate; 11. First electric push rod; 12. Fixing block; 13. First motor; 14. Moving slot; 15. Second electric push rod; 16. Third electric push rod; 17. Mounting plate; 18. Slider; 19. Mounting block; 20. Moving block; 21. Second motor; 22. First grinding block; 23. Top plate; 24. Third motor; 25. Second grinding block; 26. First lubrication tank; 27. Delivery pipe; 28. Nozzle; 29. ​​Second lubrication tank; 30. Oil spray hose; 31. First cylinder; 32. Second cylinder; 33. Collection tank; 34. Filter screen. Detailed Implementation

[0020] Please see Figures 1 to 8 In this embodiment of the invention, a precision polishing machine tool for high-reliability wellhead flanges includes: a base 1, a protective cover 2 fixedly mounted on the top surface of the base 1, a transparent door movably mounted on one side of the protective cover 2, a placement platform 3 provided on the top surface of the base 1, and a controller mounted on one side of the base 1; a polishing frame 4 fixedly mounted on the top surface of the base 1; a mounting frame 5 fixedly mounted on the top surface of the base 1; a clamping assembly provided on the top surface of the placement platform 3 for fixing the flange; and a polishing assembly provided on the bottom surface of the polishing frame 4 for polishing the flange. By installing a protective cover 2, which is fixedly mounted on the top surface of the base 1, the core working components inside the machine tool, such as the clamping and polishing components, can be sealed and protected to prevent dust and lubricant splashes during the polishing process, while also protecting the personal safety of the operators. A transparent door that is movable on one side of the protective cover 2 allows the operator to observe the flange processing status at any time without affecting the protective effect of the protective cover 2. The placement platform 3 is set on the top surface of the base 1 to support the wellhead flange to be processed and to provide a mounting carrier for the clamping components. The controller installed on one side of the base 1 serves as the control core of the entire machine tool, receiving the operating signals of each component and sending control commands to coordinate the coordinated operation of all components, such as the clamping and polishing components. The polishing frame 4 and the mounting frame 5 are both fixedly mounted on the top surface of the base 1, providing stable mounting support for the adjustment parts of the polishing and clamping components and some clamping structures, ensuring that the components do not shift during operation and guaranteeing processing accuracy.

[0021] exist Figures 2-8 The clamping assembly includes: a mounting slot 6, which is located on the top surface of the placement platform 3, and a bidirectional lead screw 7 is rotatably connected inside the mounting slot 6; a first motor 13, which is fixedly mounted on one side of the placement platform 3, and the drive shaft of the first motor 13 is connected to one end of the bidirectional lead screw 7; two positioning blocks 8, which are threadedly connected to the outer wall of the bidirectional lead screw 7, and a protective pad 9 is fixedly mounted on one side of each positioning block 8. The clamping assembly also includes: a movable plate 10, which is located on the inner bottom surface of the mounting frame 5, and the inner sides of the movable plate 10 are respectively connected to the first... An electric push rod 11 is provided, with one end of its telescopic shaft connected to a fixed block 12; an adjusting component is provided on the bottom surface of the mounting frame 5 for adjusting the clamping assembly, the adjusting component includes: a moving groove 14, the moving groove 14 is opened on the top surface of the base 1, a second electric push rod 15 is fixedly installed inside the moving groove 14, one end of the telescopic shaft of the second electric push rod 15 is fixedly installed on one side of the placement platform 3; a third electric push rod 16, the third electric push rod 16 is fixedly installed on the top surface of the mounting frame 5, one end of the telescopic shaft of the third electric push rod 16 is connected to the top surface of the moving plate 10; By setting a bidirectional lead screw 7, which works in conjunction with the first motor 13, two positioning blocks 8 can be driven to move synchronously in opposite directions, achieving precise horizontal centering and clamping of the flange. This adapts to wellhead flanges of different outer diameters, offering strong versatility. The protective pad 9 prevents direct contact between the positioning blocks 8 and the flange outer wall, preventing scratches on the flange surface during clamping and ensuring the surface integrity of the flange outer wall before polishing, thus laying the foundation for high polishing accuracy. The cooperation of the moving plate 10, the first electric push rod 11, and the fixing block 12 achieves secondary fixing of the flange, meeting the positioning requirements for inner wall polishing, ensuring that the flange does not wobble during inner wall polishing, and improving the polishing accuracy of the inner wall. The second electric push rod 15 in the section can drive the placement table 3 to move horizontally, realizing precise and rapid switching between the outer wall polishing station and the inner wall polishing station of the flange, eliminating the need for manual handling and greatly improving processing efficiency; the third electric push rod 16 can flexibly adjust the height of the moving plate 10 to adapt to flanges of different thicknesses, further expanding the applicability of the machine tool; the coordinated design of the clamping component and the adjusting component realizes the staged fixing of the flange, perfectly adapting to the process requirements of the outer wall polishing of the first grinding block 22 and the inner wall polishing of the second grinding block 25, avoiding the drawbacks of a single fixing method that cannot take into account the positioning of multiple processes, while the structure is simple, the operation is convenient, the equipment is easy to maintain, and the maintenance cost is reduced.

