Sealing apparatus used in a wire cut electric discharge machine
First Claim
1. A wire cut electric discharge machine, comprising:
- a machining tank storing a machining fluid;
an upper arm disposed at an upper portion of the machining tank;
a lower arm inserted into the machining tank;
a wire electrode extending between the upper arm and the lower arm for performing electric discharge machining on a workpiece placed fixedly in the machining tank;
a support member mounted to the machining tank for supporting the lower arm such that the lower arm is slidable relative to the machining tank and sealed from the machining tank, the support member having a groove formed all around its inner circumference; and
at least one O-ring interposed between the lower arm and the support member so as to make contact with a pair of sidewalls of the groove so that the lower arm is kept sealed from the machining tank.
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Accused Products
Abstract
A wire cut electric discharge machine according to the invention includes a machining tank storing a machining fluid, an upper arm disposed at an upper portion of the machining tank, a lower arm inserted into the machining tank, a wire electrode extending between the upper arm and the lower arm for performing electric discharge machining on a workpiece placed fixedly in the machining tank, a support member mounted to the machining tank for supporting the lower arm such that the lower arm is slidable relative to the machining tank and sealed from the machining tank, and an O-ring interposed between the lower arm and the support member. The support member has a groove formed all around its inner circumference, and the O-ring makes contact with sidewalls of the groove. Accordingly, even when the outside diameter of the O-ring varies depending on an error in diameter of the lower arm, contact between the sidewalls and the O-ring remains unchanged and fluid-tightness can be reliably ensured.
10 Citations
20 Claims
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1. A wire cut electric discharge machine, comprising:
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a machining tank storing a machining fluid;
an upper arm disposed at an upper portion of the machining tank;
a lower arm inserted into the machining tank;
a wire electrode extending between the upper arm and the lower arm for performing electric discharge machining on a workpiece placed fixedly in the machining tank;
a support member mounted to the machining tank for supporting the lower arm such that the lower arm is slidable relative to the machining tank and sealed from the machining tank, the support member having a groove formed all around its inner circumference; and
at least one O-ring interposed between the lower arm and the support member so as to make contact with a pair of sidewalls of the groove so that the lower arm is kept sealed from the machining tank. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A sealing mechanism for an arm of a wire cut electric discharge machine, comprising:
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a flexible sealing plate having an opening through which the arm passes;
a U-shaped housing, in cross-section, mounted around the opening, an open end of the U-shaped housing facing into the opening; and
an O-ring mounted on the arm and received in the U-shaped housing, wherein a distance between sides of the U-shaped housing is less than a width of the O-ring such that the O-ring contacts the sides of the U-shaped housing. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification