Wire-cut electric discharge machine

Details Wire-cut electric discharge machine Wire-cut electric discharge machine

1983-06-17

1985-04-09

Paschall, M. H.

Electric heating

Metal heating

Cutting or disintegrating

219 69C, B23P 108

Patent

active

045103674

ABSTRACT:
In a wire-cut electric discharge machine the accurate thickness of a workpiece is obtained, on the basis of which electric cutting conditions are automatically changed over. The workpiece and a wire electrode are moved relative to each other through utilization of a servo feed system to cut the workpiece by discharge into a desired shape. Cutting current detecting means detects a true cutting current which contributes to electric discharge machining, and feed rate detecting circuitry detects the relative feed rate of the workpiece and the wire electrode. Thickness detecting circuitry detects the thickness of the workpiece by calculation on the basis of the detected true cutting current and the width of a cutting groove separately input. Control circuitry automatically changes over the electric cutting conditions on the basis of the detection result by the thickness detecting circuitry.

REFERENCES:
patent: 3731045 (1973-05-01), Ullmann et al.
patent: 4363948 (1982-12-01), Itoh
patent: 4366359 (1982-12-01), Yatomi et al.

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