Surface modifications of Al–Zn–Mg alloy using combined EDM with ultrasonic machining and addition of TiC particles into the dielectric

Chen, Yong; Lin, Yufeng

doi:10.1016/j.jmatprotec.2008.11.013

Cited by 87 publications

(35 citation statements)

References 17 publications

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“…Heated material is more prone to deformations by hitting abrasive grains and melted material is more efficiently removed (pressed out) from an erosion craters by passing by dielectric liquid, especially when cavitation appears (cavitation erosion) [17,18]. However, in electrodischarge machining in mixture of dielectric liquid and abrasive grains the contribution of mechanical impact of abrasive grain is low due to their low kinetic energy (grains are very light) coming from the dielectric flow or occurring cavitation phenomena.…”

Section: Characterization Of Hybrid Electro-discharge Abrasive Machinmentioning

confidence: 99%

“…What appears important is the impact of powder (also abrasive grains) on electrical field distribution in an interelectrode gap as it causes change in discharge energy sharing between electrode tool and machined part [17][18][19]. Based on analysis of the re-sults, one can expect that more energy is delivered to machined part than to electrode tool.…”

Section: Characterization Of Hybrid Electro-discharge Abrasive Machinmentioning

confidence: 99%

See 1 more Smart Citation

Recent Developments in Abrasive Hybrid Manufacturing Processes

Ruszaj

Skoczypiec

Wyszyński

2017

Management and Production Engineering Review

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Recent dynamic development of abrasive hybrid manufacturing processes results from application of a new difficult for machining materials and improvement of technological indicators of manufacturing processes already applied in practice. This tendency also occurs in abrasive machining processes which are often supported by ultrasonic vibrations, electrochemical dissolution or by electrical discharges. In the paper we present the review of new results of investigations and new practical applications of Abrasive Electrodischarge (AEDM) and Electrochemical (AECM) Machining.

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Section: Characterization Of Hybrid Electro-discharge Abrasive Machinmentioning

confidence: 99%

Section: Characterization Of Hybrid Electro-discharge Abrasive Machinmentioning

confidence: 99%

Recent Developments in Abrasive Hybrid Manufacturing Processes

Ruszaj

Skoczypiec

Wyszyński

2017

Management and Production Engineering Review

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“…Istotny natomiast okazuje się wpływ proszku (również ścierniwa) na rozkład pola elektrycznego w szczelinie, który powoduje zmianę rozdziału energii wyładowania pomiędzy narzędziem a przedmiotem obrabianym [7,9,10]. Na podstawie analizy wyników badań można przypuszczać, że większa ilość energii jest przekazywana do przedmiotu obrabianego, a mniejsza do elektrody roboczej.…”

Section: Charakterystyka Hybrydowych Procesów Obróbki Elektroerozyjnounclassified

Selected issues to abrasive/electrodischarge machining

Ruszaj¹,

Skoczypiec²

2015

Mechanik

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) - Instytut Technologii Maszyn i Automatyzacji Produkcji Politechniki Krakowskiej W ostatnich latach obserwuje się dynamiczny rozwój komunikacji lotniczej, co bezpośrednio wpływa na wzrost produkcji samolotów, a tym samym elementów silników lotniczych. Elementy te są wykonywane ze specjalnych, trudno obrabialnych materiałów stopowych i kompozytowych. Ich efektywne kształtowanie metodami tradycyjnymi jest utrudnione i z tego względu często wykorzystuje się obróbkę elektroerozyjną, w której naddatek usuwany jest w wyniku topienia i parowania. To jednak powoduje powstanie na powierzchni obrabianej warstwy wierzchniej o niekorzystnych właściwościach użytkowych. Można je istotnie poprawić przez obróbkę hybrydową elektroerozyjno-ścierną, której nowe zastosowania opisano w artykule. SŁOWA KLUCZOWE: obróbka hybrydowa, szlifowanie i wycinanie elektroerozyjno-ścierne, obróbka elektroerozyjna w mieszaninie dielektryka i ścierniwa, obróbka specjalnych materiałów Dynamic development of airplane communication takes place in recent years, which directly results in increase of aircraft and aircraft engine parts production rates. Parts of engines are usually made of special alloys or composite materials difficult to machine with use of traditional methods. For efficient machining of these materials electrodischarge process is applied where allowance material is removed by melting and evaporation effect. However, this method of material removal leaves low quality of the machined surface. The surface finish can be significantly improved by applying the hybrid abrasive/electrodischarge process. Presented in the paper is the new practical application of this process. KEYWORDS: hybrid machining, abrasive/electrodischarge grinding and wire cutting, electrodischarge machining in the mix of dielectric and abrasive grains, machining of special materials Rozwój procesów wytwarzania jest stymulowany przez konstruktorów nowoczesnych urządzeń dla przemysłu kosmicznego, zbrojeniowego, lotniczego, motoryzacyjnego, medycznego oraz branży AGD. Przykładowo: przemysł medyczny potrzebuje aparatury, narzędzi (np. chirurgicznych) oraz implantów wykonanych z materiałów charakteryzujących się biokompatybilnością, odpornością na płyny ustrojowe czy brakiem szkodliwego działania na organizm człowie-ka. Materiały, z których produkowane są współczesne konstrukcje, powinny być tak dobrane, by zapewnić właściwe cechy użytkowe (trwałość, niezawodność, funkcjonalność, estetykę), a także niskie koszty produkcji i eksploatacji. Konstruktorzy powinni również uwzględniać w swoich opracowaniach najnowsze osiągnięcia naukowe, szczególnie w zakresie mikro-i nanotechnologii. Umożliwiają one m.in. miniaturyzację elementów, a tym samym -zmniejszenie zużycia materiałów i energii.Aby sprostać współczesnym wymaganiom, intensywnie rozwija się wszystkie metody wytwarzania, a zwłaszcza metody hybrydowe, w których kształtowanie elementu odbywa się z jednoczesnym wykorzystaniem kilku mechanizmów obróbkowych i (lub) kilku form energii [1,2]. Hybrydowe procesy wytwarzania są róż...

