Surface defect detection device for pcb (printed circuit board)

Abstract

The utility model relates to the technical field of circuit board detection, and discloses a pcb (printed circuit board) surface defect detection device which comprises a rack, at least two mounting brackets are mounted on the side part of the rack, and a visual detection camera for detecting a pcb is mounted above the mounting brackets; the two ends of the machine frame are respectively provided with a conveying structure used for conveying the pcb, and an overturning structure used for overturning the pcb is installed between the two conveying structures, the overturning mechanism is installed between the two conveying structures, and after one side of the pcb is detected by the visual detection camera, the pcb can be overturned by the overturning mechanism. And the pcb can be overturned through the overturning structure, so that the other side of the pcb is detected, the traditional manual overturning work is replaced, the labor amount of workers is reduced, and convenience is provided for the workers.

Description

Technical Field

[0001] This utility model relates to the field of circuit board testing technology, specifically a PCB board surface defect detection device. Background Technology

[0002] Circuit board defect detection equipment is used to perform safety inspections on PCB circuit boards. The PCB board is the heart of electronic devices, the bridge connecting electronic components, and the key to determining the quality of electronic products. Therefore, PCB board inspection is a particularly important step to identify and repair defects, thereby improving product manufacturing quality.

[0003] During PCB testing, it is usually necessary to inspect both the front and back of the PCB board. However, current testing equipment requires manual flipping of the PCB board after inspecting one side, so that the other side can be inspected. This testing method requires frequent manual flipping of the PCB board, resulting in a large workload and inconvenience to the staff.

[0004] Therefore, we propose a PCB board surface defect detection device to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to solve the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a PCB board surface defect detection device, comprising a frame, at least two mounting brackets are installed on the side of the frame, and a visual inspection camera for detecting PCB boards is installed above the mounting brackets. Conveying structures for conveying PCB boards are respectively installed at both ends of the frame, and a flipping structure for flipping PCB boards is installed between the two conveying structures.

[0007] Furthermore: a linear module is mounted above the mounting bracket; the visual inspection camera is mounted on the drive end of the linear module.

[0008] Furthermore: the conveying structure includes two parallel side plates, each side plate has a first mounting cylinder installed at both ends, and a plurality of second mounting cylinders located between the two first mounting cylinders are installed on the side of the side plate;

[0009] A main drive wheel is rotatably mounted on the first mounting cylinder, and a secondary drive wheel is rotatably mounted on the second mounting cylinder. The two main drive wheels and several secondary drive wheels drive the mounting cylinders on the same conveyor belt. The same first drive shaft is slidably mounted on the two main drive wheels located at the same end. One end of the first drive shaft is connected to a first motor mounted on the outer wall of the frame.

[0010] Furthermore, the two side plates are threaded with the same double-acting screw at their center, and the end of the double-acting screw passes through the frame and is fitted with a rotating handwheel.

[0011] Furthermore: a guide rod is fixed inside the frame along the width direction; the ends of the two side plates are slidably mounted on the same guide rod.

[0012] Furthermore, several pushing blocks are fixed at equal intervals on the outer side wall of the conveyor belt, and the pushing blocks are made of rubber material.

[0013] Furthermore: the flipping structure includes rotating disks symmetrically arranged in the frame, one of the rotating disks having its axis connected to a second motor installed on the outer wall of the frame; a plurality of flipping rods are installed between the two rotating disks, and a flipping plate is installed on the plurality of flipping rods, with a plurality of clamping components installed at equal intervals along the length direction on the flipping plate.

[0014] Furthermore: a slide cylinder is fixed to the side of the rotating disk, and the slide cylinder is slidably mounted on the flipping rod. A locking cylinder is fixed to the outer surface of the slide cylinder, and a fastening bolt that cooperates with the flipping rod is installed on the internal thread of the locking cylinder.

[0015] Furthermore: the clamping assembly includes two third mounting cylinders fixed to the side of the flip plate, and the two third mounting cylinders are located on the same vertical line, with clamping cylinders rotatably mounted on the two third mounting cylinders respectively.

[0016] Furthermore: a second drive shaft is rotatably mounted inside the third mounting cylinder, and one end of each of the two second drive shafts passes through the flip plate and is equipped with a gear, and the two gears mesh with each other. A motor is mounted at the axis of one of the gears; and the motor is mounted on the outer side wall of the flip plate through a mounting base; a slot is provided at the other end of the second drive shaft along the axial direction; and a pin that mates with the slot is fixed on the inner side wall of the clamping cylinder.

