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

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.