An ultra-thin optical glass element polishing device

Abstract

The present application relates to the technical field of ultra-thin optical glass grinding, in particular to an ultra-thin optical glass element polishing device, which comprises a work platform, a grinding device and a receiving unit; a recess is vertically arranged on the upper part of the work platform; the receiving unit comprises a rotating frame, which is rotatably arranged in the recess; two vacuum chuck are arranged on the upper part and the lower part of the rotating frame respectively; a gas supply unit is arranged in the rotating frame, which comprises two gas channels, and the two gas channels are communicated with the two vacuum chucks respectively; when the rotating frame rotates, the vacuum chuck on the upper side is in a state of inhaling air, and the vacuum chuck on the lower side is in a state of pulse blowing; a first rotary driver is arranged on one side of the rotating frame, which is used to drive the rotating frame to rotate; two rotating joints are arranged between the two vacuum chucks and the gas supply unit respectively, and the two ends of the rotating joint are connected with the tail of the vacuum chuck and the end of the gas channel respectively. The present application improves the polishing quality and the polishing efficiency.

Description

Technical Field

[0001] This invention relates to the field of ultra-thin optical glass polishing technology, specifically to a polishing device for ultra-thin optical glass components. Background Technology

[0002] In the prior art, when polishing optical glass components, a special polishing device is usually required. Before polishing, the optical glass component to be polished needs to be placed on a limiting clamping device, and then the optical glass component is polished by a grinding device set above the vacuum suction cup.

[0003] For example, Chinese Patent Publication No. CN120244823B discloses a large-size optical glass flatness adaptive grinding device, including a material stage for carrying optical glass and a gantry frame spanning the material stage. A linear motion mechanism is rotatably mounted on the top of the gantry frame. The linear motion mechanism is driven to rotate by a first motor. The linear motion mechanism is connected to a lifting mechanism and is used to drive the lifting mechanism to move laterally. The lifting mechanism is connected to a grinding part and is used to drive the grinding part to move up and down. The linear motion mechanism is symmetrically connected to two clamping arms. The linear motion mechanism can drive the two clamping arms to open and close, so that the clamping arms abut against the edge of the optical glass and center it on the surface of the material stage. Side plates are symmetrically fixed on both sides of the lifting mechanism. Microswitches are installed on the surface of the side plates. The microswitches are connected to the linear motion mechanism through a controller. When the grinding part moves to the edge of the optical glass, the microswitches are touched by the clamping arms, causing the linear motion mechanism to push the grinding part to move in the opposite direction.

[0004] The above solution is similar in structure to existing optical glass grinding equipment. It uses clamping arms to hold the edges of optical glass elements to ensure their stability. However, it is not suitable for processing ultra-thin optical glass elements because ultra-thin optical glass elements are very thin and have low edge strength. Clamping the outer edge of ultra-thin optical glass elements can easily cause edge chipping.

[0005] Therefore, in the existing technology, when polishing ultrathin optical glass components, a vacuum suction cup is usually used to fix them. That is, before polishing, an adsorption pad is attached to the bottom of the ultrathin optical glass component to be polished. Then, the optical glass with the adsorption pad attached is placed horizontally on the vacuum suction cup (usually microporous ceramic type). After the vacuum suction cup adsorbs the adsorption pad set on the bottom of the optical glass component, the polishing device performs the polishing.

[0006] However, the aforementioned vacuum suction cup adsorption solution still has the following problems in practical use: A large amount of fine debris is generated during the grinding process, some of which is smaller than the pore size of the vacuum suction cup; simultaneously, because the upper surface of the vacuum suction cup is not perfectly flat under a microscopic scale, it is difficult to achieve a complete fit between the adsorption pad and the vacuum suction cup, leaving micro-gaps. Fine debris can enter the pores of the vacuum suction cup through these gaps, causing the upper part of the vacuum suction cup to be clogged with debris, resulting in uneven negative pressure distribution during subsequent use. Because ultra-thin optical glass elements are thin and have poor rigidity, they are more sensitive to uneven negative pressure distribution. Even slight pore clogging leading to uneven negative pressure distribution can easily cause the adsorbed ultra-thin optical glass elements to warp or shift during grinding, affecting the polishing quality.

[0007] Furthermore, to address the issue of debris clogging, a gas backflushing operation is typically performed on the vacuum suction cup after grinding to blow out any remaining debris from its pores. However, some of the blown-out debris falls back onto the vacuum suction cup under its own weight, making it difficult to completely remove even fine debris, even with auxiliary methods such as lateral airflow. The cleaning effect is also unsatisfactory. Moreover, during cleaning, the vacuum suction cup cannot perform its adsorption function, leaving the polishing device idle and resulting in low polishing efficiency. Summary of the Invention

[0008] To address the aforementioned issues, an ultra-thin optical glass element polishing device is provided. By setting two vacuum suction cups located at the top and bottom of the rotating frame respectively, and cooperating with two air channels and a rotating joint of the air supply unit, the device enables simultaneous operation of air suction from the upper vacuum suction cup and pulsed air blowing from the lower vacuum suction cup. Furthermore, the rotating frame will rotate once after each polishing, effectively solving the problems of existing vacuum suction cups being easily clogged by debris, having poor cleaning effect, and affecting polishing efficiency.

[0009] To address the problems of existing technologies, the present invention provides a polishing device for ultra-thin optical glass components, comprising a working platform, a polishing device, and a receiving unit; The upper part of the working platform has a vertical groove, and the receiving unit includes: A rotating frame is rotatably mounted in the groove. Two vacuum suction cups are provided, one on the upper part and one on the lower part of the rotating frame respectively; An air supply unit is installed in the rotating frame. The air supply unit includes two air channels, which are respectively connected to two vacuum suction cups. When the rotating frame rotates, the upper vacuum suction cup is in a suction state, and the lower vacuum suction cup is in a pulse blowing state. A first rotary actuator is disposed on one side of the rotating frame and is used to drive the rotating frame to rotate; Two rotary joints are provided and are respectively located between the two vacuum suction cups and the air supply unit. The two ends of the rotary joints are respectively connected to the tail of the vacuum suction cup and the end of the air passage.

