Circuit board visual inspection mechanism and inspection method thereof

Abstract

The present invention provides a circuit board visual inspection mechanism and an inspection method thereof, belonging to the technical field of circuit board inspection equipment. The circuit board visual inspection mechanism includes a support base, wherein two second support plates and a first support plate are respectively provided on the left and right sides of the support base; a loading mechanism, wherein the loading mechanism is located between the two first support plates and is used to carry the circuit board; two groups of grasping mechanisms, wherein the two groups of grasping mechanisms are respectively located on the upper sides of the second support plate and the first support plate, and the two groups of grasping mechanisms are respectively used to grasp the circuit board and make it move horizontally or vertically; and two gantries, wherein the bottoms of the two gantries are respectively fixed to the upper ends of the two first support plates; the present invention enables the circuit board to be photographed through light, thereby making it possible to more clearly display whether the printed part of the circuit board has defects, making it more accurate when performing the distinction and less prone to errors.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit board detection equipment, and in particular relates to a circuit board visual detection mechanism and a detection method thereof. Background Art

[0002] Circuit boards are known as ceramic circuit boards, alumina ceramic circuit boards, aluminum nitride ceramic circuit boards, circuit boards, PCB boards, aluminum substrates, high-frequency boards, thick copper boards, impedance boards, PCBs, ultra-thin circuit boards, ultra-thin circuit boards, and printed (copper etching technology) circuit boards. Circuit boards miniaturize and visualize circuits, playing an important role in the mass production of fixed circuits and optimizing the layout of electrical appliances.

[0003] The circuit board will be printed on the required parts, and the effect after printing will be tested. After printing, the unprinted parts will be dissolved with a solvent to realize the processing process of the required circuit board parts. The effect after printing directly affects the subsequent process. The existing detection of printing effect is mainly based on subjective visual judgment, which is not only inefficient, but also makes the detection effect prone to errors, which may easily lead to greater errors in subsequent use. Summary of the Invention

[0004] The purpose of the present invention is to provide a circuit board visual inspection mechanism, which aims to solve the problem in the prior art that the circuit board will be printed according to the required parts, the effect after printing is inspected, and the unprinted part is dissolved with a solvent after printing to realize the processing process of the required circuit board part. The effect after printing directly affects the subsequent process. The existing detection of printing effect is mainly based on subjective visual judgment, which is not only inefficient, but also makes the detection effect prone to errors, thereby easily causing greater errors in subsequent use.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] Circuit board visual inspection mechanism, including:

[0007] A support base, wherein two second support plates and a first support plate are respectively provided on the left and right sides of the support base;

[0008] A loading mechanism, located between the two first support plates and used for carrying a circuit board;

[0009] Two groups of gripping mechanisms, the two groups of gripping mechanisms are respectively located on the upper side of the second support plate and the first support plate, and the two groups of gripping mechanisms are respectively used to grip the circuit board and move it horizontally or vertically;

[0010] Two gantries, the bottoms of the two gantries are respectively fixed to the upper ends of the two first support plates, and the two gantries are connected to the gripping mechanism located on the right side to achieve fixing them above the first support plates;

[0011] Two L-shaped frames, the bottoms of the two L-shaped frames are respectively fixed to the upper ends of the two second support plates, and the two L-shaped frames are connected to the gripping mechanism located on the left side to achieve fixing them above the second support plates;

[0012] Three groups of conveying mechanisms, two of which are located above the support base, and another group of which is located at the top center of the two second support plates. The three groups of conveying mechanisms are respectively connected to the support base and the two second support plates to transport the circuit boards. The three groups of conveying mechanisms are electrically connected in sequence via communication lines;

[0013] A photographing mechanism, located on the upper side of the supporting base, for photographing and uploading the circuit boards transported by the conveying mechanism; and

[0014] The collection mechanism consists of an abnormal collection plate, multiple OK collection plates and multiple problem collection plates. The abnormal collection plate is fixed to the left end of the two second support plates. One end of the two second support plates is provided with a fixing groove matching the OK collection plate and the problem collection plate. The multiple OK collection plates and the problem collection plates are respectively fixed in the multiple fixing grooves, and the multiple OK collection plates and the problem collection plates are staggered up and down.

[0015] As a preferred solution of the present invention, the loading mechanism includes a fixing rod and a loading platform, the fixing rod is fixed between the adjacent ends of the left sides of the two first support plates, and the loading platform is fixed to the right end of the fixing rod.

