PCB board hydrophobicity test system and test method

Abstract

The present application relates to the technical field of detection equipment, and in particular to a PCB board hydrophobicity test system and test method, including a machine body, a feeding track is provided in the machine body, and the feeding track is connected to a feeding track and a defective product track; a cleaning box includes a first box body and a second box body, the first box body is used for cleaning, and the second box body is used for cleaning and drying; a first cleaning module is used to send the PCB board into the first box body; a second cleaning module is used to send the PCB board into the second box body; a first transfer mechanism is used to move the PCB board from the feeding track to the first cleaning module; a test module is used to drive the PCB board to move and flip, and the second transfer mechanism is used to move the PCB board from the first cleaning module to the test module; a camera module is used to take pictures, and a drip module is used to move to the top of the test module and drip water. The present application can realize the full process automation of the hydrophobicity test of the PCB board, and includes standardized cleaning steps, thereby improving the accuracy and efficiency of the detection.

Description

Technical Field

[0001] The present application relates to the technical field of testing equipment, and in particular to a PCB board hydrophobicity testing system and testing method. Background Art

[0002] In the field of electronic manufacturing, PCB (Printed Circuit Board) is the core component of electronic equipment, and its quality is directly related to the performance and reliability of electronic products. The hydrophobicity of PCB is an important indicator for evaluating its waterproof and moisture-proof performance. Efficient hydrophobicity testing helps to ensure the stability of PCB in humid environments, prevent circuit short circuits and corrosion, and improve the overall quality and service life of products. Therefore, accurate and rapid hydrophobicity testing has become a key link in the electronic manufacturing process.

[0003] At present, the method of testing the hydrophobicity of PCB boards is mainly through manual testing one by one. The operator manually drops water on the surface of the PCB board, and then uses a camera to take pictures to observe the spread of the water droplets. Even when it comes to automation, the existing technology is limited to semi-automatic processes, such as automatic dripping or camera photography, and cannot achieve full automation of the entire process of PCB cleaning and testing.

[0004] However, the existing manual hydrophobicity test method cannot realize the full process automation test process, and it is difficult to meet the needs of modern production for fast, high-precision and standardized testing. In addition, it lacks standardized cleaning steps, which may lead to the presence of residues on the surface of the PCB board, affecting the accuracy of the test results. Therefore, a new PCB board hydrophobicity test system and test method are urgently needed to solve the problems existing in the prior art, realize the full process automation of PCB board hydrophobicity testing, and include standardized cleaning steps, so as to improve the accuracy and efficiency of detection. Summary of the invention

[0005] In order to realize the full process automation of PCB board hydrophobicity testing, including standardized cleaning steps, thereby improving the accuracy and efficiency of detection, the present application provides a PCB board hydrophobicity testing system and testing method. The present application provides the following technical solutions:

[0006] In a first aspect, the present application provides a PCB board hydrophobicity testing system, comprising:

[0007] A machine body, wherein a fixed platform is provided in the machine body, a loading track is provided on the fixed platform, and the loading track is respectively connected to a unloading track and a defective product track;

[0008] A cleaning box, the cleaning box comprising a first box body and a second box body, the first box body is used to clean the PCB board, and the second box body is used to clean and dry the PCB board;

[0009] A first cleaning module, the first cleaning module is located outside the first box, and the first cleaning module is used to send the PCB board into the first box;

[0010] A second cleaning module, the second cleaning module is located outside the second box, and the second cleaning module is used to send the PCB board into the second box; the first cleaning module and the second cleaning module are arranged in parallel;

[0011] A first transfer mechanism, the first transfer mechanism is located between the loading track and the first cleaning module, and the first transfer mechanism is used to move the PCB board from the loading track to the first cleaning module;

[0012] A test module is used to drive the PCB board to move and flip. A second transfer mechanism is provided between the test module and the first cleaning module, and the second transfer mechanism is used to move the PCB board from the first cleaning module to the test module; a dripping module and a camera module are also provided on one side of the test module. The camera module is located above the test module and is used to take pictures of the PCB board, and the dripping module is used to move above the test module and drip water on the PCB board.

[0013] In a specific feasible implementation scheme, the first cleaning module and the second cleaning module have the same structure, the second cleaning module includes a first slide cylinder and a mounting frame, the mounting frame is arranged on the slide of the first slide cylinder, a closed plate is provided on the side of the mounting frame close to the second box body, and a horizontally arranged tray is connected to the closed plate on the side close to the second box body; a through groove for the second cleaning module to enter is provided on the side of the second box body close to the second cleaning module, and the closed plate has the same size as the through groove.

