Step double-oxygen frame surface polishing device with positioning structure and polishing method

Abstract

The invention relates to the technical field of step double-oxygen frames, and discloses a step double-oxygen frame surface grinding device with a positioning structure, which comprises a bottom plate, a vertical rod and a vibration mechanism, the bottom of the bottom plate is fixedly connected with supporting legs, and the top of the bottom plate is provided with a grinding disc for placing grinding materials; a vibrating mechanism for driving the grinding disc to vibrate is arranged at the bottom of the grinding disc, the vertical rod is fixedly connected to the top of the bottom plate, a hinge seat is fixedly connected to the top of the vertical rod, a positioning frame is rotationally connected into the hinge seat, and a connecting rod is arranged in the positioning frame. The step double-oxygen frame can be prevented from falling off during polishing through positioning of the overturning plate, after polishing is completed, the positioning frame can be lifted to enable the step double-oxygen frame to be far away from the grinding disc, then the step double-oxygen frame can be directly pulled to extrude the overturning plate, and therefore the step double-oxygen frame is taken down from the surface of the connecting rod, positioning and dismounting of the step double-oxygen frame are quite rapid, a large amount of time is saved, and the polishing efficiency is improved. And the working efficiency can be effectively improved, and large-batch machining can be effectively achieved.

Description

Technical Field

[0001] The present invention relates to the field of stepped double-oxygen frames, and in particular to a surface grinding device and a grinding method for a stepped double-oxygen frame with a positioning structure. Background Art

[0002] The stepped double-oxygen frame is an important part of the protective cover of the rear camera of a mobile phone. During the production process of the stepped double-oxygen frame, in order to ensure the smoothness of the surface of the stepped double-oxygen frame and avoid burrs, a grinding device is used to fully grind the surface of the stepped double-oxygen frame to remove burrs and ensure product quality.

[0003] In the prior art, since the stepped double-oxygen frame is generally small in volume, a vibration grinding machine is usually used to perform grinding and polishing operations on the stepped double-oxygen frame. Generally, the stepped double-oxygen frame is directly dropped into the abrasive of the vibration grinding machine, and the abrasive is used to grind and polish the stepped double-oxygen frame through vibration. However, due to the small volume of the stepped double-oxygen frame, when it is directly dropped into the abrasive, it is impossible to position the stepped double-oxygen frame. Therefore, during the grinding process, the stepped double-oxygen frame will be submerged in the abrasive. Therefore, when the grinding is completed subsequently, it needs to be manually fished out. Since the stepped double-oxygen frame is small in volume, it is difficult to quickly take it out, seriously affecting work efficiency. Therefore, it is necessary to improve a surface grinding device and a grinding method for a stepped double-oxygen frame with a positioning structure to solve the above problems. Summary of the Invention

[0004] In order to overcome the problem that due to the small volume of the stepped double-oxygen frame, it is submerged in the abrasive during grinding and is difficult to quickly take out.

[0005] The technical solution of the present invention is: a surface grinding device for a stepped double-oxygen frame with a positioning structure, including a bottom plate, and further including a vertical rod and a vibration mechanism. Support legs are fixedly connected to the bottom of the bottom plate. A grinding disc for placing abrasive is arranged on the top of the bottom plate. A vibration mechanism for driving the grinding disc to vibrate is arranged at the bottom of the grinding disc. The vertical rod is fixedly connected to the top of the bottom plate. A hinge seat is fixedly connected to the top of the vertical rod. A positioning frame is rotatably connected inside the hinge seat. A connecting rod is arranged inside the positioning frame. A rotating shaft is rotatably connected inside the connecting rod. A turning plate is fixedly connected to the outside of the rotating shaft.

