Effects of Machining Fluid on Electric Discharge Machining of SiC Ingot

2014 ◽  
Vol 778-780 ◽  
pp. 767-770 ◽  
Author(s):  
Norimasa Yamamoto ◽  
Satarou Yamaguchi ◽  
Tomohisa Kato
Keyword(s):  
Surface Roughness ◽  
Silicon Carbide ◽  
Ion Exchange ◽  
Electric Discharge ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Electric Discharge Machining ◽  
The Wire ◽  
Characteristic Features ◽  
First Time

Recently, ingots of silicon carbide have been adapted to be sliced by the wire-cut electrical discharge machining. Fast slicing, and the reduction in the loss are important for slicing of the wafer. In this paper, characteristic features of the electric discharge machining in the ion-exchange water and the fluorine-based fluid were compared for these improvement. The discharge was caused by a pulse voltage applied to a ingot of silicon carbide and the wire in machining fluid, and the slicing was proceeded. As a result, improvement of surface roughness and kerf loss was confirmed, for the first time. In addition, the improving methods for fast slicing were considered.

Electrode Material Effect on Electrical Discharge Machining PcBN Cutting Tool Processing

2011 ◽  
Vol 399-401 ◽  
pp. 1667-1671 ◽  
Author(s):  
Yun Hai Jia
Keyword(s):  
Surface Quality ◽  
Electric Discharge ◽  
Electrode Material ◽  
Electrical Discharge ◽  
Electrode Materials ◽  
Cutting Tool ◽  
Electrical Discharge Machining ◽  
Copper Electrode ◽  
Electric Discharge Machining ◽  
Tool Surface

The electrode material is playing the very important role in the electrical discharge machining. Two kinds of electrode materials common used in EDM are compared and analyses similarities and differences in structure and physical characteristics. Combined with PcBN tool machining tests, from the electric discharge machining efficiency, electrode wear, tool surface quality, tool surface degenerating layer, machining results are in analysis and comparison, and then different electrode materials machining technics in electrical discharge machining process are summarized. Through the cutting tool electric discharge machining experiments, we can know that the graphite electrode easy to take shape, suits in the complex edge's cutting tool electric discharge machining, under the same electric discharge machining parameter condition, its processing efficiency must be higher than the copper electrode, but the electrode loses, the cutting tool surface quality and affect layer thickness are to be worse than the copper electrode.

Spectroscopic Measurement of Electric Discharge Machining for Silicon Carbide

2009 ◽  
Vol 615-617 ◽  
pp. 609-612 ◽  
Author(s):  
Tatsunori Sugimoto ◽  
Toshiya Noro ◽  
Satarou Yamaguchi ◽  
Hideyoshi Majima ◽  
Tomohisa Kato
Keyword(s):  
Silicon Carbide ◽  
Electric Discharge ◽  
Light Emission ◽  
Cutting Speed ◽  
Electric Discharge Machining ◽  
Long Time ◽  
Total Light ◽  
Diamond Saw ◽  
The Wire ◽  
Discharge Gas

Diamond saw is generally used to make the silicon carbide (SiC) wafers from ingots, but it takes long time for cutting. We have used the electric discharge machining (EDM) to cut SiC. The cutting speed of EDM for SiC is almost 10 times faster than the diamond saw, and the surface roughness is 1/10 for the diamond saw. EDM cut SiC by the plasma produced between the wire and SiC material. The emissions from EDM plasma may involve much information for EDM cutting. We monitored the total light intensity by a photodiode, and observed the spectrum of the emission from EDM plasma by a visible spectroscopy. The discharge gas used helium and argon. In both discharges, the light emission was observed when the current was not zero. Also, many lines were observed Si I, Si II and C I from the SiC sample, and Cu I and Zn I from the wire. And, the electron temperature of EDM plasma was estimated to be under several eV because the observed lines were almost the emission from atoms. Also, the scars, which show the copper-alloy wire was hurt by discharge, were observed from the wire.

