스퍼기어의 고정밀 전조가공을 위한 실험적 연구

This study deals with finish roll forming by forced displacement can be conceived as a method of eliminating errors in conventional form rolling under constant loads. This method produces a high-precision tooth profile by low-speed form rolling when a high rigid screw or cam is used at the pressurized section. The finish roll forming is the improvement method for gear class after hobbing & shaving. There are two types of errors after rolling profiles. One is the concave error on the generating pitch circle and the other is pressure angle error on the driven side. It is considered that the concave error has occurred due to variation of the number of contact teeth. Recently, many researchers study to reduce these two errors. They suggested constant loading method(C. L. M) and forced displacement method. We verified the character of concave error, pressure angle error, tool loading force and number of finish roll forming by using forced displacement method.