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Automatic Extraction of Three Dimensional Prismatic Machining Features From CAD Model

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Executive Summary

Machining features recognition provides the necessary platform for the Computer Aided Process Planning (CAPP) and plays a key role in the integration of Computer Aided Design (CAD) and Computer Aided Manufacturing (CAM). This paper presents a new methodology for extracting features from the geometrical data of the CAD Model present in the form of Virtual Reality Modeling Language (VRML) files. First, the point cloud is separated into the available number of horizontal cross sections. Each cross section consists of a 2D point cloud. Then, a collection of points represented by a set of feature points is derived for each slice, describing the cross section accurately, and providing the basis for a feature-extraction.

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