An on-line detection device for micro-defects on the surface of cold-drawn steel

Abstract

The utility model relates to online detection device technical field, and disclose a kind of cold-drawn steel surface microdefect online detection device, including conveying track, the cold-drawn steel to be detected, the cold-drawn steel to be detected is along conveying track and goes forward, first light source emitter head A, second light source emitter head A, light source emitter head B are equipped in the upper of the cold-drawn steel to be detected, it is respectively installed on the positioning support of adjustable angle, and the surface of the cold-drawn steel to be detected is irradiated by multi-angle light, first light source emitter head A, second light source emitter head A are respectively matched with light source emitter head B, to adjust beam divergence angle and intensity, realize uniform illumination.The utility model cold-drawn steel surface microdefect online detection device, by multi-angle high-brightness light source irradiation and reflection signal acquisition realize the physical amplification detection of surface scratch, crack, pit and other microdefects, avoid dependence on electrical sensor, and detection structure is stable and reliable, suitable for high-speed online surface quality detection of cold-drawn steel in industrial field.

Description

Technical Field

[0001] This utility model relates to the field of online inspection device technology, specifically an online inspection device for micro-defects on the surface of cold-drawn steel. Background Technology

[0002] Cold-drawn steel is widely used in engineering structures and mechanical parts due to its excellent dimensional accuracy and mechanical properties. However, the cold-drawing process is prone to producing minor defects such as surface cracks and scratches. If these defects are not detected and removed in time, they will affect the quality of the finished product and may even cause safety hazards.

[0003] Traditional inspection methods rely heavily on manual visual inspection or electrical sensing equipment, which are not only inefficient and inaccurate, but also expensive and have weak anti-interference capabilities due to their dependence on sophisticated electronic identification systems for defect recognition. Therefore, there is an urgent need for a simple, physically based, and industrially applicable micro-defect detection device for cold-drawn steel surfaces. Utility Model Content

[0004] The purpose of this invention is to provide an online detection device for micro-defects on the surface of cold-drawn steel, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An online detection device for micro-defects on the surface of cold-drawn steel includes a conveyor track and the cold-drawn steel to be inspected. The cold-drawn steel to be tested moves along the conveying track. Above the cold-drawn steel to be tested, there are a first light source emitting head A, a second light source emitting head A, and a light source emitting head B, which are respectively installed on an adjustable angle positioning bracket. The surface of the cold-drawn steel to be tested is irradiated by multi-angle light. The first light source emitter A and the second light source emitter A are respectively paired with the light source emitter B to adjust the beam divergence angle and intensity to achieve uniform illumination; A reflective optical prism group is set outside the detection area of ​​the cold-drawn steel to collect the reflected light signal formed after irradiation and guide it to the imaging window.

[0006] Preferably, the roller guide assemblies are symmetrically arranged on the left and right sides of the conveying track, and each set includes at least two rollers to control the stable position of the cold-drawn steel being tested in the lateral and vertical directions.

[0007] Preferably, the imaging window presents an image of the cold-drawn steel surface through a high-resolution physical imaging lens or observation window, which facilitates manual identification or subsequent analysis.

[0008] Preferably, a coarse filter and a light shield are provided between the light source emission paths to filter ambient light interference and suppress stray light, respectively.

[0009] Preferably, the reflective optical prism group emits a first reflective optical prism group auxiliary light source and a second reflective optical prism group auxiliary light source in two directions respectively.

[0010] Preferably, the light source emitter B emits a light source B.

[0011] Compared with existing technologies, this utility model has the following advantages: This online detection device for micro-defects on the surface of cold-drawn steel achieves physical magnification detection of micro-defects such as surface scratches, cracks, and pits by irradiating and collecting reflected signals from multi-angle high-brightness light sources. It avoids dependence on electrical sensors, and the detection structure is stable and reliable. It is suitable for high-speed online surface quality detection of cold-drawn steel in industrial settings. The device has a reasonable structural design, low cost, and strong anti-interference ability, and has good prospects for promotion and application. Attached Figure Description

[0012] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of the online detection device for micro-defects on the surface of cold-drawn steel according to this utility model; Figure 2 This is a schematic diagram of the cold-drawn steel body under test and the first light source emitting head A of this utility model; Figure 3 This is a partial front view of the present invention; Figure 4 This is a diagram showing the emission of the light source from the reflective optical prism assembly of this utility model. In the diagram: 1. Conveying track; 2. The main body of the cold-drawn steel being inspected; 3. First light source emitter A; 4. Second light source emitter A; 5. Light source emitter B; 6. Reflective optical prism group; 7. Auxiliary light source of the first reflective optical prism group; 8. Auxiliary light source of the second reflective optical prism group; 9. Light source emitter B; 10. Positioning bracket. Detailed Implementation

[0013] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. In the embodiments of the present utility model, the different types of cross-sectional lines are not labeled according to national standards, nor do they specify material requirements for the components; they are used to distinguish the cross-sectional views of the components in the drawings.

