Boundary-conformed toolpath generation for trimmed free-form surfaces via Coons reparametrization

Yang, D, Han, Z, Chuang, J and Ding, S 2003, 'Boundary-conformed toolpath generation for trimmed free-form surfaces via Coons reparametrization', Journal of Materials Processing Technology, vol. 138, no. 13, pp. 138-144.


Document type: Journal Article
Collection: Journal Articles

Title Boundary-conformed toolpath generation for trimmed free-form surfaces via Coons reparametrization
Author(s) Yang, D
Han, Z
Chuang, J
Ding, S
Year 2003
Journal name Journal of Materials Processing Technology
Volume number 138
Issue number 13
Start page 138
End page 144
Total pages 7
Publisher Elsevier S.A.
Abstract In the process of CAD/CAM, predefined parametric surfaces are often subject to the operation of trimming or extending. In such a case, the original iso-parametric curves are no longer boundary-conformed. Consequently, they are not anymore suitable for being used as natural CNC toolpaths. In this paper a method to regenerate boundary-conformed iso-parametric toolpaths on altered free-form surfaces is presented. The main idea of this method is to fit the 2D parametric domain of the given trimmed surface with a 2D Coons patch. Then boundary-conformed toolpaths on the altered surface can be regenerated naturally via the iso-parametric curves of the Coons patch via a two-step mapping. The application of this method is successfully illustrated on a typical trimmed surface, a turbine blade. The applicability and limitations of this method are also discussed.
Keyword(s) boundary-conformed
coons patch
toolpath generation
trimmed surface
DOI - identifier 10.1016/S0924-0136(03)00062-1
Copyright notice © 2003 Elsevier Science B.V. All rights reserved.
ISSN 0924-0136
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