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Shape Parameters Measurement of Profile-Shifted Spur and Helical Gears

[+] Author Affiliations
Ah-Der Lin

Cheng-Shiu University

Jao-Hwa Kuang

National Sun Yat-Sen University

Paper No. IMECE2005-80191, pp. 307-317; 11 pages
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Design Engineering, Parts A and B
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Design Engineering Division
  • ISBN: 0-7918-4215-0 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME


Various measurement methods have been proposed to measure the tooth shape parameters of profile-shifted spur and helical gears. This study proposes an over-balls measurement technique based on the tooth form equations of the profile-shifted spur and helical gears. The relations between the over-ball distance and the tooth parameters, i.e. the profile-shifted factor and the pressure angle, are derived for the two gears. The effect of the ball size on the accuracy of the measurements is investigated. An algorithm is proposed to extract the profile-shifted factor and the pressure angle from the measured over-ball chordal lengths. A good agreement is found between the calculated data and the measured results. Hence, the proposed inverse measurement method provides a feasible approach for obtaining highly accurate estimates of the tooth shape parameters of profile-shifted spur and helical gears.

Copyright © 2005 by ASME
Topics: Gears , Shapes , Spur gears



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