A method for micro-electrolytic machining of metal surfaces imitating sharkskin structures with gel media
A micro-electrolysis and metal surface technology, which is applied in the direction of electrochemical processing equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of easy processing failure, difficulty in processing fine structure of metal surface, and incompatible shark protection
Inactive Publication Date: 2017-01-11
TONGJI UNIV
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Problems solved by technology
However, the imitation shark skin structure is manufactured by the method of copying, which requires shark skin as a sample, which does not meet the original intention of protecting sharks, and it is very difficult to process the microstructure of the metal surface, and it is easy to fail.
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Embodiment 1
[0027] Example 1: Before electrolytic processing, gel molds need to be prepared, mainly through 3D printing technology to process molds with shark skin fine surface structure, in preparation for the preparation of gels with a certain shape.
[0028] The gel making device among the present invention is as figure 1 As shown, the device is made up of a tool anode 5, a gel mold 13 and a baffle 14, the two ends of the gel mold 13 are provided with a baffle 14, the cavity of the gel mold 13 is equipped with a tool anode 5, and the The light irradiates the gel mold 13; the gel 4 is prepared in the gel mold 13; the electrolyte NaNO 3 Solution, dimethyl acetylacetamide DMAA, clay and photoinitiator DEAP were uniformly mixed with water according to the mass ratio of 70:70:29:1 to obtain a clear and transparent gel solution, which was poured into a In the mold cavity of the gel mold 13 of the tool anode 5; and placed under the irradiation of purple light, the gel 4 required for processi...
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The invention discloses a fine electrochemical method for machining a metal surface with an imitation shark skin structure by taking gel as a medium and relates to the fields of electrochemical machining, bionics and the like. The method specifically includes an electrochemical machining preparatory stage and an electrochemical machining stage, wherein for the electrochemical machining preparatory stage, preparing a gel mould with a shark skin surface microstructure and preparing electrolyte NaNO3 by the aid of the 3D (three dimensional) printing technology, and for the electrochemical machining stage, preparing the gel with the surface rough microstructure by the aid of the gel mould; subjecting the gel to electrolytic treatment by adopting automatic electrochemical machining or manual electrochemical machining; after machining, cleaning the machining surface so as to remove electric chips and impurities. The electrochemical machining is performed by taking a tool electrode wrapped by the gel containing electrolyte as an anode and a workpiece as a cathode. The electrolyte NaNO3 is absorbed by a space grid structure of the gel, so that an electrochemical reaction region is limited by the shape of the gel, the shaped of the gel is formed by the mould of the imitation shark skin structure, and the surface of the workpiece can be finely machined.
Description
technical field [0001] The invention mainly relates to the technical field of bionics and micro-electrochemical processing, and in particular relates to a method for micro-electrolytic machining of a metal surface with a gel medium to imitate a shark skin structure. Background technique [0002] The skin surface of fast-swimming sharks has groove-like structures arranged in an orderly manner along the flow direction, which are thought to reduce surface frictional resistance in turbulent flows. People simulate this biological structure for experimental research and application. By replicating and improving the groove-like structure on the surface of shark skin, the frictional resistance is reduced by nearly 10%. However, to manufacture the imitation shark skin structure through the method of copying requires shark skin as a sample, which does not meet the original intention of protecting sharks, and it is very difficult to process the microstructure of the metal surface, and ...
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IPC IPC(8): B23H3/00B23H9/00
CPCB23H3/00B23H9/008
Inventor 王昆牟玉壮沈奇
Owner TONGJI UNIV