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Precision of spiral-bevel gearsThe kinematic errors in spiral bevel gear trains caused by the generation of nonconjugate surfaces, by axial displacements of the gears during assembly, and by eccentricity of the assembled gears were determined. One mathematical model corresponds to the motion of the contact ellipse across the tooth surface, (geometry I) and the other along the tooth surface (geometry II). The following results were obtained: (1) kinematic errors induced by errors of manufacture may be minimized by applying special machine settings, the original error may be reduced by order of magnitude, the procedure is most effective for geometry 2 gears, (2) when trying to adjust the bearing contact pattern between the gear teeth for geometry I gears, it is more desirable to shim the gear axially; for geometry II gears, shim the pinion axially; (3) the kinematic accuracy of spiral bevel drives are most sensitive to eccentricities of the gear and less sensitive to eccentricities of the pinion. The precision of mounting accuracy and manufacture are most crucial for the gear, and less so for the pinion. Previously announced in STAR as N82-30552
Document ID
19840033163
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Litvin, F. L.
(Illinois Univ. Chicago, IL, United States)
Goldrich, R. N.
(Illinois, University Chicago, IL, United States)
Coy, J. J.
(U.S. Army, Propulsion Laboratory, Cleveland OH, United States)
Zaretsky, E. V.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 12, 2013
Publication Date
September 1, 1983
Publication Information
Publication: ASME
Subject Category
Mechanical Engineering
Report/Patent Number
ASME PAPER 82-WA/DE-33
Accession Number
84A15950
Distribution Limits
Public
Copyright
Other

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