A circuit board printing production line

Abstract

This utility model relates to the field of circuit board surface mount production line technology, and discloses a circuit board printing production line, which includes at least solder printing equipment, solder inspection equipment, and a board storage docking station. The board storage docking station includes a conveying mechanism, a board storage mechanism, a first sensor, and a control unit; the conveying mechanism includes a first conveying structure, a second conveying structure, and a third conveying structure arranged sequentially along the conveying direction; the board storage mechanism includes a storage rack; the first sensor is configured to sense the circuit board being conveyed to the third conveying structure; after receiving a defect signal fed back by the solder inspection equipment and a first sensing signal fed back by the first sensor, the control unit can control the second and third conveying structures to reverse the conveying of the circuit board until the first sensor stops feeding back the first sensing signal to the control unit, at which point the storage rack rises, and the support structure of the storage rack pushes the circuit board returned to the second conveying structure upward away from the second conveying structure and stores the circuit board.

Description

Technical Field

[0001] This utility model relates to the field of circuit board surface assembly production line technology, and in particular to a circuit board printing production line. Background Technology

[0002] Printed circuit boards (PCBs) are surface mount assembly lines used to mount or assemble components onto the surface of circuit boards. A typical PCB solder paste printing line includes a loading unit, printing equipment, inspection equipment, and component mounting equipment. The loading unit transports the circuit board to the printing equipment, where solder is applied to the corresponding positions on the board. After soldering, the printing equipment transports the board to the inspection equipment, which checks the quality of the solder application. After inspection, the inspection equipment transports the board to the mounting equipment, where components are mounted onto the board. Finally, the mounting equipment transports the board to other workstations.

[0003] Existing circuit board printing production lines generally do not have the function of automatically storing defective circuit boards. When the testing equipment detects a defective circuit board, it can only stop the machine and remove the circuit board, which results in low production line efficiency.

[0004] In summary, how to provide a circuit board printing technology that can automatically store defective circuit boards is an urgent problem to be solved in the field of circuit board surface mount production line technology. Utility Model Content

[0005] This utility model provides a circuit board printing production line that can solve the technical problem that defective circuit boards cannot be automatically stored during the solder paste printing process.

[0006] To solve the aforementioned technical problems, the present invention adopts the following technical solution:

[0007] A circuit board printing production line includes at least a solder printing machine, a solder inspection machine, and a board storage dock. The solder printing machine receives circuit boards provided by the solder printing machine and inspects the solder quality of the circuit boards. The board storage dock includes a conveying mechanism, a board storage mechanism, a first sensor, and a control unit. The conveying mechanism receives and conveys circuit boards provided by the solder inspection machine. The conveying mechanism includes a conveying drive assembly and two conveying structure groups symmetrically arranged. Each conveying structure group includes a first conveying structure, a second conveying structure, and a third conveying structure arranged sequentially along the conveying direction of the conveying mechanism. The first, second, and third conveying structures are configured to support the circuit boards. The conveying drive assembly is configured to drive the first, second, and third conveying structures to convey the circuit boards forward and backward along the conveying direction. The board storage mechanism includes a storage rack and a lifting drive motor. The storage rack is vertically movable on the conveyor. The structure includes a storage rack with a support structure, the position of which corresponds to the position of the second conveying structure. The output end of the lifting drive motor is connected to the storage rack via a linkage component to drive the storage rack to move up and down relative to the conveying mechanism. A first sensor is configured to sense the circuit board being conveyed to the third conveying structure and generate a corresponding first sensing signal. The control unit is electrically connected to the solder detection equipment, the first sensor, the conveying drive assembly, and the lifting drive motor via wires. After receiving the defect signal fed back by the solder detection equipment and the first sensing signal fed back by the first sensor, the control unit can control the conveying drive assembly to drive the second and third conveying structures to convey the circuit board in reverse. During the reverse conveying of the circuit board, when the first sensor stops feeding back the first sensing signal to the control unit, the control unit controls the lifting drive motor to drive the storage rack to rise, so that the support structure can push the circuit board returned to the second conveying structure upward away from the second conveying structure.

[0008] In one alternative embodiment, the first sensor is located between the two conveyor structure groups and below the inlet end of the third conveyor structure.

[0009] In one optional embodiment, the storage board docking station further includes a second sensor configured to sense the circuit board on the first conveying structure and generate a second sensing signal. During the reverse conveying of the circuit board, when the control unit receives the second sensing signal fed back by the second sensor, the control unit controls the conveying drive assembly to drive the first conveying structure, the second conveying structure, and the third conveying structure to convey the circuit board in the forward direction until the first sensor and the second sensor stop feeding back the first sensing signal and the second sensing signal to the control unit. Then, the control unit controls the lifting drive motor to drive the storage rack to rise so that the circuit board returned to the second conveying structure is pushed upward away from the second conveying structure by the support structure.

[0010] In one alternative embodiment, the second sensor is located between the two conveyor structure groups and below the exit end of the first conveyor structure.

[0011] In one alternative embodiment, the second sensor and the first sensor are aligned in the conveying direction of the conveying mechanism; both the first sensor and the second sensor are photoelectric sensors.

[0012] In one optional embodiment, the board receiving station further includes a scanning device for scanning board labels. The scanning device is located below the first conveying structure and between the two conveying structure groups. The scanning device is electrically connected to the control unit via a wire. When the control unit receives a defect signal from the solder detection equipment, the control unit controls the scanning device to scan the board labels on the first conveying structure.

