Multi-objective optimization of hypoid gears to improve operating characteristics

Simon, Vilmos V.

doi:10.1016/j.mechmachtheory.2019.103727

Cited by 39 publications

(19 citation statements)

References 94 publications

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“…The optimal solutions are difficult to obtain complying with the minimization of all the four outcomes, hence in this case a composite desirability of 0.5 and may be taken as optimal results. Such similar condition has also been reported by Simon (2019) in multi-variable optimization using the Genetic Algorithm technique.…”

Section: Optimization Of Process Parameterssupporting

confidence: 85%

Experimental investigation for the effects of wire EDM process parameters over the tapered cross-sectional workpieces of titanium alloys (Ti6Al-4V)

et al. 2020

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Abstract. The main purpose of this research is to examine the outcomes of process parameters of Wire Electro-discharge Machining over the tapered workpieces of Titanium Alloy (Ti6Al-4V). Taper angle, current and pulse-off time are considered as the controllable factors effecting the response variables. Each sample has been cut with varying sets of machine controllable parameters to assess their effect on response variables; kerf width, wire wear, Material Removal Rate and surface roughness. Analysis of variances is applied, and mean Reponses are determined to recognize and compare the most influencing parameters over the response variables for the WEDM Process. Regression model for the response variables are also developed using which optimized WEDM process parameters are determined for the optimal response variables. It can be concluded that varying thickness of materials due to tapered cross section affects all the four-response variable, while, current and pulse-off time along with their interactions have high impact over the response variables.

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Section: Optimization Of Process Parameterssupporting

confidence: 85%

Experimental investigation for the effects of wire EDM process parameters over the tapered cross-sectional workpieces of titanium alloys (Ti6Al-4V)

et al. 2020

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“…Ease-off flank modification approaches were developed according to given transmission error and contact area for spiral bevel gear in [20][21][22]. Besides, in [23][24][25], multi-objective tooth optimization was carried out for spiral bevel gears and hypoid gear with modification-based LTCA to improve the overall meshing quality. According to [26], an approach of ease-off flank modification with three-segment parabolic transmission error tooth are developed for bevel gear.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis for Hypoid Gears with Ease-Off Flank Modification

et al. 2022

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An approach of ease-off flank modification for hypoid gears was proposed to improve the meshing performance of automobile drive axle. Firstly, a conjugate pinion matching with gear globally was developed based on gear meshing theory. Secondly, a modified pinion was represented by a sum of two vector functions determining the conjugate pinion and the normal ease-off deviations expressed by both predesigned transmission error function and tooth profile modification curves to change the initial contact clearance of the tooth. Thirdly, the best ease-off deviations were determined by optimizing the minimum amplitude of loaded transmission error (ALTE) based on tooth contact analysis (TCA) and loaded tooth contact analysis (LTCA). Finally, the results show that effective contact ratios (εe) are established by clearances both teeth space and of contact elliptical, and greatly affect ALTE. The εe is a variable value with increasing loads for the tooth with modification. ALTE decreases with increasing εe. After εe reaches the maximum, ALTE increases with increasing loads. The mismatch of the best ease-off tooth is minimal, which contributes to effective reduction in ALTE, thus significantly improving drive performance.

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“…15 After Pu et al 16 established the EHL model considering roughness of a spiral bevel gear, Zhang et al 17 predicted the coefficient of friction and tooth surface wear of this gear using TEHL technology. After establishing a TEHL model covering the full film, mixed, and boundary lubrication, Simon presented the methods to improve the lubrication performance of hypoid gear based on multi-objective optimization, 18 optimization of manufacture parameters, 19 and machine tool setting parameters. 20 Therefore, when analyzing the lubrication performances of VH-CATT cylindrical gears, the effects of the tooth surface roughness and the temperature rise cannot be ignored.…”

Section: Introductionmentioning

confidence: 99%

TEHL analysis of VH-CATT cylindrical gear transmission in elliptical contact considering time-varying parameters

Luo

Liang

et al. 2022

Advances in Mechanical Engineering

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The lubrication characteristics of a cylindrical gear transmission with a variable hyperbolic circular-arc-tooth-trace (VH-CATT) are important theoretical bases for the tribology design of the gear and its fatigue life prediction. Existing lubrication characteristics studies of it are based on simplified linear contact models, which are limited to one specific meshing position only. Therefore, the mathematical models for tooth contact analysis (TCA) and loaded tooth contact analysis (LTCA) are established to calculate most time-varying parameters in a meshing period, such as the kinematic parameters, spatial geometric parameters, and contact parameters, are calculated. Accordingly, a thermo-elastohydrodynamic lubrication (TEHL) model of an elliptical contact of this gear transmission is presented. Using all the proposed mathematical models, the TEHL results with smooth and rough tooth surfaces in a meshing period are analyzed. The obtained results reveal that these models can be used to predict the distribution of the film thickness, pressure, and temperature rise on the smooth and rough tooth surfaces of VH-CATT cylindrical gear transmission in each contact area of a meshing period. And it shows that the time-varying parameters have great influences on lubrication performance. Furthermore, the lubrication mechanism in a meshing period is investigated systematically in VH-CATT cylindrical gear transmission.

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Multi-objective optimization of hypoid gears to improve operating characteristics

Cited by 39 publications

References 94 publications

Experimental investigation for the effects of wire EDM process parameters over the tapered cross-sectional workpieces of titanium alloys (Ti6Al-4V)

Experimental investigation for the effects of wire EDM process parameters over the tapered cross-sectional workpieces of titanium alloys (Ti6Al-4V)

Design and Analysis for Hypoid Gears with Ease-Off Flank Modification

TEHL analysis of VH-CATT cylindrical gear transmission in elliptical contact considering time-varying parameters

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