Electrical discharge machining method with simultaneous relative

Details Electrical discharge machining method with simultaneous relative Electrical discharge machining method with simultaneous relative

1980-10-21

1984-01-10

Shaw, C. C.

Electric heating

Metal heating

Cutting or disintegrating

219 69V, B23K 916

Patent

active

044254920

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 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), 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
patent: 3564190 (1971-02-01), Kandajan et al.
patent: 3809852 (1974-05-01), Weber
patent: 4104501 (1978-08-01), Wyss
Y. Z. Zvonkin et al., "Use of Circular Translatory Movement of the Tool Electrode for Electroerosion of Press Mould", Elektronnaya Obrabotka, No. 4, 1973, pp. 10-14.

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