Impeller Blade Modeling Research Based on Reverse Engineering

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.