An automatic centering high-precision polishing device for optical lenses

Abstract

The application discloses an automatic centering optical lens high-precision polishing device, and relates to the technical field of optical lens polishing, which comprises a main machine and a polishing mechanism, the polishing mechanism is arranged on the inner side of the main machine, the polishing mechanism comprises a clamping arm, a sliding groove, a lens clamping ring, a convex ring and a transmission belt, the sliding groove is arranged on the inner side of the clamping arm, the lens clamping ring is arranged on the inner side of the clamping arm, the convex ring is arranged on the outer side of the lens clamping ring, the convex ring rotates on the inner side of the sliding groove, the transmission belt is sleeved on the outer side of the convex ring, the change of the non-spherical surface arc of the convex lens is adapted, the full-curved surface polishing is uniform and consistent, the service life of the driving component is prolonged, the sliding cylinder and the sliding ring sliding limiting structure realize stable motor operation axis, eliminate displacement deviation, improve the lens polishing forming precision, the overall automatic adaptability is strong, the polishing processing demand of different arc convex lenses is adapted, thus the double-sided polishing is improved, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of optical lens polishing technology, specifically to a high-precision polishing device for automatically centered optical lenses. Background Technology

[0002] Optical lenses consist of multiple sets of light-transmitting lenses, lens barrels, and positioning assembly components. They are formed through edge grinding, shaping, and high-precision double-sided polishing. The outer periphery of the lens is regular, vertical, and symmetrical. It achieves uniform rotation by relying on side friction transmission, which can accurately converge and refract light. It is widely used in cameras, surveillance, automotive, and various optical imaging equipment. Its polishing precision, concentricity, and surface flatness directly determine the image clarity and quality of use.

[0003] To achieve high-precision polishing of optical lenses in automated production, a high-precision polishing device with automatic centering is required. This device typically consists of a granite bed, a high-precision rotary table, an optical centering detection unit, a polishing actuator, and a CNC system. A photoelectric sensor detects the eccentricity between the lens optical axis and the spindle in real time, feeding back the information to a servo mechanism for automatic centering, achieving micron-level alignment between the optical axis and the rotation center. The polishing head achieves multi-axis linkage, adapting to both spherical and aspherical surfaces. Combined with online force control and displacement feedback, it completes deterministic ultra-precision polishing of the lens end face and outer diameter, balancing centering accuracy and surface quality.

[0004] However, the existing high-precision polishing device for automatically centering optical lenses has the following shortcomings: Currently available high-precision polishing devices for automatic centering optical lenses rely on optical imaging to detect lens eccentricity deviation, combined with a precision fine-tuning platform to correct the position in real time, and continuously calibrate coaxiality through electronic closed-loop feedback. They also use a mechanical clamping structure to complete coarse positioning, thus accurately completing the automatic centering of the lens. However, in actual use, they cannot polish both sides of the optical lens at the same time. After polishing one side, it needs to be manually disassembled and moved to the other side, requiring multiple calibrations, which results in low production efficiency.

