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- W4229064089 abstract "During the electrochemical discharge machining (ECDM) process, major imperfections on work material occurs due to stray cutting caused by thermal energy. Some of these are re-solidification, melt flow over, thermal splashes, micro-cracks, work material breakage, hole over cut (HOC), and sudden taper. These thermal deteriorations are inherent in thermal-based processes like the ECDM process. Post-processing of these machined features at micron-level on glass material is a challenging task. To overcome this issue, in the present article, the depth up to which thermal damages occurred was predicted at given input energy conditions and the same thickness of glass wafer was bonded over the work material during machining. In order to find out the thickness, a pressurized tool feeding and dial gauge attachment was designed. Using this attachment, instantaneous depth was measured at every second of machining time and effective energy supplied to each plane of the work material was calculated analytically. The same was imported in to COMSOL Multiphysics software for simulating the heat flux gradient and temperature distribution on each plane of the work material. Using the simulation data, the depths from the hole entrance that are more prone to thermal deteriorations was identified. This depth was considered as critical depth for respective input energy conditions. Applied voltage, pulse on time, and glass wafer thickness were considered as input parametric conditions, and machined hole depth, HOC, and hole quality on work material were considered as output characteristics. Experiments were performed with various parametric conditions, and it was observed that the glass wafer carried away the major thermal deteriorations and leaving minimal damages on the work material. At the optimal parametric conditions, HOC was reduced by 71.5% and hole quality was improved significantly. Application of glass wafer compromises around 39% hole depth." @default.
- W4229064089 created "2022-05-08" @default.
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- W4229064089 date "2022-07-01" @default.
- W4229064089 modified "2023-09-30" @default.
- W4229064089 title "On the use of sacrificial layer in ECDM process for form accuracy" @default.
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- W4229064089 doi "https://doi.org/10.1016/j.jmapro.2022.04.043" @default.
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