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LASER INDUCED PLASMA MICRO MACHINING
SEMINAR REPORT
Submitted in partial fulfillment of the requirements for the
award of the degree of
Bachelor of Technology
In
Mechanical Engineering
By
MOHAMMED ASHIQUE P S (B120292ME)
Department of Mechanical Engineering
NATIONAL INSTITUTE OF TECHNOLOGY CALICUT
JANUARY 2016
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CERTIFICATE
This is to certify that the report entitled “Laser Induced
Plasma Micromachining” is a bonafide
record of the Seminar done by MOHAMMED ASHIQUE P S ( Roll No .:
B120292ME) under my
supervision, in partial fulfillment of the requirements for the
award of the degree of Bachelor of
Technology in Mechanical Engineering from National Institute of
Technology Calicut, and this
work has not been submitted elsewhere for the award of a
degree.
Dr. M.L Joy
Professor
Dept of Mechanical Engineering
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ACKNOWLEDGEMENT
I am grateful to Dr. R. Ramachandran , Professor & Head of
the Department of Mechanical
Engineering, for providing me the best facilities and atmosphere
for the seminar completion and
presentation. I express my sincere gratitude to our seminar in
charge Dr. M.L Joy , Lecturer,
Department of Mechanical Engineering, for his valuable guidance
and help. I thank the faculty
of Mechanical engineering department, for their valuable
support. I thank god almighty for his
blessings in completing this work. Also I thank all the friends
and well-wishers for their healthy
criticism and valuable co-operation in all respect.
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CONTENTS
Page No.
1. Introduction
2. LIPMM
3. Experimental Setup
4. Machining Of Microchannels
5. Conclusions
6. References
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LIST OF TABLES AND FIGURES
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ABSTRACT
Surface micro texturing has found various applications in fields
of metal cutting, tribology, biomedical engineering etc. Many of
these applications are material specific and include materialslike
polymers & ceramics. Limitations in conventional processes like
μ-EDM and LASER ablationare requirement of conductive electrode and
work piece and complex process control mechanismsinvolved
respectively.
This paper introduces Laser induced plasma micromachining
(LIPMM) , a multimaterial tool-lessmicromachining process which
offers superior machining characteristics while
preservingresolution and accuracy. It uses an ultra-short tightly
focused laser irradiation to generate plasmathrough laser induced
dielectric breakdown. The plasma generated absorbs energy and
facilitatesmaterial removal through plasma matter interaction spot
through melting and vaporization. This
paper discuss the underlying principle of plasma generation
through laser induced dielectric breakdown and machining, and also
based on the underlying principles , to present a procedureand
experimental setup for plasma generation and machining . The main
benefits of the processare micromachining with low subsurface
damage, smaller HAZ and low roughness.
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2.
