Low-gravity-center stable high-precision online AOI (automatic optical inspection) machine

Abstract

The utility model discloses a low-gravity-center stable high-precision online AOI detection machine which comprises a bottom plate, the top of the bottom plate is connected with a bottom-layer square tube frame, and the top of the bottom-layer square tube frame is further connected with a middle-layer supporting plate. A top-layer square tube frame is further mounted at the top of the middle-layer supporting plate; and the product conveying device is mounted at the top of the middle-layer supporting plate, and the product conveying device is at least used for conveying a to-be-detected product. Through the design of the two layers of frameworks, the gravity center of the equipment structure can be lowered to the lower part of the equipment, and when the equipment works, the stable operation of the equipment can be ensured, so that the detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of AOI detection, in particular to a high-precision online AOI detector with a low center of gravity and stable type. Background Art

[0002] The AOI inspection machine is mainly used for inspecting the appearance defects of components on the circuit board. During operation, the circuit board enters the device through the belt track, and then passes through the device camera to scan the PCB at high speed. When scanning, the image of the PCB is quickly collected. The pictures of the components and solder joints collected on the PCB are compared with the qualified pictures or set parameters defined in advance in the software. After internal image algorithm processing, the appearance defects on the PCB are detected, and the defects are automatically displayed and marked through the display for professional technicians to make actual defect judgments. However, the existing AOI inspection machines have the following deficiencies:

[0003] 1) The center of gravity of the AOI inspection machine is in the middle of the device, resulting in the device being prone to shaking during the inspection process, thus causing misjudgment and affecting the inspection results;

[0004] 2) A lead screw is used in the Y-axis direction, but the 3D detection head is heavy, which easily causes uneven power on both sides, resulting in a large positioning error and affecting the detection accuracy;

[0005] 3) The transmission belt is made of rubber material, which is prone to dust falling and breaking. The generated dust will cause secondary pollution to the PCB board, and the dust falling inside the machine during use is easily inhaled into the human body, resulting in diseases such as respiratory infections. At the same time, the belt break will cause the entire production line to stop, resulting in problems such as progress delay, efficiency decline and economic losses. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a high-precision online AOI detector with a low center of gravity and stable type. Through the design of two-layer skeletons, the center of gravity of the device structure can be reduced to the lower part of the device. When the device is working, the stable operation of the device can be ensured, thereby improving the detection accuracy. At the same time, the transmission belt module adopts a high-flexible steel wire conveyor belt with high temperature resistance and anti-static properties, which has high wear resistance and can solve the problems such as progress delay and efficiency decline caused by dust falling and breaking of the conventional transmission belt, and has strong practicability.

[0007] To achieve the above purpose, the following technical solutions are adopted:

[0008] A high-precision online AOI detector with a low center of gravity and stable type, comprising

[0009] a bottom plate, the top of the bottom plate is connected with a bottom layer square tube frame, and the top of the bottom layer square tube frame is also connected with a middle layer support plate; the top of the middle layer support plate is also provided with a top layer square tube frame;

[0010] A product transfer device, which is installed on the top of the middle-layer support plate, and the product transfer device is at least used to transfer products to be detected;

[0011] An AOI detection device, which includes a first Y-axis translation mechanism installed on the top-layer square pipe frame, a first X-axis translation mechanism connected to the first Y-axis translation mechanism, a first Z-axis lifting mechanism connected to the first X-axis translation mechanism, and a first lifting seat connected to the first Z-axis lifting mechanism and located above the product transfer device; a ring light source is installed at the bottom of the first lifting seat, and a plurality of detection cameras are also installed at intervals on the outer wall circumference of the first lifting seat.

[0012] Further, a plurality of camera fixing seats are installed at intervals on the outer wall circumference of the first lifting seat, and an inclined surface with its lower part inclined towards the first lifting seat is also provided on one side of each camera fixing seat; each of the detection cameras is installed on an inclined surface, and the end of each detection camera for emitting light is arranged towards the direction of the ring light source.

[0013] Further, the top-layer square pipe frame includes two first support frames, the two first support frames are arranged in parallel at intervals and are respectively installed at one end of the top of the middle-layer support plate; there are two first Y-axis translation mechanisms, and each of the first Y-axis translation mechanisms is respectively arranged on the top of a first support frame; the first X-axis translation mechanism includes an X-axis translation seat with its two ends respectively connected to a first Y-axis translation mechanism, and a translation driving mechanism installed on the X-axis translation seat; the first Z-axis lifting mechanism is connected to the translation driving mechanism; the product transfer device is arranged between the two first support frames.

