Method of combining grinding and EDM operation for finishing fue

Details Method of combining grinding and EDM operation for finishing fue Method of combining grinding and EDM operation for finishing fue

1986-05-01

1987-10-27

Pellinen, A. D.

Electric heating

Metal heating

Cutting or disintegrating

219 69E, 219 69R, 2395333, B23H 100, B23H 910

Patent

active

047031425

ABSTRACT:
A combined grinding and EDM apparatus has an indexable rotary turret with work heads secured thereon to locate a pair of nozzle body blanks with their longitudinal axes in spaced parallelism; and compound cross and longitudinal slide assemblies carrying either grinding tools or non-contact machining tools which work on the blanks to form a valve guide bore and a valve seat shaped as a frustrum of a cone whose axis is concentric with the bore; the valve seat cone surface having a small end diameter to large end diameter ratio in the order of 1-50.

REFERENCES:
patent: 2619856 (1952-12-01), Hutchinson
patent: 3388232 (1968-06-01), Dreisin
patent: 3768344 (1973-10-01), Feldcamp
patent: 4106702 (1978-08-01), Gardner et al.
patent: 4163313 (1979-08-01), Matsuno et al.
patent: 4275844 (1981-06-01), Grgurich et al.
patent: 4419612 (1983-12-01), Reda et al.
patent: 4639568 (1987-01-01), Check et al.
"A Real Rough Story" by Wijers, EDM Digest, Sep./Oct. 1985, vol. VII, No. 5.

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