A visual detector for metal surface spraying uniformity

Abstract

The utility model provides a metal surface spraying evenness vision detector, including detection platform, the detection platform middle part is provided with vision detection subassembly, the both sides of vision detection subassembly are equipped with several vertical and horizontal distribution's connecting plate. The utility model discloses four industrial cameras can be set up on the concentric ring frame circumferentially equidistantly, can carry out image acquisition to its outer surface from four different angles simultaneously in the instant of metal circular tube passing through the detection center, ensures that can obtain the surface image of cylindrical workpiece whole circumferential direction one time, adopts the multiple motor drive's roll of horizontal and vertical distribution to carry out clamping and convey simultaneously to work piece, not only provides the stable driving force, also formed effective horizontal and vertical limit, prevents the workpiece from jumping, swinging or axial rotation in the course of advancing through this conveying mode, ensures that it always passes through the detection area with stable posture and the position of the center.

Description

Technical Field

[0001] This utility model belongs to the field of metal surface inspection technology, and more specifically, it relates to a visual inspection instrument for the uniformity of metal surface coating. Background Technology

[0002] In the field of metal processing and manufacturing, many metal tubular workpieces (such as guardrails, furniture fittings, and robotic arm housings) require surface spraying for corrosion protection or decoration purposes. The uniformity of the spraying, including the consistency of coating thickness, color uniformity, and the absence of defects such as missed spraying, drips, and orange peel, is a key indicator for measuring product quality.

[0003] Currently, traditional visual inspection equipment used for checking the uniformity of coating on the surface of metal tubes still has some shortcomings in practical applications: Firstly, the scanning method using a single camera combined with workpiece rotation can cover the entire surface, but it is inefficient and requires extremely high precision from the rotating mechanism; even slight fluctuations can affect the image quality. Secondly, it is difficult to effectively suppress the workpiece's swaying, jumping, or rotation during the transmission process, resulting in inaccurate image position and making it impossible to perform accurate analysis and evaluation.

[0004] Furthermore, existing equipment is often ill-suited for workpieces of varying diameters, lacking sufficient flexibility. Therefore, there is an urgent need for a visual inspection solution that can achieve efficient, stable, comprehensive inspection with high adaptability. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a visual inspection instrument for the uniformity of metal surface coating, which is achieved by the following specific technical means: A visual inspection instrument for uniformity of metal surface coating includes an inspection platform and a circular frame. A visual inspection component is disposed in the center of the inspection platform. Several vertically and horizontally distributed connecting plates are respectively provided on both sides of the visual inspection component. A pair of brackets are slidably installed on each connecting plate. A rotating roller is rotatably installed in each bracket. A motor is fixedly installed on each bracket. The output shaft of each motor is fixedly connected to the shaft end of the rotating roller. The pair of rotating rollers on the horizontally distributed connecting plates is used to horizontally limit the metal tube, and the pair of rotating rollers on the vertically distributed connecting plates is used to vertically limit the metal tube. Several industrial cameras for photographing the metal tube are fixedly installed circumferentially on the circular frame.

[0006] Furthermore, the number of industrial cameras is four, and the surface of the circular frame has four mounting holes equidistantly spaced, with each industrial camera inserted into a mounting hole.

[0007] Furthermore, each of the industrial cameras is provided with an ear block at its outer end, and each ear block is screwed into a bolt, which is used to fix the industrial camera to the ring frame by the bolt.

[0008] Furthermore, both sides of the bottom end of the circular frame are fixedly connected to fixing plates, and each fixing plate is screwed in with a bolt. Each fixing plate is threaded to the upper end of the testing platform by the bolt.

[0009] Furthermore, each of the brackets is fixedly installed with a dovetail block at its end, and each of the connecting plates has dovetail grooves on both sides of its surface, with each dovetail block slidably installed in the dovetail groove.

[0010] Furthermore, each of the connecting plates is rotatably installed with a bidirectional threaded rod, each of the two dovetail blocks passing through each other and threadedly connected to the dovetail blocks, and a handwheel is fixedly installed at the outer end of each dovetail groove.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. By equidistantly setting four industrial cameras on a concentric ring frame, images of the outer surface of the metal tube can be simultaneously acquired from four different angles the instant it passes through the detection center. This ensures that the surface image of the cylindrical workpiece in the entire circumferential direction can be obtained in one go. Multiple sets of motor-driven rollers distributed laterally and vertically simultaneously clamp and transport the workpiece, providing not only a stable driving force but also effective lateral and vertical limiting. This transport method effectively prevents the workpiece from jumping, swinging, or rotating axially during its journey, ensuring that it always passes through the detection area in a stable posture and centered position.

