SMT patch online AOI detection device

Abstract

The utility model relates to SMT patch detection technical field, concretely is a kind of SMT patch on-line AOI detection device, including detection operation platform, the both sides of the detection operation platform top are equipped with industrial camera support frame, industrial camera is equipped between two industrial camera support frames, the front of industrial camera is equipped with display screen. When using, by rotatingly connecting first support plate and second support plate in the both sides of circuit board detection groove respectively, and setting shaftless guide rail and support guide rod between first support plate and second support plate respectively, first clamp and second clamp are supported, shaftless guide rail drives first clamp and second clamp horizontal movement respectively by electromagnetic force, to clamp and drive circuit board to the front below industrial camera and detect, in detection process, circuit board can be turned over 90 degrees left or right by motor drive transmission wheel, to realize the purpose that industrial camera detects the side of circuit board.

Description

Technical Field

[0001] This utility model relates to the field of SMT chip inspection technology, and in particular to an online AOI inspection device for SMT chips. Background Technology

[0002] AOI inspection equipment, also known as automated optical inspection, is a device that uses optical principles to detect defects such as bridging, displacement, and abnormal solder content in the soldering process. It is widely used in PCB, FPD, and semiconductor manufacturing. It scans the circuit board with a high-speed vision system, collects images, compares them with a standard parameter database, and identifies and marks the defect locations through image processing.

[0003] After SMT assembly, circuit boards undergo AOI (Automated Optical Inspection) to ensure product quality. Post-soldering inspection typically checks the solder joints and component positions on both the front and back sides. The AOI equipment uses industrial cameras positioned on the top and / or bottom of the circuit board to capture images and compare them with data in a database.

[0004] For example, the utility model patent entitled "AOI Inspection Device for Easy Loading and Unloading" published in Chinese Patent Publication No. CN211593982U includes a frame, an optical inspection component, and a station turntable. The station turntable is set on one side of the frame, and a rotating motor is provided below the station turntable. The rotating motor is fixedly connected to the center of the bottom of the station tray. The surface of the station turntable is divided into a loading station, an inspection station, a repair station, and an unloading station in a clockwise direction. The optical inspection component is set above the frame and is located above the inspection station of the station turntable.

[0005] The aforementioned AOI inspection device, which facilitates loading and unloading, solves the problem of PCB board displacement during loading and unloading in existing AOI inspection devices. Furthermore, its rotary table structure reduces the overall size of the AOI inspection device, bringing convenience to users.

[0006] However, during the testing process, it can only perform single-sided testing. When testing the other side, the circuit board needs to be flipped over. More advanced equipment supports the circuit board with a hollow bracket and uses two cameras, one above and one below, for testing. The sides of the circuit board often have various interfaces, and the soldering stability of these interfaces seriously affects the quality of the circuit board. Currently, there is no testing equipment that can easily test the sides of the circuit board.

[0007] Therefore, this application proposes an online AOI inspection device for SMT (Surface Mount Technology) to facilitate the inspection of the sides of circuit boards. Utility Model Content

[0008] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an online AOI inspection device for SMT components, which solves the problem of inconvenience in inspecting the side of the circuit board mentioned in the prior art.

[0009] To achieve the above and other related objectives, this utility model provides an online AOI inspection device for SMT placement, including an inspection operating table. Industrial camera support frames are provided on both sides of the top of the inspection operating table, and an industrial camera is provided between the two industrial camera support frames. A display screen is provided on the front of the industrial camera. The top of the inspection platform is provided with a circuit board inspection slot, which is located between two industrial camera support frames. The bottom of the industrial camera is provided with an optical lens. The inside of the circuit board inspection slot is provided with a rotatable circuit board clamping mechanism. The back of the inspection platform is provided with an electrical component mounting compartment. The inside of the electrical component mounting compartment is provided with a motor and a main board that controls the operation and power supply of the motor. The electrical component mounting compartment is connected to the industrial camera and the circuit board clamping mechanism respectively. The circuit board clamping mechanism is used to clamp the circuit board and position the circuit board directly below the industrial camera.

