Polishing equipment for inner wall of carbon-carbon composite crucible

Abstract

The invention relates to the technical field of carbon-carbon composite crucible polishing, and particularly discloses a polishing device for the inner wall of a carbon-carbon composite crucible, which comprises a base, a rotating frame is rotatably mounted at the top of the base, four rotating plates are rotatably mounted in the rotating frame, clamping mechanisms are arranged at the tops of the four rotating plates, and a fixing frame is mounted on the outer wall of the base. A movable frame is arranged outside the fixed frame, a polishing mechanism is installed in the movable frame, a notch is formed in the base, a rectangular batten is rotatably installed in the notch, and a pretreatment mechanism is arranged at the top of the rectangular batten. According to the polishing device for the inner wall of the crucible, through the arranged pretreatment mechanism, the inner wall of the crucible to be polished can be subjected to primary rough polishing treatment in advance by means of two polishing blocks before the inner wall of the crucible is polished, so that a subsequent polishing mechanism can more efficiently perform chemical mechanical polishing on the inner wall of the crucible; and when the device is used for polishing the inner walls of a large batch of crucibles, the efficiency is high, and the machining period is shortened.

Description

A polishing device for the inner wall of a carbon-carbon composite crucible Technical Field

[0001] This invention relates to the field of carbon-carbon composite crucible polishing technology, and more specifically to a polishing device for the inner wall of a carbon-carbon composite crucible. Background Technology

[0002] Carbon-carbon composite crucibles are high-temperature resistant containers made of carbon fiber and its fabric-reinforced carbon matrix. They are mainly used in high-temperature smelting of metals, rare and precious metals, and non-metals, as well as in aerospace, semiconductor manufacturing, and other fields. This material has high strength, high thermal conductivity, low density, and excellent thermal shock resistance. It can be used stably in a vacuum or inert gas environment at 2800℃, and has a low coefficient of thermal expansion and outstanding creep resistance.

[0003] Due to the unique structure of carbon-carbon composite crucibles, their inner wall surface possesses high mechanical stability, necessitating CMP (Chemical Motion Polishing) to polish the inner wall. The polishing solution reacts with chemical reagents on the material surface to generate a softening layer, which is then removed by mechanical grinding, achieving global planarization. For carbon-carbon composite materials, CMP can adapt to their anisotropic structure, directly addressing micro-protrusions or depressions on the inner wall.

[0004] However, in the existing technology for polishing carbon-carbon composite crucibles, the lack of a dedicated pretreatment mechanism and pre-leveling process for the inner wall of the carbon-carbon composite crucible means that CMP has to undertake the dual tasks of rough leveling and fine polishing. This results in a large amount of material removal, poor process stability, long processing cycle, and high cost. When polishing the inner walls of large quantities of carbon-carbon composite crucibles, the efficiency is low, making it a key bottleneck restricting the precision machining efficiency of the inner walls of carbon-carbon crucibles. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a polishing device for the inner wall of a carbon-carbon composite crucible.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a polishing device for the inner wall of a carbon-carbon composite crucible, comprising a base, a rotating frame rotatably mounted on the top of the base, four rotating plates rotatably mounted inside the rotating frame, and a clamping mechanism for clamping and fixing the crucible on the top of each of the four rotating plates; a fixing frame mounted on the outer wall of the base, a movable frame outside the fixing frame, and a polishing mechanism for polishing the inner wall of the crucible mounted inside the movable frame; a notch opened inside the base, and a rectangular strip rotatably mounted inside the notch, with a pretreatment mechanism for pre-treating the inner wall of the crucible mounted on the top of the rectangular strip.

[0007] Optionally, the clamping mechanism includes a placement seat rotatably mounted on the top of the rotating plate. The placement seat has a placement groove inside. Vertical plates are installed at both ends of the top of the placement seat. First electric telescopic rods are installed on the outer walls of the two vertical plates on opposite sides. The telescopic ends of the two first electric telescopic rods pass through the corresponding vertical plates and are connected to clamping plates.

[0008] Optionally, a first motor is installed on each of the four sides of the rotating frame, and the output ends of the four first motors are respectively connected to the rotating part of one end of the corresponding rotating plate. A second motor is installed at the bottom of each of the four rotating plates, and the output ends of the second motors pass through the rotating plates and are connected to the placement base.

