Feeding conveying device, precision line body and appearance detection equipment

Abstract

The utility model discloses a kind of feeding conveying device, precision line body and appearance detection equipment, it is related to circuit board appearance detection technical field.The feeding conveying device includes conveying frame, first conveying belt assembly and dust sticking component, first conveying belt assembly and dust sticking component are installed in conveying frame, first conveying belt assembly includes drive unit and conveying belt, drive unit is used to drive conveying belt movement, to make conveying belt can be along the first direction PCB board is conveyed, dust sticking component is used to clean the positive and negative two surfaces of PCB board.The feeding conveying device is through dust sticking component continuously cleaning the pollutant on the positive and negative two surfaces of PCB board, effectively avoid PCB board in conveying process is secondly contaminated, while eliminating interference signal when optical detection, with the advantage of guaranteeing PCB board cleanliness and detection accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of circuit board appearance inspection technology, and particularly relates to a feeding and conveying device, a precision line and appearance inspection equipment. Background Technology

[0002] In visual inspection equipment, existing feeding and conveying devices and conveyor belts tend to accumulate dust, oil, and other contaminants on their conveyor surfaces during long-term operation. These contaminants adhere directly to the PCB board surface, contaminating the PCB board to be inspected and affecting the quality of subsequent processing steps. Furthermore, they can generate interference signals during optical inspection, causing the inspection system to misjudge the results. Summary of the Invention

[0003] The technical problem to be solved by this utility model is: to address the issue that dust, oil and other contaminants easily accumulate on the conveying surface of existing feeding and conveying devices and adhere to the PCB board surface, and to provide a feeding and conveying device, a precision production line and appearance inspection equipment.

[0004] To address the aforementioned issues, this utility model provides a material feeding and conveying device, comprising a conveyor frame, a first conveyor belt assembly, and a dust-adhesive assembly. Both the first conveyor belt assembly and the dust-adhesive assembly are mounted on the conveyor frame. The first conveyor belt assembly includes a drive unit and a conveyor belt. The drive unit drives the conveyor belt to move, enabling the conveyor belt to transport PCB boards along a first direction. The dust-adhesive assembly cleans both the front and back surfaces of the PCB board.

[0005] As a further improvement to the above technical solution: Furthermore, the dust-adhesion assembly includes a dust-adhesion bracket, an upper dust-adhesion roller, an upper dust-adhesion paper roller, a lower dust-adhesion roller, and a lower dust-adhesion paper roller. The dust-adhesion bracket is installed on the conveyor frame. The upper dust-adhesion paper roller, the upper dust-adhesion roller, the lower dust-adhesion roller, and the lower dust-adhesion paper roller are all rotatably mounted on the dust-adhesion bracket. The upper dust-adhesion paper roller, the upper dust-adhesion roller, the lower dust-adhesion roller, and the lower dust-adhesion paper roller are arranged in parallel from top to bottom. The upper dust-adhesion roller is used to perform dust-adhesion operations on the upper surface of the PCB board, and the upper dust-adhesion paper roller is used to pick up the dust on the upper dust-adhesion roller. The lower dust-adhesion roller is used to perform dust-adhesion operations on the lower surface of the PCB board, and the lower dust-adhesion paper roller is used to pick up the dust on the lower dust-adhesion roller.

[0006] Furthermore, the drive unit includes a rotary drive component, a first rotating shaft, and a second rotating shaft. The first conveyor belt assembly also includes a support plate. The first rotating shaft and the second rotating shaft are rotatably mounted on the conveyor frame, and the first rotating shaft and the second rotating shaft are spaced apart along the first direction. The conveyor belt is sleeved on the first rotating shaft and the second rotating shaft. The rotary drive component and the support plate are both mounted on the conveyor frame. The rotary drive component is used to drive the first rotating shaft and / or the second rotating shaft to rotate, and the support plate is located between the upper conveyor belt and the lower conveyor belt, and the support plate is used to support the upper conveyor belt.

[0007] Furthermore, the support plate is provided with ventilation holes that penetrate the upper and lower surfaces of the support plate.

[0008] Furthermore, the first conveyor belt assembly also includes a cleaning component, which is mounted on the conveyor frame and is used to clean the conveying surface of the conveyor belt.

[0009] On the other hand, this application also proposes a precision production line, including the feeding and conveying device as described above. The precision production line further includes a second conveyor belt assembly, a first sensing assembly, and a first blocking assembly. The second conveyor belt assembly, the first blocking assembly, and the first sensing assembly are all mounted on the conveyor frame. The second conveyor belt assembly is used to convey the PCB board along the first direction. The first sensing assembly is used to sense the PCB board conveyed by the second conveyor belt assembly. The first blocking assembly is used to block or allow the PCB board conveyed by the second conveyor belt assembly to pass.

[0010] As a further improvement to the above technical solution: Furthermore, the first sensing component includes a first sensing support frame and a first sensor. The first sensing support frame is mounted on the conveyor frame, and the first sensor is mounted on the first sensing support frame. The first sensor is used to sense the PCB board conveyed by the second conveyor belt assembly.

[0011] Furthermore, the first material blocking assembly includes a first material blocking support frame, a first material blocking drive component, and a first material blocking plate. The first material blocking support frame is installed on the conveyor frame, the first material blocking drive component is installed on the first material blocking support frame, and the first material blocking plate is installed at the output end of the first material blocking drive component. Furthermore, the first baffle drive is used to drive the first baffle plate to rotate, so that the first baffle plate switches between a first position and a second position; When the first baffle is in the first position, it can block the PCB board so that the PCB board is in the first inspection process; when the first baffle is in the second position, it can release the PCB board.

[0012] Furthermore, the precision production line also includes a second sensing component and a second blocking component. Both the second blocking component and the second sensing component are mounted on the conveyor frame. The second sensing component is used to sense the PCB board conveyed by the second conveyor belt assembly, and the second blocking component is used to block or allow the PCB board conveyed by the second conveyor belt assembly to pass.

