火箭推进

针对某新型液体火箭发动机三维模型装配技术应用现状,不同三维建模工具之间数据格式互不兼容,不能相互调用,以及在产品数据管理系统中,异构CAD三维模型装配无法自动生成产品BOM结构,装配信息无法跨软件进行传递。对Pro/E与NX三维模型相互调用、异构三维模型装配、产品BOM结构自动生成、更改同步等问题进行了研究,采取轻量化模型JT和中间格式进行装配实现异构CAD三维模型的装配和管理,采用轻量化模型JT装配方法,既可以保证JT与三维模型的一致性,也可以实现装配BOM结构的自动生成和更新。采用STEP中间格式进行装配,解决了产品数据管理系统中对轻量化模型转换控制,降低了CAD集成环境下异构三维模型的装配要求,确保了STEP文件与三维模型的一致性,实现了异构CAD三维模型在统一环境下BOM结构的自动更新和发动机技术状态的管控。

In view of the application status of liquid rocket engine 3D model assembly technology, the data formats of different 3D modeling tools are incompatible with each other and cannot be by called each other.In the management system of product data, the heterogeneous CAD 3D model assembly cannot automatically generate the product BOM structure, and the assembly information cannot be transmitted across software.The problems are studied in this paper, such as the study on the mutual transfer for Pro/E and NX 3D structure, the assembly of heterogeneous 3D structure, automatic generation of product BOM structure, and the synchronization of changes.The lightweight model JT and intermediate format are adopted to realize the assembly and management of heterogeneous CAD 3D models.Adopting the lightweight model JT assembly method can not only ensure the consistency between JT and 3D assembly model, but also realize the automatic generation and update of assembly BOM structure.The STEP intermediate format is adopted for assembly, which solves the conversion control of lightweight models in the management system of product data, reduces the assembly requirements of heterogeneous 3D models in the CAD integrated environment, ensures the consistency between STEP files and 3D models, and achieves the automatic update of BOM structure of heterogeneous CAD 3D models and the control of engine technical status in the unified environment.

引言
1 产品数据管理系统
2 异构CAD模型装配
3 应用效果
4 结束语

表1 三维模型属性信息<br/>Tab.1 Attribute information title of 3D model

表1 三维模型属性信息
Tab.1 Attribute information title of 3D model

图1 异构CAD三维模型装配<br/>Fig.1 Heterogeneous CAD 3D model assembly

图1 异构CAD三维模型装配
Fig.1 Heterogeneous CAD 3D model assembly

表2 Pro/E与NX转换STEP特征情况<br/>Tab.2 Conversion STEP feature for Pro/E and NX

表2 Pro/E与NX转换STEP特征情况
Tab.2 Conversion STEP feature for Pro/E and NX

图2 异构CAD模型自适应装配流程<br/>Fig.2 Adaptive assembly process of heterogeneous CAD model

图2 异构CAD模型自适应装配流程
Fig.2 Adaptive assembly process of heterogeneous CAD model

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备注

引言

1 产品数据管理系统

2 异构CAD模型装配

3 应用效果

4 结束语

期刊信息