Method of electrical discharge machining with simultaneous relat

Details Method of electrical discharge machining with simultaneous relat Method of electrical discharge machining with simultaneous relat

1981-05-04

1984-01-10

Shaw, C. C.

Electric heating

Metal heating

Cutting or disintegrating

219 69V, B23K 916

Patent

active

RE0314919

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, a method whereby 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 3-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 such that the shape of the machined portion is an image of the tool shape. The cyclic translational movements can be obtained with an eccentric member whose eccentricity relative to a shaft is controlled by limiting axial movement of the shaft at a position corresponding to a predetermined penetration.

REFERENCES:
patent: 2773968 (1956-12-01), Mantellotti 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
patent: 3919516 (1975-11-01), Ullmann et al.
Zyonkin et al., Elektronnaya Obrabotka, No. 4, 1973, pp. 10-14.

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