[0010] Preferably, the air supply unit further includes a central turntable, which is disposed within the rotating frame and rotates synchronously with the rotating frame. The central turntable has a rotation axis when rotating with the rotating frame. Both air passages are disposed in the central turntable. The end of the air passage away from the corresponding rotating joint is called the external end. The extension direction of the external ends of the two air passages is parallel to the rotation axis, and the external ends of the two air passages are located on the side of the central turntable away from the first rotary driver.

[0011] Preferably, the rotating frame has a built-in electronic level.

[0012] Preferably, a limiting hole is horizontally formed on the side wall of the turntable, and a limiting unit is provided on one side of the rotating frame. The limiting unit includes: A limiting rod is movably disposed on one side of the turntable, parallel to the extending direction of the limiting hole, and the limiting rod can slide with the limiting hole; A sleeve is fitted onto the end of the limiting bar away from the central turntable. The sleeve contains hydraulic oil, and a hydraulic system is connected to the tail end of the sleeve.

[0013] Preferably, the limiting rod is provided with: A hydraulic groove is formed along the extension direction of the limiting bar at the end of the limiting bar located inside the sleeve; Multiple telescopic grooves are provided and evenly distributed around the axis of the limiting rod. The telescopic grooves are opened on the side wall of the limiting rod along the radial direction of the limiting rod. All the telescopic grooves are connected to the hydraulic groove. The diameter of the limiting rod is smaller than the diameter of the limiting hole. The telescopic block is slidably disposed in the telescopic groove along the extension direction of the telescopic groove. When the limiting rod is fully extended, the telescopic block is completely located in the limiting hole.

[0014] Preferably, the edges of the telescopic blocks extending from the telescopic groove are all chamfered.

[0015] Preferably, a driving unit is provided on one side of each of the two vacuum suction cups. The driving unit is used to drive the corresponding vacuum suction cup to rotate, and the two driving units are symmetrically distributed about the central turntable.

[0016] Preferably, a cover is provided on the outside of the drive unit, and a through hole is provided on the cover for the vacuum suction cup to pass through, the diameter of the through hole being equal to the diameter of the vacuum suction cup.

[0017] Preferably, the air passage consists of a vertical pipe and a horizontal pipe. A liquid storage tank is formed on the circumferential side wall of the horizontal pipe. The diameter of the liquid storage tank near the end of the vertical pipe is smaller than the diameter of the end of the liquid storage tank away from the vertical pipe. The transfer plate is also provided with a draining component for connecting the outside world with the liquid storage tank.

[0018] Preferably, the drainage assembly includes: Two drainage channels are provided, and the distribution direction of the two drainage channels is parallel to the distribution direction of the two vacuum suction cups. The drainage channels are inclinedly arranged on one side of the liquid storage tank, and the liquid storage tank is connected to the outside through the drainage channels. The valve body is located at the end of the drain channel away from the storage tank. The advantages of this invention compared to the prior art are: 1. This invention utilizes two vacuum suction cups located at the top and bottom of a rotating frame, respectively. Combined with two air channels in the air supply unit and a rotating connector, this allows for simultaneous operation of the upper vacuum suction cup drawing air and the lower vacuum suction cup pulse-blowing air. The rotating frame rotates once after each polishing cycle, effectively solving the problems of existing vacuum suction cups being easily clogged by debris, resulting in poor cleaning and reduced polishing efficiency. The pulse-blowing air from the lower vacuum suction cup blows out debris and prevents it from falling back, improving the cleaning effect. This ensures that the vacuum suction cup provides uniform negative pressure adsorption for ultra-thin optical glass components during use, preventing edge warping and displacement, and guaranteeing polishing quality. Simultaneously, the other vacuum suction cup is cleaned during polishing, eliminating idle time for cleaning the vacuum suction cups and improving cleaning efficiency.

[0019] 2. By incorporating an electronic level within the rotating frame, adding a central turntable to the air supply unit, and installing a limiting unit on one side of the rotating frame, the stability and accuracy of the device's operation are further improved. The electronic level monitors the tilt of the rotating frame in real time and determines the vertical position of the vacuum suction cup, preventing misalignment of the air supply; the central turntable integrates an optimized air duct layout, facilitating air path connection and maintenance; the limiting unit, through hydraulically driven limiting rods cooperating with telescopic blocks, achieves precise limiting of the central turntable, reducing wear on components, preventing the rotating frame from shaking, and ensuring polishing accuracy and device durability.

[0020] 3. By incorporating drive units, a housing, drainage edges, and raised rings, the polishing effect and device reliability are comprehensively improved. The symmetrical distribution of drive units ensures balanced force distribution on the rotating frame, thereby reducing the probability of vibration during polishing and improving the stability of the device. The housing, drainage edges, and raised rings together protect the drive unit, completely preventing polishing fluid and debris from entering the gaps, thus extending the service life of components, reducing malfunctions, and ensuring that the polishing precision meets usage requirements.

[0021] 4. By setting up a liquid storage tank and a drain assembly, blockages caused by scaling in the horizontal pipes of the air passage are avoided, ensuring smooth airflow and thus guaranteeing the stability of the vacuum suction cup when adsorbing ultra-thin optical glass components. At the same time, it reduces the workload of the vacuum filter and the steam-water separator, extends the maintenance cycle of the vacuum filter and the steam-water separator, and also reduces the amount of consumables used in the vacuum filter, thereby reducing the operating cost. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of a polishing device for ultra-thin optical glass elements according to the present invention.

