Multi-station vacuum chuck for optical lens milling and grinding

Abstract

The utility model discloses a kind of multi-station vacuum chuck for optical lens milling and grinding, including support bracket, there are several positioning slots in array on support bracket, air bag is equipped in positioning slot, air bag is equipped with air hole group on it, air bag is used to fit the arcuate structure of optical lens, connecting frame is equipped on support bracket, connecting frame is used to connect mechanical arm, when air bag adsorption recess, positioning slot can be fitted with the outer diameter of the cylindrical structure of optical lens, annular abutting member is equipped in air bag, annular abutting member is used to prevent optical lens from excessive upshift in positioning slot. Through the synergistic effect of flexible air bag and rigid positioning slot, lossless, stable grabbing of resin optical lens is realized: air bag is adaptively fitted with lens arcuate back under the action of vacuum, provides uniform adsorption force;Positioning slot carries out radial guidance to lens cylindrical periphery, reduces deviation;Annular abutting member effectively limits lens axial displacement, prevents lens from separating from positioning area due to adsorption too strong. Overall applicable to automatic feeding and discharging scene.

Description

Technical Field

[0001] This utility model relates to the field of automated processing technology of optical components, and in particular to a multi-station vacuum chuck for milling optical lenses. Background Technology

[0002] In the milling process of resin optical lenses, vacuum chucks are needed to stably grip and position the lenses to ensure processing accuracy and avoid surface damage. Multi-station designs can significantly improve production line cycle time and efficiency; therefore, developing flexible and highly reliable vacuum adsorption devices suitable for curved lenses is of great significance.

[0003] Traditional vacuum suction cups mostly use rigid planar adsorption structures, which are difficult to fit the arched back of the lens, easily leading to weak adsorption or local stress concentration; some flexible suction nozzles can conformally fit, but lack radial guidance and axial limiting, making the lens easy to shift or be over-inhaled, affecting positioning accuracy, and making it difficult to achieve stable synchronous operation in multiple stations. Utility Model Content

[0004] The purpose of this invention is to provide a multi-station vacuum chuck for milling optical lenses, so as to solve the problem mentioned in the background art that traditional chucks are difficult to achieve both curved surface conformal bonding and multi-station adsorption at the same time.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-station vacuum chuck for milling optical lenses, comprising a support frame, an array of positioning grooves on the support frame, an air bladder inside the positioning groove, an air hole group on the air bladder, the air bladder being used to fit the arched structure of the optical lens, a connecting frame on the support frame being used to connect a robotic arm, when the air bladder adsorbs and sinks, the positioning groove can fit with the outer diameter of the cylindrical structure of the optical lens, and an annular abutment is provided inside the air bladder, the annular abutment being used to prevent the optical lens from moving excessively upward in the positioning groove.

[0006] Based on the preferred embodiment of this technical solution, the thickness of the side of the airbag that is in contact with the arched structure is 50% to 70% of the thickness of the side of the airbag that is in contact with the positioning groove, and the positioning groove is provided with a Teflon coating.

[0007] Based on the preferred embodiment of this technical solution, when the side of the airbag that is in contact with the arched structure arches upward, it can cause the sidewall of the airbag to bend. The airbag is made of fluororubber.

[0008] In a preferred embodiment of this technical solution, the air hole group includes a first hole, a second hole, and a third hole. The bottom of the airbag is integrally formed with a first annular ring, a second annular ring, and a third annular ring. The first hole is located inside the first annular ring, the second hole is located between the first annular ring and the second annular ring, and the third hole is located between the second annular ring and the third annular ring.

[0009] In a preferred embodiment of this technical solution, the top of the airbag is provided with a fourth hole, a mounting block is connected to the support frame, a channel is provided on the mounting block, the airbag is attached to the mounting block, the fourth hole and the channel are coaxially arranged, and an air guiding component is provided on the mounting block.

[0010] Based on the preferred embodiment of this technical solution, the mounting block is provided with a fitting positioning ring, which is coaxially arranged with the airbag. A positioning cylinder can be inserted into the fitting positioning ring, and the positioning cylinder is used to assist in the positioning and installation of the airbag.

[0011] In a preferred embodiment of this technical solution, the air guiding component includes a connecting pipe inserted into the channel, an annular abutment integrally formed on the connecting pipe, and a rubber disc attached to the outer wall of the connecting pipe, which can be attached to the mounting block.

