A steel surface defect detection device

Abstract

The application discloses a kind of steel surface defect detection devices, including detection device ontology;Balancing frame is set on detection device ontology;Light source is set on balancing frame;Supporting assembly is set on the side of balancing frame, supporting assembly includes support fixed link, contact wheel and support shaft, support fixed link is fixedly connected with balancing frame, contact wheel is connected with support fixed link by support shaft;Level is set on balancing frame.The steel surface defect detection device of the application is set through corresponding mechanism, so that the detection component can be adapted to the state change in the process of steel conveying, so that the industrial camera, light source component and the relative position relationship between the steel surface remain stable, reduce the detection distance and the change of irradiation angle caused by the difference in steel thickness, conveying fluctuation and equipment installation error, improve the stability of defect image acquisition and the accuracy and reliability of steel surface defect detection.

Description

Technical Field

[0001] This invention belongs to the technical field of defect detection devices, and specifically relates to a steel surface defect detection device. Background Technology

[0002] With the continuous improvement of the level of automation in the steel processing industry, online detection of steel surface defects using optical inspection methods has become an important technical means for steel quality control. Existing steel surface defect detection devices usually use industrial cameras and light source components to collect images of the steel surface during the transportation process, and determine whether there are defects such as cracks, scratches, pits, and oxide scale on the steel surface based on the collected images.

[0003] In actual testing, to ensure image acquisition quality, industrial cameras and light source components usually need to maintain a relatively stable positional relationship with the steel surface. However, due to factors such as processing errors, plate thickness differences, conveyor roller installation accuracy, and equipment assembly errors during the steel transport process, the relative height and angle between the steel inspection surface and the inspection components are prone to change.

[0004] When the detection distance or relative orientation between the detection component and the steel surface changes, it will cause changes in the camera imaging range, the area illuminated by the light source, and the distribution of reflected light on the steel surface, thereby affecting the stable acquisition of defect images and reducing the reliability of the detection results.

[0005] In the prior art, some detection devices adapt to different detection conditions by fixing the detection components or manually adjusting their positions. However, these methods are difficult to maintain a stable relative relationship between the detection components and the steel surface in real time during continuous detection. This is especially true when there are local height changes or changes in the detection reference during steel transportation, which can easily lead to a decrease in detection accuracy.

[0006] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a steel surface defect detection device.

[0007] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0008] The purpose of this invention is to provide a steel surface defect detection device that can solve the problem that the relative height and posture between the detection component and the steel surface are difficult to maintain in the existing steel surface defect detection process, which leads to changes in optical detection conditions and affects the accuracy of defect detection.

[0009] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution:

[0010] A steel surface defect detection device includes: a detection device body; a balancing frame disposed on the detection device body; a light source disposed on the balancing frame; a support assembly disposed on one side of the balancing frame, the support assembly including a support fixing rod, a contact wheel, and a support shaft, the support fixing rod being fixedly connected to the balancing frame, and the contact wheel being connected to the support fixing rod via the support shaft; a level disposed on the balancing frame; and a control mechanism disposed between the detection device body and the balancing frame, the control mechanism including a connecting assembly, a power assembly, and a balancing rod, the connecting assembly being connected to the balancing frame, the power assembly being connected to the connecting assembly, and the balancing rod being connected to the connecting assembly.

[0011] In one or more embodiments of the present invention, two support shafts are provided, each located on one side of the contact wheel and connected to the support fixing rod. By providing support shafts on both sides of the contact wheel, the stability of the contact wheel after installation can be improved, ensuring stable rotation of the contact wheel when in contact with the steel surface and moving with the steel, avoiding displacement of the contact wheel due to unilateral support, and improving the reliability of the support assembly during operation.

[0012] In one or more embodiments of the present invention, the connecting assembly includes a connecting shaft seat, a threaded block, and a first bearing. The connecting shaft seat is rotatably connected to the balance frame, and the threaded block is rotatably connected to the connecting shaft seat via the first bearing. By providing the connecting shaft seat and the first bearing, a rotational fit is formed between the threaded block and the connecting shaft seat. When the threaded block is adjusted in height, the rotational resistance at the connection position can be reduced, while wear between the connecting components is reduced, and the adjustment stability of the control mechanism is improved.

