CN216560315U - Online AOI optical inspection machine of circuit board - Google Patents
Online AOI optical inspection machine of circuit board Download PDFInfo
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- CN216560315U CN216560315U CN202123155247.5U CN202123155247U CN216560315U CN 216560315 U CN216560315 U CN 216560315U CN 202123155247 U CN202123155247 U CN 202123155247U CN 216560315 U CN216560315 U CN 216560315U
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Abstract
The utility model discloses an online AOI optical detection machine for a circuit board, which comprises a transmission mechanism and a detection mechanism, wherein the transmission mechanism comprises a transmission mechanism and a detection mechanism; the conveying mechanism comprises an upper conveying belt device, a lower conveying belt device and a plate feeding auxiliary conveying device, and vacuum adsorption devices are arranged in the upper conveying belt device and the lower conveying belt device; the detection mechanism comprises an upper acquisition mechanism and a lower acquisition mechanism, each acquisition mechanism comprises a plurality of acquisition camera components, each acquisition camera component is arranged on an independent camera adjusting device, and the camera adjusting devices can adjust the X direction, the Z direction and the angle theta direction; the two acquisition mechanisms are divided into an upper acquisition mechanism and a lower acquisition mechanism which are respectively used for detecting the upper surface and the lower surface of the circuit board. The advantages of the utility model include: the transmission stability is good, and the problem of image blurring caused by warping of the circuit board can be solved; the mechanism stability is good, and the resolution and the definition of the acquisition camera assembly are consistent; easy debugging and maintenance, low cost and easy processing.
Description
Technical Field
The utility model relates to the technical field of optical detection, in particular to an online AOI optical detection machine for a circuit board.
Background
In the current industry, for online AOI (Automated Optical Inspection) Optical detection equipment for a PCB/FPC, which is herein referred to as a circuit board, the core principle is that an image acquisition system matches and matches with the transmission speed of the circuit board to ensure the authenticity of an acquired image, and AOI software can compare the acquired image with a standard data image for detection and then output a detection result. The online AOI optical detection equipment mainly comprises two important parts, namely a conveying mechanism and a detection mechanism.
A conveying mechanism: the transmission mechanism is used for providing stable transmission speed for the detection mechanism, and the image acquisition system of the transmission mechanism is matched with the transmission speed of the circuit board to obtain a real image of the circuit board and provide an image basis for detection software. The transmission mode adopted by the existing industry comprises the steps that a power roller combination is adopted as a pinch roller mechanism for transmission; some manufacturers also use power belts as the pinch roller mechanism for delivery.
The roller pinch roller mechanism has the following defects:
1) performance: the speed of the power roller or the speed of the power belt is unequal to the transmission speed, so that the phenomena of slipping, contusion and the like of the circuit board when passing through the acquisition area are caused, the accuracy of image acquisition is influenced, and the detection result is influenced.
2) The roller is difficult to process and high in cost: for the drum-type transmission, according to the camera parameters and the detection precision requirement, the calculated full-run-out requirement of the equipment on the drum processing is very high, the standard specification size of an industrial circuit board is 28' width, the drum processing with the length is very difficult to achieve the processing precision run-out, and the cost is very high; (e.g., roller size: diameter 45, length 950, full runout tolerance within 0.01 mm).
3) Service life: after the roller is used for a long time, the full run-out is gradually increased under the influence of load and self stress deformation, so that the roller is scrapped and needs to be replaced, and the service life is short; the belt is made of polyurethane or other materials, and is subjected to friction transmission with the circuit board for a long time, so that the belt is easy to wear, frequently needs to be replaced and has short service life;
4) efficiency and debugging: the gap and the parallelism between the power roller or the power belt and the circuit board are difficult to adjust and are affected by the unevenness of the circuit board, the gap between the roller or the belt and the circuit board is often required to be adjusted, and the production efficiency is low.
