CN219142686U - Circuit board safety high-precision automatic vision detection equipment - Google Patents

Abstract

The utility model discloses a circuit board safety high-precision automatic visual detection device, which comprises a frame, a product transmission mechanism, a motion mechanism, an image capturing mechanism, a product supporting mechanism, an upper polishing mechanism and a lower polishing mechanism; the product transmission mechanism comprises a belt transmission module and a positioning device; the rack is provided with a product supporting mechanism, and the product supporting mechanism comprises a linear driving unit and a supporting platform; the motion mechanism comprises an X-axis motion module and a Y-axis motion module, and the image capturing mechanism is driven by the X-axis motion module and the Y-axis motion module to move on an X-Y plane; the image capturing mechanism is provided with an upper polishing mechanism for polishing downwards, and a lower polishing mechanism for polishing upwards is arranged below a motion path of the image capturing mechanism. According to the scheme, through improvement of the product supporting mechanism, the Y-axis movement module and the lower polishing mechanism, the detection efficiency and the detection accuracy of detecting products are improved, the production efficiency is improved, standardized operation can be guaranteed, and the production quality is improved.

Description

Circuit board safety high-precision automatic vision detection equipment

Technical Field

The utility model relates to the technical field of automatic equipment, in particular to circuit board safety high-precision automatic visual detection equipment applied to a PCB in the SMT industry.

Background

A printed wiring board (PCB board) is a main supporting object for providing electronic component mounting, and connects electronic components together so that they perform an integral function, which is an essential component of all electronic products. Because the PCB production technology relates to various process technologies, any procedure is problematic and can affect the quality of products. With the rapid development of industries such as communications and computers, there is a demand for higher quality of printed circuit boards. The original detection means are gradually not suitable for the development trend of the current PCB technology, so that a new PCB detection means are necessary to be researched.

At present, the manufacturing process problem in the production process of the PCB product and the process of transferring the PCB product and the like can damage the PCB product to different degrees, defects of the PCB product are observed and judged by a microscope, long-time personnel observation can cause great damage to human eyes, the personnel have secondary pollution risks of the product due to close contact with the PCB during detection, and the long-time microscope manually judges the poor outflow risks caused by visual fatigue, so that a visual system is adopted to acquire images of the product to carry out visual judgment, and the visual judgment can be adopted to well screen and discharge defective products such as pin-arranging tilting, breakage, irregular length, sinking, deformation, part missing, part damage and the like of the PCB, so that the production quality of the product is improved. With the vigorous development of the intelligent PCB detection technology, the traditional manual microscope detection mode is gradually replaced in the near future, so that the quality and efficiency of PCB detection are improved rapidly, and meanwhile, the labor force is greatly reduced.

The prior automatic equipment for visual detection of the PCB generally comprises a feeding conveying mechanism, a motion module and a visual detection mechanism, and in the process of realizing the utility model, the applicant finds that the prior equipment has at least the following technical problems:

1. the existing PCB visual detection equipment can only be used for visual detection of conventional products, comprises conventional colors and conventional structures, has difficulty in acquiring images for some special colors and PCB products difficult to position, and cannot acquire clear and accurate images, so that inaccurate detection results are caused;

2. the existing PCB visual detection equipment is suitable for detecting the PCB with the conventional size, and for large-size products, the products in the Tray are inaccurate in detection due to the sinking of the Tray (Tray) caused by gravity in the detection process due to the gravity;

3. the arrangement of the visual detection mechanism in the existing PCB visual detection equipment adopts an orbit motion module, such as a left-right arrangement of a sliding rail screw pair, namely, a screw and a linear sliding rail are arranged left and right, however, the conventional sliding rail screw pair is longer, the arrangement of the conventional conveying structure causes the automatic detection line body to be longer, the occupied space is large, and the automatic detection line body is not suitable for an environment with limited places.

In view of this, how to solve the problems of inaccurate image acquisition and detection results, large occupied space and the like in the existing automatic equipment for performing visual detection on the PCB board becomes the subject to be studied and solved by the present utility model.

