Patent ID: 9707640
Date: 2017-07-18
CPC Classifications: B23K

Claim:
1. A vibration dampening device for manufacturing a turbomachine rotor by rotational friction welding, said rotor comprising a first disc and a second disc extending coaxially along a main axis of the rotor, each disc comprising a hub having an internal surface, the device comprising: a first clamping device configured to be positioned coaxially to the hub of the first disc and including a pair of radially opposite jaws suited to come into contact with the internal surface of said hub of the first disc, a hydraulic block which radially displaces each of the jaws between a rest position, in which the jaws are retracted, and a clamping position, in which the jaws are extended radially from the rest position in order to come to bear against the internal surface of the hub, a rod extending along an axis of the vibration dampening device, and a support connected to the rod and extending radially from the rod, the support being stationary and provided with a pad with a shape complementary to the internal surface of the hub, wherein each of the jaws has a radially external surface configured to come into contact with the internal surface of the hub, said radially external surface being covered with a lining made from a material able to dampen vibrations, wherein the jaws have a length of a magnitude of about a third of an inner diameter of the hub and a thickness of a magnitude of about two millimeters, wherein the radially external surface of the jaws and an outer surface of the pad are circumferentially concentric about the axis of the vibration dampening device, wherein, the jaws are disposed on lateral sides of the support, and wherein circumferential spaces are provided between the jaws and the support.