GDS-1 ROBUST DESIGN OF HYPOID GEAR TOOTH SURFACE(GEAR DESIGN AND SYNTHESIS)

According to the hypoid gear tooth surface forming principle, a generating-line will be formed in round-plane while a cone and its tangent circle plane do pure rolling, and the hypoid gear is cutting according to the motion equation as hypoid gears generating-line. to tools shape. The milling processing equation of the hypoid left-hand gear tooth surface on the right side gear tooth surface and on the left side gear tooth surface.There are a detailed description of the adjusting-tool , cutting out from ends, dividing, cycle cutting the whole process. The above method can realizes hypoid gearwheel right tooth surface processing.

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An Ease-Off Based Method for Loaded Tooth Contact Analysis of Hypoid Gears Having Local and Global Surface Deviations

Journal of Mechanical Design ◽

10.1115/1.4001722 ◽

2010 ◽

Vol 132 (7) ◽

Cited By ~ 47

Author(s):

M. Kolivand ◽

A. Kahraman

Keyword(s):

Gear Tooth ◽

Contact Analysis ◽

Tooth Surface ◽

Hypoid Gear ◽

Tooth Contact Analysis ◽

Tooth Contact ◽

Hypoid Gears ◽

Surface Deviations ◽

Tooth Surfaces ◽

Loaded Tooth Contact Analysis

Actual hypoid gear tooth surfaces do deviate from the theoretical ones either globally due to manufacturing errors or locally due to reasons such as tooth surface wear. A practical methodology based on ease-off topography is proposed here for loaded tooth contact analysis of hypoid gears having both local and global deviations. This methodology defines the theoretical pinion and gear tooth surfaces from the machine settings and cutter parameters, and constructs the surfaces of the theoretical ease-off and roll angle to compute for the unloaded contact analysis. This theoretical ease-off topography is modified based on tooth surface deviations and is used to perform a loaded tooth contact analysis according to a semi-analytical method proposed earlier. At the end, two examples, a face-milled hypoid gear set having local deviations and a face-hobbed one having global deviations, are analyzed to demonstrate the effectiveness of the proposed methodology in quantifying the effect of such deviations on the load distribution and the loaded motion transmission error.

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Failure Analysis and Preventive Measures of Cooling Tower Fan Gearbox

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.989-994.3302 ◽

2014 ◽

Vol 989-994 ◽

pp. 3302-3305

Author(s):

Jian Ping Chen ◽

Ya Li Wang ◽

Chun Xiao Zhao ◽

Xing Li

Keyword(s):

Failure Analysis ◽

Cooling Tower ◽

Preventive Measures ◽

Gear Tooth ◽

Fault Analysis ◽

Tooth Surface ◽

Fatal Accidents ◽

Gear Design

To avoid fatal accidents caused by premature gear failure of cooling tower fan, research and analysis of gear tooth surface pitting and tooth breakage which are the two main failure forms of cooling tower fan gear are conducted in this article, the specific reasons of the fan gear failure are got, and corresponding suggestions of improvements and preventive measures are put forward, this can be taken as reference to the gear design and fault analysis.

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Contact Analysis of Tooth Surface in Gear Meshing Based on Infrared Ray Imagery

Materials Science Forum ◽

10.4028/www.scientific.net/msf.773-774.563 ◽

2013 ◽

Vol 773-774 ◽

pp. 563-572

Author(s):

Kouji Nakajima ◽

Toshiki Hirogaki ◽

Eiichi Aoyama ◽

Masaki Nagata

Keyword(s):

Surface Temperature ◽

Temperature Rise ◽

Gear Tooth ◽

Tooth Surface ◽

Geometrical Theory ◽

Hypoid Gear ◽

Surface Accuracy ◽

Important Challenge ◽

Red Lead ◽

Improving Accuracy

Improving accuracy ofthe gear tooth surface has become an important challenge, because the toothsurface accuracy greatly influences vibration of gears. However, for the spiralbevel gear, the tooth surface accuracy is considered to be very difficult toevaluate because the geometrical theory is difficult. Generally, the managementof tooth surface accuracy has conventionally been substituted by the toothsurface contact evaluation with red lead, which is a kind of paint. However,the results of visual examinations are too subjective. We therefore focused onthe infrared ray imagery to investigate the gear tooth meshing. In this research,a high response infrared thermography was used to estimate the tooth contact ofa hypoid gear under running conditions. Specifically, we looked at the increasein temperature on the tooth surface caused by gear meshing. The results clearlyshowed that the temperature was affected by load, sliding speed between toothsurfaces, and the average peripheral speed of tooth surface. We also proposedan equation that predicts tooth surface temperature rise and showed its utility.Thus, the proposed method effectively evaluates the tooth surface accuracy ofhypoid gear.

