The Use of Cooling Holes to Decrease the Amount of Thermal Damage on a Plastic Gear Tooth
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A new method was developed to decrease the amount of thermal damage on the contact surface of a plastic gear tooth. The main aim of this method is to decrease the amount of thermal damage on the tooth surface by reducing the heat accumulated in the tooth under working conditions. For this reason, air-cooling holes on the plastic gear tooth were drilled in different locations, with the intention of lowering the tooth temperature by transferring the heat away from the tooth through these holes via convection. Using three the different configurations of holes, the air and temperature at the tooth contact zone were measured and compared.
KeywordsPlastic gears Gear surface temperature Durability Frictional heating
This study was supported by the Coordination ship of Hema Endustri A.S., and Selcuk University’s Scientific Research Projects by TUBITAK (The Scientific and Technological Research Council of Turkey) Project No. (108 M 178).
- 2.Passaglia, E., Knox, J.R.: Viscoelastic behaviour and time–temperature relationships. In: Baer, E. (ed.) Engineering Design for Polymers, pp. 143–198. SPE Polymer Science and Engineering Series, Reinhold Publishing Corporation, New York (1964)Google Scholar
- 3.Dominick, V.R., Donald, V.R., Marlene, G.R.: Polymers Design Handbook. Kluwer Academic Publications, Boston (2000)Google Scholar
- 4.Terashima, K., Tsukamoto, N., Nishida, N., Shi, J.: Development of polymer gears for power transmission (abnormal wear near tooth root and tooth fracture near pitch point). Bull. Japan Soc. Mech. Engrs. 29(251), 1598–1604 (1986)Google Scholar
- 7.Bell, T.: Surface engineering-past, present and future. Surf. Eng. 6(1), 31–40 (1990)Google Scholar
- 8.Senthilvelan, S., Gnanamoorthy, R.: Effect of rotational speed on the performance of unreinforced an glass fiber reinforced Nylon 6 spur gears. Mater. Des. 28, 765–772 (2007)Google Scholar
- 17.Senthilvelan, S., Gnanamoorthy, R.: Effect of gear tooth fillet radius on the performance of injection molded Nylon 6/6 gears. Mater. Des. 27, 632–639 (2006)Google Scholar
- 19.Koffi, D., Gauvin, R., Yelle, H.: Heat generation in thermo polymer spur gears. J. Mech. Transm. Trans. ASME 107, 31–37 (1985)Google Scholar
- 21.Mao, K.: Wear characteristic of non-metalic gears, school of manufacturing and mechanical engineering. Ph.D. thesis, The University of Birmingham (1993)Google Scholar
- 22.Tsukamoto, N., Terashima, K.: Development of plastic gears for power transmission (various methods of lengthening the life of polymer gears and their effect. Bull. JSME 29(47), 249–255 (1986)Google Scholar