A quality inspection system and method for chip mounter products.

Abstract

This invention discloses a quality inspection system and method for products used in a pick-and-place machine, relating to the field of PCB board inspection technology. The process includes the following steps: S1: Sampling the PCB products after placement by the pick-and-place machine, and then assembling the PCB products using a testing frame to simulate their installation within a housing; S2: Dropping the PCB products from a height using a drop-proof testing device to simulate the action of the PCB products falling from a height; repeating this step multiple times; S3: After testing, removing the PCB products and determining whether they are broken by capturing and analyzing images of the solder joints of the components on the PCB, thus achieving quality inspection. The testing frame designed in this invention can install multiple PCB boards at once and simulate the installation state of the PCB boards within the product housing. Combined with a lifting device and a pushing device, the testing frame is raised and dropped from a height to simulate the action of the product falling, thereby detecting whether the surface-mount solder joints of the components on the PCB board are secure.

Description

Technical Field

[0001] This invention relates to the field of PCB board inspection technology, and in particular to a quality inspection system and method for chip mounter products. Background Technology

[0002] A pick-and-place machine, also known as a "placement machine," is a device installed after a dispensing machine or screen printer in a production line. It is a device that accurately places surface mount components onto PCB pads by moving the placement head.

[0003] In current PCB board soldering, solder paste is first applied to the corresponding positions on the PCB board, and then a pick-and-place machine precisely picks up the components and places them on the board, ensuring that the multiple pins of the components are precisely aligned with the solder paste. Afterwards, a reflow oven is used to melt the solder paste, thus firmly bonding the surface mount components to the PCB board. In actual production, when the solder paste is applied to the PCB board, it is usually extruded through a soldering head. The head first moves downwards to contact the PCB board, and then moves upwards. During this upward movement, the solder paste is stretched into a thread and then breaks. The stretched solder paste then moves downwards to a pointed point due to its own gravity. However, changes in temperature and humidity can alter the viscosity and extrusion amount of the solder paste, resulting in variations in its thickness. This can lead to defects during placement. To improve product quality, the products processed by the pick-and-place machine are usually inspected. Based on the inspection results, the parameters of the pick-and-place machine are modified to improve the yield rate and prevent defective products from entering the market.

[0004] Existing Chinese patent document CN202110740574.2 discloses an online inspection method, device, equipment, and storage medium for a pick-and-place machine. It detects the bonding quality of the adhesive by using designed adhesive image information and then generates a quality pass instruction, enabling the pick-and-place machine to perform placement according to the pass instruction, thereby improving the yield rate. However, some products, even after bonding, meet the requirement of being welded together, but the weld strength does not meet the requirements. Conventional inspection methods cannot effectively determine this. After customers purchase the products, vibrations or minor bumps can cause damage after a period of use, affecting the product's reputation. Therefore, this solution proposes a quality inspection system and method for pick-and-place machine products. Summary of the Invention

[0005] To address the technical problems mentioned in the background section, this invention provides a quality inspection system and method for surface mount technology (SMT) products. Its advantage lies in its ability to simulate drop tests on PCB boards after SMT assembly, thereby filtering out products with weak solder joints.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0007] A quality inspection system for a pick-and-place machine includes the following process:

[0008] S1: Sample the PCB products after they are bonded by the pick-and-place machine, and then assemble the PCB products through the inspection frame to simulate the state of installation in the housing;

[0009] S2: The PCB product is dropped from a height using a drop test device to simulate the action of the PCB product when it is dropped from a height;

[0010] Repeat this step multiple times;

[0011] S3: After the test is completed, the personnel remove the PCB product and determine whether there is any breakage by taking pictures and analyzing the solder joints of the components on the PCB, thereby achieving quality inspection.

[0012] The present invention is further configured such that the anti-fall detection device includes a platform plate and a protective frame fixed on the platform plate. The platform plate has a cross opening, and push devices for clamping the detection frame are installed at both ends of the cross opening, and lifting devices for moving the detection frame upward are installed at the other two ends.

[0013] Through the above technical solutions, the designed drop detection device can simulate a product falling from a height, thereby determining in advance whether the product has been damaged after the fall, improving the authenticity of quality inspection, and preventing defective products from entering the market.

