CN221199506U - Defect detection device of circuit board - Google Patents

Abstract

The utility model discloses a defect detection device of a circuit board, which comprises a frame, a first tray mechanism, a second tray mechanism, a material taking mechanism, a double-shaft moving platform, a clamping jig and a CCD detection device, wherein the first tray mechanism is used for bearing the circuit board to be detected for defects; in addition, the clamping jig can also adapt to clamping circuit boards with different sizes, and has good clamping effect and strong practicability.

Description

Defect detection device of circuit board

Technical Field

The present utility model relates to the field of circuit board detection devices, and in particular, to a defect detection device for a circuit board.

Background

The circuit board is an important electronic component, and is a carrier for electrical connection of electronic components. At present, surface defects such as cold joint, missing joint and missing part and the like are inevitably generated in the manufacturing process of the circuit board, and the surface defects can cause that the circuit board cannot be normally used after being electrified. In order to ensure the production quality of the circuit board, automatic detection equipment is generally used for detecting surface defects of the circuit board leaving the factory, and in order to improve the accuracy of detecting the surface defects of the circuit board, a plurality of pictures are often required to be taken so as to acquire more information from different positions and under different illumination conditions, so that the defects on the surface of the circuit board are detected and analyzed more comprehensively.

In the prior art, a traditional image acquisition mode is generally that a circuit board is placed on a fixed clamp through a manipulator, and a moving image recognition device is used for moving and shooting above the circuit board, so that the circuit board is compared with a good photo through an image recognition method; however, in the process of shooting by the mobile image recognition device, shake can be easily generated, so that a shot detail picture is blurred, and particularly under the condition that high-precision positioning and detail capturing circuit board micropore defects are required, the shake can cause a camera and an internal sensor to slightly move in the shooting process, so that the image is blurred, distorted or a motion blur effect is generated, and the surface defect detection precision of the circuit board is affected; in addition, the conventional fixing clamp for clamping the circuit board is also immovable and adjustable, and when the circuit board with other sizes needs to be replaced for defect detection, the fixing clamp is often required to be disassembled and replaced, and the detection steps are complicated.

Accordingly, the prior art has drawbacks and needs improvement.

Disclosure of utility model

The technical problems to be solved by the utility model are as follows: the circuit board defect detection device is high in image acquisition accuracy and detection accuracy and can adapt to circuit boards of different sizes.

To achieve the purpose, the utility model adopts the following technical scheme: a defect detection device of a circuit board comprises a frame, a first tray mechanism, a second tray mechanism, a material taking mechanism, a double-shaft moving platform, a clamping jig and a CCD detection device;

The first tray mechanism and the second tray mechanism are respectively arranged at two sides of the frame; the first tray mechanism is used for bearing a circuit board to be subjected to defect detection, and the second tray mechanism is used for bearing a circuit board qualified in defect detection;

The double-shaft moving platform is arranged between the first tray mechanism and the second tray mechanism; the double-shaft moving platform is connected with the clamping jig and used for driving the clamping jig to move along the X-axis and Y-axis directions;

The CCD detection device is arranged above the clamping jig and used for detecting whether the circuit board on the clamping jig is qualified or not;

The material taking mechanism is arranged on the frame and is used for clamping the circuit board on the first tray mechanism onto the clamping jig or clamping the circuit board qualified in detection onto the second tray mechanism from the clamping jig.

By adopting the technical scheme, in the defect detection device of the circuit board, the clamping jig comprises a bearing plate, an angular limiting block, an X-axis sliding rail, a first lifting assembly, a Y-axis sliding rail and a second lifting assembly;

The bearing plate is connected with the double-shaft moving platform, the angular limiting block is arranged on the bearing plate and is used for limiting and fixing the right-angle wall of the circuit board;

The X-axis sliding rail is arranged on the bearing plate along the X-axis direction of the angular limiting block, the first lifting assembly is arranged on the X-axis sliding rail, and the first lifting assembly is used for carrying out telescopic lifting on the X-axis side wall direction of the circuit board;

The Y-axis sliding rail is arranged on the bearing plate along the Y-axis direction of the angular limiting block, the second lifting assembly is arranged on the Y-axis sliding rail, and the second lifting assembly is used for carrying out telescopic lifting on the Y-axis side wall direction of the circuit board.

Adopt above-mentioned each technical scheme, the defect detection device of circuit board in, first lift the subassembly and include fixed plate, slide, flexible cylinder and support the piece, the fixed plate passes through slide and X axle slide rail sliding connection, flexible cylinder locates on the fixed plate, flexible cylinder's expansion end sets up towards the X axle lateral wall of circuit board, the support the piece is located flexible cylinder's expansion end for lift the circuit board.

