Electronic chip surface tin brushing device based on machine vision positioning

Abstract

The invention discloses an electronic chip surface tin brushing device based on machine vision positioning, and relates to the technical field of electronic manufacturing equipment.The electronic chip surface tin brushing device comprises a shell, a top box, a dynamic adjusting assembly and an intelligent control system, the top box is installed at the top of the outer wall of the shell, and the dynamic adjusting assembly is installed in the top box; the dynamic adjusting assembly is connected to the intelligent control system through a wireless control network. By installing the dynamic adjusting assembly, the function of adjusting the tin brushing position and angle is achieved, the problem that the tin brushing angle and position cannot be adjusted in a self-adaptive mode is solved, the tin brushing precision and effect are improved, and the problems that tin paste is wasted and the manual adjusting precision is poor are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of electronic manufacturing equipment, and in particular to a device for brushing tin on the surface of an electronic chip based on machine vision positioning. Background Art

[0002] As electronic products continue to become smaller and more complex, the manufacturing process of electronic chips has higher and higher requirements for precision and consistency. In the production process of electronic chips, the precise coating of solder paste is one of the key steps to ensure the normal function of the chip. However, the traditional tinning process has problems such as large manual operation errors, low tinning accuracy, and untimely defect detection, which makes it difficult to meet the needs of modern high-precision chip manufacturing.

[0003] Therefore, this application proposes a device for brushing solder on the surface of electronic chips based on machine vision positioning to ensure accurate positioning of the brush head and avoid poor brushing due to position deviation. At the same time, the online detection module monitors the quality of the solder points in real time, promptly discovers and corrects defects in the soldering process, and ensures that each solder point meets the design requirements.

[0004] Patent document CN113942293B discloses a through-hole solder paste printing device. The above patent realizes that while meeting the through-hole reflow device soldering process, it can increase the filling amount of solder paste in the through-hole, thereby improving the welding quality and product quality, but the above patent cannot realize the function of adjusting the angle of the tin brush position.

[0005] Patent document CN112543558B discloses a circuit board solder paste brushing device. The above patent not only can place multiple circuit boards for solder paste brushing, greatly improving the efficiency of solder paste brushing, but also can achieve the purpose of fast and faster board uploading, greatly improving the replacement efficiency. However, the above patent cannot realize the dynamic adjustment function of the solder brushing form.

[0006] Patent document CN108738245B discloses an automatic solder paste adding device and system for a solder paste printer, and the above patent realizes the positioning action of moving the solder paste tank to the required height above the stencil and the solder adding action of distributing the solder paste from the nozzle of the solder paste tank to the stencil using only one driving device. Therefore, the mechanical structure and control system of the automatic solder paste adding device of the present invention are simple, and the space occupied is small and the cost is low, but the above patent cannot realize the positioning and identification function of the electronic chip.

[0007] Patent document CN109049948B discloses an automatic solder paste printing device and printing method. The above patent achieves simple structure, simple operation, high degree of automation, high printing efficiency and low cost, but the above patent cannot realize the real-time detection function of the solder brushing effect.

[0008] In summary, the above patents cannot realize the functions of adjusting the tin brushing position angle, dynamically adjusting the tin brushing form, locating and identifying the electronic chip, and real-time detecting the tin brushing effect, resulting in poor positioning accuracy, poor tin brushing effect, waste of solder paste, and low tin brushing efficiency. To this end, the present application proposes an electronic chip surface tinning device based on machine vision positioning, which can realize the adjustment function of the tinning position angle, the dynamic adjustment function of the tinning form, the positioning and identification function of the electronic chip and the real-time detection function of the tinning effect. Summary of the invention

[0009] The purpose of the present invention is to provide an electronic chip surface tinning device based on machine vision positioning, so as to solve the technical problems proposed in the above background technology that the adjustment function of the tinning position angle, the dynamic adjustment function of the tinning form, the positioning and identification function of the electronic chip and the real-time detection function of the tinning effect cannot be realized, resulting in poor positioning accuracy, poor tinning effect, waste of solder paste and low tinning efficiency.

[0010] To achieve the above object, the present invention provides the following technical solution: a device for brushing tin on the surface of an electronic chip based on machine vision positioning, comprising a housing, a top box, a dynamic adjustment component and an intelligent control system, wherein a top box is installed on the top of the outer wall of the housing, a dynamic adjustment component is installed in the top box, and the dynamic adjustment component is connected to the intelligent control system via a wireless control network; The dynamic adjustment component comprises: a screw rod, an adjustment block and a brush tin box; A first motor is installed on the side of the outer wall of the top box, a first rotating shaft is installed on the side of the outer wall of the first motor, a screw rod is mounted on the outer wall of the first rotating shaft, an adjusting block is mounted on the outer wall of the screw rod, a first connecting rod is installed on the bottom of the outer wall of the adjusting block, a limiting slide rod is installed on the side of the inner wall of the top box, and the first connecting rod is mounted on the outer wall of the limiting slide rod, a tin brush box is installed on the bottom of the outer wall of the first connecting rod, a feeding pipe is installed on the bottom of the outer wall of the tin brush box, a dynamic tin brush assembly is installed on the bottom of the outer wall of the feeding pipe, and the dynamic tin brush assembly is connected to the intelligent control system through a wireless control network.

