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Reducing of Scuffing Phenomenon at HCR Spur Gearing

  • Milan Rackov
  • Maja Čavić
  • Marko Penčić
  • Ivan Knežević
  • Miroslav Vereš
  • Milan Tica
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

The article deals with possibility of increasing the resistance of HCR spur gearing from a scuffing point of view. Scuffing is the process that occurs when the surfaces of two contacting bodies are joined by localized welding and then pulled apart. A material transfer occurs between the two contacting surfaces due to high metal-to-metal contact and hence produces a weld. Since there are great pressures between teeth flanks and the load is higher, the scuffing is the most important damage of teeth flanks of HCR involute gears. The scuffing traces appear in the form of streaks or scratches with rough bottoms and sides, often appearing as bands of variable depth width oriented in the direction of the height of the tooth, and affect isolated zones or their whole width. In the case of warm scuffing; the combination of high pressure exists between teeth surfaces, high sliding speeds, and excessive contact temperature, resulting from pressure and sliding speed values, which cause oil film rupture between the teeth flanks. HCR profiles are more complicated than standard involute profiles, they have greater predisposition for occurring interference, pointed tip thickness, but also undercut of teeth during the production (primary production interference). Due to increased addendum height, there is larger possibility of occurring some interference or pointed tooth tip. Therefore it should prevent these errors and check if all equation and constraints are satisfied. This paper describes finding optimal solutions for geometry of the tooth curve profile. It will be defined certain values addendum heights for meshing wheel according to criteria of specific slips and corrected head shape of the teeth of both wheels. In the same time, this optimization is joined with assessment and theoretical analysis of the impact of the HCR tooth profile resistance to scuffing on the basis of integral temperature criterion according to Winter-Michaelis criterion. A significant benefit in a theoretical area is generalization of the integral temperature criterion for involute HCR gearing.

Keywords

HCR gearing Geometry Scuffing Optimization 

References

  1. 1.
    Kuzmanović S, Vereš M, Rackov M (2010) Product Design as the Key Factor for Development in Mechanical Engineering, In: Proceedings of international conference mechanical engineering in XXI Century. Niš, Serbia, pp 113–116Google Scholar
  2. 2.
    Kasuba R (1981) Dynamic loads in normal and high contact ratio spur gearing. In: International symposium on gearing and power transmissions. Tokyo, Japan, pp 49–55Google Scholar
  3. 3.
    Sato T, Umezawa K, Ishikawa J (1983) Effect of contact ratio and profile correction of spur gears on the rotational vibrations. Bull JSME 26(221):2010–2016CrossRefGoogle Scholar
  4. 4.
    Kahraman A, Blankenship GW (1999) Effect of Involute Contact Ratio on Spur Gear Dynamics. ASME J Mech Des 121:112–118CrossRefGoogle Scholar
  5. 5.
    Vereš M, Kuzmanović S, Rackov M (2012) Experimental research of HCR gearing from pitting damage point of view, In: Proceedings of 7th international symposium about mechanical and industrial engineering—KOD. Balatonfüred, Hungary, pp 317–320Google Scholar
  6. 6.
    Michaelis K Gear failures—scuffing (course at the university of Ljubljana), Forschungsstelle für Zahnräder und Getriebebau Gear Research Centre, FZG TU MünchenGoogle Scholar
  7. 7.
    Gears—Wears and Damage to Gear Teeth—Terminology (1995) International organization for standardization, ISO 10825Google Scholar
  8. 8.
    Rackov M, Vereš M, Kanovi Ž, Kuzmanović S (2013) HCR gearing and optimization of its geometry. Adv Mater Res 633:117–132CrossRefGoogle Scholar
  9. 9.
    Rackov M (2014) Optimization of HCR gearing geometry from scuffing point of view, PhD thesis (in English), slovak university of technology in Bratislava, faculty of mechanical engineeringGoogle Scholar
  10. 10.
    Blok H (1937) Theoretical study of the temperature rise at surfaces of actual contact under oiliness conditions. Inst Mech Eng General Discuss Lubr 2:222–235Google Scholar
  11. 11.
    Winter H, Michaelis K, Oct/Nov (1984) Scoring load capacity of gears lubricated with EP-Oils, technical university of Munich, gear technologyGoogle Scholar
  12. 12.
    Tragfähigkeitsberechnung von Stirnrädern—Berechnung des Freßtragfähigkeit, DIN 3990–4Google Scholar
  13. 13.
    Vereš M (1987) Odolnost ozubenia voči zadieraniu z hladiska jeho tvaru. Kandidatska dizertačna praca, Slovenska vysoka škola technicka v Bratislava, Strojnicka fakulta, BratislavaGoogle Scholar

Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Milan Rackov
    • 1
  • Maja Čavić
    • 1
  • Marko Penčić
    • 1
  • Ivan Knežević
    • 1
  • Miroslav Vereš
    • 2
  • Milan Tica
    • 3
  1. 1.Faculty of Technical SciencesUniversity of Novi SadNovi SadSerbia
  2. 2.Faculty of Mechanical EngineeringSlovak University of Technology in BratislavaBratislavaSlovakia
  3. 3.Faculty of Mechanical EngineeringUniversity of Banja LukaBanja LukaBosnia and Herzegovina

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