By adopting the technical schemes, in the defect detection device of the circuit board, the middle part of the bearing plate is provided with the avoidance groove, and the rack below the avoidance groove is provided with the top block for supporting the circuit board.

By adopting the technical schemes, the defect detection device of the circuit board further comprises a third tray mechanism, wherein the third tray mechanism is used for placing the circuit board with unqualified defect detection.

By adopting the technical schemes, in the defect detection device of the circuit board, the double-shaft moving platform comprises an X-shaft moving module and a Y-shaft moving module;

The X-axis moving module is arranged on the frame and connected with the Y-axis moving module, and the Y-axis moving module is connected with the clamping jig.

By adopting the technical schemes, in the defect detection device of the circuit board, the material taking mechanism comprises a transverse moving module, a feeding sucker assembly and a discharging sucker assembly;

The feeding sucker assembly and the discharging sucker assembly are respectively connected with the transverse moving module, and the feeding sucker assembly is used for clamping the circuit board on the first tray mechanism onto the clamping fixture;

The blanking sucker assembly is used for clamping the circuit board on the clamping jig onto the second tray mechanism or the third tray mechanism.

By adopting the technical schemes, in the defect detection device of the circuit board, the feeding sucker assembly comprises a mounting plate, a lifting cylinder, a sucker frame, a vacuum suction nozzle and a pressure sensor;

The mounting plate is connected with the transverse moving module, the lifting cylinder is arranged on the mounting plate, and the movable end of the lifting cylinder is connected with the sucker frame to drive the sucker frame to move up and down;

The vacuum suction nozzles are arranged on the sucker frame and adsorb the circuit board through negative pressure;

the pressure sensor is arranged on the sucker frame and used for detecting the pressure between the vacuum suction nozzle and the circuit board.

Compared with the prior art, the utility model has the following beneficial effects:

The first tray mechanism is used for bearing the circuit board to be detected by defects, the material taking mechanism can clamp the circuit board on the first tray mechanism onto the clamping jig, the double-shaft moving platform can drive the clamping jig to move in the XY axis direction so as to adjust the position of the circuit board, the CCD detection device above the clamping jig can shoot images of multiple positions on the circuit board, the images are compared with good-quality photos by an image recognition method, the defect detection of the circuit board is completed, and the circuit board which is qualified in detection is clamped onto the second tray mechanism by the material taking mechanism for stacking and collecting; the detection device adopts a mode of moving the position of the circuit board to enable the fixed CCD detection device to shoot the image of the circuit board, compared with a mode of shooting by moving the CCD detection device, the detection device can reduce the shake caused by moving a camera and a sensor element in the CCD detection device, thereby improving the shooting precision of the image and avoiding the distortion or the blurring of the image; meanwhile, the clamping jig can adapt to clamping circuit boards with different sizes, is good in clamping effect, does not need to be replaced when detecting defects of circuit boards with other specifications, and is high in practicability.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the utility model, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the utility model, without affecting the effect or achievement of the objective.

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a reclaimer mechanism of the present utility model;

FIG. 3 is a schematic diagram of a clamping structure between a clamping fixture and a circuit board according to the present utility model;

Fig. 4 is a schematic structural diagram of the clamping fixture of the present utility model.

Illustration of:

1. A frame; 2. a first tray mechanism; 3. a second tray mechanism; 4. a material taking mechanism; 41. a lateral movement module; 42. a feeding sucker assembly; 421. a mounting plate; 422. a lifting cylinder; 423. a suction cup holder; 424. a vacuum suction nozzle; 425. a pressure sensor; 43. a blanking sucker assembly; 5. a biaxial moving platform; 51. an X-axis moving module; 52. a Y-axis moving module; 6. clamping a jig; 61. a carrying plate; 610. an avoidance groove; 62. an angular limiting block; 63. an X-axis sliding rail; 64. a first lifting assembly; 641. a fixing plate; 642. a slide; 643. a telescopic cylinder; 644. a support block; 645. a top block; 65. a Y-axis sliding rail; 66. a second lifting assembly; 7. a CCD detection device; 8. and a third tray mechanism.