[0023] Figure 2 This is a three-dimensional schematic diagram of the ultra-thin optical glass element polishing device of the present invention after the grinding device has been removed.

[0024] Figure 3 This is a partial cross-sectional three-dimensional schematic diagram of an ultra-thin optical glass element polishing device of the present invention after removing the working platform and grinding device. Figure 1 .

[0025] Figure 4 This invention relates to a polishing device for ultra-thin optical glass elements. Figure 3 A magnified view of a portion of point A in the middle.

[0026] Figure 5 This is a cross-sectional three-dimensional schematic diagram of the ultra-thin optical glass element polishing device of the present invention after removing the working platform and the polishing device.

[0027] Figure 6 This is a partial cross-sectional three-dimensional schematic diagram of an ultra-thin optical glass element polishing device of the present invention after removing the working platform and grinding device. Figure 2 .

[0028] Figure 7 This invention relates to a polishing device for ultra-thin optical glass elements. Figure 6 A magnified view of a portion of point B in the middle.

[0029] Figure 8 This invention relates to a polishing device for ultra-thin optical glass elements. Figure 6 A magnified view of a portion of point C.

[0030] Figure 9 This is a three-dimensional schematic diagram of the vacuum chuck and rotary joint separating in an ultra-thin optical glass element polishing device of the present invention.

[0031] Figure 10 This is a partially exploded cross-sectional three-dimensional schematic diagram of the limiting unit in the ultra-thin optical glass element polishing device of the present invention.

[0032] The diagram is labeled as follows: 1. Working platform; 11. Groove; 2. Grinding device; 3. Receiving unit; 31. Rotating frame; 311. Electronic level; 32. Vacuum suction cup; 321. Drainage edge; 33. Air supply unit; 331. Air passage; 3311. Liquid storage tank; 3312. Drainage channel; 3313. Valve body; 332. Central turntable; 3321. Limiting hole; 34. First rotary actuator; 35. Rotary joint; 36. Drive unit; 361. Second rotary actuator; 362. Synchronous ring; 363. Synchronous pulley; 364. Synchronous belt; 37. Cover; 371. Protruding ring; 4. Limiting unit; 41. Limiting rod; 411. Hydraulic groove; 412. Telescopic groove; 413. Telescopic block; 42. Sleeve. Detailed Implementation

[0033] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figures 1 to 3 , Figure 5 and Figure 6 A polishing device for ultra-thin optical glass components includes a working platform 1, a polishing device 2, and a receiving unit 3; The upper part of the working platform 1 is vertically provided with a groove 11, and the receiving unit 3 includes: The rotating frame 31 is rotatably disposed in the groove 11; Two vacuum suction cups 32 are provided and are respectively located on the upper and lower parts of the rotating frame 31; An air supply unit 33 is disposed in the rotating frame 31. The air supply unit 33 includes two air channels 331, which are respectively connected to two vacuum suction cups 32. When the rotating frame 31 rotates, the upper vacuum suction cup 32 is in a suction state, and the lower vacuum suction cup 32 is in a pulse blowing state. A first rotary driver 34 is disposed on one side of the rotating frame 31 and is used to drive the rotating frame 31 to rotate; Two rotary joints 35 are provided and are respectively located between the two vacuum suction cups 32 and the air supply unit 33. The two ends of the rotary joints 35 are respectively connected to the tail of the vacuum suction cup 32 and the end of the air passage 331.

[0035] The first rotary driver 34 is preferably a servo motor.

[0036] When the device is in operation, the first rotary driver 34 drives the rotating frame 31 to rotate in the groove 11 on the upper part of the working platform 1. The position of the rotating frame 31 is adjusted so that the two vacuum suction cups 32 are arranged vertically. After the rotating frame 31 is in position, the air supply unit 33 starts to work. The two air channels 331 in the air supply unit 33 are connected to the two vacuum suction cups 32 respectively, and the air channels 331 are stably connected to the tail of the vacuum suction cups 32 through the rotating joint 35. This ensures that the connection between the air channels 331 and the vacuum suction cups 32 is not affected during the rotation of the rotating frame 31. The vacuum suction cups 32 rotate and cooperate with the air supply unit 33 through the rotating joint 35. At this time, the vacuum suction cup 32 on the upper side is in a suction state under the action of the corresponding air channel 331, which can be used to adsorb the ultra-thin optical glass components to be polished, providing stable fixation for subsequent polishing operations; the vacuum suction cup 32 on the lower side is in a pulse blowing state under the action of the corresponding air channel 331, cleaning itself. Subsequently, the polishing device 2 polishes the ultra-thin optical glass element on the upper vacuum suction cup 32. During the polishing process, the air supply unit 33 works continuously, the upper vacuum suction cup 32 maintains the suction state to ensure the fixed stability of the ultra-thin optical glass element, and the lower vacuum suction cup 32 maintains the pulse blowing state for continuous cleaning. During polishing, the upper vacuum suction cup 32 is in a rotating state. After the ultra-thin optical glass element adsorbed by the vacuum suction cup 32 on this side is polished, the polished ultra-thin optical glass element is removed. Then, the first rotary driver 34 drives the rotating frame 31 to rotate, switching the upper and lower positions of the two vacuum suction cups 32, and continuing the polishing operation and vacuum suction cup 32 cleaning operation, repeating the cycle.