The belt pinch rollers adopted in the industry at present have two types, one is designed horizontally in front and back of two sections of belts, as shown in figure 6-1; the other is a three-section belt design, wherein two sections are horizontally designed at the lower part in front and back, a third section is designed above the middle position of the two sections of belts for flattening, and the three sections of belts adopt the same power transmission, as shown in figure 6-2. The disadvantages of both types of belt drives are:
1) the two-section belt transmission mode has low universality and low detection precision; for some thin plates with the thickness of less than 0.2mm, the warping phenomenon is easy to occur, so that the image of a warping part is blurred, and the detection precision is influenced;
2) the three-section belt transmission mode has low transmission precision; the three belts adopt the same power device, the transmission directions of the upper conveyor belt and the lower conveyor belt are required to be opposite, a group of reverse idler transfer structures exist in the process, and the problem that the transmission speed difference exists between the upper conveyor belt and the lower conveyor belt directly after multi-stage transmission, so that the transmission precision is influenced.
3) The three-section belt transmission mode is difficult to debug and maintain, the universality is not strong, the upper and lower three-section belts adopt the same power, the interval between the upper and lower transmission belts is only limited in the range of belt tensioning and loosening, the belt transmission mode is only suitable for the range of products with the thickness difference of 2-3mm, and the position of an idler pulley needs to be readjusted for products with the thickness exceeding the range.
The detection mechanism comprises: the detection mechanism is used for accurately acquiring image information of the circuit board and comprises an upper detection mechanism and a lower detection mechanism, a plurality of line scanning cameras are adopted by manufacturers at home and abroad at present for image acquisition, and the line scanning cameras are basically in a direct fixed type. The disadvantages of this fixing are: the single camera cannot adjust the direction, so that the resolution and the definition of each acquisition camera are different, and the detection result is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide an online AOI optical detection machine for a circuit board, which is used for solving the problems in the prior art: 1) the problem of unstable transmission in a transmission mechanism in the industry at present is solved; 2) the problem of image blurring caused by warping of a circuit board is solved; 3) the problem of equipment debugging and maintenance difficulty is solved.
The technical scheme adopted by the utility model is as follows: an online AOI optical inspection machine for circuit boards comprises a transmission mechanism and an inspection mechanism; the conveying mechanism comprises an upper conveying belt device, a lower conveying belt device and a plate feeding auxiliary conveying device, and vacuum adsorption devices are arranged in the upper conveying belt device and the lower conveying belt device; the detection mechanism comprises an upper acquisition mechanism and a lower acquisition mechanism, each acquisition mechanism comprises a plurality of acquisition camera components, each acquisition camera component is arranged on an independent camera adjusting device, and the camera adjusting devices can adjust the X direction, the Z direction and the angle theta direction; the two acquisition mechanisms are divided into an upper acquisition mechanism and a lower acquisition mechanism which are respectively used for detecting the upper surface and the lower surface of the circuit board.
In one possible implementation manner, vacuum holes are formed in both the upper conveyor belt in the upper conveyor belt device and the lower conveyor belt in the lower conveyor belt device, and the vacuum adsorption device includes a vacuum chuck matched with the vacuum holes.
In one possible implementation manner, a vacuum groove is formed in the vacuum chuck in the Y direction corresponding to the vacuum hole, the width of a notch of the vacuum groove is larger than the diameter of the vacuum hole, and the length of the notch is larger than the hole distance between two adjacent vacuum holes in the Y direction.
In a possible implementation manner, the upper conveyor further includes an upper conveyor Z-axis; the upper conveying belt is arranged on the Z axis of the upper conveying belt, is driven by the Z axis of the upper conveying belt to move up and down and is used for adjusting the gap between the upper conveying belt and the lower conveying belt according to the thickness of the circuit board.
In one possible implementation manner, the upper conveyor belt and the lower conveyor belt are respectively controlled by motors with the same specification parameters.
In a possible implementation manner, the plate feeding auxiliary conveying device comprises a plurality of auxiliary conveying rollers, a plate feeding guide plate and a thickness measuring device.
In a possible implementation manner, an upper acquisition camera assembly in the upper acquisition mechanism is mounted on an upper acquisition Z axis, and the upper acquisition Z axis drives the upper acquisition Z axis to move up and down, so that the height of the upper acquisition camera assembly is adjusted according to the thickness of the circuit board to achieve the purpose of fixing or compensating for the change of the focal length.
In one possible implementation, the collection camera assembly includes a line scan camera and a light source system that are collocated with a line scan lens.
