Electrode for the electrochemically fineboring workpieces and method for producing the same
AssigneeMTU Aero Engines AG
InventorsAlbin Platz, Konrad Rager
Life of this patent
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Abstract
The invention relates to an electrode for the electrochemical fine-boring of workpieces, comprising an (electrode) tube (6) for an electrolyte (4) to pass through to reach a workpiece (5) which is to be machined, and an electrical conductor which is connected to the electrolyte (4), in which electrode the tube (6), for the purpose of boring bores with the smallest possible diameter, consists of a metal with a substantially amorphous structure, is electrically conductive and is provided on its outer surface, at least in sections, with a nonconductive insulating layer (10) (FIG. 2).
Claims12
Electrode for the electrochemical fine-boring of workpieces, comprising an (electrode) tube (6) for an electrolyte (4) to pass through to reach a workpiece (5) which is to be machined, and an electric conductor which is connected to the electrolyte (4), characterized in that the tube (6) consists of a metal with a substantially amorphous structure, is electrically conductive and is provided on its outer surface, at least in sections, with a nonconductive insulating layer (10).
Electrode according to one or more of the preceding claims, characterized in that the tube (6) consists of a ZrTiNiCuBe alloy.
Electrode according to one or more of the preceding claims, characterized in that the insulating layer (10) substantially comprises AlON or TiAlON or an organic base, such as coatings, or an inorganic oxide ceramic.
Electrode according to one or more of the preceding claims, characterized in that the thickness of the insulating layer (10) is in the range from 4 μm to 10 μm.
Electrode according to one or more of the preceding claims, characterized in that the outer surface of the electrode (6) is substantially completely provided with the insulating layer (10).
Electrode according to one or more of the preceding claims, characterized in that an electrically conductive metal or graphite layer (11) is applied at least to sections of the insulating layer (10).
Process for producing an electrode for electrochemical fine-boring, the electrode comprising an electrode tube (6) for an electrolyte (4) to pass through to reach a workpiece (5) which is to be machined, and an electrical conductor which is connected to the electrolyte (4), characterized in that an electrically conductive metal with a substantially amorphous structure is provided as material for the electrode tube (6), the electrode tube (6) is drawn from a tube of larger external diameter to a smaller external diameter (D) by glass drawing, and a nonconductive insulating layer (10) is applied at least to sections of its outer surface.
Dependencies are inferred from the claim text.