Circuit board printing production line

Abstract

The invention relates to the technical field of circuit board surface assembly production lines, and discloses a circuit board printing production line which at least comprises soldering tin printing equipment, soldering tin detection equipment and a board storage connection table. The board storage connection table comprises a conveying mechanism, a board storage mechanism, a first sensor and a control unit; the conveying mechanism comprises a first conveying structure, a second conveying structure and a third conveying structure which are sequentially arranged in the conveying direction. The plate storage mechanism comprises a storage frame; the first sensor is configured to sense the circuit board conveyed to the third conveying structure; after the control unit receives a defect signal fed back by the soldering tin detection equipment and a first induction signal fed back by the first inductor, the control unit can control the second conveying structure and the third conveying structure to reversely convey the circuit board until the first inductor stops feeding back the first induction signal to the control unit, and the storage frame ascends; and the supporting structure of the storage rack upwards ejects the circuit board returned to the second conveying structure away from the second conveying structure and stores the circuit board.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit board surface assembly production line, and particularly relates to a circuit board printing production line. BACKGROUND

[0002] The printed circuit board is also called PCB (Printed Circuit Board), and the printed circuit board surface assembly production line is used for mounting or assembling components on the surface of the circuit board. In the circuit board solder paste printing production line, generally, the printing production line comprises a board feeding device, a printing device, a detection device and a mounting device for mounting components. The board feeding device is used for conveying the circuit board to the printing device, the printing device is used for applying solder paste to the corresponding position of the circuit board, the detection device is used for detecting the quality of the applied solder paste, and the mounting device is used for mounting components on the circuit board after the detection device completes the detection operation, and the mounting device is used for conveying the circuit board to other workstations after completing the mounting operation.

[0003] The existing circuit board printing production line generally does not have the function of automatically storing unqualified circuit boards. When the detection device detects an unqualified circuit board, the circuit board can only be taken out after the production line is stopped, which leads to low efficiency of the production line.

[0004] In summary, how to provide a circuit board printing technology capable of automatically storing unqualified circuit boards is a problem to be solved in the technical field of circuit board surface assembly production line. SUMMARY

[0005] The present application provides a circuit board printing production line, which can solve the technical problem that unqualified circuit boards cannot be automatically stored during the solder paste printing process.

[0006] To solve the above technical problems, the present application adopts the following technical solutions: A circuit board printing production line includes at least a solder printing device, a solder detection device, and a storage docking station. The solder printing device is configured to receive a circuit board provided by the solder printing device and detect the solder quality of the circuit board. The storage docking station includes a conveying mechanism, a storage mechanism, a first sensor, and a control unit. The conveying mechanism is configured to receive and convey the circuit board provided by the solder detection device. The conveying mechanism includes a conveying drive assembly and two conveying structure groups. The two conveying structure groups are symmetrically arranged. Each drive structure group includes a first conveying structure, a second conveying structure, and a third conveying structure arranged in sequence along the conveying direction of the conveying mechanism. The first conveying structure, the second conveying structure, and the third conveying structure are configured to support the circuit board. The conveying drive assembly is configured to drive the first conveying structure, the second conveying structure, and the third conveying structure to convey the circuit board in the forward direction and in the reverse direction along the conveying direction. The storage mechanism includes a storage rack and a lifting drive motor. The storage rack is movably arranged 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. The output end of the lifting drive motor is connected to the storage rack through a linkage assembly to drive the storage rack to move up and down relative to the conveying mechanism. The first sensor is configured to sense the circuit board conveyed to the third conveying structure and generate a corresponding first sensing signal. The control unit is electrically connected to the solder detection device, the first sensor, the conveying drive assembly, and the lifting drive motor through wires. After receiving the defect signal fed back by the solder detection device and the first sensing signal fed back by the first sensor, the control unit controls the conveying drive member to drive the second conveying structure and the third conveying structure to convey the circuit board in the reverse direction. 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 move up so that the circuit board returned to the second conveying structure is lifted up from the second conveying structure by the support structure.

[0007] In an optional embodiment, the first sensor is located between the two conveying structure groups and below the board inlet end of the third conveying structure.

[0008] In an optional embodiment, the storage docking station further includes a second sensor. The second sensor is 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 member 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, the control unit controls the lifting drive motor to drive the storage rack to move up so that the circuit board returned to the second conveying structure is lifted up from the second conveying structure by the support structure.

[0009] In an optional embodiment, the second sensor is located between the two groups of conveying structures and below the ejection end of the first conveying structure.

[0010] In an optional 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.

[0011] In an optional embodiment, the storage docking station further comprises a scanning device for scanning the label of the circuit board, the scanning device being located below the first conveying structure and between the two groups of conveying structures; the scanning device is electrically connected to the control unit by wires; when the control unit receives a defect signal fed back by the soldering inspection device, the control unit controls the scanning device to scan the label of the circuit board on the first conveying structure.

