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Proceedings of CAD'15, 2015, 297-302
Defeaturing Sheet Metal Part Model based on Feature Information

Yogesh H. Kulkarni, Anil Sahasrabudhe, College of Engineering Pune, India
Ravi K. Gupta, Alain Bernard, Ecole Centrale de Nantes - IRCCyN CNRS 6597, France
Mukund Kale, Siemens PLM, Pune, India

Abstract. Complex models prepared in CAD applications are often simplified before using them in downstream applications like CAE, shape matching, multi-resolution modeling, etc. In CAE, the thin-walled models are often abstracted to a midsurface for quicker analysis. Computation of the midsurface has been observed to be effective when the original model is defeatured to its gross shape. Many existing defeaturing methods typically resort to syntactic pattern recognition or similar approaches to first recognize the features on the solid body represented by B-rep or mesh and then remove them and heal the gaps. In Feature-based CAD models, features being readily available and suppressible, the critical challenge remains of correct identification of them, based on the application context. Existing methods which leverage feature information appear to use the complete feature parameters to decide the suppressibility. This gives incorrect selections, as in many cases, some portion of the features are consumed and are not part of the final shape.

Keywords. CAD, Defeaturing, Sheet metal features taxonomy, Feature-based Design, Midsurface

DOI: 10.14733/cadconfP.2015.297-302