Disclosure of Invention

The utility model provides a circuit board safety high-precision automatic visual detection device, which aims to solve the problems of inaccurate image acquisition and detection result, large occupied space and the like in the existing automatic device for visual detection of a PCB.

In order to achieve the above purpose, the utility model provides a circuit board safety high-precision automatic vision detection device, which comprises a frame, a product transmission mechanism and a movement mechanism, wherein the product transmission mechanism and the movement mechanism are arranged on the frame, the movement mechanism is provided with an image capturing mechanism in a positioning way, the product transmission mechanism is used for transmitting a product to a specified position, the product transmission mechanism comprises a belt transmission module and a positioning device, the belt transmission module is arranged on the frame in a positioning way, a product supporting mechanism is arranged between the belt transmission module and the positioning device on the frame, the product supporting mechanism comprises a linear driving unit and a supporting platform, the linear driving unit is arranged on the frame in a positioning way, the output end of the linear driving unit is upwards connected with the supporting platform, and the linear driving unit drives the supporting platform to reciprocate in the Z direction;

the motion mechanism is a mechanism for driving the image capturing mechanism to move on an X-Y plane and comprises an X-axis motion module and a Y-axis motion module which are arranged on a frame; the image capturing mechanism is arranged on the X-axis movement module, the X-axis movement module is arranged on the Y-axis movement module, and the image capturing mechanism is driven by the X-axis movement module and the Y-axis movement module to move on an X-Y plane; the Y-axis movement module comprises a driving motor, a Y-axis screw rod, a Y-axis movement block and a Y-axis linear slide rail, wherein the Y-axis screw rod is arranged right above the Y-axis linear slide rail in parallel;

the imaging mechanism is provided with an upper polishing mechanism for polishing downwards, and a lower polishing mechanism for polishing upwards is arranged below a motion path of the imaging mechanism.

The content of the present utility model is explained as follows:

1. according to the technical scheme, the problems of inaccurate image acquisition and detection results, large occupied space and the like existing in the existing automatic equipment for carrying out visual detection on the PCB are studied and designed, and the designed circuit board safe high-precision automatic visual detection equipment can effectively reduce the size of the equipment under the condition that the compatible size of the equipment is ensured, and meanwhile, the precision and the efficiency of the automatic visual detection of the circuit board are improved; in the scheme, aiming at products with partial colors and difficult positioning, the lower polishing mechanism is customized and added to polish the products, so that the detection and positioning characteristics of the products are more obvious and clear during detection, and the products can be detected more accurately during detection; aiming at large-size products which are partially detected by Tray loading, a product supporting mechanism is customized and added, so that inaccurate detection caused by Tray sinking due to gravity in the process of detecting the products in Tray is effectively improved; aiming at the limitation to the equipment size due to the line body, the layout mode of the Y-axis screw rod (322) and the Y-axis linear sliding rail is changed from a common left-right mode to an up-down mode, and the equipment size is effectively reduced under the condition of ensuring the compatible size of the equipment.

2. In the above technical scheme, in order to ensure the reliability of product transmission and the accuracy of positioning, the belt transmission module comprises two groups of transmission brackets, a transmission motor and a transmission belt which are arranged in parallel, wherein the transmission brackets are arranged above the frame along the X direction, the transmission belt is arranged on the transmission brackets through transmission wheels, the output end of the transmission motor is connected with the transmission belt in a matched manner through the transmission wheels, and the transmission belt is driven by the transmission motor to move; the positioning devices are oppositely arranged on the two transmission brackets.

3. In the technical scheme, in order to enable the products transmitted to the designated positions to be accurately and reliably positioned and clamped, the positioning device comprises a clamping cylinder and a clamping plate, the clamping plate is provided with a downward-oriented clamping surface, the clamping cylinder drives the clamping plate to reciprocate linearly along the Z direction, and the clamping surface is in close contact with the upper surface of the products to form clamping positioning for the products.

