Proceedings of SerbiaTrib '13

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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
efficiency of use, product quality, reduce of costsand save energy and materials" which is supportedby Ministry of Education and Science of theRepublic of Serbia.REFERENCES[1] J. Bitter: A studu of erosion phenomena, part I,Wear, No. 6, pp. 5-21, 1963.[2] I.M.Hutchings, R.E.Winter, J.E.Field: Severe Solidparticle erosion of metals: the removal of surfacematerial by spherical projectils, in:Proc.R.Sec.Lond.A., 348, London, pp.379-302[3] A. Akkurt: Cut Front Geometry Characterization inCutting Applications of Brass with Abrasive WaterJet, Journal of Mterials Engineering andPerformance, pp. 599-606, 2010.[4] J. Xu, B. You, X. Kong, Design and ExperimentResearch on Abrasive Water-jet Cutting MachineBased on Phased Intensifier, in: Proceedings of the17th World Congress, Seoul, Korea, July 6-11,pp.14846-14851, 2008.[5] J. Baralić, B. Nedić, P. Janković: The traverse speedinfluence on surface roughness in abrasive waterjetcutting applications, in: : Proceedings of the 12thInt.Conf. on Tribology, Kragujevac, Serbia, pp. 349-354, May 11 – 13, 2011.[6] A.W.Momber, R. Kovacevic: Principles of AbrasiveWaterjet Machining, Springer, London, 1998.[7] N.S. Guo, H. Louis, G. Meier: Surface structure andkerf geometry in abrasive water jet cutting:formation and optimization, in: Proc. 7-th Amer.Water Jet Conf., Vol. 1, Water Jet Techn.Ass.,ST.Louis, pp.1-25,1993.[8] R. Kovacevic, R. Mohan, Y.M. Zhang: Cuttingforce dynamics as a tool for surface profilemonitoring in AWJ, ASME J. Engng. For Ind. 117,pp.340-350, 1995.[9] J.Valiček, M. Držík, M. Ohlídal, V. Mádr, L.M.Hlaváč: Optical method for surface analyses andtheir utilization for abrasive liquid jet automation,in: Proc. of the 2001 WJTA American WaterjetConference, Minneapolis, pp. 1–11, 2001.[10] M. Hashish: A modeling study of jet cutting surfacefinish, PED-Vol.58, pp.151-167, 1992.[11] E. Lemma: Maximum depth of cut and mechanicsof erosion in AWJ oscillation cutting of ductilematerials, Journal of Materials ProcessingTechnology, Vol. 160, No. 2, pp.188–197, 2005.13 th International Conference on Tribology – Serbiatrib’13 221
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SerbianTribologySocietyFacultyofEng
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Serbian Tribology SocietyUniversity
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Supported byMinistry of Education,
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PrefaceThe International Conference
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ContentsPlenary Lectures1. THE GREE
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27. WEAR CHARACTERISTICS OF HYBRID
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Tribometry57. PRELIMINARY STUDY ON
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Plenary Lectures13 th International
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Serbian TribologySocietySERBIATRIB
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Figure 4. Diagram of the height and
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Realization of the approach is base
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edge without chamfer and smaller ra
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Figure 7. Accumulated tool life in
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Figure 13. Calculated and measured
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Friction deformation of the bronze
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engine cylinders of 2-cylinder-twot
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Table 1: Chemical composition of sa
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Table 4: Comparative wear-resistanc
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- measuring of coating thickness h
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Figure 5. Functional scheme of the
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Table 2. Test results for massive w
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knowledge transfer in the field ofm
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Table 1. Parameters of the electroc
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Figure 6. Wear resistance by linear
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coatings and observed their good we
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c)a)Figure 2: SEM images and micros
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Room temperature 300°CNi/µSiCNiNi
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COF [-] COF [-]Fig.9: COF graphs at
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about 260 nm is related to isolated
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contact’s conformity [18] they ob
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In order to calculate the metallic
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microscopic inspection of the Rp3 s
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otating plate. The shaft passes thr
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similar trends of variation are obs
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smooth, gear fiber-mild steel rough
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[2] Tabor, D.: “Friction and wear
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(10, 50 and 100 N) against surface
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[9] B.R. Gligorijevic, A. Vencl, B.
