Abstract
This paper presents a scheme to automate the entire process of tolerance charting. An object-oriented database called TOLCHAIN is developed to support this scheme. TOLCHAIN stores all the necessary information for tolerance charts to determine the intermediate machining tolerance values automatically. It is assumed that the part is stored as a boundary model. Feature volumes are then constructed from the boundary model to perform the tool accessibility analysis and to determine the process sequence. The intermediate machining tolerances are derived automatically from the boundary model.
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