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“…During electric discharge machining, the material can be transferred between the electrode and workpiece in the solid, molten or gaseous states simultaneously [24,25]. Figures 17-19 represent the EDS spectral analyses of the unprocessed surface and the machined surface at different machining conditions.…”

Section: Microstructures Of Sic Ceramic Surfaces Machined By End Ed Mmentioning

confidence: 99%

Compound machining of silicon carbide ceramics by high speed end electrical discharge milling and mechanical grinding

Zhang

et al. 2012

Chin. Sci. Bull.

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A compound process that integrates end electrical discharge (ED) milling and mechanical grinding to machine silicon carbide (SiC) ceramics is developed in this paper. The process employs a turntable with several uniformly-distributed cylindrical copper electrodes and abrasive sticks as the tool, and uses a water-based emulsion as the machining fluid. End electrical discharge milling and mechanical grinding happen alternately and are mutually beneficial, so the process is able to effectively machine a large surface area on SiC ceramic with a good surface quality. The machining principle and characteristics of the technique are introduced. The effects of polarity, pulse duration, pulse interval, open-circuit voltage, discharge current, diamond grit size, emulsion concentration, emulsion flux, milling depth and tool stick number on performance parameters such as the material removal rate, tool wear ratio, and surface roughness have been investigated. In addition, the microstructure of the machined surface under different machining conditions is examined with a scanning electron microscope and an energy dispersive spectrometer. The SiC ceramic was mainly removed by end ED milling during the initial rough machining mode, whereas it is mainly removed by mechanical grinding during the later finer machining mode; moreover, the tool material can transfer to the workpiece surface during the compound process. Over the last few years, there has been a great upsurge of interest in advanced ceramic materials. As a result of this interest, significant advances in the development and use of ceramic materials have been made, and the world markets for advanced ceramics are growing. Of the various ceramic materials, silicon carbide (SiC) ceramics are the most interested engineering ceramics because of their combination of outstanding mechanical, physical and chemical properties such as low density, high strength, high thermal conductivity, low thermal expansion coefficient and wear and high corrosion resistance even at elevated temperature [1][2][3]. The broad range of technological applications presently served by SiC ceramics includes cutting tools, automotive engine parts, heat exchangers, high temperature bearings, heavyduty electric contacts, fixtures, nozzles, turbine blades and many more applications [4][5][6]. However, the properties that make these materials appealing to use also create a major challenge in traditional diamond grinding or diamond turning, because of their great hardness and brittleness [7,8]. Electrical discharge machining (EDM) is a thermoelectric process, whereby material is removed by a succession of electrical discharges occurring between an electrode and a workpiece which is immersed in a dielectric liquid medium. Unlike traditional cutting and grinding processes, which rely on the force generated by a harder tool or abrasive material to remove the softer work-material, the EDM process utilizes electrical sparks or thermal energy to erode the unwanted material and generate the desired shape. Since no...

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Surface modifications of Al–Zn–Mg alloy using combined EDM with ultrasonic machining and addition of TiC particles into the dielectric

Cited by 87 publications

References 17 publications

Recent Developments in Abrasive Hybrid Manufacturing Processes

Recent Developments in Abrasive Hybrid Manufacturing Processes

Selected issues to abrasive/electrodischarge machining

Compound machining of silicon carbide ceramics by high speed end electrical discharge milling and mechanical grinding

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