Electrical Discharge Machining of Beryllium Copper Alloys Using Graphite Electrode

Electrical Discharge Machining (EDM) is commonly used to produce molds and dies, to drill small, burr-free holes and to make prototype quantities of contacts for the aerospace and electronics markets. Most of EDM machines are manufactured and equipped with built-in ‘machining technology’ for steels....

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主要作者: Mohamed Yusof, Shaik Mohamed
格式: Thesis
语言:English
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出版: 2009
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spelling my-upm-ir.78452013-05-27T07:36:47Z Electrical Discharge Machining of Beryllium Copper Alloys Using Graphite Electrode 2009 Mohamed Yusof, Shaik Mohamed Electrical Discharge Machining (EDM) is commonly used to produce molds and dies, to drill small, burr-free holes and to make prototype quantities of contacts for the aerospace and electronics markets. Most of EDM machines are manufactured and equipped with built-in ‘machining technology’ for steels. Apart from steel, beryllium copper alloys are amongst essential material for mould and die making. Therefore, the present study elucidates the die-sinking EDM characteristics of beryllium copper alloys with graphite as an electrode. Experiments were conducted on EDM Die Sinking Charmilles Robofom 35P. The output responses investigated were Material Removal Rate (MRR) and Surface Roughness (Ra). Full factorial and Linear Regression analysis of Design of Experiment (DOE) module in Minitab was employed as a principal methodology to examine the effects of current, polarity, pulse duration and voltage over output responses. The significant and optimum machining parameters for each output responses was also identified and established. Experiment results indicate that the Material Removal Rate (MRR) was mainly affected by current, pulse duration, voltage and interaction between current*pulse duration. For the Surface Roughness (Ra), the significant factors were current, voltage and pulse duration. Confirmation tests were carried out and used to compare results obtained by theoretical predication with those experimentally. It was found that the error margin of factors influenced between the predicted and actual results is 5% for Material Removal Rate (MRR) and 4.2% for Surface Roughness (Ra). 2009 Thesis http://psasir.upm.edu.my/id/eprint/7845/ http://psasir.upm.edu.my/id/eprint/7845/1/ABS_%3D%3D%3D__FK_2009_97.pdf application/pdf en public masters Universiti Putra Malaysia Faculty of Engineering English
institution Universiti Putra Malaysia
collection PSAS Institutional Repository
language English
English
topic


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Mohamed Yusof, Shaik Mohamed
Electrical Discharge Machining of Beryllium Copper Alloys Using Graphite Electrode
description Electrical Discharge Machining (EDM) is commonly used to produce molds and dies, to drill small, burr-free holes and to make prototype quantities of contacts for the aerospace and electronics markets. Most of EDM machines are manufactured and equipped with built-in ‘machining technology’ for steels. Apart from steel, beryllium copper alloys are amongst essential material for mould and die making. Therefore, the present study elucidates the die-sinking EDM characteristics of beryllium copper alloys with graphite as an electrode. Experiments were conducted on EDM Die Sinking Charmilles Robofom 35P. The output responses investigated were Material Removal Rate (MRR) and Surface Roughness (Ra). Full factorial and Linear Regression analysis of Design of Experiment (DOE) module in Minitab was employed as a principal methodology to examine the effects of current, polarity, pulse duration and voltage over output responses. The significant and optimum machining parameters for each output responses was also identified and established. Experiment results indicate that the Material Removal Rate (MRR) was mainly affected by current, pulse duration, voltage and interaction between current*pulse duration. For the Surface Roughness (Ra), the significant factors were current, voltage and pulse duration. Confirmation tests were carried out and used to compare results obtained by theoretical predication with those experimentally. It was found that the error margin of factors influenced between the predicted and actual results is 5% for Material Removal Rate (MRR) and 4.2% for Surface Roughness (Ra).
format Thesis
qualification_level Master's degree
author Mohamed Yusof, Shaik Mohamed
author_facet Mohamed Yusof, Shaik Mohamed
author_sort Mohamed Yusof, Shaik Mohamed
title Electrical Discharge Machining of Beryllium Copper Alloys Using Graphite Electrode
title_short Electrical Discharge Machining of Beryllium Copper Alloys Using Graphite Electrode
title_full Electrical Discharge Machining of Beryllium Copper Alloys Using Graphite Electrode
title_fullStr Electrical Discharge Machining of Beryllium Copper Alloys Using Graphite Electrode
title_full_unstemmed Electrical Discharge Machining of Beryllium Copper Alloys Using Graphite Electrode
title_sort electrical discharge machining of beryllium copper alloys using graphite electrode
granting_institution Universiti Putra Malaysia
granting_department Faculty of Engineering
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/7845/1/ABS_%3D%3D%3D__FK_2009_97.pdf
_version_ 1747810718308106240