A telescopic spraying device for steel surface defect detection

Abstract

The utility model belongs to steel spraying detection technical field especially is a kind of telescopic spraying device for steel surface defect detection, including conveying frame, spraying machine arm and high-definition detection head, conveying frame is equipped with the conveyer belt for conveying steel product, the first end of conveying frame is equipped with spraying machine arm;The top of detection frame is slidably installed with conveying frame, the detachable high-definition detection head is installed in positioning clamp;By integrating spraying machine arm and high-definition detection head on the same set of conveying system, first, steel surface is evenly sprayed, surface defect is converted into easily identifiable pigment coating defect, greatly improve the accuracy and reliability of defect identification, through the arbitrary positioning of high-definition detection head in three-dimensional space, not only can comprehensive cover all surface areas of large workpiece, also can be through accurate lifting focusing, always make detection head in the best working distance, obtain the clearest image.

Description

Technical Field

[0001] This utility model belongs to the field of steel spraying inspection technology, specifically relating to a retractable spraying device for detecting defects on steel surfaces. Background Technology

[0002] In the manufacturing process of steel products, surface quality is one of the key indicators for measuring their quality. Surface defects such as cracks, pits, and rust spots can seriously affect the mechanical properties, corrosion resistance, and aesthetics of the product. Therefore, 100% defect detection of steel product surfaces is an essential procedure.

[0003] Currently, the main methods for inspecting the surface of steel products include manual visual inspection and automated optical inspection. Manual visual inspection relies on the experience of workers and has problems such as high labor intensity, low efficiency, susceptibility to subjective factors, easy to miss detections, and inability to make quantitative records, which can hardly meet the needs of modern large-scale production.

[0004] Many existing devices are equipped with moving detection heads, but their degrees of freedom of movement are limited. They can usually only move within a two-dimensional plane, making it difficult to adjust the focal length in real time according to the slight undulations of the product surface. This may lead to blurred images and affect detection accuracy. In particular, when the reflective properties of steel products are complex or there is oil, direct optical detection is more difficult, the signal-to-noise ratio is low, and defects are difficult to identify. To address this, we propose a retractable spraying device for steel surface defect detection. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a retractable spraying device for detecting defects on steel surfaces.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a retractable spraying device for detecting defects on steel surfaces, comprising a conveyor frame, a spraying robot arm, and a high-definition detection head. A conveyor belt for conveying steel products is installed on the conveyor frame, a spraying robot arm is installed at the front end of the conveyor frame, and a pigment nozzle is installed at the end of the spraying robot arm.

[0007] A testing frame is fixedly installed on the conveying frame. A transmission frame is slidably installed on the top of the testing frame. A transmission block is provided on one side of the transmission frame. A transmission screw is threaded into the transmission block. A transmission motor is installed at one end of the transmission screw. A translation seat is engaged on the transmission frame. A lifting hydraulic cylinder is installed at one end of the translation seat. A lifting block is connected to the lower end of the piston rod of the lifting hydraulic cylinder. A positioning clamp is installed on one side of the lifting block. A high-definition testing head is detachably installed in the positioning clamp.

[0008] As a preferred embodiment of the retractable spraying device for detecting defects on steel surfaces according to this utility model, a fixing knob is provided on one side of the positioning clamp, and a clamping plate is connected to the end of the fixing knob.

[0009] In a preferred embodiment of the retractable spraying device for detecting defects on steel surfaces according to this utility model, the fixing knob is a bolt, the threaded end of which passes through the side wall of the positioning clamp.

[0010] In a preferred embodiment of the retractable spraying device for detecting defects on steel surfaces according to this utility model, the positioning clamp is a slot structure with an opening, and the clamping plate can move along the side wall of the slot under the drive of the fixing knob to clamp or release the high-definition detection head.

[0011] In a preferred embodiment of the retractable spraying device for detecting defects on steel surfaces according to this utility model, the snap-fit ​​connection between the translation seat and the conveyor frame allows the translation seat to slide longitudinally along the conveyor frame.

[0012] In a preferred embodiment of the retractable spraying device for detecting defects on steel surfaces according to this utility model, the connection between the translation seat and the conveyor frame is a snap-fit ​​sliding connection. The cross-section of the conveyor frame is an inverted U-shaped guide rail. The translation seat is provided with pulleys that are adapted to the shape of the guide rail, so that the translation seat can slide flexibly along the length direction of the conveyor frame.

