Effect of laser parameters on sequential laser beam micromachining and micro electro-discharge machining
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 su...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Springer Nature
2021
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/89388/1/Published%20Version_compressed.pdf http://irep.iium.edu.my/89388/7/89388_Effect%20of%20laser%20parameters%20on%20sequential%20laser%20beam%20micromachining_Scopus.pdf http://irep.iium.edu.my/89388/ https://link.springer.com/article/10.1007/s00170-021-06908-8 |
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| Summary: | 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. |
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