A high-precision edge trimming and polishing device for freeform surface optical lenses

Abstract

This invention relates to the field of edge trimming and polishing equipment, specifically proposing a high-precision edge trimming and polishing equipment for freeform optical lenses. The equipment includes a lens body with convex sides; a standard part one, a standard component of the lens body; and a standard part two, a proportionally enlarged version of standard part one. This invention uses a positioning component and a clamping component to position and fix standard part one and the lens body, ensuring that the projection of any convex lens body and standard part one in a certain direction coincides. A support component supports standard part two, and a polishing component polishes the lens body. When standard part two rotates, it can drive the lens body to be polished. The clamping component does not require correction of the optical axis and reference axis, thus ensuring the accuracy of edge polishing. Furthermore, any lens body only requires the corresponding standard part one and standard part two for precise polishing, making it applicable to a wider range of applications.

Description

Technical Field

[0001] This invention relates to the field of trimming and polishing equipment technology, and specifically proposes a high-precision trimming and polishing equipment for freeform surface optical lenses. Background Technology

[0002] Freeform optical lenses are optical surface lenses whose surface shape cannot be described by mathematical formulas for spherical or aspherical surfaces. Their surface shape has a high degree of freedom and complexity, and can be customized according to specific optical needs. The processing steps generally include material selection, blank cutting, milling and polishing. During the milling and polishing process, the edges of the lens need to be trimmed. Usually, a clamping device is used to clamp the lens, and then an abrasive is used to trim and polish the edges of the lens.

[0003] Common edge trimming and polishing methods include two types: For lenses with circular sides, when using a clamping device to fix the lens, it is necessary to ensure that its optical axis and reference axis coincide to ensure that the lens can accurately control light. However, the alignment accuracy requirements between the optical axis and the reference axis are high during the clamping process, and it is difficult to achieve a perfect match in actual operation, which affects the optical performance of the finished product. When polishing lenses with non-circular sides (such as eyeglass lenses), the movement path of the abrasive plate is preset by the program, and the abrasive plate is driven to move along the non-circular contour trajectory. However, this type of polishing relies on a high-precision CNC system, which has high equipment costs and high operational complexity. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a high-precision edge trimming and polishing device for freeform optical lenses, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention employs the following technical solution: a high-precision edge trimming and polishing device for freeform surface optical lenses, used for polishing lens bodies with convex sides; comprising: a standard part one, a standard part of the lens body; a standard part two, a proportionally enlarged part of standard part one, wherein standard part one and standard part two are integrally formed, and the distance between their sides is the same at any position; a Y-axis; a positioning component, for positioning the lens body and standard part one so that their projections along the Y-axis completely coincide; a Z-axis; a clamping component movable along the Z-axis, for clamping and fixing the lens body and standard part two along the Y-axis; a driving component, for causing the clamping component to rotate; an X-axis; a polishing component, the working surface of which abuts against the side of the lens body and is movable along the X-axis; and a support component, the working surface of which abuts against the side of standard part two, wherein the working surfaces of the polishing component and the support component are parallel to each other.

[0006] Preferably, the positioning component includes: a worktable, the surface of which is fitted with a guide rail along the X-axis; a movable frame, mounted above the worktable and locked onto the surface of the guide rail, the surface of which is fitted with a plurality of movable rods that can move along the X-axis, the ends of which are fitted with rotatable extrusion plates, the sides of which are fitted with adhesive strips, the adhesive strips simultaneously abutting against the surfaces of the lens body and the first standard part.

[0007] Preferably, the clamping assembly includes: an inverted fixed frame, fixedly installed above the worktable, with guide grooves on both sides of the fixed frame along the Z-axis; a positioning rod that moves along the Y-axis, with the axial directions of the two positioning rods overlapping and suction cups fitted at their ends, the suction cups respectively adsorbing onto the surfaces of the lens body and the standard part two; and a connecting rod integrally formed with the standard part one, the ends of the connecting rod being fitted with the same suction cups, the suction cups adsorbing onto the surface of the lens body.

[0008] Preferably, the guide groove is fitted with a clamping plate that can move along the Y-axis, and the end of the positioning rod is fitted with a ball bearing that abuts against the surface of the clamping plate.

[0009] Preferably, the drive assembly includes: a crossbar with a raised surface, two gears symmetrically mounted on the surface of the crossbar, the ends of the crossbar extending into the interior of a guide groove; gears 2, respectively fixedly mounted on the surfaces of two positioning rods, the gears 2 meshing with gears 1; and a motor movably mounted on the surface of the fixed frame, the motor being movable along the Z-axis and used to drive the rotation of the crossbar.

