Circuit board tolerance test equipment and test method

Abstract

The invention discloses circuit board tolerance test equipment and a test method. The circuit board tolerance test equipment comprises a workbench; the material storage box is arranged at one end of the working table, and the material storage box is suitable for storing workpieces; the test box is arranged at the other end of the workbench, two opening and closing mechanisms capable of moving close to each other or away from each other are arranged on the two sides of the top of the test box respectively, and the two opening and closing mechanisms are suitable for opening or closing the test box; a boss is arranged in the test box, a clamping mechanism is arranged in the boss and can elastically move in the vertical direction, and the two ends of the top of the clamping mechanism can rotate towards each other to be close to or away from each other.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit boards, and particularly relates to a circuit board tolerance testing device and a testing method. Background Art

[0002] The names of circuit boards include: ceramic circuit boards, alumina ceramic circuit boards, aluminum nitride ceramic circuit boards, printed circuit boards, PCB boards, aluminum substrates, high-frequency boards, thick copper boards, impedance boards, PCBs, ultra-thin circuit boards, ultra-thin circuit boards, printed (copper etching technology) circuit boards, etc.

[0003] When the existing circuit boards are subjected to tolerance testing, they need to be placed on a jig and then powered on for testing. However, the shapes of the jigs for each circuit board are different, resulting in the need to replace different jigs each time. And the existing jigs need to be disassembled with screws when being replaced, which makes the replacement inconvenient and affects the testing efficiency. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems in the related art to some extent. For this purpose, an object of the present invention is to provide a circuit board tolerance testing device, including:

[0005] A workbench;

[0006] A storage box, which is arranged at one end of the workbench and is adapted to store workpieces;

[0007] A test box, which is arranged at the other end of the workbench. Two opening and closing mechanisms that can move closer to or away from each other are respectively arranged on both sides of the top of the test box, and the two opening and closing mechanisms are adapted to open or close the test box;

[0008] A boss is arranged inside the test box, and a clamping mechanism is arranged inside the boss. The clamping mechanism can elastically move in the vertical direction, and the two ends of the top of the clamping mechanism can respectively rotate closer to or away from each other;

[0009] A detachable jig is also arranged on the boss. A positioning block corresponding to the clamping mechanism is arranged at the bottom of the jig. Positioning grooves are respectively arranged on both sides of the positioning block. When the jig is placed on the boss, the positioning block at the bottom of the jig is inserted into the clamping mechanism, and the jig presses the clamping mechanism through the positioning block, so that the clamping mechanism descends in the vertical direction, and the two ends of the clamping mechanism rotate towards the direction of the positioning block and jointly clamp the positioning block, so that the jig is fixed on the boss;

[0010] A feeding mechanism, which is arranged on the workbench, between the storage box and the test box, and the feeding mechanism can rotate, move or lift vertically on the workbench to be suitable for transporting the workpieces in the storage box into the test box or sending out the workpieces in the test box.

[0011] Preferably, sliding grooves are respectively arranged at both ends of the top of the test box, and the sliding grooves are arranged along the length direction of the test box.

[0012] Preferably, the opening and closing mechanism includes:

[0013] A slider, which is arranged in the sliding groove;

[0014] A box door, which is arranged on the slider;

[0015] A connecting piece, which is arranged on the side surface of the box door;

[0016] An air rod, which is arranged on the side surface of the test box, and the transmission end of the air rod is connected to the connecting piece.

[0017] Preferably, a plurality of spray heads are arranged on the box door, the plurality of spray heads are arranged at equal intervals, the bottoms of the plurality of spray heads are arranged in the test box, and the tops of the plurality of spray heads can be externally connected to pipelines.

[0018] Preferably, an installation groove is arranged in the boss, and the installation groove is arranged in a Y shape.

