Faculty Publications

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Author: search.filters.author.Rao, M.Subject: search.filters.subject.Micromachining

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    Investigation on the performance of valveless pump for microdelivery of the fluid, fabricated using tool-based micromachining setup
    (World Scientific Publishing Co. Pte Ltd wspc@wspc.com.sg, 2017) Veeresha, R.K.; Rao, M.; Rao, R.; Tauro, A.M.
    Micropump is an integrated part of microfluidic system and is a boon to the field of miniaturization, owing to its helping hand in numerous applications mainly in biomedical, electronic cooling, fuel cells, spacecraft, etc. In this paper, an attempt is made to design and fabricate valveless pump, with active and passive valves. The actuation element used is piezowafer, piezowafer was experimentally tested and compared with simulated values from ANSYS for its peak displacement and these displacements were used to find volume pumped by pump. The pumping volumes found by experimentation are in good agreement with the simulated results. Further fabrication of valveless pump is carried out by using tool-based micromachining center which is a novel type of fabrication technique in micromachining. Through experiments, the optimum frequency of the pump was found to be 60Hz at an actuating voltage of 150V. The maximum head that a pump could pump was found to be 0.051m with pressure of 500.13Pa. The flow rate of the pump had a decreasing trend with increase in head. © 2017 World Scientific Publishing Company.
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    Damage Analysis of Tool-Based Micromachining Setup Using Electrical Continuity-Based Contact Detection System
    (Springer, 2021) Veeresha, R.K.; Rao, M.; Rao, R.; Sushith, S.; Karegoudra, M.K.
    Initial registration of tool with respect to workpiece is a critical requirement in tool-based micromachining setup. As the tool is in the order of few hundred micrometre diameter and rotating at very high speed, hence, the chance of tool breakage or workpiece surface damage during tool workpiece registration is more during micromachining. Initial tool registration of tool with respect to workpiece circuit was developed and incorporated with developed tool-based micromachining setup. The performance of the developed electrical continuity-based contact detection circuit was done by feeding the workpiece with different offset dimensions. From the experiments, it’s observed that there is more damage in workpiece when tool workpiece offset distance is more in both milling and drilling tools. © 2021, ASM International.