In a feature-based model, the features can be used in both part description and machining planning. In a feature-based machining, proper fixture setups are required for locating and holding a workpiece such that a set of features can be machinedin sequence. Previous research in fixturing design is focused on analyzing the final shape of the part without considering the successive intermediate steps and the operational precedence during machining. The purpose of this research is to develop afeature-based fixturing analysis system to determine the fixturing parameters required for the intermediate workpieces during a sequential feature-based machining. In a feature-based machining, an intermediate workpiece is produced after a feature ismachined. The fixturing setup may need to be changed at an intermediate step such that the subsequent features at different positions can be machined. This research develops a feature-based fixturing analysis method for designing the fixturing setups fora complete feature-based machining process. The machining parts considered are prismatic parts and the features are prismatic machining features including steps, slots, pockets, holes, blind steps, and blind slots. The output of the analysis can be usedin design and modelling of fixturing hardware, and also can be applied to evaluate the changeovers in fixturing setups in a successive feature-based machining. A software system is implemented using boundary representation as input and output format.Example parts are tested and discussed.
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