[0013] In an optional embodiment, the conveying structure assembly further includes a support plate, the support plate having an inner sidewall, and the inner sidewalls of the support plates of the two conveying structure assemblies facing each other; the storage rack includes two vertical plates, the two vertical plates being slidably mounted on the inner sidewalls of the support plates of the two conveying structure assemblies respectively; the vertical plates include a rack structure extending in the vertical direction;

[0014] The linkage assembly includes a first linkage shaft, a worm gear, a worm wheel, and two linkage gears. The two ends of the first linkage shaft are rotatably connected to two support plates. The two linkage gears are respectively sleeved on the two ends of the first linkage shaft and mesh with the rack structure of the two support plates. The lifting drive motor is fixed to one of the two support plates. The worm gear is sleeved on the output shaft of the lifting drive motor, and the worm wheel is sleeved on the first linkage shaft. The worm wheel and the worm gear mesh.

[0015] In one optional embodiment, the second conveying structure includes a plurality of conveying wheels disposed on the inner sidewall of the support plate, the plurality of conveying wheels being arranged sequentially and at intervals along the conveying direction of the conveying mechanism;

[0016] The support structure includes multiple support blocks protruding from the two vertical plates; the multiple support blocks are located on the side of the vertical plates facing away from the support plates and are arranged in an array, with the support blocks in each row arranged sequentially at intervals along the conveying direction and the support blocks in each column arranged sequentially at intervals along the vertical direction; the vertical plates are provided with multiple oblong holes; an oblong hole is provided between two adjacent columns of support blocks; the oblong hole extends from above the uppermost support block downwards to below the lowermost support block; each conveying wheel is located in each oblong hole in turn.

[0017] In one optional embodiment, the conveying drive assembly includes a conveying drive motor, a second connecting shaft, a first pulley set, and two second pulley sets; both ends of the second connecting shaft are rotatably connected to two support plates, and both ends of the second connecting shaft are connected to multiple conveying wheels on the two support plates through a second pulley set; the output shaft of the conveying drive motor is connected to the second connecting shaft through the first pulley set.

[0018] The first pulley assembly includes a first connecting pulley, a second connecting pulley, and a first connecting belt; the first connecting pulley is mounted on the output shaft of the conveyor drive motor, and the second connecting pulley is mounted on the second connecting shaft; the first connecting belt is mounted on the first connecting pulley and the second connecting pulley; the second pulley assembly includes a first driving pulley, multiple first driven pulleys, a first connecting belt, and a second connecting belt; the first driving pulley is mounted on the second connecting shaft, and each first driven pulley is mounted on the shaft of each conveyor wheel in turn; the first connecting belt is mounted on each first driven pulley and the first driving pulley.

[0019] In one optional embodiment, the first conveying structure includes two first tensioning rollers and a first transmission belt; the two first tensioning rollers are disposed on the inner sidewall of the support plate; the first transmission belt is sleeved on the two first tensioning rollers; a third connecting roller is sleeved on the shaft of one of the two first tensioning rollers, and a second connecting belt is sleeved on the third connecting roller;

[0020] The third conveying structure includes two second tensioning pulleys and a second transmission belt. The two second tensioning pulleys are located on the inner side wall of the support plate, and the second transmission belt is sleeved on the two second tensioning pulleys. A fourth connecting pulley is sleeved on the shaft of one of the two second tensioning pulleys, and the second connecting belt is sleeved on the fourth connecting pulley.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] This invention employs solder printing equipment to print circuit boards, and solder inspection equipment to detect the printing quality of the solder printing equipment. When the solder inspection equipment transports the circuit board to the conveying mechanism of the board storage dock, the circuit board is transported by a first conveying structure, a second conveying structure, and a third conveying structure. When the solder inspection equipment detects a defective circuit board, it sends a defect signal to the control unit of the board storage dock. When the defective circuit board is transported to the third conveying structure, a first sensor detects the circuit board on the third conveying structure and generates a first sensing signal. After receiving the first sensing signal from the first sensor, the control unit controls the conveying drive assembly to drive the second and third conveying structures to transport the circuit board in reverse until the first sensor no longer detects the circuit board and stops feeding back the first sensing signal to the control unit. This indicates that the circuit board has left the third conveying structure and has been returned to the second conveying structure. Subsequently, the control unit controls the lifting drive motor to raise the storage rack, and the support structure pushes the circuit board from the second conveying structure upwards and stores it. By adopting the aforementioned technical solution, this utility model can automatically identify and store defective circuit boards. Furthermore, during the storage of defective circuit boards, the defective circuit boards are transported to the second conveying structure with greater accuracy, so that the storage rack can push the defective circuit boards away from the second conveying structure from the top, thereby reducing the risk of the storage rack failing to store the circuit boards. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the storage board docking station according to an embodiment of this application;

[0024] Figure 2 This is an embodiment of the present application. Figure 1 Exploded view of the structure;

[0025] Figure 3 This is one of the schematic diagrams of the combined structure of the conveying mechanism and the frame platform according to an embodiment of this application;

[0026] Figure 4 This is a second schematic diagram of the combined structure of the conveying mechanism and the frame platform according to an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the circuit board conveying process according to an embodiment of this application;

[0028] Figure 6 This is one of the structural schematic diagrams of the conveying mechanism according to an embodiment of this application;

[0029] Figure 7 This is a second schematic diagram of the conveying mechanism according to an embodiment of this application;

