Full-automatic true circle detection, classification and storage device for optical lenses

Abstract

The application discloses a kind of full-automatic true circle detection classification storage devices of optical lens, it is related to optical lens detection sorting equipment technical field, including installation cabinet, rotary distribution mechanism is rotationally arranged on the installation cabinet, the rotary distribution mechanism includes distribution circular table, the distribution circular table is circumferentially equipped with several distribution chutes, each distribution chute is correspondingly configured with lens fixing mechanism and lens push mechanism, the first power mechanism for driving distribution circular table rotation is arranged in the installation cabinet, load-bearing platform is arranged on the installation cabinet, and the loading mechanism is installed on the load-bearing platform.The application sets up rotary distribution mechanism, during the rotation of distribution circular table, loading mechanism, vision detection unit and lens push mechanism can synchronously carry out loading, detection, push and unload multiple processes, without waiting for the complete process of single lens to execute next process, multiple processes are parallel to effectively shorten the whole machine operation tempo, and improve the processing capacity of optical lens batch detection sorting.

Description

Technical Field

[0001] This invention relates to the field of optical lens inspection and sorting equipment, specifically to a fully automated device for inspecting, classifying, and storing perfectly round optical lenses. Background Technology

[0002] Optical lenses are transparent optical elements made of glass or resin optical materials, and are widely used in camera lenses, optical instruments, optoelectronic equipment and other fields. The roundness of the outer circle of the lens is an important geometric indicator. Roundness testing is to measure and evaluate the roundness error of the outer edge contour of the optical lens. If the roundness of the lens is not up to standard, it will directly cause assembly misalignment, imaging distortion and reduce the performance of the entire optical system.

[0003] In the mass production of optical lenses, after grinding and polishing, the lenses need to be tested for roundness and then sorted and collected based on the test results. Existing automated testing and sorting equipment uses a single-station serial operation mode, where loading, testing, and unloading are performed sequentially, preventing parallel processing and limiting production cycle time. Another type of rotary testing equipment generally relies on encoders to obtain the rotary table angle for station positioning, resulting in high hardware costs. Furthermore, the lens release action often uses simple air-blowing or mechanical pushing, which can easily lead to lenses failing to detach or being damaged by impacts.

[0004] Furthermore, most existing similar equipment can only achieve binary classification of qualified and unqualified, making it difficult to easily expand to achieve multi-level sub-sorting. Some equipment requires additional independent linear drive components to achieve lens detection position feeding, increasing the number of parts in the whole machine and increasing the complexity of equipment control and the probability of failure. Therefore, developing a fully automatic true roundness detection, sorting and storage device for optical lenses with a high degree of automation, reliable station positioning, parallel processing capabilities, and easy expansion to multi-level classification is a practical production need.

[0005] Therefore, it is necessary to propose a fully automated device for detecting, classifying, and storing perfectly round optical lenses to solve the above problems. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] The purpose of this invention is to provide a fully automated true roundness detection, sorting and storage device for optical lenses, so as to solve the problems mentioned in the background art, which require true roundness detection and sorting of existing lenses after processing, resulting in low equipment efficiency, high cost and poor scalability.

[0008] (II) Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solution: an automatic true roundness detection, sorting and storage device for optical lenses, including a mounting cabinet, on which a rotating material distribution mechanism is rotatably arranged, the rotating material distribution mechanism including a material distribution platform, the material distribution platform being provided with a plurality of material distribution slides in a circumferential manner, each of the material distribution slides being configured with a lens fixing mechanism and a lens pushing mechanism, and a first power mechanism for driving the material distribution platform to rotate is provided inside the mounting cabinet; The mounting cabinet is equipped with a support platform, on which a feeding mechanism is installed. The feeding mechanism includes sensors and signal reflectors corresponding to the dispensing chutes. The support platform has an annular shaped guide rail groove, with the lens fixing mechanism slidingly engaging with it. The lens fixing mechanism includes a negative pressure adsorption component and a valve that can be mechanically squeezed to open or close the air passage. The lens pushing mechanism includes a telescopic unit and a pusher assembly. The mounting cabinet has a second power mechanism to drive the telescopic unit to rotate circumferentially. The mounting cabinet also includes a vision inspection unit and at least two sets of conveyor belt units. The shaped guide rail groove has an outwardly protruding section corresponding to the vision inspection unit, used to drive the lens fixing mechanism to extend or retract the lens onto the dispensing chutes.

[0009] By adopting the above technical solution, the negative pressure cutting and the mechanical pushing of the lens are executed synchronously. The reset spring can realize the automatic return of the top rod, avoiding the lens from being squeezed and broken due to the forced pushing before the negative pressure is released, and the unloading action is reliable.

[0010] The present invention is further configured such that: the sensor cooperates with the signal reflector to realize the detection of the workstation position, the signal reflector rotates synchronously with the material distribution table, and each material distribution slide corresponds to a unique signal reflector.

