Detection equipment for identifying surface defects of PCB (Printed Circuit Board)

Abstract

The invention relates to the technical field of printed circuit boards, in particular to PCB surface defect identification detection equipment which comprises a supporting base frame, a detection case erected on the supporting base frame and a case top frame installed on the detection case. A detector is arranged on the case top frame, a bearing assembly and a positioning assembly located on the periphery of the bearing assembly are erected on the detection case, the bearing assembly is arranged under the detector, and the positioning assembly corresponds to the sensing end of the detector; the bearing assembly comprises a detection frame and a detection base disc arranged on the detection frame, and a rotation adjusting disc is arranged in the center of the detection base disc; positioning reference supports and adjusting reference bases are further arranged on the detection base disc, adjusting pushing pieces are arranged on the adjusting reference bases, and the adjusting pushing pieces correspond to the corresponding positioning reference supports in a one-to-one mode. The method has remarkable advantages in the aspect of accurate mechanical positioning, and provides powerful support for quality detection of the PCB.

Description

Technical Field

[0001] The invention relates to the technical field of printed circuit boards, in particular to a detection device for identifying surface defects of PCB boards. Background Art

[0002] As the support and connection carrier of electronic components, the quality of PCB is directly related to the performance and reliability of the entire electronic product. With the improvement of the integration of electronic products, the position of PCB in the information industry is becoming more and more important, and it has become the pillar industry of electronic information. The manufacturing process of PCB is complex and delicate, and omissions in any link may lead to product quality problems.

[0003] The existing technology generally uses AOI (automatic optical inspection system) for automatic identification and detection, and scans the PCB by controlling the light source, digital imaging, scanning and other subsystems to obtain the image of the PCB. Perform alignment, feature extraction and comparative analysis. However, the positioning structure of the existing PCB board inspection equipment has certain defects. Some PCB boards used for miniaturized electronic products are precision products and the PCB boards are not completely rectangular structures. The positioning accuracy of the existing structure of such products is insufficient, resulting in a certain deviation between the acquired image and the standard position, which causes a certain deviation between the defect coordinates output by AOI and the actual position, affecting the subsequent repair of the PCB board by personnel. Summary of the invention

[0004] The purpose of the present invention is to provide a PCB board surface defect detection device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A device for detecting surface defects of PCB boards, comprising a supporting base frame, a detection chassis mounted on the supporting base frame, and a chassis top frame installed on the detection chassis; a detector is arranged on the chassis top frame, a bearing assembly and a positioning assembly located at the periphery of the bearing assembly are mounted on the detection chassis, the bearing assembly is arranged directly below the detector, and the positioning assembly corresponds to the sensing end of the detector; the bearing assembly comprises a detection frame and a detection base plate arranged on the detection frame, a rotating adjustment plate is arranged at the center of the detection base plate; a positioning reference support and an adjustment reference base are also arranged on the detection base plate, the positioning reference support and the adjustment reference base are both provided with a plurality of and fixedly mounted on the detection base plate, the positioning reference support and the adjustment reference base are both arranged at the periphery of the rotating adjustment plate, and an adjustment pusher is arranged on the adjustment base plate, and the adjustment pusher is in one-to-one correspondence with the corresponding positioning reference support.

[0006] As a further solution of the present invention: a fixed sleeve and a fixed support frame installed on the fixed sleeve are arranged on the side edge of the frame of the detection frame, and an inclined support plate is arranged inside the frame of the detection frame.

[0007] As a further solution of the present invention: the detection base includes a main disk body and a reference seat mounting surface provided on the upper surface of the main disk body, the reference seat mounting surface is provided with a plurality of mounting holes, the mounting holes are regularly arranged on the periphery of the rotating adjustment disk and constitute an installation coordinate system; the reference seat mounting surface is also provided with a plurality of reference seat mounting plates, the reference seat mounting plates are fixedly mounted on the installation coordinate system through locking holes, and the positioning reference support and the adjustment reference base are fixed on the corresponding reference seat mounting plates.

