Integrated parameter design method and system suitable for engineering mechanical structure

Abstract

The invention discloses an integrated parameter design method and system suitable for an engineering mechanical structure, and the method comprises the steps: firstly, determining design parameters of the engineering mechanical structure; secondly, an integrated parameter template of the structure is established, and the integrated parameter template comprises a three-dimensional model template, a two-dimensional drawing template and a finite element model template; then, constructing driving parameters of a three-dimensional model based on the design parameters of the structure; and finally, establishing a relation between the driving parameters and the integrated parameter template, and realizing integrated design of three-dimensional model parameter change, two-dimensional drawing automatic updating and finite element model automatic updating through parameter driving. According to the method, the development period of the engineering mechanical structure can be shortened, and the product delivery efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, specifically to an integrated parameter design method and system applicable to engineering machinery structures. Background Technology

[0002] Most construction machinery is non-standard, requiring designers to create designs for the entire machine or individual components based on customer needs. This necessitates redrawing the 3D model, performing finite element analysis (FEM) modeling and verification, and generating new 2D drawings, extending product delivery cycles and significantly impacting design efficiency. However, some construction machinery has relatively mature structures, requiring only minor changes to dimensions or layout to meet customer requirements. Currently, however, designers, especially with mature structures, still need to redraw the 3D model, perform FEM modeling and verification, and generate new 2D drawings, further extending product development cycles. Moreover, the three stages—3D modeling, FEM verification, and drawing generation—are not highly interconnected, involving a significant amount of repetitive work. Modifying parameters cannot meet the design requirements of new products, severely impacting product delivery efficiency. If an integrated design system could automatically regenerate 3D models, FEM models, and 2D drawings simply by modifying design parameters, it would reduce repetitive modeling work, shorten product development cycles, and improve efficiency. Summary of the Invention

[0003] This invention discloses an integrated parameter design method and system applicable to engineering machinery structures. It establishes the connection between the driving parameters of engineering machinery structures and the integrated parameter template, and realizes integrated design of three-dimensional model generation, automatic updating of two-dimensional drawings and automatic updating of finite element models through parameter driving.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This invention provides an integrated parameter design method applicable to engineering machinery structures, comprising:

[0006] Determine the design parameters of the engineering machinery structure;

[0007] An integrated parameter template for the engineering machinery structure is established, including: a three-dimensional model template, a two-dimensional drawing template, and a finite element model template;

[0008] Based on the design parameters of the engineering machinery structure, the driving parameters of the three-dimensional model are constructed;

[0009] Establish a connection between the driving parameters and the integrated parameter template. After the three-dimensional model parameters are modified, the two-dimensional drawings and finite element model are automatically updated.

[0010] Preferably, determining the design parameters of the engineering machinery structure includes: the external dimensions of the engineering machinery structure, the relevant features of the components, and the relative positional relationships between the components.

[0011] Preferably, the construction principle of the three-dimensional model template is as follows:

[0012] In 3D software, a top-down design method is used to construct a skeleton model, which includes a release skeleton, a position skeleton, and a design skeleton.

[0013] The position skeleton contains the layout positions of the engineering machinery structural components, and is used for parameterized driving of component assembly relationships;

[0014] The design framework includes sketches of the structural components of the engineering machinery, used for parametric driving of component dimensions and features.

[0015] Preferably, in the three-dimensional model template,

[0016] The installation coordinate system of the component after it is created must be consistent with the location skeleton.

[0017] Preferably, in the three-dimensional model template,

[0018] The solid generation method for the components is to project the sketch in the design skeleton, thereby realizing the association between the design skeleton and the components.

[0019] Preferably, the construction principle of the two-dimensional drawing template is as follows:

[0020] The 2D drawing output function of 3D software is used to automatically generate 2D drawings of the 3D model, so that the parameters of the associated 2D drawing template are automatically modified after the parameters of the 3D model are modified.

[0021] The dimensions of the two-dimensional drawing template must be marked in advance, and the marked dimensions must conform to the drawing specifications;

[0022] The two-dimensional drawing template must be marked with the processing technology and welding annotations in advance.