[0030] Figure 8 This is a schematic diagram of the conveying structure assembly according to an embodiment of this application;

[0031] Figure 9 This is an embodiment of the present application. Figure 8 A schematic diagram of the structure of part A;

[0032] The image is labeled as follows:

[0033] 10. Storage tray docking station; 11. Control unit;

[0034] 20. Conveying structure assembly; 21. First conveying structure; 211. First tensioning pulley; 212. First mounting base; 213. First transmission belt; 22. Second conveying structure; 221. Conveying wheel; 23. Third conveying structure; 231. Second tensioning pulley; 232. Second transmission belt; 233. Second mounting base;

[0035] 30. Frame; 31. Mounting plate; 32. Guide rod;

[0036] 40. Vertical plate; 41. Rack and pinion structure; 42. Support block; 421. Vertical wall; 422. Horizontal wall; 43. Waist-shaped hole;

[0037] 51. Lifting drive motor; 52. Worm gear; 53. Worm wheel; 54. Connecting gear; 55. First connecting shaft;

[0038] 61. Conveyor drive motor; 62. First connecting belt; 63. Second connecting belt; 64. Second connecting shaft; 65. First driven pulley;

[0039] 70. Support plate;

[0040] 81. Fourth linkage wheel; 82. Third linkage wheel;

[0041] 90. Scanning device;

[0042] 101. First sensor; 102. Second sensor. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In the description of this application, it should be understood that if terms such as “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0046] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] This embodiment provides a circuit board printing production line for printing circuit boards. The circuit board printing production line includes at least solder printing equipment (not shown in the figure), solder inspection equipment (not shown in the figure), and a board storage and connection table 10 (such as...). Figure 1 and Figure 2 (As shown). Both the solder printing equipment and the solder testing equipment can be commonly used in the industry. To facilitate a better understanding of the technical solution of this application by those skilled in the art, the structure and working principle of the solder printing equipment and the solder testing equipment will be briefly described below:

[0048] Please combine Figure 5Firstly, solder printing equipment in the industry generally includes a conveying module and a printing module. The conveying module can be a powered conveyor belt D1, which transports the circuit board to the printing module below, where the printing module prints the circuitry. After printing, the powered conveyor belt D1 continues to transport the circuit board forward. Solder inspection equipment includes a conveying module and an inspection module. The conveying module of the solder inspection equipment can also be a powered conveyor belt D2. The board inlet end of the powered conveyor belt D2 is connected to the board outlet end of the powered conveyor belt of the solder printing equipment. The powered conveyor belt D1 pushes the circuit board onto the powered conveyor belt D2, which then transports the circuit board forward to the area below the inspection module. The inspection module inspects the solder quality of the circuit board, including but not limited to: solder thickness, solder position, and missing solder. If the solder quality is acceptable, the control module of the solder inspection equipment generates a pass signal; if the solder quality is unacceptable, the control module generates a defect signal. After inspection, the power conveyor belt D2 of the solder testing equipment transports the circuit boards to the board storage dock 10. The board storage dock 10 is used to transport qualified circuit boards to other equipment or to a collection container for unified collection. The board storage dock 10 can also store unqualified circuit boards to prevent them from being transported to other processing equipment on the production line.

[0049] In some embodiments, the circuit board printing production line may also add board loading equipment and other processing equipment as needed. The board loading equipment is used to load the solder printing equipment onto the board, while the other processing equipment is connected to the board receiving platform 10 to receive the circuit boards conveyed by the board receiving platform 10 and to perform other processing on the circuit boards.

[0050] Please see Figures 1 to 4 In some embodiments, the storage board docking station 10 includes a conveying mechanism, a storage mechanism, a first sensor 101, and a control unit 11.

[0051] The conveying mechanism includes a conveying drive assembly and two conveying structure groups 20, which are symmetrically arranged. Each conveying structure group 20 includes a first conveying structure 21, a second conveying structure 22, and a third conveying structure 23 arranged sequentially along the conveying direction F of the conveying mechanism. The first conveying structure 21, the second conveying structure 22, and the third conveying structure 23 are configured to support the circuit board. Specifically, the first conveying structure 21 is spliced ​​with or spaced apart from the exit end of the power conveyor belt of the soldering inspection equipment, and the power conveyor belt of the soldering inspection equipment pushes the circuit board toward the first conveying structure 21. Under the driving action of the conveying drive assembly, the first conveying structure 21 pushes the circuit board toward the second conveying structure 22, and the second conveying structure 22 pushes the circuit board toward the third conveying structure 23, thereby realizing the forward conveying of the circuit board along the conveying direction F. In some scenarios, the conveying drive assembly can also drive the first conveying structure 21, the second conveying structure 22, and the third conveying structure 23 to convey the circuit board in the opposite direction.

[0052] The storage mechanism includes a storage rack and a lifting drive motor 51. The storage rack is movably mounted on the conveying mechanism and has a support structure. The output end of the lifting drive motor 51 is connected to the storage rack via a linkage component. The lifting drive motor 51 is used to drive the storage rack to move up and down relative to the conveying mechanism. When the storage rack moves upward, the support structure can push the circuit board away from the second conveying structure 22 and store the circuit board.

[0053] The first sensor 101 is configured to sense the circuit board being transported to the third transport structure 23 and generate a corresponding first sensing signal.