[0005] Therefore, we propose an automatic centering high-precision polishing device for optical lenses to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a high-precision polishing device for automatically centering optical lenses. It achieves rapid clamping and fixing of optical lenses through a clamping structure, and simultaneously performs double-sided polishing using a dual-sided polishing mechanism to improve processing efficiency. A motor-driven system enables uniform adjustment of the lens angle, while a pressure sensor monitors the contact force in real time. A hydraulic mechanism automatically fine-tunes the polishing spacing to adapt to changes in the curved surface of convex lenses, ensuring uniform polishing throughout the lens. A protective structure isolates the lens from cooling liquid intrusion, and a sliding limit structure stabilizes the operating position of the polishing drive assembly, avoiding processing offset errors. This improves the polishing precision and finished product quality of the optical lenses, meeting the needs of mass production of precision polished lenses. Furthermore, this device utilizes a convex ring and a sliding groove for sliding limit coordination, relying on… The belt drive drives the lens clamping ring to rotate smoothly, achieving uniform rotation with the help of the lens's regular outer wall. This facilitates free angle adjustment and alignment of the polishing module, adapting to double-sided polishing of various convex lenses. The clamping module can be opened and closed to assemble and disassemble the workpiece, and bidirectional alignment completes automatic centering, effectively eliminating clamping eccentricity and reducing processing deviations. The device uses a built-in pressure sensor in conjunction with hydraulic components to form adaptive pressure regulation, preventing lens damage from pressure and ensuring balanced polishing force. The sliding cylinder and slip ring guide structure can stabilize the running trajectory of the polishing components, maintaining coaxial accuracy for long-term operation. At the same time, the belt groove limit prevents transmission deviation, and the dust cover and liquid baffle isolate dust and coolant from interference, protecting equipment components and preventing scratches on the lens, effectively improving polishing quality and batch processing consistency.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic centering high-precision polishing device for optical lenses, comprising a main unit and a polishing mechanism, wherein the polishing mechanism is disposed inside the main unit; The polishing mechanism includes a clamping arm, a sliding groove, a lens clamping ring, a convex ring, and a transmission belt. The sliding groove is formed on the inner side of the clamping arm, the lens clamping ring is disposed on the inner side of the clamping arm, the convex ring is disposed on the outer side of the lens clamping ring, the convex ring rotates on the inner side of the sliding groove, and the transmission belt is sleeved on the outer side of the convex ring.

[0008] Preferably, the polishing mechanism further includes a first motor module, which is installed on the inner wall of the host, and a rotating frame is installed at the output end of the first motor module. Two hydraulic devices are installed on the inner side of the rotating frame.

[0009] Preferably, a second motor module is installed at the output end of the hydraulic device, and a slide is installed on the outside of the second motor module.

[0010] Preferably, a slip ring is slidably connected to the outer side of the slide cylinder, and the other end of the slip ring is installed on the inner side of the rotating frame.

[0011] Preferably, a polishing module is installed at the output end of the second motor module, a pressure sensor is provided on the inner side of the polishing module, and a baffle is provided on the outer side of the polishing module.

[0012] Preferably, the other end of the baffle is installed on the inner side of the rotating frame, and a clamping module is installed on the inner side of the main unit.

[0013] Preferably, the clamping arm is installed on the inner output end of the clamping module, and a belt groove is provided on the inner side of the clamping arm, with the transmission belt located inside the belt groove.

[0014] Preferably, a reference lens is fitted inside the lens clamping ring, and a pulley is fitted inside the top of the transmission belt, with the pulley mounted outside the third motor module.

[0015] Preferably, a connecting frame is installed on the outer side of the third motor module, the connecting frame is installed on the inner side of the rotating frame, and the output end of the third motor module passes through the pulley and is rotatably connected to a rotating ring.

[0016] Preferably, the outer side of the rotating ring is fixedly connected to the connecting frame, and a dust cover is installed on the top of the main unit, with the dust cover located on top of the polishing mechanism.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This device relies on a clamping module in conjunction with a clamping arm and a lens clamping ring to quickly clamp and position optical lenses. The clamping operation is simple and quick, with strong positioning stability. It adopts a dual-sided polishing module synchronous operation mode, simultaneously grinding and polishing both sides of the lens, improving the overall polishing efficiency. The first motor module drives the lens side angle to adjust at a uniform speed, and a pressure sensor collects the contact pressure in real time. The hydraulic device automatically fine-tunes the polishing station spacing to adapt to the aspherical curvature changes of convex lenses, ensuring uniform and consistent polishing of the entire curved surface. An additional baffle provides waterproof protection and extends the service life of the drive components. The sliding cylinder and slip ring sliding limit structure stabilizes the motor running axis, eliminates displacement deviation, and improves the lens polishing and forming accuracy. The overall automation is highly adaptable, adapting to the polishing needs of convex lenses with different curvatures, thereby improving the ability to polish both sides simultaneously and increasing production efficiency.

