FPC appearance detection equipment and FPC appearance detection method

Abstract

The invention relates to the technical field of FPC detection, in particular to FPC appearance detection equipment and an FPC appearance detection method.The FPC appearance detection equipment comprises a first conveying mechanism which comprises a first guide rail and a first bearing table sliding along the first guide rail; the second conveying mechanism comprises a second bearing table and a second guide rail parallel to the first guide rail, the second bearing table is slidably connected to the second guide rail, and the first bearing table and the second bearing table are both used for bearing products; the overturning mechanism is arranged between the first conveying mechanism and the second conveying mechanism and is used for overturning the front and back surfaces of the product; the first detection mechanism is used for performing high-precision detection on the product on the first bearing table; according to the invention, the influence caused by the time consumption difference of front and back detection is balanced, the efficient cooperation of the detection process is realized, the problem of low detection efficiency caused by the time consumption difference of detection is avoided, and the whole detection system can operate more stably and efficiently.

Description

Technical Field

[0001] The present invention relates to the technical field of FPC detection, and particularly to an FPC appearance detection device and an FPC appearance detection method. Background Art

[0002] In the field of electronic manufacturing, flexible printed circuit boards (FPCs) are widely used in various electronic products due to their characteristics such as being thin, light, and bendable. With the development of electronic products towards miniaturization and high performance, the quality requirements for FPCs are becoming increasingly stringent. As an important link in ensuring product quality, FPC appearance detection needs to accurately identify various possible defects on both the front and back sides. Since the front side of the FPC usually carries key structures such as complex circuit layouts and precise pads, which play a decisive role in the electrical performance of electronic products, high-precision appearance detection is required on the front side to capture subtle defects such as circuit breaks, short circuits, and pad oxidation. While the back side of the FPC has a relatively simple structure, mainly focusing on obvious appearance defects such as scratches and stains, so only low-precision detection is needed. This difference in detection precision between the front and back sides directly leads to differences in the time and complexity required for detection.

[0003] Currently, existing FPC appearance detection devices generally adopt a linear one-way detection method. The device will sequentially detect the front and back sides of the FPC in a preset fixed order. Specifically, during operation, the device first fixes the FPC at the detection station and performs high-precision detection on the front side. After completing the front-side detection, the FPC is then flipped to perform low-precision detection on the back side. However, since the high-precision detection on the front side involves complex processes such as image acquisition and algorithm analysis, the time required is significantly more than the low-precision detection on the back side. The difference in detection time between the front and back sides results in a large amount of waiting and idle time during the detection process of the device, and the overall detection efficiency is low, making it difficult to meet the requirements of large-scale production for fast and efficient quality detection. Summary of the Invention

[0004] The object of the present invention is to provide an FPC appearance detection device and an FPC appearance detection method to solve the problem of low efficiency in FPC appearance detection in the prior art.

[0005] The technical solution of the present invention is as follows: An FPC appearance detection device includes: a first conveying mechanism, including a first guide rail and a first carrier platform that slides along the first guide rail; a second conveying mechanism, including a second carrier platform and a second guide rail parallel to the first guide rail, the second carrier platform is slidably connected to the second guide rail, and both the first carrier platform and the second carrier platform are used to carry products; a flipping mechanism, arranged between the first conveying mechanism and the second conveying mechanism, for flipping the front and back sides of the product; a first handling mechanism, having at least a stroke to move between the first conveying mechanism and the flipping mechanism to transfer the product; a second handling mechanism, having at least a stroke to move between the second conveying mechanism and the flipping mechanism to transfer the product; a first detection mechanism, arranged on the top of the first guide rail, for high-precision detection of the product on the first carrier platform; a second detection mechanism, arranged on the top of the second guide rail, for low-precision detection of the product on the second carrier platform.

[0006] Preferably, the first guide rail includes a first transfer section and a first detection section, the second guide rail includes a second transfer section and a second detection section, and the first transfer section, the flipping mechanism, and the second transfer section are arranged in sequence along a first direction; the FPC appearance detection device includes a support frame that spans across the first guide rail and the second guide rail along the first direction, the first transfer section and the second transfer section are located on the same side of the support frame, and the first detection section and the second detection section are located on the other side of the support frame; the first handling mechanism and the second handling mechanism are fixedly arranged on the side of the support frame facing the first transfer section, and the first detection mechanism and the second detection mechanism are fixedly arranged on the side of the support frame facing the second transfer section.

[0007] Preferably, the first handling mechanism includes a first driving component and a first carrier plate, the second handling mechanism includes a second driving component and a second carrier plate, the first driving component and the second driving component are fixedly arranged on the same side of the support frame, and both have translational degrees of freedom along the first direction and the vertical direction; the stroke range of the first driving component includes the flipping mechanism, the first transfer section, and the extended space of the first transfer section away from the flipping mechanism to transfer the product or load and unload the product, and the stroke range of the second driving component includes the flipping mechanism, the second transfer section, and the extended space of the first transfer section away from the flipping mechanism to transfer the product or recycle unqualified products.

[0008] Preferably, the flipping mechanism includes a carrier frame and a flipping motor, the carrier frame is fixedly arranged on the output shaft of the flipping motor, the carrier frame is sequentially provided with a first adsorption platform, a second adsorption platform, and a third adsorption platform, and the first adsorption platform and the third adsorption platform move towards the second adsorption platform to clamp the product for simultaneously flipping the front and back sides of two products.

[0009] Preferably, the first detection mechanism includes a first transmission assembly and a first camera, the first transmission assembly having a degree of freedom along a first direction is fixedly mounted on the support frame, the first camera is fixedly mounted at the output end of the first transmission assembly, the first transmission assembly drives the first camera to reciprocate along the first direction relative to the first detection section, the first support platform moves unidirectionally and intermittently in the first detection section, for high-precision detection of the front side of the product on the first support platform; the second detection mechanism includes a second transmission assembly and a second camera, the second transmission assembly having a degree of freedom along the first direction is fixedly mounted on the support frame, the second camera is fixedly mounted at the output end of the second transmission assembly, the second transmission assembly drives the second camera to reciprocate along the first direction relative to the second detection section, the second support platform moves unidirectionally and intermittently in the second detection section, for low-precision detection of the back side of the product on the second support platform.

