A detection device for SMT soldering quality

Abstract

The application belongs to the technical field of welding detection, in particular to a detection equipment for SMT welding quality, which comprises a base, the top surface of the base is fixedly connected with a placing plate, a fixed block is arranged on the base, a first sliding groove is arranged on the side of the fixed block close to the placing plate, a group of clamping plates are slidably connected in the first sliding groove, and a rotating assembly is arranged on the base to rotate the fixed block; a plurality of SMT-welded elements are placed on the placing plate, then the push rod is controlled to move, the push rod pushes the clamping plates, the clamping plates clamp the elements on the placing plate, then the motor is controlled to drive the screw to rotate, the screw drives the sliding block to move, at this time, the camera on the sliding block can take a picture of one of the elements for detection, after the detection is completed, the clamping plates are turned over, the camera continues to detect the other side of the element, so as to achieve the effect of detecting a plurality of elements at the same time.

Description

Technical Field

[0001] This invention belongs to the field of welding inspection technology, specifically a testing device for SMT welding quality. Background Technology

[0002] SMT, or Surface Mount Technology, is a mainstream assembly process in electronic manufacturing. First, solder paste is printed on the PCB pads, then miniature components are mounted. After the solder paste is melted by heating in a reflow oven and cooled, the electrical and mechanical connection between the components and the circuit board is completed. It is suitable for the miniaturization and high-density production needs of electronic products.

[0003] The welding process is prone to defects such as cold solder joints, bridging, insufficient solder, and voids. Even tiny solder joint defects can cause circuit breaks and short circuits, significantly reducing product reliability. Using a camera to take pictures and compare them can quickly and accurately identify various welding defects such as cold solder joints, insufficient materials, misalignment, and short circuits, strictly control the quality of products leaving the factory, and reduce after-sales failures and rework losses.

[0004] Currently, the components assembled in SMT processes are generally small in size and have fine solder joints. In order to fully determine the soldering quality, the equipment needs to simultaneously acquire images of the front and back of the components to complete a comprehensive inspection. This requires flipping the components, which is slow for flipping a single workpiece at a time and cannot achieve simultaneous flipping of multiple workpieces. This method significantly increases the inspection cycle of a single batch, limits the number of products that the equipment can inspect per unit time, and results in a low overall production line inspection throughput. It is difficult to match the continuous processing rhythm of high-speed SMT production lines, and there is a significant efficiency bottleneck. This invention provides an inspection device for SMT soldering quality. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: An inspection device for SMT soldering quality, comprising a base, a placement plate fixedly connected to the top surface of the base; a fixing block provided on the base, a first sliding groove provided on the side of the fixing block near the placement plate, a set of clamping plates slidably connected within the first sliding groove, a rotating assembly for rotating the fixing block provided on the base; a push rod fixedly connected to the side of the clamping plates away from each other, a moving assembly for driving the push rod to move provided on the base; a support plate fixedly connected to the base, a connecting block fixedly connected to the end of the support plate away from the base, a second sliding groove provided on the bottom surface of the connecting block, a lead screw rotatably connected to the inner wall of the second sliding groove; a slider threadedly connected to the surface of the lead screw, a camera fixedly connected to the bottom surface of the slider, and a control motor for driving the lead screw to rotate fixedly connected to the side of the connecting block away from the fixing block.

[0007] Preferably, the rotating assembly includes a fixed rod fixed on the base, the top end of the fixed rod is open, a movable rod is slidably connected to the inner wall of the fixed rod, a drive motor is fixedly installed at the top end of the movable rod, the output end of the drive motor is fixedly connected to the fixed block, and the moving assembly is also used to control the movement of the movable rod.

[0008] Preferably, the movable component includes a first cavity formed within the connecting block, a push plate slidably connected to the inner wall of the first cavity, a round rod fixedly connected to the side of the push plate near the second slide groove, the round rod extending into the second slide groove, a first spring fixedly connected between the side of the push plate away from the round rod and the inner wall of the first cavity, a first conduit communicating between the first cavity and the interior of the fixed rod, a first control valve being provided on the first conduit, and a second spring fixedly connected between the bottom surface of the movable rod and the inner wall of the fixed rod.