[0012] In an optional embodiment, the group of conveying structures further comprises a support plate, the support plate comprising an inner side wall, the inner side walls of the support plates of the two groups of conveying structures being opposite to each other; the storage rack comprises two vertical plates, the two vertical plates being respectively slidably connected to the inner side walls of the support plates of the two groups of conveying structures; the vertical plate comprises a rack structure extending in the up-down direction; The linkage assembly comprises a first linkage shaft, a worm, a worm wheel, and two linkage gears; the two ends of the first linkage shaft are rotatably connected to the two support plates, the two second linkage gears are respectively sleeved on the two ends of the first linkage shaft and are engaged with the rack structures of the two support plates; the lifting drive motor is fixedly connected to one of the two support plates, the worm is sleeved on the output shaft of the lifting drive motor, the worm wheel is sleeved on the first linkage shaft, and the worm wheel and the worm are engaged.

[0013] In an optional embodiment, the second conveying structure comprises a plurality of conveying wheels arranged on the inner side wall of the support plate, the plurality of conveying wheels being sequentially and spacedly arranged in the conveying direction of the conveying mechanism; The support structure comprises a plurality of support blocks protruding from the two vertical plates; the plurality of support blocks are located on the side of the vertical plate away from the support plate and are arranged in an array, the support blocks in each row are sequentially and spacedly arranged in the conveying direction, and the support blocks in each column are sequentially and spacedly arranged in the up-down direction; the vertical plate is provided with a plurality of waist-shaped holes; one waist-shaped hole is arranged between two adjacent columns of support blocks; the waist-shaped hole extends from above the uppermost support block to below the lowermost support block; each conveying wheel is sequentially and correspondingly located in each waist-shaped hole.

[0014] In an optional embodiment, the conveying drive assembly comprises a conveying drive motor, a second linkage shaft, a first belt pulley set, and two second belt pulley sets; the two ends of the second linkage shaft are rotatably connected to the two support plates, the two ends of the second linkage shaft are respectively connected to the plurality of conveying wheels on the two support plates through a second belt pulley set to achieve transmission connection; the output shaft of the conveying drive motor is connected to the second linkage shaft through a first belt pulley set to achieve transmission connection; The first belt wheel set comprises a first connecting wheel, a second connecting wheel and a first connecting belt; the first connecting wheel is sleeved on the output shaft of the conveying driving motor, the second connecting wheel is sleeved on the second connecting shaft; the first connecting belt is sleeved on the first connecting wheel and the second connecting wheel; the second belt wheel set comprises a first driving belt wheel, a plurality of first driven belt wheels, a first connecting belt and a second connecting belt; the first driving belt wheel is sleeved on the second connecting shaft, and each first driven belt wheel is correspondingly sleeved on the rotating shaft of each conveying wheel; the first connecting belt is sleeved on each first driven belt wheel and the first driving belt wheel.

[0015] In an optional embodiment, the first conveying structure comprises two first tensioning wheels and a first transmission belt; the two first tensioning wheels are arranged on the inner side wall of the support plate; the first transmission belt is sleeved on the two first tensioning wheels; a third connecting wheel is sleeved on the rotating shaft of one of the two first tensioning wheels, and a second connecting belt is sleeved on the third connecting wheel. The third conveying structure comprises two second tensioning wheels and a second transmission belt; the two second tensioning wheels are arranged on the inner side wall of the support plate, and the second transmission belt is sleeved on the two second tensioning wheels; a fourth connecting wheel is sleeved on the rotating shaft of one of the two second tensioning wheels, and a second connecting belt is sleeved on the fourth connecting wheel.

[0016] Compared with the prior art, the present application has the following advantages: The present application adopts a solder printing device to print circuit boards, a solder detection device is used to detect the printing quality of the solder printing device, and the circuit boards are conveyed by the first conveying structure, the second conveying structure and the third conveying structure when the solder detection device is conveyed to the conveying mechanism of the storage docking table. When the solder detection device detects unqualified circuit boards, a defect signal is sent to the control unit of the storage docking table, and when the unqualified circuit boards are conveyed to the third conveying structure, the first sensor senses the circuit boards on the third conveying structure and generates a first sensing signal. After receiving the first sensing signal fed back by the first sensor, the control unit controls the conveying driving member to drive the second conveying structure and the third conveying structure to convey the circuit boards in reverse, and when the first sensor cannot sense the circuit boards and stop feeding back the first sensing signal to the control unit, it indicates that the circuit boards have left the third conveying structure and are sent back to the second conveying structure. Subsequently, the control unit controls the lifting driving motor to drive the storage rack to ascend, the circuit boards of the second conveying structure are lifted away from the second conveying structure by the supporting structure, and are stored. By using the above technical scheme, the present application can automatically identify and store unqualified circuit boards, and during the process of storing the unqualified circuit boards, the unqualified circuit boards are accurately conveyed to the second conveying structure, so as to be lifted away from the second conveying structure by the storage rack, thereby reducing the risk of failure of the storage rack in storing the circuit boards. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the plate storage docking station according to an embodiment of the present application; Figure 2 is a schematic diagram of the overall structure of the plate storage docking station according to an embodiment of the present application; Figure 1 is an exploded view of the structure of the plate storage docking station according to an embodiment of the present application; Figure 3 is a schematic diagram of the combined structure of the conveying mechanism and the rack station according to an embodiment of the present application; Figure 4 is a schematic diagram of the combined structure of the conveying mechanism and the rack station according to an embodiment of the present application; Figure 5 is a schematic diagram of the plate conveying process according to an embodiment of the present application; Figure 6 is a schematic diagram of the structure of the conveying mechanism according to an embodiment of the present application; Figure 7 is a schematic diagram of the structure of the conveying mechanism according to an embodiment of the present application; Figure 8 is a schematic diagram of the structure of the conveying mechanism group according to an embodiment of the present application; Figure 9 is a schematic diagram of the structure of the A part according to an embodiment of the present application; Figure 8 The figure is marked: 10, plate storage docking station; 11, control unit; 20, conveying mechanism group; 21, first conveying mechanism; 211, first tensioning wheel; 212, first mounting seat; 213, first transmission belt; 22, second conveying mechanism; 221, conveying wheel; 23, third conveying mechanism; 231, second tensioning wheel; 232, second transmission belt; 233, second mounting seat; 30, rack station; 31, mounting plate; 32, guide rod; 40, vertical plate; 41, rack structure; 42, support block; 421, vertical wall; 422, transverse wall; 43, waist-shaped hole; 51, lifting drive motor; 52, worm; 53, worm gear; 54, connecting gear; 55, first connecting shaft; 61, conveying drive motor; 62, first connecting belt; 63, second connecting belt; 64, second connecting shaft; 65, first driven pulley; 70, support plate; 81, fourth connecting wheel; 82, third connecting wheel; 90, scanning device; 101, first inductor; 102, second inductor DETAILED DESCRIPTION