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Generation of Hypoid Gears on CNC Hypoid Generator

Journal of Mechanical Design ◽

10.1115/1.4005232 ◽

2011 ◽

Vol 133 (12) ◽

Cited By ~ 15

Author(s):

Vilmos V. Simon

Keyword(s):

Gear Tooth ◽

Velocity Ratio ◽

Transmission Error ◽

Tooth Surface ◽

Polynomial Functions ◽

Gear Pair ◽

Hypoid Gear ◽

Kinematic Scheme ◽

Hypoid Gears ◽

Fifth Order

In this study, polynomial functions of orders up to five are applied to induce variations in the cradle radial setting and the velocity ratio in the kinematic scheme of the machine tool for the generation of the pinion tooth surfaces corresponding to reduced transmission error amplitudes of a hypoid gear pair. The new CNC hypoid generators have made it possible to perform this nonlinear correction motions for the cutting of the face-milled hypoid gears. An algorithm is developed for the execution of motions on the CNC hypoid generator for the generation of face-milled hypoid gear tooth surface, based on the machine tool setting variation on the cradle-type hypoid generator induced by the optimal polynomial functions up to fifth-order. By using the corresponding computer program, the motion graphs of the CNC hypoid generator are determined for the generation of hypoid gear tooth surface, based on the optimal variation in the velocity ratio in the kinematic scheme and on the variation in the cradle radial setting on a cradle-type generator. The results presented indicate that the variation of the velocity ratio in the kinematic scheme of the hypoid generator induced by a fifth-order polynomial function resulted in a 62% reduction of the maximum transmission error of the gear pair.

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Computerized Modeling and CNC Machining Simulation of Spiral Bevel Gear

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.482-484.1081 ◽

2012 ◽

Vol 482-484 ◽

pp. 1081-1084

Author(s):

Wen Jin Wang ◽

Zhi Qiang Zhang ◽

Jing Zhang ◽

Jian Zhao ◽

Ling Li Zhang ◽

...

Keyword(s):

Mathematical Model ◽

Differential Geometry ◽

Gear Tooth ◽

Bevel Gear ◽

Cnc Machining ◽

Tooth Surface ◽

Spiral Bevel Gear ◽

Hypoid Gear ◽

Machining Simulation ◽

Spiral Bevel

Based on the theory of gearing and differential geometry, a CNC hypoid generator mathematical model for spiral bevel has been developed. A mathematical model of a spiral bevel gear-tooth surface based on the CNC Gleason hypoid gear generator mechanism is proposed in the paper. The simulation of the spiral bevel gear is presented according to the developed machining mathematical model. A numerical example is provided to illustrate the implementation of the developed mathematic models.

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Identification of the Machine Settings of Real Hypoid Gear Tooth Surfaces

Journal of Mechanical Design ◽

10.1115/1.2829170 ◽

1998 ◽

Vol 120 (3) ◽

pp. 429-440 ◽

Cited By ~ 40

Author(s):

C. Gosselin ◽

T. Nonaka ◽

Y. Shiono ◽

A. Kubo ◽

T. Tatsuno

Keyword(s):

Manufacturing Industry ◽

Gear Tooth ◽

Computer Software ◽

Tooth Surface ◽

Hypoid Gear ◽

Gear Teeth ◽

Tooth Surfaces ◽

Gear Manufacturing ◽

Pattern Development ◽

Cutting Processes

In the spiral bevel and hypoid gear manufacturing industry, master gear sets are usually developed from initial machine settings obtained from computer software or instruction sheets. These initial machine settings are then modified until a satisfactory bearing pattern is obtained, a process called bearing pattern development. Once a satisfactory bearing pattern is obtained, manufacturing errors and heat treatment distorsions can be accounted for by proportionally changing the machine settings according to the results of a V-H test in which the pinion vertical and horizontal positions are modified until the bearing pattern is acceptable. Once a satisfactory combination of master pinion and gear is obtained, their actual tooth surfaces usually do not correspond to those of the initial theoretical model, and the theoretical pinion and gear surface definitions are unknown. This paper presents a computer algorithm used to identify the machine settings producing a theoretical tooth surface closest to that of a measured surface, what the authors call Surface Match, in order to effectively simulate the kinematical behavior of real gear teeth. The approach is applicable to both 1st and 2nd order surface errors, including profile deviation, for any cutting process. However, given the availability of experimental data for the Fixed Setting™, Formate™ and Helixform™ cutting processes, the examples presented in the paper are related to these cutting processes.

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