[0014] The present invention is further configured such that the lifting device includes two threaded rods rotatably mounted on the platform plate, a movable plate is sleeved on the outer side of the two threaded rods, and a driving component is installed at the bottom of the two threaded rods. A docking plate that fits against the detection frame is fixed at the outer end of the movable plate, and a reset component is installed inside the movable plate. A movable stage is fixed through the reset component. The movable stage slides through the cross opening and docks with the pushing device. An opening is provided inside the movable plate, and the threaded rods are sleeved through the opening. An arc-shaped plate is fixed at the outer end of the opening. A threaded groove adapted to the threaded rods is engraved on the inner side of the arc-shaped plate.

[0015] The driving component includes a drive motor fixed to the bottom of the platform plate by a motor frame. The output end of the drive motor is fixed to the bottom of one of the threaded rods by a coupling. Both threaded rods have drive gears fixed to their outer bottom ends. The outer sides of the two drive gears are fitted with toothed belts.

[0016] The above technical solution involves a designed driving component that provides power to rotate two threaded rods, thereby causing the arc-shaped plate and the moving plate to move upward, which in turn causes the mating plate to move upward and simultaneously causes the detection frame to move upward.

[0017] The present invention is further configured such that the reset member includes a connecting rod that slides through the moving plate, the bottom of the connecting rod is fixed to the outer wall of the moving platform, and a reset spring for pushing the moving plate downward is sleeved on the outer side of the connecting rod.

[0018] Through the above technical solution, the reset component enables the moving plate to move down to abut against the moving table when the arc plate disengages from the threaded rod, facilitating the next lifting operation of the detection frame.

[0019] The present invention is further configured such that the pushing device includes a bidirectional lead screw, a first pushing plate, and a second pushing plate. The first pushing plate and the second pushing plate are slidably connected to the inner walls of both ends of the cross-shaped opening, and the bottom ends of the first pushing plate and the second pushing plate are threadedly connected to both ends of the bidirectional lead screw. The two ends of the bidirectional lead screw are rotatably connected to the bottom of the platform plate through bearing seats, and a first bevel gear is fixed to the outer side of the bidirectional lead screw. Lead screws are threaded into the bottom of both moving platforms, and the two ends of both lead screws are rotatably connected to the bottom of the platform plate through bearing seats. A second bevel gear that meshes with the first bevel gear is fixed to the outer side of both lead screws. A pushing motor is fixed to the bottom of the platform plate through a motor frame, and the output end of the pushing motor is fixedly connected to one end of the bidirectional lead screw through a coupling.

[0020] The above technical solution involves rotating a designed push motor, which drives a bidirectional lead screw to rotate, causing push plate one and push plate two to move synchronously in opposite directions within the cross joint. Simultaneously, the meshing of bevel gear one and bevel gear two causes the two bevel gears to rotate synchronously in reverse, which in turn causes the two lead screws to rotate synchronously in reverse, thus enabling the two moving stages to move synchronously in opposite directions to satisfy the clamping of the detection frame.

[0021] The invention is further configured such that a flipping component is installed on the outer side of the push plate, the push plate is Z-shaped, and a flipping plate is rotatably mounted on the push plate. An arc-shaped rod is fixed on the outer side of the flipping plate, and a limiting ball is fixed at the outer end of the arc-shaped rod. An arc-shaped tension spring is sleeved on the outer side of the arc-shaped rod and fixed to the push plate and the limiting ball. A limiting component that abuts against the flipping plate is installed at the bottom of the platform plate. A mating interface is opened in the docking plate, and a docking post that matches the mating interface is fixed on the outer side of the detection frame.

[0022] Through the above technical solutions, the flipping component can satisfy the flipping of the detection frame, making the falling state more random.

[0023] The present invention is further configured such that the limiting member includes a mounting plate fixed to the bottom of the platform plate, a limiting rod slidably inserted into the mounting plate and abutting against the outer side of the flip plate, an adjusting plate fixed to the outer end of the limiting rod, and an adjusting rod slidably inserted into the adjusting plate, the two ends of the adjusting rod being fixed to the bottom of the platform plate by fixing blocks, and a compression spring for pushing the adjusting plate outward is sleeved on the outer side of the adjusting rod, one end of the cross opening has two insertion ports, and a push plate that inserts into the insertion ports is fixed to the bottom of the moving plate, the push plate being in contact with the outer side of the adjusting plate.

[0024] Through the above technical solution: the limiting component mainly limits the flip plate, so that when it moves with the push plate, it can drive the flip plate to abut against the outside of the detection frame.