[0018] 2. Simultaneously, this device uses a convex ring and a sliding groove for limiting movement, and in conjunction with a transmission belt and pulley, drives the lens clamping ring to rotate smoothly. The lens's uniform rotation is driven by the regular sidewalls on its outer side, eliminating interference from the transmission structure. This facilitates flexible angle adjustment and alignment of the polishing modules on both sides, adapting to double-sided polishing of convex lenses with different curvatures. The clamping module opens and closes to assemble and disassemble the workpiece, and automatically centers itself in both directions to prevent clamping eccentricity and reduce processing errors. The polishing module has a built-in pressure sensor, which, in conjunction with the hydraulic device, achieves adaptive pressure adjustment, protecting the lens from compression damage and ensuring uniform polishing force. The sliding cylinder and slip ring act as guides and limits, ensuring... The polishing components move along a regular trajectory, maintaining high-precision processing even after long-term use. The belt groove limits the transmission belt, preventing transmission failure and ensuring smooth lens rotation. The dust cover on top of the main unit, along with a baffle, blocks dust and coolant, protecting equipment components and preventing processing scratches on the lenses. This improves polishing quality and consistency in mass production. Furthermore, by polishing simultaneously on both sides, with both polishing components fixed to the same frame, the polishing components on both sides move and rotate synchronously during polishing, ensuring equal polishing angles and forces on both sides. This further enhances the symmetry of the polished surfaces on both sides, thereby improving the quality of the finished product. Attached Figure Description

[0019] Figure 1 This is a perspective view of the main structure of a high-precision polishing device for automatically centering optical lenses according to the present invention. Figure 2 This is a three-dimensional disassembled view of the structure in the high-precision polishing device for automatically centering optical lenses according to the present invention. Figure 3 This is a split perspective view of the polishing mechanism in a high-precision polishing device for automatically centering optical lenses according to the present invention. Figure 4 This is a three-dimensional exploded view of the polishing mechanism in a high-precision polishing device for automatically centering optical lenses according to the present invention. Figure 5 for Figure 4 Enlarged view of point A in the image; Figure 6 for Figure 4 Enlarged view of point B in the image; Figure 7 This is a partial anatomical view of the polishing mechanism in a high-precision polishing device for automatically centering optical lenses according to the present invention.

[0020] In the diagram: 1. Main unit; 2. Polishing mechanism; 201. First motor module; 202. Rotating frame; 203. Hydraulic device; 204. Second motor module; 205. Slide cylinder; 206. Slip ring; 207. Polishing module; 208. Pressure sensor; 209. Baffle; 210. Clamping module; 211. Clamping arm; 212. Belt groove; 213. Slide groove; 214. Lens clamping ring; 215. Convex ring; 216. Reference lens; 217. Transmission belt; 218. Connecting frame; 219. Third motor module; 220. Pulley; 221. Rotating ring; 3. Dust cover. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1, according to Figures 1-6 As shown, an automatic centering high-precision polishing device for optical lenses includes a main unit 1 and a polishing mechanism 2. The polishing mechanism 2 is located inside the main unit 1 and includes a clamping arm, a sliding groove 213, a lens clamping ring 214, a convex ring 215, and a transmission belt 217. The sliding groove 213 is located inside the clamping arm, the lens clamping ring 214 is located inside the clamping arm, and the convex ring 215 is located outside the lens clamping ring 214 and rotates inside the sliding groove 213. The transmission belt 217 is sleeved on the outside of the convex ring 215. The polishing mechanism 2 also includes a first motor module 201, which is installed on the inner wall of the main unit 1. The first motor module 201... A rotating frame 202 is installed at the output end. Two hydraulic devices 203 are installed inside the rotating frame 202. A second motor module 204 is installed at the output end of the hydraulic device 203. A slide cylinder 205 is installed outside the second motor module 204. A slip ring 206 is slidably connected to the outside of the slide cylinder 205. The other end of the slip ring 206 is installed inside the rotating frame 202. A polishing module 207 is installed at the output end of the second motor module 204. A pressure sensor 208 is installed inside the polishing module 207. A baffle 209 is installed outside the polishing module 207. The other end of the baffle 209 is installed inside the rotating frame 202. A clamping module 210 is installed inside the main unit 1.