[0013] Furthermore, the second material blocking assembly includes a second material blocking support frame, a second material blocking drive component, and a second material blocking plate. The second material blocking support frame is installed on the conveyor frame, the second material blocking drive component is installed on the second material blocking support frame, and the second material blocking plate is installed at the output end of the second material blocking drive component. The second baffle drive is used to drive the second baffle plate to rotate, so that the second baffle plate switches between the third position and the fourth position; When the second baffle is in the third position, the baffle can block the PCB board so that the PCB board is in the second inspection process; when the second baffle is in the fourth position, the second baffle can release the PCB board.

[0014] Furthermore, the precision production line also includes a third conveyor belt assembly and a backlight assembly. The third conveyor belt assembly and the backlight assembly are both mounted on the conveyor frame, and the first conveyor belt assembly, the second conveyor belt assembly, and the third conveyor belt assembly are spaced apart along the first direction. The backlight assembly is located between the second conveyor belt assembly and the third conveyor belt assembly. The backlight assembly is used to illuminate the PCB board so that the defects in the inner wall of the holes of the PCB board can be captured by the camera.

[0015] Furthermore, the conveyor frame is provided with a mounting groove at the bottom between the second conveyor belt assembly and the third conveyor belt assembly, and the backlight assembly is disposed in the mounting groove, and the illumination light emitted by the backlight assembly can be emitted from the groove opening of the mounting groove.

[0016] Furthermore, the precision production line also includes a belt clamp, and the conveyor frame is provided with a mounting part. The belt clamp is installed in the mounting part to limit the conveyor belt movement of the second conveyor belt assembly and / or the third conveyor belt assembly.

[0017] In another aspect, this application also proposes an appearance inspection device, including a frame, an inspection camera, and a precision line as described above, wherein the precision line and the inspection camera are housed within the frame, and the inspection camera is used to perform appearance inspection on the PCB board within the precision line.

[0018] As can be seen from the above, the feeding and conveying device, compact production line, and appearance inspection equipment provided in this application have at least the following advantages compared with the prior art: The feeding and conveying device includes a conveyor frame, a first conveyor belt assembly, and a dust-adhesive assembly. Both the first conveyor belt assembly and the dust-adhesive assembly are installed on the conveyor frame. The conveyor belt of the first conveyor belt assembly conveys the PCB board, and the dust-adhesive assembly cleans both the front and back surfaces of the PCB board, thereby preventing dust, oil, and other contaminants on the conveyor belt of the first conveyor belt assembly from adhering to the surface of the PCB board. This avoids interference signals during optical inspection, preventing misjudgment by the inspection system, and ensuring the cleanliness and inspection accuracy of the PCB board. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the feeding and conveying device provided in one embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the feeding and conveying device provided in one embodiment of the present invention. Figure 2 ; Figure 3 An explosion of the feeding and conveying device provided in one embodiment of this utility model. Figure 1 ; Figure 4 An explosion of the feeding and conveying device provided in one embodiment of this utility model. Figure 2 .

[0021] The reference numerals in the accompanying drawings are as follows: 100 - Feeding and conveying device; 110 - Conveyor frame; 120 - First conveyor belt assembly; 121 - Rotary drive component; 122 - First rotating shaft; 123 - Second rotating shaft; 124 - Conveyor belt; 125 - Support plate; 126 - Belt pressure block; 130 - Cleaning component; 131 - Cleaning bracket; 132 - Cleaning brush; 140 - Dust-adhesive component; 141 - Dust-adhesive bracket; 142 - Upper dust-adhesive roller; 143 - Upper dust-adhesive paper roller; 144 - Lower dust-adhesive roller; 145 - Lower dust-adhesive paper roller; 150 - Second conveyor belt assembly; 160 - Sensing component; 161 - Sensing support frame; 162 - Sensor; 170 - Material blocking component; 171 - Material blocking support frame; 172 - Material blocking drive component; 173 - Material blocking plate; 180 - Third conveyor belt assembly; 190 - Backlight component. Detailed Implementation

[0022] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] In existing technologies, visual inspection machines use computer vision technology to detect defects in PCB boards, with high-precision image acquisition and analysis being the core technology. Traditional material conveying devices use conveyor belts to transport PCB boards. Over long-term operation, dust, oil, and other contaminants easily accumulate on the surface of the conveyor belts. When a PCB board comes into contact with the contaminated belt, the contaminants adhere to the board surface, causing abnormal shadows or reflections in the image acquisition area, directly affecting the accuracy of the defect recognition algorithm. This type of misjudgment is particularly prominent in high-speed continuous production scenarios, severely restricting inspection efficiency and reliability.

[0026] To address the aforementioned issues, researchers discovered that contaminant residue on the conveyor belt surface is the root cause of secondary contamination of PCB boards. Traditional solutions involve periodic manual cleaning during shutdowns, but this cannot achieve real-time cleaning during continuous production. After numerous trials and verifications, integrating an automatic cleaning module inside the conveyor frame became a feasible approach. This application designs a dust-adhesive component 140 that can continuously remove impurities from both the front and back surfaces of the PCB board during transport, avoiding the impact of downtime maintenance on production efficiency.

[0027] Therefore, please refer to Figures 1 to 4 This application proposes a feeding and conveying device 100 including a conveyor frame 110, a first conveyor belt assembly 120, and a dust-adhesive assembly 140. Both the first conveyor belt assembly 120 and the dust-adhesive assembly 140 are mounted on the conveyor frame 110. The first conveyor belt assembly 120 includes a drive unit and a conveyor belt 124. The drive unit drives the conveyor belt 124 to move, enabling the conveyor belt 124 to transport PCB boards along a first direction. The dust-adhesive assembly 140 is used to clean both the front and back surfaces of the PCB board.

