Double-face accurate grinding device for lens machining
By employing directional convection and filtration technology in a double-sided precision grinding device, combined with a soft tapping head and dispersant, the problem of uneven distribution of the grinding fluid was solved, achieving uniform grinding and defect reduction on the lens surface, and ensuring high-precision processing quality of the lens.
Patent Information
- Application Number
- CN202511827588.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-05
- Publication Date
- 2026-01-23
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In existing lens polishing equipment, the polishing fluid tends to form dead zones in the gaps between the polishing discs during polishing, resulting in uneven distribution of abrasive materials. This leads to the accumulation of abrasive debris in localized areas that cannot be discharged in time, causing defects such as scratches and pitting on the lens surface.
The device employs a double-sided precision grinding system. It forms directional convection through a circulating component and a filtration component. The grinding fluid is circulated and filtered using a liquid pump and a filter box. Combined with a soft tapping head, it promotes uniform distribution of abrasive particles. An anionic dispersant is added to break up agglomerates and ensure uniform abrasive particle size. The tapping component releases stress and removes abrasive debris.
This achieves consistent abrasive concentration across all areas of the lens surface, avoiding thickness and parallelism deviations, reducing the risk of surface defects such as microcracks and scratches, and ensuring the smoothness of the lens surface.
Smart Images
Figure CN121374352A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of lens fine grinding, in particular to a double-sided fine grinding device for lens processing. BACKGROUND
[0002] The lens fine grinding device is a core equipment in the field of optical manufacturing for high-precision surface processing of thin and brittle materials such as optical glass, sapphire, and semiconductor wafers. It removes the processing marks left over from the rough grinding stage of the material surface through the cooperative action of the grinding disc and the grinding liquid containing abrasive, corrects geometric shape deviations, and ultimately makes the lens meet the preset surface roughness, parallelism, and thickness tolerance standards, laying a key foundation for subsequent polishing processes, and is widely used in the production process of high-precision optical elements such as eyeglass lenses, camera optical lenses, and precision optical instrument lenses. When the existing lens fine grinding device grinds, the grinding liquid is prone to form flow dead angles in the gap between the grinding discs, resulting in uneven distribution of abrasive, and the local area cannot timely discharge due to abrasive accumulation, repeatedly extruding the lens surface and causing surface defects such as scratches and pits. SUMMARY
[0003] The purpose of the present application is to provide a double-sided fine grinding device for lens processing to solve the problem of uneven distribution of abrasive caused by flow dead angles in the gap between the grinding discs when the existing lens fine grinding device grinds, and the local area cannot timely discharge due to abrasive accumulation, repeatedly extruding the lens surface and causing surface defects such as scratches and pits.
[0004] To achieve the above purpose, the present application provides the following technical scheme: a double-sided fine grinding device for lens processing, comprising a lens double-sided grinding machine, a liquid tank, and a liquid pump, one side of the lens double-sided grinding machine is provided with a patrol assembly, one side of the lens double-sided grinding machine is provided with a filtering assembly, and one side of the lens double-sided grinding machine is provided with a knocking assembly. The patrol assembly comprises a liquid outlet pump, and the liquid outlet pump is connected to the lens double-sided grinding machine through a liquid inlet pipe, the inside of the lens double-sided grinding machine is provided with a liquid outlet pipe, the liquid pump is connected to the lens double-sided grinding machine through the liquid outlet pipe, the inside of the liquid pump is provided with a liquid delivery pipe, and one end of the liquid delivery pipe away from the liquid pump is provided with a filter tank; The filtering assembly comprises a rotating rod rotatably embedded in the inside of the liquid outlet pipe, one side of the outer surface of the rotating rod is fixedly connected with a first rotating plate, one side of the outer surface of the rotating rod is fixedly connected with a second rotating plate, and the second rotating plate is rotatably embedded in the inside of the filter tank; The knocking assembly comprises a fixed frame fixedly connected to one side of the outer surface of the lens double-sided grinding machine, a connecting rod rotatably sleeved on the outer surface of the fixed frame, a soft knocking head fixedly connected to one side of the outer surface of the connecting rod, and a transmission rod fixedly connected to one side of the outer surface of the connecting rod.
