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Modeling of surface roughness and the role of debris in micro-EDM

DSpace at IIT Bombay

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Title Modeling of surface roughness and the role of debris in micro-EDM
 
Creator KIRAN, MPSK
JOSHI, SS
 
Subject material removal
machining process
discharge
micro-edm
surface roughness
single-spark
plasma
spark erosion
debris inclusion
 
Description Surface roughness is one of the important quality characteristic of a micromachined component. This paper presents a model to predict surface roughness of micro-EDmachined surfaces. The model is based on the configuration of a single-spark cavity formed as a function of process parameters. Assuming the normal distribution of surface heights, the mu and sigma (R-q) of the surface profile arc evaluated after every spark. The model was further extended to capture the role of debt-is in inicro-EDM in changing electric potential at the micropeaks on the cathode surfaces. The chemical kinetics approach was used to evaluate the change in plasma enthalpy and composition as a result of debris inclusion in the dielectric. The corresponding energy distribution between the electrodes was used to predict configuration of the single-spark cavity and the consequent surface roughness using the earlier surface roughness model. The modeling results were found to agree well with the inicro-EDM validation experiments performed without and with the inclusion of artificial debris (iron particles) in the dielectric.
 
Publisher ASME-AMER SOC MECHANICAL ENG
 
Date 2011-07-18T18:34:07Z
2011-12-26T12:50:46Z
2011-12-27T05:36:49Z
2011-07-18T18:34:07Z
2011-12-26T12:50:46Z
2011-12-27T05:36:49Z
2007
 
Type Article
 
Identifier JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME, 129(2), 265-273
1087-1357
http://dx.doi.org/10.1115/1.2540683
http://dspace.library.iitb.ac.in/xmlui/handle/10054/5018
http://hdl.handle.net/10054/5018
 
Language en