Process for repairing damaged blades of turboengines

Details Process for repairing damaged blades of turboengines Process for repairing damaged blades of turboengines

1994-08-05

1996-01-02

Cuda, Irene

Metal working

Method of mechanical manufacture

Impeller making

298897, 228119, B23P 1500

Patent

active

054797047

ABSTRACT:
A repair process for blades of turboengines damaged in the head or edge regions in which the damaged regions are first separated to leave an undamaged blade stump with an exposed, repair surface. The repair surface of the blade stump is prepared for butt welding and a repair plate of constant thickness which exceeds the maximum profile height of the blade by more than 50% is provided with a front surface adapted to the repair surface. This front surface of the repair plate is abutted against the repair surface and the blade stump and the repair blade are then butt welded. The weld joint and the repair plate are machined to the profile contour of the blade stump and to the desired blade profile. This process is used for the repair of blades of integral rotor disks of turboengines, particularly for blades of integral compressor impellers.

REFERENCES:
patent: 4832252 (1989-05-01), Fraser
patent: 4873751 (1989-10-01), Walker et al.
patent: 4883216 (1989-11-01), Patsfall
patent: 5031313 (1991-07-01), Blan et al.
patent: 5062205 (1991-11-01), Fraser
patent: 5092942 (1992-03-01), Fraser et al.
patent: 5142778 (1992-09-01), Smolinski et al.
patent: 5188275 (1993-02-01), Daines
patent: 5351395 (1994-10-01), Crawmer et al.
Jurgens, W. "Situation of welding in engine maintenance", German Society for Welding Technology, Report Series 85, 1978, pp. 72-79. (DVS-(Deutscher Verband fur (Schweisstechnik) Berichtsband 85, 1978, S. 72 ff).
German Industrial Standard DIN 65 118, Part 2, p. 7, Table 3. (in German).

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