公开(公告)号：US20230045564A1

公开(公告)日：2023-02-09

申请号：US17782307

申请日：2020-11-30

申请人： NTN Corporation

发明人： Daigo NISHIYA ,  Tsukasa IIJIMA

IPC分类号： B23Q17/00 ,  B23B31/20 ,  B23Q17/24 ,  B23B31/00

摘要： Provided is a gripping method including: a phase matching step of matching tool relief grooves of a contact metal member and track grooves of a constant velocity universal joint component with each other in phase; a measuring step of measuring phase differences between the track grooves of the constant velocity universal joint component and a female spline of the constant velocity universal joint component; a matching step of matching, based on a result of the measuring step, a stopper with a recessed portion of the female spline having the smallest phase difference and gripping the constant velocity universal joint component by a collet chuck. Under a state in which the constant velocity universal joint component is gripped by the collet chuck, the contact metal member holds the constant velocity universal joint component.