[0005] Preferably, one side of the outer surface of the liquid tank is fixedly connected with a liquid supplementing port, and the interior of the liquid outlet pump is communicated with the liquid tank.
[0006] Preferably, the interior of the filter tank is provided with a liquid return pipe, and one end of the liquid return pipe away from the filter tank is arranged in the interior of the liquid tank.
[0007] Preferably, one side of the inner wall of the filter tank is fixedly connected with a first filter plate, one side of the inner wall of the filter tank is fixedly connected with a second filter plate, and one side of the inner wall of the filter tank is fixedly connected with a third filter plate.
[0008] Preferably, one side of the outer surface of the fixing block is fixedly connected with a liquid cylinder, and the outer surface of the liquid cylinder is fixedly connected with a liquid supplementing port.
[0009] Preferably, the interior of the liquid cylinder is slidably embedded with a slide rod in a horizontal direction, one side of the outer surface of the slide rod is fixedly connected with a piston, and the piston is slidably embedded in the interior of the liquid cylinder in a horizontal direction.
[0010] Preferably, the outer surface of the slide rod is woundly sleeved with a return spring, the interior of the liquid cylinder is provided with a lead-in pipe, one end of the lead-in pipe away from the liquid cylinder is arranged in the interior of the liquid outlet pipe, the outer surface of the rotating rod is fixedly connected with a push block, and the interior of the lead-in pipe is provided with a one-way valve.
[0011] Preferably, the interior of the fixing frame is rotatably embedded with a power rod, and the outer surface of the power rod is fixedly connected with a protruding block.
[0012] Preferably, the outer surface of the power rod is fixedly connected with a first synchronous disc, one side of the outer surface of the rotating rod is fixedly connected with a second synchronous disc, the outer surface of the second synchronous disc is woundly sleeved with a synchronous belt, and one end of the synchronous belt away from the second synchronous disc is woundly sleeved on the outer surface of the first synchronous disc.
[0013] Compared with the prior art, the present application has the following beneficial effects: The present application utilizes bidirectional extraction of polishing liquid to form directional convection, so that the polishing liquid does not flow in the gap of the lens double-sided polishing machine, the contact concentration of abrasive and lens surface in each region is consistent, the thickness deviation and parallelism error caused by local grinding amount difference are avoided, the convection circulation can quickly extract the tiny polishing chips generated during fine grinding from the polishing area of the lens double-sided polishing machine, the polishing chips are prevented from repeatedly extruding between the lens and the polishing disc, and the risk of surface defects such as micro-cracks and scratches of thin and brittle lenses is reduced.
[0014] The present application filters the grinding liquid through the first filter plate, the second filter plate and the third filter plate, and respectively carries out primary filtration, ultrafiltration and nanofiltration, and a second rotating plate is arranged between the first filter plate and the second filter plate, the first rotating plate drives the second rotating plate to rotate between the first filter plate and the second filter plate through a rotating rod, the agglomerates in the grinding liquid are dispersed through the first rotating plate, the second rotating plate and the anionic dispersant, large particles are prevented from entering the grinding area to cause secondary scratches, the consistency of the abrasive particle size is maintained, the surface smoothness of the lens is ensured, the agglomerates are dispersed through shearing and cross-flow disturbance, and the anionic dispersant added weakens the inter-particle bonding force through electrostatic repulsion, so that more complete dispersion is realized, and uneven grinding caused by agglomerates is avoided.
[0015] The present application promotes uniform distribution of the grinding medium through the soft knocking head, the vibration can be transmitted to the grinding disc and the planetary gear system, the agglomeration state of the abrasive is broken, the grinding liquid is promoted to flow in the gap again, the abrasive uniformly covers the lens surface, the deviation of local ungrinding or excessive grinding is avoided, the accumulated stress of the grinding system and the correction of the slight deformation are released through knocking, the abrasive is discharged in time, the soft knocking head adjusts the frequency with the flow rate of the grinding liquid, the higher the flow rate, the more the abrasive is generated, the faster the stress is accumulated, and the higher the knocking frequency, so that the effectiveness of the soft knocking head is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the anatomical structure of the present application; Figure 3 It is a schematic diagram of part of the structure of the present application; Figure 4 It is a schematic diagram of part of the structure of the present application; Figure 5 It is a schematic diagram of part of the structure of the present application; Figure 6 It is a schematic diagram of the soft knocking head structure of the present application.