[0014] Further, the product transfer device includes a transfer fixing frame, a transfer sliding frame, and a spacing adjusting mechanism; the transfer fixing frame and the transfer sliding frame are arranged in parallel at intervals, the transfer fixing frame is fixedly installed on the top of the middle-layer support plate, and the transfer sliding frame is slidably connected to the top of the middle-layer support plate; transfer belt modules are also installed on one side of the transfer fixing frame and the transfer sliding frame; a transfer motor assembly is also installed on the transfer fixing frame and the transfer sliding frame, and each transfer motor assembly is respectively connected to a transfer belt module; the spacing adjusting mechanism is installed on the top of the middle-layer support plate, and the spacing adjusting mechanism is connected to the transfer sliding frame; the spacing adjusting mechanism is used to drive the transfer sliding frame to perform a translation motion.

[0015] Further, the spacing adjustment mechanism includes an adjustment screw rod, a transmission screw rod, and a rotating motor; one end of the adjustment screw rod is arranged close to the transmission sliding frame, and an adjustment nut is also installed on the adjustment screw rod; one end of the adjustment screw rod is connected to the transmission sliding frame through the adjustment nut, and the other end of the adjustment screw rod passes through the transmission fixed frame movably; the rotating motor is connected to the end of the adjustment screw rod that passes through the transmission fixed frame movably, and a driving wheel is also installed at the end of the adjustment screw rod that passes through the transmission fixed frame movably; the other end of the transmission screw rod is arranged close to the transmission sliding frame, and a transmission nut is also installed on the transmission screw rod; one end of the transmission screw rod is connected to the transmission sliding frame through the transmission nut, and the other end of the transmission screw rod passes through the transmission fixed frame movably; a driven wheel is also installed at the end of the transmission screw rod that passes through the transmission fixed frame movably; a synchronous belt is wound between the driving wheel and the driven wheel.

[0016] Further, a plurality of blocking mechanisms are also installed at intervals in the length direction of the tops of the transmission fixed frame and the transmission sliding frame.

[0017] Further, the blocking mechanism includes a blocking cylinder and a blocking block connected to the blocking cylinder.

[0018] Further, a limiting plate is installed on the top of each of the transmission fixed frame and the transmission sliding frame, and one side of the limiting plate extends upward toward the upper part of the conveyor belt module.

[0019] Adopting the above scheme, the beneficial effects of the present utility model are as follows:

[0020] Through the design of two layers of skeletons, the center of gravity of the equipment structure can be lowered to the lower part of the equipment. When the equipment is working, the stable operation of the equipment can be ensured, thereby improving the detection accuracy. At the same time, the conveyor belt module adopts a high-flexible steel wire conveyor belt with high temperature resistance and anti-static properties, which has high wear resistance and can solve problems such as progress delay and efficiency decline caused by dust falling and breakage of conventional conveyor belts, and has strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a structural schematic diagram of the present utility model;

[0022] Figure 2 is a structural schematic diagram of the AOI detection device of the present utility model;

[0023] Figure 3 is a structural schematic diagram of the product transmission device of the present utility model;

[0024] Figure 4 is Figure 3 a top view of;

[0025] Among them, the description of the attached drawing reference numerals:

[0026] 1. Bottom plate; 2. Bottom square pipe frame; 3. Middle layer support plate; 4. Top square pipe frame; 5. Product transmission device; 6. AOI detection device; 7. Blocking mechanism; 8. Limiting plate; 51. Transmission fixing frame; 52. Transmission sliding frame; 53. Spacing adjustment mechanism; 54. Transmission belt module; 55. Transmission motor assembly; 61. First Y-axis translation mechanism; 62. First X-axis translation mechanism; 63. First Z-axis lifting mechanism; 64. First lifting seat; 65. Ring light source; 66. Detection camera; 67. Camera fixing seat; 531. Adjusting screw rod; 532. Driving screw rod; 533. Rotating motor; 534. Driving wheel; 535. Driven wheel; 536. Synchronous belt. Detailed implementation manners

[0027] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Referring to Figures 1 to 4 as shown, the present utility model provides a high-precision online AOI detector with a low center of gravity and stable type. In one embodiment, it includes