[0006] When using the surface grinding device and the grinding method for a stepped double-oxygen frame with a positioning structure of the present technical solution, the steps are as follows:

[0007] Step 1: Take out the connecting rod from the through hole of the positioning frame, then put the stepped hydrogen peroxide frame on the outside of the connecting rod. Multiple stepped hydrogen peroxide frames can be sleeved on the surface of one connecting rod. The stepped hydrogen peroxide frames sleeved on the surface of the connecting rod are limited by the turning plate and will not fall off. After the sleeving is completed, reinstall the connecting rod into the through hole of the positioning frame, then turn the positioning frame so that the connecting rod enters the inside of the grinding disc, and then add abrasive into the grinding disc. Make the grinding disc vibrate through the vibration mechanism, and cooperate with the internal abrasive to polish the stepped hydrogen peroxide frames positioned on the surface of the connecting rod.

[0008] Step 2: Clamp the connecting rod in the groove through the block, and the position of the connecting rod can be positioned through the groove. Pull the connecting rod directly. The connecting rod squeezes the block through the groove. The block compresses the first spring while sliding on the outside of the guide rod and the limit disc, which can make the block automatically reset. The torsion spring makes the turning plate in the unfolded state. After the stepped hydrogen peroxide frame is polished, lift the positioning frame and directly pull the stepped hydrogen peroxide frame to squeeze the turning plate. The turning plate is driven to rotate the rotating shaft under the extrusion, and at the same time drives the torsion spring to deform, so that the two turning plates can be brought together, and then the stepped hydrogen peroxide frame can be directly removed.

[0009] Step 3: When the connecting rod and the stepped hydrogen peroxide frame are inside the grinding disc, start the driving motor to drive the rotating ring. The rotating ring drives the mounting ring and the eccentric block to rotate at high speed through the bolt, so that the grinding disc vibrates in cooperation with the second spring. The vibration of the grinding disc polishes the stepped hydrogen peroxide frame through the internal abrasive. Unscrew the second nut and the first nut, and then the mounting ring can be removed, so as to replace the mounting ring and the eccentric block, and replace the eccentric block with a suitable size according to needs.

[0010] Preferably, the positioning frame is provided with a suitable through hole at the corresponding position of the connecting rod, and the connecting rod is arranged inside the suitable through hole. The hinge seat is provided with a limit groove at the corresponding position of the positioning frame, and the positioning frame can rotate within a range of 90 degrees through the limit groove.

[0011] Preferably, a torsion spring is fixedly connected between the turning plate and the connecting rod. A fixing plate is fixedly connected to the top of the positioning frame. One end of the fixing plate is fixedly connected to a guide rod. The end of the guide rod away from the fixing plate is fixedly connected to a limit disc. A block is slidably connected to the outside of the guide rod and the limit disc. A first spring for automatically resetting the block is fixedly connected between the block and the fixing plate, and the limit disc positions the block.

[0012] Preferably, the connecting rod is provided with a suitable groove at the corresponding position of the block, and the block is clamped in the groove.

[0013] Preferably, the vibration mechanism includes a connecting ring fixedly connected to the outside of the grinding disc. A second spring is fixedly connected between the connecting ring and the bottom plate. A motor bracket is fixedly connected to the bottom of the grinding disc. A driving motor is fixedly connected inside the motor bracket. The output end of the driving motor is fixedly connected to a rotating ring. The rotating ring is rotatably connected inside the motor bracket. A bolt is fixedly connected to the bottom of the rotating ring. A first nut is threadedly connected to the outside of the bolt. A second nut is threadedly connected to the outside of the bolt. An installation ring is arranged inside the bolt. An eccentric block is fixedly connected to the outside of the installation ring.

[0014] Preferably, the bolt is provided with a matching card slot at the corresponding position of the installation ring, and the installation ring is clamped inside the corresponding card slot.

[0015] Preferably, there are nine second springs, and the nine second springs are symmetrically arranged between the connecting ring and the bottom plate.

