Experimental Investigation Into Sequential Micro Machining (SMM) for Micro Hole Drilling on SS–304

Raju Mahadeorao Tayade, Biswanath Doloi, Biplab Ranjan Sarkar and Bijoy Bhattacharyya
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Raju Mahadeorao Tayade: Jadavpur University, Kolkata, India
Biswanath Doloi: Jadavpur University, Kolkata, India
Biplab Ranjan Sarkar: Jadavpur University, Kolkata, India
Bijoy Bhattacharyya: Jadavpur University, Kolkata, India

International Journal of Manufacturing, Materials, and Mechanical Engineering (IJMMME), 2019, vol. 9, issue 4, 1-16

Abstract: Sequential micro machining (SMM) is a strategy of machining applied for micro-part manufacturing. Due to the finding of new sequential machining combinations, the authors have presented a novel combination of micro-ECDM (µECDM) drilling and micro-ECM (µECM) finishing for producing micro-holes in SS-304 stainless steel. An experimental setup was developed indigenously to conduct both machining processes at one station. The sequential processes were employed with desirable machining parameters, during their individual execution. The most desirable parameter like machining voltage, for hole drilling by µECDM was decided by studying hole taper angle, radial overcut, etc. The µECDM generates a recast layer, to overcome the adverse effects of µECDM, with the µECM finishing applied subsequently. The experimental results of SMM indicate a reduction in hole taper angle, improved circularity, and better surface quality. The change of phase of material due to sequencing of µECDM and µECM processes was analyzed by an XRD analysis of SS-304.

Date: 2019
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