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Technical Briefs

Designing and Manufacturing Spiral Bevel Gears Using 5-Axis Computer Numerical Control (CNC) Milling Machines

[+] Author and Article Information
Joël Teixeira Alves

e-mail: joel.teixeira-alves@insa-lyon.fr

Michèle Guingand

e-mail: michele.guingand@insa-lyon.fr

Jean-Pierre de Vaujany

e-mail: jean-pierre.devaujany@insa-lyon.fr
CNRS INSA-Lyon,
Université de Lyon,
LaMCoS UMR5259, F-69621,
Bat. Jean d'Alembert,
18-20 rue des sciences,
Villeurbanne Cedex 69621,
France

1Corresponding author.

Contributed by the Power Transmission and Gearing Committee of ASME for publication in the Journal of Mechanical Design. Manuscript received July 20, 2011; final manuscript received October 17, 2012; published online January 7, 2013. Assoc. Editor: Avinash Singh.

J. Mech. Des 135(2), 024502 (Jan 07, 2013) (6 pages) Paper No: MD-11-1314; doi: 10.1115/1.4023153 History: Received July 20, 2011; Revised October 17, 2012

The design of spiral bevel gears remains complex since tooth geometry and the resulting kinematic performance stem directly from the manufacturing process. Spiral bevel gear cutting up to now has relied on the works of several manufacturers. Recent advances in milling machine technology and computer aided manufacturing (CAM) now make it possible to manufacture good quality spiral bevel gears on a standard 5-axis milling machine. This paper describes the computer aided design (CAD) definition and manufacturing of spiral bevel gear tooth surfaces. Process performance is assessed by comparing the resulting surfaces after machining with the predefined CAD surfaces. This manufacturing process makes it possible to obtain geometry analytically, making design easier than with standard spiral bevel gears.

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Figures

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Fig. 1

Spherical involute

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Fig. 2

Spherical coordinates

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Fig. 3

Logarithmic spiral

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Fig. 4

Logarithmic spiral on a cone

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Fig. 5

Spherical involute with logarithmic spiral

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Fig. 7

Reference framework of a pinion and gear assembly

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Fig. 8

Tooth modifications

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Fig. 9

Influence of tooth modifications on assembly errors—contact patterns under load

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Fig. 12

Distribution of the palpated points

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Fig. 13

Metrology results for a gear tooth

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Fig. 14

Metrology results for a pinion tooth

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