Volume 40, N. 3, September-December 2017 | PAPER(5 downloads)
This paper presents investigations on the behavior of four types of rocks (syenite, granite, marble and sandstone) subjected to abrasive waterjet cutting. The influence of traverse velocity and pump pressure on the efficiency of cutting is analyzed. Moreover, the influence of the physical-mechanical behavior of the rocks on their removal process is investigated. It was found that, in general, the removed volume of rock and the cutting rate tend to increase with the decrease of traverse velocity and with the increase of pump pressure. Moreover, the opposite trend was observed in the analysis of the specific energy of cutting. Optimum conditions of cutting efficiency were found when cutting the studied rocks with a traverse velocity of 200 mm/min and a pump pressure of 400 MPa. Finally, the marble and the sandstone presented the lowest resistance to abrasive waterjet cutting while the syenite and granite presented the highest resistances.