[0019] Preferably, the clamping mechanism includes:

[0020] A plurality of first springs, which are vertically arranged in the installation groove;

[0021] A movable block, which is slidably arranged in the installation groove and connected to the plurality of first springs, and a fixing groove corresponding to the positioning block is arranged in the middle of the movable block;

[0022] Two clamping blocks, which are respectively rotatably arranged on both sides of the top of the movable block, and the two clamps correspond to the positioning grooves.

[0023] Preferably, positioning columns are arranged at the corners of the boss, positioning holes are arranged at the corners of the jig, and the positioning columns correspond to the positioning holes.

[0024] Preferably, a plurality of fixing cylinders are further arranged on the boss, the plurality of fixing cylinders are arranged on the boss at equal intervals, a plurality of second springs and a plurality of probes are respectively arranged in the plurality of bosses, the plurality of second springs are vertically arranged in the plurality of fixing cylinders, and the plurality of springs are respectively vertically arranged in the plurality of fixing cylinders and connected to the plurality of second springs.

[0025] Preferably, the feeding mechanism includes:

[0026] An annular groove provided on the workbench;

[0027] A motor vertically provided in the middle of the annular groove;

[0028] A fixing plate horizontally provided on the transmission shaft of the motor;

[0029] Two sliding columns, one ends of the two sliding columns are respectively provided at both ends of the fixing plate, and the other ends of the two sliding columns are respectively slidably provided in the annular groove;

[0030] A telescopic cylinder vertically provided on the fixing plate;

[0031] A mounting plate provided on the telescopic cylinder;

[0032] A rodless cylinder provided at the bottom of the mounting plate and movable along the length direction of the mounting plate;

[0033] A clamping jaw vertically provided at the bottom of the rodless cylinder and connected to the transmission end of the rodless cylinder.

[0034] A testing method, the steps are as follows:

[0035] S1. Before the test, the staff first place the corresponding fixture on the convex platform. When placing the fixture, first insert the positioning block of the fixture into the fixing groove of the movable block, and then align the positioning hole of the fixture with the positioning post;

[0036] S2. Subsequently, the staff lower the fixture, and rely on the weight of the fixture itself to press the movable block, so that the movable block descends in the installation groove, and the movable block compresses a plurality of first springs. When the movable block descends, the two clamping blocks also rotate towards the direction of the positioning block at the same time, so that the two clamping blocks jointly clamp the positioning block;

[0037] S3. A through hole reserved on the fixture, and the through hole is convenient for the probe to pass through and conduct a power-on test with the circuit board on the fixture base;

[0038] S4. After placing the fixture, the staff place the circuit board to be tested in the storage box, and the rodless cylinder drives the clamping jaw to move above the storage box. Subsequently, the telescopic cylinder descends in the vertical direction, so that the clamping jaw can clamp the circuit board in the storage box. After clamping the circuit board, the telescopic cylinder rises and resets in the vertical direction;

[0039] S5. Next, the motor drives the fixed plate to rotate so that the clamping jaws move above the test chamber, and the telescopic cylinder descends vertically so that the clamping jaws can place the circuit board on the fixture, and then the telescopic cylinder rises vertically to reset.

[0040] S6. After placing the circuit board on the fixture, the pneumatic rods on both sides drive the chamber doors on both sides to move closer to each other and close the test chamber. Subsequently, the spray head starts to perform salt spray testing on the circuit board.

[0041] S7. After the testing is completed, the pneumatic rods on both sides drive the chamber doors on both sides to move away from each other to open the test chamber. Subsequently, the telescopic cylinder descends vertically so that the clamping jaws can pick up the tested circuit board, and then the motor drives the fixed plate to rotate and send out the circuit board.

[0042] The above solution of the present invention has at least the following beneficial effects:

[0043] First, align the positioning blocks at the bottom of the fixture with the clamping mechanism, and then rely on the weight of the fixture itself to exert pressure on the clamping mechanism, so that the clamping descends vertically, and both ends of the clamping mechanism rotate towards the positioning blocks at the same time and clamp the positioning blocks, so that the fixture is quickly installed.

