Efficient algorithms for automated process planning of 2.5D machined parts considering fixturing constraints

Abstract

In this report, algorithms that perform automated set-up sequencing and fixture planning for prototype machining of 2.5D machined parts using three-axis milling and drilling are presented. A framework for the integration of efficient set-up sequencing algorithms with algorithms for fixture planning is developed. At a higher level of abstraction, these algorithms can be applied for automated process planning of 2.5D parts irrespective of the nature of fixturing elements used. The application of these algorithms to situations where standard fixturing elements, such as parallel-sided vices and toe-clamps, are used is also discussed. In addition, an improved version of an existing algorithm for fixture planning using toe-clamps is presented. The algorithms have been implemented as part of a feature-based CAD/CAM environment.