Automatic test platform

Abstract

The utility model discloses an automatic test platform, and relates to the technical field of circuit board testing, the automatic test platform is used for detecting a circuit board, the automatic test platform comprises a rack, a test tool, an electric cylinder assembly, a needle bed and a controller, the test tool is arranged on the rack and is used for installing the circuit board; the electric cylinder assembly comprises a mounting part, a driving motor and a telescopic part, the mounting part is connected to the rack, the driving motor is connected to the mounting part and provided with a driving shaft, and one end of the telescopic part is in transmission connection to the driving shaft so as to reciprocate in the direction close to or away from the circuit board; the needle bed is connected to the other end of the telescopic piece and used for abutting against the side, away from the test tool, of the circuit board; the controller is arranged on the rack and electrically connected with the driving motor so as to control the driving stroke of the driving motor. According to the scheme, the test efficiency of the automatic test platform can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board testing, in particular to an automatic testing platform. Background Art

[0002] Printed Circuit Board Assembly (PCBA) is the process of mounting electronic components onto a circuit board through methods such as soldering. The assembled circuit board then undergoes functional testing to ensure it meets production requirements.

[0003] In related technologies, the automated testing platform includes a test tool, a cylinder assembly, and a needle bed. The test tool is used to install the circuit board. The telescopic end of the cylinder assembly is connected to the needle bed, which is used to drive the probe of the needle bed to abut the contacts on the circuit board to ensure subsequent functional testing of the circuit board.

[0004] However, in order to test different circuit boards, multiple types of test fixtures are generally provided, and the telescopic stroke of the cylinder assembly is generally fixed. When the test fixture is replaced, it is often necessary to reinstall a cylinder assembly with a different telescopic stroke, resulting in low testing efficiency of the automated test platform. Utility Model Content

[0005] The main purpose of the utility model is to propose an automated testing platform, which aims to adjust the telescopic stroke of the telescopic part, and then meet the requirements of the needle bed to maintain the pressure of the circuit boards on different test fixtures, so as to improve the testing efficiency of the automated testing platform.

[0006] To achieve the above-mentioned purpose, the utility model proposes an automated testing platform, which is used for detecting circuit boards. The automated testing platform includes a frame, a test fixture, an electric cylinder assembly, a needle bed and a controller. The test fixture is arranged on the frame for mounting the circuit board; the electric cylinder assembly includes a mounting part, a drive motor and a telescopic part, the mounting part is connected to the frame, the drive motor is connected to the mounting part, the drive motor has a drive shaft, one end of the telescopic part is transmission-connected to the drive shaft to reciprocate in a direction close to or away from the circuit board; the needle bed is connected to the other end of the telescopic part, and the needle bed is used to abut the side of the circuit board away from the test fixture; the controller is arranged on the frame and electrically connected to the drive motor to control the driving stroke of the drive motor.

[0007] In one embodiment, the electric cylinder assembly further includes a transmission member, which includes a screw and a nut. The screw is transmission-connected to the drive shaft, the nut is threadedly connected to the screw to translate along the length of the screw, and one end of the telescopic member is connected to the nut.

[0008] In one embodiment, the electric cylinder assembly further includes a stroke detection assembly, which is communicatively connected to the controller. The stroke detection assembly includes a first transmitter and a first receiver, wherein the first transmitter is provided on the screw to rotate with the screw, and the first receiver is provided on the mounting member to receive a signal from the first transmitter, and the controller determines the number of rotations of the screw based on the received signal.

[0009] In one embodiment, the drive motor and the screw are arranged side by side in a direction perpendicular to the vertical direction, and the transmission member further includes a first transmission wheel and a second transmission wheel, the first transmission wheel is connected to the drive shaft for rotation, and the second transmission wheel is sleeved on the screw and is transmission-connected to the first transmission wheel to drive the screw to rotate.

[0010] In one embodiment, the frame is provided with a positioning hole parallel to the movement direction of the telescopic member, and a sliding portion is protruded from a side of the telescopic member away from the needle plate, and the sliding portion is movably provided in the positioning hole.

[0011] In one embodiment, there are a plurality of positioning holes, which are spaced apart on the frame; there are a plurality of sliding parts, which are spaced apart on the telescopic member; and one sliding part is passed through one positioning hole.

[0012] In one embodiment, the telescopic member includes a piston rod and a pressure plate, the piston rod is transmission-connected to the drive shaft, one side of the pressure plate is connected to the piston rod, and the other side is connected to the needle bed.