[0013] In a preferred embodiment of the retractable spraying device for detecting defects on steel surfaces according to this utility model, the lifting hydraulic cylinder drives the lifting block and the high-definition detection head to move vertically upwards and downwards.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: By integrating the spraying robot arm and the high-definition detection head into the same conveying system, the steel surface is first uniformly sprayed, transforming surface defects into easily identifiable pigment coating defects. This effectively avoids interference from the steel's own reflection and uneven color on optical detection, greatly improving the accuracy and reliability of defect identification. Through the coordinated work of the X-axis moving system composed of the conveyor frame, conveyor motor, and lead screw, the Y-axis moving system realized by the translation seat, and the Z-axis lifting system realized by the lifting hydraulic cylinder, the high-definition detection head can be arbitrarily positioned in three-dimensional space. It can not only fully cover all surface areas of large workpieces, but also, through precise lifting and focusing, always keep the detection head at the optimal working distance to obtain the clearest image, thereby ensuring no blind spots in detection and high-definition images. This prevents the problem that existing equipment, although equipped with a moving detection head, has limited freedom of movement, affecting detection accuracy. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the testing frame of this utility model;

[0018] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0019] Figure 4 This is a schematic diagram of the structure of the conveyor frame of this utility model.

[0020] In the diagram: 1. Conveyor frame; 2. Conveyor belt; 3. Spraying robot arm; 4. Pigment nozzle; 5. Inspection frame; 6. Conveyor frame; 7. Lifting hydraulic cylinder; 8. Lifting block; 9. Translation seat; 10. Positioning clamp; 11. Fixing knob; 12. Clamping plate; 13. Conveyor block; 14. Conveyor screw; 15. Conveyor motor; 16. High-definition inspection head. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 scope of protection of the present utility model. Embodiment 1

[0022] like Figures 1-4 As shown;

[0023] A retractable spraying device for detecting defects on steel surfaces includes a conveyor frame 1, a spraying robot arm 3, and a high-definition detection head 16. A conveyor belt 2 for conveying steel products is installed on the conveyor frame 1. The spraying robot arm 3 is installed at the beginning of the conveyor frame 1, and a pigment nozzle 4 is installed at the end of the spraying robot arm 3. A detection frame 5 is fixedly installed on the conveyor frame 1. A conveyor frame 6 is slidably installed on the top of the detection frame 5. A conveyor block 13 is provided on one side of the conveyor frame 6. A conveyor screw 14 is threaded into the conveyor block 13. A conveyor motor 15 is installed at one end of the conveyor screw 14. A translation seat 9 is engaged on the conveyor frame 6. A lifting hydraulic cylinder 7 is installed at one end of the translation seat 9. A lifting block 8 is connected to the lower end of the piston rod of the lifting hydraulic cylinder 7. A positioning clamp 10 is installed on one side of the lifting block 8. The high-definition detection head 16 is detachably installed in the positioning clamp 10.

[0024] In this implementation scheme: by integrating the spraying robot arm 3 and the high-definition inspection head 16 onto the same conveying system, the steel surface is first uniformly sprayed, transforming surface defects into easily identifiable pigment coating defects. This effectively avoids interference from the steel's own reflection and uneven color on optical inspection, greatly improving the accuracy and reliability of defect identification. Through the X-axis moving system composed of the conveyor frame 6, the conveyor motor 15, and the lead screw, the Y-axis moving system realized by the translation seat 9, and the Z-axis lifting system realized by the lifting hydraulic cylinder 7, the three work together to allow the high-definition inspection head 16 to be positioned arbitrarily in three-dimensional space. This not only fully covers all surface areas of large workpieces, but also ensures that the inspection head is always at the optimal working distance through precise lifting and focusing, acquiring the clearest image, thereby ensuring no blind spots in inspection and high-definition images.

[0025] In an optional embodiment, a fixing knob 11 is provided on one side of the positioning clamp 10, and a clamping plate 12 is connected to the end of the fixing knob 11.

