Rotary objective table and polishing device

Abstract

The invention relates to the technical field of metal polishing, discloses a rotary objective table and a polishing device, and solves the problems that when an existing objective table is used for assembling a metal cover, firm fixation and convenient correction are difficult to consider at the same time, the metal cover is inconvenient to be polished by a polishing wheel in a preset state, and then the polishing precision of the metal cover is influenced. The metal cover in a static state is supported with low friction force through the second backing ring and the third backing ring, so that when the placement direction of the metal cover is inclined and needs to be adjusted, the limitation of friction force on the metal cover is small, and the placement state of the metal cover is convenient to adjust; the balancing weight actively pulls down the pull ring under the action of centrifugal force, the rubber film is promoted to deform downwards, negative pressure is formed in the closed space on the inner side of the lifting cover, and therefore the metal cover is firmly adsorbed and fixed to the upper side of the lifting cover.

Description

Technical Field

[0001] The present invention relates to the technical field of metal polishing, in particular to a rotating stage and a polishing device. Background Art

[0002] Polishing the inner wall of a hemispherical metal cover (such as a metal cookware) typically involves a stage and polishing wheel. The stage secures the metal cover and drives its coaxial rotation, while the polishing wheel polishes the rotating inner wall. As the metal cover rotates, surfaces of the same circumference of the inner wall follow the same rotational path. Multiple polishing wheels are typically used, each corresponding to a rotating surface of a different portion of the metal cover's inner wall, forming a matching arc. Multiple polishing wheels polish different circumferential surfaces of the metal cover's inner wall, effectively covering the entire inner surface.

[0003] The inner side of the stage is designed with a groove that mates with the outer surface of the metal cover, and the groove is covered with a friction material (such as a rubber pad). As the stage rotates, the friction material contacts the metal cover, causing the metal cover to rotate with the stage through friction. However, the metal cover is relatively light, so the friction coefficient and contact area between the friction material and the metal cover need to be increased to ensure sufficient friction between the two. However, this design also brings a new problem: after the metal cover is placed in the groove, it needs to be corrected to ensure that the same circumferential surface of the metal cover's inner wall is on the same rotational path. If the static friction between the metal cover and the friction material is too high, the difficulty of correcting the metal cover will increase significantly. If the correction is insufficient, the metal cover will wobble during rotation, resulting in uneven contact between the polishing wheel and the metal cover's inner wall, which in turn affects the polishing accuracy.

[0004] Conversely, if the static friction between the metal cover and the friction material is insufficient, the metal cover will become unstable when the stage rotates. Under the high-speed rotation and the grinding action of the polishing wheel, the metal cover is prone to shifting, which also affects polishing accuracy. Therefore, existing stages cannot simultaneously meet the requirements of secure fixation and easy adjustment when securing the metal cover. This prevents the metal cover from being polished by the polishing wheel in the desired state, seriously affecting the polishing accuracy of the metal cover's inner wall. Summary of the Invention

[0005] The purpose of the present invention is to provide a rotating stage and polishing device to solve the problem that the existing stage is difficult to assemble the metal cover at the same time, making it difficult to firmly fix and conveniently adjust the metal cover, and making it inconvenient for the metal cover to be polished by the polishing wheel in a preset state, thereby affecting the polishing accuracy of the metal cover.

[0006] To achieve the above object, the present invention provides the following technical solution: a rotating stage, comprising: A rotating table, a motor for driving the rotating table is provided on the lower side; The suction cup assembly is coaxially assembled on the upper side of the rotating table. The suction cup assembly includes a lifting cover arranged in an annular shape. The two upper edges of the upper side of the lifting cover are respectively provided with a supporting ring 2 and a supporting ring 3. The radius and position of the supporting ring 2 and the supporting ring 3 are adapted to seal and fit with the lower surface of the metal cover in a preset state. A rubber membrane is also sealed on the lower side of the lifting cover. A pull ring is provided on the lower side of the rubber membrane. The pull ring pulls the rubber membrane downward to deform. The pulling mechanism is coaxially assembled on the upper side of the rotating table. The pulling mechanism includes a fixed seat, a rotating frame is rotatably provided on the edge of the fixed seat, one end of the rotating frame is connected to a counterweight block, one side of the rotating frame is provided with a tension spring for pulling it to be retracted on the side of the fixed seat, and the other end of the rotating frame is provided with a pulling assembly for pulling down the pull ring. The pulling assembly is driven by the centrifugal swing of the rotating frame when the rotating table rotates; The second and third support rings support the metal cover in a stationary state with low friction. When the turntable rotates, the pulling mechanism pulls the pull ring, forcing the support cover to further fix the metal cover on the upper side of the support cover through negative pressure.