[0009] Optionally, the outer wall of the fixed frame away from the base has a groove, and a first lead screw is rotatably installed inside the groove. The movable frame is threadedly engaged with the outer wall of the first lead screw.

[0010] Optionally, the polishing mechanism includes first sliding grooves opened on the inner walls of both sides of the movable frame, with first sliders installed inside the two first sliding grooves, and a movable plate installed at the end of the two first sliders away from the first sliding grooves. A third motor is installed on the top of the movable plate, and the output end of the third motor passes through the movable plate and is connected to a polishing head.

[0011] Optionally, the top of the movable plate is equipped with a plurality of second electric telescopic rods, the telescopic ends of which all pass through the movable plate and are connected to a baffle plate. The inside of the movable plate is equipped with a spray pipe for connecting to an external polishing liquid delivery pipe. An elastic cover is provided inside the baffle plate, and the bottom end of the spray pipe extends downward from inside the elastic cover.

[0012] Optionally, a fourth motor and a fifth motor are installed inside the base, and the output ends of the fourth motor and the fifth motor are respectively connected to the rotating parts of the rotating frame and the rectangular strip.

[0013] Optionally, the pretreatment mechanism includes a second groove opened at the top of the rectangular strip, a second slider installed inside the second groove, a third electric telescopic rod rotatably installed at the top of the second slider, a rotating block installed at the telescopic end of the third electric telescopic rod, and rubber scrapers connected to the rotating blocks through telescopic adjustment mechanisms provided on both sides. Polishing blocks are rotatably installed on the surfaces of both rubber scrapers.

[0014] Optionally, the telescopic adjustment mechanism includes two rotating rods disposed between the rubber scraper and the rotating block. The central parts of the two rotating rods are rotatably connected by a connecting shaft. The outer walls of the rotating block and the rubber scraper are respectively provided with a first rectangular groove and a second rectangular groove. Movable seats are slidably installed inside the first rectangular groove and the second rectangular groove. One end of the two rotating rods is rotatably connected to the two movable seats respectively. A second lead screw is rotatably installed inside the first rectangular groove. One of the movable seats is threadedly connected to the outer wall of the second lead screw. The other ends of the two rotating rods are respectively hinged to the outer walls of the rubber scraper and the rotating block.

[0015] Optionally, a circular block is installed at the top of the rotating block, and two movable slots are opened at the top of the circular block. An arc-shaped plate is slidably installed inside the two movable slots. The two arc-shaped plates are connected to the movable slots by a spring. A strip-shaped protrusion is provided on the outer wall of the side of the two arc-shaped plates that are close to each other. Two protrusions are installed on the outer wall of the side of the two rubber scrapers that are close to each other. The ends of the two protrusions away from the rubber scrapers are adapted to the outer wall of the arc-shaped plates.

[0016] The beneficial effects of the present invention are: 1. In this invention, by setting a pretreatment mechanism, the inner wall of the crucible to be polished can be pre-polished by two polishing blocks before polishing, so that the subsequent polishing mechanism can perform chemical mechanical polishing on the inner wall of the crucible more efficiently, making the device more efficient in polishing large batches of inner wall of crucibles and shortening the processing cycle.

[0017] 2. In this invention, after the crucible has undergone chemical mechanical polishing, the first motor drives the rotating plate and the crucible to rotate 180 degrees together, causing the polishing liquid remaining on the inner wall of the crucible to be discharged downwards. On this basis, the two polishing blocks of the pretreatment mechanism can be controlled to rotate downwards to a horizontal state, exposing the two rubber scrapers. Then, the third electric telescopic rod is controlled to push the rotating block and the two rubber scrapers into the crucible. With the help of two telescopic adjustment mechanisms, the two rubber scrapers are driven to come into close contact with the inner wall of the crucible. As the second drive motor drives the two rubber scrapers to rotate inside the crucible, the two rubber scrapers can further scrape off and clean the polishing liquid adhering to the inner wall of the crucible, improving the efficiency of subsequent cleaning of the inner wall of the crucible.

[0018] 3. In this invention, after cleaning the polishing liquid from the inner wall of the crucible, the two rubber scrapers can be kept in close contact with the inner wall of the crucible. Then, the extension ends of the two first electric telescopic rods are controlled to retract together, so that the two clamps release the clamping limit on the outer wall of the crucible. As the extension end of the third electric telescopic rod slowly moves downward to reset, the crucible can be moved downward from the inside of the placement seat. It can also move away from the base along with the second slider inside the second slide groove, so that the relevant personnel can pick up the polished crucible from a distance from the device, improving the safety of the personnel when picking up and unloading the crucible.

