Advanced Technologies and Materials

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Vol. 45 No. 1 (2020)
Original articles

An Experimental Analysis of Cutting Quality in Plasma Arc Machining

Marin Gostimirović
University of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia
Dragan Rodić
University of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia
Milenko Sekulić
University of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia
Andjelko Aleksić
University of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia

Published 2020-06-01

abstract views: 20 // Full text article (PDF): 12


Keywords

  • plasma arc cutting,
  • machining accuracy,
  • surface topography,
  • heat affected zone

How to Cite

Gostimirović, M., Rodić, D., Sekulić, M., & Aleksić, A. (2020). An Experimental Analysis of Cutting Quality in Plasma Arc Machining. Advanced Technologies and Materials, 45(1), 1–8. https://doi.org/10.24867/ATM-2020-1-001

Abstract

Plasma arc cutting (PAC) is an unconventional process widely used in manufacturing of heavy plate products. This work reports on the research results of machining quality of the workpiece in the plasma arc cutting on the low carbon low alloy steel. An experimental investigation of the characteristics of machining accuracy and surface integrity was carried out for basic machining parameters (cutting speed, arc current, arc voltage, plasma gas pressure, stand-off distance and nozzle diameter). The kerf geometry was determined with three accuracy parameters (top kerf width, bottom kerf width and kerf taper angle). The parameters of deviation present due to plasma curvature were defined by drag and pitch of drag line. The surface roughness was determined with two main roughness parameters through scanning the surface topography (roughness average and maximum height of the profile). The surface properties were determined over microstructure in heat affected zone (HAZ). The results show an acceptable machining quality of the PAC, so that this process is an excellent choice for fast and efficient material removal. However, the plasma arc cutting is not suitable for the final machining because of the metallurgical variations in the HAZ.

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