[0007] As a further description of the above technical solution: the rotating frame is rotatably assembled on the fixed seat through a swivel fixedly connected at one end, the pulling assembly includes a brake line arranged on one side of the swivel, and a pull block 1 is fixedly arranged on the arc surface of the swivel, one end of the wire core of the brake line is fixedly connected to the outer end of the pull block 1, and the other end is used to drive the pull ring to move downward.

[0008] As a further description of the above technical solution: the arc surface of the rotating ring is further fixedly provided with a second pulling block, and one end of the tension spring is fixedly connected to the outer end of the second pulling block; There are multiple rotating racks, which are circumferentially distributed on the upper surface of the fixing seat.

[0009] As a further description of the above technical solution: a gear ring 1 is coaxially fixedly connected to the lower side of the rotating ring, and a gear ring 2 is rotatably connected to the upper side of the fixed seat, and the gear ring 2 is engaged with multiple gear rings 1 at the same time.

[0010] As a further description of the above technical solution: the lifting cover is fixedly connected to a support frame through the outer surface, and there are multiple support frames, which fix the lifting cover above the rotating table.

[0011] As a further description of the above technical solution: the upper surface of the rotating table is provided with an outer cover that covers the lifting cover inside, and the upper edge of the outer cover is fixed with a supporting ring 1, which fits the outer edge of the metal cover in a preset state.

[0012] As a further description of the above technical solution: the upper edge of the outer cover is provided with a calibration component for calibrating the metal cover, and at least three calibration components are provided and distributed circumferentially; The support frame is equipped with a control component, which is connected to one end of the brake line. When the brake line pulls the control component, it first drives the calibration component and then drives the pull ring. The plurality of brake lines, support frames, control components and the plurality of calibration components correspond one to one.

[0013] As a further description of the above technical solution: the calibration assembly includes a sleeve fixedly assembled on the upper edge of the outer cover, a pull rod movably provided on the inner side of the sleeve, a tension spring 2 for pulling the pull rod upward is fixedly provided on the lower surface of the sleeve, and a pressure block is fixedly connected to the upper end of the pull rod; Driven by the control assembly, the plurality of pull rods move downward and push the upper edge of the metal cover through the pressing block.

[0014] As a further description of the above technical solution: the control component includes a cross bar, one end of the cross bar is connected to the lower end of the pull rod through pull rope 1, and the other end of the cross bar is connected to the lower surface of the pull ring through pull rope 2. One end of the brake line core is connected to the lower surface of the cross bar, and its connection position is close to pull rope 1. The side surface of the cross bar close to the end of pull rope 1 is also connected to a rotating column, and a limiting plate is fixedly connected to one side of the support frame, and a limiting groove is provided on the surface of the limiting plate for guiding the moving range of the rotating column.

[0015] A polishing device comprises a reversing mechanism and a grinding mechanism; The reversing mechanism includes a rotating seat rotatably assembled on the machine platform, a rotating arm is fixedly provided on the rotating shaft surface of the rotating seat, and an electric cylinder 1 is connected to the outer end of the rotating arm to drive it to rotate; The grinding mechanism is provided with multiple ones and distributed around the rotating seat. The grinding mechanism includes a hinge frame, a rotating plate on the upper side of the hinge frame is fixedly equipped with a second motor, a fixed plate on the lower side of the hinge frame is fixedly arranged on the machine platform, and one side of the fixed plate is provided with a second electric cylinder for driving the rotating plate to rotate. The output end of the second motor is connected to a grinding wheel, and the friction surface of the grinding wheel is movably adapted to fit the preset position of the inner surface of the metal cover; A rotating stage is mounted on the rotating seat.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. When the lifting cover is in a stationary state, it only relies on the second and third support rings to provide low-friction support to the metal cover, so that when the placement of the metal cover is tilted and needs to be adjusted, the friction force has little restriction on it, which facilitates the adjustment of the placement state of the metal cover. After the metal cover is adjusted to the preset state, the turntable is started to rotate, and the counterweight block actively pulls down the pull ring under the action of centrifugal force, causing the rubber membrane to deform downward, so that the enclosed space inside the lifting cover forms a negative pressure, thereby firmly adsorbing and fixing the metal cover to the upper side of the lifting cover.

