An FPC Appearance Detection Device and Its Process

Abstract

This application relates to the field of detection equipment, and provides an FPC appearance detection equipment and its process. Among them, the detection equipment includes a dust isolation box for isolating static electricity and dust, and is externally provided with a controller. The dust isolation box includes a placement table, a to-be-inspected table, a feeding manipulator, an extraction manipulator, a first detection piece, a second detection piece, a detection table, and a discharging manipulator; the placement table is the initial storage point of the circuit board to be inspected, and the to-be-inspected table is arranged on one side close to the placement table; the feeding manipulator is located between the placement table and the to-be-inspected table, and extracts the circuit board onto the to-be-inspected table; the detection table is located on the side of the to-be-inspected table away from the placement table and is arranged at a preset distance. This application has the effect of accurately detecting FPCs.

Description

Technical Field

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

[0002] FPC is also a flexible circuit board, which is a highly reliable and excellent flexible printed circuit board made of polyimide or polyester film as the substrate.

[0003] When the FPC circuit board is produced, it is necessary to detect the defects on the surface of the FPC circuit board to avoid defects such as scratches and notches on the FPC circuit board, which will affect the use effect.

[0004] Traditional FPC circuit board detection is to convey the FPC circuit board through a production line, and during the conveying process, manual cooperation with auxiliary equipment is used for appearance inspection. However, this method is prone to omissions, and it is difficult to guarantee the accuracy of appearance detection. Summary of the Invention

[0005] In order to improve the above problems, the present application provides an FPC appearance detection equipment and its process.

[0006] The FPC appearance detection equipment and its process provided by the present application adopt the following technical solutions:

[0007] An FPC appearance detection equipment includes a dust isolation box for isolating static electricity and dust, and is externally provided with a controller. The dust isolation box includes a placement table, a to-be-inspected table, a feeding manipulator, an extraction manipulator, a first detection member, a second detection member, a detection table, and a discharging manipulator. The placement table is the initial storage point for the circuit board to be inspected, and the to-be-inspected table is arranged on one side close to the placement table. The feeding manipulator is located between the placement table and the to-be-inspected table and extracts the circuit board onto the to-be-inspected table. The detection table is located on the side of the to-be-inspected table away from the placement table and is set at a preset distance. An extraction manipulator is arranged above the to-be-inspected table, and the moving path of the extraction manipulator is from the to-be-inspected table to the detection table. The extraction manipulator extracts the circuit board on the to-be-inspected table and moves it to the detection table. The detection end of the first detection member provides bottom-up photographing detection and is arranged between the to-be-inspected table and the detection table. When the circuit board extracted by the extraction manipulator moves to the first detection member, the bottom of the circuit board is photographed and detected. The second detection member is arranged above the detection table and provides top-down photographing detection. When the extraction manipulator places the circuit board on the detection table, the second detection member photographs and detects the top of the circuit board. The discharging manipulator is located on one side of the detection table and extracts and discharges the circuit board after detection.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] Optionally, the first detection member and the second detection member are detected in staggered order.

[0012] 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.

[0013] 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.

[0014] By adopting the above technical solution, the vacuum suction cup generates vacuum suction force to suck 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 driving part drives the extraction seat to move along the guide rail, so that the lifting seat moves to the first detection part or the detection table, thus completing the transportation of the circuit board.

[0015] Optionally, the vacuum suction cup is further provided with a suction cup seat; a clamping groove is formed on the suction cup seat, and two groups of clamping mechanisms are arranged in the clamping groove.

[0016] By adopting the above technical solution, two groups of clamping mechanisms are used to provide relative force for clamping, and cooperate with the vacuum suction cup to improve the stability during the extraction and movement of the circuit board.