[0013] In one embodiment, the pressure plate is provided with two stoppers protruding from a side facing the circuit board. The two stoppers are spaced apart perpendicularly to the vertical direction and enclose a mounting slot. A latch portion is provided protruding from an opening edge of the mounting slot perpendicular to the vertical direction. The needle bed is disposed in the mounting slot to limit the needle bed's position in the vertical direction. Furthermore, the pressure plate is larger than the needle bed.

[0014] In one embodiment, the automated testing platform further includes a safety detection component, which includes a second transmitter and a second receiver, the second transmitter and the second receiver being arranged side by side on the frame, the second receiver being used to receive a signal from the second transmitter, and the controller controlling the working state of the drive motor according to the received signal from the second receiver.

[0015] In one embodiment, the automated testing platform further includes an alarm component, which is disposed on the rack. The controller controls the working state of the alarm component according to the detection result of the circuit board.

[0016] In the technical solution of the present utility model, the test tooling is arranged on a frame and is used to install a circuit board. After receiving the pulse signal from the controller, the driving motor drives the telescopic part to reciprocate in the direction of approaching or moving away from the circuit board, thereby driving the probe of the needle bed to abut against the contact side of the circuit board to ensure subsequent functional testing of the circuit board.

[0017] It is worth noting that by setting the control parameters of the controller and controlling the number of rotations of the motor drive shaft, the telescopic stroke of the telescopic part can be adjusted, thereby satisfying the press machine's pressure maintenance of circuit boards on different test fixtures. Subsequently, when the test fixture is replaced, there is no need to replace the electric cylinder assembly, which is beneficial to improving the test efficiency of the automated test platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a structural diagram of an embodiment of the automated testing platform provided by the present utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the cross-section structure of the automated test platform shown;

[0021] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the transmission component;

[0022] Figure 4 This is a workflow diagram of an embodiment of an automated testing platform;

[0023] Figure 5 This is a workflow diagram of another embodiment of the automated testing platform.

[0024] Explanation of the accompanying drawings: 10. Automated test platform; 1. Frame; 11. Mounting cavity; 13. Positioning hole; 3. Test fixture; 5. Electric cylinder assembly; 51. Mounting part; 511. Storage cavity; 53. Drive motor; 531. Drive shaft; 54. Transmission part; 541. First transmission wheel; 543. Second transmission wheel; 55. Telescopic part; 551. Piston rod; 5551. Joint; 553. Press plate; 5531. Sliding part; 56. Stroke detection assembly; 6. Needle bed; 61. Needle plate; 63. Probe; 71. Controller; 73. Safety detection assembly; 731. Second transmitting part; 733. Second receiving part; 75. Button; 8. Circuit board.

[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] Printed Circuit Board Assembly (PCBA) is the process of mounting electronic components onto a circuit board through methods such as soldering. The assembled circuit board then undergoes functional testing to ensure it meets production requirements.

[0030] In related technologies, the automated testing platform includes a test tool, a cylinder assembly, and a needle bed. The test tool is used to install the circuit board. The telescopic end of the cylinder assembly is connected to the needle bed, which is used to drive the probe of the needle bed to abut the contacts on the circuit board to ensure subsequent functional testing of the circuit board.

[0031] However, in order to test different circuit boards, multiple types of test fixtures are generally provided, and the telescopic stroke of the cylinder assembly is generally fixed. When the test fixture is replaced, it is often necessary to reinstall a cylinder assembly with a different telescopic stroke, resulting in low testing efficiency of the automated test platform.

[0032] In order to solve the above problems, the present invention proposes an automated testing platform 10, which aims to adjust the telescopic stroke of the telescopic part 55, thereby satisfying the needle bed to maintain pressure on the circuit boards 8 on different test fixtures 3, thereby improving the testing efficiency of the automated testing platform 10.

[0033] Reference Figures 1 to 5 In one embodiment of the present utility model, the automated testing platform 10 is used to detect a circuit board 8. The automated testing platform 10 includes a frame 1, a test fixture 3, an electric cylinder assembly 5, a needle bed 6 and a controller 71. The test fixture 3 is provided on the frame 1 for mounting the circuit board 8; the electric cylinder assembly 5 includes a mounting member 51, a drive motor 53 and a telescopic member 55. The mounting member 51 is connected to the frame 1, and the drive motor 53 is connected to the mounting member 51. The drive motor 53 has a drive shaft 531. One end of the telescopic member 55 is transmission-connected to the drive shaft 531 to reciprocate in a direction approaching or away from the circuit board 8; the needle bed 6 is connected to the other end of the telescopic member 55, and the needle bed 6 is used to abut the side of the circuit board 8 away from the test fixture 3; the controller 71 is provided on the frame 1 and is electrically connected to the drive motor 53 to control the driving stroke of the drive motor 53.

