The Application Of Reverse Engineering In The Shroud Model Construction Of Motorcycle

Reverse engineering, as a relatively independent category in CAD, is an important technique in the tendency of digital and rapid response manufacture. Being pioneering, integrated and comparatively practical, reverse engineering has become an indispensable technique in product exploitation. Reverse engineering can enhance the precision of design, produce high quality model and shorten the cycle of design and manufacture. As a result, it holds out broad prospects for application and is thought highly of in both industrial and academic circles in many countries. The key techniques of reverse engineering are researched and applied to shroud model reconstruction of motorcycles in this thesis.The key techniques of reverse engineering include: data acquisition, data processing and model reconstruction. The fundamental principles of various kinds of measuring methods are analyzed and compared in the thesis. By researching on the techniques of data processing, the general manipulation flow of data processing is explored. Smoothness and its evaluation are discussed on the basis of the understanding of the basic theories of curves and surfaces.In light of the characteristics of shroud parts of motorcycles, the shroud model reconstruction of motorcycles is completed with reverse engineering. The data is collected with COMET 400 optical scanner efficiently and accurately. The data processing of shroud parts of motorcycles is done with PolyWorks, which results in an integrated and accurate data convenient for model reconstruction. Taking advantage of the combination of Imagewarel2 and CATIA, the shroud model reconstruction of motorcycles is conducted and the specific problems of it such as smoothness, smoothness evaluation, symmetry of parts and reconstruction of CAD model are discussed respectively.The research indicates that the shroud model reconstruction of motorcycles, completed with reverse engineering, is an effective technique, which can bring abouthigh quality model and improve efficiency and have great actual and practical value.