[0017] 2. As the rotation speed of the turntable increases, the centrifugal force of the counterweight increases, generating greater mechanical energy to drive the pulling assembly, which increases the pulling force acting on the pull ring and the deformation of the rubber membrane, thereby increasing the negative pressure suction of the lifting cover, ensuring the stability of the metal cover under high-speed rotation and enhancing the fixing effect.

[0018] 3. After polishing is completed, when the turntable stops rotating, the rotating frame is reset under the pull of the tension spring, the pulling force of the pulling component on the pull ring gradually decreases to the initial state, the deformation of the rubber membrane is restored, and the negative pressure suction force of the lifting cover on the metal cover is automatically reduced. This process simplifies the operation and improves the unloading efficiency of the metal cover after polishing.

[0019] 4. When the turntable rotates, the pulling mechanism causes the multiple brake lines to pull in the same displacement, and the crossbar movement state remains synchronized. When the lifting cover does not generate negative pressure, multiple pressure blocks first descend to the preset height to automatically calibrate the metal cover. After calibration, the rubber membrane deformation is automatically controlled to enhance the negative pressure suction and firmly adsorb the metal cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall side structure of the present invention; Figure 3 This is a schematic diagram of the structure of the rotating stage and the metal cover of the present invention; Figure 4 Schematic diagram of the cross-sectional structure of the rotating stage and the metal cover of the present invention; Figure 5 Schematic diagram of the cross-sectional structure of the rotating stage of the present invention; Figure 6 Schematic diagram of the rotating stage of the present invention; Figure 7 This is a schematic diagram of the mounting ring, the suction cup assembly, and the metal cover of the present invention; Figure 8 It is a schematic structural diagram of the pulling mechanism of the present invention; Figure 9 It is a schematic diagram of the structure of the rotating frame of the present invention; Figure 10 It is a schematic diagram of the structure of the calibration component and the control component of the present invention.

[0021] In the figure: 10, rotating table; 11, outer cover; 12, support ring 1; 13, motor 1; 20. Suction cup assembly; 21. Lifting cover; 22. Second support ring; 23. Third support ring; 24. Rubber membrane; 25. Pull ring; 26. Support frame; 30. Pulling mechanism; 31. Fixed seat; 32. Rotating frame; 321. Swivel; 322. Pull block 1; 323. Pull block 2; 324. Gear ring 1; 33. Counterweight; 34. Brake line; 35. Gear ring 2; 36. Tension spring 1; 40. Calibration assembly; 41. Sleeve; 42. Pull rod; 43. Pressure block; 44. Extension spring 2; 50. Control assembly; 51. Crossbar; 52. Pull rope 1; 53. Rotating column; 54. Limit plate; 55. Limit slot; 56. Pull rope 2; 60. Reversing mechanism; 61. Rotating seat; 62. Rotating arm; 63. Electric cylinder 1; 70. Grinding mechanism; 71. Motor 2; 72. Grinding wheel; 73. Hinge; 74. Electric cylinder 2. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0024] Combine Figures 1-10 , a rotating stage, comprising: A rotating table 10, with a motor 13 driving the rotating table 10 to rotate provided on its lower side; Suction cup assembly 20 is coaxially mounted on the upper side of rotating stage 10. Suction cup assembly 20 comprises an annular support cover 21. A second support ring 22 and a third support ring 23 are respectively mounted on the upper edges of support cover 21. The radius and position of support rings 22 and 23 are adapted to seal the lower surface of the metal cover in its preset state. The preset state of the metal cover means that when the metal cover is placed within the rotating stage and rotates with it, the inner surface of the metal cover, along the same circumference, lies on the same rotational path.

[0025] A rubber membrane 24 is sealed against the underside of the lifting cover 21. A hole is provided on the support beam surface inside the lifting cover 21, connecting the spaces above and below the support beam. A pull ring 25 is located beneath the rubber membrane 24, which pulls the rubber membrane 24 downward to deform it. When the metal cover is placed on the lifting cover 21 in the preset position, the second and third support rings 22 and 23 come into sealed contact with the metal cover's underside, automatically forming a closed space within the lifting cover 21.

