High-precision polishing device for optical lens machining

Abstract

The invention provides a high-precision polishing device for optical lens machining, and relates to the technical field of optical lens polishing, the high-precision polishing device comprises a polishing machine, a polishing cavity is formed in the polishing machine, a vacuum chuck seat is rotatably mounted in the polishing cavity, and a polishing head is further mounted in the polishing cavity; a plurality of C-shaped frames are installed on the top face of the vacuum suction cup base in a sliding mode, the C-shaped frames are arranged in an annular array mode, and the ends of the C-shaped frames are sleeved with abutting sleeves in a sliding mode. According to the high-precision polishing device for optical lens machining, through the arrangement of the polishing machine, the vacuum suction cup base, the polishing head, the C-shaped frame, the abutting sleeve, the locking mechanism and the buffer adsorption mechanism, the optical lens can be subjected to position adjusting treatment, and after the optical lens is fixed, the periphery of the optical lens is clamped and fixed with constant acting force; the stress uniformity of the optical lens is ensured, and the conditions of deformation, movement and the like caused by uneven stress in the polishing process are reduced, so that the polishing quality of the optical lens is ensured.

Description

Technical Field

[0001] This invention relates to the field of optical lens polishing technology, and in particular to a high-precision polishing apparatus for optical lens processing. Background Technology

[0002] As a core component in optoelectronic imaging, aerospace exploration, and precision instruments, the surface shape accuracy (PV≤λ / 10, λ=632.8nm), surface roughness (Ra≤0.001μm), and edge integrity of optical lenses directly determine the imaging quality and operational stability of terminal equipment. High-precision polishing is a key process in optical lens manufacturing. The core objective is to remove residual processing allowances and subsurface damage from previous polishing through the synergistic effect of abrasives and polishing pads, while ensuring that the lens is free from stress distortion and edge chipping / scratching.

[0003] Existing high-precision polishing devices for optical lenses mostly adopt a composite clamping scheme of "vacuum chuck pre-adsorption + three-jaw / four-jaw chuck centering", combined with an abrasive suspension spraying and cooling system, which can basically meet the conventional precision requirements. However, in actual industrial production, the reliability of lens edge protection is insufficient: optical lenses (especially hard and brittle materials such as quartz and sapphire, or ultra-thin lenses with a thickness of ≤1.5mm) have low critical breaking force at the edge. Existing devices only achieve contact buffering through a single buffer pad, which is difficult to offset the instantaneous impact force at the moment of centering and the dynamic force transmitted by equipment vibration during the polishing process. Summary of the Invention

[0004] Based on the technical problems existing in the background art, the present invention proposes a high-precision polishing device for optical lens processing.

[0005] The present invention proposes a high-precision polishing device for optical lens processing, including a polishing machine, a polishing chamber, a vacuum suction cup seat rotatably installed in the polishing chamber, and a polishing head also installed in the polishing chamber; Multiple C-shaped frames are slidably mounted on the top surface of the vacuum suction cup base. The multiple C-shaped frames are arranged in a circular array. A retaining sleeve is slidably fitted on the end of the C-shaped frame. A buffer pad is glued to the end of the retaining sleeve. A locking mechanism is also installed on the retaining sleeve. The locking mechanism is used to fix the position of the retaining sleeve on the C-shaped frame. The vacuum suction cup seat is equipped with a buffer adsorption mechanism. The clamping sleeve can be fixedly adsorbed on the buffer adsorption mechanism. The buffer adsorption mechanism can also open the locking mechanism. The buffer adsorption mechanism can also drive the clamping sleeve to abut against the outer periphery of the optical lens with a constant force.

[0006] Preferably, the locking mechanism includes a locking pin and a locking spring; one end of the abutment sleeve has a telescopic hole that slides with the end of the C-shaped frame, the inner wall of the telescopic hole has a movable hole that slides with the locking pin, the C-shaped frame has a positioning hole that matches the end of the locking pin, the locking spring is located in the movable hole, and both ends of the locking spring abut against the inner wall of the end of the movable hole and the end of the locking pin, respectively.

