An automatic defect detection tooling for automotive OBC control boards

Abstract

This invention discloses an automatic defect detection fixture for automotive OBC control boards, belonging to the technical field of detection devices. It includes a base plate with a first drive motor mounted on it. Fixed blocks are positioned on both sides of the base plate near the first drive motor. A rotating shaft is rotatably mounted on the opposing surfaces of the two fixed blocks, and a conveyor belt is tensioned and sleeved on the rotating shaft. This invention integrates a conveyor belt, a robotic arm, an ejector mechanism, and a laser detector. The conveyor belt carries the movable block and control board for continuous movement. The laser detector scans the control board with the assistance of the ejector mechanism. The robotic arm automatically transfers the defective product to the processing board based on the detection results, which is convenient, fast, and improves detection efficiency. The cooperation between the movable block and the traction component facilitates continuous overall transportation. When the movable block reaches the end, it enters the vertical groove under gravity. After the electric push rod locks the position, the traction component pulls it back to the starting point for the next transportation and inspection operation.

Description

Technical Field

[0001] This invention relates to the field of detection device technology, and in particular to an automatic detection fixture for defects in automotive OBC control boards. Background Technology

[0002] OBC stands for On-Board Charger, which converts external AC power into DC power to charge the vehicle's battery. Its control board is an important component of the vehicle's electronic control system, integrating a variety of electronic components and circuits.

[0003] Before leaving the factory, the OBC control board needs to be inspected for appearance defects, solder joints, and foreign objects on its surface. Existing inspection equipment, which uses laser inspection devices, can perform detailed surface inspections during the inspection process. However, if a problem is found, the control board cannot be transported externally for remediation, and continuous inspection of the control board is not possible.

[0004] Therefore, we propose an automatic defect detection tooling for automotive OBC control boards. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention provides an automatic defect detection tooling for automotive OBC control boards, which overcomes the shortcomings of the prior art and aims to solve the problems in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic defect detection fixture for an automotive OBC control board, comprising a base plate, a first drive motor mounted on the base plate, fixed blocks mounted on both sides of the first drive motor on the base plate, a rotating shaft rotatably mounted on the opposing surfaces of the two fixed blocks, a conveyor belt tensioned and sleeved on the rotating shaft, a bottom block welded between the two fixed blocks, an ejection mechanism mounted on the bottom block, frames welded to both ends of the fixed blocks, a laser detector fixedly mounted on the frames, a vertical plate mounted on the base plate outside the two fixed blocks, a traction assembly slidably mounted on the vertical plate, a movable block abutting against the upper surface of the conveyor belt, a support assembly mounted on the movable block, a robotic arm mounted on the base plate, a first connecting plate mounted at the output end of the robotic arm, clamping blocks movably mounted on both sides of the first connecting plate, an auxiliary processing table mounted on the base plate, and a processing assembly mounted on the auxiliary processing table.

[0007] In a preferred embodiment, the present invention can be further configured as follows: the ejection mechanism includes a plurality of second electric telescopic mechanisms evenly distributed in the gap of the conveyor belt, the bottom of each of the second electric telescopic mechanisms is fixedly connected to the bottom block, the telescopic end of the second electric telescopic mechanism is equipped with a top plate, the length of the top plate is greater than the length of the bearing plate, and both ends of the top plate are provided with upward deflection limiting buckles, and the initial position of the top plate is lower than the top of the fixed block.

[0008] In a preferred embodiment, the present invention can be further configured such that the frame extends directly above the top plate, and the laser detector is positioned at the center of the top plate.

[0009] In a preferred embodiment, the present invention can be further configured as follows: the supporting component includes a mounting block disposed on the top of the movable block, a rotating rod rotatably disposed within the mounting block, a rotating column sleeved on the rotating rod, a movable rod fixedly connected to the rotating column, the end of the movable rod being fixedly connected to a second connecting plate, a locking block disposed on one side of the movable block, and a connecting end disposed at the bottom of the movable block.

[0010] In a preferred embodiment, the present invention may be further configured such that: the traction assembly includes a sliding groove formed on the surface of the vertical plate, a slider is slidably connected in the sliding groove, a first electric telescopic mechanism is mounted on the slider, and the output end of the first electric telescopic mechanism has a circular hole adapted to the connecting end.

[0011] In a preferred embodiment, the present invention can be further configured as follows: a plurality of protrusions are evenly arranged on both sides of the fixed block, a movable groove is formed between the protrusions, a vertical groove is connected below the movable groove, a rubber pad is provided on one side wall of the vertical groove, an electric push rod is provided on the other side wall, the width of the vertical groove is the same as the width of the movable block, and the width of the movable groove is the same as the height of the locking block.

