Feature Extraction from Non-Linear Geometric Models in Design-for-Manufacturing University of Wisconsin-Madison

Format:

Conference/Event

Author/Creator:

Sonthi, Ratnakar, author.

Conference Name:

International Off-Highway & Powerplant Congress & Exposition (1994-09-12 : Milwaukee, Wisconsin, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1994

Summary:

Automatic manufacturability analysis of injection moldings, sheet metal castings, stampings, forgings, et cetera, using knowledge-based heuristics depends on shape features, which are abstractions of the three dimensional (3D) geometric model of the parts. Conventional CAD systems do not explicitly contain shape feature information, therefore such information needs to be extracted from them. So far, extraction of shape features has been restricted to models with simple geometric shapes such as planar, cylindrical or conical shapes. Extending shape feature extraction to non-linear geometric models will allow Design For Manufacturability (DFM) analysis of non-linear models. This paper presents an approach to extract features from non-linear geometric models. The approach is based on abstract geometric entities called C-loops. The formation of a C-loop depends on a geometric entity called a silhouette. The C-loops are derived from the silhouette boundaries of an object. This paper presents an algorithm to detect silhouettes on non-linear surfaces and describes how the detected silhouettes can be used for feature extraction

Notes:

Vendor supplied data

Publisher Number:

941672

Access Restriction:

Restricted for use by site license