A coil appearance defect detector

Abstract

The utility model relates to machine vision detection and automation equipment technical field especially relates to a coil appearance defect detector, including conveying table, the conveying area below of conveying table is provided with support base, the visual defect detector in the middle part of conveying table, the right part of support base is provided with fixed plate, the left side of fixed plate is provided with guide rod. By setting adjustable limiting plate structure of guide rod guidance, one -way screw drive at conveying table both sides, and cooperate double -shaft motor synchronous drive, can according to the size of coil automatic regulation spacing, ensure that different specifications coil always is in the central position in the conveying process, effectively avoid deviation, tilt or sway, improve the stability and repeat positioning accuracy of detection process.

Description

Technical Field

[0001] This utility model relates to the field of machine vision inspection and automation equipment technology, and in particular to a coil appearance defect detector. Background Technology

[0002] In the manufacturing process of electronic components, motors, transformers, and inductors, coils, as one of the core components, directly affect the electrical performance and reliability of the final product. With the continuous improvement of intelligent manufacturing and industrial automation, electronic products are trending towards miniaturization, high integration, and high reliability, which places higher demands on the production process control of coils. Coils are prone to various appearance defects during winding, handling, and storage. Common defects include surface damage or exposed copper on the enameled wire, mechanical scratches, flattening and deformation, foreign matter adhesion, uneven winding arrangement, loose or misaligned ends, etc. If these defects are not detected in time during the production process, they may lead to serious consequences such as subsequent assembly difficulties, partial discharge, inter-turn short circuits, or even complete machine failure, which seriously affect product yield and brand reputation.

[0003] Currently, most mid-to-high-end manufacturing enterprises have gradually phased out traditional manual visual inspection methods and switched to automatic appearance inspection systems based on machine vision. These systems typically consist of a conveying device, an industrial camera, and an image processing unit. Through high-speed imaging and intelligent algorithm analysis, they can identify defects in coils. However, existing vision-based coil inspection equipment still faces many challenges in practical applications. During the conveying process, the coil lacks effective limiting and centering mechanisms, making it prone to lateral deviation, angular tilt, or vibration. This causes it to be unable to stably pass through the inspection area, resulting in image field of view shift, focal length change, or feature loss, which seriously affects image quality and defect recognition accuracy.

[0004] Therefore, there is an urgent need to provide a coil appearance defect detection instrument with coil limiting and centering functions. Utility Model Content

[0005] In order to overcome the shortcomings of existing coil appearance inspection equipment, which lacks the function of limiting and centering the coil during the conveying process, thus easily causing problems such as unstable imaging or equipment collision due to material deviation, this utility model provides a coil appearance defect inspection instrument with coil limiting and centering functions.

[0006] To address the aforementioned issues, this utility model employs the following technical solution: a coil appearance defect detector, comprising a conveyor table, a support base below the conveying area of ​​the conveyor table, a visual defect detector in the middle of the conveyor table, a fixing plate on the right side of the support base, a guide rod on the left side of the fixing plate, and symmetrically distributed one-way screws rotatably arranged on the right side of the fixing plate. A dual-axis motor is mounted on the right side of the fixing plate, and the output shafts at both ends of the dual-axis motor are fixedly connected to the corresponding one-way screws via couplings. Limiting plates are symmetrically arranged on the front and rear sides of the conveying area of ​​the conveyor table, and sliding plates are fixedly connected to both ends of the limiting plates. The sliding plate at the left end has a through hole and is slidably connected to the guide rod, while the sliding plate at the right end has a threaded hole, forming a helical pair with the one-way screws to constitute a transmission structure.

[0007] As a preferred technical solution of this utility model, the end of the limiting plate near the conveying inlet is designed as an outwardly inclined inclined guide section, and the rest of the main body is a straight limiting section.

[0008] As a preferred technical solution of this utility model, a hopper is provided at the front left side of the support base, and multiple guide grooves are provided inside the hopper. Symmetrically distributed electric guide rails are provided at the rear left side of the support base. The electric guide rails are electrically connected to the visual defect detector to achieve linkage control. A slider is slidably provided on the electric guide rails, and a connecting plate is fixedly connected to the slider. A push plate is fixedly connected to the side of the connecting plate facing the hopper.

[0009] As a preferred embodiment of this utility model, the guide trough is designed to be inclined downwards.

[0010] As a preferred embodiment of this utility model, the side of the push plate that contacts the workpiece is provided with a flexible buffer layer.

[0011] As a preferred technical solution of this utility model, a limiting seat is provided on the left side of the conveyor table, and a double-compartment collection box is configured on the limiting seat, which is located below the discharge hopper.

