Design and Geometry of Face-Gear Drives

Litvin, Faydor L.; Zhang, Y.; Wang, J.-C.; Bossler, R. B.; Chen, Y.-J. D.

doi:10.1115/1.2917055

Cited by 96 publications

(78 citation statements)

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“…M Guingand et al 5 have done the contact analysis on the tooth surface, and the analysis of bending stress and the general test methods of bending stress were presented. FL Litvin et al [6][7][8][9] studied the application and basic theories of face gear such as the modeling and modification of tooth surface, tooth contact analysis, and the analysis of contact stress. Also, the tooth contact analyses of the orthogonal offset face-gear drive have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Loaded tooth contact analysis of curve-face gear pair

Lin

et al. 2017

Advances in Mechanical Engineering

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As a new gear pair with variable transmission ratio, curve-face gear can be applied to percussion drill to simplify the structure. For the application of curve-face gear pair, the loaded tooth contact analysis of curve-face gear pair should be taken into consideration. According to the gear meshing theory, the mathematical equations for the tooth surface of non-circular gear and curve-face gear were derived, and the meshing equations of this gear pair were also derived. Based on the method of the principal curvatures of space curve face, the variations in principal curvatures of non-circular gear and curve-face gear were proposed separately. With the mathematical method of Boussinesq problems, the loaded tooth contact analysis of curve-face gear pair was presented. The semi-major axis and semi-minor axis of contact ellipse on the surface of curve-face gear were proposed and simulated, and the maximum contact stress on contact area and its trend with the change in meshing situation were investigated, and the principles in the half cycle were also investigated. The tooth contact paths and the calculation method for the loaded tooth contact analysis of curve-face gear pair were verified by the rolling experiment.

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Section: Introductionmentioning

confidence: 99%

Loaded tooth contact analysis of curve-face gear pair

Lin

et al. 2017

Advances in Mechanical Engineering

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“…Therefore, it is addressed by many scholars, and there are a vast of manuscripts to discuss face gear drives in the past decade years. Litvin et al [1][2][3][4] investigated generations, stresses, and tooth contact analysis (TCA) of face gear drives. Barone et al 5 discussed the effects of misalignment errors and modifications on face gear drives.…”

Section: Introductionmentioning

confidence: 99%

Study of low-noise face gear drives associated with micro-punch webs

Chen

Zhu

2016

Advances in Mechanical Engineering

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Face gear dynamics is addressed by many scholars. However, design solutions of low-noise face gear drives without gear tooth modifications are not to be constructed. Thus, in this study, a design solution of low-noise face gear drives associated with micro-punch webs is proposed. A calculation procession of geometric parameters of micro-punch webs is constructed, an example case of a micro-punch web for a low-noise face gear drive is calculated, which is based on the proposed calculation procession, and the noise elimination effect of the example case is predicted. Meanwhile, the impacts of geometric parameters of micro-punch webs on sound resonant frequencies are discussed. Furthermore, an experiment of the example case is conducted to check the effect of micro-punch webs on noise reductions and the proposed calculation procession and design solution. The experimental results indicate that the noise reductions of face gear drives can be accomplished by micro-punch webs under the almost same dynamic response conditions, and the fidelity of the proposed calculation procession of geometric parameters of micro-punch webs and design solution of low-noise face gear drives can be accepted. These contributions would improve engineering applications of low-noise face gear drives.

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“…In face gear drive, a cylindrical gear is engaged with a bevel gear (Litvin, et al, 1992). In 1940's, Buckingham introduced face gear in his book.…”

Section: Fig 1 Ovtr Face Gear Pairmentioning

confidence: 99%

A five-axis CNC machining method of orthogonal variable transmission ratio face gear

Lin

Fan

Cao

et al. 2014

JAMDSM

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In order to verify the validity of the design for the orthogonal variable transmission ratio face gear pair, a five-axis CNC machine tool was used to machine this gear. The cutter tooth profile coordinate system, orthogonal variable ratio face gear machining coordinates, the model for the round-corner at tooth tip, the contact line model and CNC machining models were established by using space gear meshing theory and the machining principle of five-axis CNC machine tools. The method of machining this gear along the contact line has been obtained through the combination of the envelope method and milling principle. Cutter tooth profile equations, coordinate transformation matrices between the non-circular gear tooth surface and orthogonal variable transmission ratio gear tooth surface, transition surface equations and five-axis motion equations were derived. The rolling experiment and tooth surface measurement experiment were conducted on the gear, which was processed by a five-axis CNC machine. The results show that the tooth surface accuracy of the orthogonal variable transmission ratio face gear is high. The design of the orthogonal variable transmission ratio face gear, and its processing method using a five-axis NC machine have been verified.Key words : Face gear, CNC machining, Variable transmission ratio, Design, Drive IntroductionOrthogonal variable transmission ratio face gear drive is a gear drive where a non-circular gear and an orthogonal variable ratio face gear are engaged with a 90 degrees' intersecting axis. The orthogonal variable transmission ratio face gear combines the features of non-cylindrical gear and bevel gear and it allows variable transmission ratio between intersecting axis. The driving wheel is an on-cylindrical gear, and the driven one is a face gear. The gear pair can realize given variable transmission ratio. The Orthogonal variable transmission ratio face gear pair is shown in Figure1. In this research report, OVTR face gear is stand for orthogonal variable transmission ratio face gear. Fig. 1 OVTR face gear pairIn face gear drive, a cylindrical gear is engaged with a bevel gear (Litvin, et al., 1992). In 1940's, Buckingham introduced face gear in his book. Today, the face gear transmission structure is mainly used in the shunt transmission structure of the helicopter's main gear transmission system (George, 2002). Its narrow range of applications is attributed to reasons such as complexity of design, poor precision and difficulties in teeth grinding. the development and application of the face gear transmission.DARPA in the U.S. investigated the face gear transmission technique in TRP project, with the aim to apply this technique to the new generation Apache helicopter gunship. The study included the manufacturing and experiment of carburized face gear. Saga University in Japan used a large helical hob with less gear to machine face gear (Ohshima, et al., 2009). U.S. Processing and Treatment Center improved the hob and made it possible to process small face gears and imp...

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Design and Geometry of Face-Gear Drives

Cited by 96 publications

References 0 publications

Loaded tooth contact analysis of curve-face gear pair

Loaded tooth contact analysis of curve-face gear pair

Study of low-noise face gear drives associated with micro-punch webs

A five-axis CNC machining method of orthogonal variable transmission ratio face gear

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