Lens clamping jig, fitting production line and clamping method

Abstract

The application discloses a lens clamping jig, a bonding production line and a clamping method. The lens clamping jig comprises a jig base body, a sealed floating assembly and a vacuum adsorption assembly. The jig base body is provided with a lens bearing area. The sealed floating assembly is arranged in the lens bearing area and can be in flexible contact with the lens and self-adaptively float. The vacuum adsorption assembly is communicated with the lens bearing area and is used for forming negative pressure adsorption to fix the lens. The application realizes flexible support of the lens through the sealed floating assembly, avoids scratches, edge collapse and stress accumulation caused by hard contact, forms uniform negative pressure relying on the vacuum adsorption assembly, makes the overall stress of the lens stable, eliminates the warping and deformation risks caused by excessive local suction force, and guarantees the flatness and shape precision of the optical lens. Meanwhile, the jig base body remains rigid and stable and is not deformed in the clamping process, further ensuring accurate positioning and reliable clamping of the lens and meeting the high-speed and high-precision operation requirements of the automatic production line.

Description

Technical Field

[0001] The present invention relates to the technical field of lens clamping, and particularly to a lens clamping fixture, a bonding production line, and a clamping method. Background Art

[0002] In the automated bonding, assembly, and precision machining production lines of optical lenses, the lens clamping fixture is the core component to ensure positioning accuracy, surface quality, and production stability. Most of the currently commonly used lens fixtures in the industry are hard substrates with fixed sealing structures. Usually, straight grooves are opened on the bearing surface of the fixture and the sealing parts are fixedly installed in the grooves. The sealing parts cannot generate adaptive floating. When there are size deviations in the lenses or there are slight differences in the placement positions, rigid contact is easily formed between the fixture and the lenses, which is extremely likely to cause scratches, stress concentration, or deformation on the lens surface. At the same time, the sealing parts with fixed structures and the grooves make a single fixture can only be adapted to a single specification of lens, with poor versatility, high tool change cost, and most traditional fixtures do not form a matching connection structure with the automated robotic arm, making it difficult to be directly applied to the high-frequency and high-precision linkage operations of a six-axis automated production line, and unable to meet the high-precision, high-versatility, and high-yield requirements of modern optical lens automated production. Summary of the Invention

[0003] Embodiments of the present invention provide a lens clamping fixture, a bonding production line, and a clamping method, which are used to solve the technical problems that the existing lens fixtures cannot adapt to the size deviation of lenses, are easy to damage the lenses, and have poor adaptability.

[0004] To solve the above problems, according to one aspect of the present application, embodiments of the present invention provide a lens clamping fixture, including a fixture base body, and the fixture base body has a lens bearing area; a sealing and floating component for making flexible contact with the lens and adapting to float is arranged in the lens bearing area; a vacuum adsorption component is arranged inside the fixture base body, and the vacuum adsorption component is connected to the lens bearing area and is used to form a negative pressure adsorption to fix the lens in the lens bearing area.

[0005] In some embodiments, the sealing and floating component includes a sealing part and a floating groove body, the floating groove body is recessed in the lens bearing area, the sealing part is embedded in the floating groove body, and the sealing part can generate elastic displacement along the groove wall of the floating groove body.

[0006] In some embodiments, the groove wall of the floating groove body has a concave structure arranged along the radial direction of the sealing part, the outer wall of the sealing part can be fitted with the concave structure, and the sealing part can perform elastic displacement along the inner wall of the concave structure.

[0007] In some embodiments, the recessed structure is recessed inward toward the center of the seal; the lower part of the recessed structure is used to push the seal upward so that the seal and the lens form a sealed fit; the upper part of the recessed structure is used to axially limit the seal and restrict the seal from coming off upward.

[0008] In some embodiments, the seal is an annular seal; the annular seal is an O-ring or a shaped O-ring, and the top of the seal protrudes from the surface of the lens bearing area.

[0009] In some embodiments, the seal is configured as two layers, with the two layers of seals arranged vertically in the axial direction to form a positional difference, and each layer of seals has a corresponding floating groove.

[0010] In some embodiments, the vacuum adsorption assembly includes a suction section, a collection section, a diversion section, and an adsorption channel connected in sequence; the suction section extends to the outer wall of the fixture substrate; the collection section is a continuous annular groove arranged circumferentially; the diversion section is a multi-segment independent groove evenly distributed circumferentially; one end of the diversion section is connected to the collection section, and the other end is connected to the adsorption channel; the adsorption channel is a continuous annular groove arranged circumferentially, and the adsorption channel is located below the lens-bearing area; wherein, the circumferential direction refers to the circumferential direction of the lens-bearing area.

[0011] In some embodiments, the vacuum adsorption assembly further includes a gas path sealing unit, which includes two sealing rings arranged axially spaced apart, both of which are disposed at the mating position between the suction section and the fixture substrate.

[0012] In some embodiments, the vacuum adsorption assembly further includes an air connector, a vacuum channel sealing plate, and a sealing plug; the air connector is installed at the outer end of the suction section, the vacuum channel sealing plate covers the fixture base and closes the openings of the collection section and the diversion section, and the sealing plug seals the gas path process hole of the fixture base.

[0013] In some embodiments, the fixture base is further provided with a positioning detection sensor and a clamping assembly. The positioning detection sensor is used to detect the placement position of the lens, and the clamping assembly includes a stepper drive mechanism and a clamping block. The clamping assembly is used to perform a clamping action on the lens.