[0013] In one or more embodiments of the present invention, the power assembly includes a threaded rod, an electric motor, and a second bearing. The threaded rod is threadedly connected to the threaded block and passes through the body of the detection device. Through the cooperation of the threaded rod and the threaded block, the rotational motion of the power assembly is converted into the linear motion of the connecting assembly, thereby achieving adjustment of the balancing frame's installation posture. Simultaneously, the threaded transmission structure features high adjustment accuracy and good self-locking performance, improving the stability during the balancing frame adjustment process.

[0014] In one or more embodiments of the present invention, the motor is fixedly mounted on the detection device body, and the output end of the motor is connected to the threaded rod. By fixing the motor to the detection device body, the power output position is kept stable, and the automatic adjustment of the control mechanism is achieved by driving the threaded rod to rotate through the motor, reducing manual adjustment operations and improving the convenience of using the device.

[0015] In one or more embodiments of the present invention, the second bearing is disposed between the threaded rod and the detection device body. By providing the second bearing, the threaded rod can be rotatably supported, keeping it stable during rotation, reducing friction between the threaded rod and the detection device body, improving the smoothness of the power assembly's operation, and extending the service life of related components.

[0016] In one or more embodiments of the present invention, two balance bars are provided, each disposed on one side of the threaded rod and connected to the threaded block. By providing balance bars on both sides of the threaded rod, the movement direction of the threaded block can be restricted, causing the threaded block to move in a predetermined direction, preventing the threaded block from rotating synchronously during the rotation of the threaded rod, and improving the motion stability of the control mechanism.

[0017] In one or more embodiments of the present invention, a third bearing is provided between the balance bar and the threaded block. By providing the third bearing, a stable fit is formed between the balance bar and the threaded block, reducing the frictional resistance between the threaded block and the balance bar during movement, making the lifting and lowering adjustment of the threaded block smoother, and improving the stability of the balance bar in use.

[0018] In one or more embodiments of the present invention, two light sources are provided, each disposed on one side of the balancing frame. By distributing the two light sources on the two sides of the balancing frame, the steel surface can be illuminated from different directions, improving the uniformity of illumination in the defect detection area of ​​the steel surface. Furthermore, when the balancing frame is adjusted, the two light sources can move synchronously with the balancing frame, maintaining the relative positional relationship between the light sources and the steel surface.

[0019] In one or more embodiments of the present invention, the level is fixedly mounted on the balancing frame. By fixing the level on the balancing frame, the level can move synchronously with the balancing frame, thereby reflecting the attitude changes of the balancing frame in real time, providing a reference for the adjustment of the balancing frame, and enabling the balancing frame to maintain a stable detection attitude.

[0020] Compared with the prior art, the steel surface defect detection device of the present invention, through the setting of corresponding mechanisms, enables the detection components to adaptively adjust according to the state changes during the steel transportation process, so that the industrial camera, light source components and steel surface maintain a stable relative position relationship, reduce the changes in detection distance and illumination angle caused by steel thickness differences, transportation fluctuations and equipment installation errors, improve the stability of defect image acquisition and the accuracy and reliability of steel surface defect detection. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of the first part of the steel surface defect detection device in one embodiment of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure at point A in the middle;

[0024] Figure 3 for Figure 1 Schematic diagram of the structure at point B;

[0025] Figure 4 This is a partial three-dimensional sectional view of a steel surface defect detection device according to an embodiment of the present invention;

[0026] Figure 5 for Figure 4 Schematic diagram of the structure at point C;

[0027] Figure 6 This is a perspective view of the second part of the steel surface defect detection device in one embodiment of the present invention;

[0028] Figure 7 This is a perspective view of a steel surface defect detection device according to an embodiment of the present invention.