[0054] The control unit 11 can be a PLC controller, MCU controller, or other micro controller capable of controlling the operation of the equipment. The control unit 11 is electrically connected via wires to the control module of the solder testing equipment, the first sensor 101, the lifting drive motor 51, and the conveying drive assembly and conveying mechanism. It receives signals from the first sensor 101 and controls the lifting drive motor 51 and the conveying mechanism.

[0055] In addition to the components listed above, the storage dock 10 may also include other common components, such as electronic control systems and alarm devices, which will not be listed here.

[0056] The following section describes part of the working process of the technical solution in this embodiment, using an application scenario as an example:

[0057] Application Scenario 1: In this scenario, no board storage is required. The workflow includes:

[0058] Please combine Figure 5The power transmission belt D2 of the solder testing equipment transports qualified circuit boards to the first conveyor structure 21. The first conveyor structure 21 then sends the circuit boards to the second conveyor structure 22, which in turn sends them to the third conveyor structure 23. A board exit sensor (not shown in the diagram) can be installed at the exit end of the third conveyor structure 23. When a circuit board is transported to the exit end of the third conveyor structure 23, the board exit sensor detects the circuit board, generates a corresponding sensing signal, and feeds this signal back to the control unit 11. Upon receiving the sensing signal, the control unit 11 controls the conveyor drive assembly to stop driving the first, second, and third conveyor structures 21 and 22, causing the circuit board to remain on the third conveyor structure 23, waiting for the next station's equipment to send an exit signal to the control unit 11. Then, the circuit board on the third conveyor structure 23 is sent to the next station's equipment. In this application scenario, the board storage and connection station transports 10 circuit boards, eliminating the need for board storage.

[0059] Application Scenario 2: Please continue to combine Figure 5 In this scenario, circuit boards need to be stored. Due to the inertia during the movement of the circuit boards, defective circuit boards often cannot accurately stop on the second conveying structure 22. Under the influence of inertia, they move forward a certain distance, causing part of the circuit board to move outside the second conveying structure 22. The third conveying structure 23 can support the part of the circuit board that has moved outside the second conveying structure 22, preventing the circuit board from falling due to imbalance. At this time, since the circuit board is not completely stopped on the second conveying structure 22, if the support structure of the storage rack directly lifts the circuit board, the circuit board is at risk of falling due to imbalance. In order to ensure that the circuit board is completely stopped on the second conveying structure 22, this embodiment adopts the following working process:

[0060] After the soldering inspection equipment detects a defective circuit board, it generates a defect signal and transmits the defect signal to the control unit 11 of the board receiving platform 10. Simultaneously, the power conveyor belt D2 of the soldering inspection equipment transports the defective circuit board to the first conveyor structure 21. The control unit 11 controls the conveyor drive assembly to drive the first conveyor structure 21, the second conveyor structure 22, and the third conveyor structure 23 forward to transport the defective circuit board until it reaches (or partially reaches, for example, the front end of the circuit board reaches) the third conveyor structure 23. The first sensor 101 senses the circuit board and generates a first sensing signal, which is fed back to the control unit 11. After receiving the defect signal and the first sensing signal, the control unit 11 controls the conveyor drive assembly to drive the first conveyor structure 21, the second conveyor structure 22, and the third conveyor structure 23 in reverse to transport the circuit board until the first sensor 101 no longer senses the circuit board and stops feeding back the first sensing signal to the control unit 11, indicating that the circuit board has completely detached from the third conveyor structure 23 and has been returned to the second conveyor structure 22. Control unit 11 controls lifting drive motor 51 to move the storage rack upwards. The support structure of the storage rack pushes the circuit board away from the second conveying structure 22, thereby storing the circuit board above the second conveying structure 22. In this application scenario, the circuit board printing production line of this embodiment can identify defective circuit boards and automatically store them without stopping the machine. Furthermore, during the storage of defective circuit boards, the defective circuit boards are first precisely positioned on the second conveying structure 22 so that the storage rack can accurately lift the defective circuit boards upwards, pushing them away from the second conveying structure 22, reducing the risk of the storage rack failing to lift the circuit boards.

[0061] Please continue reading. Figures 3 to 5 In some embodiments, a second sensor 102 is provided to prevent the defective circuit board from being partially or completely returned to the first conveying structure 21 during the reverse conveying process. The second sensor 102 is configured to sense the circuit board on the first conveying structure 21 and generate a second sensing signal. During the reverse conveying process, when the control unit 11 receives the second sensing signal from the second sensor 102, the control unit 11 controls the conveying drive assembly to drive the first conveying structure 21, the second conveying structure 22, and the third conveying structure 23 to convey the circuit board in the forward direction until the first sensor 101 and the second sensor 102 stop feeding the first and second sensing signals back to the control unit 11. This indicates that the defective circuit board is completely located on the second conveying structure 22 and is completely supported by the second conveying structure 22. During the subsequent lifting of the circuit board by the storage rack, the risk of the circuit board becoming unbalanced and falling during the lifting process due to the circuit board's position deviating from the second conveying structure 22 can be reduced.

[0062] In some embodiments, the mounting positions and mounting methods of the first sensor 101 and the second sensor 102 can adopt the following schemes:

[0063] The first sensor 101 is located between the two conveying structure groups 20 and below the inlet end of the third conveying structure 23. The inlet end of the third conveying structure 23 can be understood as the end of the third conveying structure 23 closest to the second conveying structure 22, while the end of the third conveying structure 23 furthest from the second conveying structure 22 is the outlet end. Specifically, the first sensor 101 is connected to the conveying structure group 20 via a connecting rod and is suspended below the inlet end of the third conveying structure 23. The first sensor 101 senses the circuit board in a non-contact manner, thus avoiding interference with the circuit board conveying process.

