PCB board plug-in component pin length anomaly detection device

Abstract

The utility model discloses PCB board plug -in element pin length abnormal detection device, including the ruler fine adjustment sliding table, first fixed seat, detection axle and second fixed seat, the first fixed seat is fixedly installed in the top of ruler fine adjustment sliding table through bolt, the second fixed seat fixedly installed in the top of first fixed seat, detection axle rotates and is installed on the second fixed seat, when PCB board plug -in element pin length is abnormal, promotes detection axle rotation, when PCB board plug -in element rear pin is not cut off length abnormality, when conveying through detection axle, abnormal pin will be hung on detection axle, and detection axle stress swings, and the positioning piece synchronous deflection and shield the light path of photoelectric sensor, and photoelectric sensor sends signal to PLC, and PLC output signal to the collection board machine, and the collection board machine receives the signal and will stop immediately alarm, ensure that the abnormal PCB board is intercepted before entering next procedure, avoid batch quality accident.

Description

Technical Field

[0001] This utility model relates to the field of PCB board technology, specifically to a device for detecting abnormal pin lengths of PCB board plug-in components. Background Technology

[0002] With the trend towards miniaturization and high integration of electronic devices, the pin density and precision requirements of components on PCBs are increasing. During the component insertion process, component pins need to be precisely inserted into the pad holes on the PCB, and electrical connections are achieved through subsequent processes (such as wave soldering and reflow soldering).

[0003] However, in actual production, due to fluctuations in the precision of the insertion equipment, deviations in component dimensions, or operational errors, there may be abnormal situations where the pins are not completely cut to the specified length after insertion. Uncut pins usually extend 0.5mm to several millimeters beyond the edge of the PCB board, making them difficult to identify with the naked eye. Moreover, they are not likely to interfere with the equipment during normal transmission. If abnormal pins enter subsequent processes (such as wave soldering), they may cause serious quality problems such as short circuits and poor soldering, or even damage the equipment. Therefore, we need to propose a PCB board insertion component pin length abnormality detection device. Utility Model Content

[0004] The purpose of this invention is to provide a PCB board component pin length abnormality detection device, which can identify abnormal pins during PCB board transmission and trigger a shutdown alarm for downstream equipment, thereby avoiding batch quality accidents and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A device for detecting abnormal pin length of PCB board plug-in components includes a fine-tuning slide, a first fixed base, a detection shaft, and a second fixed base. The first fixed base is fixedly installed on the top of the fine-tuning slide by bolts, and the second fixed base is fixedly installed on the top of the first fixed base. The detection shaft is rotatably installed on the second fixed base. When the pin length of the PCB board plug-in component is abnormal, the detection shaft is pushed to rotate.

[0007] One end of the detection shaft passes through the second fixed base and is fixedly mounted with a positioning plate. A photoelectric sensor that works in conjunction with the positioning plate is installed below the radial edge of the positioning plate. The output end of the photoelectric sensor is connected to the PLC controller.

[0008] Preferably, a photoelectric fixing plate is fixedly installed at the bottom of one end of the second fixing base, and the photoelectric sensor is fixedly installed on the top surface of one end of the photoelectric fixing plate.

[0009] Preferably, flange bearings are fixedly installed at both ends of the second fixed seat, and both ends of the detection shaft are fixedly inserted into the inner rings of the two sets of flange bearings.

[0010] Preferably, the end of the detection shaft away from the positioning piece passes through the second fixing seat and is fixedly sleeved with a retaining sleeve, and a stop block for limiting the axial displacement range of the retaining sleeve is fixedly installed at one end of the second fixing seat.

[0011] Preferably, a fixing plate is fixedly installed on one side of the fine-tuning slide, and the fixing plate has fixing holes for connecting an external frame.

