A full-automatic 3D solder paste precision detection equipment

Abstract

The application discloses a kind of full-automatic 3D tin cream precision detection equipment, it is related to tin cream detection technical field, including, fixed in the bottom end of edge clamp component with synchronous lifting of it support plate;Supporting leg of equal-angle activity is set in support plate to support circuit board;Symmetrically set in the middle of edge clamp component piston rod and liquid storage tube;Equal-angle distribution is in the bottom end of support plate liquid storage tray;Supporting spring is set in support leg with liquid in liquid storage tray enters and is extruded to increase force;Connecting rod and limit rod are hingedly arranged in the bottom end of support leg;Push plate is set in the bottom end of support plate.The application ingeniously utilizes the characteristics that edge clamp component adjusts clamping spacing with the size change of circuit board, pushes liquid in the middle liquid storage tube to compensate and flow out in proportion, liquid drives multiple sets of supporting legs to move in equal proportion, can form effective support to middle area, reduce the cantilever vibration easily produced due to lack of support in middle, to improve the accuracy of detection data.

Description

Technical Field

[0001] This invention relates to the field of solder paste testing technology, specifically to a fully automated 3D solder paste precision testing device. Background Technology

[0002] Fully automated 3D solder paste precision inspection equipment is a core quality control node in SMT (Surface Mount Technology) production lines, primarily serving the consumer electronics, automotive electronics, and high-end communication board manufacturing industries. Through non-contact optical measurement and high-precision 3D reconstruction technology, this equipment can perform micron-level morphological analysis on printed solder paste to ensure the reliability of subsequent component placement and reflow soldering processes.

[0003] Generally, the circuit board is transported to the inspection station via a belt conveyor, and is lifted and fixed by a side clamp positioning mechanism. Then, structured light is emitted through the precision grating projection or laser unit built into the equipment. Based on phase measurement profilometry or multi-view stereo vision principles, the solder paste on the circuit board pads is scanned in three dimensions to obtain key parameters such as the volume, area, height, and coplanarity of the solder paste, thereby achieving accurate detection and real-time feedback of printing defects (such as insufficient solder, solder bridging, and solder spikes).

[0004] However, when inspecting large and thin circuit boards, their inherent rigidity is insufficient. Relying solely on side clamps for fixation leaves the middle area of ​​the circuit board without effective support. In this case, if the equipment operates or the external environment causes even minor vibrations, the middle section of the circuit board is prone to large vertical amplitudes or flexural deformations. This cantilever vibration directly interferes with the projection and imaging path of the grating stripes, leading to fluctuations or even distortions in the measurement data. On the one hand, the vibration causes relative shaking between the 3D camera and the circuit board, resulting in blurred or ghosted images, making it impossible to establish an accurate 3D model. On the other hand, the vertical fluctuations of the board surface cause the reference plane to drift, leading to systematic errors in measurements such as solder paste height and volume. These factors work together to ultimately affect the repeatability and accuracy of the test results, leading to the risk of false alarms or missed alarms.

[0005] To address the aforementioned issues, there is an urgent need for innovative design based on the existing fully automated 3D solder paste precision testing equipment. Summary of the Invention

[0006] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the present invention aims to provide a fully automated 3D solder paste precision inspection device to solve the problem mentioned in the background technology that when the circuit board is large and thin, the middle area is difficult to support effectively, is easily subject to vibration, and affects the accuracy and repeatability of the inspection data.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a fully automatic 3D solder paste precision inspection device, comprising a device body, a clamping assembly fixed in the device body, and a circuit board movably disposed in the middle of the clamping assembly, and further comprising: A support plate fixed to the bottom of the side clamp assembly and rising and falling synchronously with it; Equally angled movable support feet are set in the support plate to support the circuit board; A piston rod and a liquid storage tube are symmetrically arranged in the middle of the side clamp assembly and extend and retract with its movement; Liquid storage trays are evenly distributed at the bottom of the support plate, and the amount of liquid changes with the rise and fall of the plate. A support spring, installed in the support foot, is compressed and its force is increased as the liquid in the reservoir enters the support foot. A connecting rod and a limiting rod are hinged at the bottom of the support foot to drive it to move proportionally. A push plate installed at the bottom of the support plate that moves with the change in the amount of liquid in the storage tube; An arc-shaped plate symmetrically fixed on one side of the push plate, which is subjected to the displacement of the thrust force and the deformation of the limiting rod; A disc fixed to the bottom of the support plate to limit the movement of the limiting rod.

