Lin Han* and Yang Qi
Background: Recent reviews on tooth modification of involute cylindrical gear are presented. Gear pairs are widely employed in motion and power transmission systems. Manufacturing and assembling errors of gear parts, time-varying mesh stiffness and transmission error of gear pair, usually induce vibration, noise, non-uniformly load distribution and stress concentration, resulting in earlier failure of gear. Tooth modification is regarded as one of the most popular ways to suppress vibration, reduce noise level, and improve load distribution of gear pairs.
Objective: To provide an overview of recent research and patents on tooth modification method and technology.
Methods: This article reviews related research and patents on tooth modification. The modification method, evaluation, optimization and machining technology are introduced.
Results: Three types of modifications are compared and analyzed, and influences of each on both static and dynamic performances of gear pair are concluded. By summarizing a number of patents and research about tooth modification of cylindrical gears, the current and future development of research and patent are also discussed.
Conclusion: Tooth modification is classified into tip or root relief along tooth profile, lead crown modification along tooth width and compound modification. Each could be applied in different ways. In view of design, optimization under given working condition to get optimal modification parameters is more practical. Machining technology and device for modified gear is a key to get high quality performance of geared transmission. More patents on tooth modification should be invented in future.
Dynamic performance, lead crown, machining technology, optimization, tip relief, tooth modification.
School of Mechanical Engineering, Tianjin University of Technology and Education, 1310#, Dagu South Road, Jinnan District, Tianjin City 300222, School of Mechanical Engineering, Tianjin University of Technology and Education, 1310#, Dagu South Road, Jinnan District, Tianjin City 300222