3DEXP platform modeling method based on two-dimensional arrangement diagram of drain plug

Abstract

The invention provides a 3DEXP platform modeling method based on a two-dimensional arrangement diagram of a drain plug. According to the technical scheme, the method comprises the following steps that firstly, the information requirement of a 3DEXP platform for arrangement of a drain plug model is analyzed, and a drain plug equipment model library is set in the 3DEXP according to the drain plug standard; then, the positioning information of the drain plug is read from the two-dimensional arrangement diagram, the two-dimensional arrangement diagram of the drain plug comprises complete coordinate axis information of the whole ship, and two-dimensional arrangement of the drain plug is carried out based on the two-dimensional arrangement diagram so as to read XY coordinate values of the drain plug; then, under the condition that the two coordinate parameters are determined, vertical lines are established in batches on the basis of XY coordinate values of the drain plug in a 3DEXP platform to determine Z coordinate values; and finally, an independent coordinate axis of each discharge plug is set, the intersecting line of the YZ face and the XZ face of the coordinate axis and the outer plate serves as the basis for inclination of the discharge plug, and therefore model arrangement of the discharge plug is completed after the discharge plug is subjected to two times of inclined rotation, and the discharge plug is arranged to be attached to the outer plate.

Description

Technical Field

[0001] The present application belongs to the field of ship technology, and in particular relates to a 3DEXP platform modeling method based on a two-dimensional layout diagram of a drain plug. Background Art

[0002] The drain plugs configured in ships are mainly used at the bottom of water tanks, oil tanks and other compartments to discharge residues or accumulated water in the tanks when needed. The drain plugs are usually set at the rear of the double bottom tanks close to the transverse bulkhead and close to the centerline of the ship to facilitate the removal of residues and accumulated water in the tanks, especially when emptying the oil tanks after the water pressure test during the shipbuilding stage, or after the ship is docked for repairs or tank cleaning.

[0003] Drain plugs are relatively common outfitting parts in the outfitting profession, and they need to fit the outer plate layout. The model requires many steps of manual adjustment. For each drain plug, especially the drain plugs at positions with larger curvatures, the two-dimensional layout diagram usually cannot accurately provide the required rotation angle of the model. Therefore, they need to be adjusted manually one by one in the model layout. In addition, due to uncontrollable external factors, the drain plugs may also be adjusted later. Therefore, building the model is a repetitive task, which is time-consuming and prone to errors. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a 3DEXP platform modeling method based on a two-dimensional layout diagram of a drain plug, so as to better solve the technical problems encountered in the existing ship drawing design.

[0005] A 3DEXP platform modeling method based on a two-dimensional layout diagram of a drain plug includes at least the following steps:

[0006] S100: Classifying the models and specifications of the drain plugs, editing the drain plugs of different models and specifications in the two-dimensional layout drawing to form a CAD adjustable block, and associating the two-dimensional layout drawing of the drain plugs with the specifications and models of the drain plugs, so that the CAD adjustable block can call the drain plugs of different models and specifications;

[0007] S200: Counting the numbers and cabin information of the drain plugs, setting an adjustable attribute block for the two-dimensional arrangement part number of the drain plugs, and setting the numbers and cabin information of the drain plugs in the adjustable attribute block of the two-dimensional arrangement part number for subsequent information reading;

[0008] S300: arranging the drain plugs in two dimensions using CAD adjustable blocks and editable attribute blocks, and setting the coordinate axes contained in the background image of the local cabin of the ship where the drain plugs are arranged as the coordinate axis blocks of the whole ship, so as to read the corresponding XY coordinate axis parameters for each drain plug and generate a two-dimensional arrangement diagram of the drain plugs;

[0009] S400: Based on the two-dimensional layout diagram of the drain plug, the two-dimensional layout part number, specification model, and XY coordinate axis parameters of the drain plug are read and written into an information table to obtain an operation workbook;

[0010] S500: Based on the XY coordinate axis parameters corresponding to the two-dimensional arrangement part number of the drain plug, the hull shell and its full-ship coordinate axis are retrieved in the corresponding project of 3DEXP, and vertical line modeling is performed to obtain the Z value of the intersection of each XY coordinate axis parameter and the hull shell. The Z value is the height of the drain plug. The Z value is fed back to the information table of the drain plug in S400 to obtain the positioning XYZ value of the drain plug;

[0011] S600: based on the XYZ value of the drain plug, a coordinate axis is established in the model including the hull and the coordinate axis of the entire ship, and the newly established coordinate axis is named as the corresponding drain plug part number;

[0012] S700: Based on the newly established coordinate axis of the drain plug, a corresponding model library is set in 3DEXP, and the drain plug model in 3DEXP is called according to the specification model corresponding to the drain plug part number in the table, and the coordinate axis is assembled and arranged to complete the model arrangement of the drain plug.