[0011] By adopting the above technical solution, non-contact photoelectric positioning of the turntable station can be achieved, which can accurately identify the loading and positioning status of the material distribution slide, avoid the wear problem caused by mechanical contact positioning, and ensure the consistency of the loading position each time.

[0012] The present invention is further configured such that: the first power mechanism includes a first servo motor, a gearbox, an output spur gear, and a gear ring; the gear ring is fixedly connected to a rotating ring at the bottom of the material distribution platform, the output end of the first servo motor is connected to the input end of the gearbox, the output end of the gearbox is equipped with an output spur gear, and the output spur gear meshes with the gear ring for transmission.

[0013] By adopting the above technical solutions, the gear meshing transmission outputs large torque and the transmission is smooth. The gearbox plays a role in deceleration and torque increase, ensuring smooth start and stop of the material distribution table and improving the position control accuracy of the turntable rotation.

[0014] The present invention is further configured such that: the lens fixing mechanism includes a main slider, a push-pull block, a linkage pin, and a suction cup; the material distribution slide is provided with an installation sliding hole, and the main slider is slidably assembled inside the installation sliding hole; the push-pull block is connected to the outside of the main slider, the lower end of the push-pull block is fixed with a linkage pin, and the linkage pin is slidably engaged in the irregular guide rail groove.

[0015] By adopting the above technical solution, the rotary motion of the material distribution table is converted into the radial linear motion of the main slider through the sliding cooperation of the linkage pin and the irregular guide groove. The mechanical follow-up does not require additional electrical control, simplifying the overall machine control logic.

[0016] The present invention is further configured such that: the suction cup is disposed at the top of the main slider, and the suction cup is connected to a negative pressure pump to form a negative pressure adsorption assembly.

[0017] By adopting the above technical solution, optical lenses are fixed by negative pressure adsorption, which provides gentle contact and effectively reduces the risk of scratches and chipping on the lens surface, ensuring stable clamping during lens transportation.

[0018] The present invention is further configured such that: the valve is a normally open pressure valve, and a wedge is fixedly provided at the top end of the valve stem; the push block assembly includes a second push block, and the second push block is provided with an inclined surface adapted to the wedge block.

[0019] By adopting the above technical solution, the mechanical opening and closing of the valve is achieved by relying on the inclined extrusion wedge, which can be synchronized with the pushing action, eliminating the need for a separate air circuit control solenoid valve and reducing the cost of air circuit hardware.

[0020] The present invention is further configured such that: the push block assembly further includes a first push block; the lens pushing mechanism further includes a push rod, a limiting slider, a reset spring, and a passive plate; the material distribution slide is provided with an installation groove; the push rod is slidably disposed in the installation groove; the limiting slider is fixedly connected to the middle of the push rod; the limiting slider abuts against the wall of the installation groove with a reset spring; and the passive plate is fixed to the inner end of the push rod.

[0021] By adopting the above technical solution, the negative pressure cutting and the mechanical pushing of the lens are executed synchronously. The reset spring can realize the automatic return of the top rod, avoiding the lens from being squeezed and broken due to the forced pushing before the negative pressure is released, and the unloading action is reliable.

[0022] The present invention is further configured such that: the second power mechanism includes a second servo motor and a fixed plate; the second servo motor is fixedly arranged inside the mounting box, the output shaft of the second servo motor extends upward along the central axis of the material distribution frustum to the bearing platform, the end of the output shaft is fixed to the fixed plate, and the telescopic unit is fixedly installed on the fixed plate.

[0023] By adopting the above technical solution, the telescopic unit can be driven by the second servo motor at the axis to switch the workstation circumferentially. Only one set of pushing mechanism can be used to adapt to multiple sorting workstations, reducing the number of actuators and simplifying the overall structure.

[0024] The present invention is further configured such that: the feeding mechanism includes a feeding plate, a storage bin, and a sub-feeding unit; the feeding plate is fixed on the support platform by a support leg, and the curvature of the end of the feeding plate matches the curvature of the inner circle of the material distribution frustum; the storage bin is installed above the feeding plate, and a discharge channel is opened at the bottom of the storage bin; the sub-feeding unit includes a third servo motor, a threaded rod, an internal threaded block, and a push rod, the push rod being movably disposed in the feeding channel, and the height of the push rod being higher than the bottom surface of the feeding channel and lower than the thickness of the lens.

[0025] By adopting the above technical solution, the threaded drive achieves stable reciprocating feeding, and can feed the lens into the distribution slide piece by piece. The curvature of the feeding plate matches the contour of the turntable, ensuring a smooth transition of lens feeding and preventing jamming.

[0026] The present invention is further configured such that: the conveyor belt unit includes a first conveyor belt unit and a second conveyor belt unit; the first conveyor belt unit is connected to the finished product collection area, and the second conveyor belt unit is connected to the defective product collection area; a limiting block is also provided at the top of the mounting cabinet, and the limiting block is arranged on the side of the loading station.