[0008] Preferably, the side clamp assembly includes symmetrically distributed guide rails, and a lifting plate is movably provided on the inner side of the guide rails; The inner wall of the guide rail is fixed to the piston rod, and the guide rail does not contact the support plate; The lifting plate is fixed to the support plate, and the piston rod does not contact the support plate in the middle; A detection head is provided above the side clamp assembly, and the detection head is fixed to the main body of the device.

[0009] Preferably, the surface of the support plate is provided with sliding grooves at equal angles along the diagonal positions, and a support foot is movably inserted into the sliding groove; The support plate has trapezoidal grooves at both ends, and the trapezoidal grooves do not contact the side clamp assembly; A square box is fixed to the bottom of the support plate.

[0010] Preferably, the bottom end of the support plate has a liquid storage box, and multiple sets of liquid storage boxes are fixed at equal intervals. One end of each set of liquid storage boxes is connected to a liquid storage tray, and the other end of each set of liquid storage boxes passes through a support plate and is connected to a support foot.

[0011] Preferably, the liquid storage tray is fixed in the main body of the equipment, and a push rod is movably inserted into the liquid storage tray, with the bottom end of the push rod being adapted to the inner wall of the liquid storage tray; The top end of the push rod is fixed to the bottom end of the support plate, and a sealing ring is provided on the surface of the push rod; The liquid storage tray, liquid storage box, liquid storage tube, and square box are all filled with liquid.

[0012] Preferably, multiple sets of the liquid storage tubes are horizontally distributed vertically, and piston rods are movably inserted into both sides of the liquid storage tubes; The liquid storage tube located at the bottom is connected to the liquid storage tray, and the liquid storage tube located at the top is connected to the square box; A return spring is fixed in the middle of the two sets of piston rods in the same set of liquid storage tubes.

[0013] Preferably, the support legs are distributed in several groups in equal proportion, and a top rod is movably inserted into the top of each group of support legs; The top end of the push rod contacts the bottom end of the circuit board, and the bottom end of the push rod is fixed to the top end of the support spring; Some of the support legs are movably inserted into the sliding groove, while the remaining support legs are suspended above the support plate; The surface of the support foot is fixedly fitted with a telescopic rod, and the other end of the telescopic rod is fixed to the adjacent support foot. The telescopic rod is equipped with a return spring inside.

[0014] Preferably, a circular block is fixed to the bottom end of the support spring, and the circular block is movably connected to the inner wall of the support foot. The inner wall of the support foot is provided with a groove corresponding to the circular hole. Liquid is provided at the bottom of the circular block in the support leg, and the circular block is in contact with the liquid.

[0015] Preferably, the surface of the disc is provided with equally spaced arc-shaped grooves, and a limiting rod is movably inserted into the arc-shaped grooves; The bottom end of the limiting rod is hinged to the arc-shaped plate, and the arc-shaped plate is arc-shaped. The limiting rod and the connecting rod are hinged together, and multiple sets of the supporting feet are connected to the connecting rod through the limiting rod.

