Multiple pipe element electrode assembly EDM method and apparatu

Details Multiple pipe element electrode assembly EDM method and apparatu Multiple pipe element electrode assembly EDM method and apparatu

1981-06-09

1984-04-03

Paschall, M. H.

Electric heating

Metal heating

Cutting or disintegrating

219 69P, 219 69M, B23P 108

Patent

active

044410042

ABSTRACT:
A multiplicity of conductive pipe elements are arranged in parallel with one another in mutually insulating relationship and are secured together in a cup to form a multiple electrode assembly. The assembly is advanced into a workpiece in the machining feed direction and additionally is displaced relative to the workpiece by a Z-axis motor in a plane orthogonal to the machining feed direction by X-axis and Y-axis motors a distance slightly in excess of the uniform spacing (Gx,Gy) between the pipe electrodes along each of two mutually orthogonal axes in the plane. The additional displacement may be effected alternatively by vibrating the pipe elements transversely to the axes thereof with an amplitude essentially equal to the said distance. For further machining of the same workpiece, a proportion of the pipe elements may be released from the securely held state and individually advanced and/or retracted with rates of movement determining the shapes of the final machined contour. The power supply comprises an AC-DC-HF-DC Pulse inverter having multiple output terminals respectively connected to the multiple pipe elements. Machining liquid is pumped to and from the machining gaps via the pipe elements.

REFERENCES:
patent: 3740519 (1973-06-01), O'Connor
patent: 4017705 (1977-04-01), Bazhenov et al.
patent: 4242557 (1980-12-01), Sato et al.

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