[0016] As a preferred solution of the present invention, each group of the grasping mechanisms is composed of a slide rail, a screw nut driving assembly, a slider, a telescopic assembly and a suction assembly. The slide rails in the two groups of the grasping mechanisms are distributed horizontally and vertically, respectively, and the two slide rails are fixed between the two L-shaped frames and the bottom wall of the gantry; the slider is slidably connected to the slide rail, the screw nut driving assembly is connected to the slider to realize its linear motion, the telescopic assembly is connected to the slider and the suction assembly to realize the linear motion of the suction assembly up and down, and the suction assembly is used to grasp the circuit board.

[0017] As a preferred solution of the present invention, each group of the telescopic components includes a fixed plate, a first connecting plate and three cylinders, the fixed plate is fixed to the lower end of the slider, the upper ends of the three cylinders are fixed to the lower end of the fixed plate, and the upper end of the first connecting plate is fixed to the output ends of the three cylinders.

[0018] As a preferred solution of the present invention, each group of the suction components includes an air pump, two second connecting plates, four suction cups and four connecting pipes. The air pump is fixed to the upper end of the first connecting plate, and the two second connecting plates are respectively fixed to the two sides of the lower end of the first connecting plate. The four suction cups are respectively fixed to the four second connecting plates by bolts, and the four suction cups are distributed in a "rectangular" shape. One end of the four connecting pipes is fixedly connected to the output end of the air pump, and the other ends of the four connecting pipes are respectively fixed between the four suction cups and are respectively connected to the inside of the four suction cups.

[0019] As a preferred solution of the present invention, each group of the transmission mechanism includes a transmission shaft, two transverse plates and two conveyor belts, the two transverse plates are respectively fixed to the front and rear parts of the upper end of the support base, the two conveyor belts are rotatably connected between the close ends of the two transverse plates, and the transmission shaft is transmission-connected to the circumferential surfaces of the two conveyor belts; the front ends of the conveyor belts located on the left side of the three groups of transmission mechanisms are respectively movable through the front ends of the three transverse plates located on the front side and extend forward, wherein the circumferential surfaces of the extended ends of the three conveyor belts are fixed with I-shaped pulleys, and belts are transmitted and connected between the circumferential surfaces of the I-shaped pulleys, and the rear end of one of the transverse plates is fixed with a second motor, and the output shaft of the second motor is movable through the front end of the transverse plate and fixed to the end of one of the conveyor belts located on the left side.

[0020] As a preferred solution of the present invention, the photographing mechanism includes a photographing box, a fixing seat and a camera. The photographing box is fixed to the upper end of the supporting base. The bottom of the photographing box is a notch, and the lower parts of the left and right ends of the photographing box are both provided with notches to allow the transportation of circuit boards; the cameras and fixing seats are both provided in multiple and one-to-one correspondence, the fixing seat is fixed to the upper inner wall of the photographing box, and the camera is movably connected to the lower end of the fixing seat.

[0021] As a preferred solution of the present invention, a tray is fixed between the front and rear inner walls of the photo box, and the bottom of the tray is in contact with the upper surface of one of the transmission shafts. An inclined surface is provided on the side of the tray close to the fixed rod, and a plurality of evenly distributed mounting grooves are provided at the upper end of the tray. Lamp beads are fixedly installed in the plurality of mounting grooves, and the plurality of lamp beads are electrically connected to an external power supply.

[0022] As a preferred solution of the present invention, a plurality of evenly distributed second reinforcing rods are fixed between the adjacent ends of the two second support plates, and a plurality of evenly distributed first reinforcing rods are fixed between the adjacent ends of the two first support plates.

[0023] As a preferred solution of the present invention, a detection method of a circuit board visual detection mechanism includes the following steps:

[0024] S1: When the circuit board needs to be inspected, the circuit board is first placed on the loading table. The cylinder is first started to drive the suction cup in the suction assembly to move downward and contact the upper surface of the circuit board. Then the vacuum pump is started so that the suction port of the vacuum pump vacuums the suction cup through the connecting pipe, so that the suction cup has adsorption force and can adsorb the circuit board. At this time, the suction cup is driven up again by the cylinder. At this time, the slider is driven to move to the left by the screw nut driving assembly. The slider drives the cylinder to move through the fixed plate, so that the cylinder drives the suction cup to move, and finally the circuit board falls onto the conveyor belt on the left;

[0025] S2; At this time, the second motor is started, and the output shaft of the second motor drives the transmission shaft fixed to it to rotate, and the transmission shaft drives the I-shaped pulley fixed to it to rotate. Since the belt drive is connected to the circumferential surfaces of the three I-shaped pulleys, and the conveyor belt drive is connected to the circumferential surfaces of the two transmission shafts, the multiple transmission shafts respectively drive the multiple conveyor belts to transmit. When the circuit board falls onto the conveyor belt on the left, the circuit board moves to the right;

