METEX—An expert system for machining planning

Abstract

Optimal selection of process parameters is an important problem faced by most process planners and NC programmers. Computerized systems and mathematical models are available in literature for machining parameter selection. These systems are usually constructed with compiled handbook data. The machining process is non-linear and exhibits piecewise behaviour within different cutting ranges. If this piecewise behaviour can adequately be represented in machinability parameter selection systems, more insightful selection of cutting conditions can be achieved. The present paper provides a comprehensive survey of existing literature on machinability parameter selection systems, followed by a literature-based analysis of the anomalies of machining and the process and material effects in machining. A justification of expert systems for qualitative modelling is provided. A prototype system (METEX) for machining parameter selection is then discussed. This system uses production (FF-THEN rules to qualify machining at...