Analysis of wire erosion and workpiece surface roughness in wire electrical discharge machining

2003 ◽  
Vol 217 (5) ◽  
pp. 633-642 ◽  
Author(s):  
N Tosun ◽  
C Cogun
Keyword(s):  
Surface Roughness ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Open Circuit ◽  
Wire Electrical Discharge Machining ◽  
Machining Parameters ◽  
Workpiece Surface ◽  
The Wire ◽  
Dielectric Flushing ◽  
Wire Wear

In this study, the effects of machining parameters on the wire wear, on the size of erosion craters on the wire and on the workpiece surface roughness were investigated experimentally in wire electrical discharge machining (WEDM). An attempt was made to correlate the crater volume and the pulse energy. The experiments were conducted under different settings of pulse duration, open-circuit voltage, wire speed and dielectric flushing pressure. The variations of the wire wear, the size of erosion craters on the wire and the workpiece surface roughness with machining parameters were modelled mathematically by using regression analysis. The relationship between the workpiece surface roughness and the crater size was established. The analysis of variance (ANOVA) and F-test were performed to obtain statistically significant process parameters and the percentage contribution of these parameters to the performance outputs.

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

2020 ◽  
Vol 1157 ◽  
pp. 93-107
Author(s):  
Bogdan Ionuț Cristea ◽  
Daniel Ghiculescu ◽  
Dumitru Mnerie
Keyword(s):  
Experimental Data ◽  
Electric Discharge ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Comsol Multiphysics ◽  
Removal Mechanism ◽  
Electric Discharge Machining ◽  
Mechanical Influence

The paper reviews machining of CoCr alloys by electric discharge machining and ultrasonic aided discharge machining. The removal mechanism is discussed, modeled with Comsol Multiphysics and validated using experimental data.

scholarly journals ANALISIS OPTIMASI KETELITIAN DIMENSI, KEKASARAN PERMUKAAN DAN LAJU KEAUSAN ELEKTRODE PADA PROSES ELECTRIC DISCHARGE MACHINING DENGAN METODE TAGUCHI MULTI RESPON

2015 ◽  
Vol 7 (1) ◽  
Author(s):  
Edy Sulistiyawan
Keyword(s):  
Electric Discharge ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Electric Discharge Machining ◽  
Time Pulse

Electrical Discharge Machining (EDM) adalah mesin non konvensi-onal yang bekerja berdasarkan terjadinya loncatan bunga api secara periodik dari elektrode ke benda kerja. Pada penelitian ini variabel-variabel bebas yang diteliti merupakan faktor-faktor yang dapat dikendalikan pada setting mesin yaitu arus, on-time pulse, dan tegangan, serta masing-masing variabel mempunyai tiga taraf pengamatan. Percobaan utama dilaksanakan dengan menggunakan rancangan OA L27. Analisis data dilakukan dengan pendekatan konvensional Taguchi untuk optimasi respon satu per satu dan aplikasi prosedur TOPSIS untuk memperoleh suatu standart setting yang dapat mengoptimumkan ketiga respon secara sekaligus. Hasil penelitian diperoleh bahwa respon kekasaran permukaan, laju keausan elektrode dan ketelitian dimensi dipengaruhi oleh faktor-faktor utama yaitu arus, on-time pulse, dan tegangan serta interaksi dua faktor yai tu antara arus dan tegangan. Kombinasi taraf faktor yang menghasilkan ketiga respon yang optimum adalah setting mesin dengan arus 3A, on-time pulse 100 dan tegangan 70 volt. Sedangkan estimasi harga kekasaran permukaan optimum yang diperoleh adalah sebesar 1.24 , dan interval kepercayaan 90% diperoleh range antara 1.17 sampai 1.33 . Untuk respon laju keausan elektrode diperoleh estimasi harga yang optimum sebesar 0.0096 mm3/dtk, dan dengan interval kepercayaan 90% diperoleh range antara 0.0078 mm3/dtk sampai 0.0018 mm3/dtk. Dan untuk respon keteli tian dimensi diperoleh estimasi harga yang optimum sebesar 0.0354mm, dan interval estimasi harga yang optimum sebesar 0.0354mm, dan interval kepercayaan 90% diperoleh range antara 0.0325mm sampai 0.0387mm.

