Effects of electrical parameters, its interaction and tool geometry in electric discharge machining of titanium grade 5 alloy with graphite tool

Sivam, S.P. Sundar Singh; Michaelraj, Antony L; S, Satish Kumar; Varahamoorthy, R.; Dinakaran, D.

doi:10.1177/0954405412466213

Cited by 16 publications

(7 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After all the holes were made, TMR and GWR were calculated using equations (1) and (2), respectively 8…”

Section: Experiments Detailsmentioning

confidence: 99%

“…2 Review articles were published 3,4 in 2010 elaborating the status of research in the field of EDM. As per the literature survey, a study of the machinability of titanium alloys using EDM with different tool materials under different conditions has been carried out 5–8 in the literature. However, one important concern of industries is to find the optimum machining parameters to improve the overall productivity at less cost.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Statistical multi-objective optimization of electrical discharge machining parameters in machining titanium grade 5 alloy using graphite electrode

Sivam

Michaelraj

Kumar³

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part B:

Self Cite

View full text Add to dashboard Cite

In industrial applications, particularly in aero, marine and medical industries, titanium has received great attention as a useful material and electrical discharge machining as its machining process. Selection of optimal machining parameters in a multi-objective environment is essential for specific workpiece and tool material combination, which is the concern of industries to improve the overall productivity at less cost. In this article, optimization of critical electrical discharge machining parameters such as pulse current, on time of pulse, off time of pulse and tool geometry depending on the responses such as titanium machining rate, graphite wear rate, surface roughness and deviation between entry and exit while machining titanium grade 5 alloy with graphite tool electrode at negative polarity is presented. Taguchi’s L27 orthogonal array was used to design the experiment with interaction between factors. The weighing method was used to integrate different objectives into one performance. The optimal combination of process parameters was found statistically using signal-to-noise ratios. Significance was checked by analysis of variance. Optimum parameters were found to be pulse current 15 A, on time of pulse 50 µs, off time of pulse 200 µs and cylindrical tool geometry. Resultant percentage improvements in different responses were presented.

show abstract

“…After all the holes were made, TMR and GWR were calculated using equations (1) and (2), respectively 8…”

Section: Experiments Detailsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Statistical multi-objective optimization of electrical discharge machining parameters in machining titanium grade 5 alloy using graphite electrode

Sivam

Michaelraj

Kumar³

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part B:

Self Cite

View full text Add to dashboard Cite

show abstract

“…Non-contact material removal processes such as WEDM is an attractive alternative 6 as it eliminates the requirement for expensive tooling. 7,8 Research on the EDM process for MMC components includes the assessment of die sink EDM MMCs reinforced with Al 2 O 3 as well as corresponding matrix material (Al6061), as mentioned in Mouangue et al 9 It is suggested that the tool wear rate and material removal rate are acceptable at low peak current, short time and longer off time. The performance of WEDM cutting MMCs is less effective when compared with Al6061 material because the removal rate is less, and thus, the tool wear is increased.…”

Section: Introductionmentioning

confidence: 99%

Accuracy and finish during wire electric discharge machining of metal matrix composites for different reinforcement size and machining conditions

Pramanik

Islam

Boswell

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

Electric discharge machining (EDM) has been established as an effective alternative process to conventional material removal processes for machining reinforced metal matrix composites (MMCs). Wire cut EDM holes were produced in a MMCs (10 vol% of SiC in 6061 Al), which were then investigated to determine the machinability of the material using this process. It was observed that the input factors such as the size of reinforced particles, wire tension, and pulse on time, significantly affect diameter error, circularity and surface roughness. Pulse on time, the interaction between pulse on time and wire tension contribute to the maximum diameter error. The wire tension is the most significant factor to circularity, which is followed by the interaction between pulse on time. In particular, wire tension with low and high tensions results in poor circularity. It has been found that there are more surface defects encountered when particle sizes are smaller, and circularity is improved when particles are in a medium size. In addition, the surface defect is reduced as the particles increase the melting resistance of the surface. The higher pulse on time leads to higher heat and more time to degrade the surface. Therefore, low pulse on time and wire tension gave better surface finish.

show abstract

“…More and more attention has been paid to micro EDM, especially in the industries of aerospace, die and mold making, automotive, medical and so on. 2,3 Micro EDM is capable of machining not only micro holes and micro shafts smaller than 5 µm in diameter but also complex three-dimensional micro cavities. 4–8…”

Section: Introductionmentioning

confidence: 99%

Effects of grain size of AISI 304 on the machining performances in micro electrical discharge machining

Liu

Zhang

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

The material removal process of micro electrical discharge machining is based on the instantaneous ultra-high temperature generated by a series of repetitive discharge pulses. Due to the size effects, the polycrystal cannot be considered as continuous and homogeneous material when machining is in micron scale, and the effects of material microstructure should not be neglected. In this article, the thermoelectric characteristics of grain and grain boundary are discussed, and the influence of grain size on the machining performances in micro electrical discharge machining is researched. Two kinds of austenitic stainless steels (AISI 304) which are different in grain size are chosen as the workpieces in experiments. It is verified by both theory models and experimental results that the smaller the grain size, the higher the material removal rate, under the same discharge conditions. Both thermal conductivity and melting point of the grain boundary are lower than those of the grain because of the grain boundary segregation. The effective thermal conductivity and local effective melting point of polycrystalline materials vary with their grain sizes since the grain boundary volume fractions change. As a consequence, the material removal rate of micro electrical discharge machining has direct relationship with grain size of the workpiece.

show abstract

Effects of electrical parameters, its interaction and tool geometry in electric discharge machining of titanium grade 5 alloy with graphite tool

Cited by 16 publications

References 8 publications

Statistical multi-objective optimization of electrical discharge machining parameters in machining titanium grade 5 alloy using graphite electrode

Statistical multi-objective optimization of electrical discharge machining parameters in machining titanium grade 5 alloy using graphite electrode

Accuracy and finish during wire electric discharge machining of metal matrix composites for different reinforcement size and machining conditions

Effects of grain size of AISI 304 on the machining performances in micro electrical discharge machining

Contact Info

Product

Resources

About