High-precision AOI laser detection module for circuit board

Abstract

The utility model belongs to the technical field of circuit board detection, and relates to a high-precision AOI laser detection module for a circuit board, which comprises a detection table and a top plate, an AOI laser detector is fixedly mounted at the top of the top plate, a first driving motor is fixedly mounted at the outer side end of the detection table, and the output end of the first driving motor is fixedly connected with an overturning seat; two sliding rods are fixedly installed between the inner walls of the two sides in the overturning base, a transmission shaft is rotationally installed between the inner walls of the two sides in the overturning base, a second driving motor is fixedly installed at the outer side end of the overturning base, the output end of the second driving motor is fixedly connected with the transmission shaft, a transmission wheel is fixedly installed on the transmission shaft, and the two driving bases are symmetrically installed on the two sliding rods in a sliding mode respectively. A pair of driving wheels is rotationally mounted on each of the two sides of the driving seat; two electric push rods are fixedly mounted between the back of the driving seat and the inner wall of the overturning seat; the AOI laser detection module performs high-precision detection on the outer surface of the circuit board, not only has an overturning function, but also can classify good and inferior-quality circuit boards.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit board detection, and particularly relates to a high-precision AOI laser detection module for circuit boards. Background Art

[0002] During the production process of circuit boards, detection equipment is required to detect their appearance, mainly detecting solder joints and vias of circuit boards, etc. Commonly used detection equipment mainly includes AOI laser detection equipment. AOI is a product for detecting appearance defects, such as whether there are cracks, displacement deviations, etc. The basic principle is to output the reflected light intensity of the object to be detected in a quantitative gray-scale value by using imaging technology, and analyze and determine defects and classify them by comparing with the gray-scale value of the standard image.

[0003] However, traditional AOI laser detection equipment can only detect one side of the circuit board. After detecting one side, the circuit board needs to be manually flipped and then re-entered into the detection equipment for detection, with low efficiency, and it is impossible to classify defective products and good products after detection. Content of the Utility Model

[0004] In order to solve the technical problems that traditional AOI laser detection equipment can only detect one side of the circuit board, after detecting one side, the circuit board needs to be manually flipped and then re-entered into the detection equipment for detection, with low efficiency, and it is impossible to classify defective products and good products after detection, the utility model provides the following technical solutions:

[0005] The utility model relates to a high-precision AOI laser detection module for circuit boards, which includes a detection table and a top plate. A belt conveyor is installed on one side of the detection table, and the top plate is fixedly installed on the other side of the top of the detection table. An AOI laser detector is fixedly installed on the top of the top plate, and a flipping assembly is arranged on the detection table;

[0006] The flipping assembly includes a flipping seat, a driving seat, a first driving motor and a transmission belt. The flipping seat is rotatably installed on the side of the detection table away from the belt conveyor. The first driving motor is fixedly installed on the outer end of the detection table, and the output end of the first driving motor is fixedly connected with the flipping seat. Two sliding rods are fixedly installed between the inner side walls of the flipping seat, and a transmission shaft is rotatably installed. A second driving motor is fixedly installed on the outer end of the flipping seat, and the output end of the second driving motor is fixedly connected with the transmission shaft. A transmission wheel is fixedly installed on the transmission shaft. There are two driving seats, which are symmetrically and slidably installed on the two sliding rods respectively. A pair of driving wheels are rotatably installed on both sides of each driving seat, and two electric push rods are fixedly installed between the back of the driving seat and the inner wall of the flipping seat.

[0007] As a preferred technical solution of the present utility model, a plurality of supplementary light lamps are fixedly installed on both side end walls inside the top plate, and the irradiation direction of the supplementary light lamps is inclined towards the detection table.

[0008] As a preferred technical solution of the present utility model, a stop block is fixedly installed on one side of the driving seat close to the belt conveyor.

[0009] As a preferred technical solution of the present utility model, a pair of gears that mesh with each other are fixedly installed at the rear ends of the driving wheels.

[0010] As a preferred technical solution of the present utility model, two adjustment slots are symmetrically opened in the upper and lower parts of the driving seat. Guide wheels are inserted into the adjustment slots, and positioning screw caps are installed at the rear ends of the guide wheels in a threaded manner. A tensioning wheel is arranged at the top of the driving seat in the same way.

[0011] As a preferred technical solution of the present utility model, the transmission belt is sleeved on the transmission wheel, driving wheel, guide wheel and tensioning wheel.

[0012] As a preferred technical solution of the present utility model, a slope is arranged inside the detection table directly below the flipping assembly.

[0013] The beneficial effects achieved by the present utility model are as follows:

[0014] Place the circuit board to be detected between the two transmission belts. The second driving motor drives the two groups of driving wheels to rotate, so that the circuit board clamped between the two transmission belts moves. Finally, it is blocked by the stop block and is exactly located directly below the AOI laser detector. The AOI laser detector performs an appearance inspection on one side of the circuit board. The first driving motor drives the flipping seat to rotate 180° to detect the other side, achieving the purpose of automatic flipping detection and improving the detection efficiency.