[0010] Preferably, a first sealing and pressing mechanism is provided at the top of the first guide rail, the first sealing and pressing mechanism includes a first bracket and a first glass, the first bracket movably carries the first glass and moves toward the first guide rail in a vertical direction, so as to cover or detach the first glass from the first supporting platform; a second sealing and pressing mechanism is provided at the top of the second guide rail, the second sealing and pressing mechanism includes a second bracket and a second glass, the second bracket movably carries the second glass and moves toward the second guide rail in a vertical direction, so as to cover or detach the second glass from the second supporting platform.

[0011] Preferably, the first detection section has a first covering section extending in a direction away from the first transfer section, and the first sealing mechanism is located at the top of the first covering section; the second detection section has a second covering section extending in a direction away from the second transfer section, and the second sealing mechanism is located at the top of the second covering section.

[0012] Preferably, the first sealing and pressing mechanism is located at the top of the first transfer section, and the second sealing and pressing mechanism is located at the top of the second transfer section.

[0013] The present application also provides a method for detecting the appearance of an FPC In a first time period, the first product faces upward and arrives at the first loading platform; In the second time period, the first product arrives at the first detection section and the detection starts; at the same time, the second product, with its reverse side facing upward, arrives at the second loading platform; During the third time period, the second product arrives at the second detection section and the detection begins; In the fourth time period, the first product and the second product continue to perform inspections synchronously until the inspections are completed; thus, the high-precision inspection time for the front side of the first product is the sum of the third time period and the fourth time period, and the low-precision inspection time for the back side of the second product is the fourth time period. In the fifth time period, the first product and the second product are flipped synchronously, and the first product with the back side facing up is transferred to the second inspection section, and the second product with the front side facing up is transferred to the first inspection section. In the sixth time period, the first product and the second product perform inspections synchronously. The low-precision inspection of the first product is completed first and is removed from the production line. In the seventh time period, the high-precision inspection of the second product is completed and is removed from the production line; thus, the low-precision inspection time for the back side of the first product is the sixth time period, and the high-precision inspection time for the front side of the second product is the sum of the sixth time period and the seventh time period.

[0014] Preferably, S1: In the first time period, the first handling mechanism adsorbs the first product and transfers it to the first carrier table located in the first transfer section, and at this time, the front side of the first product faces up. S2: In the second time period, the first carrier table moves from the first transfer section to the first capping section. The first capping mechanism caps the first glass on the first carrier table. Subsequently, the first carrier table moves to the first inspection section. Synchronously, the first handling mechanism adsorbs the second product and transfers it to the third adsorption table, and the second handling mechanism transfers the second product located on the third adsorption table to the second carrier table located in the second transfer section, and at this time, the back side of the second product faces up. S3: In the third time period, the first inspection mechanism performs a high-precision inspection on the front side of the first product located in the first inspection section. Synchronously, the second carrier table drives the second product to move to the second capping section, and the second capping section caps the second glass on the second product. The second carrier table drives the second product to move to the second inspection section, and the second inspection mechanism performs a low-precision inspection on the back side of the second product located in the second inspection section. S4: In the fourth time period, the first inspection mechanism completes the high-precision inspection of the front side of the first product. The first carrier table moves to the first capping section, and the first capping mechanism removes the first glass. The first carrier table drives the first product to move to the first transfer section, and the first handling mechanism adsorbs the first product and transfers it to the third adsorption table. Synchronously, the second inspection mechanism completes the low-precision inspection of the back side of the second product. Subsequently, the second carrier table moves to the second capping section, and the second capping mechanism removes the second glass. The second carrier table drives the second product to move to the second transfer section, and the second handling mechanism adsorbs the second product and transfers it to the second adsorption table. S5: In the fifth time period, both the first adsorption table and the third adsorption table move towards the third adsorption table to clamp two products. The flipping mechanism rotates 180 degrees, and the first adsorption table and the third adsorption table move in the direction away from the second adsorption table. At this time, the first adsorption table is at the bottom and bears the second product with the second product facing upwards, the second adsorption table bears the first product with the first product facing downwards; The first detection mechanism adsorbs the second product and transfers it to the first bearing table located in the first transfer section. The first bearing table moves to the first capping section, and the first capping mechanism caps the first glass on the first bearing table. The first bearing table moves to the first detection section for the first detection mechanism to perform high-precision detection on the front of the second product; Synchronously, the second detection mechanism adsorbs the first product and transfers it to the second bearing table located in the second transfer section. The second bearing table moves to the second capping section, and the second capping mechanism caps the second glass on the second bearing table. The second bearing table moves to the second detection section for the second detection mechanism to perform low-precision detection on the back of the first product; S6: In the sixth time period, the second detection mechanism completes the low-precision detection of the back of the first product. The second bearing table moves to the second capping section, and the second capping mechanism removes the second glass. Subsequently, the second bearing table moves to the second transfer section; If both the front and back of the first product are detected to be qualified, the second handling mechanism transfers the first product on the second bearing table to the third adsorption table. The first handling mechanism adsorbs the first product on the third adsorption table and transfers it out of the first transfer section to unload the first product; S7: In the seventh time period, the first detection mechanism completes the high-precision detection of the front of the second product. The first bearing table moves to the first capping section, and the first capping mechanism removes the first glass. Subsequently, the first bearing table moves to the first transfer section; If both the front and back of the second product are detected to be qualified, the first handling mechanism adsorbs the second product on the first bearing table and transfers it out of the first transfer section to unload the second product; S8: When it is detected that any side of the two products is unqualified, the products are transferred out of the second transfer section through the second handling component for product recycling.

[0015] Compared with the prior art, the advantages of the present invention are: The first transfer mechanism and the second transfer mechanism operate independently. While the first detection mechanism performs high-precision detection on the products on the first carrier table, the second detection mechanism performs low-precision detection on the products on the second carrier table. Through this parallel detection method, the detection time is fully utilized, and the idle time of the equipment caused by waiting for the completion of the front-side detection is reduced. Through the coordinated work of the first transfer mechanism, the second transfer mechanism, the flipping mechanism, the first handling mechanism, and the second handling mechanism, while the high-precision front-side detection is in progress, the low-precision back-side detection or other detection preparation work of another product can be carried out, thus balancing the impact brought by the difference in detection time between the front and back sides, realizing the efficient coordination of the detection process, avoiding the problem of low detection efficiency caused by the difference in detection time, and enabling the entire detection system to operate more stably and efficiently. Brief Description of the Drawings

[0016] The present invention will be further described below in conjunction with the drawings and embodiments: Figure 1 It is a schematic structural diagram of an FPC appearance detection device according to the present invention; Figure 2 It is a schematic structural diagram of the first handling mechanism according to the present invention; Figure 3 It is a schematic structural diagram of the flipping mechanism according to the present invention; Figure 4 It is a schematic structural diagram of the second handling mechanism according to the present invention; Figure 5 It is a schematic structural diagram of the first detection mechanism and the second detection mechanism according to the present invention; Figure 6 It is a schematic structural diagram of the first sealing and pressing mechanism and the second sealing and pressing mechanism according to the present invention; Figure 7 It is a schematic structural diagram of an FPC appearance detection device according to Embodiment 2 of the present invention.