[0019] 4. In this invention, after the polishing head of the polishing mechanism polishes the inner wall of a batch of crucibles, a small amount of debris and other impurities will inevitably adhere to its surface. At this time, the cooperation between the polishing mechanism and the pretreatment mechanism can be used to make the protrusions on the inner wall of the two arc-shaped plates abut against the outer wall of the polishing head. The polishing head is rotated by controlling the third motor, or the third electric telescopic rod and rotating block are rotated by the second drive motor, so that the polishing head rotates and rubs against the multiple protrusions on the inner wall of the two arc-shaped plates, and the impurities on the surface of the polishing head are automatically cleaned and removed. Attached Figure Description

[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 is a schematic diagram of the overall structure of a polishing device for the inner wall of a carbon-carbon composite crucible proposed in this invention; Figure 2 is a schematic diagram of the structure of Figure 1 from another angle; Figure 3 is a schematic diagram of the structure of the fixed frame in this invention; Figure 4 is a schematic diagram of the structure of the polishing mechanism in this invention; Figure 5 is a cross-sectional view of the structure of the moving plate and the shielding plate in Figure 4; Figure 6 is a cross-sectional view of the structure of the base in this invention; Figure 7 is a schematic diagram of the structure of the rotating frame in this invention; Figure 8 is a schematic diagram of the structure of the rectangular strip in this invention; Figure 9 is a schematic diagram of the structure of the pretreatment mechanism in this invention; Figure 10 is a schematic diagram of the structure of the telescopic adjustment mechanism in this invention; Figure 11 is a schematic diagram of the structure of one of the rubber scrapers and polishing blocks in this invention.

[0022] In the diagram: 1. Base; 2. Fixed frame; 3. Moving frame; 4. Polishing head; 5. Rotating frame; 6. Rotating plate; 7. Placement seat; 8. Placement slot; 9. First electric telescopic rod; 10. Clamping plate; 11. Rectangular strip; 12. Rotating block; 13. Notch; 14. First lead screw; 15. First slide groove; 16. Moving plate; 17. First slider; 18. Third motor; 19. Second electric telescopic rod; 20. Baffle plate; 21. Spray nozzle; 22. Second slide groove; 23. Second slider; 24. Third electric telescopic rod; 25. Rubber scraper; 26. Polishing block; 27. Arc plate; 28. Spring; 29. ​​Round block; 30. Moving slot; 31. Protrusion; 32. First rectangular slot; 33. Second lead screw; 34. Moving seat; 35. Rotating rod; 36. Second rectangular slot. Detailed Implementation

[0023] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Referring to Figures 1-11, a polishing device for the inner wall of a carbon-carbon composite crucible includes a base 1, a rotating frame 5 rotatably mounted on the top of the base 1, four rotating plates 6 rotatably mounted inside the rotating frame 5, and a clamping mechanism for clamping and fixing the crucible on the top of each of the four rotating plates 6. A fixing frame 2 is mounted on the outer wall of the base 1, and a movable frame 3 is provided outside the fixing frame 2. A polishing mechanism for polishing the inner wall of the crucible is installed inside the movable frame 3. A notch 13 is opened inside the base 1, and a rectangular strip 11 is rotatably mounted inside the notch 13. A pretreatment mechanism for pre-treating the inner wall of the crucible is provided on the top of the rectangular strip 11.

[0025] As an optimized technical solution of the present invention, the clamping mechanism includes a placement seat 7 rotatably mounted on the top of the rotating plate 6. The placement seat 7 has a placement groove 8 inside. Vertical plates are installed at both ends of the top of the placement seat 7. First electric telescopic rods 9 are installed on the outer walls of the two vertical plates on opposite sides. The telescopic ends of the two first electric telescopic rods 9 pass through the corresponding vertical plates and are connected to clamping plates 10. After the crucible is placed inside the placement groove 8, controlling the telescopic ends of the two first electric telescopic rods 9 to extend together can drive the two clamping plates 10 to clamp and fix the crucible.