[0010] Preferably, the circuit board clamping mechanism includes a first support plate and a second support plate, the first support plate and the second support plate being rotatably connected to both sides of the circuit board detection groove; A shaftless guide rail is provided between the first support plate and the second support plate. Two support guide rods are symmetrically provided on both sides of the shaftless guide rail. A transmission wheel is provided at the center of the outer surface of the first support plate. The transmission wheel is connected to the motor in the electrical component installation compartment. The shaftless guide rail and the supporting guide rod are fixedly supported by a first clamp and a second clamp, both of which can slide on the surface of the shaftless guide rail.

[0011] Preferably, the shaftless guide rail is provided with a conductive slip ring, which can rotate on the outer surface of the shaftless guide rail, and the conductive slip ring is connected to the main board inside the electrical component mounting compartment.

[0012] Preferably, both the first clamp and the second clamp include a guide rail slider and a support slider. The guide rail slider is disposed on the outer surface of the shaftless guide rail, and the guide rail slider is driven by the shaftless guide rail to slide along the axial direction of the shaftless guide rail. The support sliders are respectively disposed on the outer surfaces of the two support guide rods, and the support sliders can slide on the surfaces of the support guide rods; The tops of the guide rail slider and the support slider are jointly supported by an inverted T-shaped support plate.

[0013] Preferably, the opposite surfaces of the two inverted T-shaped support plates are provided with buffer plates, and the buffer plates are elastic.

[0014] Preferably, the buffer plate includes a skin fixed to the outer surface of the inverted T-shaped support plate, and the skin has honeycomb holes inside.

[0015] Preferably, the second fixture has a circuit board support plate on the side of the buffer plate facing the first fixture, and the first fixture has a support plate through groove on the side of the buffer plate, and the circuit board support plate is adapted to the support plate through groove.

[0016] Preferably, the top of the circuit board tray is flush with the top of the bottom T-shaped platform of the inverted T-shaped support plate.

[0017] As described above, the SMT online AOI inspection device of this utility model has the following beneficial effects: 1. This utility model rotatably connects a first support plate and a second support plate to both sides of the circuit board inspection groove, and sets a shaftless guide rail and a support guide rod between the first support plate and the second support plate to support the first clamp and the second clamp. The shaftless guide rail drives the first clamp and the second clamp to move horizontally by electromagnetic force, so as to clamp and drive the circuit board to be directly below the industrial camera for inspection. During the inspection process, the circuit board can be rotated 90 degrees to the left or right by a motor-driven transmission wheel, thereby realizing the purpose of the industrial camera to inspect the side of the circuit board.

[0018] 2. This utility model provides a skin on the opposite sides of two inverted T-shaped support plates and has honeycomb holes inside the skin. During the clamping process of the circuit board, the deformation of the skin and honeycomb holes protects the edge of the circuit board, thereby achieving the effect of protecting the circuit board.

[0019] 3. By setting up a circuit board tray and a through slot for the tray respectively, the circuit board can be supported by the circuit board tray when placing the circuit board, and then the circuit board can be clamped by the first clamp and the second clamp, eliminating the need to hold the circuit board by hand, thus improving convenience and safety.

[0020] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. Attached Figure Description

[0021] Figure 1 The diagram shown is a structural schematic of this utility model.

[0022] Figure 2 The diagram shown is a schematic diagram of the circuit board clamping mechanism of this utility model.

[0023] Figure 3The image shown is a top view of the circuit board clamping mechanism of this utility model.

[0024] Figure 4 The diagram shown is a structural schematic of the second clamp of this utility model.

[0025] Figure 5 The diagram shown is a structural schematic of the first clamp of this utility model.

[0026] Figure 6 The diagram shown is a structural schematic of the buffer plate of this utility model.

