The fundamental design of spiral bevel and hypoid gears is usually based on a local synthesis and a tooth contact analysis of the gear drive. Recently, however, several flank modification methodologies have been developed to reduce running noise and avoid edge contact in gear making, including modulation of tooth surfaces under predesigned transmission errors. This paper proposes such a flank modification methodology for face-hobbing spiral bevel and hypoid gears based on the ease-off topography of the gear drive. First, the established mathematical model of a universal face-hobbing hypoid gear generator is applied to investigate the ease-off deviations of the design parameters—including cutter parameters, machine settings, and the polynomial coefficients of the auxiliary flank modification motion. Subsequently, linear regression is used to modify the tooth flanks of a gear pair to approximate the optimum ease-off topography suggested by experience. The proposed method is then illustrated using a numerical example of a face-hobbing hypoid gear pair from Oerlikon’s Spiroflex cutting system. This proposed flank modification methodology can be used as a basis for developing a general technique of flank modification for similar types of gears.
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e-mail: imezhf@ccu.edu.tw
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December 2007
Research Papers
Flank Modification Methodology for Face-Hobbing Hypoid Gears Based on Ease-Off Topography
Yi-Pei Shih,
Yi-Pei Shih
Graduate Student
Department of Mechanical Engineering,
National Chung Cheng University
, No. 168 University Road, Min-Hsiung, Chia-Yi, Taiwan 621, R.O.C.
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Zhang-Hua Fong
Zhang-Hua Fong
Professor
Department of Mechanical Engineering,
e-mail: imezhf@ccu.edu.tw
National Chung Cheng University
, No. 168 University Road, Min-Hsiung, Chia-Yi, Taiwan 621, R.O.C.
Search for other works by this author on:
Yi-Pei Shih
Graduate Student
Department of Mechanical Engineering,
National Chung Cheng University
, No. 168 University Road, Min-Hsiung, Chia-Yi, Taiwan 621, R.O.C.
Zhang-Hua Fong
Professor
Department of Mechanical Engineering,
National Chung Cheng University
, No. 168 University Road, Min-Hsiung, Chia-Yi, Taiwan 621, R.O.C.e-mail: imezhf@ccu.edu.tw
J. Mech. Des. Dec 2007, 129(12): 1294-1302 (9 pages)
Published Online: December 30, 2006
Article history
Received:
August 13, 2006
Revised:
December 30, 2006
Citation
Shih, Y., and Fong, Z. (December 30, 2006). "Flank Modification Methodology for Face-Hobbing Hypoid Gears Based on Ease-Off Topography." ASME. J. Mech. Des. December 2007; 129(12): 1294–1302. https://doi.org/10.1115/1.2779889
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