4. In the above technical scheme, in order to let product transport mechanism can adapt to the product of different size scope, be provided with on the product transport mechanism and transfer wide device, transfer wide device including transfer wide lead screw, transfer wide motor, transfer wide belt, two transfer wide lead screw is followed the Y direction and is passed one of them respectively transfer the both ends of support, two transfer wide lead screw's same end assembly transfer wide belt, by transfer wide motor drive transfer wide belt motion, transfer wide belt drive transfer wide lead screw rotation and later adjust the width distance in Y direction between two transmission supports. The corresponding width can be selected along with the size specification of the product, the product width and size diversity can be adapted, various belt lines do not need to be customized again corresponding to products with different sizes, and the cost is saved.

5. In the technical scheme, in order to ensure that the product supporting mechanism can not damage the product when supporting the product, and simultaneously ensure that the product is supported in place, and avoid the reduction of detection accuracy, the product supporting mechanism also comprises a limiting seat, a limiting block and linear bearing guide rails, wherein the linear bearing guide rails are fixed on two sides of the lower end surface of the supporting platform, and the linear bearing guide rails provide guidance for the reciprocating linear motion of the supporting platform along the Z direction; the limiting blocks are arranged at two ends of the supporting platform and are L-shaped, limiting surfaces facing upwards are arranged on the limiting blocks, abutting parts facing downwards are arranged on the limiting seats corresponding to the limiting surfaces, and the limiting surfaces and the abutting parts abut against to serve as limiting of upward displacement of the supporting platform.

6. In the above technical scheme, in order to improve the polishing stability and the polishing effect of lower polishing mechanism, make the product detect and the characteristic of location more obvious clear when detecting, lower polishing mechanism includes light source mount and bar light source, light source mount fixed mounting is in the frame, the length direction of bar light source extends along the X direction.

7. In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically linked, may be directly linked, may be indirectly linked through an intervening medium, and may be in communication between two elements or in an interactive relationship therebetween, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

8. In the present utility model, the terms "center," "upper," "lower," "axial," "bottom," "inner," "outer," and the like refer to an azimuth or positional relationship based on the azimuth or positional assembly relationship shown in the drawings, for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.

9. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

Due to the application of the scheme, compared with the prior art, the utility model has the following advantages and effects:

1. according to the scheme, aiming at the products with partial colors and difficult positioning, the lower polishing mechanism is customized and added to polish the products, so that the detection and positioning characteristics of the products are more obvious and clear during detection, and the products can be detected more accurately during detection;

2. according to the scheme, aiming at large-size products which are detected by partially using Tray loading, the supporting mechanism of the products is customized and added, and the inaccuracy of detection caused by the sag of the Tray due to the gravity in the process of detecting the products in the Tray is effectively improved;

3. according to the scheme, the layout mode of the Y-axis screw rod and the Y-axis linear slide rail is changed from a common left-right mode to an up-down mode, and the size of the equipment is effectively reduced under the condition that the compatible size of the equipment is ensured.

4. According to the scheme, products can be conveyed to the appointed position by the product conveying mechanism for PCB detection, and the motion mechanism drives the image capturing mechanism and the upper polishing mechanism to move so as to detect the products, so that the detection efficiency and the detection accuracy are improved, the production efficiency is improved, the standardized operation can be ensured, and the production quality is improved.

Drawings

FIG. 1 is a schematic perspective view of an automatic vision inspection apparatus according to an embodiment of the present utility model;

FIG. 2 is a top view of an automated vision inspection apparatus in accordance with an embodiment of the present utility model;

FIG. 3 is a right side view of an automatic vision inspection apparatus in accordance with an embodiment of the present utility model;

FIG. 4 is a schematic perspective view of a product conveying mechanism in an automatic vision inspection apparatus according to an embodiment of the present utility model;

FIG. 5 is a top view of a product transport mechanism in an automated vision inspection apparatus in accordance with an embodiment of the present utility model;

FIG. 6 is a schematic perspective view of a product supporting mechanism in an automatic vision inspection apparatus according to an embodiment of the present utility model;

FIG. 7 is a front view of a product support mechanism in an automated vision inspection apparatus in accordance with an embodiment of the present utility model;

FIG. 8 is a schematic perspective view of a product supporting mechanism in an automatic vision inspection apparatus according to an embodiment of the present utility model;

FIG. 9 is a top view of a product support mechanism in an automated vision inspection apparatus in accordance with an embodiment of the present utility model;

fig. 10 is a perspective view showing the overall appearance of an automatic vision inspection apparatus according to an embodiment of the present utility model.