[0014] According to another aspect of this application, an embodiment of the present invention provides a lens bonding production line, including a six-axis robotic arm, a negative pressure system, a linkage controller, and the aforementioned lens clamping fixture. The six-axis robotic arm is connected to the lens clamping fixture via a connecting part, and the negative pressure system is connected to the inlet of a vacuum adsorption component.

[0015] According to another aspect of this application, an embodiment of the present invention provides an automated lens clamping method applied to the above-mentioned lens clamping fixture, comprising: placing a lens in a lens bearing area, so that the lens flexibly contacts a sealing floating component and achieves adaptive floating; and forming a negative pressure in the lens bearing area by a vacuum adsorption component to adsorb and fix the lens.

[0016] In some embodiments, when the lens is placed in the lens bearing area, the lens presses against the seal, causing the seal to elastically displace along the inner wall of the recessed structure to adapt to the size deviation of the lens.

[0017] In some embodiments, after the lens is placed in position, the positioning detection sensor detects the positioning status, and the linkage controller controls the clamping assembly to clamp and position the lens according to the positioning qualified signal.

[0018] Compared with the prior art, the lens clamping fixture of the present invention has the following beneficial effects: The lens clamping fixture provided by the present invention includes a fixture base, the fixture base having a lens bearing area; a sealing floating component for flexibly contacting and adaptively floating with the lens is provided in the lens bearing area; a vacuum adsorption component is provided inside the fixture base, the vacuum adsorption component being connected to the lens bearing area and used to form a negative pressure in the lens bearing area to adsorb and fix the lens.

[0019] To address the issue of traditional rigid fixtures easily damaging lenses, the sealed floating assembly allows the lens to be supported in a flexible manner during placement, avoiding scratches, chipping, or internal stress accumulation caused by direct collisions or compression with hard surfaces, thus protecting the lens's appearance and structural integrity. Simultaneously, the vacuum adsorption assembly creates a uniformly distributed negative pressure within the lens's bearing area, ensuring stable overall force distribution and preventing excessive localized suction that could pull, warp, or deform the lens. This ensures the lens maintains its original shape under clamping conditions, particularly meeting the stringent requirements for flatness and dimensional accuracy of optical lenses. The fixture substrate itself possesses sufficient structural rigidity to prevent deformation throughout the adsorption and clamping process, further guaranteeing stable lens positioning and accurate orientation, and preventing clamping precision issues caused by fixture deformation.

[0020] The lens bonding production line provided by the present invention is designed based on the above-mentioned lens clamping fixture. Its beneficial effects are the same as those of the lens clamping fixture, and will not be repeated here.

[0021] The automated lens clamping method provided by this invention is designed based on the above-mentioned lens clamping fixture. Its beneficial effects are the same as those of the lens clamping fixture, and will not be repeated here.

[0022] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 A cross-sectional view of a lens clamping fixture provided in an embodiment of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is an enlarged view of the mating area between the recessed structure and the sealing element in a lens clamping fixture provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a vacuum adsorption component in a lens clamping fixture provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a lens clamping fixture after it is engaged with a lens, according to an embodiment of the present invention. Figure 6 This is a schematic diagram of the structure of a lens clamping fixture when it is not engaged with a lens, according to an embodiment of the present invention. Figure 7 This is an exploded view of a lens clamping fixture in conjunction with a lens, as provided in an embodiment of the present invention. Figure 8 This is a schematic diagram of the structure of a lens clamping fixture from another angle, provided in an embodiment of the present invention; Figure label explanation: 1. Fixture base; 11. Lens bearing area; 12. Avoidance notch; 2. Sealing floating assembly; 21. Seal; 22. Floating groove; 221. Recessed structure; 2211. Axial main wall section; 2212. Upper side wall section; 2213. Lower side wall section; 3. Vacuum adsorption assembly; 31. Suction section; 32. Converging section; 33. Diverting section; 34. Adsorption channel; 35. Gas path sealing unit; 36. Gas connector; 37. Vacuum channel sealing plate; 38. Sealing plug; 4. Lens. Detailed Implementation

[0025] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific embodiments, structures, features, and effects according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0026] In the description of this invention, it should be clearly stated that the terms "first," "second," etc., in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "rear," "left," "right," "up," "down," "horizontal," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are merely for the convenience of describing this invention, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0029] Example 1 This embodiment provides a lens clamping fixture, such as Figures 1-8 As shown, the fixture includes a fixture base 1, which has a lens carrying area 11; a sealing floating component 2 is provided in the lens carrying area 11 for flexibly contacting and adaptively floating with the lens 4; a vacuum adsorption component 3 is provided inside the fixture base 1, which is connected to the lens carrying area 11 and is used to form a negative pressure in the lens carrying area 11 to adsorb and fix the lens 4.

[0030] The fixture base 1 is a rigid structure made of high-strength, high-wear-resistant stainless steel 304 or 316. It is block-shaped or plate-shaped, possessing high strength and resisting deformation during operation, thus stably supporting the lens 4. The lens-bearing area 11 is formed on the fixture base 1 and is used to place the lens 4, ensuring it is supported and positioned in a defined location. The sealing floating component 2 is arranged within the lens-bearing area 11, forming flexible contact with the lens 4 and adaptively floating according to the placement and size differences of the lens 4, preventing scratches or stress damage to the lens 4 caused by rigid contact. The vacuum adsorption component 3 is arranged inside the fixture base 1 and connected to the lens-bearing area 11. It creates a stable negative pressure in the lens-bearing area 11, using uniform adsorption force to fix the lens 4 in a predetermined position, preventing displacement or shaking of the lens 4 during transport or bonding.