[0017] In the figure: 1, lens double-sided grinding machine; 2, liquid tank; 201, liquid supplement port; 202, liquid outlet pump; 203, liquid inlet pipe; 204, liquid outlet pipe; 205, liquid pump; 206, liquid delivery pipe; 207, liquid return pipe; 3, filter box; 301, first filter plate; 302, second filter plate; 303, third filter plate; 4, rotating rod; 401, first rotating plate; 402, second rotating plate; 403, push block; 5, liquid cylinder; 501, sliding rod; 502, piston; 503, supplement port; 504, inlet pipe; 505, return spring; 506, fixed block; 6, fixed frame; 7, soft knock head; 701, connecting rod; 702, transmission rod; 703, protrusion; 704, power rod; 8, synchronous belt; 801, first synchronous disc; 802, second synchronous disc. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.
[0019] Referring to Figures 1 to 6 As shown in the figure, the present application provides a double-sided fine grinding device for lens processing, which comprises a lens double-sided grinding machine 1, a liquid tank 2 and a liquid pump 205. The lens double-sided grinding machine 1 is provided with a circulating assembly on one side, a filtering assembly on one side and a knocking assembly on one side. The circulating assembly comprises a liquid outlet pump 202, and the liquid outlet pump 202 is connected to the lens double-sided grinding machine 1 through a liquid inlet pipe 203. The lens double-sided grinding machine 1 is provided with a liquid outlet pipe 204 inside. The liquid pump 205 is connected to the lens double-sided grinding machine 1 through the liquid outlet pipe 204. The liquid pump 205 is provided with a liquid delivery pipe 206 inside, and the liquid delivery pipe 206 is provided with a filter box 3 at the end away from the liquid pump 205. One side of the outer surface of the liquid tank 2 is fixedly connected with a liquid supplement port 201. The inside of the liquid outlet pump 202 is in communication with the liquid tank 2. The inside of the filter box 3 is provided with a liquid return pipe 207, and the end of the liquid return pipe 207 away from the filter box 3 is arranged in the inside of the liquid tank 2. Referring to Figures 1 to 4As shown, the worker adds the polishing liquid to the inside of the liquid tank 2 through the liquid supplement port 201, and then places the lens into the inside of the lens double-sided polishing machine 1 for polishing. During the polishing process, the polishing liquid in the inside of the liquid tank 2 is extracted by the liquid extraction pump 202, and is sent into the inside of the lens double-sided polishing machine 1 through the liquid inlet pipe 203. The polishing liquid in the inside of the lens double-sided polishing machine 1 is extracted from the inside of the lens double-sided polishing machine 1 again through the liquid extraction pump 205 and the liquid outlet pipe 204. Then, the polishing liquid is sent into the inside of the filter tank 3 through the liquid inlet pipe 206 by the liquid extraction pump 205. After the polishing liquid is filtered by the filter tank 3, the polishing liquid is returned to the inside of the liquid tank 2 again through the liquid return pipe 207, so as to form a circulating flow of the polishing liquid. Through the above technical solution, the polishing liquid is extracted in two directions to form a directional convection, so that the polishing liquid has no flow in the gap of the lens double-sided polishing machine 1, the contact concentration of the abrasive and the surface of the lens is kept consistent, the thickness deviation and parallelism out-of-tolerance caused by the local grinding amount difference are avoided, the tiny grinding dust generated by fine grinding is quickly extracted from the grinding area in the lens double-sided polishing machine 1 by the convection circulation, so as to avoid the repeated extrusion of the tiny grinding dust between the lens and the grinding disc, and reduce the risk of surface defects such as micro-cracks and scratches of the thin and brittle lens.