[0012] In a preferred embodiment, the present invention can be further configured as follows: the processing component includes a fixed base disposed on an auxiliary processing table, the fixed base having a first moving groove and a second moving groove, a processing plate disposed below the first moving groove, the processing plate having a groove, a second moving block slidably disposed in the second moving groove, a cutting disc movably disposed on the second moving block, and a first moving block with a wiping cloth slidably disposed in the first moving groove.

[0013] In a preferred embodiment, the present invention can be further configured as follows: a mounting plate is provided on the second movable block, and a horizontal plate is connected through the mounting plate; a third drive motor is mounted on the horizontal plate; a movable plate is sleeved on the output shaft of the third drive motor; a guard plate is provided on the movable plate; a second drive motor is provided at one end of the guard plate; and the output shaft of the second drive motor extends to the other side of the guard plate and is connected to the cutting disc.

[0014] In a preferred embodiment, the present invention can be further configured such that: a limiting groove is formed on the upper surface of the fixing block, and a limiting block adapted to the limiting groove is provided at the bottom of the tray.

[0015] In a preferred embodiment, the invention can be further configured such that the range of motion of the robotic arm covers the entire conveyor belt and the auxiliary processing table.

[0016] The beneficial effects of this invention are:

[0017] This invention integrates a conveyor belt, a robotic arm, an ejection mechanism, and a laser detector to automate the inspection of the control board. The conveyor belt carries the movable block and the control board in continuous movement, while the laser detector performs multi-dimensional scanning of the control board with the assistance of the ejection mechanism. The robotic arm then automatically transports the defective product to the repair station based on the inspection results, completing the entire inspection process. This is convenient, fast, and improves inspection efficiency.

[0018] The coordination between the movable block and the traction component facilitates continuous overall transportation. When the movable block moves to the end, it enters the vertical groove by gravity. After the electric push rod locks the position, the traction component pulls it back to the starting point for the next transportation and inspection operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall main structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall left-side structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the overall right-side structure of the present invention;

[0022] Figure 4 For the present invention Figure 1 Schematic diagram of the structure at point A in the middle;

[0023] Figure 5 For the present invention Figure 2 Schematic diagram of the structure at point B;

[0024] Figure 6 For the present invention Figure 2 Schematic diagram of the structure at point C;

[0025] Figure 7 For the present invention Figure 2 Schematic diagram of the structure at point D;

[0026] Figure 8 This is a schematic diagram of the second electric telescopic mechanism of the present invention;

[0027] Figure 9 This is a schematic diagram of the main structure of the active block of the present invention;

[0028] Figure 10 This is a bottom view of the movable block structure of the present invention;

[0029] Figure 11 This is a schematic diagram of the main structure of the mounting block of the present invention;

[0030] Figure 12 This is a schematic diagram of the vertical plate structure of the present invention;

[0031] Figure 13 This is a schematic diagram of the movable plate structure of the present invention;

[0032] Figure 14 This is a schematic diagram of the auxiliary processing table structure of the present invention;

[0033] Figure 15 This is a schematic diagram of the ejection mechanism of the present invention.

[0034] In the diagram: 1. Base plate; 2. First drive motor; 3. Base block; 4. Frame; 5. Fixing block; 6. Conveyor belt; 7. Laser detector; 8. Vertical plate; 9. Auxiliary processing table; 10. Carrying plate; 11. Movable block; 12. Robotic arm; 13. First connecting plate; 14. First fixing plate; 15. Synchronous belt; 16. First rotating sleeve; 17. Second rotating sleeve; 18. Rotating shaft; 19. Second fixing plate; 20. Protrusion; 21. Movable groove; 22. Rubber pad; 23. Electric push rod; 24. Vertical groove; 25. Mounting block; 26. Second connecting plate; 27. Limiting groove; 28. Support plate; 29. ​​Limiting block; 30. Locking block; 31. 32. Connecting end; 33. Movable rod; 34. Rotating rod; 35. Rotating column; 36. Sliding groove; 37. Sliding block; 38. First electric telescopic mechanism; 39. Round hole; 40. Fixed seat; 41. First moving groove; 42. Second moving groove; 43. Second moving block; 44. Mounting plate; 45. Horizontal plate; 46. Processing plate; 47. First moving block; 48. Groove; 49. Second drive motor; 50. Guard plate; 51. Cutting disc; 52. Movable plate; 53. Third drive motor; 54. Control box; 55. First fixed column; 56. Clamping block; 57. Second electric telescopic mechanism; 58. Top plate; 59. Limit buckle. Detailed Implementation

[0035] 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.

