Design Technique Research of Fine-Forged Spur Bevel Gear Tooth Profile Modification

2010 ◽  
Vol 443 ◽  
pp. 170-176
Author(s):  
Huan Yong Cui ◽  
Xi Jie Tian ◽  
Dong Liang Wang
Keyword(s):  
Gear Tooth ◽  
Main Tool ◽  
Tooth Profile ◽  
Bevel Gear ◽  
Practical Calculation ◽  
Profile Modification ◽  
Basic Criterion ◽  
Tooth Profile Modification ◽  
Tooth Roots ◽  
Gear Profile

Gear tooth profile modification can be featured to improve working stability of gear equipments, abate noise and vibration, enhance loading ability and prolong usage life of the gears. Fine forged spur bevel gear are formed with molds, so it is economical to modify the gears by means of modifying mold cavity. Whether the modified gears can be separated from the mold with easiness is proposed to be the basic criterion of gear tooth profile modification design. Near the big ends and tooth roots is mainly the area which affects demolding after modification. According to the modified gear configuration, mathematical model is built to calculate the demolding check at any modification points on the fine forged spur bevel gear profile. And a corresponding program is developed, which is the main tool for the gear tooth profile modification design, and practical calculation has carried out.

Optimization of Involute Gear Tooth Profile Modification for Tooth Scoring Reduction

1992 ◽  
Author(s):  
Prokop S'roda ◽  
Ronald L. Huston
Keyword(s):  
Bearing Capacity ◽  
Gear Tooth ◽  
Tooth Profile ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Profile Modification ◽  
Design Charts ◽  
Tooth Profile Modification ◽  
Involute Gear

Abstract This paper presents a method for determining optimum involute tooth profile modifications to reduce scoring and to increase load bearing capacity. The method is based upon Bloks theory of lubrication and wear. The method leads to design charts incorporating common geometrical gearing parameters. An example is presented.

Slotting Profile Modification Technology and Generating Simulation’s MATLAB Implementation for Heavy-Loading Mine Gear

2011 ◽  
Vol 328-330 ◽  
pp. 574-578
Author(s):  
Liang Bin Hu ◽  
Sheng Li ◽  
Feng Wei Yuan ◽  
Bi Wen Li ◽  
Cong Gui Chen
Keyword(s):  
Adaptive Design ◽  
Gear Tooth ◽  
Tooth Profile ◽  
Profile Modification ◽  
Engagement Theory ◽  
Tooth Profile Modification ◽  
Matlab Implementation

Slotting process used to achieve modify heavy-loading mine gear.According to the pitch circle radius of gear tooth profile modification is difficult to accurately draw, reverse-designed the profile of the modification slotting cutter fold may occur on the cusp, generating simulation for slotting profile modification is implemented using MATLAB based on engagement theory of slotting process,which can test whether the pitch circle is set to reasonable, to avoid resulting the top or root of conjugate gear’s profiles be cut,achieved the adaptive design of profile modification slotting cutter.

A Study on Planetary Gear Dynamics With Tooth Profile Modification

2011 ◽  
Author(s):  
Cheon-Jae Bahk ◽  
Robert G. Parker
Keyword(s):  
Dynamic Response ◽  
Gear Tooth ◽  
Planetary Gear ◽  
Transmission Error ◽  
Tooth Profile ◽  
Peak Amplitude ◽  
Profile Modification ◽  
Tooth Profile Modification ◽  
Static Transmission Error ◽  
The Impact

This study investigates the impact of tooth profile modification on planetary gear dynamic response. Micro-scale geometric deviations from an involute gear tooth profile add an additional excitation source, potentially reducing gear vibration. In order to take account of the excitation, tooth profile modification is included in an analytical planetary gear model. Nonlinearity due to tooth contact loss is considered. Time-varying mesh stiffness and both rotational and translational gear motions are modeled. The accuracy of the proposed model for dynamic analysis is correlated against a benchmark finite element analysis. Perturbation analysis is employed to obtain a closed-form approximation of planetary gear dynamic response with tooth profile modification. Mathematical expressions from the perturbation solution allow one to easily estimate the peak amplitude of resonant response using known parameters. Variation of the peak amplitude with the amount and the length of profile modification illustrates the effect of tooth profile modification on planetary gear dynamic response. For a given external load, the tooth profile modification parameters for minimal response are readily obtained. Static transmission error and dynamic response are minimized at different amounts of profile modification, which contradicts common practical thinking regarding strong correlation between static transmission error and dynamic response. Contrary to the expectation of further reduced vibration, the combination of the optimum sun-planet and ring-planet mesh tooth profile modifications that minimizes response when applied individually increases dynamic response.

