CN112861384B - Three-dimensional model construction method of electrostatic precipitator based on CATIA - Google Patents
Three-dimensional model construction method of electrostatic precipitator based on CATIA Download PDFInfo
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Abstract
The invention discloses a three-dimensional model construction method of an electrostatic precipitator based on CATIA, which comprises the following steps: classifying components, designing component parameters, creating parameterized components, creating a parameter table, building a component library, and building a three-dimensional model. The invention has the advantages that: the invention relies on three-dimensional modeling software CATIA to carry out integral, rapid and linked parameter adjustment and layout design of the electrostatic precipitator model, and forms a general electrostatic precipitator component library through rapid parameterization design, and each component in the library is directly called when the three-dimensional model of the electrostatic precipitator is constructed, so that the modeling speed is high; by dynamically modifying model parameters, attributes are rapidly given to the model, the information quantity of the model is increased, a more accurate, comprehensive and systematic information model is built, the efficiency and the precision of modeling and parameter design can be effectively improved, and the design period and the resource consumption are reduced. The user only needs to modify the parameter values of the parameterized part templates to establish the target part. Or only the key part of the part is defined as a certain parameter, and the design and optimization of the product are realized through the modification of the parameter.
Description
Technical Field
The invention relates to a three-dimensional model construction method, in particular to a three-dimensional model construction method of an electrostatic precipitator based on CATIA.
Background
Electrostatic dust removal is a method of separating and purifying charged dust from gas by using electrostatic force generated by a high-voltage electric field. The electrostatic precipitator is a purification device with high efficiency and low resistance, and is beneficial to more comprehensive and visual understanding of the electrostatic precipitator by establishing a three-dimensional model, and a three-dimensional model foundation is provided for dust removal simulation analysis. Because the electrostatic precipitator is because spare part quantity is many, and same type part also has different specification sizes, because the size repetitive design of different specifications when the designer is designed, not only make design inefficiency, cycle long, still increased part design manufacturing cost. How to carry out parameterization design on the electrostatic precipitator and quickly and normally establish an electrostatic precipitator information model is a key problem which must be solved by parameterization modeling.
Conventional CAD techniques define geometric elements using fixed size values, each element entered having a defined position, and if modified, the original geometric element is deleted and redrawn. In the design process, multiple repeated modifications are unavoidable, and if repeated re-drawing is performed, design efficiency is greatly affected. Therefore, in the development of the traditional electrostatic precipitator model, the following problems exist in equipment assembly and modeling:
(1) The electrostatic dust collection equipment has a large number of parts, is too isolated and scattered, and does not establish a member family library which is convenient for part data management;
(2) The electrostatic dust collection equipment has the advantages of large workload, low efficiency, long period, and the like in assembly design, model establishment, optimization improvement and the like;
(3) An adaptive edited electrostatic precipitator parameterized generic model was not built.
The parametric modeling technique can enable the product design to be automatically changed by modification of related parameters and change of the use environment, so that the modeling efficiency can be greatly improved. Three-dimensional modeling and modeling can be directly performed by CATIA software. The three-dimensional parametric modeling technology is a basic work, and can better reflect product characteristics than two-dimensional parametric modeling, and is more suitable for the development needs of the age. The parameterized design modeling is carried out on the electrostatic precipitator by using CATIA software, a part library is established on the basis of the parameterized design modeling, model features of the parts are combined with parameters of the model to form a parameterized modeling method, the features of the parts are constrained, and the features are constrained, so that the shapes, the sizes, the three-dimensional labels, the materials and the like of the parts can be modified at any time, and finally, the purposes of modifying the parts and completing parameterized modeling are achieved. In parametric design, the size of the geometric figure is defined and the size relation is constrained, simply by changing the size of the parameters, i.e. the size of the part figure can be changed correspondingly. The designer only needs to define the critical dimension of the part as a certain parameter, and the modification and optimization of the geometric model of the product can be realized through the modification of the parameter. When the product is parameterized and modeled, modeling features of the part are analyzed first, model feature parameters are extracted, user parameters and formulas can be defined, parameterized and modeled, and finally the model is checked. The parameterized modeling of the existing parts is completed, templates are established for the digitalized parts, and the end user can conveniently perform operations such as adding, deleting and modifying the series parts.