Detailed Description

In order to make the objects, features and advantages of the present utility model more comprehensible, the technical solutions in the embodiments of the present utility model are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. It is noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 4, an embodiment of the present utility model provides a defect detection device for a circuit board, which includes a frame 1, a first tray mechanism 2, a second tray mechanism 3, a material taking mechanism 4, a dual-axis moving platform 5, a clamping fixture 6, and a CCD detection device 7; the first tray mechanism 2 and the second tray mechanism 3 are respectively arranged on two sides of the frame 1, the first tray mechanism 2 is used for bearing a circuit board to be detected by defects, the second tray mechanism 3 is used for bearing a circuit board qualified by defects, and the double-shaft moving platform 5 is arranged between the first tray mechanism 2 and the second tray mechanism 3; the double-shaft moving platform 5 is connected with the clamping jig 6 and is used for driving the clamping jig 6 to move along the X-axis and Y-axis directions, the clamping jig 6 is used for positioning and clamping a circuit board to be detected, the CCD detection device 7 is arranged above the clamping jig 6 and is used for detecting whether the circuit board on the clamping jig 6 is qualified or not, the material taking mechanism 4 is arranged on the frame 1 and is used for clamping the circuit board on the first tray mechanism 2 onto the clamping jig 6 or clamping the circuit board qualified to be detected onto the second tray mechanism 3 from the clamping jig 6. The first tray mechanism 2 is used for bearing a circuit board to be detected for defects, the material taking mechanism 4 can clamp the circuit board on the first tray mechanism 2 onto the clamping jig 6, the double-shaft moving platform 5 can drive the clamping jig 6 to move in the XY axis direction so as to adjust the position of the circuit board, the CCD detection device 7 above the clamping jig 6 can shoot images of multiple positions on the circuit board, the images are compared with good photos through an image recognition method, the defect detection of the circuit board is completed, and the circuit board which is qualified in detection is clamped onto the second tray mechanism 3 by the material taking mechanism 4 for stacking and collecting; the detection device adopts a mode of moving the position of the circuit board to enable the fixed CCD detection device 7 to shoot the image of the circuit board, compared with a mode of shooting by moving the CCD detection device 7, the detection device can reduce shake caused by moving a camera and a sensor element inside the CCD detection device 7 during shooting, thereby improving the shooting precision of the image and avoiding image distortion or blurring.

As shown in fig. 3 and 4, the clamping fixture 6 further includes a carrying plate 61, an angular limiting block 62, an X-axis sliding rail 63, a first lifting assembly 64, a Y-axis sliding rail 65, and a second lifting assembly 66, where the carrying plate 61 is connected with the dual-axis moving platform 5, the angular limiting block 62 is disposed on the carrying plate 61, the angular limiting block 62 is used for limiting and fixing a right-angle wall of the circuit board, the X-axis sliding rail 63 is disposed on the carrying plate 61 along an X-axis direction of the angular limiting block 62, the first lifting assembly 64 is disposed on the X-axis sliding rail 63, the first lifting assembly 64 is used for performing telescopic lifting on an X-axis side wall direction of the circuit board, the Y-axis sliding rail 65 is disposed on the carrying plate 61 along a Y-axis direction of the angular limiting block 62, and the second lifting assembly 66 is disposed on the Y-axis sliding rail 65, and the second lifting assembly 66 is used for performing telescopic lifting on a Y-axis side wall direction of the circuit board. The clamping jig 6 can be adapted to clamp circuit boards of different sizes, specifically, when the circuit boards need to be clamped, the material taking mechanism 4 is firstly attached to one corner wall of the circuit boards on the inner wall of the corner limiting block 62, and then the first lifting assembly 64 and the second lifting assembly 66 are respectively extended outwards so as to respectively lift the X-axis side wall and the Y-axis side wall of the circuit boards, thereby realizing stable clamping of the circuit boards. The arrangement of the X-axis sliding rail 63 can facilitate people to adjust the distance between the first lifting assembly 64 and the angular limiting block 62 in the X-axis direction; the Y-axis sliding rail 65 is provided to facilitate the adjustment of the distance between the second lifting assembly 66 and the angular stopper 62 in the Y-axis direction.

Further, the first lifting assembly 64 includes a fixing plate 641, a sliding seat 642, a telescopic cylinder 643 and a supporting block 644, the fixing plate 641 is slidably connected with the X-axis sliding rail 63 through the sliding seat 642, the telescopic cylinder 643 is disposed on the fixing plate 641, a movable end of the telescopic cylinder 643 is disposed towards an X-axis side wall of the circuit board, and the supporting block 644 is disposed at the movable end of the telescopic cylinder 643 and is used for lifting the circuit board. The telescopic cylinder 643 can push the supporting block 644 to perform telescopic movement, so that the supporting block 644 is lifted at the side end of the circuit board. In this embodiment, the second lifting assembly 66 has the same structure and operation principle as the first lifting assembly 64. In addition, the supporting block 644 in the present embodiment is made of polyurethane material, so as to avoid scratch or abrasion to the circuit board during the process of lifting and clamping the circuit board. After the position of the fixing plate 641 is determined on the X-axis sliding rail 63, the fixing plate 641 and the carrier plate 61 are fixed by a locking bolt to prevent the fixing plate 641 from sliding on the X-axis sliding rail 63.