[0008] As a further solution of the present invention: the rotating adjustment disk comprises an upper rotating disk and a plurality of magnetic blocks arranged on the upper rotating disk, a lower rotating hoop is arranged at the bottom of the upper rotating disk, a rotating outer ring is arranged on the periphery of the lower rotating hoop, an outer ring surface of the rotating outer ring is arranged with an outer tooth pattern, a steering drive motor is also fixedly installed at the bottom of the main disk body, and a driving end of the steering drive motor is arranged with a transmission gear meshing with the outer tooth pattern, As a further solution of the present invention: the frame base of the detection frame is a hollow frame structure, and a frame bottom plate is installed on the frame base of the detection frame, and a number of vertical fine-tuning supports are arranged on the frame bottom plate, and the vertical fine-tuning supports include a fixed bracket and a main disk frame block, the fixed bracket is fixedly installed on the frame bottom plate, and the main disk frame block is fixedly installed on the lower surface of the main disk body, and a fine-tuning motor is installed on the fixed bracket, and an electric-driven lifting rod is installed on the pushing end of the fine-tuning motor, and the rod end of the electric-driven lifting rod is fixedly installed on the main disk frame block through a top sleeve.

[0009] As a further solution of the present invention: a reinforcing support ring and a limiting inner support are also installed on the upper surface of the frame bottom plate, the limiting inner support is provided with a plurality of and is installed on the periphery of the reinforcing support ring, a vertical pin is provided on the limiting inner support, the vertical pin supports and slidably installs a supporting inner frame, and the top of the supporting inner frame is fixed to the lower surface of the main disk body through a fixing plate.

[0010] As a further solution of the present invention: the adjustment reference base is provided with a middle branch mounting port and a plurality of side branch mounting ports arranged on the side edge of the middle branch mounting port, the adjustment pusher includes an adjustment screw rod installed in the middle branch mounting port and an outer branch base plate and a resistance base plate arranged at both ends of the adjustment screw rod, a plurality of sliding rods are installed in the side branch mounting port, the sliding rods are supported on the edge corners of the outer branch base plate and the resistance base plate, and the outer branch base plate is also externally connected to a pusher for driving the middle branch mounting port.

[0011] As a further solution of the present invention: the detector includes an optical detector mounted on the top frame of the chassis and a detection camera end arranged on the optical detector, and the optical detector is also provided with an additional frame, and a photosensitive aligner is installed on the additional frame; the photosensitive aligner includes an aligner substrate installed on the additional frame, a mounting sleeve opened on the aligner substrate and a plurality of photosensitive sensors mounted on the aligner substrate plate body, and a photosensitive head is arranged on the photosensitive sensor.

[0012] As a further solution of the present invention: the optical head is inserted into the sleeve body of the mounting sleeve, and a plurality of side wing limiting strips are arranged on the sleeve edge of the mounting sleeve, and the side wing limiting strips are limited to the edge of the barrel of the optical head.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention ensures that the relative position between the PCB board and the detector is accurate through precise mechanical positioning, thereby improving the accuracy of defect identification; the fine adjustment of the detection part is achieved by the bearing component and the positioning component, which can adapt to the positioning fine adjustment of PCB boards of different sizes and shapes, thereby improving the versatility and flexibility of the equipment; the precise mechanical positioning reduces the adjustment and calibration time during the detection process, thereby improving the detection efficiency. The present invention shows significant advantages in precise mechanical positioning, and provides strong support for the quality detection of PCB boards.

[0014] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings herein are incorporated into and constitute a part of the specification to illustrate embodiments consistent with the present application and are used together with the specification to explain the principles of the present application. At the same time, these drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application for those skilled in the art by referring to specific embodiments.

[0016] Figure 1 A schematic diagram of the overall structure of a PCB surface defect detection device provided in an embodiment of the present invention.

[0017] Figure 2 A schematic diagram of the installation of a bearing assembly and a positioning assembly provided in an embodiment of the present invention.

[0018] Figure 3 A schematic structural diagram of a bearing assembly provided in an embodiment of the present invention.

[0019] Figure 4 For the present invention Figure 3 Schematic diagram of the structure of area A in the middle.

[0020] Figure 5 A schematic diagram of the structure of a detection frame provided in an embodiment of the present invention.

[0021] Figure 6 A schematic diagram of the bottom viewing angle structure of a detection base provided in an embodiment of the present invention.

[0022] Figure 7 For the present invention Figure 6 Schematic diagram of the structure of area B.

[0023] Figure 8 For the present invention Figure 6 Schematic diagram of the structure of the middle C region.

[0024] Fig. 9 A schematic structural diagram of an adjusting pusher provided in an embodiment of the present invention.

[0025] Fig.10 A schematic diagram of the structure of a detector provided in an embodiment of the present invention.

