公开(公告)号：EP0960668A3

公开(公告)日：2001-09-12

申请号：EP99110252.6

申请日：1999-05-27

申请人： KOYO SEIKO CO., LTD. ,  NAKANISHI METAL WORKS CO., LTD.

发明人： Ikeda, Takaaki, c/o Koyo Seiko Co.,Ltd. ,  Numata, Tetsuaki, c/o Koyo Seiko Co.,Ltd. ,  Kamiji,Michiyuki, c/o Nakanishi Metal Works Co.Ltd ,  Maeda, Hiroyuki, c/o Nakanishi Metal Works Co.Ltd.

IPC分类号： B21D53/12 ,  B21D53/26 ,  F16D41/07

CPC分类号： F16D41/067 ,  B21D53/12 ,  Y10T83/0524 ,  Y10T83/0596

摘要： A method for manufacturing a one-way clutch cage allows slits of the cage to be punched out with a short punching distance wherein the slits are narrow in width and less prone to deformation. In this method for manufacturing a one-way clutch cage, after slits 8, 10, 11, 12 have been punched out, windows 17 are punched out and then an outer annular part 18 is cut. Therefore, since slits can be formed in a cylindrical member 2 that has not yet been subjected to the window punch-out process or the outer annular part cut-out process and that is in a sufficient strength state, a diagonal punching that a boundary portion between a cylindrical portion 3 and an outer flange 5 is punched out from radial diagonal inside toward radial diagonal outside can be used to form the slits. Thus, the punching distance can be shortened, the punching die can be thinned in thickness and the slit width can be reduced, as compared with the horizontal punching.