[0026] In this implementation scheme, the clamping plate 12 is driven to move linearly by rotating the fixing knob 11, which constitutes a simple and reliable fast clamping mechanism. This makes the installation, disassembly and maintenance of the high-definition detection head 16 very convenient, without the need for special tools, thus saving time.

[0027] In an alternative embodiment, the fixing knob 11 is a bolt with its threaded end passing through the sidewall of the positioning clamp 10.

[0028] In this implementation scheme, the threaded drive provides a self-locking function, which ensures that the clamping force is effective and lasting and will not loosen due to vibration. The threaded fit allows for extremely fine adjustment of the advance and retreat, and the operator can precisely control the clamping force on the high-definition detection head 16, which can ensure a secure fixation and avoid damage to the precision optical detection head due to excessive force.

[0029] In an optional embodiment, the positioning clamp 10 is a slot structure with an opening, and the clamping plate 12 can move along the side wall of the slot under the drive of the fixing knob 11 to clamp or release the high-definition detection head 16.

[0030] In this implementation scheme, the clamping plate 12 moves along the side wall of the slot to ensure the correct direction of the clamping force, preventing the detection head from being pressed out of place. This surface contact clamping method distributes pressure, preventing the detection head housing from deforming or being damaged due to localized stress concentration.

[0031] In an optional embodiment, the snap-fit ​​connection between the translation seat 9 and the conveyor frame 6 allows the translation seat 9 to slide longitudinally along the conveyor frame 6.

[0032] In this implementation scheme, longitudinal sliding allows the operator or automatic control system to precisely position the high-definition detection head 16 above any point to be measured on the workpiece surface, greatly expanding the detection range.

[0033] In an optional embodiment, the translation seat 9 and the conveyor frame 6 are connected by a snap-fit ​​sliding connection. The cross-section of the conveyor frame 6 is an inverted U-shaped guide rail. The translation seat 9 is provided with pulleys that are adapted to the shape of the guide rail, so that the translation seat 9 can slide flexibly along the length direction of the conveyor frame 6.

[0034] In this implementation plan, the inverted U-shaped guide rail and pulley are used to transform sliding friction into rolling friction, making the movement of the translation seat 9 and the entire detection unit, including the lifting hydraulic cylinder 7 and the high-definition detection head 16, very easy and smooth.

[0035] In an optional embodiment, the lifting hydraulic cylinder 7 drives the lifting block 8 and the high-definition detection head 16 to move vertically up and down.

[0036] In this implementation scheme: the lifting hydraulic cylinder 7 serves as a power source, capable of outputting enormous linear thrust, with strong load-bearing capacity, stable and reliable operation, and good anti-interference performance. By controlling the stroke of the hydraulic cylinder, the distance between the high-definition detection head 16 and the workpiece surface can be precisely adjusted, thereby achieving accurate focusing and ensuring the acquisition of the clearest image. The lifting motion also allows the detection head to rise during non-working periods, effectively avoiding collisions with workpieces passing below, and playing an important safety protection role.

[0037] Working principle:

[0038] The steel product to be inspected is placed on the conveyor belt 2 supported by the conveyor frame 1. The high-definition inspection head 16 is placed into the slot of the positioning clamp 10. The fixing knob 11 is rotated to push the clamping plate 12 at its end to move inward, thereby firmly clamping the high-definition inspection head 16 and ensuring stability during the inspection process. The spraying robot arm 3 installed at the head end is started. The pigment nozzle 4 below it sprays the specific inspection pigment evenly onto the surface of the steel product. After the spraying is completed, the conveyor belt 2 is started. Driven by the drive device composed of a motor and rollers, the conveyor belt 2 runs continuously at a constant speed. The steel product is transported to the area directly below the inspection frame 5 under the continuous drive of the conveyor belt 2 and pauses here to wait for inspection.

[0039] At this time, the detection system installed on top of the detection frame 5 starts working. Through a multi-stage motion mechanism, the high-definition detection head 16 is precisely positioned in three-dimensional space. The transmission motor 15 starts, driving the transmission screw 14 to rotate, which in turn drives the transmission block 13, which meshes with the transmission screw 14, to move horizontally. Since the transmission frame 6 is connected to the transmission block 13, the entire detection unit, including the translation seat 9, lifting hydraulic cylinder 7, etc., suspended below the transmission frame 6, can move left and right along the length of the transmission frame 6 to scan the width of the steel product. The translation seat 9 is engaged with one end of the transmission frame 6 and can slide along the track of the transmission frame 6, thereby achieving coverage of the length of the steel product, i.e., the forward direction of the conveyor belt 2. By cooperating with the X-axis movement, the detection head can be positioned at any position in the horizontal plane.