[0036] Please see Figures 1-15An automatic defect detection fixture for an automotive OBC control board includes a base plate 1, on which a first drive motor 2 is mounted. Fixing blocks 5 are located on both sides of the first drive motor 2 on the base plate 1. A first fixing plate 14 and a second fixing plate 19 are threaded onto both ends of the fixing blocks 5, respectively. A rotating shaft 18 is provided through the opposite surfaces of the two fixing blocks 5. A conveyor belt 6 is tensioned and sleeved on the rotating shaft 18. A bottom block 3 is welded between the two fixing blocks 5. An ejection mechanism is provided on the bottom block 3. A frame 4 is welded to both ends of the fixing blocks 5. A laser detector 7 is fixedly mounted on the frame 4.

[0037] The bottom of the fixing block 5 is provided with a support rod, which is welded and fixed to the base plate 1 and the fixing block 5. The ejection mechanism is provided on the base block 3, and there are three base blocks 3. Each base block 3 is provided with a second electric telescopic mechanism 57. The end of the second electric telescopic mechanism 57 is equipped with a top plate 58. Both ends of the top plate 58 are provided with upward deflection limit buckles 59.

[0038] Furthermore, the initial position of the top plate 58 is set lower than the top of the fixed block 5. In particular, the ejection mechanisms are evenly arranged between the conveyor belts 6, and the length between two adjacent ejection mechanisms is equal.

[0039] The frame 4 is set at both ends of the fixed block 5, and the frame 4 extends above the top plate 58 on both sides, and the laser detector 7 is also set above the top plate 58.

[0040] A vertical plate 8 is provided on the outside of the two fixed blocks 5 on the base plate 1. A traction component is slidably provided on the vertical plate 8. A movable block 11 is abutted on the upper surface of the conveyor belt 6. A support component is provided on the movable block 11.

[0041] The support assembly includes a mounting block 25 on the top of the movable block 11. A movable cavity is opened in the middle of the mounting block 25. Rotating rods 33 are mounted on both sides of the movable cavity through couplings. A rotating column 34 is rotatably sleeved on the rotating rod 33. A movable rod 32 is provided at one end of the rotating column 34. A second connecting plate 26 is welded on the movable rod 32. A support plate 28 is integrally formed on the second connecting plate 26. A bearing plate 10 is placed between the two support plates 28. The OBC control board to be tested is placed on the bearing plate 10.

[0042] The pallet 28 and the second connecting plate 26 are integrally formed. The movable block 11 is L-shaped. A locking block 30 is provided on one side of the movable block 11. A connecting end 31 is provided at the bottom of the movable block 11. The locking block 30 is located below the pallet 28, and the connecting end 31 is located below the mounting block 25.

[0043] Furthermore, the support plate 10 is adapted to the top plate 58, and the length of the top plate 58 is set to be greater than the length of the support plate 10. The support plate 10 is driven to rise by the ejection mechanism and approach the laser detector 7 to perform laser scanning detection and scan the OBC control board.

[0044] A robotic arm 12 is also provided on the base plate 1. The robotic arm 12 is located outside the vertical plate 8 and does not contact the vertical plate 8. A first connecting plate 13 is provided at the output end of the robotic arm 12. Clamping blocks 56 are movably provided on both sides of the first connecting plate 13.

[0045] The output end of the robotic arm 12 is threadedly connected to the first connecting plate 13. The first connecting plate 13 has first fixing posts 54 threadedly installed on both sides. The outside of the first fixing posts 54 can be threadedly installed with second fixing posts 55. The outside of the first fixing posts 54 or the second fixing posts 55 is threadedly installed with clamping blocks 56. The middle of the clamping block 56 is set with a clamping plate according to the bearing plate 10 to ensure that the bearing plate 10 does not slip when clamping it.

[0046] An auxiliary processing table 9 is also provided on the base plate 1. The auxiliary processing table 9 is equipped with processing components. The range of motion of the robotic arm 12 includes the entire section of the conveyor belt 6 and the entire range of the auxiliary processing table 9.

[0047] The auxiliary processing table 9 is welded and fixed to the base plate 1. The auxiliary processing table 9 is placed on the side away from the first drive motor 2, so that the robotic arm 12 can transfer the carrier plate 10.