[0027] By adopting the above technical solution, qualified lenses and defective lenses can be automatically separated and collected. The limiting block can limit the position of the lenses during the feeding process, prevent the lenses from tilting or misaligning, and improve the feeding success rate.

[0028] (III) Beneficial Effects Compared with the prior art, the present invention provides a fully automated device for detecting, classifying, and storing perfectly round optical lenses, which has the following advantages: 1. The present invention is equipped with a rotating material distribution mechanism. During the rotation of the material distribution platform, the feeding mechanism, vision inspection unit and lens pushing mechanism can simultaneously carry out multiple processes such as feeding, inspection and pushing unloading. It is not necessary to wait for the complete process of a single lens to be completed before executing the next process. The parallel operation of multiple processes effectively shortens the overall machine operation cycle and improves the processing capacity of batch inspection and sorting of optical lenses.

[0029] 2. This invention relies on the combination of mechanical servo and photoelectric positioning to reduce driving components and ensure high equipment reliability. On the one hand, the irregular guide rail groove and linkage pin constitute a servo cam slider mechanism, which automatically drives the suction cup and lens to extend / retract during the revolution of the material distribution table, without the need for additional linear drive components to complete the lens feeding. On the other hand, it relies on sensors and signal reflectors to achieve non-contact positioning of the turntable station, which does not rely on high-precision angle encoders, simplifies the overall control logic, reduces hardware costs, and reduces the number of failure points of moving parts.

[0030] 3. The present invention features a linkage between negative pressure cutting and mechanical pushing, ensuring reliable material discharge and strong scalability. When the lens pushing mechanism is in operation, the second pusher blocks squeeze the wedge blocks to cut off the valve air circuit and release the negative pressure. At the same time, the first pusher blocks push the top rod to push the lens down. The release of negative pressure and mechanical pushing are carried out synchronously, avoiding the lens from failing to fall off or flying around and colliding. Furthermore, relying on only one lens pushing mechanism, in conjunction with the second power mechanism to switch the pushing position, and by adding a material distribution slide and a corresponding conveyor belt unit, multi-level classification and storage of lenses can be achieved, resulting in low expansion and modification costs. Attached Figure Description

[0031] Figure 1 This is a three-dimensional schematic diagram of the fully automated true roundness detection, sorting and storage device for optical lenses of the present invention; Figure 2 This is a top view schematic diagram of the fully automated true roundness detection, sorting and storage device for optical lenses of the present invention; Figure 3 This is a cross-sectional schematic diagram of the fully automated true roundness detection, sorting and storage device for optical lenses of the present invention; Figure 4 This is a cross-sectional schematic diagram of the feeding mechanism of the present invention; Figure 5 This is a cross-sectional schematic diagram of the material distribution frustum of the present invention; Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the lens fixing mechanism at point A; Figure 7 This is a cross-sectional schematic diagram of the lens pushing mechanism of the present invention; Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the lens pushing mechanism at point B.

[0032] In the diagram: 1. Lens; 10. Mounting cabinet; 11. Support platform; 12. Mounting box; 13. Bearing platform; 14. First conveyor belt unit; 15. Second conveyor belt unit; 16. Vision inspection unit; 17. Limiting block; 20. Rotary material distribution mechanism; 21. Material distribution frustum; 22. Material distribution slide; 23. Rotating ring; 24. Auxiliary roller; 25. Side stop block; 26. Mounting slide hole; 27. Mounting groove; 30. First power mechanism; 31. First servo motor; 32. Gearbox; 33. Output spur gear; 34. Gear ring; 40. Second power mechanism; 41. Second servo motor; 42. Fixing plate; 50. Feeding mechanism; 51. Feeding plate; 511. Support leg; 52. Storage bin; 53. Feeding channel; 54. Sub-feeding unit; 55. Fixed shell; 56. Third servo motor; 57. Threaded rod; 58. Internal threaded block; 59. Push rod; 591. Sensor; 592. Signal reflector; 60. Lens fixing mechanism; 61. Main slider; 62. Push-pull block; 63. Main air pipe; 64. Suction cup; 65. Valve; 651. Wedge block; 66. Linkage pin; 67. Irregular guide rail groove; 68. Negative pressure pump; 69. Conveying pipe; 70. Lens pushing mechanism; 72. Push rod; 73. Limit slider; 74. Return spring; 75. Passive plate; 76. Telescopic unit; 77. Main push rod; 78. First push block; 79. Second push block; 80. Side guard plate; 81. Pulley. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] In the description of this invention, it should be understood that the terms "width", "upper", "lower", "top", "bottom", "inner", "outer", etc., 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.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0036] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] Please see Figures 1 to 3 An automated optical lens spherical detection, sorting, and storage device includes a mounting cabinet 10. A rotary dispensing mechanism 20 is rotatably mounted on the top of the mounting cabinet 10. The rotary dispensing mechanism 20 includes a dispensing frustum 21. Multiple annular dispensing slides 22 are provided on the outer side of the dispensing frustum 21. Mounting holes 26 are provided on the dispensing slides 22, and lens fixing mechanisms 60 are installed within the mounting holes 26. Mounting grooves 27 are also provided on the dispensing slides 22, and lens pushing mechanisms 70 are installed within the mounting grooves 27, positioned above the lens fixing mechanisms 60. The dispensing frustum 21 is composed of upper and lower parts; the upper part is frustum-shaped, and the lower part is cylindrical. The interior of the dispensing frustum 21 is hollow. A support platform 13, fixedly mounted to the mounting cabinet 10, is provided on the inner bottom of the dispensing frustum 21. A feeding mechanism 50 is fixedly installed; a support platform 11 is fixedly connected to the bottom of the inner cavity of the mounting cabinet 10, and a mounting box 12 is installed on the top of the support platform 11. A bearing platform 13 is fixedly installed on the mounting box 12; a limiting block 17, a vision inspection unit 16, a first conveyor belt unit 14, and a second conveyor belt unit 15 are installed on the top of the mounting cabinet 10. There are at least four material distribution slides 22, with each of the four corresponding to one material distribution slide 22 in sequence. The limiting block 17 is located upstream of the vision inspection unit 16, and the vision inspection unit 16 is located upstream of the first conveyor belt unit 14 and the second conveyor belt unit 15. The ends of the first conveyor belt unit 14 and the second conveyor belt unit 15 are respectively connected to the finished product collection area and the defective product collection area. Side guard plates 80 are provided on both sides of the first conveyor belt unit 14 and the second conveyor belt unit 15 to prevent the lens 1 from falling off the conveyor belt.

