ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 11 December 2012
Page Count: 12

Effect of Working Parameters on Excavation Rate and Specific Energy on Surface Treatment With Pure Water Jet

Ozcelik, Yilmaz
Associate Professor, Dept. of Mining Engineering, Hacettepe Univ., Ankara,

Ciccu, Raimondo
Professor, Dept. of Geoengineering and Environmental Technologies, Univ. of Cagliari, Cagliari,

Bortolussi, Augusto
Institute of Environmental Geology and Geoengineering of C.N.R., Cagliari,

(Received 13 December 2011; accepted 21 May 2012)

Abstract

The purpose of this study is to investigate the effect of different operational variables such as traverse velocity, standoff distance, and pump pressure on the material removal rate (excavation rate) and specific energy in the surface treatment of stone with a pure water jet. In this study, these have been evaluated as performance parameters, and a specific method has been developed for material removal measurements and calculations. A set of 27 raster scanning tests was performed with a constant nozzle diameter (0.3 mm), distance between jet sweep lines (1.5 mm), and angle of inclination of the jet (30°) and varying standoff distances (50, 100, and 150 mm), traverse velocities (5, 15, and 25 m/min), and pump pressures (200, 250, and 300 MPa). It is observed that the excavation rate decreases as the standoff distance increases, whereas it increases with pressure. The specific energy increases with traverse velocity, standoff distance, and pressure, although it is not considered whenever the nozzle is moved fast and positioned away from the target.

Keywords:
water jet, stone treatment, surface treatment, energy, machining, performance

Paper ID: JTE104617
DOI: 10.1520/JTE104617
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