[0029] a bottom plate 1, the top of the bottom plate 1 is connected with a bottom square pipe frame 2, and the top of the bottom square pipe frame 2 is further connected with a middle layer support plate 3; the top of the middle layer support plate 3 is further installed with a top square pipe frame 4;

[0030] a product transmission device 5, the product transmission device 5 is installed on the top of the middle layer support plate 3, and the product transmission device 5 is at least used for transmitting products to be detected;

[0031] an AOI detection device 6, the AOI detection device 6 includes a first Y-axis translation mechanism 61 installed on the top square pipe frame 4, a first X-axis translation mechanism 62 connected to the first Y-axis translation mechanism 61, a first Z-axis lifting mechanism 63 connected to the first X-axis translation mechanism 62, and a first lifting seat 64 connected to the first Z-axis lifting mechanism 63 and located above the product transmission device 5; a ring light source 65 is installed at the bottom of the first lifting seat 64, and a plurality of detection cameras 66 are also installed at intervals on the outer wall circumference of the first lifting seat 64.

[0032] In this embodiment, it further includes a chassis. The bottom plate 1, the product transmission device 5, and the AOI detection device 6 are all installed inside the chassis. The bottom plate 1 is the bottom plate 1 of the chassis. Casters and feet are also installed at the bottom of the bottom plate 1. A workbench and a display screen are provided on the front of the chassis, and a three-color warning light is installed on the top of the chassis. At the same time, the top-layer square tube frame 4 includes two first support frames, which are arranged in parallel at intervals and are respectively installed at one end of the top of the middle-layer support plate 3. There are two first Y-axis translation mechanisms 61, and each first Y-axis translation mechanism 61 is respectively arranged on the top of a first support frame. The first X-axis translation mechanism 62 includes an X-axis translation seat whose two ends are respectively connected to a first Y-axis translation mechanism 61, and a translation driving mechanism installed on the X-axis translation seat. The first Z-axis lifting mechanism 63 is connected to the translation driving mechanism. The product transmission device 5 is arranged between the two first support frames.

[0033] In this embodiment, the first Y-axis translation mechanism 61, the first X-axis translation mechanism 62, and the first Z-axis lifting mechanism 63 all adopt the transmission mode of a motor and a lead screw (precision ground lead screw). In order to ensure the stability of detection, there are two groups of first Y-axis translation mechanisms 61, which are respectively driven by a main shaft motor and a slave shaft motor. The main shaft motor and the slave shaft motor are distributed on the left and right sides of the top-layer square tube frame 4. The X-axis translation seat is fixed in a flat way and is connected to a first Y-axis translation mechanism 61 at both ends through a surrounding method. A first Z-axis lifting mechanism 63 is installed on one side of the X-axis translation seat. The first Z-axis lifting mechanism 63 is drivingly connected to a detection camera 66. With the mutual cooperation of the first Y-axis translation mechanism 61, the first X-axis translation mechanism 62, and the first Z-axis lifting mechanism 63, the detection camera 66 can be driven to perform translational and lifting movements, thereby facilitating the detection of the products on the product transmission device 5.

[0034] In this embodiment, the bottom plate 1 and the bottom layer square pipe frame 2 are welded with high-rigidity large square pipes, and then welded with the middle layer support plate 3. The whole is milled on a gantry milling machine. After overall machining, the bases of the upper and lower surfaces can achieve consistency. At the same time, the top layer square pipe frame 4 is also welded by square pipes. After overall machining, the upper and lower mounting surfaces are consistent. The whole is connected by an assembly method. In this way, the installation benchmarks in the plane directions of the detection camera 66 and the conveying track are unified. Since the main way to improve the efficiency during equipment detection lies in the stable images during imaging, and in this method, the lower side is the center of gravity in terms of structural weight. When the X, Y, and Z-axis translation mechanisms are linked, even if the acceleration and deceleration are very large, the center of gravity of the equipment will not drift. In this way, the equipment can also achieve the high stability effect of a linear motor when using a grinding lead screw, thereby reducing costs. In addition, the detection camera 66 is installed on the first Z-axis lifting mechanism 63. In this way, the movement space range of the detection camera 66, that is, the upper space range, is fixed. In the front view of the mechanism, it can be seen that the space in the Z-axis direction has been compressed to the extreme. This ensures the reasonable use of the middle layer track. The lower center of gravity of the upper part makes the whole machine test of the equipment more stable and makes the volume of the whole machine smaller, and the equipment runs more stably.

