Process for the manufacture of a ceramic axial turbine wheel

Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool

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Details

291568B, 51 59SS, 219 69V, 416241B, B24B 100

Patent

active

041641027

ABSTRACT:
A method and apparatus for manufacturing a twisted ceramic turbine wheel from an electrically conductive or electrically non-conductive ceramic mass with the aid of spark erosion or of ultrasonic machining and with the aid of profiling tools used therewith which are correspondingly matched to the desired profile shape, by means of which the pressure side and the suction side are to be worked; the two profile surfaces, i.e., the pressure side and the suction side of the profile are either worked successively by means of different tools or the pressure side and the oppositely disposed suction side are machined simultaneously by means of a single tool; in the former case, the tool is at first moved past one of the profile surfaces composed of inclined straight lines and is pivoted thereby corresponding to the inclination of the generating straight lines and thereafter is moved past the other of the two profile surfaces and is again pivoted thereby corresponding to the produced generating straight lines; in the latter case, the tool is matched to the desired profile shape on the two sides to be machined and is introduced radially to the turbine wheel into the hollow space to be machined between two respective profile blade surfaces to be machined, whereby the work tool carries out the necessary oscillations for the spark erosion or the ultrasonic working.

REFERENCES:
patent: 353551 (1943-05-01), Schutte
patent: 1568746 (1926-01-01), Lawaczeck
patent: 2429324 (1947-10-01), Meisser
patent: 2461948 (1949-02-01), Whitehead
patent: 2633776 (1953-04-01), Schenk
patent: 2729422 (1956-01-01), Scharf
patent: 2767460 (1956-10-01), Schultz
patent: 3091060 (1963-05-01), Giegerich
patent: 3863399 (1975-02-01), Cowdrick
patent: 3897171 (1975-07-01), Stahl

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