[0011] Preferably, the dynamic tin brushing component is used to dynamically adjust the tin brushing mode according to the real-time tin brushing situation, and the dynamic tin brushing component is connected to the intelligent control system through a wireless control network; The dynamic tin brushing assembly includes: a conversion ball head, a micro motor and an adapter tube; A conversion ball head is installed at the bottom of the outer wall of the feed tube, a micro motor is installed on the back of the outer wall of the conversion ball head, a micro shaft is installed on the front of the outer wall of the micro motor, and an adapter material tube is installed on the outer wall of the micro shaft. The adapter material tube is designed with four openings, two openings on the upper part and one opening on the left and right parts. Extension plates are installed on both sides of the outer wall of the conversion ball head, and tin brush array channels are installed inside the extension plates, and one side of the tin brush array channels is consistent in size with the opening of the adapter material tube. A tin supplement material tube is installed at the bottom of the outer wall of the conversion ball head, and the tin supplement material tube is consistent in size with the opening of the adapter material tube, and a tin supplement pressure head is installed at the bottom of the outer wall of the tin supplement material tube.

[0012] Preferably, an angle adjustment component is installed inside the tin brushing box, and the angle adjustment component is connected to the intelligent control system through a wireless control network, and the angle adjustment component is used to adjust the tin brushing and tin supplementing angles; The angle adjustment component includes: a second motor, a second rotating shaft and a pump material suction seat; A second motor is installed on the top of the inner wall of the tin brush box, a second rotating shaft is installed on the bottom of the outer wall of the second motor, a pump material suction seat is installed on the bottom of the outer wall of the second rotating shaft, a discharge pipe is mounted on the bottom of the outer wall of the pump material suction seat, a spiral extrusion power shaft is installed inside the pump material suction seat, and the outer wall of the spiral extrusion power shaft is mounted with spiral blades, a solder paste can is installed on the top of the outer wall of the top box, and the solder paste can is connected to the tin brush box through a hose.

[0013] Preferably, a movable track is provided on the back side of the inner wall of the outer shell, a movable block is installed in the movable track, a support block is installed on the front side of the outer wall of the movable block, an air hydraulic cylinder is installed on the front side of the outer wall of the support block, and the air hydraulic cylinder is connected to the intelligent control system through a wireless control network, a hydraulic telescopic rod is installed on the front side of the outer wall of the air hydraulic cylinder, and the front side of the outer wall of the hydraulic telescopic rod is fixedly connected to the tin brush box.

[0014] Preferably, a movable sliding observation window is installed on the front side of the outer wall of the shell, and a supporting leg is installed on the bottom of the outer wall of the shell.

[0015] Preferably, a third motor is installed on the front of the inner wall of the shell, a third rotating shaft is installed on the back of the outer wall of the third motor, a transmission roller is mounted on the outer wall of the third rotating shaft, a conveyor belt is mounted on the outer wall of the transmission roller, and the conveyor belt is used to transport a chip fixture with electronic chips placed thereon.

[0016] Preferably, a visual positioning module is installed in the housing, and the visual positioning module is used to locate and identify the position parameters of the chip fixture in real time; The visual positioning module includes: industrial camera, LED light source and image processor; An industrial camera is installed on the top of the inner wall of the shell, an image processor is installed on the top of the inner wall of the shell, and the industrial camera is connected to the image processor through a data cable, an LED light source is installed on the bottom of the outer wall of the image processor through a power cable, and the image processor is connected to the intelligent control system through a data signal line; The image processor is equipped with a GPU to support real-time image processing. The image processor has built-in dedicated algorithm modules, including edge detection, feature point recognition and image matching algorithms. It is based on the OpenCV customized software platform and integrates image enhancement, filtering, template matching and shape analysis functions.

[0017] Preferably, a real-time detection module is installed on the back of the inner wall of the shell, and the real-time detection module is used to detect the tinning effect and provide information feedback; The real-time detection module includes: laser scanning 3D vision sensor and defect recognition processor; A laser scanning 3D visual sensor is installed on the back of the inner wall of the shell, a defect recognition processor is installed on the back of the inner wall of the shell, and the laser scanning 3D visual sensor is connected to the defect recognition processor through a data cable; The defect recognition processor has built-in machine learning and image analysis algorithms that can automatically identify missing, excessive and offset solder point defects and connect to the dynamic solder brushing components through a wireless network.