[0027] Component designation explanation: 1. Inspection workbench; 2. Industrial camera support frame; 3. Industrial camera; 4. Circuit board inspection slot; 5. Circuit board clamping mechanism; 51. First support plate; 52. Second support plate; 53. Shaftless guide rail; 54. Support guide rod; 55. Transmission wheel; 56. Conductive slip ring; 57. First clamp; 58. Second clamp; 591. Guide rail slider; 592. Support slider; 593. Inverted T-shaped support plate; 594. Buffer plate; 5941. Skin; 5942. Honeycomb hole; 595. Circuit board tray; 596. Tray through slot; 6. Electrical component mounting compartment; 7. Display screen. Detailed Implementation

[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0029] Please see Figures 1 to 6 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0030] like Figures 1-3As shown, this utility model provides an online AOI inspection device for SMT components, including an inspection operating table 1, industrial camera support frames 2 on both sides of the top of the inspection operating table 1, an industrial camera 3 between the two industrial camera support frames 2, and a display screen 7 on the front of the industrial camera 3. The display screen 7 is used to display comparison images during the AOI inspection process to facilitate identification and comparison by the inspector. The top of the inspection platform 1 is equipped with a circuit board inspection slot 4, which is located between two industrial camera support frames 2. The width and depth of the circuit board inspection slot 4 are greater than the height and width of the circuit board to be inspected, providing space for the circuit board to be flipped. The bottom of the industrial camera 3 is equipped with an optical lens for AOI inspection. The circuit board inspection slot 4 is equipped with a rotatable circuit board clamping mechanism 5. During AOI inspection, the circuit board clamping mechanism 5 is used to clamp and fix the current board and move the circuit board to directly below the industrial camera 3. During the inspection process, the circuit board is flipped so that the side of the circuit board faces the industrial camera 3 to achieve side inspection of the circuit board. The back of the inspection platform 1 is equipped with an electrical component mounting compartment 6. The electrical component mounting compartment 6 is equipped with a motor and a main board that controls the operation and power supply of the motor. The electrical component mounting compartment 6 is connected to the industrial camera 3 and the circuit board clamping mechanism 5 respectively. In use, the electrical component mounting compartment 6 is connected to the host computer to receive instructions from the host computer and to supply power to the corresponding equipment.

[0031] like Figure 2 and Figure 3 As shown, in some embodiments, the circuit board clamping mechanism 5 of this utility model includes a first support plate 51 and a second support plate 52, and the first support plate 51 and the second support plate 52 are rotatably connected to both sides of the circuit board detection groove 4, respectively. A shaftless guide rail 53 is provided between the first support plate 51 and the second support plate 52. Two support guide rods 54 are symmetrically provided on both sides of the shaftless guide rail 53. The first support plate 51 and the second support plate 52 on both sides are connected into one unit through the shaftless guide rail 53 and the support guide rods 54, so that the first support plate 51 and the second support plate 52 can be rotated synchronously. A transmission wheel 55 is provided at the center of the outer surface of the first support plate 51. The transmission wheel 55 is connected to the servo motor or stepper motor in the electrical component mounting compartment 6. The motor drives the transmission wheel 55 to rotate quantitatively through transmission components such as gears and belts, thereby driving the entire circuit board clamping mechanism 5 to rotate, so that the side of the clamped circuit board faces the industrial camera 3. The shaftless guide rail 53 and the support guide rod 54 are fixedly supported by the first clamp 57 and the second clamp 58. Both the first clamp 57 and the second clamp 58 can slide on the surface of the shaftless guide rail 53. The first clamp 57 and the second clamp 58 move at different speeds on the surface of the shaftless guide rail 53. During the inspection process, the second clamp 58 moves first to clamp the circuit board located between the first clamp 57 and the second clamp 58. Then, the first clamp 57 and the second clamp 58 move synchronously to move the clamped circuit board to directly below the industrial camera 3. The circuit board is inspected by AOI through the industrial camera at the bottom of the industrial camera 3. After the inspection is completed, the first clamp 57 and the second clamp 58 move synchronously in opposite directions to the designated position. Then, the first clamp 57 stops, while the second clamp 58 continues to release the circuit board a short distance.

