Visual detection device for circuit board

Abstract

The invention discloses a circuit board visual inspection device which comprises a conveyor belt and a bearing template, a step surface is arranged at the upper end of the bearing template, a board inlet is formed in one side, facing the conveyor belt, of the bearing template, an overturning template is slidably mounted at the upper end of the bearing template, and a rotating semi-ring is fixedly mounted on the supporting frame. Rotating half columns are arranged on the two sides of the bearing formwork and the two sides of the overturning formwork correspondingly, a rotating drive is slidably installed on the supporting frame, a butt joint sleeve is installed at the output end of the rotating drive, the rotating drive is connected with a sliding drive, and at least two positioning pins are slidably installed on the two sides of the supporting frame correspondingly. Corresponding positioning holes are formed in the two sides of the bearing mold plate and the two sides of the overturning mold plate, the positioning pins are connected with a plug pin driver, a mold closing driver is fixedly installed at the upper end of the supporting frame, and a visual sensor is fixedly installed at the upper end of the supporting frame. According to the invention, the bearing template and the overturning template are arranged to overturn the circuit board, so that the visual sensor can shoot both sides of the circuit board and detect the circuit board.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit board detection, and relates to a circuit board visual detection device. Background Art

[0002] The production process of circuit boards requires multiple steps such as printing, installing electronic components, and soldering electronic components. During the production process of circuit boards, scratches, dents, incorrect installation of electronic components, poor soldering joints, etc. may occur, which may cause great impact during use.

[0003] After the production of circuit boards, most of them are inspected manually, which is inefficient. With the development of visual sensor technology and image comparison technology, the inspection of circuit boards begins by comparing them with standard images taken by visual sensors, which greatly improves the inspection efficiency of circuit boards. However, in the current circuit board visual inspection devices, most equipment can only inspect the side of the circuit board where electronic components are soldered, making it difficult to detect soldering problems on the circuit board. Summary of the invention

[0004] In view of the above problems, the present invention proposes a circuit board visual inspection device, which well solves the problems in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A circuit board visual inspection device, characterized by comprising:

[0007] A conveyor belt, comprising an input belt and an output belt, wherein one end of the input belt is opposite to the output belt;

[0008] A receiving template, the receiving template is annular, a step surface is provided on the upper end of the receiving template, and the receiving template is located between the input belt and the output belt;

[0009] A plate entry opening, the plate entry opening being opened on a side of the receiving template facing the end of the input belt;

[0010] A flip template, the flip template is slidably mounted on the upper end of the receiving template, and the flip template is a mirror image structure of the receiving template;

[0011] A support frame, the support frame is fixedly installed between the input belt and the output belt;

[0012] Flip bracket, two flip brackets are fixedly installed on both sides of the support frame, a rotating half ring is fixedly installed on the upper end of the support frame, and rotating half columns are arranged on both sides of the receiving template and the flip template, and the rotating half columns of the receiving template are rotatably installed on the corresponding rotating half rings;

[0013] A rotation drive, the rotation drive is slidably mounted on the support frame, a docking sleeve is mounted on the output end of the rotation drive, the docking sleeve is plugged and connected to the rotating semi-column to drive the rotating semi-column to rotate, and the rotation drive is connected to a sliding drive;

[0014] Positioning pins, at least two of which are slidably mounted on both sides of the support frame, and corresponding positioning holes are provided on both sides of the receiving template and the flip template, and the positioning pins are connected to a latch drive;

[0015] A mold clamping drive, wherein the mold clamping drive is fixedly mounted on the upper end of the support frame, and an output end of the mold clamping drive is detachably connected to the receiving template or the flip template;

[0016] A visual sensor is fixedly mounted on the upper end of the support frame, and the visual sensor faces the center of the receiving template.

[0017] Optionally, the mold clamping drive is a cylinder, the mold clamping drive output end is fixedly connected to a suction cup, the suction cup is connected to an air pump, and the mold clamping drive is provided in plurality.

[0018] Optionally, the docking sleeve is a spline tube, and the rotating half-column is a spline shaft.

[0019] Optionally, both sides of the input belt are slidably mounted with tidying plates, and the tidying plates are connected to a tidying drive, and the tidying drive drives the tidying plates to slide.

[0020] Optionally, a plurality of rollers are provided at one end of the tidying plate close to the input belt.