In CATIA, the template part is a three-dimensional parameterized solid model established by adopting part design technology and topological relation constraint; the dimensional parameters are in the form of expressions; the dimensions of the parameterized model are represented by corresponding variable relationships rather than by defined values, and varying one parameter variable value will automatically change all of the dimensions associated therewith. Therefore, the parameterized model is adopted, the geometric shape of the model is modified and controlled by adjusting the parameters of the model, the aim of generating and editing a series of part families can be achieved, the repeated design of parts is reduced, the whole development period of the model is shortened, and the management of the data of the parts is facilitated.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the defects of the prior art, and aims to provide a three-dimensional model construction method of an electrostatic precipitator based on CATIA, which solves the problems of large workload and low efficiency of the construction of the three-dimensional model of the existing electrostatic precipitator. According to the method, electrostatic dust collection equipment parts are designed based on CATIA software platform parameterization, three-dimensional model construction is carried out, classification summarization is carried out to form a component library, each component in the construction library is directly called when the three-dimensional model of the electrostatic dust collector is constructed, parameterization automatic driving is realized through an external data file, parameters of the same type of components can be quickly adjusted to generate new components, the parameters conform to actual engineering conditions, the repeated part construction process is reduced, and the modeling efficiency is greatly improved. In the modeling process, by adopting CATIA software to carry out parameter design on the serialized parts, the rapid and accurate design of the part family graph is realized, and engineering technicians only need to change certain constraint parameters without changing the whole part design process, so that the parts are updated and designed, thereby becoming an effective means for editing and modifying the part family design and the part model and carrying out optimization and comparison of various schemes. Meanwhile, parameters such as the size and the like involved in the model construction process are designed, and consistency and standardization of information expression are realized through sharing the parameters, so that an accurate data basis is provided for operation and maintenance of the electrostatic precipitator. The establishment of the component library solves the problems of rapid and accurate inquiry and use of a large number of standard components in the design, provides an effective method for the management of the data of the standard component products, improves the efficiency of mechanical design and shortens the design period.
The invention is realized by the following technical scheme:
a three-dimensional model construction method of an electrostatic precipitator based on CATIA comprises the following steps:
step one, classifying components of an electrostatic precipitator, namely dividing the components of the electrostatic precipitator into an anode tube, a cathode wire, a cathode frame, an insulator, a fixed plate and a connecting plate, and determining the naming numbers of the components;
step two, component parameter design, defining geometric and non-geometric attribute information of a control three-dimensional model into parameters;
step three, creating parameterized components, and constructing a three-dimensional model of each component according to a scheme on a design drawing based on the step one and the step two, so as to construct the parameterized components;
(1) Part features based on a design drawing are created according to geometric features of the component, a basic contour line is created, stretching boss, rotation and groove features are created, and a component entity model is created according to component parameters;
(2) Establishing a parameterized function library, converting physical characteristic parameters into model characteristic parameters, defining user parameters and formulas, and completing the establishment of the parameterized function library, wherein each formula respectively links system parameters with corresponding user parameters, so that the purpose of driving a three-dimensional parameter model by the user parameters is achieved;
step four, creating a parameter table, firstly storing data related to the model in a corresponding file in a form of a table, and then associating the parameters of the model with the data in the table by utilizing a design table tool, wherein the model can be driven by selecting different data in the design table tool;
step five, building a component library, classifying and summarizing all components related in the electrostatic precipitator model according to parameters and structures and the actual operation maintenance management requirements, building an electrostatic precipitator component family library, uniformly managing various types of families, and continuously updating and supplementing;
step six, constructing a three-dimensional model, namely loading component families in a component library into projects according to structural forms of electrostatic precipitators in different engineering projects, and arranging and assembling the component families in project files after modifying model parameters to form a complete three-dimensional model of the electrostatic precipitator.
Further, in the first step, the component name is named by Pinyin letters in CATIA
Further, in the step three, 1, the component parametric modeling process should follow the following sequence: anode tube-fixing plate-connecting plate-cathode wire-cathode frame-insulator.
In the step 1, in the parametric modeling process of the component, symmetrical positioning is performed according to the origin and the center reference, and the modeling sequence is from bottom to top and from left to right.
Further, in the fourth step, the chart file format may be a text format or an Excel table file.
Further, before the fifth step, the behavior of each parameter testing component is debugged one by one, and whether the component parameters can drive the change of the model is checked.
In the fifth step, the purpose of changing the external shapes of different data of the model is achieved by selecting different sets of parameter data of the model in the table, so that a part model required by a user is newly built, a catalyst Browser command is selected from a tool menu under a CATIA assembly interface, a component library selection frame is popped up, and finally corresponding parts are selected in the list, previewing of various standard component libraries occurs, and corresponding sections are selected according to requirements when designing.
