Micro electro discharge machining of nonconductive ceramic

The micro-electro discharge machining (micro-EDM) models established for single spark erosion are not applicable for nonconductive ceramics because of random spalling. Moreover, it is difficult to create single spark on a nonconductive ceramic workpiece when the spark is initiated by the assisting e...

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Main Authors:	Ali, Mohammad Yeakub, Sabur, Abdus, Banu, Asfana, Maleque, Md. Abdul, Adesta, Erry Yulian Triblas
Format:	Article
Language:	English
Published:	Deer Hill Publishing 2018
Subjects:	T Technology (General) TJ Mechanical engineering and machinery TS Manufactures
Online Access:	http://irep.iium.edu.my/64017/ http://irep.iium.edu.my/64017/ http://irep.iium.edu.my/64017/ http://irep.iium.edu.my/64017/1/Micro_Electro_Discharge_Machining_for_Nonconductiv.pdf

id	iium-64017
recordtype	eprints
spelling	iium-640172018-06-06T07:23:34Z http://irep.iium.edu.my/64017/ Micro electro discharge machining of nonconductive ceramic Ali, Mohammad Yeakub Sabur, Abdus Banu, Asfana Maleque, Md. Abdul Adesta, Erry Yulian Triblas T Technology (General) TJ Mechanical engineering and machinery TS Manufactures The micro-electro discharge machining (micro-EDM) models established for single spark erosion are not applicable for nonconductive ceramics because of random spalling. Moreover, it is difficult to create single spark on a nonconductive ceramic workpiece when the spark is initiated by the assisting electrode. In this paper, process development for nonconductive zirconium oxide (ZrO2) is discussed. It is shown that the charging and discharging duration depend on the capacitance and resistances of the circuit. The number of sparks per unit time is estimated from the single spark duration derived from heat transfer fundamentals. The model showed that both the capacitance and voltage are significant process parameters for material removal rate (MRR). However, capacitance was found to be the dominating parameter over voltage. As in case of higher capacitances, the creation of a conductive carbonic layer on the machined surface was not stable; the effective window of machining 101 - 103 pF capacitance and 80 - 100 V gap voltage or 10 - 470 pF capacitance and 80 - 110 V gap voltage. This fact was confirmed EDX analysis where the presence of high carbon content was evident. Conversely, the spark was found to be inconsistent using parameters beyond these ranges and consequently insignificant MRR. Nevertheless, the effective numbers of sparks per second were close to the predicted numbers when machining conductive copper material. In addition, higher percentage of ineffective pulses was observed during the machining which eventually reduced the MRR. In case of validation, average deviations between the predicted and experimental values were found to be around 10%. Deer Hill Publishing 2018-03-30 Article PeerReviewed application/pdf en http://irep.iium.edu.my/64017/1/Micro_Electro_Discharge_Machining_for_Nonconductiv.pdf Ali, Mohammad Yeakub and Sabur, Abdus and Banu, Asfana and Maleque, Md. Abdul and Adesta, Erry Yulian Triblas (2018) Micro electro discharge machining of nonconductive ceramic. International Journal of Engineering Materials and Manufacture, 3 (1). pp. 65-72. https://www.deerhillpublishing.com/index.php/ijemm/article/view/49 10.26776/ijemm.03.01.2018.07
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	T Technology (General) TJ Mechanical engineering and machinery TS Manufactures
spellingShingle	T Technology (General) TJ Mechanical engineering and machinery TS Manufactures Ali, Mohammad Yeakub Sabur, Abdus Banu, Asfana Maleque, Md. Abdul Adesta, Erry Yulian Triblas Micro electro discharge machining of nonconductive ceramic
description	The micro-electro discharge machining (micro-EDM) models established for single spark erosion are not applicable for nonconductive ceramics because of random spalling. Moreover, it is difficult to create single spark on a nonconductive ceramic workpiece when the spark is initiated by the assisting electrode. In this paper, process development for nonconductive zirconium oxide (ZrO2) is discussed. It is shown that the charging and discharging duration depend on the capacitance and resistances of the circuit. The number of sparks per unit time is estimated from the single spark duration derived from heat transfer fundamentals. The model showed that both the capacitance and voltage are significant process parameters for material removal rate (MRR). However, capacitance was found to be the dominating parameter over voltage. As in case of higher capacitances, the creation of a conductive carbonic layer on the machined surface was not stable; the effective window of machining 101 - 103 pF capacitance and 80 - 100 V gap voltage or 10 - 470 pF capacitance and 80 - 110 V gap voltage. This fact was confirmed EDX analysis where the presence of high carbon content was evident. Conversely, the spark was found to be inconsistent using parameters beyond these ranges and consequently insignificant MRR. Nevertheless, the effective numbers of sparks per second were close to the predicted numbers when machining conductive copper material. In addition, higher percentage of ineffective pulses was observed during the machining which eventually reduced the MRR. In case of validation, average deviations between the predicted and experimental values were found to be around 10%.
format	Article
author	Ali, Mohammad Yeakub Sabur, Abdus Banu, Asfana Maleque, Md. Abdul Adesta, Erry Yulian Triblas
author_facet	Ali, Mohammad Yeakub Sabur, Abdus Banu, Asfana Maleque, Md. Abdul Adesta, Erry Yulian Triblas
author_sort	Ali, Mohammad Yeakub
title	Micro electro discharge machining of nonconductive ceramic
title_short	Micro electro discharge machining of nonconductive ceramic
title_full	Micro electro discharge machining of nonconductive ceramic
title_fullStr	Micro electro discharge machining of nonconductive ceramic
title_full_unstemmed	Micro electro discharge machining of nonconductive ceramic
title_sort	micro electro discharge machining of nonconductive ceramic
publisher	Deer Hill Publishing
publishDate	2018
url	http://irep.iium.edu.my/64017/ http://irep.iium.edu.my/64017/ http://irep.iium.edu.my/64017/ http://irep.iium.edu.my/64017/1/Micro_Electro_Discharge_Machining_for_Nonconductiv.pdf
first_indexed	2018-09-07T08:16:24Z
last_indexed	2018-09-07T08:16:24Z
_version_	1610935891397705728

Micro electro discharge machining of nonconductive ceramic

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