[0025] The invention is further configured such that the detection frame is a cube-shaped frame, and a docking post is fixed at the center point of each face. The detection frame includes a frame body and a frame cover. The frame cover is connected to the frame body by bolts. A connecting plate is fixed at the bottom of the frame body and inside the frame cover. A plug-in rod is fixed on the connecting plate at the bottom of the frame body. The plug-in rod is plugged into a hole on the PCB board. The connecting plate on the frame cover is connected to the top of the plug-in rod by bolts. The plug-in rod has an elongated opening, and a positioning component for positioning multiple PCB boards is installed in the elongated opening.

[0026] Through the above technical solutions, the designed detection framework can simulate the installation of the PCB board inside the housing, thus making the detection more realistic.

[0027] The present invention is further configured such that the positioning member includes a positioning rod that slides through a long opening, a prismatic rod is fixed to the outer end of the positioning rod, and a locking plate is fixed to the other end of the positioning rod, a semi-circular sleeve that fits against the outer wall of the insertion rod is slidably sleeved on the outer side of the positioning rod, and a push-tightening spring that abuts against the semi-circular sleeve and the prismatic rod is sleeved on the outer side of the positioning rod, a plurality of limiting grooves are opened on one side of the insertion rod, and a limiting block that matches the limiting groove is fixed inside the semi-circular sleeve, and a locking slot that matches the locking plate is opened on the other side.

[0028] The above technical solutions, including the design of the positioning components, make the installation of multiple PCB boards more convenient.

[0029] A quality inspection method for products used in a pick-and-place machine includes the following steps:

[0030] Step 1: Personnel extract multiple PCB boards according to the sampling requirements and insert them onto the plug-in rods in sequence. The boards are then installed on the plug-in rods at equal intervals using positioning components. Finally, the frame covers are connected to the frame body to install the PCB boards, and the testing frame is placed on the platform plate.

[0031] Step 2: The testing frame is positioned by the cooperation of the pushing device and the lifting device. Then the testing frame is raised by the lifting device and released to drop the testing frame from a height to conduct drop and shock resistance testing.

[0032] Step 3: After multiple drop tests, the PCB board is disassembled and its solder joints are inspected to determine if there are any cracks.

[0033] The beneficial effects of this invention are as follows:

[0034] 1. The detection frame designed in this invention can install multiple PCB boards at one time and simulate the state of the PCB boards installed in the product housing. With the help of the lifting device and the pushing device, the detection frame can be raised and dropped from a height to simulate the action of the product falling. This can detect whether the components on the PCB board are firmly connected after soldering, and prevent some defective products from entering the market.

[0035] 2. The present invention designs a pusher and a lifting device that work together to push and position the detection frame after it has fallen, which facilitates multiple subsequent tests on the detection frame and makes the tests more representative.

[0036] 3. The flipping component designed in this invention can push and flip the detection frame when it moves up a certain distance, so that the grounding angle of the detection frame is different when it is dropped multiple times, which can better simulate the state of product falling and make the detection effect better. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the anti-fall detection device of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of the present invention after the protective frame has been removed;

[0039] Figure 3 This is a schematic diagram of the overall bottom structure of the present invention;

[0040] Figure 4 This is a schematic diagram showing the positional relationship between the pushing device and the lifting device of this invention;

[0041] Figure 5 This is a side view of the pushing device and the lifting device of the present invention;

[0042] Figure 6 This is a schematic diagram of the pushing device structure at the bottom of the platform plate of the present invention;

[0043] Figure 7 This is a schematic diagram showing the connection relationship between the pushing device and the lifting device of the present invention;

[0044] Figure 8 This is a schematic diagram of the overall structure of the detection frame of the present invention;

[0045] Figure 9 This is a schematic diagram showing the connection between multiple PCB boards and connector rods in this invention;

[0046] Figure 10 This is a schematic diagram showing the positional relationship between the positioning element and the plug rod of the present invention;

[0047] Figure 11 This is a schematic diagram of the positioning component structure of the present invention.

[0048] In the diagram: 1. Platform plate; 2. Protective frame; 3. Cross-shaped opening; 4. Pushing device; 5. Lifting device; 6. Threaded rod; 7. Moving plate; 8. Driving component; 9. Connecting plate; 10. Reset component; 11. Moving stage; 12. Arc plate; 13. Drive motor; 14. Drive gear; 15. Toothed belt; 16. Connecting rod; 17. Reset spring; 18. Double-acting lead screw; 19. Pushing plate one; 20. Pushing plate two; 21. Bevel gear one; 22. Lead screw; 23. Bevel gear two; 24. Pushing motor 25. Flip-over component; 26. Flip-over plate; 27. Arc rod; 28. Arc tension spring; 29. ​​Limiting component; 30. Connecting interface; 31. Connecting column; 32. Mounting plate; 33. Limiting rod; 34. Adjusting plate; 35. Adjusting rod; 36. Compression spring; 37. Insertion port; 38. Push plate; 39. Frame body; 40. Frame cover; 41. Connecting plate; 42. Insertion rod; 43. Long opening; 44. Positioning component; 45. Positioning rod; 46. Clamping plate; 47. Semicircular sleeve; 48. Push spring. Detailed Implementation

[0049] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0050] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same 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 only used to explain this patent, and should not be construed as limiting this patent.