[0017] Optionally, the clamping mechanism includes a clamping part, a first elastic part, a second elastic part, a telescopic part, an ejecting part and a sliding part; a hidden cavity is further formed on the suction cup seat; a communication port is arranged between the hidden cavity and the clamping groove, a telescopic groove is formed on the wall surface close to the vacuum suction cup side, and an ejecting port is formed on the wall surface far from the telescopic groove side; the sliding part is slidably connected with the hidden cavity, and the side of the sliding part close to the clamping groove is a wedge surface; the telescopic part is connected with the sliding part and extends into the clamping groove through the communication port; the clamping part is located in the clamping groove and is connected with the telescopic part; the ejecting part penetrates through the ejecting port and the hidden cavity and extends into the telescopic groove, and is provided with an ejecting protrusion contacting the wedge surface of the sliding part; the first elastic part is located in the hidden cavity, one end of which is connected with the sliding part, and the other end is connected with the side surface of the hidden cavity far from the communication port; the second elastic part is located in the telescopic groove, one end of which is connected with the ejecting part, and the other end is connected with the groove wall of the telescopic groove.

[0018] By adopting the above technical solution, the ejecting part extends out of the ejecting port under the influence of elastic force. When the vacuum suction cup and the suction cup seat descend to the inspection table, the ejecting part contacts the inspection table and is pushed into the telescopic groove. The ejecting protrusion synchronously pushes the sliding part to move away from the clamping groove direction through the wedge surface of the sliding part. When the sliding part moves, it drives the clamping part to move towards the hidden cavity direction through the telescopic part, so that the two groups of clamping parts are opened simultaneously. When the suction cup seat is in contact with the inspection table, the circuit board is located at the notch of the clamping groove. Subsequently, the vacuum suction cup generates suction force to suck the circuit board into the clamping groove. The lifting member drives the vacuum suction cup and the suction cup seat to rise. During the rising process, the ejecting part extends out of the ejecting port under the influence of elasticity, and the sliding part is reset under the elastic force of the first elastic part, so that the clamping part moves towards the circuit board through the pushing action of the telescopic part, and the two clamping parts synchronously clamp both sides of the circuit board, thus providing the effect of clamping and fixing, and synchronously cooperating with the vacuum suction cup for auxiliary fixing to prevent the circuit board from falling.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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 illuminate the circuit board, making the image taken by the first detection component clearer and more complete.

[0025] An FPC appearance inspection process includes the following steps:

[0026] Circuit board conveying: The feeding robot takes out the circuit board from the placement table separately and places it on any test table;

[0027] Staggered extraction: Two groups of extraction manipulators stagger the extraction of circuit boards;

[0028] 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;

[0029] Image processing: The controller compares the complete PCB image with the captured image of the PCB to be tested and extracts the defect features;

[0030] 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;

[0031] 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.

[0032] 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.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 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 transports 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.

[0035] 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;

[0036] 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;

[0037] 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

[0038] Figure 1 is a schematic diagram of a first-view stereoscopic structure of a detection device in some embodiments of the present application;

[0039] Figure 2 is a schematic diagram of a second perspective stereoscopic structure of a detection device in some embodiments of the present application;

[0040] Figure 3 is a schematic diagram of the three-dimensional structure of the first detection member in some embodiments of the present application;

[0041] Figure 4It is a schematic three-dimensional structure diagram of the extraction manipulator in some embodiments of the present application;

[0042] Figure 5 It is a schematic three-dimensional structure diagram of the suction cup seat in some embodiments of the present application;

[0043] Figure 6 It is the present application Figure 5 The enlarged structure diagram of A therein;

[0044] Figure 7 It is a schematic three-dimensional structure diagram of the sliding part and the ejecting part in some embodiments of the present application;

[0045] The reference signs in the drawings are: 1, dust isolation box; 2, placing table; 3, table to be inspected; 4, feeding manipulator; 5, extraction manipulator; 51, extraction seat; 52, vacuum suction cup; 53, guide rail; 54, lifting member; 55, extraction driving part; 56, suction cup seat; 561, clamping groove; 562, hidden cavity; 563, communication port; 564, telescopic groove; 565, ejection port; 57, clamping mechanism; 571, clamping part; 5711, clamping groove; 5712, protective cotton; 572, first elastic part; 573, second elastic part; 574, telescopic part; 575, ejecting part; 5751, ejection protrusion; 576, sliding part; 577, pressure sensor; 578, light supplementing part; 6, first detection member; 61, moving rail; 62, driving member; 7, second detection member; 8, detection table; 9, discharging manipulator; 10, controller. Detailed Description of the Invention