[0064] The second sensor 102 is located between the two conveying structure groups 20 and below the output end of the first conveying structure 21. The output end of the first conveying structure 21 can be understood as the end of the first conveying structure 21 closer to the second conveying structure 22, while the end farther from the second conveying structure 22 is the input end of the first conveying structure 21. Specifically, the second sensor 102 is connected to the conveying structure group 20 via a connecting rod and is suspended below the output end of the first conveying structure 21. The second sensor 102 senses the circuit board in a non-contact manner, thus avoiding interference with the circuit board conveying process.

[0065] The second sensor 102 and the first sensor 101 are aligned in the conveying direction F of the conveying mechanism. This ensures a neat structural layout and guarantees that both the first sensor 101 and the second sensor 102 can sense the same location on the circuit board, improving the consistency of their sensing signals. This avoids discrepancies in sensing results, such as one sensor detecting the circuit board while the other does not, or one sensor detecting the circuit board earlier while the other detects it later.

[0066] In some embodiments, the first sensor 101 and the second sensor 102 are both photoelectric sensors. Preferably, both are backlight-suppressing photoelectric sensors, which can avoid interference from the color of the circuit board and improve the accuracy of the sensing results.

[0067] In some embodiments, the board receiving platform 10 further includes a frame platform 30 and a housing. A window is provided on each of the opposite sides of the housing. The board inlet portion of the first conveying structure 21 is exposed through one window of the housing for connection with the power conveyor belt D2 of the solder testing equipment. The board outlet portion of the third conveying structure 23 is exposed through the window on the other side of the housing for docking with other equipment, such as the conveyor belt of a pick-and-place machine. The frame platform 30 is located inside the housing and includes two symmetrically spaced mounting plates 31. The two mounting plates 31 are fixed to the inner wall of the housing by fasteners. Two guide rods 32 are provided between the two mounting plates 31, arranged side-by-side along the conveying direction F, with both ends of the guide rods 32 connected to the two mounting plates 31.

[0068] Please combine Figures 6 to 8 The conveying structure assembly 20 also includes a support plate 70, which is connected to a guide rod 32. Specifically, the guide rod 32 passes through the support plate 70, and the support plate 70 is suspended between two mounting plates 31 via the guide rod 32. The support plate 70 includes an inner sidewall, and the inner sidewalls of the support plates 70 of the two conveying structure assemblies 20 are opposite to each other. The second conveying structure 22 includes a plurality of conveying wheels 221 disposed on the inner sidewall of the support plate 70. The plurality of conveying wheels 221 are arranged sequentially and at intervals along the conveying direction F of the conveying mechanism. Specifically, a rubber ring is fitted on the circumferential sidewall of the conveyor wheel 221. The rubber ring can be made of soft materials such as rubber or silicone. Part of the rubber ring is embedded in the circumferential sidewall of the conveyor wheel 221, and the other part is exposed on the circumferential sidewall of the conveyor wheel 221. The rubber ring can abut against the circuit board. When the conveyor wheel 221 drives the rubber ring to rotate, the friction between the rubber ring and the circuit board is used to transport the circuit board forward. To a certain extent, this can reduce the relative sliding between the circuit board and the conveyor wheel 221, which would affect the accuracy of the conveyor wheel 221 in transporting the circuit board.

[0069] In some embodiments, the conveying drive assembly may drive the second conveying structure 22 in the following manner:

[0070] The conveying drive assembly includes a conveying drive motor 61, a second connecting shaft 64, two second bearings, a first pulley set, and two second pulley sets. The two ends of the second connecting shaft 64 are rotatably connected to two mounting plates 31, and the second connecting shaft 64 is rotatably connected to two support plates 70 via the two second bearings. The radial cross-section of the second connecting shaft 64 is polygonal, and the shape of the mounting holes of the second bearings matches the shape of the second connecting shaft 64. This technique allows the second connecting shaft 64 to rotate relative to the support plate 70, and also allows the support plate 70 to move relative to the first connecting shaft 55. The output shaft of the conveying drive motor 61 is connected to the second connecting shaft 64 via the first pulley set, and the two ends of the second connecting shaft 64 are connected to multiple conveying wheels 221 on the two support plates 70 via the two second pulley sets. When the conveying drive motor 61 drives the second connecting shaft 64 to rotate, the second connecting shaft can drive the multiple conveying wheels 221 on the two support plates 70 to rotate synchronously via the second pulley sets.

[0071] Specifically, the first pulley assembly includes a first connecting pulley, a second connecting pulley, and a first connecting belt 62; the first connecting pulley is mounted on the output shaft of the conveyor drive motor 61, and the second connecting pulley is mounted on the second connecting shaft 64; the first connecting belt 62 is mounted on the first connecting pulley and the second connecting pulley.

[0072] The second pulley assembly includes a first driving pulley, multiple first driven pulleys 65, a first connecting belt 62, and a second connecting belt 63. The first driving pulley is mounted on the second connecting shaft 64, and each first driven pulley 65 is correspondingly mounted on the shaft of each conveyor wheel 221. The first connecting belt 62 is mounted on each first driven pulley 65 and the first driving pulley. When the conveyor drive motor 61 rotates, it can drive the second connecting shaft 64 to rotate, and the second connecting shaft 64 drives the conveyor wheels 221 on the two support plates 70 to rotate synchronously.

