| 摘要 |
An electrical discharge machining apparatus 10 comprises an electrode assembly 40 having an electrode clamp 54 for clamping a hollow electrode 24. Dielectric fluid is directed through the hollow interior of the electrode 24 to a workpiece 14. A deformable seal 70 seals between the electrode 24 and the assembly 40, and is moveable between a relaxed position (see <cross-reference target="DRAWINGS">FIG. 3</cross-reference>) in which dielectric fluid can flow between the seal 70 and the assembly 40, and an operative position (see <cross-reference target="DRAWINGS">FIG. 5</cross-reference>) in which the seal is deformed, and seals between the electrode and the assembly 40. A piston 74 actuates the clamp 54 and also caused deformation of the seal 70. The clamp 54 and seal 70 are capable of receiving an electrode 24 having an external diameter within a 200 micron range.
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