Diwesh Babruwan Meshram
@cipet.gov.in
Assistant Technical Officer (Toolroom)
Central Institute of Plastics Engineering and Technology, Lucknow, Uttarpradesh
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
M. S. Tufail, R. B. Chadge, K. S. Ansari, and D. B. Meshram
Springer Nature Singapore
Darpan Satija, Pranoti Bhute, Vikas Gohil, and Diwesh Babruwan Meshram
Elsevier BV
Diwesh Babruwan Meshram, Vikas Gohil, Yogesh Madan Puri, and Sachin Ambade
Emerald
Purpose Machining of curved channels using electrical discharge machining (EDM) is a novel approach. In this study, an experimental setup was designed, developed and mounted on die-sinking EDM to manufacture curve channels in AISI P20 mold steel. Design/methodology/approach The effect of specific machining parameters such as peak current, pulse on time, duty factor and lift over material removal rate (MRR) and tool wear rate (TWR) were studied. Multi-objective optimization was performed using Taguchi technique and Jaya algorithm. Findings The experimental results revealed current and pulse on time to have the predominant effect over material removal and tool wear diagnostic parameters with contributions of 39.67, 32.04% and 43.05, 36.52%, respectively. The improvements in material removal and tool wear as per the various optimization techniques were 35.48 and 10.91%, respectively. Originality/value Thus, Taguchi method was used for effective optimization of the machining parameters. Further, nature-based Jaya algorithm was implemented for obtaining the optimum values of TWR and MRR.
Sachin Ambade, Chetan Tembhurkar, Awanikumar Patil, and Diwesh Babruwan Meshram
Emerald
Purpose This paper aims to study the effect of number of welding passes on microstructure, mechanical and corrosion properties of 409 M ferritic stainless steel. Shielded metal arc welding (SMAW) process is used to weld two metal sheets of 409 M having 3 mm thickness as bead-on-plate with single, double and triple passes. Microstructures were observed at transverse section with the help of optical microscope and with increasing number of passes grain growth, and the width of heat-affected zone (HAZ) increases. The results of tensile tests revealed that as number of passes increases, there is reduction in tensile strength and ductility. Double loop electrochemical potentiokinetic reactivation (DL-EPR) test revealed that as number of passes increases, the degree of sensitization increases. This is due to the deposition of chromium carbides at the grain boundaries and the associated depletion of chromium. Design/methodology/approach Three welded plates of single, double and triple pass were welded by SMAW process. From three welded plates (single, double and triple passes), samples for microstructural examination were cut in transverse direction (perpendicular to welding direction) with the help of wire-cut electrical discharge machine (EDM). The welded plates were sliced using wire-cut EDM along transverse direction for preparing optical microscopy, tensile testing, microhardness and DL-EPR testing specimens. Findings From the microstructure, it was observed that the large grain growth, which is dendritic, and the structure become finer to increase in number of welding passes. As number of passes increases, the width of HAZ increases because of the higher temperature at the welded zone. The tensile strength decreases to increase the number of welding passes because of grain coarsening and chromium carbide precipitation in sensitized zone and wider HAZ. The maximum microhardness value was observed for single-pass weld as compared to double- and triple-pass welds because of the fast cooling rate. The degree of sensitization increases to increase the number of passes because of chromium carbide deposition at the grain boundaries. Originality/value The authors declare that the manuscript is original and not published elsewhere, and there is no conflict of interest to publish this manuscript.
Sachin Ambade, Ravinder Kataria, Chetan Tembhurkar, and Diwesh Meshram
Informa UK Limited
Sachin Ambade, Awanikumar P. Patil, Chetan K. Tembhurkar, and Diwesh B. Meshram
Informa UK Limited
D. B. Meshram and Y. M. Puri
Springer Science and Business Media LLC
In this paper, a new electrical discharge machining (EDM) is proposed. This EDM is existed as the resultant of the optimized analysis of the structure of Taguchi’s technique. The optimized analysis lies with the advanced statistical tool referred as analysis of variance (ANOVA). ANOVA-based dynamic analysis over optimization of the structure of the Taguchi’s mechanism sets as the curve. This curve is semicircular. Thus, an optimized semicircular curved EDM process came in the existence. This is an efficient process proved by ANOVA. Its application also presented in this paper as curvature channel. This is an optimized curvature channel based on semicircular EDM process. The optimality lies with the decision variables as optimal parameters obtained by ANOVA over Taguchi’s method. The comparative analysis of the conventional curvature channel existed curvature channel mechanism and the proposed process also presented in this paper. The resultant is set as an advanced curvature channel with unique characteristics. Improved efficiency by optimized structure, minimized error by ANOVA and dynamic performance by optimized programming are some key characteristics of the proposed process. There are certain new and optimal parameters are applied to develop this mechanism. The time, speed, structure, dimension, linear and nonlinear constraints are the such key optimal parameters. The proposed curved EDM process interacts with the motion of electrodes. The oscillating motion is applied to develop this process instead the horizontal and vertical motion. Basically, the proposed process is based on the nonlinear motion of electrodes instead of linear motion.
Diwesh B. Meshram, Yogesh. M. Puri, Vikas Gohil, and Sachin P. Ambade
Informa UK Limited
This paper presents a novel Variable Oscillating EDM process through a mechanism provided on the Z-axis numerical control EDM for machining the curvature channel. The specific trajectory is machine...
D. B. Meshram and Y. M. Puri
Springer Science and Business Media LLC
Manufacturing is one of the most important sectors. It involves various machining operations to be performed on the workpiece, through which the output can be achieved. Global competition calls for quick manufacturing in new product development. Electrical discharge machining (EDM) is one of the sustainable manufacturing techniques available for machining the complex workpieces. Recently EDM development is taking place rapidly. Many researchers have focused on spark generation in EDM for continuous improvement. Electrical discharge machining requires the tool (master pattern) and workpiece (replica of master pattern). It works on the principle of spark erosion process. The generation of spark erosion distinguishes this non-traditional manufacturing method from traditional one. Most of the EDM utilizes the linear travels of head during machining of the workpiece. So, constrained restricted to only horizontal or vertical machining surface irrespective of curved surface machining. This review paper explains the mechanisms and methods adopted for developing the curved hole machining. These mechanisms enhance the utility and applications in the field of aerospace, molding and automobile industries.