[0017] Description of the Reference Numerals: 1. First transfer mechanism; 11. First guide rail; 111. First transfer section; 112. First detection section; 113. First covering and pressing section; 12. First carrier; 2. Flipping mechanism; 22. Flipping motor; 23. Carrier frame; 24. First adsorption table; 25. Second adsorption table; 26. Third adsorption table; 27. Linear guide rail; 3. Second transfer mechanism; 31. Second guide rail; 311. Second transfer section; 312. Second detection section; 313. Second covering and pressing section; 32. Second carrier; 4. First handling mechanism; 41. First drive assembly; 411. First track; 412. First slide rail; 413. Second slide rail; 414. First slider; 42. First carrier plate; 43. First adsorption nozzle; 5. Second handling mechanism; 51. Second drive assembly; 511. Second track; 512. Third slide rail; 513. Fourth slide rail; 514. Second slider; 52. Second carrier plate; 53. Second adsorption nozzle; 61. First detection mechanism; 611. First drive component; 6111. First lead screw; 6112. First guide frame; 612. First camera; 62. Second detection mechanism; 621. Second drive component; 6211. Second lead screw; 6212. Second guide frame; 622. Second camera; 71. First sealing and pressing mechanism; 711. First cylinder; 712. First bracket; 713. First glass; 714. First support bar; 72. Second sealing and pressing mechanism; 721. Second cylinder; 722. Second bracket; 723. Second glass; 724. Second support bar; 8. Support frame. Detailed implementation manners

[0018] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0019] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. Embodiment 1

[0021] As Figure 1 shown, an FPC appearance detection device includes a first conveying mechanism 1, a flipping mechanism 2, and a second conveying mechanism 3 arranged in sequence along a first direction. A first detection mechanism 61 is movably connected to the first conveying mechanism 1 for high-precision detection of products on the first conveying mechanism 1. A second detection mechanism 62 is movably connected to the second conveying mechanism 3 for low-precision detection of products on the second conveying mechanism 3. The first conveying mechanism 1 is provided with a first handling mechanism 4 for transferring products to the first conveying mechanism 1 and the flipping mechanism 2. The second conveying mechanism 3 is provided with a second handling mechanism 5 for transferring products to the second conveying mechanism 3 and the flipping mechanism 2. The flipping mechanism 2 flips two products simultaneously. The first handling mechanism 4 and the second handling mechanism 5 transfer the corresponding products to perform high-precision detection on the front side of one product, while performing low-precision detection and pre-detection preparation work on the back side of the other product. Two products are detected as a group, greatly improving the product detection efficiency.

[0022] The first conveying mechanism 1 includes a first guide rail 11 and a first carrier 12. The first guide rail 11 sequentially includes a first transfer section 111, a first detection section 112, and a first covering section 113 along a second direction. The first carrier 12 slides between the first transfer section 111, the first detection section 112, and the first covering section 113 along the second direction. The top of the first carrier 12 is configured as a horizontal plane for carrying products. A plurality of adsorption holes are uniformly opened on the top of the first carrier 12 for adsorbing products on the top plane of the first carrier 12. In this embodiment, the first carrier 12 is a pneumatic adsorption platform. In other embodiments, the first carrier platform can adopt a vacuum adsorption platform or a porous ceramic adsorption platform. Preferably, the front side of the product on the first carrier 12 faces upward, that is, high-precision detection is performed on the product on the first carrier 12.

[0023] As Figure 2As shown, the first handling mechanism 4 is disposed at a position near the first transfer section 111 of the first guide rail 11. The first handling mechanism 4 includes a first driving assembly 41 and a first bearing plate 42. The first driving assembly 41 expands and contracts in the first direction, and the first bearing plate 42 is fixedly provided at the end of the first driving assembly 41. Preferably, the first bearing plate 42 passes through the turning mechanism 2, the first transfer section 111 of the first guide rail 11, and the space of the first guide rail 11 away from the turning mechanism 2 in the first direction. It should be noted that there is equipment (not shown in the figure) for loading and unloading products in the space of the first guide rail 11 facing away from the turning mechanism 2. The first handling mechanism 4 obtains the untested products from this equipment or transfers the qualified products to this equipment for collection.

[0024] In this embodiment, the first bearing plate 42 is configured as a plate-like structure. The bottom surface of the first bearing plate 42 is a horizontal plane. A plurality of groups of first suction nozzles 43 are fixedly provided on the bottom surface of the first bearing plate 42. The suction ends of the first suction nozzles 43 are at the same height for sucking products. Preferably, the first suction nozzles 43 are porous suction nozzles. In other embodiments, the first suction nozzles 43 can adopt flat suction nozzles or corrugated suction nozzles.

[0025] As Figure 1 As shown, a support frame 8 is fixedly provided on the top of the first conveyor mechanism 1. The support frame 8 spans the first conveyor mechanism 1 and the second conveyor mechanism 3 in the first direction. Specifically, one end of the support frame 8 in the first direction is fixedly provided on the side surface of the first conveyor mechanism 1, and the other end is fixedly provided on the side surface of the second conveyor mechanism 3. There is a space for products to pass through between the top of the first conveyor mechanism 1 and the bottom of the support frame 8 and between the top of the second conveyor mechanism 3 and the bottom of the support frame 8. The support frame 8 is disposed between the first transfer section 111 and the first detection section 112. That is, one side of the support frame 8 in the second direction is the first transfer section 111, and the other side is the first detection section 112 and the first covering and pressing section 113.