[0018] Preferably, the intelligent control system is used to analyze and adjust the tinning process in real time; The intelligent control system includes: a data acquisition unit, a data analysis unit and a remote control unit; The data acquisition unit receives the soldering process parameters in real time and detects abnormal conditions on the received feedback data; The data analysis unit uses a cloud computing-based big data analysis platform to analyze historical operation data, identify key factors affecting tinning quality, and adaptively optimize the tinning process through machine learning models; The remote control unit is connected to the tin brushing device through the industrial Internet, supporting remote fault diagnosis and parameter adjustment.

[0019] Preferably, an ion exhaust fan is installed on the side of the outer wall of the shell, ion air ducts are installed on both sides of the inner wall of the shell, a fourth motor is installed at the bottom of the inner wall of the ion air duct, a fourth rotating shaft is installed at the bottom of the outer wall of the fourth motor, an ion fan is mounted on the outer wall of the fourth rotating shaft, and a heating wire is also connected to the ion air duct at the outlet of the tin brushing device through a power cord.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes the adjustment function of the tin brushing position angle by installing a dynamic adjustment component, solves the problem that the tin brushing angle and position cannot be adjusted adaptively, improves the tin brushing accuracy and effect, and avoids the problem of tin paste waste and poor manual adjustment accuracy; 2. The present invention realizes the dynamic adjustment function of the tin brushing form by installing a dynamic tin brushing component, solves the problem that the tin brushing mode cannot be automatically adjusted, improves the tin brushing effect, and meets the needs of different tin brushing forms; 3. The present invention realizes the positioning and identification function of the electronic chip by installing a visual positioning module, solves the problem of large manual alignment deviation, improves the effect and efficiency, and avoids the problem of solder paste waste; 4. The present invention realizes the real-time detection function of the tin brushing effect by installing a real-time detection module, solves the problem that the tin brushing defects cannot be identified by human naked eye observation, improves the tin brushing completeness, and improves the tin brushing effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the front structure of the present invention; Figure 3 It is a partial structural schematic diagram of the dynamic adjustment component of the present invention; Figure 4 It is a partial structural schematic diagram of the air hydraulic cylinder of the present invention; Figure 5 It is a partial structural schematic diagram of the real-time detection module of the present invention; Figure 6 It is a partial structural schematic diagram of the dynamic tin brushing component of the present invention; Figure 7 It is a partial structural schematic diagram of the angle adjustment component of the present invention; Figure 8 It is a partial schematic diagram of the intelligent control system of the present invention.