Optimization of Processing Conditions on the Wire Electric Discharge Machining by the Parameters of Vibro-Acoustic Signal

2016 ◽  
Vol 876 ◽  
pp. 36-42 ◽  
Author(s):  
Sergey Nikolaevich Grigoriev ◽  
Mikhail Pavlovich Kozochkin ◽  
Artur Nikolaevich Porvatov
Keyword(s):  
Electric Discharge ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Pulsed Laser ◽  
Acoustic Signals ◽  
Processing Conditions ◽  
Electric Discharge Machining ◽  
Spark Erosion ◽  
Wire Electric Discharge Machining

The results of the research of vibro-acoustic signals, accompanying the processes of electrical discharge machining and pulsed laser treatment, are presented in this article. It is shown that the monitoring parameters of vibro-acoustic signals can improve the quality of management spark erosion equipment.

Optimization Electro Discharge Machining of Ti-6Al-4V Alloy with Silicon Carbide Powder Mixed

2012 ◽  
Vol 566 ◽  
pp. 466-469 ◽  
Author(s):  
Mohsen Saboktakin Rizi ◽  
Gholam Reza Razavi ◽  
Mojtaba Ostadmohamadi ◽  
Ali Reza Havaie
Keyword(s):  
Thermal Conductivity ◽  
Silicon Carbide ◽  
Titanium Alloy ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Carbide Powder ◽  
Electric Discharge Machining ◽  
Electro Discharge Machining ◽  
Positive Effect ◽  
Silicon Carbide Powder

The Ti-6Al-4V alloy is the most important and widely used titanium alloy which enjoys the welding, forging and machining capabilities. However brittle at high temperatures and low thermal conductivity caused restrictions to deformation and machining of this alloy. So advanced methods machining such as Electrical discharge machining has been developed for titanium and its alloys. One of the ways to improve the performance of electrical discharge machining method is to add the powder to the dielectric. Depending on the type of powder used the different results are achieved. In this study the effect of silicon carbide powder on electrical discharge machining of titanium alloys has been studied. Results suggest that the addition of silicon carbide powder in an electric discharge machining method reduces the roughness and rate filings will be taken. The experimental results showed that the addition of silicon carbide powder will have a positive effect on reducing corrosion of the electrode.

The effect of the mating gear surface over the durability of injection-molded polypropylene spur gears

2016 ◽  
Vol 230 (12) ◽  
pp. 1401-1414 ◽  
Author(s):  
A Johnney Mertens ◽  
Prateek Kumar ◽  
S Senthilvelan
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Surface Temperature ◽  
Electric Discharge ◽  
Gear Tooth ◽  
Surface Condition ◽  
Tooth Surface ◽  
Electric Discharge Machining ◽  
Injection Molded ◽  
The Wire

Extensive investigations have been carried out to understand the effect of gear material, gear parameters and service conditions over polymer gear durability. However, the effect of the mating gear surface condition over test gear performance has not been completely understood. In this study, injection-molded polypropylene gears were paired with stainless steel gears and evaluated in the power absorption gear test rig. This study considered steel gears manufactured through the wire-cut electric discharge machining with different surface roughness (3.8–4.1 µm, 2.5–2.8 µm and 1.9–2.2 µm). The bearing ratio curves of the steel gear surfaces were obtained with the aid of non-contact profiler. During testing, the surface temperature of polymer gear increases due to the gear material hysteresis and surface interaction. The surface temperature of the gear increased by 5–15℃ due to the increase of surface roughness of the mating steel gear tooth (1.9–4.1 µm). The worn-out gear tooth surface also confirmed the significance of the mating gear surface condition. Further, stainless steel discs with different surface roughness (4.7–5.4 µm, 2.6–3.2 µm) were manufactured through the wire-cut electric discharge machining process. Injection-molded polypropylene pins were slid against these discs. Due to the increase in surface roughness, coefficient of friction was found to increase from 0.38 to 0.45 for the chosen test condition. The measured net surface temperature of the test specimen also increased from 52 to 59℃ due to the increase in surface roughness.

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