液体火箭发动机设计工艺可行性研究

Research on the Feasibility Analysis of Design Technology for Liquid Rocket Engine

分析了液体火箭发动机产品实现设计工艺特性,应用模型定义(Model based Definition,MBD)技术表征液体火箭发动机产品加工信息,在此基础上分析了设计工艺可行性审查实现技术途径,结合产品设计制造特点开发了液体火箭发动机面向制造的设计(Design for Manufacture,DFM)工艺性审查系统。该系统以MBD模型为载体,将发动机产品加工信息、尺寸信息、材料等属性信息通过PMI标注方式表达,开发模型检查工具,实现了在设计阶段对产品几何模型进行自动化工艺检查的目标,对产品工艺可行性进行了分析。通过与工艺规则库匹配,给出设计人员检测分析结果,供设计人员进一步优化改进设计。通过采用工艺可行性分析手段,在设计阶段提升了产品的工艺可行性,减少产品制造过程中的设计、工艺更改,缩短了产品研制周期。

The Model based Definition(MBD)technology digital process verification approach is examined.A process verification system for Design for Manufacture(DFM)is introduced.The system uses PMI,or product and manufacturing information,as a vehicle to express product processing information and dimensional information.In the concept design phase,the auto-matic process testing of the product geometry model is realized,and the viability of the product process is examined,thanks to the development of the model testing tool.The test's outcome is evaluated in accordance with the guidelines for producing liquid rocket engines.The designer can adjust and enhance the sketch of the geometry for the liquid rocket engine in light of the outcome.By using DFM,the process accessibility of the product in the design phase is improved,the design and process changes in the product manufacturing process are reduced,and the product development cycle is shortened.