[0038] Please see Figure 3 A rotating ring 23 is fixedly connected to the bottom of the material distribution platform 21. The rotating ring 23 is rotatably connected to the mounting cabinet 10 through bearings. The mounting cabinet 10 is equipped with a first power mechanism 30 for controlling the rotation of the material distribution platform 21. The first power mechanism 30 includes a first servo motor 31 and a gearbox 32 fixed on the mounting cabinet 10, and a gear ring 34 fixed to the bottom of the rotating ring 23. The output end of the first servo motor 31 is connected to the input end of the gearbox 32. The output end of the gearbox 32 is equipped with an output spur gear 33, which meshes with the gear ring 34.

[0039] Please see Figure 3The surface of the mounting cabinet 10 is movably connected to a pulley 81, and the material distribution frustum 21 is fitted and connected to the pulley 81.

[0040] Please see Figure 4 An auxiliary roller 24 is embedded in the top of the material distribution chute 22 to reduce friction.

[0041] Please see Figure 4 The feeding mechanism 50 includes a feeding plate 51. The bottom of the feeding plate 51 is fixedly connected to the support platform 13 via a support leg 511. A storage bin 52 is installed at the top of the feeding plate 51. A feeding channel 53 is opened in the middle of the feeding plate 51. A sub-feeding unit 54 is installed in the feeding channel 53. The sub-feeding unit 54 is used to push out the lens 1 in the storage bin 52. A channel with a height greater than the thickness of the lens 1 is opened on one side of the bottom of the storage bin 52. The surface of the feeding plate 51 is higher than the distributing frustum 21. The end of the feeding plate 51 is arc-shaped, and the arc is consistent with the arc of the inner edge of the distributing frustum 21. The width is greater than the width of the material distribution slide 22, and both ends of the slide are fixedly connected to side blocks 25; the sub-feeding unit 54 includes a fixed shell 55 fixed to the bottom of the feeding plate 51, a third servo motor 56 is fixedly connected inside the fixed shell 55, a threaded rod 57 is fixedly connected to the output shaft of the third servo motor 56, the threaded rod 57 is rotatably connected to the fixed shell 55, an internal threaded block 58 is threadedly connected to the outer side of the threaded rod 57, a push rod 59 is fixedly connected to the top of the internal threaded block 58, the push rod 59 is located inside the feeding channel 53, and its height is higher than the feeding channel 53 and lower than the thickness of the lens 1.

[0042] Please see Figure 4 A sensor 591 is installed at the bottom of the feeding plate 51. The sensor 591 faces the inner wall of the fixed shell 55. A signal reflector 592 is fixedly connected to the inner wall of the fixed shell 55. There are multiple signal reflectors 592, each corresponding to a material distribution chute 22.

