A visual continuous detection line for surface defects of galvanized steel strip

Abstract

The utility model relates to galvanized strip steel detection technical field especially for a kind of galvanized strip steel surface defect vision continuous detection line, including support, detection mechanism is provided on the support and is used for galvanized strip steel surface defect vision detection, detection mechanism includes: main component, including the stand fixed on support, and industrial camera is installed in the front end of stand through first mounting bracket;Adjusting component, including the shaft support being set on main component, shaft support inside between the front and back two ends is rotatably installed with shaft seat, shaft seat inside is rotatably installed with connector, and the front end of shaft seat is fixed with support arm, guide wheel is set up in support arm inside, and double-shaft air cylinder is installed in the front end of shaft support;Through the dynamic adjustment of air cylinder drive to realize the pitch angle of air knife, real-time removal strip steel surface zinc ash;While using servo drive control air knife rotation angle, automatically adapt different width strip steel, ensure that sweeping airflow is fully covered, realize the stable cleaning effect in high-speed continuous detection process.

Description

Technical Field

[0001] This utility model relates to the field of galvanized steel strip inspection technology, specifically a continuous visual inspection line for surface defects of galvanized steel strip. Background Technology

[0002] Galvanized steel strip, as an important metal material, is widely used in construction, home appliances, automobile manufacturing and other fields. Its surface quality directly affects the corrosion resistance and aesthetics of the products. In modern industrial production, galvanized steel strip adopts a continuous production method, and a uniform zinc layer is formed on the surface of the steel strip through hot-dip galvanizing or electroplating processes. The surface of the steel strip needs to be monitored in real time during the production process.

[0003] According to CN220542784U, a visual inspection device for the surface of galvanized steel strip is disclosed. This technology discloses a technical solution including "an inspection box, the inside of which is provided with a placement groove, and observation ports are provided on both sides of the inspection box. A mounting frame is installed on one side of the top of the inspection box, and the inside of the mounting frame is provided with a through groove. Mounting plates are installed on both sides of the top of the mounting frame, and electric push rods are installed on the inner walls of the top of the two sets of mounting plates. The bottom ends of the two sets of electric push rods are fixed to the top of the baffle." This solution has the technical effect of "effectively solving the problem that the operation steps are cumbersome and the surface of galvanized steel strip cannot be directly observed and inspected when performing visual inspection of the gloss of the surface of galvanized steel strip by means of components such as placement groove, observation port, mounting frame, through groove, mounting plate, electric push rod, baffle, extension plate, battery and strong light".

[0004] In high-speed continuous production, existing galvanized steel strip surface defect detection systems suffer from problems such as the inability to effectively remove residual zinc ash and oil stains from the steel strip surface in real time. This severely affects the image quality captured by industrial cameras, causing surface defect features to be obscured or interfered with by contaminants, resulting in missed detections and misjudgments. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a continuous visual inspection line for surface defects in galvanized steel strip. It uses a cylinder to drive the dynamic adjustment of the air knife's pitch angle, removing zinc ash from the strip surface in real time. Simultaneously, a servo drive controls the air knife's rotation angle, automatically adapting to strips of different widths to ensure comprehensive airflow coverage and achieve stable cleaning results during high-speed continuous inspection.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a continuous visual inspection line for surface defects of galvanized steel strip, comprising a support, wherein an inspection mechanism is mounted on the support and used for visual inspection of surface defects of galvanized steel strip, the inspection mechanism comprising:

[0007] The main component includes a stand fixed on a bracket, with an industrial camera mounted on the front end of the stand via a first mounting bracket;

[0008] The adjustment assembly includes a shaft bracket mounted on the main body assembly. A shaft seat is rotatably mounted between the front and rear ends inside the shaft bracket. A connector is rotatably mounted through the shaft seat. A support arm is fixed to the front end of the shaft seat. A guide wheel is provided inside the support arm. A dual-axis cylinder is mounted at the front end of the shaft bracket. A connector is fixed to the output end below the dual-axis cylinder. A guide plate is fixed to the upper end of the outer wall of the connector. A transverse guide groove is provided inside the guide plate, and the guide wheel is located inside the guide groove. An air knife is mounted at the lower end of the connector.

[0009] Preferably, the adjustment assembly further includes a driven pulley fixed to the upper end of the connector, a servo motor mounted on the outer wall of the bearing seat, a driving pulley fixed to the output end of the servo motor, and a belt installed between the driving pulley and the driven pulley.

[0010] Preferably, the main component further includes an extension frame fixed on the upright, and the front end of the extension frame is fixed to the shaft frame via a second mounting frame.

[0011] Preferably, the main body assembly further includes a cover fixed to the outside of the bearing seat.

[0012] Preferably, tension rollers are provided on both sides of the front end of the bracket, and guide rollers are provided in the middle of the front end of the bracket.

[0013] Preferably, the shooting direction of the industrial camera forms an angle of 5° to 30° with the normal of the galvanized steel strip surface, and a replaceable polarizing filter is installed in front of the lens of the industrial camera.

