Proceedings of SerbiaTrib '13

winches. The authors are inclined to think that aproper choice of frame and accessory devices forpositioning, funds can be recovered at the level ofthe two-year. It should be noted that this positionerwhich is semiautomated has positive effects onwelding proces in terms of safety. In particular, ifone takes into account that safety in the workplaceis one of the most important categories of businessin modern conditions of production. On the otherhand, the structure is very efficient and suitable forwide application in industrial practice. A veryimportant advantage of this design is that themachine can be made with a lot of low costelements. If we look at design, it is more than clearthat the design does not require a particularly highaccuracy and precision manufacturing. It wastended to meet function durring design of device, tobe easy for manufacture, to be easy formanipulation, to have lowest cost possible and tosatisfy safety requirements.REFERENCE[1] M. Đurđanović, D. Stamenković: Trenje mirovanjauslovikretanja, SERBIATRIB`07[2] Peter J. Blau: The significance and use of thefriction coefficient, Tribology International,Vol. 34, pp 585–591, 2001.[3] K.-H. Zum Gahr, K. Voelker, Friction and wear ofSiC fiberreinforced borosilicate glass mated to steel,Wear 225–229, pp 88–895, 1999.[4] P. Blau, The significance and use of the frictioncoefficient, Tribol. Int. 34, pp 585–591, 2001.[5] B. Ivkovic, M. Djurdjanovic, D. Stamenkovic: TheInfluence of the Contact Surface Roughness on theStatic Friction Coefficient, Tribology in Industry,Vol. 22, No. 3&4, pp 41-44, 2000.[6] U. Muller, R. Hauert: Investigations of thecoefficient of static friction diamond-like carbonfilms, Surface and Coatings Technology 174–175,pp. 421–426, 2003.[7] B. Polyakov, S. Vlassov, L.M. Dorogin, P. Kulis, I.Kink, R.Lohmus: The effect of substrate roughnesson the static friction of CuO nanowires, SurfaceScience, Vol. 606, pp 1393–1399, 2012.[8] D.A. Desai: What is rolling friction, Resonance 9,pp 52-54, 2004.[9] T. Pöschel, T. Schwager, N.V. Brilliantov, Rollingfriction of a hard cylinder on a viscous plane, TheEuropean Physical Journal B - Condensed Matterand Complex Systems 10, pp 169-174, 1999.[10] A.I. El'kin, A. I. Moskovkin, E. I. Veksel'man,Maximum force of friction in rubber-metal frictionpairs under conditions of constant compressivedeformation of the rubber, Mekhanika Polimerov,Vol. 3, No. 3, pp. 533–538, 1967.[11] B.N.J. Persson, A.I. Volokitin, Rubber friction onsmooth surfaces, The European Physical Journal E,21, pp 69-80, 2006.[12] Akbar Shojaei, Mohammad Arjmand, Amir Saffar,Studies on the friction and wear characteristics ofrubber-based friction materials containing carbonand cellulose fibers, Journal of Materials ScienceMarch 2011, Volume 46, Issue 6, pp 1890-1901[13] M.E.R. Shanahan, N. Zaghzi, J. Schultz, A. Carré,Hard Rubber/Metal Adhesion Assessment Using aHeavy Cylinder Rolling Test, Adhesion 12, pp 223-238, 1988.[14] Valentin L. Popov, Rubber Friction and ContactMechanics of Rubber, Contact Mechanics andFriction, pp 255-270, 2010.13 th International Conference on Tribology – Serbiatrib’13 347