Preliminary Study on the Rotational Indexing Machining Technology of Straight Bevel Gear

2012 ◽  
Vol 217-219 ◽  
pp. 1650-1654
Author(s):  
Jia Li ◽  
Wen Meng ◽  
Jiang Shi
Keyword(s):  
Numerical Simulation ◽  
Mathematical Method ◽  
Mathematical Models ◽  
Bevel Gear ◽  
Tooth Surface ◽  
Curve Segment ◽  
Straight Bevel Gear ◽  
Straight Line ◽  
Preliminary Study ◽  
Cutting Point

Aiming at the disadvantages of intermittent indexing in the existing straight bevel gear machining methods, a continuous indexing machining method is proposed based on the principle of cycloid rotational indexing. The principle of rotational indexing machining of straight bevel gear is explained by the mathematical method of the space curve approximating straight line. On this basis, the mathematical models of forming motions are established. The relations of useful parameters are built with these models, and then the cutting point trajectory is obtained. The parameters are adjusted according to the approximation straightness of curve segment to generatrix on tooth surface. By means of calculation and numerical simulation of an example, the feasibility of the rotational indexing machining method for straight bevel gear is proved.

Tooth Surface Contact Stress Analysis of the Straight Bevel Gear Axial Practice

2013 ◽  
Vol 401-403 ◽  
pp. 345-349
Author(s):  
Jia Jia Lou ◽  
Xue Mei Cao ◽  
Ji Song Jiao
Keyword(s):  
Stress Analysis ◽  
Contact Stress ◽  
Bevel Gear ◽  
Tooth Surface ◽  
Element Analysis ◽  
Surface Distribution ◽  
Straight Bevel Gear ◽  
Static Contact ◽  
Contact Models ◽  
Grid Nodes

The program of tooth surface and gear inside grid nodes is developed according to the tooth surface equation. Finite Element Analysis of the straight bevel gear axial practice model is established. Order flow contact models of the three teeth and contact pair of gears of the three teeth is developed by APDL language of ANSYS. The static contact stress analysis of axial practice is constructed. The static contact stress of tooth surface distribution and change rule is obtained by calculating. The result shows that axial practice pair of gears of have good meshing performance.

Generation and TCA of Straight Bevel Gear Drive with Modified Geometry

2011 ◽  
Vol 86 ◽  
pp. 403-406 ◽  
Author(s):  
Ji Song Jiao ◽  
Xue Mei Cao
Keyword(s):  
Point Contact ◽  
Longitudinal Direction ◽  
Bevel Gear ◽  
Tooth Surface ◽  
Tooth Contact Analysis ◽  
Bevel Gears ◽  
Straight Bevel Gear ◽  
Bearing Contact ◽  
Tooth Surfaces ◽  
Gear Drives

In order to reduce the sensitivity of straight bevel gear drives to misalignment, a new geometry of such gear drives is proposed in longitudinal direction. Point contact instead of line contact of tooth surfaces is achieved by longitudinal crowning of pinion tooth surface. The tooth surface modeling and tooth contact analysis (TCA) of straight bevel gear drives have been established. TCA program of a pair of straight bevel gears was performed in MATLAB and tooth bearing contact and transmission errors were obtained.

scholarly journals Methodology of Designing the Geometry of the Bevel Gear Using Numerical Simulation to Generate the Teeth Flank Surfaces

2014 ◽  
Vol 8 (1) ◽  
pp. 5-8
Author(s):  
Jadwiga Pisula ◽  
Mieczysław Płocica
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Theoretical Basis ◽  
Bevel Gear ◽  
Tooth Surface ◽  
Surface Geometry ◽  
Gear Design ◽  
Grid Points ◽  
The Mathematical Model

Abstract The present paper describes modern methodology of the bevel gear design with a particular focus on issues concerning the theoretical basis and the preparation of the numerical simulation of the machining. The assumptions used in developing the mathematical model of cutting teeth are given and an example of the teeth flank surfaces of a gear and a pinion resulting from the virtual processing is shown. The correctness of the mathematical model of cutting teeth was verified by comparing the resulting based on the model grid points, the side of the tooth surface, resulting from the simulation cutting teeth in CAD. A high convergence of the two surface geometry was demonstrated, which allows for the use of the analysis for each of the models independently.

Research on Plasticity Shaped Technology of Rear Axle Gear of Motorcar

2012 ◽  
Vol 468-471 ◽  
pp. 2633-2636
Author(s):  
Jin Wei Yu
Keyword(s):  
Production Efficiency ◽  
Rear Axle ◽  
New Technology ◽  
Economic Benefits ◽  
Bevel Gear ◽  
Tooth Surface ◽  
Straight Bevel Gear ◽  
Angle Effect ◽  
Rough Milling ◽  
Material Utilization

Rear axle spiral bevel gear of motorcar, as its special shape structure , alveolar much deeper than straight bevel gear , and has spiral angle effect , therefore, extrusion of rear axle gear than extrusion of straight bevel gear is much more difficult , deal with the problems, have made closed extrusion new technology of rear axle gear , designed new type die structure, die adopt fluctuateing concave model level bisection ， pre-stressed composite concave model structure , concave model and model core floating , parts have no fly side , tooth surface can reach the level of rough milling ,higher production efficiency and life of die , satisfied production requirements. Process test showed that compared with the open die , required extrusion distortion force reduced 50% , increase material utilization 15%, debase electric power consumption 50%, with significant economic benefits .