[0026] Specifically, when the support cover 21 is stationary, the metal cover is supported only by the second and third support rings 22 and 23, and the friction between them is relatively low. If the metal cover needs to be adjusted due to a tilt, this friction has a minimal restrictive effect, facilitating adjustment of the metal cover's placement.

[0027] Furthermore, after the metal cover is adjusted to a preset position on the upper side of the lifting cover 21, the pull ring 25 is simply pulled downward to cause the rubber membrane 24 to deform downward. At this time, the enclosed space inside the lifting cover 21 will form a negative pressure, so that the metal cover is firmly adsorbed and fixed on the upper side of the lifting cover 21.

[0028] Combine Figure 3-Figure 8 Since the rotating platform 10 rotates at high speed, it is not suitable to use an electrical control method for the structure used to pull the pull ring 25 downward. If the electrical structure is assembled on the rotating platform 10, a corresponding power supply system will need to be set up separately, which will not only increase the manufacturing cost but also increase the subsequent maintenance burden.

[0029] To address the above issues, the present invention provides a pulling mechanism 30 coaxially mounted on the upper side of the rotating platform 10. Specifically, the pulling mechanism 30 includes a fixed base 31, with a rotating frame 32 pivotally mounted on the edge of the fixed base 31. A counterweight 33 is connected to one end of the rotating frame 32, and a pulling assembly for pulling down the pull ring 25 is provided at the other end. A tension spring 36 is provided on one side of the rotating frame 32 to pull the rotating frame 32 toward the side of the fixed base 31. The pulling assembly is driven by the centrifugal oscillation of the rotating frame 32 generated by the rotation of the rotating platform 10.

[0030] Once the metal cover is adjusted to the preset position above the lifting cover 21, the motor 13 can be directly activated to start the rotating platform 10. At this point, the centrifugal force of the counterweight 33 overcomes the elastic force of the tension spring 1 36, causing the rotating frame 32 to deflect outward, thereby generating mechanical energy. Ultimately, the pulling assembly uses this mechanical energy to pull the pull ring 25 downward, achieving control over the pull of the pull ring 25.

[0031] It's worth noting that as the rotational speed of the rotating platform 10 increases, the centrifugal force of the counterweight 33 also increases, generating greater mechanical energy to drive the pulling assembly. This increases the pulling force on the pull ring 25, facilitating greater deformation of the rubber membrane 24, and thus increasing the negative pressure suction of the lifting cover 21. This not only ensures the stability of the metal cover under high-speed rotation, but also further enhances its fixing effect.

[0032] After the metal cover is polished and the rotating platform 10 returns to a stationary state, the rotating frame 32 gradually returns to its original position under the pull of the tension spring 1 36. Accordingly, the tension of the pulling assembly on the pull ring 25 gradually decreases until it returns to its initial state. At this point, the deformation of the rubber membrane 24 recovers, automatically reducing the negative pressure suction force exerted by the lifting cover 21 on the metal cover. This process not only simplifies operation but also significantly improves the efficiency of unloading the polished metal cover.

[0033] Combine Figure 8-Figure 9 The rotating frame 32 is rotatably assembled on the fixed seat 31 through a swivel 321 fixedly connected at one end. The pulling assembly includes a brake line 34 set on one side of the swivel 321. A pull block 322 is fixedly set on the arc surface of the swivel 321. One end of the wire core of the brake line 34 is fixedly connected to the outer end of the pull block 322, and the other end is used to drive the pull ring 25 to move downward. The wire sleeve of the brake line 34 is fixedly set on the surface of the rotating table 10 by a buckle.

[0034] The arc surface of the rotating ring 321 is also fixedly provided with a second pulling block 323, and one end of the tension spring 1 36 is fixedly connected to the outer end of the second pulling block 323; A plurality of rotating racks 32 are provided and distributed circumferentially on the upper surface of the fixing seat 31 .

[0035] A gear ring 1 324 is coaxially fixedly connected to the lower side of the rotating ring 321 , and a gear ring 2 35 is rotatably mounted on the upper side of the fixing base 31 . The gear ring 2 35 is engaged with multiple gear rings 1 324 at the same time.

[0036] Specifically, during the rotation of the turntable 10, the centrifugal motion of the counterweight 33 overcomes the elastic tension of the tension spring 1 36, driving the turntable 32 to rotate about the swivel 321. Subsequently, the pull block 1 322 connected to one side of the swivel 321 pulls the wire core inside the brake wire 34, further pulling the pull ring 25 downward, thereby completing the pulling operation of the pull ring 25.