[0017] The beneficial effects of this utility model are:

[0018] This invention features a flipping mechanism installed between two conveying mechanisms. After the visual inspection camera inspects one side of the PCB board, the flipping mechanism flips the PCB board to inspect the other side, replacing the traditional manual flipping work, reducing the workload of workers and providing them with convenience. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2This is a three-dimensional structural diagram of the conveying structure in this utility model;

[0021] Figure 3 This is a partial structural schematic diagram of the side plate in this utility model;

[0022] Figure 4 This is an exploded structural diagram of the flipping structure in this utility model;

[0023] Figure 5 This is a partial cross-sectional structural diagram of the flip plate in this utility model.

[0024] The names corresponding to each mark in the diagram:

[0025] 1. Frame; 2. Mounting bracket; 3. Vision inspection camera; 4. Conveying structure; 401. Side plate; 402. First mounting cylinder; 403. Second mounting cylinder; 404. Main drive wheel; 405. Secondary drive wheel; 406. Conveyor belt; 407. First drive shaft; 408. First motor; 409. Bidirectional lead screw; 4010. Rotating handwheel; 4011. Guide rod; 4012. Push block; 5. Tilting structure; 501. Rotating disk; 502. Second motor; 503. Tilting rod; 504. Tilting plate; 505. Clamping assembly; 5051. Third mounting cylinder; 5052. Clamping cylinder; 5053. Second drive shaft; 5054. Gear; 5055. Motor; 5056. Mounting base; 5057. Pin; 506. Slide cylinder; 507. Locking cylinder; 508. Fastening bolt; 6. Linear module. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0027] A PCB surface defect detection device includes a frame 1. Two "L"-shaped mounting brackets 2 are installed on the side of the frame 1, and a linear module 6 (the linear module is prior art and will not be described in detail here) is installed above the mounting brackets 2. The linear module 6 drives a vision inspection camera 3 (the vision inspection camera is prior art and will not be described in detail here) installed at the drive end of the linear module 6 to move. It should be noted that one vision inspection camera 3 is used to inspect the front of the PCB board, and the other vision inspection camera 3 is used to inspect the back of the PCB board, thereby improving the inspection effect.

[0028] The frame 1 has two conveyor structures 4 installed at its two ends, and the two conveyor structures 4 are located below the mounting bracket 2. The conveyor structures 4 are used to transport PCB boards. A flipping structure 5 is installed between the two conveyor structures 4. When the PCB board is transported to the flipping structure 5, it can be flipped 180° and transported to the other conveyor structure 4, replacing the traditional manual flipping work, reducing the workload of the staff and easing their labor burden.

[0029] It should be noted that the two conveying structures 4 are completely identical. For ease of description, this application only describes one of the conveying structures 4:

[0030] The conveying structure 4 includes two side plates 401 located within the frame 1, and the two side plates 401 are arranged parallel to each other. Each side plate 401 has a first mounting cylinder 402 fixed at both ends. Each side plate 401 also has several second mounting cylinders 403 equidistantly fixed along its length on its side. These second mounting cylinders 403 are located between the two first mounting cylinders 402 and on the same horizontal line. The two first mounting cylinders 402 have rotating main drive wheels 404, and the multiple second mounting cylinders 403 have rotating auxiliary drive wheels 405 respectively. The two main drive wheels 404 and the multiple auxiliary drive wheels 405... The drive wheel 405 is equipped with a conveyor belt 406, which is used to transport PCB boards. Specifically, several push blocks 4012 are fixed at equal intervals on the outer surface of the conveyor belt 406. When the PCB board is transported to the end of the conveyor structure 4, the push blocks 4012 push it to prevent the PCB board from getting stuck at the position of the flipping structure. It should be noted that the push blocks 4012 are made of rubber to prevent the conveyor belt 406 from interfering during use.

[0031] In detail: A non-circular drive hole is provided at the shaft center of the main drive wheel 404. The same first drive shaft 407 is slidably mounted on the two main drive wheels 404 located at the same end. One end of the first drive shaft 407 is rotatably connected to the inner side wall of the frame 1, and the other end of the first drive shaft 407 is connected to the first motor 408 installed on the outer side wall of the frame 1. The first motor 408 plays a driving role and ensures that the conveyor belt 406 can transport normally.