[0020] The filter assembly comprises a rotating rod 4 rotatably embedded in the liquid outlet pipe 204, and a first rotating plate 401 fixedly connected to one side of the outer surface of the rotating rod 4. A second rotating plate 402 is fixedly connected to one side of the outer surface of the rotating rod 4, and the second rotating plate 402 is rotatably embedded in the inside of the filter tank 3. One side of the inner wall of the filter tank 3 is fixedly connected with a first filter plate 301, one side of the inner wall of the filter tank 3 is fixedly connected with a second filter plate 302, and one side of the inner wall of the filter tank 3 is fixedly connected with a third filter plate 303. One side of the outer surface of the filter tank 3 is fixedly connected with a fixed block 506, and one side of the outer surface of the fixed block 506 is fixedly connected with a liquid cylinder 5. The outer surface of the liquid cylinder 5 is fixedly connected with a liquid supplement port 503. A sliding rod 501 is horizontally slidably embedded in the inside of the liquid cylinder 5, and one side of the outer surface of the sliding rod 501 is fixedly connected with a piston 502, which is horizontally slidably embedded in the inside of the liquid cylinder 5. A return spring 505 is wound around the outer surface of the sliding rod 501. A guide pipe 504 is arranged in the inside of the liquid cylinder 5, and one end of the guide pipe 504 away from the liquid cylinder 5 is arranged in the inside of the liquid outlet pipe 204. The outer surface of the rotating rod 4 is fixedly connected with a push block 403, and a one-way valve is arranged in the inside of the guide pipe 504. Referring to Figures 2 to 5As shown, the staff adds anionic dispersant into the liquid cylinder 5 through the supplement port 503. When the grinding liquid flows out through the liquid outlet pipe 204, the grinding liquid impacts the first rotating plate 401 to rotate. The first rotating plate 401 rotates to drive the rotating rod 4 to rotate. In the rotating process of the rotating rod 4, the push block 403 is driven to rotate. Through the push block 403, the sliding rod 501 and the piston 502 slide in the liquid cylinder 5. The piston 502 extrudes the anionic dispersant in the liquid cylinder 5, so as to transport the anionic dispersant to the inside of the liquid outlet pipe 204 through the inlet pipe 504. At the same time, when the grinding liquid is in the filter box 3, the grinding liquid is filtered by the first filter plate 301, the second filter plate 302 and the third filter plate 303, which are primary filtration, ultrafiltration and nanofiltration respectively. The second rotating plate 402 is arranged between the first filter plate 301 and the second filter plate 302. The first rotating plate 401 drives the second rotating plate 402 to rotate between the first filter plate 301 and the second filter plate 302 through the rotating rod 4. The agglomerates in the grinding liquid are dispersed by the first rotating plate 401, the second rotating plate 402 and the anionic dispersant, so as to avoid large particles from entering the grinding area to cause secondary scratches, maintain the consistency of abrasive particle size, protect the surface smoothness of the lens, and disperse the agglomerates through shearing, flow disturbance and the electrostatic repulsion of the added anionic dispersant. The combination of the two can achieve more complete dispersion and avoid uneven grinding caused by agglomerates.
[0021] The knocking assembly includes a fixed frame 6 fixedly connected to one side of the outer surface of the lens double-sided grinder 1. A connecting rod 701 is rotatably sleeved on the outer surface of the fixed frame 6. A soft knocking head 7 is fixedly connected to one side of the outer surface of the connecting rod 701. A transmission rod 702 is fixedly connected to one side of the outer surface of the connecting rod 701. A power rod 704 is rotatably embedded in the inside of the fixed frame 6. A protrusion 703 is fixedly connected to the outer surface of the power rod 704. A first synchronous disc 801 is fixedly connected to the outer surface of the power rod 704. A second synchronous disc 802 is fixedly connected to one side of the outer surface of the rotating rod 4. A synchronous belt 8 is sleeved on the outer surface of the second synchronous disc 802. Referring to Figures 2 to 6As shown, when the first rotating plate 401 drives the rotating rod 4 to rotate, the rotating rod 4 rotates through the second synchronous disc 802. The second synchronous disc 802 drives the first synchronous disc 801 to rotate through the synchronous belt 8. The rotation of the first synchronous disc 801 drives the power rod 704 to rotate. The rotation of the power rod 704 drives the protrusion 703 to rotate. The rotation of the protrusion 703 pushes the transmission rod 702. When the protruding position of the protrusion 703 contacts the transmission rod 702, it drives the connecting rod 701 to rotate at the connection between the fixed brackets 6. The connecting rod 701 is lifted by rotating around the connecting column of the fixed bracket 6, thereby lifting the soft striking head 7. When the protruding position of the protrusion 703 is no longer in contact with the transmission rod 702... When the transmission rod 702 contacts, the soft tapping head 7 resets and gently taps the upper grinding plate on top of the double-sided lens polishing machine 1. Through the above technical solution, the soft tapping head 7 promotes the uniform distribution of the polishing medium. The vibration can be transmitted to the polishing disc and planetary gear system, breaking the abrasive agglomeration and pushing the polishing fluid to flow again in the gap, so that the abrasive evenly covers the lens surface, avoiding deviations such as local unpolished or over-polished areas. At the same time, the tapping releases the accumulated stress of the polishing system and corrects minor deformations, while promoting the timely removal of polishing debris. Meanwhile, the frequency of the soft tapping head 7 is adjusted according to the flow rate of the polishing fluid. The higher the flow rate, the more polishing debris is generated and the faster the stress accumulates, the higher the tapping frequency, ensuring the effectiveness of the tapping release by the soft tapping head 7.
