| 摘要 |
A sealing structure for use in a wire cut electric discharge machining apparatus for machining a workpiece in a machining solution, the machining apparatus having a machining reservoir for storing the machining solution which has a through window in a horizontal direction at side wall thereof to allow an arm for guiding a wire electrode to move in horizontal direction, the sealing structure prevents the machining solution from leaking. The sealing structure allows the arm to move smoothly in X and Y direction relative to the machining reservoir. The sealing structure comprises a covering plate for covering the through window of the reservoir, sealing member disposed between the covering plate and the reservoir, holding portion for holding the covering plate movably relative to the reservoir. The holding member includes plural bearings and an extendable bellows for surrounding the arm to prevent the machining solution from leaking.
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