[0016] Preferably, the square box has symmetrical moving rods fixed on both sides, and a push plate is fixed at the top of the moving rods; A reset spring is fixed in the middle of the square box.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention cleverly utilizes the feature of the side clamp assembly that can adjust the clamping distance according to the size of the circuit board. As the side clamps move synchronously to both sides or towards the middle, the liquid in the middle reservoir tube is pushed outward in a proportional manner to compensate for the outward flow. The liquid drives multiple sets of support feet to move in a proportional manner, thereby realizing adaptive adjustment of the support position according to the circuit board of different sizes. This allows the circuit board to obtain effective support during the testing process. Especially for circuit boards that are large in size and thin in thickness, it can form effective support for the middle area, reducing the cantilever vibration problem that is easily caused by the lack of support in the middle. Through multi-point support, the deflection deformation of the board surface is effectively suppressed, and the interference of grating stripes and image blurring caused by vibration are reduced, thereby improving the accuracy of the test data.

[0018] 2. This invention cleverly utilizes the adaptive movement characteristics of two sets of side clamp assemblies as the circuit board length changes. During the movement of the side clamps, the liquid flowing out of the liquid storage tube is temporarily stored in the liquid storage pan, so that the rising support foot forms adaptive support with the circuit board. An adaptive top rod is movably set at the top of the support foot. After the top rod and the circuit board are adaptively supported, the liquid enters the bottom of the support foot and applies pressure to the support spring, further enhancing the support force of the top rod on the circuit board and reducing the possibility of vibration. While providing stable support, the elastic buffering effect of the support spring effectively absorbs external vibration, avoids relative shaking of the circuit board during testing, prevents reference plane drift, and improves the accuracy and repeatability of measurements such as solder paste height and volume. Ultimately, it achieves stable support and reliable fixation of the circuit board, reducing the risk of false alarms and missed alarms. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the third three-dimensional structure of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the circuit board and piston rod of the present invention.

[0023] Figure 5 This is a three-dimensional structural diagram of the fixing plate and piston rod of the present invention.

[0024] Figure 6 This is a three-dimensional structural diagram of the sliding groove and telescopic rod of the present invention.

[0025] Figure 7 This is a three-dimensional cross-sectional structural diagram of the support foot of the present invention.

[0026] Figure 8 This is a three-dimensional structural diagram of the liquid storage box and disc of the present invention.

[0027] Figure 9 This is a three-dimensional cross-sectional structural diagram of the square box and push plate of the present invention.

[0028] Figure 10 This is a three-dimensional structural diagram of the push plate and the arc plate of the present invention.

[0029] Figure 11 This is a three-dimensional structural diagram of the square box and the movable rod of the present invention.

[0030] Figure 12 This is a three-dimensional structural diagram of the liquid storage tray and liquid storage box of the present invention.

[0031] Figure 13 This is a three-dimensional structural diagram of the piston rod and liquid storage tube of the present invention. Figure 14 This is a three-dimensional structural diagram of the liquid storage tray and push rod of the present invention.

[0032] In the diagram: 1. Main body of the equipment; 2. Side clamp assembly; 201. Guide rail; 202. Lifting plate; 3. Circuit board; 4. Support plate; 5. Liquid storage tray; 6. Liquid storage box; 7. Piston rod; 8. Liquid storage pipe; 9. Sliding groove; 10. Support foot; 11. Top rod; 12. Support spring; 13. Disc; 14. Connecting rod; 15. Limiting rod; 16. Square box; 17. Push plate; 18. Arc plate; 19. Moving rod; 20. Push rod; 21. Telescopic rod. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 14 This invention provides a technical solution: a fully automatic 3D solder paste precision inspection device, comprising a device body 1, a side clamp assembly 2 fixed in the device body 1, and a circuit board 3 movably disposed in the middle of the side clamp assembly 2, and further comprising: A support plate 4 is fixed to the bottom of the side clamp assembly 2 and rises and falls synchronously with it. The support feet 10, which are set at equal angles to support the circuit board 3 in the support plate 4, are also provided. A piston rod 7 and a liquid storage tube 8 are symmetrically arranged in the middle of the side clamp assembly 2 and move and extend with it. Liquid storage trays 5 are evenly distributed at the bottom of the support plate 4, and the liquid volume changes with its rise and fall. A support spring 12 is installed in the support foot 10 and is compressed and increased in force as the liquid in the liquid storage pan 5 enters; A connecting rod 14 and a limiting rod 15 are hinged at the bottom of the support leg 10 to drive it to move proportionally. A push plate 17 is installed at the bottom of the support plate 4 and moves with the change in the amount of liquid in the liquid storage tube 8. An arc-shaped plate 18 is symmetrically fixed on one side of the push plate 17 and deformed by the displacement of the limit rod 15 due to the thrust. The disc 13 is fixed at the bottom of the support plate 4 to limit the movement of the limiting rod 15.

