Computer Aided Analysis of Involute Gear Tooth for Minimization of Bending Stress

Plastic and sintered gears, as well as carburized or surface-quality upgraded gears with very high surface fatigue strength, have a serious problem with bending load-carrying capacity. In addition to heat treatment technology and increased tooth fillet surface quality, large cutter tip corners can increase the capability to carry a load of transmissions. Modifying the involute geometry can also increase the capability to carry a load. It is possible to make the gears asymmetric by giving the power side a different pressure angle from the tooth side. By employing asymmetric teeth, gears can perform better, including the increased capability to carry a load, less bending stress, and increased resistance to wear on the drive side. The effect of asymmetric gears with a larger pressure angle on the drive side than on the coast side was explored in this study. In addition to the aforementioned changes, it has been demonstrated that changing the root fillet radius can lower bending stresses. Because the bending force is reduced, small gears or lighter gears can be produced. This advantage allows gears to be used in a larger range of industries, including aerospace and automotive. ANSYS software is used to simulate the involute profile of gear teeth and perform the analysis.