Electric heating – Metal heating – Cutting or disintegrating
Patent
1981-10-23
1984-03-13
Reynolds, B. A.
Electric heating
Metal heating
Cutting or disintegrating
219 69G, 219 69M, B23P 100, B23P 112
Patent
active
044369760
ABSTRACT:
An electroerosion method and apparatus for machining a workpiece, especially a 3D (three-dimensional) cavity therein, with a wire or rod electrode displaced multi-axially, wherein the tool electrode or a part thereof is vibrated transversely to the axis thereof at a resonant frequency thereof by an electro-mechanical vibrator. A transducer converts the mechanical vibrations into a corresponding electrical signal, and a detection circuit detects a change of the signal from the tranducer caused by a shift from the resonant condition which is produced by erosive wear of the vibrating part of the tool electrode. The detection circuit controls, through a driver circuit, an electrode driving motor in a manner such as to control the machining gap between the machining face of the electrode and the workpiece at a desired value. Where the wear of the electrode results in a reduction in the free, vibratable length of the electrode, the vibrator frequency is varied to compensate for the reduction in length of the free, vibratable length of the electrode.
REFERENCES:
patent: 3591761 (1971-07-01), Bederman et al.
patent: 4365133 (1982-12-01), Inoue
Dubno Herbert
Inoue-Japax Research Incorporated
Keve Alfred S.
Reynolds B. A.
Ross Karl F.
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