Light supplementing module of AOI detection equipment

Abstract

The utility model relates to an AOI detection equipment light supplementing module, and relates to the technical field of AOI detection, the AOI detection equipment light supplementing module comprises a workbench, the driving end of a three-axis driving mechanism on the workbench is detachably provided with a mounting seat, an image acquisition module is fixedly installed on the mounting seat, and the bottom of the mounting seat is fixedly connected with a lamp holder; an avoiding hole for exposing the image acquisition module is formed in the lamp holder in a penetrating manner, a mounting ring is fixedly connected to the bottom of the lamp holder, a plurality of light supplementing lamps are fixedly mounted on the inner wall of the mounting ring, and the light supplementing lamps are uniformly distributed on the surface of the inner wall of the mounting ring in a linear array manner; a plate conveying mechanism is fixedly installed on the table top of the workbench, a carrying table is installed on the plate conveying mechanism in a sliding mode, the plate conveying mechanism comprises a driving unit, and the driving unit drives the carrying table to slide in the direction close to or away from the installation base. The definition of the circuit board image data acquired by the image acquisition module can be improved.

Description

An AOI inspection equipment supplementary lighting module Technical Field

[0001] This application relates to the field of AOI inspection technology, and in particular to an AOI inspection equipment supplementary lighting module. Background Technology

[0002] AOI inspection equipment, or Automated Optical Inspection Equipment, is a device that uses optical principles to automatically inspect electronic products. In the PCB circuit board production process, circuit boards need to undergo appearance quality inspection before leaving the factory to prevent unqualified products from entering the market. However, manual inspection is inefficient, so AOI inspection equipment is needed to identify various defects on PCB circuit boards, automatically record and analyze the inspection results, and provide strong data support for quality control in the production process.

[0003] In existing technologies, common AOI (Automated Optical Inspection) equipment mainly includes a worktable, on which a mounting bracket and a placement platform are fixedly connected by bolts. A three-axis drive mechanism is mounted on the mounting bracket, and a mounting base is mounted on the three-axis drive mechanism. The mounting base is positioned above the placement platform and houses an image acquisition module and a supplementary light. After the operator fixes the circuit board to be inspected on the placement platform, the three-axis drive mechanism drives the mounting base to slide directly above the circuit board. The supplementary light illuminates the circuit board, and the image acquisition module captures the circuit image. The AOI equipment's built-in image processing module processes and analyzes the acquired circuit board image data, automatically identifying and marking defects on the circuit board.

[0004] However, because many electronic components of different positions and sizes are installed on the circuit board, the existing supplementary lights will cast shadows around the electronic components when supplementing light, making it difficult to provide a clear field of view for the image acquisition module and affecting the detection accuracy of the AOI inspection equipment. There is room for improvement. Summary of the Invention

[0005] In order to improve the clarity of the image data of the circuit board acquired by the image acquisition module and ensure the detection accuracy of the AOI inspection equipment, this application provides an AOI inspection equipment supplementary lighting module.

[0006] The supplementary lighting module for an AOI (Automated Optical Inspection) device provided in this application adopts the following technical solution:

[0007] An AOI (Automated Optical Inspection) equipment supplementary lighting module includes a worktable. A mounting base is detachably installed on the drive end of a three-axis drive mechanism on the worktable. An image acquisition module is fixedly installed on the mounting base. A lamp holder is fixedly connected to the bottom of the mounting base. An obstacle hole for exposing the image acquisition module is opened through the lamp holder. A mounting ring is fixedly connected to the bottom of the lamp holder. A plurality of supplementary lights are fixedly installed on the inner wall of the mounting ring. The plurality of supplementary lights are evenly arranged in a linear array on the inner wall surface of the mounting ring.

[0008] A plate feeding mechanism is fixedly installed on the workbench, and a platform is slidably installed on the plate feeding mechanism. The plate feeding mechanism includes a drive unit, which drives the platform to slide toward or away from the mounting base.

