| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1701147 | Procedia CIRP | 2013 | 6 Pages |
The drilling of stacks made of carbon fibre composite material (CFRP) and metal (aluminium or titanium alloy) is an operation more and more common in aerospace industry. However, this critical machining operation is not yet fully controlled. The knowledge of the cutting forces and the wear phenomenon is an important issue to assure a good quality of the hole.The studies on the stack drilling usually do not break down the operations on both materials (CFRP and metallic alloy), which does not allow a full understanding of the impact of each part of the stack on the behaviour of tool, especially regarding its wear. Nevertheless, a study of the drilling of a single material does not lead us to the understanding of the stack drilling, because of the influence of a piece toward another.This study, firstly, discusses the drilling of each material of the stack, titanium alloy Ti6Al4 V and CFRP, individually. The impact of the local wear is assessed by investigating the variation of the cutting forces along the cutting edge (the computation is made by the decomposition of the thrust force and the torque during the progressive engagement of the drill point).Furthermore, this study explains the drilling of an alternation of titanium alloy and CFRP in order to model its effect on a stack, while allowing the analysis of the wear for each material.
