公开(公告)号：US10052677B2

公开(公告)日：2018-08-21

申请号：US15027393

申请日：2014-10-08

Applicant: NHK SPRING CO., LTD.

Inventor： Keita Takahashi ,  Tohru Shiraishi ,  Yuichiro Ono ,  Kaoru Nagasawa

IPC: B21F11/00 ,  B21F35/00 ,  B21F23/00 ,  B21F3/06 ,  B21F99/00 ,  H05B6/10

CPC classification number: B21F35/00 ,  B21F3/06 ,  B21F11/005 ,  B21F23/00 ,  B21F99/00 ,  H05B6/101

Abstract: A spring forming device in which the steel wire can be continuously cut off without stopping the feeding of the steel wire in cutting, and in which the steel wire can be uniformly heated, is provided. The spring forming device has a wire supplying mechanism for supplying a steel wire using a plurality of feeding rollers, a heating mechanism for heating the steel wire, a coiling mechanism for forming in a coil state the heated steel wire, and a cutting mechanism for cutting the steel wire coiled at a given number of turns off the steel wire remained backward. A cutting blade of the cutting mechanism follows tracks having a speed Va that moves to the receiving blade and a speed Vc that moves in an axial direction of the coiled steel wire, in cutting of the steel wire.