Compared with the prior art, the invention has the following advantages and beneficial effects: the invention relies on three-dimensional modeling software CATIA to carry out integral, rapid and linked parameter adjustment and layout design of the electrostatic precipitator model, and forms a general electrostatic precipitator component library through rapid parameterization design, and each component in the library is directly called when the three-dimensional model of the electrostatic precipitator is constructed, so that the modeling speed is high; by dynamically modifying model parameters, attributes are rapidly given to the model, the information quantity of the model is increased, a more accurate, comprehensive and systematic information model is built, the efficiency and the precision of modeling and parameter design can be effectively improved, and the design period and the resource consumption are reduced. The user only needs to modify the parameter values of the parameterized part templates to establish the target part. Or only the key part of the part is defined as a certain parameter, and the design and optimization of the product are realized through the modification of the parameter.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention. In the drawings:
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
Examples
As shown in fig. 1, the three-dimensional model construction method of the electrostatic precipitator based on the CATIA comprises the following steps:
step one, classifying components, namely classifying the components according to different electrostatic precipitator structures in order to ensure that the models in a component library are uniquely identified.
In order to facilitate information storage and retrieval, according to the characteristics of an information model of electrostatic dust collection equipment, components of the electrostatic dust collector are divided into an anode tube, a cathode wire, a cathode frame, an insulator, a fixing plate and a connecting plate, naming numbers of the components are determined, and particularly the components are named by Pinyin letters in CATIA according to the names of the components.
Step two, component parameter design, namely, the design of an electrostatic precipitator parameterized three-dimensional model is to carry out geometric analysis on electrostatic precipitator components, and the change of the model is driven through the geometric value and the non-geometric value of the model. The electrostatic precipitator component is a complex of a large amount of information, and involves a plurality of parameters, each of which drives a variable of the model, so that the model changes.
The geometric and non-geometric attribute information of the control three-dimensional model is defined as parameters, and the parameters are defined in the following table,
in order to meet the needs of parametric design and operation and maintenance management, the component parameters include not only geometric parameters representing the shape and appearance of the component, but also material parameters and load data. Component parameters may also be geometric parameters (e.g., length, angle), physical parameters (e.g., material, mass, density), dimensionless parameters (e.g., integers), boolean parameters, and string parameters.
In order to ensure that the understanding and understanding of the information model and the information of the electrostatic precipitator are consistent for different participants, the parameters are required to be designed uniformly, the design parameters must be accurate and accord with logic, and the parameters cannot be ambiguous. The design of the component parameters comprises standardization of parameter names and types, unified regulation of material parameters and other expansion parameter values, and the component parameters need to be determined and designed. For example, the anode tube of the electrostatic precipitator can be a round anode tube or a honeycomb regular hexagon anode tube, wherein the parameters of the round anode tube are name, length, diameter, material and the like; the cathode ray type attribute may be taken as a circular line, a zigzag line, a barbed line, and a star line according to the actual configuration.
And thirdly, creating a parameterized component, wherein parameterized modeling of the component is to refine and mathematically describe the characteristics of the component to form a parameterized model, and obtaining component examples with different forms by changing the parameter values of the model.
Based on the first step and the second step, a three-dimensional model of each component is built according to a scheme on a design drawing, and parameterized component building is performed.
(1) And (3) creating part features based on a design drawing according to the geometric features of the component, creating stretching boss, rotation and groove features by creating basic contour lines, and simultaneously creating a component entity model according to component parameters.
To facilitate constraint design between parts, the component parametric modeling process should follow the following sequence: anode tube-fixing plate-connecting plate-cathode wire-cathode frame-insulator.
In the parametric modeling process of the component, symmetrical positioning is carried out according to the origin and the center reference, and the modeling sequence is from bottom to top and from left to right. Therefore, the dimension marking and constraint can be facilitated, and the model can be in the original position after the dimension parameters of the member are changed when the member is instantiated.
In the dimension parameter setting, dimension constraint is to save the characteristic parameters input by the designer and visually modify the characteristic parameters in the following design, so as to achieve the most direct purpose of parameter-driven modeling. The size driving is the basis of the parameter driving, and the size constraint is the premise of realizing the size driving. The size constraint relates the shape to the size, and control over the geometry is achieved through the size constraint.
(2) And establishing a parameterized function library, converting the physical characteristic parameters into model characteristic parameters, defining user parameters and formulas, and completing the establishment of the parameterized function library, wherein the definition category is a rule for conveniently establishing characteristic driving. Each formula respectively links the system parameters with the corresponding user parameters, thereby achieving the purpose of driving the three-dimensional parameter model by the user parameters.