[0037] This device, by setting two vacuum suction cups 32 on the upper and lower parts of the rotating frame 31 respectively, and cooperating with the two air channels 331 of the air supply unit 33 and the rotating joint 35, realizes the simultaneous operation of the upper vacuum suction cup 32 suction and the lower vacuum suction cup 32 pulse blowing when the rotating frame 31 rotates. It effectively solves the problems of vacuum suction cup 32 being easily blocked by fine debris generated by grinding, resulting in poor cleaning effect and affecting polishing efficiency in the prior art. The pulse blowing of the lower vacuum suction cup 32 can blow out the debris in its own pores, and because it is located on the lower side, the blown debris will not fall back to its suction end face, improving the cleaning effect. At the same time, the other vacuum suction cup 32 can be cleaned during the grinding operation, avoiding the polishing device being idle and improving polishing efficiency. The setting of the rotating joint 35 ensures the stable connection between the air channel 331 and the vacuum suction cup 32 during the rotation of the rotating frame 31, ensuring the continuity and stability of suction and pulse blowing operations. In addition, the improved cleaning effect of the vacuum suction cup 32 allows for a more stable suction state when the vacuum suction cup 32 is on the upper side, providing uniform negative pressure adsorption for ultra-thin optical glass components. This avoids the problem of edge warping and displacement of ultra-thin optical glass components caused by uneven negative pressure distribution, thus ensuring polishing quality.

[0038] Reference Figure 3 and Figure 5 The air supply unit 33 further includes a central turntable 332, which is disposed inside the rotating frame 31 and rotates synchronously with the rotating frame 31. The central turntable 332 has a rotation axis when it rotates with the rotating frame 31. Both air passages 331 are disposed in the central turntable 332. The end of the air passage 331 away from the corresponding rotating joint 35 is called the external end. The extension direction of the external ends of the two air passages 331 is parallel to the rotation axis, and the external ends of the two air passages 331 are located on the side of the central turntable 332 away from the first rotary driver 34.

[0039] The central turntable 332 is housed within the rotating frame 31 and rotates synchronously with it. Both air passages 331 are integrated within the central turntable 332. The central turntable 332 has a rotation axis as it rotates with the rotating frame 31. The outer ends of both air passages 331 extend parallel to this rotation axis and are located on the side of the central turntable 332 furthest from the first rotary driver 34. This arrangement facilitates connection between the outer ends of the air passages 331 and an external air pump, preventing interference at the connection points due to the rotation of the rotating frame 31. It also ensures balanced force distribution on the two air passages 331, guaranteeing stable communication between the air passages 331, the rotating joint 35, and the vacuum suction cup 32. This, in turn, ensures the operational stability of the upper vacuum suction cup 32 for suction and the lower vacuum suction cup 32 for pulsed blowing.

[0040] It is worth noting that the first rotary actuator 34 drives the rotating frame 31 in a reciprocating manner, meaning the rotating frame 31 rotates by switching between 180 degrees forward and 180 degrees backward. Therefore, the connecting pipe between the external end of the air duct 331 and the air pump will not become severely entangled due to the rotation of the rotating frame 31. Simultaneously, standardizing the extension direction and external connection position of the air duct 331 facilitates external air path connections and overall equipment maintenance, further improving the reliability of the air supply unit 33 and indirectly ensuring the polishing quality of the ultra-thin optical glass components and the working efficiency of the device.

[0041] Reference Figure 4 The rotating frame 31 has an electronic level 311 built in.

[0042] The turntable 332 has a rotation axis when it rotates with the rotating frame 31. The electronic level 311 is positioned at a distance from the rotation axis. The greater the linear distance between the electronic level 311 and the rotation axis, the better the detection effect of the electronic level 311. Since the electronic level 311 can monitor the tilt angle of the rotating frame 31 in real time, it can not only detect the tilt state of the rotating frame 31, but also indirectly determine which vacuum suction cup 32 is on the upper side by the change in tilt. This ensures that the air supply unit 33 can accurately adsorb the vacuum suction cup 32 on the upper side and blow air on the vacuum suction cup 32 on the lower side. For example, when the rotation axis is parallel to the horizontal plane, the vacuum suction cups 32 are located on the left and right sides of the central turntable 332, respectively. When the rotating frame 31 drives the central turntable 332 to rotate, the bottom of the central turntable 332 will rotate to the left or to the right. The electronic level 311 can detect the change in the angle of the central turntable 332 and transmit the signal to the processor in real time. The processor can determine the distribution of the vertical position of the two vacuum suction cups 32 based on the trend of the angle change.

[0043] The electronic level 311 solves the problem that the rotating frame 31 cannot accurately determine the vertical position of the vacuum suction cup 32 after rotation, which can easily lead to misalignment of the air supply unit 33. At the same time, it can monitor the tilt state of the rotating frame 31 in real time, avoiding the vacuum suction cup 32 from being uneven due to the tilt of the rotating frame 31. This prevents the ultra-thin optical glass components being adsorbed from having an angle with the polishing device 2, further ensuring the adsorption stability and polishing quality. It also improves the automation level of the device, reduces manual intervention, and increases work efficiency.

[0044] Reference Figure 6 , Figure 7 and Figure 10 A limiting hole 3321 is horizontally formed on the side wall of the turntable 332, and a limiting unit 4 is provided on one side of the rotating frame 31. The limiting unit 4 includes: A limiting rod 41 is movably disposed on one side of the central turntable 332, parallel to the extending direction of the limiting hole 3321, and the limiting rod 41 can slide and engage with the limiting hole 3321. Sleeve 42 is sleeved on the end of the limiting bar 41 away from the central turntable 332. The sleeve 42 contains hydraulic oil and the tail of the sleeve 42 is connected to a hydraulic system.

[0045] When the rotating frame 31 drives the central turntable 332 to rotate to the preset position, and it is necessary to fix the positions of the rotating frame 31 and the central turntable 332 to ensure the stability of the polishing operation, the hydraulic system provides hydraulic pressure to the sleeve 42, pushing the limit bar 41 to move in a direction parallel to the limit hole 3321, so that the limit bar 41 slides into the limit hole 3321, thereby limiting and fixing the central turntable 332, and thus fixing the position of the rotating frame 31; when it is necessary to switch the up and down position of the vacuum suction cup 32, the hydraulic system depressurizes, and the limit bar 41 exits from the limit hole 3321 under the reverse force, releasing the limit, and the first rotary driver 34 can then drive the rotating frame 31 to rotate.

