Review of research work in die sinking EDM for machining curved hole

Meshram, Diwesh Babruwan; Puri, Y. M.

doi:10.1007/s40430-016-0622-7

Cited by 27 publications

(9 citation statements)

References 52 publications

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“…However, it is possible to state the standard deviation from the analysis of the measurement system, and the basis of this method is a one-way ANOVA. If we look at the measurement of wear in the second corner as a repeated measurement of the same quantity, the standard deviation can be calculated from formula (1). The standard deviation of the repeatability of the wear measurement was s(W) = 7.287 µm and the measurement system is capable.…”

Section: Analysis Of Electrode Wear In Corners and Edgesmentioning

confidence: 99%

“…Machining is carried out without the contact of the tool (electrode) with the workpiece; therefore, there are no conventional cutting forces and the resulting workpiece is not stressed by them. This allows producing thin-walled profiles from soft materials which are conventionally very difficult to manufacture [1]. It is possible to machine all at least minimally electrically conductive materials regardless of their toughness, hardness, or mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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The analysis of EDM electrodes wear in corners and edges

Mouralová

Bednár

Beneš

et al. 2020

Archiv.Civ.Mech.Eng

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Die-sinking electrical discharge machining is an unconventional technology that allows to machine all at least minimally electrically conductive materials regardless of their physical and mechanical properties. Despite the fact that it is not a conventional technology, the tool gets also worn out, which is a tool electrode. The wear of the electrode does not only mean its loss but also the degradation of the shapes that are transferred to the resulting workpiece. For this reason, a design of experiments was conducted with 6 input factors, 2 were categorical: the electrode material (copper, graphite) and workpiece material (steel 1.2363 and steel 1.2343ESR) and 4 were numerical: Open-voltage, Pulse current, Pulse on-time, and Pulse off-time. In the framework of this design of experiments, the wear of the used graphite and copper electrodes at their corners and edges was evaluated, which was made possible by the use of electron microscopy and the use of approximation circles. Furthermore, the eroding speed, the topography of the machined samples, and the morphology of the surfaces of the used electrodes were investigated. It has been recognized that the use of a graphite electrode will allow for more accurate workpiece shapes and less wear.

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Section: Analysis Of Electrode Wear In Corners and Edgesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The analysis of EDM electrodes wear in corners and edges

Mouralová

Bednár

Beneš

et al. 2020

Archiv.Civ.Mech.Eng

View full text Add to dashboard Cite

show abstract

“…In 2017, we [1] presented the survey on the die-sinking EDM process. It generalizes to curved hole-based machining.…”

Section: Introductionmentioning

confidence: 99%

Optimized curved electrical discharge machining-based curvature channel

Meshram

Puri

2020

J Braz. Soc. Mech. Sci. Eng.

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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.

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“…Debris is flushed away with deionized water which is also used as a dielectric medium during machining [10]. Complex-and delicate-shaped parts and dies used in aerospace, automobile, and surgical industries are mostly manufactured by EDM process [11]. CS, Ra, and Kf are the major characteristics to measure the machining performance of WEDM [12].…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of WEDM using cold treated brass wire for HSLA hardened steel

Tahir

Jahanzaib

2019

J Braz. Soc. Mech. Sci. Eng.

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The present study analyzed the effects of cold treated brass wire electrode for the machining of hardened high-strength low-alloy (HSLA) steel on wire electric discharge machine. Cold treatment of brass wire at − 70 °C for 24 h has refined its microstructure which results in an increase in electrical conductivity by 24.5%. The experimental work is designed using fractional factorial design to determine the relationship of input variables including servo voltage (SV), pulse on time (T on), pulse off time (T off), wire type (W t), wire tension (T w), and flushing pressure (F p) and response measures including cutting speed (CS), surface roughness (Ra), and kerf width (Kf). In W t , two kinds of brass wires including cold treated (CT) and non-cold treated (NCT) have been used. Empirical models for cutting speed (CS), surface roughness (Ra), and kerf width (Kf) are developed, and their contribution is analyzed through the analysis of variance (ANOVA) technique. Desirability function offers the best combination of input variables to maximize CS and minimize both Ra and Kf simultaneously. T on is observed as the most effective input variable for all response measures, followed by W t and T off. CT brass wire has been observed as the best alternative in multi-objective optimization.

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Review of research work in die sinking EDM for machining curved hole

Cited by 27 publications

References 52 publications

The analysis of EDM electrodes wear in corners and edges

The analysis of EDM electrodes wear in corners and edges

Optimized curved electrical discharge machining-based curvature channel

Multi-objective optimization of WEDM using cold treated brass wire for HSLA hardened steel

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