[0012] Preferably, it also includes a spring hook, which is fixedly installed on the side wall of one end of the second fixing seat.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] When the pins of the PCB board are not cut off after insertion, the abnormal pins will be caught on the detection shaft as the board is conveyed through it. The detection shaft will swing under force, and the positioning plate will deflect synchronously and block the light path of the photoelectric sensor. The photoelectric sensor will send a signal to the PLC, and the PLC will output a signal to the board take-up machine. Upon receiving the signal, the board take-up machine will immediately stop and alarm, ensuring that the abnormal PCB board is intercepted before entering the next process and avoiding batch quality accidents. Attached Figure Description

[0015] Figure 1 This is a side view of the three-dimensional structure of the present invention;

[0016] Figure 2 This is a front view of the structure of this utility model.

[0017] In the diagram: 1. Measuring slide; 2. First fixed seat; 3. Detection shaft; 4. Second fixed seat; 5. Flange bearing; 6. Positioning plate; 7. Photoelectric sensor; 8. Sleeve; 9. Stop block; 10. Fixing plate; 11. Photoelectric fixing plate; 12. Spring hook. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-2 This utility model provides a technical solution:

[0020] A device for detecting abnormal pin length of PCB board plug-in components includes a fine-tuning slide 1, a first fixed seat 2, a detection shaft 3, and a second fixed seat 4. The first fixed seat 2 is fixedly installed on the top of the fine-tuning slide 1 by bolts, and the second fixed seat 4 is fixedly installed on the top of the first fixed seat 2. The detection shaft 3 is rotatably installed on the second fixed seat 4. When the pin length of the PCB board plug-in component is abnormal, the detection shaft 3 is pushed to rotate.

[0021] The micrometer adjustment slide 1 can achieve micron-level adjustment, ensuring accurate contact between the detection axis 3 and the pins of the PCB board plug-in components. The mounting base adopts a layered installation method, which is convenient for disassembly and maintenance, while improving overall rigidity and reducing vibration interference.

[0022] One end of the detection shaft 3 passes through the second fixed base 4 and is fixedly installed with a positioning plate 6. A photoelectric sensor 7 that works with the positioning plate 6 is installed below the radial edge of the positioning plate 6. The output end of the photoelectric sensor 7 is connected to the PLC controller.

[0023] The photoelectric sensor is a Panasonic PM-L25, with an adjustable detection distance of 10~300mm, a response time of 0.5ms, and an output method of NPN / PNP selectable (matching PLC input type). Features include a red LED light source, resistance to ambient light interference, and IP67 protection. The PLC controller is a Siemens S7-1200 1214C DC / DC / DC, with 14 digital inputs (at least one point must receive the photoelectric sensor signal), a communication interface of PROFINET (facilitating integration into MES systems), and programming software of TIA Portal (supporting function block programming).

[0024] Non-contact detection, photoelectric sensor 7 has no mechanical wear, fast response speed (millisecond level), suitable for high-speed production lines. By changing the deflection angle of positioning piece 6, it can accurately determine whether the pin length exceeds the tolerance range. Photoelectric sensor 7 directly outputs digital signals to PLC and has strong anti-electromagnetic interference capability.

[0025] Specifically, a photoelectric fixing plate 11 is fixedly installed at one bottom end of the second fixing base 4, and a photoelectric sensor 7 is fixedly installed on the top surface of one end of the photoelectric fixing plate 11.

[0026] The photoelectric fixing plate 11 can be finely adjusted to optimize the detection angle of the photoelectric sensor 7. The structure of the photoelectric fixing plate 11 reduces the impact of external vibration on the sensor and improves detection stability.

[0027] Specifically, flange bearings 5 ​​are fixedly installed at both ends of the second fixed seat 4, and both ends of the detection shaft 3 are fixedly inserted into the inner rings of the two sets of flange bearings 5.

[0028] The low-friction, high-rigidity structure of the flange bearing 5 provides high-precision support, reduces the rotational resistance of the detection shaft 3, improves the response speed, and ensures the dynamic stability of the detection shaft 3 in high-speed transmission, making it suitable for high-frequency detection scenarios.