[0029] Explanation of key figure labels:

[0030] 1-Detection device body, 11-Industrial camera, 2-Balance frame, 3-Light source, 4-Support assembly, 41-Support fixing rod, 42-Contact wheel, 43-Support shaft, 5-Level, 6-Control mechanism, 61-Connecting assembly, 611-Connecting shaft seat, 612-Threaded block, 613-First bearing, 62-Power assembly, 621-Threaded rod, 622-Motor, 623-Second bearing, 63-Balance rod, 631-Third bearing. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0032] like Figures 1 to 7 As shown, a steel surface defect detection device according to an embodiment of the present invention includes: a detection device body 1, a balancing frame 2, a light source 3, a support assembly 4, a level 5, and a control mechanism 6. The balancing frame 2 is disposed on the detection device body 1, the light source 3 is disposed on the balancing frame 2, the support assembly 4 is disposed on one side of the balancing frame 2, the level 5 is disposed on the balancing frame 2, and the control mechanism 6 is disposed between the detection device body 1 and the balancing frame 2.

[0033] The detection device body 1 serves as the basic installation structure for the entire detection device, providing installation support for the balancing frame 2 and the control mechanism 6, enabling the various components of the detection device to form a mutually cooperating overall structure. By connecting the relevant structures through the detection device body 1, the balancing frame 2 can be positioned above the steel detection area, allowing the light source 3, support assembly 4, and level 5, all mounted on the balancing frame 2, to jointly participate in the steel surface detection process.

[0034] The balancing frame 2 serves as the mounting base for the testing components, supporting multiple parts related to the testing process. Since the light source 3, support assembly 4, and level 5 are all mounted on the balancing frame 2, when the balancing frame 2 changes its posture, the various components mounted on it can synchronously change position, maintaining a relatively stable positional relationship between the components. This structural design allows the testing device to adjust the entire testing assembly according to changes in the surface condition of the steel during the steel transport process, preventing large relative positional shifts between the testing components.

[0035] In actual use, the detection device body 1 is first installed in the detection area corresponding to the steel conveying equipment, so that the detection device body 1 is located near the steel conveying path, and the balance frame 2 is located above the steel to be detected. After installation, the position of the detection device body 1 is initially adjusted according to the steel conveying height, so that the contact wheel 42 in the support assembly 4 can maintain contact with the steel surface.

[0036] Once the steel enters the inspection area, the steel conveying equipment is activated, moving the steel along a predetermined conveying direction. Simultaneously, the light source 3, mounted on the balance frame 2, is activated to illuminate the inspection area on the steel surface. After the light source 3 provides illumination, the inspection equipment can acquire images of the steel surface and determine whether defects exist based on the acquired images.

[0037] During continuous steel conveying, the height between the steel surface and the detection components may change due to the steel's processing condition and positional changes during conveying. When a local height change occurs on the steel surface, the contact wheel 42, which is in contact with the steel surface, can move along the steel surface and adjust its position accordingly based on the actual height change of the steel surface.

[0038] Since the contact wheel 42 is mounted on the support rod 41 via the support shaft 43, and the support rod 41 is fixedly connected to the balance frame 2, the positional change of the contact wheel 42 during movement can be transmitted to the balance frame 2 through the support rod 41, so that one side of the balance frame 2 can change its height accordingly with the change of the steel surface.

[0039] When the balancing frame 2 tilts due to the action of the support component 4, the level 5, which is fixedly mounted on the balancing frame 2, can detect the current attitude of the balancing frame 2. Since the level 5 is fixedly connected to the balancing frame 2, the level 5 can directly reflect the attitude change of the balancing frame 2 itself and provide a detection basis for the subsequent control mechanism 6 to adjust the balancing frame 2.

[0040] Based on the changes in the attitude of the balance frame 2 detected by the level 5, the control mechanism 6 can adjust the position of the other side of the balance frame 2, restoring the balance frame 2 to the predetermined detection state. During the adjustment process, the control mechanism 6 provides driving force through the power component 62 and transmits the power to the balance frame 2 through the connecting component 61, thereby realizing the adjustment of the attitude of the balance frame 2.

[0041] Specifically, during the operation of the control mechanism 6, the motor 622 starts and drives the threaded rod 621 to rotate. The threaded rod 621 and the threaded block 612 are connected by a threaded structure. When the threaded rod 621 rotates, the threaded block 612 is restricted by the movement of the balance bar 63. Therefore, the threaded block 612 does not rotate synchronously with the threaded rod 621, but moves along the axial direction of the threaded rod 621 under the action of the threaded rod 621.

[0042] During the movement of the threaded block 612, the height of the balance frame 2 connected to it is changed by the connecting component 61, thereby changing the overall posture of the balance frame 2 and enabling the balance frame 2 to make adaptive adjustments according to the changes in the surface condition of the steel.

