The surface condition of a carburized gear is improved by CBN grinding, in addition to the generation of a compressive residual stress at the ground surface. To clarify the effect of these merits on the strength enhancement, a bending fatigue test is performed for the carburized and the CBN-ground gears. The fillet as well as involute tooth surface is ground by an electroplated threaded CBN wheel. The low axial feed rate and the spark-out treatment are effective in improving the surface finish and increasing the compressive residual stress, and the strengths of CBN-ground gears are increased from 100 MPa to 160 MPa in comparison with the carburized gears. Moreover, the test results are discussed on the basis of the fracture mechanics-based strength evaluation which has been proposed by the authors. This analysis demonstrates that the influence of CBN grinding on strength is smaller than the effects of surface-treatments such as shot peening and chemical polishing.
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December 1998
Research Papers
Effect of CBN Grinding on the Bending Strength of Carburized Gears
K. Inoue,
K. Inoue
Graduate School of Engineering, Tohoku University, Aramaki-Aoba, Sendai 980-8579, Japan
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H. Sonoda,
H. Sonoda
East Japan Railway, 1-6-5 Hiromachi, Shinagawa, Tokyo 140-0005, Japan
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G. Deng,
G. Deng
Faculty of Engineering, Miyazaki University, 1-1 Gakuen Kibanadai-Nishi, Miyazaki 889-2192, Japan
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M. Yamanaka,
M. Yamanaka
Graduate School of Engineering, Tohoku University, Aramaki-Aoba, Sendai 980-8579, Japan
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M. Kato
M. Kato
Graduate School of Engineering, Tohoku University, Aramaki-Aoba, Sendai 980-8579, Japan
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K. Inoue
Graduate School of Engineering, Tohoku University, Aramaki-Aoba, Sendai 980-8579, Japan
H. Sonoda
East Japan Railway, 1-6-5 Hiromachi, Shinagawa, Tokyo 140-0005, Japan
G. Deng
Faculty of Engineering, Miyazaki University, 1-1 Gakuen Kibanadai-Nishi, Miyazaki 889-2192, Japan
M. Yamanaka
Graduate School of Engineering, Tohoku University, Aramaki-Aoba, Sendai 980-8579, Japan
M. Kato
Graduate School of Engineering, Tohoku University, Aramaki-Aoba, Sendai 980-8579, Japan
J. Mech. Des. Dec 1998, 120(4): 606-611 (6 pages)
Published Online: December 1, 1998
Article history
Received:
December 1, 1997
Revised:
July 1, 1998
Online:
December 11, 2007
Citation
Inoue, K., Sonoda, H., Deng, G., Yamanaka, M., and Kato, M. (December 1, 1998). "Effect of CBN Grinding on the Bending Strength of Carburized Gears." ASME. J. Mech. Des. December 1998; 120(4): 606–611. https://doi.org/10.1115/1.2829322
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