Method for on-line detection and synchronous repair of surface cracks in non-ferrous metal strip

Abstract

The application discloses a kind of methods for detecting and repairing non-ferrous metal strip surface crack synchronously online, comprising the following steps: system initialization: after system power on, a series of self-checking and calibration operations are performed to ensure that all components are in standby state and initial position; online detection: drive equipment drives the rotation of the reel, and the industrial camera matrix arranged on the lower side of the industrial camera mounting bracket detects the surface crack of the strip passing below; when the online detection result is "crack found", the synchronous mechanism is connected to the main shaft of the drive equipment through the reversing device. Through the multi-level automatic process of detection-repair-reinspection, the traditional mode of relying on manual slow inspection and manual operation during shutdown is replaced. The strip can complete defect identification and processing during high-speed operation without the need to stop or slow down, greatly improving production efficiency while reducing labor intensity, eye strength and skill requirements of workers.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of non-ferrous metal production, in particular to a method for online detection and synchronous repair of surface cracks of non-ferrous metal strip. BACKGROUND

[0002] In the production process of non-ferrous metal strip, such as hot rolling, cold rolling, surface cleaning and heat treatment, the surface quality, especially the edge quality, is the key point of the whole production control. Due to the complex stress state of the edge, especially in the hot rolling and cold rolling processes, surface cracks are very easy to occur. If these cracks cannot be effectively treated, they will further extend and expand in the subsequent tension rolling process, which can easily cause the strip to be torn, broken or even broken, and other serious production accidents. Especially in the cold rolling mill using rolling oil, the broken strip caused by edge cracks at high speed may produce sparks, ignite the rolling oil mist, and cause serious production fire, with huge safety hazards.

[0003] At present, the conventional treatment method for edge cracks in the industry has significant drawbacks. For uniformly distributed edge cracks, a one-time symmetrical edge cutting is usually used for removal. However, the length and distribution of cracks on the strip are often random and uneven. If large-size edge cutting is performed to completely remove individual local large cracks extending to the middle, it will result in a sharp increase in waste and a serious reduction in product yield. If the edge cutting amount is insufficient, micro-cracks cannot be completely removed, which may cause accidents in subsequent production.

[0004] For these uneven and individual micro-cracks, the existing production method mainly relies on the reeling process for treatment. In this process, the reeling machine needs to be operated at a slow speed, and the operator needs to find defects by visual observation under slow speed conditions. Once found, the entire production line needs to be stopped, and then repaired by manual welding or mechanical polishing. This method has the following defects: first, the production efficiency is low, and slow detection and shutdown processing seriously affect the production rhythm; second, the labor intensity of workers is high, and the eyesight requirement is high; third, the treatment quality is unstable, and is greatly affected by human factors, and cannot guarantee the uniformity and reliability of the repair.

[0005] In addition, although online detection systems based on visual sensors have appeared in the prior art, they are mostly limited to the stage of "detection-alarm-shutdown-repair", and cannot form an efficient online closed loop with the repair execution mechanism. If a synchronous scheme driven by a motor and a sensor is used, the control system is complex, and there are problems such as response delay, the need for continuous position correction, and difficulty in ensuring long-term stable synchronization accuracy in a high-speed and vibrating industrial environment. Therefore, we propose a method for online detection and synchronous repair of surface cracks of non-ferrous metal strip. SUMMARY

[0006] The technical problem solved by the present application is to overcome the existing defects and provide a method for online detection and synchronous repair of non-ferrous metal strip surface cracks.

[0007] To achieve the above object, the present application provides the following technical scheme: a method for online detection and synchronous repair of non-ferrous metal strip surface cracks, comprising the following steps:

[0008] S1, system initialization: after the system is powered on, a series of self-checking and calibration operations are performed to ensure that all components are in standby state and initial position;

[0009] S2, online detection: the driving device drives the reel to rotate, and the industrial camera matrix arranged on the lower side of the industrial camera mounting bracket detects the surface cracks of the strip passing below; when the detection result is "no crack found", step S5 or S9 is executed;