[0046] By cooperating with the limiting unit 4 and the limiting hole 3321 of the central turntable 332, the problem of easy displacement and shaking of the rotating frame 31 during the polishing operation is solved, ensuring that the rotating frame 31 and the central turntable 332 maintain a stable position, thereby ensuring the adsorption stability of the upper vacuum suction cup 32 and the polishing accuracy of the grinding device 2, and avoiding the displacement of the ultra-thin optical glass element and the appearance of polishing defects due to the shaking of the rotating frame 31; the hydraulic drive makes the extension and retraction of the limiting rod 41 smooth and controllable, with high reliability of the limiting fixation, and at the same time, the structure is simple and easy to work in coordination with the whole device, further improving the operational stability of the device.

[0047] Reference Figure 10 The limiting rod 41 is provided with: Hydraulic groove 411 is formed along the extending direction of the limiting rod 41 at the end of the limiting rod 41 located inside the sleeve 42; Multiple telescopic grooves 412 are provided and evenly distributed around the axis of the limiting rod 41. The telescopic grooves 412 are opened on the side wall of the limiting rod 41 along the radial direction of the limiting rod 41. All the telescopic grooves 412 are connected to the hydraulic groove 411. The diameter of the limiting rod 41 is smaller than the diameter of the limiting hole 3321. The telescopic block 413 is slidably disposed in the telescopic groove 412 along the extension direction of the telescopic groove 412. When the limiting rod 41 is fully extended, the telescopic block 413 is completely located in the limiting hole 3321.

[0048] When the hydraulic system supplies hydraulic pressure to the sleeve 42, hydraulic oil enters the hydraulic groove 411 and is transmitted to each telescopic groove 412 through the hydraulic groove 411, pushing the telescopic block 413 to extend outward along the radial direction of the telescopic groove 412. However, during the process of the limiting rod 41 sliding into the limiting hole 3321, since the limiting rod 41 can still slide, the telescopic block 413 can only slide with the limiting hole 3321. After the limiting rod 41 has completely slid into the limiting hole 3321, the telescopic block 413 extends completely under the action of hydraulic pressure and abuts against the inner wall of the limiting hole 3321. Multiple evenly distributed telescopic blocks 413 extend outward. The limiting rod 41 then comes into close contact with the inner wall of the limiting hole 3321, enabling the center positioning of the turntable 332 and ensuring the accuracy of the limiting position. At the same time, since the diameter of the limiting rod 41 is smaller than the diameter of the limiting hole 3321, the limiting rod 41 is prevented from directly contacting the limiting hole 3321 during grinding operations, reducing the wear of the limiting rod 41, extending its service life, and preventing the instability of the limiting position due to wear of the limiting rod 41. When it is necessary to release the limiting position, the hydraulic system is depressurized, and the telescopic block 413 retracts into the telescopic groove 412 under its own elasticity or reverse hydraulic action, so that the limiting rod 41 can smoothly exit from the limiting hole 3321.

[0049] Reference Figure 10 The edges of the telescopic block 413 extending from the telescopic groove 412 are all chamfered.

[0050] When the hydraulic system pushes the limiting rod 41 towards the limiting hole 3321, causing the limiting rod 41 to slide into the limiting hole 3321, the chamfer guides the telescopic block 413 to smoothly enter the limiting hole 3321 along with the limiting rod 41. This avoids a rigid impact between the end of the telescopic block 413 and the end of the limiting hole 3321, ensuring that the telescopic block 413 can smoothly abut against the inner wall of the limiting hole 3321. This reduces wear between the end of the telescopic block 413 extending from the telescopic groove 412 and the end of the limiting hole 3321 when the limiting rod 41 is inserted into the limiting hole 3321, improving the smoothness of insertion, avoiding damage to components caused by rigid impact, extending the service life of the telescopic block 413, and ensuring the stability of the limiting operation. This also prevents vibration caused by impact from affecting the positional stability of the rotating frame 31 and the central turntable 332, thereby ensuring the adsorption and fixing effect and polishing quality of the ultra-thin optical glass components, further improving the reliability and durability of the device.

[0051] Reference Figure 3 and Figure 4 Each of the two vacuum suction cups 32 is provided with a driving unit 36 ​​on one side. The driving unit 36 ​​is used to drive the corresponding vacuum suction cup 32 to rotate. The two driving units 36 are symmetrically distributed about the central turntable 332.

[0052] The drive unit 36 ​​includes a transmission assembly, which can be either gear-type or belt-type. To ensure smooth driving, a belt-type transmission assembly is used here. In this invention, the drive unit 36 ​​includes a second rotary driver 361, a synchronous ring 362, a synchronous pulley 363, and a synchronous belt 364. The second rotary driver 361 is vertically mounted on the rotating frame 31. The synchronous ring 362 is sleeved around the vacuum suction cup 32. The synchronous pulley 363 is fixedly mounted on the output end of the second rotary driver 361. The synchronous belt 364 is respectively sleeved on the synchronous ring 362 and the synchronous pulley 363. The synchronous ring 362 and the synchronous pulley 363 are driven by the synchronous belt 364. The second rotary driver 361 is preferably a servo motor.

