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160 Reverse Engineering – Recent Advances and Applications Yau, H.T. (1997). Reverse engineering of engine intake ports by digitization and surface approximation, Int. Journal of Machine Tools & Manufacturing, Vol.37, No. 6, pp. 855- 871, ISSN: 0890-6955 Yuan, X.; Zhenrong, X. & Haibin, W. (2001). Research on integrated RE technology for forming sheet metal with a free form surface, Journal of Materials Processing Technology, Vol.112, pp. 153–156, ISSN: 0924-0136 Zhang, W. (2003) Research into the engineering application of Reverse Engineering technology, Journal of Materials Processing Technology, Vol. 139, pp. 472-475, ISSN: 0924-0136 Zheng, J.; Li, Z. & Chen, X. (2004). Broken area modeling for repair automation, Journal of Advanced Manufacturing Systems, Vol. 3, No. 2, pp. 129-140, ISSN: 0219-6867
A Review on Shape Engineering and Design Parameterization in Reverse Engineering 1. Introduction 8 Kuang-Hua Chang The University of Oklahoma Norman, OK USA 3D scanning technology has made enormous progress in the past 25 years (Blais, 2004); especially, the non-contact optical surface digitizers. These scanners or digitizers become more portable, affordable; and yet capturing points faster and more accurately. A hand-held laser scanner captures tens of thousands points per second with a level of accuracy around 40 �m, and can cost as low as fifty thousand dollars, such as ZScanner 800 (ZCorp). Such technical advancement makes the scanners become largely accepted and widely used in industry and academia for a broad range of engineering assignments. As a result, demand on geometric modeling technology and software tools that support efficiently processing large amount of data points (scattered points acquired from a 3D scanning, also called point cloud) and converting them into useful forms, such as NURB (non-uniform rational Bspline) surfaces, become increasingly higher. Auto surfacing technology that automatically converts point clouds into NURB surface models has been developed and implemented into commercial tools, such as Geomagic (Geomagic), Rapidform (INUS Technology, Inc.), PolyWorks (innovMetric), SolidWorks/Scan to 3D (SolidWorks, Inc.), among many others. These software tools have been routinely employed to create NURB surface models with excellent accuracy, saving significant time and effort. The NURB surface models are furnished with geometric information that is sufficient to support certain types of engineering assignments in maintenance, repair, and overhaul (MRO) industry, such as part inspection and fixture calibration. The surface models support 3D modeling for bioengineering and medical applications, such as (Chang et al., 2003; Sun et al., 2002; Liu et al., 2010; Lv et al., 2009). They also support automotive industry and aerospace design (Raja & Fernades 2008). NURB surface models converted from point clouds have made tremendous contributions to wide range of engineering applications. However, these models contain only surface patches without the additional semantics and topology inherent in feature-based parametric representation. Therefore, they are not suitable for design changes, feature-based NC toolpath generations, and technical data package preparation. Part re-engineering that involves design changes also requires parametric solid models. On the other hand, shape engineering and design parameterization aims at creating fully parametric solid models from scanned data points and exporting them into mainstream
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REVERSE ENGINEERING - RECENT ADVANC
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Contents Preface IX Part 1 Software
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Preface Introduction In the recent
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Preface XI and con’s related to t
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Preface XIII the step-by-step appli
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Part 1 Software Reverse Engineering
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4 Reverse Engineering - Recent Adva
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10 Reverse Engineering - Recent Adv
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58 2. Model driven architecture: An
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62 Fig. 1. Model, metamodels and tr
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100 Reverse Engineering - Recent Ad
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108 Table 1. Number of smoothers an
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Integrating Reverse Engineering and
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Integrating Reverse Engineering and
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Part 3 Reverse Engineering in Medic
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238 5. Summary and discussions Reve
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268 Fig. 6. A closed polygon mesh r
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272 3. Results Reverse Engineering
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