[0035] In one embodiment, a plurality of camera fixing seats 67 are installed at intervals in the circumferential direction of the outer wall of the first lifting seat 64, and an inclined surface with its lower part inclined towards the first lifting seat 64 is also provided on one side of each camera fixing seat 67; each detection camera 66 is installed on an inclined surface, and the end of each detection camera 66 for emitting light is arranged towards the direction of the annular light source 65. By providing a plurality of detection cameras 66, the detection range can be increased and the detection efficiency can be improved.

[0036] In one embodiment, the product transmission device 5 includes a transmission fixing frame 51, a transmission sliding frame 52, and a spacing adjustment mechanism 53; the transmission fixing frame 51 and the transmission sliding frame 52 are arranged in parallel at intervals, and the transmission fixing frame 51 is fixedly installed on the top of the middle layer support plate 3, and the transmission sliding frame 52 is slidably connected to the top of the middle layer support plate 3 (slidably connected thereto through a slide rail assembly); transmission belt modules 54 are also installed on one side of the transmission fixing frame 51 and the transmission sliding frame 52; transmission motor components 55 are also installed on the transmission fixing frame 51 and the transmission sliding frame 52, and each transmission motor component 55 is respectively connected to a transmission belt module 54; the spacing adjustment mechanism 53 is installed on the top of the middle layer support plate 3, and the spacing adjustment mechanism 53 is connected to the transmission sliding frame 52; the spacing adjustment mechanism 53 is used to drive the transmission sliding frame 52 to perform a translational movement.

[0037] In this embodiment, the conveyor belt module 54 uses a high-flex steel wire conveyor belt that is resistant to high temperatures and anti-static, with high wear resistance, which can solve problems such as progress delays and efficiency reduction caused by dust dropping and breakage of conventional conveyor belts. At the same time, a spacing adjustment mechanism 53 is provided to adjust the spacing between the conveyor fixed frame 51 and the conveyor sliding frame 52 to meet the transmission requirements of products of different specifications and sizes.

[0038] In one embodiment, the spacing adjustment mechanism 53 includes an adjustment screw rod 531, a transmission screw rod 532, and a rotary motor 533. One end of the adjustment screw rod 531 is arranged close to the conveyor sliding frame 52, and an adjustment nut is also installed on the adjustment screw rod 531. One end of the adjustment screw rod 531 is connected to the conveyor sliding frame 52 through the adjustment nut, and the other end of the adjustment screw rod 531 passes through the conveyor fixed frame 51 movably. The rotary motor 533 is connected to the end of the adjustment screw rod 531 that passes through the conveyor fixed frame 51 movably, and a driving wheel 534 is also installed at the end of the adjustment screw rod 531 that passes through the conveyor fixed frame 51 movably. The transmission screw rod 532 is arranged at the other end close to the conveyor sliding frame 52, and a transmission nut is also installed on the transmission screw rod 532. One end of the transmission screw rod 532 is connected to the conveyor sliding frame 52 through the transmission nut, and the other end of the transmission screw rod 532 passes through the conveyor fixed frame 51 movably. A driven wheel 535 is also installed at the end of the transmission screw rod 532 that passes through the conveyor fixed frame 51 movably. A synchronous belt 536 is wound between the driving wheel 534 and the driven wheel 535.

[0039] Driven by the rotary motor 533, the adjustment screw rod 531 can be driven to operate. At the same time, the transmission screw rod 532 can be driven to operate synchronously through the driving wheel 534, the synchronous belt 536, and the driven wheel 535, so as to drive the conveyor sliding frame 52 to approach or move away from the conveyor fixed frame 51 to adjust the spacing between the two. In this embodiment, the adjustment screw rod 531 and the transmission screw rod 532 are respectively arranged at both ends of the conveyor sliding frame 52, so that the conveyor sliding frame 52 can be evenly stressed and the stability of its movement can be ensured.

[0040] In one embodiment, a plurality of blocking mechanisms 7 are also installed at intervals in the length direction of the tops of the conveyor fixed frame 51 and the conveyor sliding frame 52. The blocking mechanism 7 includes a blocking cylinder and a blocking block connected to the blocking cylinder. Driven by the blocking cylinder, the blocking block can be driven to extend, so as to stop the product, so as to detect the product. At the same time, a limiting plate 8 is installed on the tops of the conveyor fixed frame 51 and the conveyor sliding frame 52 respectively, and one side of the limiting plate extends upward toward the conveyor belt module 54. The installation of the limiting plate 8 can limit the product in the Z-axis direction during product transmission to ensure the stability of product transmission.