[0053] Each of the two vacuum suction cups 32 has a drive unit 36 ​​on one side. The two drive units 36 are symmetrically distributed about the central turntable 332 to ensure balanced force on the entire device and prevent slight tilting of the rotating frame 31 due to uneven distribution of drive units 36. The second rotary driver 361 in the drive unit 36 ​​is vertically mounted on the rotating frame 31. The synchronization ring 362 is sleeved on the periphery of the vacuum suction cup 32, and the synchronization wheel 363 is fixed to the output end of the second rotary driver 361. The synchronization belt 364 is sleeved on the synchronization ring 362 and the synchronization wheel 363 respectively to realize the transmission cooperation between the synchronization ring 362 and the synchronization wheel 363. When the polishing operation is performed, the drive unit 36 ​​works, the second rotary driver 361 drives the synchronization wheel 363 to rotate, the synchronization wheel 363 drives the synchronization ring 362 to rotate through the synchronization belt 364, and the synchronization ring 362 in turn drives the corresponding vacuum suction cup 32 to rotate, so that the ultra-thin optical glass components adsorbed on the vacuum suction cup 32 rotate synchronously, and achieve all-round and uniform polishing in conjunction with the polishing device 2. The two drive units 36 are rotationally symmetrically distributed, which ensures the force balance of the rotating frame 31, reduces the probability of vibration of the rotating frame 31 during polishing, and further improves the applicability of the device and the polishing quality.

[0054] Reference Figure 3 , Figure 8 and Figure 9 A cover 37 is provided on the outside of the drive unit 36. The cover 37 has a through hole for the vacuum suction cup 32 to pass through. The diameter of the through hole is equal to the diameter of the vacuum suction cup 32.

[0055] A housing 37 covers the outside of the drive unit 36, providing protection. A through hole is provided on the housing 37 through which the vacuum suction cup 32 extends out of the housing 37. The diameter of the through hole is equal to the diameter of the vacuum suction cup 32, ensuring a tight fit between the vacuum suction cup 32 and the through hole without any noticeable gaps. When the device is working, the drive unit 36 ​​operates inside the housing 37, preventing debris and polishing fluid generated during the polishing process from entering the drive unit 36. Simultaneously, the vacuum suction cup 32 rotates normally through the through hole, achieving the adsorption and rotational polishing of the ultra-thin optical glass components. The housing 37 ensures the stable operation of the drive unit 36; the equal diameter of the through hole and the vacuum suction cup 32 provides guidance and limitation for the vacuum suction cup 32, reducing wobbling during rotation and ensuring its smooth rotation. This, in turn, ensures the polishing precision of the ultra-thin optical glass components, improving the reliability and durability of the device.

[0056] A drainage edge 321 is fixedly provided around the periphery of the vacuum suction cup 32, and the drainage edge 321 is located on the upper part of the cover 37.

[0057] The drainage edge 321 is fixedly arranged around the periphery of the vacuum suction cup 32 and located on the upper part of the cover 37. When the polishing device 2 polishes the ultra-thin optical glass element, polishing fluid and fine debris are generated. Some of the polishing fluid and debris will flow down the outer side wall of the vacuum suction cup 32 and fall onto the drainage edge 321. Since the upper part of the drainage edge 321 is inclined outward, the polishing fluid and debris falling onto the drainage edge 321 will slide down the inclined surface and will not accumulate at the drainage edge 321. At the same time, it can prevent the polishing fluid and debris from flowing into the gap between the vacuum suction cup 32 and the through hole, reducing the probability of polishing fluid and debris falling into the gap between the vacuum suction cup 32 and the through hole. In addition, the upper part of the drainage edge 321 is inclined outward, and the polishing fluid and debris will not accumulate at the drainage edge 321, further avoiding the problem of debris clogging the gap of the vacuum suction cup 32 and contaminating the drive unit 36, thus ensuring the normal operation of the drive unit 36.

[0058] A raised ring 371 is fixedly provided on the upper part of the cover 37. The inner ring of the raised ring 371 is coaxial with the through hole and has the same diameter. The outer periphery of the drainage edge 321 extends down to the outer periphery of the raised ring 371.

[0059] The raised ring 371 is fixedly installed on the upper part of the cover 37. The inner ring of the raised ring 371 is coaxial with the through hole and has the same diameter. The outer periphery of the drainage edge 321 extends downward to the outer periphery of the raised ring 371, forming a double protective structure. When the polishing fluid and debris generated during the polishing operation slide down along the drainage edge 321, the raised ring 371 can further prevent the polishing fluid and debris from flowing towards the through hole. The outer periphery of the drainage edge 321 extends downward to the outer periphery of the raised ring 371, so that the polishing fluid and debris can only slide down along the outer side of the drainage edge 321 and the raised ring 371, and cannot come into contact with the gap between the vacuum suction cup 32 and the through hole. This ensures that the polishing fluid and debris will not fall into the gap between the vacuum suction cup 32 and the through hole, further ensuring the stability of the drive unit 36, extending its service life, reducing the failure rate of the device, improving the overall reliability and polishing quality of the device, and ensuring that the polishing precision of the ultra-thin optical glass components meets the usage requirements.

[0060] As a supplement, during the adsorption process of the vacuum suction cup 32, grinding fluid is also drawn in. However, the grinding fluid does not remain in the vacuum suction cup 32 but enters the air pump through the pipeline connected to the vacuum suction cup 32. This can easily cause emulsification of the lubricating oil in the air pump. Additionally, the grinding fluid contains particulate matter such as fine powder, which can increase wear during air pump operation. To avoid these issues, existing technologies use a vacuum filter and a steam-water separator between the vacuum suction cup 32 and the air pump to intercept the grinding fluid entering the pipeline. However, due to the structure of this invention, the vacuum filter and steam-water separator need to be located near the air pump. Because of the limited internal structure of the rotating frame 31, the grinding fluid, after being drawn in by the vacuum suction cup 32, flows in a relatively long pipeline. Over time, this can easily lead to scaling and blockage in this long pipeline, which is difficult to clean and requires the removal of the central rotating plate 332 from the rotating frame 31. Therefore, to address these problems, this invention further designs the air passage 331: Reference Figure 5 The air passage 331 consists of a vertical pipe and a horizontal pipe. A liquid storage tank 3311 is formed on the circumferential side wall of the horizontal pipe. The diameter of the liquid storage tank 3311 near the end of the vertical pipe is smaller than the diameter of the end of the liquid storage tank 3311 away from the vertical pipe. The central turntable 332 is also provided with a draining component for connecting the outside world with the liquid storage tank 3311.