[0043] Please see Figure 5 and Figure 6The lens fixing mechanism 60 includes a main slider 61 slidably mounted in the mounting hole 26 and a negative pressure pump 68 fixedly mounted on the inner wall of the dispensing frustum 21. A suction cup 64 is mounted on the top of the main slider 61, and a push-pull block 62 is fixedly connected to the tail of the main slider 61. The air inlet of the negative pressure pump 68 is connected to a delivery pipe 69, which is a flexible hose. The end of the delivery pipe 69 is connected to a main air pipe 63. One end of the main air pipe 63 passes through the push-pull block 62 and the main slider 61 and is connected to the suction cup 64. The negative pressure pump 68 is used to provide negative pressure to the suction cup 64. A valve 65 is installed at the other end of the main air pipe 63. The valve 65 is a normally open pressure valve. A wedge 651 is fixedly connected to the top of the valve stem. The working principle of the normally open pressure valve is: the main air pipe 63 is kept open under normal conditions, and the main air pipe 63 is disconnected when the wedge 651 is squeezed. A shaped guide rail groove 67 is installed circumferentially on the surface of the support platform 13. The shaped guide rail groove 67 is circular in general, but it protrudes outward at the position corresponding to the vision detection unit 16. A linkage pin 66 is fixedly connected to the bottom of the push-pull block 62. The linkage pin 66 is slidably connected to the shaped guide rail groove 67.

[0044] Please see Figure 7 and Figure 8 The lens pushing mechanism 70 includes a push rod 72 slidably connected in the mounting groove 27 and a telescopic unit 76. A limit slider 73 is fixedly connected to the middle of the push rod 72. A return spring 74 is installed between the limit slider 73 and the mounting groove 27. One end of the push rod 72 extends into the inner cavity of the distributing frustum 21 and is fixedly connected to a passive plate 75. The telescopic unit 76 is an electric telescopic rod or a cylinder. The telescopic unit 76 is fixedly installed on the support platform 13. A main push rod 77 is fixedly connected to the output end of the telescopic unit 76. A first push block 78 is fixedly connected to the top end of the main push rod 77. The bottom of the main push rod 77 is fixedly connected to the first push block 78. A second push block 79 is fixedly connected. The first push block 78 and the passive plate 75 are at the same height. The second push block 79 and the wedge block 651 are at the same height. The end face of the second push block 79 is an inclined plane with the same slope as the wedge block 651. A second power mechanism 40 is installed inside the mounting box 12. The second power mechanism 40 is used to control the rotation angle of the telescopic unit 76. The second power mechanism 40 includes a second servo motor 41. The output shaft of the second servo motor 41 extends out of the bearing platform 13 and is connected to the fixed plate 42. The output shaft of the second servo motor 41 is located at the axis of the material distribution frustum 21.

[0045] The entire device uses the mounting cabinet 10 as its base, the support platform 11 supports the mounting box 12, and the bearing platform 13 is fixed to the top surface of the mounting box 12. The entire machine consists of five major processes: feeding, station rotation, roundness detection, release and push, and sorting and collection. It relies on the rotating material distribution mechanism 20 to achieve synchronous rotation of multiple stations. The specific operation process is as follows: The loading process: The stacked lenses 1 are placed inside the storage bin 52 of the loading mechanism 50. The first servo motor 31 of the first power mechanism 30 is reduced by the gearbox 32 and drives the output spur gear 33 to mesh with the gear ring 34, which drives the rotating ring 23 to rotate with the distributing table 21. When the distributing slide 22 on the distributing table 21 rotates to be aligned with the feeding plate 51, the sensor 591 is aligned with the signal reflector 592, and the control system stops the first servo motor 31. The third servo motor 56 of the starter feeding unit 54 drives the threaded rod 57 to rotate, driving the internal threaded block 58 and the push rod 59 to perform reciprocating linear motion, pushing out a single lens 1 from the bottom of the storage barrel 52. The lens slides into the distribution slide 22, and the limiting block 17 prevents the lens from tipping over and assists in positioning. In the lens fixing mechanism 60, the negative pressure pump 68 works continuously, and the negative pressure is transmitted to the suction cup 64 through the delivery pipe 69 and the main air pipe 63. The suction cup 64 uses negative pressure to adsorb and fix the lens 1 that has slid into place.

[0046] Workstation rotation and inspection station extension actions: The first power mechanism 30 drives the dispensing table 21 to rotate again, transferring the dispensing slide 22 with adsorbed lenses to the workstation of the vision inspection unit 16; the lens fixing mechanism 60 revolves with the dispensing table 21, and the linkage pin 66 slides along the irregular guide groove 67; the irregular guide groove 67 protrudes outward at the corresponding position of the vision inspection unit 16, pushing the push-pull block 62 and the main slider 61 to slide outward along the mounting slide hole 26, driving the suction cup 64 and the lens 1 to extend outward from the dispensing slide 22, avoiding structural obstruction, and leaving a complete field of view for the vision inspection unit 16; the vision inspection unit 16 collects the outer edge contour of the lens, completes the lens roundness detection, and transmits the qualified / defective signal to the whole machine control system.

[0047] Lens unloading and pushing process: After the inspection is completed, the rotating material distribution mechanism 20 continues to rotate, transferring the lens to the corresponding workstation of the first conveyor belt unit 14 or the second conveyor belt unit 15.