[0026] Fig.11 A schematic diagram of the structure of a light sensing aligner provided in an embodiment of the present invention.

[0027] In the figure: 11, support base frame; 12, detection chassis; 13, chassis top frame; 14, detector; 15, CNC chassis; 16, bearing assembly; 17, positioning assembly; 21, detection frame; 22, detection base plate; 23, rotating adjustment plate; 24, positioning reference support; 25, adjusting reference base; 26, adjusting pusher; 31, fixed sleeve; 32, fixed support frame; 33, tilting support plate; 34, main plate body; 35, reference seat mounting surface; 36, installation coordinate system; 37, mounting hole; 38, reference seat mounting plate; 39, locking hole; 41, upper edge rotating disk; 42, magnetic suction block; 43, lower edge rotating hoop; 44, steering drive motor; 45, rotating outer ring; 46. ​​External tooth pattern; 51. Reinforced support ring; 52. Limit inner support; 53. Vertical fine-tuning support; 54. Frame bottom plate; 56. Vertical pin; 57. Support inner frame; 58. Fixed plate; 61. Fixed bracket; 62. Fine-tuning motor; 63. Electric drive lifting rod; 64. Top sleeve; 65. Main plate frame block; 71. Middle branch mounting port; 72. Side branch mounting port; 73. Adjusting screw rod; 74. External support base plate; 75. Resistance base plate; 76. Sliding rod; 77. Pusher; 81. Optical detector; 82. Detection camera end; 83. Additional frame; 84. Light sensor aligner; 91. Aligner base plate; 92. Mounting sleeve; 93. Light sensor; 94. Side wing limit strip; 95. Light sensor head. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0029] Obviously, the described embodiments are only some embodiments of the present invention, not all 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.

[0030] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0031] For example, see Figure 1 and Figure 2 , provides a PCB board surface defect detection device, including a supporting base frame 11, a detection chassis 12 mounted on the supporting base frame 11, and a chassis top frame 13 installed on the detection chassis 12; a detector 14 is arranged on the chassis top frame 13, a bearing component 16 and a positioning component 17 located on the periphery of the bearing component 16 are mounted on the detection chassis 12, the bearing component 16 is arranged directly below the detector 14, and the positioning component 17 corresponds to the sensing end of the detector 14.

[0032] The bearing assembly 16 includes a detection frame 21 and a detection base 22 arranged on the detection frame 21, and a rotating adjustment disk 23 is arranged at the center position of the detection base 22; a positioning reference support 24 and an adjustment reference base 25 are also arranged on the detection base 22, and the positioning reference support 24 and the adjustment reference base 25 are both provided with a plurality of and fixedly installed on the detection base 22, and the positioning reference support 24 and the adjustment reference base 25 are both arranged on the periphery of the rotating adjustment disk 23, and an adjustment pusher 26 is arranged on the adjustment reference base 25, and the adjustment pusher 26 corresponds one-to-one to the corresponding positioning reference support 24.

[0033] This embodiment is based on the AOI detection system, which consists of a light source and its control subsystem, a digital imaging and its control subsystem (including a CCD / CMOS camera, graphic acquisition), an image scanning motion mechanism and its control subsystem, an image processing and optimization subsystem, an image feature recognition and defect identification subsystem, an HMI and a main control subsystem, etc.

[0034] During routine testing, the PCB board needs to be placed on a pallet fixture of the corresponding model and protected by the pallet fixture. In the following, the PCB board and the pallet fixture are collectively referred to as the test piece for ease of explanation.

[0035] The support base frame 11 is the support structure of the entire detection equipment. The support base frame 11 is made of high-strength, corrosion-resistant metal materials to ensure the stability and durability of the equipment. The detection chassis 12 is mounted on the support base frame 11, and the chassis top frame 13 is fixedly installed on the top of the detection chassis 12 to support and fix the detector 14. The support base frame 11 is provided with a CNC chassis 15 for CNC adjustment of the entire detection equipment. The detector 14 is installed on the chassis top frame 13 and uses a high-precision, high-resolution industrial camera or laser scanner to capture image data on the surface of the PCB board. The detector 14 is connected to the control system and can transmit image data to the data processing unit for analysis in real time.