[0012] Based on the preferred embodiment of this technical solution, the air guiding component includes a connecting groove for connecting different channels, an installation groove on the mounting block, a sealing ring installed in the installation groove, a cover plate installed in the installation groove, a connecting pipe inserted into the cover plate, a rubber disc adhered to the outer wall of the connecting pipe, the rubber disc being able to adhere to the cover plate, the diameter of the fourth hole being larger than the channel diameter, and an annular abutment integrally formed at the bottom of the mounting block, the annular abutment being able to be coaxially arranged with the cylindrical structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. Through the synergistic effect of flexible fluororubber airbags and positioning grooves, adaptive bonding to the arched back of the resin lens and radial guidance to the cylindrical outer edge are achieved, resulting in stable adsorption and a low probability of surface damage.

[0014] 2. The integrated ring-shaped abutment and multi-hole partitioned air passage structure effectively limit the axial displacement of the lens and support multi-station synchronous vacuum drive, improving positioning accuracy and automated operation efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of one embodiment of the multi-station vacuum chuck for milling optical lenses according to the present invention; Figure 2 This is a schematic diagram of the airbag structure of this utility model; Figure 3 This is a schematic diagram of the channel structure of this utility model; Figure 4 This is a schematic diagram of the rubber disc structure of this utility model; Figure 5 This is a schematic diagram of the cover plate structure of this utility model; Figure 6 This is a schematic diagram of the connecting groove structure of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Support bracket; 101. Positioning groove; 11. Connecting bracket; 2. Airbag; 20. Fourth hole; 21. First annular ring; 210. First hole; 22. Second annular ring; 220. Second hole; 23. Third annular ring; 230. Third hole; 3. Mounting block; 32. Fitting positioning ring; 33. Channel; 34. Connecting groove; 35. Mounting groove; 351. Sealing ring; 4. Optical lens; 41. Columnar structure; 42. Arched structure; 51. Rubber disc; 52. Connecting pipe; 521. Annular abutment; 61. Cover plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-6 This utility model provides an embodiment: a multi-station vacuum chuck for milling optical lenses, including a support frame 1, with a plurality of positioning grooves 101 arrayed on the support frame 1, an airbag 2 provided in the positioning groove 101, and an air hole group provided on the airbag 2. The airbag 2 is used to fit the arched structure 42 of the optical lens 4. The support frame 1 is provided with a connecting frame 11, which is used to connect a robotic arm. When the airbag 2 is adsorbed and recessed, the positioning groove 101 can fit with the outer diameter of the cylindrical structure 41 of the optical lens 4. An annular abutment 521 is provided in the airbag 2, which is used to prevent the optical lens 4 from moving excessively upward in the positioning groove 101. The flexible airbag 2 and the rigid positioning groove 101 work together to achieve non-destructive and stable gripping of resin optical lenses: the airbag 2 adaptively conforms to the arched back of the lens under vacuum, providing uniform adsorption force; the positioning groove 101 radially guides the cylindrical outer edge of the lens, reducing offset; and the annular abutment 521 effectively restricts the axial displacement of the lens, preventing the lens from detaching from the positioning area due to excessive adsorption. The entire system is suitable for automated loading and unloading scenarios, balancing positioning accuracy, adsorption reliability, and lens surface protection, and is particularly suitable for efficient workflow before and after milling processes.

[0019] Please see Figure 1-5A further solution based on this embodiment is as follows: the thickness of the side of the airbag 2 that is in contact with the arched structure 42 is 50% to 70% of the thickness of the side of the airbag 2 that is in contact with the positioning groove 101, and the positioning groove 101 is coated with Teflon. This thickness ratio design makes the top of the airbag 2 more flexible and deformable, and can better conformally fit the arched surface of the lens with different curvatures, while the thicker bottom ensures the structural support strength; the Teflon coating significantly reduces the coefficient of friction between the cylindrical structure 41 of the lens and the positioning groove 101, avoiding scratches or stress marks on the resin lens during insertion or removal, and improving the yield rate. If the thickness ratio is less than 50%, the airbag 2 is prone to breakage, and if the thickness ratio is more than 70%, the deformability of the airbag 2 is poor.

[0020] Please see Figure 1-4 A further embodiment of this solution is as follows: when the side of the airbag 2 that is in contact with the arched structure 42 arches upward, it can cause the sidewall of the airbag 2 to bend. The airbag 2 is made of fluororubber. Fluororubber has excellent elasticity, aging resistance and chemical stability. During the vacuuming process, the airbag 2 is deformed by negative pressure and, driven by the robotic arm, fits into the arched structure 42 of the optical lens 4, while simultaneously causing the sidewall to bend inward, so that the lens rises slightly and is embedded in the positioning groove 101.