[0010] S3, synchronous repair: when the online detection result is "crack found", the synchronous mechanism is connected to the main shaft of the driving device through the reversing device, the driving screw in the fixed frame is driven to rotate forward, the driving screw drives the sliding block to move synchronously along the winding direction of the strip through the thread, and the lower repair device is driven to move synchronously with the surface defects on the strip, and the surface defects of the strip are repaired by the repair device;

[0011] S4, device reset: after the repair is completed, the reset mechanism is connected to the main shaft of the driving device through the reversing device, the driving screw in the fixed frame is driven to rotate reversely, the driving screw drives the sliding block to move reversely along the winding direction of the strip through the thread, and returns to the initial position close to the industrial camera matrix;

[0012] S5, first re-inspection: after the first repair is completed, the second set of industrial camera matrix of the production line detects the surface cracks of the strip passing below for the second time, and when the detection result is "repair success", step S7 or S9 is executed;

[0013] S6, second repair: when the detection result of the first re-inspection is "repair not completed", the second repair device repeats steps S and S for second repair and second reset;

[0014] S7, second re-inspection: after the second repair is completed, the third set of industrial camera matrix detects the surface cracks of the strip passing below for the second time, and when the detection result of the second re-inspection is "repair success", step S9 is executed;

[0015] S8, manual intervention: when the detection result of the secondary re-inspection is "repair not completed", manual intervention is performed: the rewinder is stopped, and the surface crack defects of the repaired strip are manually processed;

[0016] S9, normal operation: when the detection result of the strip is a state without surface crack defects, the system maintains high-speed continuous production and continuously monitors.

[0017] As a preferred technical solution of the present application, the synchronous mechanism comprises a synchronous pulley A installed at the end of the main shaft and a synchronous shaft rotatably arranged on the external mounting frame, one end of the synchronous shaft is provided with a synchronous pulley B, a synchronous belt A is arranged between the synchronous pulley A and the synchronous pulley B, the synchronous shaft is further provided with a synchronous pulley C, the synchronous pulley C is connected with a synchronous belt B and a synchronous pulley D, the synchronous pulley D is connected with a driving shaft rotatably arranged on the external mounting frame, the end of the driving shaft is provided with a driving bevel gear, and the end of the driving screw is provided with a driven bevel gear meshing with the driving bevel gear.

[0018] As a preferred technical solution of the present application, the reset mechanism comprises a driving gear installed at the other end of the synchronous shaft, the driving gear and the driven gear are meshed with each other, the driven gear is fixedly arranged at the end of the reset shaft, the reset shaft is coaxially arranged with the driving shaft, and the end of the reset shaft is also provided with a driving bevel gear meshing with the driven bevel gear.

[0019] As a preferred technical solution of the present application, the reversing device comprises a reversing rod and two synchronizers arranged on the reset shaft and the driving shaft respectively, the reversing rod is inverted "Y" shape, the top end of the reversing rod is hinged with the movable end of the external cylinder, the middle part of the reversing rod is rotatably arranged on the external mounting frame, and the two bottom ends of the reversing rod are hinged with the two synchronizers respectively, and the two driving bevel gears are installed on the driving shaft and the reset shaft through needle bearings respectively.

[0020] As a preferred technical solution of the present application, the inner side surface of the fixing frame is provided with a proximity switch corresponding to the sliding block near the industrial camera mounting frame.

[0021] As a preferred technical solution of the present application, the lower surface of the sliding block is provided with a moving frame, the lower surface of the moving frame is provided with a sliding groove, the side surface of the moving frame is provided with a driving motor, the output shaft of the driving motor penetrates into the sliding groove and is connected with a screw rod through a shaft coupling, the screw rod is rotatably arranged in the sliding groove, and the screw rod is threadedly connected with the screw hole arranged on the side surface of the sliding seat, the moving direction of the sliding seat is perpendicular to the moving direction of the strip, and the repairing device is arranged on the lower side of the sliding seat.

[0022] As a preferred technical solution of the present application, the lower surface of the sliding seat is provided with a lifting device, and the repairing device is arranged on the lower surface of the lifting device.

[0023] As a preferred technical solution of the present application, a rotating speed sensor is arranged on the main shaft.