[0026] Preferably, the first driving assembly 41 has translational degrees of freedom in the vertical direction and the first direction. Specifically, the first driving assembly 41 includes a first track 411, a first slide rail 412, and a second slide rail 413. The first track 411 is fixedly provided on the side surface of the support frame 8 facing the first transfer section 111. The first track 411 is arranged in the vertical direction. The first slide rail 412 is slidably connected to the first track 411 in the vertical direction. Preferably, the first slide rail 412 is driven by a motor and a lead screw.

[0027] The first slide rail 412 is horizontally arranged along the first direction. The second slide rail 413 is slidably connected to the first slide rail 412 along the first direction, and the second slide rail 413 is parallel to the first slide rail 412. Preferably, the first slide rail 412 extends along the first direction, and its length range covers the working intervals of the flipping mechanism 2 and the first transfer section 111 of the first transfer mechanism 1. The second slide rail 413 has at least two states. State 1: The second slide rail 413 overlaps with the first slide rail 412. State 2: The second slide rail 413 partially extends out of the first slide rail 412 in the direction away from the flipping mechanism 2. The second slide rail 413 is slidably connected with a first slider 414. The first bearing plate 42 is fixedly arranged on the first slider 414. The first slider 414 slides along the first direction on the second slide rail 413, and the second slide rail 413 slides along the first direction on the first slide rail 412 to drive the first bearing plate 42 to pass through the first transfer section 111 of the first guide rail 11 and the flipping mechanism 2 along the first direction, so as to realize the loading, unloading and transfer of products.

[0028] As Figure 3 shown, the flipping mechanism 2 is arranged between the first transfer mechanism 1 and the second transfer mechanism 3. Both the first transfer mechanism 1 and the second transfer mechanism 3 extend along the second direction. Preferably, the first transfer mechanism 1 and the second transfer mechanism 3 are arranged in parallel along the second direction. Preferably, the flipping mechanism 2, the first transfer mechanism 1 and the second transfer mechanism 3 are fixedly connected through a frame (not shown in the figure). It should be noted that the frame is a shell structure, and the frame has an internal cavity. The devices of the present application are all arranged in the internal cavity of the frame, and the structures of the present application are fixed with the frame as a carrier. The flipping mechanism 2 includes a flipping motor 22 and a bearing frame 23. The shell of the flipping motor 22 is fixedly connected to the frame, the output shaft of the flipping motor 22 is arranged along the second direction, and the output shaft of the flipping motor 22 is fixedly connected to the bearing frame 23.

[0029] The bearing frame 23 is provided with a first adsorption platform 24, a second adsorption platform 25 and a third adsorption platform 26. The first adsorption platform 24 and the third adsorption platform 26 slide in parallel in the opposite or facing directions, and the second adsorption platform 25 is arranged between the first adsorption platform 24 and the third adsorption platform 26. Specifically, a plurality of linear guide rails 27 are fixedly arranged on the side surface of the bearing frame 23 facing the support frame 8. The linear guide rails 27 are perpendicular to the output shaft of the flipping motor 22. The first adsorption platform 24 and the second adsorption platform 25 are sequentially slidably connected to the linear guide rails 27. In this embodiment, the second adsorption platform 25 is fixedly arranged on the bearing frame 23, and the second adsorption platform 25 is located at a position close to the middle of the bearing frame 23 to avoid movement interference with the first handling mechanism 4 and the second handling mechanism 5. In other embodiments, the second adsorption platform 25 is slidably connected to the linear guide rails 27, and the second adsorption platform 25 avoids movement interference with the first handling mechanism 4 and the second handling mechanism 5 by moving up and down.

[0030] The first adsorption platform 24, the second adsorption platform 25 and the third adsorption platform 26 are constructed into parallel plate structures, and the surfaces of the three are provided with adsorption holes for adsorbing products. The adsorption holes of the first adsorption platform 24 are opened on its end surface facing the second adsorption platform 25, the adsorption holes of the third adsorption platform 26 are opened on its end surface facing the second adsorption platform 25, and adsorption holes are opened on both side end surfaces of the second adsorption platform 25. Preferably, the first adsorption platform 24, the second adsorption platform 25 and the third adsorption platform 26 are all connected to an air pump (not shown in the figure) through a hose to generate negative pressure for adsorption.

[0031] The second conveying mechanism 3 includes a second guide rail 31 and a second bearing platform 32. The second guide rail 31 is parallel to the first guide rail 11. The second guide rail 31 includes a second transfer section 311, a second detection section 312, and a second pressing section 313 in sequence along the second direction. The first transfer section 111 and the second transfer section 311 correspond to each other along the first direction. The first detection section 112 and the second detection section 312 correspond to each other along the first direction. The second pressing section 313 corresponds to each other along the first direction. That is, the first transfer section 111 and the second transfer section 311 are located on the same side of the support frame 8. The second bearing platform 32 slides between the second transfer section 311, the second detection section 312, and the second pressing section 313 along the second direction, and is used to transfer products on the second slide rail 413. The top of the second bearing platform 32 is configured as a horizontal plane for carrying products. A plurality of adsorption holes are evenly provided on the top of the second bearing platform 32 for adsorbing products located on the top plane of the second bearing platform 32. In this embodiment, the second carrier 32 is a pneumatic adsorption platform. In other embodiments, the second carrier can be a vacuum adsorption platform or a porous ceramic adsorption platform. Preferably, the product on the second carrier 32 faces upward, that is, the product on the first carrier 12 is subjected to low-precision inspection.

[0032] like Figure 4 As shown, the second transport mechanism 5 is arranged at the second transfer section 311, and the second transport mechanism 5 includes a second drive assembly 51 and a second carrier plate 52. The second drive assembly 51 is retracted along the first direction, and the second carrier plate 52 is fixed at the end of the second drive assembly 51. Preferably, the second carrier plate 52 passes through the flipping mechanism 2, the second transfer section 311 of the second guide rail 31, and the space where the second guide rail 31 is away from the flipping mechanism 2 along the first direction. It is worth noting that a defective product recovery device (not shown in the figure) is provided in the space where the second guide rail 31 is away from the flipping mechanism 2, and the second transport mechanism 5 transfers the unqualified products to the defective product recovery device.