[0007] Preferably, the buffer adsorption mechanism includes a buffer adsorption slider and an electromagnet; the vacuum suction cup seat is provided with a buffer groove that slides in cooperation with the buffer adsorption slider, the electromagnet is fixedly installed in the buffer adsorption slider, and the electromagnet can magnetically attract and lock the pin.

[0008] Preferably, a vacuum suction cup is installed on the buffer adsorption slider, and the vacuum suction cup can hold the clamping sleeve.

[0009] Preferably, the buffer adsorption mechanism further includes a constant force spring; a rotating groove is provided in the vacuum suction cup seat, the inner ring end of the constant force spring is fixedly installed in the constant force spring, and the outer ring end of the constant force spring is fixedly connected to the buffer adsorption slider.

[0010] Preferably, the buffer adsorption mechanism further includes a buffer display component, which is used to display the displacement of the optical lens vibration.

[0011] Preferably, the buffer display assembly includes a strain gauge, a drive rack, a drive roller, and a transmission amplification component; a test chamber is formed inside the vacuum suction cup seat, one end of the strain gauge is fixedly installed inside the test chamber, a test groove is formed inside the vacuum suction cup seat that slides with the drive rack, a placement groove is formed at the end of the drive rack, the strain gauge is located in the placement groove, and there are two drive rollers, both of which are rotatably installed in the placement groove, and the two drive rollers are respectively located on both sides of the strain gauge; The transmission amplification component is used to amplify the sliding displacement of the buffer adsorption slider and convert it into the sliding displacement of the drive rack.

[0012] Preferably, the transmission amplification component includes a drive rack, a large gear, and a small gear; one end of the drive rack is fixedly connected to the buffer suction slider, the large gear is rotatably mounted in the vacuum suction cup seat, the large gear meshes with the drive rack, the small gear is rotatably mounted in the vacuum suction cup seat, the small gear meshes with the large gear, and the small gear also meshes with the drive rack.

[0013] Preferably, a threaded disc is rotatably mounted inside the vacuum suction cup seat, and the threaded disc engages with the bottom transverse section of the C-shaped frame.

[0014] Preferably, a transparent door panel is slidably installed on the polishing machine, and the transparent door panel can block the opening of the polishing chamber.

[0015] The high-precision polishing device for optical lens processing proposed in this invention has the following beneficial effects: by setting up a polishing machine, a vacuum suction cup seat, a polishing head, a C-shaped frame, a clamping sleeve, a locking mechanism, and a buffer adsorption mechanism, the optical lens can be adjusted. After the optical lens is fixed, it is clamped and fixed with a constant force around the optical lens to ensure the uniformity of the force on the optical lens and reduce deformation and movement caused by uneven force during the polishing process, thereby ensuring the polishing quality of the optical lens. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a high-precision polishing device for optical lens processing proposed in this invention. Figure 2 This is a partial cross-sectional view of a high-precision polishing apparatus for optical lens processing proposed in this invention; Figure 3 This is a cross-sectional view of the vacuum chuck seat in a high-precision polishing device for optical lens processing proposed in this invention. Figure 4 This is a top view of the vacuum chuck seat in a high-precision polishing device for optical lens processing proposed in this invention; Figure 5 This is a partial cross-sectional view of the vacuum chuck seat in a high-precision polishing device for optical lens processing proposed in this invention. Figure 6 This invention proposes a high-precision polishing device for optical lens processing. Figure 5 Enlarged view of point A in the middle; Figure 7 This is a schematic diagram of the locking pin structure in a high-precision polishing device for optical lens processing proposed in this invention; Figure 8 This is a schematic diagram of the drive rack and drive roller in a high-precision polishing device for optical lens processing proposed in this invention.