[0021] Optionally, a proximity switch is installed at the position of the regular plate.

[0022] Optionally, a sliding rod is fixedly connected between the tidying plate and the tidying drive, and the sliding rod is threadedly connected with a fixing bolt to fix the length of the sliding rod.

[0023] Optionally, an outlet port is provided at one end of the receiving template away from the entry port, a through hole is provided on the side of the receiving template, a limit pin is slidably installed in the through hole, a return spring is provided between the limit pin and the through hole, an electromagnet is installed on the outside of the receiving template, and the end of the limit pin close to the electromagnet is a magnetic end.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. By setting up a receiving template and a flipping template to flip the circuit board, the visual sensor can shoot and detect both sides of the circuit board, reducing the possibility that some problems of the circuit board cannot be detected;

[0026] 2. When the circuit board enters the receiving template, the circuit board needs to enter the placement groove, and the position of the circuit board is adjusted by setting the regular plate to facilitate the circuit board to fall into the placement groove;

[0027] 3. After the circuit board is flipped, it is in a flipped state when it enters the output belt, which may affect the subsequent processes. By setting a board outlet, after the flipping and shooting is completed, it is flipped again so that the circuit board enters the output belt from the board outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of the overall internal structure of an embodiment of the present invention;

[0030] Figure 3 is a schematic structural diagram of a rotating half ring portion of an embodiment of the present invention;

[0031] Figure 4 yes Figure 3 A magnified schematic diagram of part B;

[0032] Figure 5 yes Figure 1 Enlarged schematic diagram of part A.

[0033] Figure numerals: 1. conveyor belt; 11. input belt; 12. output belt; 13. regular plate; 14. regular drive; 141. sliding rod; 142. fixing bolt; 21. receiving template; 211. plate inlet; 212. plate outlet; 213. limit pin; 214. return spring; 215. electromagnet; 22. flip template; 3. support frame; 31. flip bracket; 311. rotating semi-ring; 312. rotating semi-column; 313. docking sleeve; 32. rotating drive; 321. sliding drive; 33. positioning pin; 331. positioning hole; 332. latch drive; 34. mold clamping drive; 341. suction cup; 4. visual sensor. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-Figure 5 , which is a circuit board visual inspection device disclosed in an embodiment of the present invention, please refer to Figure 2 , including a conveyor belt 1 and a receiving template 21, the conveyor belt 1 includes an input belt 11 and an output belt 12, the input belt 11 and the output belt 12 are opposite at one end, and the receiving template 21 is annular, please refer to Figure 3 The receiving template 21 has a stepped surface at its upper end, and is located between the input belt 11 and the output belt 12. The receiving template 21 has a plate entry 211 on one side of the receiving template 21 facing the end of the input belt 11. A flip template 22 is slidably mounted on the upper end of the receiving template 21. The flip template 22 is a mirror image of the receiving template 21. A support frame 3 is fixedly mounted between the input belt 11 and the output belt 12. Flip brackets 31 are fixedly mounted on both sides of the support frame 3. A rotating half ring 311 is fixedly mounted on the upper end of the support frame 3. A rotating half column 312 is provided on both sides of the receiving template 21 and the flip template 22. The rotating half column 312 of the receiving template 21 is rotatably mounted on the corresponding rotating half ring 311. The support frame 3 is slidably mounted with a rotating drive 32. A docking sleeve 313 is installed at the output end of the rotating drive 32. The docking sleeve 313 is plugged and connected to the rotating half column 312 to drive the rotating half column 312 to rotate. The rotating drive 32 is connected to a sliding drive 321. At least two positioning pins 33 are slidably mounted on both sides of the support frame 3. Please refer to Figure 4 The receiving template 21 and the flip template 22 are both provided with corresponding positioning holes 331, and the positioning pin 33 is connected with a latch drive 332, see Figure 3 A clamping drive 34 is fixedly installed on the upper end of the support frame 3, and the output end of the clamping drive 34 is detachably connected to the receiving template 21 or the flip template 22. A visual sensor 4 is fixedly installed on the upper end of the support frame 3, and the visual sensor 4 is facing the center of the receiving template 21.