[0033] In this embodiment, the second carrier plate 52 is configured as a plate-like structure. The bottom surface of the second carrier plate 52 is a horizontal plane. A plurality of groups of second suction nozzles 53 are fixedly provided on the bottom surface of the second carrier plate 52. The suction ends of the second suction nozzles 53 are located on the same horizontal plane for stably sucking products. Preferably, the second driving assembly 51 has three mutually perpendicular translational degrees of freedom. Specifically, the second driving assembly 51 includes a second rail 511, a third slide rail 512, and a fourth slide rail 513. The second rail 511 is fixedly provided on the side surface of the support frame 8 facing the second transfer section 311, and the second rail 511 is arranged in the vertical direction. The third slide rail 512 is slidably connected to the second rail 511 in the vertical direction. Preferably, the third slide rail 512 is driven by a motor and a lead screw.

[0034] The third slide rail 512 is horizontally arranged in the first direction. The fourth slide rail 513 is slidably connected to the third slide rail 512 in the first direction, and the fourth slide rail 513 is parallel to the third slide rail 512. Preferably, the third slide rail 512 extends in the first direction, and its length range covers the working intervals of the flipping mechanism 2 and the second transfer section 311 of the second conveying mechanism 3. The fourth slide rail 513 has at least two states. State one: The fourth slide rail 513 overlaps with the third slide rail 512. State two: The fourth slide rail 513 partially extends out of the third slide rail 512 in the direction away from the flipping mechanism 2. A second slider 514 is slidably connected to the third slide rail 512, and the second carrier plate 52 is fixedly provided on the second slider 514 to drive the second carrier plate 52 to pass through the second transfer section 311 and the flipping mechanism 2 in the first direction, so as to realize the transfer of products between the second transfer section 311 and the flipping mechanism 2 and the discharging of unqualified products.

[0035] Combined Figure 1 、 Figure 5 As shown in FIGS., the first detection mechanism 61 and the second detection mechanism 62 are both provided on the side surface of the support frame 8 close to the first detection section 112 and the second detection section 312. The first detection mechanism 61 includes a first transmission assembly 611 and a first camera 612. The first transmission assembly 611 has translational degrees of freedom in the first direction and the vertical direction. The first transmission assembly 611 includes a first lead screw 6111 and a first guide frame 6112. The first lead screw 6111 is rotatably connected to the support frame 8 in the first direction, and the first lead screw 6111 is driven by a motor. The first guide frame 6112 is threadedly connected to the first lead screw 6111, and the first guide frame 6112 translates in the first direction. The moving range of the first guide frame 6112 is the width of the first guide rail 11 in the first direction.

[0036] The first camera 612 is slidably connected to the first guide frame 6112 in the vertical direction. The first camera 612 is arranged facing the first detection section 112. The first camera 612 moves relative to the first guide frame 6112 in the vertical direction to adjust the depth of field of the first camera 612. The first carrier 12 adsorbs the product and moves it to the first detection section 112. The first carrier 12 cooperates with the first transmission assembly 611 to move, so that the first camera 612 detects the front of the product along an "S"-shaped path. Specifically, the first carrier 12 moves intermittently in the first direction. When the first carrier 12 stops, the first guide frame 6112 drives the first camera 612 to perform local detection on the product in the first direction. The first carrier 12 moves a fixed distance in the second direction, and the first guide frame 6112 drives the first camera 612 to perform local detection on the product again in the first direction, so as to perform global detection on the product.

[0037] The first camera 612 is a high-precision camera. Specifically, the first camera 612 uses an industrial camera with 20 million pixels to detect defects such as open / short circuits of the circuit on the front of the product, pad defects, solder mask offset, and micro-scratches.

[0038] The second detection mechanism 62 includes a second transmission assembly 621 and a second camera 622. The second transmission assembly 621 includes a second lead screw 6211 and a second guide frame 6212. The second lead screw 6211 is rotatably connected to the support frame 8 in the second direction. The second guide frame 6212 is threadedly connected to the second lead screw 6211. The second guide frame 6212 moves in the first direction. The second camera 622 is slidably connected to the second guide frame 6212 in the vertical direction. The second camera 622 is arranged facing the second detection section 312 and is used to detect the reverse side of the product located on the second carrier 32. The detection path of the second camera 622 is similar to that of the first camera 612 and will not be elaborated here. The detection accuracy of the second camera 622 is much lower than that of the first camera 612. The detection area of the second camera 622 is larger than that of the first camera 612. The traveling speed of the second guide frame 6212 driving the second camera 622 is greater than the traveling speed of the first guide frame 6112 driving the first camera 612. In this embodiment, the low-precision detection speed of the second detection mechanism 62 for the reverse side of the product is higher than the high-precision detection speed of the first detection mechanism 61 for the front of the product.

[0039] The second camera 622 is a low-precision camera. The second camera 622 uses a two-million-pixel camera to detect macroscopic defects on the reverse side of the product, such as obvious creases, large-area contamination, and warping, and performs non-critical detection on the reverse side of the product.

[0040] Such as Figure 6As shown in the figure, a first sealing and pressing mechanism 71 is provided at the top of the first cover pressing section 113. The first sealing and pressing mechanism 71 includes a first cylinder 711, a first bracket 712, and a first glass 713. The cylinder block of the first cylinder 711 is fixedly connected to the frame. The first cylinder 711 extends in the vertical direction. The first bracket 712 is fixedly connected to the piston rod of the cylinder. The first cylinder 711 drives the first bracket 712 to move in the vertical direction. The first glass 713 is movably carried on the bottom of the first bracket 712. The first bracket 712 approaches the first cover pressing section 113 to cover the first glass 713 on the first bearing table 12 located in the first cover pressing section 113. Specifically, the cross-section of the first bracket 712 in the second direction is "n" shaped, that is, the first bracket 712 has a downward opening. The size of the opening of the first bracket 712 is larger than the size of the first bearing table 12 in the first direction. The first bracket 712 can cover the first bearing table 12 downward. A pair of first support bars 714 are fixedly provided at the bottom opening of the first bracket 712. The first support bars 714 extend in opposite directions. The first support bars 714 can support the first glass 713, and the first support bars 714 avoid interfering with the first bearing table 12 in the vertical direction.