[0023] Preferably, the construction principle of the finite element model template is as follows:

[0024] The finite element tool built into the 3D software is used for verification, so that the finite element verification parameters are automatically modified after the parameters of the 3D model are modified.

[0025] Boundary conditions need to be preset in advance, including:

[0026] The required materials are selected from the software material library using finite element tools to allocate the components of the engineering machinery structure;

[0027] Constraints are applied to components based on operating conditions;

[0028] A load is applied to the component at the loading point, and the loading position of the load needs to be parameterized and driven.

[0029] Set the mesh size for the finite element model.

[0030] Preferably, the maximum length of the finite element model mesh is recommended as follows: , in, The maximum grid length of the component. The maximum side length of the component. For grid-specific coefficients, This is the grid magnification factor.

[0031] Preferably, the principle for constructing the driving parameters is as follows:

[0032] The driving parameters include the dimensional parameters, characteristic parameters, and positional parameters of each component of the engineering machinery structure.

[0033] Preferably, establishing the connection between the driving parameters and the integrated parameter template includes:

[0034] Establish the association between the driving parameters and the position skeleton, so that the driving position skeleton changes accordingly when the size parameters and position parameters change;

[0035] Establish the association between the driving parameters and the design skeleton, so that the design skeleton changes accordingly when the feature parameters change;

[0036] Based on the relationship between the driving parameters and the integrated parameter template, the three-dimensional model can be automatically generated by changing the driving parameters.

[0037] This invention also provides an integrated parameter design system suitable for engineering machinery structures, used to implement the above-mentioned integrated parameter design method suitable for engineering machinery structures, the system comprising:

[0038] The parameter acquisition module is used to determine the design parameters of the engineering machinery structure;

[0039] The template construction module is used to create an integrated parameter template for the engineering machinery structure, including: a three-dimensional model template, a two-dimensional drawing template, and a finite element model template;

[0040] The drive parameter design module is used to construct the drive parameters of the three-dimensional model based on the design parameters of the engineering machinery structure.

[0041] The driving module is used to establish the connection between the driving parameters and the integrated parameter template. After the three-dimensional model parameters are modified, the two-dimensional drawings and finite element model are automatically updated.

[0042] The beneficial effects of the technical solution of this invention are as follows:

[0043] This invention discloses an integrated parameter design method applicable to engineering machinery structures. First, the design parameters of the engineering machinery structure are defined. Second, an integrated parameter template for the structure is established, including a 3D model template, a 2D drawing template, and a finite element analysis template. Then, the design parameters of the structure are used as driving parameters to construct its 3D model. Finally, the connection between the driving parameters and the integrated parameter template is established, achieving integrated design through parameter-driven processes for 3D model generation, automatic updating of 2D drawings, and automatic updating of the finite element model. This method can shorten the development cycle of engineering machinery structures and improve product delivery efficiency. Attached Figure Description

[0044] Figure 1 A schematic diagram of an integrated parameter design method for engineering machinery structures provided in an embodiment of the present invention;

[0045] Figure 2 A three-dimensional structural schematic diagram of an engineering machinery component provided in an embodiment of the present invention;

[0046] Figure 3(a) is Figure 2 The two-dimensional drawing of the front sealing plate part of the engineering machinery component shown in Figure 3(b) is... Figure 2 The diagram shows a two-dimensional assembly drawing of the engineering machinery components.

[0047] Figure 4 for Figure 2 The diagram shows a finite element model of an engineering machinery component. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this invention are used to explain the invention, but are not intended to limit the invention.

[0049] It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the invention are shown in the accompanying drawings, while other details that are not closely related to the invention are omitted.

[0050] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, element, step, or component, but does not exclude the presence or addition of one or more other features, elements, steps, or components.

[0051] It should also be noted that, unless otherwise specified, the term "connection" in this article can refer not only to a direct connection, but also to an indirect connection involving an intermediary.

[0052] In the following description, embodiments of the invention will be illustrated with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar parts, or the same or similar steps.

