Drilling device and drilling method used with such a device

1. A drilling method using a drilling device comprising a rotating tool and a drilling machine capable of turning the tool in rotation, and lubrication means capable of lubricating the rotating tool, said drilling device further comprising:

an intermediate chamber for storage of chips produced during an elementary drilling operation;

introduction means, for introducing said chips into the intermediate storage chamber during the elementary drilling operation, said introduction means being designed so as to operate other than by generating an airflow;

a main chamber for storage of chips communicating with the intermediate storage chamber; and

scavenging means capable of generating an airflow scavenging said chips,

the drilling method comprising said elementary drilling operation performed using the rotating tool and the drilling machine, and a lubrication operation of the rotating tool performed using the lubrication means, said lubrication operation being performed during the elementary drilling operation,

wherein said elementary drilling operation is performed using said introduction means, without activating said scavenging means, and said elementary drilling operation is followed by an airflow scavenging operation of the chips stored in said intermediate storage chamber via said introduction means during said elementary drilling operation, said scavenging operation being performed with said scavenging means such that the chips are scavenged from said intermediate storage chamber towards said main storage chamber.

2. A drilling method according to claim 1 , wherein said introduction means are composed of an adapted shape of the rotating tool, which automatically drives the chips produced towards the intermediate storage chamber close to this tool.

3. A drilling method according to claim 2 , wherein the rotating tool is provided with helical flutes so that an <<Archimedes screw>> type effect can be obtained.

4. A drilling method according to claim 3 , wherein said rotating tool has a part with flutes and a central part fixed to the part, a junction area between the central part and the fluted part being located inside said intermediate storage chamber.

5. A drilling method according to claim 1 , wherein said scavenging means comprise suction means and blowing means.

6. A drilling method according to claim 5 , wherein said suction means are in the form of a Venturi effect suction system, said system communicating with said intermediate chamber for storage of chips.

7. A drilling method according to claim 6 , wherein said Venturi effect suction system integrates said main chamber for storage of chips.

8. A drilling method according to claim 5 , wherein said suction means are coupled to a pneumatic solenoid valve for producing a sequential suction.

9. A drilling method according to claim 5 , wherein said blowing means are in the form of a compressed air supply communicating with said intermediate chamber for storage of chips.

10. A drilling method according to claim 1 , wherein said lubrication means are designed so as to enable lubrication by micro-atomisation of straight oil.