[0014] In a specific feasible implementation scheme, a pipe joint is provided in each of the first box body and the second box body, and the pipe joint is connected to a first bamboo tube with a bent arrangement, and the end of the first bamboo tube away from the pipe joint is connected to a cleaning liquid nozzle, and the pipe joint is also connected to a cleaning liquid barrel through a pipe; the pipe joint in the second box body is also connected to a second bamboo tube with a bent arrangement, and the end of the second bamboo tube away from the pipe joint is connected to a gas nozzle; the bottoms of the first box body and the second box body are both connected to a waste liquid barrel through pipes, and the first box body and the second box body are commonly connected to a ventilation pipe, and the ventilation pipe is connected to a suction fan, and the suction fan is arranged on the top of the body.

[0015] In a specific feasible implementation scheme, a first cylinder is provided on a side of the first box body away from the first cleaning module, and a piston rod of the first cylinder passes through the first box body and is connected to a pipe joint in the first box body; a second cylinder is provided on a side of the second box body away from the second cleaning module, and a piston rod of the second cylinder passes through the second box body and is connected to a pipe joint in the second box body.

[0016] In a specific implementation manner, a plurality of second bamboo tubes are provided, and the plurality of second bamboo tubes are respectively located above and below the second cleaning module, and the gas nozzle is a fan-shaped nozzle.

[0017] In a specific feasible implementation scheme, the test module includes a second slide cylinder and a U-shaped frame, the second slide cylinder is arranged below the camera module, the U-shaped frame is arranged on the slide of the second slide cylinder, a rotating table is rotatably arranged on the U-shaped frame, a flipping motor is installed on the side wall of the U-shaped frame, the output end of the flipping motor passes through the U-shaped frame and is connected to the rotating table, the top surface of the rotating table is connected to a test plate, the middle part of the test plate is raised, and limit blocks are arranged at the four corners of the raised part, and the limit blocks are L-shaped; a circle of drainage grooves are provided on the surrounding side of the raised part of the test plate.

[0018] In a specific possible implementation scheme, the camera module includes a frame and a camera, the frame is located on one side of the drip module, the camera is obliquely installed on the top of the frame, the installation angle of the camera is the same as the angle at which the test module drives the PCB board to flip, and the end of the camera close to the test module is connected to a square light source.

[0019] In a specific possible implementation scheme, the dripping module includes an x-axis driving mechanism, a y-axis driving mechanism, a z-axis driving mechanism and a dropper, the x-axis driving mechanism is arranged on the y-axis driving mechanism, the z-axis driving mechanism is arranged on the x-axis driving mechanism, and the dropper is arranged on the z-axis driving mechanism; the dropper is also connected to a metering pump through a pipeline.

[0020] In a specific feasible implementation scheme, a photoelectric sensor is provided on the feeding track, a blocking cylinder is provided at the connection between the feeding track and the unloading track, and a barcode scanning gun is provided at the entrance of the feeding track.

[0021] In a second aspect, the present application provides a PCB board hydrophobicity testing method, which is applied to the PCB board hydrophobicity testing system as described in the first aspect, and the method comprises:

[0022] Clean the PCB with isopropyl alcohol;

[0023] Turn over the cleaned PCB board and take a photo with a camera;

[0024] Turn the PCB over and reset it, and drip water onto the PCB through a dropper;

[0025] Turn the PCB board over again after dripping water, and take a photo with the camera;

[0026] Turn the PCB over and reset it, clean it with isopropyl alcohol, and dry it.

[0027] In summary, the beneficial effects of this application include at least:

[0028] 1) By flipping the PCB board multiple times and taking pictures with a camera, combined with the uniform illumination provided by the square light source, the details of the PCB board surface can be accurately captured, improving the accuracy of the hydrophobicity test results. In addition, the amount of water dripping is accurately controlled by a metering pump to ensure that the volume of each drip is consistent, further improving the reliability of the test.

[0029] 2) The system is equipped with an isopropyl alcohol cleaning and drying module, which cleans and dries the PCB board through the first cleaning module and the second cleaning module. In particular, during the drying stage, the fan-shaped airflow nozzle is used to quickly dry the residual liquid on the surface of the PCB board, ensuring the dry state of the PCB board during testing and subsequent processes, and avoiding the impact of residual liquid on test results or product quality.