[0073] In some embodiments, the first conveying structure 21 is a conveyor belt, driven by a conveying drive assembly, and synchronously performs the action of conveying the circuit board with the second conveying structure 22. The first conveying structure 21 includes a first mounting base 212, two first tension rollers 211, and a first conveyor belt 213. The two first tension rollers 211 are disposed inside the support plate 70 via the first mounting base 212. Specifically, the first mounting base 212 extends along the conveying direction F, with one end fixed to the support plate 70 and the other end suspended. The two first tension rollers 211 are disposed inside the first mounting base 212. The first conveyor belt 213 is sleeved on the two... The circuit board is supported and transported on the first tensioning roller 211 by the first transmission belt 213. A third connecting roller 82 is sleeved on the shaft of one of the two first tensioning rollers 211, and a second connecting belt 63 is sleeved on the third connecting roller 82. This allows the third connecting roller 82 to rotate synchronously with the conveyor roller 221. The third connecting roller 82 drives the corresponding first tensioning roller 211 to rotate, and the first tensioning roller 211 drives the first transmission belt 213 to move, so that the first transmission belt 213 can transport the circuit board. Of course, in other embodiments, the first conveying structure 21 can also be a commercially available self-powered conveyor belt.

[0074] The third conveying structure 23 is also a conveyor belt, driven by a conveying drive assembly, and synchronously performs the action of conveying the circuit board with the second conveying structure 22. The third conveying structure 23 includes a second mounting base 233, two second tension pulleys 231, and a second conveyor belt 232. The two second tension pulleys 231 are located inside the support plate 70 via the second mounting base 233. Specifically, the second mounting base 233 extends along the conveying direction F, with one end fixed to the side of the support plate 70 away from the first mounting base 212, and the other end suspended. The two second tension pulleys 231 are located on the second mounting base 233. Inside the conveyor belt 232, the second conveyor belt 232 is fitted onto the two second tensioning pulleys 231. A fourth connecting pulley 81 is fitted onto the shaft of one of the two second tensioning pulleys 231, and the second connecting belt 63 is fitted onto the fourth connecting pulley 81. This allows the fourth connecting pulley 81 to rotate synchronously with the conveyor wheel 221. The fourth connecting pulley 81 drives the corresponding second tensioning pulley 231 to rotate, and the second tensioning pulley 231 drives the second conveyor belt 232 to move, so that the second conveyor belt 232 can transport the circuit board. Of course, in other embodiments, the third conveying structure 23 can also be a commercially available self-powered conveyor belt.

[0075] In some embodiments, the board storage mechanism stores defective circuit boards using the following technical means:

[0076] The storage rack includes two vertical plates 40, which are slidably mounted vertically on the inner sidewalls of the support plates 70 of the two conveying structure assemblies 20. Specifically, each vertical plate 40 has at least two sliders on the side facing the support plate 70. The sliders are fixed to the vertical plate 40 by fasteners and are arranged side by side along the conveying direction F. Each support plate 70 has at least two slide rails on the side facing the vertical plate 40. The slide rails are connected to the support plate 70 by fasteners and have grooves. The two sliders are respectively engaged in the grooves of the two slide rails to slide in contact with the grooves.

[0077] The vertical plate 40 includes a rack structure 41 extending in the vertical direction. The rack structure 41 is located on one side of the vertical plate 40. The rack structure 41 can be integrally formed with the vertical plate 40, or it can be a separate component fixed to the vertical plate 40 by fasteners. In other embodiments, the installation position of the rack structure 41 on the vertical plate 40 can be changed according to actual design requirements. For example, the rack structure 41 can be located in the middle of the vertical plate 40.

[0078] The linkage assembly includes a first linkage shaft 55, a worm gear 52, a worm wheel 53, and two linkage gears 54. The two ends of the first linkage shaft 55 are rotatably connected to two support plates 70. The two linkage gears 54 are respectively sleeved on both ends of the first linkage shaft 55 and mesh with the rack structure 41 of the two support plates 70. A lifting drive motor 51 is fixed to the frame 30. The worm gear 52 is sleeved on the output shaft of the lifting drive motor 51, and the worm wheel 53 is sleeved on the first linkage shaft 55, meshing with the worm gear 52. The shaft of the lifting drive motor 51 drives the worm gear 52 to rotate, which in turn drives the worm wheel 53 to rotate. The worm wheel 53, through the first linkage shaft 55, drives the two linkage gears 54 to rotate. The two linkage gears 54 respectively drive the gear structures of the two vertical plates 40 to move up and down, thereby causing the corresponding vertical plates 40 to move up and down. In the aforementioned scheme, the lifting drive motor 51 can drive the first connecting shaft 55 to rotate relative to the support plate 70 more accurately and stably through the transmission of worm gear 53-worm 52. The vertical plate 40 is driven to move up and down by the transmission of connecting gear 54 and gear structure, so that the vertical plate 40 can move up and down more stably and accurately.

[0079] The support structure includes multiple support blocks 42 protruding from the two vertical plates 40. The support blocks 42 are located on the side of the vertical plate 40 facing away from the support plate 70 and are arranged in an array. Each row of support blocks 42 is spaced apart along the conveying direction F, and each column of support blocks 42 is spaced apart along the vertical direction. The vertical plate 40 has multiple oblong holes 43; an oblong hole 43 is provided between two adjacent columns of support blocks 42. The oblong holes 43 extend downwards from above the uppermost support block 42 to below the lowermost support block 42. Each conveying wheel 221 is correspondingly located within each oblong hole 43. When the vertical plate 40 moves up and down, each oblong hole 43 can avoid each conveying wheel 221, and each conveying wheel 221 can move relative to each oblong hole 43. This structure makes the fit between the vertical plate 40 and the second conveying structure 22 more compact.

