Method for making a structural part of a composite material having a calibrated thickness and structural part thus obtained

A method for producing a structural part made out of composite material including structural plies made out of fibres in a cured resin, said structural plies being capable of resisting strains likely to be applied to the part in use, said structural part having, in at least one area, a predetermined thickness Enom, defined with production tolerances, said method comprising:

• a) applying the structural plies, said structural plies having, when the resin has been cured, a total thickness Es, called structural thickness, in said predetermined thickness area;
• b) applying, on at least one side of structural plies, at least in the predetermined thickness area, one or several plies, which are not required for the structural resistance, called calibrating plies, such as a thickness ΔE of said calibrating plies being at least equal to the minimum value of Enom minus a thickness esm equal to a minimum value capable of being obtained and accepted for the structural thickness Es;
• c) connecting structural plies and calibrating plies;
• d) when a total thickness of the part in area considered, corresponding to the thickness Es added to the thickness ΔE, is higher than the maximum value accepted for Enom, calibrating the thickness of part by machining the calibrating plies so that the total thickness of said part in said area is in an accepted tolerance interval for Enom.