[0046] The following uses specific examples to illustrate the embodiments of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the disclosed information of the present application. The present application can also be implemented or applied through other different specific embodiments. Various details in the present application can also be modified or changed according to different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0047] The following takes the drawings as a reference and details the embodiments of the present application so that those skilled in the technical field to which the present application belongs can easily implement it. The present application can be embodied in many different forms and is not limited to the embodiments described herein.

[0048] In the description of the present application, the expressions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics represented in connection 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 can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples represented in the present application and the features of different embodiments or examples.

[0049] In addition, the terms "first" and "second" are only used for indicating purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0050] Throughout the specification, when it is said that a device is "connected" to another device, this includes not only the case of "direct connection", but also the case of "indirect connection" where other elements are placed in between. Additionally, when it is said that a certain device "includes" a certain component, unless there is a particularly contrary record, it does not exclude other components, but means that other components may also be included.

[0051] The following Figure 1 - Figure 7 , further detailed description of the present application will be made with reference to the

[0052] An embodiment of the present application discloses an FPC appearance detection device and its process.

[0053] An FPC appearance detection device is applied to the appearance detection of an FPC circuit board. By performing appearance detection on the FPC circuit board product to be detected and comparing it with a normal FPC circuit board, it is possible to obtain whether there are defects on the product surface, such as scratches, dirt, broken lines, etc. Hereinafter, the FPC circuit board is simply referred to as the circuit board.

[0054] Referring to Figure 1 and Figure 2 As shown, it includes a dust isolation box 1 for isolating static electricity and dust. A number of observation windows are opened on the dust isolation box 1, and the observation windows are provided with transparent glass for dust isolation protection. A controller 10 can be arranged outside the dust isolation box 1. The controller 10 can control the operation of the appearance detection device and can view the image information during appearance detection.

[0055] The dust-proof box 1 includes a placement table 2, a to-be-inspected table 3, a feeding manipulator 4, an extraction manipulator 5, a first detection component 6, a second detection component 7, a detection table 8, and a discharging manipulator 9; the placement table 2 is the initial storage point for the circuit boards to be inspected. It can receive an external conveyor belt to move the placement tray with the circuit boards to the placement table 2, or the operator can manually place the placement device with the circuit boards on the placement table 2. The to-be-inspected table 3 is arranged close to one side of the placement table 2. The placement table 2 is used to store the circuit boards to be inspected uniformly, and the to-be-inspected table 3 is used to store the circuit boards to be inspected individually.

[0056] The feeding manipulator 4 is located between the placement table 2 and the to-be-inspected table 3, and extracts the circuit board onto the to-be-inspected table 3. The feeding manipulator 4 separately takes out any circuit board from the placement table 2 and places it on the to-be-inspected table 3 for individual inspection, avoiding the disorder of the circuit board sequence and position during inspection and preventing misjudgment.

[0057] The detection table 8 is arranged at a preset distance at the side of the to-be-inspected table 3 away from the placement table 2. The preset distance is determined according to the size of the dust-proof box 1, and can be an interval distance such as 1 m or 2 m. The specific preset distance is not limited here. The function of the detection table 8 is to provide a storage point for the circuit board during the detection process.

[0058] Above the to-be-inspected table 3 is provided with an extraction manipulator 5, and the moving path of the extraction manipulator 5 is from the to-be-inspected table 3 to the detection table 8. The extraction manipulator 5 can extract the circuit board on the to-be-inspected table 3 and convey it to the detection table 8. During the extraction process, the appearance or vision of the circuit board is detected.

[0059] The detection end of the first detection component 6 provides a bottom-up photographing detection, and is arranged between the to-be-inspected table 3 and the detection table 8. When the circuit board extracted by the extraction manipulator 5 moves to the first detection component 6, the extraction manipulator 5 stops. The first detection component 6 takes a bottom-up upward-looking angle photograph of the bottom of the circuit board to obtain the image information or image data of the bottom surface of the circuit board.

