Method and apparatus for forming intermittent chips when machini

Details Method and apparatus for forming intermittent chips when machini Method and apparatus for forming intermittent chips when machini

1990-10-11

1992-05-19

Schwartz, Larry I.

Turning

Process of turning

82137, 82134, 82904, 408 17, 408 1R, B23B 328, B23B 100

Patent

active

051137283

ABSTRACT:
The formation of intermittent chips or chip breakage are assured while machining a rotating workpiece by causing the undeformed chip thickness to vary periodically and be reduced to zero in each period of its variation. To obtain the periodic reduction of the undeformed chip thickness to zero, a cutting tool is made to oscillate along its feed advance path. Tool oscillation is controlled so that the tool's position depends on the angular displacement of the rotating workpiece. The number of cycles of tool oscillation per revolution of the workpiece may be freely chosen depending on the required length of chip segments. The oscillation amplitude needed to form intermittent chips depends on this number, feed advance per revolution, and number of simultaneously applied cutting edges of the tool. The oscillatory movement of the tool may be enforced in many ways. This method may be used in all machining operations where the workpiece rotates and the tool performs a feed motion, such as boring, drilling, reaming, and turning.

REFERENCES:
patent: 3174404 (1965-03-01), Findley
patent: 3477320 (1969-11-01), Findley
patent: 4165661 (1979-08-01), Wasco, Jr. et al.
patent: 4350054 (1982-09-01), Werth, Jr.
patent: 4667546 (1987-05-01), Dombrowski
patent: 4693146 (1987-09-01), Dombrowski
patent: 4939962 (1990-07-01), Wittkopp et al.
patent: 5019115 (1991-05-01), Schneider et al.
L. Medeksza et al., "Vibratory Turning", Conference on Increasing Productivity of Machining Processes, pp. 34-53, Wroclaw, Poland, Sep., 1976.

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