[0012] Compared with the prior art, the present invention has the following technical effects: 1. By setting an adjustable limiting plate structure on both sides of the conveyor table, guided by guide rods and driven by unidirectional screws, and cooperating with the synchronous drive of dual-axis motors, the limiting distance can be automatically adjusted according to the size of the coil, ensuring that coils of different specifications are always in the center position during the conveying process, effectively avoiding deviation, tilting or shaking, and improving the stability and repeatability of the detection process.

[0013] 2. By setting up an automatic sorting mechanism consisting of a hopper, electric guide rail, push plate, and dual collection box, and electrically linking it with the vision inspection system, the push plate can be intelligently controlled according to the inspection results to push qualified and unqualified products to different guide troughs, thereby completing automatic graded collection, reducing manual intervention, and improving the intelligence level of the production line. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the components of this utility model, including the conveyor platform, support base, and visual defect detector.

[0016] Figure 3 This is a three-dimensional structural diagram of the dual-axis motor, sliding plate, and limiting plate of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the components of this utility model, including the fixing plate, guide rod, and one-way screw.

[0018] Figure 5 This is a three-dimensional structural diagram of the components of this utility model, including the hopper, electric guide rail, and push plate.

[0019] Figure 6 This is a three-dimensional structural diagram of the components of this utility model, including the conveyor platform, the limiting seat, and the double-compartment collection box.

[0020] The components in the diagram are labeled as follows: 1-Conveyor table, 2-Support seat, 3-Visual defect detector, 4-Fixed plate, 5-Guide rod, 6-One-way screw, 7-Dual-axis motor, 8-Sliding plate, 9-Limiting plate, 10-Feeding hopper, 11-Electric guide rail, 12-Slider, 13-Connecting plate, 14-Push plate, 15-Limiting seat, 16-Dual-compartment collection box. Detailed Implementation

[0021] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0022] Example 1: Please refer to Figures 1-4A coil appearance defect detector includes a conveyor table 1, a support base 2 below the conveying area of ​​the conveyor table 1, and a visual defect detector 3 in the middle of the conveyor table 1 for real-time image acquisition and appearance defect identification of coils passing through the area, including common defects such as surface scratches, deformation, and enameling damage. A fixing plate 4 is provided on the right side of the support base 2, a guide rod 5 is provided on the left side of the fixing plate 4, and symmetrically distributed one-way screws 6 are rotatably arranged on the right side of the fixing plate 4. A dual-axis motor 7 is installed on the right side of the fixing plate 4, and the output shafts at both ends of the dual-axis motor 7 are fixedly connected to the corresponding one-way screws 6 via couplings. Limiting plates 9 are symmetrically arranged on both sides of the conveying area of ​​the conveyor table 1 to constrain and center the lateral position of the coil during the conveying process, ensuring its stable passage through the inspection area. The measuring area is defined by the design of the limiting plate 9. The end of the limiting plate 9 near the conveying inlet is designed as an outwardly inclined guide section, while the rest of the main body is a straight limiting section. This inclined guide section can automatically guide the coil into the central area between the two limiting plates 9, avoiding jamming or collision, and improving the smoothness of feeding and the reliability of equipment operation. Sliding plates 8 are fixed to both ends of the limiting plate 9. The sliding plate 8 at the left end has a through hole and is slidably connected to the guide rod 5 to achieve linear guidance support. The sliding plate 8 at the right end has a threaded hole, which forms a helical pair with the one-way screw 6 to form a transmission structure. When the motor rotates forward or reverse, the one-way screw 6 drives the sliding plate 8 to move through the threaded transmission, thereby pushing the entire limiting plate 9 to move synchronously inward or outward along the guiding direction of the guide rod 5, thereby achieving adaptive clamping and positioning of coils of different widths.

[0023] When using this device, the operator puts the coil to be inspected into the conveyor 1 from the right side. The conveyor 1 then smoothly transports the coil from right to left. After the coil enters the limiting area, it is gradually aligned to the center position by the inclined guide section, and its lateral swing is restricted. In addition, according to the specifications and dimensions of the current batch of coils, the dual-axis motor 7 can be pre-started to drive the unidirectional screw 6 to rotate, so that the limiting plate 9 slides along the guide rod 5 and the spacing is adjusted to match the outer width of the coil, realizing rapid changeover and precise positioning. When the coil is transported to the area directly below the visual defect detector 3, the conveyor 1 pauses briefly or maintains a constant speed. At the same time, the visual defect detector 3 starts the image acquisition program and combines the image processing algorithm to perform a comprehensive scan and analysis of the coil's circumference and end face appearance to determine whether there are any defects. After the inspection is completed, qualified products continue to be transported to the subsequent sorting mechanism, realizing fully automatic online inspection and significantly improving inspection efficiency and consistency.