[0031] During operation, the lens 4 is placed in the lens bearing area 11 and first comes into contact with the sealing floating component 2. The sealing floating component 2 adapts to the posture and size of the lens 4 to keep the lens 4 stable. Then, the vacuum adsorption component 3 forms a negative pressure in the lens bearing area 11 to stably adsorb the lens 4 and complete the clamping action.

[0032] This embodiment improves upon the shortcomings of existing lens fixtures in several ways through the coordinated operation of the fixture base 1, the sealing and floating assembly 2, and the vacuum adsorption assembly 3. Addressing the problem that existing fixtures struggle to adapt to lens size deviations, the sealing and floating assembly 2 can adaptively float when in contact with the lens 4, compensating for size differences between different lenses 4 through its flexible adjustment capability. This allows the fixture to accommodate product fluctuations within a certain range, eliminating the need for individual customization for single specifications and improving overall adaptability. Addressing the issue of traditional rigid fixtures easily damaging lenses, the sealing and floating assembly 2 ensures that the lens 4 is flexibly supported during placement, avoiding scratches, chipping, or internal stress accumulation caused by direct collisions or compression with hard surfaces, thus protecting the appearance and structural integrity of the lens 4. Simultaneously, the vacuum adsorption assembly 3 creates a uniformly distributed negative pressure within the lens-bearing area 11, ensuring stable overall force on the lens 4. This prevents excessive local suction that could pull, warp, or deform the lens, ensuring that the lens 4 maintains its original shape under clamping conditions, especially meeting the stringent requirements for flatness and shape accuracy of optical lenses. The fixture base 1 possesses sufficient structural rigidity, preventing deformation throughout the adsorption and clamping process. This further ensures stable positioning and accurate orientation of the lens 4, avoiding any impact on clamping precision due to fixture deformation. Therefore, this embodiment comprehensively addresses the technical problems of existing lens fixtures—such as inability to adapt to dimensional deviations, easy lens damage, easy lens deformation, and insufficient clamping precision—from multiple perspectives including adaptive adjustment, flexible contact, uniform force distribution, and structural stability. It better meets the requirements for high-precision, non-damaging lens clamping in automated production.

[0033] like Figure 2 As shown, the sealing floating assembly 2 includes a sealing element 21 and a floating groove 22. The floating groove 22 is recessed in the lens bearing area 11. The sealing element 21 is embedded in the floating groove 22, and the sealing element 21 can generate elastic displacement along the groove wall of the floating groove 22.

[0034] The sealing floating assembly 2 consists of a seal 21 and a floating groove 22. The floating groove 22 is recessed in the lens bearing area 11, providing installation space for the seal 21. The seal 21 is fully embedded in the floating groove 22 and can undergo axial elastic displacement under the constraint of the groove wall. This maintains assembly stability and allows the seal 21 to sink or rebound when the lens 4 is placed under pressure, achieving flexible support and adaptive adjustment. The way the seal 21 and the floating groove 22 cooperate ensures that the lens 4 is not subjected to rigid support during contact. It also compensates for dimensional deviations caused by product processing and assembly, improves the adaptability of the fixture to different batches of lenses 4, and facilitates subsequent individual replacement of the seal 21, reducing maintenance costs.

[0035] like Figure 3As shown, the wall of the floating trough 22 has a recessed structure 221 arranged radially along the seal 21. The outer wall of the seal 21 can fit against the recessed structure 221, and the seal 21 can elastically displace along the inner wall of the recessed structure 221.

[0036] The floating groove 22 has a radially extending recessed structure 221 on its groove wall. The outer wall of the seal 21 is adapted to the inner wall of the recessed structure 221, and the two can be arranged in close contact, so that the seal 21 maintains a stable movement posture during displacement and is not prone to tilting or jamming. The recessed structure 221 provides reasonable movement space for the seal 21, allowing the seal 21 to float smoothly up and down, ensuring the sealing effect while avoiding hard compression of the lens 4. Compared with the conventional flat groove structure, the recessed structure 221 makes the floating of the seal 21 more uniform and gentle, reduces local stress concentration, and further reduces the risk of the lens 4 lifting or deforming during adsorption and fixation.

[0037] The recessed structure 221 is recessed inward toward the center of the seal 21; the lower part of the recessed structure 221 is used to push the seal 21 upward so that the seal 21 and the lens form a sealed fit; the upper part of the recessed structure 221 is used to axially limit the seal 21 and restrict the seal 21 from coming out upward.

[0038] The recessed structure 221 is recessed inward toward the center of the seal 21, forming an inwardly converging contour, thereby providing the seal 21 with suitable floating space and motion guidance. The lower inner wall of the recessed structure 221 primarily exerts an upward pushing force on the seal 21, ensuring that the seal 21 maintains tight contact with the lens under the combined action of its own elasticity and the lower inner wall, guaranteeing sealing reliability during vacuum adsorption. The upper inner wall of the recessed structure 221 axially limits the seal 21, constraining its movement stroke as it floats upward, preventing the seal 21 from detaching from the floating groove 22, and ensuring the stability of the seal 21's position during long-term reciprocating floating.

[0039] In practical implementation, the aforementioned recessed structure 221 can adopt various inwardly tapering contour forms, all of which can achieve the same pushing and limiting functions, for example: The recessed structure 221 has a single arc-shaped profile. More specifically, the inner wall of the recessed structure 221 is a single, continuous, smooth arc-shaped surface, with an overall inward-convex arc shape. This arc-shaped surface transitions smoothly from top to bottom, with the lower part naturally forming an upward-lifting guiding trend, which can stably push the seal 21 upward, keeping it in contact with the lens; the upper part of the surface forms a natural narrowing structure through curvature changes, constraining the upward displacement of the seal 21 and achieving axial limiting. The use of a single arc-shaped profile simplifies processing and ensures smooth movement, avoiding corner jamming and making the elastic floating of the seal 21 more gentle and uniform.