[0016] A surface grinding device and grinding method for a stepped double-oxygen frame with a positioning structure, characterized by including the above-mentioned surface grinding device for a stepped double-oxygen frame with a positioning structure, and the steps are as follows:

[0017] Step 1: Take out the connecting rod from the through hole of the positioning frame, and then put the stepped double-oxygen frame on the outside of the connecting rod. Multiple stepped double-oxygen frames can be sleeved on the surface of one connecting rod. The stepped double-oxygen frames sleeved on the surface of the connecting rod are limited by the turning plate and will not fall off. After the sleeving is completed, reinstall the connecting rod into the through hole of the positioning frame, and then turn over the positioning frame so that the connecting rod enters the inside of the grinding disc. Then add abrasives into the grinding disc, and make the grinding disc vibrate through the vibration mechanism, and cooperate with the internal abrasives to polish the stepped double-oxygen frames positioned on the surface of the connecting rod.

[0018] Step 2: Clamp the connecting rod by the block in the groove of the connecting rod, and then the position of the connecting rod can be positioned through the groove. Pull the connecting rod directly. The connecting rod squeezes the block through the groove. The block slides on the outside of the guide rod and the limit disc while compressing the first spring, and the block can be automatically reset. The torsion spring makes the turning plate in the unfolded state. After the stepped double-oxygen frame is polished, lift the positioning frame, and directly pull the stepped double-oxygen frame to squeeze the turning plate. The turning plate is driven to rotate the rotating shaft under the extrusion, and at the same time drives the torsion spring to deform, so that the two turning plates can be closed together, and then the stepped double-oxygen frame can be directly removed.

[0019] Step 3: When the connecting rod and the stepped double-oxygen frame are inside the grinding disc, start the driving motor to drive the rotating ring. The rotating ring drives the installation ring and the eccentric block to rotate at high speed through the bolt, so that the grinding disc vibrates in cooperation with the second spring. The vibration of the grinding disc polishes the stepped double-oxygen frame through the internal abrasives. Unscrew the second nut and the first nut, and then the installation ring can be removed, so as to replace the installation ring and the eccentric block, and replace the eccentric block with a suitable size according to needs.

[0020] Advantages of the present invention: Through the detachable connecting rod, the stepped double-oxygen frame can be quickly sleeved on the surface of the connecting rod. Through the positioning of the flipping plate, it can be avoided that the stepped double-oxygen frame falls off during grinding. After grinding is completed, the positioning frame can be lifted to make the stepped double-oxygen frame away from the grinding disc, and then the stepped double-oxygen frame can be directly pulled to squeeze the flipping plate, so as to remove the stepped double-oxygen frame from the surface of the connecting rod. The positioning and disassembly of the stepped double-oxygen frame are very fast, and there is no need to manually fish the stepped double-oxygen frame from the abrasive after grinding is completed, saving a lot of time, effectively improving work efficiency, and effectively coping with large-scale processing. Description of the Drawings

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the connecting rod of the present invention;

[0023] Figure 3 It is a sectional structural schematic diagram of the connecting rod of the present invention;

[0024] Figure 4 It is a sectional structural schematic diagram of the clamping block of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the vibration mechanism of the present invention;

[0026] Figure 6 It is a sectional structural schematic diagram of the vibration mechanism of the present invention;

[0027] Figure 7 It is an exploded structural schematic diagram of the vibration mechanism of the present invention.

[0028] Description of the reference numerals: 1, bottom plate; 21, vertical rod; 22, hinge seat; 23, positioning frame; 24, connecting rod; 25, rotating shaft; 26, flipping plate; 27, torsion spring; 28, fixing plate; 29, guide rod; 210, limiting disc; 211, clamping block; 212, first spring; 31, connecting ring; 32, second spring; 33, motor frame; 34, driving motor; 35, rotating ring; 36, bolt; 37, first nut; 38, second nut; 39, mounting ring; 310, eccentric block; 4, support leg; 5, grinding disc. Detailed Embodiments

[0029] The present invention will be further described below with reference to the drawings and embodiments.

