An on-line non-destructive testing device for special transformer core silicon steel sheets

Abstract

The application discloses a kind of online nondestructive testing devices for special transformer core silicon steel sheet, including base, the inside of the base is provided with a plurality of conveying mechanism, the inside of the base is provided with straightening mechanism, the inside of the base is fixedly connected with two mounting plates, the opposite side of two The mounting plate is equipped with camera, the inside of the base is installed with silicon steel sheet online magnetic property measuring equipment, the inside of the base is provided with defect marking system, the front of the base is installed with control camera and the on-off single-chip microcomputer of silicon steel sheet online magnetic property measuring equipment, the output of the silicon steel sheet online magnetic property measuring equipment is connected with single-chip microcomputer signal.The application can forcibly eliminate the original uneven internal stress and plate shape defect of silicon steel sheet, realize straightening and stress leveling, effectively avoid the uneven stress and uneven condition of silicon steel sheet, improve the quality of silicon steel sheet surface defect detection and magnetic property defect detection.

Description

Technical Field

[0001] This invention relates to the field of nondestructive testing equipment technology, and more specifically, to an online nondestructive testing device for silicon steel sheets in the core of special transformers. Background Technology

[0002] The online non-destructive testing device for silicon steel sheets used in special transformer cores is an automated system integrating multiple advanced sensing technologies and data analysis algorithms. It aims to evaluate key performance indicators of silicon steel sheets in real-time and non-destructively during punching, shearing, stacking, and heat treatment processes, ensuring efficient and low-loss operation of the transformer core. This type of device is a core component of modern smart factories and quality control systems.

[0003] Before processing, the silicon steel sheets for special transformer cores need to be inspected. This inspection includes surface defect detection and magnetic property testing using online magnetic property measurement equipment. This avoids further processing of unqualified sheets, improving yield and reducing energy consumption. However, during inspection, silicon steel sheets are prone to defects such as curling, warping, and waviness. These defects cause optical distortion, uneven reflection, and obstruction, affecting the effectiveness of surface defect detection and leading to missed or false detections. Furthermore, silicon steel sheets are prone to uneven stress, which significantly increases iron loss and reduces permeability. This results in online magnetic measurement results that do not accurately reflect the material's intrinsic properties. Moreover, after detecting surface or magnetic defects, their locations cannot be clearly marked, hindering subsequent processing of the silicon steel sheets. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention aims to provide an online non-destructive testing device for silicon steel sheets in special transformer cores, which solves the technical problems of low testing quality due to plate shape defects and uneven stress during silicon steel sheet testing, as well as the inability to intuitively mark the location of defects.

[0005] To solve the above problems, the present invention adopts the following technical solution;

[0006] An online non-destructive testing device for silicon steel sheets in special transformer cores includes a base, with multiple conveying mechanisms and a straightening mechanism disposed on the inner side of the base. Two mounting plates are fixedly connected to the inner side of the base, and cameras are mounted on opposite sides of the two mounting plates. An online magnetic property measuring device for silicon steel sheets is mounted on the inner side of the base, and a defect marking system is disposed on the inner side of the base. A microcontroller for controlling the opening and closing of the camera and the online magnetic property measuring device for silicon steel sheets is mounted on the front of the base, and the output terminal of the online magnetic property measuring device for silicon steel sheets is connected to the microcontroller for signal transmission.

[0007] As a further description of the above technical solution:

[0008] The straightening mechanism includes four fixed rollers, both ends of which are fixedly connected to the inner side of the base. The four fixed rollers are arranged in an S-shape, and each of the four fixed rollers is fitted with a rotating sleeve that is rotatably connected to it.

[0009] As a further description of the above technical solution:

[0010] The conveying mechanism includes two conveying rollers, both ends of which are rotatably connected to the inner side of the base. Two motors are fixedly connected to the front of the base, and the output shafts of the two motors pass through the base and are fixedly connected to the two conveying rollers respectively.

