FPC appearance detection equipment and technology thereof

Abstract

The invention relates to the field of detection equipment, and provides FPC appearance detection equipment and a process thereof.The detection equipment comprises a dust isolation box used for isolating static electricity and dust and externally provided with a controller, and the dust isolation box internally comprises a placement table, a to-be-detected table, a feeding manipulator, an extraction manipulator, a first detection piece, a second detection piece, a detection table and a discharging manipulator; the placing table is an initial storage point of a to-be-detected circuit board, and the to-be-detected table is arranged close to one side of the placing table; the feeding manipulator is positioned between the placing table and the to-be-detected table and is used for extracting a circuit board to the to-be-detected table; the detection table is located on the side, away from the placing table, of the to-be-detected table and is arranged at a preset interval. The method has the effect of accurately detecting the FPC.

Description

Technical Field

[0001] The present application relates to the field of testing equipment, and in particular to an FPC appearance testing equipment and process thereof. Background Art

[0002] FPC, also known as flexible printed circuit board, is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film as the base material.

[0003] When the FPC circuit board is produced, it is necessary to detect defects on the surface of the FPC circuit board to avoid scratches, gaps and other defects on the FPC circuit board that affect the use effect.

[0004] The traditional FPC circuit board inspection is to transport the FPC circuit board through the assembly line, and perform appearance inspection manually with auxiliary equipment during the transportation process. However, this method is prone to errors and the accuracy of appearance inspection is difficult to guarantee. Summary of the invention

[0005] In order to improve the above-mentioned problems, the present application provides an FPC appearance inspection device and a process thereof.

[0006] The present application provides an FPC appearance inspection device and process thereof using the following technical solutions: An FPC appearance inspection device, comprising a dustproof box for isolating static electricity and dust, and an external controller, wherein the dustproof box comprises a placement table, a test table, a feeding robot, an extraction robot, a first detection component, a second detection component, a test table and a discharging robot; the placement table is the initial storage point for the test circuit board, and the test table is arranged close to one side of the placement table; the feeding robot is located between the placement table and the test table, and extracts the circuit board to the test table; the test table is located on one side of the test table away from the placement table, and is arranged at a preset distance; an extraction robot is arranged above the test table, and the moving path of the extraction robot is determined by the test table. The extraction robot extracts the circuit board on the inspection table and moves it to the inspection table; the detection end of the first detection component provides bottom-up photo detection, and is arranged between the inspection table and the inspection table. When the circuit board extracted by the extraction robot moves to the first detection component, the bottom of the circuit board is photographed for detection; the second detection component is arranged above the inspection table, providing top-down photo detection; when the extraction robot places the circuit board on the inspection table, the second detection component takes a photo of the top of the circuit board; the discharging robot is located on one side of the inspection table, and extracts and discharges the inspected circuit board.

[0007] By adopting the above technical scheme, the feeding robot will separately extract several circuit boards on the placement table and place them on the inspection table. After the extraction robot extracts the circuit board from the inspection table, it moves toward the inspection table and stops when passing the first inspection piece during the movement. The first inspection piece takes a picture of the bottom of the circuit board being extracted from an upward perspective to obtain image information. Then the extraction robot transports the circuit board to the inspection table. A second inspection piece is provided on the top of the inspection table. The second inspection piece takes a picture of the top of the circuit board from a downward perspective to obtain image information. After obtaining the image information of the top surface and the top surface of the circuit board, the controller compares them to obtain the inspection result. The inspected circuit board is finally extracted by the discharging robot and leaves the dustproof box. The present application adopts an automatic loading and discharging method to take pictures of the front and back sides of the circuit board to obtain image information, thereby achieving efficient transportation and detecting defective products, thereby improving the yield rate.

[0008] Optionally, the inspection table, the inspection table, and the extraction robot are each provided with two groups to form two inspection groups; the first inspection member and the second inspection member each include a movable rail and a driving member, and the driving member drives the first inspection member or the second inspection member to move along the movable rail, and the moving path passes through the two inspection groups.

[0009] By adopting the above technical solution, the two detection groups can synchronously detect the two circuit boards, further improving the efficiency of detection and troubleshooting. At the same time, the driving member drives the first detection member or the second detection member to move along the movable rail, so that the two detection groups can be detected without setting up two sets of first detection members and second detection members, thereby improving the flexibility of detection.

[0010] Optionally, the first detection member and the second detection member are detected in staggered order.

[0011] By adopting the above technical solution, staggered detection is performed, that is, when the first detection member detects the bottom surface of the circuit board in one detection group, the second detection group detects the top surface of the circuit board in another group. This staggered method can make the detection allocation more reasonable and flexible.

[0012] Optionally, the extraction robot includes an extraction seat, a vacuum suction cup, a guide rail, a lifting member and an extraction drive unit; the guide rail is located above the inspection table and the inspection table; the extraction seat is slidably connected to the guide rail; the extraction drive unit is connected to the extraction seat and provides a drive for the extraction seat to move along the guide rail; the lifting member is installed on the extraction seat; the vacuum suction cup is connected to the lifting end of the lifting member.