[0041] A second sealing and pressing mechanism 72 is provided at the top of the second cover pressing section 313. The second sealing and pressing mechanism 72 includes a second cylinder 721, a second bracket 722, and a second glass 723. The cylinder block of the second cylinder 721 is fixedly connected to the frame. The second cylinder 721 extends in the vertical direction. The second bracket 722 is fixedly connected to the piston rod of the cylinder. The second cylinder 721 drives the second bracket 722 to move in the vertical direction. The second glass 723 is movably carried on the bottom of the second bracket 722. The second bracket 722 approaches the second cover pressing section 313 to cover the second glass 723 on the second bearing table 32 located in the second cover pressing section 313. Specifically, the cross-section of the second bracket 722 in the second direction is "n" shaped, that is, the second bracket 722 has a downward opening. The size of the opening of the second bracket 722 is larger than the size of the second bearing table 32 in the first direction. The second bracket 722 can cover the second bearing table 32 downward. A pair of second support bars 724 are fixedly provided at the bottom opening of the second bracket 722. The second support bars 724 extend in opposite directions. The second support bars 724 can support the second glass 723, and the second support bars 724 avoid interfering with the second bearing table 32 in the vertical direction.

[0042] The present application also provides an FPC appearance detection method.

[0043] Specifically as follows: S1: The first handling mechanism 4 adsorbs the first product and transfers it to the first bearing table 12 located in the first transfer section 111. At this time, the front side of the first product faces upward.

[0044] S2: The first carrier 12 moves from the first transfer section 111 to the first capping section 113. The first capping mechanism 71 caps the first glass 713 on the first carrier 12. Subsequently, the first carrier 12 moves to the first inspection section 112. Synchronously, the first handling mechanism 4 adsorbs the second product and transfers it to the third adsorption table 26. At this time, the front side of the second product faces upward. The flipping mechanism 2 flips the second product, and the second handling mechanism 5 transfers the second product located on the third adsorption table 26 to the second carrier 32 located on the second transfer section 311. At this time, the back side of the second product faces upward.

[0045] S3: The first inspection mechanism 61 performs high-precision inspection on the front side of the first product located in the first inspection section 112. Synchronously, the second carrier 32 drives the second product to move to the second capping section 313. The second capping section 313 caps the second glass 723 on the second product. The second carrier 32 drives the second product to move to the second inspection section 312. The second inspection mechanism 62 performs low-precision inspection on the back side of the second product located in the second inspection section 312.

[0046] S4: The first inspection mechanism 61 completes the high-precision inspection of the front side of the first product. The first carrier 12 moves to the first capping section 113. The first capping mechanism 71 removes the first glass 713. The first carrier 12 drives the first product to move to the first transfer section 111. The first handling mechanism 4 adsorbs the first product and transfers it to the third adsorption table 26. Since the time for low-precision inspection is less than that for high-precision inspection, synchronously, the second inspection mechanism 62 completes the low-precision inspection of the back side of the second product. The second carrier 32 moves to the second capping section 313. The second capping mechanism 72 removes the second glass 723. The second carrier 32 drives the second product to move to the second transfer section 311. The second handling mechanism 5 adsorbs the second product and transfers it to the second adsorption table 25. The first adsorption table 24 and the third adsorption table 26 both move towards the second adsorption table 25 to clamp the two products. The flipping mechanism 2 rotates 180 degrees. The first adsorption table 24 and the third adsorption table 26 move in a direction away from the second adsorption table 25. At this time, the first adsorption table 24 is at the bottom and carries the second product with the front side of the second product facing upward, and the second adsorption table 25 carries the first product with the back side of the first product facing upward.

[0047] S5: The first detection mechanism 61 adsorbs the second product and transports it to the first carrier 12 located on the first transfer section 111. The first carrier 12 moves to the first capping section 113, and the first capping mechanism 71 caps the first glass 713 on the first carrier 12. Then the first carrier 12 moves to the first detection section 112 for the first detection mechanism 61 to perform high-precision detection on the front of the second product. Synchronously, the second detection mechanism 62 adsorbs the first product and transports it to the second carrier 32 located on the second transfer section 311. The second carrier 32 moves to the second capping section 313, and the second capping mechanism 72 caps the second glass 723 on the second carrier 32. Then the second carrier 32 moves to the second detection section 312 for the second detection mechanism 62 to perform low-precision detection on the back of the first product.

[0048] S6: The second detection mechanism 62 finishes the low-precision detection on the back of the first product first. The second carrier 32 moves to the second capping section 313, and the second capping mechanism 72 removes the second glass 723. Then the second carrier 32 moves to the second transfer section 311. If both the front and back of the first product are detected as qualified, the second handling mechanism 5 transfers the first product on the second carrier 32 to the third adsorption table 26. The first handling mechanism 4 adsorbs the first product on the third adsorption table 26 and transfers it out of the first transfer section 111 to unload the first product.

[0049] S7: The first detection mechanism 61 finishes the high-precision detection on the front of the second product. The first carrier 12 moves to the first capping section 113, and the first capping mechanism 71 removes the first glass 713. Then the first carrier 12 moves to the first transfer section 111. If both the front and back of the second product are detected as qualified, the first handling mechanism 4 adsorbs the second product on the first carrier 12 and transfers it out of the first transfer section 111 to unload the second product.

[0050] The above are the detection steps when both products are qualified. If any side of the front or back of the two products is detected as unqualified, the product will be transported to the second carrier 32 and transferred out of the second transfer section 311 by the second handling mechanism 5 for product recycling. It should be noted that the qualified rate of products in the actual production process exceeds 90%, and the above detection is to recycle a small number of unqualified products.

[0051] The above solution detects two products synchronously, performs high-precision detection on the front of the products and low-precision detection on the back of the products. By reasonable path design and coordinating with the time difference of product front and back detection, the detection efficiency is greatly improved. Embodiment 2

[0052] As Figure 7As shown in the figure, the difference between this embodiment and Embodiment 1 is that the first sealing and pressing mechanism 71 is fixedly installed on the frame at the top of the first transfer section 111, and the second sealing and pressing mechanism 72 is fixedly installed on the frame at the top of the second transfer section 311. That is, the product is sealed and pressed on the first transfer section and the second transfer section 311.

[0053] The implementation principle of this embodiment: S1: The first handling mechanism 4 adsorbs the first product and transfers it to the first carrier 12 located on the first transfer section 111. At this time, the front side of the first product faces upward, and the first sealing and pressing mechanism 71 covers and presses the first glass 713 on the first carrier 12.

