公开(公告)号：US5875665A

公开(公告)日：1999-03-02

申请号：US806118

申请日：1997-02-25

申请人： Masahiko Yamamoto ,  Katsuyoshi Suzuki ,  Shigehide Ishikawa ,  Mineo Suzuki ,  Takumi Yamada ,  Youichi Harada ,  Toshiyuki Miyagawa ,  Daisuke Okuizumi ,  Koichi Mikami

发明人： Masahiko Yamamoto ,  Katsuyoshi Suzuki ,  Shigehide Ishikawa ,  Mineo Suzuki ,  Takumi Yamada ,  Youichi Harada ,  Toshiyuki Miyagawa ,  Daisuke Okuizumi ,  Koichi Mikami

IPC分类号： B21D7/025 ,  B21D11/02

CPC分类号： B21D7/025

摘要： An apparatus for bending a workpiece comprises a stretching device for stretching the workpiece. In the process for bending the workpiece, an inclination angle made by a direction a tension force is acted to the workpiece and a direction a stretching forth is applied to the workpiece by the stretching member is detected. The tension force acted to the workpiece is controlled in such a manner that the stretching force from the stretching member is controlled in consideration of the inclination angle. Accordingly, the amount of the spring back after bending is uniform and an accuracy of the dimension of the bent workpiece is improved.

摘要翻译： 用于弯曲工件的装置包括用于拉伸工件的拉伸装置。 在工件弯曲的过程中，检测由拉伸方向产生的倾斜角度，并且拉伸部件向工件施加拉伸方向。 控制作用于工件的张力以这样的方式控制，即，考虑到倾斜角来控制来自拉伸构件的拉伸力。 因此，弯曲后的回弹量是均匀的，并且弯曲的工件的尺寸的精度提高。