A cutting method for the shell panel of a switching station

Abstract

The present invention relates to a cutting method for the shell panel of a switchgear, which comprises the following steps: obtaining the images of the stainless steel plate to be processed and the stainless steel plate without defects, comparing the two images to find the difference points, determining the positions and quantities of the defects existing on the stainless steel plate according to the difference points, and extracting the shape features of the defects; fitting according to the contour features of the defects; planning the machinable area according to the fitted defect contour; matching the corresponding shell panel according to the machinable area. If no corresponding shell panel can be matched for the machinable area, the stainless steel plate is removed; if a corresponding shell panel can be matched for the machinable area, the size parameters of the shell panel are obtained, and the cutting path is planned in combination with the machinable area; and cutting the corresponding shell panel according to the cutting path. The present invention improves the detection efficiency and accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment processing, and particularly to a cutting method for the shell panel of a switching station. Background Art

[0002] In the power system, a switching station is a common device, and its main function is to control and protect various electrical equipment in the power system. The shell of the switching station is usually made of stainless steel material to ensure its good corrosion resistance and durability. However, there may be some defects in the stainless steel plate during the production process, such as cracks, depressions, etc. These defects may affect the performance and safety of the switching station. Therefore, before manufacturing the shell of the switching station, it is necessary to strictly detect and process the stainless steel plate. In the existing technology, the stainless steel plate is usually detected manually, and the defects on the stainless steel plate are found and judged by visual observation and touch. Then, according to the detection results, the stainless steel plate is cut into the required shape and size by mechanical processing. Finally, the cut stainless steel plates are assembled into the shell of the switching station. However, there are some problems with the existing detection and processing methods. First, the manual detection method is inefficient and prone to missed detection and misdetection, which may result in defective stainless steel plates being used to manufacture the shell of the switching station, thus affecting the performance and safety of the switching station. Second, the existing mechanical processing method has low precision and is difficult to accurately cut the stainless steel plate according to the design requirements, which also affects the manufacturing quality of the shell of the switching station. In addition, the existing detection and processing methods cannot achieve batch processing of the stainless steel plate, which limits the production efficiency of the shell of the switching station. In addition, the existing switching stations detect the defects of the shell panel after processing, resulting in waste of steel. Summary of the Invention

[0003] The purpose of the present invention is to provide a cutting method for the shell panel of a switching station to solve the above technical problems.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A cutting method for the shell panel of a switching station includes the following steps:

[0006] S100. Obtain the image of the stainless steel plate to be processed and the image of the defect-free stainless steel plate, compare the two images to find the difference points, determine the positions and quantities of the defects on the stainless steel plate according to the difference points, and extract the shape characteristics of the defects;

[0007] S200. Fit according to the contour characteristics of the defects;

[0008] S300. Plan the machinable area according to the defect contour after fitting;

[0009] S400. Match the corresponding housing panel according to the machinable area. If no corresponding housing panel is matched for the machinable area, then reject the stainless steel plate. If a corresponding housing panel can be matched for the machinable area, then obtain the dimensional parameters of the housing panel and plan the cutting path in combination with the machinable area.

[0010] S500. Cut the corresponding housing panel according to the cutting path.

[0011] The present invention is further provided that when extracting the contour features of the defect, calculate the area of the defective part. When the area of the defective part exceeds a certain threshold, it is determined that the defect does not belong to the machinable area. When the area of the defective part does not exceed a certain threshold, it is determined that the defect belongs to the machinable area.

[0012] The present invention is further provided that the way to determine the threshold is the average value of the areas of all defective parts.

[0013] The present invention is further provided that in step S200, when fitting the contour features of the defect, a circular fitting method is adopted.

[0014] The present invention is further provided that in step S300, when planning the machinable area, rectangularly frame the fitted circle of the defect, and determine the machinable area according to the defect after the framing.

