Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 04, 2024 - October 05, 2024
Recently, hobbing using a multitasking machine has been investigated as a method for machining arbitrary tooth profiles in hobbing. However, the use of cantilevered hobs is expected to reduce machining accuracy due to reduced tool rigidity. To prevent this, it is necessary to create a machining path that takes tool deformation into account or to perform cutting under machining conditions that do not deform the tool. In either case, it is important to know in advance how cutting forces change when machining conditions are changed. There have been several studies in which cutting forces have been predicted by numerical calculations using computers. However, these studies did not consider tool or workpiece deformation, and it is unclear whether the same model can be applied to the use of a cantilevered hobbing tool. Therefore, in this study, we developed a method for predicting cutting forces that takes tool deformation into account. The developed system was verified by machining experiments using multitasking machine and rotary dynamometer. A comparison of the prediction accuracy between the cutting force calculation system that takes tool deformation into account and the cutting force calculation system that does not take tool deformation into account showed that the error was reduced by up to 3% compared to the cutting force calculation system that does not take tool deformation into account. However, the prediction error remained due to the use of a simplified cutting force calculation model.