[0013] By adopting the above technical solution, the vacuum suction cup generates vacuum suction to absorb the circuit board, and then the vacuum suction cup and the circuit board are lifted upward by the lifting member, so that the circuit board is separated from the inspection table, and the extraction drive unit drives the extraction seat to move along the guide rail, so that the lifting seat moves to the first inspection member or the inspection table, thereby completing the transportation of the circuit board.

[0014] Optionally, the vacuum suction cup is further provided with a suction cup seat; a clamping groove is provided on the suction cup seat, and two sets of clamping mechanisms are provided in the clamping groove.

[0015] By adopting the above technical solution, two sets of clamping mechanisms are used to provide relative force for clamping, and the vacuum suction cup is used to improve the stability during the process of extracting the circuit board and moving it.

[0016] Optionally, the clamping mechanism includes a clamping portion, a first elastic portion, a second elastic portion, a telescopic portion, an ejection portion and a sliding portion; a hidden cavity is also provided on the suction cup seat; a connecting port is provided between the hidden cavity and the clamping groove, a telescopic groove is provided on the wall surface close to the vacuum suction cup, and an ejection port is provided on the wall surface away from the telescopic groove; the sliding portion is slidably connected to the hidden cavity, and the sliding portion is wedge-shaped on the side close to the clamping groove; the telescopic portion is connected to the sliding portion, and passes through the connecting port to the The clamping portion is located in the clamping groove and is connected to the telescopic portion; the ejection portion passes through the ejection outlet and the hidden cavity, extends into the telescopic groove, and is provided with an ejection protrusion that contacts the wedge-shaped surface of the sliding portion; the first elastic portion is located in the hidden cavity, and one end is connected to the sliding portion, and the other end is connected to a side surface of the hidden cavity away from the connecting port; the second elastic portion is located in the telescopic groove, and one end is connected to the ejection portion, and the other end is connected to the groove wall of the telescopic groove.

[0017] By adopting the above technical scheme, the ejection part is affected by the elastic force and extends out of the ejection outlet. When the vacuum suction cup and the suction cup seat are lowered to the inspection table, the ejection part contacts the inspection table and is pushed into the telescopic groove. The ejection protrusion synchronously pushes the sliding part to move away from the clamping groove through the wedge-shaped surface of the sliding part. When the sliding part moves, the clamping part is driven to move toward the hidden cavity through the telescopic part, so that the two sets of clamping parts are opened at the same time. When the suction cup seat completes the bonding with the inspection table, the circuit board is located at the notch of the clamping groove. Then the vacuum suction cup generates suction to suck the circuit board into the clamping groove, and the lifting member drives the vacuum suction cup and the suction cup seat to rise. During the rising process, the ejection part is affected by the elasticity and extends out of the ejection outlet. The sliding part is reset under the elastic force of the first elastic part, so that the clamping part moves toward the circuit board through the pushing action of the telescopic part, so that the two clamping parts synchronously clamp the two sides of the circuit board, thereby providing a clamping and fixing effect, and synchronously cooperates with the vacuum suction cup for auxiliary fixation to prevent the circuit board from falling.

[0018] Optionally, a clamping groove is provided on a side of the clamping portion away from the connecting port, and protective cotton is provided in the clamping groove.

[0019] By adopting the above technical solution, the card slot can be inserted into the edge of a part of the circuit board, thereby improving the stability of the circuit board when it is clamped, and the protective cotton can play a protective role to prevent the circuit board from being damaged due to excessive clamping force.

[0020] Optionally, a pressure sensor is provided in the telescopic groove, the pressure sensor is in contact with the ejection portion, and the pressure sensor is electrically connected to the vacuum suction cup switch.

[0021] By adopting the above technical solution, the vacuum suction cup is opened or closed by utilizing the pressure sensor in cooperation with the telescopic effect of the ejection part. This method can facilitate the opening and closing of the vacuum suction cup without the need for a controller to control it.

[0022] Optionally, the ejection portion extends out of one end of the ejection outlet, and is obliquely provided with a fill-light portion, wherein a fill-light direction of the fill-light portion faces toward the clamping groove.

[0023] By adopting the above technical solution, the fill light part can provide a fill light effect for the circuit board when the first detection component is taking photos for detection. The inclined setting can enable light to irradiate the circuit board, making the image taken by the first detection component clearer and more complete.

[0024] An FPC appearance inspection process includes the following steps: Circuit board conveying: The feeding robot takes out the circuit board from the placement table separately and places it on any test table; Staggered extraction: Two groups of extraction manipulators stagger the extraction of circuit boards; Image acquisition: the first detection component acquires the image information of the bottom surface of the circuit board, and the second detection component detects the image information of the top surface of the circuit board, and sends the image information to the controller; Image processing: The controller compares the complete PCB image with the captured image of the PCB to be tested and extracts the defect features; Image recording: A separate QR code is set on the circuit board. Scan the QR code of the circuit board to record the defect characteristics in the controller system, and a second retest can be performed; Defective product rejection: All inspected circuit boards are transported and passed through the QR code rejection area. The QR code on the circuit board is scanned. The system records the defect feature information of the circuit board corresponding to the QR code. Defective products are automatically ejected and rejected.

