Automatic flying probe testing machine

Abstract

The utility model discloses an automatic flying probe testing machine, which comprises a testing rack, the testing rack is provided with a mobile conveying line used for driving a circuit board to enter and exit from the testing machine, the mobile conveying line comprises a feeding part, a detection part and a discharging part, and the detection part is provided with a testing unit used for detecting the fed circuit board; a positioning mechanism used for positioning the circuit board at the detection part is arranged along the conveying direction of the movable conveying line, and the positioning mechanism comprises an in-place sensor located at the end part of the detection part along the conveying direction and positioning clamps arranged at the two sides of the conveying line corresponding to the area of the detection part; according to the utility model, the movable conveying line is used for feeding and discharging conveying of the circuit board, the circuit board is driven to move forwards by friction force generated by movement of the conveying belt, and the circuit board is positioned through the positioning clamp and is not influenced by arrangement of components on the circuit board, so that rapid transfer is realized, and the equipment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board testing equipment, and particularly relates to an automatic flying probe tester. Background Art

[0002] When conducting conduction testing on a circuit board, a flying probe tester is required. After moving the circuit board to the testing area, it is tested with probes. However, for the loading and unloading of circuit boards in existing testers, suction cups are generally used in cooperation with manipulators for clamping and moving. Since the distribution of electrical components on different types of circuit boards is different, the clamping area will change, resulting in an increase in equipment costs. At the same time, high positioning accuracy is required, and the circuit board is easily damaged due to positioning problems. Also, when replacing the circuit board after testing is completed, the waiting process is relatively long. It is necessary to take away the circuit board and then load and replace it, which affects the testing efficiency. Summary of the Utility Model

[0003] Technical Objective: Aiming at the deficiencies existing in the above-mentioned existing circuit board testing, the utility model discloses an automatic flying probe tester that can reduce the waiting time of the loading and unloading process and can quickly convey and position the circuit board.

[0004] Technical Solution: To achieve the above technical objective, the utility model adopts the following technical solution:

[0005] An automatic flying probe tester includes a testing machine frame. A moving conveyor line for driving the circuit board in and out of the tester is arranged on the testing machine frame. The moving conveyor line includes a feeding part, a detection part, and a discharging part. A testing unit for detecting the circuit board conveyed into the detection part is arranged in the detection part. A positioning mechanism for positioning the circuit board in the detection part is arranged along the conveying direction of the moving conveyor line. The positioning mechanism includes a in-place sensor located at the end of the detection part along the conveying direction, and positioning jigs arranged on both sides of the conveyor line corresponding to the detection part area.

[0006] Preferably, the positioning jigs of the utility model are divided into an upper jig, a lower jig, and a side jig. The upper jig and the lower jig are both provided with clamping plates for clamping on both sides of the circuit board. The side jig is located in the middle of the circuit board in the height direction. After the circuit board is clamped and fixed by the upper jig and the lower jig, the middle of the circuit board is clamped and supported by the side jig.

[0007] Preferably, along the conveying direction of the moving conveyor line, guide plates for guiding the movement of the circuit board are arranged at the upper and lower positions of the feeding part and the discharging part. The guide plates are symmetrically located on both sides of the moving conveyor line.

[0008] Preferably, the guide plate of the present utility model corresponds to the clamping plates of the upper fixture or the lower fixture at the corresponding position. In the open state of the clamping plates, the circuit board can move between the area where the clamping plates and the guide plate are located under the drive of the moving conveyor line.

[0009] Preferably, the upper fixture of the present utility model is arranged on the moving conveyor line in a liftable manner. Before the lower fixture clamps the circuit board, the upper fixture first lifts the circuit board to separate the circuit board from the conveyor belt of the moving conveyor line.

[0010] Preferably, the testing unit of the present utility model is arranged on the testing frame in a liftable manner, and the testing frame is provided with a guide rail that slidably cooperates with the testing unit.

[0011] Beneficial effects: An automatic flying probe tester provided by the present utility model has the following beneficial effects:

[0012] 1. The present utility model uses a moving conveyor line for feeding and discharging the circuit board, drives the circuit board to move forward by the friction force generated by the movement of the conveyor belt, and positions the circuit board through the positioning fixture, which is not affected by the arrangement of components on the circuit of the circuit board itself, thereby realizing fast transfer and reducing the equipment cost.

