Fabrication of CuW electrode for producing micro-hold on Wc-Co using EDM process

Micro-machining is one of the fundamental technologies for manufacturing miniaturized parts and products with size of between 1 to 999 µm. A micro-mold cavity is required for the mass production of micro component using injection molding machine. Moreover, micro-holes are also required in a micro-di...

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Main Author:	Hourmand, Mehdi
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/48205/1/MehdiHourmandMFKM2013.pdf
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spelling	my-utm-ep.482052017-09-13T06:59:58Z Fabrication of CuW electrode for producing micro-hold on Wc-Co using EDM process 2013 Hourmand, Mehdi TJ Mechanical engineering and machinery Micro-machining is one of the fundamental technologies for manufacturing miniaturized parts and products with size of between 1 to 999 µm. A micro-mold cavity is required for the mass production of micro component using injection molding machine. Moreover, micro-holes are also required in a micro-die. Nowadays, WC and its composite (WC-Co) are the widely used material in the making of cutting tools, dies and other special tools and components. Therefore, machining of WC is an important activity in manufacturing. Micro-EDM is one of the most effective methods for machining WC. Unfortunately there is limited information available about fabricating micro-hole electrode made from CuW for electrical discharge machining. This includes information on suitable electrode material for electrical discharge machining of CuW, the processing method and suitable parameter for micro-EDM of CuW and WC-Co. In this research, PGM WHITE 3 is used as the dielectric fluid, Cu-W as the micro-electrode, WC-Co as the workpiece material and Sodik AG40L as the die-sinking machine selected for the project. Process parameters investigated are polarity and voltage while the effects investigated are time of machining, end wear and diameter of hole. An electrode with a diameter of 372.76 µm has been successfully fabricated using selected process. Results of the experiment show that Micro-electrode with negative polarity has lower end wear of tool than positive polarity. Negative polarity of micro-electrode is used for micro-EDM of hole and positive polarity of micro-electrode is used for facing of micro-electrode. Lowest end wear of electrode has been achieved at P of CuW (-), IP (0.4 A), ton (1 µs), Df (0.5), Sr (20 rpm), Eg (50). Lowest hole diameter has been achieved at P of CuW (+), IP (0.4 A), ton (1 µs), Df (0.5), Sr (20 rpm), Eg (70). The shortest time of machining is achieved at P of CuW (-), IP (0.4 A), ton (1 µs), Df (0.5), Sr (20 rpm) Eg (70) when investigating 50, 70 and 90V 2013 Thesis http://eprints.utm.my/id/eprint/48205/ http://eprints.utm.my/id/eprint/48205/1/MehdiHourmandMFKM2013.pdf application/pdf en public http://libraryopac.utm.my/client/en_AU/main/search/results?qu=Fabrication+of+CuW+electrode+for+producing+micro-hold+on+Wc-Co+using+EDM+process&te= masters Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Hourmand, Mehdi Fabrication of CuW electrode for producing micro-hold on Wc-Co using EDM process
description	Micro-machining is one of the fundamental technologies for manufacturing miniaturized parts and products with size of between 1 to 999 µm. A micro-mold cavity is required for the mass production of micro component using injection molding machine. Moreover, micro-holes are also required in a micro-die. Nowadays, WC and its composite (WC-Co) are the widely used material in the making of cutting tools, dies and other special tools and components. Therefore, machining of WC is an important activity in manufacturing. Micro-EDM is one of the most effective methods for machining WC. Unfortunately there is limited information available about fabricating micro-hole electrode made from CuW for electrical discharge machining. This includes information on suitable electrode material for electrical discharge machining of CuW, the processing method and suitable parameter for micro-EDM of CuW and WC-Co. In this research, PGM WHITE 3 is used as the dielectric fluid, Cu-W as the micro-electrode, WC-Co as the workpiece material and Sodik AG40L as the die-sinking machine selected for the project. Process parameters investigated are polarity and voltage while the effects investigated are time of machining, end wear and diameter of hole. An electrode with a diameter of 372.76 µm has been successfully fabricated using selected process. Results of the experiment show that Micro-electrode with negative polarity has lower end wear of tool than positive polarity. Negative polarity of micro-electrode is used for micro-EDM of hole and positive polarity of micro-electrode is used for facing of micro-electrode. Lowest end wear of electrode has been achieved at P of CuW (-), IP (0.4 A), ton (1 µs), Df (0.5), Sr (20 rpm), Eg (50). Lowest hole diameter has been achieved at P of CuW (+), IP (0.4 A), ton (1 µs), Df (0.5), Sr (20 rpm), Eg (70). The shortest time of machining is achieved at P of CuW (-), IP (0.4 A), ton (1 µs), Df (0.5), Sr (20 rpm) Eg (70) when investigating 50, 70 and 90V
format	Thesis
qualification_level	Master's degree
author	Hourmand, Mehdi
author_facet	Hourmand, Mehdi
author_sort	Hourmand, Mehdi
title	Fabrication of CuW electrode for producing micro-hold on Wc-Co using EDM process
title_short	Fabrication of CuW electrode for producing micro-hold on Wc-Co using EDM process
title_full	Fabrication of CuW electrode for producing micro-hold on Wc-Co using EDM process
title_fullStr	Fabrication of CuW electrode for producing micro-hold on Wc-Co using EDM process
title_full_unstemmed	Fabrication of CuW electrode for producing micro-hold on Wc-Co using EDM process
title_sort	fabrication of cuw electrode for producing micro-hold on wc-co using edm process
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2013
url	http://eprints.utm.my/id/eprint/48205/1/MehdiHourmandMFKM2013.pdf
_version_	1747817333365145600

Fabrication of CuW electrode for producing micro-hold on Wc-Co using EDM process

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