[0054] S2: The first carrier 12 moves from the first transfer section 111 to the first detection section 112. The first detection mechanism 61 performs high-precision detection on the front side of the first product located on the first detection section 112. Synchronously, the first handling mechanism 4 adsorbs the second product and transfers it to the third adsorption table 26, and the second handling mechanism 5 transfers the second product to the second carrier 32. At this time, the reverse side of the second product faces upward, and the second sealing and pressing mechanism 72 covers and presses the second glass 723 on the second carrier 32. The second carrier 32 moves to the second detection section 312, and the second detection mechanism 62 performs low-precision detection on the reverse side of the second product.

[0055] S3: The first detection mechanism 61 completes the high-precision detection of the front side of the first product. The first carrier 12 moves to the first transfer section 111, and the first sealing and pressing mechanism 71 removes the first glass 713. The first handling mechanism 4 adsorbs the first product and transfers it to the third adsorption table 26. Synchronously, the second detection mechanism 62 completes the low-precision detection of the reverse side of the second product. The second carrier 32 moves to the second transfer section 311, and the second sealing and pressing mechanism 72 removes the second glass 723. The second handling mechanism 5 adsorbs the second product and transfers it to the second adsorption table 25. Both the first adsorption table 24 and the third adsorption table 26 move towards the third adsorption table 26 to clamp the two products. The flipping mechanism 2 rotates 180 degrees, and the first adsorption table 24 and the third adsorption table 26 move in a direction away from the second adsorption table 25. At this time, the first adsorption table 24 is at the bottom and bears the second product, with the front side of the second product facing upward, and the second adsorption table 25 bears the first product, with the reverse side of the first product facing upward.

[0056] S4: The first detection mechanism 61 adsorbs the second product and transfers it to the first carrier 12 located on the first transfer section 111. The first capping and pressing mechanism 71 caps and presses the first glass 713 on the first carrier 12. The first carrier 12 moves to the first detection section 112 for the first detection mechanism 61 to perform high-precision detection on the front of the second product. Synchronously, the second detection mechanism 62 adsorbs the first product and transfers it to the second carrier 32 located on the second transfer section 311. The second capping and pressing mechanism 72 caps and presses the second glass 723 on the second carrier 32. The second carrier 32 moves to the second detection section 312 for the second detection mechanism 62 to perform low-precision detection on the back of the first product.

[0057] S5: The second detection mechanism 62 completes the low-precision detection on the back of the first product. The second carrier 32 moves to the second transfer section 311. The second capping and pressing mechanism 72 removes the second glass 723. If both the front and back of the first product are detected as qualified, the second handling mechanism 5 transfers the first product on the second carrier 32 to the third adsorption table 26. The first handling mechanism 4 adsorbs the first product on the third adsorption table 26 and transfers it out of the first transfer section 111 for discharging the first product.

[0058] S6: The first detection mechanism 61 completes the high-precision detection on the front of the second product. The first carrier 12 moves to the first transfer section 111. The first capping and pressing mechanism 71 removes the first glass 713. If both the front and back of the second product are detected as qualified, the first handling mechanism 4 adsorbs the second product on the first carrier 12 and transfers it out of the first transfer section 111 for discharging the second product.

[0059] In this embodiment, through path optimization, the transfer steps of the product are reduced, and the detection efficiency of the product is further improved.

[0060] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. An FPC appearance inspection device, characterized in that: include: A first conveying mechanism comprises a first guide rail and a first bearing platform sliding along the first guide rail; A second conveying mechanism comprises a second carrying platform and a second guide rail parallel to the first guide rail, the second carrying platform is slidably connected to the second guide rail, and the first carrying platform and the second carrying platform are both used for carrying products; A flipping mechanism, disposed between the first conveying mechanism and the second conveying mechanism, for flipping the front and back sides of the product; a first transport mechanism having at least a travel between the first conveying mechanism and the flipping mechanism to transfer the product; a second transport mechanism having at least a travel distance between the second conveying mechanism and the flipping mechanism to transfer the product; A first detection mechanism, disposed on the top of the first guide rail, for high-precision detection of the product on the first loading platform; The second detection mechanism is arranged on the top of the second guide rail and is used for low-precision detection of the product on the second loading platform.

2. The FPC appearance inspection device according to claim 1, characterized in that: The first guide rail includes a first transfer section and a first detection section, the second guide rail includes a second transfer section and a second detection section, and the first transfer section, the flip mechanism, and the second transfer section are sequentially arranged along the first direction; The FPC appearance inspection device comprises a support frame spanning the first guide rail and the second guide rail along a first direction, the first transfer section and the second transfer section are located on the same side of the support frame, and the first inspection section and the second inspection section are located on the other side of the support frame; The first conveying mechanism and the second conveying mechanism are fixedly arranged on the side of the support frame facing the first transfer section, and the first detection mechanism and the second detection mechanism are fixedly arranged on the side of the support frame facing the second transfer section.

3. The FPC appearance inspection device according to claim 2, characterized in that: The first transport mechanism includes a first drive assembly and a first bearing plate, and the second transport mechanism includes a second drive assembly and a second bearing plate, wherein the first drive assembly and the second drive assembly are fixedly arranged on the same side of the support frame, and both have translational freedom along the first direction and along the vertical direction; The travel range of the first drive component includes the flipping mechanism, the first transfer section, and the extension space of the first transfer section away from the flipping mechanism, so as to transfer or load and unload products. The travel range of the second drive component includes the flipping mechanism, the second transfer section, and the extension space of the first transfer section away from the flipping mechanism, so as to transfer products or recycle unqualified products.

4. The FPC appearance inspection device according to claim 2, characterized in that: The flipping mechanism includes a supporting frame and a flipping motor. The supporting frame is fixed to the output shaft of the flipping motor. The supporting frame is sequentially provided with a first adsorption platform, a second adsorption platform and a third adsorption platform. The first adsorption platform and the third adsorption platform move toward the second adsorption platform to clamp the product, so as to flip the front and back of two products at the same time.

5. The FPC appearance inspection device according to claim 2, characterized in that: The first detection mechanism includes a first transmission assembly and a first camera, wherein the first transmission assembly having a degree of freedom along a first direction is fixedly arranged on the support frame, the first camera is fixedly arranged at an output end of the first transmission assembly, the first transmission assembly drives the first camera to reciprocate along a first direction relative to the first detection section, and the first bearing platform performs unidirectional intermittent motion in the first detection section, for high-precision detection of the front of the product on the first bearing platform; The second detection mechanism includes a second transmission assembly and a second camera. The second transmission assembly having freedom along a first direction is fixed to the support frame, and the second camera is fixed to the output end of the second transmission assembly. The second transmission assembly drives the second camera to reciprocate along the first direction relative to the second detection section, and the second support platform moves unidirectionally intermittently in the second detection section for low-precision detection of the back of the product on the second support platform.