[0022] In the figure: 1. Shell; 2. Top box; 3. First motor; 4. Solder paste can; 5. Support leg; 6. Active push-pull observation window; 7. Conveyor belt; 8. Ion exhaust fan; 9. Feeding pipe; 10. Conversion ball head; 11. Extension plate; 12. Third motor; 13. Third rotating shaft; 14. Transmission roller; 15. First rotating shaft; 16. Screw rod; 17. Adjustment block; 18. First connecting rod; 19. Limiting slide rod; 20. Tin brush box; 21. Hydraulic telescopic rod; 22. Active track; 23. Active block; 24. Support block; 25. Air hydraulic cylinder; 26. Industrial camera; 27. Image processor; 28. LED light source; 29. ​​Defect recognition processor; 30. Laser scanning 3D visual sensor; 31. Ion air duct; 32. Fourth motor; 33. Fourth shaft; 34. Ion fan; 35. Heating wire; 36. Micro motor; 37. Micro shaft; 38. Adapter material pipe; 39. Tin filling material pipe; 40. Tin filling hair pressing head; 41. Tin brush array channel; 42. Second motor; 43. Second shaft; 44. Pump material suction seat; 45. Spiral extrusion power shaft; 46. Spiral blade; 47. Hose. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1 , Figure 2 and Figure 3 , an embodiment provided by the present invention: a device for brushing tin on the surface of an electronic chip based on machine vision positioning, comprising a shell 1, a top box 2, a dynamic adjustment component and an intelligent control system, wherein the top box 2 is installed on the top of the outer wall of the shell 1, and the dynamic adjustment component is installed in the top box 2, and the dynamic adjustment component is connected to the intelligent control system through a wireless control network; The dynamic adjustment assembly includes: a screw rod 16, an adjustment block 17 and a brush tin box 20; A first motor 3 is installed on the side of the outer wall of the top box 2, a first rotating shaft 15 is installed on the side of the outer wall of the first motor 3, a screw rod 16 is sleeved on the outer wall of the first rotating shaft 15, an adjusting block 17 is sleeved on the outer wall of the screw rod 16, a first connecting rod 18 is installed on the bottom of the outer wall of the adjusting block 17, a limiting slide bar 19 is installed on the side of the inner wall of the top box 2, and the first connecting rod 18 is sleeved on the outer wall of the limiting slide bar 19, a tin brush box 20 is installed on the bottom of the outer wall of the first connecting rod 18, a feeding tube 9 is installed on the bottom of the outer wall of the tin brush box 20, a dynamic tin brush component is installed on the bottom of the outer wall of the feeding tube 9, and the dynamic tin brush component is connected to the intelligent control system through a wireless control network; A movable track 22 is provided on the back of the inner wall of the shell 1, a movable block 23 is installed in the movable track 22, a support block 24 is installed on the front of the outer wall of the movable block 23, an air hydraulic cylinder 25 is installed on the front of the outer wall of the support block 24, and the air hydraulic cylinder 25 is connected to the intelligent control system through a wireless control network, a hydraulic telescopic rod 21 is installed on the front of the outer wall of the air hydraulic cylinder 25, and the outer wall front of the hydraulic telescopic rod 21 is fixedly connected to the tin brush box 20; Furthermore, the intelligent control system controls and adjusts the position of the tin brush box 20 according to the positioning algorithm based on the identified position of the chip fixture, the first motor 3 is started, the first motor 3 drives the first rotating shaft 15 to rotate, the first rotating shaft 15 drives the screw 16 to rotate, the rotation of the screw 16 drives the adjusting block 17 to move left and right, the adjusting block 17 drives the first connecting rod 18 to move on the limiting slide bar 19, and the first connecting rod 18 drives the tin brush box 20 to move left and right; at the same time, the tin brush box 20 drives the supporting block 24 and the movable block 23 to move left and right in the movable track 22 through the hydraulic telescopic rod 21 and the air hydraulic cylinder 25, the air hydraulic cylinder 25 is started, the air hydraulic cylinder 25 drives the hydraulic telescopic rod 21 to extend and retract back and forth, the hydraulic telescopic rod 21 drives the tin brush box 20 to move, and adjusts 20 to be directly above the chip fixture, and then performs the tin brushing operation, thereby realizing the adjustment of the tin brushing position, ensuring the correct tin brushing position, and preventing the problems of tin brushing deviation and solder paste waste.

[0027] See also Figure 1 , Figure 6 and Figure 7 , an embodiment provided by the present invention: a device for brushing tin on the surface of an electronic chip based on machine vision positioning, wherein the dynamic brushing tin component is used to dynamically adjust the brushing mode according to the real-time brushing tin situation, and the dynamic brushing tin component is connected to the intelligent control system through a wireless control network; The dynamic tin brushing assembly includes: a conversion ball head 10, a micro motor 36 and an adapter material tube 38; A conversion ball head 10 is installed at the bottom of the outer wall of the feed tube 9, a micro motor 36 is installed on the back of the outer wall of the conversion ball head 10, a micro shaft 37 is installed on the front of the outer wall of the micro motor 36, and an adapter material tube 38 is installed on the outer wall of the micro shaft 37. The adapter material tube 38 is designed as a four-way port, which are two upper ports and one left and right port, respectively. Extension plates 11 are installed on both sides of the outer wall of the conversion ball head 10, and a tin brush array channel 41 is installed inside the extension plate 11, and one side of the tin brush array channel 41 is consistent with the size of the port of the adapter material tube 38. A tin supplement material tube 39 is installed at the bottom of the outer wall of the conversion ball head 10, and the tin supplement material tube 39 is consistent with the port of the adapter material tube 38. A tin supplement pressing head 40 is installed at the bottom of the outer wall of the tin supplement material tube 39; The outer wall of the housing 1 is provided with a movable sliding observation window 6 on the front side, and a supporting leg 5 is provided at the bottom of the outer wall of the housing 1; Furthermore, the movable push-pull observation window 6 is used to observe the working conditions in real time, and the support legs 5 are used to support the tin brushing device stably; When performing sheet tinning, the intelligent control system starts the micro motor 36 through the wireless network control, the micro motor 36 drives the micro shaft 37 to rotate, the micro shaft 37 drives the adapter material tube 38 to rotate, the adapter material tube 38 rotates to connect to the opening of the tinning array channel 41 in the extension plate 11, and the solder paste enters the tinning array channel 41 to perform tinning operation on the electronic chip on the chip fixture; When the dynamic tin brushing component receives the tin replenishing operation, the intelligent control system starts the micro motor 36 through the wireless network control, the micro motor 36 drives the micro shaft 37 to rotate, the micro shaft 37 drives the adapter material tube 38 to rotate, the adapter material tube 38 rotates to connect to the tin replenishing material tube 39, the solder paste enters the tin replenishing material tube 39 and the tin replenishing pressing head 40, and the abnormal points are replenished with tin, realizing the dynamic adjustment function of tin brushing and tin replenishing, improving the level of automation and intelligence, and saving the operation time and cost of manual tin replenishing.

