Increased machine efficiency is a requirement in today’s world and geared transmissions are no exception. A back-toback gear test rig was used to compare dip lubrication with spray lubrication regarding gearbox efficiency, mesh efficiency, gear temperature and surface roughness. Gears lubricated at the inlet of the mesh show a lower measured temperature when compared to spray lubrication at the...

Hydroforging is a hybrid forming operation whereby a thick tube is formed to a desired geometry by combining forging and hydroforming principles. Through this process hollow structures with high strength-to-weight ratio can be produced for applications in power transmission systems and other structural components that demands high strength-to-weight ratio. In this process, a thick tube is defor...

A new numerical method of solution has been developed for the analysis of deformation and stresses in elastic bodies subjected to mixed boundary-conditions. The program is capable of dealing with both regular and irregular shapes of boundaries appropriately. An ideal mathematical model, based on the displacement potential function, has been used in the finite difference solution. The present pa...

This paper describes the method of designing a Spur Gear Tooth using an S-shaped transition curve joining two tangent circles. For this purpose a single segment of cubic Bézier curve has been used as a transition between two tangent circles of same diameter. This transition curve not only maintains G Hermite like conditions but also guarantees not more than one inflection point in its curvature...

Diagnostics of faults in gears requires development of reliable condition indicators. A large number of condition indicators, which are based on statistical moments of the synchronous average and its derivatives (difference and residual signals) were previously suggested. This study evaluates the efficiency of different gear condition indicators that are based on statistical moments and compare...

In practice, gear backlash and bearing clearance usually exist together in a system. They may induce complicated dynamic responses degrade transmission performance. Up to now, although each of them has been researched, little attention paid the coupling characteristics clearance. limited number relevant studies, since linear collision models they adopted are difficult realistically depict actua...