Multi-layer Materials. Qualitative Approach of the Process

The increasing part of multi-layer materials in the aerospace industry has created new machining problems. Indeed it is very difficult to machine these materials, particularly to drill them because they consist of materials with very different nature stacks, as strongly heterogeneous materials, such as carbon fibre composite, and materials monolithic, such as aluminium and titanium. The choice of cutting tool should be a compromise, to withstand high temperature involved during titanium drilling, as well as highly abrasive carbon fibre, while allowing the acquisition of drilling of aircraft grade.