[0048] The processing assembly includes a fixed base 39 mounted on an auxiliary processing table 9. A first moving groove 40 is formed on the side wall of the fixed base 39, and a second moving groove 41 is formed on the top of the fixed base 39. A processing plate 45 is welded to the fixed base 39 below the first moving groove 40. A groove 47 is formed on the upper surface of the processing plate 45, and the groove 47 is adapted to the support plate 10. A second moving block 42 is slidably arranged in the second moving groove 41, and a cutting disc 50 is movably arranged on the second moving block 42. A first moving block 46 is slidably arranged in the first moving groove 40, and the first moving block 46 extends above the groove 47. A wiping cloth is provided on the lower surface of the first moving block 46, and the wiping cloth abuts against the upper surface of the processing plate 45.

[0049] A mounting plate 43 is welded to one side of the second moving block 42. A horizontal plate 44 is welded to the mounting plate 43. A third drive motor 52 is threaded onto the end of the horizontal plate 44. A movable plate 51 is sleeved on the output end of the third drive motor 52. A guard plate 49 is fixedly installed on the movable plate 51. A second drive motor 48 is threaded onto one side of the guard plate 49. The output shaft of the second drive motor 48 extends to the other side of the guard plate 49 and is connected to the cutting disc 50.

[0050] A control box 53 is also threadedly installed on one side of the horizontal plate 44.

[0051] The angle of the movable plate 51 is controlled by the third drive motor 52, thereby adjusting the height of the cutting disc 50 so that the cutting disc 50 is close to the groove 47.

[0052] The first drive motor 2 is disposed on one side of the first fixed plate 14. The first fixed plate 14 is welded and fixed to the base plate 1. The output end of the first drive motor 2 passes through the first fixed plate 14 and a first rotating sleeve 16 is fixedly installed at the output end of the first drive motor 2. One end of the rotating shaft 18 extends to the top of the first fixed plate 14 and a second rotating sleeve 17 is fixedly installed thereon. A synchronous belt 15 is tensioned between the second rotating sleeve 17 and the first rotating sleeve 16.

[0053] The first drive motor 2 drives the first rotating sleeve 16 to rotate, which in turn drives the second rotating sleeve 17 to rotate, and the rotation of the second rotating sleeve 17 drives the conveyor belt 6 to work.

[0054] A limiting groove 27 is formed on the upper surface of the fixing block 5. The limiting groove 27 is adapted to the limiting block 29, and the bottom of the limiting block 29 is arc-shaped. The friction between the arc-shaped limiting block 29 and the limiting groove 27 is small, so as to avoid affecting the conveying operation of the conveyor belt 6 to the carrier plate 10.

[0055] The traction assembly includes several sliding grooves 35 formed on the surface of the vertical plate 8 near the conveyor belt 6. A slider 36 is slidably disposed within the sliding grooves 35. A first electric telescopic mechanism 37 is threaded onto the slider 36. A circular hole 38 is formed at the top of the output end of the first electric telescopic mechanism 37, and the circular hole 38 is adapted to a connecting end 31. The connecting end 31 moves into the circular hole 38, and the outer ring of the connecting end 31 abuts against the inner wall of the circular hole 38.

[0056] The fixed block 5 has protrusions 20 on both sides corresponding to the slider 36, and a movable groove 21 is provided between the protrusions 20. The width of the movable groove 21 is the same as the height of the locking block 30, and the locking block 30 slides inside the movable groove 21. Vertical grooves 24 are also provided on both sides of the fixed block 5, and the vertical grooves 24 are connected to the movable grooves 21. The width of the vertical grooves 24 is the same as the width of the movable block 11.

[0057] Rubber pads 22 are provided on the side walls of the vertical groove 24, and an electric push rod 23 is provided on one side of the vertical groove 24. The end of the electric push rod 23 extends into the interior of the vertical groove 24, and the upper surface of the end of the electric push rod 23 is on the same horizontal plane as the lower surface of the movable groove 21.

[0058] Furthermore, when the movable block 11 is pulled by the conveyor belt 6 to move above the vertical groove 24, it falls into the vertical groove 24 due to gravity. The output end of the electric push rod 23 blocks the movable block 11, causing the locking block 30 on the movable block 11 to move to the plane of the movable groove 21. At the same time, the connecting end 31 on the lower surface of the movable block 11 is embedded in the round hole 38 opened in the middle of the output end of the first electric telescopic machine 37. By moving the first electric telescopic machine 37, the movable block 11 is driven to move towards the starting point.

[0059] Specifically, the vertical plate 8 is provided with a first driving component for driving the slider 36 to move, and the fixed base 39 is provided with a second driving component for driving the second moving block 42 and the first moving block 46 to move. Both the first driving component and the second driving component are screw drives.