[0028] The conveyor frame 110 refers to the rigid frame structure that supports the conveying system. It can be constructed using welded steel structures or spliced ​​aluminum alloy profiles, providing a stable installation foundation for the conveyor belt 124 assembly. The first conveyor belt assembly 120 refers to a material transfer unit containing a closed-loop transmission structure. It can be implemented by using a drive motor to drive the conveyor belt to rotate, thereby driving the directional movement of the PCB board.

[0029] Specifically, a horizontal mounting platform is provided inside the conveyor frame 110. The drive roller and driven roller of the first conveyor belt assembly 120 are fixed to both ends of the frame, forming a closed-loop conveying path. The dust-adhesive assembly 140 is located at the output end of the conveying direction of the first conveyor belt assembly 120. The conveyor belt 124 of the first conveyor belt assembly 120 conveys the PCB board to the dust-adhesive assembly 140, which cleans both the front and back surfaces of the PCB board.

[0030] Both the first conveyor belt assembly 120 and the dust removal assembly 140 are installed on the conveyor frame 110. The conveyor belt of the first conveyor belt assembly 120 transports the PCB board, and the dust removal assembly 140 cleans the front and back surfaces of the PCB board, thereby preventing dust, oil and other contaminants on the conveyor belt of the first conveyor belt assembly 120 from adhering to the surface of the PCB board. This avoids interference signals during optical inspection, preventing misjudgment by the inspection system, and ensuring the cleanliness of the PCB board and the accuracy of the inspection.

[0031] Please see Figures 1 to 4 This application further proposes a feeding and conveying device 100, in which a dust-adhesive assembly 140 includes a dust-adhesive bracket 141, an upper dust-adhesive roller 142, an upper dust-adhesive paper roller 143, a lower dust-adhesive roller 144, and a lower dust-adhesive paper roller 145. The dust-adhesive bracket 141 is mounted on the conveyor frame 110. The upper dust-adhesive paper roller 143, the upper dust-adhesive roller 142, the lower dust-adhesive roller 144, and the lower dust-adhesive paper roller 145 are all rotatably mounted on the dust-adhesive bracket 141. The upper dust-adhesive paper roller 143, the upper dust-adhesive roller 142, the lower dust-adhesive roller 144, and the lower dust-adhesive paper roller 145 are arranged in parallel from top to bottom. The upper dust-adhesive roller 142 is used to perform dust-adhesive operations on the upper surface of the PCB board, and the upper dust-adhesive paper roller 143 is used to pick up the dust on the upper dust-adhesive roller 142. The lower dust-adhesive roller 144 is used to perform dust-adhesive operations on the lower surface of the PCB board, and the lower dust-adhesive paper roller 145 is used to pick up the dust on the lower dust-adhesive roller 144.

[0032] The adhesive support 141 is a supporting structure for supporting the adhesive assembly 140. It can be formed by welding a metal frame, and its bottom is bolted to the side wall of the conveyor frame 110, providing an installation base for the adhesive roller. The upper adhesive roller 142 is a cylinder covered with an adhesive material, which can be a rubber roller wrapped with an adhesive film. It adsorbs residual particles by rotating and contacting the upper surface of the PCB board. The upper adhesive paper roller 143 is a winding mechanism for the adhesive paper, which can be a spring-tensioned paper roll. The roller surface contaminants are removed by periodically changing the paper roll. The lower adhesive roller 144 is symmetrical to the upper adhesive roller 142 but installed in the opposite direction, used to simultaneously treat contaminants on the lower surface of the PCB board. The lower adhesive paper roller 145 has the same function as the upper adhesive paper roller 143, and its automatic cleaning is achieved through an independent winding system.

[0033] Specifically, the dust-adhesive brackets 141 are arranged vertically on both sides of the conveyor frame 110 along the conveying direction, and the four sets of rollers are coaxially mounted through bearing seats. When the PCB board passes by, the upper dust-adhesive roller 142 and the lower dust-adhesive roller 144 respectively adhere dust particles from the upper and lower surfaces of the board surface in a contact-type rotational manner. The dust-adhesive paper roller rotates synchronously with the corresponding dust-adhesive roller through friction drive, such as using gear meshing or belt drive, so that the dust-adhesive paper continuously wraps the surface of the dust-adhesive roller, transferring the adsorbed contaminants to the paper roll. The support plate 125 can be provided with an opening structure, such as a rectangular through hole in the area of ​​the corresponding lower dust-adhesive roller 144, to avoid interfering with the working space of the lower dust-adhesive roller 144.

[0034] Compared with existing technologies, traditional devices only use single-sided cleaning or blowing methods, which cannot simultaneously treat contaminants on both sides of the PCB board, and the cleaning component 130 lacks a self-cleaning function, resulting in reduced efficiency. This solution, through the coordinated layout of upper and lower dual adhesive rollers and matching paper rollers, completes double-sided cleaning simultaneously during a single conveying process. At the same time, it utilizes the continuous winding characteristics of the adhesive paper rollers to achieve real-time purification of the working surface of the adhesive rollers, avoiding frequent manual cleaning.

[0035] Through the above technical solution, this application effectively solves the problem of secondary contamination of the upper and lower surfaces of the PCB board during the transportation process. It directly removes the attached particles through contact dust removal operation, and the automatic dust removal paper roller maintains the continuous working capacity of the cleaning component 130, reduces the probability of misjudgment in appearance inspection caused by surface contaminants, and reduces the frequency of equipment downtime maintenance.

[0036] Please see Figures 3 to 4 This application further proposes that the drive unit includes a rotary drive 121, a first rotating shaft 122, and a second rotating shaft 123. The first conveyor belt assembly 120 also includes a support plate 125. The first rotating shaft 122 and the second rotating shaft 123 are rotatably mounted on the conveyor frame 110, and the first rotating shaft 122 and the second rotating shaft 123 are spaced apart along a first direction. The conveyor belt 124 is sleeved on the first rotating shaft 122 and the second rotating shaft 123. The rotary drive 121 and the support plate 125 are both mounted on the conveyor frame 110. The rotary drive 121 is used to drive the first rotating shaft 122 or the second rotating shaft 123 to rotate, and the support plate 125 is located between the upper conveyor belt 124 and the lower conveyor belt 124. The support plate 125 is used to support the upper conveyor belt 124.

