Idris, Mohd. Hasbullah and Lee, Chung Sin (2006) Hybrid modelling of automative turbocharger impleller by reverse engineering approach. In: Advances in Mechanical Engineering Part 2 - 2006. Penerbit UTM, Johor , pp. 1-40. ISBN 978-983-52-0543-9
Reverse engineering (RE) is a process to reproduce the shape of a component under scrutiny with detail measurements. The implementations of RE by sophisticated technology lead to enormous benefits including simplification of complex measurements, reduction of modelling costs, improvement of accuracy and reduction of analysis time. The procedure adopted will depend highly on the intricacy of the part. On the other hand, the quality of the reconstructed model depends on the accuracy of the measured point data and the digitising device (Son et al., 2002). CMM is the dominant tool used in high accuracy 3D measurement and digitising. However, latest 3D laser scanner appears to be a new technique to obtain the dimension of the part in RE. CMM is normally used for measuring and modelling of engineering components whilst 3D laser scanner concentrates more on free form surface modelling. CMM measures the part with probe as 3D laser scanner uses laser beams to scan across the surface of components. These two systems is able to generate graphical representation of the part with points and lines. With the aid of software, curves and surfaces in three dimensional model can be generated by rendering. The model can be exported in DXF or IGES format into CAD or CAM system for further processing and analysis. However, it was found that in some cases the converted data contains errors. This project addresses the RE approach in reproducing an automobile component, i.e. turbocharger impeller. Turbocharger impeller is an air boost devices to increase combustion air through density, thereby increase the power and responsiveness of internal combustion engines (Decker and Roby, 2005). The actual impeller had been measured respectively with CMM and 3D laser scanner. A silicon rubber impeller blade replica was then used for ease of measurements. The data from both measurements were compared. “Superimposing” approach (hybrid modeling) was then carried out to generate the impeller profile. CMM data were exported into 3D laser scanner data file to select the best points for profile generating.
|Item Type:||Book Section|
|Subjects:||T Technology > TJ Mechanical engineering and machinery|
|Deposited By:||Liza Porijo|
|Deposited On:||23 May 2012 07:38|
|Last Modified:||24 May 2012 00:42|
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