[0013] In an optional implementation, step S100, in the process of forming a CAD adjustable block, the drain plug is made into the same dynamic block based on different physical parameters, and visibility selection is performed according to the required specifications to complete the layout. At the same time, the current visibility state of the dynamic block and the drain plug specifications are read to associate the drain plug two-dimensional layout diagram with the drain plug specifications.

[0014] In an optional implementation manner, the physical parameters are plate thickness parameters and sealing material parameters.

[0015] In an optional implementation, in step S300, the coordinate axis and the ship are arranged in a 1:1 ratio, and the coordinate axis includes all rib positions of the ship, and the XY coordinate axis parameters of each drain plug are read based on the coordinate axis.

[0016] In an optional embodiment, in step S600, the newly established coordinate axis is named as the corresponding drain plug part number, and then the XZ plane and YZ plane of each coordinate axis are locally intersected with the hull to determine the rotation angle required for the drain plug based on the outer plate fitting arrangement.

[0017] In an optional embodiment, the intersection line of the XZ plane and YZ plane of each drain plug positioning coordinate axis with the hull shell is taken within a preset distance range based on the origin of the corresponding coordinate axis, and then the corresponding coordinate axis is deflected in a direction determined by the two endpoints of the origin of the coordinate axis and the intersection of the X-axis / Y-axis directions, thereby making the X-axis and Y-axis of the coordinate axis parallel to the local intersection line of the XZ plane and the YZ plane and the outer plate, respectively, to achieve a fitted arrangement of the drain plug.

[0018] In an optional implementation manner, the preset distance is between 20 mm and 40 mm.

[0019] In an optional implementation manner, it also includes:

[0020] S800: After the model layout of the drain plug is completed, the specification model and positioning information of the drain plug model are reversely extracted to form an information table, which is compared with the information table extracted from the two-dimensional plan layout of the drain plug to ensure the accuracy of the model specification and positioning information of the drain plug.

[0021] Compared with the prior art, the technical solution provided by this application has the following beneficial effects:

[0022] The technical solution provided in this application is based on the 3DEXP platform modeling of the two-dimensional layout diagram of the drain plug, and applies two-dimensional driven three-dimensional modeling to meet the needs from detailed design to production design, and realizes intelligent modeling of components. In addition, through two-dimensional driven three-dimensional modeling, the uniqueness of the data source from top to bottom is achieved, ensuring that the data is unified and without deviation, which greatly improves the work efficiency of drawing design reviewers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A method step diagram showing the technical solution provided by this application;

[0024] Figure 2 Displays a table of commonly used drain plug types and specifications;

[0025] Figure 3 Shown is an example diagram of a dynamic block for the drain plug plane;

[0026] Figure 4 Displayed is a schematic diagram of the attribute block of the related information of the drain plug;

[0027] Figure 5 A schematic diagram showing a typical arrangement of a drain plug is shown;

[0028] Figure 6 Shown is a schematic diagram of a typical model of the entire ship's hull shell;

[0029] Figure 7 Shown as a drain plug model library;

[0030] Figure 8 Displays a table for inputting assembly information for the drain plug. DETAILED DESCRIPTION

[0031] In the prior art, the drawings currently submitted for review and delivered are still mainly two-dimensional drawings, but most production designs in the industry have already implemented three-dimensional design software. Therefore, it is necessary to consider the method of driving three-dimensional modeling with two-dimensional drawings to improve the efficiency and accuracy of three-dimensional production design modeling. Since different drawing design elements have different design principles, the implementation methods of two-dimensional driving three-dimensional are also different. Therefore, this application takes the drain plug as the target, and realizes the three-dimensional modeling of the drain plug based on the 3DEXP platform driven by the two-dimensional layout diagram of the drain plug, which improves the modeling efficiency while realizing the uniqueness of the data source and avoiding human errors.

