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Research Papers: Power Transmissions and Gearing

Machine-Tool Settings to Reduce the Sensitivity of Spiral Bevel Gears to Tooth Errors and Misalignments

[+] Author and Article Information
Vilmos V. Simon

Faculty of Mechanical Engineering, Institute of Machine Design, Department of Machine Elements, Budapest University of Technology and Economics, H-1111 Budapest, Műegyetem rkp. 3, Hungarysimon.vilmos@gszi.bme.hu

J. Mech. Des 130(8), 082603 (Jul 10, 2008) (10 pages) doi:10.1115/1.2936903 History: Received September 25, 2007; Revised April 07, 2008; Published July 10, 2008

The method for loaded tooth contact analysis is applied for the investigation of the combined influence of machine-tool settings for pinion teeth finishing and misalignments of the mating members on load distribution and transmission errors in mismatched spiral bevel gears. By using the corresponding computer program, the influence of pinion’s offset and axial adjustment error, angular position error of the pinion axis, tooth spacing error, and machine-tool setting correction for pinion teeth finishing, on tooth contact pressure, tooth root stresses, and angular displacement of the driven gear member from the theoretically exact position based on the ratio of the numbers of teeth is investigated. On the basis of the obtained results, the optimal combination of machine-tool settings is determined. By the use of this set of machine-tool settings, the maximum tooth contact pressure and transmission errors can be significantly reduced. However, in some cases, by the use of appropriate machine-tool settings for the reduction of tooth contact pressure, the angular displacement of the driven gear increases. Therefore, different optimized combinations of machine-tool settings for pinion tooth finishing for the reduction of the sensitivity of gears to misalignments in regard to maximum tooth contact pressure and transmission errors should be applied. By the use of the combination of machine-tool settings to reduce the sensitivity of gears to misalignments in regard to transmission errors, a slight reduction of maximal tooth contact pressure is achieved, too.

Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Relative position of the pinion and the gear in mesh

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Figure 2

Machine-tool setting for pinion tooth-surface finishing

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Figure 3

Influence of pinion offset and sliding base setting for pinion finishing on maximum tooth contact pressure

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Figure 4

Influence of the axial position of pinion apex and sliding base setting for pinion finishing on maximum tooth contact pressure

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Figure 5

Influence of the horizontal angular misalignment of pinion axis and sliding base setting for pinion finishing on maximum tooth contact pressure

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Figure 6

Influence of pinion offset and sliding base setting for pinion finishing on maximum angular displacement of the driven gear member

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Figure 7

Influence of pinion offset and basic radial for pinion finishing on maximum tooth contact pressure

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Figure 8

Influence of the axial position of pinion apex and basic radial for pinion finishing on maximum tooth contact pressure

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Figure 9

Influence of the horizontal angular misalignment of pinion axis and basic radial for pinion finishing on maximum tooth contact pressure

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Figure 10

Influence of pinion offset and ratio of roll in pinion finishing on maximum tooth contact pressure

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Figure 11

Influence of the axial position of pinion apex and ratio of roll in pinion finishing on maximum tooth contact pressure

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Figure 12

Influence of the horizontal angular misalignment of pinion axis and ratio of roll in pinion finishing on maximum tooth contact pressure

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Figure 13

Influence of tooth spacing error and sliding base setting for pinion finishing on maximum tooth contact pressure

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Figure 14

Influence of tooth spacing error and basic radial for pinion finishing on maximum tooth contact pressure

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Figure 15

Influence of tooth spacing error and blank offset for pinion finishing on maximum angular displacement of the driven gear member

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Figure 16

The reduction of maximum tooth contact pressure by the use of optimal machine-tool setting corrections in the case of pinion offset error

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Figure 17

The influence of optimal machine-tool setting corrections on maximum tooth contact pressure in the case of axial adjustment error of the pinion

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Figure 18

The reduction of maximum tooth contact pressure by the use of optimal machine-tool setting corrections in the case of horizontal angular misalignment of pinion axis

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Figure 19

The influence of optimal machine-tool setting corrections on angular position error of the driven gear in the case of pinion offset error

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Figure 20

The influence of optimal machine-tool setting corrections on angular position error of the driven gear in the case of axial adjustment error of the pinion

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Figure 21

The reduction of angular position error of the driven gear by the use of optimal machine-tool setting corrections in the case of horizontal angular misalignment of pinion axis

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