Research On The Tapered Multi-line Spiral Electrode Electrochemical Micromachining Of Generating Motion

There has microstructure of a rough surface of the ribs, continuous or non-continuous structure in the inner tube which can improve the heat transfer efficiency and reduce energy consumption, it can effectively improves the thermal performance of electronic devices and extends the life expectancy, the tubes with microstructures that improve the overall of heat transfer performance have a major impact, comparing with the continuous micro-structure, non-continuous microstructure is more advantageous to play the condensate surface tension and liquid boiling, promotes convective heat transfer and boils bubble grow exponentially and evaporation. Inner surface of Non-continuous microstructure refer to have micron grooves in the inner surface of the tube and have tons of forming regular patterns in it. But from now on, the key technology is how to process the non-continuous microstructure in the inner surface of small diameter tubes, electrochemical machining technology regards as an efficiently and cost-effectively processing method to anodic dissolution with hydronium removing, therefore, the micro-nano processing industry has great prospects.In the paper, what we combined with processing requirements of non-continuous microstructure in the inner surface, formulated the processing technology of ultraviolet curing and electrochemical micromachining, is surrounded by electrolytic micro grooves depth and width of two indicators that are developed into a fine electrolytic process of exploration.Integrating with processing characteristics of non-continuous microstructure in the inner surface, designed the test platform which generates processing the inner surface of tubes and bases on LabVIEW graphical software of control system. The test platform is including three parts of body structure designing, control system designing, electrolyte circulation system and adopts to high-frequency pulse current to achieve microstructure processing of ECM generating motion in the inner surface. Comparing with the designing methods of the tapered multi-line spiral electrode, simulates electric field distribution which is relationship with tapered spiral electrode, working voltage, concentration of NaNO3, designs electrode layer of mask, improves Craftsmanship and eventually uses the ultraviolet curing technology to mask the tapered multi-line spiral electrode.Using ECM power supply to provide stable pulse current, we have a precisely control processing through human machine interface, the research turns out that electrolytic depth and width were significantly influenced by working voltage, concentration of NaN03, duty cycle, pulse frequency. With working voltage and concentration of NaNO3 are increasing, electrolytic depth increases firstly and then decreases, electrolytic width is decreasing. With duty cycle and pulse frequency are increasing, electrolytic depth increases all the time, but the former of electrolytic width increases firstly and then tends to be gentle, the latter of the electrolytic width always decreases.Though forced convection heat transfer in horizontal tube under constant wall temperature condition of three kinds of tubes with smooth inner surface, continuous microstructure, and non-continuous microstructure, it turns out to have best heat transfer effect of the test tube with non-continuous microstructure in the inner surface.