Turning – Process of turning
Patent
1979-01-02
1981-02-17
Hinson, Harrison L.
Turning
Process of turning
82 12, 408147, B23B 300, B23B 4100, B23B 5100
Patent
active
042507774
ABSTRACT:
A boring head for use in machining the inner surface of a vertical work piece wall having inner and outer surfaces and a central opening therethrough to produce a flat, plane, discoid surface where a boring machine and a boring bar to which the boring head is to be attached are situated adjacent the outer surface of the vertical work piece wall. The boring bar and work piece are positioned to have the boring bar axis of rotation coincident with the axis of the desired final machined discoid surface. A taper shank extending outwardly from a main body of the boring bar projects through the work piece wall opening to fasten to the boring bar to position the boring head in adjacent relation to the inner surface of the work piece wall. A tool slide extends longitudinally outwardly from the main body radially of the axis of rotation of the boring bar. A tool holder is slidably mounted in the tool slide, and a tool bit in the tool holder extends outwardly through a slot in the tool slide in direction toward the inner surface of the work piece wall. The tool bit is guided for precise longitudinally movement with respect to the tool slide by tool slide flats which define the slot. A threaded feed screw is rotatably mounted in the body of the boring head and means is provided to move the tool holder longitudinally of the tool slide responsive to rotation of a feed screw nut threadably associated with the feed screw. Relative motion of this nut with respect to the feed screw is obtained by use of a driver rotatably mounted with respect to the boring bar rotation axis and by gearing means connected between this driver and the feed screw nut. A static drive bar is connected to this concentric gear driver to prevent rotation of the driver relative to the work piece thus forcing rotation of the driver relative to the rotating boring head.
REFERENCES:
patent: 2196231 (1940-04-01), Ridgway
patent: 2831386 (1958-04-01), Woytych
patent: 2901935 (1959-09-01), Keller, Jr. et al.
patent: 3286556 (1966-11-01), Reynolds
patent: 3371559 (1968-03-01), Scholl
patent: 3422705 (1969-01-01), Nahodil et al.
patent: 3599517 (1971-08-01), Muller
patent: 3937586 (1976-02-01), Watson
patent: 4067251 (1978-01-01), Eckle et al.
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