1981-05-18
1983-09-27
Vlachos, Leonidas
Turning
Axial pattern
82 3, 60538, B23B 328
Patent
active
044061919
ABSTRACT:
The work is a plurality of blanks whose inner or outer surfaces are to be shaped to form molds. The blanks are mounted rotatably in synchronism with a master having the contour for shaping the blanks. A tracer in engagement with the contour and tools in cutting engagement with the blanks are mounted on a slide movable laterally with respect to the axes of the blanks and master as commanded by the contour. The slide is moved axially with respect to the blanks and master so that the tracer follows the contour moving transversely inwardly and outwardly. The tracer is coupled to a linear variable differential transformer (LVDT) which produces an electrical signal corresponding to the transverse movement of the tracer. The signal drives a low-inertia motor which rotates a screw in one direction or the other depending on the instantaneous polarity of the signal. The screw is in engagement with a nut. The nut is prevented from rotating and advances or retracts depending on the direction of rotation of the motor. The nut drives a controlling piston in a controlling cylinder in a closed-loop fluid system back and forth. The closed-loop system also includes a driving cylinder including a driving piston. The driving piston moves the slide transversely backwards and forwards moving the tracer and tools so that the tools follow the tracer and shape the blanks.
REFERENCES:
patent: 2858745 (1958-11-01), Dever
patent: 3014390 (1961-12-01), Garde et al.
patent: 3026680 (1962-03-01), Evans
patent: 3034300 (1962-05-01), Hachenberg
patent: 3264910 (1966-08-01), Kindelan
patent: 3555441 (1971-01-01), Cudnohufsky
patent: 3950948 (1976-04-01), Luke
patent: 3969965 (1976-07-01), Hawkins
patent: 4016784 (1977-04-01), Brown
Diamond Hymen
Vlachos Leonidas
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