[0040] The recessed structure 221 can also be a V-shaped profile formed by two inclined surfaces. More specifically, the inner wall of the recessed structure 221 is a V-shaped converging structure formed by the intersection of two inclined planes. The lower inclined surface forms a pushing support surface for the seal 21, providing an upward component force to the seal 21 when it is compressed, ensuring a tight seal. The upper inclined surface forms a limiting surface for the seal 21, restricting excessive upward movement of the seal 21. The V-shaped profile structure is simple, has good support rigidity, and a clear boundary between pushing and limiting, enabling reliable directional floating of the seal 21. The inner wall profile of the recessed structure 221 can be adapted to be a straight surface or a curved surface.

[0041] The recessed structure 221 can also be a trumpet-shaped profile composed of three wall segments, more specifically, such as Figure 3 As shown, the recessed structure includes an axial main wall section 2211, an upper side wall section 2212 that extends smoothly inward from the upper end of the axial main wall section 2211, and a lower side wall section 2213 that extends smoothly inward from the lower end of the axial main wall section 2211. Obtuse angle structures are formed between the axial main wall section 2211 and the upper side wall section 2212, and between the axial main wall section 2211 and the lower side wall section 2213. The inner wall contour of the recessed structure 221 can be set as a straight surface or a curved surface, which can provide smooth displacement guidance for the seal 21, avoid corner jamming, make the seal 21 move more smoothly when floating under pressure, and ensure that the seal 21 always fits against the wall surface, improving sealing reliability. It also makes the seal 21 more evenly stressed during vertical floating, extending its service life.

[0042] It is understood that this embodiment only lists three typical structures: single arc shape, V shape, and trumpet shape. However, the recessed structure of this application is not limited to the above three specific forms. Any contour structure that can achieve inward convergence towards the center of the seal, push the seal upward from the bottom to achieve sealing and fit, and axially limit the seal from the top, regardless of how many wall sections it consists of or whether it uses straight or curved transitions, should be included within the protection scope of this application.

[0043] The sealing element 21 is an annular sealing element; the annular sealing element is an O-ring or a non-circular O-ring, and the top of the sealing element 21 protrudes from the surface of the lens bearing area 11.

[0044] Irregularly shaped O-rings are a type of annular seal relative to standard O-rings. Standard O-rings have a perfectly circular cross-section; while irregularly shaped O-rings, although still forming a closed ring, have a special non-circular profile (such as X-shaped, star-shaped, rectangular, D-shaped, or with a raised lip / stepped shape), specifically designed for unique operating conditions such as installation space, floating requirements, sealing pressure, and contact methods. Their core features are: retaining the overall annular structure and adapting to conventional annular mounting grooves, but with an optimized cross-sectional profile. Compared to standard O-rings, they offer more stable floating, more uniform contact pressure, and stronger resistance to extrusion / torsion, making them more suitable for flexible support and sealing applications of precision optical lenses.

[0045] The seal 21 adopts a ring structure, using an O-ring or a non-circular O-ring, made of flexible rubber or silicone, with a hardness controlled within the Shore A range of 50 to 70, providing both suitable elasticity and support. The surface of the seal 21 is smoothed, with a surface roughness not exceeding Ra 0.8 μm, which reduces friction when in contact with the lens 4 and prevents scratches on the lens surface.

[0046] The top of the seal 21 is slightly higher than the surface of the lens-bearing area 11, allowing the lens 4 to preferentially contact the seal 21 during placement, forming a flexible buffer. The outer diameter of the seal 21 and the inner diameter of the floating groove 22 are interference-fitted, with the interference amount controlled between 0.1mm and 0.2mm. This ensures that the seal 21 is firmly assembled and not easily dislodged, while also allowing it to undergo axial elastic displacement under stress, achieving self-adaptive floating. Through the above configuration, the seal 21 can provide reliable sealing while providing flexible support for the lens 4, avoiding rigid collisions, and can accommodate dimensional deviations of the lens 4, improving the problem of traditional overmolded fixtures pulling the lens due to cooling deformation.

[0047] Furthermore, O-rings or irregularly shaped O-rings can be individually disassembled and quickly replaced without removing the fixture base 1, simplifying maintenance and reducing time consumption. The material of the sealing element 21 can be selected from nitrile rubber, fluororubber, medical-grade silicone rubber, or polyurethane, etc., to adapt to the contact requirements of lenses made of different materials such as optical glass and resin, while meeting the requirements of wear resistance, sealing performance, and biocompatibility under different working conditions. Depending on the specifications and shape (round, square, irregular) of the lens 4, O-rings or irregularly shaped O-rings of different sizes and cross-sectional shapes can be replaced without replacing the entire fixture base 1, significantly improving the versatility of the fixture and reducing maintenance costs and equipment downtime.

[0048] like Figure 2As shown, the sealing element 21 is configured as two layers, and the two layers of sealing element 21 are arranged vertically in the axial direction to form a positional difference, and each layer of sealing element 21 has a corresponding floating groove 22.