(1) In order to keep consistent with parameters in the provided parameter table, user parameters added with custom are adopted, and the user parameters need to be associated with model features and also need to be related with system parameters automatically established in the modeling process. After being related with the system parameters of the model, the driving of the model can be realized by modifying the user parameters.
(2) If the association of the two parameters is needed, the linkage among various parameters can be realized by utilizing a formula, and various relations among the parameters are added. After the user parameters are defined, in order to realize the driving of the model, proper relation between the user parameters and the system parameters is established by using a formula, and the model is driven indirectly by driving the system parameters. The user parameters are therefore inseparable from the formula, otherwise meaningless.
Taking an anode tube as an example, the specific process is as follows: entering a part design module; creating part characteristics based on sketch, and creating a stretching boss by creating a basic contour line; creating transformation characteristics of the parts, building a solid model according to characteristic parameters, defining necessary size constraints, and defining corresponding parameter variables for the size constraints in the design process; the dimensions including name, length, diameter and material are determined as parameters of the part. And constructing the characteristic parameters into dimension variables by using a Formula, completing the creation of a parameterized function library, parameterizing the length and diameter dimensions of the anode tube component, and restricting the dimensions of other parts except the parameters and parameter formulas among the parameters.
And step four, creating a parameter table.
The method comprises the steps of creating a parameter table, firstly storing data related to a model in a corresponding file in a form of a table, wherein the table format is a text format or an Excel table file, then using a design table tool to associate parameters of the model with the data in the table, and realizing driving of the model by selecting different data in the design table tool.
| L 1 | D 1 | C 1 | L 2 | W 1 | C 2 | L 3 | W 2 | C 3 | L 4 | D 2 | C 4 | L 5 | W 3 | C 5 | L 6 | D 3 | C 6 |
| 500 | 60 | 316L | 944 | 831 | 316L | 500 | 50 | 316L | 600 | 3 | Cr 15 Ni 60 | 944 | 831.46 | 316L | 100 | 60 | Ce |
| 600 | 60 | 316L | 944 | 831 | 2A14 | 600 | 50 | 2A14 | 700 | 3 | Cr 15 Ni 60 | 944 | 831.46 | 2A14 | 100 | 60 | Ce |
| 700 | 70 | FRP | 1052 | 900 | 2A14 | 700 | 50 | 2A14 | 800 | 3 | Cr 15 Ni 60 | 1052 | 900 | 2A14 | 100 | 60 | Ce |
| 800 | 80 | 316L | 1188 | 1080 | 316L | 800 | 60 | 316L | 900 | 3 | Cr 15 Ni 60 | 1188 | 1080 | 316L | 100 | 60 | Ce |
| 1000 | 100 | 316L | 1452 | 1205 | 316L | 1000 | 70 | 316L | 1100 | 3 | Cr 15 Ni 60 | 1452 | 1205 | 316L | 120 | 70 | Ce |
It should be noted that each column corresponds to a corresponding user parameter, and the name of each column corresponds to a user-defined parameter name one by one for CATIA recognition. If different sizes of three-dimensional models of electrostatic precipitator series products are obtained, only different records in the table need to be changed. If new parameters of the electrostatic precipitator exist, corresponding data are only added to each column in the table.
Creating an outer format parameter table, storing parameter data related to the anode tube in the table in a storage form of a table file, and establishing association between the stored data in the table and parameters related to the three-dimensional model. The purpose of changing the external shapes of different data of the model is achieved by selecting different groups of parameter data of the model in the table, so that a part model required by a user is newly built.
And fifthly, building a component library.
And debugging the behaviors of the parameter test components one by one, and checking whether the component parameters can drive the change of the model. And then, combining all components related in the electrostatic precipitator model with the actual operation maintenance management requirements according to parameters and structures, classifying and summarizing, establishing an electrostatic precipitator component family base, uniformly managing various types of families, and continuously updating and supplementing. The related models and components stored in the model component library can maintain high practicability and universality in actual modeling.
Firstly, the purpose of changing the external shapes of different data of the model is achieved by selecting different groups of parameter data of the model in the table, so that a part model required by a user is newly built. Under the CATIA assembly interface, a catalyst Browser command is selected from a tool menu, a component library selection frame is popped up, and finally, corresponding parts are selected from a list, so that previews of various standard part libraries appear, and when designing, corresponding sections are selected according to requirements.
Specifically, clicking the CATIA file menu to create a new file, and selecting the type of the file to be selected. Renaming the CatalogDocumentl.catage and the chapter from the attributes, clicking the 'Add parts series' button, and selecting the catat file just established from the document. The components in the model tree are double-clicked, required design data is imported, and a component library is successfully built.
