Effect of laser parameters on sequential laser beam micromachining and micro electro-discharge machining

Rashid, Mir Akmam Noor and Saleh, Tanveer and Noor, Wazed Ibne and Ali, Mohamed Sultan Mohamed (2021) Effect of laser parameters on sequential laser beam micromachining and micro electro-discharge machining. The International Journal of Advanced Manufacturing Technology, 114. pp. 709-723. ISSN 0268-3768

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Abstract

Laser beam micromachining (LBMM) and micro electro-discharge machining (μEDM) based sequential micromachining technique, LBMM-μEDM, has drawn significant research attention to utilize the advantages of both methods, i.e., LBMM and μEDM. In this process, a pilot hole is machined by the LBMM, and subsequently finishing operation of the hole is carried out by the μEDM. This paper presents an experimental investigation on the stainless steel (type SS304) to observe the effects of laser input parameters (namely, laser power, scanning speed, and pulse frequency) on the performance of the finishing technique, that is, the μEDM in this case. The scope of the work is limited to 1-D machining, i.e., drilling microholes. It was found that laser input parameters mainly scanning speed and power influenced the output performance of μEDM significantly. Our study suggests that if an increased scanning speed at a lower laser power is used for the pilot hole drilling by the LBMM process, it could result in significantly slower μEDM machining time. On the contrary, if the higher laser power is used with even the highest scanning speed for the pilot hole drilling, then μEDM processing time was faster than the previous case. Similarly, μEDM time was also quicker for LBMMed pilot holes machined at low laser power and slow scanning speed. Our study confirms that LBMM-μEDM-based sequential machining technique reduces the machining time, tool wear, and instability (in terms of short circuit count) by a margin of 2.5 x, 9 x, and 40 x, respectively, in contrast to the pure μEDM process without compromising the quality of the holes.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Sequential micromachining, Laser beam micromachining, Micro electro-discharge machining, LBMM, μEDM
Subjects:	T Technology > T Technology (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechatronics Engineering Kulliyyah of Engineering
Depositing User:	Dr. Tanveer Saleh CEng MIMechE
Date Deposited:	22 Apr 2021 08:48
Last Modified:	22 Jul 2021 14:57
URI:	http://irep.iium.edu.my/id/eprint/89388

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