[0060] The second detection component 7 is arranged above the detection table 8 to provide a top-down photographing detection. When the extraction manipulator 5 places the circuit board on the detection table 8, the second detection component 7 takes a top-down photograph of the top of the circuit board to obtain the image information or image data of the top surface of the circuit board.

[0061] Both the first detection component 6 and the second detection component 7 can adopt industrial cameras for CCD detection and can be equipped with built-in flashlights. 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 dust-proof box 1 through circuits or electrical signals. The controller 10 compares the image information of the circuit board with the image of the complete circuit board or conducts data comparison to obtain the result of the appearance detection and determine whether there are defects on the circuit board.

[0062] The discharging manipulator 9 is located on one side of the inspection table 8, and after extracting the circuit boards that have been photographed and inspected by the first inspection member 6 and the second inspection member 7, it can discharge the circuit boards, which can be placed on placing appliances such as placing trays outside the dust isolation box 1, or on an externally connected conveyor belt. The extraction methods of the feeding manipulator 4 and the extraction manipulator 5 can both adopt the vacuum suction extraction method.

[0063] Specifically, the feeding manipulator 4 extracts several circuit boards on the placing table 2 separately and places them on the to-be-inspected table 3. After the extraction manipulator 5 extracts the circuit board from the to-be-inspected table 3, it moves towards the inspection table 8. During the movement, it stops when passing by the first inspection member 6. The first inspection member 6 takes a photo of the bottom of the extracted circuit board from a perspective of looking up to obtain image information. Subsequently, the extraction manipulator 5 conveys the circuit board to the inspection table 8. The second inspection member 7 is provided on the top of the inspection table 8, and the second inspection member 7 takes a photo of the top of the circuit board from a perspective of looking down to obtain image information. After obtaining the image information of the top and bottom of the circuit board, the controller 10 makes a comparison to obtain the inspection result. The inspected circuit board finally leaves the dust isolation box 1 through the extraction of the discharging manipulator 9. This application adopts an automatic feeding and discharging method to take photos of the front and back sides of the circuit board to obtain image information, achieving high-efficiency conveying while detecting defective products and improving the yield rate.

[0064] Among them, embedding grooves similar to the circuit board style can be set on both the to-be-inspected table 3 and the inspection table 8 to ensure accurate positioning during extraction.

[0065] In some embodiments, referring to Figure 1 and Figure 2 as shown, there are two sets each of the to-be-inspected table 3, the inspection table 8, and the extraction manipulator 5, forming two inspection groups. The two inspection groups can synchronously inspect two circuit boards, further improving the inspection and detection efficiency.

[0066] Referring to Figure 3 as shown, both the first inspection member 6 and the second inspection member 7 include a moving rail 61 and a driving member 62. The driving member 62 can adopt a chain belt structure or a lead screw structure, which is driven by a driving motor. The driving member 62 drives the first inspection member 6 or the second inspection member 7 to move along the moving rail 61, and the moving path passes through the two inspection groups, so that the first inspection member 6 or the second inspection member 7 can move to the two inspection groups respectively for inspection by moving, without setting two sets of the first inspection and second inspection members 7, improving the flexibility of inspection.

[0067] Taking the first inspection member 6 as an example in the figure, the first inspection member 6 is located below the to-be-inspected table 3, and the moving rail 61 and the driving member 62 of the second inspection member 7 are located above the inspection table 8.

[0068] Among them, the moving rail 61 can be set for horizontal and vertical movement to facilitate the driving member 62 to adjust the position of the first detection member 6 (not shown in the figure).

[0069] Furthermore, the first detection member 6 and the second detection member 7 perform staggered detections. That is, when the first detection member 6 detects the bottom surface of the circuit board in one set of detection groups, the second detection group detects the top surface of the circuit board in the other group. This staggered method can make the detection distribution more reasonable and flexible, without waiting for the detection of the top and bottom surfaces of the circuit boards in one set of detection groups to be completed before moving to the other set of detection groups to detect the circuit boards.

