Indian Journal of Science and Technology

Abstract

Background/Objectives: Emissions of toxic substances are the major occupational and environmental problem associated with Electric Discharge Machining (EDM) process which is the highly extensively utilized nontraditional production process whereas these emissions could lead to unfavorable health issues to the operators and possess the straight forward impact towards the environment. Emissions of aerosols and gases are influenced by the temperature in the spark location which is a function of process parameters. This work aims at the characterization of hydrocarbons generated from the EDM process, in which kerosene is used as dielectric, for varying process parameters. Methods/Statistical Analysis: The experiment was designed using Taguchi L9 orthogonal array to study the influence of parameters of process on exposure. Die electrical level, Peak current Pulse Duration and flushing pressure were the parameters of process taken into account in this research. Findings: The breathing zone concentrations of emissions were sampled for gases and aerosols and these samples are analyzed for hydrocarbons using gas chromatography mass spectrometry analysis. The analysis results are compared with the exposure limit values or threshold limit values specified by the standard agencies and appropriate control measures were suggested.

Keywords: Aerosols and Gases, Characterization, Electric Discharge Machining, Emissions, Threshold Limit Valued