[0037] Because the gear rings 1 324 on the undersides of the multiple rotating rings 321 are restrained by the same gear ring 2 35, the multiple rotating frames 32 maintain a consistent angle of deployment when they rotate outward. Consequently, the multiple brake wires 34 exert a consistent pulling force on the corresponding connection points of the pull rings 25. Furthermore, by pulling the rubber membrane 24 through the pull ring 25, the negative pressure generated within the lifting cover 21 is evenly applied to the lower surface of the metal cover, further enhancing the stability of the metal cover's suction and fixation.

[0038] Combine Figure 3-Figure 6 The lifting cover 21 is fixedly connected to a support frame 26 through the outer surface. There are multiple support frames 26, and the multiple support frames 26 fix the lifting cover 21 above the rotating table 10.

[0039] An outer cover 11 is provided on the upper surface of the rotating table 10 to cover the lifting cover 21 inside. A support ring 12 is fixed on the upper edge of the outer cover 11. The support ring 12 fits closely with the outer edge of the metal cover in a preset state.

[0040] Specifically, by providing the outer cover 11 and support ring 12, and placing the metal cover inside, the suction cup assembly 20 and the pulling mechanism 30 are automatically shielded inside. As the turntable 10 rotates, the metal dust generated by polishing the inner surface of the metal cover is less likely to spread into the outer cover 11, effectively ensuring a clean working environment for the suction cup assembly 20 and the pulling mechanism 30, and reducing the possibility of malfunctions.

[0041] Combine Figure 4-Figure 6 、 Figure 10 A calibration component 40 for calibrating the metal cover is provided on the upper edge of the outer cover 11. There are at least three calibration components 40, which are distributed circumferentially.

[0042] The calibration assembly 40 comprises a sleeve 41 fixedly mounted on the upper edge of the outer cover 11. A pull rod 42 is movably mounted within the sleeve 41. A second tension spring 44 is fixedly mounted on the lower surface of the sleeve 41, which pulls the pull rod 42 upward. The second tension spring 44 is used to restore the pull rod 42 to its original position when the turntable 10 is stationary. A pressure block 43 is fixedly attached to the upper end of the pull rod 42. When the pull rod 42 moves downward, the pressure block 43 pushes downward on the upper edge of the metal cover. When at least three pressure blocks 43 simultaneously push downward on the upper edge of the metal cover, the tilted metal cover can be calibrated to a predetermined position.

[0043] A control assembly 50 is mounted on support frame 26. This assembly includes a crossbar 51, one end of which is connected to the lower end of pull rod 42 via pull cord 1 52. The other end of crossbar 51 is connected to the lower surface of pull ring 25 via pull cord 2 56. One end of the core of brake cable 34 is fixedly connected to the lower surface of crossbar 51, near pull cord 1 52. When brake cable 34 pulls crossbar 51, the end of crossbar 51 closest to pull cord 1 52 descends first.

[0044] A pivoting post 53 is also connected to the side surface of the crossbar 51 near the end of the pull cord 1 52. A limit plate 54 is fixedly connected to one side of the support frame 26. Limiting plate 54 has a limit slot 55 defined on its surface to guide the range of movement of the pivoting post 53. When the end of the crossbar 51 near the pull cord 1 52 descends first, the pivoting post 53 moves downward within the limit slot 55. When the pivoting post 53 reaches the bottom of the limit slot 55, as the brake line 34 continues to pull, the crossbar 51 pivots around the pivot 53, allowing the other end, connected to the end of the pull cord 2 56, to descend.

[0045] The plurality of brake wires 34 , the support frame 26 , the control assembly 50 and the plurality of calibration assemblies 40 correspond to each other one by one.

[0046] Specifically, because the pulling mechanism 30 controls the pulling displacements of the multiple brake wires 34 to be consistent when the turntable 10 is rotating, the multiple brake wires 34 maintain consistent motion when pulling their corresponding crossbars 51. Furthermore, when the lifting cover 21 is not generating negative pressure on the metal cover, the static friction between the metal cover and the lifting cover 21 is low, facilitating accurate positioning of the metal cover.

