Modeling and experimental investigation of gas film in micro-electrochemical discharge machining process

Jiang, Baoyang; Lan, Shuhuai; Wilt, Kevin; Ni, Jun

doi:10.1016/j.ijmachtools.2014.11.006

Cited by 74 publications

(26 citation statements)

References 29 publications

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“…From the surface tensions of these two solutions at 25 • C, it was clear that the ethanolic solution surface tension was much lower than that of the aqueous solution, which was the main reason why the initial current density was lower in the ethanolic solution (Table 7). Surface tensions are also known to considerably influence a bubble's departure size, which is the largest size bubble attached on the cathode surface before release, and surface tension also provides an estimate of the static bubble departure size, given by [37] …”

Section: Discussionmentioning

confidence: 99%

Influence of Solvent and Electrical Voltage on Cathode Plasma Electrolytic Deposition of Al2O3 Antioxidation Coatings on Ti-45Al-8.5Nb Alloys

Yang

Jiang

Ding

et al. 2018

Metals

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Al 2 O 3 coatings were prepared on Ti-45Al-8.5Nb alloys via cathodic plasma electrolysis deposition (CPED) in both 1.2 M Al(NO 3 ) 3 aqueous and ethanolic solutions. Different voltages were also applied during the deposition process to optimize coating properties. Coatings deposited in both solutions mainly consisted of γ-Al 2 O 3 , with some Al(OH) 3 found in coatings prepared in aqueous solution. Coatings prepared in ethanol solution exhibited better oxidation resistance at 900 • C as well as better substrate adhesion, which was mainly due to smaller crater sizes on coating surfaces. The deposition process was discussed in detail and the reason for the smaller craters examined. The results suggested that solution surface tension mainly influenced the average diameter of hydrogen bubbles that formed on cathode surfaces during the process. Smaller bubbles lead to both lower current densities on cathodes and smaller crater sizes on coatings.

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Section: Discussionmentioning

confidence: 99%

Influence of Solvent and Electrical Voltage on Cathode Plasma Electrolytic Deposition of Al2O3 Antioxidation Coatings on Ti-45Al-8.5Nb Alloys

Yang

Jiang

Ding

et al. 2018

Metals

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“…Jiang et al [39] determined spark energy to model spark generation and this finite element model were validated with experiments. They [40] also modelled gas film evolution and Figure. 2 (a) Micro grooves, (b) enlarged figure of micro-grooves, (c) micro-pillar, (d) micro-wall, (e and f) micro-pyramid machined on glass by ECDM (KOH 30 wt%, 23 V pulse voltage, 1 ms/1 ms pulse on/off-time ratio, Ø 30-33 µm tool, 3 µm/s federate and 300 rpm rotational speed) [33] validated with experiments to enhance the machining efficiency and quality. The properties of electrochemical discharge effect were investigated by them [41].…”

Section: Ecdm Hybridsmentioning

confidence: 99%

Electrochemical discharge machining: A review

Özmen¹,

Asiltürk²

2016

IJSEA

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In this study, progress and sort of electrochemical discharge machining (ECDM) that was developed to manufacture the micro features like micro grooves, micro pillar, micro holes and micro channels etc. were investigated. Many materials can be machined regardless of material conductivity, hardness and strength by ECDM using electro chemical machining (ECM) and electric discharge machining (EDM) combination. Researchers developed electrochemical discharge drilling (ECDD), turning (ECDT), grinding (ECDG), milling, dressing, trepanning, wire ECDM, die-sinking ECDM, rotary ECDM, powder mixed ECDM, magnetic field assisted ECDM, vibration assisted ECDM methods. Pyrex, glass, stainless steel, cermet, soda lime glass, quartz, silicon nitride, zirconium oxide, borosilicate glass, diamond crystals, e-glass/epoxy composite, kevlar/epoxy composite and silicon wafer were used as a work piece. Effects of machining voltage and drilling depth on mean diameter, influence of tool travel rate on groove width and depth and effects of voltage types on micro holes accuracy and machining type etc were investigated. This review is to discuss the results of studies and applicability of this methods. It sums up also with a vision for future research in electrochemical micromachining.

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“…In addition, the electrolyte circulation effect was found to be better than the one of the column electrodes, and was able to improve the machining efficiency and reduce the problem of side wall discharge. In 2015, Jiang et al [23] used the electrolyte concentration, the electrode diameter, and the electrode immersion depth into the electrolyte as the variables to perform simulation through the finite element analysis method, and discharge machining threshold currents of ECDM were obtained. The result proved that when the electrode immersion depth into the electrolyte was shallower, the machining threshold current was greater, and the machining energy was greater.…”

Section: Introductionmentioning

confidence: 99%

“…The findings from the literature [19,23,25] demonstrated that the tool electrode rotation provided a higher material machining efficiency of ECDM and aided in the improvement of the hole circularity [26]. However, the tool rotation resulted in a larger surface contact between the tool tip and the workpiece and the hole size increased from the required hole diameter [27].…”

Section: Introductionmentioning

confidence: 99%

Micro-Drilling of Sapphire Using Electro Chemical Discharge Machining

Chen

2020

Micromachines

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Electrochemical discharge machining (ECDM) refers to a non-traditional machining method for performing effective material removal on non-conductive hard and brittle materials. To increase the ECDM machining efficiency, traditionally, the method of increasing the machining voltage or increasing the electrolyte concentration is used. These methods can also cause overcut reaming of the drilled holes and a rough surface on the heat affected area. In this study, an innovative combinational machining assisted method was proposed and a self-developed coaxial-jet nozzle was used in order to combine two assisted machining methods, tool electrode rotation and coaxial-jet, simultaneously. Accordingly, the electrolyte of the machining area was maintained at the low liquid level and the electrolyte was renewed at the same time, thereby allowing the spark discharge to be concentrated at the contact surface between the front end of the tool electrode and the machined material. In addition, prior to the machining and micro-drilling, the output of the machining energy assisted mechanism was further controlled and reduced. For the study disclosed in this paper, experiments were conducted to use different voltage parameters to machine sapphire specimens of a 640 μm thickness in KOH electrolyte at a concentration of 5 M.

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Modeling and experimental investigation of gas film in micro-electrochemical discharge machining process

Cited by 74 publications

References 29 publications

Influence of Solvent and Electrical Voltage on Cathode Plasma Electrolytic Deposition of Al2O3 Antioxidation Coatings on Ti-45Al-8.5Nb Alloys

Influence of Solvent and Electrical Voltage on Cathode Plasma Electrolytic Deposition of Al2O3 Antioxidation Coatings on Ti-45Al-8.5Nb Alloys

Electrochemical discharge machining: A review

Micro-Drilling of Sapphire Using Electro Chemical Discharge Machining

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