[0024] As a preferred technical solution of the present application, a camera is further arranged on the repairing device.

[0025] As a preferred technical solution of the present application, the repairing device is one or more of a welding machine, a grinding machine and a cutting machine.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] 1. The multi-stage automatic process of detection-repairing-reinspection replaces the traditional mode of slow manual inspection and manual operation during shutdown. The strip can be identified and processed at high speed without shutdown or speed reduction, greatly improving production efficiency, reducing labor intensity of workers and requirements for eyesight and proficiency.

[0028] 2. The traditional large-size trimming processing mode is abandoned, and specific and individual cracks are accurately positioned and repaired, avoiding the sacrifice of a large amount of intact edge material to remove a few large cracks, reducing waste and improving the product yield of non-ferrous metal strips.

[0029] 3. The repairing device and the strip are synchronously moved by the synchronous mechanism, realizing high synchronization of the repairing device and the strip running speed, without response delay and software correction, and having strong anti-interference ability and high tracking and repairing positioning accuracy in high-speed and vibration environment.

[0030] 4. After repairing, the repairing device can be reset to the initial position by the resetting mechanism. Synchronous movement of repairing and automatic resetting of the device are both powered by the main shaft of the same driving equipment through the reversing device, which not only saves the cost and space of separately setting a driving motor for resetting function, but also realizes automatic resetting of the repairing cycle through pure mechanical transmission, simplifies the system structure, reduces the manufacturing cost and control system complexity, and improves the reliability and response speed of the whole action process. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a method flowchart of the present application;

[0032] Figure 2 is a top view structural schematic diagram of the present application;

[0033] Figure 3 is a front view structural schematic diagram of the present application;

[0034] Figure 4 is a rear view structural schematic diagram of the present application;

[0035] Figure 5 Fig. 1 is a left view schematic diagram of the structure of the present application;

[0036] Figure 6 Fig. 2 is a right view schematic diagram of the structure of the present application.

[0037] In the figure: 1 strip, 2 winding drum, 3 driving device, 4 main shaft, 5 synchronous pulley A, 6 synchronous shaft, 7 synchronous pulley B, 8 synchronous belt A, 9 synchronous pulley C, 10 synchronous pulley D, 11 synchronous belt B, 12 driving shaft, 13 driving gear, 14 driven gear, 15 reset shaft, 16 driving bevel gear, 17 synchronizer, 18 reversing lever, 19 driven bevel gear, 20 driving screw, 21 fixed frame, 22 sliding block, 23 moving frame, 24 driving motor, 25 lifting device, 26 repair device, 27 industrial camera mounting frame. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0039] Please refer to Figures 1-6 The present application provides a technical solution: a method for online detection and synchronous repair of non-ferrous metal strip surface cracks, comprising the following steps:

[0040] S1, system initialization: after the system is powered on, a series of self-checking and calibration operations are performed to ensure that all components are in standby state and initial position. The system control center issues instructions to drive the reset mechanism to work, ensuring that all repair units move along the driving screw 20, return and accurately stop at the initial physical position close to the first industrial camera matrix. The industrial camera matrix images a known reference mark (strip edge or calibration block) to establish a mapping relationship between the image coordinate system and the actual physical position of the strip, ensuring the accuracy of detection positioning. The clarity of the camera field of view and the uniformity of the light are checked, and if there is any abnormality, automatic adjustment or alarm is performed. Check whether the energy supply of the repair device (laser, welding machine, grinder and cutting machine, etc.), medium (protective gas, welding wire, etc.) is in place and the pressure / flow is normal. Then a short "empty load" start test is performed to ensure that the equipment functions normally. Control the reversing device to act, ensure that the synchronization mechanism and the reset mechanism are both disconnected from the driving device main shaft, that is, the reversing device is in the neutral position. Load the defect judgment threshold, repair process parameters (such as power and speed for different cracks), and transmission ratio of synchronous motion, etc. key parameters from the database or preset configuration.