[0025] By adopting the above technical solution, the appearance defect detection of FPC circuit boards can be conveniently carried out. At the same time, the staggered detection method can speed up the detection efficiency, and QR code scanning can enter the defect characteristics into the system for subsequent elimination.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. After the extraction robot extracts the circuit board from the inspection table, it moves to the inspection table. During the movement, it stops when passing the first inspection component. The first inspection component takes a picture of the bottom of the circuit board being extracted from an upward perspective to obtain image information. Then the extraction robot conveys the circuit board to the inspection table. A second inspection component is provided on the top of the inspection table. The second inspection component takes a picture of the top of the circuit board from a downward perspective to obtain image information. After obtaining the image information of the top surface and the top surface of the circuit board, the inspection result is obtained by comparison. The inspected circuit board is finally extracted by the discharging robot and leaves the dust isolation box. This application adopts an automatic loading and discharging method to take pictures of the front and back sides of the circuit board to obtain image information, so as to achieve high-efficiency transportation and detect defective products at the same time, thereby improving the yield rate. 2. The two detection groups can detect two circuit boards simultaneously, further improving the efficiency of detection and troubleshooting. At the same time, the driving member drives the first detection member or the second detection member to move along the moving rail, so that the two detection groups can be detected without setting two sets of first detection members and second detection members, thereby improving the flexibility of detection; 3. Staggered detection: when the first detection unit detects the bottom surface of the circuit board in one detection group, the second detection group detects the top surface of the circuit board in another detection group. This staggered method can make the detection allocation more reasonable and flexible; 4. The vacuum suction cup generates vacuum suction to absorb the circuit board, and then the lifting member lifts the vacuum suction cup and the circuit board upward, so that the circuit board is separated from the inspection table. The extraction drive unit drives the extraction seat to move along the guide rail, so that the lifting seat moves to the first inspection member or the inspection table, thereby completing the transportation of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of a first-view stereoscopic structure of a detection device in some embodiments of the present application; Figure 2 is a schematic diagram of a second perspective stereoscopic structure of a detection device in some embodiments of the present application; Figure 3 is a schematic diagram of the three-dimensional structure of the first detection member in some embodiments of the present application; Figure 4 is a schematic diagram of the three-dimensional structure of an extraction robot in some embodiments of the present application; Figure 5 is a schematic diagram of the three-dimensional structure of the suction cup seat in some embodiments of the present application; Figure 6 This application Figure 5 A is a schematic diagram of the enlarged structure of the middle part; Figure 7 is a schematic diagram of the three-dimensional structure of the sliding part and the ejecting part in some embodiments of the present application; The marks in the attached drawings are: 1. dustproof box, 2. placement table, 3. inspection table, 4. feeding manipulator, 5. extraction manipulator, 51. extraction seat, 52. vacuum suction cup, 53. guide rail, 54. lifting member, 55. extraction drive unit, 56. suction cup seat, 561. clamping groove, 562. hidden cavity, 563. connecting port, 564. telescopic slot, 565. top outlet, 57. clamping mechanism, 571. clamp Tightening part, 5711, card slot, 5712, protective cotton, 572, first elastic part, 573, second elastic part, 574, telescopic part, 575, ejection part, 5751, ejection protrusion, 576, sliding part, 577, pressure sensor, 578, fill light part, 6, first detection part, 61, moving rail, 62, driving part, 7, second detection part, 8, detection table, 9, discharge robot, 10, controller. DETAILED DESCRIPTION

[0028] The following is an explanation of the implementation of the present application by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the information disclosed in the present application. The present application can also be implemented or applied through other different specific implementations, and the details in the present application can also be modified or changed in various ways according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0029] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in a variety of different forms and is not limited to the embodiments described herein.

[0030] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics represented may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they are contradictory.

[0031] In addition, the terms "first" and "second" are only used to indicate the target, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0033] The following is combined with Figure 1 -Attached Figure 7 , further details of this application are given.

[0034] The embodiment of the present application discloses an FPC appearance inspection device and a process thereof.

[0035] An FPC appearance inspection device is used for the appearance inspection of FPC circuit boards. It performs appearance inspection on the FPC circuit board product to be inspected and compares it with the normal FPC circuit board to determine whether there are defects on the product surface, such as scratches, dirt, broken wires, etc. The FPC circuit board is referred to as the circuit board below.

[0036] refer to Figure 1 and Figure 2 As shown, it includes a dustproof box 1 for isolating static electricity and dust. A plurality of observation windows are provided on the dustproof box 1. The observation windows are provided with transparent glass to provide dust protection. A controller 10 can be arranged outside the dustproof box 1. The controller 10 can control the operation of the appearance detection equipment and can view the image information during the appearance detection.