[0040] The lifting hydraulic cylinder 7 is fixed on the translation seat 9. Its piston rod extends downward or retracts, driving the lifting block 8 below to move vertically. This not only adjusts the distance between the high-definition detection head 16 and the surface of the steel product to adapt to different working heights, but more importantly, it enables focusing to ensure the acquisition of the clearest surface image. After the three-dimensional moving mechanism accurately positions the high-definition detection head 16 above the point to be measured, the high-definition detection head 16 begins to collect image data of the surface of the steel product. The high-definition detection head 16 is an industrial camera that takes pictures or continuously records videos of the surface of the steel product directly below it. Based on machine vision defect recognition, physical defects on the steel surface that are difficult to observe directly, such as tiny scratches and pits, are transformed into easily identifiable coating defects. By analyzing the uniformity of the sprayed color, the presence of breakpoints, accumulations, or color differences in the image, the integrity of the steel surface at that location is intelligently judged.

[0041] After completing a full scan and inspection of the current product, conveyor belt 2 restarts, sending the inspected product out of the device and simultaneously sending in the next product to be processed, starting a new cycle.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A retractable spraying device for detecting defects on steel surfaces, comprising a conveying frame (1), a spraying robotic arm (3), and a high-definition detection head (16), characterized in that: The conveyor frame (1) is equipped with a conveyor belt (2) for conveying steel products. A spraying robot arm (3) is installed at the head end of the conveyor frame (1), and a pigment nozzle (4) is installed at the end of the spraying robot arm (3). A detection frame (5) is fixedly installed on the conveying frame (1). A conveyor frame (6) is slidably installed on the top of the detection frame (5). A conveyor block (13) is provided on one side of the conveyor frame (6). A conveyor screw (14) is threaded into the conveyor block (13). A conveyor motor (15) is installed at one end of the conveyor screw (14). A translation seat (9) is snapped onto the conveyor frame (6). A lifting hydraulic cylinder (7) is installed at one end of the translation seat (9). A lifting block (8) is connected to the lower end of the piston rod of the lifting hydraulic cylinder (7). A positioning clamp (10) is installed on one side of the lifting block (8). A high-definition detection head (16) is detachably installed inside the positioning clamp (10).

2. The retractable spraying device for detecting defects on steel surfaces according to claim 1, characterized in that: A fixing knob (11) is provided on one side of the positioning clamp (10), and a clamping plate (12) is connected to the end of the fixing knob (11).

3. The retractable spraying device for detecting defects on steel surfaces according to claim 2, characterized in that: The fixing knob (11) is a bolt, the threaded end of which passes through the side wall of the positioning clamp (10).

4. The retractable spraying device for detecting defects on steel surfaces according to claim 2, characterized in that: The positioning clamp (10) is a slot structure with an opening. The clamping plate (12) can move along the side wall of the slot under the drive of the fixing knob (11) to clamp or release the high-definition detection head (16).

5. The retractable spraying device for detecting defects on steel surfaces according to claim 1, characterized in that: The snap-fit ​​connection between the translation seat (9) and the conveyor frame (6) allows the translation seat (9) to slide along the longitudinal direction of the conveyor frame (6).

6. The retractable spraying device for detecting defects on steel surfaces according to claim 1, characterized in that: The translation seat (9) and the conveyor frame (6) are connected by a snap-fit ​​sliding connection. The cross-section of the conveyor frame (6) is an inverted U-shaped guide rail. The translation seat (9) is provided with pulleys that are adapted to the shape of the guide rail, so that the translation seat (9) can slide along the length direction of the conveyor frame (6).

7. The retractable spraying device for detecting defects on steel surfaces according to claim 1, characterized in that: The lifting hydraulic cylinder (7) drives the lifting block (8) and the high-definition detection head (16) to move vertically.

Images