[0010] Preferably, the surface of the fixing frame is fitted with a support plate, the surface of the support plate is fitted with a compressed support spring, the top of the support spring abuts against the surface of the motor, the surface of the crossbar is fitted with a lifting ring, the surface of the lifting ring is fitted with a suspension spring, and the top of the suspension spring is fixed to the surface of the fixing frame.

[0011] Preferably, the support assembly includes: a support frame placed on the ground; a transmission frame suspended directly above the support frame, the surface of which is fitted with an electric actuator for driving the transmission frame to move along the Z-axis; and a transmission belt for transmission along the X-axis, the transmission belt being fitted on the transmission frame, the surface of which abuts against the surface of the standard part two.

[0012] Preferably, the transmission frame is internally equipped with a pressure plate, which rests against the surface of the transmission belt.

[0013] Preferably, the polishing assembly includes: two transmission belts, both traveling along the X-axis, with multiple abrasive stones equidistantly mounted between the two transmission belts, the surfaces of the abrasive stones being completely horizontal and abutting against the side of the lens body; two mounting brackets, with a roller shaft for driving the transmission belts to move between the two mounting brackets; and two clamping sleeves, respectively mounted on both sides of the abrasive stones, the surfaces of the clamping sleeves being fitted with pressure rods, the surfaces of the pressure rods being fitted with rolling rings, and the rolling rings abutting against the inner wall of the mounting brackets.

[0014] Preferably, one end of the pressing rod is threaded, the end of the pressing rod threaded through the clamping sleeve and abuts against the side of the abrasive stone, and multiple mounting rings are equidistantly mounted on the surface of the transmission belt, and the pressing rod is locked inside the mounting rings.

[0015] The above technical solution has the following advantages or beneficial effects: The present invention provides a high-precision edge trimming and polishing device for freeform optical lenses. By setting a positioning component and a clamping component, the standard part one and the lens body are positioned and fixed, ensuring that the projection of any convex lens body and the standard part one in a certain direction coincides. The support component supports the standard part two, and the polishing component polishes the lens body. When the standard part two rotates, it can drive the lens body to be polished. At this time, the clamping component does not need to be corrected for the optical axis and the reference axis, which can ensure the accuracy of edge polishing. Moreover, any lens body only needs the corresponding standard part one and standard part two to be accurately polished, which has a wider range of applications. Attached Figure Description

[0016] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the spirit of the invention.

[0017] Figure 1 This is a three-dimensional structural diagram of a high-precision edge trimming and polishing device for freeform surface optical lenses provided by the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram illustrating the positioning state of the positioning component relative to the lens body.

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the positioning component.

[0020] Figure 4 This is a three-dimensional structural diagram of the clamping component.

[0021] Figure 5 yes Figure 4 A schematic diagram of the planar structure viewed along the X-axis.

[0022] Figure 6 yes Figure 5 The structure of the clamping component and the driving component.

[0023] Figure 7 This is a three-dimensional structural diagram of the polishing component.

[0024] Figure 8 This is a schematic diagram of the three-dimensional structure of the supporting components.

[0025] Figure 9 This is a schematic diagram of the partially disassembled structure of the supporting components.

[0026] Figure 10 This is a partial three-dimensional structural diagram of the supporting components.

[0027] Figure 11 This is a three-dimensional structural diagram of the abrasive stone in its installed state.

[0028] In the diagram: 1. Positioning assembly; 101. Worktable; 102. Guide rail; 103. Moving frame; 104. Moving rod; 105. Extrusion plate; 106. Adhesive strip; 2. Clamping assembly; 201. Fixing frame; 202. Guide groove; 203. Positioning rod; 204. Suction cup; 205. Connecting rod; 206. Clamping plate; 207. Ball bearing; 3. Grinding assembly; 301. Transmission belt; 302. Abrasive stone; 303. Mounting frame; 304. Roller shaft; 305. Clamping sleeve; 306. Pressing rod; 307. Roller ring; 4. Support assembly; 401. Support frame; 402. Transmission frame; 403. Conveyor belt; 404. Pressure plate; 405. Electric actuator; 5. Drive assembly; 501. Crossbar; 502. Gear 1; 503. Gear 2; 504. Motor; 6. Lens body; 7. Standard part 1; 8. Standard part 2; 9. Support plate; 10. Support spring; 11. Lifting ring; 12. Suspension spring; 13. Mounting ring. Detailed Implementation

[0029] 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.

[0030] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Note: For the sake of accuracy and consistency in the description of directions, in this paper, the X, Y, and Z axes correspond to the three directions in the Cartesian coordinate system.

