Metal working – Method of mechanical manufacture – Rocket or jet device making
Patent
1989-08-25
1990-07-24
Gorski, Joseph M.
Metal working
Method of mechanical manufacture
Rocket or jet device making
29DIG29, 29423, 164 98, 164112, 249174, 249176, 249177, 264221, 264277, 264317, B21D 5300, B22D 1914, B28B 2142
Patent
active
049426532
ABSTRACT:
An improved method of manufacture is provided for producing a channeled wall thrust nozzle (10) of the type used to define a thrust chamber (12) in a jet or rocket engine. The method utilizes a precision formed mandrel (20) having an external geometry conforming generally to the converging-diverging shape of the desired thrust chamber (12), and further including longitudinally extending slots (24) for receiving channel separation ribs (26) which may be formed by die cutting from sheet stock. The channel spaces (16) between the separator ribs (26) are filled with a removable casting material (30) such as wax, and an outer housing shell (32) for the thrust nozzle is mounted about and secured to the separator ribs. The mandrel (20), which is transversely split at the throat of the thrust chamber (12), is then removed to expose the radially inboard margins of the separator ribs (26) for precision machining, followed by mounting of an inner housing shell (34) to the separator ribs. The casting material (30) is then removed from the resultant thrust nozzle (10) to leave precision process fluid channels (16) formed between the inner and outer housing shells.
REFERENCES:
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patent: 3529054 (1970-09-01), Hepner
patent: 3613207 (1971-10-01), Malburg
patent: 3692637 (1972-09-01), Dederra et al.
patent: 4584171 (1986-04-01), Niino et al.
patent: 4707225 (1987-11-01), Schuler et al.
"Liquid Rockets and Propellants", Bollinger et al., Academic Press, New York, 1960, pp. 563-583.
Field Harry B.
Gorski Joseph M.
Hamann H. Fredrick
Kahm Steven E.
Rockwell International Corporation
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