[0026] As a technical optimization of the present invention, a first motor is installed on each of the four sides of the rotating frame 5. The output ends of the four first motors are respectively connected to the rotating parts of one end of the corresponding rotating plate 6. A second motor is installed on the bottom of each of the four rotating plates 6, and the output ends of the second motors pass through the rotating plate 6 and are connected to the placement seat 7. As shown in Figure 7, after the first motor is started, it can drive the rotating plate 6 and other components to rotate and adjust inside the rotating frame 5; after the second motor is started, it can drive the placement seat 7 and the clamped and fixed crucible to rotate and adjust together.

[0027] As a technical optimization of the present invention, a groove is provided on the outer wall of the fixed frame 2 away from the base 1. A first lead screw 14 is rotatably installed inside the groove, and the movable frame 3 is threadedly engaged with the outer wall of the first lead screw 14. As shown in Figure 3, a first drive motor is preset inside or on the top of the fixed frame 2. The output end of the first drive motor is connected to one end of the first lead screw 14, thereby driving the first lead screw 14 to rotate inside the groove, and consequently driving the movable frame 3 to move up and down on the surface of the fixed frame 2 for adjustment.

[0028] As a technical optimization of the present invention, the polishing mechanism includes first grooves 15 opened on the inner walls of both sides of the movable frame 3. First sliders 17 are installed inside each of the two first grooves 15. A movable plate 16 is installed at the end of each of the two first sliders 17 away from the first groove 15. A third motor 18 is installed on the top of the movable plate 16, and the output end of the third motor 18 passes through the movable plate 16 and is connected to a polishing head 4. First linear motors are pre-installed inside each of the two first grooves 15. The two first linear motors drive the two first sliders 17 to move back and forth inside their respective first grooves 15, thereby causing the movable plate 16 and other components to move back and forth within the movable frame 3 for adjustment. After starting, the third motor 18 can drive the polishing head 4 to rotate at high speed, facilitating mechanical polishing of the inner wall of the crucible.

[0029] As a technical optimization of the present invention, a plurality of second electric telescopic rods 19 are installed on the top of the movable plate 16. The telescopic ends of the plurality of second electric telescopic rods 19 all pass through the movable plate 16 and are connected to a baffle plate 20. A nozzle 21 for connecting to an external polishing liquid delivery pipe is installed inside the movable plate 16. An elastic cover is provided inside the baffle plate 20, and the bottom end of the nozzle 21 extends downward from inside the elastic cover. An externally preset spraying device delivers polishing liquid to the nozzle 21 and sprays it onto the inner wall of the crucible from the bottom end of the nozzle 21, thereby performing a chemical mechanical polishing treatment on the inner wall of the crucible in conjunction with the polishing head 4 mentioned above. During the telescopic process of the plurality of second electric telescopic rods 19, the baffle plate 20 can be moved up and down at the bottom of the movable plate 16 for adjustment. Since holes are opened inside the baffle plate 20 and an elastic cover is provided inside the holes, the nozzle 21 does not obstruct the up and down movement of the baffle plate 20 without affecting the use of the nozzle 21.

[0030] As a technical optimization of the present invention, a fourth motor and a fifth motor are respectively installed inside the base 1, and the output ends of the fourth motor and the fifth motor are respectively connected to the rotating parts of the rotating frame 5 and the rectangular strip 11. After starting, the fourth motor and the fifth motor can respectively drive the rotating frame 5 and the rectangular strip 11 to rotate and adjust.

[0031] As an optimized technical solution of the present invention, the pretreatment mechanism includes a second slide groove 22 opened at the top of the rectangular strip 11. A second slider 23 is installed inside the second slide groove 22. A third electric telescopic rod 24 is rotatably installed at the top of the second slider 23. A rotating block 12 is installed at the telescopic end of the third electric telescopic rod 24. The rotating block 12 is connected to a rubber scraper 25 through a telescopic adjustment mechanism provided on both sides. Polishing blocks 26 are rotatably installed on the surfaces of the two rubber scrapers 25. A second linear motor is preset inside the second slide groove 22. The second linear motor can drive the second slider 23 to move back and forth inside the second slide groove 22, thereby driving the rotating block 12 and other components to move and adjust. A second drive motor is preset inside the second slider 23. The output end of the second drive motor is connected to the third electric telescopic rod 24, thereby driving the rotating block 12 and other components to rotate and adjust. A fourth drive motor is preset inside each of the two rubber scrapers 25. The output ends of the two fourth drive motors are respectively connected to the rotating parts of one end of the polishing block 26, thereby driving the two polishing blocks 26 to rotate and adjust on the surface of the rubber scrapers 25.

[0032] As a technical optimization of the present invention, the telescopic adjustment mechanism includes two rotating rods 35 disposed between the rubber scraper 25 and the rotating block 12. The central parts of the two rotating rods 35 are rotatably connected by a connecting shaft. The outer walls of the rotating block 12 and the rubber scraper 25 are respectively provided with a first rectangular groove 32 and a second rectangular groove 36. Movable seats 34 are slidably installed inside the first rectangular groove 32 and the second rectangular groove 36. One end of the two rotating rods 35 is rotatably connected to the two movable seats 34 respectively. A second lead screw 33 is rotatably installed inside the first rectangular groove 32. One of the movable seats 34 is threadedly connected to the outer wall of the second lead screw 33. The other ends of the two rotating rods 35 are respectively hinged to the outer walls of the rubber scraper 25 and the rotating block 12. As shown in Figure 10, multiple third drive motors are pre-installed inside the rotating block 12. The output ends of the multiple third drive motors are respectively connected to one end of the corresponding second lead screw 33, thereby driving the multiple second lead screws 33 to rotate inside the corresponding first rectangular groove 32. When the second lead screw 33 rotates and drives the moving seat 34 on its surface to move up or down for adjustment, it can drive the two rotating rods 35 that are rotatably connected, causing the angle of rotation between the two rotating rods 35 to increase or decrease, thereby driving the rubber scraper 25 to move and adjust in a direction away from or close to the rotating block 12, so as to achieve the effect of telescopic adjustment of the rubber scraper 25.

[0033] As a technical optimization of the present invention, a circular block 29 is installed at the top of the rotating block 12. Two movable grooves 30 are formed at the top of the circular block 29. An arc-shaped plate 27 is slidably installed inside each of the two movable grooves 30. The two arc-shaped plates 27 are connected to the movable grooves 30 by springs 28. A strip-shaped protrusion is provided on the outer wall of the side of the two arc-shaped plates 27 that is close to each other. Two protrusions 31 are installed on the outer wall of the side of the two rubber scrapers 25 that is close to each other. The ends of the two protrusions 31 away from the rubber scrapers 25 are adapted to the outer wall of the arc-shaped plate 27. The distance between the two arc-shaped plates 27 is adapted to the outer diameter of the polishing head 4 mentioned above. When the telescopic adjustment mechanism drives the rubber scrapers 25 to move towards the rotating block 12, it can drive the two protrusions 31 to push the adjacent arc-shaped plates 27.

[0034] In this embodiment, the surfaces of the first electric telescopic rod 9, the second electric telescopic rod 19, the third electric telescopic rod 24, the second lead screw 33, and other driving components are all fitted with an elastically retractable protective cover to prevent impurities generated during the polishing process from falling onto the surfaces of these components and affecting their normal use.

[0035] In this invention, when the user uses the device, as shown in Figures 1 and 2, the crucible to be polished is placed inside one of the placement slots 8 on the front of the rotating frame 5. The telescopic ends of the two first electric telescopic rods 9 are extended together, causing the two clamping plates 10 to clamp and fix the outer wall of the crucible. Then, the fourth motor is controlled to drive the rotating frame 5 to rotate 90 degrees clockwise, causing the second rotating plate 6 to rotate to the front of the device. The second crucible is placed inside the placement slot 8 on the top of the rotating plate 6, and the two clamping plates 10 are used to clamp and fix it by means of the telescopic ends of the corresponding two first electric telescopic rods 9. The third and fourth crucibles are then processed by repeating the above steps, so that the four clamping mechanisms inside the rotating frame 5 clamp and install crucibles respectively. At this time, the first The clamped crucible rotates to directly below the polishing mechanism. By controlling the first lead screw 14, the moving frame 3 and the polishing mechanism move downward together, allowing the polishing head 4 to extend into the crucible. Then, the third motor 18 drives the polishing head 4 to rotate at high speed, and the externally preset spraying device is activated, so that the spray nozzle 21 can first spray the polishing liquid onto the inner wall surface of the crucible to form a chemical polishing treatment on the inner wall of the crucible. Then, by adjusting the lateral movement of the two first sliders 17 inside the first slide groove 15, and by adjusting the longitudinal movement of the moving frame 3 driven by the first lead screw 14, the polishing head 4 comes into contact with the inner wall of the crucible. In conjunction with the second motor, the placement seat 7 and the crucible rotate slowly together, so that the polishing head 4 can perform a comprehensive chemical mechanical polishing treatment on the inner wall of the crucible.