[0018] ​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.

[0019] In the description of the present application, it should be understood that, if the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0020] In the description of the present application, it should be understood that, if the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can include one or more of the features explicitly or implicitly. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0021] In the description of the present application, it should be noted that, unless otherwise specified and limited, if the terms "mounting", "connecting", "connection" are used, they should be understood in a broad sense, for example, they can be fixedly connected, or detachably connected, or integrally connected; they can be mechanically connected, or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] The present embodiment provides a circuit board printing line for printing a circuit board. The circuit board printing line at least comprises a solder printing device (not shown in the figure), a solder detection device (not shown in the figure) and a board storage docking table 10 (as shown in Figure 1 and Figure 2 The solder printing device and the solder detection device can both use the devices commonly used in the industry. In order to facilitate the person skilled in the art to better understand the technical solutions of the present application, only the structure and working principle of the solder printing device and the solder detection device will be briefly described as follows: Please refer to Figure 5, first, the industry solder printing equipment generally includes conveying module and printing module, conveying module can be power conveyor belt D1, it will be printed circuit board to the printing module below, by printing module to print circuit board, after printing circuit, power conveyor belt D1 will continue to forward circuit board conveying. Solder detection equipment includes conveying module and detection module, the conveying module of solder detection equipment can also be power conveyor belt D2, the power conveyor belt D2 of solder detection equipment and the power conveyor belt of solder printing equipment are spliced, the power conveyor belt D1 of solder detection equipment pushes circuit board to the power conveyor belt D2 of solder detection equipment, by the power conveyor belt D2 of solder detection equipment, circuit board is conveyed to the detection module below, by detection module to detect the solder quality of circuit board, detection content includes but is not limited to: solder thickness, solder position, lack of tin, etc. After detection, if the solder quality is qualified, the control module of solder detection equipment generates qualified signal, if the solder quality is unqualified, the control module of solder detection equipment generates defect signal. After detection, the power conveyor belt D2 of solder detection equipment will be printed circuit board to the plate storage connection platform 10, the plate storage connection platform 10 is used to convey qualified circuit board to other equipment, or to a collection container, so as to be collected uniformly by the container. The plate storage connection platform 10 can also store unqualified circuit board, avoid unqualified circuit board to be conveyed to other processing equipment on the production line.

[0023] In some embodiments, the circuit board printing production line can also increase the plate feeding device and other processing equipment according to actual needs, the plate feeding device is used to feed the solder printing equipment, and the other processing equipment is connected with the plate storage connection platform 10 to receive the circuit board conveyed by the plate storage connection platform 10 and process the circuit board.

[0024] Please refer to Figures 1 to 4 In some embodiments, the plate storage connection platform 10 includes conveying mechanism, storage mechanism, first sensor 101 and control unit 11.

[0025] The conveying mechanism comprises a conveying driving assembly and two conveying structure groups 20, the two conveying structure groups 20 are symmetrically arranged, and each driving structure group comprises a first conveying structure 21, a second conveying structure 22 and a third conveying structure 23 arranged in sequence along a 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 or aligned at intervals with an outboard end of a power conveying belt of the solder detection equipment, and the power conveying belt of the solder detection equipment pushes the circuit board to the first conveying structure 21. Under the driving action of the conveying driving assembly, the first conveying structure 21 pushes the circuit board to the second conveying structure 22, the second conveying structure 22 pushes the circuit board to the third conveying structure 23, so as to realize forward conveying of the circuit board along the conveying direction F. In some scenarios, the conveying driving device can also drive the first conveying structure 21, the second conveying structure 22 and the third conveying structure 23 to convey the circuit board reversely.