[0015] After the detection is completed, if the circuit board is qualified, the second driving motor rotates in the reverse direction to convey the circuit board to the belt conveyor. If the detection is unqualified, the first driving motor rotates 90° again, and the first driving motor vertically discharges the circuit board onto the slope inside the detection table, achieving the purpose of classifying defective circuit boards and good circuit boards.

[0016] For circuit boards of different widths, just remove the transmission belt and control the telescopic movement of the electric push rod to drive one of the driving seats to slide on the sliding rod, achieving the purpose of adjusting the distance between the two driving seats. Then install the transmission wheel and sleeve the transmission belt, improving the versatility. Description of the Drawings

[0017] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0018] Figure 1 It is a schematic structural diagram of a high-precision AOI laser detection module for the circuit board of the present utility model;

[0019] Figure 2 It is a front view sectional view of a high-precision AOI laser detection module for the circuit board of the present utility model;

[0020] Figure 3 It is a schematic structural diagram of the top plate in a high-precision AOI laser detection module for the circuit board of the present utility model;

[0021] Figure 4 It is a schematic structural diagram of the flipping assembly in a high-precision AOI laser detection module for the circuit board of the present utility model;

[0022] Figure 5 It is a schematic structural diagram of the driving seat in a high-precision AOI laser detection module for the circuit board of the present utility model.

[0023] In the figure: 1. Detection table; 101. Belt conveyor; 2. Top plate; 201. AOI laser detector; 202. Fill light; 3. Flipping assembly; 301. Flipping seat; 302. Driving seat; 303. First driving motor; 304. Transmission belt; 305. Slide bar; 306. Transmission shaft; 307. Second driving motor; 308. Transmission wheel; 309. Driving wheel; 310. Stopper; 311. Gear; 312. Adjusting groove; 313. Guide wheel; 314. Tensioning wheel; 315. Positioning screw cap; 316. Electric push rod. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment: As Figures 1-5 shown, a high-precision AOI laser detection module for a circuit board includes a detection table 1 and a top plate 2. A belt conveyor 101 is installed on one side of the detection table 1, and the top plate 2 is fixedly installed on the other side of the top of the detection table 1. An AOI laser detector 201 is fixedly installed on the top of the top plate 2, and a flipping assembly 3 is provided on the detection table 1;

[0026] The flipping assembly 3 includes a flipping base 301, a driving base 302, a first driving motor 303 and a transmission belt 304. The flipping base 301 is rotatably installed on the side of the inspection table 1 away from the belt conveyor 101. The first driving motor 303 is fixedly installed on the outer end of the inspection table 1 and the output end of the first driving motor 303 is fixedly connected to the flipping base 301. Two slide bars 305 are fixedly installed between the inner side walls of the flipping base 301 and a transmission shaft 306 is rotatably installed. A second driving motor 307 is fixedly installed on the outer end of the flipping base 301 and the output end of the second driving motor 307 is fixedly connected to the transmission shaft 306. A transmission wheel 308 is fixedly installed on the transmission shaft 306. There are two driving bases 302 which are symmetrically and slidably installed on the two slide bars 305 respectively. A pair of driving wheels 309 are rotatably installed on both sides of the driving base 302. Two electric push rods 316 are fixedly installed between the back of the driving base 302 and the inner wall of the flipping base 301. During use, the second driving motor 307 drives the transmission shaft 306 to rotate. The rotation of the transmission shaft 306 drives the transmission wheel 308 to rotate. The transmission wheel 308 drives the driving wheels 309 to rotate through the transmission belt 304. The rotation of the driving wheels 309 moves the circuit board clamped between the two transmission belts 304 and finally is blocked by the stop block 310. The first driving motor 303 drives the flipping base 301 to rotate 180° to achieve the purpose of flipping the circuit board. For circuit boards of different widths, only need to remove the transmission belt 304 and control the telescopic movement of the electric push rod 316 to drive one of the driving bases 302 to slide on the slide bar 305 to achieve the purpose of adjusting the distance between the two driving bases 302, and then install the transmission belt 304 on the transmission wheel 308.

[0027] A plurality of supplementary light lamps 202 are fixedly installed on both inner end walls of the top plate 2 and the irradiation direction of the supplementary light lamps 202 is inclined towards the inspection table 1. During use, the detection accuracy of the AOI laser detector 201 is improved by the supplementary light of the supplementary light lamps 202.

[0028] A stop block 310 is fixedly installed on the side of the driving base 302 close to the belt conveyor 101. During use, the stop block 310 can block the circuit board to prevent the circuit board from being directly conveyed onto the belt conveyor 101 due to inertia.

[0029] A pair of meshing gears 311 are fixedly installed at the rear ends of one of the pairs of driving wheels 309. During use, the two sets of driving wheels 309 rotate at the same speed and in opposite directions through the meshing action of the gears 311.