[0036] During the polishing process of the above-mentioned polishing mechanism on the inner wall of the crucible, as the nozzle 21 continuously sprays polishing liquid onto the inner wall of the crucible, it will accumulate inside the crucible. At this time, the operator needs to insert the hose connected to the liquid pump into the crucible to remove and clean the accumulated polishing liquid, so as to avoid the polishing liquid accumulating to a depth that is too high and will affect the polishing process of the polishing head 4 on the inner wall of the crucible.

[0037] After polishing, the crucible will be rotated 90 degrees clockwise by the fourth motor to rotate the rotating frame 5 to the front of the device. At this time, it will be removed from the top of the placement seat 7, and the next crucible to be polished will be placed on the top of the placement seat 7 to form a continuous processing effect on multiple crucibles whose inner walls need to be polished, thereby improving the polishing efficiency of the device for multiple crucibles.

[0038] After the crucible is placed on top of the placement seat 7, the polishing mechanism is still polishing the inner walls of other crucibles. The first motor can be controlled to rotate the placement seat 7 and the crucible 180 degrees within the rotating frame 5, causing the crucible to be inverted. Then, the second slider 23 is controlled to move the pretreatment mechanism directly below the crucible within the second slide groove 22. The extension end of the third electric telescopic rod 24 is extended upwards, pushing the rotating block 12 and other components into the crucible. The two telescopic adjustment mechanisms on both sides of the rotating block 12 push the two rubber scrapers 25 and the polishing block 26 in opposite directions, causing the two polishing blocks to... The outer wall of block 26 on the side furthest from each other is in close contact with the inner wall of the crucible. As the two telescopic adjustment mechanisms continue to control the movement of the two rubber scrapers 25 and the polishing block 26, the two polishing blocks 26 push and press against the inner wall of the crucible to check whether the strength of the crucible to be polished is qualified. The second drive motor can drive the third electric telescopic rod 24 and the rotating block 12 to rotate and adjust, so that the two polishing blocks 26 can apply pressure to different positions inside the crucible, improving the comprehensiveness of the crucible strength test. This avoids the crucible with unqualified strength or internal cracks from continuing to be polished, which may cause it to break during the processing and affect the operation of the device.

[0039] After the crucible passes the strength test, the two telescopic adjustment mechanisms can be controlled to drive the two polishing blocks 26 to a state of slight contact with the inner wall of the crucible. This ensures that the second drive motor can drive the third electric telescopic rod 24, the rotating block 12, and the two polishing blocks 26 to rotate flexibly. As the outer wall of the two polishing blocks 26 moves away from each other and continuously rotates and rubs against the inner wall of the crucible, the inner wall of the crucible to be polished can be pre-polished, so that the subsequent polishing mechanism can perform chemical mechanical polishing on the inner wall of the crucible more efficiently.

[0040] After pretreatment, the crucible is rotated and reset to its original state inside the rotating frame 5 by the first motor, driven by the placement seat 7 and the crucible. The rotating frame 5 then rotates the crucible to a position below the polishing mechanism, where the polishing mechanism performs chemical mechanical polishing on the inner wall of the crucible. During the polishing process, some polishing liquid will splash outward from the top opening of the crucible. After the polishing head 4 is inserted into the crucible for polishing, the extension ends of multiple second electric telescopic rods 19 are controlled to extend downward together, pushing the baffle plate 20 downward to cover the top of the crucible, thus blocking and protecting the splashed polishing liquid. The liquid is then concentrated and drawn out by the pre-set pump, improving the cleanliness and safety of the polishing process on the inner wall of the crucible.

[0041] After the crucible has undergone chemical mechanical polishing, the rotating frame 5 rotates it to the front of the device. At this point, the first motor can be controlled to rotate the rotating plate 6 and the crucible 180 degrees together, causing the polishing liquid remaining on the inner wall of the crucible to drain downwards. On this basis, the two polishing blocks 26 can be controlled to rotate downwards to a horizontal state as shown in Figure 11, exposing the two rubber scrapers 25. Then, the telescopic end of the third electric telescopic rod 24 is controlled to extend upwards again, pushing the rotating block 12 and the two rubber scrapers 25 into the crucible. With the help of the two telescopic adjustment mechanisms, the two rubber scrapers 25 are driven to come into close contact with the inner wall of the crucible. As the second drive motor drives the two rubber scrapers 25 to rotate inside the crucible, the two rubber scrapers 25 can further scrape off and clean the polishing liquid adhering to the inner wall of the crucible, improving the efficiency of subsequent cleaning of the inner wall of the crucible.