[0023] The overall effect of Embodiment 1 is as follows: When polishing the optical lens begins, the clamping module 210 is first activated, driving the clamping walls 211 on both sides to open outwards, removing the lens clamping ring 214 from the clamping station. A worker then smoothly places the reference lens 216 inside the lens clamping ring 214. The lens clamping ring 214 containing the reference lens 216 is then placed back between the clamping walls 211, causing the outer protrusion 215 of the lens clamping ring 214 to engage with the corresponding groove 213 on the inner side of the clamping wall 211. Simultaneously, the transmission belt 217 is fitted onto the center of the outer side of the lens clamping ring 214. The clamping module 210 is then activated again, causing the output ends on both sides of the clamping module 210 to move the clamping walls 211 closer together. The lens clamping ring 214 is fixed in place, and then the hydraulic device 203 is activated. The hydraulic device 203 pushes the two second motor modules 204 on both sides to move towards the reference lens 216 in the middle position until the two polishing modules 207 on both sides are respectively attached to the left and right sides of the reference lens 216. The second motor module 204 is then activated, driving the polishing module 207 to rotate at high speed. The polishing module 207 in the rotating state simultaneously performs polishing and grinding operations on both sides of the reference lens 216. Since the optical lens to be processed is a convex lens structure with uneven distribution of the curvature of the lens surface, the first motor module 201 is activated during the polishing operation. The first motor module 201 is fixed according to the preset position. The rotating frame 202 rotates at a constant speed, and the rotating frame 202 synchronously drives all the supporting structures on the frame to complete the angular deflection. The convex lens has a different shape from a standard sphere. As the lens changes its relative angle with the structure, the contact distance between the lens and the polishing module 207 changes in real time. The reference lens 216 will exert a reverse pushing force on the polishing module 207. This force is collected in real time by the pressure sensor 208 and generates a corresponding pressure value. Based on the pressure data fed back by the pressure sensor 208, the equipment controls the hydraulic device 203 and the first motor module 201 to maintain synchronous and uniform operation. The hydraulic device 203 then drives the second motor modules 204 on both sides to move outward slightly, adjusting the real time between the polishing module 207 and the reference lens 216. The relative spacing between them ensures that the polishing module 207 remains within the appropriate polishing fit area, successfully completing the double-sided synchronous polishing operation of the optical lens. During the polishing process, the baffle 209 effectively prevents the cooling liquid from splashing outwards, avoiding corrosion and contamination of the second motor modules 204 and hydraulic device 203 on both sides, ensuring a clean operating environment for the power components. The slide cylinder 205 mounted on the outside of the second motor module 204 is slidably mounted on the inside of the slip ring 206. Throughout the entire process of the hydraulic device 203 driving the second motor module 204 to complete the position movement, the slide cylinder 205 and the slip ring 206 form a precise sliding limit cooperation, effectively ensuring the stability and alignment accuracy of the running axis of the second motor module 204, and preventing positional deviation during operation.Further improve the overall polishing precision of the optical lens.

[0024] Example 2, according to Figures 2-7 As shown, the clamping arm is installed on the inner output end of the clamping module 210. A belt groove 212 is provided on the inner side of the clamping arm. The transmission belt 217 is located on the inner side of the belt groove 212. A reference lens 216 is sleeved on the inner side of the lens clamping ring 214. A pulley 220 is sleeved on the inner top of the transmission belt 217. The pulley 220 is installed on the outer side of the third motor module 219. A connecting frame 218 is installed on the outer side of the third motor module 219. The connecting frame 218 is installed on the inner side of the rotating frame 202. The output end of the third motor module 219 passes through the pulley 220 and is rotatably connected to a rotating ring 221. The outer side of the rotating ring 221 is fixedly connected to the connecting frame 218. A dust cover 3 is installed on the top of the main unit 1. The dust cover 3 is located on the top of the polishing mechanism 2.