[0011] As a further description of the above technical solution:

[0012] The defect marking system includes an inkjet printer mounted on the inner side of the base, located on the left side of the online magnetic property measurement device for silicon steel sheets. The microcontroller integrates a comparison module and a position calculation module. An encoder is mounted on the back of the base, its input shaft passing through the base and fixedly connected to the conveyor roller. The encoder's output is signal-connected to the position calculation module, which in turn is bidirectionally signal-connected to the comparison module. The comparison module's output is signal-connected to the microcontroller, and the microcontroller's output is signal-connected to both the position calculation module and the inkjet printer.

[0013] As a further description of the above technical solution:

[0014] The base has air inlet pipes that are fixedly connected to both the front and back sides. A fan is installed at the opposite ends of the two air inlet pipes, and nozzles arranged at equal intervals are connected to the opposite sides of the two air inlet pipes.

[0015] As a further description of the above technical solution:

[0016] The air inlet of the fan is fixedly connected to an air intake pipe. The end of the air intake pipe away from the fan is fixedly connected to the base. Two air intake slots are opened on the front and back of the base. One end of the air intake pipe is connected to the air intake slot. A filter plate is slidably connected to one side of the air intake pipe.

[0017] As a further description of the above technical solution:

[0018] The microcontroller integrates an energy-saving and efficiency-enhancing module, and the output of the energy-saving and efficiency-enhancing module is connected to the signal of the comparison module.

[0019] Compared with the prior art, the advantages of this invention are:

[0020] During the conveying process, the silicon steel sheet is guided by a rotating sleeve connected to a fixed roller, causing the silicon steel sheet to bend and deform repeatedly. Then, the silicon steel sheet is output from two conveying rollers and leveled by the conveying rollers. During this process, alternating stress exceeding its yield strength is generated inside the material, thereby forcibly eliminating its original uneven internal stress and plate shape defects, achieving straightening and stress flattening. This effectively avoids uneven stress and unevenness in the silicon steel sheet, and improves the quality of surface defect detection and magnetic property defect detection of the silicon steel sheet.

[0021] The location of defects in silicon steel sheets can be marked, so that the location of defects can be accurately known during subsequent processing of silicon steel sheets. This makes it easier to remove defective parts and improves the practicality of the equipment.

[0022] This allows online magnetic property measurement equipment for silicon steel sheets to skip the parts of the silicon steel sheets with surface defects during magnetic property testing, thereby saving energy consumption for detecting silicon steel sheets with surface defects and saving time required for magnetic attraction detection, thus improving the practicality of the device. Attached Figure Description

[0023] Figure 1 This is one of the perspective views of the present invention;

[0024] Figure 2 This is a second perspective view of the present invention;

[0025] Figure 3 This is a third perspective view of the present invention;

[0026] Figure 4 This is the fourth perspective view of the present invention;

[0027] Figure 5 This is a cross-sectional view of the present invention;

[0028] Figure 6 For the present invention Figure 5 Enlarged view of section A;

[0029] Figure 7 This is a schematic diagram of the present invention;

[0030] Figure 8 This is a schematic diagram of the defect marking system in this invention.

[0031] Explanation of the labels in the diagram:

[0032] 1. Base; 2. Conveying mechanism; 201. Conveying roller; 202. Motor; 3. Straightening mechanism; 301. Fixed roller; 302. Rotating sleeve; 4. Mounting plate; 5. Camera; 6. Online magnetic property measurement equipment for silicon steel sheets; 7. Defect marking system; 701. Inkjet printer; 702. Comparison module; 703. Position calculation module; 704. Encoder; 8. Microcontroller; 9. Air inlet pipe; 10. Fan; 11. Nozzle; 12. Suction pipe; 13. Suction groove; 14. Filter plate; 15. Energy saving and efficiency improvement module. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] Please see Figure 1-8 This invention discloses an online non-destructive testing device for silicon steel sheets in special transformer cores. The device includes a base 1, with multiple conveying mechanisms 2 and a straightening mechanism 3 located inside the base 1. Two mounting plates 4 are fixedly connected to the inside of the base 1, and cameras 5 are mounted on opposite sides of each mounting plate 4. An online magnetic property measuring device 6 for silicon steel sheets is mounted inside the base 1, and a defect marking system 7 is located inside the base 1. A microcontroller 8, controlling the opening and closing of the cameras 5 and the online magnetic property measuring device 6, is mounted on the front of the base 1. The online magnetic property measuring device for silicon steel sheets... The output end of the measuring device 6 is connected to the microcontroller 8 via signal; the straightening mechanism 3 includes four fixed rollers 301, both ends of which are fixedly connected to the inner side of the base 1. The four fixed rollers 301 are arranged in an S-shape, and each of the four fixed rollers 301 is fitted with a rotating sleeve 302 that is rotatably connected to it; the conveying mechanism 2 includes two conveying rollers 201, both ends of which are rotatably connected to the inner side of the base 1. Two motors 202 are fixedly connected to the front of the base 1. The output shafts of the two motors 202 pass through the base 1 and are fixedly connected to the two conveying rollers 201 respectively.