[0053] It should be emphasized here that the step markers mentioned below are not a limitation on the order of the steps, but should be understood as meaning that the steps can be executed in the order mentioned in the embodiments, or in a different order than in the embodiments, or several steps can be executed simultaneously.

[0054] This invention provides an integrated parameter design method applicable to engineering machinery structures, see [link / reference]. Figure 1 This includes the following steps:

[0055] S1. Determine the design parameters of the engineering machinery structure;

[0056] S2. Establish an integrated parameter template for engineering machinery structures, including: a 3D model template, a 2D drawing template, and a finite element model template;

[0057] S3. Based on the design parameters of the engineering machinery structure, construct the driving parameters of the three-dimensional model;

[0058] S4. Establish the connection between driving parameters and integrated parameter templates. Through parameter-driven implementation, the 2D drawings and finite element models will be automatically updated after the 3D model parameters are modified.

[0059] In step S1 of the present invention, the design parameters of the engineering machinery structure are determined, including: external dimensions, relevant features of parts, and relative positional relationships between components.

[0060] In step S2 of this invention, a top-down design approach is used in 3D software to establish an integrated parameter template for the engineering machinery structure. The principles for constructing the 3D model template are as follows:

[0061] The 3D model template needs to build a skeleton model, including the publishing skeleton, the location skeleton, and the design skeleton;

[0062] The location skeleton contains the layout positions of the structural components, which is used for parametric driving of the subsequent component assembly relationships;

[0063] The design skeleton includes sketches of the structural components, which are used to parametrically drive the subsequent dimensions and features of the components.

[0064] The skeleton is the basic structural framework used for the model.

[0065] It should be noted that the installation coordinate system of the 3D model components is consistent with the position skeleton after they are created.

[0066] It should be noted that the solid generation of 3D model parts requires projecting the sketch in the design skeleton. This enables the association between the design skeleton and the parts, allowing parameters to directly drive the design skeleton and thus change the size of the parts.

[0067] It should be noted that the 2D drawings are automatically generated based on the 3D model. That is, a 2D drawing template is output from a 3D model template, and the 2D drawing contains preset details such as technical requirements. Of course, 2D drawings also have technical requirements such as tolerances, which cannot be defined through the template and must be added directly to the 2D drawing by technical personnel based on the actual situation.

[0068] In step S3 of this invention, based on the design parameters of the engineering machinery structure in S1, the driving parameters of the three-dimensional model of the engineering machinery structure are constructed using three-dimensional software. The principles for constructing the driving parameters are as follows:

[0069] The detailed parameters included in the driving parameters include the dimensional parameters, characteristic parameters, and positional parameters of each component of the engineering machinery structure;

[0070] The position skeleton is used to drive the relative position of the overall components. It needs to be able to change the position skeleton when the size parameters are changed, and at this time the relative position of the components also changes.

[0071] The design skeleton is used to drive the features of the overall components, such as the position and diameter of openings. The driving parameters drive changes in the design skeleton, and changes in the design skeleton lead to changes in the features of the components.

[0072] In step S4 of this invention, the finite element tool built into the 3D software is used for verification, which can automatically modify the finite element verification parameters after the 3D model parameters are modified.

[0073] The boundary conditions need to be preset in advance using the finite element tool in the 3D software. The principles for constructing the finite element model template are as follows:

[0074] The properties of the parts need to be set, that is, the required materials are selected from the software material library and the parts are allocated.

[0075] Constraints need to be imposed on components based on operating conditions;

[0076] When applying a load at the loading point, the load loading position needs to be parameterized. One or more points can be pre-set for parameterization.

[0077] The mesh size of the finite element model needs to be set. The recommended calculation principle for the maximum mesh length is as follows:

[0078] ,

[0079] in, The maximum grid length of the component. The maximum side length of the component. The specific coefficient for the grid is set to a value between 20 and 40. This is the mesh scaling factor. Where, when modeling as shell elements... Values ​​range from 8 to 12 when modeling as solid elements. Values ​​range from 12 to 18.