[0009] Preferably, the moving component further includes connecting rods fixed on both sides of the fixing block, with openings on the sides of the connecting rods that are close to each other, the push rod being slidably and sealed to the inner wall of the connecting rod, a third spring being fixedly connected between the end of the push rod away from the clamp and the inner wall of the connecting rod, a first control valve being provided on the first conduit, and a second conduit communicating between the interior of the fixing rod connecting rod and the first cavity, with a second control valve being provided on the second conduit.

[0010] Preferably, a mounting plate is fixedly connected to the side of the slider near the control motor, a rectangular block is fixedly connected to the bottom surface of the mounting plate, and brush bristles are fixedly connected to the bottom surface of the rectangular block.

[0011] Preferably, the rectangular block has a second cavity, the bottom surface of the rectangular block has a set of air outlets, and the connecting block is provided with an air injection component for injecting air into the air outlets.

[0012] Preferably, the gas injection assembly includes a third cavity formed within the connecting block, a magnetic block slidably connected within the third cavity, the magnetic block being magnetically attracted to the slider, a pair of symmetrically arranged connecting pipes communicating within the third cavity, the end of the connecting pipe furthest from the third cavity communicating with a second cavity, and a solenoid valve being provided on the connecting pipe.

[0013] Preferably, the rectangular block has a hollow groove inside, the bottom surface of the rectangular block has a liquid outlet hole communicating with the hollow groove, and the hollow groove is connected to a liquid inlet pipe.

[0014] Preferably, a sealing sheet is fixedly connected inside the liquid outlet hole. The sealing sheet is made of an elastic material and has multiple sets of micropores.

[0015] Preferably, an electromagnet is fixedly connected to the top surface of the inner wall of the hollow groove, a pressure plate is slidably connected to the inner wall of the hollow groove, a fourth spring is fixedly connected between the pressure plate and the top surface of the inner wall of the hollow groove, and the pressure plate and the electromagnet are magnetically attracted to each other.

[0016] The beneficial effects of this invention are as follows: 1. This invention places several SMT-soldered components onto a placement board, then controls a push rod to move, causing the push rod to push a clamping plate, which clamps the components on the placement board. Subsequently, a motor drives a lead screw to rotate, causing the lead screw to move a slider. At this time, a camera on the slider will take pictures and detect one side of the component. After the detection is completed, the clamping plate is flipped so that the camera can continue to detect the other side of the component, thus achieving the effect of simultaneously detecting multiple components.

[0017] 2. When the moving rod moves upward, it will drive the clamping plate to move upward. After the component comes into contact with the brush bristles, one end of the moving rod can be stopped. Then, when the camera moves, the brush bristles will first brush away and clean the impurities on the component, avoiding misjudgment of poor welding quality due to impurities captured by the camera. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the detection device in this invention; Figure 2 yes Figure 1 A structural diagram from another perspective; Figure 3 This is a schematic diagram of the internal structure of the fixing rod and fixing block in this invention; Figure 4 This is a schematic diagram of the internal structure of the connecting block in this invention; Figure 5 This is a schematic diagram of the internal structure of the rectangular block in this invention.

