...Alessandro Fortunato; Erica Liverani; Lorenzo Cestone; Flavia Lerra; Alessandro Ascari; Hambal Iqbal; Adrian H.A. Lutey Gears represent a fundamental component of automotive transmissions, the performance of which is directly influenced by flank surface integrity. With the exception of grinding...

...Flavia Lerra; Erica Liverani; Enrico Landi; Alessandro Fortunato Grinding is an indispensable phase in the gear production chain as it allows very stringent requirements characteristic of the automotive sector to be satisfied. The main goal of this finishing process is to ensure compliance...

... existing ones for noncircular gears is shown. Relationships for the mutual position of the cutting tool and noncircular cogbelt pulley during teeth generating are given. The profile of the tool’s cutting edge, which provides the required shape of tooth spaces, is elaborated. Recommendations for designers...

...Ruei-Hung Hsu; Zhang-Hua Fong The surface roughness of the work gear after plunge shaving is affected primarily by the arrangement of the serrations. Given the two possible shaving conditions—up cutting and down cutting—this surface roughness can be improved by arranging the serrations’ cutting...

...Lars Vedmar; Carin Andersson; Jan-Eric Ståhl Hobbing is a common manufacturing method when producing helical, involute gears. In order to increase tool life and surface finish, an accurate method to determine chip geometry is needed. Although this accurateness may involve numeric solutions...

...Yohan Kondo; Kazuyuki Sasajima; Sonko Osawa; Osamu Sato; Masaharu Komori The pitch accuracy of a gear is graded on the order of 0.1 μ m in ISO 1328-1; therefore, it is necessary for gear measuring instruments (GMIs) to be able to measure gears with the required high accuracy. GMIs are evaluated...

...Vilmos Simon In this paper, a method is presented for the determination of the differences between the worm gear tooth surface processed by an oversized hob of finite number of teeth or by a flying tool, and the theoretically required gear tooth surface. The influence of hob oversize and machine...

...Stephen P. Radzevich This paper is aiming at development of an analytical approach for computation of the geometrical parameters of cutting edges of an involute hob. It is well recognized that the involute hob geometry strongly affects the cutting tool performance, as well as the efficiency of gear...

...Dimitriou Vasilis; Vidakis Nectarios; Antoniadis Aristomenis Gear hobbing, as any cutting process based on the rolling principle, is a signally multiparametric and complicated gear fabrication method. Although a variety of simulating methods has been proposed, each of them somehow reduces...

...Cihan O¨zel; Ali I˙nan; Latif O¨zler Accurate manufacturing of bevel gears is an important problem for small workshops because the module milling cutters used for manufacturing are not accurate enough for the task. In this study, manufacturing of straight bevel gears is investigated by using end...

...Stephen P. Radzevich The paper is targeting on the finishing of precision gears for low-noise/noiseless transmission for cars and light trucks. Transmission error is the predominant cause of gear noise. The application of a topologically modified pinion results in reduction of transmission error up...

...Jong-Ho Song; Yong-Taek Im, Professor, Fellow ASME In this study, a major design parameter was identified for cold forward extrusion of solid or hollow spur gears by investigating the effect of gear geometries and forming variables on formation of gear teeth by finite element simulations...