[0022] exist Figures 2-8The polishing assembly includes: a mounting plate 17, which is disposed on the bottom surface of the polishing frame 4. A circular track is provided on the bottom surface of the mounting plate 17, and two sliders 18 are movably mounted inside the circular track. A mounting block 19 is fixedly mounted on the bottom surface of the sliders 18. A hydraulic cylinder is fixedly mounted on the top surface of the polishing frame 4, with one end of the hydraulic cylinder's telescopic shaft fixedly mounted on the top surface of the mounting plate 17. A moving block 20 is disposed inside one side of the mounting block 19. A second motor 21 is fixedly mounted on the bottom surface of the moving block 20, and a first grinding block 22 is fixedly mounted on one end of the drive shaft of the second motor 21. The polishing assembly also includes: a top plate 23, which is disposed on the bottom surface of the moving groove 14. The top plate 23 is located in the middle position below the mounting frame 5. A third motor 24 is fixedly mounted on the top surface of the top plate 23, and the drive shaft of the third motor 24... A second polishing block 25 is fixedly installed at one end; a lubricating component is provided on one side of the mounting block 19 for lubricating the polishing position. The lubricating component includes: two first lubrication boxes 26, which are fixedly installed on one side of the mounting block 19 respectively, and an oil pump is provided inside the first lubrication box 26; a delivery pipe 27, which is fixedly installed inside the first lubrication box 26, with one end of the delivery pipe 27 connected to the oil pump and the other end installed inside the movable block 20; and multiple nozzles 28, which are fixedly installed on the bottom surface of the movable block 20. The lubricating component also includes: a second lubrication box 29, which is fixedly installed on the top surface of the mounting frame 5, and an oil pump is provided inside the second lubrication box 29. An oil spray hose 30 is installed on the bottom surface of the inner side of the second lubrication box 29, and the oil spray hose 30 extends through the movable plate 10 to the outside. By setting up a polishing assembly with a staged polishing design, the first grinding block 22, corresponding to the flange fixed by the positioning block 8, completes the outer wall polishing, while the second grinding block 25, corresponding to the flange fixed by the fixing block 12, completes the inner wall polishing. This clear division of labor and precise coordination avoids the drawbacks of a single polishing structure that cannot simultaneously handle both inner and outer wall polishing, ensuring uniform and precise polishing of both the inner and outer walls of the flange, meeting the processing requirements of high-reliability wellhead flanges. The hydraulic cylinder on the top surface of the polishing frame 4 can drive the mounting plate 17 to move up and down, flexibly adjusting the height of the polishing assembly to adapt to flanges of different thicknesses. The cooperation between the annular track and the slider 18 allows the first grinding block 22 to move circumferentially along the outer wall of the flange, achieving all-round, dead-angle-free polishing of the outer wall and improving the uniformity of the outer wall polishing. The moving block 20 can move horizontally along the mounting block 19 to further adjust the position of the first grinding block 22. Improved polishing precision; the second grinding block 25 can be adjusted in height with the adjustment component to adapt to flanges with different inner diameters, offering strong versatility; the lubrication system enables precise lubrication and cooling of the polished area. The first lubrication box 26, delivery pipe 27, and nozzle 28 work together to provide uniform lubrication and cooling for outer wall polishing, while the second lubrication box 29 and oil spray hose 30 work together to provide precise lubrication and cooling for inner wall polishing, effectively reducing frictional resistance during polishing, reducing wear on the first grinding block 22 and second grinding block 25, extending their service life, and preventing oxidation and deformation of the flange surface due to high temperatures, ensuring the processing accuracy and surface quality of the flange's inner and outer walls; the multiple nozzles 28 allow the lubricant to evenly cover the polished surface of the flange's outer wall, ensuring uniform lubrication and cooling effects, further improving polishing precision. At the same time, the precise delivery of the lubricant reduces waste and lowers operating costs.