[0037] The dustproof box 1 includes a placement table 2, an inspection table 3, a feeding robot 4, an extraction robot 5, a first inspection component 6, a second inspection component 7, an inspection table 8 and a discharging robot 9; the placement table 2 is the initial storage point for the circuit boards to be inspected, and an external conveyor belt can be connected to move the placement tray with the circuit boards to the placement table 2, or the placement device with the circuit boards can be manually placed on the placement table 2, and the inspection table 3 is arranged close to one side of the placement table 2, and the placement table 2 is used to store the circuit boards to be inspected in a unified manner, and the inspection table 3 is used to store the circuit boards to be inspected separately.

[0038] The feeding robot 4 is located between the placement table 2 and the inspection table 3, and extracts the circuit board to the inspection table 3. The feeding robot 4 takes out any circuit board from the placement table 2 and places it on the inspection table 3 for individual inspection, avoiding confusion in the order and position of the circuit boards during inspection and preventing misjudgment.

[0039] The testing table 8 is set at a preset distance on the side of the test table 3 away from the placement table 2. The preset distance is determined according to the size of the dustproof box 1 and can be a distance of 1m, 2m, etc. The specific preset distance is not limited here. The function of the testing table 8 is to provide a storage point for the circuit board during the testing process.

[0040] An extraction robot 5 is provided above the inspection table 3, and the moving path of the extraction robot 5 is from the inspection table 3 to the inspection table 8. The extraction robot 5 can extract the circuit board on the inspection table 3 and transport it to the inspection table 8. During the extraction process, the circuit board is subjected to appearance or visual inspection.

[0041] The detection end of the first detection member 6 provides bottom-up photographic detection and is arranged between the inspection table 3 and the detection table 8. When the circuit board extracted by the extraction robot 5 moves to the first detection member 6, the extraction robot 5 stops, and the first detection member 6 takes a photographic detection on the bottom of the circuit board from an upward angle from the bottom to obtain image information or image data of the bottom surface of the circuit board.

[0042] The second inspection member 7 is arranged above the inspection table 8 to provide top-down photographic inspection. When the extraction robot 5 places the circuit board on the inspection table 8, the second inspection member 7 takes a photographic inspection of the top of the circuit board in a top-down direction to obtain image information or image data of the top surface of the circuit board.

[0043] Both the first detection component 6 and the second detection component 7 can adopt CCD industrial cameras for detection, and can have their own flash. After the first detection component 6 and the second detection component 7 respectively obtain the image information or image data of the bottom surface and the top surface of the circuit board, they are transmitted to the controller 10 outside the dustproof box 1 through the circuit or electrical signal. The controller 10 performs image comparison or data comparison on the image information of the circuit board and the image of the complete circuit board to obtain the result of appearance inspection and judge whether there are defects in the circuit board.

[0044] The unloading robot 9 is located on one side of the inspection table 8, and extracts the circuit boards that have been inspected by the first inspection piece 6 and the second inspection piece 7 and then unloads them. They can be placed on a placing device such as a placing tray outside the dustproof box 1, or on an external conveyor belt. The extraction methods of the feeding robot 4 and the extraction robot 5 can both be vacuum suction extraction methods.

[0045] Specifically, the feeding robot 4 extracts several circuit boards on the placement table 2 separately and places them on the inspection table 3. After the extraction robot 5 extracts the circuit board from the inspection table 3, it moves to the inspection table 8. During the movement, it stops when passing the first inspection component 6. The first inspection component 6 takes a picture of the bottom of the circuit board being extracted from an upward perspective to obtain image information. Then the extraction robot 5 transports the circuit board to the inspection table 8. A second inspection component 7 is provided on the top of the inspection table 8. The second inspection component 7 takes a picture of the top of the circuit board from a downward perspective to obtain image information. After obtaining the image information of the top surface and the top surface of the circuit board, the controller 10 compares them to obtain the inspection result. The inspected circuit board is finally extracted and left the dustproof box 1 by the discharging robot 9. The present application adopts an automatic loading and discharging method to take pictures of the front and back sides of the circuit board to obtain image information, thereby achieving efficient transportation while detecting defective products and improving the yield rate.

[0046] Among them, both the inspection table 3 and the inspection table 8 can be provided with an embedding groove similar to the pattern of the circuit board to ensure the accurate position during extraction.

[0047] In some embodiments, reference Figure 1 and Figure 2 As shown, the inspection table 3, the inspection table 8, and the extraction robot 5 are each provided with two groups, forming two inspection groups. The two inspection groups can simultaneously inspect two circuit boards, further improving the efficiency of inspection and troubleshooting.

[0048] refer to Figure 3 As shown, the first detection member 6 and the second detection member 7 both include a movable rail 61 and a driving member 62. The driving member 62 can adopt a chain belt structure or a screw structure and is driven by a driving motor. The driving member 62 drives the first detection member 6 or the second detection member 7 to move along the movable rail 61, and the moving path passes through two groups of detection groups, so that the first detection member 6 or the second detection member 7 can be moved to the two groups of detection groups for detection respectively, without setting two groups of first detection and second detection members 7, thereby improving the flexibility of detection.