[0036] Specifically, a receiving template 21 is arranged between the input belt 11 and the output belt 12. The input belt 11 inputs the circuit board into the receiving template 21 from the board entrance 211, and is photographed by the visual sensor 4. Then, under the drive of the mold clamping drive 34, the flipping template 22 is fitted with the receiving template 21, and the rotating half column 312 is sleeved through the docking sleeve 313. The mold clamping drive 34 is separated from the flipping template 22, and after the positioning pin 33 is separated from the positioning hole 331, the rotating drive 32 rotates the receiving template 21 and the flipping template 22 to flip the circuit board. After the flipping is completed, the positioning pin 33 is inserted into the positioning hole 331 to complete the fixation, the docking sleeve 313 slides away from the rotating half column 312, the mold clamping drive 34 pulls up the receiving template 21, and the visual sensor 4 photographs the other side of the circuit board. After the photographing is completed, it is output through the output belt 12.

[0037] In this way, by setting the receiving template 21 and the flipping template 22 to flip the circuit board, the visual sensor 4 can photograph and detect both sides of the circuit board, reducing the possibility that some problems of the circuit board cannot be detected.

[0038] In some feasible ways, the receiving template 21 is a placement ring set according to the shape of the circuit board. The upper end of the receiving template 21 is provided with a placement groove, the bottom of the placement groove is a step surface, and the height of the placement groove is the same as the thickness of the circuit board plate, so that when the visual sensor 4 shoots the circuit board, the receiving template 21 will not cause obstruction. The board entry 211 is set and the circuit board is fed into the input belt 11. To facilitate the circuit board to enter the receiving template 21, the height of the input belt 11 is slightly higher than the bottom surface of the placement groove. Similarly, the bottom surface of the placement groove is slightly higher than the output belt 12. When the circuit board enters or leaves the receiving template 21, the receiving template 21 can be tilted by the rotation drive 32, so that the circuit board slides down to the shooting position or the output belt 12. To facilitate the driving of the docking sleeve 313 when there is only one rotating semi-column 312, the docking sleeve 313 is a spline tube, and the rotating semi-column 312 is a spline shaft. To facilitate the splicing of the two rotating semi-columns 312, one of the rotating semi-columns 312 is provided with a V-shaped groove, and the other rotating semi-column 312 is provided with a V-shaped block at the corresponding position.

[0039] The mold clamping drive 34 can be selected as an electric push rod or a cylinder, and the detachable connection can be selected as a suction cup 341 or an electromagnet. In this embodiment, a cylinder and a suction cup 341 are selected. The output end of the mold clamping drive 34 is fixedly connected to the suction cup 341, and the suction cup 341 is connected to an air pump. The mold clamping drive 34 is provided with multiple ones.

[0040] The support frame 3 includes an outer frame, which is covered with a plate to form a rectangular box-shaped structure. A light source is installed on the top to provide relatively stable ambient light for the visual sensor 4.

[0041] As a specific implementation of a circuit board visual inspection device provided in the application, please refer to Figure 1 A regularization plate 13 is slidably installed on both sides of the input belt 11, and the regularization plate 13 is connected to a regularization drive 14, and the regularization drive 14 drives the regularization plate 13 to slide.

[0042] In general, when the circuit board enters the receiving template 21, the circuit board needs to enter the placement groove. The position of the circuit board is adjusted by setting the regular plate 13 to facilitate the circuit board to fall into the placement groove.

[0043] In some feasible embodiments, the upper ends of both sides of the placement groove are in the shape of outwardly expanded circular chamfers to facilitate the circuit board to enter the placement groove.

[0044] For further information, see Figure 5A plurality of rollers are provided at one end of the regularizing plate 13 close to the input belt 11 .

[0045] It should be understood that the circuit board is in the process of following the movement of the input belt 11 , and by arranging rollers at one end of the tidying plate 13 close to the input belt 11 , the movement state of the circuit board is not affected during the tidying process.

[0046] Furthermore, a proximity switch is installed at the position of the regularizing plate 13 .

[0047] It should be understood that by providing a proximity switch, it is convenient to start the aligning drive 14 when a circuit board passes by.

[0048] Furthermore, a sliding rod 141 is fixedly connected between the tidying plate 13 and the tidying drive 14 , and a fixing bolt 142 is threadedly connected to the sliding rod 141 to fix the length of the sliding rod 141 .

[0049] It should be understood that by providing the sliding rod 141 , it is convenient to adjust the position of the regular plate 13 according to the size of the circuit board.