[0026] S3: When the circuit board passes the tray, it is pushed to the upper side of the tray by the conveyor belt. The light emitted by the lamp beads installed on the tray passes through the circuit board. At this time, the camera takes a photo of the circuit board through the light. After the photo is taken, the camera outputs the data to the control end and compares it with the stored data center. After the comparison is completed, the circuit board can be gently pushed so that it falls onto the conveyor belt for transmission;

[0027] S4: When the circuit board is on the conveyor belt on the left, the gripping mechanism on the left is activated, so that the suction cup absorbs the circuit board and distinguishes it, moving the qualified ones to one side and the unqualified ones to the other side for distinction; finally, it is transferred to the collection mechanism through the conveyor belt, so that the qualified and unqualified circuit boards can be placed separately.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. This solution is equipped with multiple cameras to take pictures of circuit boards, distinguish whether the printed circuit boards are qualified, and place the qualified circuit boards in different areas through a grabbing mechanism, making the circuit board inspection more efficient. When taking pictures of the circuit boards, the light emitted by the lamp beads passes through the circuit boards, so that the circuit boards can be photographed through light, so that the circuit boards can be more clearly displayed whether there are defects in the printed parts, which makes the identification more accurate and less prone to errors.

[0030] 2. In this solution, the suction component is provided so that the suction cup can absorb the circuit board by vacuuming it, making the circuit board more firmly absorbed and not easy to fall and be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 This is the first stereogram of the present invention;

[0033] Figure 2 is the second stereogram of the present invention;

[0034] Figure 3 For the present invention Figure 2 A partial enlarged view of point B in the middle;

[0035] Figure 4 This is the third stereogram of the present invention;

[0036] Figure 5 For the present invention Figure 4 A partial enlarged view of point A in the middle;

[0037] Figure 6 It is a partial stereoscopic diagram of the photographing mechanism in the present invention;

[0038] Figure 7 This is a partial enlarged view of the tray in the present invention;

[0039] Figure 8 This is the fourth stereogram in the present invention.

[0040] In the figure: 1. support base; 2. first support plate; 201. first reinforcing rod; 3. second support plate; 301. second reinforcing rod; 4. photo box; 5. camera; 51. fixed seat; 6. grabbing mechanism; 61. slide rail; 62. first motor; 63. slider; 64. fixed plate; 641. cylinder; 642. first connecting plate; 65. vacuum pump; 651. connecting pipe; 652. suction cup; 653. second connecting plate; 7. conveying mechanism; 701. conveyor belt; 702. transmission shaft; 703. cross plate; 8. abnormal collection plate; 801. OK collection plate; 802. problem collection plate; 9. L-shaped frame; 10. I-shaped pulley; 11. belt; 12. tray; 121. mounting slot; 122. lamp beads; 13. second motor; 14. fixed rod; 141. loading platform; 15. gantry. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0042] See also Figure 1-8 , the present invention provides the following technical solutions:

[0043] Road plate visual inspection mechanism, including:

[0044] A support base 1, with two second support plates 3 and a first support plate 2 provided on the left and right sides of the support base 1 respectively;

[0045] A loading mechanism is located between the two first support plates 2 and is used to carry circuit boards;

[0046] Two sets of gripping mechanisms 6, the two sets of gripping mechanisms 6 are respectively located on the upper side of the second support plate 3 and the first support plate 2, and the two sets of gripping mechanisms 6 are respectively used to grip the circuit board and move it horizontally or vertically;

[0047] Two gantries 15, the bottoms of the two gantries 15 are respectively fixed to the upper ends of the two first support plates 2, and the two gantries 15 are connected to the gripping mechanism 6 located on the right side to fix them above the first support plate 2;

[0048] Two L-shaped frames 9, the bottoms of the two L-shaped frames 9 are respectively fixed to the upper ends of the two second support plates 3, and the two L-shaped frames 9 are connected to the gripping mechanism 6 located on the left side to fix them above the second support plates 3;

[0049] Three sets of conveying mechanisms 7, two of which are located above the support base 1, and another set of conveying mechanisms 7 is located at the top center of the two second support plates 3. The three sets of conveying mechanisms 7 are respectively connected to the support base 1 and the two second support plates 3 to realize the transportation of circuit boards. The three sets of conveying mechanisms 7 are electrically connected in sequence through communication lines;

[0050] A photographing mechanism, which is located on the upper side of the supporting base 1 and is used to take photos of the circuit boards transported by the conveying mechanism 7 and upload them; and

[0051] The collection mechanism consists of an abnormal collection plate 8, multiple OK collection plates 801 and multiple problem collection plates 802. The abnormal collection plate 8 is fixed to the left end of the two second support plates 3. One end of the two second support plates 3 is provided with a fixing groove matching the OK collection plate 801 and the problem collection plate 802. The multiple OK collection plates 801 and the problem collection plates 802 are respectively fixed in the multiple fixing grooves, and the multiple OK collection plates 801 and the problem collection plates 802 are staggered up and down.

