公开(公告)号：US20200240487A1

公开(公告)日：2020-07-30

申请号：US16604417

申请日：2018-04-10

Applicant: NHK SPRING CO., LTD.

Inventor： Toshiyuki AKANUMA ,  Tohru SHIRAISHI ,  Yohei IWAGAKI ,  Keita TAKAHASHI ,  Shun HIRAI

IPC: F16F1/02 ,  F16F1/06 ,  B21F3/06 ,  C21D9/02 ,  C21D8/06 ,  C21D1/06 ,  C23C8/22 ,  C21D6/00 ,  C22C38/46 ,  C22C38/24 ,  C22C38/22 ,  C22C38/02 ,  C22C38/04

Abstract: A compression coil spring includes a steel wire material containing, hereinafter in weight %, 0.5 to 0.7% of C, 1.2 to 3.0% of Si, 0.3 to 1.2% of Mn, 0.5 to 1.9% of Cr and 0.05 to 0.5% of V as necessary components, one or more kinds selected from not more than 1.5% of Ni, not more than 1.5% of Mo and not more than 0.5% of W as freely selected components, and iron and inevitable impurities as the remainder; the C-condensed layer which exceeds the average concentration of C contained in the steel wire material exists at a surface layer part, and the thickness of the C-condensed layer is within 0.01 to 0.05 mm along the entire circumference of the steel wire material.

公开(公告)号：US20160243607A1

公开(公告)日：2016-08-25

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

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.

Abstract translation: 提供一种弹簧形成装置，其中钢丝可以在不停止切割中的钢丝的进给的情况下被连续地切断，并且其中钢丝可以被均匀地加热。 弹簧形成装置具有用于使用多个进给辊供给钢丝的供线机构，用于加热钢丝的加热机构，用于在线圈状态形成加热的钢丝的卷取机构以及用于切割的切割机构 以一定数量的关闭钢丝卷绕钢丝的钢丝保持向后。 在切割钢丝时，切割机构的切割刀片跟随具有移动到接收刀片的速度Va的轨迹和沿着线圈钢丝的轴向方向移动的速度Vc。