[0042] After cleaning the polishing liquid from the inner wall of the crucible, the two rubber scrapers 25 are kept in close contact with the inner wall of the crucible. Then, the telescopic ends of the two first electric telescopic rods 9 are retracted together, so that the two clamps 10 are released from the clamping limit on the outer wall of the crucible. As the telescopic end of the third electric telescopic rod 24 slowly moves downward to reset, the crucible can be moved downward from the inside of the placement seat 7. It can also move away from the base 1 along with the second slider 23 inside the second slide groove 22. This makes it easier for relevant personnel to pick up the polished crucible from a distance from the device, improving the safety of personnel when picking up and unloading the crucible.

[0043] After polishing the inner walls of a batch of crucibles, the polishing head 4 of the polishing mechanism will inevitably have a small amount of debris and other impurities adhering to its surface. At this time, the fifth motor can be controlled to drive the rectangular strip 11 to rotate inside the notch 13 to directly below the fixed frame 2. Then, the first lead screw 14 drives the moving frame 3 and the polishing mechanism to move downward together, and the two first sliders 17 are controlled to move and adjust inside the first slide groove 15, or the second slider 23 is controlled to move and adjust inside the second slide groove 22. After ensuring that the rotating block 12 is directly below the polishing head 4, the telescopic end of the third electric telescopic rod 24 is controlled to move upward until the top of the rotating block 12 moves to the position of the polishing head 4. After the bottom ends of the two arc-shaped plates 27 are in contact with each other, they are located on both sides of the polishing head 4. As the two telescopic adjustment mechanisms drive the two rubber scrapers 25 to move towards each other, the protrusions 31 on the outer wall of the side of the two rubber scrapers 25 that are close to each other can push the arc-shaped plates 27, causing the protrusions on the inner walls of the two arc-shaped plates 27 to abut against the outer wall of the polishing head 4. By controlling the third motor 18 to drive the polishing head 4 to rotate, or by driving the third electric telescopic rod 24 and the rotating block 12 to rotate through the second drive motor, the polishing head 4 rotates and rubs against the multiple protrusions on the inner walls of the two arc-shaped plates 27, automatically cleaning and removing impurities from the surface of the polishing head 4.

[0044] If the polishing head 4 needs to be disassembled and replaced, the two telescopic adjustment mechanisms can be controlled to move the two rubber scrapers 25 toward each other. The two protrusions 31 further push the two arc plates 27 to ensure that the two arc plates 27 are in close contact with the outer wall of the polishing head 4 and have a clamping and fixing effect on the outer wall of the polishing head 4. As the rotating block 12 drives the two arc plates 27 to rotate and adjust slowly, the telescopic end of the third electric telescopic rod 24 slowly retracts back to its original position, thereby achieving the automatic loosening and disassembly of the polishing head 4 and further improving the applicability of the pretreatment mechanism.

[0045] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A polishing device for the inner wall of a carbon-carbon composite crucible, comprising a base (1), characterized in that, A rotating frame (5) is rotatably mounted on the top of the base (1). Four rotating plates (6) are rotatably mounted inside the rotating frame (5). Each of the four rotating plates (6) is provided with a clamping mechanism for clamping and fixing the crucible. A fixing frame (2) is installed on the outer wall of the base (1). A movable frame (3) is provided outside the fixing frame (2). A polishing mechanism for polishing the inner wall of the crucible is installed inside the movable frame (3). A notch (13) is opened inside the base (1). A rectangular strip (11) is rotatably mounted inside the notch (13). A pretreatment mechanism for pre-treating the inner wall of the crucible is provided on the top of the rectangular strip (11).

2. The polishing equipment for the inner wall of a carbon-carbon composite crucible according to claim 1, characterized in that, The clamping mechanism includes a placement seat (7) rotatably mounted on the top of the rotating plate (6). The placement seat (7) has a placement groove (8) inside. Vertical plates are installed at both ends of the top of the placement seat (7). A first electric telescopic rod (9) is installed on the outer wall of the side of the two vertical plates that are far apart. The telescopic ends of the two first electric telescopic rods (9) pass through the corresponding vertical plates and are connected to clamping plates (10).