The Tooth Profile Modification in Gear Manufacture

2007 ◽  
Vol 10-12 ◽  
pp. 317-321 ◽  
Author(s):  
Zheng Li ◽  
K. Mao
Keyword(s):  
Gear Tooth ◽  
Dynamic Performance ◽  
Transmission Error ◽  
Tooth Profile ◽  
Noise And Vibration ◽  
Profile Modification ◽  
Tooth Profile Modification ◽  
Manufacture Process ◽  
Static Performance ◽  
Noise Vibration

The gear design always be focus on analyzing the static performance (strength, stress, friction) and dynamic performance (inertia, noise, vibration), and especially for dynamic, the noise and vibration of gear are big problems. Actually, the main reason of noise and vibration is transmission error between master and slave gears, but the error must exist in any manufacture process. To decrease harmful noise and vibration, the most effective method is “tooth profile modification”, which is by tip relief or root relief for modifying geometry profile of gear tooth to regulate transmission error. In the paper, the transmission error of original model and modified model will be compared to show the gear profile modification will influence the transmission error obviously.

Theoretical Research on Tooth Profile Modification with Electroplated CBN Hard Honing Wheels

2008 ◽  
Vol 375-376 ◽  
pp. 226-230 ◽  
Author(s):  
Man Dong Zhang ◽  
Ming Lv ◽  
Sheng Qiang Yang
Keyword(s):  
Gear Tooth ◽  
Variable Parameter ◽  
Tooth Profile ◽  
Theoretical Research ◽  
Control Points ◽  
Profile Modification ◽  
Spline Curve ◽  
Tooth Profile Modification ◽  
Tooth Surfaces ◽  
And Control

Using plated CBN hard honing wheels with standard involute tooth profiles, there will be the middle concave error around pitch circle on the machined gear tooth surfaces. Therefore, standard involute tooth profiles of honing wheels have to be modified properly before electroplating CBN. In the paper, aiming at the tooth profile modification of honing wheels, the standard involute curve was converted into a spline curve, and control points of the spline curve were parameterized in solid modeling of honing wheels. By the Pro/E and ANSYS Workbench software, the engaging situation between honing wheel and gear was analyzed. Based on the analysis results, assuming the control points around pitch circle were set as variable parameter, and basically equal contact pressures were set as response variable parameter, the tooth surfaces of hard honing wheels were properly corrected, it was proved useful to reduce or eliminate middle concave error in practice.

Modeling of surface roughness in a novel magnetorheological gear profile finishing process

2020 ◽  
pp. 095440622097826
Author(s):  
Ravi Datt Yadav ◽  
Anant Kumar Singh ◽  
Kunal Arora
Keyword(s):  
Surface Roughness ◽  
Gear Tooth ◽  
Surface Characteristics ◽  
Spur Gear ◽  
Tooth Profile ◽  
Tooth Surface ◽  
Magnetic Flux Density ◽  
Element Analysis ◽  
Finishing Process ◽  
Gear Profile

Fine finishing of spur gears reduces the vibrations and noise and upsurges the service life of two mating gears. A new magnetorheological gear profile finishing (MRGPF) process is utilized for the fine finishing of spur gear teeth profile surfaces. In the present study, the development of a theoretical mathematical model for the prediction of change in surface roughness during the MRGPF process is done. The present MRGPF is a controllable process with the magnitude of the magnetic field, therefore, the effect of magnetic flux density (MFD) on the gear tooth profile has been analyzed using an analytical approach. Theoretically calculated MFD is validated experimentally and with the finite element analysis. To understand the finishing process mechanism, the different forces acting on the gear surface has been investigated. For the validation of the present roughness model, three sets of finishing cycle experimentations have been performed on the spur gear profile by the MRGPF process. The surface roughness of the spur gear tooth surface after experimentation was measured using Mitutoyo SJ-400 surftest and is equated with the values of theoretically calculated surface roughness. The results show the close agreement which ranges from −7.69% to 2.85% for the same number of finishing cycles. To study the surface characteristics of the finished spur gear tooth profile surface, scanning electron microscopy is used. The present developed theoretical model for surface roughness during the MRGPF process predicts the finishing performance with cycle time, improvement in the surface quality, and functional application of the gears.

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