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 112
Patent
active
RE0314927
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 [position] 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.
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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: 4104500 (1978-08-01), Wyss
Ateliers des Charmilles S.A.
Shaw C. C.
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