[0050] In some feasible embodiments, the regularization plate 13 is a C-shaped steel, the roller is installed in the regularization plate 13, the regularization drive 14 can be selected as a cylinder, and the proximity switch can be selected as a laser sensor including a receiving end and a transmitting end. When the receiving end is blocked by the circuit board, the regularization drive 14 is controlled to start.

[0051] As another specific embodiment of a circuit board visual inspection device provided by the application, please refer to Figure 3-Figure 4 An outlet port 212 is provided at one end of the receiving template 21 away from the inlet port 211, a through hole is provided on the side of the receiving template 21, a limit pin 213 is slidably installed in the through hole, a return spring 214 is provided between the limit pin 213 and the through hole, an electromagnet 215 is installed on the outside of the receiving template 21, and the end of the limit pin 213 close to the electromagnet 215 is a magnetic end.

[0052] In combination with specific usage scenarios, after the circuit board is flipped, it is in a flipped state when entering the output belt 12, which may affect subsequent processes. By setting a board outlet 212, after the flipping and shooting is completed, it is flipped again to allow the circuit board to enter the output belt 12 from the board outlet 212.

[0053] In combination with the specific use environment, when the circuit board enters the receiving template 21 and during the flipping process, the circuit board will have a tendency to slide down along the receiving template 21. By providing the limit pin 213, it is convenient to limit the downward movement of the circuit board.

[0054] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A circuit board visual inspection device, characterized in that: include: A conveyor belt, comprising an input belt and an output belt, wherein one end of the input belt is opposite to the output belt; A receiving template, the receiving template is annular, a step surface is provided on the upper end of the receiving template, and the receiving template is located between the input belt and the output belt; A plate entry opening, the plate entry opening being opened on a side of the receiving template facing the end of the input belt; A flip template, the flip template is slidably mounted on the upper end of the receiving template, and the flip template is a mirror image structure of the receiving template; A support frame, the support frame is fixedly installed between the input belt and the output belt; Flip bracket, two flip brackets are fixedly installed on both sides of the support frame, a rotating half ring is fixedly installed on the upper end of the support frame, and rotating half columns are arranged on both sides of the receiving template and the flip template, and the rotating half columns of the receiving template are rotatably installed on the corresponding rotating half rings; A rotation drive, the rotation drive is slidably mounted on the support frame, a docking sleeve is mounted on the output end of the rotation drive, the docking sleeve is plugged and connected to the rotating semi-column to drive the rotating semi-column to rotate, and the rotation drive is connected to a sliding drive; Positioning pins, at least two of which are slidably mounted on both sides of the support frame, and corresponding positioning holes are provided on both sides of the receiving template and the flip template, and the positioning pins are connected to a latch drive; A mold clamping drive, wherein the mold clamping drive is fixedly mounted on the upper end of the support frame, and an output end of the mold clamping drive is detachably connected to the receiving template or the flip template; A visual sensor is fixedly mounted on the upper end of the support frame, and the visual sensor faces the center of the receiving template.

2. A circuit board visual inspection device according to claim 1, characterized in that: The mold clamping drive is a cylinder, the output end of the mold clamping drive is fixedly connected to a suction cup, the suction cup is connected to an air pump, and a plurality of the mold clamping drives are provided.

3. A circuit board visual inspection device according to claim 1, characterized in that: The butt sleeve is a spline tube, and the rotating half column is in the shape of a spline shaft.

4. A circuit board visual inspection device according to claim 1, characterized in that: Structuring plates are slidably mounted on both sides of the input belt, and the strutting plates are connected to a strutting drive, which drives the strutting plates to slide.

5. A circuit board visual inspection device according to claim 4, characterized in that: A plurality of rollers are arranged at one end of the regularizing plate close to the input belt.

6. A circuit board visual inspection device according to claim 4, characterized in that: A proximity switch is installed at the position of the regularized plate.

7. A circuit board visual inspection device according to claim 6, characterized in that: A sliding rod is fixedly connected between the regularization plate and the regularization drive, and the sliding rod is threadedly connected with a fixing bolt to fix the length of the sliding rod.

8. A circuit board visual inspection device according to claim 2, characterized in that: An outlet is provided at one end of the receiving template away from the entry port, a through hole is provided on the side of the receiving template, a limit pin is slidably installed in the through hole, a return spring is provided between the limit pin and the through hole, an electromagnet is installed on the outside of the receiving template, and the end of the limit pin close to the electromagnet is a magnetic end.

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