[0051] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent 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 limitations on this patent.

[0052] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0053] Example 1

[0054] A quality inspection system for a pick-and-place machine includes the following process:

[0055] S1: Sample the PCB products after they are bonded by the pick-and-place machine, and then assemble the PCB products through the inspection frame to simulate the state of installation in the housing;

[0056] S2: The PCB product is dropped from a height using a drop test device to simulate the action of the PCB product when it is dropped from a height;

[0057] Repeat this step multiple times;

[0058] S3: After the test is completed, the personnel remove the PCB product and determine whether there is any breakage by taking pictures and analyzing the solder joints of the components on the PCB, thereby achieving quality inspection.

[0059] Reference Figures 1-3 The anti-fall detection device includes a platform plate 1 and a protective frame 2 fixed on the platform plate 1. The platform plate 1 has a cross opening 3, and push devices 4 for clamping the detection frame are installed at both ends of the cross opening 3. Lifting devices 5 for moving the detection frame upward are installed at the other two ends.

[0060] It should be noted that the designed pushing device can position and push the detection frame on the platform plate 1, and then, in conjunction with the lifting device 5, lift the detection frame to conduct a drop test.

[0061] It should also be noted that the designed protective frame 2 can control the drop range of the detection frame, thereby facilitating the subsequent repositioning of the detection frame by the pushing device 4.

[0062] Reference Figures 1-4The lifting device 5 includes two threaded rods 6 rotatably mounted on the platform plate 1. A movable plate 7 is sleeved on the outside of the two threaded rods 6, and a driving component 8 is installed at the bottom of the two threaded rods 6. A docking plate 9 that fits against the detection frame is fixed at the outer end of the movable plate 7. A reset component 10 is installed inside the movable plate 7, and a movable stage 11 is fixed through the reset component 10. The movable stage 11 slides through the cross 3 and docks with the pushing device 4. An opening is provided inside the movable plate 7, and the threaded rods 6 are sleeved through the opening. An arc plate 12 is fixed at the outer end of the opening. A threaded groove that matches the threaded rods 6 is engraved on the inner side of the arc plate 12.

[0063] The drive unit 8 includes a drive motor 13 fixed to the bottom of the platform plate 1 by a motor frame. The output end of the drive motor 13 is fixed to the bottom of one of the threaded rods 6 by a coupling. Both threaded rods 6 have drive gears 14 fixed to their outer bottom ends. The outer sides of the two drive gears 14 are fitted with toothed belts 15.

[0064] It should be noted that the designed drive motor 13 drives one of the threaded rods 6 to rotate, and with the action of the drive gear 14 and toothed belt 15, the two threaded rods 6 rotate synchronously. This causes the arc plate 12, which is in thread contact with the threaded rod 6, to move upward with the rotation of the threaded rod 6, driving the moving plate 7 and the docking plate 9 to move upward. This allows the detection frame held by the docking plate 9 to rise to a certain height. Subsequently, by opening the push component 4, the moving stage 11 and the docking plate 9 move outward, thereby releasing the detection frame and realizing the automatic drop operation.

[0065] Please refer to Figure 5 The reset component 10 shown in the figure includes a connecting rod 16 that slides through the moving plate 7. The bottom of the connecting rod 16 is fixed to the outer wall of the moving platform 11, and a reset spring 17 for pushing the moving plate 7 downward is sleeved on the outside of the connecting rod 16.

[0066] It should be noted that after the docking plate 9 is disengaged from the detection frame as the moving stage 11 is opened, the reset spring 17 can move the docking plate 9 back to its initial position, which facilitates the lifting of the detection frame next time.