[0030] Please refer to Figure 1 - Figure 7, the present invention provides an embodiment: a surface grinding device for a stepped double-oxygen frame with a positioning structure, including a bottom plate 1, and further including a vertical rod 21 and a vibration mechanism. Support legs 4 are fixedly connected to the bottom of the bottom plate 1. A grinding disc 5 for placing abrasive is arranged on the top of the bottom plate 1. A vibration mechanism for driving the grinding disc 5 to vibrate is arranged at the bottom of the grinding disc 5. The vertical rod 21 is fixedly connected to the top of the bottom plate 1. A hinge seat 22 is fixedly connected to the top of the vertical rod 21. A positioning frame 23 is rotatably connected inside the hinge seat 22. A connecting rod 24 is arranged inside the positioning frame 23. A rotating shaft 25 is rotatably connected inside the connecting rod 24. A turning plate 26 is fixedly connected to the outside of the rotating shaft 25. Add the abrasive into the inside of the grinding disc 5, and then position the stepped double-oxygen frame through the connecting rod 24 and the turning plate 26. And through the limit of the hinge seat 22, the positioning frame 23 can rotate within a range of ninety degrees, that is, the positioning frame 23 can be lifted, so as to facilitate the disassembly of the connecting rod 24. Through the positioning of the stepped double-oxygen frame by the connecting rod 24 and the turning plate 26, when the vibration mechanism is combined, the grinding disc 5 generates vibration, so as to polish the stepped double-oxygen frame through the abrasive. When the grinding is completed, the stepped double-oxygen frame can be directly pulled to squeeze the turning plate 26 to be removed. The positioning frame 23 is provided with a through hole adapted to the corresponding position of the connecting rod 24, and the connecting rod 24 is arranged inside the adapted through hole. The hinge seat 22 is provided with a limit groove at the corresponding position of the positioning frame 23. Through the limit groove, the positioning frame 23 can rotate within a range of ninety degrees. A specified number of connecting rods 24 can be positioned through a plurality of through holes. A plurality of connecting rods 24 can be selected according to needs. The connecting rods 24 can be evenly distributed through the distribution of the through holes. A torsion spring 27 is fixedly connected between the turning plate 26 and the connecting rod 24. A fixing plate 28 is fixedly connected to the top of the positioning frame 23. One end of the fixing plate 28 is fixedly connected with a guide rod 29. A limit disc 210 is fixedly connected to the end of the guide rod 29 away from the fixing plate 28. A clamping block 211 is slidably connected to the outside of the guide rod 29 and the limit disc 210. A first spring 212 for automatically resetting the clamping block 211 is fixedly connected between the clamping block 211 and the fixing plate 28. The limit disc 210 positions the position of the clamping block 211. The position of the connecting rod 24 can be positioned through the clamping block 211, realizing the rapid disassembly of the connecting rod 24. And the torsion spring 27 can make the turning plate 26 automatically reset, so as to automatically position the sleeved stepped double-oxygen frame, thus preventing the stepped double-oxygen frame from falling off during grinding. The connecting rod 24 is provided with an adapted groove at the corresponding position of the clamping block 211, and the clamping block 211 is clamped inside the groove. Through the groove, the height of the connecting rod 24 can be positioned by the clamping block 211, preventing the connecting rod 24 from sliding inside the through hole of the positioning frame 23 and stably positioning the position of the connecting rod 24.