[0049] The sealing element 21 is configured as an inner and outer layer, with both layers arranged concentrically in a ring within the lens-bearing area 11. Each layer corresponds to an independent floating groove 22, allowing for independent elastic floating. The double-layer sealing element 21 forms a double sealing barrier, significantly improving the sealing effect during vacuum adsorption, reducing the risk of leakage, and maintaining a more stable negative pressure. The vertical arrangement of the double-layer sealing element 21 further enhances sealing reliability and negative pressure stability, while better adapting to the placement posture of lenses of different sizes and thicknesses, resulting in more uniform stress on the lens, reducing the risk of local deformation, and expanding the applicability range of the fixture.

[0050] In addition, a plurality of clearance recesses 12 are uniformly arranged circumferentially around the fixture base position corresponding to the outer periphery of the outer sealing component. The clearance recesses 12 are used to form clearance space for non-circular or irregularly shaped lenses 4, to avoid rigid interference between the lower edge of the lens 4 and the fixture base, and to ensure that the lens 4 is placed stably and fits reliably.

[0051] like Figure 4 As shown, the vacuum adsorption assembly includes a suction section 31, a collection section 32, a diversion section 33, and an adsorption channel 34 connected in sequence. The suction section 31 extends to the outer wall of the fixture base 1. The collection section 32 is a continuous annular groove arranged circumferentially. The diversion section 33 is a multi-segment independent groove evenly distributed circumferentially. One end of the diversion section 33 is connected to the collection section 32, and the other end is connected to the adsorption channel 34. The adsorption channel 34 is a continuous annular groove arranged circumferentially and is located below the lens bearing area 11. The circumferential direction refers to the circumferential direction of the lens bearing area 11.

[0052] The vacuum adsorption component 3 adopts a multi-stage airflow structure. External negative pressure airflow is introduced into the fixture substrate 1 through the intake section 31, first entering the circumferentially enclosed collection section 32. The collection section 32 is a continuous annular cavity that gathers, fills, and stabilizes the airflow entering from one side of the intake section 31, ensuring consistent airflow pressure throughout the circumferential range. This avoids the problem of excessive suction near the intake end and insufficient suction at the far end due to a biased intake position, eliminating the root cause of uneven airflow distribution. After being fully stabilized by the collection section 32, the airflow continues into multiple circumferentially evenly arranged diversion sections 33. Each diversion section 33 is independent and evenly spaced, distributing the total airflow evenly to various circumferential positions. This ensures that the airflow rate, airflow velocity, and negative pressure of each diversion path remain essentially consistent, further guaranteeing a balanced and stable adsorption force acting on the lens 4 circumferentially, preventing excessively strong or weak localized suction. Finally, the airflow converges into the adsorption channel 34, which is also arranged in a continuous ring, through each diversion section 33. The adsorption channel 34 is located below the lens bearing area 11, and can directly apply the evenly distributed negative pressure to the entire outer periphery of the lens 4.

[0053] This embodiment, through its air path arrangement of first stabilizing the pressure, then evenly distributing the airflow, and finally performing annular adsorption, can effectively avoid problems such as force shift, lens tilting, and edge warping caused by the traditional direct-connection air path directly directing the airflow to a local area of ​​the lens. This ensures that the lens 4 remains naturally flat during the adsorption process and will not generate internal stress or deformation due to uneven adsorption force. It is especially suitable for lens clamping and bonding scenarios with extremely high requirements for flatness and optical precision.

[0054] like Figure 2 As shown, the vacuum adsorption assembly 3 also includes an air path sealing unit 35, which includes two layers of sealing rings arranged axially at intervals. Both layers of sealing rings are located at the mating position between the air intake section 31 and the fixture base 1.

[0055] The gas path sealing unit 35 employs two layers of sealing rings arranged axially at intervals, forming a double-sealing structure at the assembly position between the suction section 31 and the fixture base 1. This effectively prevents external air from entering the gas path, avoiding negative pressure leakage and ensuring that the vacuum adsorption assembly 3 can establish a stable adsorption pressure. The two layers of sealing rings work together to improve the sealing performance and reliability of the gas path during long-term operation. Even if one layer experiences slight wear, the other layer can still maintain its sealing effect, reducing the probability of leakage failure and making the entire vacuum adsorption system operate more stably.

[0056] like Figure 8As shown, the vacuum adsorption assembly 3 also includes an air connector 36, a vacuum channel sealing plate 37, and a sealing plug 38; the air connector 36 is installed at the outer end of the suction section 31, the vacuum channel sealing plate 37 covers the fixture base 1 and closes the openings of the summing section 32 and the diversion section 33, and the sealing plug 38 seals the gas path process hole of the fixture base 1.

[0057] The air connector 36 is installed at the outer end of the suction section 31 for quick connection to the external negative pressure pipeline, which is easy to assemble and has a reliable seal. The vacuum channel sealing plate 37 covers the fixture base 1, sealing the processing openings of the converging section 32 and the diverting section 33, forming a closed channel in the internal air passage to ensure directional airflow. The sealing plug 38 seals the process hole formed by the air passage processing in the fixture base 1 to prevent airflow leakage from the process hole, further improving the overall sealing of the air passage. The above structures together constitute a complete and closed vacuum passage, ensuring that the negative pressure can be stably and efficiently transmitted to the adsorption channel 34, providing a uniform and reliable adsorption and fixation effect for the lens 4. The vacuum adsorption assembly 3 in this embodiment has a stable overall layout and reliable sealing, and can be used with the automated linkage assembly to achieve seamless linkage with the multi-axis robotic arm, ensuring the continuity and consistency of negative pressure adsorption. Actual operation has verified that this air passage structure can maintain long-term stable adsorption without the adsorption force decreasing due to leakage, and at the same time provides a reliable air passage foundation for subsequent automated detection and linkage control.

