Turning – Axial pattern
Patent
1984-06-07
1986-06-10
Husar, Francis S.
Turning
Axial pattern
82 21A, 91 37, 251 3, 409129, B23B 328
Patent
active
045935866
ABSTRACT:
The piston rod of a longitudinal feed cylinder of a tracer controlled lathe is connected with the lathe carriage by means of an operative connection consisting of another hydraulic cylinder or a cam arrangement which permits the rod of the feed cylinder to continue movement in the feed direction while maintaining the carriage in a fixed position. This permits the cutting tool mounted on the cross slide to machine a sharp shoulder on the workpiece perpendicular to the axis of rotation of the lathe spindle. The circuit includes a tracer valve that is variably restricted in accordance with movement of a stylus following a contoured template. The tracer valve is conneted to a feed line from a high pressure pump which extends directly or indirectly to one side of a hydraulic cylinder for displacing the cross slide in the carriage. The opposite side of the cross slide cylinder is connected to a low pressure pump. The pressure differential across the cross slide cylinder controls the operative connection between the longitudinal feed cylinder and the carriage to vary the effective rate of movement of the carriage in the longitudinal feed direction.
REFERENCES:
patent: 2940263 (1960-06-01), Cudnohufsky
patent: 3104591 (1963-09-01), Cudnohufsky
patent: 3820439 (1974-06-01), Cudnohufsky
Husar Francis S.
Kearns Jerry
Programmable Tracing Incorporated
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