In a possible implementation manner, the upper conveyor is arranged above the middle position between the plate feeding auxiliary conveyor and the lower conveyor, and is located right above the lower collecting mechanism; the upper collecting mechanism is positioned above the lower conveying belt device.
In a possible implementation manner, the conveying mechanism further includes a plate discharging conveying device arranged behind the lower conveying device.
According to the technical scheme, the embodiment of the utility model has the following advantages:
1) conveying stability: the conveying mechanism adopts the design of upper and lower conveying belts and vacuum, so that the smoothness and stability of conveying of an image acquisition area are ensured, the conveying stability is improved, and the problem of image blurring caused by PCB warping is solved.
2) The stability of the mechanism: every collection camera all designs on independent camera adjusting device, and the device design has the guiding mechanism of X direction, Y direction and angle theta direction, can adjust all cameras to same operating condition, and resolution, definition are unanimous.
3) Easy debugging and maintenance: the upper and lower conveyor belts are separately controlled and conveyed, and each camera is arranged on an independent camera adjusting device, so that the camera is very easy to debug and maintain.
4) Low cost and easy processing: compared with the pinch roller conveying, the conveying belt conveying device has the advantages that the conveying belt is adopted for conveying, the requirement on the machining of the idler wheels is reduced, and the cost is also reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the embodiments and the drawings used in the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a conveyor device of a circuit board on-line AOI optical inspection machine according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a lower conveyor belt device of an AOI optical inspection machine for circuit boards according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a board feeding auxiliary conveying device of an AOI optical inspection machine for a circuit board according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an upper collecting mechanism of an AOI optical inspection machine for a circuit board according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a complete structure of an on-line AOI optical inspection machine for circuit boards according to an embodiment of the present invention;
figures 6-1 and 6-2 are schematic diagrams of two prior art belt press wheels, respectively.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," and the like in the description and in the claims, and in the above-described drawings, are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The present invention will be described in detail with reference to the following examples.
Referring to fig. 1 to 5, an embodiment of the present invention provides an on-line AOI optical inspection machine for circuit boards. The detection machine comprises a conveying mechanism and a detection mechanism.
The technical scheme adopted by the utility model mainly comprises the following steps:
the conveying mechanism is provided with an upper conveying belt device and a lower conveying belt device, the circuit board is conveyed by adopting an upper conveying belt and a lower conveying belt, the upper conveying belt device and the lower conveying belt device are both provided with vacuum adsorption devices, the vacuum adsorption devices such as vacuum suckers are arranged in the upper conveying belt and the lower conveying belt, vacuum holes are correspondingly formed in the upper conveying belt and the lower conveying belt, and the stability of the circuit board during conveying is ensured through vacuum adsorption; furthermore, the upper conveying belt is independently arranged on the Z axis of the upper conveying belt, and the gap between the upper conveying belt and the lower conveying belt can be adjusted according to the thickness of the product, so that the universal conveying belt is used for general products with various thicknesses.
The detection mechanism is provided with an upper acquisition mechanism and a lower acquisition mechanism at the staggered position of the detection area, so that the upper surface and the lower surface of the circuit board can be simultaneously detected, and the detection efficiency is improved. The upper acquisition mechanism and the lower acquisition mechanism are respectively composed of a plurality of same acquisition camera components (comprising a line scanning camera, a line scanning lens and a light source system); and the upper acquisition mechanism is arranged on the upper acquisition Z axis, the acquisition height can be automatically adjusted for circuit boards with different thicknesses, and the lower acquisition mechanism is fixed in the lower rack to ensure that the acquisition height is fixed. Every gathers camera subassembly and all designs on camera adjusting device, and the device design has the guiding mechanism of a plurality of directions such as X direction, Z direction and angle theta direction, can adjust all gather camera subassemblies to same operating condition, and resolution, definition are unanimous.
1) Conveying mechanism
The conveying mechanism mainly comprises an upper conveying belt device, a lower conveying belt device and a board feeding auxiliary conveying device.
