公开(公告)号：US5697206A

公开(公告)日：1997-12-16

申请号：US595997

申请日：1996-02-06

申请人： Tomofumi Otani ,  Sachihiko Maeda ,  Shuji Sasamoto ,  Masaharu Tamaki ,  Takero Nakagawa ,  Yoshitaka Yoshimura ,  Hiroshi Kobayashi

发明人： Tomofumi Otani ,  Sachihiko Maeda ,  Shuji Sasamoto ,  Masaharu Tamaki ,  Takero Nakagawa ,  Yoshitaka Yoshimura ,  Hiroshi Kobayashi

IPC分类号： B21D3/14 ,  B21L9/00 ,  F16C13/00 ,  F16G13/06 ,  B21L9/02

CPC分类号： F16G13/06 ,  F16C13/006 ,  Y10T29/49702

摘要： The present invention improves accuracy in the axial dimension of rolled parts for a chain such as bushings, rollers and similar. A rolled part is manufactured by cutting a strip of steel into a rectangular shape to obtain a rectangular base material having a predetermined dimension, The rectangular base material is rolled into a clindrical shape to obtain a cylindrically formed part having cut end surfaces face each other. A core is inserted for rolling the rectangular base material into the cylindrically formed part. The cylindrically formed part is then pressed through a die having a circular opening. The rolled part has a plurality of blind grooves on a surface thereof. While the cylindrically formed part is being pressed through the die having a circular opening, a plastic flow of the material of the cylindrically formed part intensively occurs in a direction toward the blind grooves. Since the plastic deformation of the rolled part is absorbed by the blind grooves, axial dimension of the rolled part hardly varies,

摘要翻译： 本发明提高了诸如衬套，辊等的链条的轧制部件的轴向尺寸的精度。 通过将钢带切割成矩形形状来制造轧制部件，以获得具有预定尺寸的矩形基材。将矩形基材卷成圆柱形，以获得具有切割端面彼此面对的圆柱形部分。 插入用于将矩形基材卷绕成圆筒形部件的芯体。 然后将圆筒形的部件压入具有圆形开口的模具中。 轧制部件在其表面上具有多个盲槽。 当圆柱形部分被压入具有圆形开口的模具时，圆柱形成形部件的材料的塑性流动趋向于盲槽的方向。 由于轧制部的塑性变形被盲槽吸收，所以轧制部的轴向尺寸几乎不变化，