[0032] like Figure 2 and Figure 3 As shown, in some embodiments, the shaftless guide rail 53 of this utility model is provided with a conductive slip ring 56. The conductive slip ring 56 can rotate on the outer surface of the shaftless guide rail 53, and the conductive slip ring 56 is connected to the main board inside the electrical component mounting compartment 6. When the shaftless guide rail 53 rotates with the first support plate 51, the conductive slip ring 56 continues to maintain its shape to continuously supply power to the shaftless guide rail 53 to avoid wire entanglement. The structure of the conductive slip ring 56 consists of two parts: a stator and a rotor. The stator is fixedly connected to the inner wall of the circuit board detection groove 4, and the rotor is nested inside the stator and fixed to the outer surface of the shaftless guide rail 53. The rotor's wires are led to the inside of the shaftless guide rail 53 and connected to the components of the shaftless guide rail 53. When the rotor rotates synchronously with the shaftless guide rail 53, a continuous electrical connection is achieved through the conductive contacts or brush filaments between the stator and the rotor.

[0033] like Figure 4 and Figure 5 As shown, in some embodiments, both the first clamp 57 and the second clamp 58 of this utility model include a guide rail slider 591 and a support slider 592. The guide rail slider 591 is disposed on the outer surface of the shaftless guide rail 53, and the guide rail slider 591 is driven by the shaftless guide rail 53 to slide along the axial direction of the shaftless guide rail 53. The shaftless guide rail 53 is provided with an electromagnetic drive component inside. This component drives the guide rail slider 591 to perform linear reciprocating motion along the axial direction of the shaftless guide rail 53 by controlling the current on / off and direction. Support sliders 592 are respectively disposed on the outer surfaces of the two support guide rods 54, and the support sliders 592 can slide on the surface of the support guide rods 54. The support guide rods 54 provide sliding guidance for the support sliders 592, ensuring that the support sliders 592 and the guide rail sliders 591 move synchronously. The tops of the guide slider 591 and the support slider 592 are jointly supported by an inverted T-shaped support plate 593. The inverted T-shaped support plate 593 is made of high-strength aluminum alloy, and its top surface is anodized, which can effectively improve surface hardness and wear resistance, and avoid surface scratches caused by friction after long-term use, which would affect the stability of the support for the circuit board. At the same time, the length of the inverted T-shaped support plate 593 is slightly larger than the width of the circuit board to be tested, so as to support and position the circuit board. Through the synchronous sliding of the guide slider 591 and the support slider 592, the inverted T-shaped support plate 593 is driven to clamp and release the circuit board, so as to provide a stable support base when clamping circuit boards of different sizes, and prevent the circuit board from tilting or falling off during flipping or moving. To improve inspection efficiency, the shaftless guide rail 53 can be set on both sides of the first support plate 51 and the second support plate 52, and the support guide rod 54 can be removed, so that the bottom of the circuit board is exposed in a large area. At the same time, a second industrial camera can be set at the bottom of the circuit board inspection slot 4 to realize simultaneous inspection of the top and bottom sides of the circuit board.

[0034] like Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the opposing surfaces of the two inverted T-shaped support plates 593 of this invention are provided with buffer plates 594, which are elastic. Their elastic coefficient is adapted to the thickness and material of the circuit board to be tested, ensuring that sufficient clamping force is provided during clamping to prevent the circuit board from slipping, while avoiding indentation or damage to surface mount components due to excessive clamping. When the first clamp 57 and the second clamp 58 approach each other to clamp the circuit board, the buffer plate 594 first contacts the edge of the circuit board. As the first clamp 57 and the second clamp 58 continue to move, the buffer plate 594 undergoes elastic deformation. The reaction force generated by the deformation firmly clamps the circuit board between the two inverted T-shaped support plates 593. Simultaneously, its elastic buffering characteristics absorb the impact force generated during clamping, preventing damage to the circuit board from hard contact. During the circuit board flipping process, the elasticity of the buffer plate 594 can also adapt to the small displacement of the circuit board caused by gravity, maintaining clamping stability and ensuring that the positional accuracy of the circuit board is not affected during testing.