[0041] S2, online detection: the driving device 3 drives the winding drum 2 to rotate, and the industrial camera matrix arranged on the lower side of the industrial camera mounting frame 27 detects the surface cracks of the strip 1 passing below. When the detection result is "no cracks found", step S5 or S9 is executed;

[0042] S3, synchronous repair: when the online detection result is "cracks found", the synchronous mechanism is connected to the main shaft 4 of the driving device 3 through the reversing device, the driving screw 20 in the fixed frame 21 is driven to rotate forward, the driving screw 20 drives the sliding block 22 to move synchronously along the winding direction of the strip 1 through the thread, and the lower repair device 26 is driven to move synchronously with the surface defects on the strip 1, so that the repair device 26 repairs the surface defects of the strip 1.

[0043] S4, device reset: after the repair is completed, the reset mechanism is connected to the main shaft 4 of the driving device 3 through the reversing device, the driving screw 20 in the fixed frame 21 is driven to rotate reversely, the driving screw 20 drives the sliding block 22 to move reversely along the winding direction of the strip 1 through the thread, and returns to the initial position close to the industrial camera matrix.

[0044] S5, first re-inspection: after the first repair is completed, the second set of industrial camera matrix of the production line detects the surface cracks of the strip 1 passing below for the second time, and when the detection result is "repair success", step S7 or S9 is executed.

[0045] S6, second repair: when the detection result of the first re-inspection is "repair not completed", the second repair device 26 repeats steps S3 and S4 for second repair and second reset;

[0046] S7, second re-inspection: after the second repair is completed, the third set of industrial camera matrix of the production line detects the surface cracks of the strip 1 passing below for the second time, and when the detection result of the second re-inspection is "repair success", step S9 is executed.

[0047] S8, manual intervention: when the detection result of the second re-inspection is "repair not completed", manual intervention is performed: the rewinder is stopped, and the surface crack defects of the repaired strip 1 are manually processed.

[0048] S9, normal operation: when the detection result of the strip 1 is no surface crack defect, the system maintains high-speed continuous production and continues to monitor.

[0049] Preferably, the synchronous mechanism comprises a synchronous pulley A5 mounted on the end of the main shaft 4 and a synchronous shaft 6 rotatably arranged on the external mounting frame, the synchronous shaft 6 is arranged obliquely above the winding drum 2, so that the repair device 26 and the like can move, lift and repair above the strip 1.

[0050] One end of the synchronous shaft 6 is provided with a synchronous pulley B7, and a synchronous belt A8 is arranged between the synchronous pulley A5 and the synchronous pulley B7. The driving device 3 drives the synchronous pulley A5 to rotate through the main shaft 4, and the synchronous pulley A5 drives the synchronous pulley B7 and the synchronous shaft 6 to rotate synchronously through the synchronous belt A8.

[0051] The synchronous shaft 6 is further provided with a synchronous pulley C9, the synchronous pulley C9 is connected with a synchronous pulley D10 through a synchronous belt B11, the synchronous pulley D10 is connected with a driving shaft 12 rotatably arranged on the external mounting frame, and the driving shaft 12 and the synchronous shaft 6 are at the same height. The synchronous shaft 6 drives the synchronous pulley C9 to rotate, and the synchronous pulley C9 drives the synchronous pulley D10 and the driving shaft 12 to rotate synchronously through the synchronous belt B11. The transmission ratio of all the synchronous pulleys is 1.

[0052] The end of the driving shaft 12 is provided with a driving bevel gear 16, the end of the driving screw 20 is provided with a driven bevel gear 19 engaged with the driving bevel gear 16, and the driving shaft 12 drives the driven bevel gear 19 to rotate through the driving bevel gear 16, and the driven bevel gear 19 drives the driving screw 20 to rotate synchronously. The transmission ratio of the driving bevel gear 16 and the driven bevel gear 19 is 1. The driving screw 20 drives the sliding block 22 and the repairing device 26 to move forward synchronously with the strip, so as to realize the on-line synchronous movement repairing of the strip.

[0053] The diameters of the driving bevel gear 16 and the driven bevel gear 19, the pitch of the driving screw 20 and the like are designed according to the mathematical relationship established according to the diameter of the winding drum 2, so as to ensure that the sliding block 22 and the strip 1 can keep the same speed under the synchronous rotation of the driving screw 20.

