Performance evaluation of cryogenically assisted electric discharge machining (CEDM) process

Goyal, Rachin; Sngh, Sehijpal; Kumar, Harish

doi:10.1080/10426914.2017.1317789

Cited by 23 publications

(9 citation statements)

References 34 publications

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“…In this mechanism, operation length and the diameter of the work piece are respectively 28 and 15 mm. In this machining, the dielectric fluid is kerosene oil (Gill and Singh, 2010). The electrode material used in EDM is the copper electrode, having 100 HB (HB -Brinell hardness unit) hardness and a electrical resistivity of 9 µ cm.…”

Section: Materials Detailsmentioning

confidence: 99%

“…After reaching the temperature of an electrode at such a limit, the material is sunk at a same temperature for approximately 1 d. After that, the electrode is removed from liquid nitrogen and goes through the heat treatment process. In this heat treatment process, electrode heats up from room temperature to above 100 • C and cools down at room temperature in ambient air (Gill and Singh, 2010;Dhanachezian et al, 2011;Singh et al, 2015). In this treatment, phase transformation occurs, and this transformation increases the hardness of the tool material when austenite starts converting into martensite; but during this transformation, all austenite did not convert into martensite (Kumar et al, 2012;Kalsi et al, 2010).…”

Section: Cryogenic Treatmentmentioning

confidence: 99%

“…S. found that the deep cryogenic treatment of Titanium alloys increases the material removal rate while increasing the thermal and electrical conductivity. Goyal et al (2018) performed an experiment on the AISI D2tool steel with a copper electrode and found that the material removal rate increased by approximately 18 % and surface roughness reduced by 11 % approximately with the cryogenic tool. Abdulkareem et al (2010) investigated the effect of electrode cooling on electrode wear.…”

Section: Conformation Testmentioning

confidence: 99%

“…The electrical discharge machining (EDM) is widely used to machine a very hard surface material at a low cost and with fewer hardness tools (Huang et al, 2003). This machining operation was improved and upgraded with time (Habib and Sameh, 2009). In the 1930s, EDM came into existence for the first time for a machining purpose, but due to overheating, lower material removal rate (MRR) and lower quality of the machined surface, it could not be used on a large scale.…”

Section: Introductionmentioning

confidence: 99%

“…Kumar and M (2014) performed an experiment on a cryogenic cooled electrode and found a more beneficial effect on the machining operation than the conventional electrode. Gill and Singh (2010) investigated the effect of deep cryogenic treatment on the Ti 6246 alloy for a machining purpose. The investigators found a higher material removal rate and lower tool wear rate.…”

Section: Introductionmentioning

confidence: 99%

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Effect of deep cryogenic treatment on copper electrode for non-traditional electric discharge machining (EDM)

Grewal

Dhiman²

2019

Mech. Sci.

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Abstract. In the last few decades, non-traditional machining made the machining process easier than the traditional machining method. Electric discharge machining (EDM) is one of the most prominent methods of non-traditional machining processes. By the use of EDM, a complex profile and high hardness materials can be easily machined, which cannot easily be machined by the traditional machining method. EDM is widely used by the industries. This paper investigates an experiment with the cryogenically treated copper electrode and an ordinary copper electrode with various input parameters like the electrode rotation, gap voltage and discharge current for an EN24 (a high-strength and wear-resistant steel) material. An experiment was performed with electric discharge machining. Designs of an experiment are carried out using the Taguchi approach. An orthogonal L16 array prepared and used the different combination of the three input parameters (current, electrode rotation and gap voltage) to find an optimum value of the factors. The output factors are the overcut (OC), the tool wear rate (TWR) and surface roughness (Ra). The optimal level and importance levels of each of these parameters are obtained statically using an analysis-of-variance (ANOVA) table through the analysis of the S∕N ratio. The study also compares the theoretical and experimental values of the overcut, tool wear rate and surface roughness for traditional and non-traditional EDM. The following research finds optimal or dominating factors (current and rotational speed) for the TWR and Ra in both traditional and non-traditional electric discharge machining; moreover there was a reduction of approximately 9 % in overcut, 13.25 % in the tool wear rate and 15.75 % in surface roughness for the deep cryogenic and non-traditional machining process.

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Section: Materials Detailsmentioning

confidence: 99%