公开(公告)号：US20180071812A1

公开(公告)日：2018-03-15

申请号：US15818316

申请日：2017-11-20

Applicant: NHK SPRING CO., LTD.

Inventor： Takeshi FURUSE ,  Yusuke KUMAGAWA

IPC: B21F35/02

CPC classification number: B21F35/02 ,  B21F1/02 ,  B21F1/026 ,  B21F3/04 ,  B21F11/00 ,  B21F11/005 ,  B21F23/00 ,  B21F23/002 ,  B21F23/005 ,  B21F35/00 ,  F16F2224/0208 ,  F16F2226/04 ,  F16F2238/026

Abstract: The coil spring manufacturing device includes a first continuous material mounting portion, a second continuous material mounting portion, a straightener, a cutter, a short material mounting portion, and a coiling machine. The material reeled out from a first continuous material or a second continuous material is cut by the cutter. The coil spring manufacturing device can switch a process among a first continuous material coiling process of manufacturing a coil spring by using the first continuous material, a second continuous material coiling process of manufacturing a coil spring by using the second continuous material, and a short material coiling process of manufacturing a coil spring by using the short material.

公开(公告)号：US20170348759A1

公开(公告)日：2017-12-07

申请号：US15686849

申请日：2017-08-25

Applicant: NHK SPRING CO., LTD.

Inventor： Takeshi FURUSE ,  Yusuke KUMAGAWA

IPC: B21F3/06 ,  B21F35/00 ,  B21F11/00

Abstract: A coiling machine includes a material guide, first pin, second pin, pitch tool, cutting tool, heating device, temperature sensor, and controller. A material is bent between the first pin and the second pin to form an arc part between the first pin and the second pin. The controller select control data corresponding to the temperature of the material from a plurality of control data corresponding to a processing temperature. Then, the positions of the first pin and the second pin are controlled such that a radius of curvature of the arc part increases when the temperature of the material increases, and the position of the cutting tool is controlled such that a gap between the center of curvature of the arc part and the cutting tool increases.