[0036] The detection frame 21 is made of high-strength material to ensure the stability and durability of the overall structure. The detection base 22 is installed on the detection frame 21 and is used to place the detection piece. The rotating adjustment plate 23 is located at the center of the detection base 22 and is driven by a high-precision motor to achieve the rotation adjustment of the detection piece. The positioning reference support 24 and the adjustment reference base 25 are both fixedly installed on the detection base 22 to ensure the stability of the detection piece during the detection process. The positioning reference support 24 is used to preliminarily locate the position of the detection part. The adjustment reference base 25 is arranged relative to the positioning reference support 24. The size and height of the positioning reference support 24 and the adjustment reference base 25 can be determined according to the size model of the detection part (PCB board and corresponding support fixture). The detection part uses the positioning reference support 24 at one end as the reference coordinate, and fits one side of the detection part against the surface of the positioning reference support 24. The corresponding adjustment pusher 26 on the adjustment reference base 25 can be fine-tuned according to the actual size of the detection part to ensure that the relative position of the detection part and the detector 14 is accurate.

[0037] The sensing end of the detector 14 can monitor the position and posture of the detection part in real time through optical signals. The control system feeds back the amplitude of the rotating adjustment disk 23 and the adjustment pusher 26 that need to be fine-tuned according to the information fed back by the sensing end until the detection part reaches the optimal detection position. Subsequently, the detector 14 starts working, captures the image data of the PCB board, and performs defect identification.

[0038] This embodiment ensures the relative position of the PCB board and the detector 14 is accurate through precise mechanical positioning, thereby improving the accuracy of defect identification; the fine adjustment of the detection part is achieved by the bearing component 16 and the positioning component 17, which can adapt to the positioning fine adjustment of PCB boards of different sizes and shapes, improve the versatility and flexibility of the equipment, and the precise mechanical positioning reduces the adjustment and calibration time during the detection process, thereby improving the detection efficiency. This embodiment shows significant advantages in precise mechanical positioning, and provides strong support for the quality detection of PCB boards.

[0039] For example 2, please refer to Figure 2 and Figure 3 Based on the contents of the above embodiment, the specific implementation structure of the detection frame 21 and the detection base 22 is designed as follows: A fixing sleeve 31 and a fixing support frame 32 installed on the fixing sleeve 31 are arranged on the side edge of the detection frame 21 . An inclined support plate 33 is arranged inside the detection frame 21 to ensure the stability of the installation of the entire detection frame 21 .

[0040] The detection base 22 includes a main disk body 34 and a reference seat mounting surface 35 provided on the upper surface of the main disk body 34, and a plurality of mounting holes 37 are provided on the reference seat mounting surface 35. The mounting holes 37 are regularly arranged on the periphery of the rotating adjustment disk 23 and constitute a mounting coordinate system 36; a plurality of reference seat mounting plates 38 are also provided on the reference seat mounting surface 35, and the reference seat mounting plates 38 are fixedly mounted on the mounting coordinate system 36 through locking holes 39, and the positioning reference support 24 and the adjustment reference base 25 are fixed on the corresponding reference seat mounting plates 38.

[0041] The main plate body 34 is the main structure of the detection base plate 22. The upper surface of the main plate body 34 is designed with a precision-machined reference seat mounting surface 35, on which a number of mounting holes 37 are evenly distributed. These mounting holes 37 are arranged in a specific pattern to form a mounting coordinate system 36. This coordinate system not only provides a mounting reference for the reference seat mounting plate 38, but also provides an accurate positioning reference for the entire detection process; during the adjustment process, it can be quickly positioned. The operator only needs to install the positioning reference support 24 and the adjustment reference base 25 according to the marks on the coordinate system, and the positioning work can be completed quickly and accurately. During the detection process, if the position or angle of the PCB board needs to be adjusted, the installation coordinate system 36 provides an intuitive reference. The operator can make quick adjustments based on the scale or digital display on the coordinate system, reducing the adjustment time and error.

[0042] For example 3, please refer to Figure 2 , Figure 3 and Figure 4 Based on the contents of the above embodiment, the specific implementation structure of the rotating adjustment disk 23 is designed as follows: The rotating adjustment disk 23 includes an upper rotating disk 41 and a plurality of magnetic blocks 42 arranged on the upper rotating disk 41. A lower rotating hoop 43 is arranged at the bottom of the upper rotating disk 41. A rotating outer ring 45 is arranged on the periphery of the lower rotating hoop 43. An outer ring surface of the rotating outer ring 45 is provided with an outer tooth pattern 46. A steering drive motor 44 is also fixedly installed at the bottom of the main disk body 34. A driving end of the steering drive motor 44 is provided with a transmission gear meshing with the outer tooth pattern 46.