[0015] The present invention is further provided that the rectangular frame after the framing has a first horizontal side, a second horizontal side, a first vertical side and a second vertical side. Divide the non-defective area into several areas according to the first horizontal side, the second horizontal side, the first vertical side, the second vertical side and the edge of the stainless steel plate to form divided areas, and calculate the areas of the multiple divided areas. Select the framed area with the largest area as the machinable area.

[0016] The present invention is further provided that the rectangular frame after the framing has a first horizontal side, a second horizontal side, a first vertical side and a second vertical side. Divide the non-defective area into several areas according to the first horizontal side, the second horizontal side, the first vertical side, the second vertical side and the edge of the stainless steel plate to form divided areas, and calculate the areas of the multiple divided areas. Match the multiple divided areas with the housing panel. If the divided area can meet the processing requirements of the housing panel, then confirm the divided area as the machinable area.

[0017] The present invention is further configured to further include directly rejecting the stainless steel plate, and the steps are as follows: classify the defects according to the characteristics of the defect area, and calculate the defect loss degree of the stainless steel plate, and the calculation method is: calculate the sum of the areas S2 of all types of defects, then the defect loss degree is S2 / S3; where S3 is the area of the stainless steel plate, and if the defect loss degree is less than or equal to 50%, it is not rejected, and the steps S200 - S500 are followed; if the defect loss degree is greater than 50%, it is rejected.

[0018] The present invention also provides a computer device, which includes a memory and a processor. The memory is used to store computer instructions, and the processor executes the computer instructions to execute the cutting method of the switchgear housing panel.

[0019] The present invention also provides a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to make the computer execute the cutting method of the switchgear housing panel.

[0020] The beneficial effects of the present invention: Compared with the existing technology, the present technical solution includes at least one of the following beneficial effects:

[0021] 1. Improve the detection efficiency and accuracy: The present invention obtains the image of the stainless steel plate to be processed and the image of the defect-free stainless steel plate, compares the two images to find the difference points, determines the defect positions and quantities on the stainless steel plate according to the difference points, and extracts the shape characteristics of the defects. This method greatly improves the detection efficiency and accuracy compared with manual detection, and reduces the situation of missed detection and misdetection.

[0022] 2. Improve the processing accuracy: The present invention fits according to the contour characteristics of the defects, plans the machinable area according to the fitted defect contour, and then matches the corresponding housing panel according to the machinable area. If the corresponding housing panel cannot be matched in the machinable area, the stainless steel plate is rejected; if the corresponding housing panel can be matched in the machinable area, the size parameters of the housing panel are obtained, the cutting path is planned in combination with the machinable area, and finally the corresponding housing panel is cut according to the cutting path. This method greatly improves the processing accuracy compared with the existing mechanical processing method, and can accurately cut the stainless steel plate according to the design requirements.

[0023] 3. Realize batch processing: The detection and processing methods of the present invention can realize batch processing of stainless steel plates, and greatly improve the production efficiency of switchgear housings compared with the existing detection and processing methods. Description of the Drawings

[0024] The accompanying drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:

[0025] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0026] Figure 2 It is a schematic diagram of a defective image of the present invention.

[0027] Figure 3 It is a schematic diagram of the defective image of the present invention after being framed.

[0028] Figure 4 It is a schematic diagram of the defective image of the present invention after being segmented.

[0029] Figure 5 It is a schematic diagram of the operation interface of the present invention. Detailed implementation manners

[0030] The following will detail the implementation manners of the present application in conjunction with the accompanying drawings and embodiments, so as to fully understand how the present application uses technical means to solve technical problems and achieve the implementation process of technical effects and implement accordingly. Embodiment 1

[0031] As Figure 1 shown, Embodiment 1 of the present invention provides a cutting method for the shell panel of a switchgear, including the following steps:

[0032] S100. Obtain the image of the stainless steel plate to be processed and the image of the defect-free stainless steel plate, compare the two images to find the difference points, determine the defect positions and quantities on the stainless steel plate according to the difference points, and extract the shape features of the defects;

[0033] S200. Fit according to the contour features of the defects. When fitting the contour features of the defects, a circle fitting method is adopted;

[0034] S300. Plan the machinable area according to the defect contour after fitting;

[0035] S400. Match the corresponding shell panel according to the machinable area. If the corresponding shell panel cannot be matched for the machinable area, the stainless steel plate will be rejected; if the corresponding shell panel can be matched for the machinable area, obtain the size parameters of the shell panel, and plan the cutting path in combination with the machinable area;

[0036] S500. Cut the corresponding shell panel according to the cutting path.

