Patent ID: 8656593

Claim:
A process for assembling a part made of metal material and a part made of composite material, with a junction between said parts being made by means of a fastener with an approximately constant cross section that fits into a first hole made in the part made out of metal material and a second hole made in the part made out of composite material, wherein prior to assembling said parts, the process includes: an expansion step in which an expansion tool has an outer diameter Ø b greater than a diameter Ø 1 of said first hole and less than a diameter Ø 2 of said second hole so as to generate solely a field of compressive stresses on a periphery of said first hole and locally in the material of which the part made of metal material is composed; a single boring step to make said first hole and said second hole in order to obtain a diameter Ø final approximately greater than the diameter of the fastener so as to leave an interstice between an inner wall of said holes and an outer surface of the fastener, an assembly step to position the fastener in said holes to hold the metal part and the composite part together.