[0025] The overall effect of Embodiment 2 is as follows: This device uses a sliding limiting structure with a convex ring 215 and a sliding groove 213 to achieve smooth circumferential rotation of the lens clamping ring 214. Combined with the transmission belt 217 and pulley 220 to form a synchronous transmission structure, the lens can be driven to rotate at a uniform speed simply by relying on the regular outer circumference of the lens. This allows the polishing modules 207 on both sides to freely adjust their contact angle and working position, adapting to all-round double-sided polishing operations for convex lenses of different curvatures. The overall clamping structure allows for flexible opening and closing of the lens clamping ring 214, and lens... The loading and unloading clamping process is simple and quick. The clamping module 210 achieves bidirectional alignment and positioning, enabling automatic centering and positioning of the lens. This ensures precise automatic centering and avoids lens clamping misalignment from the outset, guaranteeing symmetrical and uniform polishing positions on both sides and reducing processing errors caused by eccentric polishing. The pressure sensor 208 is embedded in the polishing module 207, enabling real-time and accurate acquisition of polishing contact pressure. Combined with the hydraulic device 203's linkage adjustment structure, a closed-loop adaptive pressure adjustment system is formed. This system not only avoids hard extrusion damaging the optical lens surface and coating layer but also maintains standard... The polishing clamping force balances processing safety and polishing uniformity. The slide cylinder 205 and the slip ring 206 form a coaxial sliding guide structure. During the adjustment of the polishing module 207 driven by the hydraulic device 203, the running trajectory is constrained, preventing radial offset and axial misalignment of the polishing module 207. Even during long-term continuous operation, the coaxial precision of polishing can be maintained stably, improving the flatness of the finished lens surface. An integrated dust cover 3 is installed on the top of the main unit 1 to completely isolate external dust and grinding debris from entering the polishing operation area. At the same time, the baffle 209 isolates and cools the lubricating liquid, protecting the motor and hydraulic power components from liquid corrosion and damage, and reducing the adhesion of impurities to the lens surface, which can cause scratches and defects. This extends the service life of the equipment and further improves the smoothness of the mirror polishing. The belt groove 212 limits and stores the transmission belt 217, preventing the transmission belt 217 from running off-center, falling off, or slipping during operation. This ensures that the lens rotation speed is uniform and stable, and the lens rotation rhythm is precisely matched with the polishing operation rhythm, further improving the quality consistency of batch processed products.