[0030] 3) Through the linkage setting of the isopropyl alcohol detector and the suction fan, the isopropyl alcohol concentration in the cleaning box is monitored in real time, and the ventilation and exhaust system is automatically started when the concentration increases, so as to quickly reduce the isopropyl alcohol concentration and prevent the risk of fire and explosion. At the same time, the use of capacitive proximity sensors to monitor the liquid level of the waste liquid barrel avoids direct contact between the sensor and the liquid, reduces the risk of corrosion and contamination of the sensor, and further improves the safety of the equipment.

[0031] Through the set sensors and cylinders, the whole process from PCB board loading to cleaning, drying, taking pictures, dripping, taking pictures again, and unloading is automated. This effectively solves the problems of low efficiency and precision in the traditional manual testing process, improves the reliability and efficiency of the test, and at the same time, through the setting of isopropyl alcohol detector and suction fan, the safety of the test process is ensured, and the accumulation and leakage of isopropyl alcohol gas is avoided. By introducing a fully automatic PCB board hydrophobicity test system and method, efficient, accurate and safe full-process automated operation of PCB board hydrophobicity testing is achieved, effectively solving technical problems such as low efficiency and safety hazards in traditional testing methods.

[0032] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The overall structure of the PCB hydrophobicity test system in this embodiment is shown in FIG. Figure 1 .

[0034] Figure 2 The overall structure of the PCB hydrophobicity test system in this embodiment is shown in FIG. Figure 2 .

[0035] Figure 3 1 is a top view of the PCB board hydrophobicity testing system in this embodiment.

[0036] Figure 4 Schematic diagram of the structure of the feeding track in this embodiment.

[0037] Figure 5 It is a schematic diagram of the structure of the cleaning box, the first cleaning module and the second cleaning module in this embodiment.

[0038] Figure 6 yes Figure 5 Enlarged view of part A.

[0039] Figure 7 It is a schematic diagram of the structure of the cleaning liquid barrel and the waste liquid barrel in this embodiment.

[0040] Figure 8 The structure diagram of the test module, the dripping module and the camera module in this embodiment is shown in FIG. Figure 1 .

[0041] Fig. 9 yes Figure 8 Enlarged view of part B.

[0042] Fig.10 The structure diagram of the test module, the dripping module and the camera module in this embodiment is shown in FIG. Figure 2 .

[0043] Fig.11 It is a schematic diagram of the structure of the test module in this embodiment.

[0044] Figure numerals: 1, machine body; 11, loading track; 12, unloading track; 13, defective product track; 14, fixed platform; 15, first transfer mechanism; 16, second transfer mechanism; 17, photoelectric sensor; 18, blocking cylinder; 19, barcode scanner; 2, cleaning box; 21, first box; 22, second box; 221, pipe joint; 222, first bamboo tube; 223, cleaning liquid nozzle; 224, second bamboo tube; 225, gas nozzle; 23, ventilation pipe; 24, first cylinder; 25, cleaning liquid barrel; 26, waste liquid barrel; 27, second cylinder; 3, first cleaning module; 4, second cleaning module; 41 , the first slide cylinder; 42, the mounting frame; 43, the closed plate; 44, the tray; 441, the groove; 5, the test module; 51, the second slide cylinder; 52, the U-shaped frame; 53, the flip motor; 54, the rotating table; 55, the test plate; 551, the drainage trough; 56, the limit block; 6, the drip module; 61, the x-axis drive mechanism; 62, the y-axis drive mechanism; 63, the z-axis drive mechanism; 64, the dropper; 65, the metering pump; 66, the fixed plate; 67, the top plate; 68, the bottom plate; 69, the make way slot; 7, the camera module; 71, the frame; 72, the camera; 73, the square light source; 8, the isopropyl alcohol detector; 9, the suction fan. DETAILED DESCRIPTION

[0045] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0046] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0047] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] The embodiment of the present application discloses a PCB board hydrophobicity testing system.

