Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Frictionally engaging sides of opening in work
Patent
1990-04-06
1991-07-09
Schwartz, Larry I.
Cutting by use of rotating axially moving tool
With work-engaging structure other than tool or tool-support
Frictionally engaging sides of opening in work
408 80, 408181, 408111, 408233, 51241VS, 82 14, B23B 4100
Patent
active
050300415
ABSTRACT:
A compact boring system 20 for machining the interior surface of cylindrical shapes, such as steam turbine valves and rotors in a field situation. The apparatus is designed to set up in the object itself. A boring bar 26 is rotatably disposed in a pair of roller bearing supports 23. A plurality of locating buttons 29 extend radially from the bearing supports 23 to contact the interior of the object and support the apparatus therein. The bearing supports 23 can be secured to the boring bar 26 at any axial location thereon. A machining head 35 is also securable to the boring bar 26 at any axial location, and includes a threaded drive shaft 38 for translating the machining head 35 axially along the bar 26. A cutting tool 56 is disposed in the machining head 35 so as to be radially adjustable with respect to the axis of the bar. A rotary drive-system 153 for rotating the bar 26, and thus the machining head 35, within the bearing supports 23 is provided, the rotary drive also being mountable anywhere along the length of the boring bar.
REFERENCES:
patent: 413697 (1889-10-01), Wheelock
patent: 865533 (1907-09-01), Rowe
patent: 4359917 (1982-11-01), Wilger et al.
patent: 4668133 (1987-05-01), Campbell et al.
patent: 4678379 (1987-07-01), Sunday
patent: 4824296 (1989-04-01), Strait
Panian Michael G.
Schultz Robert
Schwartz Larry I.
Westinghouse Electric Corp.
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