[0037] The support plate 125 is a flat plate structure set between the upper and lower conveyor belts 124. It can be made of aluminum alloy or engineering plastic and its function is to prevent the upper conveyor belt 124 from sagging due to gravity, thus preventing deformation of the conveyor surface. The rotary drive component 121 is the power source that drives the rotating shaft. It can be a servo motor or a stepper motor, connected to the rotating shaft via a coupling to achieve precise speed control. The belt pressure block 126 is an adjustable height limiting component. It can be a metal block with a threaded adjustment mechanism, used to maintain the surface of the conveyor belt 124 at a constant height.

[0038] Specifically, when the rotary drive 121 drives the first rotating shaft 122 or the second rotating shaft 123 to rotate, the conveyor belt 124 circulates under the drive of the rotating shaft. The support plate 125 is fixed in the middle area of ​​the conveyor frame 110, and its plane contacts the lower surface of the upper conveyor belt 124 to form a continuous support surface to counteract the deformation caused by the weight of the belt. During the continuous operation of the conveyor belt 124, the support plate 125 maintains the flatness of the conveyor surface through rigid support, avoiding frictional contamination between the PCB board and the belt contact surface due to belt collapse.

[0039] Compared to existing technologies, traditional conveyor systems lack support plates 125, leading to belt sagging in the middle section and localized friction and contaminant accumulation at the PCB board-belt contact surface. This solution addresses this by adding support plates 125 to create rigid support throughout the entire conveyor, eliminating frictional contamination caused by belt deformation. Ventilation holes in the support plates 125 accelerate airflow and reduce the accumulation of electrostatically adsorbed dust. The modular design of the belt clamps 126 makes belt height adjustment more convenient and facilitates maintenance and replacement compared to traditional integral frame structures.

[0040] This application further proposes that the support plate 125 has ventilation holes that penetrate the upper and lower surfaces of the support plate 125.

[0041] Among them, the support plate 125 refers to the support structure located between the upper conveyor belt 124 and the lower conveyor belt 124. Specifically, it can be made of metal plate or engineering plastic plate. Its function is to provide support for the conveyor belt 124 and maintain the stability of the belt running trajectory.

[0042] Among them, the ventilation holes refer to the through holes that penetrate the upper and lower surfaces of the support plate 125. Specifically, they can be circular holes, strip holes, or mesh holes. Their function is to reduce dust accumulation in the contact area between the support plate 125 and the conveyor belt 124 by promoting airflow.

[0043] Specifically, during the process of supporting the upper conveyor belt 124, the vents in the support plate 125 allow air to flow between the belt and the support plate 125. This flow can carry away the heat generated by the friction of the belt operation, reducing electrostatic adsorption caused by temperature rise, thereby reducing dust adhesion on the belt surface. At the same time, the airflow path formed by the vents can blow away particles remaining on the surface of the support plate 125 from the belt contact area, preventing contaminants from being transferred to the belt surface after repeated friction between the belt and the support plate. The vents can also prevent air gaps from being generated during the relative movement of the belt and the support plate, which would affect the transport stability of the PCB board, further improving the movement accuracy of the PCB on the production line.

[0044] Compared to existing technologies, the traditional support plate 125 has a closed structure, which easily creates a confined space in the contact area between the belt and the plate, leading to heat accumulation and dust retention. This solution breaks up the confined space with ventilation holes, actively expelling contaminants through airflow and improving the cleanliness of the belt surface. It also enhances the transport stability of the PCB board.

[0045] Through the above technical solution, this application can reduce the problem of secondary surface contamination caused by contamination of the support pallet 125 area during the operation of the conveyor belt 124, thereby reducing the probability of PCB board being contaminated during the conveying process and avoiding misjudgment of appearance inspection caused by contaminant interference. At the same time, it improves the transportation stability of PCB board.

[0046] Please see Figures 1 to 4 This application further proposes that it also includes a cleaning component 130, which is mounted on the conveyor frame 110 and is used to clean the conveyor surface of the conveyor belt 124.

[0047] The cleaning component 130 refers to a contaminant removal device that comes into contact with the conveyor surface of the conveyor belt. Specifically, it can be achieved by using a compressed air blowing device, a rotating cleaning roller, or a fiber brush to remove the contaminants adhering to the surface of the conveyor belt 124 through physical contact or airflow impact.

[0048] The cleaning component 130 is mounted above or to the side of the conveyor belt via an adjustable bracket, with its working end maintaining a preset contact pressure or distance from the conveyor belt surface. When the drive motor rotates the conveyor belt 124, the cleaning component 130's blowing airflow, rotating rollers, or brush fibers simultaneously act on the belt surface, removing contaminants such as solder debris and flux residue accumulated during production in real time. This structural design ensures that cleaning operations are synchronized with material conveying, avoiding production line interruptions caused by traditional manual cleaning.

[0049] Compared to existing technologies, traditional conveying devices lack integrated cleaning structures, requiring regular manual cleaning and resulting in efficiency losses. This solution integrates a cleaning module into the conveying system to achieve dynamic maintenance of the conveying surfaces. Compared to external cleaning equipment, this integrated design saves equipment floor space, eliminates the time lag between additional cleaning processes and the main conveyor line, and ensures that the conveying surfaces in contact with each PCB board are always clean.

[0050] Through the above technical solution, this application effectively blocks the transfer path of contaminants from the conveyor belt 124 to the PCB board, eliminating image acquisition errors caused by board surface contamination. The continuous operation of the cleaning component 130 maintains the cleanliness of the conveyor surface, enabling the vision inspection system to accurately identify real defects and significantly reduce the false judgment rate. This technical solution achieves the self-cleaning function of the conveyor system during the production process without changing the original conveying rhythm.