1.1 Upper conveyor Assembly
As shown in fig. 1, which is a schematic view of the upper conveyor apparatus, an upper conveyor 19 is mounted below the upper conveyor mounting plate 14 by two upper conveyor transfer shafts 18 and one upper conveyor tensioning shaft 16, and is driven by an upper conveyor transfer motor 15; an upper conveyor belt vacuum chuck 17 is designed in the upper conveyor belt 19, and vacuum holes on the upper conveyor belt vacuum chuck 17 correspond to the vacuum holes on the upper conveyor belt 19 in position and are matched with the vacuum holes. Optionally, a vacuum groove is formed in the vacuum chuck in the Y direction corresponding to the vacuum hole, the width of a notch of the vacuum groove is larger than the diameter of the vacuum hole, and the length of the notch is larger than the pitch of two adjacent vacuum holes in the Y direction.
Whole device is fixed on the lift Z axle that contains a motor at least through last conveyer belt mounting panel 14, and is different according to the width of product and conveyer belt, can design a plurality of motors and improve the stability of structure, and the lift Z axle comprises elevator motor 11, lead screw 12, guide rail 13 etc.. The vacuum adsorption device can enable a Printed Circuit Board (PCB) to be flatly adsorbed on the upper conveying belt 19 when the PCB is conveyed, so that the conveying stability is improved, and the problem that the PCB is blurred due to warping is solved.
1.2 lower conveyer belt device
As shown in fig. 2, which is a schematic view of the lower conveyor apparatus, the lower conveyor 24 is mounted on a lower conveyor mounting seat 26 through a lower conveyor driving shaft 22 and a lower conveyor driven shaft 23, and is driven by a lower conveyor conveying motor 21, a lower conveyor tensioning shaft 27 is mounted below, a lower conveyor vacuum chuck 25 is designed on the lower conveyor mounting seat 26, and is located inside the lower conveyor 24, and a vacuum hole is designed on the lower conveyor vacuum chuck 25 and is matched with the vacuum hole on the lower conveyor 24 correspondingly. The vacuum adsorption device can enable the PCB to be smoothly adsorbed on the lower conveying belt 24 during conveying, so that the conveying stability is improved, and the problem that the image of the PCB is fuzzy due to warping is solved.
1.3 advance supplementary conveyer of board
As shown in fig. 3, a schematic diagram of an auxiliary feeding device, a plurality of auxiliary feeding rollers 32 are installed in parallel on bearing seats on both sides, a feeding transition plate 31 is further installed in front of the auxiliary feeding rollers, a thickness measuring device is installed above the feeding direction feeding rollers, the thickness measuring device mainly comprises a thickness measuring reverse idle wheel 33, a thickness measuring sensor 35 and a thickness measuring cylinder 36, thickness measurement can be performed after a PCB enters, and a feeding guide plate 34 is installed at one end of the thickness measuring device, so that the PCB is prevented from warping and being unable to enter an upper and lower feeding belt area.
It should be noted that the upper and lower belts described herein may be belts, steel belts, or other types of belts.
2) Detection mechanism
The detection mechanism comprises an upper acquisition mechanism (upper detection mechanism) and a lower acquisition mechanism (lower detection mechanism), the structural principles of the detection mechanism are the same, and the characteristics of the acquisition mechanisms are explained in detail by taking the upper acquisition mechanism as an example.
As shown in fig. 4, is a schematic view of the upper collection mechanism, wherein: the upper detection mounting base 41 is provided with an upper acquisition Z axis 42, a plurality of acquisition cameras 43 are distributed on the upper acquisition Z axis 43, all the acquisition cameras 43 are positioned on the same Y axis straight line, a corresponding lens 45 is arranged under each acquisition camera 42, and a coaxial light source 46 and a side light source 47 form a light source system under the lens 45 to provide light sources for acquisition of the acquisition cameras. Like the acquisition camera and its lens, the light source system is also fixed to the upper acquisition Z-axis 42, allowing the working height of the acquisition mechanism to be adjusted according to the lines of different board thicknesses. The collecting camera 42 is preferably a line scan camera, and the lens 45 is preferably a line scan lens, together with the light source system, to form a collecting camera assembly.
In particular, each of the capturing camera assemblies is designed with a camera adjusting device 44, which is designed with an adjusting mechanism for adjusting the X direction, the Z direction and the angle θ direction, and each of the capturing cameras can independently adjust the X direction, the Z direction and the angle θ direction, so that all the cameras have the same resolution and definition, and the operating states of all the cameras are consistent.
