scholarly journals Effect of micro MoS2 powder mixed dielectric fluid on surface quality and material removal rate in micro-EDM processes

2009 ◽  
Vol 34 (2) ◽  
pp. 329-332 ◽  
Author(s):  
Gunawan Setia Prihandana ◽  
Muslim Mahardika ◽  
M. Hamdi ◽  
Kimiyuki Mitsui
Keyword(s):  
Surface Quality ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Dielectric Fluid ◽  
Micro Edm

Study on the Effect of Nano and Micro MoS2 Powder in Micro-Electrical Discharge Machining

2011 ◽  
Vol 264-265 ◽  
pp. 1450-1455 ◽  
Author(s):  
Gunawan Setia Prihandana ◽  
Tutik Sriani ◽  
Kei Prihandana ◽  
Yuta Prihandana ◽  
Muslim Mahardika ◽  
...  
Keyword(s):  
Surface Quality ◽  
Material Removal Rate ◽  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Micro Edm ◽  
Micro Electrical Discharge Machining ◽  
Powder Suspension ◽  
Size Powder

The application of powder mixed dielectric to improve the efficiency of electrical discharge machining (EDM) has been acknowledged extensively. However, the study of micro-size powder suspension in micro-EDM field is still limited. In this research, nano and micro size powder of MoS2 were used as catalyst agent. Powder suspension in different size was able to provide significant improvement in material removal rate and surface quality to increase the efficiency in μ- EDM processes.

Powder Mixed Micro Electro Discharge Milling of Titanium Alloy: Investigation of Material Removal Rate

2011 ◽  
Vol 383-390 ◽  
pp. 1759-1763 ◽  
Author(s):  
Mohammad Yeakub Ali ◽  
Nur Atiqah Binti Abdul Rahman ◽  
Erniyati Binti Mohamad Aris
Keyword(s):  
Titanium Alloy ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Dielectric Fluid ◽  
Optimum Level ◽  
Machining Parameters ◽  
Micro Edm ◽  
Discharge Energy ◽  
Powder Concentration

This paper presents effects of silicon carbide (SiC) powder in dielectric fluid of micro EDM on material removal rate (MRR). The aim is to identify the optimum level of SiC powder concentration and other micro EDM parameter for higher MRR. The work material was titanium alloy (Ti-6Al-4V) machined with tungsten carbide (WC) electrode by varying two machining parameters SiC powder concentrations and discharge energy. By using two factor four level factorial design of experiment, sixteen experiments were conducted. Data were analyzed by Design Expert® software. In this experimental investigation, maximum MRR of 7.3 µg/min was obtained for 24.75 g/l SiC powder concentration and 56.77 µJ discharge energy. The analysis of variance revealed that the SiC powder concentration in dielectric fluid on micro EDM has significant influence on MRR Ti-6Al-4V titanium alloy.

scholarly journals Micromachining in Powder-Mixed Micro Electrical Discharge Machining

2020 ◽  
Vol 10 (11) ◽  
pp. 3795 ◽  
Author(s):  
Gunawan Setia Prihandana ◽  
Muslim Mahardika ◽  
Tutik Sriani
Keyword(s):  
Surface Quality ◽  
Material Removal Rate ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Machining Process ◽  
Dielectric Fluid ◽  
Good Surface ◽  
Micro Electrical Discharge Machining ◽  
Powder Characteristics

Micromachining in the micro-electric discharge machining (μ-EDM) process requires high material-removal rate with good surface quality. Power-mixed μ-EDM, a modified machining process by introducing specific powder into the dielectric fluid, is among the key inventions to achieving these requirements. This article presents a review of the implementation of powder-mixed micro-EDM processes for microfabrication. Special attention was given to the influence of the powder characteristics, such as the concentration, electrical conductivity, shape and size of the powder. Subsequently, when describing the use of powder for obtaining a high material-removal rate and surface quality, other major applications in μ-EDM for surface modification and geometrical accuracy were also discussed. Finally, some of the varied methods that are used in powder-mixed μ-EDM and industrialization challenges are extensively elaborated.

Experimental Investigations into the Effect of Process Parameters and Nano-Powder (Fe2O3) on Material Removal Rate during Micro-EDM of Co-Cr-Mo

2017 ◽  
Vol 740 ◽  
pp. 125-132 ◽  
Author(s):  
Nagwa Mejid Elsiti ◽  
M.Y. Noordin
Keyword(s):  
Material Removal Rate ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Machining Process ◽  
Experimental Investigations ◽  
Dielectric Fluid ◽  
Micro Edm ◽  
Cobalt Chromium ◽  
Cobalt Chromium Molybdenum