[0067] Additionally, please refer to Figure 6 and Figure 7The pushing device 4 shown in the figure includes a bidirectional lead screw 18, a first pushing plate 19, and a second pushing plate 20. The first pushing plate 19 and the second pushing plate 20 are slidably connected to the inner walls of both ends of the cross 3, and the bottom ends of the first pushing plate 19 and the second pushing plate 20 are threadedly connected to both ends of the bidirectional lead screw 18. The two ends of the bidirectional lead screw 18 are rotatably connected to the bottom of the platform plate 1 through bearing seats, and a bevel gear 21 is fixed on the outer side of the bidirectional lead screw 18. The bottom of the two moving tables 11 are threadedly connected to lead screws 22, and the two ends of the two lead screws 22 are rotatably connected to the bottom of the platform plate 1 through bearing seats. A bevel gear 23 that meshes with the bevel gear 21 is fixed on the outer side of the two lead screws 22. A pushing motor 24 is fixed to the bottom of the platform plate 1 through a motor frame, and the output end of the pushing motor 24 is fixedly connected to one end of the bidirectional lead screw 18 through a coupling.

[0068] It should be noted that: the rotation of the push motor 24 drives the bidirectional lead screw 18 to rotate, which causes the first bevel gear 21 to rotate, which in turn drives the two second bevel gears 23 to rotate synchronously in opposite directions. This allows the first push plate 19, the second push plate 20, and the two moving stages 11 to move synchronously inward or outward within the cross 3, thus completing the positioning and clamping of the detection frame and the subsequent opening action.

[0069] Additionally, please see Figure 8 Figure 10 The detection frame shown in the figure is a cube-shaped frame, and a docking post 31 is fixed at the center point of each face. The detection frame includes a frame body 39 and a frame cover 40. The frame cover 40 is connected to the frame body 39 by bolts. A connecting plate 41 is fixed at the bottom of the frame body 39 and inside the frame cover 40. A plug-in rod 42 is fixed on the connecting plate 41 at the bottom of the frame body 39. The plug-in rod 42 is plugged into the plug hole on the PCB board. The connecting plate 41 on the frame cover 40 is connected to the top of the plug-in rod 42 by bolts. The plug-in rod 42 has an elongated opening 43, and a positioning component 44 for positioning multiple PCB boards is installed inside the elongated opening 43.

[0070] It should be noted that when installing the PCB board, first open the frame cover 40, then align the holes on multiple PCB boards with the plug rods 42 and insert them, and limit them with the positioning piece 44. After installing multiple PCB boards in sequence, fix the frame cover 40 to the frame body 39 with screws, thereby simulating the state of the PCB board installed in the product housing. Multiple PCB boards can be dropped at one time, which is more efficient.

[0071] It should also be noted that the detection frame is designed in the shape of a cube, so that when it is clamped after each drop, the distance moved by the push plate 19, the push plate 20 and the two moving platforms 11 is the same.

[0072] The method for testing the soldering firmness of components on a PCB board is as follows: First, personnel insert the randomly selected PCB boards into the insertion rods 42 inside the frame body 39. Then, the PCB boards are fixed to the insertion rods 42 using positioning parts 44. After that, the frame cover 40 is closed by bolt connection. During testing, the push motor 24 drives the bidirectional lead screw 18 to rotate, which in turn drives the first bevel gear 21 to rotate, driving the second bevel gear 23 to rotate, thereby causing the lead screw 22 to rotate. This drives the two moving stages 11 and the first and second push plates 19 and 20 to move, pressing and clamping the outer side of the testing frame for positioning. Then, the drive motor 13 rotates, causing the threaded rod 6 to rotate. When the moving stage 11 moves... This causes the movable plate 7 to move and the arc plate 12 to fit tightly against the threaded rod 6. When the threaded rod 6 rotates, the movable plate 7 moves upward, cooperating with the docking plate 9 to lift the detection frame. After moving to the designated height, the push motor 24 reverses, causing the two movable stages 11 and push plates 19 and 20 to retract within the cross 3. At this time, the docking plate 9 is driven to detach from the detection frame, so that the detection frame has no support and performs a free fall from a height, falling onto the platform plate 1. After multiple falls, the PCB board is removed, and personnel take pictures of the component solder joints and analyze the images to check for cracks, thereby detecting the solder joint strength of the components on the PCB board.

[0073] This solution provides a quality inspection method for a pick-and-place machine product, comprising the following steps:

[0074] Step 1: Personnel extract multiple PCB boards according to the sampling requirements and insert them onto the plug-in rod 42 in sequence. The PCB boards are then installed on the plug-in rod 42 at equal intervals by the positioning piece 44. The frame cover 40 is then connected to the frame body 39 to complete the installation of the PCB boards. The test frame is then placed on the platform plate 1.