[0052] In a specific embodiment of the present invention, the support base 1 in the device is used to support two groups of conveying mechanisms 7 and a photographing mechanism, the two second support plates 3 are used to support the L-shaped frame 9 and one group of conveying mechanisms 7, the two first support plates 2 are used to support the loading mechanism and the two gantries 15, the loading mechanism is used to place the printed circuit board and grab the circuit board through the grabbing mechanism 6, because the grabbing mechanism 6 is composed of a slide rail 61, a screw nut driving assembly, a slider 63, a telescopic assembly and a suction assembly, the slide rail 61 is fixed on the two gantries 15, the gantries 15 is used to support the L-shaped frame 9, the slide rail 61 is fixed horizontally, so that the slider 63 can be moved horizontally and linearly The slider 63 is driven by the screw nut driving assembly. The screw nut driving assembly consists of a first motor 62, a screw and a screw nut. The screw is fixed in the slide rail 61. The screw nut is threadedly connected to the circumferential surface of the screw, and the screw nut is fixed to the slider 63. A bevel gear is fixed to one end of the screw through the output shaft of the first motor 62 and the screw, and the two bevel gears are engaged, so that the output shaft of the first motor 62 can drive the screw to rotate, thereby causing the screw nut to drive the slider 63 to move linearly. At this time, by starting the cylinder 641, the output end of the cylinder 641 drives the first connecting plate 642 to move up and down, and the first connecting plate 642 is connected to the second connecting plate 653 drives the bottom of the suction cup 652 to fit the circuit, and then starts the air pump 65, so that the suction port of the air pump 65 vacuums the suction cup 652 through the connecting pipe 651, so that the suction cup 652 has an adsorption force and can adsorb the circuit board. At this time, the suction cup 652 is driven to rise again by the cylinder 641. At this time, the slider 63 is driven to move to the left by the screw nut driving assembly. The slider 63 drives the cylinder 641 to move through the fixed plate 64, so that the cylinder 641 drives the suction cup 652 to move, and finally the circuit board falls onto the conveyor belt 701 in the conveying mechanism 7 on the left, and then the circuit board is transported to the tray in the photographing box 4 through it. 12, the light emitted by the lamp beads 122 passes through the circuit board, so that the circuit board is photographed through light. At this time, the camera 5 takes a photo, and the camera 5 transmits the photo of the circuit board to the external control end and compares it with the stored data, so that the circuit board continues to be conveyed to the upper side of the second support plate 3. Then, the gripping mechanism 6 on the left is started at this time. Its working principle is the same as that on the right, except that its moving direction is longitudinal and linear, so that the suction cup 652 adsorbs the circuit board, and moves the qualified ones to one side to the OK collection plate 801, and the unqualified ones to the other side to the problem collection plate 802 for distinction, and are placed on the front and back parts of the upper side of the conveyor belt 701;Finally, the printed circuit boards are transported to the collection mechanism via conveyor belt 701. The abnormal collection plate 8 is used to collect abnormal boards, the OK collection plate 801 is used to collect OK boards, and the problem collection plate 802 is used to collect problem boards. This allows qualified and unqualified boards to be placed separately. The present invention allows for transparent light photography of the printed circuit boards, which more clearly shows whether there are defects in the printed part of the board, making the identification more accurate and less prone to errors.

[0053] Preferably, the device is controlled by a single chip microcomputer provided at an external control end, the single chip microcomputer is electrically connected to the camera 5, the cylinder 641, the air pump 65, the first motor 62, the second motor 13 and the lamp bead 122 to realize automatic control, and an electronic control circuit is provided in the single chip microcomputer;

[0054] In this embodiment: the present invention realizes corresponding automatic control of the camera 5, the cylinder 641, the air pump 65, the first motor 62, the second motor 13 and the lamp bead 122 through a single-chip microcomputer and a corresponding electronic control circuit. Based on the idea of ​​the present invention, those skilled in the art can easily set up the corresponding electronic control circuit. In other words, how to realize the automatic control above belongs to the common knowledge of those skilled in the art, so it will not be repeated here. It needs to be explained that the specific type of single-chip microcomputer, camera 5, cylinder 641, air pump 65, first motor 62, second motor 13 and lamp bead 122 to be used is selected by relevant technical personnel familiar with this field, and the above single-chip microcomputer, camera 5, cylinder 641, air pump 65, first motor 62, second motor 13 and lamp bead 122 are all existing technologies, and this solution will not be repeated here.