[0022] Working principle: The operator adds polishing fluid into the liquid tank 2 through the replenishment port 201, and then puts the lens into the lens double-sided polishing machine 1 for polishing. During the polishing process, the polishing fluid in the liquid tank 2 is drawn out by the outlet pump 202 and sent into the lens double-sided polishing machine 1 through the inlet pipe 203. The polishing fluid in the lens double-sided polishing machine 1 is then drawn out from the lens double-sided polishing machine 1 through the outlet pipe 204 by the suction pump 205. Then, the polishing fluid is sent into the filter box 3 through the delivery pipe 206 by the suction pump 205. After the polishing fluid is filtered by the filter box 3, it returns to the liquid tank 2 through the return pipe 207, thus forming a circulation of polishing fluid.
[0023] The worker adds the anionic dispersant into the liquid cylinder 5 through the replenishment port 503. As the grinding slurry flows out through the outlet pipe 204, it impacts the first rotating plate 401, causing it to rotate. The rotation of the first rotating plate 401 drives the rotating rod 4 to rotate, which in turn drives the push block 403 to rotate. The push block 403 then pushes the sliding rod 501 and piston 502 to slide inside the liquid cylinder 5. The piston 502 compresses the anionic dispersant inside the liquid cylinder 5, thus conveying the anionic dispersant through the inlet pipe 504 to the outlet pipe 204. Inside the 04 filter, while the grinding liquid is inside the filter box 3, it is filtered by the first filter plate 301, the second filter plate 302, and the third filter plate 303, which are respectively primary filtration, ultrafiltration, and nanofiltration. At the same time, a second rotating plate 402 is provided between the first filter plate 301 and the second filter plate 302. The first rotating plate 401 drives the second rotating plate 402 to rotate between the first filter plate 301 and the second filter plate 302 through the rotating rod 4. The agglomerates in the grinding liquid are dispersed by the first rotating plate 401, the second rotating plate 402, and the anionic dispersant.
[0024] When the first rotating plate 401 drives the rotating rod 4 to rotate, the rotating rod 4 rotates through the second synchronous disc 802. The second synchronous disc 802 drives the first synchronous disc 801 to rotate through the synchronous belt 8. The rotation of the first synchronous disc 801 drives the power rod 704 to rotate. The rotation of the power rod 704 drives the protrusion 703 to rotate. The rotation of the protrusion 703 pushes the transmission rod 702. When the protruding position of the protrusion 703 contacts the transmission rod 702, it drives the connecting rod 701 to rotate at the connection between the fixed frame 6. The connecting rod 701 is lifted by rotating around the connecting column of the fixed frame 6, thereby driving the soft tapping head 7 to lift. When the protruding position of the protrusion 703 is no longer in contact with the transmission rod 702, the soft tapping head 7 resets and lightly taps the upper grinding plate on the top of the double-sided lens grinding machine 1.
