Proceedings of SerbiaTrib '13

5.CONCLUSIONL w10 L wFigure6. Measuringthe length of ten wavesFor thismeasured values (10L w ), based onFormula 1, the time needed to maketen waves (t 10 )was calculated.0L wt 10 10 VBased onthese values, according to Formula 2,the number of waves that were made in one minute(N) was calculated.t 10 10∙60t 10∙60 s(1)(2)Table 1 shows the images of 6mm thicksamples, obtained withdifferent traverse t speeds,and values for 10L w , t 10 and N.Table 1. 6mmm thick samplesBy analyzing the results, it was observed that achange in traverse speed affects the wavelength andheight on surface machinedd with abrasive water jet.As the traversee speed increases, the higher is thewavelength of profile waviness. Also, machiningwith higher traverse speed results in theincrease ofheight of profile waviness. The most interesting isthe fact that, regardless off the traverse speed andthickness of thee workpiece, , the numberr of waves inoneminute is i approximately the same. Thefrequency of the waves, andd also the curved lines, isapproximately constant c andd in this case ranges from460to 476 waves w per minute. This fact canprobably be explained with fluctuationss in the valueof the operatingg pressure of the abrasive water jet.In order to better explain the relationship betweenpressureoscillationsandprofile wavinesssfrequency, more detailed examination are required.Table 2. 10mm thick t samplesV[mm/min]200300Images ofsamples10L w[mm]t 10[s]N[1/min]Waves are a notclearly markedWaves are a notclearly markedV[mm/min]Images ofsamples10L w[mm]t 10[s]N[1/min]4008.4 1.266 476.2200Waves are notclearly marked50010.6 1.272 471.7300Waves are notclearly marked80016.8 1.266 476.24008.41.26 476.2100021.1 1.266 473.950010.61.272 471.7800100016.821.11.26 476.21.266 473.9ACKNOWLEDGMENTSSThe authors would like to thank to the Ministryof Science andd Technological Development of theRepublic of Serbia. Paper is result of technologicallproject TR35034: "The research of modern non-conventionaltechnologiesapplicationinmanufacturingcompanies with the aimof increasee22013 th International Conference C onn Tribology – Serbiatrib’13