[0032] Figure 1 This is a schematic diagram of the overall structure of a high-precision edge trimming and polishing equipment for freeform optical lenses. The optical lens to be polished is a lens body 6 with a freeform surface and convex sides. The shape of the lens body 6 can be circular or non-circular.

[0033] like Figures 1-2 As shown, during polishing, standard part 7 of the lens body 6 and standard part 8, which are enlarged proportionally to standard part 7, are required. Standard part 7 and standard part 8 can be integrally formed by casting or injection molding. It is necessary to ensure that the distance between the sides of standard part 7 and standard part 8 is the same at any position.

[0034] like Figure 1 and Figure 3 As shown, a positioning component 1 is placed below the lens body 6, standard part 1 7, and standard part 2 8 for positioning and fixing the lens body 6, standard part 1 7, and standard part 2 8. The positioning component 1 includes a worktable 101, which is divided into two symmetrical halves and located on the symmetrical sides of the lens body 6, standard part 1 7, and standard part 2 8, respectively. A guide rail 102 is mounted along the X-axis of the surface of the worktable 101, and a movable frame 103 is mounted on the guide rail 102.

[0035] In this embodiment, the surface of the movable frame 103 is equipped with at least two movable rods 104 that can move along the X-axis. The movable rods 104 can be driven by an electric push rod (not shown in the figure). The ends of the movable rods 104 are equipped with rotatable pressing plates 105 to ensure that when the pressing plates 105 abut against the surfaces of the lens body 6 and the standard part 7, they can rotate and fit together with the curvature of the surfaces of both. The sides of the pressing plates 105 are provided with adhesive strips 106 by adhesive bonding. The adhesive strips 106 abut against the surfaces of the lens body 6 and the standard part 7 at the same time.

[0036] When the electric push rod moves the moving rod 104, it will cause the extrusion plate 105 and the adhesive strip 106 to gradually approach the standard part 7 and the lens body 6, until the adhesive strip 106 presses against the sides of both. Due to the deformable nature of the adhesive strip 106 itself, it can ensure the extrusion and adhesion, so that the projection of the lens body 6 and the standard part 7 along the Y-axis coincides.

[0037] like Figure 1 , Figures 4-6As shown, after the position of the lens body 6 is determined, the position of the lens body 6 is fixed by the clamping assembly 2. The clamping assembly 2 includes a U-shaped inverted fixing frame 201, which is fixedly mounted in the center above the worktable 101. The fixing frame 201 is equipped with two positioning rods 203 that move along the Y-axis. The opposite ends of the two positioning rods 203 are equipped with suction cups 204. It should be noted that the suction cups 204 only play an auxiliary role in adsorption. It is still necessary to ensure that the positioning rods 203 are rigidly pressed against the surfaces of the lens body 6 and the standard part 8 to minimize the offset generated during rotation. Guide grooves 202 are provided on both sides of the fixing frame 201. The ends of the positioning rods 203 are located inside the guide grooves 202 and move along the Z-axis.

[0038] A connecting rod 205 is integrally formed on the surface of standard part 7. The position of the connecting rod 205 does not need to be limited. Similarly, a suction cup 204 is provided at the end of the connecting rod 205. The suction cup 204 at this position is attached to the surface of the lens body 6, so that the lens body 6, standard part 7 and standard part 8 are an integral structure.

[0039] A clamping plate 206 is installed inside the guide groove 202. The clamping plate 206 can be driven to move along the Y-axis by an electric push rod. A ball bearing 207 is installed at the end of the positioning rod 203. The ball bearing 207 abuts against the surface of the clamping plate 206 to ensure that when the lens body 6, standard part 1 7 and standard part 2 8 move along the Z-axis as a whole, the flow is smoother and more stable.

[0040] like Figure 1 , Figure 7 , Figures 10-11 As shown, a polishing assembly 3 is assembled in the positive direction of the lens body 6 to polish and trim the side edges of the lens body 6. The polishing assembly 3 includes two transmission belts 301, which move along the X-axis. The transmission is axial, and multiple abrasive stones 302 are installed between two transmission belts 301. It should be noted that the distance between the abrasive stones 302 is greater than the width of the abrasive stones 302 themselves. Clamping sleeves 305 are provided on both sides of the abrasive stones 302. The clamping sleeves 305 can be made of metal and use their deformability to clamp and fix the abrasive stones 302 to facilitate the replacement of the abrasive stones 302. The surface of the clamping sleeves 305 is integrally formed with a pressure rod 306. Multiple mounting rings 13 are provided on the surface of the transmission belts 301. The pressure rod 306 is locked inside the mounting rings 13 by friction. The end of the pressure rod 306 is provided with a thread. The position of the pressure rod 306 is changed by rotating the thread, so that the end of the pressure rod 306 abuts against the surface of the abrasive stone 302 to prevent the abrasive stone 302 from falling off during use. It should be noted that the abrasive stone 302 is tangent to the lens body 6.