[0035] like Figure 6As shown, in some embodiments, the buffer plate 594 of this utility model includes a skin 5941 fixed to the outer surface of the inverted T-shaped support plate 593. The skin 5941 has honeycomb holes 5942 inside. The skin 5941 is made of nitrile rubber or silicone, which has good elasticity and wear resistance. Its thickness is 1.5-3mm, which can be adjusted according to the thickness of the circuit board to ensure full contact with the edge of the circuit board. The honeycomb holes 5942 are hexagonal honeycomb structures made of lightweight polypropylene material. The side length of a single honeycomb hole 5942 is 2-5mm. The honeycomb holes 5942 are connected by ribs with a thickness of 0.2-0.5mm. This structural design can provide uniform buffering force when the skin 5941 is under pressure, and can also effectively reduce the overall weight of the buffer plate 594, avoiding additional burden on the sliding of the first clamp 57 and the second clamp 58. When the buffer plate 594 clamps the circuit board, the skin 5941 first undergoes elastic deformation, transmitting the pressure to the honeycomb holes 5942. The structure of the honeycomb holes 5942 further absorbs energy through the bending of the ribs and the contraction of the hole walls, so that the clamping force forms a uniformly distributed stress field at the edge of the circuit board, preventing excessive local pressure from causing the circuit board to deform or the surface mount components to fall off. At the same time, the resilience of the honeycomb structure ensures that the buffer plate 594 can maintain stable elastic performance after multiple clamping, extending its service life.

[0036] like Figure 2 , Figure 4 and Figure 5 As shown in some embodiments, the buffer plate 594 of the second clamp 58 of this utility model has a circuit board support plate 595 on the side facing the first clamp 57, and the buffer plate 594 of the first clamp 57 has a support plate through groove 596 on the side, and the circuit board support plate 595 is adapted to the support plate through groove 596. During the testing process, the tester only needs to place the circuit board on the surface of the circuit board support plate 595 according to the testing direction of the circuit board. The circuit board is supported by the circuit board support plate 595 and is clamped as the distance between the first clamp 57 and the second clamp 58 decreases. During this process, the operator does not need to hold the circuit board by hand, which improves the convenience and safety of the test.

[0037] like Figure 2 As shown, in some embodiments, the top of the circuit board support plate 595 of this utility model is flush with the top of the bottom T-shaped platform of the inverted T-shaped support plate 593; when the first clamp 57 and the second clamp 58 clamp the circuit board, the bottom of the circuit board will not be damaged or lifted by the outer surface of the inverted T-shaped support plate 593 due to being too high or too low, which further improves the convenience of operation and the protection of the circuit board.

[0038] In summary, the SMT inline AOI inspection device of this invention uses a first support plate 51 and a second support plate 52 rotatably connected to both sides of the circuit board inspection slot 4. A shaftless guide rail 53 and a support guide rod 54 are respectively set between the first support plate 51 and the second support plate 52 to support the first clamp 57 and the second clamp 58. The shaftless guide rail 53 drives the first clamp 57 and the second clamp 58 to move horizontally through electromagnetic force, so as to clamp and drive the circuit board to be directly below the industrial camera 3 for inspection. During the inspection process, the circuit board can be rotated 90 degrees to the left or right by the transmission wheel 55 driven by the motor, so as to achieve the purpose of the industrial camera to inspect the side of the circuit board.

[0039] This invention provides a skin 5941 on the opposite surfaces of two inverted T-shaped support plates 593, and provides honeycomb holes 5942 inside the skin 5941. During the clamping process of the circuit board, the deformation of the skin 5941 and the honeycomb holes 5942 protects the edge of the circuit board, thereby achieving the effect of protecting the circuit board.