[0080] Using the 2D plotting function of 3D software, a 2D drawing template for the 3D model can be created. This allows for automatic modification of the associated 2D drawing template parameters after changes to the 3D model parameters. The principles for constructing the 2D drawing template are as follows:

[0081] Two-dimensional drawing templates must have dimensions marked in advance, and the marked dimensions must conform to the drawing specifications;

[0082] The processing techniques and welding specifications need to be marked in advance.

[0083] By directly changing the driving parameters in step S3, the entire integrated design process of automatically regenerating 3D models, finite element models, and 2D drawings can be achieved.

[0084] The following section uses a component of engineering machinery as an example to illustrate the integrated parameter design method proposed in this invention in detail with reference to the accompanying drawings. The specific implementation process is as follows:

[0085] 1) such as Figure 2 This is a schematic diagram of a component of a certain type of engineering machinery. The design parameters of this component are listed below, and some schematic parameters are shown in Table 1.

[0086] Table 1 Design parameters of the component

[0087]

[0088] 2) In 3D software, using the Top-Down design approach, an integrated parameter template for the component structure is created, which includes a 3D model template, a 2D drawing template, and a finite element model template.

[0089] The 3D model template needs to build a skeleton model, including publishing the skeleton, position estimation, and designing the skeleton. The modeling list is shown in Table 2.

[0090] Table 2 3D Model Template

[0091]

[0092] 3) Based on the component design parameters listed in 1), construct the driving parameters of the component's 3D model in the 3D software.

[0093] 4) Open the built-in finite element tool in the 3D software. First, assign materials to the components, selecting Q355 as the material. Add constraints at the ear plate holes of the component and apply loads at the loading points.

[0094] Based on the recommended calculation principles for mesh length, the maximum mesh length is controlled at 30, with specific values ​​shown in Table 3. Calculations show that the maximum stress in this component is 308 MPa, and the location of the maximum stress is at the weld between the displacement lug and the front sealing plate.

[0095] Table 3. Values ​​of elements for calculating grid length

[0096]

[0097] 5) In the 3D software, use the 2D drawing output function to create a 2D drawing template for the 3D model, and annotate the dimensions and processing requirements of the part drawings and assembly drawings of the component. See Figures 3(a) and 3(b) for 2D drawing annotation diagrams. Figure 3(a) is the 2D drawing of the front sealing plate part of the engineering machinery component, and Figure 3(b) is the 2D drawing of the assembly of the engineering machinery component. The finite element model template can be found here. Figure 4 .

[0098] 6) Subsequently, by directly changing the driving parameters in 3), the entire process of integrated parameter design, including the generation of the 3D model of the component, the automatic updating of the 2D drawings, and the automatic updating of the finite element model, can be realized.

[0099] Based on the above-mentioned inventive concept, the present invention also provides an integrated parameter design system suitable for engineering machinery structures, for implementing the above-mentioned integrated parameter design method suitable for engineering machinery structures, the system comprising:

[0100] The parameter acquisition module is used to determine the design parameters of the engineering machinery structure;

[0101] The template construction module is used to create an integrated parameter template for the engineering machinery structure, including: a three-dimensional model template, a two-dimensional drawing template, and a finite element model template;

[0102] The drive parameter design module is used to construct the drive parameters of the three-dimensional model based on the design parameters of the engineering machinery structure.

[0103] The driving module is used to establish the connection between the driving parameters and the integrated parameter template. After the three-dimensional model parameters are modified, the two-dimensional drawings and finite element model are automatically updated.

[0104] It is worth noting that the system embodiment corresponds to the above method embodiment. The implementation methods of the above method embodiments are all applicable to the system embodiment and can achieve the same or similar technical effects, so they will not be described in detail here.

[0105] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0106] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0107] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0108] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An integrated parameter design method applicable to engineering machinery structures, characterized in that, include: Determine the design parameters of the engineering machinery structure; An integrated parameter template for the engineering machinery structure is established, including: a three-dimensional model template, a two-dimensional drawing template, and a finite element model template; Based on the design parameters of the engineering machinery structure, the driving parameters of the three-dimensional model are constructed; Establish a connection between the driving parameters and the integrated parameter template. After the three-dimensional model parameters are modified, the two-dimensional drawings and finite element model are automatically updated.

