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Gear Transmission Error Metric for Use with Gear Inspection Machine
Technical Paper
2003-01-1663
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The spur timing gears in Eaton superchargers operate at low torque loads and the supercharger system is especially sensitive to gear whine noise created by minute differences in the spur gear tooth profile quality. This has necessitated the grinding of very high quality profiles on high-contact-ratio spur gears. The manufacturing operation has used subjective evaluation of profile and lead measurements to qualify grinder diamonds and audit gear quality related to noise. They have also relied on supercharger end-of-line-testers to provide a direct measurement of gear noise as the primary quality feedback to the gear manufacturing process. Since the difference in the inspection plots of very high quality profiles is difficult to determine subjectively, the inspection process assessments have been difficult to correlate to the resultant gear noise measurements. The transmission error (TE) calculated from these profile measurements provided and objective assessment that was shown to correlate well with the actual measured gear whine noise. This study resulted in the creation of TE monitoring software that was an add-on to the inspection machine. This software, which uses a version of the LDP code (by The Ohio State Gear Dynamics Laboratory) as the core calculation routine, provides an objective metric of the gear mesh frequency TE and several harmonics calculated from the measured involute profile data. This objective TE metric provides a traceable standard for ensuring low vibration excitation in the gear mesh directly after grinding the gears.
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Citation
Glover, R. and Rauen, D., "Gear Transmission Error Metric for Use with Gear Inspection Machine," SAE Technical Paper 2003-01-1663, 2003, https://doi.org/10.4271/2003-01-1663.Also In
References
- Load Distribution Program, Gear Dynamics and Gear Noise Research Laboratory, Web Page http:gearlab.eng.ohio-state.edu, The Ohio State University, Columbus, OH.
- Smith, J.D., Gears and Their Vibration, The Macmillan Press Ltd., New York, 1983.
- Munro, R. G. “Gear Statics and Dynamics”, Notes from Gear Noise Short Course, The Ohio State University, 1995
- Houser, D. R., “Gear Noise”, Chapter 16 in Dudley's Gear Noise Handbook, Townsend D., Editor, McGraw Hill, 1992
- Houser, D. R., Oswald, F. B., Valco, M. J., Drago, R. J., Lenski, J. W., “Comparison of Transmission Error Predictions with Noise Measurements for Several Spur and Helical Gears”, 30th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 1994 June 27, Indianapolis.
- Glover, R. C., Sereshteh, A., Lim, Dr. T.; “Application of Specialized FEA Dynamic Modeling Techniques For Noise Reduction of Superchargers”, Proceedings of the 1999 SAE Noise and Vibration Conference, Traverse City, MI., Volume I, pp 525-529.
- Bair J.J., Pickornik W., Melkerson R., O'Boyle T., “Axle Gear Noise Quality Inspection”, Eaton Corporation, SAE 740110.