[0054] Preferably, the resetting mechanism comprises a driving gear 13 arranged at the other end of the synchronous shaft 6, the driving gear 13 is engaged with a driven gear 14, the transmission ratio of the driving gear 13 and the driven gear 14 is 1, the driven gear 14 is fixedly arranged at the end of a resetting shaft 15, the resetting shaft 15 is coaxially arranged with the driving shaft 12, and the end of the resetting shaft 15 is also provided with a driving bevel gear 16 engaged with the driven bevel gear 19. When resetting, the driving bevel gear 16 on the driving shaft 12 is no longer rotated with the driving shaft 12 through the reversing device, and the driving bevel gear 16 on the resetting shaft 15 is rotated with the resetting shaft 15, so that the resetting of the repairing device can be realized.

[0055] Preferably, the reversing device comprises a reversing rod 18 and two synchronizers 17 respectively arranged on the reset shaft 15 and the driving shaft 12, the synchronizer 17 is a common synchronizer structure comprising a coupling sleeve and a synchronizer ring, etc. The reversing rod 18 is inverted "Y" shape, the top end of the reversing rod 18 is hinged to the movable end of the external cylinder, the middle part of the reversing rod 18 is rotatably arranged on the external mounting frame, and the two bottom ends of the reversing rod 18 are respectively hinged to the two synchronizers 17. The two driving bevel gears 16 are respectively installed on the driving shaft 12 and the reset shaft 15 through needle bearings. After the corresponding coupling sleeve moves to the position engaged with the driving bevel gear 16, the synchronizer ring is pressed to the inner side of the corresponding driving bevel gear 16, so as to realize synchronous rotation.

[0056] Further preferably, the inner side surface of the fixing frame 21 is provided with a proximity switch corresponding to the sliding block 22 near the industrial camera mounting frame 27, which is used to detect whether the repairing device 26 is reset to the position. After detecting that it is reset to the initial position, the external cylinder drives the reversing rod 18 to move to the neutral position through automatic control of the system.

[0057] Preferably, the lower surface of the sliding block 22 is provided with a moving frame 23, the lower surface of the moving frame 23 is provided with a sliding groove, the side surface of the moving frame 23 is provided with a driving motor 24, the output shaft of the driving motor 24 penetrates into the sliding groove and is connected with a screw rod through a shaft coupling, the screw rod is rotatably arranged in the sliding groove, and the screw rod is threadedly connected with the screw hole provided in the side surface of the sliding seat. The moving direction of the sliding seat is perpendicular to the moving direction of the strip 1. The repairing device 26 is arranged on the lower side of the sliding seat. The lower surface of the sliding seat is provided with a lifting device 25, which is preferably a cylinder or an oil cylinder or an electric push rod, etc. The repairing device 26 is arranged on the lower surface of the lifting device 25. The sliding seat and the repairing device 26 can be moved in the Y-axis direction through the driving motor 24 and the screw rod, the repairing device 26 can be moved up and down in the Z-axis direction through the lifting device 25, and the repairing device 26 can be moved synchronously with the strip 1 in the X-axis direction through the synchronous mechanism, so as to realize the forward, backward, left, right and upward movement of the repairing device 26, and then accurately and flexibly move to the corresponding position and repair according to the detected position of the surface crack defect of the strip. The movement of the Y-axis and the lifting of the Z-axis can be adjusted in place during synchronous movement, which does not affect the synchronous movement with the defect position.

[0058] Preferably, the main shaft 4 is provided with a rotating speed sensor for detecting the rotating speed of the main shaft 4, so as to judge the moving speed of each component in the synchronous mechanism. According to the distance between the industrial camera matrix and the initial position of the repairing device 26, the synchronous movement can be delayed for a corresponding time, so as to achieve accurate synchronous movement and repair.

[0059] In addition, the repairing device can also be started immediately after the surface defects are found, and delayed for a small distance after the corresponding length is repaired to ensure full coverage of the defect area.