[0041] Two mounting brackets 303 are provided, and a roller 304 is assembled between the mounting brackets 303 to drive the transmission of two transmission belts 301. A roller ring 307 is adjusted on the surface of the pressure rod 306. The roller ring 307 abuts against the inside of the mounting bracket 303 to reduce the friction between the abrasive stone 302 and the mounting bracket 303 during movement.

[0042] like Figure 1 , Figures 8-9 As shown, a support assembly 4 is provided below the standard part 2 8 to abut against the surface of the standard part 2 8. The support assembly 4 includes a support frame 401 placed on the ground. A transmission frame 402 is mounted directly above the support frame 401. An electric actuator 405 is mounted on the surface of the support frame 401 to drive the transmission frame 402 to move along the Z-axis. Multiple guide rods are also mounted above the support frame 401 to prevent the transmission frame 402 from shifting along the Y-axis and Z-axis. A conveyor belt 403 is also mounted on the transmission frame 402 to transmit along the X-axis. The side of the standard part 2 8 abuts against the conveyor belt 403. A pressure plate 404 is mounted inside the transmission frame 402 to provide support for the standard part 2 8.

[0043] like Figures 5-6 As shown, a drive assembly 5 is installed inside the fixed frame 201 to rotate the standard part 8. When the standard part 8 rotates, its surface is constantly pressed against the conveyor belt 403. Due to the transmission of the conveyor belt 403, the wear generated by the standard part 8 during rotation can be effectively reduced, and the accuracy of the grinding process can be improved. The drive assembly 5 includes a crossbar 501 with a protrusion on its surface. Two symmetrically placed lifting rings 11 are sleeved on the surface of the crossbar 501. Suspension springs 12 are installed on the surface of the lifting rings 11, and the top of the suspension springs 12 is fixed to the surface of the fixed frame 201. Two gears 502 are symmetrically mounted on the surface of the crossbar 501. The gears 502 are adapted to the protrusions of the crossbar 501. The end of the crossbar 501 extends into the interior of the guide groove 202. Gears 503 are mounted on the surfaces of the two positioning rods 203. Gears 503 mesh with gears 502. The surface of the fixing frame 201 is equipped with a support plate 9 and a motor 504. The motor 504 can move along the Z-axis and is used to drive the rotation of the crossbar 501. The surface of the support plate 9 is equipped with a compressed support spring 10. The top of the support spring 10 abuts against the surface of the motor 504.

[0044] The rotation of motor 504 drives the crossbar 501 to rotate, and through the meshing of gear 1 502 and gear 2 503, it drives the positioning rod 203 to rotate. When the standard part 2 8 rotates, its surface is constantly pressed against the surface of the conveyor belt 403, which can drive the positioning rod 203 to move along the Z-axis, indirectly causing the lens body 6 to move. At this time, it can be ensured that the edge of the lens body 6 is pressed against the surface of the abrasive stone 302. The movement of the abrasive stone 302 can achieve the grinding of the edge of the lens body 6.