[0037] In this embodiment, when extracting the contour features of the defect, calculate the area of the defective part. When the area of the defective part exceeds a certain threshold, it is determined that the defect does not belong to the machinable area; when the area of the defective part does not exceed a certain threshold, it is determined that the defect belongs to the machinable area. The way to determine the threshold is the average value of the areas of all defective parts.

[0038] In step S300, when planning the machinable area, rectangularly frame the fitted circle of the defect, and determine the machinable area according to the defect after framing.

[0039] In this embodiment, the rectangular frame after framing the fitted circle has a first horizontal side, a second horizontal side, a first vertical side, and a second vertical side. According to the first horizontal side, the second horizontal side, the first vertical side, the second vertical side, and the edge of the stainless steel plate, the non-defective area is divided into several areas to form divided areas, and the areas of multiple divided areas are calculated. Select the framed area with the largest area as the machinable area.

[0040] Now, a specific steel plate will be further described: As Figure 2 shown, it is the defective image taken. The size of the steel plate is 2000mm×1500mm. According to the comparison result, the defects in Figure 2 are obtained and denoted as defect 1, defect 2, defect 3, and defect 4. The calculated areas are respectively denoted as: S01 = 403.18 square millimeters, S02 = 190.58 square millimeters, S03 = 371.70 square millimeters, S04 = 226.67 square millimeters. The threshold is (403.18 + 190.58 + 371.70 + 226.67) / 4 = 298.0325; it can be seen that the areas of defect 1 and defect 3 are greater than the threshold, and the areas of defect 2 and defect 4 are less than the threshold. Then it is determined that defect 1 and defect 3 do not belong to the machinable area, and defect 2 and 4 are the machinable areas. Then, circular fitting is performed on defect 1 and defect 3, referring to Figure 3 ; Subsequently, the fitted one is framed. The framed rectangular frame has a first horizontal side, a second horizontal side, a first vertical side, and a second vertical side. According to the first horizontal side, the second horizontal side, the first vertical side, the second vertical side, and the edge of the stainless steel plate, the non-defective area is divided into several areas to form divided areas. The divided areas are as Figure 4 shown, forming 3 divided areas A, divided area B, and divided area C. Calculate the areas of the 3 divided areas. The area of area A is 615970 square millimeters, the area of divided area B is 1792777 square millimeters, and the area of divided area C is 317386 square millimeters. Among them, divided area B is the area region with the largest area. Therefore, divided area B is used as the machinable area for processing. Embodiment 2

[0041] The difference between this embodiment and Embodiment 1 is that the rectangular frame after being box-selected has a first horizontal side, a second horizontal side, a first vertical side, and a second vertical side. According to the first horizontal side, the second horizontal side, the first vertical side, the second vertical side, and the edge of the stainless steel plate, the non-defective area is divided into several areas to form divided areas, and the areas of multiple divided areas are calculated. The multiple divided areas are matched with the shell panel. If the divided area can meet the processing requirements of the shell panel, then this divided area is confirmed as a processable area.

