Experimental investigation on performance of additive mixed dielectric during micro-electric discharge drilling on 316L stainless steel |
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| Authors: | J. Cyril Asokan Paravasu J. Jerald Kumar Sumit G. Kanagaraj |
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| Affiliation: | 1. Department of Production Engineering, National Institute of Technology, Tiruchirappalli, India;2. Department of Mechanical Engineering, Thiagarajar College of Engineering, Madurai, India |
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| Abstract: | This study investigates the impact of machining factors on the performance of additive mixed micro-electric discharge drilling of 316L stainless steel. The effects of three kinds of powder, powder concentration, voltage, capacitance, feed rate, and speed on tool wear rate, material removal rate, taper angle, and overcut (OC) were also investigated. The experimental results show that adding additives to the dielectric enhanced rate of material removal and reduced rate of tool wear significantly. Mixing powder with dielectric increased the length of the sparking, resulting in significant OC, and process performance also improved with the increase in amount of powder added. Further, scanning electron microscopy analysis was carried out to examine the surface characteristics and material migration properties, which confirmed that the properties of the machined surface are indeed significantly improved. |
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| Keywords: | Drilling EDM EDS micromachining MRR overcut polarity powder SEM speed taper TWR |
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