[0031] Please refer to Figure 1 , Figure 5 - Figure 7, in this embodiment, the vibration mechanism includes a connecting ring 31. The connecting ring 31 is fixedly connected to the outside of the grinding disc 5. A second spring 32 is fixedly connected between the connecting ring 31 and the bottom plate 1. A motor bracket 33 is fixedly connected to the bottom of the grinding disc 5. A driving motor 34 is fixedly connected inside the motor bracket 33. The output end of the driving motor 34 is fixedly connected to a rotating ring 35. The rotating ring 35 is rotatably connected inside the motor bracket 33. A bolt 36 is fixedly connected to the bottom of the rotating ring 35. A first nut 37 is threadedly connected to the outside of the bolt 36. A second nut 38 is threadedly connected to the outside of the bolt 36. An installation ring 39 is arranged inside the bolt 36. An eccentric block 310 is fixedly connected to the outside of the installation ring 39. By driving the eccentric block 310 to rotate at a high speed by the driving motor 34, the grinding disc 5 generates vibration through centrifugal force, so as to cooperate with the abrasive to polish the stepped double-oxygen frame. The bolt 36 is provided with a matching card slot at the corresponding position of the installation ring 39, and the installation ring 39 is clamped inside the corresponding card slot. The installation ring 39 can be installed through the card slot, so that the installation ring 39 and the eccentric block 310 can be driven to rotate synchronously while the bolt 36 rotates. There are nine second springs 32, and the nine second springs 32 are symmetrically arranged between the connecting ring 31 and the bottom plate 1. The grinding disc 5 is symmetrically supported by the uniformly distributed second springs 32 to prevent the grinding disc 5 from tilting due to uneven force.

[0032] A surface grinding device and a grinding method for a stepped double-oxygen frame with a positioning structure, characterized by including the surface grinding device for a stepped double-oxygen frame with a positioning structure as described above, and the steps are as follows:

[0033] Step 1: Take out the connecting rod 24 from the through hole of the positioning frame 23, and then put the stepped double-oxygen frame on the outside of the connecting rod 24. Multiple stepped double-oxygen frames can be sleeved on the surface of one connecting rod 24. The stepped double-oxygen frame sleeved on the surface of the connecting rod 24 is limited by the flipping plate 26 and will not fall off. After the sleeving is completed, reinstall the connecting rod 24 into the through hole of the positioning frame 23, and then flip the positioning frame 23 so that the connecting rod 24 enters the inside of the grinding disc 5. Then add abrasive into the inside of the grinding disc 5, and make the grinding disc 5 vibrate through the vibration mechanism to polish the stepped double-oxygen frame positioned on the surface of the connecting rod 24 in cooperation with the abrasive inside.

[0034] Step 2: By clamping the clamping block 211 inside the groove of the connecting rod 24, the position of the connecting rod 24 can be located through the groove. When directly pulling the connecting rod 24, the connecting rod 24 squeezes the clamping block 211 through the groove. While the clamping block 211 slides outside the guide rod 29 and the limiting disc 210, the first spring 212 is compressed, enabling the clamping block 211 to automatically reset. The torsion spring 27 keeps the flipping plate 26 in the unfolded state. After the step double-oxygen frame is polished, lift the positioning frame 23, and directly pull the step double-oxygen frame to squeeze the flipping plate 26. The flipping plate 26 is driven by the extrusion to drive the rotating shaft 25 to rotate, and at the same time drive the torsion spring 27 to deform, so that the two flipping plates 26 can be brought together, and then the step double-oxygen frame can be directly removed.

[0035] Step 3: When the connecting rod 24 together with the step double-oxygen frame is inside the grinding disc 5, start the driving motor 34 to drive the rotating ring 35. The rotating ring 35 drives the mounting ring 39 and the eccentric block 310 to rotate at high speed through the bolt 36, so that the grinding disc 5 vibrates in cooperation with the second spring 32. The vibration of the grinding disc 5 uses the abrasive inside to polish the step double-oxygen frame. Unscrew the second nut 38 and the first nut 37, and then the mounting ring 39 can be removed, so as to replace the mounting ring 39 and the eccentric block 310, and replace the eccentric block 310 with a suitable size according to needs.

[0036] Example 1:

[0037] When using the surface grinding device and grinding method of the step double-oxygen frame with a positioning structure of this technical solution, the steps are as follows:

[0038] Step 1: Take out the connecting rod 24 from the through hole of the positioning frame 23, and then put the step double-oxygen frame on the outside of the connecting rod 24. Multiple step double-oxygen frames can be sleeved on the surface of one connecting rod 24. The step double-oxygen frames sleeved on the surface of the connecting rod 24 are limited by the flipping plate 26 and will not fall off. After the sleeving is completed, reinstall the connecting rod 24 into the through hole of the positioning frame 23, and then flip the positioning frame 23 so that the connecting rod 24 enters the grinding disc 5. Then add abrasive into the grinding disc 5, and make the grinding disc 5 vibrate through the vibration mechanism, and cooperate with the abrasive inside to polish the step double-oxygen frame positioned on the surface of the connecting rod 24.