[0029] Specifically, the end of the detection shaft 3 away from the positioning piece 6 passes through the second fixed seat 4 and is fixedly sleeved with a retaining sleeve 8. A stop block 9 for limiting the axial displacement range of the retaining sleeve 8 is fixedly installed at one end of the second fixed seat 4.

[0030] To prevent excessive deflection of the detection axis 3, avoid damage to the detection axis 3 due to external impact, and ensure that the deflection angle of the positioning piece 6 is within the effective detection range of the photoelectric sensor 7.

[0031] Specifically, a fixing plate 10 is fixedly installed on one side of the fine-tuning slide 1, and the fixing plate 10 has fixing holes for connecting to an external frame.

[0032] The standardized mounting hole design facilitates integration into automated production lines and ensures that the testing device remains secure even during high-speed operation.

[0033] Specifically, it also includes a spring hook 12, which is fixedly installed on the side wall of one end of the second fixed seat 4.

[0034] The spring hook 12 is used to connect the reset spring (not shown in the figure), so that the detection shaft 3 automatically returns to its original position after rotation, reducing manual intervention and improving detection efficiency.

[0035] Working principle: When in use, this utility model is connected to an external frame through the fixing holes on the fixing plate 10. When the PCB board is conveyed through the detection shaft 3, the abnormal pins after insertion will be caught on the detection shaft 3. The detection shaft 3 will swing under force, and the positioning plate 6 will deflect synchronously and block the light path of the photoelectric sensor 7. The photoelectric sensor 7 will send a signal to the PLC, and the PLC will output a signal to the board receiving machine. When the board receiving machine receives the signal, it will immediately stop and alarm, ensuring that the abnormal PCB board is intercepted before entering the next process and avoiding batch quality accidents.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting abnormal pin lengths of PCB board plug-in components, characterized in that, It includes a fine-tuning slide (1), a first fixed seat (2), a detection shaft (3), and a second fixed seat (4). The first fixed seat (2) is fixedly installed on the top of the fine-tuning slide (1) by bolts. The second fixed seat (4) is fixedly installed on the top of the first fixed seat (2). The detection shaft (3) is rotatably installed on the second fixed seat (4). When the pin length of the plug-in component on the PCB board is abnormal, the detection shaft (3) is pushed to rotate. One end of the detection shaft (3) passes through the second fixed seat (4) and is fixedly installed with a positioning piece (6). A photoelectric sensor (7) that works in conjunction with the positioning piece (6) is installed below the radial edge of the positioning piece (6). The output end of the photoelectric sensor (7) is connected to the PLC controller.

2. The PCB board component pin length abnormality detection device according to claim 1, characterized in that: A photoelectric fixing plate (11) is fixedly installed at one end of the bottom of the second fixing base (4), and the photoelectric sensor (7) is fixedly installed on the top surface of one end of the photoelectric fixing plate (11).

3. The PCB board component pin length abnormality detection device according to claim 1, characterized in that: Both ends of the second fixed seat (4) are fixedly installed with flange bearings (5), and both ends of the detection shaft (3) are fixedly inserted into the inner rings of the two sets of flange bearings (5).

4. The PCB board component pin length abnormality detection device according to claim 1, characterized in that: The end of the detection shaft (3) away from the positioning piece (6) passes through the second fixed seat (4) and is fixedly sleeved with a retainer (8). A stop block (9) for limiting the axial displacement range of the retainer (8) is fixedly installed at one end of the second fixed seat (4).

5. The PCB board component pin length abnormality detection device according to claim 1, characterized in that: A fixing plate (10) is fixedly installed on one side of the micrometer adjustment slide (1), and the fixing plate (10) has fixing holes for connecting an external frame.

6. The PCB board component pin length abnormality detection device according to claim 1, characterized in that: It also includes a spring hook (12), which is fixedly installed on the side wall of one end of the second fixed seat (4).

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