3. The polishing equipment for the inner wall of a carbon-carbon composite crucible according to claim 2, characterized in that, The rotating frame (5) is equipped with a first motor on each of its four sides. The output ends of the four first motors are connected to the rotating parts of the corresponding rotating plates (6) at one end. The bottom of each of the four rotating plates (6) is equipped with a second motor. The output ends of the second motors pass through the rotating plates (6) and are connected to the placement base (7).

4. The polishing equipment for the inner wall of a carbon-carbon composite crucible according to claim 1, characterized in that, The fixed frame (2) has a groove on the outer wall away from the base (1), and the first lead screw (14) is rotatably installed inside the groove. The movable frame (3) is threadedly engaged with the outer wall of the first lead screw (14).

5. A polishing device for the inner wall of a carbon-carbon composite crucible according to claim 1, characterized in that, The polishing mechanism includes first grooves (15) opened on the inner walls of both sides of the movable frame (3). First sliders (17) are installed inside the two first grooves (15). A movable plate (16) is installed at the end of the two first sliders (17) away from the first grooves (15). A third motor (18) is installed on the top of the movable plate (16). The output end of the third motor (18) passes through the movable plate (16) and is connected to a polishing head (4).

6. A polishing device for the inner wall of a carbon-carbon composite crucible according to claim 5, characterized in that, The top of the movable plate (16) is equipped with a plurality of second electric telescopic rods (19). The telescopic ends of the plurality of second electric telescopic rods (19) pass through the movable plate (16) and are connected to a shield plate (20). The inside of the movable plate (16) is equipped with a nozzle (21) for connecting to an external polishing liquid delivery pipe. An elastic cover is provided inside the shield plate (20), and the bottom end of the nozzle (21) extends downward from inside the elastic cover.

7. A polishing device for the inner wall of a carbon-carbon composite crucible according to claim 1, characterized in that, The base (1) is equipped with a fourth motor and a fifth motor, respectively. The output ends of the fourth motor and the fifth motor are connected to the rotating parts of the rotating frame (5) and the rectangular strip (11), respectively.

8. A polishing device for the inner wall of a carbon-carbon composite crucible according to claim 1, characterized in that, The pretreatment mechanism includes a second groove (22) opened on the top of the rectangular strip (11), a second slider (23) installed inside the second groove (22), a third electric telescopic rod (24) rotatably installed on the top of the second slider (23), a rotating block (12) installed on the telescopic end of the third electric telescopic rod (24), and a rubber scraper (25) connected to the rotating block (12) through a telescopic adjustment mechanism set on both sides. A polishing block (26) is rotatably installed on the surface of both rubber scrapers (25).

9. A polishing device for the inner wall of a carbon-carbon composite crucible according to claim 8, characterized in that, The telescopic adjustment mechanism includes two rotating rods (35) arranged between the rubber scraper (25) and the rotating block (12). The central part of the two rotating rods (35) is rotatably connected by a connecting shaft. The outer wall of the rotating block (12) and the rubber scraper (25) is respectively provided with a first rectangular groove (32) and a second rectangular groove (36). The first rectangular groove (32) and the second rectangular groove (36) are slidably installed with movable seats (34) inside. One end of the two rotating rods (35) is rotatably connected to the two movable seats (34) respectively. The first rectangular groove (32) is rotatably installed with a second lead screw (33). One of the movable seats (34) is threadedly connected to the outer wall of the second lead screw (33). The other end of the two rotating rods (35) is hinged to the outer wall of the rubber scraper (25) and the rotating block (12) respectively.

10. A polishing device for the inner wall of a carbon-carbon composite crucible according to claim 9, characterized in that, The top of the rotating block (12) is equipped with a round block (29). The top of the round block (29) has two moving grooves (30). The interior of the two moving grooves (30) is slidably equipped with an arc plate (27). The two arc plates (27) and the moving grooves (30) are connected by a spring (28). The outer wall of the two arc plates (27) that are close to each other is provided with a strip-shaped protrusion. The outer wall of the two rubber scrapers (25) that are close to each other is equipped with two protrusions (31). The end of the two protrusions (31) that is away from the rubber scraper (25) is adapted to the outer wall of the arc plate (27).

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