[0013] 2. In addition to setting the upper fixture and the lower fixture, the present utility model also sets a side fixture, which clamps and supports the middle part of the circuit board through the side fixture, can reduce the deformation of the circuit board, and is convenient for the subsequent testing work.

[0014] 3. The present utility model uses a guide plate to guide the movement of the circuit board, and sets the upper fixture in a liftable form, so that the tested circuit board is separated from the conveyor belt of the moving conveyor line, so that feeding and discharging can be carried out while detecting, shortening the waiting time of the process and improving the detection efficiency. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art.

[0016] Figure 1 It is the overall structure diagram of the tester of the present utility model;

[0017] Figure 2 It is the internal structure diagram of the tester of the present utility model;

[0018] Among them, 1 - testing frame, 2 - moving conveyor line, 3 - feeding part, 4 - detecting part, 5 - discharging part, 6 - testing unit, 7 - upper fixture, 8 - lower fixture, 9 - side fixture, 10 - guide plate, 11 - guide rail, 12 - in-place sensor. Detailed Embodiments

[0019] Reference will now be made in detail to the embodiments of the present disclosure, one or more examples of which are set forth below. Each embodiment and example is provided by way of explanation of the devices, components, and materials of the present disclosure, and not by way of limitation. On the contrary, the following description provides a convenient illustration for implementing the exemplary embodiments of the present disclosure. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the teachings of the present disclosure without departing from the scope or spirit of the present disclosure. For example, features shown or described as part of one embodiment can be combined with another embodiment to yield yet another embodiment. It is intended that the present disclosure cover such modifications and variations that fall within the scope of the appended claims and their equivalents. Other objects, features, and aspects of the present disclosure are disclosed or will be apparent from the following detailed description. It is to be understood by those of ordinary skill in the art that this discussion is only a description of exemplary embodiments and is not intended to limit the broader aspects of the present disclosure.

[0020] As Figure 1 and Figure 2 shown, the present utility model discloses an automatic flying probe tester, which includes a test frame 1. A moving conveyor line 2 for driving a circuit board in and out of the tester is arranged on the test frame 1. The moving conveyor line 2 includes a feeding part 3, a detection part 4, and a discharging part 5. A test unit 6 for detecting the circuit board conveyed into the detection part 4 is arranged in the detection part 4. The test unit 6 is arranged on the test frame in a liftable manner. The test frame 1 is provided with a guide rail 11 that slidably cooperates with the test unit 6. A positioning mechanism for positioning the circuit board in the detection part 4 is arranged along the conveying direction of the moving conveyor line 2. The positioning mechanism includes a in-place sensor 12 located at the end of the detection part 4 along the conveying direction, and positioning jigs arranged on both sides of the conveyor line corresponding to the area of the detection part 4.

[0021] It is judged whether the circuit board is conveyed in place by the in-place sensor 12, and then the upper and lower edges of the circuit board are clamped and fixed by the positioning jigs. In a specific embodiment, as Figure 2 shown, the positioning jigs of the present utility model are divided into an upper jig 7, a lower jig 8, and a side jig 9. Both the upper jig 7 and the lower jig 8 are provided with clamping plates for clamping on both sides of the circuit board. The side jig 9 is located in the middle of the circuit board in the height direction. After the circuit board is clamped and fixed by the upper jig 7 and the lower jig 8, the middle of the circuit board is clamped and supported by the side jig 9. By clamping the edge of the circuit board with the clamping plate, it can be reliably fixed, not affected by the arrangement of components on the circuit board. At the same time, the side jig 9 located in the middle of the circuit board in the height direction can clamp and support the middle of the circuit board, thereby reducing the deformation of the circuit board surface, so that when the probe is used for detection subsequently, the deviation of the moving distance of the probe is not too large, ensuring that all test points on the circuit board can be comprehensively and accurately detected and ensuring the detection efficiency.