[0017] In the diagram: 1. Polishing machine; 2. Vacuum suction cup holder; 3. Polishing head; 4. C-shaped frame; 5. Clamping sleeve; 6. Locking pin; 7. Locking spring; 8. Buffer suction slider; 9. Electromagnet; 10. Constant force spring; 11. Strain gauge; 12. Drive rack; 13. Drive roller; 14. Drive rack; 15. Large gear; 16. Small gear; 17. End face threaded disc; 18. Transparent door panel. Detailed Implementation

[0018] Reference Figures 1-8This invention proposes a high-precision polishing device for optical lens processing, including a polishing machine 1. The polishing machine 1 has a polishing chamber, and a vacuum suction cup seat 2 is rotatably mounted inside the polishing chamber. An annular vacuum suction cup is mounted on the vacuum suction cup seat 2 for adsorbing and fixing optical lenses. The surface adsorption of the annular vacuum suction cup and the circumferential clamping of four C-shaped frames 4 form a double fixing structure, which enhances the stability of the optical lens during the polishing process, preventing movement and detachment. It also ensures uniform distribution of adsorption force through vacuum adsorption, avoiding lens deformation caused by excessive local pressure and guaranteeing the contour accuracy of the polished surface. A polishing head 3 is also installed inside the polishing chamber. The polishing head 3 oscillates within the polishing chamber to conform to the curved surface of the optical lens for polishing (this part is existing). (Technical details omitted). Four C-shaped brackets 4 are slidably mounted on the top surface of the vacuum suction cup base 2, arranged in a circular array. A retaining sleeve 5 is slidably fitted to the end of each C-shaped bracket 4. A buffer pad is adhered to the end of the retaining sleeve 5 (hereinafter, the retaining sleeve 5 rests against the outer periphery of the optical lens, and a buffer pad is placed between the optical lens and the retaining sleeve 5). The buffer pad makes flexible contact with the optical lens, preventing edge damage and chipping caused by hard compression, and reducing indentation residue at the contact point, ensuring the integrity of the lens's appearance. A locking mechanism is also installed on the retaining sleeve 5 to fix its position on the C-shaped bracket 4. The quick unlocking of the locking mechanism, combined with the constant force output of the buffer suction mechanism, ensures the lens remains centered. The initial fixation reliability is ensured, and the lens can respond in real time to minor offsets during polishing. Adaptive buffer adjustment counteracts the offset force, preventing the cumulative offset from causing a decrease in polishing surface accuracy. When polishing optical lenses, the lens position needs to be centered first. To eliminate eccentricity errors and ensure surface shape accuracy during curved surface polishing, four C-shaped supports 4 are simultaneously driven to move closer together, causing four clamping sleeves 5 to move synchronously and abut against the outer periphery of the optical lens, adjusting its position to center and thus clamping and fixing it. This avoids surface distortion caused by initial lens misalignment, significantly improving the consistency of surface shape accuracy and reducing subsequent correction processing costs. A buffer suction cup is installed on the vacuum chuck base 2. The attachment mechanism allows the clamping sleeve 5 to be fixedly adsorbed onto the buffer adsorption mechanism. This buffer adsorption mechanism can also open the locking mechanism and exert a constant force to drive the clamping sleeve 5 against the outer periphery of the optical lens. This constant clamping force provides precise matching to the polishing requirements of optical lenses of different specifications and materials, preventing lens elastic deformation due to excessive force or positioning failure due to insufficient force. This improves the device's adaptability to various lenses and expands its application range. In actual use, the optical lens is placed on the vacuum suction cup seat 2 (ensuring it is centered as much as possible), and then the four C-shaped brackets 4 and the clamping sleeve 5 are driven to move closer together. The four clamping sleeves 5 abut against the outer periphery of the optical lens, adjusting its position to be centered.The optical lens is clamped in place, and a ring-shaped vacuum chuck adheres the lens to the vacuum chuck seat 2. Simultaneously, a buffer suction mechanism holds the clamping sleeve 5 in place, and the locking mechanism is released. If the optical lens shifts during polishing, it pushes the clamping sleeve 5 and the buffer suction mechanism to move synchronously. The buffer suction mechanism then applies a constant force to the outer periphery of the optical lens, preventing excessive force between the optical lens and the buffer pad at the end of the clamping sleeve 5 during polishing, which could lead to edge chipping of the optical lens.

