Gradient material electrode and preparation method thereof

Abstract

The invention discloses a gradient material electrode and a manufacturing method thereof. At least one layer of low-loss-rate conductive materials, which are in gradient diffusion from outside to inside, is arranged on a preset surface of an electrosparking processing tool electrode. A layer of materials with a processing loss rate lower than that of an electrode base body is prepared on the preset surface (all surface or side wall area surface) of the electrode, material component change gradient is formed from outside to inside, and matrix material components are finally equivalent, so thatthe loss rate is gradually transited to be the same with the loss rate of the matrix material from low to high, and therefore, generation or expansion of a fillet on the sharp corner position of the electrode is restrained, and shape dimension precision of the processed workpiece is improved; material components of the gradient material of the electrode matrix surface are gradually transited and are firmly combined with the matrix material, so that the defect that a purely prepared layer of low-loss-rate materials is liable to collapse in an electro-spark processing process is avoided.

Description

technical field [0001] The invention relates to the field of electric discharge machining electrodes, in particular to a gradient material electrode and a preparation method thereof. Background technique [0002] In the process of EDM, due to the skin effect, the current density in the sharp corner area of ​​the electrode working surface is significantly higher than that in other areas, resulting in rapid loss of the sharp corner area, which gradually becomes an arc shape, and is also copied to the surface of the processed workpiece, seriously reducing The shape and size accuracy of the processed workpiece. Contents of the invention [0003] In view of the above problems, embodiments of the present invention are proposed to provide a gradient material electrode and a preparation method thereof that overcome the above problems or at least partially solve the above problems. [0004] The embodiment of the present invention discloses a preparation method of a gradient materi...

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Problems solved by technology

[0002] During the EDM process, due to the skin effect, the current density in the sharp corner area of ​​the electrode working surface is significantly higher than other areas, resulting in rapid loss of the sharp corner area, which gradually becomes an arc shape, and is also copied to the surface of the processed workpiece, seriously reducing The shape and dimension accuracy of the processed workpiece

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