[0028] See also Figure 3 , Figure 4 and Figure 7 , an embodiment provided by the present invention: a device for brushing tin on the surface of an electronic chip based on machine vision positioning, wherein an angle adjustment component is installed inside the brushing tin box 20, and the angle adjustment component is connected to the intelligent control system through a wireless control network, and the angle adjustment component is used to adjust the brushing tin and the tin supplement angle; The angle adjustment assembly includes: a second motor 42, a second rotating shaft 43 and a pump material suction seat 44; A second motor 42 is installed at the top of the inner wall of the tin brush box 20, a second rotating shaft 43 is installed at the bottom of the outer wall of the second motor 42, a pumping material suction seat 44 is installed at the bottom of the outer wall of the second rotating shaft 43, a feeding pipe 9 is sleeved at the bottom of the outer wall of the pumping material suction seat 44, a spiral extrusion power shaft 45 is installed inside the pumping material suction seat 44, and a spiral blade 46 is sleeved on the outer wall of the spiral extrusion power shaft 45, a solder paste tank 4 is installed at the top of the outer wall of the top box 2, and the solder paste tank 4 is connected to the tin brush box 20 through a hose 47; Furthermore, after the intelligent control system recognizes that the chip fixture has a position angle deviation, it generates an angle adjustment signal and sends it to the angle adjustment component, and the intelligent control system starts the second motor 42, the second motor 42 drives the second shaft 43 to rotate, the second shaft 43 drives the pump material suction seat 44 to rotate, the pump material suction seat 44 drives the feed pipe 9 to rotate, and the feed pipe 9 drives the conversion ball head 10 to rotate, so as to adjust the tin brushing angle. At the same time, the spiral extrusion power shaft 45 installed inside the pump material suction seat 44 is turned on and rotated by the motor under the power start signal, and the spiral extrusion power shaft 45 pumps the solder paste in the feed pipe 9 into the conversion ball head 10 for diversion tin brushing and tin replenishing operations, thereby realizing the dynamic adjustment function of the tin brushing angle, and solving the problems of poor tin brushing effect and waste of solder paste caused by the crooked placement of the chip fixture and the wrong placement of the solder paste.

[0029] See also Figure 1 , Figure 5 and Figure 8 , an embodiment provided by the present invention: a device for brushing tin on the surface of an electronic chip based on machine vision positioning, wherein a third motor 12 is installed on the front of the inner wall of the housing 1, a third rotating shaft 13 is installed on the back of the outer wall of the third motor 12, a transmission roller 14 is mounted on the outer wall of the third rotating shaft 13, a conveyor belt 7 is mounted on the outer wall of the transmission roller 14, and the conveyor belt 7 is used to convey a chip fixture on which an electronic chip is placed; A visual positioning module is installed in the housing 1, and the visual positioning module is used to locate and identify the position parameters of the chip fixture in real time; The visual positioning module includes: an industrial camera 26, an LED light source 28 and an image processor 27; An industrial camera 26 is installed on the top of the inner wall of the housing 1, an image processor 27 is installed on the top of the inner wall of the housing 1, and the industrial camera 26 is connected to the image processor 27 through a data cable, an LED light source is installed on the bottom of the outer wall of the image processor 27 through a power cable, and the image processor 27 is connected to the intelligent control system through a data signal line; The image processor 27 is equipped with a GPU to support real-time image processing. The image processor 27 has built-in dedicated algorithm modules, including edge detection, feature point recognition and image matching algorithms. Based on the OpenCV custom software platform, it integrates image enhancement, filtering, template matching and shape analysis functions; Further, the third motor 13 is started, the third motor 12 drives the third rotating shaft 13 to rotate, the third rotating shaft 13 drives the transmission roller 14 to rotate, the transmission roller 14 drives the conveyor belt 7 to rotate, and the conveyor belt 7 delivers the chip fixture with the electronic chip placed thereon into the tin brushing device; The industrial camera 26 collects the position of the chip fixture in real time, and the LED light source 28 is used for fill light to ensure that the industrial camera 26 can clearly identify the logos of the four corners of the chip fixture. The image processor 27 receives the real-time image data information transmitted by the industrial camera 26. The image processor 27 uses the Sobel operator or the Canny operator to perform edge detection on the grayscale image. The purpose of this step is to highlight the edge contour of the tin point on the surface of the chip. The image after edge detection is binarized to clearly separate the edge of the tin point from the background. On the basis of the binarized image, the system uses a corner detection algorithm (such as Harris corner detection or Shi-Tomasi algorithm) to identify the feature points of the tin point on the surface of the chip. These feature points are the geometric center or edge intersection of the tin point. The purpose of identifying them is to provide a benchmark for subsequent positioning calculations. The identified feature points are matched with the pre-stored standard tin point model through template matching or shape matching algorithms. During the matching process, the system calculates the offset and rotation angle of the actual feature point and the model, and records the precise position of the tin point (X, Y coordinates and rotation angle); The calculated tin point position data is transmitted to the intelligent control system through a high-speed data bus (such as a PCIe interface). Based on the position information of the tin point, the intelligent control system analyzes the deviation between the current position of the tin brush head and the target position, and calculates the motion path of the tin brush box 20 according to the position information and the preset motion trajectory.