[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A double-sided fine grinding apparatus for lens processing, comprising a double-sided lens grinding machine (1), a liquid tank (2), and a liquid pump (205), characterized in that, A circulating component is provided on one side of the lens double-sided polishing machine (1), a filtering component is provided on one side of the lens double-sided polishing machine (1), and a striking component is provided on one side of the lens double-sided polishing machine (1). The circulating assembly includes a liquid outlet pump (202), which is connected to a lens double-sided polishing machine (1) via a liquid inlet pipe (203). The lens double-sided polishing machine (1) is equipped with a liquid outlet pipe (204). The liquid extraction pump (205) is connected to the lens double-sided polishing machine (1) via the liquid outlet pipe (204). The liquid extraction pump (205) is equipped with a liquid delivery pipe (206), and a filter box (3) is provided at the end of the liquid delivery pipe (206) away from the liquid extraction pump (205). The filter assembly includes a rotating rod (4) that is rotatably embedded inside the liquid outlet pipe (204), and a first rotating plate (401) is fixedly connected to one side of the outer surface of the rotating rod (4), and a second rotating plate (402) is fixedly connected to one side of the outer surface of the rotating rod (4), and the second rotating plate (402) is rotatably embedded inside the filter box (3). The striking assembly includes a fixed frame (6) fixedly connected to one side of the outer surface of the lens double-sided polishing machine (1), and a connecting rod (701) is rotatably sleeved on the outer surface of the fixed frame (6). A soft striking head (7) is fixedly connected to one side of the outer surface of the connecting rod (701), and a transmission rod (702) is fixedly connected to one side of the outer surface of the connecting rod (701).
2. The double-sided precision grinding apparatus for lens processing according to claim 1, characterized in that, A replenishment port (201) is fixedly connected to one side of the outer surface of the liquid tank (2), and the interior of the liquid pump (202) is connected to the liquid tank (2).
3. The double-sided precision grinding apparatus for lens processing according to claim 1, characterized in that, The filter box (3) is equipped with a return pipe (207), and the end of the return pipe (207) away from the filter box (3) is located inside the liquid tank (2).
4. The double-sided precision grinding apparatus for lens processing according to claim 1, characterized in that, A first filter plate (301) is fixedly connected to one side of the inner wall of the filter box (3), a second filter plate (302) is fixedly connected to one side of the inner wall of the filter box (3), and a third filter plate (303) is fixedly connected to one side of the inner wall of the filter box (3).
5. The double-sided precision grinding apparatus for lens processing according to claim 1, characterized in that, A fixing block (506) is fixedly connected to one side of the outer surface of the filter box (3), and a liquid cylinder (5) is fixedly connected to one side of the outer surface of the fixing block (506), and a replenishment port (503) is fixedly connected to the outer surface of the liquid cylinder (5).
6. The double-sided precision grinding apparatus for lens processing according to claim 5, characterized in that, The liquid cylinder (5) has a sliding rod (501) that is horizontally embedded inside, and a piston (502) is fixedly connected to one side of the outer surface of the sliding rod (501), and the piston (502) is horizontally embedded inside the liquid cylinder (5).
7. The double-sided precision grinding apparatus for lens processing according to claim 6, characterized in that, A return spring (505) is wound around the outer surface of the slide rod (501). An inlet pipe (504) is provided inside the liquid cylinder (5), and the end of the inlet pipe (504) away from the liquid cylinder (5) is provided inside the outlet pipe (204). A push block (403) is fixedly connected to the outer surface of the rotating rod (4). A one-way valve is provided inside the inlet pipe (504).
8. The double-sided precision grinding apparatus for lens processing according to claim 1, characterized in that, The fixed frame (6) is internally fitted with a power rod (704), and the outer surface of the power rod (704) is fixedly connected with a protrusion (703).
9. A double-sided precision grinding apparatus for lens processing according to claim 8, characterized in that, The outer surface of the power rod (704) is fixedly connected to a first synchronous disc (801), and one side of the outer surface of the rotating rod (4) is fixedly connected to a second synchronous disc (802). The outer surface of the second synchronous disc (802) is wrapped with a synchronous belt (8), and the end of the synchronous belt (8) away from the second synchronous disc (802) is wrapped with the outer surface of the first synchronous disc (801).