Forthcoming and Online First Articles

International Journal of Machining and Machinability of Materials

International Journal of Machining and Machinability of Materials (IJMMM)

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International Journal of Machining and Machinability of Materials (3 papers in press)

Regular Issues

  • Experimental investigation into electrochemical discharge peripheral surface grinding process of polymer nanocomposites   Order a copy of this article
    by Nandani Singh, Vinod Yadava, Pragya Shandilya 
    Abstract: Polymer nanocomposites, best possible emerging materials for multifunctional parts/products, are difficult-to-machine due to their enhanced mechanical properties. Electrochemical discharge machining (ECDM) has potential for machining such materials, and has been used in configurations like Drilling-ECDM, Milling-ECDM, TW-ECDM and Turning-ECDM. However, limited work has been found in Grinding-ECDM. Therefore, present work attempts to investigate Grinding-ECDM. The experiments have been carried out based on one-parameter-at-a-time on indigenously developed experimental setup which has same configuration as conventional peripheral surface grinding; therefore, the process is named as electrochemical discharge peripheral surface grinding (ECDPSG). The effects of supply voltage, pulse-on time, electrolyte concentration, and wheel rotation on MRR and Ra have been analyzed during machining of alumina-reinforced-epoxy-nanocomposite. The results show that for MRR, at wheel rotation 3 rpm and 4 rpm, pulse-on time whereas at wheel rotation 5 rpm, supply voltage is dominating parameter. For Ra, supply voltage is dominating parameter at all wheel rotations.
    Keywords: Alumina-reinforced-epoxy-nanocomposites; electrochemical discharge grinding; electrochemical discharge peripheral surface grinding; MRR; polymer nanocomposites.
    DOI: 10.1504/IJMMM.2022.10051497
     
  • Machinability study, machining performance optimization and sustainability assessment in laser micro-drilling of CNT/Epoxy nanocomposite   Order a copy of this article
    by Lipsamayee Mishra, Trupti Ranjan Mahapatra, Debadutta Mishra, Soumya Ranjan Parimanik 
    Abstract: Precision drilling of carbon nanotube (CNT)-based polymer matrix composite (PMC) is a demanding operation owing to their promising application. Laser beam machining is possibly a viable alternative to overcome the delamination, burr development, fiber pull-out, and poor surface quality problems associated with traditional drilling processes. The effectiveness of the Nd:YAG laser machining system on CNT/epoxy-based PMC is investigated in this article. The planned research aims to determine the best process parameter settings for obtaining the minimum taper and minimum heat affected zone for quality holes. The experimental investigation is performed utilizing a Box-Behnken design-based response surface methodology (BRSM) and the influence of numerous input parameters (pulse frequency, cutting speed, lamp current, and air pressure) have been discussed by various surface plots and contour plots. The whale optimization algorithm (WOA) is implemented to optimize the process parameters. Finally, confirmation tests are conducted to compare the experimental and optimal findings produced using the proposed methodology. The confirmation results prove that the WOA algorithm can be used for optimizing the machining parameters with utmost supremacy.
    Keywords: CNT polymer composite; laser micro-drilling; taper; HAZ; BRSM; WOA; Sustainability.
    DOI: 10.1504/IJMMM.2023.10052717
     
  • Effect of Tool size and Cavity Depth on Response Characteristics during Electric Discharge Machining - An Experimental Investigation   Order a copy of this article
    by Sudhanshu Kumar, Dilip Sen 
    Abstract: In the present investigation, AISI304 material has been selected as the workpiece, and electrolytic copper as the tool electrode. For systematic investigation and understanding of the effect of tool size in terms of tool diameter and cavity depth along with other important electrical parameters namely, peak current, pulse-on-time, and gap voltage have been varied at three different values. The experiment has been designed using the fractional factorial (Taguchi) method. The effect of parameter settings is observed for material removal rate (MRR), tool wear rate (TWR), and surface roughness (Ra). Results reveal that a larger tool diameter yielded 13% more MRR and there is no significant effect of cavity depth on MRR, TWR, and surface quality. To perform experiments with other parameters set, smaller cavity depth can be used which can reduce the cost and time of experiments. Further, statistical analysis has been carried out to identify the interaction effect between the parameters.
    Keywords: electrical discharge machining; EDM; AISI304; material removal rate; MRR; surface roughness; tool wear; tool size.
    DOI: 10.1504/IJMMM.2023.10052822
     

 

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