| 摘要 |
<p>A wire electric discharge machine for subjecting a work to electric discharge machining by using a wire electrode extended in a tensed state between first and second wire guides with a processing liquid packed in a space between the wire electrode and the work, the machine being provided with a work tank (WT) holding a work (WP) therein, a guide mechanism (N) provided in the work tank and adapted to guide a movement of a first wire guide (14) in X-Y planes formed by an X-axis and a Y-axis which cross each other at right angles, and a seal member (16) enclosing the guide mechanism (N) so as to prevent the entry thereinto of the processing liquid supplied to the work tank (WT), pressurized fluid supply units (401, 402, 403, A1, A2) for supplying a pressurized fluid to the interior of the seal member (16) being connected to the same member (16), the pressurized fluid supply unit being adapted to respond to a signal from a sensor (404) provided in the seal member (16) for detecting a liquid pressure, an inner pressure of the seal member (16) being controlled to be equal to a pressure of the processing liquid.</p> |
