Metal deforming – With cutting – Machining after final metal-deforming
Patent
1977-04-25
1978-06-20
Larson, Lowell A.
Metal deforming
With cutting
Machining after final metal-deforming
291568B, B21K 304
Patent
active
040954510
ABSTRACT:
In a method and equipment for refurbishing gas turbine blades a portion of each blade extending from the tip is rolled under pressure, the direction of rolling being towards the tip, to effect extension of the tip, after which the extended tip is machined to a predetermined overall length of the blade, the rolling being effected between a pair of rollers, one with a convex profile and the other with a concave profile corresponding to the inside and outside respectively of the aerofoil section of the blade, one roller being fixed and the other roller being movable by pressure applying means towards the fixed roller, a carrier for the blade being rotatable and slidable in a guide aligned with the position of closest approach of the rollers, and driving means being provided for rotating the fixed roller such that its periphery moves through the position of closest approach in a direction towards the guide for the carrier.
REFERENCES:
patent: 2925649 (1960-02-01), Boon
patent: 4028787 (1977-06-01), Cretella et al.
Bramah Limited
Larson Lowell A.
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