6. The FPC appearance inspection device according to claim 2, characterized in that: A first sealing and pressing mechanism is provided on the top of the first guide rail, and the first sealing and pressing mechanism includes a first bracket and a first glass, and the first bracket movably carries the first glass and moves it toward the first guide rail in a vertical direction, so as to cover or separate the first glass from the first bearing platform; A second sealing and pressing mechanism is provided on the top of the second guide rail. The second sealing and pressing mechanism includes a second bracket and a second glass. The second bracket movably carries the second glass and moves it toward the second guide rail in a vertical direction to cover or detach the second glass from the second supporting platform.

7. The FPC appearance inspection device according to claim 6, characterized in that: The first detection section has a first covering section extending in a direction away from the first transfer section, and the first sealing mechanism is located at the top of the first covering section. The second detection section has a second covering section extending in a direction away from the second transfer section, and the second sealing mechanism is located at the top of the second covering section.

8. The FPC appearance inspection device according to claim 6, characterized in that: The first sealing and pressing mechanism is located at the top of the first transfer section, and the second sealing and pressing mechanism is located at the top of the second transfer section.

9. A method for detecting the appearance of an FPC, characterized in that: The FPC appearance inspection device comprising any one of claims 1 to 8; the inspection method is as follows: In a first time period, the first product faces upward and arrives at the first loading platform; In the second time period, the first product arrives at the first detection section and the detection starts; at the same time, the second product, with its reverse side facing upward, arrives at the second loading platform; During the third time period, the second product arrives at the second detection section and the detection begins; In the fourth time period, the first product and the second product continue to perform the detection synchronously until the detection is completed; at this point, the high-precision detection time of the front side of the first product is the sum of the third time period and the fourth time period, and the low-precision detection time of the back side of the second product is the fourth time period; In the fifth time period, the first product and the second product are turned over synchronously, and the first product with the reverse side facing upward is transferred to the second detection section, and the second product with the front side facing upward is transferred to the first detection section; In the sixth time period, the first product and the second product are tested simultaneously, the low-precision test of the first product is completed first, and the material is removed; During the seventh time period, the high-precision inspection of the second product is completed and the material is removed; at this point, the low-precision inspection time for the back of the first product is the sixth time period, and the high-precision inspection time for the front of the second product is the sum of the sixth time period and the seventh time period.

10. The FPC appearance inspection method according to claim 9, characterized in that: S1: In a first time period, the first transport mechanism absorbs the first product and transfers it to the first loading platform located in the first transfer section, and the front side of the first product faces upward; S2: In the second time period, the first carrier moves from the first transfer section to the first pressing section, the first pressing mechanism presses the first glass on the first carrier, and then the first carrier moves to the first inspection section. Simultaneously, the first transport mechanism adsorbs the second product and transfers it to the third adsorption platform. The second transport mechanism transfers the second product located on the third adsorption platform to the second carrier located on the second transfer section, and the reverse side of the second product faces upward. S3: In the third time period, the first detection mechanism performs high-precision detection on the front side of the first product located in the first detection section, and synchronously, the second carrier drives the second product to move to the second covering section, the second covering section covers the second glass of the second product, the second carrier drives the second product to move to the second detection section, and the second detection mechanism performs low-precision detection on the back side of the second product located in the second detection section; S4: In the fourth time period, the first detection mechanism completes the high-precision detection of the front of the first product, the first carrier moves to the first covering and pressing section, the first sealing and pressing mechanism removes the first glass, the first carrier drives the first product to move to the first transfer section, and the first transport mechanism adsorbs the first product and transfers it to the third adsorption platform; Synchronously, the second detection mechanism completes the low-precision detection of the back of the second product, and then the second carrier moves to the second covering and pressing section, the second sealing and pressing mechanism removes the second glass, the second carrier drives the second product to move to the second transfer section, and the second transport mechanism adsorbs the second product and transfers it to the second adsorption platform; S5: In the fifth time period, the first adsorption platform and the third adsorption platform both move toward the third adsorption platform to clamp the two products, the flip mechanism rotates 180 degrees, and the first adsorption platform and the third adsorption platform move in a direction away from the second adsorption platform. At this time, the first adsorption platform is located at the bottom and carries the second product, and the second product faces up. The second adsorption platform carries the first product, and the first product faces up. The first inspection mechanism absorbs the second product and transfers it to the first carrying platform located in the first transfer section, the first carrying platform moves to the first covering and pressing section, the first sealing and pressing mechanism covers the first glass on the first carrying platform, and the first carrying platform moves to the first inspection section, so that the first inspection mechanism can perform high-precision inspection on the front of the second product; Synchronously, the second inspection mechanism absorbs the first product and transfers it to the second carrying platform located at the second transfer section, the second carrying platform moves to the second covering and pressing section, the second sealing and pressing mechanism covers the second glass on the second carrying platform, and the second carrying platform moves to the second inspection section, so that the second inspection mechanism can perform low-precision inspection on the reverse side of the first product; S6: In the sixth time period, the second detection mechanism completes the low-precision detection of the back of the first product, the second carrier moves to the second covering and pressing section, the second sealing and pressing mechanism removes the second glass, and then the second carrier moves to the second transfer section; If both the front and back of the first product are qualified, the second transport mechanism transfers the first product on the second carrier to the third adsorption platform, and the first transport mechanism adsorbs the first product on the third adsorption platform and transfers it out of the first transfer section to unload the first product; S7: In the seventh time period, the first inspection mechanism completes the high-precision inspection of the front side of the second product, the first carrier moves to the first covering and pressing section, the first sealing and pressing mechanism removes the first glass, and then the first carrier moves to the first transfer section; If both the front and back of the second product are tested to be qualified, the first transport mechanism absorbs the second product on the first carrying platform and transfers it out of the first transfer section to unload the second product; S8: When it is detected that any side of the two products is unqualified, the products are transferred out of the second transfer section through the second conveying component and the products are recovered.

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