Materials used for sinking EDM electrodes: a review

Czelusniak, Tiago; Higa, Camila F.; Torres, Ricardo; Laurindo, Carlos Augusto Henning; Júnior, José Mário Fernandes de Paiva; Lohrengel, Armin; Amorim, Fred L.

doi:10.1007/s40430-018-1520-y

Cited by 65 publications

(19 citation statements)

References 118 publications

(166 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In ED-Machining, there is no direct contact between workpiece and electrode; discrete electrical discharges are produced between them in a liquid dielectric medium. ED-Machining high temperatures of about 20,000 °C, during the spark occurrence, are responsible to melt and vaporize small amounts of material of both workpiece and electrode, with no mechanical stresses taking place 2,3 .…”

Section: Introductionmentioning

confidence: 99%

“…Discharge energy (W e ≈ u e .i e .t e [mJ], where u e is the discharge voltage, i e is the discharge current, t e is the discharge durantion) used in working gap is the main ED-machining factor responsible to process performance in terms of material removal rate V w [mm 3 /min], volumetric relative wear ϑ (ϑ = electrode wear rate [mm 3 /min]/material removal rate [mm 3 /min]) , workpiece surface integrity and cavity geometrical characteristics 6 . Duszová et al 7 evaluated EDM parameters conditions for machining WC-Co using CuW (70%W and 30%Cu) electrodes in different ED-machining regimes, searching for improved data for volumetric relative wear ϑ, material removal rate V w and surface roughness R a .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On Geometrical Characteristics of WC-Co Round Cavities After ED-Machining with Different Grades of CuW Electrodes

et al. 2020

Self Cite

View full text Add to dashboard Cite

Cemented carbides (WC-Co) are difficult to be processed by conventional machining processes. Electrical discharge machining (EDM) appears as an efficient technology to manufacture WC-Co products with high accuracy. In EDM literature no research works investigating the influences of different grades of CuW electrodes on geometrical characteristics when ED-machining the same cemented carbide was found. This work presents an investigation on ED-Machining of cemented carbide (WC-Co) with 10% Co using two grades of coper-tungsten (CuW) electrodes with 65% and 85% of tungsten. ED-Machining experiments were carried out under rough, semifinish and finish regimes with input variables discharge current i e , discharge duration t e and pulse interval time t o using analysis of variance (ANOVA) based on design of experiments with complete factorial 3 2. Output variables evaluated were WC-Co workpiece geometrical characteristics 3D surface roughness and round cavities circularity measures. Results showed that ED-Machining regime is the most significant parameter on both WC-Co workpiece circularity and surface roughness measures. Electrodes grades CuW65 and CuW85 presented similar results on workpiece circularity and 3D surface roughness.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On Geometrical Characteristics of WC-Co Round Cavities After ED-Machining with Different Grades of CuW Electrodes

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The machining characteristic of EDM depends greatly on the selection of the right combination of the electrode and the tool material. Copper (Cu), graphite (Gr), brass (Cu-Zn), aluminum (Al), zinc (Zn), tungsten–copper (Cu-W) and tungsten (W) are universally used EDM tool materials (Czelusniak et al , 2019).…”

Section: Decision-making Problemsmentioning

confidence: 99%

Integrated MOORA-ELECTRE approach for solving multi-criteria decision problem

Ranjith¹,

Vimalkumar²

2021

WJE

View full text Add to dashboard Cite

Purpose The most difficult tasks in the design and development of products for diverse engineering applications were the selection of suitable materials. Choice of inappropriate process variables leads to poor performance, which increases the cost of the product. The selection of the best option of available alternatives is important to improve the performance and productivity of the manufacturing enterprises. Design/methodology/approach The paper aims to develop Hybrid Multi-Criteria Decision Making (HMCDM) by integrating two potential optimization techniques Elimination Et Choix Traduisant la REalité and multi-objective optimization on the basis of ratio analysis. The weight of the criteria was calculated using the critic weight method. Findings The efficiency and flexibility of the proposed HMCDM technique were illustrated and validated by two examples. In the first case, the best electrode material among the five available alternatives was selected for the electrical discharge machining of AZ91/B4Cp magnesium composites. In the second case, the optimum weight percentage of composites providing the best tribological properties was chosen. Originality/value It was noted that the HMCDM methodology was quite simple to comprehend, easy to apply and provided reliable rankings of the material alternatives. The proposed hybrid algorithm is suitable for product optimization as well as design optimization.

show abstract

“…vaporizes after repeated spark and finally it is removed from the discharge zone by flushing actions [1]. A lot of researches have been performed in this domain, which discuss about the merits and demerits of this process along with the notable impacts on the responses like material removal rate (MRR), surface roughness (SR), tool wear (TW), surface integrity, and surface texture.…”

Section: Introductionmentioning

confidence: 99%

Feasibility assessment of some alternative dielectric mediums for sustainable electrical discharge machining: a review work

Das

Paul

Doloi

2020

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

Low removal rate, high power consumption, and dependency on conventional fuels (kerosene as a dielectric) are some premier issues that keep the sustainability index of EDM low, though it has huge acceptability and popularity mostly in aviation sectors and biomedical instrumentation to machine some extensively hard ferrous and nonferrous metal/metal alloys. Besides these, the thermal agitation inside the fusion/machining zone partially burns the dielectrics and tool-workpiece-metal, which evolve some oxides/monoxides. These evolved gases promote an unhygienic breathing atmosphere, which is very much harmful to the operator's health. Sometimes because of inadequate flushing pressure and velocity, carbon particles deposited inside the crater makes the spark unstable and releases carbon monoxide when the temperature exceeds its melting point. According to ISO 14000, every manufacturing process must be comprised of the sustainability criteria, which maintains a compromised balance between the economic, environmental, and social aspects, including the issue of the operator's health. But in real practices, it is very tough to maintain a stoichiometric balance between all these constraints. The article intensely focuses on the issue of emergence of gases during machining and tries to promote the utility of some alternative vegetable oil-based dielectrics, which are experimentally justified as a potent alternative of conventional kerosene. Apart from these, it includes some comparative talks on dielectric nature and their impacts on the responses and surface properties. Finally, this article highlights some compromise solutions which are probably capable of mitigating the hurdles to some extent, so that the sustainable machining can be encouraged in real sense.

show abstract

Materials used for sinking EDM electrodes: a review

Cited by 65 publications

References 118 publications

On Geometrical Characteristics of WC-Co Round Cavities After ED-Machining with Different Grades of CuW Electrodes

On Geometrical Characteristics of WC-Co Round Cavities After ED-Machining with Different Grades of CuW Electrodes

Integrated MOORA-ELECTRE approach for solving multi-criteria decision problem

Feasibility assessment of some alternative dielectric mediums for sustainable electrical discharge machining: a review work

Contact Info

Product

Resources

About