3) Whole machine structure
As shown in fig. 5, a schematic view of an internal structure of the on-line AOI optical inspection machine provided in this embodiment is shown, wherein the auxiliary plate feeding conveyer 51, the upper conveyer 52 and the lower conveyer 54 form an inspection section conveying structure, the upper conveyer 52 is located above the middle of the auxiliary plate feeding conveyer 51 and the lower conveyer 54 and directly above the lower collecting mechanism 57, the upper collecting mechanism 53 is located above the lower conveyer 52, and vacuum suction devices are disposed in both the upper conveyer 52 and the lower conveyer 54. Further, the transfer mechanism may also include an exit plate conveyor 55 located behind the lower conveyor 54. As described above, all the components of the transport mechanism and all the components of the detection mechanism are mounted on the frame 56.
The working flow of the detection machine in the embodiment is as follows: the PCB enters the equipment from the auxiliary board feeding conveying device 51, the thickness value of the PCB is obtained when the PCB passes through the thickness measuring device in the board feeding auxiliary conveying device 51, the thickness value is fed back to the Z-axis lifting motor in the upper conveying device 52 to adjust the height of the upper conveying belt, the height of the upper collecting camera is adjusted by the Z-axis lifting motor of the upper collecting mechanism 53, after the PCB enters the covering area of the upper conveying device 52, the PCB is completely and flatly adsorbed on the upper conveying belt under the vacuum action of the PCB, the PCB stably passes through the lower detecting area to realize the image collection of the lower collecting device, then the PCB is conveyed from the upper conveying device 52 to the lower conveying device 54, the PCB is completely and flatly adsorbed on the lower conveying belt, the PCB stably passes through the upper detecting area to realize the image collection of the upper collecting device, then the PCB is conveyed to the board discharging conveying device 55 to carry out the blanking of the PCB, and the whole PCB conveying and image collecting functions are completed, and finally, comparing the acquired PCB image with the standard data image, and obtaining the defect position of the PCB after data processing to finish the detection of the PCB.
The scheme of the utility model has the following remarkable characteristics:
1) the conveying mechanism comprises an upper conveying belt device, a lower conveying belt device and a board feeding auxiliary conveying device, an upper conveying belt and a lower conveying belt are used for detection and conveying, and the upper conveying belt and the lower conveying belt are both provided with vacuum adsorption devices, so that the PCB is leveled and stably conveyed, the conveying stability is improved, and the problem of image blurring is solved;
2) the conveying section adopts a conveying belt mode, the structure is simple and reliable, the processing is easy, the sliding friction damage does not exist, the service life is long, and the debugging and the maintenance are simple and convenient;
3) every collection camera subassembly in the detection mechanism all designs camera adjusting device, and the device designs the guiding mechanism of X direction, Z direction and angle theta direction, and every collection camera subassembly can adjust X direction, Z direction and angle theta direction alone. And the specific identical resolution and definition of all the cameras are adjusted, and the requirement of consistency of the resolution and the definition of all the cameras is ensured.
4) The upper conveying belt and the lower conveying belt respectively adopt two power motors, so that the gap adjusting range of the upper conveying belt and the lower conveying belt is enlarged, the PCB detection of all thicknesses of customers is adapted, and the compatibility is enhanced.
According to the technical scheme, the embodiment of the utility model has the following advantages:
1) conveying stability: the conveying mechanism adopts the design of upper and lower conveying belts and vacuum, so that the smoothness and stability of conveying of an image acquisition area are ensured, the conveying stability is improved, and the problem of image blurring caused by PCB warping is solved.
2) The stability of the mechanism: every collection camera all designs on independent camera adjusting device, and the device design has the guiding mechanism of X direction, Y direction and angle theta direction, can adjust all cameras to same operating condition, and resolution, definition are unanimous.
3) Easy debugging and maintenance: the upper and lower conveyor belts are separately controlled and conveyed, and each camera is arranged on an independent camera adjusting device, so that the camera is very easy to debug and maintain.
4) Low cost and easy processing: compared with the pinch roller conveying, the conveying belt conveying is adopted, so that the requirement on the machining of the roller is reduced, and the cost is also reduced.
