Gear cutting – milling – or planing – Milling – Including means to infeed rotary cutter toward work
Patent
1979-07-27
1982-12-07
Hinson, Harrison L.
Gear cutting, milling, or planing
Milling
Including means to infeed rotary cutter toward work
51241S, 82 4C, 409211, B23C 120, B23B 322, B23F 2103
Patent
active
043624472
ABSTRACT:
An adjustable face milling cutter is carried on a turntable rotatable about a central axis that is coaxial with the cylindrical shell of the steam generator in which the tubesheet is located, to machine a circular path on the upper tubesheet surface. For complete circle-by-circle scanning of the tubesheet surface, the radius of the circular machined path is variable by virtue of mounting the milling cutter on the outer periphery of a circular mounting member turnable to different locked rotary positions about an off-center pivot axis on the turntable. The rotary support for the turntable is at its outer periphery, as provided by an encircling support ring which in turn is supported by a ball bearing assembly having an inner race secured to the turntable top and an outer race secured to the support ring top; teeth on the inner race being provided to accommodate a motor-operated drive gear. The support ring is centered in the steam generator shell by jack screws and is supported by such shell via a circular array of support lugs welded to the inner wall of such shell.
REFERENCES:
patent: 2718820 (1955-09-01), Faselt
patent: 3158065 (1964-11-01), Korenek et al.
patent: 3273432 (1966-09-01), Hasund
patent: 3630109 (1971-12-01), MacMichael
patent: 3687007 (1972-08-01), Harris
patent: 3848371 (1974-11-01), Dillinger
Cooper Jr. Frank W.
Pekar Frank M.
Abeles Daniel C.
Hinson Harrison L.
Westinghouse Electric Corp.
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