Method for the manufacture or repair of a blisk by linear friction welding
AssigneeROLLS-ROYCE plc
InventorsJohn B Brownell, Peter J Gillbanks, Richard J Hawkins, Jonathan P Throssell, James R Wilson
Life of this patent
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Abstract
A method of making a BLISK by linear friction welding, comprises providing a stub on the circumferential surface of a turbine disk and defining a weld joint surface on the radially outermost face of the stub. The weld joint surface follows the annulus curvature in axial and circumferential directions while remaining flat in a third direction. A blade is applied radially to the stub and linear friction welding of the blade to the stub is effected by oscillating the blade in said third direction while applying a welding force inwardly along the blade.
Claims6
A method for the manufacture or repair of a BLISK in which a blade is attached by linear friction welding to a disk having a tapering peripheral surface, comprising forming on the disk and the blade weld joint surfaces which during welding are urged into contact by a weld force, causing linear oscillation of the blade relative to the disk in a predetermined direction while simultaneously applying said weld force,
- characterised in that:
- the disk weld joint surface is formed on the upper surface of an upstanding stub on the circumferential periphery of the disk at a substantially constant height above the disk periphery surface, the shape of the stub weld joint surface in axial and circumferential directions being determined according to an intersection of a blade envelope with a tapered periphery of the disk, and in a third direction by a locus of a straight line parallel to the predetermined direction of welding oscillation, and forming on the blade a weld joint surface complementary to the surface on the stub.
Dependencies are inferred from the claim text.