[0035] Additionally, it should be noted that circuit board 3 is typically fed smoothly to the bottom of the detection head via a high-precision linear guide rail 201. The entire process is simple and efficient. The equipment receives the circuit board from the previous device via a belt, and the lifting plate 202 below lifts the circuit board 3 smoothly via a cylinder. Subsequently, a high-precision servo motor drives the detection head to move at high speed along the X / Y axis and perform laser scanning at a preset position to complete the acquisition of 3D data such as solder paste thickness and area. This is existing technology and will not be elaborated on further here.

[0036] In a specific implementation, the side clamp assembly 2 includes symmetrically distributed guide rails 201, and a lifting plate 202 is movably arranged on the inner side of the guide rails 201. The inner wall of the guide rail 201 is fixed to the piston rod 7, and the guide rail 201 does not contact the support plate 4; the lifting plate 202 is fixed to the support plate 4, and the piston rod 7 does not contact the support plate 4 in the middle; a detection head is provided above the side clamp assembly 2, and the detection head is fixed on the main body 1 of the equipment.

[0037] In addition, it should be noted that by adjusting the clamping distance of the two sets of side clamping components 2 for circuit boards 3 of different sizes, the piston rod 7 can squeeze the liquid in the liquid storage tube 8. The liquid is output in a certain proportion according to the distance of movement, so that multiple sets of support feet 10 can move and adjust proportionally. By driving multiple sets of support feet 10 to adjust adaptively through the liquid "proportionally", no matter how the size of the circuit board 3 changes, the support feet 10 can automatically provide a corresponding support point in the middle area, effectively suppressing the deflection and deformation of the circuit board. The improvement of the board surface flatness directly reduces the distortion of grating stripes caused by board surface shaking, ensuring the stability of the reference plane when the camera acquires phase images, thereby improving the true value of the measurement of key parameters such as solder paste volume and area.

[0038] In specific implementation, the support plate 4 has sliding grooves 9 at equal angles along the diagonal of its surface, and a support foot 10 is movably inserted into the sliding groove 9; trapezoidal grooves are provided at both ends of the support plate 4, and the trapezoidal grooves do not contact the side clamp assembly 2; a square box 16 is fixed at the bottom of the support plate 4.

[0039] In addition, it should be noted that the trapezoidal groove prevents the support plate 4 from colliding with the components between the side clamp assembly 2 during use, thus protecting different components, reducing unnecessary downtime and maintenance, and allowing each component to operate smoothly.

[0040] In specific implementation, the bottom end of the support plate 4 has a liquid storage box 6, and multiple sets of liquid storage boxes 6 are fixed at equal intervals; one end of the multiple sets of liquid storage boxes 6 is connected to the liquid storage tray 5, and the other end of the multiple sets of liquid storage boxes 6 passes through the support plate 4 and is connected to the support foot 10.

[0041] Additionally, it should be noted that multiple sets of liquid storage boxes 6 are connected to two adjacent sets of support feet 10, such as... Figure 5 As shown, when the push rod 11 adapts to the warping of the bottom of the circuit board 3, the liquid volume of the support foot 10 is replenished again, increasing the force of the support spring 12, allowing the support spring 12 to deform further and increase its rigidity, thereby applying force to the push rod 11, making the force applied by the push rod 11 to the main body of the equipment 1 stronger, which can support more stably and reduce vibration. The liquid pressure provides a continuous, non-rigid locking force, preventing the reference plane from drifting when the circuit board moves at high speed, improving the repeatability of solder paste height measurement, and reducing false alarms and missed alarms caused by relative shaking.