[0058] In a specific embodiment, the fixture base 1 is further provided with a positioning detection sensor and a clamping assembly. The positioning detection sensor is used to detect the placement position of the lens, and the clamping assembly includes a stepper drive mechanism and a clamping block. The clamping assembly is used to perform a clamping action on the lens.

[0059] The fixture base 1 integrates a positioning detection sensor and a clamping assembly. The positioning detection sensor can detect in real time whether the lens 4 is placed in the correct position and whether its posture meets the requirements, providing signal basis for automated control. The clamping assembly consists of a stepper drive mechanism and a clamping block. The stepper drive mechanism can output precise driving force to drive the clamping block to perform auxiliary clamping action on the lens 4. The clamping force is controllable. Combined with the flexible support of the sealing floating assembly 2 and the uniform adsorption of the vacuum adsorption assembly 3, the positioning stability of the lens 4 during movement can be further improved, avoiding displacement. It is suitable for use in automated equipment such as six-axis robotic arms to achieve high-precision and automated lens clamping and bonding operations.

[0060] Example 2 This embodiment provides a lens bonding production line, including a six-axis robotic arm, a negative pressure system, a linkage controller, and the lens clamping fixture described in Embodiment 1. The six-axis robotic arm is connected to the lens clamping fixture via a connecting part, and the negative pressure system is connected to the inlet of the vacuum adsorption component 3.

[0061] In this embodiment, the automated linkage component can precisely link with the dual six-axis robotic arm and the inspection mechanism, supporting preset parameters for multiple lens specifications. This enables fully automated processes including fixture adjustment, lens loading, positioning, clamping, bonding, unloading, and O-ring wear detection, requiring no manual assistance. Through multi-component collaborative control, this production line can achieve high-precision positioning of two lenses, with a positioning error of no more than ±0.005mm, meeting the automated assembly and bonding requirements of AR glasses optical lenses. The lens clamping fixture used in this embodiment achieves an actual positioning accuracy error of ±0.008mm, fully meeting the stringent requirements of AR glasses lens assembly.

[0062] The six-axis robotic arm, as an automated actuator, is fixedly connected to the lens clamping fixture via a connecting part. This connecting part is made of high-strength metal and is bolted to both the fixture base 1 and the six-axis robotic arm, ensuring a secure and rigid connection that will not loosen or deform during transport. This guarantees the stability of the lens clamping fixture and prevents lens 4 from shifting or falling due to loose connections. The six-axis robotic arm possesses multi-degree-of-freedom motion capabilities, allowing for flexible adjustment of the lens clamping fixture's position and orientation to adapt to lens bonding requirements at different angles and positions, achieving precise transport and bonding.

[0063] The negative pressure system is connected to the suction section 31 of the vacuum adsorption component 3, providing a stable negative pressure source for the vacuum adsorption component 3. The negative pressure can be precisely adjusted through the negative pressure system to adapt to the adsorption needs of lenses 4 of different specifications and materials, avoiding excessive negative pressure that could deform the lens 4, or insufficient negative pressure that could lead to unstable adsorption. The negative pressure system is electrically connected to the linkage controller, which can start and stop according to the instructions of the linkage controller to realize the automated control of the adsorption action, and coordinate with the lens placement and pressing actions. As the control core of the entire production line, the linkage controller is electrically connected to the six-axis robotic arm, the negative pressure system, the positioning detection sensors on the lens clamping fixture, and the pressing component, realizing the coordinated linkage control of each component. The linkage controller can receive detection signals from the positioning detection sensor. When it detects that the lens 4 is placed in place and the posture is qualified, it controls the negative pressure system to start, so that the vacuum adsorption component 3 forms a negative pressure in the lens bearing area 11 to complete the adsorption and fixation. Then, it controls the pressing component to press the lens 4. Finally, it controls the six-axis robotic arm to drive the lens clamping fixture to the bonding station to complete the lens bonding operation. The whole process is highly automated, requires no manual intervention, greatly improves production efficiency, and ensures bonding accuracy.

[0064] This production line, through the coordinated operation of its various components, fully leverages the high precision, non-destructive, and adaptive clamping advantages of the lens clamping fixture. It solves the problems of low efficiency, poor bonding accuracy, and easy damage to lenses caused by manual clamping in traditional production lines. At the same time, relying on the flexible movement of the six-axis robotic arm and the precise control of the linkage controller, it realizes automated and standardized lens bonding operations, adapting to the needs of large-scale, high-precision lens production, and is especially suitable for automated bonding scenarios of optical lenses.

[0065] Practical operation has verified that this production line effectively improves lens assembly quality and efficiency: the lens assembly qualification rate increases from 95% with traditional manual clamping to 99.8%, completely avoiding surface scratches, contamination, or excessive bonding gaps; the fixture body has a service life of up to 6 years, and the O-ring replacement cycle is every 2 months, with a single replacement cost of only 8% of that of traditional overmolding fixtures; the fixture manufacturing cycle is shortened to 3 days, and the overall manufacturing cost is reduced by 55% compared to traditional overmolding fixtures. This fixture can be adapted to the automated assembly of 3-5 different models of AR glasses lenses, demonstrating strong versatility. It works smoothly with dual six-axis robotic arms, increasing the assembly cycle by more than 35%, requiring no manual intervention, and fully meeting the needs of high-frequency automated assembly. Simultaneously, the O-ring wear status can be detected and monitored in real time via automated detection, preventing assembly quality from being affected by seal failure and ensuring continuous and stable operation of the six-axis robotic arms.

