Proceedings of SerbiaTrib '13

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where is I i machinability index of i-th material, p iparameter value accepted for machinabilityevaluation of i-th material, p r parameter valueaccepted for machinability evaluation of referentmaterial.Figure 24. Models of parameters roughness for theconventional technique of CLF dosingFigure 26. Values of machinability index based onenergy aspectFigure 25. Models of parameters roughness for theMQL techniqueIf the analysis is carried out from the aspect ofmaterials machinability, R y is a more relevantfactor than R a , because parameter R y indirectindicator of process condition and a direct indicatorof quality as well (Fig. 24 and 25). R y models basedon regression analysis are presented in the form ofthe function of tool wear VB, feed f and the radiusof the tool tip r for both CLF dosing techniques.The second part of this function is taken from theknown empirical expression for the theoretical levelof roughness.Comparison of material machinability was madefor both lubrication techniques under consideration.Machinability index of i-th material in regard toreferent material is defined as:±( p / p ) 1 ⋅100%I =(1)iirFigure 27. Values of machinability index based on thetool life aspectFigure 28. Values of machinability index based onsurface roughness aspectExponent of ratio p i /p r has value of +1 in casethat increase of chosen parameter has positiveeffect on machining process development;otherwise it is a -1 if effect is negative. Results of300 13 th International Conference on Tribology – Serbiatrib’13
comparison from economic, energy consumptionaspect and the aspect of quality of machining arepresented in figures 26, 27 and 28.5. CONCLUSIONMachinability is very important category in theindustry. Based on experimental research and usingthe novel model, machinability of different coolinglubrication techniques can be concluded. Cuttingforces, intensity of tool wear and surface roughnesswere used as the machinability criteria. Analysisshows that turning with MQL is a good alternativefor conventional lubrication. It is important for costof machining and for ecology as well.Future research will be performed in area of lowcost technologies, high productive and hybridmachining processes.REFERENCES[1] W. Grzesik: Advanced machining processes ofmetallic materials: theory, modelling andapplication, Elsevier B. V., Netherland, 2008.[2] L.G. Globočki: Metal cutting: theory, modelling andsimulation, (in Serbian), Faculty of MechanicalEngineering , Banja Luka, BiH, 2010.[3] J. Kopač: Cutting forces and their influence on theeconomics of machining. Journal of MechanicalEngineering, Vol. 48, No. 3, pp. 121-132, 2002[4] F. Klocke, G. Eisenblatter: Dry cutting – state ofresearch, VDI berichte, No. 1399, 1998.[5] V.N. Gaitondea, S.R. Karnik, P. Davim: Selection ofoptimal MQL and cutting conditions for enhancingmachinability in turning of brass, Journal ofMaterials Processing Technology, Vol. 204, pp 459–464, 2008.[6] N.R. Dhar, M.T. Ahmed, S. Islam: An experimentalinvestigation on effect of minimum quantitylubrication in machining AISI 1040 steel, Inter.Journal of Machine Tools & Manufacture, Vol. 47,pp. 748–753, 2007.[7] K. Weinert, I. Inasaki, J.W. Sutherland, T.Wakabayashi: Dry machining and minimumquantity lubrication, CIRP Annals - ManufacturingTechnology, Vol. 53, No. 2, pp. 511 - 537, 2004.[8] B. Sredanović: Developed of model for universalmaterial machinability defining based on cuttingprocess parameters, MSc thesis, Faculty ofMechanical Engineering, (in Serbian), Banja Luka,BiH, 2012.13 th International Conference on Tribology – Serbiatrib’13 301
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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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coated and uncoated region after ad
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has been measured between the top s
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Fig. 9 shows the wear track obtaine
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Mica samples preparationFor the ads
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According to the AFM results in fig
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[21] B. G. Sharma et al.: Character
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chemical vapor deposition method wi
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analysis (a) and an approximate che
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Table 3. Friction coefficients of s
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A.K.Oleynik, V.M.Matsevity, ea.]. /
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Most of the friction units of produ
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In order to provide both high parts
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Fig. 3. The comparison the criterio
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Table 3. Experimental and calculate
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For developing the numerical model
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,eccentricities and hydrodynamic pr
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hydrodynamic regime. However, for b
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to obtain the temperature distribut
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force (pressure) between two contac
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5E-06The total displacement [m]4.5E
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[11]. Figure 5 shows s the influenc
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efficiency of use, product quality,
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38GSA. The chemical composition, de
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niobium. It should be noted that fo
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Figure 1. Friction force on side su
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exploitation this changing is signi
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2. EFFICIENCY OF CYCLO DRIVEEfficie
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Figure 6. Dependence of cyclo drive
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common for their ability to be inst
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FNF (11)R sin cos11 21 22FNF
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Normal force [N]4000350030002500200
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analytical tests. The analytical te
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Table 4. Results of zero samples of
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noticeable, and by the end of explo
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Page 263 and 264: 4. PLASTIC BEARING APPLICATIONSRega
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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
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Page 281 and 282: In addition, as a result of cyclic
Page 283 and 284: AcknowledgementThe part of this res
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Page 293 and 294: Table 2. Impact toughness of some t
Page 297 and 298: Figure 1. Appearance of fractured f
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Page 301 and 302: additional energy is dissipated due
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Page 305 and 306: 4. CONCLUSIONTools of virtual produ
Page 307 and 308: Figure 2. Structure of the machinin
Page 309 and 310: 3. ANALYSIS OF RESULTSThe results o
Page 311 and 312: Figure 15. Surface roughness regard
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Page 317 and 318: Advantages and disadvantages of tra
Page 319 and 320: The information provided by footwea
Page 321 and 322: Force (N)5,554,543,532,521,510,50Ex
Page 323 and 324: additives, that had been, until rec
Page 325 and 326: Figure 1. Test results for samples
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Page 329 and 330: Input parameters- Current intensity
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Page 333 and 334: Lower values of current are not res
Page 335 and 336: Table 1. Chemical composition of si
Page 337 and 338: flowable at high temperatures and v
Page 339 and 340: holes (pits) emerge in the shape of
Page 341: [4] W. Schatt, K-P. Wieters, Pulver
Page 347 and 348: assumption allows us to use, instea
Page 349 and 350: where P is the load, a - radius of
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Page 357 and 358: Especially when the chain transfer
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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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