[0044] Subsequently, the feeding mechanism picks up the circuit board in the storage box and places it on the fixture. Then, the opening and closing mechanisms on both sides of the top of the test chamber move closer to each other to close the test chamber. After the testing is completed, the opening and closing mechanisms on both sides of the top of the test chamber move away from each other to open the test chamber, and the feeding mechanism picks up and sends out the tested circuit board from the test chamber.

[0045] If the staff needs to replace the fixture, they can lift both sides of the fixture with both hands at the same time, so that the fixture gradually moves away from the clamping mechanism. At the same time, the clamping mechanism rises elastically, and both ends of the top of the clamping mechanism gradually move away from the positioning blocks, so that the fixture can be completely detached from the clamping mechanism; the fixture can be quickly installed or disassembled through the clamping mechanism.

[0046] The additional aspects and advantages of the present invention will be partially given in the following description, partially will become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0048] Figure 1It is a schematic structural diagram of a circuit board tolerance testing device provided in an embodiment of the present invention;

[0049] Figure 2 is Figure 1 A-A sectional structural diagram of;

[0050] Figure 3 is Figure 1 An enlarged view of part B of;

[0051] Figure 4 is Figure 1 A-C sectional structural diagram of;

[0052] Figure 5 is Figure 4 An enlarged view of part D of;

[0053] Figure 6 is Figure 1 An enlarged view of part E of.

[0054] Explanation of reference numerals in the drawings:

[0055] 1, workbench, 2, storage box, 3, test box, 4, opening and closing mechanism, 5, convex platform, 6, clamping mechanism, 7, fixture, 8, positioning block, 9, positioning groove, 10, feeding mechanism;

[0056] 301, chute;

[0057] 401, slider, 402, box door, 403, connecting piece, 404, air rod, 405, spray head;

[0058] 501, installation groove, 502, positioning column, 503, fixing cylinder, 504, second spring, 505, probe;

[0059] 601, first spring, 602, movable block, 603, clamping block;

[0060] 1001, annular groove, 1002, motor, 1003, fixing plate, 1004, sliding column, 1005, telescopic cylinder, 1006, mounting plate, 1007, rodless cylinder, 1008, clamping jaw.

[0061] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0062] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0064] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0065] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0067] The circuit board tolerance testing device according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0068] Please refer to Figures 1 to 6 , in this embodiment, it includes: a workbench 1; a storage box 2, the storage box 2 is arranged at one end of the workbench 1, and the storage box 2 is adapted to store workpieces; a test box 3, the test box 3 is arranged at the other end of the workbench 1, and two opening and closing mechanisms 4 that can move closer to or away from each other are respectively arranged on both sides of the top of the test box 3, and the two opening and closing mechanisms 4 are adapted to open or close the test box 3; a boss 5 is arranged in the test box 3, a clamping mechanism 6 is arranged in the boss 5, the clamping mechanism 6 can elastically move in the vertical direction, and the two ends of the top of the clamping mechanism 6 can rotate closer to or away from each other; a detachable fixture 7 is also arranged on the boss 5, a positioning block 8 corresponding to the clamping mechanism 6 is arranged at the bottom of the fixture 7, positioning grooves 9 are respectively arranged on both sides of the positioning block 8, when the fixture 7 is placed on the boss 5, the positioning block 8 at the bottom of the fixture 7 is inserted into the clamping mechanism 6, and the fixture 7 presses the clamping mechanism 6 through the positioning block 8, so that the clamping mechanism 6 descends in the vertical direction, so that the two ends of the clamping mechanism 6 rotate towards the direction of the positioning block 8 and jointly clamp the positioning block 8, so that the fixture 7 is fixed on the boss 5; a feeding mechanism 10, the feeding mechanism 10 is arranged on the workbench 1 and is arranged between the storage box 2 and the test box, and the feeding mechanism 10 can rotate or move or lift in the vertical direction on the workbench 1, so as to be adapted to transport the workpieces in the storage box 2 into the test box 3 or send out the workpieces in the test box 3;