[0014] Please see Figure 1-4 An online detection device for micro-defects on the surface of cold-drawn steel includes a conveying track 1 and the cold-drawn steel to be inspected 2. The cold-drawn steel 2 to be tested moves forward along the conveying track 1. Above the cold-drawn steel 2 to be tested, there are a first light source emitting head A3, a second light source emitting head A4, and a light source emitting head B5, which are respectively installed on the adjustable angle positioning bracket 10. The surface of the cold-drawn steel 2 to be tested is irradiated by multi-angle light. The first light source emitter A3 and the second light source emitter A4 are respectively paired with the light source emitter B5 to adjust the beam divergence angle and intensity to achieve uniform illumination; A reflective optical prism group 6 is set outside the detection area of ​​the cold-drawn steel 2 to collect the reflected light signal formed after irradiation and guide it to the imaging window.

[0015] Among them, the roller guide assembly is symmetrically arranged on the left and right sides of the conveying track 1, and each group includes at least two rollers to control the stable position of the cold-drawn steel 2 being tested in the lateral and vertical directions.

[0016] The imaging window presents an image of the cold-drawn steel surface through a high-resolution physical imaging lens or observation window, which facilitates manual identification or subsequent analysis.

[0017] Among them, a coarse filter and a light shield are provided between the light source emission paths to filter ambient light interference and suppress stray light, respectively.

[0018] Among them, the reflective optical prism group 6 emits the first reflective optical prism group auxiliary light source 7 and the second reflective optical prism group auxiliary light source 8 in two directions respectively.

[0019] Among them, the light source emitter B5 emits the light source emitter B light source 9.

[0020] It should be noted that the device of the present invention mainly utilizes the difference between diffuse reflection and specular reflection formed by multi-angle physical light sources and the surface of cold-drawn steel, combined with prisms and light guide structures to amplify micro-defect signals for identification.

[0021] The cold-drawn steel 2 being tested moves steadily forward along the conveyor track 1, ensuring that the cold-drawn steel remains stable during transmission and preventing fluctuations from affecting the accuracy of the test.

[0022] The first light source emitter A3, the second light source emitter A4, and the light source emitter B5 are arranged above, below, and obliquely to the cold-drawn steel to form multi-angle illumination. The light source uses high-brightness white light or laser stripe projection, which can create areas of alternating light and shadow on the surface. Once there are micro-defects such as scratches, cracks, or pits on the steel surface, the reflection angle and intensity of the illumination light will change significantly.

[0023] An anomalous reflection area is captured by a reflective optical prism group 6. This prism group can recombine reflected light from different angles into a clear image and project it onto an imaging window. This window is connected to a physical imaging system, such as a high-resolution optical lens, or can be observed directly through a manual monitoring window.

[0024] If surface defects exist, light will create obvious shadow boundaries, bright area distortion, or reflection blind spots at the defect edges. Operators or back-end image processing systems can quickly identify abnormal signals and determine defects.

[0025] Overall, this invention is based on physical detection methods, has a simple and stable structure, is easy to deploy in industrial settings, and is particularly suitable for continuous detection of surface defects that are difficult to detect by traditional methods, such as microcracks and minor scratches. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0026] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An online detection device for micro-defects on the surface of cold-drawn steel, comprising a conveying track (1) and cold-drawn steel to be detected (2), characterized in that, The cold-drawn steel (2) to be tested moves along the conveying track (1). Above the cold-drawn steel (2) to be tested, there are a first light source emitting head A (3), a second light source emitting head A (4), and a light source emitting head B (5), which are respectively installed on the positioning bracket (10) with adjustable angle, and the surface of the cold-drawn steel (2) to be tested is irradiated by multi-angle light. The first light source emitter A (3) and the second light source emitter A (4) are respectively matched with the light source emitter B (5) to adjust the beam divergence angle and intensity to achieve uniform illumination; A reflective optical prism group (6) is set outside the detection area of ​​the cold-drawn steel (2) to collect the reflected light signal formed after irradiation and guide it to the imaging window.

2. The online detection device for micro-defects on the surface of cold-drawn steel according to claim 1, characterized in that: The roller guide assembly is symmetrically arranged on the left and right sides of the conveying track (1), and each set includes at least two rollers to control the stable position of the cold-drawn steel (2) being tested in the lateral and vertical directions.

3. The online detection device for micro-defects on the surface of cold-drawn steel according to claim 1, characterized in that: The imaging window presents an image of the cold-drawn steel surface through a high-resolution physical imaging lens or observation window, facilitating manual identification or subsequent analysis.

4. The online detection device for micro-defects on the surface of cold-drawn steel according to claim 1, characterized in that: A coarse filter and a light shield are provided between the light source emission paths to filter ambient light interference and suppress stray light, respectively.

5. The online detection device for micro-defects on the surface of cold-drawn steel according to claim 1, characterized in that: The reflective optical prism group (6) emits the first reflective optical prism group auxiliary light source (7) and the second reflective optical prism group auxiliary light source (8) in two directions respectively.

6. The online detection device for micro-defects on the surface of cold-drawn steel according to claim 1, characterized in that: The light source emitter B (5) emits the light source B light source (9).

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