[0051] This application further proposes a feeding and conveying device 100, whose cleaning component 130 includes a cleaning bracket 131 and a blowing component. The cleaning bracket 131 is installed on the conveyor frame 110, and the blowing component is installed on the cleaning bracket 131. The blowing component is used to blow the conveying surface of the first conveyor belt assembly 120.

[0052] Among them, the cleaning bracket 131 refers to the support structure used to fix the blowing component. Specifically, it can be implemented by a metal frame or an adjustable height mounting base. It is fixed to the conveyor frame 110 by bolt connection to ensure that the blowing component and the conveyor belt 124 maintain a stable relative position.

[0053] Among them, the purging component refers to the device that removes foreign objects through airflow. Specifically, it can be implemented by compressed air nozzles or centrifugal fans. It uses directional airflow to peel off contaminants such as dust and debris attached to the surface of the conveyor belt 124, preventing contaminants from being transferred to the PCB board surface during the conveying process.

[0054] Specifically, cleaning supports 131 are installed on both sides of the conveyor frame 110. The blowing component is fixed to the cleaning support 131 via an adjustable mounting base, with its outlet facing the upper surface of the conveyor belt 124. When the conveyor belt 124 rotates, the blowing component continuously generates a high-speed airflow, which covers the running trajectory of the belt surface, blowing away particles deposited on the belt surface. The blowing angle can be adjusted according to the belt speed; for example, the airflow direction can be changed by rotating the mounting base to cover the full width of the belt. The blowing pressure can be controlled by a valve to adapt to cleaning needs with different levels of contamination.

[0055] Compared to existing technologies, traditional cleaning methods often use contact brushes or adhesive rollers, which pose a risk of secondary contamination due to wear and tear on the cleaning components. This solution employs non-contact airflow cleaning, avoiding physical contact that could damage the belt surface. Simultaneously, the airflow can penetrate belt gaps to remove hidden contaminants, significantly improving cleaning efficiency.

[0056] Through the above technical solution, this application achieves dynamic cleaning of the surface of the conveyor belt 124, effectively preventing contaminants from adhering to the PCB board during the conveying process, thereby reducing the risk of misjudgment in appearance inspection caused by surface contamination and improving the accuracy of inspection results.

[0057] This application further proposes a feeding and conveying device 100, including a conveyor frame 110, a first conveyor belt assembly 120, and a cleaning assembly 130. The first conveyor belt assembly 120 and the cleaning assembly 130 are both mounted on the conveyor frame 110. The first conveyor belt assembly 120 is used to convey PCB boards along a first direction. The cleaning assembly 130 includes a cleaning bracket 131 and a cleaning roller. The cleaning bracket 131 is mounted on the conveyor frame 110, and the cleaning roller is mounted on the cleaning bracket 131. The cleaning roller is used to clean the conveying surface of the first conveyor belt assembly 120.

[0058] The cleaning bracket 131 refers to the support structure used to fix the cleaning roller. It can be made of metal frame or engineering plastic and is fixed to the conveyor frame 110 by bolt connection or snap-fit ​​structure. This bracket provides a stable mounting base for the cleaning roller and ensures that it does not shift during the cleaning operation.

[0059] The cleaning roller is a rotating component with a cylindrical structure, which can be implemented using a metal shaft core covered with an elastic material, such as a rubber layer or a nylon bristle layer. This roller contacts the surface of the conveyor belt 124 through rotational motion, using friction to remove contaminants adhering to the belt surface.

[0060] Specifically, the cleaning roller is configured to maintain contact with the conveying surface of the first conveyor belt assembly 120. When the conveyor belt 124 rotates, the cleaning roller is driven to rotate by the belt friction, creating rolling friction between its surface material and the belt. During this process, particles, oil stains, or fiber debris adhering to the belt surface are adsorbed or scraped off by the cleaning roller. The rotation direction of the cleaning roller can be the same as or opposite to the belt's running direction, depending on the type of contaminant. The cleaning bracket 131 supporting the cleaning roller is designed with an adjustable height to facilitate adjustment of the contact pressure according to the degree of belt wear.

[0061] Compared to existing technologies, traditional solutions often use blowing or adhesive methods to treat contaminants on conveyor belt surfaces, but these methods suffer from problems such as secondary dust re-entrainment due to airflow disturbance and frequent replacement of adhesive materials. This solution, through a mechanical contact cleaning structure, can directly remove stubborn contaminants without consuming compressed air or adhesive media, making it particularly suitable for scenarios involving mixed contamination of oil and solid particles.

[0062] Through the above technical solution, this application achieves continuous physical removal of contaminants from the surface of the conveyor belt 124, effectively preventing contaminants from transferring to the PCB board surface during transportation. This cleaning method avoids dust diffusion caused by airflow disturbance, while reducing equipment operating energy consumption and maintenance frequency, thereby reducing misjudgments in appearance inspection caused by belt contamination.

[0063] Please see Figure 1 , Figure 3 as well as Figure 4 This application further proposes a cleaning component 130 including a cleaning bracket 131 and a cleaning brush 132. The cleaning bracket 131 is mounted on the conveyor frame 110, and the cleaning brush 132 is mounted on the cleaning bracket 131. The cleaning brush 132 is used to clean the conveying surface of the first conveyor belt assembly 120.

[0064] The cleaning bracket 131 refers to the support structure used to fix the cleaning brush 132. Specifically, it can be implemented using a metal frame or a plastic bracket, and its function is to provide a stable installation base for the cleaning brush 132.

[0065] Among them, the cleaning brush 132 refers to a cleaning component made of flexible bristles, which can be made of nylon or animal hair. Its function is to remove contaminants attached to the conveying surface through physical contact.

[0066] Specifically, the cleaning bracket 131 is fixed on both sides of the conveyor frame 110, and the cleaning brush 132 is detachably installed at a preset position on the cleaning bracket 131, so that its bristles remain in contact with the conveying surface of the first conveyor belt assembly 120. When the conveyor belt 124 is running, the cleaning brush 132 continuously cleans the conveying surface it passes through, removing dust, debris and other contaminants attached to the belt, thereby preventing contaminants from being transferred to the PCB board surface.