[0026] The storage mechanism comprises a storage rack and a lifting driving motor 51. The storage rack is movably arranged on the conveying mechanism, and the storage rack is provided with a supporting structure. The output end of the lifting driving motor 51 is connected with the storage rack through a linkage assembly, and the lifting driving motor 51 is used to drive the storage rack to move up and down relative to the conveying mechanism. When the storage rack moves up, the supporting structure can push the circuit board up and away from the second conveying structure 22, and store the circuit board.

[0027] The first sensor 101 is configured to sense the circuit board conveyed to the third conveying structure 23 and generate a corresponding first sensing signal.

[0028] The control unit 11 can be a PLC controller, an MCU controller or other microcontroller capable of realizing the control of the equipment. The control unit 11 is electrically connected with the control module of the solder detection equipment, the first sensor 101, the lifting driving motor 51 and the conveying driving assembly through wires, and is electrically connected with the conveying mechanism, the lifting driving motor 51 and the first sensor 101. It is used to receive the signal fed back by the first sensor 101 and control the work of the lifting driving motor 51 and the conveying mechanism.

[0029] In addition to the components listed above, the plate storage connection table 10 can also include other common components, such as an electric control system, an alarm device, etc., which are not listed here.

[0030] Next, the working process of the technical scheme of the embodiment will be described in combination with the application scenario: Application scenario one: In this scenario, there is no need to store the plate, and the working process includes: Please combine the body Figure 5, the power transmission belt D2 of the soldering inspection equipment will transport the qualified circuit board to the first conveying structure 21, the first conveying structure 21 will transport the circuit board to the second conveying structure 22, the second conveying structure 22 will then transport the circuit board to the third conveying structure 23, and a board ejection sensor (not labeled in the figure) can be arranged at the board ejection end of the third conveying structure 23, when the circuit board is transported to the board ejection end of the third conveying structure 23, the board ejection sensor senses the circuit board, generates a corresponding sensing signal, and feeds back the sensing signal to the control unit 11, after the control unit 11 receives the sensing signal, the control unit 11 controls the conveying drive assembly to stop driving the first conveying structure 21, the second conveying structure 22 and the third conveying structure 23, so that the circuit board stays on the third conveying structure 23, and waits for the next station equipment to send a board ejection signal to the control unit 11, and then the third conveying structure 23 transports the circuit board to the next station equipment. In this application scenario, the board storage docking table 10 only transports the circuit board, and does not need to store the circuit board.

[0031] Application scenario two: please continue to combine Figure 5 In this scenario, the circuit board needs to be stored, and since there is inertia during the movement of the circuit board, unqualified circuit boards often cannot accurately stay on the second conveying structure 22, and move a certain distance under the action of inertia, so that part of the circuit board moves out of the second conveying structure 22, and the third conveying structure 23 can support the part of the circuit board that moves out of the second conveying structure 22, avoiding the circuit board from falling due to imbalance. At this time, since the circuit board does not completely stay on the second conveying structure 22, if the support structure of the storage rack directly lifts the circuit board, there is a risk that the circuit board will fall due to imbalance. In order to make the circuit board completely stay on the second conveying structure 22, the embodiment adopts the following working process: When the soldering inspection device detects a defective circuit board, a defect signal is generated and fed to the control unit 11 of the storage docking station 10. At the same time, the power conveyor belt D2 of the soldering inspection device conveys the defective circuit board to the first conveying structure 21, and the control unit 11 controls the conveying driving assembly to drive the first conveying structure 21, the second conveying structure 22 and the third conveying structure 23 to forwardly convey the defective circuit board until the defective circuit board reaches (or partially reaches, for example, the front end of the circuit board reaches) the third conveying structure 23, the first sensor 101 senses the circuit board to generate a first sensing signal, and feeds the first sensing signal to the control unit 11. After receiving the defect signal and the first sensing signal, the control unit 11 controls the conveying driving assembly to drive the first conveying structure 21, the second conveying structure 22 and the third conveying structure 23 to reversely convey the circuit board until the first sensor 101 stops feeding the first sensing signal to the control unit 11, indicating that the circuit board has completely separated from the third conveying structure 23 and is conveyed back to the second conveying structure 22. The control unit 11 controls the lifting driving motor 51 to drive the storage rack to move upward, and the support structure of the storage rack lifts the circuit board away from the second conveying structure 22, so as to store the circuit board above the second conveying structure 22. In this application scenario, the circuit board printing production line of the embodiment can identify the defective circuit board and automatically store the defective circuit board without stopping the machine. In addition, during the storage of the defective circuit board, the defective circuit board is first accurately limited on the second conveying structure 22, so as to accurately lift the defective circuit board upward by the storage rack, lift the circuit board away from the second conveying structure 22, and reduce the risk of failure of the storage rack in lifting the circuit board.