[0043] In this embodiment, the upper rotating disk 41 cooperates with the lower rotating hoop 43 to form a stable rotating structure. The several magnetic blocks 42 on the upper rotating disk 41 can firmly adsorb the detection part to ensure that the detection part does not shake during fine-tuning or detection. The steering drive motor 44 is fixedly installed at the bottom of the main disk body 34, and its driving end is provided with a transmission gear meshing with the outer tooth pattern 46. When the steering drive motor 44 is started, the rotation angle of the rotating outer ring 45 is accurately controlled through the meshing transmission of the transmission gear and the outer tooth pattern 46. Since the rotating outer ring 45 is connected to the lower rotating hoop 43, it drives the upper rotating disk 41 and the detection part to make precise angle adjustments to adjust the detection part to the corresponding angle orientation.

[0044] Example 4: Sometimes there are some components with large height differences on the PCB board, such as special components such as crystal oscillators and infrared tubes, so that the focus height of these special components is different from other areas. Based on the above situation, please refer to Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 , this embodiment is also designed as follows: The frame base of the detection frame 21 is a hollow frame structure, and a frame bottom plate 54 is installed on the frame base of the detection frame 21. A plurality of vertical fine-tuning supports 53 are arranged on the frame bottom plate 54. The vertical fine-tuning supports 53 include a fixed bracket 61 and a main disk frame block 65. The fixed bracket 61 is fixedly installed on the frame bottom plate 54, and the main disk frame block 65 is fixedly installed on the lower surface of the main disk body 34. A fine-tuning motor 62 is installed on the fixed bracket 61, and an electric-driven lifting rod 63 is installed at the pushing end of the fine-tuning motor 62. The rod end of the electric-driven lifting rod 63 is fixedly installed with the main disk frame block 65 through a top sleeve 64.

[0045] The frame base of the detection frame 21 adopts a hollow frame structure, and the frame bottom plate 54 is firmly installed on the frame base of the detection frame 21, serving as the installation base of the vertical fine-tuning support 53. The fine-tuning motor 62 is installed on the fixed bracket 61, and its driving end is connected to the electric drive lifting rod 63. The fine-tuning motor 62 adopts a high-precision stepping motor or servo motor to ensure the precise control of the lifting action. Through the precise control of the fine-tuning motor 62 and the electric drive lifting rod 63, the height position of the main plate 34 can be fine-tuned to ensure that the detection camera or other sensors can be aligned with the special components on the surface of the PCB board at the best angle. This design significantly improves the accuracy and comprehensiveness of the detection when processing PCB boards with complex shapes or tilted features.

[0046] In one case of this embodiment, see Figure 5 and Figure 8A reinforcing support ring 51 and a limiting inner support 52 are also installed on the upper surface of the frame bottom plate 54. The limiting inner support 52 is provided with a plurality of and is installed on the periphery of the reinforcing support ring 51. A vertical pin 56 is provided on the limiting inner support 52. The vertical pin 56 supports and slidably installs a supporting inner frame 57. The top of the supporting inner frame 57 is fixed to the lower surface of the main disk body 34 through a fixing plate 58.

[0047] The introduction of the reinforcing support ring 51 effectively enhances the overall stability of the frame bottom plate 54 and the structure above it, providing a solid foundation for height fine-tuning. This helps to reduce errors caused by structural instability during fine-tuning, thereby improving fine-tuning accuracy. The limited inner supports 52 are evenly distributed on the periphery of the reinforcing support ring 51, further stabilizing the support structure and ensuring the stability of the vertical pins 56 and the inner support frame 57 during fine-tuning.

[0048] For example 5, please refer to Figure 2 and Fig. 9 Based on the contents of the above embodiment, the specific implementation structure of the adjusting pusher 26 is designed as follows: The adjustment reference base 25 is provided with a middle branch mounting opening 71 and a plurality of side branch mounting openings 72 provided on the side edge of the middle branch mounting opening 71. The adjustment pusher 26 includes an adjustment screw rod 73 installed in the middle branch mounting opening 71 and an outer branch base plate 74 and a resistance base plate 75 provided at both ends of the adjustment screw rod 73. A plurality of slide bars 76 are installed in the side branch mounting opening 72. The slide bars 76 are supported on the edge corners of the outer branch base plate 74 and the resistance base plate 75. The outer branch base plate 74 is also externally connected to a pusher 77 for driving the middle branch mounting opening 71. A resistance gasket is installed on the resistance base plate 75. The resistance gasket contacts the edge of the detection member to play a role of buffering and protection.