[0060] When the movable block 11 descends, the movable rod 32, which is rotatably installed inside the mounting block 25, contacts the upper surface of the fixed block 5. Under the influence of gravity, the second connecting plate 26 and the support plate 28 are lifted vertically to avoid collision with the frame 4.

[0061] Working principle:

[0062] The first drive motor 2 drives the first rotating sleeve 16 and the second rotating sleeve 17 to rotate via the synchronous belt 15, thereby driving the rotating shaft 18 to rotate, which in turn drives the conveyor belt 6 to run. By placing the carrier plate 10 on the pallet 28 installed on the movable block 11, the bottom of the pallet 28 and the carrier plate 10 are in contact with the conveyor belt 6, and the carrier plate 10 is moved by the conveyor belt 6 to perform OBC control board detection.

[0063] When the carrier plate 10 moves to the designated position, the first drive motor 2 stops working, the conveyor belt 6 stops, and the ejection mechanism starts. The second electric telescopic mechanism 57 pushes the top plate 58 upward, the top plate 58 contacts the carrier plate 10, and drives the carrier plate 10 upward, bringing it close to the laser detector 7. The laser detector 7 scans and inspects the OBC control board on the carrier plate 10, checking for appearance defects, solder joints, and foreign objects on its surface.

[0064] If a defect is found in the OBC control board, the robotic arm 12 is started, and the clamping block 56 on the first connecting plate 13 at its output end clamps the carrier plate 10 and transfers the carrier plate 10 to the auxiliary processing table 9 for repair.

[0065] If the OBC control board is found to be without problems, the second electric telescopic machine 57 is reset, the first drive motor 2 is restarted, the conveyor belt 6 works, and the OBC control board is moved forward. At the same time, the PCB control board and the carrier plate 10 are taken out by the external gripping device, and the movable block 11 continues to move forward.

[0066] When the movable block 11 moves to the vertical groove 24, it falls into the vertical groove 24 due to gravity. The output end of the electric push rod 23 blocks the movable block 11, causing the locking block 30 on the movable block 11 to move to the plane of the movable groove 21. At the same time, the connecting end 31 on the lower surface of the movable block 11 is embedded in the round hole 38 in the middle of the output end of the first electric telescopic machine 37. By moving the first electric telescopic machine 37, the movable block 11 is moved back to the starting point for easy reset, and the bearing plate 10 is continuously lifted for testing.

[0067] The OBC control board, hereinafter referred to as the control board, is also equipped with a first camera for surface inspection of the control board on the frame 4, and a second camera for capturing the situation above the groove 47 on the surface of the auxiliary processing table 9. The laser detector 7 has a spectral analysis module.

[0068] The method for automatic detection and subsequent processing of control boards uses the automatic detection fixture described above.

[0069] S1. The control board is initially inspected using laser detector 7 to check for scratches, abrasions, and oil stains on its outer surface.

[0070] The laser detector 7 performs a simple, rough scan, and the first camera collects information from the surface of the control board to detect oil stains, scratches, and abrasions.

[0071] S1.01 If there are obvious protrusions on the surface of the control board, or if the camera captures obvious stains, and the system automatically analyzes the data to prove that there is dirt or oil on the surface of the control board, the system controls the robotic arm 12 to intervene and clamp the carrier plate 10 through the clamping component on the clamping block 56 and transfer it to the groove 47 on the processing plate 45. The system also prompts the operator to intervene and manually re-inspect the control board on the carrier plate 10. If there is dirt or oil, the operator selects different cleaning agents to replace the wiping cloth on the lower surface of the first moving block 46. The second drive component drives the first moving block 46 to slide back and forth in the first moving groove 40 to clean the dirt.

[0072] When the robotic arm 12 clamps the carrier plate 10, the ejection mechanism resets, and the second electric telescopic mechanism 57 drives the top plate 58 to move below the fixed block 5 to avoid affecting the rear movable block 11 to drive the other carrier plates 10 for testing.

[0073] S1.01.1 When the second camera on the auxiliary processing table 9 detects foreign objects on the surface, the third drive motor 52 is manually controlled to drive the movable plate 51 to rotate, the cutting disc 50 descends to 0.5mm from the surface of the control plate, the second drive motor 48 drives the cutting disc 50 at 10000rpm to remove metal debris, the first moving block 46 moves back and forth along the first moving groove 40 three times, and the wiping cloth wipes away residual particles.