[0024] Example 2: Based on Example 1, please refer to... Figure 5 and Figure 6A discharging hopper 10 is arranged at the left front part of the support base 2, inside which two material guide chutes arranged side by side are provided to realize physical isolation of qualified products and unqualified products. Moreover, the material guide chutes are designed to be inclined downward, which facilitates the smooth sliding of coils under the action of gravity. Electric guide rails 11 distributed symmetrically left and right are arranged at the left rear part of the support base 2. The electric guide rails 11 are electrically connected to the visual defect detector 3 to realize linkage control. After the coils pass through the detection area and the image analysis is completed, the visual defect detector 3 transmits the judgment result to the electric guide rails 11 in real time, so as to control the action of the electric guide rails 11. A sliding block 12 is slidably arranged on the electric guide rails 11, a connecting plate 13 is fixedly connected to the sliding block 12, and a push plate 14 is fixedly connected to the side of the connecting plate 13 facing the discharging hopper 10. The surface of the push plate 14 that contacts the workpiece is provided with a flexible buffer layer, which is used to avoid scratching the coil surface or causing damage to the enameled wire during the pushing process, and simultaneously improve the stability and safety of the pushing process. A limit seat 15 is arranged at the left part of the conveying table 1, and a dual-compartment collection box 16 is disposed on the limit seat 15. The dual-compartment collection box 16 is located below the discharging hopper 10, and is used for classified collection of qualified products and unqualified products.

[0025] After the coil is conveyed leftward to the end detection station along with the conveying table 1 and the appearance inspection is completed, the system performs a sorting action according to the identification result of the visual defect detector 3. If the coil is determined to be a qualified product, the left electric guide rail 11 is controlled to start, driving the corresponding push plate 14 to advance forward, so as to push the coil into the corresponding material guide chute. If the coil is determined to be an unqualified product, the electric guide rail 11 on the other side is started to push the coil into the other material guide chute, so as to realize automatic grading and diversion, reduce manual participation, and improve the intelligence level of the production line. After the push plate 14 completes the pushing action, it automatically returns to the initial position, and the sliding block 12 resets to the standby state to prepare for the next sorting operation.

[0026] The technical principles of the embodiments of the present utility model are described above in conjunction with specific embodiments. These descriptions are only used to explain the principles of the embodiments of the present utility model, and cannot be construed as limiting the protection scope of the embodiments of the present utility model in any way. Based on the descriptions herein, those skilled in the art can easily conceive of other specific implementations of the embodiments of the present utility model without creative efforts, and all such implementations shall fall within the protection scope of the embodiments of the present utility model.

Claims

1. A coil appearance defect detector, comprising a conveyor table (1), a support base (2) disposed below the conveying area of ​​the conveyor table (1), and a visual defect detector (3) in the middle of the conveyor table (1), characterized in that: The support base (2) is provided with a fixing plate (4) on the right side, a guide rod (5) is provided on the left side of the fixing plate (4), and a symmetrically distributed one-way screw (6) is provided on the right side of the fixing plate (4). A dual-axis motor (7) is installed on the right side of the fixing plate (4). The output shafts at both ends of the dual-axis motor (7) are fixedly connected to the corresponding one-way screw (6) through couplings. Limiting plates (9) are symmetrically arranged on the front and rear sides of the conveying area of ​​the conveying table (1). Sliding plates (8) are fixedly connected to both ends of the limiting plates (9). The sliding plate (8) at the left end has a through hole and is slidably connected to the guide rod (5). The sliding plate (8) at the right end has a threaded hole and forms a helical pair with the one-way screw (6) to form a transmission structure.

2. The coil appearance defect detector according to claim 1, characterized in that: The limiting plate (9) is designed as an outwardly inclined guide section at one end near the conveying inlet, while the rest of the main body is a straight limiting section.

3. A coil appearance defect detector according to claim 2, characterized in that: The support base (2) is provided with a feeding hopper (10) at the front left, which has multiple material guide grooves inside. The support base (2) is provided with symmetrically distributed electric guide rails (11) at the rear left. The electric guide rails (11) are electrically connected to the visual defect detector (3) to achieve linkage control. A slider (12) is slidably provided on the electric guide rails (11). A connecting plate (13) is fixedly connected to the slider (12). A push plate (14) is fixedly connected to the side of the connecting plate (13) facing the feeding hopper (10).

4. A coil appearance defect detector according to claim 3, characterized in that: The feed chute is designed to slope downwards.

5. A coil appearance defect detector according to claim 4, characterized in that: The push plate (14) has a flexible buffer layer on the side that contacts the workpiece.

6. A coil appearance defect detector according to claim 5, characterized in that: The conveyor (1) is provided with a limiting seat (15) on the left side, and a double-compartment collection box (16) is provided on the limiting seat (15). The double-compartment collection box (16) is located below the hopper (10).

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