Method for making a laminated structure and aircraft provided with such a structure
To make a laminated structure comprising a panel made of composite materials and placed flat against at least one metal plate, the panel and the plate are presented in a stack, this stack is drilled to form a fastening borehole, a fastening rod is introduced into the bore and the fastener is fixed. In the invention, during the drilling, a negative clearance is made between a diameter of the bore and a diameter of the fastener, and when the fastener is being introduced, it is introduced from the metal plate. This mode of action prompts a positive interference that promotes the lasting nature of the fastener.
1 . A method for making a laminated structure, this structure comprising, in a stack, a panel made of composite material wherein:
the panel is presented as a stack,
the stack is drilled to form a fastening bore-hole,
a round fastener rod is inserted into the bore, and
the fastener is fastened,
wherein
during the drilling, a negative clearance is made between a diameter of the bore-hole and a diameter of the fastener, and
when the fastener is being introduced, it is introduced from the panel and pulled towards a reaction plate.
2 . A method according to claim 1 , wherein
the negative clearance is less than 0.6% of the value of the diameter of the rod.
3 . A method according to claim 1 , wherein
the negative clearance is equal to 0.3% of the value of the diameter of the rod.
4 . A method according to claim 1 , wherein
the panel made of composite material is a carbon fiber panel.
5 . A method according to claim 1 , wherein
prior to the drilling, the panel is placed between two metal plates.
6 . A method according to claim 1 , wherein
the metal of a plate is aluminum.
7 . A method according to claim 1 , wherein
the laminated structure is formed out of several panels made of composite material, and out of metal plates interposed between the panels.
8 . A method according to claim 1 , wherein
to introduce the fastener, a pulling hoist device is placed on the side of the bore-hole opposite the side by which the fastener is introduced,
the hoist device is provided with a reaction base with a pulling hole,
the pulling hole has a diameter greater than or equal to the diameter of the fastener.
9 . A method according to claim 1 , wherein
the panel is presented as a stack placed flat against at least one metal plate.
10 . An aircraft comprising a laminated structure made according to the method that is the object of claim 1.