This paper proposes a volume decomposition approach to building an interface which bridges the gapbetween a 3D CAD model and an automated process planning system. The volume decompositionapproach partitions the whole machining volume, which needs to be removed from the raw materialto produce the finished part, into some machinable features. Once the machinable features of a partare found, the machining of the part can be viewed as material removal for a series of machinablefeatures. The tasks involved in volume decomposition are: (1) extraction of machining volume fromthe part model; (2) decomposition of the machining volume into machinable features; and (3)determination of procedures required for cutting out the machinable features. By means of a volumedecomposition process, we can effectively and efficiently resolve the problem of interfacing CADwith a process planning system. An even more noticeable property of such a decomposition approachis concerned with its sound regard to the design model which comprises both depression andprotrusion features. A prototype system, which integrates altogether feature-based design, volumedecomposition and NC planning, is presented in this paper as well to validate the proposed approach.
展开▼