[0049] Taking the first detection member 6 as an example in the figure, the first detection member 6 is located below the test platform 3 , and the moving rail 61 and the driving member 62 of the second detection member 7 are located above the test platform 8 .

[0050] The movable rail 61 can be set to move horizontally and vertically, so that the driving member 62 can adjust the position of the first detecting member 6 (not shown in the figure).

[0051] Furthermore, the first detection member 6 and the second detection member 7 are staggered for detection. The staggered detection means that when the first detection member 6 is detecting the bottom surface of the circuit board in one detection group, the second detection group is detecting the top surface of the circuit board in the other group. This staggered method can make the detection allocation more reasonable and flexible, and there is no need to wait for the top and bottom surfaces of the circuit board of one detection group to be fully detected before moving to the other detection group to detect the circuit board.

[0052] In some embodiments, reference Figure 4 As shown, the extraction robot 5 includes an extraction seat 51, a vacuum suction cup 52, a guide rail 53, a lifting member 54 and an extraction drive unit 55; the guide rail 53 is connected to the side wall of the dustproof box 1, and is located above the inspection table 3 and the inspection table 8, the extraction seat 51 is slidably connected to the guide rail 53, the extraction drive unit 55 is connected to the extraction seat 51, and provides a drive for the extraction seat 51 to move along the guide rail 53, the extraction drive unit 55 can adopt a chain belt structure or a screw structure, and is provided with a drive motor for driving.

[0053] The lifting member 54 is installed on the extraction seat 51. The lifting member 54 can adopt driving elements such as electric push rods and cylinders, and can also adopt a motor and screw structure. The vacuum suction cup 52 is connected to the lifting end of the lifting member 54. The vacuum suction cup 52 generates vacuum suction to absorb the circuit board. The lifting member 54 then lifts the vacuum suction cup 52 and the circuit board upward, so that the circuit board is separated from the inspection table 3. The extraction drive unit 55 drives the extraction seat 51 to move along the guide rail 53, so that the lifting seat moves to the first inspection member 6 or the inspection table 8, thereby completing the transportation of the circuit board.

[0054] When moving to the first detection member 6, the extraction driving unit 55 stops driving. The first detection member 6 is located below the extraction seat 51, so the bottom surface of the circuit board is photographed at an upward angle to obtain image information.

[0055] After the photo is taken, the extraction drive unit 55 continues to drive the extraction seat 51, so that the extraction seat 51 continues to move to the testing table 8, and the lifting member 54 drives the vacuum suction cup 52 to descend to the testing table 8, and the vacuum suction cup 52 stops suction, so that the circuit board can be stably placed on the testing table 8.

[0056] In some embodiments, reference Figure 4 As shown, the vacuum suction cup 52 is also provided with a suction cup seat 56, and a clamping groove 561 is opened on the suction cup seat 56. Two sets of clamping mechanisms 57 are arranged in the clamping groove 561. The clamping mechanism 57 can clamp the circuit board to provide a fixing effect in addition to the vacuum suction cup 52, so as to prevent the vacuum suction cup 52 from loosening during use, causing the circuit board to fall from the suction cup seat 56 or the vacuum suction cup 52. The two sets of clamping mechanisms 57 are used to provide relative force for clamping, and cooperate with the vacuum suction cup 52 to improve the stability during the process of extracting the circuit board and moving it.

[0057] For further reference, Figure 5 and Figure 6 As shown, the clamping mechanism 57 includes a clamping portion 571, a first elastic portion 572, a second elastic portion 573, a telescopic portion 574, an ejection portion 575 and a sliding portion 576; a hidden cavity 562 is also provided on the suction cup seat 56. Since the clamping mechanism 57 is provided with two groups, two hidden cavities 562 are also provided, which are respectively located on both sides of the clamping groove 561. A connecting port 563 is provided between the hidden cavity 562 and the clamping groove 561, a telescopic groove 564 is provided on the wall surface close to the vacuum suction cup 52, and an ejection port 565 is provided on the wall surface away from the telescopic groove 564.

[0058] refer to Figure 6 and Figure 7 As shown, the sliding portion 576 is slidably connected to the hidden cavity 562, and the sliding portion 576 has a wedge-shaped surface on one side close to the clamping groove 561. The sliding portion 576 can adopt a sliding block, and the style of the sliding block matches the wall surface of the hidden cavity 562, so the sliding block can slide against the inner wall of the hidden cavity 562, and a through opening is also opened at the wedge-shaped surface of the sliding block.

[0059] The telescopic portion 574 is connected to the sliding portion 576 and extends through the connecting port 563 into the clamping groove 561. The telescopic portion 574 can adopt a telescopic rod, which fits with the connecting port 563 and can extend out of the hidden cavity 562 or into the hidden cavity 562 along the connecting port 563. The clamping portion 571 is located in the clamping groove 561 and is connected to the telescopic portion 574. When the telescopic portion 574 moves, it can drive the clamping portion 571 to move. The clamping portion 571 can adopt a clamping plate, and the height of the clamping plate is less than the depth of the clamping groove 561, so that the clamping plate will not extend out of the notch of the clamping groove 561.

