Turning – Process of turning
Patent
1988-02-29
1988-12-20
Schmidt, Frederick R.
Turning
Process of turning
82 4R, 403330, B23B 516
Patent
active
047918420
ABSTRACT:
A pipe machining apparatus having a tool carrier rotatable about a frame mounted externally of a pipe, with the frame being formed of two semiannular sections which are releasably held together by connection devices including coacting pin and latch structures which are effectively positioned by means operable from the side of the frame. The tool carrier mounts at least one tool head having a tool slide for a tool movable radially of the pipe. The tool slide is movable by rotation of a feed screw which is rotated in a tool slide advancing direction by a rack and pinion structure including a rack adjustably mounted on a feed plunger which coacts with a tool advance cam on the frame. The rack is also mounted for pivotal movement to permit manual rotation of the feed screw in a tool slide retracting direction, which pivoting results from cogging of the pinion gears relative to the rack gears. The rack is adjustably threaded on the feed plunger to vary the stroke of the rack and adjust the feed rate relative to rotation of the tool carrier without change of the tool-advance cam to one of different contour.
REFERENCES:
patent: 1279022 (1918-09-01), Scott
patent: 2567833 (1951-09-01), Warren et al.
patent: 3908491 (1975-09-01), Gilmore
patent: 4397202 (1983-08-01), Mayfield
patent: 4543861 (1985-10-01), Kwech et al.
patent: 4624052 (1986-11-01), Garcia et al.
E. H. Wachs Company
Schmidt Frederick R.
Showalter Robert
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