[0050] Reference Figure 1 The PCB board hydrophobicity testing system comprises a machine body 1, a fixing platform 14 is arranged inside the machine body 1, a feeding track 11 is fixedly mounted on the fixing platform 14, and a feeding track 12 and a defective product track 13 are connected to the end of the feeding track 11 away from the entrance. Figure 2 and Figure 3 , a cleaning box 2, a first cleaning module 3 and a second cleaning module 4 are also provided on the fixed platform 14 on one side of the feeding track 11, the first cleaning module 3 and the second cleaning module 4 are arranged in parallel, and a first transfer mechanism 15 is provided between the feeding track 11 and the first cleaning module 3. A test module 5, a camera module 7 and a drip module 6 are also provided on the fixed platform 14 on the side of the second cleaning module 4 away from the first cleaning module 3, and a second transfer mechanism 16 is provided between the second cleaning module 4 and the test module 5. It should be noted that the first transfer mechanism 15 and the second transfer mechanism 16 in the embodiment of the present application are both common common knowledge in the art, that is, clamps that can move in the horizontal direction and the vertical direction, so the present application will not describe the structure of the first transfer mechanism 15 and the second transfer mechanism 16 in detail. The first transfer mechanism 15 is used to realize the movement operation of the PCB board from the feeding track 11, the unloading track 12 or the defective track 13 to the first cleaning module 3 or the second cleaning module 4 through the first clamp. The second transfer mechanism 16 is used to realize the movement operation of the PCB board from the first cleaning module 3 or the second cleaning module 4 to the test module 5 through the second clamping claw.

[0051] Reference Figure 4 A barcode scanner 19 is provided at the entrance of the feeding track 11 for scanning and registering the PCB board being fed. The QR code on the PCB board is usually located on the bottom of the PCB board, so the barcode scanner 19 is provided at the bottom of the feeding track 11. A photoelectric sensor 17 is provided at one end of the feeding track 11 away from the entrance, and a blocking cylinder 18 is provided at the connection between the feeding track 11 and the unloading track 12. Figure 3The photoelectric sensor 17 and the blocking cylinder 18 are arranged to facilitate the realization that when the PCB board on the feeding track 11 passes through the photoelectric sensor 17, the photoelectric sensor 17 can send a signal to make the blocking cylinder 18 rise and stop the PCB board, and then move the PCB board to the first cleaning module 3 through the first clamp of the first transfer mechanism 15.

[0052] Reference Figure 2 and Figure 5 The cleaning box 2 includes a first box body 21 and a second box body 22. The first box body 21 and the second box body 22 are fixedly mounted on the fixing platform 14 and arranged side by side. The first box body 21 is used to clean the PCB board, and the second box body 22 is used to clean and dry the PCB board. The first cleaning module 3 is located outside the first box body 21, and the first cleaning module 3 is used to send the PCB board into the first box body 21. The second cleaning module 4 is located outside the second box body 22, and the second cleaning module 4 is used to send the PCB board into the second box body 22. The first box body 21 and the second box body 22 are both provided with pipe joints 221, combined with Figure 6 , the pipe joint 221 is connected to a plurality of first bamboo tubes 222 that are bent. It should be noted that since the attached drawings cannot show the bamboo tubes in a bent state, the attached drawings show the bamboo tubes in a straight state. In actual implementation, the bamboo tubes are all bent and arranged in the cleaning box 2. Each first bamboo tube 222 is connected to a cleaning liquid nozzle 223 at one end away from the pipe joint 221. Figure 7, the pipeline joint 221 is also connected to a cleaning liquid barrel 25 filled with isopropyl alcohol solution through a pipeline. Different from the inside of the first box body 21, the pipeline joint 221 in the second box body 22 is also connected to a plurality of second bamboo tubes 224 with a bent arrangement. Each second bamboo tube 224 is connected to a gas nozzle 225 at one end away from the pipeline joint 221. The gas nozzle 225 is a fan-shaped nozzle. Through the arrangement of the fan-shaped nozzle, after cleaning, there may still be residual liquid on the surface of the PCB board. The fan-shaped airflow ejected by the gas nozzle 225 can quickly dry the liquid on the surface of the PCB board, improve the drying efficiency, ensure the dry state of the PCB board in the test and subsequent processes, and avoid affecting the test results or product quality due to residual liquid. When the second cleaning module 4 enters the second box body 22, the plurality of second bamboo tubes 224 are respectively located above and below the second cleaning module 4. Since the second bamboo tube 224 is respectively located above and below the second cleaning module 4, and the gas nozzle 225 is a fan-shaped nozzle, it is ensured that the drying airflow can cover all surfaces of the PCB board. The bottoms of the first box 21 and the second box 22 are both connected to a waste liquid bucket 26 through a pipeline, and a capacitive proximity sensor is provided on the outer wall of the waste liquid bucket 26. The setting of the capacitive proximity sensor can detect the liquid level height in the waste liquid bucket 26 in real time. When the waste liquid reaches a certain level, the sensor can send a signal in time to remind the need to empty or replace the waste liquid bucket 26 to prevent overflow. In addition, compared to the traditional liquid level detection method, the capacitive proximity sensor can measure the liquid level without extending into the liquid, avoiding direct contact between the sensor and the liquid, and reducing the corrosion and contamination risks of the sensor.