2. The integrated parameter design method for engineering machinery structures according to claim 1, characterized in that, The determination of design parameters for engineering machinery structures includes: the external dimensions of the engineering machinery structure, the relevant characteristics of the components, and the relative positional relationships between the components.

3. The integrated parameter design method for engineering machinery structures according to claim 2, characterized in that, The construction principle of the 3D model template is as follows: In 3D software, a top-down design method is used to construct a skeleton model, which includes a release skeleton, a position skeleton, and a design skeleton. The position skeleton contains the layout positions of the engineering machinery structural components, and is used for parameterized driving of component assembly relationships; The design framework includes sketches of the structural components of the engineering machinery, used for parametric driving of component dimensions and features.

4. The integrated parameter design method for engineering machinery structures according to claim 3, characterized in that, In the three-dimensional model template The installation coordinate system of the component after it is created must be consistent with the location skeleton.

5. The integrated parameter design method for engineering machinery structures according to claim 3, characterized in that, In the three-dimensional model template The solid generation method for the components is to project the sketch in the design skeleton, thereby realizing the association between the design skeleton and the components.

6. The integrated parameter design method for engineering machinery structures according to claim 3, characterized in that, The construction principle of the two-dimensional drawing template is as follows: The 2D drawing output function of 3D software is used to automatically generate 2D drawings of the 3D model, so that the parameters of the associated 2D drawing template are automatically modified after the parameters of the 3D model are modified. The dimensions of the two-dimensional drawing template must be marked in advance, and the marked dimensions must conform to the drawing specifications; The two-dimensional drawing template must be marked with the processing technology and welding annotations in advance.

7. The integrated parameter design method for engineering machinery structures according to claim 3, characterized in that, The construction principle of the finite element model template is as follows: The finite element tool built into the 3D software is used for verification, so that the finite element verification parameters are automatically modified after the parameters of the 3D model are modified. Boundary conditions need to be preset in advance, including: The required materials are selected from the software material library using finite element tools to allocate the components of the engineering machinery structure; Constraints are applied to components based on operating conditions; A load is applied to the component at the loading point, and the loading position of the load needs to be parameterized and driven. Set the mesh size for the finite element model.

8. The integrated parameter design method for engineering machinery structures according to claim 7, characterized in that, The recommended maximum mesh length for the finite element model is as follows: ， in, The maximum grid length of the component. The maximum side length of the component. For grid-specific coefficients, This is the grid magnification factor.

9. The integrated parameter design method for engineering machinery structures according to claim 3, characterized in that, The principle for constructing the driving parameters is as follows: The driving parameters include the dimensional parameters, characteristic parameters, and positional parameters of each component of the engineering machinery structure.

10. The integrated parameter design method for engineering machinery structures according to claim 9, characterized in that, Establishing the connection between the driving parameters and the integrated parameter template includes: Establish the association between the driving parameters and the position skeleton, so that the driving position skeleton changes accordingly when the size parameters and position parameters change; Establish the association between the driving parameters and the design skeleton, so that the design skeleton changes accordingly when the feature parameters change; Based on the relationship between the driving parameters and the integrated parameter template, the three-dimensional model can be automatically generated by changing the driving parameters.

11. An integrated parameter design system suitable for engineering machinery structures, characterized in that, The system for implementing the integrated parameter design method for engineering machinery structures according to any one of claims 1 to 10, the system comprising: The parameter acquisition module is used to determine the design parameters of the engineering machinery structure; The template construction module is used to create an integrated parameter template for the engineering machinery structure, including: a three-dimensional model template, a two-dimensional drawing template, and a finite element model template; The drive parameter design module is used to construct the drive parameters of the three-dimensional model based on the design parameters of the engineering machinery structure. The driving module is used to establish the connection between the driving parameters and the integrated parameter template. After the three-dimensional model parameters are modified, the two-dimensional drawings and finite element model are automatically updated.

Images