[0060] The ejection portion 575 passes through the ejection outlet 565 and the hidden cavity 562, extends into the telescopic groove 564, and is provided with an ejection protrusion 5751 that contacts the wedge-shaped surface of the sliding portion 576. The ejection portion 575 can adopt an ejection rod. When the ejection rod extends into the hidden cavity 562, the wedge-shaped surface of the sliding portion 576 is pushed by the ejection protrusion 5751, so that it passes through the through-opening of the sliding portion 576 and then enters the telescopic groove 564. The ejection protrusion 5751 can be provided with a wedge-shaped surface opposite to the wedge-shaped surface of the sliding portion 576, or a circular arc structure can be adopted. The ejection protrusion 5751 can limit the ejection portion 575, so that the ejection portion 575 cannot be separated from the telescopic groove 564 and the ejection outlet 565.

[0061] The first elastic portion 572 is located in the hidden cavity 562, and one end of it is connected to the sliding portion 576, and the other end is connected to a side of the hidden cavity 562 away from the connecting port 563. The second elastic portion 573 is located in the telescopic groove 564, and one end of it is connected to the ejection portion 575, and the other end is connected to the groove wall of the telescopic groove 564. The first elastic portion 572 and the second elastic portion 573 can both adopt springs. The first elastic portion 572 applies an elastic force to the sliding portion 576 toward the clamping portion 571, and the second elastic portion 573 applies an elastic force to the ejection portion 575 toward the ejection port 565, so that the ejection portion 575 and the sliding portion 576 can be reset under the influence of the elastic force.

[0062] Specifically, the ejection portion 575 is extended out of the ejection outlet 565 under the elastic force of the second elastic portion 573. When the vacuum suction cup 52 and the suction cup seat 56 are lowered to the inspection table 3, the ejection portion 575 contacts the inspection table 3 and is pushed into the telescopic groove 564. The ejection protrusion 5751 synchronously pushes the sliding portion 576 to move away from the clamping groove 561 through the wedge-shaped surface of the sliding portion 576. When the sliding portion 576 moves, it drives the clamping portion 571 to move toward the hidden cavity 562 through the telescopic portion 574, so that the two sets of clamping portions 571 are opened at the same time. When the suction cup seat 56 is completely attached to the inspection table 3, the circuit The board is located at the notch of the clamping groove 561, and then the vacuum suction cup 52 generates suction to suck the circuit board into the clamping groove 561, and the lifting member 54 drives the vacuum suction cup 52 and the suction cup seat 56 to rise. During the rising process, the ejection portion 575 is elastically affected and extends out of the ejection outlet 565, and the sliding portion 576 is reset by the elastic force of the first elastic portion 572, so that the clamping portion 571 moves toward the circuit board through the pushing action of the telescopic portion 574, so that the two clamping portions 571 simultaneously clamp the two sides of the circuit board, thereby providing a clamping and fixing effect, and synchronously cooperates with the vacuum suction cup 52 for auxiliary fixation to prevent the circuit board from falling.

[0063] After the circuit board is fixed by the two sets of clamping components, an attempt can be made to close the vacuum suction cup 52 to reduce power loss.

[0064] When the clamping mechanism 57 is provided, the embedding groove may not be provided on the inspection table 3 , so that when the suction cup seat 56 descends to the inspection table 3 , the circuit board can stably enter the clamping groove 561 .

[0065] For further reference, Figure 6 As shown, a card slot 5711 is provided on the side of the clamping portion 571 away from the connecting port 563, and a protective cotton 5712 is provided in the card slot 5711. The width of the card slot 5711 can be consistent with the thickness of the circuit board or slightly larger than the thickness of the circuit board, so that the edge of the circuit board can be inserted therein, thereby improving the stability of the circuit board when it is clamped. The protective cotton 5712 can play a protective role to prevent the circuit board from being damaged by excessive clamping force.

[0066] Among them, a sliding groove can be opened on the inner wall of the clamping groove 561, and a limiting protrusion can be set on the clamping part 571. The limiting protrusion is slidably connected with the sliding groove, so that the moving path of the clamping part 571 is fixed, which can avoid the position displacement of the clamping part 571 during clamping, and also ensure that the circuit board and the card slot 5711 can be stably connected.

[0067] In some embodiments, reference Figure 6 As shown, a pressure sensor 577 is provided in the telescopic groove 564. When the ejection portion 575 extends into the telescopic groove 564, the pressure sensor 577 contacts the ejection portion 575. When the ejection portion 575 extends out of the ejection outlet 565, the ejection portion 575 and the pressure sensor 577 are not in contact or are separated. The pressure sensor 577 is electrically connected to the switch of the vacuum suction cup 52. The electrical connection can be a circuit connection or an electrical signal connection. The pressure sensor 577 can be a pressure sensor. The pressure sensor is electrically connected to the switch of the vacuum suction cup 52. The pressure sensor 577 can send an opening or closing instruction to the vacuum suction cup 52. The pressure sensor 577 can be used to control the switch of the vacuum suction cup 52 to achieve the effect of cooperating with the opening of the vacuum suction cup 52.