[0053] Reference Figure 1 and Figure 5 , the outer walls of the first box body 21 and the second box body 22 are commonly connected with a ventilation pipe 23, and the ventilation pipe 23 is connected with a suction fan 9, and the suction fan 9 is fixedly installed on the top of the body 1. The isopropyl alcohol vapor generated during the cleaning process can be discharged in time by the suction fan 9 to prevent it from accumulating in the box, reduce the risk of fire and explosion, and improve the safety of the equipment. The outer walls of the first box body 21 and the second box body 22 are both fixedly installed with an isopropyl alcohol detector 8. Through the setting of the isopropyl alcohol detector 8, the isopropyl alcohol concentration of the cleaning box can be monitored in real time to ensure operation within a safe range. In addition, the isopropyl alcohol detector 8 can be linked with the ventilation system and the suction fan 9. When the concentration of isopropyl alcohol is detected to be increased, the ventilation and exhaust system is automatically started to quickly reduce the concentration of isopropyl alcohol to ensure safe operation.

[0054] Reference Figure 5A first cylinder 24 is fixedly installed on the side of the first box 21 away from the first cleaning module 3, and the piston rod of the first cylinder 24 passes through the outer wall of the first box 21 and is fixedly connected to the pipe joint 221 in the first box 21. A second cylinder 27 is fixedly installed on the side of the second box 22 away from the second cleaning module 4, and the piston rod of the second cylinder 27 passes through the outer wall of the second box 22 and is fixedly connected to the pipe joint 221 in the second box 22. In implementation, when the first cleaning module 3 or the second cleaning module 4 enters the first box 21 or the second box 22, the first cylinder 24 or the second cylinder 27 is started, and the piston rod of the first cylinder 24 or the second cylinder 27 can drive the pipe joint 221 in the first box 21 or the second box 22 and the corresponding nozzle to reciprocate, thereby improving the cleaning effect and drying effect of the PCB board.

[0055] Reference Figure 5 Since the first cleaning module 3 and the second cleaning module 4 have the same structure, the second cleaning module 4 is taken as an example to explain its structure in detail. Figure 6 The second cleaning module 4 includes a first slide cylinder 41 and a mounting frame 42, the mounting frame 42 is fixedly mounted on the slide of the first slide cylinder 41, the mounting frame 42 is connected to a closed plate 43 on one side close to the second box 22, the closed plate 43 is fixedly connected to a horizontally arranged tray 44 on one side close to the second box 22, and a groove 441 adapted to the size of the PCB board is provided on the top surface of the tray 44. The first box 21 and the second box 22 are both provided with a through groove for the first cleaning module 3 and the second cleaning module 4 to enter, and the size of the closed plate 43 is the same as that of the through groove. The size of the closed plate 43 is the same as that of the through groove. After the first cleaning module 3 and the second cleaning module 4 enter the cleaning box 2, the closed plate 43 can block the through groove to form a closed space, which can effectively prevent isopropyl alcohol gas and other cleaning solutions from leaking from the through groove, and ensure the sealing inside the cleaning box 2.