[0032] Please continue to refer to Figures 3 to 5 In some embodiments, in order to prevent the partial or entire defective circuit board from being conveyed back to the first conveying structure 21 during the reverse conveying of the defective circuit board, a second sensor 102 is further provided. 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 of the circuit board, when the control unit 11 receives the second sensing signal fed by the second sensor 102, the control unit 11 controls the conveying driving member to drive the first conveying structure 21, the second conveying structure 22 and the third conveying structure 23 to forwardly convey the circuit board until the first sensor 101 and the second sensor 102 stop feeding the first sensing signal and the second sensing signal to the control unit 11, indicating that the defective circuit board is completely located on the second conveying structure 22 and is completely supported by the second conveying structure 22, so as to reduce the risk of imbalance and falling of the circuit board during the subsequent lifting of the circuit board by the storage rack.

[0033] In some embodiments, the installation position and installation manner of the first sensor 101 and the second sensor 102 can adopt the following scheme: The first sensor 101 is located between the two conveying structure groups 20 and below the board-in end of the third conveying structure 23. The board-in end of the third conveying structure 23 can be understood as the end of the third conveying structure 23 close to the second conveying structure 22, and the end of the third conveying structure 23 away from the second conveying structure 22 is the board-out end of the third conveying structure 23. Specifically, the first sensor 101 is connected to the conveying structure group 20 through a connecting rod and is suspended below the board-in end of the third conveying structure 23. The first sensor 101 senses the circuit board in a non-contact manner, which can avoid interference with the conveying process of the circuit board.

[0034] The second sensor 102 is located between the two conveying structure groups 20 and below the board-out end of the first conveying structure 21. The board-out end of the first conveying structure 21 can be understood as the end of the first conveying structure 21 close to the second conveying structure 22, and the end of the first conveying structure 21 away from the second conveying structure 22 is the board-in end of the first conveying structure 21. Specifically, the second sensor 102 is connected to the conveying structure group 20 through a connecting rod and is suspended below the board-out end of the first conveying structure 21. The second sensor 102 senses the circuit board in a non-contact manner, which can avoid interference with the conveying process of the circuit board.

[0035] The second sensor 102 and the first sensor 101 are aligned in the conveying direction F of the conveying mechanism. This can not only make the structure layout neat, but also ensure that the first sensor 101 and the second sensor 102 can sense the same position of the circuit board, improve the consistency of the sensing signals of the two, and avoid differences in sensing results, such as one can sense the circuit board while the other cannot, or one senses the circuit board in advance while the other senses it with delay.

[0036] In some embodiments, the first sensor 101 and the second sensor 102 are both photoelectric sensors, preferably back-light suppression photoelectric sensors, which can avoid interference from the color of the circuit board and improve the accuracy of the sensing results.

[0037] In some embodiments, the board storage docking station 10 also includes a rack 30 and a shell, and a window is provided on each of the opposite sides of the shell. The board inlet end portion of the first conveying structure 21 is exposed to the window on one side of the shell so as to be spliced ​​with the power conveyor belt D2 of the solder detection equipment. The board outlet end portion of the third conveying structure 23 is exposed to the window on the other side of the shell so as to be docked with other equipment, such as the conveyor belt of the placement machine. The rack 30 is arranged in the shell, and the rack 30 includes two symmetrical and spaced mounting plates 31. The two mounting plates 31 are fixed to the inner wall of the shell by fasteners. Two guide rods 32 are arranged between the two mounting plates 31, and the two guide rods 32 are arranged side by side along the conveying direction F, and the two ends of the guide rods 32 are connected to the two mounting plates 31.

[0038] Please combine Figures 6 to 8 The conveying structure assembly 20 further includes a support plate 70, which is connected to the guide rod 32. Specifically, the guide rod 32 extends through the support plate 70, and the support plate 70 is suspended between the two mounting plates 31 by 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 face 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 spaced apart along the conveying direction F of the conveying mechanism. Specifically, a rubber ring is sleeved on the circumferential side wall of the conveying wheel 221. The material of the rubber ring can be a soft material such as rubber, silicone, etc. The rubber ring is partially embedded in the circumferential side wall of the conveying wheel 221, and the other part is exposed on the circumferential side wall of the conveying wheel 221. The rubber ring can abut against the circuit board. When the conveying wheel 221 drives the rubber ring to rotate, the friction between the rubber ring and the circuit board is used to convey the circuit board forward. To a certain extent, the relative sliding between the circuit board and the conveying wheel 221 can be reduced, which affects the accuracy of the conveying of the circuit board by the conveying wheel 221.

[0039] In some embodiments, the conveying drive assembly can drive the second conveying structure 22 in the following manner: The conveying driving assembly comprises a conveying driving motor 61, a second connecting shaft 64, two second bearings, a first belt wheel set and two second belt wheel sets. Two ends of the second connecting shaft 64 are rotatably connected to the two mounting plates 31 respectively, and the second connecting shaft 64 is rotatably connected to the two supporting plates 70 through the two second bearings respectively. The radial section of the second connecting shaft 64 is polygonal, and the assembly hole of the second bearing is matched with the shape of the second connecting shaft 64. By using such technical means, the second connecting shaft 64 can rotate relative to the supporting plate 70, and the supporting plate 70 can move relative to the first connecting shaft 55. The output shaft of the conveying driving motor 61 is transmissionally connected with the second connecting shaft 64 through the first belt wheel set, and the two ends of the second connecting shaft 64 are transmissionally connected with the plurality of conveying wheels 221 on the two supporting plates 70 through the two second belt wheel sets respectively. When the conveying driving motor 61 drives the second connecting shaft 64 to rotate, the second connecting shaft can drive the plurality of conveying wheels 221 on the two supporting plates 70 to rotate synchronously through the second belt wheel set.