[0009] By adopting the above technical solution, when performing defect detection on a circuit board, the operator can place the circuit board to be inspected on a platform and transfer the platform to the underside of the mounting ring via a drive unit. Subsequently, the three-axis drive mechanism drives the image acquisition module to move along a given path and acquire image data of the points to be inspected on the circuit board. During the process of the image acquisition module acquiring image data of the circuit board, the supplementary lights on the inner wall of the mounting ring emit light. Multiple supplementary lights arranged in a ring emit light simultaneously, providing an all-round light source for the circuit board. This can effectively reduce the occurrence of shadows around electronic components in the circuit board images acquired by the image acquisition module, improve the clarity of the circuit board images acquired by the image acquisition module, and ensure the accuracy of subsequent defect analysis.

[0010] Preferably, the top of the mounting ring extends inward and is integrally formed with an extension portion, and the bottom of the extension portion and the inner sidewall of the mounting ring are coated with a diffuse reflection coating.

[0011] By adopting the above technical solution, the diffuse reflection coating on the bottom of the extension and the inner sidewall of the mounting ring can diffusely reflect the light emitted by the fill light, thereby changing the path of the light and making the light emitted by the fill light more comprehensively cover the electronic components on the surface of the circuit board, thus improving the fill light effect of the fill light.

[0012] Preferably, a connecting plate is fixedly connected to the top of the lamp holder, and two through holes for bolt rods to pass through are provided on the connecting plate;

[0013] The mounting base includes a mounting plate with two sets of mounting holes extending through it. The distance between the two sets of mounting holes is the same as the distance between the two through holes. The connecting plate is detachably mounted on the mounting base by bolting.

[0014] By adopting the above technical solution, when the operator installs the mounting base, the shank of the bolt can pass through the mounting hole and the shank hole in sequence through the through hole on the connecting plate, and a nut can be installed at the end of the bolt shank that extends out of the through hole, so that the mounting plate and the connecting plate are pressed against the bolt and the nut, thus realizing the connection between the lamp holder and the mounting base.

[0015] Preferably, two structural reinforcing ribs are fixedly connected between the top of the lamp holder and the connecting plate, and the two structural reinforcing ribs are located on both sides of the clearance hole.

[0016] By adopting the above technical solution, two structural reinforcing ribs are connected between the top of the lamp holder and the connecting plate, which can reduce the occurrence of lamp holder tilting and improve the stability of the lamp holder and mounting ring.

[0017] Preferably, the drive unit includes a servo motor, a lead screw, and a slide table; the plate feeding mechanism includes a base fixedly installed on the workbench surface; the base includes two opposing vertical plates; the two ends of the lead screw are rotatably connected to the two vertical plates respectively; the slide table is threaded onto the lead screw; and the bottom of the slide table is slidably connected to the base.

[0018] The drive shaft of the servo motor is connected to one end of the lead screw via a coupling, and the platform is fixedly installed on the top of the slide.

[0019] By adopting the above technical solution, after the operator places the circuit board to be tested on the platform, the operator can control the servo motor to drive the lead screw to rotate so that the slide can move. The movement of the slide can synchronously drive the platform to slide, and then the circuit board to be tested can be moved to the bottom of the mounting ring through the platform. After the supplementary light in the mounting ring is turned on and the image acquisition module has acquired the image data of the circuit board, the operator can control the servo motor to drive the lead screw to reverse so that the slide and platform can be reset.

[0020] Preferably, the top of the base is provided with a sliding groove adapted to the slide table, and two limiting sliders are integrally formed on both sides of the slide table. Limiting grooves adapted to the limiting sliders are respectively provided on the two side walls opposite to the sliding groove.

[0021] By adopting the above technical solution, the sliding trajectory of the slide table can be restricted by the slide groove, so that the slide table slides along the axial direction of the slide groove. By setting the limiting slider and the limiting groove, the occurrence of the slide table disengaging from the slide groove can be reduced.

[0022] Preferably, the tops of the two vertical plates are fixedly connected to guide plates, the top of the slide table is provided with a guide groove adapted to the guide plate, the platform is mounted above the opening of the guide groove, and the slide table is slidably connected to the guide plate.

[0023] By adopting the above technical solution, the sliding trajectory of the top of the slide table can be guided by the cooperation of the guide groove and the guide plate, which can further improve the stability of the platform.