[0055] For details, please refer to Figure 5 The loading mechanism includes a fixed rod 14 and a loading platform 141. The fixed rod 14 is fixed between the adjacent ends of the left sides of the two first support plates 2, and the loading platform 141 is fixed to the right end of the fixed rod 14. By placing the circuit board on the loading platform 141, the suction cup 652 is convenient for adsorption. The fixed rod 14 is used to support the loading platform 141, so that it is fixed and stable.

[0056] For details, please refer to Figure 1 and Figure 3Each group of grasping mechanisms 6 is composed of a slide rail 61, a screw nut driving assembly, a slider 63, a telescopic assembly and a suction assembly. The slide rails 61 in the two groups of grasping mechanisms 6 are distributed horizontally and vertically respectively, and the two slide rails 61 are fixed between the two L-shaped frames 9 and the bottom wall of the gantry 15; the slider 63 is slidably connected to the slide rail 61, and the screw nut driving assembly is connected to the slider 63 to realize its linear motion. The telescopic assembly is connected to the slider 63 and the suction assembly to realize the linear motion of the suction assembly up and down, and the suction assembly is used to grasp the circuit board; the two groups of grasping mechanisms 6 are respectively used for clamping the circuit board for loading and unloading, which increases the efficiency of circuit board detection and reduces the consumption of manual labor.

[0057] For details, please refer to Figure 3 Each telescopic assembly includes a fixed plate 64, a first connecting plate 642 and three cylinders 641. The fixed plate 64 is fixed to the lower end of the slider 63. The upper ends of the three cylinders 641 are fixed to the lower end of the fixed plate 64. The upper end of the first connecting plate 642 is fixed to the output ends of the three cylinders 641.

[0058] In this embodiment: the output shaft of the loading platform 141 drives the first connecting plate 642 to move up and down, so that the first connecting plate 642 can drive the suction cup 652 in the driving assembly to better fit and adsorb the circuit board, and can better move the position of the circuit board.

[0059] For details, please refer to Figure 3 Each set of suction components includes an air pump 65, two second connecting plates 653, four suction cups 652 and four connecting pipes 651. The air pump 65 is fixed to the upper end of the first connecting plate 642, and the two second connecting plates 653 are respectively fixed to the two sides of the lower end of the first connecting plate 642. The four suction cups 652 are respectively fixed to the four second connecting plates 653 by bolts, and the four suction cups 652 are distributed in a "rectangular" shape. One end of the four connecting pipes 651 is fixedly connected to the output end of the air pump 65, and the other ends of the four connecting pipes 651 are respectively fixed between the four suction cups 652 and are respectively connected to the inside of the four suction cups 652.

[0060] In this embodiment, by starting the vacuum pump 65, the vacuum pump 65 vacuums the suction cup 652 through the connecting pipe 651, and the suction cup 652 fits the circuit board, which can better absorb the circuit board and prevent it from falling off.

[0061] For details, please refer to Figure 1 、 Figure 6 and Figure 8Each set of transmission mechanisms 7 includes a transmission shaft 702, two transverse plates 703 and two conveyor belts 701. The two transverse plates 703 are respectively fixed to the front and rear parts of the upper end of the supporting base 1. The two conveyor belts 701 are rotatably connected between the close ends of the two transverse plates 703, and the transmission shaft 702 is transmission-connected to the circumferential surfaces of the two conveyor belts 701; the front ends of the conveyor belts 701 on the left side of the three transmission mechanisms 7 are movable through the front ends of the three transverse plates 703 on the front side and extend forward, wherein the circumferential surfaces of the extended ends of the three conveyor belts 701 are fixed with I-shaped wheels 10, and the circumferential surfaces of the I-shaped wheels 10 are transmitted and connected with belts 11, and the rear end of one of the transverse plates 703 is fixed with a second motor 13, and the output shaft of the second motor 13 is movable through the front end of the transverse plate 703 and is fixed to the end of one of the conveyor belts 701 on the left side.

[0062] In this embodiment, by starting the second motor 13, the output shaft of the second motor 13 drives the transmission shaft 702 fixed thereto to rotate, and the transmission shaft 702 drives the I-shaped pulley 10 fixed thereto to rotate. Since the belt 11 is connected to the circumferential surfaces of the three I-shaped pulleys 10, the conveyor belt 701 is connected to the circumferential surfaces of the two transmission shafts 702, so that the multiple transmission shafts 702 respectively drive the multiple conveyor belts 701 to transmit. When the circuit board falls onto the conveyor belt 701 on the left, the circuit board moves to the right, which makes the transportation of the circuit board stable and the photography clearer.