[0047] Furthermore, when the brake line 34 pulls the crossbar 51, one end of the brake line 34 preferentially pulls the pull rod 42 downward via the pull rope 52. At this point, only a weak negative pressure suction is generated inside the lifting cover 21. (Since the other end of the brake line 34 also descends a short distance in actual operation, this creates a weak negative pressure suction inside the lifting cover 21. However, this suction has little effect on the metal cover's fixation and has negligible effect on the pressure block 43's alignment of the metal cover.) As the rotating column 53 moves to the bottom of the retaining slot 55, the pressure block 43 at the upper end of the pull rod 42 also descends to a preset height. When at least three pressure blocks 43 have descended to the same height, the tilted metal cover can be automatically calibrated.

[0048] After the metal cover is automatically calibrated, it comes into effective contact with the second and third support rings 22 and 23 on the upper side of the lifting cover 21. Simultaneously, the brake line 34 continues to pull the crossbar 51, causing it to rotate about the rotating column 53. This, in turn, pulls the pull ring 25 downward via the second pull cord 56 (the second pull cord 56 is designed to accommodate the curved motion trajectory of one end of the crossbar 51). This causes the rubber membrane 24 to deform, further generating negative pressure inside the lifting cover 21, automatically adsorbing and securing the metal cover.

[0049] A polishing device includes a reversing mechanism 60 and a grinding mechanism 70; The reversing mechanism 60 includes a rotating base 61 rotatably mounted on the machine platform. A rotating arm 62 is fixedly provided on the rotating shaft surface of the rotating base 61. The outer end of the rotating arm 62 is connected to an electric cylinder 63 that drives the rotating arm 62 to rotate. Multiple grinding mechanisms 70 are provided and distributed around the rotating base 61. These grinding mechanisms 70 include a hinge frame 73. A rotating plate above the hinge frame 73 is fixedly mounted with a second motor 71. A fixed plate below the hinge frame 73 is fixed to the machine platform. A second electric cylinder 74 is mounted on one side of the fixed plate to propel the rotating plate. A grinding wheel 72 is connected to the output end of the second motor 71. The friction surface of the grinding wheel 72 is flexibly adapted to fit the inner surface of the metal cover at a predetermined position.

[0050] A rotating stage is mounted on the rotating base 61. Electric cylinder 1 63 pushes one end of the rotating arm 62, controlling the rotation of the rotating base 61. This in turn aligns the metal cover placed on the rotating stage with the corresponding grinding wheel 72. Subsequently, electric cylinder 2 74 pushes the movable plate of the hinge frame 73 at the corresponding grinding mechanism 70, causing the grinding wheel 72 mounted on the output end of motor 2 71 to rotate and fit against the corresponding inner wall of the metal cover, thereby performing polishing. As multiple grinding wheels 72 sequentially polish different parts of the metal cover's inner surface, the metal cover's inner surface is fully polished.

[0051] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A rotating stage, characterized in that: include: A rotating table (10), wherein a motor (13) for driving the rotating table (10) is provided on the lower side thereof; The suction cup assembly (20) is coaxially assembled on the upper side of the rotating table (10), and the suction cup assembly (20) includes a lifting cover (21) arranged in an annular shape, and the two upper edges of the upper side of the lifting cover (21) are respectively provided with a supporting ring 2 (22) and a supporting ring 3 (23), and the radius and position of the supporting ring 2 (22) and the supporting ring 3 (23) are adapted to seal and fit with the lower surface of the metal cover in a preset state, and the lower side of the lifting cover (21) is also sealed with a rubber membrane (24), and the lower side of the rubber membrane (24) is provided with a pull ring (25), and the pull ring (25) pulls the rubber membrane (24) to deform downward; The pulling mechanism (30) is coaxially assembled on the upper side of the rotating table (10). The pulling mechanism (30) includes a fixed seat (31). A rotating frame (32) is rotatably provided on the edge of the fixed seat (31). One end of the rotating frame (32) is connected to a counterweight (33). One side of the rotating frame (32) is provided with a tension spring (36) for pulling it to be retracted on the side of the fixed seat (31). The other end of the rotating frame (32) is provided with a pulling assembly for pulling down the pull ring (25). The pulling assembly is driven by the rotating frame (32) performing centrifugal swing when the rotating table (10) rotates. The second support ring (22) and the third support ring (23) support the metal cover in a stationary state with low friction. When the rotating table (10) rotates, the pulling mechanism (30) pulls the pull ring (25), forcing the lifting cover (21) to further fix the metal cover on the upper side of the lifting cover (21) through negative pressure.