[0032] The following describes the implementation methods of the present application through specific examples. Those skilled in the art can easily understand other advantages and principles of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods. The details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application.

[0033] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of this patent, so they have no substantial technical significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects and purposes that can be achieved by this patent, should still fall within the scope of the technical content disclosed by this patent. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this patent. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of this patent without substantial change in the technical content.

[0034] This embodiment provides a 3DEXP platform modeling method based on a two-dimensional layout diagram of a drain plug. The two-dimensional layout diagram of the drain plug mainly includes the specifications and models of the drain plug and the corresponding cabin information, the positioning information of the drain plug, the size of the drain plug opening, etc. There are many types of drain plugs, and they are distinguished between oil-tight and water-tight. At the same time, the layout feature of the drain plug is to fit the outer plate. Therefore, drain plugs need to be set in many places with large linear curvature on the ship, resulting in the need for the three-dimensional layout of the drain plug to be deflected according to the outer plate situation at the actual position in order to accurately complete the layout of the drain plug model, and provide a more accurate model diagram for the subsequent drain plug model opening. If the information sorted out in the two-dimensional layout diagram can be accurately inherited in the three-dimensional software, it is bound to be possible to achieve the effect of unifying the drawing model by only maintaining the information of the two-dimensional layout diagram, and improve the efficiency and accuracy of model building.

[0035] Therefore, based on the characteristics of the two-dimensional layout of the drain plug, we consider how to quickly complete the layout of the drain plug model in the 3DEXP platform. First, analyze the information requirements of the 3DEXP platform for the layout of the drain plug model. The model layout must first determine the drain plug standard and its corresponding model specifications. In 3DEXP, set up the drain plug equipment model library according to the drain plug standard to facilitate calling according to the standard and its model. Secondly, read the drain plug positioning information from the two-dimensional layout diagram. According to the layout characteristics of the drain plug, the two-dimensional layout diagram of the drain plug can include the complete coordinate axis information of the entire ship. Based on this, the two-dimensional layout of the drain plug can read the XY coordinate value of the drain plug. When the two coordinate parameters are determined, the vertical line is batch established based on the XY coordinate value of the drain plug in the 3DEXP platform, and its intersection with the hull model is the height value corresponding to each drain plug. Based on the determined XYZ coordinate value, a separate coordinate axis is set for each drain plug, and the intersection line of the YZ plane and XZ plane of this coordinate axis with the outer plate is used as the basis for the inclination of the drain plug. Therefore, the model layout of the drain plug is completed after the drain plug is tilted and rotated twice, thereby realizing the model layout of the drain plug fitting the outer plate.

[0036] The following combination Figures 1 to 8 The 3DEXP platform modeling method provided in this embodiment is described in detail step by step.

[0037] S100: Classify the models and specifications of the drain plugs, edit the drain plugs of different models and specifications in the two-dimensional layout drawing to form a CAD adjustable block, and associate the two-dimensional layout drawing of the drain plugs with the specifications and models of the drain plugs to enable the CAD adjustable block to call drain plugs of different models and specifications.

[0038] Specifically, see Figure 2 First, sort out the types and specifications of drain plugs according to the drain plug standards. Since drain plugs of the same specifications have different plate thicknesses at the installation position, they need to be classified according to the plate thickness to sort out the commonly used specifications. Then edit each required type of drain plug to form a CAD adjustable block. Furthermore, the same type of drain plug can be made into the same dynamic block according to different plate thicknesses and different sealing materials, such as Figure 3 As shown, when arranging the drain plugs in two dimensions, when a certain type of drain plug is required, you only need to copy the dynamic block of this type of drain plug, such as AW45-35N, AW45-45N, AW45-52N, AW52-35N, AW52-45N or AW52-52N, and then select the visibility according to the required specifications and sealing type to complete the layout. At the same time, you can adjust the current visibility status and Figure 3 The drain plug type and specification markings shown are read, that is, the drain plug two-dimensional layout diagram and each drain plug specification model are associated and synchronized, laying a solid foundation for the next step of reading and modeling.

[0039] S200: Count the numbers and cabin information of the drain plugs, set an adjustable attribute block for the two-dimensional arrangement part number of the drain plugs, and set the numbers and cabin information of the drain plugs in the adjustable attribute block of the two-dimensional arrangement part number for subsequent information reading.