And step six, constructing a three-dimensional model.
In different engineering projects, according to the structural form of the electrostatic precipitator, loading the component family in the component library into the project, and arranging and assembling in the project file after modifying the model parameters to form a complete three-dimensional model of the electrostatic precipitator.
For different types of electrostatic precipitators, component models in a component library can be directly called, and unified assembly is carried out after model parameters are modified to form a complete three-dimensional model of the electrostatic precipitator. The electrostatic precipitator structure is complicated, component curved surface is varied variously, in order to construct electrostatic precipitator three-dimensional model fast accurately, uses outside outer parameter table data driven mode to instantiate the construction model.
Firstly, according to the attribute information data of the electrostatic precipitator components marked by the design drawing, carrying out parameter design on the electrostatic precipitator components, carrying out design and management by using an Excel file, and associating with a CATIA design table after modifying model parameters to obtain a part model required by a user. And then loading the components in the component library into an assembly design, and arranging and assembling the components in a project file after modifying the model parameters to form the three-dimensional model of the complete electrostatic precipitator.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (7)
1. The three-dimensional model construction method of the electrostatic precipitator based on the CATIA is characterized by comprising the following steps of:
step one, classifying components of an electrostatic precipitator, namely dividing the components of the electrostatic precipitator into an anode tube, a cathode wire, a cathode frame, an insulator, a fixed plate and a connecting plate, and determining the naming numbers of the components;
step two, component parameter design, defining geometric and non-geometric attribute information of a control three-dimensional model into parameters;
step three, creating parameterized components, and constructing a three-dimensional model of each component according to a scheme on a design drawing based on the step one and the step two, so as to construct the parameterized components;
(1) Part features based on a design drawing are created according to geometric features of the component, a basic contour line is created, stretching boss, rotation and groove features are created, and a component entity model is created according to component parameters;
(2) Establishing a parameterized function library, converting physical characteristic parameters into model characteristic parameters, defining user parameters and formulas, and completing the establishment of the parameterized function library, wherein each formula respectively links system parameters with corresponding user parameters, so that the purpose of driving a three-dimensional parameter model by the user parameters is achieved;
step four, creating a parameter table, firstly storing data related to the model in a corresponding file in a form of a table, and then associating the parameters of the model with the data in the table by utilizing a design table tool, wherein the model can be driven by selecting different data in the design table tool;
step five, building a component library, classifying and summarizing all components related in the electrostatic precipitator model according to parameters and structures and the actual operation maintenance management requirements, building an electrostatic precipitator component family library, uniformly managing various types of families, and continuously updating and supplementing;
step six, constructing a three-dimensional model, namely loading component families in a component library into projects according to structural forms of electrostatic precipitators in different engineering projects, and arranging and assembling the component families in project files after modifying model parameters to form a complete three-dimensional model of the electrostatic precipitator.
2. The three-dimensional model construction method of the CATIA-based electrostatic precipitator according to claim 1, wherein: in the first step, the component name is named by Pinyin letters in CATIA.
3. The three-dimensional model construction method of the CATIA-based electrostatic precipitator according to claim 1, wherein: in the step (1) of the third step, the process of building the component entity model according to the component parameters should follow the following sequence: anode tube-fixing plate-connecting plate-cathode wire-cathode frame-insulator.
4. A three-dimensional model construction method for a CATIA-based electrostatic precipitator according to claim 1 or 3, characterized in that: in the step (1), in the process of building the component entity model according to the component parameters, symmetrical positioning is performed according to the origin and the center reference, and the modeling sequence is from bottom to top and from left to right.
5. The three-dimensional model construction method of the CATIA-based electrostatic precipitator according to claim 1, wherein: in the fourth step, the format of the parameter table may be a text format or an Excel table file.
6. The three-dimensional model construction method of the CATIA-based electrostatic precipitator according to claim 1, wherein: before the fifth step, the behavior of each parameter testing component is debugged one by one, and whether the component parameters can drive the change of the model is checked.
7. The three-dimensional model construction method of the CATIA-based electrostatic precipitator according to claim 1 or 6, wherein: in the fifth step, the purpose of changing the external shapes of different data of the model is achieved by selecting different sets of parameter data of the model in the table, so that a part model required by a user is newly built, a catalyst Browser command is selected from a tool menu under a CATIA assembly interface, a component library selection frame is popped up, and finally corresponding parts are selected in the list, previewing of various standard component libraries occurs, and corresponding sections are selected according to requirements when designing.
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