摘要
金属封严环广泛应用于航空发动机密封系统,其型面成形质量对飞行器高性能、高可靠服役具有重要影响。然而,薄壁、复杂的异形截面与封闭的环形结构等导致其在几何质量检测方面存在以下问题:其一,成形结果严重依赖于破坏性抽样终检,实际产品均未经过完整质量检测;其二,成形过程无几何质量检测手段,无法及时发现成形缺陷,轮廓几何数据的缺失,使工艺优化设计困难。因此,提出一种金属封严环数字孪生几何模型框架,该框架包括:物理空间、虚拟空间、交互空间与服务,可提供在机测量平台标定、截面轮廓测量、点云数据预处理、截面几何特征计算、三维数模快速构建、三维型面动态测量与偏差计算等连续成形质量在线检测技术,建立起反映金属封严环成形过程中变化的数字孪生几何模型,从而为金属封严环成形质量的检测、分析、预测以及后续工艺优化设计所需的基础数据获取等提供支撑。在此基础上,研制了在线检测模拟试验装置与数字孪生软件,介绍了金属封严环数字孪生几何模型的应用情况。
Metallic sealing ring is widely used in aero-engine sealing systems,and its formed quality has an important impact on the aircraft service reliability.However,the thin-walled,complex irregular section and closed ring structure of sealing rings lead to the following problems:first,the formed results are heavily dependent on final destructive sampling inspection,and the actual products have not undergone complete quality inspection;second,there is no means of geometric quality inspection during the forming process,which makes it impossible to inspect defects in time,and the lack of geometric data makes the process optimization difficult.Therefore,a digital twin geometric model framework for metallic sealing rings is proposed,which includes four parts:physical space,virtual space,interaction space and services,and it can provide on-machine measurement platform calibration,section profile measurement,point cloud preprocessing,section geometric features computation,3-D digital model construction,3-D surface dynamic measurement,forming deviation computation and other continuous forming quality on-line inspection techniques,so as to build a digital twin geometric model that reflects the changes in the forming process and provides support for the inspection,analysis and prediction of the forming quality,as well as the acquisition of the basic data required for the subsequent process optimization and design.On this basis,an on-line inspection simulation test device and a digital twin software are developed,and their applications are introduced.
作者
裴昊男
张璞玉
罗明
PEI Haonan;ZHANG Puyu;LUO Ming(Key Laboratory of High Performance Manufacturing for Aero Engine,Ministry of Industry and Information Technology,Northwestern Polytechnical University,Xi′an 710072,China;Engineering Research Center of Advanced Manufacturing Technology for Aero Engine,Ministry of Education,Northwestern Polytechnical University,Xi′an 710072,China)
出处
《机械科学与技术》
CSCD
北大核心
2024年第7期1158-1167,共10页
Mechanical Science and Technology for Aerospace Engineering
基金
国家科技重大专项(2019-Ⅶ-0014-0154)。
关键词
数字孪生
几何模型
金属封严环
成形质量
在线检测
digital twin
geometric model
metallic sealing ring
forming quality
on-line inspection