[0020] In the diagram: 1. Base; 2. Placement plate; 3. Fixing block; 4. Clamping plate; 5. First slide groove; 6. Drive motor; 7. Push rod; 8. Fixing rod; 9. Moving rod; 10. Connecting block; 11. Second slide groove; 12. Slider; 13. Lead screw; 14. First cavity; 15. First guide tube; 16. Push plate; 17. Round rod; 18. Second guide tube; 19. Connecting rod; 20. Camera; 21. Rectangular block; 22. Brush bristles; 23. Second cavity; 24. Air outlet; 25. Third cavity; 26. Magnetic block; 27. Connecting pipe; 28. Hollow groove; 29. ​​Electromagnet; 30. Liquid inlet pipe; 31. Liquid outlet; 32. Sealing plate; 33. Pressure plate. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example 1: As Figures 1 to 4 As shown in the figure, an inspection device for SMT soldering quality according to an embodiment of the present invention includes a base 1, a placement plate 2 fixedly connected to the top surface of the base 1; a fixing block 3 is provided on the base 1, a first sliding groove 5 is formed on the side of the fixing block 3 near the placement plate 2, a set of clamping plates 4 are slidably connected in the first sliding groove 5, a rotating assembly for rotating the fixing block 3 is provided on the base 1; a push rod 7 is fixedly connected to the side of the clamping plates 4 away from each other, a moving assembly for driving the push rod 7 to move is provided on the base 1; a support plate is fixedly connected to the base 1, a connecting block 10 is fixedly connected to the end of the support plate away from the base 1, a second sliding groove 11 is formed on the bottom surface of the connecting block 10, a lead screw 13 is rotatably connected to the inner wall of the second sliding groove 11; a slider 12 is threadedly connected to the surface of the lead screw 13, a camera 20 is fixedly connected to the bottom surface of the slider 12, and a control motor for driving the lead screw 13 to rotate is fixedly connected to the side of the connecting block 10 away from the fixing block 3. Several SMT-soldered components are placed on the placement board 2. Then, the push rod 7 is moved by the moving component. The push rod 7 pushes the clamping plate 4, which clamps the components on the placement board 2. Then, the motor drives the lead screw 13 to rotate, which in turn moves the slider 12. The camera 20 on the slider 12 takes pictures of the components to detect the soldering quality. After one side of the component is inspected, the fixed block 3 is rotated by the rotating component to turn the component to the other side. Then, the motor drives the lead screw 13 to reverse, which resets the slider 12. The camera 20 can then take pictures of the other side of the component, which greatly improves the efficiency of SMT soldering quality inspection. After the inspection is completed, the clamping plate 4 is released from the component, and the component can be removed from the placement board 2.

[0023] The rotating assembly includes a fixed rod 8 fixed on the base 1. The top end of the fixed rod 8 is open. A movable rod 9 is slidably connected to the inner wall of the fixed rod 8. A drive motor 6 is fixedly installed at the top end of the movable rod 9. The output end of the drive motor 6 is fixedly connected to the fixed block 3. The moving assembly is also used to control the movement of the movable rod 9. After the clamping plate 4 completes the clamping of the component, the moving assembly controls the movable rod 9 to rise so that the component is closer to the camera 20. At this time, the camera 20 can take a clearer picture of the component. After the component is photographed and inspected on one side, the drive motor 6 controls the fixed block 3 to rotate 180 degrees so that the component clamped by the clamping plate 4 changes sides. Then, the camera 20 continues to photograph and inspect the other side of the component.

[0024] The movable component includes a first cavity 14 formed within the connecting block 10. A push plate 16 is slidably connected to the inner wall of the first cavity 14. A round rod 17 is fixedly connected to the side of the push plate 16 near the second slide groove 11. The round rod 17 extends into the second slide groove 11. A first spring is fixedly connected between the side of the push plate 16 away from the round rod 17 and the inner wall of the first cavity 14. A first conduit 15 communicates between the first cavity 14 and the interior of the fixed rod 8. A first control valve is provided on the first conduit 15. A second spring is fixedly connected between the bottom surface of the movable rod 9 and the inner wall of the fixed rod 8. When the moving rod 9 needs to move upward, the lead screw 13 can control the slider 12 to move closer to the first cavity 14. At this time, the slider 12 will push the round rod 17, which will push the push plate 16. The push plate 16 will push the gas in the first cavity 14, and the first conduit 15 will enter the fixed rod 8 to push the moving rod 9. After the moving rod 9 moves to the appropriate position, the first control valve is closed. At this time, the first cavity 14 is in a sealed state, and the moving rod 9 will no longer move. Then the slider 12 can move normally. When the moving rod 9 needs to move downward, the first control valve is opened. At this time, the second spring will pull the moving rod 9 to reset, and the first spring will push the push plate 16.

[0025] The moving component also includes connecting rods 19 fixed on both sides of the fixing block 3. The connecting rods 19 have openings on the side closer to each other. The push rod 7 is slidably connected to the inner wall of the connecting rod 19. A third spring is fixedly connected between the end of the push rod 7 away from the clamping plate 4 and the inner wall of the connecting rod 19. A first control valve is provided on the first conduit 15. A second conduit 18 is connected between the inside of the fixing rod 8 and the connecting rod 19 and the first cavity 14. A second control valve is provided on the second conduit 18. When clamping components using the clamping plate 4 is required, the first control valve can be closed and the second control valve opened. Then, the lead screw 13 controls the slider 12 to move closer to the first cavity 14, allowing the push plate 16 to push the gas in the first cavity 14 through the second conduit 18 into the connecting rod 19 to push the push rod 7. This push rod 7 then pushes the clamping plate 4 to clamp the component. After clamping the component, the push plate 16 continues to push the gas in the first cavity 14. At this time, the second control valve is closed and the first control valve is open. The gas then enters the connecting rod 19 through the first conduit 15, pushing the moving rod 9 to move. After the moving rod 9 moves to the appropriate position, the first control valve is closed. When both the first and second control valves are closed, the first cavity 14 is in a sealed state. At this time, neither the moving rod 9 nor the push rod 7 will move. When the second control valve is opened, the second spring pulls the push rod 7 to reset. When the first control valve is opened, the second spring pulls the moving rod 9 to reset.