[0034] The frame 1 is provided with a mounting cavity 11 for mounting the electric cylinder assembly 5. The mounting member 51 of the electric cylinder assembly 5 houses a storage cavity 511, which houses the drive system consisting of a drive motor 53. The outer wall of the storage cavity 511 is connected to the wall of the mounting cavity 11. The test fixture 3 can be considered a fixture assembly, which is used to clamp the circuit board 8. The needle bed 6 includes a connected needle plate 61 and a probe 63. One side of the needle plate 61 is connected to the telescopic member 55.

[0035] In the technical solution of the present invention, the test tool 3 is arranged on the frame 1 and is used to install the circuit board 8. After receiving the pulse signal from the controller 71, the driving motor 53 drives the telescopic part 55 to reciprocate in the direction of approaching or moving away from the circuit board 8, thereby driving the probe 63 of the needle bed 6 to abut against the contact side of the circuit board 8 to ensure subsequent functional testing of the circuit board 8.

[0036] It is worth noting that by setting the control parameters of the controller 71 and controlling the number of rotations of the motor drive shaft 531, the telescopic stroke of the telescopic part 55 can be adjusted, thereby satisfying the press machine's pressure maintenance of the circuit boards 8 on different test fixtures 3. Subsequently, when the test fixture 3 is replaced, there is no need to replace the electric cylinder assembly 5, which is beneficial to improving the test efficiency of the automated test platform 10.

[0037] Optionally, a knob is further provided on the rack 1, and by pressing the button 75, the automated test platform 10 can be started, stopped or emergency stopped.

[0038] Reference Figures 1 to 5 In one embodiment of the present invention, the electric cylinder assembly 5 also includes a transmission member 54, which includes a screw and a nut. The screw is transmission-connected to the drive shaft 531, and the nut is threadedly connected to the screw to translate along the length direction of the screw. One end of the telescopic member 55 is connected to the nut.

[0039] In this embodiment, the screw and nut cooperate to achieve very precise position control. Due to the characteristics of the thread, the nut's movement distance along the screw is fixed, which helps improve the telescopic accuracy of the telescopic member 55, thereby ensuring that the probe 63 accurately triggers the circuit board 8, which is conducive to improving test accuracy.

[0040] Reference Figures 1 to 3In one embodiment of the present invention, the electric cylinder assembly 5 also includes a stroke detection assembly 56, which is communicatively connected to the controller 71. The stroke detection assembly 56 includes a first transmitter and a first receiver. The first transmitter is provided on the screw to rotate with the screw. The first receiver is provided on the mounting member 51 to receive a signal from the first transmitter. The controller 71 determines the number of rotations of the screw based on the received signal.

[0041] In this embodiment, the stroke detection component 56 can accurately detect the number of rotations of the screw, and thus determine the stroke of the telescopic member 55. The signal transmission between the first transmitter and the first receiver provides real-time feedback to the controller 71, which can immediately adjust the position of the telescopic member 55 to achieve the desired pressure or contact state.

[0042] Reference Figures 1 to 3 In one embodiment of the present invention, the drive motor 53 and the screw are arranged side by side in a direction perpendicular to the vertical direction, and the transmission member 54 also includes a first transmission wheel 541 and a second transmission wheel 543. The first transmission wheel 541 is connected to the drive shaft 531 for rotation, and the second transmission wheel 543 is sleeved on the screw and is transmission-connected to the first transmission wheel 541 to drive the screw to rotate.

[0043] In this embodiment, arranging the drive motor 53 and the screw rod side by side can save space, making the entire electric cylinder assembly 5 more compact and suitable for installation in a limited space.

[0044] Optionally, by combining the first transmission wheel 541 and the second transmission wheel 543 with different diameters, variable speed transmission can be achieved to meet the requirements of different test speeds.

[0045] Reference Figures 1 to 3 In one embodiment of the present invention, the frame 1 is provided with a positioning hole 13 parallel to the movement direction of the telescopic member 55, and a sliding portion 5531 is protruded from the side of the telescopic member 55 away from the needle plate 61, and the sliding portion 5531 is movably passed through the positioning hole 13.