[0075] Step 2: The testing frame is positioned by the cooperation of the pushing device 4 and the lifting device 5. Then the lifting device 5 is used to lift the testing frame and release it to make the testing frame fall from a height to carry out the drop and shock resistance test.

[0076] Step 3: After multiple drop tests, the PCB board is disassembled and its solder joints are inspected to determine if there are any cracks.

[0077] Example 2

[0078] Reference Figure 6 and Figure 7As shown, this embodiment further illustrates Example 1. A flipping member 25 is installed on the outer side of the push plate 19 in the figure. The push plate 19 is Z-shaped, and a flipping plate 26 is rotatably installed on the push plate 19. An arc-shaped rod 27 is fixed on the outer side of the flipping plate 26, and a limit ball is fixed at the outer end of the arc-shaped rod 27. An arc-shaped tension spring 28 is sleeved on the outer side of the arc-shaped rod 27 and is fixed to the push plate 19 and the limit ball. A limit member 29 that abuts against the flipping plate 26 is installed at the bottom of the platform plate 1. A mating interface 30 is opened in the mating plate 9, and a mating post 31 that is adapted to the mating interface 30 is fixed on the outer side of the detection frame.

[0079] It should be noted that: when the flip plate 26 is not blocked by the limiting member 29, the designed arc-shaped tension spring 28 can pull the limiting ball at the end of the arc-shaped rod 27, so that the flip plate 26 can be pressed down towards the bottom of the detection frame, so that the detection frame can rotate between the two docking plates 9, resulting in different contact surfaces with the ground after subsequent drop.

[0080] It should also be noted that: an interface 30 is opened on the docking plate 9 and is sleeved with the docking post 31 on the outside of the detection frame. This allows the detection frame to rotate and swing around the two docking posts 31 as the rotation axis when the flipping plate 26 moves the bottom of the detection frame. This results in the surface that docks with the platform plate 1 being different during subsequent drops, making the orientation of the detection frame uncertain during drops. This simulates the real drop process and improves the realism of the detection.

[0081] Reference Figure 7 The limiting component 29 includes a mounting plate 32 fixed to the bottom of the platform plate 1. A limiting rod 33 that abuts against the outer side of the flip plate 26 is slidably inserted into the mounting plate 32. An adjusting plate 34 is fixed to the outer end of the limiting rod 33. An adjusting rod 35 is slidably inserted into the adjusting plate 34. Both ends of the adjusting rod 35 are fixed to the bottom of the platform plate 1 by fixing blocks. A compression spring 36 that pushes the adjusting plate 34 outward is sleeved on the outer side of the adjusting rod 35. Two insertion ports 37 are opened at one end of the cross 3. A push plate 38 that is inserted into the insertion ports 37 is fixed to the bottom of the moving plate 7. The push plate 38 is in contact with the outer side of the adjusting plate 34.

[0082] It should be noted that the shape of the push plate 38 fixed at the bottom of the movable plate 7 is as follows: Figure 7 As shown, it resembles an L-shape, with one part sliding in contact with the inner wall of the cross 3 and the other end abutting against the adjusting plate 34. When the moving plate 7 moves upward, the push plate 38 will first disengage from the adjusting plate 34 and then pass through the insertion port 37. When disengaging from the adjusting plate 34, under the action of the compression spring 36, the adjusting plate 34 and the limiting rod 33 will be pushed outward, thereby causing the limiting rod 33 to disengage from the cross 3 and not abut against the outer side of the flip plate 26. As a result, the outer end of the flip plate 26 will be moved against the bottom of the detection frame, causing it to detect rotation and swing.

[0083] It should also be noted that: under the action of the pushing device 4, the moving stage 11 moves back within the cross 3, thereby driving the moving plate 7 to move back. Then, under the action of the reset member 10, the moving plate 7 moves down to the initial position. At this time, the push plate 38 at the bottom of the moving plate 7 moves down with the moving plate 7 and passes through another insertion port 37, moving to the outside of the adjustment plate 34. Then, when pushing and clamping, the push plate 38 pushes the adjustment plate 34 first, so that the limit rod 33 first limits the cross 3, so that when the subsequent flip plate 26 moves to that position, it can be blocked. Then, as the pushing plate 19 continues to move, the flip plate 26 is in a charging state, which is convenient for the subsequent turning and flipping of the detection frame.

