Journal of Mechanical Engineering >

2018 , Vol. 54 >Issue 7: 114 - 122

DOI: https://doi.org/10.3901/JME.2018.07.114

Research on Normal Contact Stiffness of Micro-segments Gear Based on Improved Fractal Model

  • LIU Peng ,
  • ZHAO Han ,
  • HUANG Kang ,
  • CHEN Qi ,
  • XIONG Yangshou
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  • School of Mechanical Engineering, Hefei University of Technology, Hefei 230009

Received date: 2017-04-05

  Revised date: 2017-12-05

  Online published: 2018-04-05

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Abstract

The friction factor is introduced to calculate the normal contact stiffness of micro-segments gear accurately, when the contact stiffness, the impact of introducing. The fractal model applicable to micro-segments gear teeth is deduced by correcting the critical area formula friction plastic deformation, stiffness and contact area formula based on existing joint surface normal contact stiffness fractal model and combined with the area distribution formula of cylindrical joint surface. The relationship between the load and the normal contact stiffness is established through this model, analysis results show that:In the absence of friction conditions, the normal contact stiffness shows the maximum, decreases with the increasing friction coefficient. When the friction coefficient is small, the impact of the coefficient of friction on the cylinder normal contact stiffness is also small. The influence factors on surface microstructure normal contact stiffness required to consider the interaction of fractal dimension and fractal roughness amplitude which have a complex relationship. Inner contact form, increasing material parameters and the radius of the cylinder can make normal contact stiffness increases. Finally, a group micro-segments gear of different surface roughness is simulated as a reference for machining method and process selection of micro-segments gear.

Key words： normal contact stiffness; micro-segments gear; friction; fractal

Cite this article

LIU Peng , ZHAO Han , HUANG Kang , CHEN Qi , XIONG Yangshou . Research on Normal Contact Stiffness of Micro-segments Gear Based on Improved Fractal Model[J]. Journal of Mechanical Engineering, 2018 , 54(7) : 114 -122 . DOI: 10.3901/JME.2018.07.114

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