[0043] By employing a transmission method between the threaded rod 621 and the threaded block 612, the control mechanism 6 can achieve stable position adjustment. During the adjustment process, the threaded structure can convert the rotational motion generated by the motor 622 into smooth linear motion, making the adjustment process of the balance frame 2 more continuous and reducing the position change error generated during the adjustment process.

[0044] Meanwhile, during the movement of the threaded block 612, the balance bars 63 set on both sides of the threaded rod 621 can restrict the movement direction of the threaded block 612, so that the threaded block 612 always maintains a stable linear motion state, and avoids the threaded block 612 from deflecting during the rotation of the threaded rod 621, thereby ensuring the stability of the adjustment process of the control mechanism 6.

[0045] As the steel is continuously transported, and as the surface condition of the steel changes, the support component 4 can continuously generate corresponding movements according to the changes in the height of the steel surface. The level 5 can continuously detect the posture changes of the balance frame 2. The control mechanism 6 can adjust the balance frame 2 according to the detection results, so that the balance frame 2 always remains in a state suitable for detection work.

[0046] Through the above continuous adjustment process, the light source 3 set on the balance frame 2 can maintain a relatively stable relative position with the steel surface, so that the illumination area will not shift significantly due to changes in the height of the steel surface during the detection process, thereby ensuring the continuity and stability of the steel surface defect detection process.

[0047] like Figure 1 As shown, the balancing frame 2 is mounted on the main body 1 of the detection device. The balancing frame 2 serves as the overall mounting platform for the detection components, connecting and supporting structures such as the light source 3, support components 4, and level 5. In this embodiment, by centrally arranging multiple detection-related structures on the balancing frame 2, each detection component can move and adjust along with the balancing frame 2 as a whole.

[0048] When the balance frame 2 undergoes an attitude change during steel transport, the light source 3, support assembly 4, and level 5 mounted on the balance frame 2 can synchronously change position, maintaining a relatively stable connection between the various structures in the detection device. This design prevents changes in the positional relationship between other detection components and the balance frame 2 due to adjustments to a single detection component, thereby improving consistency during the detection process.

[0049] like Figure 1 As shown, the light source 3 is mounted on the balance frame 2. The light source 3 is used to illuminate the steel inspection area, providing the necessary lighting conditions for the inspection of steel surface defects. During the steel surface defect inspection process, the inspection equipment usually needs to determine the defect status based on the image information of the steel surface, and the lighting conditions will affect the clarity of the inspection image and the representation effect of the defect features.

[0050] Therefore, by placing the light source 3 on the balancing frame 2, the light source 3 can adjust its position synchronously with the balancing frame 2. When the height of the steel surface changes, causing the balancing frame 2 to change its posture, the light source 3 can synchronously change its position, thereby reducing the problem of changes in the distance between the light source 3 and the steel surface caused by changes in the height of the steel surface, and keeping the illumination state in the detection area relatively stable.

[0051] like Figure 1 As shown, there are two light sources 3, which are respectively positioned on both sides of the balance frame 2. By illuminating the steel surface from different directions, the steel inspection area can obtain a more uniform lighting effect.

[0052] During the inspection process, when there are structural changes on the steel surface in different directions, illumination from a single direction may cause some areas to reflect light or be insufficiently illuminated. By setting two light sources 3, the inspection area on the steel surface can be illuminated from different directions at the same time, improving the stability of the light distribution in the inspection area.

[0053] Meanwhile, since both light sources 3 are mounted on the balance frame 2, when the balance frame 2 is adjusted according to the surface condition of the steel, the two light sources 3 can move synchronously, so that the relative positional relationship between the two light sources 3 and the steel surface remains stable, thereby improving the reliability of subsequent detection image acquisition process.

[0054] like Figure 1 and Figure 2 As shown, the support assembly 4 is disposed on one side of the balance frame 2. The support assembly 4 includes a support fixing rod 41, a contact wheel 42, and a support shaft 43. The support fixing rod 41 is fixedly connected to the balance frame 2, so that the support assembly 4 can form a stable connection structure with the balance frame 2.