[0048] The second servo motor 41 of the second power mechanism 40 drives the fixed plate 42 to rotate, aligning the main push rod 77 of the telescopic unit 76 with the current work position. The telescopic unit 76 extends, and the inclined surface of the second push block 79 presses against the wedge block 651, pressing the normally open pressure valve 65, cutting off the air passage of the main air pipe 63, and releasing the negative pressure of the suction cup 64. At the same time, the first push block 78 pushes the passive plate 75, causing the top rod 72 to move outward, pushing the lens off the suction cup 64. The lens falls onto the corresponding conveyor belt. The side guard plate 80 prevents the lens from falling off the sides of the conveyor belt. The telescopic unit 76 retracts, and the limit slider 73 drives the top rod 72 to reset under the action of the reset spring 74; the wedge block 651 releases the squeeze, the valve 65 resets and opens the air passage, the suction cup 64 restores the negative pressure adsorption capacity, and at the same time the linkage pin 66 slides from the raised section to the lower section along the irregular guide rail groove 67, and the main slider 61 retracts inward to reset, ready for the next adsorption of the lens.

[0049] Multi-station parallel cyclic operation: The rotating material distribution mechanism 20 rotates by one station angle, and the equipment simultaneously executes multiple sets of actions: the feeding mechanism 50 completes the feeding of the next lens; the vision inspection unit 16 performs true roundness inspection on the previous lens; the lens pushing mechanism 70 completes the pushing and unloading of the inspected lens; The first conveyor belt unit 14 transports qualified lenses to the finished product collection area, and the second conveyor belt unit 15 transports defective lenses to the defective product collection area.

[0050] Among them, valve 65 is a normally open pressure valve, with a wedge 651 fixedly connected to the top of the valve stem. The working principle of the normally open pressure valve is: under normal conditions, the main air pipe 63 is kept open; when the wedge 651 is squeezed, the main air pipe 63 is disconnected. Valve 65 is a mechanically triggered two-position two-normally open control valve. The valve body contains: valve stem, built-in spring, valve core seal, valve seat, and vacuum air passage. The valve stem extends upwards from the valve body, and the wedge 651 is rigidly fixed at the top of the valve stem. The wedge 651 with an inclined surface converts the horizontal thrust into a vertically downward valve stem displacement. The spring normally pushes the valve stem upward, causing the valve core to disengage from the valve seat, thus opening the air passage of the main air pipe 63. One end of the main air pipe 63 is connected to the delivery pipe 69 of the negative pressure pump 68, and the other end is connected to the suction cup 64, providing vacuum suction force for the suction cup. When no external force is applied to the wedge block 651, the internal spring of the valve lifts the valve stem upward, separating the valve core from the valve seat, and the air passage of the main air pipe 63 is fully open. The negative pressure pump 68 continues to work, and the vacuum negative pressure passes through the delivery pipe 69, the valve 65, and the main air pipe 63 directly to the suction cup 64. The suction cup generates negative pressure to firmly adhere to the lens 1, completing the lens fixation. When the wedge is compressed, it is triggered to close. The telescopic unit 76 of the lens pushing mechanism 70 extends, and the inclined surface of the second pusher 79 fits against the inclined surface of the wedge 651. The horizontal thrust is converted into a vertical downward pressure through the inclined wedge mechanism, pressing the valve stem downward to compress the internal spring. The downward movement of the valve stem causes the valve core to press against the valve seat sealing surface, directly cutting off the vacuum flow channel inside the main air pipe 63. The vacuum from the negative pressure pump cannot be transmitted to the suction cup 64, and the negative pressure inside the suction cup is quickly released and disappears. The telescopic unit 76 retracts, the second pusher 79 leaves the wedge 651, and the valve stem no longer bears the downward pressure. The internal spring of the valve rebounds, resetting the valve stem and the wedge 651 upward. The valve core leaves the valve seat, the air passage of the main air pipe 63 is restored, and the suction cup 64 regains its vacuum adsorption capacity, waiting for the adsorption of the next lens.

[0051] In this device, sensor 591 is a retroreflective mirror-reflective photoelectric sensor, with the transmitter and receiver integrated inside the same housing, continuously emitting a modulated infrared beam. Multiple signal reflectors 592 are fixed to the inner wall of the fixed housing 55, with each material distribution chute 22 corresponding to one signal reflector 592, revolving around the material distribution platform 21. The sensor constantly emits light, but only when the beam precisely hits the signal reflector 592 can a high-intensity directional return be received. Targeting ordinary metal housings or mechanical structures only produces weak, scattered reflections, failing to reach the sensor's trigger threshold and thus not outputting a valid positioning signal. The first power mechanism 30 drives the material distribution platform 21 to rotate continuously. At this time, the emitted beam from sensor 591 is not aligned with the signal reflector 592, and the beam illuminates the ordinary metal inner wall of the fixed housing 55 and other mechanical structure surfaces. Ordinary machined metal surfaces only produce diffuse reflection, scattering the light in all directions, with only a very small amount of scattered light returning to the sensor's receiving window, and the light intensity is lower than the sensor's internal preset threshold. If the sensor outputs an out-of-position signal, the processor determines that the material distribution chute 22 is not aligned with the feeding position. The processor does not output stop or push commands to the first servo motor 31 or the third servo motor 56. The material distribution table 21 continues to rotate, while the sub-feeding unit 54 remains stationary and does not perform the pushing and feeding action.

