A motion control method for face hobbing on CNC hypoid generator

Zhang, Weiqing; Cheng, Bingkui; Guo, Xiaodong; Zhang, Mingde; Yuan, Xiangwei

doi:10.1016/j.mechmachtheory.2015.05.008

Cited by 17 publications

(10 citation statements)

References 16 publications

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“…Figure 2 demonstrates the convergence of a 1 towards the actual ratio value and the gradual elimination of the two closest irreducible fractions. Furthermore, Figure 3 depicts the gradual convergence of the estimation for the error of each single measurement according to equation (9), solved for e y .…”

Section: Results and Discussion Estimation And Verification Of Gearbomentioning

confidence: 99%

“…8 The aforementioned works refer to the process and marginally to the machine tool. Although Computer Numerical Control (CNC) hobbing machines are in use in contemporary industry, 9 non-CNC hobbing machines, as the one examined in this paper, are still widely used in workshops. This is the reason for laying down a methodology for the identification of the internal gear ratios of a hobbing machine in order to achieve its restoration.…”

Section: Introductionmentioning

confidence: 99%

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A mathematically assisted methodology for the experimental calculation of the internal gear ratios to extend the lifecycle of a hobbing machine

Sakaridis

Ntourmas

Athanasopoulos

et al. 2017

International Journal of Mechanical Engineering Education

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Manufacturing of gears can be achieved with various methods, including the cutting of gears in a hobbing machine. The function of such a machine tool is based on a combination of timing gears which synchronize all moving components accurately. Variations in the synchronization, which alter the geometric features of the gear being cut, are achieved via external gearboxes with interchangeable gears. Thus, precise knowledge of the change gears that correspond to the desired gear geometry is essential in order to operate the machine tool properly. The hobbing machine examined in this paper had remained unused for years, without a manual to indicate the correct use of the external gearboxes. The task was to render the machine tool functional by devising an experimental procedure for the calculation of the internal gear ratios and the correct combination of change gears, making use only of simple tools. The project was carried out successfully and proved to be an excellent case study to delve into the manufacturing as well as the use of gears. The documentation of the whole procedure and a short explanatory video are integrated within the educational aids of a relative course in the School of Mechanical Engineering 1. The nature of gear drivetrains themselves, in particular the fact that all gear ratios are ratios of integer numbers; this is not true, for example, for belt drives.

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Section: Results and Discussion Estimation And Verification Of Gearbomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A mathematically assisted methodology for the experimental calculation of the internal gear ratios to extend the lifecycle of a hobbing machine

Sakaridis

Ntourmas

Athanasopoulos

et al. 2017

International Journal of Mechanical Engineering Education

View full text Add to dashboard Cite

show abstract

“…During the last decades, many research works have been directed towards the manufacture of spiral bevel and hypoid gears with optimal tooth surface modifications. 57–92…”

Section: Introductionmentioning

confidence: 99%

Improvements in the mixed elastohydrodynamic lubrication and in the efficiency of hypoid gears

Simon

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this paper, the influence of the manufacturing parameters on the conditions of mixed elastohydrodynamic lubrication is investigated. On the basis of the obtained results, recommendations are formulated to improve the mixed EHL and the efficiency of face-milled hypoid gears. A full numerical analysis of the mixed EHL in hypoid gears is applied. The equation system and the numerical procedure are unified for a full coverage of all the lubrication regions, including the full film, mixed, and boundary lubrication. In the hydrodynamically lubricated areas, the calculation method employed is based on the simultaneous solution of the Reynolds, elasticity, energy, and Laplace's equations. In the asperity contact areas, the Reynolds equation is reduced to an expression equivalent to the mathematical description of dry contact problem. The real geometry and kinematics of the gear pair based on the manufacturing procedure are applied; thus, the exact geometrical separation of the mating tooth surfaces is included in the oil film shape, and the real velocities of these surfaces are used in the Reynolds and energy equations. The transient nature of gear tooth mesh is included. The oil viscosity variation with respect to pressure and temperature and the density variation with respect to pressure are included. The non-Newtonian behaviour of the lubricant is considered. Using this model, the pressures, film thickness, temperatures, and power losses in the mixed lubrication regime are predicted. The effectiveness of the presented method is demonstrated by using hypoid gear examples.

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“…The process technology of a conventional spiral bevel gear (SBG) commonly used in automotive industry is monopolized by Gleason, Oerlikon and Klingelnberg [1][2][3]. Generally speaking, there are mainly two types of machine tools: the professional traditional mechanical machine tool and the professional computer numerical control (CNC) machine tool [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Five-Axis Numerical Control Machining of the Tooth Flank of a Logarithmic Spiral Bevel Gear Pinion

Xiang

2018

TFAMENA

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In this paper, the production of a logarithmic spiral bevel gear prototype is illustrated by the manufacture of the gear pinion. Firstly, the conical gear body of a logarithmic spiral bevel gear pinion was shaped on a C6140A1 lathe. A kinematic model of a five-axis vertical machining centre DMG DMU40 monoBLOCK, with the position and orientation of each axis relative to the movement of the workpiece, was created. In addition, the processing coordinate transformation formula between the workpiece coordinate system and the cutter coordinate system was devised. The cutter location file was converted to the numerical control code of the DMG DMU40 monoBLOCK. Finally, the pinion of a logarithmic spiral bevel gear was machined on the DMG DMU40 monoBLOCK as a prototype to be used in further research of the logarithmic spiral bevel gear.

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A motion control method for face hobbing on CNC hypoid generator

Cited by 17 publications

References 16 publications

A mathematically assisted methodology for the experimental calculation of the internal gear ratios to extend the lifecycle of a hobbing machine

A mathematically assisted methodology for the experimental calculation of the internal gear ratios to extend the lifecycle of a hobbing machine

Improvements in the mixed elastohydrodynamic lubrication and in the efficiency of hypoid gears

Five-Axis Numerical Control Machining of the Tooth Flank of a Logarithmic Spiral Bevel Gear Pinion

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