[0069] First, align the positioning block 8 at the bottom of the fixture 7 with the clamping mechanism 6, and then rely on the self-weight of the fixture 7 to press the clamping mechanism 6, so that the clamping descends in the vertical direction, and the two ends of the clamping mechanism 6 rotate towards the direction of the positioning block 8 and clamp the positioning block 8 at the same time, so that the fixture 7 is quickly installed;

[0070] Subsequently, the feeding mechanism 10 clamps the circuit board in the storage box 2 and places it on the jig 7. Subsequently, the opening and closing mechanisms 4 on both sides of the top of the test box 3 move towards each other and close the test box 3. After the test is completed, the opening and closing mechanisms 4 on both sides of the top of the test box 3 move away from each other and open the test box 3, while the feeding mechanism 10 clamps and sends out the tested circuit board from the test box 3;

[0071] If the staff needs to replace the jig 7, they can lift both sides of the jig 7 with both hands at the same time, so that the jig 7 gradually moves away from the clamping mechanism 6. At the same time, the clamping mechanism 6 rises elastically, and the two ends of the top of the clamping mechanism 6 gradually move away from the positioning block 8, so that the jig 7 can be completely separated from the clamping mechanism 6; the clamping mechanism 6 can quickly complete the installation or disassembly of the jig 7.

[0072] In this embodiment, sliding grooves 301 are respectively provided at both ends of the top of the test box 3, and the sliding grooves 301 are arranged along the length direction of the test box 3; the opening and closing mechanism 4 includes: a slider 401, the slider 401 is arranged in the sliding groove 301; a box door 402, the box door 402 is arranged on the slider 401; a connecting member 403, the connecting member 403 is arranged on the side of the box door 402; an air rod 404, the air rod 404 is arranged on the side of the test box 3, and the transmission end of the air rod 404 is connected to the connecting member 403; a plurality of spray heads 405 are provided on the box door 402, the plurality of spray heads 405 are arranged at equal intervals, and the bottoms of the plurality of spray heads 405 are arranged inside the test box 3, and the tops of the plurality of spray heads 405 can be externally connected to a pipeline; after the feeding mechanism 10 places the circuit board on the jig 7, the air rods 404 on both sides drive the box doors 402 on both sides to move towards each other and close the test box 3, and then the spray heads 405 start to perform salt spray testing on the circuit board; after the test is completed, the air rods 404 on both sides drive the box doors 402 on both sides to move away from each other to open the test box 3, so as to facilitate the feeding mechanism 10 to clamp the circuit board on the jig 7.

[0073] In this embodiment, an installation groove 501 is provided in the boss 5, and the installation groove 501 is arranged in a Y shape; the clamping mechanism 6 includes: a plurality of first springs 601, the plurality of first springs 601 are vertically arranged in the installation groove 501; a movable block 602, the movable block 602 is slidably arranged in the installation groove 501 and is connected to the plurality of first springs 601, and a fixing groove corresponding to the positioning block 8 is provided in the middle of the movable block 602; two clamping blocks 603, the two clamps are respectively rotatably arranged on both sides of the top of the movable block 602, and the two clamps correspond to the positioning groove 9;

[0074] When placing the fixture 7, first insert the positioning block 8 of the fixture 7 into the fixing groove of the movable block 602. Then, the operator places the fixture 7 downwards, and the weight of the fixture 7 itself presses on the movable block 602, causing the movable block 602 to descend within the installation groove 501. The movable block 602 compresses a plurality of first springs 601. When the movable block 602 descends, the two clamping blocks 603 also rotate towards the positioning block 8 simultaneously, so that the two clamping blocks 603 jointly clamp the positioning block 8, thus completing the rapid installation of the fixture 7. When it is necessary to disassemble the fixture 7, the operator can lift both sides of the fixture 7 with both hands at the same time. Since the fixing groove is provided with a movable cavity, the fixture 7 can be lifted. Meanwhile, the compressed first springs 601 jack up the movable block 602 through elastic potential energy, so that the two clamping blocks 603 at the top of the movable block 602 gradually rotate away from the positioning block 8 in different directions, enabling the fixture 7 to be quickly disassembled.