[0042] In practice, the liquid storage tray 5 is fixed in the main body 1 of the equipment, and a push rod 20 is movably inserted in the liquid storage tray 5, with the bottom end of the push rod 20 matching the inner wall of the liquid storage tray 5; the top end of the push rod 20 is fixed to the bottom end of the support plate 4, and a sealing ring is provided on the surface of the push rod 20; the liquid storage tray 5, the liquid storage box 6, the liquid storage pipe 8, and the square box 16 are all filled with liquid.

[0043] Additionally, it should be noted that the push rod 20 moves synchronously with the lifting and lowering of the support plate 4, as shown in the connecting rod 14. When different sized circuit boards 3 are tested, the spacing between the clamping assemblies 2 is adjusted. As the spacing between the clamping assemblies 2 adjusts, the liquid in the storage tube 8 enters the storage pan 5 proportionally. The amount of liquid in the storage pan 5 is proportional to the spacing between the clamping assemblies 2. After the push rod 20 moves upward, it squeezes the liquid in the storage pan 5 through the storage box 6 and delivers it to the support foot 10. Utilizing the inevitable movement of the clamps, through purely mechanical fluid linkage, the incompressibility of the liquid, and the proportional relationship of the flow rate, synchronous and proportional adjustment of the support position and the clamping position is achieved without the need for additional sensors, motors, or manual intervention. When the main body 1 undergoes line changes, the support system adapts automatically with the clamping assemblies 2, shortening the line change time and improving the continuous operation efficiency of the equipment.

[0044] In practice, multiple sets of liquid storage tubes 8 are horizontally distributed vertically, and piston rods 7 are movably inserted on both sides of the liquid storage tubes 8; the liquid storage tube 8 located at the bottom is connected to the liquid storage tray 5, and the liquid storage tube 8 located at the top is connected to the square box 16; a return spring is fixed in the middle of the two sets of piston rods 7 in the same set of liquid storage tubes 8; a return spring is fixed in the middle of the two sets of piston rods 7 in the same set of liquid storage tubes 8.

[0045] In addition, it should be noted that the two sets of liquid storage tubes 8 are connected to the liquid storage tray 5 and the square box 16 respectively. The liquid change ratio is the same, and the change in size is adaptively adjusted by the liquid. Similarly, the piston rod 7 adjusts the liquid delivered in the liquid storage tube 8 according to the spacing of the side clamp assembly 2, and can adaptively adjust the liquid volume. This allows for just the right adjustment of the support force required for different sizes, and also reduces the transmission of high-frequency micro-vibrations from the equipment conveying track and the external environment to the circuit board.

[0046] In specific implementation, the support feet 10 are distributed in several groups in equal proportion, and the top of the top of the multiple groups of support feet 10 is movably inserted with a top rod 11; the top of the top rod 11 is in contact with the bottom of the circuit board 3, and the bottom of the top rod 11 is fixed to the top of the support spring 12. Additionally, it should be noted that the number of support feet 10 is matched to the size of the circuit board 3, such as... Figure 7 As shown, the support spring 12 can be adjusted according to actual needs. It can support the top rod 11 and can also be adjusted adaptively when the bottom of the circuit board 3 warps. At the same time, the support spring 12 can increase the supporting force of the top rod 11 in the opposite direction, so that it can stably support the circuit board 3.

[0047] Some of the support legs 10 are movably inserted into the sliding groove 9, and the remaining support legs 10 are suspended above the support plate 4; a telescopic rod 21 is fixedly sleeved on the surface of the support leg 10, and the other end of the telescopic rod 21 is fixed to the adjacent support leg 10, and a return spring is provided inside the telescopic rod 21.