2. The rotating stage according to claim 1, wherein: The rotating frame (32) is rotatably assembled on the fixed seat (31) through a rotating ring (321) fixedly connected at one end. The pulling assembly includes a brake line (34) arranged on one side of the rotating ring (321). A pull block (322) is fixedly arranged on the arc surface of the rotating ring (321). One end of the wire core of the brake line (34) is fixedly connected to the outer end of the pull block (322), and the other end is used to drive the pull ring (25) to move downward.

3. The rotating stage according to claim 2, wherein: The arc surface of the rotating ring (321) is also fixedly provided with a second pulling block (323), and one end of the first tension spring (36) is fixedly connected to the outer end of the second pulling block (323); A plurality of rotating racks (32) are provided and distributed circumferentially on the upper surface of the fixing seat (31).

4. The rotating stage according to claim 3, wherein: The lower side of the rotating ring (321) is coaxially fixedly connected to a gear ring 1 (324), and the upper side of the fixed seat (31) is rotatably equipped with a gear ring 2 (35), and the gear ring 2 (35) is engaged with multiple gear rings 1 (324) at the same time.

5. The rotating stage according to claim 4, characterized in that: The lifting cover (21) is fixedly connected to a support frame (26) via an outer surface, and a plurality of support frames (26) are provided. The plurality of support frames (26) fix the lifting cover (21) above the rotating table (10).

6. The rotating stage according to claim 5, characterized in that: The upper surface of the rotating table (10) is provided with an outer cover (11) covering the lifting cover (21) on the inner side, and the upper edge of the outer cover (11) is fixedly provided with a support ring (12), and the support ring (12) is adapted to fit the outer edge of the metal cover in a preset state.

7. The rotating stage according to claim 6, characterized in that: The upper edge of the outer cover (11) is provided with a calibration component (40) for calibrating the metal cover, and at least three calibration components (40) are provided and distributed in a circumferential direction; The support frame (26) is equipped with a control component (50), and the control component (50) is connected to one end of the brake line (34). When the brake line (34) pulls, the control component (50) first drives the calibration component (40) and then drives the pull ring (25); The plurality of brake lines (34), the support frame (26), the control assembly (50), and the plurality of calibration assemblies (40) correspond one to one.

8. The rotating stage according to claim 7, characterized in that: The calibration assembly (40) includes a sleeve (41) fixedly mounted on the upper edge of the outer cover (11), a pull rod (42) movably provided inside the sleeve (41), a tension spring (44) for pulling the pull rod (42) upwards fixedly provided on the lower surface of the sleeve (41), and a pressure block (43) fixedly connected to the upper end of the pull rod (42); Driven by the control assembly (50), the plurality of pull rods (42) move downward and push the upper edge of the metal cover through the pressing block (43).

9. The rotating stage according to claim 8, characterized in that: The control assembly (50) includes a cross bar (51), one end of the cross bar (51) is connected to the lower end of the pull rod (42) through a pull rope (52), and the other end of the cross bar (51) is connected to the lower surface of the pull ring (25) through a pull rope (56). One end of the core of the brake line (34) is connected to the lower surface of the cross bar (51), and its connection position is close to the pull rope (52). The side surface of the cross bar (51) close to the end of the pull rope (52) is also connected to a rotating column (53). One side of the support frame (26) is fixedly connected to a limiting plate (54), and a limiting groove (55) is provided on the surface of the limiting plate (54) for guiding the moving range of the rotating column (53).

10. A polishing device, characterized in that: It includes a reversing mechanism (60) and a grinding mechanism (70); The reversing mechanism (60) includes a rotating seat (61) rotatably assembled on the machine platform, a rotating arm (62) is fixedly provided on the rotating shaft surface of the rotating seat (61), and an electric cylinder (63) is connected to the outer end of the rotating arm (62) to drive the rotating arm (62) to rotate; The grinding mechanism (70) is provided in plurality and distributed around the rotating seat (61). The grinding mechanism (70) includes a hinge frame (73). A second motor (71) is fixedly mounted on the rotating plate on the upper side of the hinge frame (73). A fixed plate on the lower side of the hinge frame (73) is fixedly arranged on the machine platform. A second electric cylinder (74) for driving the rotating plate to rotate is provided on one side of the fixed plate. A grinding wheel (72) is connected to the output end of the second motor (71). The friction surface of the grinding wheel (72) is movably adapted to fit the preset position of the inner surface of the metal cover. The rotating seat (61) is equipped with a rotating stage according to any one of the above claims.

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