Design and Static Analysis of an Addendum Modified Helical Gear Tooth

A gear is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part in order to transmit torque. We have several types of gears among which spur gears are used as pinion and gear between parallel shafts.. When the involute portion of the tooth mates with the non-involute portion of the other tooth an undercut is formed. Due to this the mating gear will try to scoop out metal from the interfering portion. In order to avoid undercutting and interference, addendum modification of the gear tooth is carried out. This paper describes about the modeling meshing and the analysis techniques. Effort has been taken to develop the tooth profile involute as well as the fillet region by calculating the co-ordinates using C-language. The output file of the C-program is converted to modeling software PRO/E for 3-D modeling with the help of a coupler software DXF file converter. Those PRO/E models are imported to an analysis software ANSYS for the proposed stress analysis.