[0021] Please see Figure 2-3 A further embodiment of this solution is as follows: the pore group includes a first pore 210, a second pore 220, and a third pore 230. The bottom of the airbag 2 is integrally formed with a first annular ring 21, a second annular ring 22, and a third annular ring 23. The first pore 210 is located within the first annular ring 21, the second pore 220 is located between the first annular ring 21 and the second annular ring 22, and the third pore 230 is located between the second annular ring 22 and the third annular ring 23. This multi-pore partitioning combined with the multi-annular ring structure can create a gradient negative pressure in different areas of the airbag 2, effectively adapting to the curvature difference between the lens edge and center, and improving sealing uniformity. Even if there is a minor leak in a localized area, other areas can still maintain adsorption force, significantly improving the system's fault tolerance and adsorption stability.

[0022] Please see Figure 2-4 A further embodiment of this solution is as follows: The top of the airbag 2 has a fourth hole 20. A mounting block 3 is connected to the support frame 1. A channel 33 is opened on the mounting block 3. The airbag 2 is adhered to the mounting block 3. The fourth hole 20 and the channel 33 are coaxially arranged. An air guiding component is provided on the mounting block 3. The coaxial design of the fourth hole 20 and the channel 33 ensures the shortest airflow path and the least resistance, thereby improving the vacuuming efficiency.

[0023] Please see Figure 2-3A further solution based on this embodiment is as follows: The mounting block 3 is provided with a fitting positioning ring 32, which is coaxially arranged with the airbag 2. A positioning cylinder can be inserted into the fitting positioning ring 32, and the positioning cylinder is used to assist in the positioning and installation of the airbag 2. The fitting positioning ring 32, in conjunction with the positioning cylinder, enables the airbag 2 to be quickly and accurately aligned and installed, avoiding eccentricity, improving assembly efficiency and repeatability, and is particularly suitable for production line maintenance or airbag 2 replacement scenarios.

[0024] Please see Figure 3-4 A further embodiment of this solution is as follows: the gas guiding assembly includes a connecting pipe 52 inserted into the channel 33, an annular abutment 521 integrally formed on the connecting pipe 52, and a rubber disc 51 adhered to the outer wall of the connecting pipe 52, which can adhere to the mounting block 3. In this embodiment, the annular abutment 521 is integrated into the connecting pipe 52, and the abutment position can be finely adjusted by adjusting the insertion depth of the connecting pipe 52; the rubber disc 51 provides a secondary seal to prevent gas leakage from the gap between the connecting pipe 52 and the mounting block 3, ensuring the airtightness of the vacuum system.

[0025] For a second embodiment of the air guiding assembly, please refer to [link / reference]. Figure 5-6 A further solution based on this embodiment is as follows: the air guiding assembly includes a connecting groove 34 connecting different channels 33, and the mounting block 3 is also provided with a mounting groove 35. A sealing ring 351 is installed in the mounting groove 35, and a cover plate 61 is installed in the mounting groove 35. A connecting pipe 52 is inserted into the cover plate 61, and a rubber disc 51 is attached to the outer wall of the connecting pipe 52. The rubber disc 51 can be attached to the cover plate 61. The diameter of the fourth hole 20 is larger than the diameter of the channel 33. The annular abutment 521 is integrally formed at the bottom of the mounting block 3, and the annular abutment 521 can be coaxially set with the cylindrical structure 41. This embodiment connects multiple channels 33 through the connecting groove 34, and achieves an integrated sealing structure of the air path with the cover plate 61 and the sealing ring 351. It can be driven by the same vacuum source to work together in multiple positioning grooves 101. Each air bag 2 is synchronously adsorbed under unified negative pressure control, ensuring that multiple optical lenses 4 are stably grasped and positioned at the same time, significantly improving the loading and unloading efficiency and cycle consistency.