[0026] A mounting plate is fixedly connected to the side of the slider 12 near the control motor. A rectangular block 21 is fixedly connected to the bottom surface of the mounting plate, and a brush bristle 22 is fixedly connected to the bottom surface of the rectangular block 21. When the moving rod 9 moves upward, it will drive the clamping plate 4 to move upward. After the component comes into contact with the brush bristle 22, one end of the moving rod 9 can be stopped. Then, when the camera 20 moves, the brush bristle 22 will first brush away the impurities on the component to avoid misjudging the poor welding quality due to the impurities captured by the camera 20.

[0027] The rectangular block 21 has a second cavity 23, and the bottom surface of the rectangular block 21 has a set of air outlets 24. The connecting block 10 is provided with an air injection component for injecting air into the air outlets 24. When the slider 12 moves, the air injection component can be used to inject air into the second cavity 23. At this time, the gas can be sprayed out from the air outlets 24, so that the gas is sprayed onto the component to improve the cleaning effect of the component.

[0028] The gas injection assembly includes a third cavity 25 formed within the connecting block 10. A magnetic block 26 is slidably connected within the third cavity 25, and the magnetic block 26 is magnetically attracted to the slider 12. A pair of symmetrically arranged connecting pipes 27 are connected within the third cavity 25. The end of the connecting pipe 27 away from the third cavity 25 is connected to a second cavity 23. A solenoid valve is provided on the connecting pipe 27. When it is necessary to inject gas into the second cavity 23, the slider 12 is moved. At this time, the slider 12 will drive the magnetic block 26 to move. When the magnetic block 26 moves to one side, the solenoid valve on the connecting pipe 27 on that side is opened. At this time, the magnetic block 26 will push the gas in the second cavity 23, so that the gas in the second cavity 23 can enter the second cavity 23 from the connecting pipe 27.

[0029] Example 2: Figure 5 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a hollow groove 28 is provided in the rectangular block 21, and a liquid outlet 31 communicating with the hollow groove 28 is provided on the bottom surface of the rectangular block 21. A liquid inlet pipe 30 is connected in the hollow groove 28. This application will test multiple components at the same time. If a product with unqualified welding quality is found, a liquid with a mark can be injected from the liquid inlet pipe 30 into the hollow groove 28, and then discharged from the liquid outlet 31 onto the component to mark the component with unqualified welding quality for subsequent processing.

[0030] A sealing sheet 32 ​​is fixedly connected inside the liquid outlet 31. The sealing sheet 32 ​​is made of elastic material and has multiple sets of micropores. Under normal conditions, the micropores will close due to the elasticity of the sealing sheet 32. At this time, the marking liquid can be injected into the hollow tank 28 from the liquid inlet pipe 30, so that the marking liquid can be stored in the hollow tank 28 for subsequent use.

[0031] An electromagnet 29 is fixedly connected to the top surface of the inner wall of the hollow groove 28, and a pressure plate 33 is slidably connected to the inner wall of the hollow groove 28. A fourth spring is fixedly connected between the pressure plate 33 and the top surface of the inner wall of the hollow groove 28, and the pressure plate 33 and the electromagnet 29 are magnetically attracted to each other. When the camera 20 detects a problem with the welding quality of the component, the electromagnet 29 will be turned off. At this time, the fourth spring will push the pressure plate 33, causing the pressure plate 33 to push the liquid in the hollow groove 28, so that the liquid opens the micropores on the sealing sheet 32, thereby allowing the liquid to be sprayed onto the component for marking.

