Fundamental research with respect to thermal phenomena of micro EDM

Material removal in electrical discharge machining, EDM is by thermal erosion. Therefore, information on thermal phenomena of the process is required for further analyses of the process. Currently, demands on micro components increase the applications of EDM for micro machining significantly. Thi...

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Main Author:	Mohd Zahiruddin, Md. Zain
Format:	Thesis
Language:	English
Subjects:	Thermal phenomena Material removal EDM Electrical discharge machining (EDM) Micro EDM
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44264/1/p.1-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44264/2/full%20text.pdf
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spelling	my-unimap-442642016-12-01T01:17:56Z Fundamental research with respect to thermal phenomena of micro EDM Mohd Zahiruddin, Md. Zain Material removal in electrical discharge machining, EDM is by thermal erosion. Therefore, information on thermal phenomena of the process is required for further analyses of the process. Currently, demands on micro components increase the applications of EDM for micro machining significantly. This leads to the development of EDM with comparatively lower discharge energy than that of conventional EDM. In this work, for convenience the conventional and newly developed EDM is called macro and micro EDM, respectively. Although there is no difference in principle and mechanism of material removal between both processes, the micro EDM is capable of producing micro components with higher accuracy beyond the capability of macro EDM. However, unlike macro EDM, researches on the micro EDM thermal phenomena are limited due to the small spatiotemporal scale of the process, which makes both observation and analysis of the gap phenomena significantly difficult. Therefore, in this work thermal phenomena of micro EDM were obtained including energy distribution ratios, plasma diameter, power density and removal mechanism. These parameters were compared with those of macro EDM, and their influence on micro and macro EDM efficiencies were discussed. In this work, the efficiencies are represented by ratio of removal with respect to molten area volume or removal efficiency, Re and ratio of energy consumed for material removal with respect to energy distributed into workpiece or energy efficiency, Ee. Both Re and Ee of micro EDM were greater than those of macro EDM because the power density at micro EDM workpiece was found significantly higher than that of macro EDM. These results also explain differences in their performances such as the formation of white layer and residual stress. At the end of this work, to show the importance of the obtained results, an example application that describes deformation of micro fin machined by micro EDM due to thermal stress was discusse Universiti Malaysia Perlis (UniMAP) 2014 Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/44264 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44264/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44264/1/p.1-24.pdf c9d7c820bed63e42462fffb62f56c418 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44264/2/full%20text.pdf 2496e2f64c4b5c85047af9182ce0bc84 Thermal phenomena Material removal EDM Electrical discharge machining (EDM) Micro EDM School of Manufacturing Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
topic	Thermal phenomena Material removal EDM Electrical discharge machining (EDM) Micro EDM
spellingShingle	Thermal phenomena Material removal EDM Electrical discharge machining (EDM) Micro EDM Mohd Zahiruddin, Md. Zain Fundamental research with respect to thermal phenomena of micro EDM
description	Material removal in electrical discharge machining, EDM is by thermal erosion. Therefore, information on thermal phenomena of the process is required for further analyses of the process. Currently, demands on micro components increase the applications of EDM for micro machining significantly. This leads to the development of EDM with comparatively lower discharge energy than that of conventional EDM. In this work, for convenience the conventional and newly developed EDM is called macro and micro EDM, respectively. Although there is no difference in principle and mechanism of material removal between both processes, the micro EDM is capable of producing micro components with higher accuracy beyond the capability of macro EDM. However, unlike macro EDM, researches on the micro EDM thermal phenomena are limited due to the small spatiotemporal scale of the process, which makes both observation and analysis of the gap phenomena significantly difficult. Therefore, in this work thermal phenomena of micro EDM were obtained including energy distribution ratios, plasma diameter, power density and removal mechanism. These parameters were compared with those of macro EDM, and their influence on micro and macro EDM efficiencies were discussed. In this work, the efficiencies are represented by ratio of removal with respect to molten area volume or removal efficiency, Re and ratio of energy consumed for material removal with respect to energy distributed into workpiece or energy efficiency, Ee. Both Re and Ee of micro EDM were greater than those of macro EDM because the power density at micro EDM workpiece was found significantly higher than that of macro EDM. These results also explain differences in their performances such as the formation of white layer and residual stress. At the end of this work, to show the importance of the obtained results, an example application that describes deformation of micro fin machined by micro EDM due to thermal stress was discusse
format	Thesis
author	Mohd Zahiruddin, Md. Zain
author_facet	Mohd Zahiruddin, Md. Zain
author_sort	Mohd Zahiruddin, Md. Zain
title	Fundamental research with respect to thermal phenomena of micro EDM
title_short	Fundamental research with respect to thermal phenomena of micro EDM
title_full	Fundamental research with respect to thermal phenomena of micro EDM
title_fullStr	Fundamental research with respect to thermal phenomena of micro EDM
title_full_unstemmed	Fundamental research with respect to thermal phenomena of micro EDM
title_sort	fundamental research with respect to thermal phenomena of micro edm
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Manufacturing Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44264/1/p.1-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44264/2/full%20text.pdf
_version_	1747836831183929344

Fundamental research with respect to thermal phenomena of micro EDM

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