[0080] Furthermore, please combine Figure 9 The support block 42 has an "L"-shaped bearing part on the side facing away from the vertical plate 40. The bearing part includes a vertical wall 421 and a transverse wall 422 extending from the bottom side of the vertical wall 421 in the direction facing away from the vertical plate 40. The transverse wall 422 lifts up and supports the defective circuit board.

[0081] The principle of the support structure lifting and storing defective circuit boards is as follows: When the vertical plate 40 moves upward, the uppermost support block 42 lifts the circuit board upward, causing it to be lifted away from the conveyor wheel 221, and the circuit board is temporarily stored on the uppermost support block 42. When another defective circuit board is conveyed to the conveyor wheel 221, the vertical plate 40 continues to move upward a preset distance, causing the next row of support blocks 42 to lift the circuit board upward, causing it to be lifted away from the conveyor wheel 221 and stored on that row of support blocks 42. This process continues until all rows of support blocks 42 contain circuit boards. The cabinet door on the housing can be opened manually, the circuit boards can be manually removed from the storage rack, and then the reset button can be manually pressed to move the two vertical plates 40 of the storage rack downward to their initial state.

[0082] Please continue reading. Figures 3 to 5In some embodiments, the board receiving platform 10 further includes a scanning device 90. The scanning device 90 is located below the first conveying structure 21 and between the two conveying structure groups 20. Specifically, the scanning device 90 is fixed to the inner wall of the housing by a bracket. The bracket can be an angle-adjustable component formed by multiple connecting rods, or an angle-non-adjustable component composed of connecting rods. The scanning device 90 is electrically connected to the control unit 11 via wires. The scanning device 90 scans the labels on defective circuit boards, obtains the marking information contained in the labels, and transmits the marking information to the control unit 11. The control unit 11 stores the marking information in a storage module, such as in a database or a separately configured storage medium, for easy retrieval later. The scanning device 90 can use commonly used scanning components in the industry; the specific structure and working principle of the scanning body will not be described in detail here.

[0083] The working process of the scanning device 90 includes: when the control unit 11 receives the defect signal fed back by the solder inspection equipment, before the unqualified circuit board is stored, the control unit 11 controls the scanning device 90 to scan the label of the unqualified circuit board on the first conveying structure 21. The scanning device 90 feeds back the label information to the control unit 11 so that the control unit 11 can collect and count the number of unqualified circuit boards and the corresponding defect categories. Based on the information of the unqualified circuit boards collected by the control unit 11, the operator can judge the yield of the circuit board printing and the defects in the soldering process, and thus make targeted improvements.

[0084] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0085] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A circuit board printing line comprising at least a solder printing device, a solder inspection device and a board storage docking station (10), said solder printing device being arranged to receive a circuit board provided by said solder printing device and to inspect the solder quality of the circuit board, characterized in that, The storage plate docking station (10) includes: A conveying mechanism for receiving and conveying circuit boards provided by the solder testing equipment, the conveying mechanism including a conveying drive assembly and two conveying structure groups (20), the two conveying structure groups (20) being symmetrically arranged, each conveying structure group (20) including a first conveying structure (21), a second conveying structure (22) and a third conveying structure (23) arranged sequentially along the conveying direction of the conveying mechanism; the first conveying structure (21), the second conveying structure (22) and the third conveying structure (23) being configured to support the circuit board, the conveying drive assembly being configured to drive the first conveying structure (21), the second conveying structure (22) and the third conveying structure (23) to convey the circuit board in the forward and reverse directions along the conveying direction; The storage mechanism includes a storage rack and a lifting drive motor (51). The storage rack is movably disposed on the conveying mechanism. The storage rack is provided with a support structure. The position of the support structure corresponds to the position of the second conveying structure (22). The output end of the lifting drive motor (51) is connected to the storage rack through a linkage component to drive the storage rack to move up and down relative to the conveying mechanism. A first sensor (101) is configured to sense the circuit board being transported to the third transport structure (23) and generate a corresponding first sensing signal; The control unit (11) is electrically connected to the solder testing equipment, the first sensor (101), the conveying drive assembly, and the lifting drive motor (51) via wires. After receiving the defect signal fed back by the solder testing equipment and the first sensing signal fed back by the first sensor (101), the control unit (11) can control the conveying drive assembly to drive the second conveying structure (22) and the third conveying structure (23) to reverse convey the circuit board. During the reverse conveying of the circuit board, when the first sensor (101) stops feeding back the first sensing signal to the control unit (11), the control unit (11) controls the lifting drive motor (51) to drive the storage rack to rise so that the support structure can push the circuit board returned to the second conveying structure (22) upward away from the second conveying structure (22).

2. The circuit board printing line of claim 1, wherein The first sensor (101) is located between the two conveying structure groups (20) and below the inlet end of the third conveying structure (23).