[0014] Beneficial effects

[0015] This invention provides a continuous visual inspection line for surface defects in galvanized steel strip. Compared with existing technologies, it has the following advantages:

[0016] 1. The dual-axis cylinder drives the guide plate to move through the connecting parts. The guide plate converts the linear motion into the swing of the support arm through the sliding cooperation between the guide groove and the guide wheel, thereby precisely controlling the pitch angle of the air knife. It can dynamically adjust the blowing angle of the air knife when the strip is running at high speed, and remove the zinc ash on the surface in real time without interrupting the inspection process.

[0017] 2. The output of the servo motor drives the active pulley to rotate in conjunction with the belt, which in turn drives the driven pulley to rotate. The driven pulley then drives the air knife on the connector to rotate. This is used to adapt to galvanized steel strips of different widths. When the inspection line processes steel strips of different specifications, the servo motor can drive the air knife to rotate to the optimal working angle to ensure that the blowing airflow always covers the entire width range of the steel strip. Attached Figure Description

[0018] Figure 1This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the detection mechanism in this utility model;

[0020] Figure 3 This is a schematic diagram of the adjustment component in this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the adjustment component in this utility model.

[0022] In the diagram: 1. Bracket; 2. Detection mechanism; 21. Main component; 211. Stand; 212. First mounting bracket; 213. Industrial camera; 214. Extension bracket; 215. Second mounting bracket; 22. Adjustment component; 221. Shaft bracket; 222. Shaft seat; 223. Connector; 224. Support arm; 225. Guide wheel; 226. Dual-axis cylinder; 227. Connector; 228. Guide plate; 229. Guide groove; 2210. Driven pulley; 2211. Servo motor; 2212. Drive pulley; 2213. Belt; 2214. Cover; 23. Air knife; 3. Tension roller; 4. Guide roller. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a continuous visual inspection line for surface defects of galvanized strip steel, including a support 1, on which an inspection mechanism 2 is provided for visual inspection of surface defects of galvanized strip steel, the inspection mechanism 2 including:

[0025] The main component 21 includes a stand 211 fixed on the bracket 1, and an industrial camera 213 is mounted on the front end of the stand 211 via a first mounting bracket 212;

[0026] The adjustment assembly 22 includes a shaft bracket 221 mounted on the main assembly 21. A shaft seat 222 is rotatably mounted between the front and rear ends inside the shaft bracket 221. A connector 223 is rotatably mounted through the shaft seat 222. A support arm 224 is fixed to the front end of the shaft seat 222. A guide wheel 225 is provided inside the support arm 224. A dual-axis cylinder 226 is mounted to the front end of the shaft bracket 221. A connector 227 is fixed to the lower output end of the dual-axis cylinder 226. A guide plate 228 is fixed to the upper end of the outer wall of the connector 227. A transverse guide groove 229 is provided inside the guide plate 228, and the guide wheel 225 is located inside the guide groove 229. An air knife 23 is mounted at the lower end of the connector 223.

[0027] In this embodiment, the dual-axis cylinder 226 drives the guide plate 228 to move through the connector 227. The guide plate 228 converts the linear motion into the swing of the support arm 224 through the sliding cooperation between the guide groove 229 and the guide wheel 225, thereby precisely controlling the pitch angle of the air knife 23. It can dynamically adjust the blowing angle of the air knife 23 when the strip is running at high speed, and remove the zinc ash on the surface in real time without interrupting the inspection process.

[0028] Specifically, the adjustment assembly 22 also includes a driven pulley 2210 fixed on the upper end of the connector 223, a servo motor 2211 mounted on the outer wall of the bearing 222, a drive pulley 2212 fixed at the output end of the servo motor 2211, and a belt 2213 installed between the drive pulley 2212 and the driven pulley 2210.

[0029] In this embodiment, the output of the servo motor 2211 drives the active pulley 2212 to rotate in conjunction with the belt 2213, which in turn drives the driven pulley 2210 to rotate. The driven pulley 2210 then drives the air knife 23 on the connector 223 to rotate. This is used to adapt to galvanized steel strips of different widths. When the inspection line processes steel strips of different specifications, the servo motor 2211 can drive the air knife 23 to rotate to the optimal working angle to ensure that the blowing airflow always covers the entire width range of the steel strip.

[0030] Specifically, the main component 21 also includes an extension frame 214 fixed on the upright frame 211, and the front end of the extension frame 214 is fixed to the shaft frame 221 through the second mounting frame 215.

[0031] In this embodiment, the extension frame 214 extends forward from the upright frame 211 to form a rigid support structure, providing an additional fixed support point for the shaft frame 221.

[0032] Specifically, the main body component 21 also includes a cover 2214 fixed outside the bearing seat 222; by setting the cover 2214 outside the bearing seat 222, all-round protection is provided for the key transmission components of the detection mechanism 2.

