An ultrasonic vibration device for micro electro-discharge machining /

Micro-machining technologies have enjoyed a recent resurgence due to massive demands in many engineering, production and manufacturing sectors. Micro Electric Discharge Machining (μ-EDM) is one of the most popular techniques available to produce microscopic features and components for various indust...

Full description

Saved in:
Bibliographic Details
Main Author: Mollik, Md Shohag (Author)
Format: Thesis Book
Language:English
Published: Kuala Lumpur : Kulliyyah of Engineering, International Islamic University Malaysia, 2022
Subjects:
Online Access:http://studentrepo.iium.edu.my/handle/123456789/11431
Tags: Add Tag
No Tags, Be the first to tag this record!
LEADER 04334nam a2200385 4500
008 230707s2022 my a f m 000 0 eng d
040 |a UIAM   |b eng   |e rda  
041 |a eng  
043 |a a-my--- 
100 1 |a Mollik, Md Shohag  |9 574731  |e author 
245 1 2 |a An ultrasonic vibration device for micro electro-discharge machining /  |c by Md Shohag Mollik 
264 1 |a Kuala Lumpur :  |b Kulliyyah of Engineering, International Islamic University Malaysia,  |c 2022 
300 |a xv, 90 leaves :  |b color illustrations ;   |c 30cm. 
336 |a text   |2 rdacontent 
337 |a unmediated   |2 rdamedia 
337 |a computer   |2 rdamedia 
338 |a volume   |2 rdacarrier 
338 |a online resource   |2 rdacarrier 
347 |a text file   |b PDF   |2 rdaft 
500 |a Abstracts in English and Arabic.  
500 |a "A dissertation submitted in fulfilment of the requirement for the degree of Master of Science (Mechatronics Engineering)." --On title page.  
502 |a Thesis (MSMCT)--International Islamic University Malaysia, 2022.  
504 |a Includes bibliographical references (leaves 80-87).  
520 |a Micro-machining technologies have enjoyed a recent resurgence due to massive demands in many engineering, production and manufacturing sectors. Micro Electric Discharge Machining (μ-EDM) is one of the most popular techniques available to produce microscopic features and components for various industries. Micro electro-discharge machining (μ-EDM) uses electro-thermal energy from repetitive sparks generated between the tool and workpiece to remove material from the latter. This technique can ensure better machining performance in terms of reduced Heat Affected Zones and surface finishing. It also comes with inherent disadvantages such as high machining time, low material removal rate (MRR) and unstable machining. One of the bottlenecks of μ-EDM is the phenomenon of short circuits due to the physical contact between the tool and debris (formed during the erosion of the workpiece). To overcome these factors, vigorous flushing of dielectric fluid is performed. Adequate flushing of the debris can be achieved by applying low amplitude high-frequency vibration to the workpiece. The vibration aids in carrying away the debris accumulated in the spark-gap region. In this research, a novel design of an ultrasonic vibration fixture has been proposed. This fixture will facilitate vibration of the workpiece that is required to improve machining performance. Further enhancement of the design leads to better machining performance. System Identification helps to determine the nature of the system and model the input-output response. The oscillation of the system can be easily characterized and validated using System Identification. This study, however, shows that the application of vibration does not yield beneficial results for the μ-EDM for all the parametric conditions. The results of this study suggest that vibration-assisted μ-EDM becomes less effective as the discharge energy is increased (primarily by increasing the capacitor value of the RC pulse generator). Similarly, the reduction of the occurrence of the short circuit was profound when the low discharge energy level with low voltage and low capacitor setting of the RC Pulse generator was used. The overall scale of the overcut with various discharge energy and μ-EDM speed varied from 1μm/s to 11μm/s for the conventional μ-EDM process. At a low capacitor value (10 pF), ultrasonic vibration reduces tool wear by ~31%. As a result of using the ultrasonic vibration device, the average increase in MRR of ~ 46% was achieved across all voltage levels. 
655 0 |9 64  |a Theses, IIUM local 
690 |9 19519  |a Dissertations, Academic  |x Department of Mechatronics Engineering  |z IIUM 
700 1 |a Tanveer Saleh  |e degree supervisor 
700 1 |a Muhammad Mahbubur Rashid  |e degree supervisor  |9 2176 
700 0 |a Khairul Affendy Md Nor  |e degree supervisor 
710 2 |9 169  |a International Islamic University Malaysia  |b Department of Mechatronics Engineering 
856 1 4 |u http://studentrepo.iium.edu.my/handle/123456789/11431 
900 |a sz to asbh 
942 |2 lcc  |n 0  |c THESIS 
999 |c 515894  |d 547311 
952 |0 0  |1 0  |2 lcc  |4 0  |7 5  |8 IIUMTHESIS  |9 1015362  |a IIUM  |b IIUM  |c THESIS  |d 2023-06-01  |e Mgift  |p 11100480344  |r 2023-06-01  |w 2023-06-01  |y THESIS