[0023] exist Figures 2-8 In the middle: A first cylinder 31 is fixedly installed on one side of the mounting block 19. One end of the telescopic shaft of the first cylinder 31 is connected to one side of the moving block 20. A second cylinder 32 is fixedly installed on the bottom surface of the moving groove 14. One end of the telescopic shaft of the second cylinder 32 is fixedly installed on the bottom surface of the top plate 23. Two collection grooves 33 are opened on the top surface of the base 1. The collection grooves 33 are connected to the moving groove 14. Multiple filter screens 34 are fixedly installed inside the collection grooves 33. By configuring the first cylinder 31 and the second cylinder 32, the positions of the first grinding block 22 and the second grinding block 25 can be flexibly adjusted respectively, precisely matching the fixed positions of the positioning block 8 and the fixing block 12. This ensures that the first grinding block 22 can efficiently and accurately complete the polishing of the flange outer wall, and the second grinding block 25 can accurately complete the polishing of the inner wall, further improving the adaptability and polishing accuracy of the polishing components. It can accurately adapt to wellhead flanges of different specifications and sizes, expanding the applicability of the machine tool. At the same time, the cylinder adjustment response is rapid and the positioning is accurate, improving processing efficiency. The collection tank 33 is connected to the moving tank 14, which can quickly collect waste liquid, dust and debris generated during the polishing process. To prevent waste from accumulating inside the machine tool or in the processing area, maintain a clean processing environment, and improve the machine tool's operational reliability and service life; the setting of multiple filters 34 can effectively separate waste liquid and debris, and the filtered lubricating liquid can be recycled and reused, reducing the consumption cost of lubricating liquid. At the same time, polishing debris can be collected and processed centrally to avoid environmental pollution and meet the requirements of energy conservation and environmental protection; the flexible adjustment components such as the first cylinder 31 and the second cylinder 32 are perfectly adapted to the phased operation process of the clamping component and the polishing component, which not only improves the accuracy and efficiency of polishing, but also reduces the equipment maintenance and operating costs, and further adapts to the precision machining requirements of high-reliability wellhead flanges.

[0024] The working principle of this invention is as follows: During operation, the operator places the wellhead flange to be processed on the placement platform 3. The controller sends a command to start the clamping assembly. The first motor 13 drives the bidirectional lead screw 7 to rotate, causing the two positioning blocks 8 to move synchronously towards each other along the mounting groove 6. The protective pad 9 adheres to the outer wall of the flange, achieving initial fixing of the flange and providing stable support for polishing the outer wall. Subsequently, the polishing assembly is started. The hydraulic cylinder on the top surface of the polishing frame 4 drives the mounting plate 17 to move up and down, adjusting the height of the first grinding block 22 to match the height of the flange outer wall. The slider 18 slides along the annular track on the bottom surface of the mounting plate 17, cooperating with the first cylinder 31 to adjust the position of the moving block 20, so that the first grinding block 22 is precisely aligned with the flange outer wall. The second motor 21 drives the first grinding block 22 to rotate at high speed. At the same time, the oil pump in the first lubrication box 26 is started, spraying lubricating fluid onto the polishing part through the delivery pipe 27 and the nozzle 28, achieving precise polishing and lubrication cooling of the flange outer wall. After the outer wall polishing is completed, the second electric push rod 15 in the adjusting component drives the placement platform 3 to move along the moving groove 14, accurately delivering the flange to below the moving plate 10. The third electric push rod 16 drives the moving plate 10 to move downwards to the appropriate height, and the first electric push rod 11 drives the fixing block 12 to adhere to the outer wall of the flange, completing the secondary fixing of the flange. Immediately afterwards, the second cylinder 32 drives the top plate 23 to move up and down, adjusting the height of the second grinding block 25 so that it extends into the flange inner hole. The third motor 24 drives the second grinding block 25 to rotate at high speed to polish the inner wall of the flange. At the same time, the oil pump in the second lubrication box 29 starts, spraying lubricating fluid onto the polished part of the inner wall through the oil spray hose 30 to achieve lubrication and cooling for the inner wall polishing. During the entire polishing process, the generated lubricating waste liquid, dust and debris flow into the collection tank 33 through the moving groove 14. After being filtered in layers by multiple filter screens 34, the waste liquid can be recycled and reused, and the debris is collected and processed centrally. Under the overall control of the controller, all components work together to complete the precise polishing of the outer and inner walls of the flange in stages, ensuring that the processing quality meets the requirements for high-reliability wellhead flanges.

[0025] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A precision polishing machine tool for high-reliability wellhead flanges, characterized in that, include: The base (1) has a protective cover (2) fixedly installed on its top surface. A transparent box door is movably installed on one side of the protective cover (2). A placement platform (3) is provided on the top surface of the base (1). A controller is installed on one side of the base (1). Polishing frame (4), the polishing frame (4) is fixedly installed on the top surface of the base (1); Mounting bracket (5), which is fixedly mounted on the top surface of the base (1); A clamping assembly is disposed on the top surface of the placement platform (3) for fixing the flange; A polishing assembly is disposed on the bottom surface of the polishing frame (4) for polishing flanges.