[0033] In this embodiment, the cover 2214 adopts a sealed design, which effectively prevents the intrusion of pollutants such as zinc ash, oil stains and water vapor generated during the galvanizing process.

[0034] Specifically, tension rollers 3 are provided on both sides of the front end of the bracket 1, and guide rollers 4 are provided in the middle of the front end of the bracket 1.

[0035] In this embodiment, the tension roller 3 and the guide roller 4 together form the guide for the strip's movement, ensuring that the strip maintains ideal flatness and running trajectory before entering the detection mechanism 2, providing a stable shooting reference surface for the industrial camera 213.

[0036] Specifically, the shooting direction of the industrial camera 213 forms an angle of 5° to 30° with the normal of the galvanized steel strip surface, and a replaceable polarizing filter is installed in front of the lens of the industrial camera 213.

[0037] In this embodiment, the industrial camera 213 adopts a tilt shooting method and is equipped with a replaceable polarizing filter, which significantly improves the imaging quality of surface defects of galvanized steel strip. The tilted installation angle of the industrial camera 213 effectively avoids strong light interference caused by specular reflection on the steel strip surface, so that the tiny defects on the zinc layer surface can be clearly imaged.

[0038] The working principle and usage process of this utility model are as follows: First, the tension roller 3 and the guide roller 4 together form the guide for the strip steel to run, so that the strip steel always maintains ideal flatness and running trajectory before entering the detection mechanism 2, providing a stable shooting reference surface for the industrial camera 213.

[0039] Furthermore, the output of the servo motor 2211 drives the active pulley 2212 in conjunction with the belt 2213 to rotate the driven pulley 2210, which in turn drives the air knife 23 on the connector 223 to rotate. This is used to adapt to galvanized steel strips of different widths. When the inspection line processes steel strips of different specifications, the servo motor 2211 can drive the air knife 23 to rotate to the optimal working angle to ensure that the blowing airflow always covers the entire width range of the steel strip.

[0040] Then, the dual-axis cylinder 226 drives the guide plate 228 to move through the connector 227. The guide plate 228 converts the linear motion into the swing of the support arm 224 through the sliding cooperation between the guide groove 229 and the guide wheel 225, thereby precisely controlling the pitch angle of the air knife 23. It can dynamically adjust the blowing angle of the air knife 23 when the strip is running at high speed, and remove the zinc ash on the surface in real time without interrupting the inspection process.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A continuous visual inspection line for surface defects of galvanized steel strip, comprising a support (1), characterized in that: The bracket (1) is equipped with a detection mechanism (2) for visual inspection of surface defects of galvanized steel strip. The detection mechanism (2) includes: The main component (21) includes a stand (211) fixed on a bracket (1), and an industrial camera (213) is mounted on the front end of the stand (211) via a first mounting bracket (212); The adjustment assembly (22) includes a shaft bracket (221) mounted on the main assembly (21). A shaft seat (222) is rotatably mounted between the front and rear ends inside the shaft bracket (221). A connector (223) is rotatably mounted through the shaft seat (222). A support arm (224) is fixed to the front end of the shaft seat (222). A guide wheel (225) is provided inside the support arm (224). A double-axis cylinder (226) is mounted to the front end of the shaft bracket (221). A connector (227) is fixed to the output end below the double-axis cylinder (226). A guide plate (228) is fixed to the upper end of the outer wall of the connector (227). A transverse guide groove (229) is provided inside the guide plate (228), and the guide wheel (225) is located inside the guide groove (229). An air knife (23) is mounted at the lower end of the connector (223).

2. The continuous visual inspection line for surface defects of galvanized strip steel according to claim 1, characterized in that: The adjustment assembly (22) also includes a driven pulley (2210) fixed to the upper end of the connector (223), a servo motor (2211) mounted on the outer wall of the bearing seat (222), a driving pulley (2212) fixed to the output end of the servo motor (2211), and a belt (2213) installed between the driving pulley (2212) and the driven pulley (2210).

3. The continuous visual inspection line for surface defects of galvanized strip steel according to claim 1, characterized in that: The main component (21) also includes an extension frame (214) fixed on the upright (211), and the front end of the extension frame (214) is fixed to the shaft frame (221) through a second mounting frame (215).

4. The continuous visual inspection line for surface defects of galvanized strip steel according to claim 1, characterized in that: The main body assembly (21) also includes a cover (2214) fixed to the outside of the bearing (222).

5. A continuous visual inspection line for surface defects of galvanized strip steel according to claim 1, characterized in that: Tension rollers (3) are provided on both sides of the front end of the bracket (1), and guide rollers (4) are provided in the middle of the front end of the bracket (1).

6. The continuous visual inspection line for surface defects of galvanized strip steel according to claim 1, characterized in that: The shooting direction of the industrial camera (213) is at an angle of 5° to 30° to the normal of the galvanized steel strip surface, and a replaceable polarizing filter is installed in front of the lens of the industrial camera (213).

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