scholarly journals Surface Generation Mechanism in Electrical Discharge Machining with Silicon Powder Mixed Fluid

1997 ◽  
Vol 2 (0) ◽  
pp. 13-18 ◽  
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Silicon Powder ◽  
Generation Mechanism ◽  
Surface Generation ◽  
Mixed Fluid

Characteristics of Electrical Discharge Machining in a Working Fluid Mixed with Micro-Bubbles

2014 ◽  
Vol 625 ◽  
pp. 554-558 ◽  
Author(s):  
Hideki Takezawa ◽  
Kiichi Suzuki ◽  
Naotake Mohri
Keyword(s):  
Surface Roughness ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Pure Water ◽  
Ion Concentration ◽  
Working Fluid ◽  
Water Interface ◽  
Input Energy ◽  
Micro Bubble ◽  
Mixed Fluid

Electrical discharge machining (EDM) is a process of removing material by electric discharge in an insulating working fluid. The material is melted by discharge, the material is thought to blown off by the vaporizing explosion of the working fluid. The removal of the material is affected by the expansion and contraction of a bubble. When the power of the vaporizing explosion is large, the amount of material removed increases, and surface roughness decreases. However, when the power of the vaporizing explosion is small, the amount of material removed decreases and surface roughness increases. The power of the vaporizing explosion is determined by the input energy, and the amount of material removed is determined by the degree of the power of the vaporizing explosion. This study considers the changes in the characteristics of EDM by using a working fluid mixed with micro-bubbles. A micro-bubble is defined as a bubble having a diameter of less than or equal to 50 μm. They have special characteristics of causing an increase in the interior gas pressure, resulting in an increase in ion concentration around the gas–water interface. The vaporizing explosion seems to be weakened by the use of a working fluid mixed with micro-bubbles, and surface roughness seems to be improved. Therefore, we performed EDM using pure water and a micro-bubble mixed fluid to clarify the characteristics of EDM.

Roughness of Small Diameter External Cylindrical Surfaces Obtained by Ram Electrical Discharge Machining

2015 ◽  
Vol 809-810 ◽  
pp. 411-416 ◽  
Author(s):  
Laurenţiu Slătineanu ◽  
Margareta Coteaţă ◽  
Hans Peter Schulze ◽  
Oana Dodun ◽  
Ciprian Mircescu ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Roughness Parameter ◽  
Small Diameter ◽  
Machining Process ◽  
Surface Generation ◽  
Surface Roughness Parameter ◽  
Pulse On Time ◽  
Pulse Off Time

In order to obtain small diameter external surfaces by ram electrical discharge machining from plate workpieces, tubular tool electrodes could be used. In such a case, one can appreciate that the obtained surface is a simple concatenation of cavities appeared as a consequence of electrical discharges developed between the asperities existing initially on the active surface of the tool electrode and surface to be machined of the workpiece. The analysis of the surface generation as a consequence of the electrical discharge machining process showed that due to the surface tensions, a leveling phenomenon could be taken into consideration. An experimental study of influence exerted by some input factors on the surface roughness parameter Ra was designed and achieved. One noticed that the increase of the pulse on time, pulse off time and peak current intensity determines an increase of the surface roughness parameter Ra. By mathematical processing of the experimental results, an empirical model type power function was determined. The examination of the machined surface by means of an optical microscope showed the existence of microcavities generated by the electrical discharge, while the material melted and re-solidified was placed as a bordure of the microcavities.

Recast layer mechanical properties of tool steel after electrical discharge machining with silicon powder in the dielectric

2019 ◽  
Vol 103 (1-4) ◽  
pp. 15-28 ◽  
Author(s):  
Cezar Augusto Oleinik Luzia ◽  
Carlos Augusto Henning Laurindo ◽  
Paulo César Soares ◽  
Ricardo Diego Torres ◽  
Luciano Antonio Mendes ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tool Steel ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Silicon Powder ◽  
Recast Layer

Tribocorrosion Properties of Titanium Alloy Modified By Electrical Discharge Machining

2017 ◽  
Author(s):  
Bruna Michelle de Freitas ◽  
Carlos augusto Henning Laurindo ◽  
Paulo Soares ◽  
Leticia Bemben
Keyword(s):  
Titanium Alloy ◽  
Electrical Discharge ◽  
Electrical Discharge Machining
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