Abstract
This paper describes the methodology of how to determine operation planning for an NC turning in an integrated CAD/CAM system. It is recognized that the operation planning is one of the postprocessors of a process planning and it generates the machining data, such as tools selection, cutting sequence, cutter path, machining condition and other technological information. From the point of realizing an integrated CAD/CAM system, it is required that the operation planning system should be connected to a geometric modeler. Here 3-D geometric modeler TIPS-1 is adopted for this purpose and theNC turning oriented geometry data is automatically generated from the 3-D geometry data of TIPS-1. And for the determination of planning for the operation, the new concept REMOVAL PRIMITIVE is introduced. The Removal Primitive is constructed from the combination of an element of removal geometry area and a set of cutting tools which can remove this area. So the methodology of the planning is to generate the set of Removal Primitives, to decide the every removal areas, to select the cutting tool and its usage sequence and to generate the cutter paths. Furthermore, from available usage of this Removal Primitive, re-clamping, re-chucking and machining condition data put out.
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