[0026] The working principle of the entire device is as follows: When polishing the optical lens begins, the clamping module 210 is first activated, causing the clamping arms on both sides to unfold to the sides, thus removing the lens clamping ring 214. Then, the reference lens 216 is placed inside the lens clamping ring 214. The lens clamping ring 214, together with the reference lens 216, is then placed back inside the clamping arms, so that the convex ring 215 is located inside the slide groove 213. The drive belt 217 is sleeved on the outer middle position of the lens clamping ring 214. At this time, the clamping module 210 is activated again, causing the output ends on both sides of the clamping module 210 to... The moving clamping arm moves in the reverse direction, repositioning the lens clamping ring 214 within the clamping arm. At this time, the hydraulic device 203 activates, driving the two second motor modules 204 to move towards the central reference lens 216. This ensures that both polishing modules 207 are in contact with the sides of the reference lens 216. The second motor modules 204 then rotate, causing the polishing modules 207 to simultaneously polish both sides of the reference lens 216. Because the optical lens is a convex lens, during polishing on both sides, the first motor module 201 is positioned to... The rotating frame 202 rotates at a constant speed according to a fixed set time. The rotating frame 202 drives the various structures mounted on its inner side to rotate synchronously. Because the convex lens is not a sphere, the distance needs to be adjusted when it changes angle with the reference lens 216 during rotation. At this time, the reference lens 216, through its own reaction force on the polishing module 207, causes the pressure sensor 208 to generate a pressure value. Based on the pressure value provided by the pressure sensor 208, the hydraulic device 203, while rotating, opens synchronously and uniformly with the first motor module 201, driving... The second motor module 204 moves to both sides, thereby ensuring that the polishing module 207 remains within the normal polishing contact range with the reference lens 216, thus completing the simultaneous double-sided polishing of the optical lens. In the above, the baffle 209 prevents the cooling liquid from affecting the second motor modules 204 and the hydraulic device 203 on both sides. The slide cylinder 205 installed on the outside of the second motor module 204 slides inside the slip ring 206, which improves the axial stability and accuracy of the second motor module 204 when it is moved by the hydraulic device 203, thereby improving the polishing precision and preventing displacement.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-precision polishing device for automatically centering optical lenses, characterized in that: It includes a main unit (1) and a polishing mechanism (2), wherein the polishing mechanism (2) is disposed inside the main unit (1); The polishing mechanism (2) includes a clamping arm (211), a slide groove (213), a lens clamping ring (214), a convex ring (215), and a transmission belt (217). The slide groove (213) is opened on the inner side of the clamping arm (211), the lens clamping ring (214) is disposed on the inner side of the clamping arm (211), the convex ring (215) is disposed on the outer side of the lens clamping ring (214), the convex ring (215) rotates on the inner side of the slide groove (213), and the transmission belt (217) is sleeved on the outer side of the convex ring (215).

2. The high-precision polishing device for automatically centering optical lenses according to claim 1, characterized in that: The polishing mechanism (2) further includes a first motor module (201), which is installed on the inner wall of the host (1). A rotating frame (202) is installed at the output end of the first motor module (201), and two hydraulic devices (203) are installed on the inner side of the rotating frame (202).

3. The high-precision polishing device for automatically centering optical lenses according to claim 2, characterized in that: The output end of the hydraulic device (203) is equipped with a second motor module (204), and a slide cylinder (205) is installed on the outside of the second motor module (204).

4. The high-precision polishing device for automatically centering optical lenses according to claim 3, characterized in that: A slip ring (206) is slidably connected to the outer side of the slide cylinder (205), and the other end of the slip ring (206) is installed on the inner side of the rotating frame (202).

5. The high-precision polishing device for automatically centering optical lenses according to claim 4, characterized in that: The output end of the second motor module (204) is equipped with a polishing module (207), a pressure sensor (208) is provided on the inner side of the polishing module (207), and a baffle (209) is provided on the outer side of the polishing module (207).

6. The high-precision polishing device for automatically centering optical lenses according to claim 5, characterized in that: The other end of the baffle (209) is installed on the inner side of the rotating frame (202), and the clamping module (210) is installed on the inner side of the host (1).

7. The high-precision polishing device for automatically centering optical lenses according to claim 6, characterized in that: The clamping arm (211) is installed on the inner output end of the clamping module (210). A belt groove (212) is provided on the inner side of the clamping arm (211), and the transmission belt (217) is located on the inner side of the belt groove (212).

8. The high-precision polishing device for automatically centering optical lenses according to claim 7, characterized in that: A reference lens (216) is fitted inside the lens clamping ring (214), and a pulley (220) is fitted inside the top of the transmission belt (217). The pulley (220) is installed outside the third motor module (219).

9. The high-precision polishing device for automatically centering optical lenses according to claim 8, characterized in that: A connecting frame (218) is installed on the outside of the third motor module (219). The connecting frame (218) is installed on the inside of the rotating frame (202). The output end of the third motor module (219) passes through the pulley (220) and is rotatably connected to a rotating ring (221).

10. The high-precision polishing device for automatically centering optical lenses according to claim 9, characterized in that: The outer side of the rotating ring (221) is fixedly connected to the connecting frame (218), and a dust cover (3) is installed on the top of the host (1), and the dust cover (3) is located on the top of the polishing mechanism (2).

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