[0019] like Figure 5 and Figure 7 As shown, the locking mechanism includes a locking pin 6 and a locking spring 7; one end of the abutment sleeve 5 has a telescopic hole that slides with the end of the C-shaped frame 4, and the inner wall of the telescopic hole has a movable hole that slides with the locking pin 6. The C-shaped frame 4 has a positioning hole that matches the end of the locking pin 6. The locking spring 7 is located in the movable hole, and both ends of the locking spring 7 abut against the inner wall of the end of the movable hole and the end of the locking pin 6, respectively. In actual use, when adjusting the position of the optical lens, when the four C-shaped frames 4 move closer to each other synchronously, the rebound action of the locking spring 7 drives the locking pin 6 to insert into the positioning hole, thereby ensuring the fixed position between the C-shaped frame 4 and the abutment sleeve 5, so that the abutment sleeve 5 abuts against the outer periphery of the optical lens, and the four abutment sleeves 5 drive the optical lens to be centrally arranged on the vacuum suction cup seat 2.

[0020] like Figure 5 As shown, the buffer adsorption mechanism includes a buffer adsorption slider 8 and an electromagnet 9; the vacuum suction cup seat 2 has a buffer groove that slides with the buffer adsorption slider 8; the electromagnet 9 is fixedly installed inside the buffer adsorption slider 8; the electromagnet 9 can magnetically attract the locking pin 6; a vacuum suction cup is installed on the buffer adsorption slider 8 (the vacuum suction cup is not shown in the figure, as this is prior art and is not shown); the vacuum suction cup can hold the clamping sleeve 5; in actual operation, when adjusting the position and clamping the optical lens, the clamping sleeve 5 will slide on the buffer adsorption slider 8; after the clamping sleeve 5 clamps and fixes the optical lens, the electromagnet 9 will release the locking pin 6. Magnet 9 magnetically attracts locking pin 6, causing the end of locking pin 6 to disengage from the positioning hole. At this time, the clamping sleeve 5 can slide on the end of C-shaped frame 4. The vacuum suction cup adsorbs the clamping sleeve 5 onto the buffer adsorption slider 8, so that the clamping sleeve 5 and the buffer adsorption slider 8 are in a synchronized state. The buffer adsorption mechanism abuts against the outer periphery of the optical lens with a constant force, so that the stress around the optical lens is evenly distributed, reducing lens deformation. During the polishing process, because the force around the optical lens is evenly distributed, the slight movement caused by the difference in force between the components during the polishing process is reduced, ensuring the quality and precision of polishing.

[0021] like Figure 3 and Figure 5As shown, the buffer adsorption mechanism also includes a constant force spring 10; a rotating groove is provided in the vacuum suction cup seat 2, the inner ring end of the constant force spring 10 is fixedly installed in the constant force spring 10, and the outer ring end of the constant force spring 10 is fixedly connected to the buffer adsorption slider 8. In actual use, under the pulling action of the constant force spring 10, the buffer adsorption slider 8 and the clamping sleeve 5 are pressed against the outer periphery of the optical lens with a constant force. When the optical lens moves slightly during the polishing process, it is necessary to overcome the force of the constant force spring 10. When the force is greater than the force of the constant force spring 10, the clamping sleeve 5 and the buffer adsorption slider 8 can be pushed to slide, thereby reducing the excessive force that may cause the optical lens to chip. According to the characteristics of the constant force spring 10, it is ensured that the clamping force on the optical lens is always consistent, reducing the situation where uneven force makes it easier for the lens to move.