[0075] In this embodiment, positioning posts 502 are provided at the corners of the convex platform 5, and positioning holes are provided at the corners of the fixture 7. The positioning posts 502 correspond to the positioning holes. The positioning posts 502 can assist the clamping mechanism 6, thereby facilitating the installation of the fixture 7 and preventing the fixture 7 from shifting during use.

[0076] In this embodiment, a plurality of fixing cylinders 503 are further provided on the convex platform 5. The plurality of fixing cylinders 503 are arranged on the convex platform 5 at equal intervals. A plurality of second springs 504 and a plurality of probes 505 are respectively provided in the plurality of convex platforms 5. The plurality of second springs 504 are vertically arranged in the plurality of fixing cylinders 503. A plurality of springs are respectively vertically arranged in the plurality of fixing cylinders 503 and are connected to the plurality of second springs 504. The fixture 7 can be provided with through holes corresponding to the probes 505. When the fixture 7 is completely pressed on the plurality of probes 505, a part of the probes 505 are compressed, and the probes 505 corresponding to the through holes pass through the through holes and abut against the circuit board.

[0077] In this embodiment, the feeding mechanism 10 includes: an annular groove 1001 provided on the workbench 1; a motor 1002 vertically provided in the middle of the annular groove 1001; a fixing plate 1003 horizontally provided on the transmission shaft of the motor 1002; two sliding columns 1004, one ends of the two sliding columns 1004 are respectively provided at both ends of the fixing plate 1003, and the other ends of the two sliding columns 1004 are respectively slidably provided in the annular groove 1001; a telescopic cylinder 1005 vertically provided on the fixing plate 1003; a mounting plate 1006 provided on the telescopic cylinder 1005; a rodless cylinder 1007 provided at the bottom of the mounting plate 1006 and movable along the length direction of the mounting plate 1006; a jaw 1008 vertically provided at the bottom of the rodless cylinder 1007 and connected to the transmission end of the rodless cylinder 1007; The staff places the circuit board to be tested in the storage box 2, and the rodless cylinder 1007 drives the jaw 1008 to move above the storage box 2. Subsequently, the telescopic cylinder 1005 descends vertically so that the jaw 1008 can pick up the circuit board in the storage box 2. After picking up the circuit board, the telescopic cylinder 1005 rises vertically to reset. The motor 1002 drives the fixing plate 1003 to rotate so that the jaw 1008 moves above the test box 3, and the telescopic cylinder 1005 descends vertically so that the jaw 1008 can place the circuit board on the fixture 7, and then the telescopic cylinder 1005 rises vertically to reset; After the test is completed, the telescopic cylinder 1005 descends vertically so that the jaw 1008 can pick up the tested circuit board, and then the motor 1002 drives the fixing plate 1003 to rotate and sends out the circuit board.

[0078] A test method comprises the following steps:

[0079] S1. Before the test, the staff first places the corresponding fixture 7 on the boss 5. When placing the fixture 7, first insert the positioning block 8 of the fixture 7 into the fixing groove of the movable block 602, and then align the positioning hole of the fixture 7 with the positioning post 502;

[0080] S2. Subsequently, the staff puts down the fixture 7, and relies on the weight of the fixture 7 itself to press the movable block 602, so that the movable block 602 descends in the installation groove 501, and the movable block 602 compresses a plurality of first springs 601. When the movable block 602 descends, the two clamping blocks 603 also rotate towards the direction of the positioning block 8 at the same time, so that the two clamping blocks 603 jointly clamp the positioning block 8;

[0081] S3. A through hole is reserved on the fixture 7 for the probe 505 to pass through and conduct an electrical test with the circuit board on the fixture base.