[0030] See also Figure 1 , Figure 2 Figure 5 , an embodiment provided by the present invention: a device for brushing tin on the surface of an electronic chip based on machine vision positioning, a real-time detection module is installed on the back of the inner wall of the shell 1, and the real-time detection module is used to detect the brushing tin effect and provide information feedback; The real-time detection module includes: a laser scanning 3D vision sensor 30 and a defect recognition processor 29; A laser scanning 3D vision sensor 30 is installed on the back of the inner wall of the housing 1, a defect recognition processor 29 is installed on the back of the inner wall of the housing 1, and the laser scanning 3D vision sensor 30 is connected to the defect recognition processor 29 via a data line; The defect recognition processor 29 has built-in machine learning and image analysis algorithms, which can automatically identify the missing, excessive and offset defects of tin points, and connect to the dynamic tin brushing component through a wireless network; The intelligent control system is used to analyze and adjust the tinning process in real time; The intelligent control system includes: a data acquisition unit, a data analysis unit and a remote control unit; The data acquisition unit receives the soldering process parameters in real time and detects abnormal conditions on the received feedback data; The data analysis unit uses a cloud computing-based big data analysis platform to analyze historical operation data, identify key factors affecting tinning quality, and adaptively optimize the tinning process through machine learning models; The remote control unit is connected to the tin brushing device through the industrial Internet, supporting remote fault diagnosis and parameter adjustment; An ion exhaust fan 8 is installed on the side of the outer wall of the shell 1, and ion air ducts 31 are installed on both sides of the inner wall of the shell 1. A fourth motor 32 is installed at the bottom of the inner wall of the ion air duct 31, and a fourth shaft 33 is installed at the bottom of the outer wall of the fourth motor 32. An ion fan 34 is installed on the outer wall of the fourth shaft 33. A heating wire 35 is also connected to the ion air duct 31 at the outlet of the tin brushing device through a power line. Furthermore, the laser scanning 3D vision sensor 30 uses laser scanning or structured light technology to obtain detailed information on the surface morphology of the tin dots by three-dimensional imaging. After receiving the image data collected by the laser scanning 3D vision sensor 30, the defect recognition processor 29 compares the actual detected tin dot shape with the pre-stored ideal tin dot template to identify the shape deviation. Through the edge detection algorithm, it is confirmed whether there are irregularities or breaks on the edge of the tin dot. The volume of the tin dot is calculated using the three-dimensional data and compared with the preset standard volume to determine whether the tin dot is excessive or insufficient. The detected defects are classified according to their severity, such as minor defects, acceptable defects, and severe defects. For severe defects, such as severe deviation of the tin dot, severe shortage of tin, or cracks on the surface, the system will trigger an alarm and suspend production through the control system. The operator can view the alarm information through the human-machine interface (HMI) and take corresponding measures; After detecting the tin point defect, the real-time detection module will feed back the defect information to the intelligent control system, and the intelligent control system will automatically adjust the motion parameters and solder paste supply of the tin brushing box 20 according to the detected deviation to correct the operation in the subsequent tin brushing process. This feedback control process is a closed loop, that is, the real-time detection is combined with the real-time adjustment to ensure that the subsequent tin brushing operation can automatically compensate for the previous error; All test results and related tinning parameters are stored in a cloud server or local database. These data include the three-dimensional morphology of each tin spot, the type of defect detected, the location and the corresponding correction parameters. Through the analysis of long-term data by the data analysis unit, the system can gradually improve the machine learning model, so as to more accurately predict and identify defects and intervene at an early stage. This continuous self-learning and optimization can greatly improve the overall quality and efficiency of the production line; The ion exhaust fan 8 forms ion wind by breaking up air molecules, the fourth motor 32 is started, the fourth motor 32 drives the fourth shaft 33 to rotate, the fourth shaft 33 drives the ion fan 34 to rotate, and the ion fan 34 blows the ion air in the ion duct 31 to the surface of the electronic chip on the chip fixture to perform ion cleaning before tinning; when the tinning is completed, the heating wire 35 heats the ion air in the ion duct 31 and blows it to the surface of the electronic chip, thereby realizing the cleaning of the surface of the electronic chip and the curing of the solder paste.