[0039] Step 2: By clamping the clamping block 211 inside the groove of the connecting rod 24, the position of the connecting rod 24 can be located through the groove. When directly pulling the connecting rod 24, the connecting rod 24 squeezes the clamping block 211 through the groove. While the clamping block 211 slides on the outside of the guide rod 29 and the limiting disc 210, the first spring 212 is compressed, enabling the clamping block 211 to automatically reset. The torsion spring 27 keeps the turning plate 26 in the unfolded state. After the step double-oxygen frame is polished, lift the positioning frame 23 and directly pull the step double-oxygen frame to squeeze the turning plate 26. The turning plate 26 is driven to rotate the rotating shaft 25 when being squeezed, and at the same time drives the torsion spring 27 to deform, so that the two turning plates 26 can be closed together, and then the step double-oxygen frame can be directly removed.

[0040] Step 3: When the connecting rod 24 together with the step double-oxygen frame is inside the grinding disc 5, start the driving motor 34 to drive the rotating ring 35. The rotating ring 35 drives the mounting ring 39 and the eccentric block 310 to rotate at high speed through the bolt 36, so that the grinding disc 5 vibrates in cooperation with the second spring 32. The vibration of the grinding disc 5 polishes the step double-oxygen frame through the abrasives inside. Unscrew the second nut 38 and the first nut 37, and then the mounting ring 39 can be removed, so as to replace the mounting ring 39 and the eccentric block 310, and replace the eccentric block 310 with a suitable size according to needs.

Claims

1. A stepped double-oxygen frame surface grinding device with a positioning structure, comprising a bottom plate (1), characterized in that: It further includes a vertical rod (21) and a vibration mechanism. The bottom of the bottom plate (1) is fixedly connected with support legs (4). The top of the bottom plate (1) is provided with a grinding disc (5) for placing abrasive. The bottom of the grinding disc (5) is provided with a vibration mechanism for driving the grinding disc (5) to vibrate. The vertical rod (21) is fixedly connected to the top of the bottom plate (1). The top of the vertical rod (21) is fixedly connected with a hinge seat (22). The inside of the hinge seat (22) is rotatably connected with a positioning frame (23). The inside of the positioning frame (23) is provided with a connecting rod (24). The inside of the connecting rod (24) is rotatably connected with a rotating shaft (25). The outside of the rotating shaft (25) is fixedly connected with a turning plate (26).

2. The surface grinding device for the stepped double-oxygen frame with a positioning structure according to claim 1, characterized in that: The positioning frame (23) is provided with an adapted through hole at the corresponding position of the connecting rod (24), and the connecting rod (24) is arranged inside the adapted through hole. The hinge seat (22) is provided with a limiting groove at the corresponding position of the positioning frame (23), and the positioning frame (23) is rotated within a range of ninety degrees through the limiting groove.

3. The surface grinding device for the stepped double oxygen frame with a positioning structure according to claim 1, wherein: A torsion spring (27) is fixedly connected between the turning plate (26) and the connecting rod (24). The top of the positioning frame (23) is fixedly connected with a fixing plate (28). One end of the fixing plate (28) is fixedly connected with a guide rod (29). The end of the guide rod (29) far away from the fixing plate (28) is fixedly connected with a limiting disc (210). A clamping block (211) is slidably connected to the outside of the guide rod (29) and the limiting disc (210). A first spring (212) for automatically resetting the clamping block (211) is fixedly connected between the clamping block (211) and the fixing plate (28), and the limiting disc (210) positions the position of the clamping block (211).