[0041] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A low-center-of-gravity, stable, high-precision online AOI inspection machine, characterized in that: include A bottom plate, the top of which is connected to a bottom square frame, and the top of which is also connected to a middle support plate; the top of the middle support plate is also installed with a top square frame; A product transmission device, the product transmission device is installed on the top of the middle support plate, and the product transmission device is at least used to transmit the product to be tested; The AOI detection device includes a first Y-axis translation mechanism installed on the top-level square frame, a first X-axis translation mechanism connected to the first Y-axis translation mechanism, a first Z-axis lifting mechanism connected to the first X-axis translation mechanism, and a first lifting seat connected to the first Z-axis lifting mechanism and located above the product transmission device; an annular light source is installed at the bottom of the first lifting seat, and a plurality of detection cameras are also installed at intervals on the circumference of the outer wall of the first lifting seat.

2. The low-center-of-gravity stable high-precision online AOI inspection machine according to claim 1, characterized in that: A plurality of camera fixing seats are installed at intervals on the circumference of the outer wall of the first lifting seat, and one side of each camera fixing seat is also provided with an inclined surface whose lower part is inclined toward the direction of the first lifting seat; each of the detection cameras is installed on an inclined surface, and one end of each detection camera for emitting light is arranged toward the direction of the annular light source.

3. The low-center-of-gravity stable high-precision online AOI inspection machine according to claim 1, characterized in that: The top-level square frame includes two first support frames, which are arranged in parallel and spaced apart and are respectively installed at one end of the top of the middle-level support plate; two first Y-axis translation mechanisms are provided, and each of the first Y-axis translation mechanisms is respectively arranged at the top of a first support frame; the first X-axis translation mechanism includes an X-axis translation seat whose two ends are respectively connected to a first Y-axis translation mechanism, and a translation drive mechanism installed on the X-axis translation seat; the first Z-axis lifting mechanism is connected to the translation drive mechanism; and the product transmission device is arranged between the two first support frames.

4. The low-center-of-gravity stable high-precision online AOI inspection machine according to claim 1, characterized in that: The product transmission device includes a transmission fixed frame, a transmission sliding frame, and a spacing adjustment mechanism; the transmission fixed frame and the transmission sliding frame are arranged in parallel and spaced apart, and the transmission fixed frame is fixedly installed on the top of the middle support plate, and the transmission sliding frame is slidably connected to the top of the middle support plate; a transmission belt module is also installed on one side of the transmission fixed frame and the transmission sliding frame; a transmission motor assembly is also installed on the transmission fixed frame and the transmission sliding frame, and each transmission motor assembly is respectively connected to a transmission belt module; the spacing adjustment mechanism is installed on the top of the middle support plate, and the spacing adjustment mechanism is connected to the transmission sliding frame; the spacing adjustment mechanism is used to drive the transmission sliding frame to perform translational motion.

5. The low-center-of-gravity stable high-precision online AOI inspection machine according to claim 4, characterized in that: The gear train is connected with the transmission frame via a transmission nut, and the other end of the gear train is connected with the transmission frame via a transmission nut, and the other end of the gear train is connected with the transmission frame via a transmission nut; the gear train is connected with the transmission frame via a transmission nut, and the other end of the gear train is connected with the transmission frame via a transmission nut; the gear train is connected with the transmission frame via a transmission nut, and the other end of the gear train is connected with the transmission frame via a transmission nut; the gear train is connected with the transmission frame via a transmission nut, and the other end of the gear train is connected with the transmission frame via a transmission nut; the gear train is connected with the transmission frame via a transmission nut, and the other end of the gear train is connected with the transmission frame via a driven wheel; a synchronous belt is also wound around the driving wheel and the driven wheel.

6. The low-center-of-gravity stable high-precision online AOI inspection machine according to claim 4, characterized in that: A plurality of blocking mechanisms are installed at intervals in the length direction of the top of the transmission fixed frame and the transmission sliding frame.

7. The low-center-of-gravity stable high-precision online AOI inspection machine according to claim 6, characterized in that: The blocking mechanism comprises a blocking cylinder and a blocking block connected to the blocking cylinder.

8. The low-center-of-gravity stable high-precision online AOI inspection machine according to claim 4, characterized in that: A limiting plate is also installed on the top of the transmission fixed frame and the transmission sliding frame, and one side of the limiting plate is extended toward the top of the transmission belt module.

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