[0032] Working principle: Several SMT-soldered components are placed on the placement board 2. Then, the push rod 7 is moved by the moving assembly. The push rod 7 pushes the clamping plate 4, causing it to hold the components on the placement board 2. The motor then drives the lead screw 13 to rotate, causing the lead screw 13 to move the slider 12. The camera 20 on the slider 12 captures images of the components to check their soldering quality. After one side of the component is inspected, the rotating assembly controls the fixed block 3 to rotate, allowing the component to be rotated. Then, the motor drives the lead screw 13 to reverse, causing the slider 12 to reset and move. Camera 20 can capture images of the other side of the component, greatly improving the efficiency of SMT soldering quality inspection. After inspection, the clamping plate 4 is no longer holding the component, and the component can then be removed from the placement plate 2. After the clamping plate 4 has finished clamping the component, the moving rod 9 is raised by the moving component to bring the component closer to the camera 20. At this time, the camera 20 can capture images of the component more clearly. After the inspection of one side of the component is completed, the fixed block 3 is rotated 180 degrees by the drive motor 6 to change the side of the component held by the clamping plate 4. Then, the camera 20 is used to capture and inspect the other side of the component. When the moving rod 9 needs to move upward, the lead screw 13 can control the slider 12 to move closer to the first cavity 14. At this time, the slider 12 pushes the round rod 17, causing the round rod 17 to push the push plate 16. The push plate 16 then pushes the gas in the first cavity 14, allowing the first conduit 15 to enter the fixed rod 8 and push the moving rod 9. After the moving rod 9 moves to the appropriate position, the first control valve is closed, and the first cavity 14 is in a sealed state. The moving rod 9 will no longer move, and the slider 12 can then move normally. When the moving rod 9 needs to move downward, the first control valve is opened, and the second spring pulls the moving rod 9 to reset. Simultaneously, the first spring pushes the push plate 16. When the clamping plate 4 is needed to hold the component, the first control valve can be closed and the second control valve opened, and then the lead screw 13 can control the slider 12 to move downward. Block 12 moves closer to the first cavity 14, allowing push plate 16 to push the gas in the first cavity 14 through the second conduit 18 into the connecting rod 19 to push push rod 7, so that push rod 7 pushes clamping plate 4 to clamp the component. After clamping the component, push plate 16 continues to push the gas in the first cavity 14. At this time, the second control valve is closed and the first control valve is open. Then the gas will enter the connecting rod 19 through the first conduit 15 to push moving rod 9 to move. After moving rod 9 moves to the appropriate position, the first control valve is closed. When both the first and second control valves are closed, the first cavity 14 is in a sealed state. At this time, moving rod 9 and push rod 7 will no longer move. When the second control valve is opened, the second spring will pull push rod 7 to reset. When the first control valve is opened, the second spring will pull moving rod 9 to reset. When the moving rod 9 moves upward, it will drive the clamping plate 4 to move upward. After the component contacts the brush 22, one end of the moving rod 9 can be stopped. Then, when the camera 20 moves, the brush 22 will first brush away the impurities on the component to avoid misjudging the poor welding quality due to the impurities captured by the camera 20. When the slider 12 moves, the second cavity 23 can be injected with air by means of the air injection component. At this time, the gas can be sprayed out from the air outlet 24, so that the gas is sprayed on the component to improve the cleaning effect of the component. When it is necessary to inject air into the second cavity 23, the slider 12 moves. At this time, the slider 12 will drive the magnetic block 26 to move. When the magnetic block 26 moves to one side, the solenoid valve on the connecting pipe 27 on that side will be opened. At this time, the magnetic block 26 will push the gas in the second cavity 23, so that the gas in the second cavity 23 can enter the second cavity 23 from the connecting pipe 27.

[0033] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0034] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inspection device for SMT soldering quality, comprising a base (1) having a placement plate (2) fixedly connected to the top surface of the base (1); Its features are: A fixing block (3) is provided on the base (1). A first sliding groove (5) is provided on the side of the fixing block (3) near the placement plate (2). A set of clamping plates (4) is slidably connected in the first sliding groove (5). A rotating component for rotating the fixing block (3) is provided on the base (1). A push rod (7) is fixedly connected to one side of the clamping plates (4) that are far apart from each other, and a moving component for driving the push rod (7) to move is provided on the base (1); A support plate is fixedly connected to the base (1), and a connecting block (10) is fixedly connected to one end of the support plate away from the base (1). A second sliding groove (11) is opened on the bottom surface of the connecting block (10), and a lead screw (13) is rotatably connected to the inner wall of the second sliding groove (11). The lead screw (13) is threadedly connected to a slider (12), and a camera (20) is fixedly connected to the bottom surface of the slider (12). A control motor for driving the lead screw (13) to rotate is fixedly connected to the side of the connecting block (10) away from the fixed block (3).

