Method and apparatus for wire-cutting electrical discharge machi

Details Method and apparatus for wire-cutting electrical discharge machi Method and apparatus for wire-cutting electrical discharge machi

1993-10-13

1995-05-23

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

219 6917, B23H 706

Patent

active

054183448

ABSTRACT:
A wire cut electrical discharge machining apparatus or machining a corner in a workpiece, which uses a gap error voltage to generate a command velocity component. A velocity control device is used for clamping a command velocity at not more than a set velocity value. Alternatively, the error voltage is used to generate the combination of an integration component and a transient response component which is used to generate a command velocity. Also, an inside corner with a small minimum corner radius can be machined at high accuracy by defining a plurality machining tracks, which include a circular portion at an inside corner, to have the same radius.

REFERENCES:
patent: 4081652 (1978-03-01), Janicke et al.
patent: 4837415 (1989-06-01), Magara et al.
patent: 5021622 (1991-06-01), Magara et al.
patent: 5041984 (1991-08-01), Watanabe
patent: 5113050 (1992-05-01), Seki et al.

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