Cobalt-base alloys are normally applied to materials that require wear, corrosion, and heat resistance. Today, the alloy of cobalt–chromium–molybdenum (Co–Cr–Mo) is employed in aerospace and medical fields. Through the thermal erosion process of Electrical Discharge Machining (EDM), an electrically-produced spark vaporizes materials that are electrically conductive. This paper examines the viability of improvement of material removal rate in the micro-electric discharge machining of cobalt chromium molybdenum (Co-Cr-Mo) using Fe2O3 nanopowder-mixed dielectric fluid. For the purpose of this research, a copper electrode with 300μm diameter and positive polarity was utilized. The performance measures of the machining process were investigated regarding the material removal rate (MRR). For analysis of EDM of the CoCrMo, response surface methodology (RSM) was employed. Two concentrations of nanopowder were added to dielectric (2g/land 4g/l). Findings showed that if Iron oxide nanopowders (Fe2O3) exists in the dielectric, MRRcan be significantly improved. Amongst the two concentrations of powder-mixed micro-EDM, 2 g/l of nanopowder provided higher MRR in comparison with 4g/l and without powder cases.

scholarly journals Assessment of CVD- and PVD-Coated Carbides and PVD-Coated Cermet Inserts in the Optimization of Surface Roughness in Turning of AISI 1045 Steel

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5231
Author(s):  
Evandro Paese ◽  
Martin Geier ◽  
Fabiano R. Rodrigues ◽  
Tadeusz Mikolajczyk ◽  
Mozammel Mia
Keyword(s):  
Surface Quality ◽  
Material Removal Rate ◽  
Vapor Deposition ◽  
Material Removal ◽  
Removal Rate ◽  
Controllable Factors ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel ◽  
Coated Carbide

In this study, an experimental and statistic investigation approach based on analysis of variance (ANOVA) and response surface methodology (RSM) techniques was performed to find the significant main effects and two-factor interaction effects and to determine how the controllable factors such as cutting speed, feed rate, depth of cut (DOC), tool nose radius, substrate and coating method of cutting tools influence surface quality in turning of AISI 1045 steel. The first optimal or near-optimal conditions for the quality of the generated surface and the second ones, including maximum material removal rate, were established using the proposed regression equations. The group mean roughness of the turned workpieces was lower from using chemical vapor deposition (CVD)-coated carbide inserts than the group means of other types of inserts; however they could not achieve the specific lowest roughness. The physical vapor deposition (PVD)-coated carbide and cermet inserts achieved the best surface quality when the specific combinations within the range interval of controllable factors were used in the experiment, showing that they may be applied to finish turning processes or even to particular high material removal rate conditions associated with the lowest roughness.

Chip-Ejection Mechanism and Experimental Study of Water Dispersant Dielectric Fluid on Small-Hole EDM

2010 ◽  
Vol 97-101 ◽  
pp. 4111-4115 ◽  
Author(s):  
Ming Rang Cao ◽  
Sheng Qiang Yang ◽  
Wen Hui Li ◽  
Shi Chun Yang
Keyword(s):  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Tap Water ◽  
Dielectric Liquid ◽  
Small Hole ◽  
Dielectric Fluid ◽  
Tool Electrode ◽  
Machining Quality ◽  
Hole Machining

The small hole EDM is one main method of micro holes machining and applied very widely. But it’s machining efficiency is low and machining stability is bad, which is more obvious because of chip-ejection difficulty when the ratio of length to diameter is rather large. Secondary discharge caused by chip-ejection difficulty not only makes the material removal rate reduce, but also causes geometric tolerance and affects product performance. Based on dispersion mechanism study of the water dispersant, the influence of the water dispersant is analyzed to chip-ejection, material removal rate and machining quality of the high-speed small-hole EDM. By contrasting the machining effect on using tap water with disperser dielectric liquid during electric spark small hole machining, adding the certain proportion disperser in water-based dielectric liquid may increase the material removal rate, decrease the tool wear rate, improve the effective impulse numbers, obviously reduce the second discharge number, and the taper of tool electrode and hole becomes small, so the hole machining quality enhances.

Experimental Research on Ultrasonic Assisted Pulse Electrochemical Compound Finishing for Hard and Brittle Metal

2010 ◽  
Vol 42 ◽  
pp. 170-174
Author(s):  
Cheng Guang Zhang ◽  
Xue Ling Yang ◽  
Bo Zhao
Keyword(s):  
Particle Size ◽  
Surface Quality ◽  
Experimental Research ◽  
Material Removal Rate ◽  
Vibration Amplitude ◽  
Material Removal ◽  
Removal Rate ◽  
Machining Accuracy ◽  
Ultrasonic Assisted ◽  
Metal Materials

The experiment of ultrasonic assisted pulse electrochemical compound finishing is carried in this paper. The machining principle of the compound finishing is discussed in this paper. Processing experiments of compound finishing are carried out to study the effects of the main processing para- meters, including the particle size, the ultrasonic vibration amplitude, the minimum gap between the tool head and workpiece and the pulse voltage, on the material removal rate and the surface quality for hard and brittle metal materials. The curves of the corresponding relationships are also obtained. The study indicates that the processing velocity, machining accuracy and surface quality can be improved under the compound finishing, obtaining the processing technology conductions of the compound finishing. Introductions

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