[0084] The method for rotating and swinging the detection frame is as follows: First, the detection frame is lifted a certain distance. Then, the push plate 38 is disengaged from the adjustment plate 34. Under the action of the compression spring 36, the limit rod 33 is disengaged from the cross 3, thereby causing the flip plate 26 to move the detection frame. With the design of the docking column 31 and the docking interface 30, the detection frame can rotate and swing, which facilitates the contact of different surfaces with the ground when it is dropped, thus improving the authenticity of the detection.

[0085] Example 3

[0086] Reference Figure 10 and Figure 11 As shown, this embodiment further illustrates Example 1. The positioning member 44 in the figure includes a positioning rod 45 that slides through the long opening 43. A prismatic rod is fixed to the outer end of the positioning rod 45, and a clamping plate 46 is fixed to the other end. A semi-circular sleeve 47 that fits against the outer wall of the insertion rod 42 is slidably sleeved on the outer side of the positioning rod 45, and a push-tightening spring 48 that abuts against the semi-circular sleeve 47 and the prismatic rod is sleeved on the outer side of the positioning rod 45. A plurality of limiting grooves are opened on one side of the insertion rod 42, and a limiting block that matches the limiting groove is fixed inside the semi-circular sleeve 47. Another slot that matches the clamping plate 46 is opened.

[0087] It should be noted that when positioning, the operator only needs to align the card plate 46 with the long opening 43 and insert it, then make the semi-circular sleeve 47 fit with the insertion rod 42 and make the limit card engage with the limit groove. Then, the operator rotates the positioning rod 45 until the card plate 46 and the slot are in the same direction, and then releases it. Under the action of the push spring 48, the card plate 46 engages with the slot, thus achieving the positioning of the PCB board. The installation within the detection frame is convenient and easy.

[0088] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A quality inspection system for chip mounter products, characterized in that, The process includes the following steps: S1: Sample the PCB products after they are bonded by the pick-and-place machine, and then assemble the PCB products through the inspection frame to simulate the state of installation in the housing; S2: The PCB product is dropped from a height using a drop test device to simulate the action of the PCB product when it is dropped from a height; Repeat this step multiple times; S3: After the test is completed, the personnel remove the PCB product and determine whether there is any breakage by taking pictures and analyzing the solder joints of the components on the PCB, thereby achieving quality inspection; The anti-fall detection device includes a platform plate (1) and a protective frame (2) fixed on the platform plate (1). The platform plate (1) has a cross opening (3), and push devices (4) for clamping the detection frame are installed at both ends of the cross opening (3). Lifting devices (5) for moving the detection frame are installed at the other two ends. The lifting device (5) includes two threaded rods (6) rotatably mounted on the platform plate (1). A movable plate (7) is sleeved on the outside of the two threaded rods (6), and a driving component (8) is installed at the bottom of the two threaded rods (6). A docking plate (9) that fits against the detection frame is fixed at the outer end of the movable plate (7), and a drive component (8) is installed inside the movable plate (7). A reset component (10) is provided, and a moving platform (11) is fixed to the reset component (10). The moving platform (11) slides through the cross (3) and docks with the pushing device (4). The moving plate (7) has an opening and is fitted onto the outside of the threaded rod (6) through the opening. An arc plate (12) is fixed to the outer end of the opening. The inner side of the arc plate (12) is engraved with a threaded groove that matches the threaded rod (6). The driving component (8) includes a driving motor (13) fixed to the bottom of the platform plate (1) by a motor frame. The output end of the driving motor (13) is fixed to the bottom of one of the threaded rods (6) through a coupling. A driving gear (1) is fixed to the outer side of the bottom end of both threaded rods (6). 4), the two drive gears (14) are meshed with toothed belts (15) on their outer sides, the reset member (10) includes a connecting rod (16) that slides through the moving plate (7), the bottom of the connecting rod (16) is fixed to the outer wall of the moving platform (11), and the outer side of the connecting rod (16) is fitted with a reset spring (17) for pushing the moving plate (7) down, the pushing device (4) includes a bidirectional lead screw (18), a first pushing plate (19) and a second pushing plate (20), the first pushing plate (19) and the second pushing plate (20) are slidably connected to the inner walls of both ends of the cross (3), and the bottom ends of the first pushing plate (19) and the second pushing plate (20) are respectively connected to the bidirectional lead screw (18). 18) The two ends of the double-ended lead screw (18) are connected by threads. The two ends of the double-ended lead screw (18) are rotatably connected to the bottom of the platform plate (1) through bearing seats. A bevel gear (21) is fixed on the outside of the double-ended lead screw (18). The bottom of the two moving tables (11) are threaded with lead screws (22). The two ends of the two lead screws (22) are rotatably connected to the bottom of the platform plate (1) through bearing seats. A bevel gear (23) that meshes with the bevel gear (21) is fixed on the outside of the two lead screws (22). A push motor (24) is fixed on the bottom of the platform plate (1) through a motor frame. The output end of the push motor (24) is fixedly connected to one end of the double-ended lead screw (18) through a coupling.