[0046] In this embodiment, the cooperation between the positioning hole 13 and the sliding part 5531 ensures the stable guidance of the telescopic part 55 during movement, preventing it from shifting or shaking. The stable guidance helps to improve the test accuracy and ensure good contact between the needle bed 6 and the circuit board 8.

[0047] Reference Figures 1 to 3In one embodiment of the present invention, there are multiple positioning holes 13, and multiple positioning holes 13 are arranged at intervals on the frame 1. There are multiple sliding parts 5531, and multiple sliding parts 5531 are arranged at intervals on the telescopic part 55. One sliding part 5531 is passed through one positioning hole 13.

[0048] In this embodiment, by pairing the plurality of sliding portions 5531 with the plurality of positioning holes 13 , the stability of the telescopic member 55 during movement can be significantly enhanced, and the enhanced stability helps to improve the accuracy and reliability of the test.

[0049] Reference Figures 1 to 3 In one embodiment of the present invention, the telescopic member 55 includes a piston rod 551 and a pressure plate 553, the piston rod 551 is transmission-connected to the drive shaft 531, one side of the pressure plate 553 is connected to the piston rod 551, and the other side is connected to the needle bed 6.

[0050] In this embodiment, the design of the piston rod 551 and the pressure plate 553 can withstand a large load and is suitable for test scenarios that require applying a certain pressure. The improvement in load capacity helps to expand the application scope of the automated testing platform 10.

[0051] Optionally, the material of the pressing plate 553 is set to be an aluminum plate. Aluminum plate is lighter than other metal materials, which helps to reduce the overall weight of the telescopic member 55. One end of the piston rod 551 is connected to one end of the joint 5551, and the other end of the joint 5551 is detachably connected to the needle plate 61.

[0052] Reference Figures 1 to 3 In one embodiment of the present invention, the pressure plate 553 has two stoppers protruding from one side facing the circuit board 8. The two stoppers are spaced apart perpendicularly to the vertical direction and enclose a mounting slot. A latch portion protrudes from the opening edge of the mounting slot perpendicular to the vertical direction. The needle bed 6 is mounted in the mounting slot to limit the position of the needle bed 6 in the vertical direction. Alternatively, the pressure plate 553 is larger than the needle bed 6.

[0053] In this embodiment, the design of the stopper and mounting slot ensures that the needle bed 6 is precisely installed in the predetermined position. The design of the bayonet ensures the vertical stability of the needle bed 6, preventing movement or shaking during testing, thereby helping to improve the consistency and repeatability of the test.

[0054] Optionally, the size of the pressure plate 553 is set to be larger than the size of the needle bed 6 to ensure that the needle bed 6 does not extend beyond the edge of the pressure plate 553, thereby avoiding unnecessary pressure or damage to the circuit board 8. This protective measure helps prevent damage to the circuit board 8 and improves the success rate of the test.

[0055] Reference Figures 1 to 3 In one embodiment of the present utility model, the automated testing platform 10 further includes a safety detection component 73, which includes a second transmitter 731 and a second receiver 733. The second transmitter 731 and the second receiver 733 are arranged side by side on the frame 1, and the second receiver 733 is used to receive the signal of the second transmitter 731. The controller 71 controls the working state of the drive motor 53 according to the received signal of the second receiver 733.

[0056] The second transmitting element 731 and the second receiving element 733 may be selected as matching grating components.

[0057] In this embodiment, the safety detection component 73 can detect whether there are workers in the construction area of the equipment. When workers are detected, it is determined that the situation is unsafe, and the controller 71 can immediately stop driving the motor 53 to prevent accidents.

[0058] Reference Figures 1 to 3 In one embodiment of the present invention, the automated testing platform 10 further includes an alarm component, which is disposed on the rack 1 . The controller 71 controls the working state of the alarm component according to the detection result of the circuit board 8 .

[0059] In this embodiment, the alarm component can immediately issue an alarm for unqualified circuit boards 8 to alert the operator. The instant feedback helps to improve the test efficiency and reduce the outflow of erroneous products.

[0060] Optionally, the alarm component can be designed to support multiple alarm modes, such as sound, light, or vibration. For example, the program can send corresponding commands to the sound and light alarm through the RS485 interface to control the alarm and light to achieve the purpose of prompting. Blue indicates waiting for test, yellow indicates testing, green indicates test passed, red indicates test failure, and flashing red and alarm sound indicates an error has occurred.