[0030] The driving seat 302 is symmetrically provided with two adjusting grooves 312 up and down. A guide wheel 313 is inserted into the adjusting groove 312, and a positioning screw cap 315 is threadedly installed at the rear end of the guide wheel 313. The top of the driving seat 302 is provided with a tensioning wheel 314 in the same way. The transmission belt 304 is sleeved on the transmission wheel 308, the driving wheel 309, the guide wheel 313 and the tensioning wheel 314. When in use, the positions of the guide wheel 313 and the tensioning wheel 314 are adjusted by using the adjusting groove 312, and then the positioning screw cap 315 is tightened for positioning, so as to achieve the purpose of adjusting the tension of the transmission belt 304.

[0031] A slope is provided inside the detection table 1 directly below the flipping assembly 3. When in use, the defective circuit boards fall onto the slope and slide down along the slope for recovery.

[0032] Specifically, when the present utility model is in use, the circuit board to be detected is placed between the two transmission belts 304 manually or mechanically. The second driving motor 307 drives the transmission shaft 306 to rotate. The rotation of the transmission shaft 306 drives the transmission wheel 308 to rotate. The transmission wheel 308 drives one group of driving wheels 309 to rotate through one of the transmission belts 304. One group of driving wheels 309 rotates to drive the other group of driving wheels 309 to rotate through the gear 311. The rotation of the two groups of driving wheels 309 moves the circuit board clamped between the two transmission belts 304. Finally, it is blocked by the stop block 310 and is exactly located directly below the AOI laser detector 201. The AOI laser detector 201 performs an appearance inspection on one side of the circuit board. The first driving motor 303 drives the flipping seat 301 to rotate 180° to inspect the other side. After the inspection is completed, if the circuit board is qualified, the second driving motor 307 rotates in the reverse direction to convey the circuit board to the belt conveyor 101. If the inspection is unqualified, the first driving motor 303 rotates another 90°, and the first driving motor 303 vertically discharges the circuit board onto the slope inside the detection table 1.

[0033] In the description of the present utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front part", "center", "both ends", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0034] In addition, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth" may explicitly or implicitly include at least one of such features.

[0035] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A high-precision AOI laser inspection module for circuit boards, comprising an inspection platform (1) and a top plate (2), characterized in that: A belt conveyor (101) is installed on one side of the inspection platform (1), and a top plate (2) is fixedly installed on the other side of the top of the inspection platform (1), an AOI laser inspection machine (201) is fixedly installed on the top of the top plate (2), and a flip assembly (3) is provided on the inspection platform (1); The turning assembly (3) comprises a turning seat (301), a driving seat (302), a first driving motor (303) and a transmission belt (304); the turning seat (301) is rotatably mounted on a side of the detection platform (1) away from the belt conveyor (101); the first driving motor (303) is fixedly mounted on the outer end of the detection platform (1) and the output end of the first driving motor (303) is fixedly connected to the turning seat (301); two sliding rods (305) are fixedly mounted between the inner walls on both sides of the turning seat (301) and a transmission shaft (306) is rotatably mounted thereon. A second driving motor (307) is fixedly mounted on the outer end of the flip seat (301), and the output end of the second driving motor (307) is fixedly connected to the transmission shaft (306), a transmission wheel (308) is fixedly mounted on the transmission shaft (306), the driving seat (302) is provided with two and symmetrically slidably mounted on two sliding rods (305), a pair of driving wheels (309) are rotatably mounted on both sides of the driving seat (302), and two electric push rods (316) are fixedly mounted between the back of the driving seat (302) and the inner wall of the flip seat (301).

2. The high-precision AOI laser inspection module for circuit boards according to claim 1, characterized in that: A plurality of fill-in lights (202) are fixedly mounted on both side end walls of the top plate (2), and the irradiation direction of the fill-in lights (202) is inclined toward the detection platform (1).

3. The high-precision AOI laser inspection module for circuit boards according to claim 1, characterized in that: A stopper (310) is fixedly mounted on one side of the driving seat (302) close to the belt conveyor (101).

4. The high-precision AOI laser inspection module for circuit boards according to claim 1, characterized in that: One pair of the driving wheels (309) has gears (311) fixedly mounted at the rear end thereof and meshing with each other.

5. The high-precision AOI laser inspection module for circuit boards according to claim 1, characterized in that: The drive seat (302) is symmetrically provided with two adjustment grooves (312) in the upper and lower parts, a guide wheel (313) is inserted into the adjustment groove (312), and a positioning rotary cover (315) is threadedly installed at the rear end of the guide wheel (313), and a tensioning wheel (314) is provided on the top of the drive seat (302) in the same manner.

6. The high-precision AOI laser inspection module for circuit boards according to claim 5, characterized in that: The transmission belt (304) is sleeved on the transmission wheel (308), the driving wheel (309), the guide wheel (313) and the tensioning wheel (314).

7. The high-precision AOI laser inspection module for circuit boards according to claim 1, characterized in that: A slope is provided in the detection platform (1) directly below the turning assembly (3).

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