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Das, Arjita
- Fibre Bragg Grating Sensors for Measuring Spark Gap in Micro-EDM in Real-Time
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Authors
Affiliations
1 CSIR-Central Mechanical Engineering Research Institute, Durgapur, IN
2 Central Manufacturing Technology Institute, Tumkur Road, Bengaluru, IN
1 CSIR-Central Mechanical Engineering Research Institute, Durgapur, IN
2 Central Manufacturing Technology Institute, Tumkur Road, Bengaluru, IN
Source
Manufacturing Technology Today, Vol 18, No 7 (2019), Pagination: 3-8Abstract
In the phase of Industry 4.0 (I.4) technology, miniaturization has paved the foundation of the smart manufacturing sector and the micromachining processes can be considered as the front end of the I.4 technologies. Micro-Electric Discharge Machining (Micro-EDM) has been considered the most promising micromachining technology for fabrication of microfeatures irrespective to hard and temperature resistive materials. The process characteristics in Micro-EDM is very stochastic in nature, and understanding the proper process characteristics with digitization of data to predict the process for improved capabilities is highly required in this era of Industry 4.0 revolution. The spark discharge between the anode and cathode is envisaged to be very small gap (~10μm) and also an essential parameter for machining performance, but measurement of spark gap of Micro-EDM in realtime is a great challenge. This present work is based on measurement of spark gap with a novel sensing technique based on Fiber Bragg Grating (FBG).Keywords
Micro-EDM, Spark Gap Measurement, FBG Sensor.
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- Study on Material Removal Rate and Surface Roughness using Graphene as Dielectric Additives in Micro-Electric Discharge Machining
Abstract Views :99 |
PDF Views:0
Authors
Affiliations
1 CSIR-Central Mechanical Engineering Research Institute, Durgapur, West Bengal, IN
2 Central Manufacturing Technology Institute, Tumkur Road, Bangalore, Karnataka, IN
1 CSIR-Central Mechanical Engineering Research Institute, Durgapur, West Bengal, IN
2 Central Manufacturing Technology Institute, Tumkur Road, Bangalore, Karnataka, IN
Source
Manufacturing Technology Today, Vol 20, No 11-12 (2021), Pagination: 3-9Abstract
Micro-electric discharge machining is the most distinguished micro-manufacturing process for engineering micro-parts of different geometric features. The slow material removal rate owing to the low energy short-pulsed electric discharge is the major bottleneck of the process in batch scale production. This paper is an attempt to increase the material removal rate (MRR) and enhance the surface integrity in micro-EDM using graphene as an additive in dielectric liquid. Graphene sheets synthesized using Hummers method followed by reduction and subsequent heating was dispersed in hydrocarbon based dielectric liquid by ultrasonication at temperature near to the flash point. The INCONEL 718 workpiece electrode has been immersed in the graphene suspended dielectric medium where as tungsten carbide of diameter 200µm has been used as tool electrode. It has been found that the MRR increases by 47 % in terms of volume of material removed and the surface roughness reduces by 73 % for graphene additive based dielectric medium as compared with dielectric without additive.Keywords
Micro-EDM, MRR, Surface Roughness, Graphene, Dielectric Medium.References
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