摘要
逆向工程(Reverse Engineering)主要的步骤包括点云的获取与预处理,曲面重构,模型重建及数控加工等技术。为了探索含有自由曲面特征的叶轮在逆向设计过程中点云处理及曲面重构的的关键技术,验证相关的预处理方法与曲面重构的原理。文章以叶轮叶片作为研究对象,利用随机滤波的方法对激光线扫描法获取的数据进行噪声点处理,去除了点云中的多余数据及随机噪声,分析了曲面重构的原理并通过NURBS曲面操作方法完成了叶片的曲面重构,得到叶轮整体的三维模型。最后,对通过逆向得到的叶轮模型进行了精度检测与验证。研究结果表明,利用逆向工程技术提高了产品的设计质量,缩短了研发周期。
Reverse technology＇s main steps include acquisition and preprocessing of point cloud,surface reconstruction,model reconstruction and nc machining technology. To explore the key technologies of point cloud processing and surface reconstruction in reverse design process of impeller with free-form surface feature to validate the relevant pretreatment method and the principle of surface reconstruction,this study uses impeller as the research object. Random filter algorithm was used to deal with the point cloud data collected via laser line scan,to remove the excess in the point cloud data and random noise. The principle of surface reconstruction was analyzed. Through the operation method of NURBS surface,blade surface reconstruction was finished,and 3D model of the impeller was obtained. Finally,the test precision was examined and verified. Result shows reverse technology can improve product design quality as well as reduce the RD cycle.
出处
《轻工机械》
CAS
2015年第4期76-80,共5页
Light Industry Machinery
基金
上海市085内涵建设项目"数控测量技术实验室"(nhjx-2014-11)
关键词
曲面重构
逆向工程
点云预处理
精度检测
surface reconstruction
reverse engineering
preprocessing of point cloud
precision testing