[0040] Specifically, after the association between the drain plug 2D layout drawing and the model is completed in S100, the difference between the drain plug modeling and drawing compared to other outfitting parts is that the cabin name of each drain plug and the plate thickness at the location must be marked. During on-site installation, in addition to the drain plug part number, it is also necessary to check whether there is a corresponding cabin name on the corresponding drain plug. Therefore, it is necessary to associate the drain plug model with the cabin information. Further, the CAD adjustable attribute field block is used to implement the above association process, and the adjustable attribute field is named the drain plug part number, and then the drain plug part number or serial number, the corresponding cabin abbreviation letter symbol information and the corresponding position plate thickness information are set to form the following: Figure 4 The adjustable attribute field block shown contains the above information of the drain plug. For example, for the drain plug with the part number BP-1, the corresponding compartment is abbreviated as SKEG and the corresponding plate thickness is 60-EH36.

[0041] S300: CAD adjustable blocks and editable attribute blocks are used to arrange the drain plugs in two dimensions, and the coordinate axes contained in the background image of the local cabin of the ship where the drain plugs are arranged are set as the coordinate axis blocks of the whole ship, so as to read the corresponding XY coordinate axis parameters for each drain plug and generate a two-dimensional arrangement diagram of the drain plugs.

[0042] Specifically, the adjustable block of the drain plug and the editable attribute block containing the part number information arranged in step S100 and step S200 are arranged in two dimensions, and then the positioning information of the drain plug is extracted and associated. Based on the two-dimensional layout characteristics of the drain plug and the three-dimensional model building method, the two-dimensional extraction and positioning XY positioning values ​​are used to determine the Z value and rotation angle based on the model. Further, if Figure 5 As shown, Figure 5 The following is a typical drain plug layout. In this step, the coordinate axis is set in a 1:1 ratio with the ship according to the drain plug layout, and the coordinate axis includes all the rib positions of the ship. The background image of each drain plug two-dimensional layout includes the full ship coordinate system. It can be understood that even if the background is a partial non-full ship display, by using the block local display function of CAD, the block of the full ship coordinate system is used in each hull background image, but only the axis system required for the current layout needs to be partially displayed. On this basis, the XY coordinate axis parameters of the currently arranged drain plug are read and positioned based on the plane coordinate axis.

[0043] S400: Based on the two-dimensional layout diagram of the drain plug, the two-dimensional layout part number, specification model, and XY coordinate axis parameters of the drain plug are read and written into an information table to obtain an operation workbook.

[0044] Specifically, based on the drain plug layout diagram of step S300, the part number, specification, and positioning XY value corresponding to each drain plug are read and written into an Excel table. The writing method can be based on a program calling an Excel template. The writing program is shown as follows:

[0045] import xlrd xlwt

[0046] ws = xlrd.open_workbook('workbook name.xls').sheet_by_name('worksheet name')

[0047] nws.write(1,2,'Information to be written')

[0048] nwb.save('workbook.xls')

[0049] The second line of the program opens the template Excel and then writes information to it. The numbers in the third line are the cell row and column information. Here, you can use a loop to write to the specified row or column. Finally, save the operation workbook as an information table for subsequent operations of the drain plug. The subsequent specific positioning Z value and the rotation angle required for each drain plug to fit the outer plate are specifically based on the 3DEXP platform.

[0050] S500: Based on the XY coordinate axis parameters corresponding to the two-dimensional arrangement part number of the drain plug, the hull shell and its entire ship coordinate axis are retrieved in the corresponding project of 3DEXP, and vertical line modeling is performed to obtain the Z value of the intersection of each XY coordinate axis parameter and the hull shell. The Z value is the height of the drain plug. The Z value is fed back to the information table of the drain plug in S400 to obtain the positioning XYZ value of the drain plug.

[0051] Specifically, based on the coordinate XY axis parameter values ​​corresponding to each drain plug part number determined in step S500, the drain plug 3D modeling also requires the drain plug positioning Z value and its rotation angle in the X-axis and Y-axis directions. Therefore, the corresponding project's hull and its full ship coordinate axis are retrieved in the 3DEXP platform. Figure 6 A schematic diagram of a typical model of the hull of the entire ship is shown, and then a batch modeling of vertical lines is performed based on the XY coordinate axis parameter values ​​of each drain plug in step S500. Each vertical line has a unique intersection with the hull, and the height value of the intersection is the Z value of the drain plug positioning. Then, based on the Excel table containing the drain plug specification part number and XY value in the previous step, the positioning value corresponding to the drain plug part number is extracted and written in the 3DEXP platform, thereby obtaining the complete positioning XYZ value of the drain plug.

