Local Synthesis and Tooth Contact Analysis of Face-Milled, Uniform Tooth Height Spiral Bevel Gears PDF Download
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722618063
Category :
Languages : en
Pages : 52
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Book Description
Face-milled spiral bevel gears with uniform tooth height are considered. An approach is proposed for the design of low-noise and localized bearing contact of such gears. The approach is based on the mismatch of contacting surfaces and permits two types of bearing contact either directed longitudinally or across the surface to be obtained. Conditions to avoid undercutting were determined. A Tooth Contact Analysis (TCA) was developed. This analysis was used to determine the influence of misalignment on meshing and contact of the spiral bevel gears. A numerical example that illustrates the theory developed is provided. Litvin, F. L. and Wang, A. G. Glenn Research Center...
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722618063
Category :
Languages : en
Pages : 52
Get Book Here
Book Description
Face-milled spiral bevel gears with uniform tooth height are considered. An approach is proposed for the design of low-noise and localized bearing contact of such gears. The approach is based on the mismatch of contacting surfaces and permits two types of bearing contact either directed longitudinally or across the surface to be obtained. Conditions to avoid undercutting were determined. A Tooth Contact Analysis (TCA) was developed. This analysis was used to determine the influence of misalignment on meshing and contact of the spiral bevel gears. A numerical example that illustrates the theory developed is provided. Litvin, F. L. and Wang, A. G. Glenn Research Center...
Author: F. L. Litvin
Publisher:
ISBN:
Category : Gearing, Bevel
Languages : en
Pages : 56
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Book Description
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781730849794
Category : Science
Languages : en
Pages : 84
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Book Description
A new method for design and generation of spiral bevel gears of uniform tooth depth with localized bearing contact and low level of transmission errors is considered. The main features of the proposed approach are as follows: (1) The localization of the bearing contact is achieved by the mismatch of the generating surfaces. The bearing contact may be provided in the longitudinal direction, or in the direction across the surface; and (2) The low level of transmission errors is achieved due to application of nonlinear relations between the motions of the gear and the gear head-cutter. Such relations may be provided by application of a CNC machine. The generation of the pinion is based on application of linear relations between the motions of the tool and the pinion being generated. The relations described above permit a parabolic function of transmission errors to be obtained that is able to absorb almost linear functions caused by errors of gear alignment. A computer code has been written for the meshing and contact of the spiral bevel gears with the proposed geometry. The effect of misalignment on the proposed geometry has also been determined. Numerical examples for illustration of the proposed theory have been provided. Litvin, F. L. and Zhao, X. Glenn Research Center...
Author: Faydor L. Litvin
Publisher:
ISBN:
Category : Gearing, Bevel
Languages : en
Pages : 204
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Book Description
Author: Faydor L. Litvin
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Book Description
Author: Faydor L. Litvin
Publisher:
ISBN:
Category : Computer-aided design
Languages : en
Pages : 79
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Book Description
Author: F. L. Litvin
Publisher:
ISBN:
Category :
Languages : en
Pages : 86
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Book Description
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722860585
Category :
Languages : en
Pages : 78
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Book Description
Research was performed to develop a computer program that will: (1) simulate the meshing and bearing contact for face milled spiral beval gears with given machine tool settings; and (2) to obtain the output, some of the data is required for hydrodynamic analysis. It is assumed that the machine tool settings and the blank data will be taken from the Gleason summaries. The theoretical aspects of the program are based on 'Local Synthesis and Tooth Contact Analysis of Face Mill Milled Spiral Bevel Gears'. The difference between the computer programs developed herein and the other one is as follows: (1) the mean contact point of tooth surfaces for gears with given machine tool settings must be determined iteratively, while parameters (H and V) are changed (H represents displacement along the pinion axis, V represents the gear displacement that is perpendicular to the plane drawn through the axes of the pinion and the gear of their initial positions), this means that when V differs from zero, the axis of the pionion and the gear are crossed but not intersected; (2) in addition to the regular output data (transmission errors and bearing contact), the new computer program provides information about the contacting force for each contact point and the sliding and the so-called rolling velocity. The following topics are covered: (1) instructions for the users as to how to insert the input data; (2) explanations regarding the output data; (3) numerical example; and (4) listing of the program. Litvin, Faydor L. and Zhang, YI and Chen, Jui-Sheng Unspecified Center...
Author: Faydor L. Litvin
Publisher:
ISBN:
Category :
Languages : en
Pages : 76
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Book Description
The main goal of this research project is to develop a computer program that will: (1) simulate the meshing and bearing contact for face-milled spiral bevel gears with given machine-tool settings, and (2) to obtain the output, some of the data is required for hydrodynamic analysis. It is assumed that the machine-tool settings and the blank data will be taken from the Gleason summaries. The theoretical aspects of the program are based on the theory that has been developed in the NASA Contractor Report 4342, AVSCOM Technical Report 90-C-028 entitled 'Local Synthesis and Tooth Contact Analysis of Face-Milled Spiral Bevel Gears', by Faydor L. Litvin and Yi Zhang. The difference between the computer programs developed in this report and the previous one is as follows: (1) the mean contact point of tooth surfaces for gears with given machine-tool settings must be determined iteratively, while two parameters (H and V) are changed. Parameter H represents the displacement along the pinion axis, and parameter V represents the gear displacement that is perpendicular to the plane drawn through the axes of the pinion and the gear of their initial positions. This means that when parameter V differs from zero, the axis of the pinion and the gear are crossed but not intersected. The method of local synthesis developed in the previous report provides conditions of exact contact of surfaces at the mean point. (2i) In addition to the regular output data (transmission errors and bearing contact), the new computer program provides information about the contacting force for each contact point, and the sliding and the so-called rolling velocity.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 60
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Book Description
A new approach for design, generation, and computerized simulation of meshing and contact of face-milled, formate cut spiral bevel gears is presented. The purpose is to develop a low noise, stabilized bearing contact for this type of gear drives. The approach proposed is based on application of three procedures that permit in sequence, to provide a longitudinally directed bearing contact, a predesigned parabolic function of transmission errors and limit the shift of bearing contact caused by errors of alignment. The theory developed is illustrated with an example of design and computation.