[0031] Working principle: First, the chip fixture carrying the electronic chip enters the tin brushing device, and the visual positioning module identifies the angle and position of the chip fixture, and transmits the identified data to the intelligent control system. The intelligent control system generates corresponding control adjustment signals according to the electronic chip position information and transmits them to each execution module; Next, the dynamic adjustment component and the angle adjustment component are started, and the tinning execution structure is moved and adjusted to the tinning position according to the control adjustment signal. At this time, the dynamic tinning component performs the surface array tinning operation, and then the real-time detection module detects the tinning effect, and transmits the collected tinning result data to the intelligent control system for feedback adjustment; Finally, the intelligent control system identifies defects and problems based on the tin brushing results, and generates control adjustment signals to the dynamic tin brushing components for tin replenishment operations. If it is identified that the tin brushing problem is beyond the normal range, the problem data will be promptly fed back to the control center to prompt troubleshooting and suspend the tin brushing operation to prevent the defective rate from increasing and wasting resources and costs.

[0032] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A device for brushing tin on the surface of an electronic chip based on machine vision positioning, comprising a housing (1), a top box (2), a dynamic adjustment component and an intelligent control system, characterized in that: A top box (2) is installed on the top of the outer wall of the housing (1), a dynamic adjustment component is installed in the top box (2), and the dynamic adjustment component is connected to the intelligent control system via a wireless control network; The dynamic adjustment component comprises: a screw rod (16), an adjustment block (17) and a tin brush box (20); A first motor (3) is mounted on the side of the outer wall of the top box (2); a first rotating shaft (15) is mounted on the side of the outer wall of the first motor (3); a screw rod (16) is sleeved on the outer wall of the first rotating shaft (15); an adjustment block (17) is sleeved on the outer wall of the screw rod (16); a first connecting rod (18) is mounted on the bottom of the outer wall of the adjustment block (17); a limit slide rod (19) is mounted on the side of the inner wall of the top box (2); the first connecting rod (18) is sleeved on the outer wall of the limit slide rod (19); a tin brush box (20) is mounted on the bottom of the outer wall of the first connecting rod (18); a feed tube (9) is mounted on the bottom of the outer wall of the tin brush box (20); a dynamic tin brush component is mounted on the bottom of the outer wall of the feed tube (9); and the dynamic tin brush component is connected to an intelligent control system via a wireless control network.

2. According to claim 1, a device for brushing tin on the surface of an electronic chip based on machine vision positioning is characterized in that: The dynamic tin brushing component is used to dynamically adjust the tin brushing mode according to the real-time tin brushing situation, and the dynamic tin brushing component is connected to the intelligent control system through a wireless control network; The dynamic tin brushing assembly comprises: a conversion ball head (10), a micro motor (36) and an adapter material tube (38); A conversion ball head (10) is installed at the bottom of the outer wall of the feed tube (9), a micro motor (36) is installed at the back of the outer wall of the conversion ball head (10), a micro shaft (37) is installed at the front of the outer wall of the micro motor (36), and an adapter material tube (38) is sleeved on the outer wall of the micro shaft (37), and the adapter material tube (38) is designed to have four openings, namely, two openings on the upper side and one opening on the left and right sides. Extension plates (11) are installed on both sides of the outer wall of the conversion ball head (10), and a tin brush array channel (41) is installed inside the extension plate (11), and one side of the tin brush array channel (41) is consistent in size with the opening of the adapter material tube (38). A tin supplement material tube (39) is installed at the bottom of the outer wall of the conversion ball head (10), and the opening of the tin supplement material tube (39) is consistent in size with the opening of the adapter material tube (38), and a tin supplement pressing head (40) is installed at the bottom of the outer wall of the tin supplement material tube (39).

3. The electronic chip surface tinning device based on machine vision positioning according to claim 1 is characterized in that: The tin brushing box (20) is internally installed with an angle adjustment component, which is connected to the intelligent control system via a wireless control network, and is used to adjust the tin brushing and tin supplementing angles; The angle adjustment component comprises: a second motor (42), a second rotating shaft (43) and a pump material suction seat (44); A second motor (42) is mounted on the top of the inner wall of the tin brush box (20); a second rotating shaft (43) is mounted on the bottom of the outer wall of the second motor (42); a pumping material suction seat (44) is mounted on the bottom of the outer wall of the second rotating shaft (43); a feeding pipe (9) is sleeved on the bottom of the outer wall of the pumping material suction seat (44); a spiral extrusion power shaft (45) is mounted inside the pumping material suction seat (44); a spiral blade (46) is sleeved on the outer wall of the spiral extrusion power shaft (45); a solder paste tank (4) is mounted on the top of the outer wall of the top box (2); and the solder paste tank (4) is connected to the tin brush box (20) via a hose (47).