[0012] Second, through the coordinated design of handwheel, double-threaded rod, dovetail block and dovetail groove, the distance between the two rotating rollers can be adjusted, making the detector easily adaptable to metal round tubes of different diameters, greatly improving the application range and flexibility of the equipment; the industrial camera is fastened to the ring frame with bolts, and the industrial camera can be disassembled and installed separately. The entire ring frame is firmly installed on the inspection table by the fixing plates on both sides and bolts, forming a rigid imaging system. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the metal surface spray uniformity visual inspection instrument of this utility model.

[0014] Figure 2 This is a schematic diagram of the visual inspection component of this utility model.

[0015] Figure 3 This is a cross-sectional view of the connecting plate of this utility model.

[0016] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Inspection table; 2. Vision inspection assembly; 21. Ring frame; 22. Industrial camera; 23. Mounting port; 24. Bolt 1; 25. Fixing plate; 26. Bolt 2; 3. Connecting plate; 31. Bracket; 32. Rotary roller; 33. Motor; 34. Dovetail block; 35. Bidirectional threaded rod; 36. Dovetail groove; 37. Handwheel. Detailed Implementation

[0017] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0018] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship 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 addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Example:

[0021] As attached Figure 1 To: Attached Figure 3 As shown: This utility model provides a visual inspection instrument for the uniformity of metal surface spraying, including an inspection platform 1 and a circular frame 21. A visual inspection component 2 is arranged in the middle of the inspection platform 1. Several vertically and horizontally distributed connecting plates 3 are arranged on both sides of the visual inspection component 2. A pair of brackets 31 are slidably installed on each connecting plate 3. A rotating roller 32 is rotatably installed in each bracket 31. A motor 33 is fixedly installed on each bracket 31. The output shaft of each motor 33 is fixedly connected to the shaft end of the rotating roller 32. The pair of rotating rollers 32 on the horizontally distributed connecting plate 3 is used to limit the metal tube horizontally, and the pair of rotating rollers 32 on the vertically distributed connecting plate 3 is used to limit the metal tube vertically. Several industrial cameras 22 for photographing the metal tube are fixedly installed circumferentially on the circular frame 21.

[0022] There are four industrial cameras 22. The surface of the ring frame 21 has four mounting holes 23 equidistantly spaced around its circumference, and each industrial camera 22 is inserted into a mounting hole 23.

[0023] Each industrial camera 22 has an ear block on its outer end, and each ear block has a bolt 24 screwed into it. The industrial camera 22 is threaded to the ring frame 21 by the bolt 24.

[0024] Both sides of the bottom end of the ring frame 21 are fixedly connected to the fixing plate 25. Each fixing plate 25 is screwed with a bolt 26. Each fixing plate 25 is threaded to the upper end of the testing table 1 by the bolt 26.

[0025] Each bracket 31 has a dovetail block 34 fixedly installed at its end, and each connecting plate 3 has a dovetail groove 36 on both sides of its surface. Each dovetail block 34 is slidably installed in the dovetail groove 36.

[0026] Each connecting plate 3 is rotatably installed with a bidirectional threaded rod 35, each bidirectional threaded rod 35 passing through each pair of dovetail blocks 34 and threadedly connected to the dovetail blocks 34, and a handwheel 37 is fixedly installed at the outer end of each dovetail groove 36.

