Study on Tooth Surface Strength of Spur Gears—Part I: Experimental Procedure and Determination of Tooth Surface Strength©

AbstractThis work describes a newly introduced experimental procedure to quantify the diffusion progress of mineral oils locally resolved in NBR. Diffusion of reference oils IRM 901, IRM 902 and IRM 903 in NBR with various acrylonitrile contents was investigated. Classical sorption experiments were performed as a basic characterization and compared to the newly introduced method. Here, elastomer specimens are only being dipped with the bottom in a relatively small reservoir of mineral oil. This provides a determination of locally resolved concentration profiles of mineral oils, and the calculation of diffusion coefficients. These diffusion coefficients follow the same trends like those determined via sorption experiments. Despite differences in the absolute numbers, activation energies of diffusion can be applied as a suitable measure for the compatibility of elastomers and fluids.

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Duplex Spread Blade Method for Cutting Hypoid Gears with Modified Tooth Surface

Journal of Mechanical Design ◽

10.1115/1.2829171 ◽

1998 ◽

Vol 120 (3) ◽

pp. 441-447 ◽

Cited By ~ 4

Author(s):

K. Kawasaki ◽

H. Tamura

Keyword(s):

Cutting Edge ◽

Tooth Surface ◽

Radius Of Curvature ◽

Large Radius ◽

Ring Gear ◽

Circular Arc ◽

Hypoid Gears ◽

Manufacturing Method ◽

Straight Line

In this paper, a duplex spread blade method for cutting hypoid gears with modified tooth surface is proposed. The duplex spread blade method provides a rapid and economical manufacturing method because both the ring gear and pinion are cut by a spread blade method. In the proposed method, the nongenerated ring gear is manufactured with cutting edge that is altered from the usual straight line to a circular arc with a large radius of curvature and the circular arc cutting edge produces a modified tooth surface. The pinion is generated by a cutter with straight cutting edges as usual. The main procedure of this method is the determination of the cutter specifications and machine settings. The proposed method was validated by gear manufacture.

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Determination of the pore size of woven structures through image analysis

Open Engineering ◽

10.2478/s13531-011-0045-2 ◽

2012 ◽

Vol 2 (1) ◽

Cited By ~ 5

Author(s):

R. Angelova

Keyword(s):

Pore Size ◽

Single Layer ◽

Woven Fabric ◽

Virtual Model ◽

Experimental Procedure ◽

Porosity And Permeability ◽

Woven Structures ◽

Woven Structure ◽

Non Destructive

AbstractThe paper presents an experimental procedure developed for determination of the pore size, shape and distribution in a single layer woven fabric, for the construction of a virtual model to be incorporated in a future CFD software package. The procedure is based on non-destructive observation and analysis of woven samples. 14 different samples of gray fabrics of 100 % cotton in plain and twill weaves are investigated. The results obtained allow the creation of reality more realistic virtual model of the woven structure, and theoretical investigation of its porosity and permeability through computer simulation.

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