[0060] Further preferred technical solutions, the repairing device 26 is also provided with a camera, which can shoot the surface defect picture and repair picture of the strip 1 during synchronous movement and transmit to the monitoring room for observation by the staff, and manually intervene in the repair in the case of necessity to improve the repair effect of the crack defects.

[0061] Optionally, when the diameter of the coiled strip is large, a telescopic friction wheel can be arranged at the winding drum to always contact the outermost surface of the coiled strip, and the friction wheel is coupled with the synchronous shaft 6 through a differential. The rotation speed of the friction wheel will linearly decrease with the increase of the winding drum radius, and the final input rotation speed of the synchronous mechanism can compensate for the linear speed change caused by the increase of the radius. A mechanical stepless speed changer can also be used, and the speed control lever of the mechanical stepless speed changer is linked with an arm that always presses the surface of the coiled strip. As the radius of the coiled strip increases, the arm swings to automatically adjust the transmission ratio of the speed changer, thereby changing the final output speed of the synchronous mechanism to mechanically correct the synchronous speed of the synchronous mechanism when the coiled strip is wound at a large diameter.

[0062] Preferably, the repairing device 26 is one or more of a welding machine, a grinder and a cutting machine, which can repair the crack defects by welding, grinding and cutting respectively according to the specific conditions of the crack defects. For superficial micro-cracks, a high-speed grinder can be used for local grinding to remove the cracks and form a smooth transition in the area to eliminate stress concentration points. For linear cracks with a certain depth, a micro welding machine (such as TIG welding or laser welding) can be used for fusion repair to achieve metallurgical bonding and restore material integrity. For macro cracks that have expanded or serious defects that cannot be repaired, a precision cutting machine or a small milling device can be used to cut off the small section of the edge to avoid the expansion of the defects in the subsequent production.

[0063] In addition, laser preheating + micro forging can also be used for repair. First, a low-power laser is used to instantaneously preheat the micro crack area to soften the material. Then, a high-precision electromagnetic drive or pneumatic impact head is used to micro forge the crack to “rivet” the crack and achieve metallurgical bonding.

[0064] The driving device 3, the driving motor 24, the industrial camera, the air cylinder, the oil cylinder, the electric push rod, the proximity switch, the rotation speed sensor, the camera, the welding machine, the grinder and the cutting machine used in the present application are all powered by an external power source and controlled by a controller such as a PLC controller or a single-chip microcomputer in an external control system. The above-mentioned devices are all common electronic components in the prior art, and their specific structure, working principle, control mode and circuit connection are all known technologies, which will not be described in detail here.

