Method of manufacture of an article having internal passages

Details Method of manufacture of an article having internal passages Method of manufacture of an article having internal passages

1981-07-02

1983-07-05

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

20412943, 20412946, 204209, 204224M, B23P 100, B23P 110

Patent

active

043916848

ABSTRACT:
A method of manufacture of hollow turbine blades for gas turbine engines comprises forming them in two parts and brazing the parts together. This requires very accurate machining of the two faces of the parts which are to be joined prior to the brazing process. The invention provides a method of machining two confronting faces of parts of an article which are to be joined together. The method includes the step of passing an electrolyte linishing belt (2) FIG. 4 between the confronting surfaces of the two parts (10,11) and in contact with both faces simultaneously while passing an electric current between the parts. Thus one or both faces of the parts are machined using one as the former for the other.

REFERENCES:
patent: 2902584 (1959-09-01), Ullmann
patent: 3619389 (1971-11-01), Eisner

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