公开(公告)号：US20040020052A1

公开(公告)日：2004-02-05

申请号：US10612160

申请日：2003-07-02

Applicant: Tsubakimoto Chain Co.

Inventor： Yusuke Haga ,  Toru Okabe ,  Nobuaki Haga

IPC: B21K001/76

CPC classification number: B21K1/00 ,  B21K21/08 ,  B21K21/12 ,  B21K21/16 ,  B21L9/00 ,  F16G13/06 ,  Y10T29/49668 ,  Y10T29/49671 ,  Y10T29/49673

Abstract: By press-fitting a cylindrical blank into a die with one of a pair of punches, and at the same time press-fitting small diameter end portions and tapered portions of the pair of punches into both ends of the cylindrical blank while restraining both end surfaces of the blank with cylindrical members movable on the outsides of the punches, the external circumferential surface of the blank is finish molded to the required diameter by the internal circumferential surface of the die and, at the same time, tapered surfaces are formed on the inner circumferential surface in both ends of the blank. The process produces a bushing with its internal surfaces accurately coaxial, and with the external surface accurately formed to the required diameter.

Abstract translation: 通过用一对冲头中的一个将圆柱形坯料压入模具，同时将一对冲头的小直径端部和锥形部分压入圆柱形坯料的两端，同时限制两个端面 在可以在冲头外侧移动的圆筒形构件的坯料上，坯料的外周面通过模具的内周面被精加工成所需的直径，同时在内部形成锥面 空白两端的圆周表面。 该过程产生一个衬套，其内表面精确地同轴，外表面准确地形成所需的直径。