중공단조품 냉간단조공정 설계

A cold forging process for hollow shaft shape was designed by using finite element method in the present study. Hollow shaft products have been widely used for auto transmission parts and other applications. Hollow shaft has been usually fabricated with gun drill machining to lower the weight of final product. However, more cost efficient ways to manufacture hollow type product has been sought since conventional machining usually costs quite much. There have been several ways to make hollow type forgings such as rotary swaging and rotary forging, which cost a lot of initial machine cost. In the present study, a conventional cold forging process was designed to make hollow shaft product using several step forgings.