[0074] S1.02, the laser detector 7, and the first camera, when inspecting the control board screen, set the height of the control board itself to a fixed height with no error. However, when the laser detector 7 continuously scanned the surface of the control board, the height reading changed. Furthermore, the first camera did not detect any oil stains or protrusions on the surface of the control board during information collection. Therefore, it can be concluded that there is a dent on the surface of the control board. The system determines that there are scratches or abrasions on the surface of the control board. The robotic arm 12 clamps the carrier plate 10 and transfers the carrier plate 10 to the processing board 45. The system then notifies the manual re-inspection and repair work to proceed. The area around the scratches is cleaned with a special electronic component cleaner. After drying, an electronic device touch-up paint pen or a special repair agent with a color similar to the surface of the control board is used for repair.

[0075] S1.03. After wiping or repairing the control board, place the control board and the carrier plate 10 back on the movable block 11, and send them back to the laser detector 7 via the conveyor belt 6 for re-inspection:

[0076] The ejection mechanism moves the support plate 10 back below the laser detector 7 for a second round of oil stain and scratch inspection. If no defects are found, further inspection is carried out.

[0077] S2. Using the laser detector 7, switch to high-precision mode to perform a 3D scan of the solder joint area on the control board. Begin depth inspection of the solder joints, and determine whether there are any errors by analyzing the solder joint height and combining it with the pre-stored drawings in the system.

[0078] S2.01. Set the reference value of the weld point height as h, and the actual weld point height as H. When Hh > 0.05 or hH > 0.05 mm, the system determines that the weld point has a problem of poor welding, that there are gaps inside the weld point or the connection is not firm. These gaps or incomplete filling will cause the height of the weld point to change. The system controls the robotic arm 12 to intervene and clamp the carrier plate 10 through the clamping component on the clamping block 56 and transfer it to the groove 47 on the processing plate 45 for reprocessing.

[0079] S2.02. The standard coordinate data of the control board is preset as (x,y) in the control system. The four corners of the control board are located by the laser detector, and the coordinate position of the welding point is calculated. By comparing whether there is a difference in the coordinate position, it is determined whether the welding point is misaligned or incorrect. If there is an error and the error is greater than 0.02mm, it is determined that there is a defect. The system controls the robotic arm 12 to intervene and clamp the carrier plate 10 through the clamping component on the clamping block 56 and transfer it to the groove 47 on the processing plate 45 for reprocessing.

[0080] Furthermore, during a single lifting action, the laser inspection instrument 7 sequentially performs a wide-angle surface scan and a micro-scan of the weld points. The standard coordinate data of the control board, including the precise position of each weld point, is pre-stored in the control system. The laser inspection instrument 7 performs a three-dimensional scan of the weld point area of ​​the control board to obtain the actual height H and coordinate position (X,Y) of each weld point. For each weld point, the deviation between the actual height H and the reference value h is calculated. If Hh > 0.05mm, Xx > 0.02mm, and Yy > 0.02mm, then the weld point has both a cold weld and a weld point position deviation problem. The system determines that there is a serious defect, notifies the staff, and transfers it to the auxiliary processing table 9 via the robotic arm 12 instead of placing it on the processing plate 45. The staff then performs manual re-inspection and high-precision manual repair.

[0081] Specifically, the control board screen detection in S1 can be combined with the solder joint detection in S2, saving the time of the robotic arm 12 grasping the carrier plate 10 and placing it on the processing plate 45 for repeated processing. The laser detector 7 is used to roughly scan whether there are scratches, abrasions and oil stains on the outer surface of the control board. Then, the laser detector 7 is switched to high-precision mode to detect the solder joint area. This avoids the need for secondary repair processing due to poor soldering and misaligned solder joints after the control board is transferred to the processing plate 45 for processing after the surface scratches and oil stains are detected. This saves detection time and transfer time and optimizes the detection process.

[0082] S2.02.1 Furthermore, when the laser detector 7 detects a height difference on the surface of the control board, and when the laser detector 7 is inspecting the solder joint area, a height difference also exists near the solder joint. Combining the overall acquisition of the control board and solder joint area by the first camera, the external analysis mechanism is first used to determine whether there is oil contamination. If there is no oil contamination, the subsequent situation is analyzed. Combining the image acquired by the first camera with manual observation of the acquired image, the laser detector 7 is used to analyze the surface scratch path. If the existing scratch is continuous with the height difference of the solder joint area, it is determined that the scratch extends to the solder joint area. At the same time, if the scratch leaves a mark in the solder joint area, it proves that the scratch is deep. In order to ensure that other aspects of the control board are normal, the robotic arm 12 moves the carrier plate 10 to the auxiliary processing table 9 and notifies the manual removal. Further inspection of other aspects is required, such as the inspection of electrical defects, to avoid damage to internal electronic components. At this time, the movable blocks 11 are unloaded, and the conveyor belt 6 increases its speed to inspect the next control board.

