CAPPED - A TOLERANCE-BASED FEATURE SEQUENCING CAPP SYSTEM

The paper explains the implementation of the concept of workpiece control, in particular dimensional and geometric control, in planning the machining sequence and in designing location systems for prismatic parts with three types of machined features: plane surfaces, steps and slots. The system developed is capable of generating the required process properties for all machining operations and incorporates a tolerance charting facility for analysing all dimensions produced by the process. Though at present the system is limited in capability, it is capable of development into a practical CAPP system.