[0063] For details, please refer to Figure 6 The photographing mechanism includes a photographing box 4, a fixing seat 51 and a camera 5. The photographing box 4 is fixed to the upper end of the supporting base 1. The bottom of the photographing box 4 is a notch, and the lower parts of the left and right ends of the photographing box 4 are provided with notches to allow the transportation of circuit boards; there are multiple cameras 5 and fixing seats 51 and they correspond one to one. The fixing seat 51 is fixed to the upper inner wall of the photographing box 4, and the camera 5 is movably connected to the lower end of the fixing seat 51.

[0064] In this embodiment: by providing multiple cameras 5, the photography is all-round, clearer, and less prone to errors. At the same time, the fixing base 51 is used to fix the camera 5. The fixing base 51 and the camera 5 are fixed by screws, so that the camera 5 can adjust the angle according to actual needs, which is convenient for adjustment.

[0065] For details, please refer to Figure 7 A tray 12 is fixed between the front and rear inner walls of the photo box 4, and the bottom of the tray 12 is in contact with the upper surface of one of the transmission shafts 702. The tray 12 is provided with an inclined surface on the side close to the fixing rod 14. A plurality of evenly distributed mounting grooves 121 are provided at the upper end of the tray 12. Lamp beads 122 are fixedly installed in the plurality of mounting grooves 121, and the plurality of lamp beads 122 are electrically connected to an external power supply.

[0066] In this embodiment: by providing a tray 12, and one end of the tray 12 is an inclined surface, the circuit board can better enter the tray 12 when being transmitted by the conveyor belt 701, and the installation groove 121 is used to install the lamp bead 122. The light emitted by the lamp bead 122 passes through the circuit board, so that the circuit board can be photographed through light, so that the circuit board can be more clearly displayed whether there are defects in the printed part, and the identification is more accurate and less prone to errors.

[0067] For details, please refer to Figure 1 A plurality of evenly distributed second reinforcing rods 301 are fixed between the adjacent ends of the two second support plates 3 , and a plurality of evenly distributed first reinforcing rods 201 are fixed between the adjacent ends of the two first support plates 2 .

[0068] In this embodiment, the connection between the two second support plates 3 and the first support plate 2 is further strengthened by multiple second reinforcement rods 301 and the first reinforcement rod 201, so that the second support plates 3 and the first support plates 2 are more secure and less likely to shake when placed on the ground, and are more stable.

[0069] The working principle and use process of the present invention: The detection method of the circuit board visual detection mechanism includes the following steps:

[0070] S1: When the circuit board needs to be inspected, the circuit board is first placed on the loading table 141. The cylinder 641 is first started to drive the suction cup 652 in the suction assembly to move downward and contact the upper surface of the circuit board. Then, the air pump 65 is started so that the suction port of the air pump 65 vacuums the suction cup 652 through the connecting pipe 651, so that the suction cup 652 has an adsorption force and can adsorb the circuit board. At this time, the suction cup 652 is driven to rise again by the cylinder 641. At this time, the slider 63 is driven to move to the left by the screw nut driving assembly. The slider 63 drives the cylinder 641 to move through the fixed plate 64, so that the cylinder 641 drives the suction cup 652 to move, and finally the circuit board falls onto the conveyor belt 701 on the left.

[0071] S2; At this time, the second motor 13 is started, and the output shaft of the second motor 13 drives the transmission shaft 702 fixed thereto to rotate, and the transmission shaft 702 drives the I-shaped pulley 10 fixed thereto to rotate. Since the belt 11 is connected to the circumferential surfaces of the three I-shaped pulleys 10, the conveyor belt 701 is connected to the circumferential surfaces of the two transmission shafts 702, so that the multiple transmission shafts 702 respectively drive the multiple conveyor belts 701 to transmit. When the circuit board falls onto the conveyor belt 701 on the left side, the circuit board moves to the right;

[0072] S3: When the circuit board passes through the tray 12, it is pushed to the upper side of the tray 12 by the conveyor belt 701. The light emitted by the lamp beads 122 installed on the tray 12 passes through the circuit board. At this time, the camera 5 takes a photo of the circuit board through the light. After the photo is taken, the camera 5 outputs the data to the control end and compares it with the stored data center. After the comparison is completed, the circuit board can be gently pushed so that it falls onto the conveyor belt 701 for transmission;

[0073] S4: When the circuit board is on the conveyor belt 701 on the left, the gripping mechanism 6 on the left is activated, and the operation steps are the same as those in S1, so that the suction cup 652 adsorbs the circuit board and distinguishes it, and moves the qualified ones to one side to the OK collection plate, and the unqualified ones to the problem collection plate on the other side for distinction; finally, the abnormal circuit board is transferred to the abnormal collection plate through the conveyor belt 701, so that the qualified and unqualified circuit boards can be placed separately.