[0026] Working principle: First, the support frame 1 is installed on the end of the robotic arm via the connecting frame 11; the robotic arm drives the support frame 1 downward, so that the bottom of each airbag 2 lightly touches the arched structure 42 of the resin optical lens 4 to be grasped below; then, the air vent assembly evacuates the air hole group inside the airbag 2, and the airbag 2 undergoes flexible deformation under negative pressure, with its bottom facing downward to fit the curved surface of the lens, while the sidewall bends inward, generating a uniform adsorption force and slightly lifting the optical lens 4, so that its cylindrical structure 41 is embedded in the corresponding positioning groove 101; the positioning groove 101 provides radial guidance for the lens, and the annular abutment 521 restricts the lens from moving too high, ensuring that it is stably positioned in the groove; after adsorption is completed, the robotic arm lifts the support frame 1, realizing the synchronous grasping and transfer of multiple lenses at multiple stations, which is suitable for automated operation processes of loading before milling or unloading after milling. The basic principle of vacuum adsorption and the connection method of the end effector of the robotic arm involved in this utility model are all common knowledge or existing technologies in the field of optical automated assembly and precision fixtures. Those skilled in the art can directly select or adapt them according to actual needs.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-station vacuum chuck for milling optical lenses, characterized in that: It includes a support frame (1), on which several positioning grooves (101) are arranged. An airbag (2) is provided in the positioning groove (101). An air hole group is provided in the airbag (2). The airbag (2) is used to fit the arched structure (42) of the optical lens (4). A connecting frame (11) is provided on the support frame (1). The connecting frame (11) is used to connect the robotic arm. When the airbag (2) is adsorbed and recessed, the positioning groove (101) can fit with the outer diameter of the cylindrical structure (41) of the optical lens (4). An annular abutment (521) is provided in the airbag (2). The annular abutment (521) is used to prevent the optical lens (4) from moving excessively upward in the positioning groove (101).

2. The multi-station vacuum chuck for milling optical lenses according to claim 1, characterized in that: The thickness of the side of the airbag (2) that is in contact with the arch structure (42) is 50% to 70% of the thickness of the side of the airbag (2) that is in contact with the positioning groove (101), and the positioning groove (101) is provided with a Teflon coating.

3. The multi-station vacuum chuck for milling optical lenses according to claim 2, characterized in that: When the side of the airbag (2) that is in contact with the arched structure (42) arches upward, it can cause the side wall of the airbag (2) to bend. The airbag (2) is made of fluororubber.

4. The multi-station vacuum chuck for milling optical lenses according to claim 3, characterized in that: The air hole group includes a first hole (210), a second hole (220), and a third hole (230). The bottom of the airbag (2) is integrally formed with a first annular ring (21), a second annular ring (22), and a third annular ring (23). The first hole (210) is located inside the first annular ring (21), the second hole (220) is located between the first annular ring (21) and the second annular ring (22), and the third hole (230) is located between the second annular ring (22) and the third annular ring (23).

5. The multi-station vacuum chuck for milling optical lenses according to claim 4, characterized in that: The airbag (2) has a fourth hole (20) at the top. The support bracket (1) is connected to the mounting block (3). The mounting block (3) has a channel (33). The airbag (2) is attached to the mounting block (3). The fourth hole (20) and the channel (33) are coaxially arranged. The mounting block (3) has an air guiding component.

6. The multi-station vacuum chuck for milling optical lenses according to claim 5, characterized in that: The mounting block (3) is provided with a fitting positioning ring (32), which is coaxially arranged with the airbag (2). A positioning cylinder can be inserted into the fitting positioning ring (32), which is used to assist in the positioning and installation of the airbag (2).

7. The multi-station vacuum chuck for milling optical lenses according to claim 6, characterized in that: The air guiding assembly includes a connecting pipe (52) inserted into the channel (33), an annular abutment (521) integrally formed on the connecting pipe (52), and a rubber disc (51) attached to the outer wall of the connecting pipe (52). The rubber disc (51) can be attached to the mounting block (3).

8. The multi-station vacuum chuck for milling optical lenses according to claim 6, characterized in that: The air guiding assembly includes a connecting groove (34) connecting different channels (33), and a mounting groove (35) is also provided on the mounting block (3). A sealing ring (351) is installed in the mounting groove (35), and a cover plate (61) is installed in the mounting groove (35). A connecting pipe (52) is inserted on the cover plate (61). A rubber disc (51) is attached to the outer wall of the connecting pipe (52). The rubber disc (51) can be attached to the cover plate (61). The diameter of the fourth hole (20) is larger than the diameter of the channel (33). The annular abutment (521) is integrally formed on the bottom of the mounting block (3). The annular abutment (521) can be coaxially set with the columnar structure (41).

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