[0048] Additionally, it should be noted that... Figure 5 As shown, the support foot 10 located at the corner is movably inserted into the sliding groove 9, and the remaining support foot 10 is suspended on the support plate 4. The suspended support foot 10 is fixed to the adjacent support foot 10 by means of the telescopic rod 21. The suspended support foot 10 moves proportionally with the sliding support foot 10. The length of the telescopic rod 21 is adjusted according to the moving position of the support foot 10 and the multiple sets of spacing.

[0049] In specific implementation, a circular block is fixed at the bottom of the support spring 12, and the circular block is movably inserted into the inner wall of the support foot 10. The inner wall of the support foot 10 is provided with a groove corresponding to the circular hole. Liquid is provided at the bottom of the circular block in the support foot 10, and the circular block is in contact with the liquid.

[0050] Additionally, it should be noted that... Figure 7 As shown, when the liquid enters the support foot 10, the circular hole pushes the support spring 12 to move upward, applying force to the support spring 12 and the top rod 11. After the top rod 11 moves adaptively, it further increases the support force on the circuit board 3. Driven proportionally by the liquid, this "flexible and balanced" support force ensures that the circuit board 3 is always stably supported within the focal depth range of the optical lens during the full-area scanning and detection process, reducing the impact of equipment or external vibrations and ensuring the consistency of the entire board detection.

[0051] In specific implementation, the surface of the disc 13 is provided with equally spaced arc-shaped grooves, and a limiting rod 15 is movably inserted in the arc-shaped grooves; the bottom end of the limiting rod 15 is hinged to the arc-shaped plate 18, and the arc-shaped plate 18 is set to be arc-shaped; the limiting rod 15 is hinged to the connecting rod 14, and multiple sets of support feet 10 are connected to the connecting rod 14 through the limiting rod 15.

[0052] Additionally, it should be noted that... Figure 9 and Figure 10 As shown, when the size of the circuit board 3 changes, multiple sets of limiting rods 15 slide up or down in the arc-shaped groove, pulling the limiting rods 15 back or pushing them outward, thereby causing the deformation of the connecting rod 14 to move the support foot 10 at the diagonal. The movable support foot 10 drives the suspended support foot 10 to move, and multiple sets of support feet 10 move simultaneously and proportionally, adaptively adjusting to adapt to the detection of circuit boards 3 of different sizes.

[0053] In practice, movable rods 19 are symmetrically fixed on both sides of the square box 16, and a push plate 17 is fixed at the top of the movable rods 19; a return spring is fixed in the middle of the square box 16.

[0054] Additionally, it should be noted that... Figure 11 As shown, when liquid enters the square box 16, the moving rod 19 is pushed outward or retracted to the corresponding position according to the amount of liquid entering, causing the support foot 10 to move in different proportions. When the size of the circuit board 3 decreases, there is space between the liquid storage tube 8 and the piston rod 7. Through the return spring, the liquid returns to the piston rod 7, thereby reducing the amount of liquid in the square box 16. The moving rod 19 and the arc plate 18 then move inward. Working principle: When using this fully automatic 3D solder paste precision inspection equipment, the main body 1 of the equipment first receives the circuit board 3 transmitted from the previous equipment through the side clamp assembly 2. The width between the side clamp assemblies 2 is automatically adjusted according to the size of the circuit board 3.

[0055] When the size of circuit board 3 increases, the two sets of guide rails 201 drive the lifting plate 202 to move to both sides simultaneously. As the guide rails 201 move, they drive the two sets of piston rods 7 to move to both sides in the liquid storage tube 8, squeezing out the liquid and sending it to the liquid storage tray 5 and the square box 16 respectively. The liquid in the square box 16 simultaneously pushes multiple sets of moving rods 19 to move outward. Then the moving rods 19 drive the push plate 17 and the arc plate 18 to move to both sides simultaneously. When the arc plate 18 moves, it drives the hinged limiting rod 15 to slide upward in the arc groove of the disc 13.

