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A shape feature recognition framework and its application to holes in prismatic parts

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Abstract

A feature recognition framework is proposed, consisting of a feature definition part and a feature matching part and operating on a B-rep model. Feature definition consists of a unique name, of a feature template yielding feature geometry, and of a set of parameter-extracting procedures yielding shape parameters. A feature template is defined in terms of building blocks and their relationships and properties. Building blocks are defined mainly in terms of profiles, their outward indexes, the types of their edges (solid/void) and their orientation. Features are classified as main and auxiliary, the former being further classified as unique and non-unique. Feature uniqueness is ensured by using key blocks that do not share elements with other feature blocks. Patterns of identical features are also identifiable. These concepts were implemented in Prolog for hole features and tested for real engineering components.

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  1. Department of Mechanical Engineering, University of Manchester Institute of Science and Technology (UMIST), PO Box 88, M60 1QD, Manchester, UK

    G. C. Vosniakos & B. J. Davies

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  1. G. C. Vosniakos
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  2. B. J. Davies
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Vosniakos, G.C., Davies, B.J. A shape feature recognition framework and its application to holes in prismatic parts. Int J Adv Manuf Technol 8, 345–351 (1993). https://doi.org/10.1007/BF01751095

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