[0061] In summary, current PCBA testing typically uses separate fixtures, resulting in complex structures, high manufacturing and assembly costs, long production cycles, and complex height adjustment. Each fixture requires its own cylinder, resulting in uneven force distribution, influenced by air compressor pressure and the site. This hinders rapid response and identification when errors occur during testing. Existing fixtures typically install different cylinders based on the product's functional size, but the larger size of the board under test results in uneven force distribution.

[0062] The automated testing platform 10 of this embodiment utilizes a programmable electric cylinder. Different test fixtures 3 do not require separate cylinders. The height can be easily adjusted by simply adjusting parameters on the PLC display. This ensures uniform force distribution on the needle bed 6 for functional testing of large PCBAs. When errors occur, the platform immediately responds with a corresponding color and an alarm sound. The test program displays error information, allowing engineers to quickly identify and resolve the issue.

[0063] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An automated testing platform, characterized in that: Applied to testing circuit boards, the automated testing platform includes: frame; A test fixture, which is provided on the rack and is used to install the circuit board; An electric cylinder assembly, comprising a mounting member, a drive motor, and a telescopic member, wherein the mounting member is connected to the frame, the drive motor is connected to the mounting member, the drive motor has a drive shaft, and one end of the telescopic member is drivingly connected to the drive shaft to reciprocate in a direction approaching or moving away from the circuit board; a needle bed connected to the other end of the telescopic member, the needle bed being used to abut against a side of the circuit board facing away from the test fixture; and A controller is provided on the frame and electrically connected to the drive motor to control the drive stroke of the drive motor.

2. The automated testing platform according to claim 1, wherein: The electric cylinder assembly also includes a transmission member, which includes a screw and a nut. The screw is transmission-connected to the drive shaft, and the nut is threadedly connected to the screw to translate along the length of the screw. One end of the telescopic member is connected to the nut.

3. The automated testing platform according to claim 2, wherein: The electric cylinder assembly also includes a stroke detection assembly, which is communicatively connected to the controller. The stroke detection assembly includes a first transmitter and a first receiver. The first transmitter is provided on the screw to rotate with the screw. The first receiver is provided on the mounting member to receive a signal from the first transmitter. The controller determines the number of rotations of the screw based on the received signal.

4. The automated testing platform according to claim 2, wherein: The drive motor and the screw are arranged side by side in a direction perpendicular to the vertical direction. The transmission member also includes a first transmission wheel and a second transmission wheel. The first transmission wheel is connected to the drive shaft for rotation, and the second transmission wheel is sleeved on the screw and is transmission-connected to the first transmission wheel to drive the screw to rotate.

5. The automated testing platform according to any one of claims 1 to 4, characterized in that: The frame is provided with a positioning hole parallel to the moving direction of the telescopic member. A sliding part is protruded from the side of the telescopic member away from the needle bed, and the sliding part is movably provided in the positioning hole.

6. The automated testing platform according to claim 5, wherein: There are a plurality of positioning holes, which are spaced apart on the frame. There are a plurality of sliding parts, which are spaced apart on the telescopic member. One sliding part is passed through one positioning hole.

7. The automated testing platform according to any one of claims 1 to 4, characterized in that: The telescopic member includes a piston rod and a pressing plate. The piston rod is connected to the driving shaft through transmission. One side of the pressing plate is connected to the piston rod, and the other side is connected to the needle bed.

8. The automated testing platform according to claim 7, wherein: Two limiting parts are protruded from one side of the pressure plate toward the circuit board. The two limiting parts are spaced apart and perpendicular to the vertical direction and enclose a mounting slot. A bayonet part is protruded from the opening edge of the mounting slot perpendicular to the vertical direction. The needle bed is arranged in the mounting slot to limit the position of the needle bed in the vertical direction. And / or, the size of the pressing plate is larger than the size of the needle bed.

9. The automated testing platform according to any one of claims 1 to 4, characterized in that: The automated testing platform also includes a safety detection component, which includes a second transmitter and a second receiver. The second transmitter and the second receiver are arranged side by side on the frame, and the second receiver is used to receive the signal of the second transmitter. The controller controls the working state of the drive motor according to the received signal of the second receiver.

10. The automated testing platform according to any one of claims 1 to 4, characterized in that: The automated testing platform further includes an alarm component, which is disposed on the rack. The controller controls the working state of the alarm component according to the detection result of the circuit board.

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