Choosing the optimal addendum modification coefficient of external involute spur gear

Abstract

The influence of addendum modification coefficient (AMC) on the durability and load-carrying ability of gear pairs is widely adopted in the production of gears. However, the effect of AMC only surveyed at single-point, intermittent in the range of values that have not come up with the optimal value of them. In order to overcome these disadvantages, this study is proposed to develop a method for choosing the optimal AMC of external involute spur gear with the aim to improve load-carrying capacity of gears, reduce vibrations, suppress the noises and extend service life and so on. This paper investigates choosing the optimal AMC of gears based on all the necessary conditions according to the standard design that is selected. Three objectives are studied for optimal selection. As such, the combination of Pareto optimal and genetic algorithm methods is applied for gear optimization. Our method is shown to be better in the difference maximum of sliding factors and the difference of form base on the maximum of sum of AMC. The analysis results of tooth root stress and contact stress were decreased significantly. This implies the feasibility of the optimization design for increasing the gears’ properties by choosing the optimal AMC.

Keywords:

• Addendum modification coefficient
• gear optimization
• tooth root stress
• kinematic limit