Patent ID: 8434962

Claim:
A friction welding joint of comprising at least a lower two-dimensional component and an upper two-dimensional component positioned on top of the lower two-dimensional component, the joint comprising: a connecting body having opposed first and second ends, with a collar formed at the first end, the collar having opposed upper and lower surfaces, wherein the lower surface rests on a top surface of the upper component, wherein the connecting body further includes: a tube piece formed at the lower surface of the collar and extending to the second end of the connecting body, a hollow cylindrical space formed inside the connecting body and extending from the first end thereof to the second end thereof, an annular cutting edge formed at the second end of the connecting body, and including a funnel having a truncated conical shape extending between the annular cutting edge and the hollow cylindrical space, wherein the annular cutting edge penetrates through the top surface of the upper component to a top surface of the lower component by rotation and pressure, and the connecting body, after cutting through the upper component, accommodates cut-out material of the upper component in the hollow cylindrical space thereof, and wherein the funnel of the annular cutting edge and the to surface of the lower component deform to create a friction welding zone by rotation and pressure of the annular cutting edge against the top surface of the lower component.