Propagation of Gas Bubbles at Spark Erosion in Small Working Gaps

Schulze, H.‐P.; Wollenberg, G.; Mecke, K.; Trautmann, Helmut

doi:10.1109/icpadm.2006.284265

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…At each final oscillation period, the collective implosion of bubbles from the gap is produced, resulting in shock waves parallel to the machined surface which evacuates the material out of the working gap, and decreases roughness by removing micropeaks with low shear resistance. If the cumulative microjets (CMS) overlaps with a discharge pulse, most of the melted material that was innaccesible due to the gas bubble having longer time span [23], is evacuated, significantly improving productivity.…”

Section: Specific Phenomenamentioning

confidence: 99%

Thermal and Mechanical Influence of Ultrasonically Aided Electrical Discharge Machining on Co-Cr Alloys

Cristea

Ghiculescu

Mnerie

2020

AMR

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Section: Specific Phenomenamentioning

confidence: 99%

Thermal and Mechanical Influence of Ultrasonically Aided Electrical Discharge Machining on Co-Cr Alloys

Cristea

Ghiculescu

Mnerie

2020

AMR

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“…ey found that the radial flow and bubble oscillation difference make the material removal rate in the water higher than that of oil. Schulze et al studied the propagation of gas bubble during the discharge process using high-speed frame camera [12,13]; it was observed that a higher discharge current and longer pulse duration time would be beneficial to the bubble propagation process.…”

Section: Introductionmentioning

confidence: 99%

Study of Working Medium Performance by Acoustic Emission in EDM Machining of Ti6Al4V

Guo

Sun

et al. 2020

Advances in Materials Science and Engineering

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In electrical discharge machining (EDM), the working medium plays an important role in the material removal process. Lots of methods have been utilized to study this process, but a widely accepted explanation about this process has not been yet accomplished. In this study, the acoustic emission (AE) sensor was fixed on EDM machine to study the material removal process by observing the expansion and contraction process of gas bubble surrounding the discharge plasma. The machining performance in different working mediums was studied for Ti-6Al-4V machining in air, kerosene, and water-based emulsion. Discharge in different working mediums would result in different material removal rates and surface quality. The difference of AE wave frequency domain distribution for discharge in different working mediums was studied. It was observed that the frequency of acoustic emission wave generated by discharge in different working mediums would be different. The characteristic difference of single AE wave generated by discharge in air, kerosene, and water-based emulsion was compared. It was found that the duration time and peak amplitude of acoustic emission wave generated by discharge in different working mediums were different, and the acoustic emission wave generated by discharge in water-based emulsion would last longer and get higher peak amplitude compared to discharge in air and kerosene. The significant difference of AE wave generated by discharge in water-based emulsion from that in kerosene was found. Based on the acoustic emission wave observation, the special characteristic of the material removal process for discharge in water-based emulsion was found.

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Numerical study of the dielectric liquid around an electrical discharge generated vapor bubble in ultrasonic assisted EDM

Shervani-Tabar

Mobadersany

2013

Ultrasonics

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Propagation of Gas Bubbles at Spark Erosion in Small Working Gaps

Cited by 3 publications

References 5 publications

Thermal and Mechanical Influence of Ultrasonically Aided Electrical Discharge Machining on Co-Cr Alloys

Thermal and Mechanical Influence of Ultrasonically Aided Electrical Discharge Machining on Co-Cr Alloys

Study of Working Medium Performance by Acoustic Emission in EDM Machining of Ti6Al4V

Numerical study of the dielectric liquid around an electrical discharge generated vapor bubble in ultrasonic assisted EDM

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