[0032] It should be noted that the center of both side plates 401 is threaded with the same bidirectional lead screw 409. The bidirectional lead screw 409 allows for adjustment of the spacing between the two conveyor belts 406 according to the size of the PCB board, thereby improving the performance. Both ends of the bidirectional lead screw 409 pass through the frame 1 and are equipped with rotating handwheels 4010. The rotating handwheels 4010 facilitate the rotation of the bidirectional lead screw 409, providing convenience for the operator. Inside the frame 1, a guide rod 4011 is also installed along the width direction. The ends of the two side plates 401 are slidably mounted on the same guide rod 410. The guide rod 410 limits the movement of the side plates 401, preventing them from rotating during use.

[0033] The flipping structure 5 includes rotating disks 501 symmetrically arranged inside the frame 1. It should be noted that: the axis of one rotating disk 501 is connected to a second motor 502 installed on the outer wall of the frame 1. The second motor 502 is a servo motor; the axis of the other rotating disk 501 is rotatably installed on the inner wall of the frame 1. Several parallel flipping rods 503 are fixed between the two rotating disks 501. Two flipping plates 504 are installed on the multiple flipping rods 503, and several clamping components 505 are installed equidistantly along the length direction on the flipping plates 504. The clamping components 505 are used to clamp the PCB board and prevent the PCB board from falling during the flipping process.

[0034] It should be noted that the flip plate 504 is connected to several flip rods 503 by a sliding method, which allows the gap between the two flip plates 504 to be adjusted according to the width of the PCB board, enabling the use of PCB boards of different sizes and improving the usability of the device. A slide cylinder 506 is fixed on the flip plate 504, and the slide cylinder 506 is coaxially arranged with the flip rods 503. A locking cylinder 507 is fixed on the outer surface of the slide cylinder 506, and a fastening bolt 508 is threaded on the locking cylinder 507. Through the cooperation of the fastening bolt 508, the flip plate 504 is fastened, preventing the flip plate 504 from rotating during use.

[0035] In detail: The clamping assembly 505 includes two third mounting cylinders 5051 fixed to the side of the flip plate 504, and the two third mounting cylinders 5051 are located on the same vertical line. Clamping cylinders 5052 are rotatably mounted on the two third mounting cylinders 5051 respectively. It should be noted that the outer surface of the clamping cylinder 5052 is fixed with a rubber sleeve. The rubber sleeve is designed to protect the PCB board and prevent the PCB board from being damaged due to excessive clamping force.

[0036] The second drive shaft 5053 is rotatably mounted inside the third mounting cylinder 5051, and a slot is provided on the outer surface of the second drive shaft 5053 along the axial direction. A pin 5057 is fixed on the outer surface of the second motor 502 along the axial direction. Through the setting of the pin 5057 and the slot, the second drive shaft 5053 can drive the clamping cylinder 5052 to rotate. It should be noted that one end of each of the two second drive shafts 5053 passes through a gear 5054 and is fixed to a gear 5054. The two gears 5054 mesh with each other. A motor 5055 is fixed at the axis of one of the gears 5054. The motor 5055 plays a driving role. The motor 5055 is fixed on the mounting base 5056, and the mounting base 5056 is installed on the outer wall of the gear 5054.

[0037] Before inspecting a PCB board: First, adjust the width of the conveying mechanism 4 and the width of the flipping structure 5 according to the size of the PCB board; so as to be able to adapt to PCB boards of different sizes.

[0038] When adjusting the width of the conveying mechanism 4: the bidirectional lead screw 409 is rotated, and the bidirectional lead screw 409 can drive the two side plates 401 to move in opposite directions. The side plates 401 can drive the conveyor belt 506 to move, thereby adjusting the distance between the two conveyor belts 506 and adapting to PCB boards of different sizes.

[0039] When adjusting the width of the flipping mechanism 5: first loosen the fastening bolt 508, the slide cylinder 506 can drive several clamping components 505 to move through the flipping plate 504, thereby adjusting the distance between the two flipping plates 504 to accommodate PCBs of different sizes.