[0061] Since the air passage 331 consists of a vertical pipe and a horizontal pipe, and the rotary joint 35 is directly connected to the vertical pipe, when the air pump is running, the gas at the vacuum suction cup 32 first passes through the vertical pipe, then enters the horizontal pipe, and finally enters the air pump. The blockage caused by scaling mainly occurs in the horizontal pipe. Therefore, in order to avoid blockage of the horizontal pipe, a liquid storage tank 3311 is opened in the horizontal pipe. When the grinding fluid is sucked into the air passage 331 by the air pump, it first passes through the vertical pipe and then falls into the liquid storage tank 3311 when it enters the horizontal pipe. Since the liquid storage tank 3311 has a ring structure and is opened around the inner wall of the horizontal pipe, the grinding fluid is intercepted by the liquid storage tank 3311 and cannot continue to flow in the horizontal pipe, thus avoiding scaling in the latter part of the horizontal pipe and ensuring the unobstructed flow of the horizontal pipe.

[0062] In addition, the liquid storage tank 3311 is not a ring structure with equal diameters at both ends, but a rotating structure with a larger diameter at one end and a smaller diameter at the other end. The larger diameter end is further away from the vertical pipe, so that when the liquid storage tank 3311 is storing liquid, the grinding liquid will gather on the side of the liquid storage tank 3311 closer to the outside of the central turntable 332, which is convenient for the drainage component to discharge quickly. At the same time, since the liquid storage tank 3311 is a rotating structure, the grinding liquid temporarily stored in the liquid storage tank 3311 will always be at the bottom of the liquid storage tank 3311 when the rotating frame 31 drives the central turntable 332 to rotate, and will not overflow into the horizontal pipe due to the rotation of the central turntable 332.

[0063] Reference Figure 5 The drainage assembly includes: Two drainage channels 3312 are provided, and the distribution direction of the two drainage channels 3312 is parallel to the distribution direction of the two vacuum suction cups 32. The drainage channels 3312 are inclinedly arranged on one side of the liquid storage tank 3311, and the liquid storage tank 3311 is connected to the outside through the drainage channels 3312. The valve body 3313 is located at one end of the drain channel 3312 away from the liquid storage tank 3311.

[0064] The valve body 3313 in the drain assembly has a self-opening and self-closing function. The valve body 3313 is preferably a miniature solenoid valve. When the air pump draws in air, the drain assembly closes, and the storage tank 3311 cannot communicate with the outside world through the drain assembly. At this time, the storage tank 3311 cannot drain the stored grinding fluid. After grinding is completed, when the rotating frame 31 rotates 180 degrees, the storage tank 3311 without stored grinding fluid switches to the upper side, and the storage tank 3311 with stored grinding fluid switches to the lower side. The drain channel 3312, connected to the liquid storage tank 3311, is located below the liquid storage tank 3311 and is inclined downwards. The valve body 3313 is opened for a period of time, allowing the liquid storage tank 3311 to connect with the outside. Simultaneously, the air pump blows air in the opposite direction. During this blowing, due to the resistance of the vacuum suction cup 32, most of the airflow is discharged through the drain assembly, ensuring that the grinding fluid temporarily stored in the liquid storage tank 3311 can be discharged automatically under the guidance of the airflow and the drain channel 3312. When the valve body 3313 is open for a preset time, it will automatically close, ensuring that all subsequent air blown in by the air pump is discharged through the vacuum suction cup 32. Furthermore, the airflow also prevents the drain channel 3312 from becoming clogged after long-term use. By setting up a liquid storage tank 3311 and a drain assembly, the blockage of the horizontal pipeline in the air passage 331 due to scaling is avoided, ensuring smooth airflow. At the same time, the workload of the vacuum filter and the steam-water separator is reduced, the maintenance cycle of the vacuum filter and the steam-water separator is extended, and the amount of consumables used in the vacuum filter is also reduced, thereby reducing the operating cost.

[0065] Working principle: Before grinding, the electronic level 311 first checks the tilt of the rotating frame 31. If tilting is present, the first rotary driver 34 adjusts the angle of the rotating frame 31 to make it horizontal. Then, the limiting rod 41 in the limiting unit 4 extends out of the sleeve 42 under hydraulic pressure. Since the ends of the limiting rod 41 and the telescopic block 413 are chamfered, the limiting rod 41 will not collide with the end of the limiting groove when it drives the telescopic block 413 into the limiting groove. This reduces wear and ensures the smooth sliding of the limiting rod 41. After the limiting rod 41 is fully slid in, the pressure inside the sleeve 42 continues to rise. The extension blocks 413, which are slidably set in the extension groove 412, are pushed out. After all the extension blocks 413 set on the same limit bar 41 are pushed out, the center of the limit hole 3321 can be positioned. This ensures the stability of the limit unit 4 in limiting the turntable 332 and also ensures that the limit bar 41 will not directly contact the limit hole 3321 during grinding. This avoids the situation where the limit bar 41 is prone to wear due to vibration on one side of the rotating frame 31 during grinding. Compared with the limit bar 41 alone, the limit bar 41 with extension blocks 413 has a longer service life and better limiting stability and accuracy.