2. The precision polishing machine tool for high-reliability wellhead flanges according to claim 1, characterized in that, The clamping assembly includes: Mounting slot (6) is formed on the top surface of the placement platform (3), and a two-way lead screw (7) is rotatably connected inside the mounting slot (6). The first motor (13) is fixedly installed on one side of the placement platform (3), and the drive shaft of the first motor (13) is connected to one end of the bidirectional lead screw (7). Two positioning blocks (8) are threadedly connected to the outer wall of the bidirectional lead screw (7), and a protective pad (9) is fixedly installed on one side of each positioning block (8).

3. The precision polishing machine tool for high-reliability wellhead flanges according to claim 2, characterized in that, The clamping assembly further includes: The movable plate (10) is disposed on the inner bottom surface of the mounting frame (5). The inner sides of the movable plate (10) are respectively connected to the first electric push rod (11), and one end of the telescopic shaft of the first electric push rod (11) is connected to the fixing block (12). An adjusting member is disposed on the bottom surface of the mounting bracket (5) for adjusting the clamping assembly.

4. The precision polishing machine tool for high-reliability wellhead flanges according to claim 3, characterized in that, The adjusting element includes: The movable slot (14) is opened on the top surface of the base (1). A second electric push rod (15) is fixedly installed inside the movable slot (14). One end of the telescopic shaft of the second electric push rod (15) is fixedly installed on one side of the placement platform (3). The third electric push rod (16) is fixedly installed on the top surface of the mounting bracket (5), and one end of the telescopic shaft of the third electric push rod (16) is connected to the top surface of the moving plate (10).

5. A precision polishing machine tool for high-reliability wellhead flanges according to claim 4, characterized in that, The polishing assembly includes: Mounting plate (17), the mounting plate (17) is set on the bottom surface of the polishing frame (4), the bottom surface of the mounting plate (17) is provided with an annular track, two sliders (18) are movably installed inside the annular track, the bottom surface of the sliders (18) is fixedly installed with mounting blocks (19), the top surface of the polishing frame (4) is fixedly installed with a hydraulic cylinder, one end of the telescopic shaft of the hydraulic cylinder is fixedly installed on the top surface of the mounting plate (17); The movable block (20) is located inside the mounting block (19) on one side. A second motor (21) is fixedly installed on the bottom surface of the movable block (20). A first grinding block (22) is fixedly installed at one end of the drive shaft of the second motor (21).

6. A precision polishing machine tool for high-reliability wellhead flanges according to claim 5, characterized in that, The polishing assembly also includes: Top plate (23), the top plate (23) is disposed on the inner bottom surface of the moving groove (14), the position of the top plate (23) is located in the middle below the mounting frame (5), the top surface of the top plate (23) is fixedly mounted with a third motor (24), and one end of the drive shaft of the third motor (24) is fixedly mounted with a second grinding block (25). A lubricant is provided on one side of the mounting block (19) for lubricating the polishing position.

7. A precision polishing machine tool for high-reliability wellhead flanges according to claim 6, characterized in that, The lubricating component includes: Two first lubrication boxes (26) are fixedly installed on one side of the mounting block (19), and an oil pump is provided inside the first lubrication box (26); The delivery pipe (27) is fixedly installed inside the first lubrication box (26). One end of the delivery pipe (27) is connected to the oil pump, and the other end is installed inside the moving block (20). Multiple nozzles (28) are fixedly installed on the bottom surface of the movable block (20).

8. A precision polishing machine tool for high-reliability wellhead flanges according to claim 7, characterized in that, The lubricant also includes: The second lubrication box (29) is fixedly installed on the top surface of the mounting bracket (5). An oil pump is installed inside the second lubrication box (29). An oil spray hose (30) is installed on the bottom surface of the inside of the second lubrication box (29). The oil spray hose (30) extends to the outside through the moving plate (10).

9. A precision polishing machine tool for high-reliability wellhead flanges according to claim 8, characterized in that, A first cylinder (31) is fixedly installed on one side of the mounting block (19). One end of the telescopic shaft of the first cylinder (31) is connected to one side of the moving block (20). A second cylinder (32) is fixedly installed on the bottom surface of the moving groove (14). One end of the telescopic shaft of the second cylinder (32) is fixedly installed on the bottom surface of the top plate (23).

10. A precision polishing machine tool for high-reliability wellhead flanges according to claim 7, characterized in that, The base (1) has two collection slots (33) on its top surface. The collection slots (33) are connected to the moving slot (14). Multiple filter screens (34) are fixedly installed inside the collection slots (33).

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