[0067] Compared to existing technologies, which often employ blowing or sticky rollers for cleaning, blowing may not completely remove highly adhesive contaminants, while sticky rollers require frequent replacement of consumables. This solution directly removes contaminants through mechanical sweeping, avoiding secondary pollution that may be caused by airflow disturbances, reducing maintenance frequency, and improving the continuity and reliability of cleaning operations.

[0068] Through the above technical solution, this application can effectively remove contaminants from the surface of the conveyor belt 124, avoid secondary contamination of the PCB board due to contact with contaminated surfaces during the conveying process, and reduce misjudgment caused by foreign object interference during appearance inspection.

[0069] Please see Figures 1 to 4 This application further proposes a precision production line, including the feeding and conveying device 100 provided in the above embodiments, and also including a second conveyor belt assembly 150, a sensing component 160 and a blocking component 170. The second conveyor belt assembly 150, the blocking component 170 and the sensing component 160 are all installed on the conveyor frame 110. The second conveyor belt assembly 150 is used to convey PCB boards along a first direction, the sensing component 160 is used to sense the PCB boards conveyed by the second conveyor belt assembly 150, and the blocking component 170 is used to block or allow the PCB boards conveyed by the second conveyor belt assembly 150 to pass.

[0070] The second conveyor belt assembly 150 is an independent conveying unit arranged along the first direction, which can be implemented using a belt drive mechanism. It is used to form segmented conveying areas on the conveyor frame 110, allowing the PCB boards to be transferred in an orderly manner between different workstations. The sensing assembly 160 is a device for detecting the position of the PCB board, which can be implemented using a photoelectric sensor or a proximity switch. It triggers subsequent control actions by monitoring the arrival position of the PCB board in real time. The baffle assembly 170 is a mechanism for controlling the flow of the PCB board, which can be implemented using a cylinder-driven baffle. It adjusts the dwell time of the PCB board on the conveying path through mechanical blocking or releasing actions.

[0071] Specifically, the second conveyor belt assembly 150 and the first conveyor belt assembly 120 form a series structure. After the PCB board completes its initial cleaning, it enters the conveying area of ​​the second conveyor belt assembly 150. For smaller PCB boards, the sensing component 160 continuously monitors the PCB board's movement position. When the PCB board reaches the predetermined station, it sends a signal to the blocking component 170. The blocking component 170 drives the baffle to rise according to the signal, forming a physical barrier that keeps the PCB board at the inspection station. After the inspection is completed, the blocking component 170 drives the baffle to fall, releasing the barrier and allowing the PCB board to continue to be conveyed to the next station.

[0072] In some specific embodiments, the conveying speed of the second conveyor belt assembly 150 can be set lower than that of the first conveyor belt assembly 120. For example, by adjusting the speed parameters of the drive motor, the moving speed of the PCB board in the second conveying area can be slowed down, making it easier for the sensing component 160 to accurately capture the position signal. The working surface of the baffle plate 173 can cover more than two-thirds of the width of the conveyor belt 124 to ensure the effectiveness of the blocking action.

[0073] Compared to existing technologies, traditional conveyor systems use a single belt for continuous transport, which cannot precisely control the dwell time of PCB boards at the inspection station and is prone to missed inspections due to excessive movement speed. This solution, by adding a segmented conveyor structure and coordinating the control of sensing and blocking mechanisms, enables controllable dwell time of PCB boards at critical stations, providing stable operating conditions for the inspection process.

[0074] Through the above technical solution, this application can accurately control the dwell position and time of the PCB board during the conveying process, avoid detection blind spots caused by unstable conveying speed, and reduce mutual interference between different processes by segmented conveying, thereby reducing the risk of misjudgment caused by the diffusion of contaminants on the belt surface.

[0075] Please see Figures 3 to 4 This application further proposes that the sensing component 160 includes a sensing support frame 161 and a sensor 162. The sensing support frame 161 is mounted on the conveyor frame 110, and the sensor 162 is mounted on the sensing support frame 161. The sensor 162 is used to sense the PCB board conveyed by the second conveyor belt assembly.

[0076] Among them, the induction support frame 161 refers to the support structure that carries the sensor 162. Specifically, it can be implemented using a metal frame structure. Its installation position can be adjusted in height and angle according to the conveying path to stabilize and fix the sensor 162.

[0077] Sensor 162 refers to a sensing device for detecting the position of the PCB board. Specifically, it can be implemented using a photoelectric sensor or a proximity switch. It determines whether the PCB board has reached the predetermined position by emitting and receiving light signals or electromagnetic signals.

[0078] Specifically, during the continuous conveying of PCB boards by the second conveyor belt assembly 150, sensor 162 is configured to monitor the status of objects on the conveying path in real time. When a PCB board moves with the conveyor belt 124 to the sensing area, sensor 162 triggers a detection signal through a signal change. This signal can then control the blocking assembly 170 or the cleaning assembly 130 to perform subsequent actions. For example, when a PCB board is detected to have reached a predetermined position, the blocking drive 172 can drive the blocking plate 173 to rise to block subsequent PCB boards, ensuring the accuracy of a single inspection operation.

[0079] Compared to existing technologies, traditional conveying devices lack a real-time monitoring mechanism for the position of PCB boards, resulting in the inability to promptly interrupt the conveying process for cleaning when contaminants adhere. This solution, by adding a sensing component 160, enables the equipment to accurately sense the position of the PCB board and trigger linkage control, avoiding continuous misjudgments caused by surface contamination during conveying.

[0080] Through the above technical solution, this application realizes real-time monitoring of the PCB board position during the conveying process, ensuring that cleaning or interception actions can be triggered in a timely manner when contaminants adhere, effectively reducing the probability of misjudgment in appearance inspection caused by belt contamination.