[0066] Example 3 This embodiment provides an automated lens clamping method, applied to the lens clamping fixture described in Embodiment 1, comprising: placing a lens 4 in the lens bearing area 11, so that the lens 4 flexibly contacts the sealing floating component 2 and achieves adaptive floating; and forming a negative pressure in the lens bearing area 11 by the vacuum adsorption component 3 to adsorb and fix the lens 4.

[0067] In the specific implementation process, the lens 4 is first precisely placed in the lens bearing area 11 of the fixture base 1 using an automated feeding mechanism (or a six-axis robotic arm-assisted feeding). During the descent of the lens 4, it first contacts the sealing floating component 2. Due to the flexibility and adaptive floating capability of the sealing floating component 2, it will not have a rigid collision with the lens 4, effectively preventing scratches and chipping on the surface of the lens 4. After the lens 4 is placed, its own weight acts on the sealing floating component 2, causing the sealing floating component 2 to generate elastic displacement along its own structural constraints, achieving adaptive floating and automatically compensating for the size deviation and placement posture deviation of the lens 4. This allows the lens 4 to naturally and flatly conform to the lens bearing area 11, preventing localized stress concentration due to size deviations.

[0068] Once the lens 4 is in full contact with the sealing floating assembly 2 and its posture is stable, the vacuum adsorption assembly 3 initiates the negative pressure adsorption action. The external negative pressure system inputs negative pressure airflow into the vacuum adsorption assembly 3 through the suction section 31. After the airflow is collected and stabilized by the collection section 32 and evenly distributed by the diversion section 33, a uniform negative pressure is formed below the lens bearing area 11 by the adsorption channel 34. The lens 4 is stably adsorbed and fixed on the lens bearing area 11 by the negative pressure suction. Throughout the adsorption process, the negative pressure suction acts evenly on the lens 4, preventing excessive local suction and avoiding edge warping or deformation of the lens 4. At the same time, the sealing floating assembly 2 always maintains flexible contact with the lens 4, further buffering the stress brought by the adsorption force and protecting the optical performance of the lens 4.

[0069] This method is simple and highly automated, requiring no manual intervention, and can quickly clamp and fix the lens 4. It also solves the problems of traditional clamping methods, such as inability to adapt to size deviations, easy damage to the lens, and insufficient clamping accuracy.

[0070] In a specific embodiment, when the lens 4 is placed in the lens bearing area 11, the lens presses against the seal 21, causing the seal 21 to undergo elastic displacement along the inner wall of the recessed structure 221, so as to adapt to the size deviation of the lens.

[0071] After the lens 4 is placed, its own weight acts on the flexible rubber or silicone seal 21, causing it to elastically displace along the smooth wall of the recessed structure 221. The recessed structure 221 provides smooth guidance, preventing skewing and jamming. When the lens 4 has dimensional deviations such as thickness or contour, the seal 21 can adaptively compensate through elastic displacement, and its 0.1-0.2mm interference fit with the floating groove 22 ensures firm assembly and smooth displacement. This design can effectively adapt to dimensional fluctuations in mass production of the lens 4, improve the versatility of the fixture, avoid localized stress and internal stress, protect the appearance and optical performance of the lens 4, and align with the inventor's design concept.

[0072] In practice, after the lens 4 is placed in the lens bearing area 11, its own weight acts on the seal 21. Since the seal 21 is made of flexible rubber or silicone, it has good elasticity and is embedded in the floating groove 22 with the recessed structure 221. Under the pressure of the lens 4, the seal 21 will elastically displace along the inner wall of the recessed structure 221. The axial main wall section 2211, the upper side wall section 2212, and the lower side wall section 2213 of the recessed structure 221 form a smooth inclined wall surface, which provides smooth guidance for the displacement of the seal 21, allowing the seal 21 to float up and down along the axial direction without tilting or jamming. When there are dimensional deviations in the lens 4 (such as thickness deviations or edge contour deviations), the elastic displacement of the seal 21 can achieve adaptive compensation: if the thickness of the lens 4 is too large, it will exert a large resistance force on the seal 21, causing the seal 21 to move downward along the inner wall of the recessed structure 221 until the lens 4 and the lens bearing area 11 form a reasonable fit; if the thickness of the lens 4 is too small, the resistance force on the seal 21 will decrease, and it will rebound upward by its own elasticity, always maintaining close contact with the lens 4 to achieve flexible support. At the same time, the outer diameter of the seal 21 and the inner diameter of the floating groove 22 adopt an interference fit of 0.1 to 0.2 mm, which not only ensures that the seal 21 will not fall out of the groove due to excessive displacement, but also ensures the smoothness of displacement, further improving the reliability of adaptive adjustment.

[0073] In a specific embodiment, after the lens 4 is placed in place, the positioning detection sensor detects the positioning status, and the linkage controller controls the clamping component to clamp and position the lens 4 according to the positioning qualified signal.

[0074] After the lens 4 is placed in the lens bearing area 11, presses against the seal 21 and causes it to elastically displace and complete the adaptive adjustment, the positioning detection sensor on the fixture base 1 immediately starts detection to comprehensively detect the placement position and posture of the lens 4. The detection content includes whether the lens 4 is centered, whether it is tilted, and whether it is completely in contact with the seal 21. The detection signal is transmitted to the linkage controller in real time.