[0070] In some embodiments, refer to Figure 4 As shown, the extraction manipulator 5 includes an extraction base 51, a vacuum chuck 52, a guide rail 53, a lifting member 54, and an extraction driving part 55; the guide rail 53 is connected to the side wall surface of the dust isolation box 1 and is located above the inspection table 3 and the detection table 8. The extraction base 51 is slidably connected to the guide rail 53. The extraction driving part 55 is connected to the extraction base 51 and provides the driving force for the extraction base 51 to move along the guide rail 53. The extraction driving part 55 can adopt a chain belt structure or a lead screw structure and is provided with a driving motor for driving.

[0071] The lifting member 54 is installed on the extraction base 51. The lifting member 54 can adopt driving components such as an electric push rod or a cylinder, or can also adopt a motor and a lead screw structure. The vacuum chuck 52 is connected to the lifting end of the lifting member 54. The vacuum chuck 52 generates a vacuum suction force to suck the circuit board, and then the lifting member 54 lifts the vacuum chuck 52 and the circuit board upward, so that the circuit board is separated from the inspection table 3. The extraction driving part 55 drives the extraction base 51 to move along the guide rail 53, so that the lifting base moves to the first detection member 6 or the detection table 8, thereby completing the transportation of the circuit board.

[0072] When moving to the first detection member 6, the extraction driving part 55 stops driving. The first detection member 6 is located below the extraction base 51. Therefore, the bottom surface of the circuit board is photographed at a perspective of looking up to obtain image information.

[0073] After the photographing is completed, the extraction driving part 55 continues to drive the extraction base 51 to move the extraction base 51 to the detection table 8. The lifting member 54 drives the vacuum chuck 52 to descend to the detection table 8, and the vacuum chuck 52 disconnects the suction, so that the circuit board can be stably placed on the detection table 8.

[0074] In some embodiments, refer to Figure 4As shown, the vacuum suction cup 52 is further provided with a suction cup seat 56. A clamping groove 561 is formed on the suction cup seat 56, and two groups of clamping mechanisms 57 are arranged in the clamping groove 561. The clamping mechanisms 57 can clamp the circuit board to provide a fixing effect in addition to the vacuum suction cup 52, avoiding the situation that the vacuum suction cup 52 becomes loose during use, resulting in the circuit board falling off the suction cup seat 56 or the vacuum suction cup 52. The two groups of clamping mechanisms 57 provide relative forces for clamping, cooperating with the vacuum suction cup 52 to improve the stability during the extraction and movement of the circuit board.

[0075] Further, referring to Figure 5 and Figure 6 As shown, the clamping mechanism 57 includes a clamping part 571, a first elastic part 572, a second elastic part 573, a telescopic part 574, an ejecting part 575 and a sliding part 576; a hidden cavity 562 is also formed on the suction cup seat 56. Since there are two groups of clamping mechanisms 57, there are also two hidden cavities 562, which are respectively located on both sides of the clamping groove 561. A communication port 563 is arranged between the hidden cavity 562 and the clamping groove 561. A telescopic groove 564 is formed on the wall surface close to the side of the vacuum suction cup 52, and an ejection port 565 is formed on the wall surface far from the telescopic groove 564.

[0076] Referring to Figure 6 and Figure 7 As shown, the sliding part 576 is slidably connected to the hidden cavity 562, and the side of the sliding part 576 close to the clamping groove 561 is a wedge-shaped surface. The sliding part 576 can be a sliding block, and the style of the sliding block matches the wall surface of the hidden cavity 562. Therefore, the sliding block can slide along the inner wall of the hidden cavity 562, and a through hole is formed on the wedge-shaped surface of the sliding block.