[0035] In this invention, when inspecting silicon steel sheets for special transformer cores, the silicon steel sheets are first uncoiled using an uncoiler. Then, one end of the silicon steel sheet passes sequentially between multiple sets of conveying rollers 201. During the process, the silicon steel sheet passes sequentially through the bottom of the S-shaped fixed rollers 301, two cameras 5, the online magnetic property measuring device 6 for silicon steel sheets, and the defect marking system 7. After all the motors 202 are turned on, they will drive the conveying rollers 201 to rotate, and the conveying rollers 201 will drive the silicon steel sheet to be conveyed to the left.

[0036] When the silicon steel sheet passes between the two cameras 5, the two cameras 5 will simultaneously capture images of both sides of the silicon steel sheet. The cameras 5 will transmit the image information to the computer. The computer software will analyze the image information and determine whether there are defects on the surface of the silicon steel sheet, thereby realizing the detection of defects on the surface of the silicon steel sheet.

[0037] When the silicon steel sheet passes through the online magnetic property measuring device 6, the system inside the device 6 will detect the magnetic properties of the silicon steel sheet.

[0038] When performing surface defect detection and magnetic property testing, the silicon steel sheets are affected by uneven stress and flatness due to the early processes such as transportation and rolling. This affects the effectiveness of surface defect detection and magnetic property defect detection. To solve this problem, the present invention provides Embodiment 1:

[0039] Before surface and magnetic property testing, the silicon steel sheet passes through S-shaped fixed rollers 301. During this process, the silicon steel sheet is guided by a rotating sleeve 302 connected to the fixed rollers 301, causing the silicon steel sheet to bend and deform repeatedly. Then, the silicon steel sheet is output from two conveying rollers 201 and leveled by the conveying rollers 201. In this process, alternating stress exceeding its yield strength is generated inside the material, thereby forcibly eliminating its original uneven internal stress and plate shape defects, achieving straightening and stress flattening. This effectively avoids uneven stress and unevenness in the silicon steel sheet, improving the quality of surface defect detection and magnetic property defect detection.

[0040] After detecting defects on the surface or in the magnetic properties of the silicon steel sheet, in order to facilitate the rapid removal of defective areas during subsequent processing of the silicon steel sheet, this invention provides Embodiment Two:

[0041] Please see Figure 1-8 The defect marking system 7 includes an inkjet printer 701, which is installed on the inside of the base 1 and located on the left side of the online magnetic property measuring device 6 for silicon steel sheets. The microcontroller 8 integrates a comparison module 702 and a position calculation module 703. An encoder 704 is installed on the back of the base 1. The input shaft of the encoder 704 passes through the base 1 and is fixedly connected to the conveyor roller 201. The output end of the encoder 704 is connected to the position calculation module 703. The position calculation module 703 is bidirectionally connected to the comparison module 702. The output end of the comparison module 702 is connected to the microcontroller 8. The output end of the microcontroller 8 is connected to both the position calculation module 703 and the inkjet printer 701.

