Improving the Bending Strength of Spur Gear Tooth Through Profile Modification using Cad
Journal Title: International Journal of Mechanical and Production Engineering Research and Development (IJMPERD ) - Year 2017, Vol 7, Issue 4
Abstract
Undercutting is one of the major tooth failure criteria, observed basically in 20-degree pressure angle, full depth teeth, having number of teeth less than 17 in case of spur gears. Undercutting removes the root of tooth, which causes bending of tooth, leading to tooth breakage at root portion. This work is focussed on avoiding undercutting problems by minimizing the bending stress that occurs at the root portion of the tooth. The method of Profile Modification is taken as the corrective measure to minimize the bending stress at the root. A spur gear having 14 numbers of teeth was modelled in CATIA V5 and a single spur gear tooth was considered for Finite Element Analysis as per the Lewis Model for investigating bending stress in ANSYS 16.0 Workbench. In this paper, the three parameters, Profile Radius, Root Radius and Face width were optimized. Profile Radius and Root Radius were optimized, which yielded better results of bending stress reduction. But, when Face width was taken into consideration, there was tremendous reduction in bending stress, leading to better improvement in the bending strength of the tooth, which can minimise undercutting problems and avoid tooth breakage.
Authors and Affiliations
Suswanth Poluru, Vijay Pandey
Keywords
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