The Method of Accurate Variable Curvature Crowning of Involute Straight Bevel Gear

2013 ◽  
Vol 712-715 ◽  
pp. 1705-1713
Author(s):  
Fang You Zhang ◽  
Xi Jie Tian ◽  
Huan Yong Cui ◽  
Tai Ran Liu
Keyword(s):  
Parametric Modeling ◽  
Bevel Gear ◽  
Tooth Surface ◽  
Target Variable ◽  
Bevel Gears ◽  
Straight Bevel Gear ◽  
Variable Curvature ◽  
Modification Effect ◽  
Element Simulation

Involute straight bevel gear pair often appears the phenomenons of meshing interference, impact and "end contact" in the course of meshing. Usually, symmetrical crowning is adopted to improve above phenomenons, however, due to the influence of complicated tooth loads and other complicated factors, the symmetrical crowned gear may not reach a good modification effect. In this paper, we adopt target variable curvature crowning according to the specific conditions of bevel gears in order to obtain good modification effect, nevertheless, because of the complexity of the variable curvature crowning, the conventional method of using space spherical involute stretch and sweep standard gear model to remove tooth surface materials has been unable to meet the accurate requirements of the variable curvature crowned model, at the same time, this method can not realize parametric modeling of modification bevel gear. Therefore, this paper puts forward an easy to realize parametric modeling method of accurate variable curvature crowning for involute straight bevel gear based on ANSYS/LS-DYNA, Imageware, Matlab and Solidworks. This method can realize the accurate modeling for variable curvature crowned involute straight bevel gear and ensure the accuracy of modification gears and follow-up finite element simulation, meanwhile, it provides theoretical basis for parametric modeling of variable curvature crowned involute straight bevel gear. Finally, the superiority of variable curvature crowning is tested through numerical simulation under specific conditions.

scholarly journals Computerized Generation of Asymmetric Straight Bevel Gear

2021 ◽  
Vol 1094 (1) ◽  
pp. 012084
Author(s):  
Adil Habeeb Hashim ◽  
Mohammad Qasim Abdullah
Keyword(s):  
Bevel Gear ◽  
Straight Bevel Gear

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

1998 ◽  
Vol 120 (3) ◽  
pp. 441-447 ◽  
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.

New Geometry of Generating Spiral Bevel Gear

2007 ◽  
Author(s):  
Kaihong Zhou ◽  
Jinyuan Tang ◽  
Tao Zeng
Keyword(s):  
Gear Tooth ◽  
Previous Method ◽  
Bevel Gear ◽  
Tooth Surface ◽  
Spiral Bevel Gear ◽  
Surface Geometry ◽  
Numerical Examples ◽  
Cone Surface ◽  
Spiral Bevel ◽  
Involute Curve

New geometry of generating spiral bevel gear is proposed. The key idea of the new proposed geometry is that the gear tooth surface geometry can be investigated in a developed curved surface based on the planar engagement principle. It is proved that the profile curve on the back of generating cone surface is a conical involute curve. The equations of generated gear tooth surface are achieved by the conical involute curve sweeping along the tooth trace of gear. The obtained equations are explicit and independent of the machine-tool settings. This differs from previous studies. The developed theory is illustrated with numerical examples to compare with the previous method, the comparison approves that the method is possible in this way. The new method indicates that there are new solutions to the design the production of spiral bevel gear.

The Calculation Method of Accurate Shaping Curve of Inside Right-Angle Step in Cross Wedge Rolling

2010 ◽  
Vol 37-38 ◽  
pp. 1416-1420 ◽  
Author(s):  
Ran Zhao ◽  
Kang Sheng Zhang ◽  
Zheng Huan Hu
Keyword(s):  
Numerical Simulation ◽  
Mathematical Models ◽  
Contact Zone ◽  
Calculation Method ◽  
Cross Wedge Rolling ◽  
Forming Process

Deep study on Inside Right-angle Step (IRS) forming process was conducted to improve the precision of its (IRS) forming. According to its actual forming process, the zone, or the undeformed zone, was looked as semi-spiral declined cone and excluded the contact zone. A new algorithm was developed for calculating the size of the undeformed zone. More simple mathematical models and expressions weredeveloped for solving the shaping curve. The model was verified in terms of its simplicity and correctness based on the numerical simulation.

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