4. The surface grinding device for the stepped double oxygen frame with a positioning structure according to claim 3, characterized in that: The connecting rod (24) is provided with an adapted groove at the corresponding position of the clamping block (211), and the clamping block (211) is clamped inside the groove.

5. The surface grinding device for the stepped double-oxygen frame with a positioning structure according to claim 1, characterized in that: The vibration mechanism includes a connecting ring (31). The connecting ring (31) is fixedly connected to the outside of the grinding disc (5). A second spring (32) is fixedly connected between the connecting ring (31) and the bottom plate (1). The bottom of the grinding disc (5) is fixedly connected with a motor frame (33). A driving motor (34) is fixedly connected inside the motor frame (33). The output end of the driving motor (34) is fixedly connected with a rotating ring (35). The rotating ring (35) is rotatably connected inside the motor frame (33). The bottom of the rotating ring (35) is fixedly connected with a bolt (36). A first nut (37) is threadedly connected to the outside of the bolt (36). A second nut (38) is threadedly connected to the outside of the bolt (36). An installation ring (39) is arranged inside the bolt (36). An eccentric block (310) is fixedly connected to the outside of the installation ring (39).

6. The surface grinding device for a stepped double oxygen frame with a positioning structure according to claim 5, characterized in that: The bolt (36) is provided with an adapted card slot at the corresponding position of the installation ring (39), and the installation ring (39) is clamped inside the corresponding card slot.

7. The surface grinding device for the stepped double-oxygen frame with a positioning structure according to claim 5, characterized in that: There are nine second springs (32), and the nine second springs (32) are symmetrically arranged between the connecting ring (31) and the bottom plate (1).

8. A step double-oxygen frame surface grinding device and a grinding method with a positioning structure, characterized in that It includes the step of the step double-oxygen frame surface grinding device with a positioning structure according to claims 1-7 as follows: Step 1: Take out the connecting rod (24) from the through hole of the positioning frame (23), and then put the stepped double-oxygen frame on the outside of the connecting rod (24). Multiple stepped double-oxygen frames can be sleeved on the surface of one connecting rod (24). The stepped double-oxygen frames sleeved on the surface of the connecting rod (24) are limited by the turning plate (26) and will not fall off. After the sleeving is completed, reinstall the connecting rod (24) into the through hole of the positioning frame (23), and then turn over the positioning frame (23) so that the connecting rod (24) enters the inside of the grinding disc (5). Then add abrasive into the grinding disc (5), and make the grinding disc (5) vibrate through the vibration mechanism, and cooperate with the abrasive inside to polish the stepped double-oxygen frames positioned on the surface of the connecting rod (24). Step 2: By clamping the block (211) into the groove of the connecting rod (24), the position of the connecting rod (24) can be positioned through the groove. Pull the connecting rod (24) directly. The connecting rod (24) squeezes the block (211) through the groove. The block (211) slides on the outside of the guide rod (29) and the limit disc (210) while compressing the first spring (212), which can make the block (211) automatically reset. The torsion spring (27) makes the turning plate (26) in the unfolded state. After the stepped double-oxygen frame is polished, lift the positioning frame (23), and directly pull the stepped double-oxygen frame to squeeze the turning plate (26). The turning plate (26) is driven to rotate the rotating shaft (25) under the extrusion, and at the same time drives the torsion spring (27) to deform, so that the two turning plates (26) can be closed together, and then the stepped double-oxygen frame can be directly removed. Step 3: When the connecting rod (24) and the stepped double-oxygen frame are inside the grinding disc (5), start the driving motor (34) to drive the rotating ring (35). The rotating ring (35) drives the mounting ring (39) and the eccentric block (310) to rotate at high speed through the bolt (36), so that the grinding disc (5) vibrates in cooperation with the second spring (32). The vibration of the grinding disc (5) polishes the stepped double-oxygen frame through the abrasive inside. Unscrew the second nut (38) and the first nut (37), and then the mounting ring (39) can be removed, so as to replace the mounting ring (39) and the eccentric block (310), and replace the eccentric block (310) with a suitable size according to needs.

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