[0074] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. Circuit board visual inspection mechanism, characterized in that, include: A support base (1), wherein two second support plates (3) and a first support plate (2) are respectively provided on the left and right sides of the support base (1); A loading mechanism, the loading mechanism being located between the two first support plates (2) and being used for carrying the circuit board; Two groups of gripping mechanisms (6), the two groups of gripping mechanisms (6) are respectively located on the upper side of the second support plate (3) and the first support plate (2), and the two groups of gripping mechanisms (6) are respectively used to grip the circuit board and make it move horizontally or vertically; Two gantries (15), the bottoms of the two gantries (15) are respectively fixed to the upper ends of the two first support plates (2), and the two gantries (15) are connected to the grabbing mechanism (6) located on the right side to achieve fixing them above the first support plate (2); Two L-shaped frames (9), the bottoms of the two L-shaped frames (9) are respectively fixed to the upper ends of the two second support plates (3), and the two L-shaped frames (9) are connected to the grasping mechanism (6) located on the left side to achieve fixing them above the second support plate (3); Three groups of conveying mechanisms (7), two of which are located above the support base (1), and another group of conveying mechanisms (7) is located at the top center of the two second support plates (3). The three groups of conveying mechanisms (7) are respectively connected to the support base (1) and the two second support plates (3) to realize the transportation of circuit boards. The three groups of conveying mechanisms (7) are electrically connected in sequence through communication lines. Each group of conveying mechanisms (7) includes two transmission shafts (702), two transverse plates (703) and a conveyor belt (701). The two transverse plates (703) are respectively fixed to the front and rear parts of the upper end of the support base (1). The two transmission shafts (702) are rotatably connected to the two transverse plates (703). The conveyor belt (701) is connected to the circumferential surfaces of the two transmission shafts (702) between the adjacent ends; the front ends of the transmission shafts (702) on the left side of the three groups of transmission mechanisms (7) are movable and pass through the front ends of the three transverse plates (703) on the front side and extend forward, wherein the circumferential surfaces of the extended ends of the three transmission shafts (702) are fixed with I-shaped wheels (10), and the circumferential surfaces of the I-shaped wheels (10) are connected with belts (11) in a transmission manner, and the rear end of one of the transverse plates (703) is fixed with a second motor (13), and the output shaft of the second motor (13) is movable and passes through the front end of the transverse plate (703) and is fixed to the end of one of the transmission shafts (702) on the left side; A photographing mechanism, the photographing mechanism being located on the upper side of the supporting base (1), and being used to photograph and upload the circuit board transported by the conveying mechanism (7); as well as A collection mechanism, the collection mechanism is composed of an abnormal collection plate (8), a plurality of OK collection plates (801) and a plurality of problem collection plates (802), the abnormal collection plate (8) is fixed to the left ends of the two second support plates (3), one end of each of the two second support plates (3) is provided with a fixing groove matching the OK collection plate (801) and the problem collection plate (802), the plurality of OK collection plates (801) and the problem collection plates (802) are respectively fixed in the plurality of fixing grooves, and the plurality of OK collection plates (801) and the problem collection plates (802) are staggered up and down; The loading mechanism comprises a fixing rod (14) and a loading platform (141), wherein the fixing rod (14) is fixed between the adjacent ends of the left sides of the two first support plates (2), and the loading platform (141) is fixed to the right end of the fixing rod (14). The photographing mechanism comprises a photographing box (4), a fixing seat (51) and a camera (5), wherein the photographing box (4) is fixed to the upper end of the support base (1), the bottom of the photographing box (4) is a notch, and the lower parts of the left and right ends of the photographing box (4) are both provided with notches for allowing the transportation of circuit boards; the cameras (5) and the fixing seats (51) are both provided in plurality and correspond to each other. The fixing seat (51) is fixed to the upper inner wall of the photo box (4), and the camera (5) is movably connected to the lower end of the fixing seat (51). A tray (12) is fixed between the front and rear inner walls of the photo box (4), and the bottom of the tray (12) is in contact with the upper surface of one of the conveyor belts (701). The tray (12) is provided with an inclined surface on the side close to the fixing rod (14). The upper end of the tray (12) is provided with a plurality of evenly distributed mounting grooves (121), and a plurality of lamp beads (122) are fixedly installed in the plurality of mounting grooves (121), and the plurality of lamp beads (122) are electrically connected to an external power supply.