The parts of the above figures are shown as follows:

1. rack

2. Product conveying mechanism

21. Belt transmission module

211. Transmission support

212. Transmission motor

213. Transmission belt

214. Feeding and discharging sensor

22. Positioning device

221. Clamping cylinder

222. Clamping plate

23. Width adjusting device

231. Width-adjustable screw rod

232. Width-adjustable motor

233. Width adjusting belt

3. Motion mechanism

31 X-axis movement module

32 Y-axis movement module

321. Driving motor

322 Y-axis screw rod

323 Y-axis motion block

324 Y-axis linear slide rail

4. Image capturing mechanism

5. Product supporting mechanism

51. Linear drive unit

52. Supporting platform

53. Spacing seat

531. Abutting part

54. Limiting block

541. Limiting surface

55. Linear bearing guide rail

6. Lower polishing mechanism

61. Light source fixing frame

62. Strip-shaped light source

91. Equipment upper cover

92. Operating table

93. Display device

94. Operation button

95. A tri-color lamp.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

As shown in fig. 10, an embodiment of the present utility model provides a circuit board safety high-precision automatic vision inspection apparatus, which has a frame 1, an apparatus upper cover 91 is disposed above the frame 1, and a product conveying mechanism 2, a moving mechanism 3, an image capturing mechanism 4, a product supporting mechanism 5, an upper lighting mechanism, and a lower lighting mechanism 6 of the automatic vision inspection apparatus are disposed inside the apparatus upper cover 91, and an operation table 92, a display 93, operation buttons 94, and a tri-color lamp 95 are disposed on the apparatus upper cover 91.

As shown in fig. 1 to 9, the automatic vision detection device of the utility model comprises a frame 1, a product transmission mechanism 2 and a movement mechanism 3 which are arranged on the frame 1, wherein an image capturing mechanism 4 is arranged on the movement mechanism 3 in a positioning way, the product transmission mechanism 2 is a mechanism for transmitting products to a designated position, the product transmission mechanism 2 comprises a belt transmission module 21 and a positioning device 22, the belt transmission module 21 is arranged on the frame 1 in a positioning way, a product supporting mechanism 5 is arranged between the belt transmission module 21 and the positioning device 22 on the frame 1, the product supporting mechanism 5 comprises a linear driving unit 51 and a supporting platform 52, the linear driving unit 51 is arranged on the frame 1 in a positioning way, the output end of the linear driving unit 51 is upwards connected with the supporting platform 52, and the linear driving unit 51 drives the supporting platform 52 to reciprocate in the Z direction;

the motion mechanism 3 is a mechanism for driving the image capturing mechanism 4 to move in an X-Y plane, and the motion mechanism 3 comprises an X-axis motion module 31 and a Y-axis motion module 32 which are arranged on the frame 1; the image capturing mechanism 4 is arranged on the X-axis movement module 31, the X-axis movement module 31 is arranged on the Y-axis movement module 32, and the image capturing mechanism 4 is driven by the X-axis movement module 31 and the Y-axis movement module 32 to move on an X-Y plane; the Y-axis motion module 32 comprises a driving motor 321, a Y-axis screw rod 322, a Y-axis motion block 323 and a Y-axis linear slide rail 324, wherein the Y-axis screw rod 322 is arranged right above the Y-axis linear slide rail 324 in parallel;

the image capturing mechanism 4 is provided with an upper polishing mechanism (not shown in the drawing) for polishing downwards, the lower polishing mechanism 6 for polishing upwards is arranged below the motion path of the image capturing mechanism 4, the upper polishing mechanism is generally a polishing light source fixed on the image capturing mechanism 4, an annular light source can be selected, and the image capturing mechanism 4 can adopt a high-precision industrial camera.