[0055] The contact wheel 42 is mounted on the support rod 41 via the support shaft 43 and can maintain contact with the steel surface. During the steel conveying process, the contact wheel 42 can roll along the steel surface as the steel moves, allowing the support assembly 4 to reflect the height changes of the steel surface in real time.

[0056] Since steel surface defect detection is usually performed during continuous steel conveying, the detection component needs to maintain a stable relationship with the steel surface. By setting contact wheels 42, the support component 4 can use the steel surface as a detection reference, allowing the balance frame 2 to make corresponding adjustments according to the actual condition of the steel surface.

[0057] like Figure 2 As shown, the support rod 41 is fixedly connected to the balance frame 2. The support rod 41 serves as a connection structure between the contact wheel 42 and the balance frame 2, and is used to transmit the position change of the contact wheel 42 to the balance frame 2.

[0058] When the contact wheel 42 moves along the steel surface, the support rod 41 can withstand the force on the contact wheel 42 and transmit the position change of the contact wheel 42 to the balance frame 2, so that the balance frame 2 can generate a corresponding position change according to the height change of the steel surface.

[0059] Through the above connection method, the support component 4 can not only provide support for the balance frame 2, but also serve as a transmission structure for changes in the surface state of the steel, so that the control mechanism 6 can adjust according to the changes in the posture of the balance frame 2.

[0060] like Figure 2 As shown, the contact wheel 42 is mounted on the support rod 41 via the support shaft 43, allowing the contact wheel 42 to maintain a rolling state during steel conveying. Compared to direct sliding of the contact surface, rolling contact reduces the frictional resistance generated during the contact process, making it easier for the contact wheel 42 to change position during steel movement.

[0061] Meanwhile, by maintaining rolling contact between the contact wheel 42 and the steel surface, the impact on the support assembly 4 during the steel conveying process can be reduced, enabling the support assembly 4 to more stably detect changes in the height of the steel surface.

[0062] like Figure 2 As shown, two support shafts 43 are provided, one on each side of the contact wheel 42 and the other connected to the support fixing rod 41. The two support shafts 43 provide support to both sides of the contact wheel 42, ensuring that the contact wheel 42 remains stable after installation.

[0063] When the contact wheel 42 is subjected to the force of the steel surface, the support shafts 43 on both sides can jointly bear the force on the contact wheel 42, preventing the contact wheel 42 from shifting or shaking due to uneven force, and improving the stability of the contact wheel 42 during operation.

[0064] like Figure 1 As shown, the level 5 is mounted on the balance frame 2 and is fixedly connected to it. Since the level 5 is directly mounted on the balance frame 2, when the balance frame 2 undergoes an attitude change, the level 5 can change synchronously and detect the current tilt state of the balance frame 2.

[0065] The level 5 is used to detect the status of the balance frame 2, so that the control mechanism 6 can adjust the balance frame 2 according to the actual detection results, without having to judge the position status of the balance frame 2 by manual observation, thus improving the automation level of the detection device operation.

[0066] like Figure 1 , Figure 3 and Figure 5 As shown, the control mechanism 6 is located between the detection device body 1 and the balance frame 2. The control mechanism 6 includes a connecting component 61, a power component 62, and a balance bar 63. Through the connection between the control mechanism 6 and the balance frame 2, the control mechanism 6 can adjust the position of the balance frame 2.

[0067] like Figure 3 As shown, the connecting assembly 61 includes a connecting shaft seat 611, a threaded block 612, and a first bearing 613. The connecting shaft seat 611 is connected to the balance frame 2, and the threaded block 612 is disposed inside the connecting shaft seat 611 and forms a rotatable connection with the connecting shaft seat 611 through the first bearing 613.

[0068] By setting the first bearing 613, a stable connection can be maintained between the threaded block 612 and the connecting shaft seat 611, while reducing the resistance generated during the movement of the threaded block 612, so that the connecting assembly 61 can be adjusted in position more smoothly.

[0069] like Figure 3 As shown, the threaded block 612 is connected to the power assembly 62, and the rotational motion generated by the power assembly 62 is converted into linear movement of the threaded block 612 through the threaded structure. When the power assembly 62 is working, the threaded block 612 can move accordingly according to the rotation direction of the threaded rod 621, thereby realizing the position adjustment of the balance frame 2.