[0024] In summary, the supplementary lighting module for an AOI inspection device proposed in this application has at least the following beneficial technical effects:

[0025] 1. During the process of the image acquisition module acquiring image data of the circuit board, the supplementary lights on the inner wall of the mounting ring emit light. The multiple supplementary lights arranged in a ring emit light at the same time, which can provide an all-round light source for the circuit board. This can effectively reduce the occurrence of shadows around the electronic components in the circuit board image acquired by the image acquisition module, improve the clarity of the circuit board image acquired by the image acquisition module, and ensure the accuracy of subsequent defect analysis.

[0026] 2. By setting a diffuse reflection coating on the bottom of the extension and the inner side wall of the mounting ring, the light emitted by the fill light can be diffusely reflected, which can change the path of the light and make the light emitted by the fill light more comprehensively cover the electronic components on the surface of the circuit board, thereby improving the fill light effect of the fill light. Attached Figure Description

[0027] Figure 1 is a schematic diagram illustrating the overall structure of the testing equipment according to an embodiment of this application.

[0028] Figure 2 is a schematic diagram illustrating the overall structure of the lamp holder according to an embodiment of this application.

[0029] Figure 3 is a schematic diagram illustrating the lamp holder connection structure according to an embodiment of this application.

[0030] Figure 4 is a schematic diagram illustrating the overall structure of the plate feeding mechanism according to an embodiment of this application.

[0031] Figure 5 is a schematic diagram illustrating the internal structure of the plate feeding mechanism according to an embodiment of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Worktable; 2. Three-axis drive mechanism; 3. Mounting base; 31. Image acquisition module; 32. Mounting plate; 33. Mounting hole; 4. Lamp holder; 41. Clearance hole; 42. Connecting plate;

[0033] 43. Through hole; 44. Structural reinforcing rib; 5. Mounting ring; 51. Fill light; 52. Extension; 6. Plate feeding mechanism; 61. Platform; 62. Servo motor; 63. Lead screw; 64. Slide table; 641. Limiting slider; 642. Guide groove; 65. Base; 651. Vertical plate; 652. Slide groove; 66. Guide plate. Detailed Implementation

[0034] The present application will be further described in detail below with reference to Figures 1-5.

[0035] Example

[0036] This application discloses an AOI (Automated Optical Inspection) detection equipment supplementary lighting module. Referring to Figures 1 and 2, it mainly includes a worktable 1. A mounting base 3 is detachably installed on the drive end of a three-axis drive mechanism 2 on the worktable 1. An image acquisition module 31 is fixedly installed on the mounting base 3 by screws. A lamp holder 4 is fixedly connected to the bottom of the mounting base 3. A clearance hole 41 for exposing the image acquisition module 31 is opened through the lamp holder 4. A mounting ring 5 is fixedly connected to the bottom of the lamp holder 4. A plurality of supplementary lights 51 are fixedly installed on the inner wall of the mounting ring 5. The plurality of supplementary lights 51 are arranged in a linear array and evenly distributed on the inner wall surface of the mounting ring 5. A plate feeding mechanism 6 is fixedly installed on the table surface of the worktable 1. A platform 61 is slidably installed on the plate feeding mechanism 6. The plate feeding mechanism 6 includes a drive unit, which drives the platform 61 to slide toward or away from the mounting base 3.

[0037] When performing defect inspection on a circuit board, the operator can place the circuit board to be inspected on the stage 61 and transfer the stage 61 to the underside of the mounting ring 5 via the drive unit. Subsequently, the three-axis drive mechanism 2 drives the image acquisition module 31 to move along a given path and acquire image data of the points to be inspected on the circuit board. During the process of the image acquisition module 31 acquiring image data of the circuit board, the supplementary lights 51 on the inner wall of the mounting ring 5 emit light. The multiple supplementary lights 51 arranged in a ring emit light simultaneously, which can provide an all-round light source for the circuit board. This can effectively reduce the occurrence of shadows around the electronic components in the circuit board image acquired by the image acquisition module 31, improve the clarity of the circuit board image acquired by the image acquisition module 31, and ensure the accuracy of subsequent defect analysis.

[0038] Referring to Figure 2, the top inner wall of the mounting ring 5 extends inward and is integrally formed with an extension portion 52. The bottom of the extension portion 52 and the inner sidewall of the mounting ring 5 are coated with a diffuse reflection coating.