In the operation process of the equipment, the product is firstly conveyed to the appointed position by the product conveying mechanism 2, the product is positioned and clamped by the positioning device 22 of the product conveying mechanism 2, meanwhile, the product supporting mechanism 5 positioned in the middle of the product conveying mechanism 2 is jacked up to prevent inaccurate detection caused by sinking of the middle of the product due to large size, the upper polishing mechanism and the image capturing mechanism 4 are driven to take pictures and take images one by controlling servo transmission by the motion control system, the lower polishing mechanism 6 polishes the product while taking the images, the image capturing of the product is more convenient to judge, the state of the product is detected by the visual detection system, the product is judged, the supporting mechanism is moved away from the product after detection is finished, and the OK product is conveyed to the next procedure by the product conveying mechanism 2 to be produced by loosening the positioning device 22 by the product conveying mechanism 2; defective products are alarmed and displayed, defective pictures are conveyed to the next working procedure for production by a transmission mechanism after being subjected to repeated judging processing identification by personnel, and the OK product is detected manually in a zero contact mode. Compared with the traditional manual detection mode, the research and development of the circuit board safety high-precision visual detection technology not only improves the production efficiency, but also can ensure standardized operation and improve the production quality.

Through implementation of the embodiment, the designed circuit board safety high-precision automatic vision detection equipment is used for researching and designing the problems of inaccurate image acquisition, inaccurate detection result, large occupied space and the like existing in the existing automatic equipment for carrying out vision detection on the PCB, and can effectively reduce the size of the equipment under the condition of ensuring the compatible size of the equipment, and meanwhile, the precision and the efficiency of the circuit board automatic vision detection are also improved; in the scheme, aiming at products with partial colors and difficult positioning, the lower polishing mechanism 6 is customized and added to polish the products, so that the detection and positioning characteristics of the products are more obvious and clear during detection, and the products can be detected more accurately during detection; aiming at large-size products which are partially detected by Tray loading, a product supporting mechanism 5 is customized and added, so that inaccurate detection caused by the sag of the Tray due to the gravity in the process of detecting the products in the Tray is effectively improved; aiming at the limitation of the equipment size due to the line body, the layout mode of the Y-axis screw rod 322 and the Y-axis linear slide rail 324 is changed from a common left-right mode to an up-down mode, and the size of the equipment is effectively reduced under the condition of ensuring the compatible size of the equipment.

In the embodiment of the present utility model, in order to ensure reliability and positioning accuracy of product transmission, the belt transmission module 21 includes two sets of transmission brackets 211, a transmission motor 212, and a transmission belt 213 that are disposed in parallel, where the transmission brackets 211 are disposed above the frame 1 along the X direction, the transmission belt 213 is mounted on the transmission brackets 211 through transmission wheels, and an output end of the transmission motor 212 is connected with the transmission belt 213 in a matching manner through the transmission wheels, and the transmission belt is driven by the transmission motor 212 to move; the positioning device 22 is oppositely arranged on the two transmission brackets 211. The two ends of the transmission bracket 211 are also provided with a feeding and discharging sensor 214.

In the embodiment of the present utility model, in order to enable the product transferred to the designated position to be accurately and reliably positioned and clamped, the positioning device 22 includes a clamping cylinder 221 and a clamping plate 222, the clamping plate 222 has a downward-facing clamping surface, the clamping plate 222 is driven by the clamping cylinder 221 to reciprocate in the Z direction to perform linear displacement, and the clamping positioning of the product is formed after the clamping surface is in close contact with the upper surface of the product.

In the embodiment of the present utility model, in order to enable the product conveying mechanism 2 to adapt to products with different size ranges, the product conveying mechanism 2 is provided with a width adjusting device 23, the width adjusting device 23 includes a width adjusting screw rod 231, a width adjusting motor 232, and a width adjusting belt 233, the two width adjusting screw rods 231 respectively pass through two ends of one of the conveying brackets 211 along the Y direction, the width adjusting belts 233 are assembled at the same end of the two width adjusting screw rods 231, the width adjusting motor 232 drives the width adjusting belts 233 to move, and the width adjusting belts 233 drive the width adjusting screw rod 231 to rotate and then adjust the width distance between the two conveying brackets 211 along the Y direction. The corresponding width can be selected along with the size specification of the product, the product width and size diversity can be adapted, various belt lines do not need to be customized again corresponding to products with different sizes, and the cost is saved.