[0027] The working principle of this embodiment: According to the diameter of the metal tube to be tested, rotate the handwheel 37 at the outer end of the connecting plate 3; the handwheel 37 drives the bidirectional threaded rod 35 inside the connecting plate 3 to rotate; the bidirectional threaded rod 35 passes through and is threadedly connected to the dovetail block 34 at the end of the bracket 31, and its rotation will drive the dovetail block 34 to slide in the dovetail groove 36 on the surface of the connecting plate 3; the dovetail block 34 drives the bracket 31 to move synchronously until the pair of rotating rollers 32 on the horizontally distributed connecting plate 3 and the pair of rotating rollers 32 on the vertically distributed connecting plate 3 respectively fit against the outer wall of the metal tube, completing the appropriate spacing of the horizontal and vertical limiting. The pre-treated metal tube is inserted between the rotating rollers 32 on both sides of the vision inspection component 2. The motor 33 fixedly installed on the bracket 31 is started. The output shaft of the motor 33 is fixedly connected to the shaft end of the rotating roller 32. When the motor 33 runs, it drives the rotating roller 32 to rotate. The rotating roller 32 drives the metal tube to be transported smoothly through friction. The metal tube gradually enters the center position of the circular frame 21 of the vision inspection component 2 in the middle of the inspection table 1 along the transport path of the rotating roller 32. During the transport process, the horizontal and vertical rotating rollers 32 always limit the deviation of the tube to ensure that it is in the inspection center. When the metal tube reaches the center of the ring frame 21, the four industrial cameras 22, which are equidistantly mounted on the ring frame 21, start synchronously. The industrial cameras 22 are fixed in the mounting port 23 of the ring frame 21 by lugs and bolts 24, ensuring precise and stable positioning. The four industrial cameras 22 capture images of the surface of the metal tube from different angles, capturing complete image information of the sprayed area, including details such as the spray coverage and color difference. During the inspection, the ring frame 21 is fixed to the upper end of the inspection table 1 by fixing plates 25 on both sides of the bottom and bolts 26, preventing the visual inspection component 2 from shaking and ensuring the clarity and accuracy of the captured images. The industrial cameras 22 transmit the captured image data to the background analysis system in real time. The system automatically identifies and quantifies the spray uniformity indicators (such as missed spray areas and accumulated areas) in the images.

[0028] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A visual inspection instrument for the uniformity of metal surface coating, comprising an inspection table (1) and a circular frame (21), characterized in that: The detection platform (1) is provided with a visual inspection component (2) in the middle. Several vertically and horizontally distributed connecting plates (3) are provided on both sides of the visual inspection component (2). A pair of brackets (31) are slidably installed on each connecting plate (3). A rotating roller (32) is rotatably installed in each bracket (31). A motor (33) is fixedly installed on each bracket (31). The output shaft of each motor (33) is fixedly connected to the shaft end of the rotating roller (32). A pair of rotating rollers (32) on the transverse distribution connecting plate (3) are used to limit the metal tube laterally, and a pair of rotating rollers (32) on the vertical distribution connecting plate (3) are used to limit the metal tube vertically. Several industrial cameras (22) for photographing metal tubes are fixedly installed at equal intervals around the circumference of the ring frame (21).

2. The visual inspection instrument for uniformity of metal surface spraying as described in claim 1, characterized in that: The number of industrial cameras (22) is four, and the circular frame (21) has four mounting holes (23) equidistantly spaced on its surface. Each industrial camera (22) is inserted into a mounting hole (23).

3. The visual inspection instrument for uniformity of metal surface spraying as described in claim 2, characterized in that: Each of the industrial cameras (22) has an ear block on its outer end, and each ear block has a bolt (24) screwed into it. The industrial camera (22) is threaded to the ring frame (21) by the bolt (24).

4. The visual inspection instrument for uniformity of metal surface spraying as described in claim 3, characterized in that: Both sides of the bottom end of the circular frame (21) are fixedly connected to a fixing plate (25), and each fixing plate (25) is screwed with a bolt (26). Each fixing plate (25) is threaded to the upper end of the testing table (1) by the bolt (26).

5. The visual inspection instrument for uniformity of metal surface spraying as described in claim 1, characterized in that: Each of the brackets (31) is fixedly installed with a dovetail block (34) at its end, and each of the connecting plates (3) has a dovetail groove (36) on both sides of its surface, and each dovetail block (34) is slidably installed in the dovetail groove (36).

6. The visual inspection instrument for uniformity of metal surface spraying as described in claim 5, characterized in that: Each of the connecting plates (3) is rotatably installed with a bidirectional threaded rod (35), each of the bidirectional threaded rods (35) passes through each pair of dovetail blocks (34) and is threadedly connected to the dovetail blocks (34), and a handwheel (37) is fixedly installed at the outer end of each dovetail groove (36).

Images