Drilling device and method for adjusting cutting operational parameters during drilling of a multilayer element

A drilling device that is to be implemented to carry out at least one operation for drilling an element to be drilled by using a cutting tool comprising drill margins and cutting edges, said device comprising:

• means for determining at least one load value representing overall drag due to internal friction of said drilling device and to friction of said drill margins in said element to be drilled, these means for determining comprising:
• means for stopping a drilling operation in progress;
• means of partial retraction of said cutting tool on a predetermined distance, said predetermined distance being chosen such that said cutting edges are no longer in contact with said element to be drilled while the drill margins are always inside a hole being drilled in the element to be drilled;
• means for driving said cutting tool with predetermined cutting parameters;
• means for measuring at least one load value during the driving of said cutting tool with said cutting parameters before its cutting edges again come into contact with said element to be drilled and after stabilization of said load values, said at least one measured load value representing said overall drag.