[0052] S600: Based on the XYZ value of the drain plug, a coordinate axis is established in the model including the hull shell and the coordinate axis of the entire ship, and the newly established coordinate axis is named as the corresponding drain plug part number.

[0053] Specifically, according to the XYZ values ​​of the drain plug positioning read in step S600, coordinate axes are batch-created in the model of the corresponding project including the hull shell and the whole ship shaft system, and each newly created coordinate axis is named as the corresponding drain plug part number, so that the coordinate axis of the corresponding model can be assembled according to the drain plug part number in the later stage. Subsequently, the XZ plane and YZ plane of each coordinate axis are locally intersected with the hull shell to determine the rotation angle required for the drain plug to be arranged based on the outer plate. Further, due to the large curvature of some areas of the hull shell, the fit of the drain plug is only based on the local area of ​​the outer plate where the coordinate axis is located, and the intersection line here is also only based on the local range of the origin of each coordinate axis. The intersection line of the XZ plane and YZ plane of each drain plug positioning coordinate axis with the hull shell is taken from the preset distance range based on the origin of the corresponding coordinate axis, and the preset distance is between 20mm and 40mm, for example, 30mm. Subsequently, the corresponding coordinate axis is deflected based on the direction determined by the two endpoints of the coordinate axis origin and the intersection of the X-axis / Y-axis directions, so that the X-axis and Y-axis of the coordinate axis are parallel to the XZ plane and the YZ plane and the local intersection line of the outer plate, respectively, to achieve the fitting arrangement of the drain plug, and the same operation is performed on the Y axis. Thus, the X-axis and Y-axis of the coordinate axis are parallel to the XZ plane and the YZ plane and the local intersection line of the outer plate, respectively, to achieve the fitting arrangement effect of the drain plug.

[0054] S700: Based on the newly established coordinate axis of the drain plug, a corresponding model library is set in 3DEXP, and the drain plug model in 3DEXP is called according to the specification model corresponding to the drain plug part number in the table, and the coordinate axis is assembled and arranged to complete the model arrangement of the drain plug.

[0055] Specifically, based on each drain plug coordinate axis determined in S500, a corresponding model library is set in 3DEXP according to the drain plug standard. Figure 7 As shown, the drain plug model in 3DEXP is called according to the corresponding specifications of the drain plug part number in the table, and then the coordinate axis assembly and layout are performed according to the coordinate axis corresponding to the drain plug part number determined in the above steps. Figure 8 The assembly information input table is formed by extracting the coordinate axis corresponding information adjusted above, including serial number, part number, XYZ coordinate axis parameters, model specification, cabin name, plate thickness, etc. This table is used for assembly import or the drain plug part number and coordinate axis serial number are matched one by one based on the 3DEXP platform for automatic assembly to complete the drain plug model layout.

[0056] S800: After the model layout of the drain plug is completed, the specification model and positioning information of the drain plug model are reversely extracted to form an information table, which is compared with the information table extracted from the two-dimensional plan layout of the drain plug to ensure the accuracy of the model specification and positioning information of the drain plug.