[0022] like Figure 5 and Figure 6 As shown, the buffer adsorption mechanism also includes a buffer display component, which is used to display the displacement of the optical lens vibration. In practice, in order to determine the movement of the optical lens during the polishing process, the buffer display component displays the displacement of the optical lens to determine the polishing status of the optical lens.

[0023] like Figure 5 , Figure 6 and Figure 8 As shown, the buffer display assembly includes a strain gauge 11, a drive rack 12, a drive roller 13, and a transmission amplification component. A test chamber is formed within the vacuum suction cup base 2. One end of the strain gauge 11 is fixedly installed within the test chamber. A test groove that slides within the vacuum suction cup base 2 is provided to engage with the drive rack 12. A placement groove is formed at the end of the drive rack 12, and the strain gauge 11 is located within the placement groove. Two drive rollers 13 are rotatably installed within the placement groove, and are located on opposite sides of the strain gauge 11. The transmission amplification component is used to move the buffer adsorption slider 8... The sliding displacement is amplified and converted into the sliding displacement of the drive rack 12. In actual operation, the optical lens drives the buffer adsorption slider 8 and the clamping sleeve 5 to move synchronously. The displacement of the buffer adsorption slider 8 is amplified by the transmission amplification component and converted into the movement of the drive rack 12. The drive rack 12 drives the two drive rollers 13 to move synchronously. The drive rollers 13 drive the strain gauge 11 to bend, thereby changing the resistance of the strain gauge 11. The displacement of the buffer adsorption slider 8 is then determined, thereby determining the displacement of the optical lens and the polishing quality of the optical lens.

[0024] like Figure 5 and Figure 6As shown, the transmission amplification component includes a drive rack 14, a large gear 15, and a small gear 16. One end of the drive rack 14 is fixedly connected to the buffer adsorption slider 8. The large gear 15 is rotatably mounted in the vacuum suction cup seat 2 and meshes with the drive rack 14. The small gear 16 is rotatably mounted in the vacuum suction cup seat 2 and meshes with the large gear 15. The small gear 16 also meshes with the drive rack 12. In actual use, the buffer adsorption slider 8 drives the large gear 15 to rotate during movement, which in turn drives the small gear 16 to rotate. The small gear 16 then drives the drive rack 12 to slide linearly, thereby causing the drive rack 12 to drive the drive roller 13 to pull the strain gauge 11, resulting in bending. Its structure is simple.

[0025] like Figure 2 As shown, a threaded disc 17 is rotatably installed inside the vacuum suction cup seat 2. The threaded disc 17 is threadedly engaged with the bottom transverse section of the C-shaped frame 4. The threaded disc 17 drives the four C-shaped frames 4 to move synchronously, either moving closer to each other or moving apart synchronously. The threaded disc 17 is driven to rotate by a motor and a bevel gear set.

[0026] like Figure 1 and Figure 2 As shown, a transparent door panel 18 is slidably installed on the polishing machine 1. The transparent door panel 18 can block the opening of the polishing chamber, thereby preventing the internal coolant from splashing out.

[0027] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-precision polishing device for optical lens processing, characterized by, Including the polishing machine (1), the polishing chamber is opened on the polishing machine (1), the vacuum chuck base (2) is rotatably installed in the polishing chamber, and the polishing head (3) is also installed in the polishing chamber. The top surface of the vacuum chuck base (2) is slidably installed with a plurality of C-shaped frames (4), the plurality of C-shaped frames (4) are arranged in a ring array, the end of the C-shaped frame (4) is slidably sleeved with a abutting sleeve (5), the end of the abutting sleeve (5) is bonded with a buffer pad, and the abutting sleeve (5) is also provided with a locking mechanism, and the locking mechanism is used to fix the position of the abutting sleeve (5) on the C-shaped frame (4). The vacuum chuck base (2) is provided with a buffer adsorption mechanism, the abutting sleeve (5) can be fixed and adsorbed on the buffer adsorption mechanism, the buffer adsorption mechanism can also open the locking mechanism, and the buffer adsorption mechanism can also drive the abutting sleeve (5) to abut against the outer periphery of the optical lens with constant force.