[0052] This invention can also add more material distribution slides 22 and conveyor belt units to perform multi-level subdivision and classification of roundness, achieving multi-level sorting. Specifically, it increases the number of circumferential workstations on the material distribution frustum 21 and adds several material distribution slides 22 in the circumferential direction. Each material distribution slide 22 is equipped with a lens fixing mechanism 60, including mounting sliding holes 26, main sliders 61, suction cups 64, normally open pressure valves 65, and linkage pins 66. The same irregularly shaped guide rail groove 67 is used to complete the lens extension and retraction action. The original irregularly shaped guide rail groove 67 does not need to be re-processed. It is only necessary to ensure that the linkage pins 66 of each workstation can slide along the guide rail groove to reach the vision inspection unit 16. When in position, the lens automatically extends outward, while other positions retract normally. Along the circumferential direction at the top of the mounting cabinet 10, the third, fourth…Nth conveyor belt units are sequentially arranged along the downstream direction of the rotating material distribution mechanism 20 to prevent lenses from falling. Each conveyor belt ends with a lens collection box of a different grade, such as: premium grade collection box, first grade collection box, second grade collection box, slightly chipped defective products, and severely out-of-tolerance scrap products. The entire machine retains only one set of telescopic unit 76 and main push rod 77. The second servo motor 41 of the second power mechanism 40 at the center drives the fixed plate 42 to rotate circumferentially, causing the main push rod 77 to rotate and align above any discharge position. When increasing sorting levels, only the slide, lens fixing mechanism, and discharge conveyor belt are added; only one push-top execution mechanism is retained, significantly controlling hardware costs. In summary, this invention relies on the rotation of the material distribution platform 21 of the rotary material distribution mechanism 20 to carry out the feeding, inspection and unloading processes simultaneously and in parallel. The feeding mechanism 50, the vision inspection unit 16 and the lens pushing mechanism 70 work at the same time, without waiting for the completion of a single process before executing the next process, which greatly shortens the overall cycle time and improves the efficiency of batch inspection and sorting of optical lenses.

[0053] The material distribution platform 21 of the present invention can be equipped with multiple material distribution slides 22 and corresponding conveyor belt units. Relying only on one lens pushing mechanism 70 and the second power mechanism 40 to rotate and switch the pushing position, the lenses can be divided into multiple grades according to their roundness. It is not limited to the simple qualified / unqualified binary method, but realizes automatic classification and storage of multiple categories and multiple precision grades, and the equipment modification cost is low.

[0054] This invention utilizes the cam of the irregularly shaped guide groove 67 and the linkage pin 66. The slider follow-up mechanism automatically drives the main slider 61 to extend / retract the lens during the revolution of the distributing table 21. This eliminates the need for additional linear servo cylinders to drive lens feeding, reducing the number of motors and cylinders, simplifying the overall machine control logic, and lowering the failure rate. The lens fixing mechanism 60 uses a normally open pressure valve 65. The second push block 79 of the lens pushing mechanism 70 simultaneously presses against the inclined wedge block 651 to complete the negative pressure cut-off and mechanical pushing. The negative pressure cut-off and lens pushing actions are executed synchronously, avoiding malfunctions such as the lens not being able to be pushed due to unresolved negative pressure or the lens flying erratically due to premature negative pressure release. The release action is stable and reliable, protecting the lens from impact damage.

[0055] This invention only requires periodically replenishing the stacked lenses to the storage bin 52. The whole machine automatically completes single-piece feeding, negative pressure fixing, true round visual inspection, automatic pushing, and classified conveying and collection. The sensor 591, together with the signal reflector 592, achieves precise positioning of the workstation, reduces manual operation, and is suitable for mass production scenarios on factory assembly lines.

[0056] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fully automated optical lens roundness detection, sorting, and storage device, comprising a mounting cabinet (10), characterized in that: The mounting cabinet (10) is rotatably equipped with a rotating material distribution mechanism (20), which includes a material distribution frustum (21). The material distribution frustum (21) is provided with a plurality of material distribution slides (22) in a circumferential manner. Each material distribution slide (22) is correspondingly equipped with a lens fixing mechanism (60) and a lens pushing mechanism (70). The mounting cabinet (10) is provided with a first power mechanism (30) for driving the material distribution frustum (21) to rotate. The mounting cabinet (10) is provided with a support platform (13), and the support platform (13) is equipped with a feeding mechanism (50). The feeding mechanism (50) is equipped with a sensor (591) and a signal reflector (592) corresponding to the material distribution slide (22). The support platform (13) is provided with an annular irregular guide rail groove (67), and the lens fixing mechanism (60) is slidably engaged with the irregular guide rail groove (67); the lens fixing mechanism (60) is provided with a negative pressure adsorption component and a valve (65) that can be mechanically squeezed to open or close the air passage; the lens pushing mechanism (70) includes a telescopic unit (76) and a push block assembly; the mounting cabinet (10) is provided with a second power mechanism (40) that drives the telescopic unit (76) to rotate circumferentially. The mounting cabinet (10) is also equipped with a vision inspection unit (16) and at least two sets of conveyor belt units; the irregular guide rail groove (67) is provided with an outward protrusion section corresponding to the position of the vision inspection unit (16), which is used to drive the lens fixing mechanism (60) to drive the lens to extend or retract the material distribution slide (22).