[0075] After receiving the signal from the positioning detection sensor, the linkage controller judges the detection result: if the lens 4 is detected to be in place and in the correct posture (i.e., a positioning pass signal), the linkage controller immediately issues a control command to start the clamping assembly; upon receiving the command, the stepper drive mechanism of the clamping assembly outputs a precise and controllable driving force, causing the clamping block to move slowly until it makes flexible contact with the surface of the lens 4, and applies a preset clamping force to assist in clamping and positioning the lens 4. The clamping force is preset according to the material and thickness of the lens 4, and is strictly controlled within a range that will not cause deformation of the lens 4, while ensuring that the displacement of the lens 4 is effectively limited to prevent the lens 4 from shifting or shaking during subsequent transportation and bonding. If the positioning detection sensor detects that the lens 4 is misplaced or in the wrong posture, the linkage controller will not issue a clamping command, but will issue an alarm signal to remind the staff to adjust the position of the lens 4, or to automatically adjust the posture of the lens 4 through a six-axis robotic arm until the positioning is qualified, before performing subsequent clamping and adsorption actions.

[0076] This method ensures accurate positioning of lens 4 through precise detection by positioning sensors and coordinated control by linkage controllers. Further enhanced clamping stability is achieved through the auxiliary clamping of the clamping assembly. This, combined with the flexible support of the sealing floating assembly 2 and the uniform adsorption of the vacuum adsorption assembly 3, works synergistically to achieve high-precision, damage-free clamping of lens 4 from four aspects: positioning, support, adsorption, and clamping. This solves the problems of inaccurate positioning and unstable clamping in traditional clamping methods, meeting the stringent requirements of automated production lines for lens clamping accuracy and stability, and ensuring the precision and quality of subsequent lens bonding operations.

[0077] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A lens clamping fixture, characterized in that, The fixture includes a fixture base having a lens-bearing area; a sealing floating component is provided in the lens-bearing area for flexible contact with the lens and adaptive floating; a vacuum adsorption component is provided inside the fixture base, which is connected to the lens-bearing area and is used to form a negative pressure in the lens-bearing area to adsorb and fix the lens.

2. The lens clamping fixture according to claim 1, characterized in that, The sealing floating assembly includes a seal and a floating groove. The floating groove is recessed in the lens bearing area, the seal is embedded in the floating groove, and the seal can elastically displace along the groove wall of the floating groove.

3. The lens clamping fixture according to claim 2, characterized in that, The wall of the floating tank has a recessed structure arranged radially along the seal. The outer wall of the seal can fit into the recessed structure, and the seal can elastically displace along the inner wall of the recessed structure.

4. The lens clamping fixture according to claim 3, characterized in that, The recessed structure is recessed inward toward the center of the seal; the lower part of the recessed structure is used to push the seal upward so that the seal and the lens form a sealed fit; the upper part of the recessed structure is used to axially limit the seal and prevent the seal from coming out upward.

5. The lens clamping fixture according to claim 4, characterized in that, The sealing element is an annular sealing element; the annular sealing element is an O-ring or a non-circular O-ring, and the top of the sealing element protrudes from the surface of the lens bearing area.

6. The lens clamping fixture according to claim 5, characterized in that, The sealing element is configured as two layers, and the two layers of the sealing element are arranged vertically in the axial direction to form a positional difference, and each layer of the sealing element has a corresponding floating groove.

7. The lens clamping fixture according to claim 1, characterized in that, The vacuum adsorption assembly includes a suction section, a collection section, a diversion section, and an adsorption channel connected in sequence. The suction section extends to the outer wall of the fixture substrate. The collection section is a continuous annular groove arranged circumferentially. The diversion section is a multi-segment independent groove evenly distributed circumferentially. One end of the diversion section is connected to the collection section, and the other end is connected to the adsorption channel. The adsorption channel is a continuous annular groove arranged circumferentially and is located below the lens-bearing area. The circumferential direction refers to the circumferential direction of the lens-bearing area.

8. The lens clamping fixture according to claim 7, characterized in that, The vacuum adsorption assembly also includes a gas path sealing unit, which includes two layers of sealing rings arranged axially at intervals. Both layers of sealing rings are located at the mating position between the air intake section and the fixture base.

9. The lens clamping fixture according to claim 7, characterized in that, The vacuum adsorption assembly also includes an air connector, a vacuum channel sealing plate, and a sealing plug; the air connector is installed at the outer end of the suction section, the vacuum channel sealing plate covers the fixture base and seals the openings of the collection section and the diversion section, and the sealing plug seals the gas path process hole of the fixture base.

10. The lens clamping fixture according to claim 1, characterized in that, The fixture base is also provided with a positioning detection sensor and a clamping assembly. The positioning detection sensor is used to detect the placement position of the lens, and the clamping assembly includes a stepper drive mechanism and a clamping block. The clamping assembly is used to perform a clamping action on the lens.

11. A lens bonding production line, characterized in that, The device includes a six-axis robotic arm, a negative pressure system, a linkage controller, and a lens clamping fixture as described in any one of claims 110. The six-axis robotic arm is connected to the lens clamping fixture via a connecting part, and the negative pressure system is connected to the inlet of the vacuum adsorption assembly.

12. An automated lens clamping method, applied to the lens clamping fixture according to any one of claims 1 to 10, characterized in that, include: The lens is placed in the lens-bearing area, allowing the lens to flexibly contact the sealed floating component and achieve adaptive floating; the lens is then adsorbed and fixed in place by the vacuum adsorption component to create negative pressure in the lens-bearing area.

13. The automated lens clamping method according to claim 12, characterized in that, When the lens is placed in the lens bearing area, the lens presses against the seal, causing the seal to elastically displace along the inner wall of the recessed structure to adapt to the size deviation of the lens.

14. The automated lens clamping method according to claim 13, characterized in that, After the lens is placed in position, the positioning detection sensor detects the positioning status, and the linkage controller controls the clamping component to clamp and position the lens according to the positioning qualified signal.

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