[0040] Specifically, the first belt wheel set comprises a first connecting wheel, a second connecting wheel and a first connecting belt 62. The first connecting wheel is sleeved on the output shaft of the conveying driving motor 61, and the second connecting wheel is sleeved on the second connecting shaft 64. The first connecting belt 62 is sleeved on the first connecting wheel and the second connecting wheel.

[0041] The second belt wheel set comprises a first driving belt wheel, a plurality of first driven belt wheels 65, a first connecting belt 62 and a second connecting belt 63. The first driving belt wheel is sleeved on the second connecting shaft 64, and each first driven belt wheel 65 is sleeved on the rotating shaft of each conveying wheel 221 one by one. The first connecting belt 62 is sleeved on each first driven belt wheel 65 and the first driving belt wheel. When the conveying driving motor 61 rotates, the second connecting shaft 64 can be driven to rotate, and the second connecting shaft 64 drives the conveying wheels 221 on the two supporting plates 70 to rotate synchronously.

[0042] In some embodiments, the first conveying structure 21 is a transmission belt driven by the conveying driving assembly and performs the action of conveying the circuit board synchronously with the second conveying structure 22. The first conveying structure 21 comprises a first mounting base 212, two first tensioning wheels 211 and a first transmission belt 213. The two first tensioning wheels 211 are arranged on the inner side of the supporting plate 70 through the first mounting base 212. Specifically, the first mounting base 212 is arranged in extension along the conveying direction F, one end of the first mounting base 212 is fixedly connected to the supporting plate 70, and the other end of the first mounting base 212 is arranged in suspension. The two first tensioning wheels 211 are arranged on the inner side of the first mounting base 212. The first transmission belt 213 is sleeved on the two first tensioning wheels 211 to support and convey the circuit board. The rotation shaft of one of the two first tensioning wheels 211 is sleeved with the third connecting wheel 82, and the second connecting belt 63 is sleeved on the third connecting wheel 82, so that the third connecting wheel 82 rotates synchronously with the conveying wheel 221. The third connecting wheel 82 drives the corresponding first tensioning wheel 211 to rotate, and the first tensioning wheel 211 drives the first transmission belt 213 to move, so that the first transmission belt 213 can convey the circuit board. Of course, in other embodiments, the first conveying structure 21 can also be a transmission belt with power commonly seen on the market.

[0043] The third conveying structure 23 is also a transmission belt driven by the conveying driving assembly and performs the action of conveying the circuit board synchronously with the second conveying structure 22. The third conveying structure 23 comprises a second mounting base 233, two second tensioning wheels 231 and a second transmission belt 232. The two second tensioning wheels 231 are arranged on the inner side of the supporting plate 70 through the second mounting base 233. Specifically, the second mounting base 233 is arranged in extension along the conveying direction F, one end of the second mounting base 233 is fixedly connected to the side of the supporting plate 70 away from the first mounting base 212, and the other end of the second mounting base 233 is arranged in suspension. The two second tensioning wheels 231 are arranged on the inner side of the second mounting base 233, and the second transmission belt 232 is sleeved on the two second tensioning wheels 231. The rotation shaft of one of the two second tensioning wheels 231 is sleeved with the fourth connecting wheel 81, and the second connecting belt 63 is sleeved on the fourth connecting wheel 81, so that the fourth connecting wheel 81 rotates synchronously with the conveying wheel 221. The fourth connecting wheel 81 drives the corresponding second tensioning wheel 231 to rotate, and the second tensioning wheel 231 drives the second transmission belt 232 to move, so that the second transmission belt 232 can convey the circuit board. Of course, in other embodiments, the third conveying structure 23 can also be a transmission belt with power commonly seen on the market.

[0044] In some embodiments, the board storage mechanism stores the unqualified circuit board through the following technical means: The storage rack comprises two vertical plates 40, which are respectively slidably connected to the inner side walls of the support plates 70 of the two conveying structure groups 20. Specifically, the side of the vertical plate 40 facing the support plate 70 is provided with at least two sliding blocks, which are fixed to the vertical plate 40 by fasteners and arranged side by side along the conveying direction F. The side of the support plate 70 facing the vertical plate 40 is provided with at least two sliding rails, which are connected to the support plate 70 by fasteners, and the sliding rails are provided with sliding grooves, and the two sliding blocks are respectively clamped in the sliding grooves of the two sliding rails to be slidably connected with the sliding grooves.

[0045] The vertical plate 40 comprises a rack structure 41 extending in the up-down direction, which is arranged at one side of the vertical plate 40. The rack structure 41 can be integrally formed with the vertical plate 40, or can be an independent component fixed to the vertical plate 40 by fasteners. In other embodiments, the mounting position of the rack structure 41 on the vertical plate 40 can also be changed according to actual design requirements, for example, the rack structure 41 is arranged at the middle position of the vertical plate 40.