[0042] For Embodiment 2, a specific steel plate will be further described as follows: As Figure 2 shown, it is the defective image taken. The size of the steel plate is 2000mm×1500mm. According to the comparison result, the Figure 2 defects in it are obtained and denoted as Defect 1, Defect 2, Defect 3, and Defect 4. The calculated areas are respectively denoted as: S01 = 403.18 square millimeters, S02 = 190.58 square millimeters, S03 = 371.70 square millimeters, S04 = 226.67 square millimeters. The threshold is (403.18 + 190.58 + 371.70 + 226.67) / 4 = 298.0325. It can be seen that the areas of Defect 1 and Defect 3 are greater than the threshold, and the areas of Defect 2 and Defect 4 are less than the threshold. Then it is determined that Defect 1 and Defect 3 do not belong to the processable area, and Defect 2 and 4 are the processable areas. Then, circle fitting is performed on Defect 1 and Defect 3, referring to Figure 3 ; Subsequently, after the fitting, box selection is performed. The rectangular frame after box selection has a first horizontal side, a second horizontal side, a first vertical side, and a second vertical side. According to the first horizontal side, the second horizontal side, the first vertical side, the second vertical side, and the edge of the stainless steel plate, the non-defective area is divided into several areas to form divided areas. The divided areas are as Figure 4 shown, forming 3 divided areas A, divided area B, and divided area C. The areas of the 3 divided areas are calculated. The area of area A is 615970 square millimeters, the area of divided area B is 1792777 square millimeters, and the area of divided area C is 317386 square millimeters. The multiple divided areas are matched with the shell panel. If the divided area can meet the processing requirements of the shell panel, then this divided area is confirmed as a processable area. That is, if the area of area A can meet the processing requirements of any shell panel, it is recognized as a processable area; if the area of area B can meet the processing requirements of any shell panel, it can also be recognized as a processable area. Similarly, area C can also be recognized as a processable area; Subsequently, the processable areas are cut and then the shell panel is processed, that is, the three areas are divided and then processed; or the shell panel is directly processed in the processable area. Embodiment 3

[0043] This embodiment relates to the direct rejection of stainless steel plates, and the steps are as follows: Classify the defects according to the characteristics of the defect areas, and calculate the defect loss degree of the stainless steel plates. The calculation method is as follows: Calculate the sum of the areas S2 of all types of defects, then the defect loss degree is S2 / S3; where S3 is the area of the stainless steel plate. If the defect loss degree is less than or equal to 50%, no rejection is performed, and the operations are carried out according to steps S200 - S500; if the defect loss degree is greater than 50%, rejection is performed. In addition, for Figure 2 the captured defect images, defect 1 and defect 3 are of the same type of defect, which are scratch defects, defect 2 is a scale defect, and defect 4 is a crack defect. At this time, the sum of the areas of the scratch defects is S01 + S03 = 403.18 square millimeters + 371.70 square millimeters = 774.88 square millimeters, S02 = 190.58 square millimeters, S04 = 226.67 square millimeters, S2 = 403.18 + 190.58 + 371.70 + 226.67 = 1192.13 square millimeters, and the defect loss degree = 1192.13 / (2000mm × 1500mm) = 0.000397 = 0.0397%. The steel plate is not rejected, and the operations are carried out through steps S200 - S500. Embodiment 4

[0044] This embodiment provides a computer device, which includes a memory and a processor. The memory is used to store computer instructions, and the processor executes the computer instructions to execute the cutting method of the switchgear housing panel described above. Embodiment 5

[0045] The present invention also provides a computer-readable storage medium, which stores computer instructions for causing the computer to execute the cutting method of the switchgear housing panel described above.

[0046] The present invention improves the detection efficiency and accuracy. By obtaining the images of the stainless steel plates to be processed and the images of defect-free stainless steel plates, comparing the two images to find the differences, determining the positions and quantities of the defects on the stainless steel plates according to the differences, and extracting the shape features of the defects, this method greatly improves the detection efficiency and accuracy compared with manual detection, reducing the situations of missed detection and misdetection. It improves the processing precision. The present invention fits according to the contour features of the defects, plans the machinable area based on the fitted defect contour, then matches the corresponding housing panel according to the machinable area. If no corresponding housing panel can be matched for the machinable area, the stainless steel plate is rejected; if a corresponding housing panel can be matched for the machinable area, the size parameters of the housing panel are obtained, the cutting path is planned in combination with the machinable area, and finally the corresponding housing panel is cut according to the cutting path. This method greatly improves the processing precision compared with the existing machining methods and can accurately cut the stainless steel plate according to the design requirements. It realizes batch processing. The detection and processing methods of the present invention can realize the batch processing of stainless steel plates, greatly improving the production efficiency of the switchgear housings compared with the existing detection and processing methods.