[0083] S2.03. Repair the solder joints using a micro soldering iron on the processing board 45. After repair, place it on the carrier plate 10 for re-inspection.

[0084] After repair, the carrier plate 10 is manually placed back onto the pallet 28 of the movable block 11, and the conveyor belt 6 sends it back to the S1 stage to re-perform the full process inspection to ensure that the repair does not introduce new defects.

[0085] S3. When no defects are found, the conveyor belt 6 continues to work, moving the carrier plate 10 and control plate that have completed the S1 and S2 inspection steps. This facilitates the movement of the control plate on the carrier plate 10 to the laser detector 7 for laser inspection of the S1 and S2 steps. At this time, the carrier plate 10 and control plate that have completed the inspection move to the ejection mechanism in the middle. Since the control plate on the rear carrier plate 10 is being inspected and the inspection on this carrier plate 10 has been completed and can be followed up, the ejection mechanism in the middle lifts up the pallet 28 and the carrier plate 10, notifying the external second robotic arm to collect or transfer them for further processing.

[0086] Furthermore, the middle ejection mechanism is reset, and there are no task items on the surface of the movable block 11 at this time. It waits for the laser detector 7 to detect the control plate between the rear movable blocks 11. If there are no problems in the subsequent detection, it is driven forward by the conveyor belt 6. When the subsequent movable block 11 moves to the middle ejection mechanism, the above steps are repeated for transfer.

[0087] Specifically, at this time, the foremost movable block 11 moves above the vertical groove 24. Under the influence of gravity, the movable block 11 falls into the vertical groove 24. The output end of the electric push rod 23 blocks the movable block 11, causing the locking block 30 on the movable block 11 to move to the plane of the movable groove 21. At the same time, the connecting end 31 on the lower surface of the movable block 11 is embedded in the round hole 38 in the middle of the output end of the first electric telescopic machine 37. By moving the first electric telescopic machine 37, the movable block 11 is moved towards the starting point, waiting for the inspection operation on the surface of the conveyor belt 6 to be carried out. After completion, the movable block 11 is manually pushed back into the uppermost movable groove 21, and the movable rod 32 is reset, so that the limiting block 29 is embedded in the limiting groove 27, and the pallet 28 and the carrier plate 10 are placed to facilitate continuous inspection.

[0088] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0089] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. 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. An automatic defect detection fixture for an automotive OBC control board, comprising a base plate (1), a first drive motor (2) mounted on the base plate (1), fixing blocks (5) mounted on both sides of the first drive motor (2) on the base plate (1), a rotating shaft (18) rotatably mounted on the opposing surfaces of the two fixing blocks (5), and a conveyor belt (6) tensioned and sleeved on the rotating shaft (18), characterized in that, A bottom block (3) is welded between the two fixed blocks (5). A push-out mechanism is provided on the bottom block (3). A frame (4) is welded to both ends of the fixed block (5). A laser detector (7) is fixedly installed on the frame (4). The base plate (1) is provided with a vertical plate (8) outside the two fixed blocks (5), and a traction component is slidably provided on the vertical plate (8). The upper surface of the conveyor belt (6) is provided with a movable block (11), and a support component is provided on the movable block (11). A robotic arm (12) is also provided on the base plate (1). A first connecting plate (13) is provided at the output end of the robotic arm (12). Clamping blocks (56) are movably provided on both sides of the first connecting plate (13). An auxiliary processing table (9) is also provided on the base plate (1). A processing component is provided on the auxiliary processing table (9). The processing component includes a fixed base (39) provided on the auxiliary processing table (9). A first moving groove (40) and a second moving groove (41) are provided on the fixed base (39). A processing plate (45) is provided below the first moving groove (40). A groove (47) is provided on the processing plate (45). A second moving block (42) is slidably arranged in the second moving groove (41). A cutting disc (50) is movably arranged on the second moving block (42). A first moving block (46) with a wiping cloth is slidably arranged in the moving groove (40); a mounting plate (43) is provided on the second moving block (42), and a horizontal plate (44) is connected through the mounting plate (43). A third drive motor (52) is installed on the horizontal plate (44), and a movable plate (51) is sleeved on the output shaft of the third drive motor (52). A guard plate (49) is provided on the movable plate (51), and a second drive motor (48) is provided at one end of the guard plate (49). The output shaft of the second drive motor (48) extends to the other side of the guard plate (49) and connects to the cutting disc (50). The control board is initially inspected by a laser detector (7) to check for scratches, abrasions, and oil stains on its outer surface. The laser detector (7) performs a simple and rough scan, and the first camera collects information on the surface of the control board to detect oil stains and scratches. If oil stains are present, the wiping cloth on the lower surface of the first moving block (46) is replaced by manually selecting different cleaning agents. The first moving block (46) is then driven by the second drive assembly to slide back and forth in the first moving groove (40) to clean the oil stains. When the second camera on the auxiliary processing table (9) detects foreign objects on the surface, the third drive motor (52) is manually controlled to drive the moving plate ( 51) Rotate, the cutting disc (50) descends to 0.5mm from the surface of the control board, the second drive motor (48) drives the cutting disc (50) to remove metal debris, the first moving block (46) moves back and forth three times along the first moving groove (40), and the wiping cloth wipes away residual particles; when the laser detector (7) and the first camera are detecting the control board screen, the height of the control board itself is set to be without error and is a fixed height. When the laser detector (7) continuously scans the surface of the control board, the height reading changes, and when the first camera collects information, it does not find oil stains on the surface of the control board. Therefore, it can be concluded that there is a dent on the surface of the control board, and the system determines that there are scratches or abrasions on the surface of the control board. After wiping or repairing the control board, the control board and the carrier plate (10) are placed back on the movable block (11) and sent back to the laser detector (7) for re-inspection via the conveyor belt (6): the ejection mechanism drives the carrier plate (10) to move back to the laser detector (7) for a second round of oil stain and scratch inspection. If there are no defects, further inspection is carried out; the laser detector (7) switches to high-precision mode to perform three-dimensional scanning of the solder joint area of ​​the control board and begins to perform in-depth inspection of the solder joint.