[0042] In this invention, after the image information acquired by camera 5 is detected as defective by computer software, the computer software sends a surface defect signal to microcontroller 8. At this time, microcontroller 8 sends a surface defect signal to position calculation module 703. Position calculation module 703 then starts receiving data collected by encoder 704. Encoder 704 records the number of rotations of conveyor roller 201. Position calculation module 703 can calculate the length of the defective part of silicon steel sheet conveyed to the left by conveyor roller 201 based on the number of rotations of conveyor roller 201. During this process, comparison module 702 compares the calculated length with the distance data between camera 5 and inkjet printer 701. If the data are the same, it means that the defective part of silicon steel sheet has moved below inkjet printer 701. At this time, comparison module 702 sends a surface defect signal to microcontroller 8, and microcontroller 8 controls inkjet printer 701 to print surface defect marks at the location of surface defect on silicon steel sheet.

[0043] Similarly, after the online magnetic property measuring device 6 of silicon steel sheet completes the magnetic property detection of silicon steel sheet, if a defect is found, it will send a magnetic property defect signal to the microcontroller 8. The microcontroller 8 will then send a magnetic property defect signal to the position calculation module 703. The position calculation module 703 will then start receiving data collected by the encoder 704. The position calculation module 703 calculates the length of the defective part of the silicon steel sheet that is conveyed to the left by the conveying roller 201. The comparison module 702 will compare the calculated length with the distance data between the online magnetic property measuring device 6 of silicon steel sheet and the inkjet printer 701. If the data are the same, it means that the part of the silicon steel sheet with magnetic property defect has moved below the inkjet printer 701. At this time, the comparison module 702 will send a magnetic property defect signal to the microcontroller 8, and the microcontroller 8 will control the inkjet printer 701 to spray ink to mark the magnetic property defect at the location of the magnetic property defect on the silicon steel sheet.

[0044] When processing silicon steel sheets later, the location of defects can be accurately identified, making it easier to remove defective parts and improve the practicality of the equipment.

[0045] Please see Figure 1-6 The base 1 has air inlet pipes 9 fixedly connected to both its front and back sides. Fans 10 are installed at opposite ends of the two air inlet pipes 9. Spray nozzles 11 are connected to opposite sides of the two air inlet pipes 9 at equal intervals. The air inlet of the fan 10 is fixedly connected to the suction pipe 12. The end of the suction pipe 12 away from the fan 10 is fixedly connected to the base 1. Two suction slots 13 are opened on both the front and back sides of the base 1. One end of the suction pipe 12 is connected to the suction slot 13. A filter plate 14 is slidably connected to one side of the suction pipe 12.

[0046] In this invention, when the silicon steel sheet is conveyed to the left, the fan 10 is turned on to input air into the air inlet pipe 9. The air is sprayed from the nozzle 11 onto the surface of the silicon steel sheet, blowing away dust and other impurities attached to the surface of the silicon steel sheet, thus achieving the effect of cleaning the silicon steel sheet. The nozzle 11 is tilted to the right to allow the air to flow to the right, reducing the occurrence of dust being carried by the air and falling onto the silicon steel sheet on the left side. At the same time, the suction pipe 12 draws in air from inside the base 1, and most of the blown-away dust is sucked in and collected. The filter plate 14 then filters the dust, thereby effectively achieving the effect of cleaning the silicon steel sheet, avoiding the impact of dust and other impurities on subsequent defect detection, and improving the quality of defect detection.

[0047] After a surface defect is detected in a silicon steel sheet, the silicon steel sheet in that area cannot be used and needs to be removed in subsequent processing. Therefore, the surface defect area does not need to be tested for magnetic properties. Performing magnetic attraction energy testing on the surface defect area would waste energy and affect the testing efficiency. To solve this problem, the present invention provides Embodiment 3:

[0048] Please see Figure 8 Among them, the single-chip microcomputer 8 integrates an energy-saving and efficiency-enhancing module 15, and the output terminal of the energy-saving and efficiency-enhancing module 15 is connected to the signal of the comparison module 702.