[0068] After the suction cup seat 56 is in contact with the test table, the ejection portion 575 extends into the telescopic groove 564 and presses down the pressure sensor 577, so that the pressure sensor 577 is pressed and then opens the vacuum suction cup 52 through the electrical connection, and the vacuum suction cup 52 can generate suction to adsorb the circuit board. When the suction cup seat 56 descends to be in contact with the test table 8, the ejection portion 575 extends into the telescopic groove 564 and presses down the pressure sensor 577, and then the pressure sensor 577 is pressed and then closes the vacuum suction cup 52 through the electrical connection, so that the vacuum suction cup 52 is closed, and the circuit board that has lost its suction can fall from the clamping groove 561.

[0069] The vacuum suction cup 52 is opened or closed by using the pressure sensor 577 in cooperation with the extension and retraction of the ejection portion 575 . This method can facilitate the opening and closing of the vacuum suction cup 52 without the need for control by the controller 10 .

[0070] In some embodiments, reference Figure 7 As shown, the ejection portion 575 extends out of one end of the ejection outlet 565, and is obliquely provided with a fill-in light portion 578, the fill-in light direction of the fill-in light portion 578 is toward the clamping groove 561, and the fill-in light portion 578 can be embedded in the ejection portion 575, and the extension and retraction of the ejection portion 575 is not hindered.

[0071] The fill light part 578 can use a fill light, which can provide a fill light effect for the circuit board when the first detection component 6 takes pictures for detection. The inclined setting can enable the light to irradiate the circuit board.

[0072] Among them, the switch of the fill light part 578 can be electrically connected to the pressure sensor 577, similar to the switch of the vacuum suction cup 52. When the ejection part 575 is located at the inspection table 3 and presses the pressure sensor 577, the fill light and the vacuum suction cup 52 are turned on. When the ejection part 575 is pressed at the inspection table 8, the fill light part 578 and the vacuum suction cup 52 are closed. The fill light time of the fill light part 578 can be reasonably adjusted to reduce power loss.

[0073] The present application also provides an FPC appearance inspection process, which is applied to the appearance inspection device in the above embodiment, and includes the following steps: S100, circuit board conveying: the feeding robot 4 takes out the circuit board from the placement table 2 separately and places it on any test table.

[0074] S200, staggered extraction: two groups of extraction manipulators 5 extract circuit boards in a staggered manner.

[0075] Among them, staggered extraction of circuit boards can enable one group of circuit boards to be inspected by the first inspection member 6 and another group of circuit boards to be inspected by the second inspection member 7. Staggered inspection can reasonably allocate inspection time to improve inspection efficiency.

[0076] S300 , image acquisition: the first detection component 6 acquires image information of the bottom surface of the circuit board, and the second detection component 7 detects image information of the top surface of the circuit board, and sends the image information to the controller 10 .

[0077] S400, image processing: the controller 10 compares the complete circuit board image with the photographed image of the circuit board to be tested, and extracts defect features, such as perforation, crushing, ridges and missing parts.

[0078] S500, image recording: A separate QR code is provided on the circuit board. The QR code of the circuit board is scanned to record the defect characteristics in the controller 10 system, and a second retest can be performed to avoid misjudgment.

[0079] The QR code can be entered manually and retested. The circuit board is scanned manually using a QR code scanner, and the defect features of the circuit board are entered after scanning for easy recording and subsequent elimination.

[0080] S600, reject defective products: All inspected circuit boards are transported and passed through the QR code rejection area. The QR code on the circuit board is scanned. The system records the defect feature information of the circuit board corresponding to the QR code. Defective products are automatically ejected and rejected.

[0081] Through the above-mentioned FPC appearance inspection process, the FPC circuit board can be easily inspected for appearance defects. At the same time, the staggered inspection method can speed up the inspection efficiency, and the QR code scanning can enter the defect characteristics into the system for subsequent elimination.

[0082] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An FPC appearance inspection device, comprising a dust isolation box (1) for isolating static electricity and dust, and an external controller (10), characterized in that: The dustproof box (1) comprises a placement table (2), a test table (3), a feeding robot (4), an extraction robot (5), a first detection component (6), a second detection component (7), a test table (8) and a discharge robot (9); the placement table (2) is an initial storage point for the circuit boards to be tested, and the test table (3) is arranged close to one side of the placement table (2); the feeding robot (4) is located between the placement table (2) and the test table (3), and extracts the circuit boards onto the test table (3); the test table (8) is located on one side of the test table (3) away from the placement table (2), and is arranged at a preset distance; an extraction robot (5) is arranged above the test table (3), and the moving path of the extraction robot (5) is from the test table (3) to the extraction robot (5). The invention relates to a testing platform (8), wherein the extraction robot (5) extracts the circuit board on the testing platform (3) and moves it to the testing platform (8); the detection end of the first detection member (6) provides bottom-up photographic detection and is arranged between the testing platform (3) and the testing platform (8); when the circuit board extracted by the extraction robot (5) moves to the first detection member (6), the bottom of the circuit board is photographed for detection; the second detection member (7) is arranged above the testing platform (8) and provides top-down photographic detection; when the extraction robot (5) places the circuit board on the testing platform (8), the second detection member (7) takes a photo of the top of the circuit board for detection; the discharging robot (9) is located on one side of the testing platform (8) and extracts and discharges the circuit board after detection.