[0066] After the position of the rotating frame 31 is determined, the adsorption end face of the upper vacuum suction cup 32 faces vertically upward. The ultra-thin optical glass element with an adsorption pad attached is placed horizontally on the adsorption end face of the upper vacuum suction cup 32. Both air channels 331 are externally connected to air pumps. Subsequently, the air channels 331 connected to the vacuum suction cup 32 begin to pump air under the action of the corresponding air pumps, creating a negative pressure vacuum above the vacuum suction cup 32. During polishing, the air pumps continue to run. At this time, the adsorption end face of the lower vacuum suction cup 32 faces vertically downward. The air channels 331 connected to the vacuum suction cup 32 use pulsed air blowing under the action of the corresponding air pumps to blow out debris and dust clogging the vacuum suction cup 32. Because the adsorption end face of the vacuum suction cup 32 faces vertically downward, the blown-out debris and dust cannot re-contact the adsorption end face of the vacuum suction cup 32, improving the cleaning effect. Simultaneously, cleaning the other vacuum suction cup 32 during the polishing time also improves work efficiency.

[0067] After polishing, rotate the frame 31 180 degrees and repeat the above process.

[0068] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A polishing device for ultra-thin optical glass components, comprising a working platform (1), a polishing device (2), and a receiving unit (3). Its features are, The upper part of the working platform (1) is vertically provided with a groove (11), and the receiving unit (3) includes: The rotating frame (31) is rotatably disposed in the groove (11); Two vacuum suction cups (32) are provided and are respectively located on the upper and lower parts of the rotating frame (31); An air supply unit (33) is installed in the rotating frame (31). The air supply unit (33) includes two air channels (331). The two air channels (331) are respectively connected to two vacuum suction cups (32). When the rotating frame (31) rotates, the vacuum suction cup (32) on the upper side is in a suction state, and the vacuum suction cup (32) on the lower side is in a pulse blowing state. A first rotary driver (34) is disposed on one side of the rotating frame (31) for driving the rotating frame (31) to rotate; Rotary joints (35) are provided in two and are respectively located between the two vacuum suction cups (32) and the air supply unit (33). The two ends of the rotary joints (35) are respectively connected to the tail of the vacuum suction cup (32) and the end of the air passage (331).

2. The ultra-thin optical glass element polishing device according to claim 1, characterized in that, The air supply unit (33) also includes a central turntable (332), which is disposed in the rotating frame (31) and rotates synchronously with the rotating frame (31). The central turntable (332) has a rotation axis when it rotates with the rotating frame (31). Both air passages (331) are disposed in the central turntable (332). The end of the air passage (331) away from the corresponding rotating joint (35) is called the external end. The extension direction of the external ends of the two air passages (331) is parallel to the rotation axis, and the external ends of the two air passages (331) are located on the side of the central turntable (332) away from the first rotary driver (34).

3. The ultra-thin optical glass element polishing device according to claim 1, characterized in that, The rotating frame (31) has an electronic level (311) built in.

4. The ultra-thin optical glass element polishing device according to claim 2, characterized in that, A limiting hole (3321) is horizontally provided on the side wall of the turntable (332), and a limiting unit (4) is provided on one side of the rotating frame (31). The limiting unit (4) includes: A limiting rod (41) is movably disposed on one side of the turntable (332) parallel to the extending direction of the limiting hole (3321), and the limiting rod (41) can slide with the limiting hole (3321); A sleeve (42) is fitted onto the end of the limiting bar (41) away from the turntable (332). The sleeve (42) contains hydraulic oil, and a hydraulic system is connected to the tail of the sleeve (42).

5. The ultra-thin optical glass element polishing device according to claim 4, characterized in that, The limiting bar (41) is provided with: A hydraulic groove (411) is formed along the extension direction of the limiting rod (41) at the end of the limiting rod (41) located inside the sleeve (42); Multiple telescopic grooves (412) are provided and are evenly distributed around the axis of the limiting rod (41). The telescopic grooves (412) are opened on the side wall of the limiting rod (41) along the radial direction of the limiting rod (41). All the telescopic grooves (412) are connected to the hydraulic groove (411). The diameter of the limiting rod (41) is smaller than the diameter of the limiting hole (3321). The telescopic block (413) is slidably disposed in the telescopic groove (412) along the extension direction of the telescopic groove (412). When the limiting rod (41) is fully extended, the telescopic block (413) is completely located in the limiting hole (3321).

6. The ultra-thin optical glass element polishing device according to claim 5, characterized in that, The edges of the telescopic block (413) extending from the telescopic groove (412) are all chamfered.

7. A polishing apparatus for ultra-thin optical glass elements according to any one of claims 2 and 4 to 6, characterized in that, Each of the two vacuum suction cups (32) is provided with a drive unit (36) on one side. The drive unit (36) is used to drive the corresponding vacuum suction cup (32) to rotate. The two drive units (36) are symmetrically distributed about the central turntable (332).

8. The ultra-thin optical glass element polishing apparatus according to claim 7, characterized in that, A cover (37) is provided on the outside of the drive unit (36), and a through hole is provided on the cover (37) for the vacuum suction cup (32) to pass through. The diameter of the through hole is equal to the diameter of the vacuum suction cup (32).

9. The ultra-thin optical glass element polishing device according to claim 2, characterized in that, The air passage (331) consists of a vertical pipe and a horizontal pipe. A liquid storage tank (3311) is formed on the circumferential side wall of the horizontal pipe. The diameter of the liquid storage tank (3311) near the end of the vertical pipe is smaller than the diameter of the end of the liquid storage tank (3311) away from the vertical pipe. The central turntable (332) is also provided with a drain assembly for connecting the outside world with the liquid storage tank (3311).

10. The ultra-thin optical glass element polishing apparatus according to claim 9, characterized in that, The drainage assembly includes: There are two drainage channels (3312), and the distribution direction of the two drainage channels (3312) is parallel to the distribution direction of the two vacuum suction cups (32). The drainage channels (3312) are inclinedly arranged on one side of the liquid storage tank (3311), and the liquid storage tank (3311) is connected to the outside through the drainage channels (3312). The valve body (3313) is located at one end of the drain channel (3312) away from the storage tank (3311).

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