2. The automatic defect detection fixture for an automotive OBC control board according to claim 1, characterized in that, The ejection mechanism includes multiple second electric telescopic machines (57) evenly distributed in the gap of the conveyor belt (6). The bottom of each second electric telescopic machine (57) is fixedly connected to the bottom block (3). The telescopic end of the second electric telescopic machine (57) is equipped with a top plate (58). The length of the top plate (58) is greater than the length of the bearing plate (10), and its two ends are provided with upward deflection limit buckles (59). The initial position of the top plate (58) is lower than the top of the fixed block (5).

3. The automatic defect detection fixture for an automotive OBC control board according to claim 1, characterized in that, The frame (4) extends directly above the top plate (58), and the laser detector (7) is positioned at the center of the top plate (58).

4. The automatic defect detection fixture for an automotive OBC control board according to claim 1, characterized in that, The supporting component includes a mounting block (25) disposed on the top of the movable block (11), a rotating rod (33) is rotatably disposed inside the mounting block (25), a rotating column (34) is sleeved on the rotating rod (33), a movable rod (32) is fixedly connected to the rotating column (34), a second connecting plate (26) is fixedly connected to the end of the movable rod (32), a support plate (28) is fixedly disposed on the second connecting plate (26), a locking block (30) is disposed on one side of the movable block (11), and a connecting end (31) is disposed at the bottom of the movable block (11).

5. The automatic defect detection fixture for an automotive OBC control board according to claim 4, characterized in that, The traction assembly includes a sliding groove (35) formed on the surface of the vertical plate (8), a slider (36) is slidably connected in the sliding groove (35), a first electric telescopic mechanism (37) is installed on the slider (36), and the output end of the first electric telescopic mechanism (37) is provided with a round hole (38) adapted to the connecting end (31).

6. The automatic defect detection fixture for an automotive OBC control board according to claim 5, characterized in that, The fixed block (5) has several protrusions (20) evenly arranged on both sides. A movable groove (21) is provided between the protrusions (20). A vertical groove (24) is connected below the movable groove (21). A rubber pad (22) is provided on one side wall of the vertical groove (24), and an electric push rod (23) is provided on the other side wall. The width of the vertical groove (24) is the same as the width of the movable block (11), and the width of the movable groove (21) is the same as the height of the locking block (30).

7. The automatic defect detection fixture for an automotive OBC control board according to claim 4, characterized in that, The upper surface of the fixing block (5) is provided with a limiting groove (27), and the bottom of the tray (28) is provided with a limiting block (29) that is adapted to the limiting groove (27).

8. The automatic defect detection fixture for an automotive OBC control board according to claim 1, characterized in that, The range of motion of the robotic arm (12) covers the entire conveyor belt (6) and the auxiliary processing table (9).

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