Proceedings of SerbiaTrib '13

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using number possibilities of 3D modellingsoftware packages.8623Figure 1. Sub-divided components of tribometer modelFirst of all, whole design of the tribometer isbased on container with a plate and oil (1), placedon a horizontal linear guides (2), movingalternately, while pin is stationary. Pin bracket (3)is set to vertical linear guides (4) and given loadson the pin passed through the bar, which is also adynamometer for measuring of friction force. Drivesystem for reciprocation motion is pneumatic (5)with pneumatic cycle counter (6).On container with a plate (1) displacementtransducer is fixed (7), with function to measure, inreal time, container position and thus enable theaccurate determination of velocity and momentswhen container change movement direction. On atribometer base plate surface there is a connectionpanel for this transducer (8).Now will be described the most important partof the tribometer, the contact zone where tests areperformed (figure 2).1475Value of normal load in the contact zone isdefined by calibrated weights (1) where the forcestransferred through the shaft (2) with a sphericalend are to the pin bracket (3). Compensation ofown mass elements which are located on the pinbracket is performed through a spring with athreaded spindle (4). On pin bracket (3) set thesingle-axis piezoelectric vibration sensor (6) whichmeasures vibrations in the tribological contact inthe vertical direction.The close-up view of the above describedcontact zone is shown in figure 3.Figure 3. Close up view of contact zoneThere is a plate attached at the bottom ofaluminium container. Pin has cone top that fits intoa spherical end of the dynamometer bar and thuscarries the normal force evenly over the entiresurface of contact. Container has a volume of 500ml and is filled oil up with oil to about 1/3 of itsheight. Container is covered with a transparentcover on which there are connections for oilcirculation - suction and return. Suction line takesoil from the bottom of container on one side andreturns oil back to the surface on the other side ofcontainer. This is to ensure adequate oil mixingduring circulation.And, at the end the third part of the tribometer ispneumatic system (figure 4).147332Figure 2. System for setting load and forcemeasurementFigure 4. Pneumatic drive unit382 13 th International Conference on Tribology – Serbiatrib’13
This part is assembled of pneumatic cylinder(1), air-operated distribution valve 5/2 (2), twopneumatic limit switches (3), pneumatic logic valve3/2 (4), pneumatic cycle counter and the resetbutton. Limit switches limit stroke of cylinderpiston which is fixed to container. Switches arefixed and the stroke length is determined byvarying the length of a cylindrical end part ofcylinder (7) which activated limit switches. At bothcommand lines, which bring compressed air to thecylinder, set of throttle valves that regulate thespeed of the cylinder in both directions.4. CONCLUSIONIn the times where financial savings are moreimportant than results, there need to be the waywhich will satisfy both conditions. Besides that,there is a constant need for various types ofexperiments which need to be precise and its resultsneed to be accurate. Development of modulartribometers could be good solution for issuesrelated for rapid construction of tribometer andobtaining accurate results for selected parameters.Tribometer which is designed from modules testedand verified through simulations it is very simple toproceed to the next step regarding construction.Desired and requested parameters are alsoimportant because software could obtain possiblemistakes and failures in design before construction.ACKNOWLEDGMENTResearch presented in this paper was supportedby Ministry of Science and TechnologicalDevelopment of Republic of Serbia, GrantTR-35021, Title: Razvoj triboloških mikro/nanodvokomponentnih i hibridnih samopodmazajućihkompozita.REFERENCES[1] E. Sajewicz, Z. Kulesza: A new tribometer forfriction and wear studies of dental materials andhard tooth tissues, Tribology International 40,pp. 885–895, 2007.[2] S.K. Sinha, S.L. Thia, L.C. Lim: A new tribometerfor friction drives, Wear, Vol 262, pp. 55–63, 2007.[3] J.L. Dion, G. Chevallier, O.Penas, F.Renaud: A newmulticontact tribometer for deterministic dynamicfriction identification, Wear 300, pp. 126–135,2013.[4] K.D. Moerlooze, F. Al-Bender, H.V. Brussel: Anexperimental study of ball-on-flat wear on a newlydeveloped rotational tribometer, Wear 271,pp. 1005– 1016, 2011.[5] P.J. Blau: Friction Science and Technology, MarcelDekker, New York, 1996.[6] M.R. Kashani, E. Behazin, A. Fakhar: Constructionand evaluation of a new tribometer for polymers,Polymer Testing 30, pp. 271–276, 2011.[7] URL: www.microtest-sa.com/index.php?lang=en(accessed: 04.03.2013.)[8] M.K. Malhotra, M.L. Heine, V. Grover: Anevaluation of the relationship between managementpractices and computer aided design technology,Journal of Operations Management 19,pp. 307–333, 2001.[9] W.C. Regli, V.A. Cicirello: Managing digitallibraries for computer-aided design, Computer-Aided Design 32, pp. 119–132, 2000.[10] C.B. Mohan, C. Divakar, K. Venkatesh, K.Gopalakrishna, K.S. Mahesh Lohith, T.N. Naveen:Design and development of an advanced linearreciprocating tribometer, Bengaluru 562112, India2009.[11] G.W. Stackhowiak, A.W. Batchelor, G.B.Stachowiak, Experimental methods in tribology,Tribology Series 44, Elsevier Science, 2004.13 th International Conference on Tribology – Serbiatrib’13 383
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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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4. PLASTIC BEARING APPLICATIONSRega
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For Elastohydrodynamic film thickne
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The results concluded for different
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For Thrust Force of 40KNKrytox 215
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Krytox 215 (µ = 0.03204 Pa.s)Figur
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- Reliable exploitation tools, prim
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In addition, as a result of cyclic
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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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Page 357 and 358: Especially when the chain transfer
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Page 381 and 382: 4. RESULTS AND DISCUSSION4.1 Morpho
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Page 389 and 390: The material after qualifying the r
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Page 395: conformance to researchers’ requi
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Page 413 and 414: 4. DISCUSSIONAccording to the theor
Page 417 and 418: 2.1 The life cycle of the reportThe
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Page 427 and 428: 5. ZAKLJUČCIStruktura tiksolivene
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Page 433 and 434: LITERATURA[1] Зинченко В.
Page 435 and 436: Slika 1. Rotorni bager - glodar VII
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Page 439 and 440: njihovih kotrljanih elemenata. Mere
Page 441 and 442: postupka i uticaja parametara depoz
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Page 445 and 446: 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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