[0049] In this invention, after the image information acquired by camera 5 is detected as defective by computer software, the computer software sends a surface defect signal to microcontroller 8. Microcontroller 8 then sends the surface defect signal to position calculation module 703. While the above-mentioned inkjet printing operation is running, comparison module 702 compares the distance data between camera 5 and silicon steel sheet online magnetic property measuring device 6 stored in energy-saving and efficiency-enhancing module 15 with the real-time transmission distance data of silicon steel sheet. If the data comparison is successful, it indicates that the part of the silicon steel sheet with surface defects has moved into silicon steel sheet online magnetic property measuring device 6. Comparison module 702 sends a signal to microcontroller 8, and microcontroller 8 pauses the silicon steel sheet online magnetic property measuring device 6 from performing magnetic property detection on the part of silicon steel sheet with surface defects. This saves energy consumption for silicon steel sheet online magnetic property measuring device 6 to detect silicon steel sheets with surface defects, and also saves time required for magnetic attraction detection, improving the practicality of the device.

[0050] The above are merely preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. An online non-destructive testing device for silicon steel sheets in special transformer cores, comprising a base (1), characterized in that: The base (1) is provided with multiple conveying mechanisms (2) on its inner side, and a straightening mechanism (3) is provided on its inner side. Two mounting plates (4) are fixedly connected to the inner side of the base (1). Cameras (5) are installed on opposite sides of the two mounting plates (4). A silicon steel sheet online magnetic property measuring device (6) is installed on the inner side of the base (1). A defect marking system (7) is provided on the inner side of the base (1). A microcontroller (8) is installed on the front of the base (1) to control the opening and closing of the camera (5) and the silicon steel sheet online magnetic property measuring device (6). The output end of the silicon steel sheet online magnetic property measuring device (6) is connected to the microcontroller (8) via signal.

2. The online non-destructive testing device for silicon steel sheets in special transformer cores according to claim 1, characterized in that: The straightening mechanism (3) includes four fixed rollers (301). Both ends of the four fixed rollers (301) are fixedly connected to the inner side of the base (1). The four fixed rollers (301) are distributed in an S-shape. Each of the four fixed rollers (301) is fitted with a rotating sleeve (302) that is rotatably connected to it.

3. The online non-destructive testing device for silicon steel sheets in special transformer cores according to claim 1, characterized in that: The conveying mechanism (2) includes two conveying rollers (201). Both ends of the two conveying rollers (201) are rotatably connected to the inner side of the base (1). Two motors (202) are fixedly connected to the front of the base (1). The output shafts of the two motors (202) pass through the base (1) and are fixedly connected to the two conveying rollers (201) respectively.

4. The online non-destructive testing device for silicon steel sheets in special transformer cores according to claim 3, characterized in that: The defect marking system (7) includes an inkjet printer (701), which is installed on the inside of the base (1). The inkjet printer (701) is located on the left side of the online magnetic property measuring device (6) for silicon steel sheets. The microcontroller (8) integrates a comparison module (702) and a position calculation module (703). An encoder (704) is installed on the back of the base (1). The input shaft of the encoder (704) passes through the base (1) and is fixedly connected to the conveyor roller (201). The output end of the encoder (704) is connected to the position calculation module (703). The position calculation module (703) is connected to the comparison module (702) in a bidirectional signal connection. The output end of the comparison module (702) is connected to the microcontroller (8). The output end of the microcontroller (8) is connected to the position calculation module (703) and the inkjet printer (701) respectively.

5. The online non-destructive testing device for silicon steel sheets in special transformer cores according to claim 1, characterized in that: The base (1) has air inlet pipes (9) that are fixedly connected to both the front and back sides. Fans (10) are installed at opposite ends of the two air inlet pipes (9). Spray nozzles (11) are connected to the opposite sides of the two air inlet pipes (9).

6. The online non-destructive testing device for silicon steel sheets in special transformer cores according to claim 5, characterized in that: The air inlet of the fan (10) is fixedly connected to an air intake pipe (12) that is connected to it. The end of the air intake pipe (12) away from the fan (10) is fixedly connected to the base (1). The base (1) has two air intake slots (13) on its front and back sides. One end of the air intake pipe (12) is connected to the air intake slot (13). A filter plate (14) that is slidably connected to the side of the air intake pipe (12) is inserted therethrough.

7. The online non-destructive testing device for silicon steel sheets in special transformer cores according to claim 4, characterized in that: The microcontroller (8) integrates an energy-saving and efficiency-enhancing module (15), and the output of the energy-saving and efficiency-enhancing module (15) is connected to the comparison module (702) via signal connection.

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