[0056] When one end of the limiting rod 15 slides upward in the arc-shaped groove of the disc 13, the limiting rod 15 extends and drives one set of support feet 10 to move outward. The movement of this set of support feet 10 pushes the connecting rod 14 to extend and pushes another set of support feet 10 at the diagonal to move outward. The outer support feet 10 drive the other two sets of suspended support feet 10 to move simultaneously through the telescopic rod 21. The support feet 10 at the diagonal slide in the sliding groove 9. The telescopic rod 21 extends according to the spacing between the support feet 10 (in this application, 4 support feet 10 are used as a group, but the actual number of a group is adjusted according to the number of support feet 10). After the multiple sets of support feet 10 extend, they move in a proportional manner, providing adaptive and equidistant support to different positions of the circuit board 3, forming effective support. When the size of the circuit board 3 becomes smaller, the same principle applies to the reverse movement.

[0057] Subsequently, the lifting plate 202 below pushes the circuit board 3 upwards smoothly via a cylinder. At this time, the lifting plate 202 drives the support plate 4 to move upwards simultaneously, causing the multiple sets of support feet 10 on the support plate 4 to move upwards until they contact the bottom of the circuit board 3. The push rod 11 moves downwards to a suitable position in the support foot 10 according to the degree of warping of the bottom of the circuit board 3, compressing the support spring 12. The upward movement of the support plate 4 simultaneously drives the push rod 20 to move upwards, squeezing and conveying the liquid in the liquid storage tray 5 to the liquid storage box 6. The liquid storage box 6 then conveys the liquid to the support foot 10, pushing the circular block in the support foot 10 upwards again, compressing the support spring 12, and applying force to the push rod 11, making the push rod 11 support the circuit board 3 more stably. The greater the distance between the two sets of side clamp assemblies 2, the greater the force applied, adapting to the support of circuit boards 3 of different sizes.

[0058] After the test is completed, the lifting plate 202 moves down and the circuit board 3 returns to the belt and continues to be conveyed. As the lifting plate 202 moves down, the support plate 4 moves down and resets synchronously, thereby resetting the push rod 11. At the same time, the push rod 20 moves down with the support plate 4. Space appears in the liquid storage tray 5 and the force of the support spring 12 helps the liquid return to the liquid storage box 6 and the liquid storage tray 5. After the lifting plate 202 is lifted again, the force is repeatedly applied to the push rod 11.

[0059] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fully automatic 3D solder paste precision inspection device, comprising a main body (1), a clamping assembly (2) fixed in the main body (1), and a circuit board (3) movably disposed in the middle of the clamping assembly (2), characterized in that, Also includes: A support plate (4) is fixed to the bottom of the side clamp assembly (2) and rises and falls synchronously with it. The support feet (10) are set at equal angles in the support plate (4) to support the circuit board (3). A piston rod (7) and a liquid storage tube (8) are symmetrically arranged in the middle of the side clamp assembly (2) and move and extend with it. Liquid storage trays (5) are evenly distributed at the bottom of the support plate (4) and change the amount of liquid as it rises and falls. A support spring (12) is installed in the support foot (10) and enters the liquid storage pan (5) with the pressure increased by the liquid. A connecting rod (14) and a limiting rod (15) are hinged at the bottom of the support foot (10) to drive it to move proportionally. A push plate (17) is installed at the bottom of the support plate (4) and moves with the change in the amount of liquid in the storage pipe (8). An arc-shaped plate (18) is symmetrically fixed on one side of the push plate (17) and deformed by the displacement of the limit rod (15) caused by the thrust. A disc (13) is fixed at the bottom of the support plate (4) to limit the movement of the limiting rod (15).

2. The fully automatic 3D solder paste precision testing equipment according to claim 1, characterized in that: The side clamp assembly (2) includes symmetrically distributed guide rails (201), and a lifting plate (202) is movably provided on the inner side of the guide rails (201). The inner wall of the guide rail (201) is fixed to the piston rod (7), and the guide rail (201) does not contact the support plate (4); The lifting plate (202) is fixed to the support plate (4), and the piston rod (7) does not contact the support plate (4) in the middle; The side clamp assembly (2) is provided with a detection head above it, and the detection head is fixed on the main body of the device (1).