[0057] In summary, the 3DEXP platform modeling method based on the two-dimensional layout diagram of the drain plug provided by this application applies two-dimensional driven three-dimensional modeling to meet the needs from detailed design to production design, realizes intelligent modeling of components, and realizes the uniqueness of data sources from top to bottom through two-dimensional driven three-dimensional modeling, ensuring that the data is unified and without deviation, greatly improving the work efficiency of drawing design reviewers. Therefore, this application effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0058] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A 3DEXP platform modeling method based on a two-dimensional layout diagram of a drain plug, characterized in that: At least the following steps are included: S100: Classifying the models and specifications of the drain plugs, editing the drain plugs of different models and specifications in the two-dimensional layout drawing to form a CAD adjustable block, and associating the two-dimensional layout drawing of the drain plugs with the specifications and models of the drain plugs, so that the CAD adjustable block can call the drain plugs of different models and specifications; S200: Counting the numbers and cabin information of the drain plugs, setting an adjustable attribute block for the two-dimensional arrangement part number of the drain plugs, and setting the numbers and cabin information of the drain plugs in the adjustable attribute block of the two-dimensional arrangement part number for subsequent information reading; S300: arranging the drain plugs in two dimensions using CAD adjustable blocks and editable attribute blocks, and setting the coordinate axes contained in the background image of the local cabin of the ship where the drain plugs are arranged as the coordinate axis blocks of the whole ship, so as to read the corresponding XY coordinate axis parameters for each drain plug and generate a two-dimensional arrangement diagram of the drain plugs; S400: Based on the two-dimensional layout diagram of the drain plug, the two-dimensional layout part number, specification model, and XY coordinate axis parameters of the drain plug are read and written into an information table to obtain an operation workbook; S500: Based on the XY coordinate axis parameters corresponding to the two-dimensional arrangement part number of the drain plug, the hull shell and its full-ship coordinate axis are retrieved in the corresponding project of 3DEXP, and vertical line modeling is performed to obtain the Z value of the intersection of each XY coordinate axis parameter and the hull shell. The Z value is the height of the drain plug. The Z value is fed back to the information table of the drain plug in S400 to obtain the positioning XYZ value of the drain plug; S600: based on the XYZ value of the drain plug, a coordinate axis is established in the model including the hull and the coordinate axis of the entire ship, and the newly established coordinate axis is named as the corresponding drain plug part number; S700: Based on the newly established coordinate axis of the drain plug, a corresponding model library is set in 3DEXP, and the drain plug model in 3DEXP is called according to the specification model corresponding to the drain plug part number in the table, and the coordinate axis is assembled and arranged to complete the model arrangement of the drain plug.

2. The 3DEXP platform modeling method based on the two-dimensional layout diagram of the drain plug according to claim 1 is characterized in that: Step S100, in the process of forming the CAD adjustable block, the drain plug is made into the same dynamic block based on different physical parameters, and the visibility is selected according to the required specifications to complete the layout. At the same time, the current visibility state of the dynamic block and the drain plug specifications are read to associate the drain plug two-dimensional layout diagram with the drain plug specifications.

3. The 3DEXP platform modeling method based on the two-dimensional layout diagram of the drain plug according to claim 2 is characterized in that: The physical parameters are plate thickness parameters and sealing material parameters.

4. The 3DEXP platform modeling method based on the two-dimensional layout diagram of the drain plug according to claim 1 is characterized in that: In step S300, the coordinate axis is set in a 1:1 ratio with the ship, and the coordinate axis includes all rib positions of the ship, and the XY coordinate axis parameters of each drain plug are read based on the coordinate axis.

5. The 3DEXP platform modeling method based on the two-dimensional layout diagram of the drain plug according to claim 1 is characterized in that: In step S600, the newly established coordinate axis is named as the corresponding drain plug part number, and then the XZ plane and YZ plane of each coordinate axis are locally intersected with the hull to determine the rotation angle required for the drain plug based on the outer plate fitting arrangement.

6. The 3DEXP platform modeling method based on the two-dimensional layout diagram of the drain plug according to claim 5 is characterized in that: The intersection line of the XZ plane and YZ plane of each drain plug positioning coordinate axis with the hull shell is taken within a preset distance range based on the origin of the corresponding coordinate axis, and then the corresponding coordinate axis is deflected in a direction determined by the two endpoints of the origin of the coordinate axis and the intersection of the X-axis / Y-axis directions, thereby making the X-axis and Y-axis of the coordinate axis parallel to the local intersection line of the XZ plane and the YZ plane and the outer plate respectively, so as to achieve the fitting arrangement of the drain plug.

7. The 3DEXP platform modeling method based on the two-dimensional layout diagram of the drain plug according to claim 6 is characterized in that: The preset distance is between 20 mm and 40 mm.

8. The 3DEXP platform modeling method based on the two-dimensional layout diagram of the drain plug according to claim 1 is characterized in that: Also includes: S800: After the model layout of the drain plug is completed, the specification model and positioning information of the drain plug model are reversely extracted to form an information table, which is compared with the information table extracted from the two-dimensional plan layout of the drain plug to ensure the accuracy of the model specification and positioning information of the drain plug.

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