2. The inspection equipment for SMT soldering quality according to claim 1, characterized in that: The rotating assembly includes a fixed rod (8) fixed on the base (1), the top end of the fixed rod (19) (8) is open, the inner wall of the fixed rod (8) is sealed and slidably connected to a moving rod (9), the top end of the moving rod (9) is fixedly installed with a drive motor (6), the output end of the drive motor (6) is fixedly connected to the fixed block (3), and the moving assembly is also used to control the moving rod (9) to move.

3. The inspection equipment for SMT soldering quality according to claim 2, characterized in that: The movable component includes a first cavity (14) opened in the connecting block (10), a push plate (16) is slidably connected to the inner wall of the first cavity (14), a round rod (17) is fixedly connected to the side of the push plate (16) near the second slide groove (11), the round rod (17) extends into the second slide groove (11), a first spring is fixedly connected between the side of the push plate (16) away from the round rod (17) and the inner wall of the first cavity (14), a first conduit (15) is connected between the first cavity (14) and the inside of the fixed rod (8), a first control valve is provided on the first conduit (15), and a second spring is fixedly connected between the bottom surface of the movable rod (9) and the inner wall of the fixed rod (8).

4. The inspection equipment for SMT soldering quality according to claim 3, characterized in that: The moving component also includes connecting rods (19) fixed on both sides of the fixed block (3). The connecting rods (19) are open on the side close to each other. The push rod (7) is slidably connected to the inner wall of the connecting rod (19). A third spring is fixedly connected between the end of the push rod (7) away from the clamp (4) and the inner wall of the connecting rod (19). A first control valve is provided on the first conduit (15). A second conduit (18) is connected between the inside of the fixed rod connecting rod (19) and the first cavity (14). A second control valve is provided on the second conduit (18).

5. The inspection equipment for SMT soldering quality according to claim 1, characterized in that: The slider (12) is fixedly connected to a mounting plate on the side near the control motor. A rectangular block (21) is fixedly connected to the bottom surface of the mounting plate, and a brush bristle (22) is fixedly connected to the bottom surface of the rectangular block (21).

6. The inspection equipment for SMT soldering quality according to claim 5, characterized in that: The rectangular block (21) has a second cavity (23) inside, and a set of air outlets (24) are provided on the bottom surface of the rectangular block (21). The connecting block (10) is provided with an air injection component for injecting air into the air outlets (24).

7. The inspection equipment for SMT soldering quality according to claim 6, characterized in that: The gas injection assembly includes a third cavity (25) opened in the connecting block (10), a magnetic block (26) is slidably connected in the third cavity (25), the magnetic block (26) is magnetically attracted to the slider (12), a pair of symmetrically arranged connecting pipes (27) are connected in the third cavity (25), one end of the connecting pipe (27) away from the third cavity (25) is connected to the second cavity (23), and a solenoid valve is provided on the connecting pipe (27).

8. The inspection equipment for SMT soldering quality according to claim 7, characterized in that: The rectangular block (21) has a hollow groove (28) inside, and the bottom surface of the rectangular block (21) has a liquid outlet hole (31) communicating with the hollow groove (28). The hollow groove (28) is connected to a liquid inlet pipe (30).

9. The inspection equipment for SMT soldering quality according to claim 8, characterized in that: A sealing sheet (32) is fixedly connected inside the liquid outlet hole (31). The sealing sheet (32) is made of elastic material and has multiple sets of micropores.

10. The inspection equipment for SMT soldering quality according to claim 9, characterized in that: An electromagnet (29) is fixedly connected to the top surface of the inner wall of the hollow groove (28), and a pressure plate (33) is slidably connected to the inner wall of the hollow groove (28). A fourth spring is fixedly connected between the pressure plate (33) and the top surface of the inner wall of the hollow groove (28), and the pressure plate (33) and the electromagnet (29) are magnetically attracted to each other.

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