3. The fully automatic 3D solder paste precision testing equipment according to claim 1, characterized in that: The support plate (4) has sliding grooves (9) at equal angles along the diagonal of its surface, and a support foot (10) is movably inserted into the sliding groove (9). The support plate (4) has trapezoidal grooves at both ends, and the trapezoidal grooves do not contact the side clamp assembly (2); A square box (16) is fixed to the bottom end of the support plate (4).

4. The fully automatic 3D solder paste precision testing equipment according to claim 1, characterized in that: The bottom end of the support plate (4) has a liquid storage box (6), and multiple sets of liquid storage boxes (6) are fixed at equal intervals. One end of the multiple sets of liquid storage boxes (6) is connected to the liquid storage tray (5), and the other end of the multiple sets of liquid storage boxes (6) passes through the support plate (4) and is connected to the support foot (10).

5. The fully automatic 3D solder paste precision testing equipment according to claim 1, characterized in that: The liquid storage tray (5) is fixed in the main body of the equipment (1), and a push rod (20) is movably inserted in the liquid storage tray (5), and the bottom end of the push rod (20) is adapted to the inner wall of the liquid storage tray (5); The top end of the push rod (20) is fixed to the bottom end of the support plate (4), and a sealing ring is provided on the surface of the push rod (20); The liquid storage tray (5), liquid storage box (6), liquid storage tube (8) and square box (16) are all filled with liquid.

6. The fully automatic 3D solder paste precision testing equipment according to claim 1, characterized in that: Multiple sets of the liquid storage tubes (8) are horizontally distributed vertically, and piston rods (7) are movably inserted on both sides of the liquid storage tubes (8). The liquid storage tube (8) located at the bottom is connected to the liquid storage tray (5), and the liquid storage tube (8) located at the top is connected to the square box (16); A return spring is fixed in the middle of the two sets of piston rods (7) in the same set of liquid storage tubes (8).

7. The fully automatic 3D solder paste precision testing equipment according to claim 1, characterized in that: The support legs (10) are distributed in several groups in equal proportions, and the top of the top of the multiple groups of support legs (10) is movably inserted with a top rod (11). The top end of the top rod (11) is in contact with the bottom end of the circuit board (3), and the bottom end of the top rod (11) is fixed to the top end of the support spring (12); Some of the support feet (10) are movably inserted into the sliding groove (9), while the remaining support feet (10) are suspended above the support plate (4); The surface of the support foot (10) is fixedly fitted with a telescopic rod (21), and the other end of the telescopic rod (21) is fixed to the adjacent support foot (10). The telescopic rod (21) is provided with a return spring inside.

8. The fully automatic 3D solder paste precision testing equipment according to claim 1, characterized in that: The bottom end of the support spring (12) is fixed with a circular block, and the circular block is movably connected to the inner wall of the support foot (10). The inner wall of the support foot (10) is provided with a sliding groove corresponding to the circular hole. Liquid is provided at the bottom of the circular block in the support foot (10), and the circular block is in contact with the liquid.

9. The fully automatic 3D solder paste precision testing equipment according to claim 1, characterized in that: The surface of the disc (13) is provided with equally spaced arc-shaped grooves, and a limiting rod (15) is movably inserted into the arc-shaped groove. The bottom end of the limiting rod (15) is hinged to the arc plate (18), and the arc plate (18) is set to be arc-shaped; The limiting rod (15) and the connecting rod (14) are hinged together, and multiple sets of the supporting feet (10) are connected to the connecting rod (14) through the limiting rod (15).

10. The fully automatic 3D solder paste precision testing equipment according to claim 5, characterized in that: The square box (16) has symmetrical moving rods (19) fixed on both sides, and a push plate (17) is fixed at the top of the moving rods (19). A reset spring is fixed in the middle of the square box (16).

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