4. The electronic chip surface tinning device based on machine vision positioning according to claim 1 is characterized in that: The inner wall back of the housing (1) is provided with a movable track (22), a movable block (23) is installed in the movable track (22), a support block (24) is installed on the outer wall front of the movable block (23), an air hydraulic cylinder (25) is installed on the outer wall front of the support block (24), and the air hydraulic cylinder (25) is connected to the intelligent control system via a wireless control network. A hydraulic telescopic rod (21) is installed on the outer wall front of the air hydraulic cylinder (25), and the outer wall front of the hydraulic telescopic rod (21) is fixedly connected to the tin brush box (20).

5. The electronic chip surface tinning device based on machine vision positioning according to claim 1 is characterized in that: A movable sliding observation window (6) is installed on the front side of the outer wall of the shell (1), and a supporting leg (5) is installed on the bottom of the outer wall of the shell (1).

6. The electronic chip surface tinning device based on machine vision positioning according to claim 1 is characterized by: A third motor (12) is mounted on the front of the inner wall of the housing (1), a third rotating shaft (13) is mounted on the back of the outer wall of the third motor (12), a transmission roller (14) is sleeved on the outer wall of the third rotating shaft (13), a conveyor belt (7) is sleeved on the outer wall of the transmission roller (14), and the conveyor belt (7) is used to transport a chip fixture on which an electronic chip is placed.

7. The electronic chip surface tinning device based on machine vision positioning according to claim 1 is characterized by: A visual positioning module is installed in the housing (1), and the visual positioning module is used to locate and identify the position parameters of the chip fixture in real time; The visual positioning module includes: an industrial camera (26), an LED light source (28) and an image processor (27); An industrial camera (26) is installed at the top of the inner wall of the housing (1), an image processor (27) is installed at the top of the inner wall of the housing (1), and the industrial camera (26) is connected to the image processor (27) via a data cable, an LED light source is installed at the bottom of the outer wall of the image processor (27) via a power cable, and the image processor (27) is connected to the intelligent control system via a data signal cable; The image processor (27) is equipped with a GPU to support real-time image processing. The image processor (27) has a built-in dedicated algorithm module, including edge detection, feature point recognition and image matching algorithms, and is based on an OpenCV customized software platform, integrating image enhancement, filtering, template matching and shape analysis functions.

8. The electronic chip surface tinning device based on machine vision positioning according to claim 1 is characterized by: A real-time detection module is installed on the back of the inner wall of the housing (1), and the real-time detection module is used to detect the tinning effect and provide information feedback; The real-time detection module includes: a laser scanning 3D vision sensor (30) and a defect recognition processor (29); A laser scanning 3D vision sensor (30) is installed on the back of the inner wall of the housing (1), a defect recognition processor (29) is installed on the back of the inner wall of the housing (1), and the laser scanning 3D vision sensor (30) is connected to the defect recognition processor (29) via a data cable; The defect recognition processor (29) has built-in machine learning and image analysis algorithms, which can automatically identify missing, excessive and offset solder point defect problems and connect to the dynamic solder brushing component via a wireless network.

9. The electronic chip surface tinning device based on machine vision positioning according to claim 1 is characterized by: The intelligent control system is used to analyze and adjust the tinning process in real time; The intelligent control system includes: a data acquisition unit, a data analysis unit and a remote control unit; The data acquisition unit receives the soldering process parameters in real time and detects abnormal conditions on the received feedback data; The data analysis unit uses a cloud computing-based big data analysis platform to analyze historical operation data, identify key factors affecting tinning quality, and adaptively optimize the tinning process through machine learning models; The remote control unit is connected to the tin brushing device through the industrial Internet, supporting remote fault diagnosis and parameter adjustment.

10. The electronic chip surface tinning device based on machine vision positioning according to claim 1, characterized in that: An ion exhaust fan (8) is installed on the side of the outer wall of the shell (1), and ion air ducts (31) are installed on both sides of the inner wall of the shell (1). A fourth motor (32) is installed at the bottom of the inner wall of the ion air duct (31), and a fourth rotating shaft (33) is installed at the bottom of the outer wall of the fourth motor (32). An ion fan (34) is sleeved on the outer wall of the fourth rotating shaft (33). A heating wire (35) is also connected to the ion air duct (31) at the outlet of the tin brushing device via a power line.

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