2. The circuit board visual inspection mechanism according to claim 1, characterized in that: Each group of the grabbing mechanisms (6) is composed of a slide rail (61), a screw nut driving assembly, a slider (63), a telescopic assembly and a suction assembly. The slide rails (61) in the two groups of the grabbing mechanisms (6) are respectively distributed in the transverse direction and the longitudinal direction, and the two slide rails (61) are respectively fixed between the two L-shaped frames (9) and the bottom wall of the gantry (15); the slider (63) is slidably connected to the slide rail (61), the screw nut driving assembly is connected to the slider (63) to achieve linear motion, the telescopic assembly is connected to the slider (63) and the suction assembly to achieve linear motion of the suction assembly up and down, and the suction assembly is used to grab the circuit board.

3. The circuit board visual inspection mechanism according to claim 2, characterized in that: Each group of the telescopic components comprises a fixed plate (64), a first connecting plate (642) and three cylinders (641); the fixed plate (64) is fixed to the lower end of the slider (63); the upper ends of the three cylinders (641) are fixed to the lower end of the fixed plate (64); and the upper end of the first connecting plate (642) is fixed to the output ends of the three cylinders (641).

4. The circuit board visual inspection mechanism according to claim 3, characterized in that: Each group of the suction components comprises an air pump (65), two second connecting plates (653), four suction cups (652) and four connecting pipes (651); the air pump (65) is fixed to the upper end of the first connecting plate (642); the two second connecting plates (653) are respectively fixed to both sides of the lower end of the first connecting plate (642); the four suction cups (652) are respectively fixed to the four second connecting plates (653) by bolts, and the four suction cups (652) are distributed in a "rectangular" shape; one end of the four connecting pipes (651) is fixedly connected to the output end of the air pump (65); the other ends of the four connecting pipes (651) are respectively fixed between the four suction cups (652) and are respectively connected to the inside of the four suction cups (652).

5. The circuit board visual inspection mechanism according to claim 4, characterized in that: A plurality of evenly distributed second reinforcing rods (301) are fixed between the adjacent ends of the two second support plates (3), and a plurality of evenly distributed first reinforcing rods (201) are fixed between the adjacent ends of the two first support plates (2).

6. A circuit board visual inspection method, characterized in that: The circuit board visual inspection mechanism according to any one of claims 4 to 5 is used, comprising the following steps: S1: When the circuit board needs to be inspected, the circuit board is first placed on the loading platform (141), and the cylinder (641) is first started to drive the suction cup (652) in the suction assembly to move downward and contact the upper surface of the circuit board. Then, the vacuum pump (65) is started so that the suction port of the vacuum pump (65) vacuums the suction cup (652) through the connecting pipe (651), so that the suction cup (652) has an adsorption force and can adsorb the circuit board. At this time, the suction cup (652) is driven to rise again by the cylinder (641). At this time, the slider (63) is driven to move to the left by the screw nut driving assembly. The slider (63) drives the cylinder (641) to move through the fixed plate (64), so that the cylinder (641) drives the suction cup (652) to move, and finally the circuit board falls onto the conveyor belt (701) on the left. S2: At this time, the second motor (13) is started, and the output shaft of the second motor (13) drives the transmission shaft (702) fixed thereto to rotate, and the transmission shaft (702) drives the I-shaped wheel (10) fixed thereto to rotate. Since the belt (11) is connected to the circumferential surfaces of the three I-shaped wheels (10), the conveyor belt (701) is connected to the circumferential surfaces of the two transmission shafts (702), so that the multiple transmission shafts (702) respectively drive the multiple conveyor belts (701) to transmit to the left. When the circuit board falls onto the conveyor belt (701) located on the left side, the circuit board moves to the left. S3: When the circuit board passes through the tray (12), it is pushed to the upper side of the tray (12) by the conveyor belt (701), and the light emitted by the lamp beads (122) installed on the tray (12) passes through the circuit board. At this time, the camera (5) takes a photo of the circuit board through light transmission. After the photo is taken, the camera (5) outputs the data to the control end and compares it with the stored data center. After the comparison is completed, the circuit board is gently pushed so that it falls onto the conveyor belt (701) for transmission; S4: When the circuit board is on the conveyor belt (701) on the left, the gripping mechanism (6) on the left is activated, so that the suction cup (652) absorbs the circuit board and distinguishes the circuit board, moving the qualified ones to one side and the unqualified ones to the other side for distinction; finally, the circuit board is transferred to the collection mechanism via the conveyor belt (701), so that the qualified and unqualified circuit boards can be placed separately.

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