Influence of polarity on the performance of Blasting Erosion Arc Machining

Zhao, Wansheng; Xu, Hanlin; Gu, Lixu; Han, Hong; Rajurkar, K. P.

doi:10.1016/j.cirp.2015.04.032

Cited by 26 publications

(6 citation statements)

References 10 publications

(10 reference statements)

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“…14 performed the positive and the negative BEAM on 20 vol.% SiC/Al MMC by varying peak current, pulse-on time, and pulse-off time. Similar to the study of Zhao et al., 13 they also concluded that the negative BEAM results in much greater MRR than the positive BEAM. Under a peak current of 500 A, they obtained an MRR of 8276 mm 3 /min during the negative BEAM.…”

Section: Review Of Eamsupporting

confidence: 81%

“…Zhao et al. 13 performed BEAM on the AISI D2 steel using bundled graphite electrode and water-based dielectric fluid. The input control factors selected were peak current, pulse-on time, pulse-off time, polarity, and flushing pressure of the fluid.…”

Section: Review Of Eammentioning

confidence: 99%

“…Zhao et al. 13 during the machining of AISI D2 steel observed that the negative BEAM results in very high SR of the order of 360 µm, and on other hand the positive BEAM results in lesser SR (of the order of 28 µm). Further, they observed that with the increase in the peak current and pulse duration, the SR increases for both positive and negative BEAMs.…”

Section: Review Of Eammentioning

confidence: 99%

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Electrical arc machining: Process capabilities and current research trends

Shrivastava

Pandey

Dangi

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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Electrical arc machining is the thermal energy-based unconventional machining process, which utilizes energy of arc to melt and vaporize workpiece material. Electrical arc machining has the capability to machine advanced materials such as metal matrix composites, superalloys, and conductive ceramics effectively. The process is considered to be efficient than most of the other unconventional machining processes in terms of the material removal rate. But it has got limitations because it results in a very poor surface finish. Tool wear rate, recast layer formation, surface and subsurface cracks, and geometrical inaccuracy are other limitations up to a certain extent. In this paper, the comprehensive review of research carried out so for in the area of electrical arc machining has been presented. The paper discusses the detailed experimental and theoretical studies done on electrical arc machining to elucidate the effects of various input control factors on different quality characteristics. The paper also contains modeling and optimization studies done so far in electrical arc machining and finally discusses the future research possibilities in the area.

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Section: Review Of Eamsupporting

confidence: 81%

Section: Review Of Eammentioning

confidence: 99%

Section: Review Of Eammentioning

confidence: 99%

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Electrical arc machining: Process capabilities and current research trends

Shrivastava

Pandey

Dangi

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Yadav and Yadava (2015) studied the in uences of the electrical parameters and rotation speed on the dimensional accuracy and surface quality of titanium alloys during EDM drilling; a rotating electrode was found to have the most signi cant impact on the results [6]. Zhao et al (2015) proposed blasting erosion processing using multi-hole electrodes, which signi cantly improved the processing e ciency [7]. Han et al (2009) found that the electrode loss can be effectively reduced in conventional EDM under oil dielectric conditions [8].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on high-efficiency DC short electric arc milling of titanium alloy Ti6Al4V

Zhou

Liu

et al. 2021

Int J Adv Manuf Technol

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Short electric arc milling (SEAM) is an e cient electrical discharge machining method, especially for the e cient removal of di cult-to-machine conductive materials with high hardness, high toughness, and wear resistance. In this study, titanium alloy Ti-6Al-4V is used as the research object to conduct machining experiments. The material removal mechanism of SEAM technology is studied using a DC power supply and different tool electrode materials (copper, graphite, Q235 steel, and titanium). The energy distribution of the discharge gap is analyzed using a data acquisition system and a high-speed camera. The arc is found to move with the spindle rotation in the process of arc discharge, and multipoint discharge occurs in the process of single-arc discharge. The voltage and current waveforms and the radius of the etched particles during the experiment were counted, the material removal rate (MRR) and relative tool wear rate (RTWR) are calculated, and the surface and cross-section micromorphology and hardness are analyzed. The experimental results show that when the electrode material is graphite, the maximum feed rate is 650 mm/min, the MRR can reach 17268 mm 3 /min, the ideal maximum MRR is more than 65000 mm 3 /min, and the RTWR is only 1.27%. When the electrode material is Q235 steel, the minimum surface roughness is 35.04 µm, and this material has good stability under different input voltages. When the electrode material is copper, the hardness of the resolidi ed layer is close to that of the base material, which is bene cial for further processing. The lowest speci c energy consumption is 18.26 kJ/cm 3 when titanium is used as the electrode material.

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“…19 Recently, Zhang et al 20 found that the processing factors including discharge medium, tool polarity, tool material, voltage and rotational speed have obvious effects on MRR and TWR in electro-arc machining. Zhao et al 21 illustrated that it was possible to machine with high efficiency and a better control of the profile and surface quality of the workpiece by combining negative and positive tool polarities of BEAM processes together. Xu et al 22 also revealed that by optimizing the combination of the negative and the positive BEAM processes, it was possible to attain favorable machining performances of high MRR and finer Ra while machining the nickel-based high-temperature alloy GH4169 (similar to Inconel 718) with a bundled electrode or a multi-hole solid electrode.…”

Section: Introductionmentioning

confidence: 99%

Influence of flushing holes on the machining performance of blasting erosion arc machining

Zhao

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part B:

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Blasting erosion arc machining is a novel electrical erosion process depending on the hydrodynamic arc-breaking mechanism to achieve a reliable high-efficiency machining. In blasting erosion arc machining, the high-velocity fluid field in the discharging gap is the precondition of the mechanism to control arc plasma to efficiently remove workpiece material. Therefore, this study mainly investigates the influence of flushing holes on the fluid field distribution directly and on the machining performance indirectly. Three multi-hole solid electrodes with different types of flushing holes are designed out according to the distributing principle. The influence of their flushing holes on the fluid field is conducted by a comparison fluid simulation which demonstrates that the electrode with flushing-hole diameters decreasing gradually from the inner to the outer in the radial direction attains the best flushing velocity distribution on the workpiece surface. Furthermore, the influence of their flushing holes on the blasting erosion arc machining performance is investigated by a comparison machining experiment in order to verify the comparison results of fluid field simulation. The experimental results illustrate that these electrodes have very different machining performance when machining nickel-based high-temperature alloy GH4169 (similar to Inconel 718) under the conditions of same discharge peak current and flushing inlet pressure. The electrode with the best flushing velocity distribution rather than with the highest velocity at a particular point achieves the best machining performance of the highest material removal rate, the least relative tool wear ratio and the least surface roughness (Ra), indicating an optimized design of flushing holes in the multi-hole solid electrode.

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Influence of polarity on the performance of Blasting Erosion Arc Machining

Cited by 26 publications

References 10 publications

Electrical arc machining: Process capabilities and current research trends

Electrical arc machining: Process capabilities and current research trends

Experimental study on high-efficiency DC short electric arc milling of titanium alloy Ti6Al4V

Influence of flushing holes on the machining performance of blasting erosion arc machining

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