3. The circuit board printing production line as described in claim 2, characterized in that, The storage board docking station (10) also includes a second sensor (102), which is configured to sense the circuit board on the first conveying structure (21) and generate a second sensing signal. During the reverse conveying of the circuit board, when the control unit (11) receives the second sensing signal fed back by the second sensor (102), the control unit (11) controls the conveying drive assembly to drive the first conveying structure (21), the second conveying structure (22) and the third conveying structure (23) to convey the circuit board in the forward direction until the first sensor (101) and the second sensor (102) stop feeding back the first sensing signal and the second sensing signal to the control unit (11). Then, the control unit (11) controls the lifting drive motor (51) to drive the storage rack to rise so that the support structure can push the circuit board returned to the second conveying structure (22) upward away from the second conveying structure (22).

4. The circuit board printing line of claim 3, wherein The second sensor (102) is located between the two conveying structure groups (20) and below the exit end of the first conveying structure (21).

5. The circuit board printing line of claim 4, wherein, The second sensor (102) and the first sensor (101) are aligned in the conveying direction of the conveying mechanism; both the first sensor (101) and the second sensor (102) are photoelectric sensors.

6. A circuit board printing line according to any one of claims 1-5, characterized in that The board receiving platform (10) also includes a scanning device (90) for scanning the board labels. The scanning device (90) is located below the first conveying structure (21) and between the two conveying structure groups (20). The scanning device (90) is electrically connected to the control unit (11) via a wire. When the control unit (11) receives a defect signal from the solder detection device, the control unit (11) controls the scanning device (90) to scan the board labels on the first conveying structure (21).

7. The circuit board printing line of claim 6, wherein The conveying structure assembly (20) further includes a support plate (70), the support plate (70) includes an inner sidewall, and the inner sidewalls of the support plates (70) of the two conveying structure assemblies (20) are opposite to each other; the storage rack includes two vertical plates (40), the two vertical plates (40) are respectively slidably mounted on the inner sidewalls of the support plates (70) of the two conveying structure assemblies (20) in a vertically movable manner; the vertical plate (40) includes a rack structure (41) extending in the vertical direction. The linkage assembly includes a first linkage shaft (55), a worm (52), a worm wheel (53), and two linkage gears (54); the two ends of the first linkage shaft (55) are rotatably connected to the two support plates (70), and the two linkage gears (54) are respectively sleeved on the two ends of the first linkage shaft (55) and mesh with the rack structure (41) of the two support plates (70); the lifting drive motor (51) is fixed to one of the two support plates (70), the worm (52) is sleeved on the output shaft of the lifting drive motor (51), the worm wheel (53) is sleeved on the first linkage shaft (55), and the worm wheel (53) and the worm (52) mesh.

8. The circuit board printing line of claim 7, wherein, The second conveying structure (22) includes a plurality of conveying wheels (221) disposed on the inner sidewall of the support plate (70), the plurality of conveying wheels (221) being arranged sequentially and at intervals along the conveying direction of the conveying mechanism; The support structure includes a plurality of support blocks (42) protruding from the two vertical plates (40); the plurality of support blocks (42) are located on the side of the vertical plate (40) facing away from the support plate (70) and are arranged in an array, with the support blocks (42) in each row arranged sequentially at intervals along the conveying direction, and the support blocks (42) in each column arranged sequentially at intervals along the vertical direction; the vertical plate (40) is provided with a plurality of waist-shaped holes (43); a waist-shaped hole (43) is provided between two adjacent columns of support blocks (42); the waist-shaped hole (43) extends downward from above the uppermost support block (42) to below the lowermost support block (42); each of the conveying wheels (221) is located in each of the waist-shaped holes (43) in turn.

9. The circuit board printing line of claim 8, wherein, The conveying drive assembly includes a conveying drive motor (61), a second connecting shaft, a first pulley set, and two second pulley sets; the two ends of the second connecting shaft are rotatably connected to the two support plates (70), and the two ends of the second connecting shaft are respectively connected to a plurality of conveying wheels (221) on the two support plates (70) through a second pulley set; the output shaft of the conveying drive motor (61) is connected to the second connecting shaft through the first pulley set; The first pulley group includes a first connecting pulley, a second connecting pulley, and a first connecting belt (62); the first connecting pulley is sleeved on the output shaft of the conveying drive motor (61), and the second connecting pulley is sleeved on the second connecting shaft; the first connecting belt (62) is sleeved on the first connecting pulley and the second connecting pulley; the second pulley group includes a first driving pulley, a plurality of first driven pulleys (65), a first connecting belt (62), and a second connecting belt (63); the first driving pulley is sleeved on the second connecting shaft, and each of the first driven pulleys (65) is correspondingly sleeved on the shaft of each of the conveying wheels (221); the first connecting belt (62) is sleeved on each of the first driven pulleys (65) and the first driving pulley.

10. The circuit board printing line of claim 9, wherein, The first conveying structure (21) includes two first tensioning pulleys (211) and a first transmission belt (213); the two first tensioning pulleys (211) are disposed on the inner sidewall of the support plate (70); the first transmission belt (213) is sleeved on the two first tensioning pulleys (211); a third connecting pulley (82) is sleeved on the shaft of one of the two first tensioning pulleys (211), and the second connecting belt (63) is sleeved on the third connecting pulley (82). The third conveying structure (23) includes two second tensioning rollers (231) and a second transmission belt (232). The two second tensioning rollers (231) are located on the inner sidewall of the support plate (70), and the second transmission belt (232) is sleeved on the two second tensioning rollers (231). A fourth connecting roller (81) is sleeved on the shaft of one of the two second tensioning rollers (231), and the second connecting belt (63) is sleeved on the fourth connecting roller (81).

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