[0049] During adjustment, the support plate fixture at the bottom of the overall detection part can be first placed on the magnetic block 42 in the area of ​​the upper rotating disk 41, so that the detection part is subjected to the force of the magnetic block 42. This force will prevent the detection part from shaking, but will not affect the translation of the detection part; the adjustment pusher 26 cooperates with the adsorption effect of the magnetic block 42, and the distance between the outer support base plate 74 and the resistance base plate 75 can be accurately controlled by rotating the adjustment screw 73, thereby realizing the horizontal position adjustment of the detection part, and positioning the detection part in the horizontal direction with the outer adjustment reference base 25 and the positioning reference support 24, so as to maintain the overall stability.

[0050] Example 6, please refer to Figure 1 , Fig.10 and Fig.11 Based on the contents of the above embodiment, the specific implementation structure of the adjusting pusher 26 is designed as follows: The detector 14 includes an optical detector 81 mounted on the chassis top frame 13 and a detection camera end 82 arranged on the optical detector 81. The optical detector 81 is also provided with an additional frame 83, and a photosensitive aligner 84 is installed on the additional frame 83; the photosensitive aligner 84 includes an aligner substrate 91 installed on the additional frame 83, a mounting sleeve 92 opened on the aligner substrate 91 and a plurality of photosensitive sensors 93 mounted on the plate body of the aligner substrate 91, and a photosensitive head 95 is arranged on the photosensitive sensor 93.

[0051] The optical head 95 is inserted into the sleeve body of the installation sleeve 92 . A plurality of side wing limiting strips 94 are arranged on the sleeve edge of the installation sleeve 92 . The side wing limiting strips 94 are limited at the edge of the barrel body of the optical head 95 .

[0052] In this embodiment, a photosensitive aligner 84 is further provided on the detector 14 to position and calibrate the detection part. The photosensitive aligner 84 can accurately position and calibrate the PCB board. The photosensitive head 95 integrated on the photosensitive sensor 93 is made of highly sensitive photoelectric elements. The positioning reference support 24 or the abutting substrate 75 can be provided with corresponding photosensitive components. After the PCB positioning is completed, the photosensitive aligner 84 is used to perform self-inspection of the positioning accuracy.

[0053] In terms of structural design, the optical head 95 is inserted from one end of the mounting sleeve 92 until it is completely inserted into the sleeve body of the mounting sleeve 92. During the insertion process, it is important to keep the axis of the optical head 95 consistent with the axis of the mounting sleeve 92. Then, the side limit strip 94 is used to limit and fix the edge of the barrel of the optical head 95, so as to ensure that the optical head 95 itself does not shake and ensure the accuracy of the self-testing device itself.

[0054] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0055] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A PCB surface defect detection device, comprising a supporting base frame (11), a detection chassis (12) mounted on the supporting base frame (11), and a chassis top frame (13) mounted on the detection chassis (12); characterized in that: A detector (14) is arranged on the chassis top frame (13), a bearing assembly (16) and a positioning assembly (17) located outside the bearing assembly (16) are arranged on the detection chassis (12), the bearing assembly (16) is arranged directly below the detector (14), and the positioning assembly (17) corresponds to the sensing end of the detector (14); The bearing assembly (16) comprises a detection frame (21) and a detection base plate (22) arranged on the detection frame (21), and a rotating adjustment plate (23) is arranged at the center position of the detection base plate (22); The detection base (22) is also provided with a positioning reference support (24) and an adjustment reference base (25). The positioning reference support (24) and the adjustment reference base (25) are both provided with a plurality of and fixedly mounted on the detection base (22). The positioning reference support (24) and the adjustment reference base (25) are both arranged on the periphery of the rotating adjustment disk (23). The adjustment reference base (25) is provided with an adjustment pusher (26), and the adjustment pusher (26) is in one-to-one correspondence with the corresponding positioning reference support (24).

2. The PCB surface defect detection device according to claim 1, characterized in that: A fixed sleeve (31) and a fixed support frame (32) mounted on the fixed sleeve (31) are provided on the side edge of the frame body of the detection frame (21), and an inclined support plate (33) is provided inside the frame body of the detection frame (21).