[0056] Reference Figure 3 and Figure 8 The drip module 6 includes an x-axis drive mechanism 61, a y-axis drive mechanism 62, a z-axis drive mechanism 63 and a drip tube 64. The x-axis drive mechanism 61 is installed on the y-axis drive mechanism 62, and the z-axis drive mechanism 63 is installed on the x-axis drive mechanism 61. It should be noted that the x-axis drive mechanism 61, the y-axis drive mechanism 62, and the z-axis drive mechanism 63 in the embodiment of the present application are all common drive mechanisms in the art, so the present application will not describe their structures in detail. Fig. 9A fixing plate 66 is fixedly connected to the z-axis driving mechanism 63, and the fixing plate 66 is arranged horizontally. A top plate 67 and a bottom plate 68 are fixedly installed on one end of the fixing plate 66 away from the z-axis driving mechanism 63. The top plate 67 and the bottom plate 68 are arranged horizontally, and the top plate 67 is located above the bottom plate 68. The dropper 64 is arranged vertically and detachably penetrated and installed on the top plate 67. A clearance groove 69 is provided on the bottom plate 68 just below the dropper 64. A metering pump 65 is also arranged on one side of the z-axis driving mechanism 63, and the metering pump 65 is connected to the dropper 64 through a pipeline. The metering pump 65 can accurately control the volume of each drop of liquid, ensure that the amount of liquid dropped onto the PCB board each time is consistent, and improve the accuracy and reliability of the hydrophobicity test.

[0057] Reference Fig.10 The camera module 7 includes a frame 71 and a camera 72. The frame 71 is located on one side of the drip module 6. The camera 72 is installed at an angle on the top of the frame 71. The installation angle of the camera 72 is the same as the angle at which the test module 5 drives the PCB board to flip. The end of the camera 72 close to the test module 5 is connected to a square light source 73. Fig.11 The test module 5 includes a second slide cylinder 51 and a U-shaped frame 52. The second slide cylinder 51 is fixedly installed below the frame 71. The U-shaped frame 52 is installed on the slide of the second slide cylinder 51. A rotating table 54 is rotatably arranged on the U-shaped frame 52. A flip motor 53 is installed on the side wall of the U-shaped frame 52. The output end of the flip motor 53 passes through the U-shaped frame 52 and is connected to the rotating table 54. The top surface of the rotating table 54 is connected to a test board 55. The middle part of the test board 55 is raised and the four corners of the raised part are provided with limit blocks 56. The limit blocks 56 are all L-shaped. A circle of drainage grooves 551 are provided around the raised part of the test board 55. Figure 3 After the second transfer mechanism 16 moves the PCB board to the test board 55 of the test module 5, the second slide cylinder 51 is started to drive the test board 55 to move to the bottom of the camera 72. First, the flip motor 53 is started to perform the first flip. During the flip, the camera 72 takes a picture of the PCB board on the test board 55. The installation angle of the camera 72 is the same as the angle at which the test module 5 drives the PCB board to flip. This ensures that the camera 72 always takes pictures of the PCB board at the best angle, captures the clearest and most detailed images, and improves the accuracy of the test results. In addition, the square light source 73 provides stable and uniform light, which enhances the contrast between different areas on the PCB board, making it easier for the camera 72 to identify and analyze details in the image, thereby improving the accuracy of detection. Combined with Figure 8 and Fig. 9After the test board 55 is flipped for the first time, it is reset. At this time, the dropper 64 is moved to the top of the PCB board by controlling the x-axis driving mechanism 61, the y-axis driving mechanism 62, and the z-axis driving mechanism 63, and the metering pump 65 is started to drip water. After dripping water, the dropper 64 is reset, and the flip motor 53 is started to drive the PCB board to flip for the second time. During the second flip, the camera 72 takes a picture of the PCB board, thereby completing the hydrophobicity test of the PCB board. After the second flip, the second slide cylinder 51 is started to drive the test board 55 to reset, and the second slide cylinder 51 is combined with the second slide cylinder 51 to drive the test board 55 to reset. Figure 3 and Figure 5 At this time, the second transfer mechanism 16 moves the PCB board to the tray 44 of the second cleaning module 4, starts the first slide cylinder 41 of the second cleaning module 4, drives the PCB board on the tray 44 into the second box 22 for isopropyl alcohol cleaning, and then performs a drying operation after cleaning. Figure 4 After drying, the first slide cylinder 41 is started again to drive the tray 44 and the PCB board to move out of the second box 22, and move to the unloading track 12 or the defective product track 13 through the first transfer mechanism 15. If the hydrophobicity test is qualified, it enters the unloading track 12, and if the hydrophobicity test is unqualified, it enters the defective product track 13.