[0077] The telescopic part 574 is connected to the sliding part 576 and extends into the clamping groove 561 through the communication port 563. The telescopic part 574 can be a telescopic rod, and the telescopic rod fits with the communication port 563 and can extend out of or into the hidden cavity 562 along the communication port 563. The clamping part 571 is located in the clamping groove 561 and is connected to the telescopic part 574. When the telescopic part 574 moves, it can drive the clamping part 571 to move. The clamping part 571 can be 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] When the clamping mechanism 57 is provided, the embedding groove may not be provided on the inspection table 3, which facilitates the stable entry of the circuit board into the clamping groove 561 when the suction cup base 56 descends to the inspection table 3.

[0083] Further, as shown in Figure 6 shown, a clamping groove 5711 is provided on the side of the clamping part 571 away from the communication port 563, and a protective cotton 5712 is provided in the clamping groove 5711. The width of the clamping groove 5711 can be the same as or slightly larger than the thickness of the circuit board, so that the edge of the circuit board can be clamped into it, 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 due to excessive clamping force.

[0084] Among them, sliding grooves can be opened on the inner wall of the clamping groove 561, and limit protrusions can be provided on the clamping part 571. By slidingly connecting the limit protrusions with the sliding grooves, the moving path of the clamping part 571 is fixed, which can prevent the clamping part 571 from shifting during clamping, and at the same time ensure the stable docking of the circuit board with the clamping groove 5711.

[0085] In some embodiments, as shown in Figure 6 shown, a pressure sensor 577 is provided in the telescopic groove 564. When the ejecting part 575 extends into the telescopic groove 564, the pressure sensor 577 contacts the ejecting part 575. When the ejecting part 575 extends out of the ejection port 565, the ejecting part 575 is not in contact with or separated from the pressure sensor 577. 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, and the pressure sensor is electrically connected to the switch of the vacuum suction cup 52. The pressure sensor 577 can issue an opening or closing instruction to the vacuum suction cup 52, and the switch of the vacuum suction cup 52 can be controlled by using the pressure sensor 577 to achieve the effect of cooperating with the opening of the vacuum suction cup 52.

[0086] For example, after the suction cup base 56 fits with the test table, the ejecting part 575 extends into the telescopic groove 564 and presses down on the pressure sensor 577, so that the pressure sensor 577 opens the vacuum suction cup 52 through electrical connection after being pressed. The vacuum suction cup 52 can generate suction to adsorb the circuit board. When the suction cup base 56 descends to fit with the detection table 8, the ejecting part 575 extends into the telescopic groove 564 again and presses down on the pressure sensor 577. After the pressure sensor 577 is pressed, it closes the vacuum suction cup 52 through electrical connection again, so that the vacuum suction cup 52 can be closed, and the circuit board that loses suction can fall from the clamping groove 561.

[0087] Using the pressure sensor 577 to cooperate with the telescopic action of the ejecting part 575 to open or close the vacuum suction cup 52 can facilitate the opening and closing of the vacuum suction cup 52 without the need for the controller 10 to control.

[0088] In some embodiments, as shown in Figure 7As 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.

[0089] 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.

[0090] 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.

[0091] 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:

[0092] 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.

[0093] S200, staggered extraction: two groups of extraction manipulators 5 extract circuit boards in a staggered manner.

[0094] 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.

[0095] 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 .

[0096] 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.

[0097] 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.

[0098] 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.

[0099] S600, Rejection of defective products: Convey all the inspected circuit boards through the QR code rejection area. Scan the QR code on the circuit board, and the system records the defect feature information of the circuit board corresponding to the QR code. Defective products will automatically pop out and be rejected.

[0100] Through the above FPC appearance detection process, it is convenient to detect the appearance defects of FPC circuit boards. At the same time, the staggered detection method can improve the detection efficiency, and the QR code scanning can input the defect features into the system for subsequent rejection.

