Electric heating – Metal heating – Cutting or disintegrating
Patent
1981-05-04
1984-01-10
Shaw, C. C.
Electric heating
Metal heating
Cutting or disintegrating
B23P 108
Patent
active
RE0314900
ABSTRACT:
In the electrical discharge machining of the surface of a recess in a workpiece electrode to a shape corresponding to that of a tool electrode, the electrodes are relatively displaced, during a finishing phase of machining, along an axis of penetration and simultaneously in a plane perpendicular to the axis of penetration with a cyclic translational movement whose amplitude increases with the penetration of the tool in the workpiece. This provides a virtual three-dimensional dilatation of the tool as it advances, and enables control of the sparking in both the frontal and lateral parts of the machining zone. The cyclic translational movements are obtained from a rotatable shaft having an axis parallel to the axis of penetration and an eccentric member cooperating with the rotatable shaft to slide relative to the shaft in a direction forming a predetermined angle with the direction of penetration, the eccentric member being rotated in unison with the shaft about its axis.
REFERENCES:
patent: 2773968 (1956-12-01), Martellotti et al.
patent: 3135852 (1964-06-01), Bentley et al.
patent: 3322929 (1967-05-01), Mayer et al.
patent: 3433919 (1969-03-01), Braudeau et al.
patent: 3539754 (1970-11-01), Furze et al.
patent: 3564190 (1971-02-01), Kandajan et al.
patent: 3809852 (1974-05-01), Weber
Zvonkin et al, Elektronnaya Obrabotka, No. 4, 1973, pp. 10-14.
Ateliers des Charmilles S.A.
Shaw C. C.
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