As shown in fig. 4, further, an avoidance groove 610 is formed in the middle of the bearing plate 61, and a top block 645 for supporting the circuit board is disposed on the frame 1 below the avoidance groove 610. The top block 645 can support the circuit board, and the upper end surface of the top block 645 and the supporting surface of the supporting block 644 are located on the same horizontal plane.

As shown in fig. 1, further, the device further includes a third tray mechanism 8, where the third tray mechanism 8 is used for placing a circuit board that is not qualified for defect detection. When the circuit board is unqualified, the material taking mechanism 4 can convey the unqualified products to the third tray mechanism 8 for stacking and collecting. The first tray mechanism 2, the second tray mechanism 3, and the third tray mechanism 8 have the same structure and are used for carrying the circuit board.

As shown in fig. 3, the dual-axis moving platform 5 further includes an X-axis moving module 51 and a Y-axis moving module 52, the X-axis moving module 51 is disposed on the frame 1, the X-axis moving module 51 is connected with the Y-axis moving module 52, and the Y-axis moving module 52 is connected with the clamping fixture 6. The X-axis moving module 51 is used for driving the clamping jig 6 to move in the X-axis direction, and the Y-axis moving module 52 is used for driving the clamping jig 6 to move in the Y-axis direction, so that biaxial movement of the clamping jig 6 is realized. It should be noted that, as the disclosed prior art, the X-axis moving module 51 and the Y-axis moving module 52 are not described in detail in the specific structure and the working principle of the X-axis moving module 51 and the Y-axis moving module 52.

As shown in fig. 1 and 2, further, the material taking mechanism 4 includes a lateral movement module 41, a feeding sucker assembly 42 and a discharging sucker assembly 43, the feeding sucker assembly 42 and the discharging sucker assembly 43 are respectively connected with the lateral movement module 41, the feeding sucker assembly 42 is used for clamping a circuit board on the first tray mechanism 2 onto the clamping fixture 6, and the discharging sucker assembly 43 is used for clamping a circuit board on the clamping fixture 6 onto the second tray mechanism 3 or the third tray mechanism 8. The transverse moving module 41 can drive the feeding sucker assembly 42 and the discharging sucker assembly 43 to synchronously and transversely move so as to realize material taking station switching of the circuit board. In this embodiment, the feeding sucker assembly 42 is capable of simultaneously taking the circuit board to be detected on the first tray mechanism 2 and simultaneously sucking the circuit board detected on the clamping fixture 6 by the discharging sucker assembly 43.

As shown in fig. 2, further, the feeding suction cup assembly 42 includes a mounting plate 421, a lifting cylinder 422, a suction cup frame 423, vacuum suction nozzles 424 and a pressure sensor 425, the mounting plate 421 is connected with the lateral movement module 41, the lifting cylinder 422 is disposed on the mounting plate 421, a movable end of the lifting cylinder 422 is connected with the suction cup frame 423 to drive the suction cup frame 423 to move up and down, a plurality of the vacuum suction nozzles 424 are disposed on the suction cup frame 423 and adsorb a circuit board through a negative pressure effect, and the pressure sensor 425 is disposed on the suction cup frame 423 to be used for detecting pressure between the vacuum suction nozzles 424 and the circuit board. When the pressure sensor 425 detects that the pressure between the vacuum nozzle 424 and the circuit board reaches the preset threshold, the lifting cylinder 422 stops operating, so as to avoid the pressure loss caused by the overlarge pressure on the circuit board. In this embodiment, the structure of the feeding suction cup assembly 42 is the same as that of the discharging suction cup assembly 43.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (8)

1. The defect detection device of the circuit board is characterized by comprising a frame (1), a first tray mechanism (2), a second tray mechanism (3), a material taking mechanism (4), a double-shaft moving platform (5), a clamping jig (6) and a CCD detection device (7);

