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Research Papers: Design of Direct Contact Systems

An Approach for Determination of Basic Machine-Tool Settings From Blank Data in Face-Hobbed and Face-Milled Hypoid Gears

[+] Author and Article Information
Ignacio Gonzalez-Perez

Department of Mechanical Engineering,
Politechnic University of Cartagena,
Cartagena 30202, Spain
e-mail: ignacio.gonzalez@upct.es

Alfonso Fuentes

Department of Mechanical Engineering,
Polytechnic University of Cartagena,
Cartagena 30202, Spain
e-mail: alfonso.fuentes@upct.es

Ramon Ruiz-Orzaez

Department of Mechanical Engineering,
Polytechnic University of Cartagena,
Cartagena 30202, Spain
e-mail: rro0@alu.upct.es

1Corresponding author.

Contributed by the Power Transmission and Gearing Committee of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received March 9, 2015; final manuscript received June 17, 2015; published online July 22, 2015. Assoc. Editor: Hai Xu.

J. Mech. Des 137(9), 093303 (Jul 22, 2015) Paper No: MD-15-1201; doi: 10.1115/1.4031024 History: Received March 09, 2015

The conditions of meshing and contact in hypoid gear drives depend substantially on the machine-tool settings to be applied. Determination of gear geometry is the first step in the design process of a hypoid gear drive. An approach for determination of basic machine-tool settings for face-hobbed and face-milled hypoid gears is proposed, covering the cases when the gear is generated and nongenerated. Gear basic machine-tool settings are determined from the blank data that can be obtained from application of Standard ANSI/AGMA 2005-C96. Some machine-tool settings are determined analytically considering the imaginary generation of the gear by a crown gear. Some other machine-tool settings are obtained numerically in order to provide some given blank data as the normal chordal tooth thickness and the normal pressure angles of the gear teeth. The developed theory is illustrated with numerical examples.

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Figures

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Fig. 1

Hypoid gear being generated by a face-hobbing cutter

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Fig. 2

Hypoid gear being generated by a face-milling grinding wheel

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Fig. 3

For the definition of the geometry of blades

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Fig. 4

Assembly of a group of blades in a face-hobbing cutter

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Fig. 5

A right-hand face-hobbing cutter

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Fig. 6

Geometry of the cutting edges of a face-milling grinding wheel

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Fig. 7

Coordinate systems for generation of a right-hand gear

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Fig. 8

Layout of a hypoid gear drive for face-hobbed gears

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Fig. 9

For the illustration of some gear tooth blank data related to the mean normal section of the gear tooth

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Fig. 10

Plane xy of the cutting machine for a face-hobbed gear

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Fig. 11

Plane xz of the cutting machine for a face-hobbed gear

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Fig. 12

Mean normal section of a gear tooth

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Fig. 13

Plane xy of the cutting machine for a face-milled gear

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Fig. 14

Plane xz of the cutting machine for a face-milled gear

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