[0101] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this 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) includes 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 the 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 movement of the extraction robot (5) The path is from the inspection table (3) to the inspection table (8), the extraction robot (5) extracts the circuit board on the inspection table (3) and moves it to the inspection table (8); the detection end of the first detection component (6) provides bottom-up photo detection and is arranged between the inspection table (3) and the inspection table (8); when the circuit board extracted by the extraction robot (5) moves to the first detection component (6), the bottom of the circuit board is photographed for detection; the second detection component (7) is arranged above the inspection table (8) and provides top-down photo detection; when the extraction robot (5) places the circuit board on the inspection table (8), the second detection component (7) takes a photo of the top of the circuit board; the discharge machine The manipulator (9) is located on one side of the inspection platform (8) and extracts and discharges the inspected circuit board; the extraction manipulator (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 platform (3) and the inspection platform (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); the vacuum suction cup (52) is connected to the lifting end of the lifting member (54); the vacuum suction cup (52) is connected to the lifting end of the lifting member (54); The disc (52) is also provided with a suction cup seat (56); a clamping groove (561) is provided on the suction cup seat (56), and two sets of clamping mechanisms (57) are provided in the clamping groove (561); the clamping mechanism (57) comprises a clamping part (571), a first elastic part (572), a second elastic part (573), a telescopic part (574), an ejection part (575) and a sliding part (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 side of the vacuum suction cup (52), and an ejection outlet (565) is provided on the wall surface away from the telescopic groove (564);The sliding portion (576) is slidably connected to the concealed cavity (562), and a 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 extends into the clamping groove (561) through the connecting port (563); the clamping portion (571) is located in the clamping groove (561) and is connected to the telescopic portion (574); the ejection portion (575) penetrates the ejection port (565) and the hidden cavity (562), extends into the telescopic groove (564), and is provided with an ejection protrusion (5751) in contact with 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 the hidden cavity (562) away from the connecting port (563). The second elastic part (573) is located in the telescopic groove (564), and one end is connected to the ejection part (575), and the other end is connected to the groove wall of the telescopic groove (564); a pressure sensor (577) is provided in the telescopic groove (564), the pressure sensor (577) is in contact with the ejection part (575), and the pressure sensor (577) is electrically connected to the switch of the vacuum suction cup (52); the ejection part (575) is extended out of the ejection outlet (565) under the influence of the elastic force of the second elastic part (573), and when the vacuum suction cup (52) and the suction cup seat (56) are lowered to the inspection table (3), the ejection part (575) contacts the inspection table (3) and is pushed into the telescopic groove (564), and the ejection protrusion (577) is pushed out of the inspection table (3). The sliding part (576) is synchronously pushed by the wedge-shaped surface of the sliding part (576) to move in a direction away from the clamping groove (561). When the sliding part (576) moves, the clamping part (571) is driven to move in the direction of the hidden cavity (562) through the telescopic part (574), so that the two groups of clamping parts (571) are opened at the same time. At the same time, the ejection part (575) extends into the telescopic groove (564) and presses down the pressure sensor (577), so that the pressure sensor (577) is pressed and opens the vacuum suction cup (52) through the electrical connection. The vacuum suction cup (52) generates suction to suck the circuit board into the clamping groove (561). The lifting member (54) drives the vacuum suction cup (52) and the suction cup seat (56) to rise. During the rising process, the ejection part (575) is elastically supported. The ejection portion (575) extends out of the ejection port (565) under the influence of the elastic force of the first elastic portion (572), and the sliding portion (576) is reset under the influence of 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 cooperate with the vacuum suction cup (52) for auxiliary fixing; when the suction cup seat (56) descends to fit with the detection table (8), the ejection portion (575) extends into the telescopic groove (564) and presses down the pressure sensor (577), and after the pressure sensor (577) is pressed, the vacuum suction cup (52) is closed again through the electrical connection, so that the vacuum suction cup (52) is closed, and the circuit board that loses suction falls from the clamping groove (561).

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, characterized in that: A clamping groove (5711) is provided on a side of the clamping portion (571) away from the connecting port (563), and a protective cotton (5712) is provided in the clamping groove (5711).

5. The FPC appearance inspection device according to claim 1, characterized in that: 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), wherein the fill-in light direction of the fill-in light portion (578) faces toward the clamping groove (561).

6. A FPC appearance inspection process, characterized in that: The FPC appearance inspection device applied to any one of claims 1 to 5 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 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 photographed 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.

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