[0022] Meanwhile, to reduce the waiting time of the circuit board loading and unloading process, the circuit board loading and unloading are carried out while the detection is in progress, so as to improve the detection efficiency. Specifically, along the conveying direction of the mobile conveyor line 2, guide plates 10 for guiding the movement of the circuit board are arranged at the upper and lower positions of the feeding part 3 and the discharging part 5. The guide plates 10 are symmetrically located on both sides of the mobile conveyor line; the guide plates 10 correspond to the clamping plates of the upper fixture or the lower fixture at the corresponding positions. In the state where the clamping plates are opened, the circuit board can move between the area where the clamping plates and the guide plates 10 are located under the drive of the mobile conveyor line 2, enter the detection part 4 from the feeding part 3, and move out of the detection part 4 to the discharging part 5; the upper fixture 7 is arranged on the mobile conveyor line 2 in a liftable manner. Before the lower fixture 8 clamps the circuit board, the upper fixture 7 first lifts the circuit board to separate the circuit board from the conveyor belt of the mobile conveyor line 2, so as to avoid the influence of feeding and discharging on the detection.

[0023] When the automatic flying probe tester provided by the present utility model is in use, the mobile conveyor line 2 is started, and the circuit board is brought into the feeding part 3 of the tester and moves towards the detection part 4 under its drive and the guiding action of the guide plate 10. After the in-place sensor 12 detects that the circuit board has moved in place, the mobile conveyor line first stops conveying, and then the upper fixture 7 clamps the circuit board and moves it up by 3-5 mm to separate the circuit board from the conveyor belt of the mobile conveyor line 2. Then the lower fixture 8 and the side plate fixture 9 clamp the circuit board, and the test unit 6 is used to test the circuit board; while the test is in progress, the mobile conveyor line 2 can continue to move, convey the next circuit board to be tested to the position adjacent to the detection part 4 at the feeding part, and then after the test is completed, move the circuit board in the detection part to the discharging part 5, and synchronously move the circuit board to be tested into the detection part 4 to start the next round of testing, ensuring the continuous progress of the entire testing process and improving the testing efficiency.

Claims

1. An automatic flying probe tester, characterized in that: The invention comprises a test frame (1), on which a movable conveyor line (2) for driving a circuit board into and out of a test machine is arranged, the movable conveyor line (2) comprising a feeding section (3), a detection section (4) and a discharging section (5), the detection section (4) being provided with a test unit (6) for detecting the circuit board conveyed into the test machine; a positioning mechanism for positioning the circuit board in the detection section (4) is arranged along the conveying direction of the movable conveyor line (2), the positioning mechanism comprising an in-position sensor (12) located at an end of the detection section (4) along the conveying direction, and positioning fixtures arranged on both sides of the conveyor line corresponding to the detection section (4) area.

2. The automatic flying probe tester according to claim 1, characterized in that: The positioning fixture is divided into an upper fixture (7), a lower fixture (8) and a side fixture (9); the upper fixture (7) and the lower fixture (8) are both configured to clamp the clamping plates on both sides of the circuit board; the side fixture (9) is located in the middle of the circuit board in the height direction; after the circuit board is clamped and fixed by the upper fixture (7) and the lower fixture (8), the middle of the circuit board is clamped and supported by the side fixture (9).

3. The automatic flying probe tester according to claim 2, characterized in that: Along the conveying direction of the movable conveyor line (2), guide plates (10) for guiding the movement of the circuit board are arranged at the upper and lower positions of the feeding part (3) and the discharging part (5), and the guide plates (10) are symmetrically located on both sides of the movable conveyor line.

4. The automatic flying probe tester according to claim 3, characterized in that: The guide plate (10) corresponds to the clamping plate of the upper clamp or the lower clamp at a corresponding position, and when the clamping plate is in an open state, the circuit board can be moved between the area where the clamping plate and the guide plate (10) are located under the drive of the moving conveyor line (2).

5. The automatic flying probe tester according to claim 4, characterized in that: The upper clamp (7) is movably arranged on the movable conveyor line (2); before the lower clamp (8) clamps the circuit board, the circuit board is first lifted up by the upper clamp (7) so that the circuit board is separated from the conveyor belt of the movable conveyor line (2).

6. The automatic flying probe tester according to claim 1, characterized in that: The test unit (6) is arranged on a test frame in a liftable manner, and the test frame (1) is provided with a guide rail (11) that is slidably matched with the test unit (6).

Images