[0081] Please see Figures 3 to 4 This application further proposes a baffle assembly 170 including a baffle support frame 171, a baffle drive 172, and a baffle plate 173. The baffle support frame 171 is mounted on the conveyor frame 110, the baffle drive 172 is mounted on the baffle support frame 171, and the baffle plate 173 is mounted on the output end of the baffle drive 172. The baffle drive 172 is used to drive the baffle plate 173 to rotate, so that the baffle plate 173 switches between a first position and a second position. When the baffle plate 173 is in the first position, the baffle plate 173 can block the PCB board. When the baffle plate 173 is in the second position, the baffle plate 173 can allow the PCB board to pass through.

[0082] When sensor 162 detects the PCB board, the baffle drive 172 drives the baffle plate 173 to rotate so that the baffle plate 173 is in the first position and can block the PCB board; after the previous PCB board has been detected, the baffle drive 172 drives the baffle plate 173 to rotate so that the baffle plate 173 is in the second position and can release the PCB board.

[0083] Multiple sets of sensing components 160 and blocking components 170 can be set as needed. In this embodiment, a first sensing component, a first blocking component, a second sensing component, and a second blocking component are provided at intervals along the conveying direction of the second conveyor belt assembly 150. When the first blocking plate is in the first position, the first blocking plate can block the PCB board so that the PCB board is in the first inspection process; when the first blocking plate is in the second position, the first blocking plate can release the PCB board; when the second blocking plate is in the third position, the blocking plate can block the PCB board so that the PCB board is in the second inspection process; when the second blocking plate is in the fourth position, the second blocking plate can release the PCB board.

[0084] Please see Figures 1 to 4 This application further proposes that the precision production line also includes a third conveyor belt assembly 180 and a backlight assembly 190. The third conveyor belt assembly 180 and the backlight assembly 190 are both mounted on the conveyor frame 110, and the first conveyor belt assembly 120, the second conveyor belt assembly 150 and the third conveyor belt assembly 180 are spaced apart along a first direction. The backlight assembly 190 is located between the second conveyor belt assembly 150 and the third conveyor belt assembly 180. The backlight assembly 190 is used to illuminate the PCB board so that defects in the inner wall of the holes of the PCB board can be captured by the camera.

[0085] When the precision line transports the PCB board to the position of the backlight assembly 190, the backlight assembly 190 is used to illuminate the PCB board, so that defects in the inner wall of the PCB holes can also be captured by the camera of the appearance inspection equipment, improving the accuracy of inspection and reducing the operation of manual re-inspection.

[0086] The bottom of the conveyor frame 110, located between the second conveyor belt assembly 150 and the third conveyor belt assembly 180, is provided with a mounting groove. The backlight assembly 190 is disposed in the mounting groove, and the illumination light emitted by the backlight assembly 190 is emitted from the opening of the mounting groove.

[0087] In this embodiment, the first conveyor belt assembly 120, the second conveyor belt assembly 150, and the third conveyor belt assembly 180 have the same structure. The precision line also includes a belt clamp, and the conveyor frame 110 is provided with a mounting part. The belt clamp is installed in the mounting part to limit the movement of the conveyor belts of the second conveyor belt assembly 150 and / or the third conveyor belt assembly 180.

[0088] Please see Figures 3 to 4 This application further proposes that the precision conveyor also includes a belt clamp 126, and the conveyor frame 110 is provided with a mounting part. The belt clamp 126 is installed in the mounting part to limit the conveyor belt movement of the second conveyor belt assembly and / or the third conveyor belt assembly.

[0089] The belt clamp 126 is a rigid component used to restrict the position of the conveyor belt surface. It can be made of aluminum alloy or engineering plastic and can be detachably connected by bolts or clips. Its function is to control the vertical displacement of the conveyor belt through physical constraints, and to prevent changes in the height of the conveyor surface due to belt slack or vibration.

[0090] The detachable installation refers to a non-fixed connection between the component and the frame, which can be achieved through threaded connections, sliding groove fits, or plug-in structures. This design allows for quick disassembly and assembly of the belt pressure block 126 during maintenance or replacement, reducing downtime.

[0091] Specifically, during the operation of the conveyor belt, the belt clamps 126 are fixed at the edges of both sides of the conveyor frame 110, with their top plane maintaining a preset distance from the upper surface of the conveyor belt. When the belt deforms due to load changes or long-term use, the rigid contact surface of the clamps prevents the belt from lifting excessively. The support plate 125 and the belt clamps 126 work together, with the support plate 125 providing bottom support and the belt clamps 126 applying lateral restraint, jointly maintaining the flatness of the conveyor surface. For example, when a PCB board passes over the conveyor belt 124, the belt clamps 126 can limit the local bulging of the belt caused by stress, ensuring smooth movement of the PCB board.

[0092] Compared to existing technologies, traditional conveyor systems typically rely on the belt's own tension to maintain surface flatness, but this can easily lead to loosening or deformation after prolonged use. This solution, by adding a detachable belt clamp 126, not only achieves active control of the belt height but also allows for adjustment of the clamp's position or replacement of its specifications based on belt wear, thus solving the problem of PCB board displacement caused by belt surface height fluctuations.

[0093] Through the above technical solution, this application effectively controls the range of movement of the conveyor belt in the vertical direction, avoids secondary adhesion of surface contaminants caused by belt vibration or deformation, and the detachable structure simplifies the equipment maintenance process, ensures the high stability of the conveying surface, thereby reducing the positional error of the PCB board during the inspection process.

[0094] In addition, such as Figures 1 to 4 As shown, another embodiment of this utility model provides an appearance inspection device, which includes a frame, an inspection camera, and a precision line as provided in any of the above embodiments. The precision line and the inspection camera are housed within the frame, and the inspection camera is capable of performing appearance inspection on the PCB board within the precision line. The specific structure of the precision line is as described in the above embodiments. Since this appearance inspection device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0095] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A feeding and conveying device, characterized in that, The device includes a conveyor frame, a first conveyor belt assembly, and a dust-adhesive assembly. Both the first conveyor belt assembly and the dust-adhesive assembly are mounted on the conveyor frame. The first conveyor belt assembly includes a drive unit and a conveyor belt. The drive unit is used to drive the conveyor belt to move so that the conveyor belt can transport the PCB board along a first direction. The dust-adhesive assembly is used to clean the front and back surfaces of the PCB board.