[0039] By setting a diffuse reflection coating on the bottom of the extension 52 and the inner sidewall of the mounting ring 5, the light emitted by the fill light 51 can be diffusely reflected, which can change the path of the light and make the light emitted by the fill light 51 more comprehensively cover the electronic components on the surface of the circuit board, thereby improving the fill light effect of the fill light 51.

[0040] Referring to Figures 2 and 3, the top of the lamp holder 4 is fixed with a connecting plate 42 by integral bending. The connecting plate 42 has two through holes 43 for bolt rods to pass through. The mounting base 3 includes a mounting plate 32, which has two sets of mounting holes 33. The distance between the two sets of mounting holes 33 is the same as the distance between the two through holes 43. The connecting plate 42 is detachably mounted on the mounting base 3 by bolting.

[0041] When the operator installs the mounting base 3, the bolt shank can pass through the mounting hole 33 and the through hole 43 in sequence through the rod hole 43 on the connecting plate 42, and a nut can be installed at the end of the bolt shank that extends out of the through hole 43, so that the front and rear sides of the mounting plate 32 and the connecting plate 42 are pressed against the bolt and the nut, thus realizing the connection between the lamp holder 4 and the mounting base 3.

[0042] It should be noted that in this embodiment, each set of mounting holes 33 includes three mounting holes 33, which are evenly arranged in the vertical direction. The operator can install the lamp holder 4 through different mounting holes 33 according to the actual needs of use, thereby achieving the technical effect of adjusting the height of the lamp holder 4.

[0043] In this embodiment, two structural reinforcing ribs 44 are fixedly connected between the top of the lamp holder 4 and the connecting plate 42. The two structural reinforcing ribs 44 are located on both sides of the clearance hole 41. The connection between the top of the lamp holder 4 and the connecting plate 42 can reduce the occurrence of tilting of the lamp holder 4 and improve the stability of the lamp holder 4 and the mounting ring 5.

[0044] Referring to Figures 4 and 5, the drive unit includes a servo motor 62, a lead screw 63, and a slide 64. The plate feeding mechanism 6 includes a base 65 fixedly mounted on the table surface of the worktable 1. The base 65 includes two opposing vertical plates 651. The two ends of the lead screw 63 are rotatably connected to the two vertical plates 651 respectively. The slide 64 is threaded onto the lead screw 63, and the bottom of the slide 64 is slidably connected to the base 65. The drive shaft end of the servo motor 62 is connected to one end of the lead screw 63 through a coupling. The platform 61 is fixedly mounted on the top of the slide 64.

[0045] After the operator places the circuit board to be tested on the stage 61, the servo motor 62 can be controlled to drive the lead screw 63 to rotate, so that the slide 64 moves. The movement of the slide 64 can synchronously drive the stage 61 to slide, and then the circuit board to be tested can be moved to the underside of the mounting ring 5 through the stage 61. After the supplementary light 51 in the mounting ring 5 is turned on and the image acquisition module 31 has acquired the image data of the circuit board, the operator can control the servo motor 62 to drive the lead screw 63 to reverse, so that the slide 64 and the stage 61 are reset.

[0046] Referring to Figure 5, the top of the base 65 is provided with a slide groove 652 that is adapted to the slide table 64. Two limit sliders 641 are integrally formed on both sides of the slide table 64. Limiting grooves adapted to the limit sliders 641 are respectively provided on the two opposite side walls of the slide groove 652.

[0047] The sliding track 652 restricts the sliding trajectory of the slide table 64, allowing the slide table 64 to slide along the axial direction of the sliding track 652. The setting of the limiting slider 641 and the limiting groove reduces the occurrence of the slide table 64 disengaging from the sliding track 652.

[0048] Referring to Figures 4 and 5, guide plates 66 are fixedly connected to the tops of the two vertical plates 651. A guide groove 642, matching the guide plate 66, is provided through the top of the slide table 64. The platform 61 is mounted above the opening of the guide groove 642, and the slide table 64 is slidably connected to the guide plate 66. The cooperation between the guide groove 642 and the guide plate 66 guides the sliding trajectory of the top of the slide table 64, further improving the stability of the platform 61.

