Turning – Process of turning
Patent
1985-04-05
1987-07-07
Godici, Nicholas P.
Turning
Process of turning
B23B 516
Patent
active
046778845
ABSTRACT:
A portable end prep lathe having presettable mechanical structure operable in response to rotation of a tool head for controlling the angle of a bevel cut on a pipe.
A frame is supported relative to a pipe by a mast having a threaded section. The frame carries a rotatable tool head having a tool slide movable to advance a tool radially of the mast. The rate of radial advance of the tool slide is controlled by cam and cam follower structure mounted on the frame and tool head, respectively, and with the number of cams controlling the rate of advance per revolution of the tool head. The tool head is advanced axially of the mast and a pipe by means responsive to rotation of the tool head, including a star wheel mounted on the frame and drivingly connected to a nut threaded on the threaded section of the mast. The tool head has a plurality of circumferentially-spaced actuator pins for coaction with the star wheel to cause indexing thereof as the tool head rotates and resulting axial movement of the tool head whereby, with the radial advance of the tool slide, a bevel is cut on the pipe. The angle of the bevel can be determined by the number of actuator pins that are operable in each rotation of the tool head to index the star wheel and, if a lesser number than all of the actuator pins is initially used, additional actuator pins can be rendered operative during the machining cycle, without stopping the machine, to increase the axial feed and, therefore, the angle of the bevel that is cut on the pipe.
REFERENCES:
patent: 2537916 (1951-01-01), Rosenboom
patent: 3141365 (1964-07-01), Peters
patent: 3540328 (1970-11-01), Foss
patent: 3908491 (1975-09-01), Gilmore
patent: 4175471 (1979-11-01), Wilger et al.
patent: 4322991 (1982-04-01), Feamster, III
patent: 4397202 (1983-08-01), Mayfield et al.
patent: 4411178 (1983-10-01), Wachs et al.
Drawings as appearing in Wachs et al, U.S. Ser. No. 654,810, filed Sep. 26, 1984, (Prosecution in Art Unit 321).
Drawings as appearing in Kwech et al, U.S. Ser. No. 610,656, filed May 11, 1984, (Batch No. H59).
Kwech Horst
Olson Peter K.
Godici Nicholas P.
Kearns Jerry
The E. H. Wachs Company
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