[0040] When inspecting a PCB board: First, the PCB board is placed on one of the conveyor structures 4. Two first motors 408 on the conveyor structure 4 drive the first drive shafts 407 to rotate. The first drive shafts 407 drive the main drive wheels 404 to rotate. Through the cooperation of the two main drive wheels 404 and several auxiliary drive wheels 405, the conveyor belts 406 are driven to move. The two conveyor belts 406 move the PCB board. When the PCB board moves directly below the vision inspection camera 3, one side can be inspected. The inspected PCB board continues to be conveyed. When the PCB board reaches the flipping structure 5, several motors 5055 rotate simultaneously. The motors 5055, through the cooperation of two gears 4054, drive the second drive shafts 5053 to rotate. 3 can drive the clamping cylinder 5052 to rotate, and the upper and lower clamping cylinders 5052 can clamp and transport the PCB board. When the PCB board is transported to the center position of the flipping mechanism, the transport of the PCB board is stopped, and then the second motor 502 is turned on. The second motor 502 can drive the flipping rod 503 to flip through the rotating disk 501. The flipping rod 503 can drive the flipping plate 504 to flip 180 degrees, thereby flipping the PCB board. Then, the motor 5055 is turned on again, so that the motor 5055 rotates in the opposite direction and drives several clamping cylinders 5052 to move, thereby transporting the flipped PCB board to another conveying structure 4. The other conveying structure 4 also transports the PCB board in the same way. The other side of the PCB board is inspected by another vision inspection camera 3.

Claims

1. A PCB board surface defect detection device, comprising a frame (1), wherein at least two mounting brackets (2) are mounted on the side of the frame (1), and a visual inspection camera (3) for inspecting the PCB board is mounted above the mounting brackets (2), characterized in that: The frame (1) is equipped with a conveying structure (4) for conveying PCB boards at both ends, and a flipping structure (5) for flipping the PCB boards is installed between the two conveying structures (4). A linear module (6) is mounted on top of the mounting bracket (2); the visual inspection camera (3) is mounted on the drive end of the linear module (6); The conveying structure (4) includes two parallel side plates (401), each side plate (401) has a first mounting cylinder (402) installed at both ends, and a plurality of second mounting cylinders (403) located between the two first mounting cylinders (402) are installed on the side of the side plate (401). A main drive wheel (404) is rotatably mounted on the first mounting cylinder (402), and a secondary drive wheel (405) is rotatably mounted on the second mounting cylinder (403). The two main drive wheels (404) and several secondary drive wheels (405) are connected to the same conveyor belt (406). The same first drive shaft (407) is slidably mounted on the two main drive wheels (404) located at the same end. One end of the first drive shaft (407) is connected to a first motor (408) mounted on the outer wall of the frame (1). The two side plates (401) are threaded with the same double-acting screw (409) at their center, and the end of the double-acting screw (409) passes through the frame (1) and is fitted with a rotating handwheel (4010).

2. The PCB board surface defect detection device according to claim 1, characterized in that: The frame (1) has a guide rod (4011) fixed inside along the width direction; the ends of the two side plates (401) are slidably mounted on the same guide rod (4011).

3. The PCB board surface defect detection device according to claim 1, characterized in that: The outer side wall of the conveyor belt (406) is fixed with a number of push blocks (4012) at equal intervals, and the push blocks (4012) are made of rubber material.

4. The PCB board surface defect detection device according to claim 1, characterized in that: The flipping structure (5) includes a rotating disk (501) symmetrically arranged in the frame (1), one of the rotating disks (501) is connected to a second motor (502) installed on the outer wall of the frame (1) at its axis; a plurality of flipping rods (503) are installed between the two rotating disks (501), a flipping plate (504) is installed on the plurality of flipping rods (503), and a plurality of clamping components (505) are installed equidistantly along the length direction on the flipping plate (504).

5. The PCB board surface defect detection device according to claim 4, characterized in that: The side of the rotating disk (501) is fixed with a slide cylinder (506), and the slide cylinder (506) is slidably mounted on the flip rod (503). The outer surface of the slide cylinder (506) is fixed with a locking cylinder (507), and the internal thread of the locking cylinder (507) is fitted with a fastening bolt (508) that cooperates with the flip rod (503).

6. The PCB board surface defect detection device according to claim 4, characterized in that: The clamping assembly (505) includes two third mounting cylinders (5051) fixed to the side of the flip plate (504), and the two third mounting cylinders (5051) are located on the same vertical line. Clamping cylinders (5052) are rotatably mounted on the two third mounting cylinders (5051).

7. A PCB board surface defect detection device according to claim 6, characterized in that: The third mounting cylinder (5051) has a second drive shaft (5053) rotatably mounted inside. One end of each of the two second drive shafts (5053) passes through the flip plate (504) and is fitted with meshing gears (5054). A motor (5055) is mounted at the axis of one of the gears (5054). The motor (5055) is mounted on the outer wall of the flip plate (504) via a mounting base (5056). The other end of the second drive shaft (5053) has a slot along the axial direction. The inner wall of the clamping cylinder (5052) is fixed with a pin (5057) that mates with the slot.

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