In the embodiment of the utility model, in order to prevent the product supporting mechanism 5 from damaging the product itself when supporting the product, and ensure the supporting in place, and avoid the decrease of the detection accuracy, the product supporting mechanism 5 further comprises a limiting seat 53, a limiting block 54, and linear bearing rails 55, wherein the linear bearing rails 55 are fixed on two sides of the lower end surface of the supporting platform 52, and the linear bearing rails 55 provide guidance for the reciprocating linear motion of the supporting platform 52 along the Z direction; the stopper 54 is disposed at two ends of the support platform 52, the stopper 54 is L-shaped, the stopper 54 has an upward-facing stopper surface 541, the stopper seat 53 is provided with a downward-facing abutment 531 corresponding to the stopper surface 541, and the stopper surface 541 abuts against the abutment 531 to limit upward displacement of the support platform 52.

In the embodiment of the present utility model, in order to improve the polishing stability and polishing effect of the lower polishing mechanism 6 and make the detection and positioning characteristics of the product more clear during detection, the lower polishing mechanism 6 includes a light source fixing frame 61 and a strip-shaped light source 62, the light source fixing frame 61 is fixedly mounted on the frame 1, and the length direction of the strip-shaped light source 62 extends along the X direction.

The operation process of the circuit board safety high-precision automatic vision detection equipment in the embodiment of the utility model is referred to as follows:

1. after the products are fed to a positioning position through the product conveying mechanism 2 and clamped through the positioning device 22, the product supporting mechanism 5 of the Tray slowly ascends to support the Tray;

2. x, Y axis movement module 32 drives upper polishing mechanism and image capturing mechanism 4 to capture images, and lower polishing mechanism 6 polishes the product while capturing images, so that the image capturing of the product is more convenient to judge, and the state of the product is detected by a visual detection system to judge;

3. after the detection is finished, the product supporting mechanism 5 moves downwards to leave the product, the OK product is loosened by the product conveying mechanism 2 and the positioning device 22 is conveyed to the next process by the conveying mechanism for production;

4. the defective products are sent to the next working procedure for production after being identified by personnel for processing the defective products in a re-judging way and alarming way.

It should be further noted that, in the embodiment of the present utility model, the control of the linear motion module and the like belong to the prior art, and those skilled in the art can know the principle and structure of the linear motion module, and these technologies are not important to the present utility model, so that the description of these parts is not repeated here.

With respect to the above embodiments, the possible variations of the utility model are described as follows:

in the above embodiments, some linear driving mechanisms for driving the relevant components to perform linear reciprocating motion may be one of the following mechanisms:

the piston rod of the air cylinder is used as the acting end of the linear driving mechanism;

the rotor of the linear motor is used as an acting end of the linear driving mechanism;

the control motor is a stepping motor or a servo motor, the screw nut mechanism is a screw pair formed by matching a screw and a nut, the control motor is in transmission connection with the screw, and the nut is used as an acting end of the linear driving mechanism;

the control motor is combined with the belt pulley mechanism, wherein the control motor is a stepping motor or a servo motor, the belt pulley mechanism is matched with a belt pulley to form a linear motion pair, the control motor is connected with the belt through a wheel set, and the belt is used as an acting end of the linear driving mechanism.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (6)

