1. Experimental investigations on cavity edm and wire edm during machining of h-11 steel
Authors : Anand Joshi, Kamaljeet Bhambri, Gurpreet Singh
Pages : 4-10
DOI : http://dx.doi.org/10.21172/1.121.02
Keywords : Cavity EDM, Wire EDM, Material removal rate, Surface roughness, Tool wear ratio, Wire wear ratio, On-Time, Off-Time, Regression analysis Abstract :Electric discharge machining has been utilized for machining hard to machine substances that are not being synthesis by customary mass-produced techniques. This thermal metal removal process machine the work piece by high temperature spark erosion of material. Two different techniques falling under this category like cavity EDM and WEDM remove the material from electric conducting materials. In present investigations the cavity EDM and WEDM have been used to machine the holes of 10mm diameter on H-11 steel at different operative variable like current, voltage, On-time, Off-time. In Taguchi L-9 experimental design has been used for experimentation and the output response in terms of MRR, Tool wear ratio; Wire wear ratio and surface roughness have been recorded at different process parameters levels as per experimental design. Parametric optimization of Input variables has been made by using Regression analysis and to depict the relation between the significant parameters. The regression analysis shows that current influences the tool wear and MRR in cavity EDM as compared to voltage, on-time has significantly affected the tool wear, surface roughness and MRR and off-time has significantly affected the tool wear only. On the other hand current has significantly affected the performance of WEDM in terms of wire wear ratio, MRR and surface roughness. The regression analysis confirms that the on-time has significant contribution on wire wear ratio as well as the off-time has significantly affected the surface roughness of the work material. The significance of voltage on the performance of cavity EDM and wire EDM has been reported less as compared to other parameters. The experimental result shows that the cavity EDM is consuming almost 5-7 times more current than WEDM but the MRR is 3-4 times less than WEDM. The machining time of cavity EDM is 3-4 more time than WEDM and there has been improved surface roughness of wire EDM machining as compared to cavity EDM.
Citing this Journal Article :Anand Joshi, Kamaljeet Bhambri, Gurpreet Singh, "Experimental investigations on cavity edm and wire edm during machining of h-11 steel", Volume 12 Issue 1 - November 2018, 4-10
Click here to Submit Copyright Takedown Notice for this article.