Manufacturing Technology Today

Alakesh Manna ¹, Samarth Chugh ¹

Affiliations
1 Dept. of Mechanical Engg., Punjab Engg. College, Deemed University, Chandigarh, IN

Abstract

In this paper, experimentally investigated results are utilized to establish the relationship between various input parameters of EDM, namely peak current (I_p), pulse on-time (T_on), duty Cycle (τ) and gap voltage (V_g), and machining characteristics e.g. surface finish, electrode wear rate and material removal rate. The experimentally investigated results were obtained during machining of OHNS die steel using 8 mm diameter of copper electrode on EDM. The Taguchi method, a powerful tool in the design of experiments is utilized to optimize the parametric combiriation of EDM for effective machining of OHNS die steel. AL₁₈ (2¹ × 3⁷) mixed orthogonal array is used for 3⁴ factorial design, and analysis of variance is employed to investigate the influence of the EDM parameters on the surface finish, electrode wear rate and material removal rate. The mathematical models for different machinability criteria are developed to investigate the influence of cutting parameters during machining. Confirmation test results proved that the developed mathematical models are appropriate for machining of OHNS die steel by EDM.

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Nitin K. Lautre ¹, Alakesh Manna ¹

Affiliations
1 Dept. of Mechanical Engg., Punjab Engg. College (DU), Chandigarh, IN

Abstract

The paper presents the experimental investigation into the influence of WEDM parameters on cutting speed, upper and lower portion of machined surface roughness. The effect of cutting parameters on the machining characteristics are experimentally and theoretically investigated during machining of thick E0300 alloy steel by Electronica Sprintcut 734-WEDM. The basic aim of this investigation is to understand the effect of the machining characteristics on. cutting speed and surface roughness. Taguchi methods based L₁₈ mixed orthogonal array is used to determine S/N ratio and analysis of Variance and 'F' test values for indicating the significant parameters affecting the WEDM performance. The significant parameters are optimized and verified through confirmation from the seven selected reference setting parameters. Investigations were carried out considering the upper portion and the lower portion of the machined workpiece for the analysis of upper and lower surface roughness of anode and cathode. SEM results are also studied for the machined wire.

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