Rapid hob tip corner optimization of spur gears for increasing bending strength

Dong, Peng; Zuo, Shumiao; Tenberge, Peter; Uelpenich, Ray; Xu, Xiangyang; Liu, Yanfang; Wang, Shuhan; Lai, J.

doi:10.1016/j.ijmecsci.2022.107322

Cited by 12 publications

(4 citation statements)

References 54 publications

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“…As an important part, gear-transmission-systems (GTSs) are used in the various transmission machinery [1,2,3]. The GTSs consist of shafts, rolling bearing, and gears.…”

Section: Introductionmentioning

confidence: 99%

Dynamic modeling and vibration analysis of a flexible gear transmission system

Liu

Xia

2023

Mechanical Systems and Signal Processing

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“…As an important part, gear-transmission-systems (GTSs) are used in the various transmission machinery [1,2,3]. The GTSs consist of shafts, rolling bearing, and gears.…”

Section: Introductionmentioning

confidence: 99%

Dynamic modeling and vibration analysis of a flexible gear transmission system

Liu

Xia

2023

Mechanical Systems and Signal Processing

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“…All gears throughout this work will be considered undercut -free and therefore the actual tooth root width will be increased compared to that of equation (2). Considering S 0 = pm/2 (where (m) is the module) then it is obvious from equation (2) that each involute section of the gear tooth gets thicker as the pressure angle increases since the local curvature angle a x decreases with the increase of a 0 as shown in equation (3).…”

Section: High Pressure Angle Modellingmentioning

confidence: 99%

“…The most common calculations concerning the strength of gear teeth include the determination of the contact induced flank stresses as well the tooth root bending stresses as per the international standards of ISO 6336 Part 2 and 3 respectively. 1,2 Both areas have long been the subject of intense scientific research focusing on the indirect minimisation of the bending stresses through the optimization of the cutting tool fillet geometry as shown in the works of Dong et al 3 that focused on the geometry of the protruded hob cutter using Bezier curves, Spitas et al 4 that presented a two-parametric study of the rack cutter whole depth and fillet radius and Pedersen 5 that derived optimal tooth root shape using super ellipse cutter shapes. Direct tooth root stress minimisation techniques through the optimization of the tooth fillet geometry are also employed.…”

Section: Introductionmentioning

confidence: 99%

Fully ceramic versus steel gears: Potential, feasibility and challenges

Vasileiou,

Rogkas,

Markopoulos

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The most common gear strength calculations performed in accordance with ISO/TC 60/SC 2 include surface durability and root bending strength. Typical geared power transmissions are characterized by high Hertzian contact stresses (surface durability) on the flanks – frequently in the order of 103 MPa – versus almost half an order magnitude lower first principal stresses on the tooth root (tooth bending strength). Therefore, the use of high strength special steel alloys is almost mandatory, especially in high-end applications, mainly to withstand the high contact stress values. Ceramic materials are typically characterized by high compressive strength versus very low flexural strength that at first glance makes them inefficient for gear transmissions since they are unlikely to withstand the tensile root stresses. Nevertheless, ceramic materials possess a number of advantages that makes them potential candidates for geared transmissions, such as their exceptional thermal properties, their low density (weight), their excellent wear characteristics and limited lubrication demands. The present work investigates the main challenges of using high-end ceramic gears and attempts to provide an insight on defining the design envelope of such gears to counter the main disadvantages. The increase of the normal pressure angle beyond the 25° limit set by ISO 6336 is primarily investigated, since in minimizes the tensile tooth root stresses, while also increasing the curvature of the contact surfaces without greatly increasing Hertzian stresses. Comparative assessment of the performance of fully ceramic gear designs versus their conventional steel counterparts is performed through quasi-static FEA simulations to set the basic design requirements for such gears and to promote further investigation of the feasibility of their usage in high power density applications.

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“…Rollers in planet roller bearings (PRBs) are core elements, which are evenly distributed between two races. [1][2][3] Their shapes, sizes, and quantity can directly change the operating performance and fatigue life for PRBs. 4,5 Therefore, the roller profile modification is a vital method to enhance the load performance and reduce the vibrations of PRB.…”

Section: Introductionmentioning

confidence: 99%

A simulation method for dynamic force and vibrations of a roller bearing in the planetary gears considering the roller profile

Liu

Shi

Xu³

et al. 2023

The Journal of Strain Analysis for Engineering Design

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The roller profile shape can change the fatigue life and vibrations for planet roller bearing (PRB), as well as the impact between the rollers and cage. In this study, an analytical study of the dynamic forces and vibrations of a PRB considering the roller profile. To avoid the stress concentration at the roller ends, the roller modification method is proposed to improve the dynamic forces. The contact stiffness and load-deformation exponent of the roller-race interaction for four different roller modification types are achieved. A PRB dynamic model is established to discuss the effects of roller modification types on the dynamic forces and vibrations for PRB. Computation results of those four roller modification types are compared to the results of the PRB with the cylindrical roller type. It includes that the roller profile shape can greatly change the contact forces between the rollers and races, as well as the impact forces between the rollers and cage. The roller profile shapes can also influence the vibrations of PRBs.

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Rapid hob tip corner optimization of spur gears for increasing bending strength

Cited by 12 publications

References 54 publications

Dynamic modeling and vibration analysis of a flexible gear transmission system

Dynamic modeling and vibration analysis of a flexible gear transmission system

Fully ceramic versus steel gears: Potential, feasibility and challenges

A simulation method for dynamic force and vibrations of a roller bearing in the planetary gears considering the roller profile

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