Method and apparatus for forming diffused cooling holes in an ai

Details Method and apparatus for forming diffused cooling holes in an ai Method and apparatus for forming diffused cooling holes in an ai

1977-09-19

1980-04-08

Reynolds, Bruce A.

Electric heating

Metal heating

Cutting or disintegrating

219 69M, B23P 112

Patent

active

041974433

ABSTRACT:
The electrode of an electrodischarge machining apparatus has a plurality of teeth which are substantially laterally tapered to increasing width toward the machine-held base end. Further, the plane of the tapered portions is inclined to that of the free end portions, which precede the tapered portions in application to the airfoil surface to be machined. As the tapered and inclined portions are inserted into the airfoil surface, a plurality of holes are formed which are diffused in both lateral directions and in one longitudinal direction to thereby provide a diffused hole with improved film cooling effectiveness.

REFERENCES:
patent: 2901588 (1959-08-01), McKeilnie
patent: 3271848 (1966-09-01), Moutandon
patent: 3527543 (1970-09-01), Howald
patent: 3814893 (1974-06-01), Helms et al.
patent: 3894925 (1975-07-01), Inoue

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