[0046] The linkage assembly comprises a first linkage shaft 55, a worm 52, a worm gear 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 second linkage gears 54 are respectively sleeved on the two ends of the first linkage shaft 55 and engaged with the rack structures 41 of the two support plates 70. The lifting drive motor 51 is fixed to the rack 30, the worm 52 is sleeved on the output shaft of the lifting drive motor 51, the worm gear 53 is sleeved on the first linkage shaft 55, and the worm gear 53 and the worm 52 are engaged. The rotating shaft of the lifting drive motor 51 drives the worm 52 to rotate, the worm 52 drives the worm gear 53 to rotate, the worm gear 53 drives the two second linkage gears 54 to rotate through the first linkage shaft 55, and the two second linkage gears 54 respectively drive the rack structures of the two vertical plates 40 to move up and down, so that the corresponding vertical plate 40 is driven to move up and down by the rack structure. In the foregoing scheme, the lifting drive motor 51 can more accurately and stably drive the first linkage shaft 55 to rotate relative to the support plate 70 through the worm gear 53-worm 52 transmission, and the vertical plate 40 can be more stably and accurately moved up and down through the second linkage gear 54 and the rack structure transmission.

[0047] 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. The support blocks 42 in each row are arranged in sequence along the conveying direction F, and the support blocks 42 in each column are arranged in sequence along the up and down 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 holes 43 extend downward from the top of the support block 42 to the bottom of the support block 42. Each conveying wheel 221 is located in each waist-shaped hole 43 one by one. When the vertical plate 40 moves up and down, each waist-shaped hole 43 can avoid each conveying wheel 221, and each conveying wheel 221 can send relative movement compared to each waist-shaped hole 43. Such a structure makes the cooperation between the vertical plate 40 and the second conveying structure 22 more compact.

[0048] Further, please combine Figure 9 The support block 42 has an L-shaped bearing portion on the side facing away from the vertical plate 40. The bearing portion includes a vertical wall 421 and a horizontal wall 422 extending from the bottom side of the vertical wall 421 in the direction facing away from the vertical plate 40. The horizontal wall 422 lifts up and bears the unqualified circuit boards.

[0049] The principle of the support structure lifting circuit boards and storing unqualified circuit boards is as follows: when the vertical plates 40 move upward, the support blocks 42 in the top row lift the circuit boards upward, causing them to be lifted off the conveying wheel 221 and temporarily stored on the support blocks 42 in the top row. When another unqualified circuit board is conveyed to the conveying wheel 221, the vertical plates 40 continue to move upward by a preset distance, causing the support blocks 42 in the next row to lift the circuit board upward, which is then lifted off the conveying wheel 221 and stored on the support blocks 42 in that row. Similarly, when all rows of support blocks 42 store circuit boards, the cabinet door on the housing can be manually opened, the circuit boards on the storage rack can be manually removed, and then the reset button can be manually pressed to cause the two vertical plates 40 of the storage rack to move downward to the initial state.

[0050] Please continue reading Figures 3 to 5In some embodiments, the storage docking station 10 further comprises 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 support. The support can be an angularly adjustable member formed by a plurality of connecting rods, or an angularly non-adjustable member formed by a connecting rod. The scanning device 90 is electrically connected to the control unit 11 by wires. The scanning device 90 is used to scan the label on the unqualified circuit board, obtain the marking information contained in the label, and transmit the marking information to the control unit 11. The control unit 11 stores the marking information in a storage module, such as a database or a separately arranged storage medium, for subsequent use. The scanning device 90 can use a scanning member commonly used in the industry, and the specific structure and working principle of the scanning body are not described here.

[0051] The working process of the scanning device 90 includes: when the control unit 11 receives the defect signal fed back by the solder detection device, 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 collects and counts the number of unqualified circuit boards and the corresponding defect categories. According to the information of the unqualified circuit board collected by the control unit 11, the operator can judge the yield of the circuit board printing and the defects existing in the soldering process, and then make targeted improvements.

[0052] In the specific content of the above specific embodiments, any technically consistent combination of technical features can be combined. In order to make the description simple, not all possible combinations of the above technical features are described, but as long as the combination of these technical features does not exist, it should be considered as the scope of the description.