5) The conveying precision is high, the upper conveying belt and the lower conveying belt are respectively controlled by motors with the same specification parameters, no transfer link exists, and the conveying precision of the conveying belts is improved.
6) The compatibility is strong: the upper conveying belt and the lower conveying belt are separately conveyed, the upper conveying belt can be independently controlled to ascend and descend, and products with all thicknesses can be compatible for detection.
The technical solution of the present invention is explained in detail by the specific embodiments above. In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same. The technical solutions described in the above embodiments can be modified or part of the technical features can be equivalently replaced by those skilled in the art; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An online AOI optical inspection machine for circuit boards is characterized by comprising a conveying mechanism and an inspection mechanism; the conveying mechanism comprises an upper conveying belt device, a lower conveying belt device and a plate feeding auxiliary conveying device, and vacuum adsorption devices are arranged in the upper conveying belt device and the lower conveying belt device; the detection mechanism comprises an upper acquisition mechanism and a lower acquisition mechanism, each acquisition mechanism comprises a plurality of acquisition camera components, each acquisition camera component is arranged on an independent camera adjusting device, and the camera adjusting devices can adjust the X direction, the Z direction and the angle theta direction; the two acquisition mechanisms are divided into an upper acquisition mechanism and a lower acquisition mechanism which are respectively used for detecting the upper surface and the lower surface of the circuit board.
2. The on-line AOI optical inspection machine for circuit boards according to claim 1, wherein vacuum holes are formed in both the upper conveyor belt of the upper conveyor belt device and the lower conveyor belt of the lower conveyor belt device, and the vacuum suction device comprises a vacuum chuck matched with the vacuum holes.
3. The on-line AOI optical inspection machine for circuit boards according to claim 2,
the vacuum chuck is provided with vacuum grooves corresponding to the Y direction of the vacuum holes, the width of the notch of each vacuum groove is larger than the diameter of each vacuum hole, and the length of the notch is larger than the hole distance between two adjacent vacuum holes in the Y direction.
4. The on-line AOI optical inspection machine for circuit boards according to claim 2, wherein the upper conveyor further comprises an upper conveyor Z-axis; the upper conveying belt is arranged on the Z axis of the upper conveying belt, is driven by the Z axis of the upper conveying belt to move up and down and is used for adjusting the gap between the upper conveying belt and the lower conveying belt according to the thickness of the circuit board.
5. The on-line AOI optical inspection machine for circuit boards according to claim 2, wherein the upper conveyor belt and the lower conveyor belt are respectively controlled by motors with the same specification parameters.
6. The machine of claim 1, wherein the auxiliary plate feeding conveyor comprises a plurality of auxiliary conveying rollers, a plate feeding guide plate and a thickness measuring device.
7. The on-line AOI optical inspection machine of circuit board of claim 1, wherein the upper acquisition camera assembly of the upper acquisition mechanism is mounted on an upper acquisition Z axis, and is driven by the upper acquisition Z axis to move up and down for adjusting the height of the upper acquisition camera assembly according to the thickness of the circuit board to achieve the purpose of fixing the focal length.
8. The machine of claim 1, wherein the collection camera assembly comprises a line scan camera and a light source system with a line scan lens.
9. The machine according to claim 1, wherein the upper conveyor is disposed above the middle position between the auxiliary board feeding conveyor and the lower conveyor, and is located right above the lower collecting mechanism; the upper collecting mechanism is positioned above the lower conveying belt device.
10. An on-line AOI optical inspection machine for circuit boards according to claim 1 wherein said conveyor further comprises a board exit conveyor disposed behind said lower conveyor means.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123155247.5U CN216560315U (en) | 2021-12-15 | 2021-12-15 | Online AOI optical inspection machine of circuit board |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123155247.5U CN216560315U (en) | 2021-12-15 | 2021-12-15 | Online AOI optical inspection machine of circuit board |
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| CN216560315U true CN216560315U (en) | 2022-05-17 |
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| CN202123155247.5U Active CN216560315U (en) | 2021-12-15 | 2021-12-15 | Online AOI optical inspection machine of circuit board |
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2021
- 2021-12-15 CN CN202123155247.5U patent/CN216560315U/en active Active
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