2. The feeding and conveying device according to claim 1, characterized in that, The dust-adhesion assembly includes a dust-adhesion bracket, an upper dust-adhesion roller, an upper dust-adhesion paper roller, a lower dust-adhesion roller, and a lower dust-adhesion paper roller. The dust-adhesion bracket is installed on the conveyor frame. The upper dust-adhesion paper roller, the upper dust-adhesion roller, the lower dust-adhesion roller, and the lower dust-adhesion paper roller are all rotatably mounted on the dust-adhesion bracket. The upper dust-adhesion paper roller is used to perform dust-adhesion operations on the upper surface of the PCB board, and the upper dust-adhesion paper roller is used to pick up the dust on the upper dust-adhesion roller. The lower dust-adhesion roller is used to perform dust-adhesion operations on the lower surface of the PCB board, and the lower dust-adhesion paper roller is used to pick up the dust on the lower dust-adhesion roller.

3. The feeding and conveying device according to claim 1, characterized in that, The drive unit includes a rotary drive component, a first rotating shaft, and a second rotating shaft. The first conveyor belt assembly also includes a support plate. The first rotating shaft and the second rotating shaft are rotatably mounted on the conveyor frame and are spaced apart along the first direction. The conveyor belt is sleeved on the first rotating shaft and the second rotating shaft. The rotary drive component and the support plate are both mounted on the conveyor frame. The rotary drive component is used to drive the first rotating shaft and / or the second rotating shaft to rotate. The support plate is located between the upper conveyor belt and the lower conveyor belt and is used to support the upper conveyor belt.

4. The feeding and conveying device according to claim 3, characterized in that, The support plate has ventilation holes that penetrate the upper and lower surfaces of the support plate.

5. The feeding and conveying device according to claim 3, characterized in that, The first conveyor belt assembly further includes a cleaning component, which is mounted on the conveyor frame and is used to clean the conveying surface of the conveyor belt.

6. A precision thread, characterized in that, The precision line includes the feeding and conveying device as described in any one of claims 1 to 5, and further includes a second conveyor belt assembly, a first sensing assembly, and a first blocking assembly. The second conveyor belt assembly, the first blocking assembly, and the first sensing assembly are all mounted on the conveyor frame. The second conveyor belt assembly is used to convey the PCB board along the first direction. The first sensing assembly is used to sense the PCB board conveyed by the second conveyor belt assembly. The first blocking assembly is used to block or allow the PCB board conveyed by the second conveyor belt assembly to pass.

7. The precision thread body according to claim 6, characterized in that, The first sensing component includes a first sensing support frame and a first sensor. The first sensing support frame is mounted on the conveyor frame, and the first sensor is mounted on the first sensing support frame. The first sensor is used to sense the PCB board conveyed by the second conveyor belt assembly.

8. The precision thread body according to claim 6, characterized in that, The first material blocking assembly includes a first material blocking support frame, a first material blocking drive component, and a first material blocking plate. The first material blocking support frame is installed on the conveyor frame, the first material blocking drive component is installed on the first material blocking support frame, and the first material blocking plate is installed at the output end of the first material blocking drive component. The first baffle drive is used to drive the first baffle plate to rotate, so that the first baffle plate switches between a first position and a second position; When the first baffle is in the first position, it can block the PCB board so that the PCB board is in the first inspection process; when the first baffle is in the second position, it can release the PCB board.

9. The precision thread body according to claim 8, characterized in that, The precision production line also includes a second sensing component and a second blocking component. Both the second blocking component and the second sensing component are mounted on the conveyor frame. The second sensing component is used to sense the PCB board being conveyed by the second conveyor belt assembly, and the second blocking component is used to block or allow the PCB board being conveyed by the second conveyor belt assembly to pass.

10. The precision wire body according to claim 9, characterized in that, The second material blocking assembly includes a second material blocking support frame, a second material blocking drive component, and a second material blocking plate. The second material blocking support frame is installed on the conveyor frame, the second material blocking drive component is installed on the second material blocking support frame, and the second material blocking plate is installed at the output end of the second material blocking drive component. The second baffle drive is used to drive the second baffle plate to rotate, so that the second baffle plate switches between the third position and the fourth position; When the second baffle is in the third position, the baffle can block the PCB board so that the PCB board is in the second inspection process; when the second baffle is in the fourth position, the second baffle can release the PCB board.

11. The precision wire body according to claim 10, characterized in that, The precision production line also includes a third conveyor belt assembly and a backlight assembly. The third conveyor belt assembly and the backlight assembly are both mounted on the conveyor frame, and the first conveyor belt assembly, the second conveyor belt assembly and the third conveyor belt assembly are spaced apart along the first direction. The backlight assembly is located between the second conveyor belt assembly and the third conveyor belt assembly. The backlight assembly is used to illuminate the PCB board so that defects in the inner wall of the holes of the PCB board can be captured by the camera.

12. The precision thread according to claim 11, characterized in that, The conveyor frame is provided with a mounting groove at its bottom between the second conveyor belt assembly and the third conveyor belt assembly. The backlight assembly is disposed in the mounting groove, and the illumination light emitted by the backlight assembly can be emitted from the opening of the mounting groove.

13. The precision wire body according to claim 12, characterized in that, The precision production line also includes a belt clamp, and the conveyor frame is provided with a mounting part. The belt clamp is installed in the mounting part to limit the movement of the conveyor belts of the second conveyor belt assembly and / or the third conveyor belt assembly.

14. An appearance inspection device, characterized in that, The device includes a frame, an inspection camera, and a precision production line as described in any one of claims 6 to 13, wherein the precision production line and the inspection camera are housed within the frame, and the inspection camera is used to perform visual inspection on the PCB board within the precision production line.

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