Abstract : Our PhD work comes within the framework of the USIQUICK RNTL project (www.usiquick.com) that aims to answer the needs of some aircraft industries in the domain of structural parts manufacturing that are of an average to high complexity. Automating the manufacturing fixture, process planning and generating the NC programs are the expected results. Our contribution lies in the study of the ‘Transformer', a module dedicated to enriching the part geometry into one that is adapted to manufacturing. The ‘Transformer' must supply the necessary information needed by the two other USIQUICK modules: Process planning and Automatic milling path generator.
The sequence of steps allowing to compute the different functions is determined. It includes:
- a first step during which the CAD geometrical model is enriched,
- a second step during which the different ‘Elementary Manufacturing Features' are extracted. The faces composing the CAD model are completed by their: milling mode, milling directions and possible milling tools,
- a last step, where a face adjacency' graph analysis is proceeded, pointing all the faces that could be milled simultaneously.
These steps are implemented using CAA® in a prototype. The validity is presented in some examples. The degree of its robustness is evaluated.
The main results of our PhD are: the definition of the ‘Elementary Manufacturing Feature', high level milling features extractions, thin features identification and the CAPP functions definition.
This PhD report ends with a synthesis of the functions that should be implemented in CATIA so that the ‘Transformer' becomes an industrial product.