2. The fully automated optical lens roundness detection, sorting, and storage device according to claim 1, characterized in that: The sensor (591) works in conjunction with the signal reflector (592) to detect the position of the workstation. The signal reflector (592) rotates synchronously with the material distribution table (21), and each material distribution slide (22) corresponds to a unique signal reflector (592).

3. The fully automated optical lens roundness detection, sorting, and storage device according to claim 1, characterized in that: The first power mechanism (30) includes a first servo motor (31), a gearbox (32), an output spur gear (33), and a gear ring (34); the gear ring (34) is fixedly connected to the rotating ring (23) at the bottom of the material distribution platform (21), the output end of the first servo motor (31) is connected to the input end of the gearbox (32), the output end of the gearbox (32) is equipped with the output spur gear (33), and the output spur gear (33) meshes with the gear ring (34) for transmission.

4. The fully automated optical lens roundness detection, sorting, and storage device according to claim 1, characterized in that: The lens fixing mechanism (60) includes a main slider (61), a push-pull block (62), a linkage pin (66), and a suction cup (64); the material distribution slide (22) has an installation slide hole (26), and the main slider (61) is slidably assembled inside the installation slide hole (26); the push-pull block (62) is connected to the outside of the main slider (61), and the linkage pin (66) is fixedly connected to the lower end of the push-pull block (62), and the linkage pin (66) is slidably inserted into the irregular guide rail groove (67).

5. The fully automated optical lens roundness detection, sorting, and storage device according to claim 4, characterized in that: The suction cup (64) is located at the top of the main slider (61), and the suction cup (64) is connected to the negative pressure pump (68) to form a negative pressure adsorption assembly.

6. The fully automated optical lens roundness detection, sorting, and storage device according to claim 1, characterized in that: The valve (65) is a normally open pressure valve, and a wedge (651) is fixedly installed at the top of the valve stem of the valve (65); the push block assembly includes a second push block (79), and the second push block (79) is provided with an inclined surface that is adapted to the wedge (651).

7. The fully automated optical lens roundness detection, sorting, and storage device according to claim 6, characterized in that: The pusher assembly also includes a first pusher (78), and the lens pushing mechanism (70) also includes a pusher rod (72), a limiting slider (73), a reset spring (74), and a passive plate (75); the material distribution slide (22) has an installation groove (27), the pusher rod (72) is slidably disposed in the installation groove (27), the limiting slider (73) is fixedly connected to the middle of the pusher rod (72), and the reset spring (74) abuts against the groove wall of the installation groove (27); the passive plate (75) is fixed to the inner end of the pusher rod (72).

8. The fully automated optical lens roundness detection, sorting, and storage device according to claim 1, characterized in that: The second power mechanism (40) includes a second servo motor (41) and a fixed plate (42); the second servo motor (41) is fixedly arranged inside the mounting box (12), the output shaft of the second servo motor (41) extends upward along the central axis of the material distribution frustum (21) to the bearing platform (13), the end of the output shaft is fixed to the fixed plate (42), and the telescopic unit (76) is fixedly installed on the fixed plate (42).

9. The fully automated optical lens roundness detection, sorting, and storage device according to claim 1, characterized in that: The feeding mechanism (50) also includes a feeding plate (51), a storage bin (52), and a sub-feeding unit (54); the feeding plate (51) is fixed on the support platform (13) by a support leg (511), and the arc of the end of the feeding plate (51) matches the arc of the inner circle of the material distribution truncated cone (21); the storage bin (52) is installed above the feeding plate (51), and a discharge channel is opened at the bottom of the storage bin (52); the sub-feeding unit (54) includes a third servo motor (56), a threaded rod (57), an internal threaded block (58), and a push rod (59), the push rod (59) is movably located in the feeding channel (53), and the height of the push rod (59) is higher than the bottom surface of the feeding channel and lower than the thickness of the lens.

10. The fully automated optical lens roundness detection, sorting, and storage device according to claim 1, characterized in that: The conveyor belt unit includes a first conveyor belt unit (14) and a second conveyor belt unit (15); the first conveyor belt unit (14) is connected to the finished product collection area, and the second conveyor belt unit (15) is connected to the defective product collection area; a limiting block (17) is also provided at the top of the mounting cabinet (10), and the limiting block (17) is arranged on the side of the loading station.

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