3. The PCB surface defect detection device according to claim 1, characterized in that: The detection base plate (22) comprises a main plate body (34) and a reference seat mounting surface (35) provided on the upper surface of the main plate body (34); a plurality of mounting holes (37) are provided on the reference seat mounting surface (35); the mounting holes (37) are regularly arranged on the periphery of the rotating adjustment plate (23) and form a mounting coordinate system (36); A plurality of reference seat mounting plates (38) are also provided on the reference seat mounting surface (35); the reference seat mounting plates (38) are fixedly mounted on the mounting coordinate system (36) through locking holes (39); and the positioning reference support (24) and the adjustment reference base (25) are fixed on corresponding reference seat mounting plates (38).

4. The PCB surface defect detection device according to claim 3 is characterized in that: The rotating adjustment disk (23) comprises an upper rotating disk (41) and a plurality of magnetic blocks (42) arranged on the upper rotating disk (41); a lower rotating hoop (43) is arranged at the bottom of the upper rotating disk (41); a rotating outer ring (45) is arranged on the periphery of the lower rotating hoop (43); and an outer ring surface of the rotating outer ring (45) is provided with external tooth patterns (46); A steering drive motor (44) is also fixedly mounted on the bottom of the main disk body (34), and a driving end of the steering drive motor (44) is provided with a transmission gear meshing with the external tooth pattern (46).

5. The PCB surface defect detection device according to claim 4, characterized in that: The frame base of the detection frame (21) is a hollow frame structure, a frame bottom plate (54) is installed on the frame base of the detection frame (21), and a plurality of vertical fine-tuning supports (53) are arranged on the frame bottom plate (54); The vertical fine-tuning support (53) comprises a fixed bracket (61) and a main disk frame block (65); the fixed bracket (61) is fixedly mounted on the frame bottom plate (54); the main disk frame block (65) is fixedly mounted on the lower surface of the main disk body (34); a fine-tuning motor (62) is mounted on the fixed bracket (61); an electric-driven lifting rod (63) is mounted on the driving end of the fine-tuning motor (62); and the rod end of the electric-driven lifting rod (63) is fixedly mounted on the main disk frame block (65) via a top sleeve (64).

6. The PCB surface defect detection device according to claim 5, characterized in that: The upper surface of the frame bottom plate (54) is also installed with a reinforcing support ring (51) and a limiting inner support (52). The limiting inner support (52) is provided with a plurality of and is installed on the periphery of the reinforcing support ring (51). The limiting inner support (52) is provided with a vertical pin (56). The vertical pin (56) supports and slidably installs a supporting inner frame (57). The top of the supporting inner frame (57) is fixed to the lower surface of the main disk body (34) through a fixing plate (58).

7. The PCB surface defect detection device according to any one of claims 1 to 6, characterized in that: The adjustment reference base (25) is provided with a middle branch mounting opening (71) and a plurality of side branch mounting openings (72) arranged on the side edge of the middle branch mounting opening (71); the adjustment pusher (26) comprises an adjustment screw rod (73) installed in the middle branch mounting opening (71) and an outer branch base plate (74) and a contact base plate (75) arranged at both ends of the adjustment screw rod (73); a plurality of slide bars (76) are further installed in the side branch mounting opening (72); the slide bars (76) are supported at the edge corners of the outer branch base plate (74) and the contact base plate (75); and a pusher (77) for driving the middle branch mounting opening (71) is also externally connected to the outer branch base plate (74).

8. The PCB surface defect detection device according to claim 7, characterized in that: The detector (14) comprises an optical detector (81) mounted on the top frame (13) of the chassis and a detection camera end (82) arranged on the optical detector (81); an additional frame (83) is further provided on the optical detector (81); and a light sensing aligner (84) is installed on the additional frame (83); The photosensitive aligner (84) comprises an aligner substrate (91) mounted on the additional frame (83), a mounting sleeve (92) opened on the aligner substrate (91), and a plurality of photosensitive sensors (93) mounted on the aligner substrate (91), wherein the photosensitive heads (95) are arranged on the photosensitive sensors (93).

9. The PCB surface defect detection device according to claim 8, characterized in that: The optical head (95) is inserted into the sleeve body of the mounting sleeve (92), and a plurality of side wing limiting strips (94) are provided on the sleeve edge of the mounting sleeve (92), and the side wing limiting strips (94) are limited to the edge of the barrel body of the optical head (95).

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