[0049] The implementation principle of the supplementary lighting module of the AOI inspection equipment in this application embodiment is as follows: When performing defect inspection on a circuit board, the operator can place the circuit board to be inspected on the stage 61 and transfer the stage 61 to the underside of the mounting ring 5 through the drive unit; then, the three-axis drive mechanism 2 drives the image acquisition module 31 to move along the given path and acquire image data of the points to be inspected on the circuit board. During the process of the image acquisition module 31 acquiring image data of the circuit board, the supplementary lights 51 on the inner wall of the mounting ring 5 emit light. The multiple supplementary lights 51 arranged in a ring emit light at the same time, which can provide an all-round light source for the circuit board. This can effectively reduce the occurrence of shadows around the electronic components in the circuit board image acquired by the image acquisition module 31, improve the clarity of the circuit board image acquired by the image acquisition module 31, and ensure the accuracy of subsequent defect analysis.

[0050] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A supplementary lighting module for an AOI (Automated Optical Inspection) device, characterized in that, The system includes a worktable (1), on which a mounting base (3) is detachably mounted on the drive end of a three-axis drive mechanism (2). An image acquisition module (31) is fixedly mounted on the mounting base (3). A lamp holder (4) is fixedly connected to the bottom of the mounting base (3). An obstacle hole (41) for exposing the image acquisition module (31) is provided through the lamp holder (4). A mounting ring (5) is fixedly connected to the bottom of the lamp holder (4). Several fill lights (51) are fixedly mounted on the inner wall of the mounting ring (5). The fill lights (51) are arranged in a linear array and evenly distributed on the inner wall surface of the mounting ring (5). A plate feeding mechanism (6) is fixedly mounted on the table surface of the worktable (1). A platform (61) is slidably mounted on the plate feeding mechanism (6). The plate feeding mechanism (6) includes a drive unit. The drive unit drives the platform (61) to slide towards or away from the mounting base (3).

2. The supplementary lighting module for an AOI inspection device according to claim 1, characterized in that, The top of the mounting ring (5) extends inward and is integrally formed with an extension portion (52). The bottom of the extension portion (52) and the inner wall of the mounting ring (5) are coated with a diffuse reflection coating.

3. The supplementary lighting module for an AOI inspection device according to claim 2, characterized in that, The top of the lamp holder (4) is fixedly connected to a connecting plate (42), and the connecting plate (42) has two through holes (43) for bolt rods to pass through; the mounting base (3) includes a mounting plate (32), and the mounting plate (32) has two sets of mounting holes (33) through it. The distance between the two sets of mounting holes (33) is the same as the distance between the two through holes (43). The connecting plate (42) is detachably mounted on the mounting base (3) by bolting.

4. The supplementary lighting module for an AOI inspection device according to claim 3, characterized in that, Two structural reinforcing ribs (44) are fixedly connected between the top of the lamp holder (4) and the connecting plate (42), and the two structural reinforcing ribs (44) are located on both sides of the clearance hole (41).

5. The supplementary lighting module for an AOI inspection device according to claim 4, characterized in that, The drive unit includes a servo motor (62), a lead screw (63), and a slide (64). The plate feeding mechanism (6) includes a base (65) fixedly installed on the table surface of the workbench (1). The base (65) includes two opposing vertical plates (651). The two ends of the lead screw (63) are rotatably connected to the two vertical plates (651) respectively. The slide (64) is threaded onto the lead screw (63), and the bottom of the slide (64) is slidably connected to the base (65). The drive shaft end of the servo motor (62) is connected to one end of the lead screw (63) through a coupling. The platform (61) is fixedly installed on the top of the slide (64).

6. The supplementary lighting module for an AOI inspection device according to claim 5, characterized in that, The top of the base (65) is provided with a slide groove (652) that is compatible with the slide table (64). Two limit sliders (641) are integrally formed on both sides of the slide table (64). Limiting grooves that are compatible with the limit sliders (641) are respectively provided on the two opposite side walls of the slide groove (652).

7. The supplementary lighting module for an AOI inspection device according to claim 6, characterized in that, The top of the two vertical plates (651) is fixedly connected to a guide plate (66), and the top of the slide (64) is provided with a guide groove (642) that is adapted to the guide plate (66). The platform (61) is mounted above the opening of the guide groove (642), and the slide (64) is slidably connected to the guide plate (66).

Images