Tooth Surface Contact Fatigue Reliability Analysis of Cycloidal Gear Based on Monte-Carlo

All sorts of design variables and parameters are often regarded as fixed values in the traditional design, it cannot describe quantitatively how well the products are safe. It is necessary to make a reliability analysis of cycloidal gear, which is the key part of FA pin-cycloidal transmission, this paper uses Monte-Carlo method to simulate and test the distribution laws of the contact stress and the contact fatigue strength of cycloidal gear, which indicates that the contact stress obeys the normal distribution and the contact fatigue strength obeys the lognormal distribution, besides, makes a sensitivity analysis of the random parameters, all these work lay the foundation for the reliability analysis of the whole reducer.

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Improvement of Contact Fatigue Strength of Caburized Gears by Tooth surface Modification Processing

The Proceedings of the Symposium on Motion and Power Transmission ◽

10.1299/jsmempt.2004.159 ◽

2004 ◽

Vol 2004 (0) ◽

pp. 159-162

Author(s):

Yong CHEN ◽

Akihiro YAMAMOTO ◽

Katsuyuki OMORI

Keyword(s):

Surface Modification ◽

Fatigue Strength ◽

Contact Fatigue ◽

Tooth Surface ◽

Contact Fatigue Strength ◽

Tooth Surface Modification

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Analytical Calculation of the Tooth Surface Contact Stress of Cylindrical Gear with Variable Hyperbolic Circular-Arc-Tooth-Trace

Symmetry ◽

10.3390/sym12081318 ◽

2020 ◽

Vol 12 (8) ◽

pp. 1318

Author(s):

Yongqiao Wei ◽

Rui Guo ◽

Yongping Liu ◽

Changbin Dong ◽

Dawei Li ◽

...

Keyword(s):

Contact Stress ◽

Contact Fatigue ◽

Tooth Surface ◽

Element Analysis ◽

Cylindrical Gear ◽

Circular Arc ◽

Contact Fatigue Strength ◽

Maximum Contact Stress ◽

Tooth Width ◽

Maximum Contact

In order to theoretically research the tooth surface maximum contact stress of a Cylindrical Gear with Variable Hyperbolic Circular-Arc-Tooth-Trace (VH-CATT), the computing formula of maximum contact stress of VH-CATT cylindrical gear is investigated according to Hertz formula in this paper. Insufficient contact fatigue strength will lead to pitting corrosion, plastic deformation of tooth surface and other damages. Therefore, the maximum contact stress of tooth surface must be carried out. The contact stress calculation formula is particularly considering the effect of normal force, total carrying length, synthetical curvature radius, and position angle. The present work establishes analytical solutions to research the effect of different parameters for the contact stress of VH-CATT cylindrical gear incorporating elastic deformation on the tooth surface, and which have shown that the different module, transmission ratio, pressure angle, tooth width, and the cutter head radius have a crucial effect on the contact stress and contact ellipse of VH-CATT cylindrical gear along the tooth width direction. Moreover, a finite element analysis is carried out to verify the correctness of the theoretical computing formula of contact stress of VH-CATT cylindrical gear. By contrast with the theoretical calculated value and the stress value of finite element analysis, its error is very small. It is indicated that the derived formula of contact fatigue strength of VH-CATT cylindrical gear has high accuracy and can accurately reflect the real contact stress value of tooth surface, which is beneficial for research on tooth break reduction, pitting, wear resistance and fatigue life improvement of the VH-CATT cylindrical gear. The study results also have a certain reference value for the design and check calculation of the VH-CATT cylindrical gear.

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Reliability Analysis on Gear Contact Fatigue Strength Considering the Effect of Tolerance

The Open Mechanical Engineering Journal ◽

10.2174/1874155x01408010630 ◽

2014 ◽

Vol 8 (1) ◽

pp. 630-635 ◽

Cited By ~ 2

Author(s):

Guowei Li ◽

Weijian Mi ◽

Kailiang Lu ◽

Weiguo Zhang

Keyword(s):

Finite Element ◽

Fatigue Strength ◽

Reliability Analysis ◽

Gear Tooth ◽

Contact Fatigue ◽

Tolerance Allocation ◽

Product Performance ◽

Gear Pump ◽

Contact Fatigue Strength ◽

Gear Contact

Tolerance allocation influences product performance especially for miniature precise assembly device. The purpose of this paper is to explore an approach to optimize manufacturing tolerances by combining the reliability of product performance indicators under actual working condition. The paper describes the principle and ways of tolerance handling in the finite element control equations for the displacement and stress, and then introduces the implementation of Monte-Carlo Finite Element Analysis method. We illustrate this method on a gear-tooth of port-cleaning-equipment gear pump and carry out the reliability analysis on gear contact fatigue strength considering the effect of manufacturing tolerance, and a sensitivity analysis is also performed to identify the key tolerances and improve them in order to attain the expected reliability.

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