[0045] This invention provides a high-precision edge trimming and polishing device for freeform optical lenses. The operator places the lens body 6, standard part 1 7, and standard part 2 8 inside the fixing frame 201. A push rod drives the moving rod 104, causing the extrusion plate 105 and the adhesive strip 106 to gradually approach the standard part 1 7 and the lens body 6 until the adhesive strip 106 abuts against their sides. The clamping plate 206 can be driven by an electric push rod along the Y-axis. The axis moves until the suction cup 204 abuts against the surface of the lens body 6 and the standard part 2 8. At this time, the lens body 6 abuts against the surface of the abrasive stone 302, and the standard part 2 8 abuts against the surface of the conveyor belt 403. The transmission belt 301, the conveyor belt 403, and the motor 504 start simultaneously. The rotation of the motor 504 drives the crossbar 501 to rotate. Through the meshing of gear 1 502 and gear 2 503, the positioning rod 203 is driven to rotate. When the standard part 2 8 rotates, since its surface is constantly abutting against the surface of the conveyor belt 403, the positioning rod 203 can be driven to move along the Z-axis. At the same time, the lens body 6 also moves because of the connection between the positioning rod 203 and the suction cup 204, ensuring that the edge of the lens body 6 is always abutting against the surface of the abrasive stone 302 for grinding, thereby achieving the grinding and trimming of the edge of the lens body 6.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A high-precision edge trimming and polishing device for freeform optical lenses, used for polishing lens bodies with convex sides, characterized in that: include Standard part one: Standard parts for the lens body; Standard part two is a proportionally enlarged version of standard part one. Standard part one and standard part two are integrally formed, and the distance between their sides is the same at any position. The positioning component positions the lens body and standard part one so that their projections along the Y-axis completely coincide. The clamping assembly moves along the Z-axis and clamps and fixes the lens body and the standard part along the Y-axis. Drive the component to make the clamping component rotate; The polishing assembly for polishing the lens body has its working surface pressed against the side of the lens body and can move along the X-axis; The working surface of the support assembly that supports the second standard part rests against the side of the second standard part, and the working surfaces of the grinding assembly and the support assembly are parallel to each other; The support components include: A support frame placed on the ground; A transmission frame is suspended directly above a support frame, and the surface of the support frame is fitted with electric actuators for driving the transmission frame to move along the Z-axis. A conveyor belt that transports along the X-axis is mounted on a conveyor frame, and the surface of the conveyor belt abuts against the surface of standard part two. The polishing components include: Two transmission belts, both traveling along the X-axis, are equipped with multiple abrasive stones at equal intervals between them. The surfaces of the abrasive stones are completely horizontal and rest against the side of the lens body. Two mounting brackets, with a roller shaft for driving the transmission belt between the two mounting brackets; Two clamping sleeves are installed on both sides of the abrasive stone. The surface of the clamping sleeve is fitted with a pressure rod, and the surface of the pressure rod is fitted with a rolling ring. The rolling ring abuts against the inner wall of the mounting frame.

2. The high-precision trimming and polishing equipment for freeform optical lenses according to claim 1, characterized in that: The positioning component includes: A worktable, the surface of which is fitted with guide rails along the X-axis; A movable frame is installed above the worktable and locked onto the surface of the guide rail. The surface of the movable frame is equipped with multiple movable rods that can move along the X-axis. The ends of the movable rods are equipped with rotatable extrusion plates. The sides of the extrusion plates are equipped with adhesive strips, which simultaneously abut against the surfaces of the lens body and the standard part.

3. The high-precision trimming and polishing equipment for freeform optical lenses according to claim 2, characterized in that: The clamping assembly includes: A U-shaped inverted fixing frame is fixedly installed above the worktable, and guide grooves are provided on both sides of the fixing frame along the Z-axis; A positioning rod that moves along the Y-axis, the two positioning rods having axial overlap and suction cups at their ends, the suction cups being respectively attached to the surfaces of the lens body and the standard part two; A connecting rod integrally formed with a standard part, the end of which is fitted with the same suction cup, which is adsorbed onto the surface of the lens body.

4. The high-precision trimming and polishing equipment for freeform surface optical lenses according to claim 3, characterized in that: The guide groove is fitted with a clamping plate that can move along the Y-axis, and the end of the positioning rod is fitted with a ball bearing that abuts against the surface of the clamping plate.

5. The high-precision trimming and polishing equipment for freeform surface optical lenses according to claim 4, characterized in that: The driving component includes: The surface is provided with a raised crossbar, and two gears are symmetrically mounted on the surface of the crossbar. The end of the crossbar extends into the interior of the guide groove. Gear 2 is fixedly mounted on the surfaces of the two positioning rods, and gear 2 meshes with gear 1. A motor is mounted on the surface of the fixed frame, the motor being movable along the Z-axis and used to drive the rotation of the crossbar.

6. The high-precision trimming and polishing equipment for freeform surface optical lenses according to claim 5, characterized in that: The surface of the fixed frame is fitted with a support plate, the surface of the support plate is fitted with a compressed support spring, the top of the support spring abuts against the surface of the motor, the surface of the crossbar is fitted with a lifting ring, the surface of the lifting ring is fitted with a suspension spring, and the top of the suspension spring is fixed to the surface of the fixed frame.

7. The high-precision trimming and polishing equipment for freeform surface optical lenses according to claim 1, characterized in that: The transmission frame is equipped with a pressure plate inside, which rests against the surface of the conveyor belt.

8. The high-precision trimming and polishing equipment for freeform surface optical lenses according to claim 7, characterized in that: One end of the pressure rod is threaded, and the threaded end of the pressure rod passes through the clamping sleeve and abuts against the side of the abrasive stone. Multiple mounting rings are equidistantly mounted on the surface of the transmission belt, and the pressure rod is locked inside the mounting rings.

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