[0082] After the jig 7 is placed properly, the staff places the circuit board to be tested in the storage box 2. Then, the rodless cylinder 1007 drives the gripper 1008 to move above the storage box 2. Subsequently, the telescopic cylinder 1005 descends vertically so that the gripper 1008 can pick up the circuit board in the storage box 2. After picking up the circuit board, the telescopic cylinder 1005 ascends vertically to reset.

[0083] S5. Next, the motor 1002 drives the fixed plate 1003 to rotate so that the gripper 1008 moves above the test box 3. Then, the telescopic cylinder 1005 descends vertically so that the gripper 1008 can place the circuit board on the jig 7. Then, the telescopic cylinder 1005 ascends vertically to reset.

[0084] S6. After the circuit board is placed on the jig 7, the air rods 404 on both sides drive the box doors 402 on both sides to move closer to each other and close the test box 3. Subsequently, the spray head 405 starts to perform a salt spray test on the circuit board.

[0085] S7. After the test is completed, the air rods 404 on both sides drive the box doors 402 on both sides to move away from each other to open the test box 3. Subsequently, the telescopic cylinder 1005 descends vertically so that the gripper 1008 can pick up the tested circuit board. Then, the motor 1002 drives the fixed plate 1003 to rotate and sends out the circuit board.

[0086] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0087] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. Circuit board tolerance test equipment, characterized in that, include: Workbench; A material storage box, which is arranged at one end of the workbench and is suitable for storing workpieces; A test box, the test box is arranged at the other end of the workbench, and two opening and closing mechanisms are respectively arranged on both sides of the top of the test box, which can move closer to or away from each other, and the two opening and closing mechanisms are suitable for opening or closing the test box; A boss is provided in the test box, and a clamping mechanism is provided in the boss. The clamping mechanism can be elastically movable in a vertical direction, and the top two ends of the clamping mechanism can be rotated toward or away from each other respectively; The boss is also provided with a detachable jig, the bottom of the jig is provided with a positioning block corresponding to the clamping mechanism, and both sides of the positioning block are provided with positioning grooves, when the jig is placed on the boss, the positioning block at the bottom of the jig is inserted into the clamping mechanism, and the jig applies pressure to the clamping mechanism through the positioning block, so that the clamping mechanism descends in the vertical direction, so that the two ends of the clamping mechanism rotate toward the direction of the positioning block, and clamp the positioning block together, so that the jig is fixed on the boss; A feeding mechanism is disposed on the workbench and between the material storage box and the test box, and the feeding mechanism can rotate or move on the workbench or can be raised and lowered in the vertical direction to be suitable for transporting the workpiece in the material storage box to the test box or sending the workpiece in the test box out.

2. The circuit board tolerance testing device according to claim 1, characterized in that: Both ends of the top of the test box are respectively provided with slide grooves, and the slide grooves are arranged along the length direction of the test box.

3. The circuit board tolerance testing device according to claim 2, characterized in that: The opening and closing mechanism comprises: A slider, the slider being arranged in the slide groove; A box door, the box door is arranged on the slider; A connecting piece, the connecting piece is arranged on a side of the box door; A gas rod is arranged on the side of the test box, and a transmission end of the gas rod is connected to the connecting piece.

4. The circuit board tolerance testing device according to claim 3, characterized in that: A plurality of spray heads are arranged on the box door, the plurality of spray heads are arranged at equal intervals, the bottoms of the plurality of spray heads are arranged in the test box, and the tops of the plurality of spray heads can be connected to external pipelines.

5. The circuit board tolerance testing device according to claim 1, characterized in that: A mounting groove is arranged in the boss, and the mounting groove is arranged in a Y shape.