[0070] like Figure 4 and Figure 5 As shown, the power assembly 62 includes a threaded rod 621, an electric motor 622, and a second bearing 623. The electric motor 622 is connected to the detection device body 1 and is used to provide driving force and drive the threaded rod 621 to rotate.

[0071] By setting up the power component 62, the position adjustment process of the balance frame 2 can be actively controlled, reducing the position error that may occur during manual adjustment, and making the detection device more suitable for continuous detection processes.

[0072] like Figure 5 As shown, the threaded rod 621 passes through the main body 1 of the detection device and is threadedly connected to the threaded block 612. When the motor 622 drives the threaded rod 621 to rotate, the threaded rod 621 can push the threaded block 612 to move axially, causing the connecting assembly 61 to change in height and driving the balance frame 2 to complete the attitude adjustment.

[0073] like Figure 4 As shown, the second bearing 623 is disposed between the threaded rod 621 and the detection device body 1. The second bearing 623 provides rotational support for the threaded rod 621, enabling the threaded rod 621 to maintain a stable rotational state, reducing the swaying of the threaded rod 621 during rotation, and improving the operational stability of the power assembly 62.

[0074] like Figure 3 and Figure 5 As shown, two balance bars 63 are provided, one on each side of the threaded rod 621 and connected to the connecting assembly 61. The two balance bars 63 restrict the movement direction of the threaded block 612, allowing the threaded block 612 to move in a predetermined direction.

[0075] like Figure 3 As shown, the third bearing 631 is positioned at the connection point between the balance bar 63 and the threaded block 612, creating a stable fit between them. During the movement of the threaded block 612, the third bearing 631 reduces friction between them, ensuring stable movement of the threaded block 612.

[0076] With the above-described structural combination, the steel surface defect detection device in this embodiment can adjust the position of the balance frame 2 according to the changes in the surface condition of the steel during the continuous conveying of steel, so that the light source 3 and the detection equipment can maintain stable detection conditions, thereby improving the stability of the steel surface defect detection process and the consistency of the detection results.

[0077] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0078] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A steel surface defect detection device, characterized in that, include: The detection device body contains an industrial camera. A balancing frame is mounted on the main body of the detection device; The light source is mounted on the balance frame; A support assembly is disposed on one side of the balance frame. The support assembly includes a support fixing rod, a contact wheel, and a support shaft. The support fixing rod is fixedly connected to the balance frame, and the contact wheel is rotatably connected to the support fixing rod through the support shaft. A level is mounted on the balancing frame; A control mechanism is disposed between the detection device body and the balance frame. The control mechanism includes a connecting component, a power component, and a balance bar. The connecting component is rotatably connected to the balance frame, the power component is connected to the connecting component, and the balance bar is connected to the connecting component.

2. The steel surface defect detection device according to claim 1, characterized in that, Two support shafts are provided, which are respectively located on both sides of the contact wheel and connected to the support fixing rod.

3. The steel surface defect detection device according to claim 1, characterized in that, The connecting assembly includes a connecting shaft seat, a threaded block, and a first bearing. The connecting shaft seat is rotatably connected to the balance frame, and the threaded block is rotatably connected to the connecting shaft seat through the first bearing.

4. The steel surface defect detection device according to claim 3, characterized in that, The power assembly includes a threaded rod, an electric motor, and a second bearing. The threaded rod is threadedly connected to the threaded block and passes through the body of the detection device.

5. The steel surface defect detection device according to claim 4, characterized in that, The motor is fixedly mounted on the body of the detection device, and the output end of the motor is connected to the threaded rod.

6. The steel surface defect detection device according to claim 4, characterized in that, The second bearing is disposed between the threaded rod and the detection device body.

7. The steel surface defect detection device according to claim 3, characterized in that, Two balance bars are provided, one on each side of the threaded rod, and the other connected to the threaded block.

8. The steel surface defect detection device according to claim 7, characterized in that, A third bearing is provided between the balance bar and the threaded block.

9. The steel surface defect detection device according to claim 1, characterized in that, There are two light sources, which are respectively located on both sides of the balancing frame.

10. A steel surface defect detection device according to claim 1, characterized in that, The level is fixedly mounted on the balance frame.

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