[0040] This utility model, by setting a circuit board support plate 595 and a support plate through groove 596 respectively, allows the circuit board to be supported by the circuit board support plate 595 when placing the circuit board, and then clamped by the first clamp 57 and the second clamp 58. The circuit board can be positioned without the need for manual support, thus improving convenience and safety.

[0041] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0042] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An online AOI inspection device for SMT (Surface Mount Technology) components, characterized in that, The device includes a testing workbench (1), with industrial camera support frames (2) on both sides of the top of the testing workbench (1), and an industrial camera (3) between the two industrial camera support frames (2). The front of the industrial camera (3) is equipped with a display screen (7). The top of the inspection platform (1) is provided with a circuit board inspection slot (4), which is located between two industrial camera support frames (2). The bottom of the industrial camera (3) is provided with an optical lens. The inside of the circuit board inspection slot (4) is provided with a rotatable circuit board clamping mechanism (5). The back of the inspection platform (1) is provided with an electrical component mounting compartment (6). The inside of the electrical component mounting compartment (6) is provided with a motor and a main board for controlling the operation and power supply of the motor. The electrical component mounting compartment (6) is connected to the industrial camera (3) and the circuit board clamping mechanism (5) respectively. The circuit board clamping mechanism (5) is used to clamp the circuit board and move the circuit board to be directly below the industrial camera (3).

2. The SMT inline AOI inspection device according to claim 1, characterized in that: The circuit board clamping mechanism (5) includes a first support plate (51) and a second support plate (52), and the first support plate (51) and the second support plate (52) are rotatably connected to both sides of the circuit board detection groove (4). A shaftless guide rail (53) is provided between the first support plate (51) and the second support plate (52). Two support guide rods (54) are symmetrically provided on both sides of the shaftless guide rail (53). A transmission wheel (55) is provided at the center of the outer surface of the first support plate (51). The transmission wheel (55) is connected to the motor in the electrical component installation compartment (6). The shaftless guide rail (53) and the support guide rod (54) are fixedly supported by a first clamp (57) and a second clamp (58). Both the first clamp (57) and the second clamp (58) can slide on the surface of the shaftless guide rail (53).

3. The SMT online AOI inspection device according to claim 2, characterized in that: The shaftless guide rail (53) is provided with a conductive slip ring (56), which can rotate on the outer surface of the shaftless guide rail (53) and is connected to the main board inside the electrical component mounting compartment (6).

4. The SMT inline AOI inspection device according to claim 3, characterized in that: The first clamp (57) and the second clamp (58) both include a guide rail slider (591) and a support slider (592). The guide rail slider (591) is disposed on the outer surface of the shaftless guide rail (53), and the guide rail slider (591) is driven by the shaftless guide rail (53) to slide along the axial direction of the shaftless guide rail (53). The support sliders (592) are respectively disposed on the outer surfaces of the two support guide rods (54), and the support sliders (592) can slide on the surface of the support guide rods (54); The tops of the guide slider (591) and the support slider (592) are jointly supported by an inverted T-shaped support plate (593).

5. The SMT inline AOI inspection device according to claim 4, characterized in that: Both of the two inverted T-shaped support plates (593) have a buffer plate (594) on their opposite sides, and the buffer plate (594) is elastic.

6. The SMT inline AOI inspection device according to claim 5, characterized in that: The buffer plate (594) includes a skin (5941) fixed to the outer surface of the inverted T-shaped support plate (593), and the skin (5941) has honeycomb holes (5942) inside.

7. The SMT inline AOI inspection device according to claim 4, characterized in that: The second fixture (58) has a circuit board support plate (595) on the side of the buffer plate (594) facing the first fixture (57), and the first fixture (57) has a support plate through groove (596) on the side of the buffer plate (594), and the circuit board support plate (595) is adapted to the support plate through groove (596).

8. The SMT inline AOI inspection device according to claim 7, characterized in that: The top of the circuit board tray (595) is flush with the top of the bottom T-shaped platform of the inverted T-shaped support plate (593).

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