[0058] In summary, the embodiment of the present application discloses a PCB board hydrophobicity test system and test method. The system includes a body 1, a fixed platform 14, a feeding track 11, a feeding track 12, a defective product track 13, a cleaning box 2, a first cleaning module 3, a second cleaning module 4, a test module 5, a camera module 7, a dripping module 6, a first transfer mechanism 15 and a second transfer mechanism 16. The cleaning box 2 is divided into a first box body 21 and a second box body 22, which are respectively used for cleaning and drying PCB boards. Cleaning and drying are completed by an isopropyl alcohol nozzle and a gas nozzle 225 arranged in the box body, and waste liquid management and safe exhaust are assisted by a waste liquid bucket 26, a capacitive proximity sensor, a ventilation pipe 23 and a suction fan 9. The camera module 7 includes a camera 72 and a square light source 73, and the dripping module 6 is composed of a driving mechanism, a dropper 64 and a metering pump 65. The system realizes automatic cleaning, photographing, dripping, drying and classification of PCB boards. By setting the sensors and cylinders, the whole process of PCB board loading, cleaning, drying, taking pictures, dripping, taking pictures again, and unloading is realized. This effectively solves the problems of low efficiency and precision in the traditional manual test process, improves the reliability and efficiency of the test, and at the same time, through the setting of the isopropyl alcohol detector 8 and the suction fan 9, the safety during the test is ensured, and the accumulation and leakage of isopropyl alcohol gas are avoided. By introducing a fully automatic PCB board hydrophobicity test system and method, efficient, accurate and safe full-process automated operation of PCB board hydrophobicity test is realized, effectively solving technical problems such as low efficiency and potential safety hazards in traditional test methods.

[0059] The present application also provides a PCB board hydrophobicity testing method, which is applied to the above-mentioned PCB board hydrophobicity testing system, and the method includes:

[0060] Clean the PCB with isopropyl alcohol;

[0061] The cleaned PCB board is turned over and photographed by the camera 72;

[0062] The PCB board is turned over and reset, and water is dripped onto the PCB board through the dropper 64;

[0063] The PCB board after dripping water is turned over again, and a photo is taken by the camera 72;

[0064] Turn the PCB over and reset it, clean it with isopropyl alcohol, and dry it.

[0065] In summary, in the embodiment of the present application, by performing a test when isopropanol is present on the PCB board, and then performing another test after dripping water, it is equivalent to performing a secondary test on the hydrophobicity or increasing the verification of the test. Through two tests, the hydrophobicity of the PCB board can be more comprehensively evaluated. The first test is performed on the PCB board after cleaning, and the cleaning effect and preliminary hydrophobic performance can be evaluated. The second test is performed on the PCB board after dripping water to further verify the hydrophobicity of the PCB board under the actual use environment. This multiple test method can effectively reduce the error that may be caused by a single test, and improve the accuracy and reliability of the test results. In addition, the setting of two tests can make it easier to find and eliminate potential quality problems. For example, if the first test shows that the hydrophobicity is good, and the second test shows that the hydrophobicity is not good, this may indicate that there are problems in the cleaning and drying process, or there are residues on the surface of the PCB board that affect the hydrophobicity. In this way, problems can be found earlier and more accurately, and corresponding adjustments and improvements can be made. Multiple tests can not only verify hydrophobicity, but also help optimize the cleaning and drying processes. By comparing the two test results, we can better adjust parameters such as the concentration of the cleaning solution, cleaning and drying time, and airflow intensity to ensure that each step achieves the best effect and further improve production efficiency and product quality.

[0066] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A PCB board hydrophobicity testing system, It is characterized in that include: A machine body, wherein a fixed platform is provided in the machine body, a loading track is provided on the fixed platform, and the loading track is respectively connected to a unloading track and a defective product track; A cleaning box, the cleaning box comprising a first box body and a second box body, the first box body is used to clean the PCB board, and the second box body is used to clean and dry the PCB board; A first cleaning module, the first cleaning module is located outside the first box, and the first cleaning module is used to send the PCB board into the first box; A second cleaning module, the second cleaning module is located outside the second box, and the second cleaning module is used to send the PCB board into the second box; the first cleaning module and the second cleaning module are arranged in parallel; A first transfer mechanism, the first transfer mechanism is located between the loading track and the first cleaning module, and the first transfer mechanism is used to move the PCB board from the loading track to the first cleaning module; A test module is used to drive the PCB board to move and flip. A second transfer mechanism is provided between the test module and the first cleaning module, and the second transfer mechanism is used to move the PCB board from the first cleaning module to the test module; a dripping module and a camera module are also provided on one side of the test module. The camera module is located above the test module and is used to take pictures of the PCB board, and the dripping module is used to move above the test module and drip water on the PCB board.