1. The utility model provides a circuit board safety high accuracy automatic vision check out test set, automatic vision check out test set includes frame (1) and installs product transport mechanism (2), motion (3) on frame (1), image capturing mechanism (4), its characterized in that are installed to the location on motion (3):

the product conveying mechanism (2) comprises a belt conveying module (21) and a positioning device (22), the belt conveying module (21) is positioned and installed on the frame (1), a product supporting mechanism (5) is arranged between the belt conveying module (21) and the positioning device (22) on the frame (1), the product supporting mechanism (5) comprises a linear driving unit (51) and a supporting platform (52), the linear driving unit (51) is positioned and installed on the frame (1), the output end of the linear driving unit (51) is upwards connected with the supporting platform (52), and the linear driving unit (51) drives the supporting platform (52) to reciprocate in the Z direction;

the motion mechanism (3) comprises an X-axis motion module (31) and a Y-axis motion module (32) which are arranged on the frame (1); the image capturing mechanism (4) is arranged on the X-axis movement module (31), the X-axis movement module (31) is arranged on the Y-axis movement module (32), and the image capturing mechanism (4) is driven by the X-axis movement module (31) and the Y-axis movement module (32) to move on an X-Y plane; the Y-axis movement module (32) comprises a driving motor (321), a Y-axis screw rod (322), a Y-axis movement block (323) and a Y-axis linear slide rail (324), wherein the Y-axis screw rod (322) is arranged right above the Y-axis linear slide rail (324) in parallel;

an upper polishing mechanism for polishing downwards is arranged on the image capturing mechanism (4), and a lower polishing mechanism (6) for polishing upwards is arranged below a motion path of the image capturing mechanism (4).

2. The circuit board safety high-precision automatic visual inspection device according to claim 1, wherein: the belt transmission module (21) comprises two groups of transmission brackets (211), a transmission motor (212) and a transmission belt (213) which are arranged in parallel, the transmission brackets (211) are arranged above the frame (1) along the X direction, the transmission belt (213) is arranged on the transmission brackets (211) through transmission wheels, the output end of the transmission motor (212) is connected with the transmission belt (213) in a matched manner through the transmission wheels, and the transmission belt is driven by the transmission motor (212) to move; the positioning devices (22) are oppositely arranged on the two transmission brackets (211).

3. The circuit board safety high-precision automatic visual inspection device according to claim 2, wherein: the positioning device (22) comprises a clamping cylinder (221) and a clamping plate (222), the clamping plate (222) is provided with a downward-oriented clamping surface, the clamping cylinder (221) drives the clamping plate (222) to reciprocate in the Z direction to perform linear displacement, and the clamping surface is in close contact with the upper surface of a product to form clamping positioning on the product.

4. The circuit board safety high-precision automatic visual inspection device according to claim 2, wherein: the product conveying mechanism (2) is provided with a width adjusting device (23), the width adjusting device (23) comprises a width adjusting screw rod (231), a width adjusting motor (232) and a width adjusting belt (233), the two width adjusting screw rods (231) respectively penetrate through two ends of one conveying support (211) along the Y direction, the width adjusting belt (233) is assembled at the same end of the two width adjusting screw rods (231), the width adjusting motor (232) drives the width adjusting belt (233) to move, and the width adjusting belt (233) drives the width adjusting screw rod (231) to rotate and then adjust the width distance between the two conveying supports (211) in the Y direction.

5. The circuit board safety high-precision automatic visual inspection device according to claim 1, wherein: the product supporting mechanism (5) further comprises a limiting seat (53), limiting blocks (54) and linear bearing guide rails (55), wherein the linear bearing guide rails (55) are fixed on two sides of the lower end face of the supporting platform (52), and the linear bearing guide rails (55) provide guidance for the reciprocating linear motion of the supporting platform (52) along the Z direction; the limiting blocks (54) are arranged at two ends of the supporting platform (52), the limiting blocks (54) are L-shaped, the limiting blocks (54) are provided with limiting surfaces (541) facing upwards, abutting portions (531) facing downwards are arranged on the limiting seats (53) corresponding to the limiting surfaces (541), and the limiting surfaces (541) abut against the abutting portions (531) to serve as limiting of upward displacement of the supporting platform (52).

6. The circuit board safety high-precision automatic visual inspection device according to claim 1, wherein: the lower lighting mechanism (6) comprises a light source fixing frame (61) and a strip-shaped light source (62), wherein the light source fixing frame (61) is fixedly arranged on the frame (1), and the length direction of the strip-shaped light source (62) extends along the X direction.

Images