[0065] The parts not disclosed in the present application are all prior art, and their specific structure, material and working principle are not described in detail. Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for online detection and simultaneous repair of surface cracks in non-ferrous metal strips, characterized in that, Includes the following steps: S1. System Initialization: After the system is powered on, a series of self-test and calibration operations are performed to ensure that all components are in standby and initial positions. S2. Online inspection: The driving device (3) drives the drum (2) to rotate and roll the strip (1). The industrial camera matrix set on the lower side of the industrial camera mounting bracket (27) inspects the surface cracks of the strip (1) passing below. When the inspection result is "no cracks found", step S5 or S9 is executed. S3, Synchronous Repair: When the online detection result is "crack found", the synchronous mechanism is connected to the main shaft (4) of the drive device (3) through the reversing device. The synchronous mechanism drives the drive screw (20) in the fixed frame (21) to rotate in the forward direction. The drive screw (20) drives the slider (22) to move synchronously along the coil direction of the strip (1) through the thread, and drives the repair device (26) on the lower side to move synchronously with the surface defect on the strip (1). The repair device (26) repairs the surface defect of the strip (1) accordingly. The synchronous mechanism includes a synchronous pulley A (5) installed at the end of the main shaft (4) and a synchronous shaft (6) rotatably set on the external mounting frame. A synchronous pulley B (7) is installed at one end of the synchronous shaft (6). A synchronous belt A (8) is set between the synchronous pulley A (5) and the synchronous pulley B (7). A synchronous pulley C (9) is also installed on the synchronous shaft (6). The stepping pulley C (9) is connected to the synchronous belt B (11) and the synchronous pulley D (10). The synchronous pulley D (10) is connected to the drive shaft (12) which is rotatably mounted on the external mounting frame. The end of the drive shaft (12) is provided with a driving bevel gear (16), and the end of the drive screw (20) is provided with a driven bevel gear (19) that meshes with the driving bevel gear (16). The reversing device includes a reversing rod (18) and two synchronizers (17) respectively mounted on the reset shaft (15) and the drive shaft (12). The reversing rod (18) is an inverted "Y" shape. The top of the reversing rod (18) is hinged to the movable end of the external cylinder. The middle part of the reversing rod (18) is rotatably mounted on the external mounting frame, and the two bottom ends of the reversing rod (18) are respectively hinged to the two synchronizers (17). The two driving bevel gears (16) are respectively mounted on the drive shaft (12) and the reset shaft (15) through needle roller bearings. S4. Device Reset: After the repair is completed, the reset mechanism is connected to the main shaft (4) of the drive device (3) through the reversing device. The reset mechanism drives the drive screw (20) in the fixed frame (21) to rotate in the opposite direction. The drive screw (20) drives the slider (22) to move in the opposite direction along the coil direction of the strip (1) through the thread, and returns to the initial position close to the industrial camera matrix. The reset mechanism includes a drive gear (13) installed at the other end of the synchronous shaft (6). The drive gear (13) meshes with the driven gear (14). The driven gear (14) is fixedly set at the end of the reset shaft (15). The reset shaft (15) is coaxially set with the drive shaft (12), and the end of the reset shaft (15) is also provided with a drive bevel gear (16) that meshes with the driven bevel gear (19). S5. First inspection: After the first repair is completed, the surface cracks of the strip (1) passing below are inspected again by the second set of industrial camera matrix on the production line. When the inspection result is "repair successful", step S7 or S9 is executed. S6. Secondary repair: When the result of the first re-inspection is "repair not completed", the second repair device (26) repeats steps S3 and S4 to perform secondary repair and secondary reset. S7. Secondary inspection: After the secondary repair is completed, the surface cracks of the strip (1) below are re-inspected by the third set of industrial camera matrix. When the result of the secondary inspection is "repair successful", step S9 is executed. S8. Manual intervention: When the result of the second re-inspection is "repair not completed", manual intervention is carried out: the rewinding machine is stopped and the surface crack defects of the strip (1) are manually repaired. S9. Normal operation: When the test result of the strip (1) shows no surface crack defects, the system maintains high-speed continuous production and continuous monitoring.

2. The method for online detection and simultaneous repair of surface cracks in non-ferrous metal strips according to claim 1, characterized in that: The inner surface of the mounting bracket (21) near the industrial camera mounting bracket (27) is provided with a proximity switch corresponding to the slider (22).

3. The method for online detection and simultaneous repair of surface cracks in non-ferrous metal strips according to claim 1, characterized in that: The lower surface of the slider (22) is equipped with a movable frame (23), the lower surface of the movable frame (23) is provided with a sliding groove, the side surface of the movable frame (23) is equipped with a drive motor (24), the output shaft of the drive motor (24) passes into the sliding groove and is connected to the screw through a coupling, the screw is rotated in the sliding groove, and the screw is threadedly connected to the screw hole opened on the side surface of the sliding seat. The moving direction of the sliding seat is perpendicular to the moving direction of the strip (1), and the repair device (26) is set on the lower side of the sliding seat.

4. The method for online detection and simultaneous repair of surface cracks in non-ferrous metal strips according to claim 3, characterized in that: A lifting device (25) is installed on the lower surface of the sliding seat, and a repair device (26) is installed on the lower surface of the lifting device (25).

5. The method for online detection and simultaneous repair of surface cracks in non-ferrous metal strips according to claim 1, characterized in that: A speed sensor is provided on the main shaft (4).

6. The method for online detection and simultaneous repair of surface cracks in non-ferrous metal strips according to claim 1, characterized in that: The repair device (26) is also equipped with a camera.

7. The method for online detection and simultaneous repair of surface cracks in non-ferrous metal strips according to claim 1, characterized in that: The repair device (26) is one or more of a welding machine, a grinding machine and a cutting machine.

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