2. The FPC appearance inspection device according to claim 1, characterized in that: The inspection table (3), the inspection table (8), and the extraction robot (5) are each provided with two groups, forming two inspection groups; the first inspection member (6) and the second inspection member (7) each comprise a movable rail (61) and a driving member (62); the driving member (62) drives the first inspection member (6) or the second inspection member (7) to move along the movable rail (61), and the moving path passes through the two inspection groups.

3. The FPC appearance inspection device according to claim 2, characterized in that: The first detection member (6) and the second detection member (7) are staggered in detection.

4. The FPC appearance inspection device according to claim 1 or 3, characterized in that: The extraction robot (5) comprises an extraction seat (51), a vacuum suction cup (52), a guide rail (53), a lifting member (54) and an extraction drive unit (55); the guide rail (53) is located above the inspection table (3) and the inspection table (8); the extraction seat (51) is slidably connected to the guide rail (53); the extraction drive unit (55) is connected to the extraction seat (51) and provides a drive for the extraction seat (51) to move along the guide rail (53); the lifting member (54) is installed on the extraction seat (51); and the vacuum suction cup (52) is connected to the lifting end of the lifting member (54).

5. The FPC appearance inspection device according to claim 4, characterized in that: The vacuum suction cup (52) is further provided with a suction cup seat (56); a clamping groove (561) is provided on the suction cup seat (56), and two groups of clamping mechanisms (57) are provided in the clamping groove (561).

6. The FPC appearance inspection device according to claim 5, characterized in that: The clamping mechanism (57) comprises a clamping portion (571), a first elastic portion (572), a second elastic portion (573), a telescopic portion (574), an ejection portion (575) and a sliding portion (576); a hidden cavity (562) is also provided on the suction cup seat (56); a connecting port (563) is provided between the hidden cavity (562) and the clamping groove (561); a telescopic groove (564) is provided on the wall surface close to the vacuum suction cup (52); and an ejection port (565) is provided on the wall surface away from the telescopic groove (564); the sliding portion (576) is slidably connected to the hidden cavity (562), and the side of the sliding portion (576) close to the clamping groove (561) is a wedge-shaped surface; the telescopic portion (574) is connected to the sliding portion (576) and passes through the connecting port (563). 63) extends into the clamping groove (561); the clamping portion (571) is located in the clamping groove (561) and is connected to the telescopic portion (574); the ejection portion (575) passes through the ejection outlet (565) and the hidden cavity (562), extends into the telescopic groove (564), and is provided with an ejection protrusion (5751) that contacts the wedge-shaped surface of the sliding portion (576); the first elastic portion (572) is located in the hidden cavity (562), and one end is connected to the sliding portion (576), and the other end is connected to a side surface of the hidden cavity (562) away from the connecting port (563); the second elastic portion (573) is located in the telescopic groove (564), and one end is connected to the ejection portion (575), and the other end is connected to the groove wall of the telescopic groove (564).

7. The FPC appearance inspection device according to claim 6, characterized in that: A clamping groove (5711) is provided on a side of the clamping portion (571) away from the communication port (563), and a protective cotton (5712) is provided in the clamping groove (5711).

8. The FPC appearance inspection device according to claim 6, characterized in that: A pressure sensor (577) is provided in the telescopic groove (564), the pressure sensor (577) is in contact with the ejection portion (575), and the pressure sensor (577) is electrically connected to the switch of the vacuum suction cup (52).

9. The FPC appearance inspection device according to claim 6, characterized in that: The ejection portion (575) extends out of one end of the ejection outlet (565), and is provided with a fill-in light portion (578) at an angle, wherein the fill-in light direction of the fill-in light portion (578) faces toward the clamping groove (561).

10. A FPC appearance inspection process, characterized in that: The FPC appearance inspection device applied to any one of claims 1 to 9 comprises the following steps: Circuit board conveying: the feeding robot (4) takes out the circuit board from the placement table (2) individually and places it on any test table; Staggered extraction: two groups of extraction manipulators (5) staggeredly extract the circuit boards; Image acquisition: the first detection element (6) acquires image information of the bottom surface of the circuit board, and the second detection element (7) detects image information of the top surface of the circuit board, and sends the image information to the controller (10); Image processing: the controller (10) compares the complete circuit board image with the captured image of the circuit board to be tested, and extracts defect features; Image recording: A separate QR code is provided on the circuit board. The QR code of the circuit board is scanned to record the defect characteristics in the controller (10) system, and a second retest can be performed; Defective product rejection: All inspected circuit boards are transported and passed through the QR code rejection area. The QR code on the circuit board is scanned. The system records the defect feature information of the circuit board corresponding to the QR code. Defective products are automatically ejected and rejected.

Images