[0053] The specific content of the above specific embodiments only expresses several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A circuit board printing production line, comprising at least a solder printing device, a solder detection device and a board storage docking station (10), wherein the solder printing device is used to receive a circuit board provided by the solder printing device and detect the solder quality of the circuit board, characterized in that: The board storage docking station (10) comprises: A conveying mechanism for receiving and conveying a circuit board provided by the solder detection device, the conveying mechanism comprising a conveying drive assembly and two conveying structure groups (20), the two conveying structure groups (20) being symmetrically arranged, each of the drive structure groups comprising a first conveying structure (21), a second conveying structure (22) and a third conveying structure (23) being sequentially arranged along a 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 a forward direction and a reverse direction along the conveying direction; A board storage mechanism, comprising a storage rack and a lifting drive motor (51), wherein the storage rack is arranged on the conveying mechanism so as to be movable up and down, and the storage rack is provided with a supporting structure, the position of the supporting structure corresponding 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 assembly to drive the storage rack to move up and down relative to the conveying mechanism; A first sensor (101) configured to sense the circuit board conveyed to the third conveying structure (23) and generate a corresponding first sensing signal; A control unit (11) is electrically connected to the solder detection device, the first sensor (101), the conveying drive component and the lifting drive motor (51) through wires. After receiving the defect signal fed back by the solder detection device and the first sensing signal fed back by the first sensor (101), the control unit (11) can control the conveying drive component to drive the second conveying structure (22) and the third conveying structure (23) to reversely 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 circuit board returned to the second conveying structure (22) is lifted up and away from the second conveying structure (22) by the support structure.

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

3. The circuit board printing production line according to claim 2, wherein: The board storage docking station (10) further 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 to drive the first conveying structure (21), the second conveying structure (22) and the third conveying structure (23) to forwardly convey the circuit board 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), the control unit (11) controls the lifting drive motor (51) to drive the storage rack to rise, so that the circuit board returned to the second conveying structure (22) is lifted up and away from the second conveying structure (22) by the support structure.

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

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

6. The circuit board printing production line according to any one of claims 1 to 5, wherein: The board storage docking station (10) further includes a scanning device (90) for scanning the label of the circuit board. 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 fed back by the solder detection equipment, the control unit (11) controls the scanning device (90) to scan the label of the circuit board on the first conveying structure (21).

7. The circuit board printing production line according to claim 6, wherein: The conveying structure group (20) further includes a support plate (70), the support plate (70) including an inner side wall, and the inner side walls of the support plates (70) of the two conveying structure groups (20) are opposite to each other; the storage rack includes two vertical plates (40), and the two vertical plates (40) are respectively slidably connected to the inner side walls of the support plates (70) of the two conveying structure groups (20) in an upward and downward direction; the vertical plate (40) includes a rack structure (41) extending in the upward and downward directions; 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 second linkage gears (54) are respectively sleeved on the two ends of the first linkage shaft (55) and meshed with the rack structures (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) are meshed.

8. The circuit board printing production line according to claim 7, wherein: The second conveying structure (22) comprises a plurality of conveying wheels (221) arranged on the inner side wall of the support plate (70), and the plurality of conveying wheels (221) are arranged in sequence 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 plates (40) facing away from the support plate (70) and are arranged in an array, the support blocks (42) in each row are arranged in sequence along the conveying direction, and the support blocks (42) in each column are arranged in sequence along the up-down direction; the vertical plates (40) are provided with a plurality of waist-shaped holes (43); a waist-shaped hole (43) is provided between the support blocks (42) in two adjacent columns; the waist-shaped hole (43) extends downward from the top of the support block (42) to the bottom of the support block (42) at the bottom; and each of the conveying wheels (221) is located in each of the waist-shaped holes (43) in a corresponding manner.

9. The circuit board printing production line according to claim 8, wherein: The conveying drive assembly comprises a conveying drive motor (61), a second linkage shaft, a first pulley group, and two second pulley groups; the two ends of the second linkage shaft are rotatably connected to the two support plates (70), and the two ends of the second linkage shaft are respectively connected to the plurality of conveying wheels (221) on the two support plates (70) through the second pulley group; the output shaft of the conveying drive motor (61) is connected to the second linkage shaft through the first pulley group; The first belt pulley group includes a first interlocking pulley, a second interlocking pulley and a first interlocking belt (62); the first interlocking pulley is sleeved on the output shaft of the conveying drive motor (61), and the second interlocking pulley is sleeved on the second interlocking shaft; the first interlocking belt (62) is sleeved on the first interlocking pulley and the second interlocking pulley; the second belt pulley group includes a first driving pulley, a plurality of first driven pulleys (65), a first interlocking belt (62) and a second interlocking belt (63); the first driving pulley is sleeved on the second interlocking shaft, and each of the first driven pulleys (65) is sleeved on the rotating shaft of each of the conveying wheels (221) one by one; the first interlocking belt (62) is sleeved on each of the first driven pulleys (65) and the first driving pulley.

10. The circuit board printing production line according to claim 9, wherein: The first conveying structure (21) includes two first tensioning wheels (211) and a first transmission belt (213); the two first tensioning wheels (211) are arranged on the inner side wall of the support plate (70); the first transmission belt is sleeved on the two first tensioning wheels (211); a third linkage wheel (82) is sleeved on the rotating shaft of one of the two first tensioning wheels (211), and the second linkage belt (63) is sleeved on the third linkage wheel (82); The third conveying structure (23) includes two second tensioning wheels (231) and a second transmission belt (232), wherein the two second tensioning wheels (231) are arranged on the inner side wall of the support plate (70), and the second transmission belt is sleeved on the two second tensioning wheels (231); a fourth linkage wheel (81) is sleeved on the rotating shaft of one of the two second tensioning wheels (231), and the second linkage belt (63) is sleeved on the fourth linkage wheel (81).

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