Abstract The most simple and robust construction of the monolithic gear hobs present a common helical rake face for given line teeth, whose generatrix is straight-line segment perpendicular to hob’s axis while its directory helix, pitch helix. As consequence, constructive angles are zero on all edges. Total curvatures such surface negative. Thus, it can be grinded only using conical platter typ...

This paper presents a novel approach to solve the multi-objective optimization problem designing two-stage helical gearbox by applying Taguchi method and grey relation analysis (GRA). The objective of study is identify optimal main design factors that maximize efficiency minimize mass. To achieve that, five factors. including coefficients wheel face width (CWFW) first second stages, allowable c...

Power losses in gearboxes result frictional heating. Sufficient heat transfer from the gearbox to environment is required for reliable operation. The dissipation gears linked their interaction with fluids gearbox. Recent research has demonstrated use of Computational Fluid Dynamics (CFD) predict fluid flow and no-load an isothermal manner. This study focuses on a numerical analysis within dry-l...

The aim of this study is to evaluate the effect of super finishing on gear acceleration and noise level. Many researchers [1-13] have studied the gear dynamic models to study the effect of various parameters on gear dynamics. A 6DOF model is developed and experimental studies were conducted. In this study, the effects of super finishing [14, 15] on gear acceleration and noise level were evaluat...

the new device made in this study could calculate the proper position of tillage tools relative to the land surface at each point, and hydraulic operator set its optimum position. the optimum position of tools is calculated by depth control software developed for this device, and its input data were depth for root development. the performance of device was tested on subsoiler for precision till...

Comparing with fixed shaft gearbox, vibration properties of planetary gearbox are much more complicated. In a planetary gearbox, there are multiple vibration sources as several pairs of sun-planet gears and several pairs of ringplanet gears mesh simultaneously. In addition, the signal transmission path changes due to the rotation of the carrier. To facilitate fault detection of a planetary gear...