2. The PCB board hydrophobicity testing system according to claim 1, It is characterized in that The first cleaning module and the second cleaning module have the same structure. The second cleaning module includes a first slide cylinder and a mounting frame. The mounting frame is arranged on the slide of the first slide cylinder. A closed plate is provided on the side of the mounting frame close to the second box body. A horizontally arranged tray is connected to the closed plate on the side close to the second box body. A through groove for the second cleaning module to enter is provided on the side of the second box body close to the second cleaning module, and the closed plate has the same size as the through groove.

3. The PCB board hydrophobicity testing system according to claim 1, It is characterized in that The first box body and the second box body are both provided with pipe joints, and the pipe joints are connected to a first bamboo tube with a bent arrangement, and the end of the first bamboo tube away from the pipe joint is connected to a cleaning liquid nozzle, and the pipe joint is also connected to a cleaning liquid barrel through a pipe; the pipe joint in the second box body is also connected to a second bamboo tube with a bent arrangement, and the end of the second bamboo tube away from the pipe joint is connected to a gas nozzle; the bottoms of the first box body and the second box body are both connected to a waste liquid barrel through pipes, and the first box body and the second box body are commonly connected to a ventilation pipe, and the ventilation pipe is connected to a suction fan, and the suction fan is arranged on the top of the body.

4. The PCB board hydrophobicity testing system according to claim 3, It is characterized in that A first cylinder is provided on the side of the first box body away from the first cleaning module, and a piston rod of the first cylinder passes through the first box body and is connected to a pipe joint in the first box body; a second cylinder is provided on the side of the second box body away from the second cleaning module, and a piston rod of the second cylinder passes through the second box body and is connected to a pipe joint in the second box body.

5. The PCB board hydrophobicity testing system according to claim 3, It is characterized in that There are a plurality of the second bamboo tubes, and the plurality of the second bamboo tubes are respectively located above and below the second cleaning module, and the gas nozzle is a fan-shaped nozzle.

6. The PCB board hydrophobicity testing system according to claim 1, It is characterized in that The test module includes a second slide cylinder and a U-shaped frame, the second slide cylinder is arranged below the camera module, the U-shaped frame is arranged on the slide of the second slide cylinder, a rotating table is rotatably arranged on the U-shaped frame, a flip motor is installed on the side wall of the U-shaped frame, the output end of the flip motor passes through the U-shaped frame and is connected to the rotating table, the top surface of the rotating table is connected to a test plate, the middle part of the test plate is raised and limit blocks are arranged at the four corners of the raised part, and the limit blocks are L-shaped; a circle of drainage grooves are provided on the surrounding side of the raised part of the test plate.

7. The PCB board hydrophobicity testing system according to claim 1, It is characterized in that The camera module includes a frame and a camera. The frame is located on one side of the drip module. The camera is installed at an angle on the top of the frame. The installation angle of the camera is the same as the angle at which the test module drives the PCB board to flip. One end of the camera close to the test module is connected to a square light source.

8. The PCB board hydrophobicity testing system according to claim 1, It is characterized in that The dripping module includes an x-axis driving mechanism, a y-axis driving mechanism, a z-axis driving mechanism and a dropper, wherein the x-axis driving mechanism is arranged on the y-axis driving mechanism, the z-axis driving mechanism is arranged on the x-axis driving mechanism, and the dropper is arranged on the z-axis driving mechanism; the dropper is also connected to a metering pump through a pipeline.

9. The PCB board hydrophobicity testing system according to claim 1, It is characterized in that A photoelectric sensor is provided on the feeding track, a blocking cylinder is provided at the connection between the feeding track and the unloading track, and a barcode scanning gun is provided at the entrance of the feeding track.

10. A method for testing the hydrophobicity of a PCB board, applied to any one of the PCB board hydrophobicity testing systems as claimed in claims 1-9, It is characterized in that The method comprises: Clean the PCB with isopropyl alcohol; Turn over the cleaned PCB board and take a photo with a camera; Turn the PCB over and reset it, and drip water onto the PCB through a dropper; Turn the PCB board over again after dripping water, and take a photo with the camera; Turn the PCB over and reset it, clean it with isopropyl alcohol, and dry it.

Images