The first tray mechanism (2) and the second tray mechanism (3) are respectively arranged at two sides of the frame (1); the first tray mechanism (2) is used for bearing a circuit board to be subjected to defect detection, and the second tray mechanism (3) is used for bearing a circuit board qualified in defect detection;

the double-shaft moving platform (5) is arranged between the first tray mechanism (2) and the second tray mechanism (3); the double-shaft moving platform (5) is connected with the clamping jig (6) and is used for driving the clamping jig (6) to move along the X-axis and Y-axis directions;

the clamping jig (6) is used for positioning and clamping a circuit board to be detected, and the CCD detection device (7) is arranged above the clamping jig (6) and used for detecting whether the circuit board on the clamping jig (6) is qualified or not;

The material taking mechanism (4) is arranged on the frame (1) and is used for clamping the circuit board on the first tray mechanism (2) onto the clamping jig (6) or clamping the circuit board qualified in detection onto the second tray mechanism (3) from the clamping jig (6).

2. The defect detection device of the circuit board according to claim 1, wherein the clamping jig (6) comprises a bearing plate (61), an angular limiting block (62), an X-axis sliding rail (63), a first lifting assembly (64), a Y-axis sliding rail (65) and a second lifting assembly (66);

The bearing plate (61) is connected with the double-shaft moving platform (5), the angular limiting block (62) is arranged on the bearing plate (61), and the angular limiting block (62) is used for limiting and fixing the right-angle wall of the circuit board;

The X-axis sliding rail (63) is arranged on the bearing plate (61) along the X-axis direction of the angular limiting block (62), the first lifting assembly (64) is arranged on the X-axis sliding rail (63), and the first lifting assembly (64) is used for carrying out telescopic lifting on the X-axis side wall direction of the circuit board;

The Y-axis sliding rail (65) is arranged on the bearing plate (61) along the Y-axis direction of the angular limiting block (62), the second lifting assembly (66) is arranged on the Y-axis sliding rail (65), and the second lifting assembly (66) is used for carrying out telescopic lifting on the Y-axis side wall direction of the circuit board.

3. The defect detection device for a circuit board according to claim 2, wherein the first lifting assembly (64) comprises a fixed plate (641), a sliding seat (642), a telescopic cylinder (643) and a supporting block (644), the fixed plate (641) is slidably connected with the X-axis sliding rail (63) through the sliding seat (642), the telescopic cylinder (643) is arranged on the fixed plate (641), a movable end of the telescopic cylinder (643) is arranged towards an X-axis side wall of the circuit board, and the supporting block (644) is arranged at the movable end of the telescopic cylinder (643) and is used for lifting the circuit board.

4. The defect detection device for the circuit board according to claim 2, wherein an avoidance groove (610) is formed in the middle of the bearing plate (61), and a top block (645) for supporting the circuit board is arranged on the frame (1) below the avoidance groove (610).

5. The device for detecting the defects of the circuit board according to claim 1, further comprising a third tray mechanism (8), wherein the third tray mechanism (8) is used for placing the circuit board which is unqualified in defect detection.

6. The defect detection device of a circuit board according to claim 1, wherein the biaxial movement platform (5) includes an X-axis movement module (51) and a Y-axis movement module (52);

The X-axis moving module (51) is arranged on the frame (1), the X-axis moving module (51) is connected with the Y-axis moving module (52), and the Y-axis moving module (52) is connected with the clamping jig (6).

7. The defect detection device of the circuit board according to claim 5, wherein the material taking mechanism (4) comprises a transverse moving module (41), a feeding sucker assembly (42) and a discharging sucker assembly (43);

The feeding sucker assembly (42) and the discharging sucker assembly (43) are respectively connected with the transverse moving module (41), and the feeding sucker assembly (42) is used for clamping a circuit board on the first tray mechanism (2) onto the clamping fixture (6);

The blanking sucker assembly (43) is used for clamping the circuit board on the clamping jig (6) onto the second tray mechanism (3) or the third tray mechanism (8).

8. The defect detection device of a circuit board according to claim 7, wherein the feeding suction cup assembly (42) comprises a mounting plate (421), a lifting cylinder (422), a suction cup holder (423), a vacuum suction nozzle (424) and a pressure sensor (425);

The mounting plate (421) is connected with the transverse moving module (41), the lifting cylinder (422) is arranged on the mounting plate (421), and the movable end of the lifting cylinder (422) is connected with the sucker frame (423) to drive the sucker frame (423) to move up and down;

The vacuum suction nozzles (424) are arranged on the sucker frame (423) and adsorb the circuit board through negative pressure; the pressure sensor (425) is arranged on the sucker frame (423) and is used for detecting the pressure between the vacuum suction nozzle (424) and the circuit board.