[0047] As used in the specification and claims, certain terms are used to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in names as a way to distinguish components, but use the difference in functions of components as the criterion for distinction. As mentioned throughout the specification and claims, "comprising" is an open-ended term and should be interpreted as "including but not limited to". "Substantially" means within an acceptable error range. Those skilled in the art can solve technical problems within a certain error range and basically achieve the technical effects.

[0048] It should be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a commodity or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a commodity or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the commodity or system including the element.

[0049] The foregoing description has shown and described several preferred embodiments of the present invention. However, as mentioned above, it should be understood that the present invention is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept herein through the above teachings or the skills or knowledge in the relevant field. Any alterations and changes made by those skilled in the art that do not depart from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A cutting method for the shell panel of a switchgear, characterized in that It includes the following steps: S100. Obtain the images of the stainless steel plate to be processed and the defect-free stainless steel plate, compare the two images to find the difference points, determine the positions and quantities of the defects existing on the stainless steel plate according to the difference points, and extract the shape features of the defects; S200. Fit according to the contour features of the defects; S300. Plan the machinable area according to the defect contour after fitting; S400. Match the corresponding housing panel according to the machinable area. If no corresponding housing panel can be matched for the machinable area, the stainless steel plate is removed; if a corresponding housing panel can be matched for the machinable area, obtain the size parameters of the housing panel, and plan the cutting path in combination with the machinable area; S500. Cut the corresponding housing panel according to the cutting path; when extracting the contour features of the defects, calculate the area of the defective part. When the area of the defective part exceeds a certain threshold, it is determined that the defect does not belong to the machinable area; when the area of the defective part does not exceed a certain threshold, it is determined that the defect belongs to the machinable area; the determination method of the threshold is the average value of the areas of all defective parts; in step S200, when fitting the contour features of the defects, a circle fitting method is adopted; in step S300, when planning the machinable area, rectangularly frame the fitted circle of the defect, and determine the machinable area according to the defect after framing; the framed rectangle has a first horizontal side, a second horizontal side, a first vertical side and a second vertical side. Divide the non-defective area into several areas according to the first horizontal side, the second horizontal side, the first vertical side, the second vertical side and the edge of the stainless steel plate to form divided areas, and calculate the areas of multiple divided areas. Select the framed area with the largest area as the machinable area; the framed rectangle has a first horizontal side, a second horizontal side, a first vertical side and a second vertical side. Divide the non-defective area into several areas according to the first horizontal side, the second horizontal side, the first vertical side, the second vertical side and the edge of the stainless steel plate to form divided areas, and calculate the areas of multiple divided areas. Match the multiple divided areas with the housing panel. If the divided area can meet the processing requirements of the housing panel, confirm the divided area as the machinable area; it also includes directly removing the stainless steel plate, and the steps are as follows: classify the defects according to the characteristics of the defect area, and calculate the defect loss degree of the stainless steel plate. The calculation method is: calculate the sum of the areas S2 of all types of defects, then the defect loss degree is S2 / S3; where S3 is the area of the stainless steel plate. If the defect loss degree is less than or equal to 50%, it is not removed, and the steps S200 - S500 are carried out; if the defect loss degree is greater than 50%, it is removed.

2. A computer device, characterized in that, The device includes a memory and a processor. The memory is used to store computer instructions, and the processor executes the computer instructions to execute a method for cutting an opening and closing station housing panel as described in claim 1.

3. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions, and the computer instructions are used to cause a computer to execute a method for cutting an opening and closing station housing panel as described in claim 1.

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