Associative modeling of machining processes using feature based solid part models

Associativities with models of feature machining ensure automatic modification of cutting tool cycles as an effect of the modification of the part model. This paper describes research for associative integration of part and part-manufacturing modeling. The authors applied their well-proved feature-driven and Petri net representation-based machining process modeling. In order to gain associative models, they analyzed the effects of changes of part models on manufacturing process models. This is a major problem in practice, because present-day models are not fully suitable for high-level associativity. The feasibility of manufacturing is communicated actively with part design by constraints from part manufacturing processes and production systems. On the other hand, the method is based on generic manufacturing models that describe variants, so that a new process variant can be created for changed part design by using the same process model. The method assumes a unified solid model with topology-controlled identification of surfaces and a re-orderable form-feature-based part model. Firstly, basic concepts and objectives of the research are introduced. Related issues of part and manufacturing process modeling are outlined and the concept of integrated modeling is emphasized. Following this, relationships between part and part-manufacturing processes are detailed. Next, the handling of the effects of part model changes and the implementation of the proposed modeling are discussed. Finally, possible contributions to the enhancement of the modeling capabilities of present-day CAD/CAM technology are discussed