2. The high-precision polishing device for optical lens processing according to claim 1, characterized in that, The locking mechanism comprises a locking pin (6) and a locking spring (7); one end of the abutting sleeve (5) is provided with an expansion hole which is slidably matched with the end of the C-shaped frame (4), the inner wall of the expansion hole is provided with a movable hole which is slidably matched with the locking pin (6), the C-shaped frame (4) is provided with a positioning hole which is matched with the end of the locking pin (6), the locking spring (7) is located in the movable hole, and the two ends of the locking spring (7) are respectively abutted with the end inner wall of the movable hole and the end of the locking pin (6).

3. The high-precision polishing device for optical lens processing according to claim 2, characterized in that, The buffer adsorption mechanism comprises a buffer adsorption sliding block (8) and an electromagnet (9); the vacuum chuck base (2) is provided with a buffer sliding groove which is slidably matched with the buffer adsorption sliding block (8), and the electromagnet (9) is fixedly installed in the buffer adsorption sliding block (8); the electromagnet (9) can magnetically attract the locking pin (6).

4. The high-precision polishing device for optical lens processing according to claim 3, characterized in that, The buffer adsorption sliding block (8) is provided with a vacuum chuck, and the vacuum chuck can suck the abutting sleeve (5).

5. The high-precision polishing device for optical lens processing according to claim 3, characterized in that, The buffer adsorption mechanism further comprises a constant force clockwork spring (10); the vacuum chuck base (2) is provided with a rotating groove, the inner ring end of the constant force clockwork spring (10) is fixedly installed in the constant force clockwork spring (10), and the outer ring end of the constant force clockwork spring (10) is fixedly connected with the buffer adsorption sliding block (8).

6. The high-precision polishing device for optical lens processing according to claim 5, characterized in that, The buffer adsorption mechanism further comprises a buffer display assembly, and the buffer display assembly is used to display the displacement of the optical lens vibration.

7. The high-precision polishing device for optical lens processing according to claim 6, characterized in that, The buffer display assembly comprises a strain gauge (11), a driving tooth rod (12), a driving roller (13) and a transmission amplifier; the vacuum chuck base (2) is provided with a test chamber, one end of the strain gauge (11) is fixedly installed in the test chamber, the vacuum chuck base (2) is provided with a test sliding groove which is slidably matched with the driving tooth rod (12), the end of the driving tooth rod (12) is provided with a placing groove, the strain gauge (11) is located in the placing groove, the number of the driving rollers (13) is two, and the two driving rollers (13) are rotatably installed in the placing groove, and the two driving rollers (13) are respectively located on the two sides of the strain gauge (11). The transmission amplification member is used for amplifying the sliding displacement of the buffer adsorption sliding block (8) and converting it into the sliding displacement of the driving tooth rod (12).

8. The high-precision polishing device for optical lens processing according to claim 7, characterized in that, The transmission amplification member comprises a driving rack (14), a large gear (15) and a small gear (16); one end of the driving rack (14) is fixedly connected with the buffer adsorption sliding block (8); the large gear (15) is rotatably installed in the vacuum chuck base (2); the large gear (15) is engaged with the driving rack (14); the small gear (16) is rotatably installed in the vacuum chuck base (2); the small gear (16) is engaged with the large gear (15); and the small gear (16) is also engaged with the driving tooth rod (12).

9. The high-precision polishing device for optical lens processing according to claim 1, characterized in that, An end face threaded disc (17) is rotatably installed in the vacuum chuck base (2); and the end face threaded disc (17) is threadedly matched with the bottom transverse section of the C-shaped frame (4).

10. The high-precision polishing device for optical lens processing according to claim 1, characterized in that, A transparent door plate (18) is slidably installed on the polishing machine (1); and the transparent door plate (18) can block the opening of the polishing chamber.

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