Combined bore seat face grinding, EDM and lapping method for fin

Details Combined bore seat face grinding, EDM and lapping method for fin Combined bore seat face grinding, EDM and lapping method for fin

1986-05-22

1988-01-26

Leung, Philip H.

Electric heating

Metal heating

Cutting or disintegrating

2395333, B23H 100, B23H 910

Patent

active

047218398

ABSTRACT:
A combined grinding and EDM apparatus has an indexable rotary turret with four work heads secured thereon to locate a pair of nozzle body blanks with their longitudinal axes in spaced parallelism; and either three or four compound cross and longitudinal slide assemblies carrying grinding tools, lapping tools or non-contact machining tools which work on the blanks to machine the face and 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: 3388232 (1968-06-01), Dreisin
patent: 3833312 (1974-09-01), Miles et al.
patent: 4035904 (1977-07-01), Ishizaka et al.
patent: 4163313 (1979-08-01), Matsuno et al.
patent: 4419612 (1983-12-01), Reda et al.
patent: 4612690 (1986-09-01), Baker
patent: 4626645 (1986-12-01), Inoue et al.
patent: 4639568 (1987-01-01), Check et al.
"A Real Rough Story", Wijers, 10/1985, vol. VII, No. 5, EDM Digest, pp. 16-22.

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