2. The quality inspection system for a chip mounter product according to claim 1, characterized in that, A flipping component (25) is installed on the outer side of the push plate (19). The push plate (19) is Z-shaped, and a flipping plate (26) is rotatably installed on the push plate (19). An arc-shaped rod (27) is fixed on the outer side of the flipping plate (26), and a limiting ball is fixed at the outer end of the arc-shaped rod (27). An arc-shaped tension spring (28) is sleeved on the outer side of the arc-shaped rod (27) and fixed to the push plate (19) and the limiting ball. A limiting component (29) that abuts against the flipping plate (26) is installed at the bottom of the platform plate (1). A mating interface (30) is opened in the docking plate (9), and a docking post (31) that is adapted to the mating interface (30) is fixed on the outer side of the detection frame.

3. The quality inspection system for a chip mounter product according to claim 2, characterized in that, The limiting member (29) includes a mounting plate (32) fixed to the bottom of the platform plate (1). A limiting rod (33) that abuts against the outside of the flip plate (26) is slidably inserted into the mounting plate (32). An adjusting plate (34) is fixed to the outer end of the limiting rod (33). An adjusting rod (35) is slidably inserted into the adjusting plate (34). Both ends of the adjusting rod (35) are fixed to the bottom of the platform plate (1) by fixing blocks. A compression spring (36) that pushes the adjusting plate (34) outward is sleeved on the outside of the adjusting rod (35). Two insertion ports (37) are opened at one end of the cross (3). A push plate (38) that is inserted into the insertion port (37) is fixed to the bottom of the moving plate (7). The push plate (38) is in contact with the outside of the adjusting plate (34).

4. The quality inspection system for a chip mounter product according to claim 1, characterized in that, The detection frame is a cube-shaped frame, and a docking post (31) is fixed at the center point of each face. The detection frame includes a frame body (39) and a frame cover (40). The frame cover (40) is connected to the frame body (39) by bolts. A connecting plate (41) is fixed at the bottom of the frame body (39) and inside the frame cover (40). A plug rod (42) is fixed on the connecting plate (41) at the bottom of the frame body (39). The plug rod (42) is plugged into the socket on the PCB board. The connecting plate (41) on the frame cover (40) is connected to the top of the plug rod (42) by bolts. The plug rod (42) has an elongated opening (43), and a positioning component (44) for positioning multiple PCB boards is installed inside the elongated opening (43).

5. The quality inspection system for a chip mounter product according to claim 4, characterized in that, The positioning component (44) includes a positioning rod (45) that slides through the long opening (43). The outer end of the positioning rod (45) is fixed with a prismatic rod, and the other end is fixed with a clamping plate (46). The outer side of the positioning rod (45) is slidably fitted with a semi-circular sleeve (47) that fits against the outer wall of the plug-in rod (42). The outer side of the positioning rod (45) is fitted with a push-tightening spring (48) that abuts against the semi-circular sleeve (47) and the prismatic rod. The plug-in rod (42) has multiple limiting grooves on one side, and a limiting block that matches the limiting groove is fixed inside the semi-circular sleeve (47). The other side has a clamping slot that matches the clamping plate (46).

6. A quality inspection method for products used in a pick-and-place machine, comprising the quality inspection system for products used in a pick-and-place machine as described in any one of claims 4-5, characterized in that, Includes the following steps: Step 1: Personnel extract multiple PCB boards according to the sampling requirements and insert them into the plug rod (42) in sequence. The plug rod (42) is installed at equal intervals by the positioning piece (44). Then, the frame cover (40) is connected to the frame body (39) to realize the installation of the PCB boards and the test frame is placed on the platform plate (1). Step 2: The detection frame is positioned by the cooperation of the pushing device (4) and the lifting device (5). Then the detection frame is lifted by the lifting device (5) and released to make the detection frame fall from a height for shock and drop test. Step 3: After multiple drop tests, the PCB board is disassembled and its solder joints are inspected to determine if there are any cracks.

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