6. The circuit board tolerance testing device according to claim 5, characterized in that: The clamping mechanism comprises: A plurality of first springs, wherein the plurality of first springs are vertically arranged in the mounting groove; A movable block, which is slidably disposed in the mounting groove and connected to the plurality of first springs, and a fixing groove corresponding to the positioning block is disposed in the middle of the movable block; Two clamping blocks, the two clamping blocks are rotatably arranged on both sides of the top of the movable block, and the two clamping blocks correspond to the positioning grooves.

7. The circuit board tolerance testing device according to claim 5, characterized in that: Positioning posts are provided at the corners of the boss, and positioning holes are provided at the corners of the fixture, and the positioning posts correspond to the positioning holes.

8. The circuit board tolerance testing device according to claim 1, characterized in that: The boss is also provided with a plurality of fixed cylinders, which are arranged on the boss at equal intervals. The bosses are also respectively provided with a plurality of second springs and a plurality of probes, the plurality of second springs are vertically arranged in the plurality of fixed cylinders, the plurality of springs are respectively vertically arranged in the plurality of fixed cylinders, and are connected to the plurality of second springs.

9. The circuit board tolerance testing device according to claim 1, characterized in that: The feeding mechanism comprises: an annular groove, the annular groove is arranged on the workbench; A motor, wherein the motor is vertically arranged in the middle of the annular groove; A fixing plate, the fixing plate being horizontally arranged on the transmission shaft of the motor; Two sliding columns, one end of each of the two sliding columns is respectively disposed at two ends of the fixed plate, and the other ends of each of the two sliding columns are respectively slidably disposed in the annular groove; A telescopic cylinder, the telescopic cylinder is vertically arranged on the fixed plate; A mounting plate, the mounting plate being arranged on the telescopic cylinder; A rodless cylinder, which is disposed at the bottom of the mounting plate and is movable along the length direction of the mounting plate; A clamping jaw is vertically arranged at the bottom of the rodless cylinder and connected to the transmission end of the rodless cylinder.

10. A testing method, applied to the circuit board tolerance testing device according to any one of claims 1 to 9, characterized in that: Here are the steps: S1. Before testing, the staff will place the corresponding fixture on the boss. When placing the fixture, first insert the positioning block of the fixture into the fixed groove of the movable block, and then align the positioning hole of the fixture with the positioning column; S2. The staff then puts down the jig and applies pressure to the movable block by the weight of the jig itself, so that the movable block descends in the installation groove, and the movable block compresses the plurality of first springs. When the movable block descends, the two clamping blocks also rotate toward the direction of the positioning block at the same time, so that the two clamping blocks clamp the positioning block together; S3. A through hole is reserved on the fixture, which allows the probe to pass through and conduct a power-on test with the circuit board on the fixture seat; S4. After placing the fixture, the staff puts the circuit board to be tested in the storage box, and the rodless cylinder drives the clamping claw to move to the top of the storage box, and then the telescopic cylinder descends in the vertical direction so that the clamping claw can clamp the circuit board in the storage box. After clamping the circuit board, the telescopic cylinder rises in the vertical direction and resets; S5. Then, the motor drives the fixed plate to rotate so that the clamp moves to the top of the test box, and the telescopic cylinder descends in the vertical direction so that the clamp can move the circuit board onto the fixture, and then the telescopic cylinder rises in the vertical direction to reset; S6. After placing the circuit board on the fixture, the gas rods on both sides drive the box doors on both sides to move closer to each other and close the test box. Then the sprinkler head starts to spray salt spray test on the circuit board; S7. After the test is completed, the gas rods on both sides drive the box doors on both sides to move away from each other to open the test box. Then the telescopic cylinder descends in the vertical direction so that the clamp can clamp the circuit board after the test. Then the motor drives the fixed plate to rotate and send the circuit board out.

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