Abstract
The physical properties of plastic greatly vary with temperature. Therefore, to estimate the lifetime of the plastic gear, it is necessary to estimate the temperature of the gear during operation. However, since the plastic is polymer material, it is difficult to estimate the temperature of the plastic gear during operation. On the other hand, in the case of crossed helical gears with a large sliding velocity, frictional heat is greater than that for other cylindrical gears. Accordingly, we proposed a method to estimate the temperature of plastic crossed helical gear pair using the mean flash temperature and verified the validity of the proposed method based on the experimental results. However, this verification was the consequences of only one gear dimensions. In this study, we examined experimentally the range of the applicable gear dimensions of the proposed method. As the results, we confirmed that it is possible to apply the proposed method to the plastic crossed helical gear pair of gear dimensions which is generally used.