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dielectric properties, high resista
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parameter, Sv, was slightly influen
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dependence of roughness height and
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Polyethylenes with a molecular weig
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[9] K.S. Kanaga Karuppiah, A.L. Bru
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MgCO3•CaCO3 (13% Mg), and carnall
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fully compatible with MRI/MSCT imag
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5. CONCLUSIONThe magnesium alloys a
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Zinc dialkyldithiophosphate (ZDDP)
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C- Lower deposits with NPNA on comb
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films. Carraro et al. [10] examined
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PlateCount No.Critical Load ( N)120
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solid melt of ZA27 alloy using mech
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SiC particles are uniformly distrib
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in number of micro-cracks and clust
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PBT has the average values of the f
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mechanical pressure and thermal loa
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3. EXPERIMENTAL RESULTSTaking into
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[12] L. Blunt De, X. Jiang: Advance
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2. EXPERIMENTALTESTING2.1 MaterialT
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figure 3a it could be seen that the
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and lubrication is done so that the
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5. CONCLUSIONFigure 11. The accumul
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esistance was found for composite c
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onze, which is embedded within the
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The test contact pair meets the req
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complete. The SEM analysis maycontr
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tg( ) tg 100, [%] (2)tgwhere are:
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corresponding to the maximum value
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electrostatics [17]. Due to the fle
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250nm size have been observed, acco
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ETH Zurich, Switzerland, where all
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comparison with the synthetic reinf
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3. RESULTS AND DISCUSSION3.1 Micros
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(a)(b)Figure 4. Showing (a) variati
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composites. But the composite compo
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Page 185 and 186: coated and uncoated region after ad
Page 187 and 188: has been measured between the top s
Page 189 and 190: Fig. 9 shows the wear track obtaine
Page 193 and 194: Mica samples preparationFor the ads
Page 195 and 196: According to the AFM results in fig
Page 197 and 198: [21] B. G. Sharma et al.: Character
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Page 201 and 202: analysis (a) and an approximate che
Page 203 and 204: Table 3. Friction coefficients of s
Page 205: A.K.Oleynik, V.M.Matsevity, ea.]. /
Page 211 and 212: Most of the friction units of produ
Page 213 and 214: In order to provide both high parts
Page 215 and 216: Fig. 3. The comparison the criterio
Page 217 and 218: Table 3. Experimental and calculate
Page 219 and 220: For developing the numerical model
Page 221 and 222: ,eccentricities and hydrodynamic pr
Page 223 and 224: hydrodynamic regime. However, for b
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Page 233: [11]. Figure 5 shows s the influenc
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Page 239 and 240: niobium. It should be noted that fo
Page 241 and 242: Figure 1. Friction force on side su
Page 243 and 244: exploitation this changing is signi
Page 245 and 246: 2. EFFICIENCY OF CYCLO DRIVEEfficie
Page 247 and 248: Figure 6. Dependence of cyclo drive
Page 249 and 250: common for their ability to be inst
Page 251 and 252: FNF (11)R sin cos11 21 22FNF
Page 253 and 254: Normal force [N]4000350030002500200
Page 255 and 256: analytical tests. The analytical te
Page 257 and 258: Table 4. Results of zero samples of
Page 259 and 260: noticeable, and by the end of explo
Page 263 and 264: 4. PLASTIC BEARING APPLICATIONSRega
Page 267 and 268: For Elastohydrodynamic film thickne
Page 269 and 270: The results concluded for different
Page 271 and 272: For Thrust Force of 40KNKrytox 215
Page 273 and 274: Krytox 215 (µ = 0.03204 Pa.s)Figur
Page 277 and 278: - Reliable exploitation tools, prim
Page 281 and 282: In addition, as a result of cyclic
Page 283 and 284: AcknowledgementThe part of this res
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Thepressure angle can be calculated
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mechanism these parameters are fina
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causes big changes of their propert
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Table 2. Impact toughness of some t
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Figure 1. Appearance of fractured f
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implementation of these new manugac
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additional energy is dissipated due
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The adopted geometry parameters are
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4. CONCLUSIONTools of virtual produ
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Figure 2. Structure of the machinin
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3. ANALYSIS OF RESULTSThe results o
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Figure 15. Surface roughness regard
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From the analysis of the diagram it
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comparison from economic, energy co
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Advantages and disadvantages of tra
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The information provided by footwea
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Force (N)5,554,543,532,521,510,50Ex
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additives, that had been, until rec
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Figure 1. Test results for samples
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Table 7. Test results of oil sample
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Input parameters- Current intensity
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edge formed into a thin line. At th
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Lower values of current are not res
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Table 1. Chemical composition of si
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flowable at high temperatures and v
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holes (pits) emerge in the shape of
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[4] W. Schatt, K-P. Wieters, Pulver
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assumption allows us to use, instea
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where P is the load, a - radius of
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determination (total running in tim
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μm, compared with Figure 17, wich
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Serbian TribologySocietySERBIIATRIB
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Especially when the chain transfer
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is obvious that this isa so-calledw
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winches. The authors are inclined t
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find parameters of robot laser hard
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each of which is measured by the le
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Fractal dimensions were determined
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Figure 3. Modified force acting sch
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0.25Lubricant: L3DC 04Friction coef
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nanocomposites. The influence of fi
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4. RESULTS AND DISCUSSION4.1 Morpho
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Figure 6. Loading and unloadin vers
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3 8 12 1 4 2 4
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The material after qualifying the r
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It has already been mentioned that
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Degradation & Stability, Vol. 69, N
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conformance to researchers’ requi
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This part is assembled of pneumatic
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matrixes describe the state of the
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values influence of themeasurement
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Figure 1. Friction stir weldinga -
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(t 2 t
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M fr / T [-] [-]10.90.80.70.60.50.4
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M fr / T [-]10.90.80.70.60.50.40.30
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experimentally determined that for
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4. DISCUSSIONAccording to the theor
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2.1 The life cycle of the reportThe
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Obviously the report is checked and
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uticaja na osnovu kompozita, a time
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5. ZAKLJUČCIStruktura tiksolivene
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dobijene različite karakteristike
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vizuelno, na dnevnoj svetlosti, pod
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LITERATURA[1] Зинченко В.
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Slika 1. Rotorni bager - glodar VII
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stvaraju sliku stanja i svoja zapa
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njihovih kotrljanih elemenata. Mere
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postupka i uticaja parametara depoz
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posledica različite raspodele mikr
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ZrO 2 Y 2 O 3 je takođe zbog oksid
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3.2 Pneumatska osetljivostOblast pr
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p mg (δ), koji je zbog malih struj
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PNEUMATIC PROBE HEAD SELECTION FOR
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1. Podsistem kopanja2. Podsistem pr
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Slika 3. Kriva habanjaNa tom dijagr
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Mjereni su parametri habanja i pril
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preše prevladavaju kombinirani uvj
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a) b)Slika 5. Karakteristična mikr
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varijantnih materijala u dostavnom
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Jovanović D. 414, 446KKaleicheva J
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CIP - Каталогизација
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