公开(公告)号：US20170157744A1

公开(公告)日：2017-06-08

申请号：US15434519

申请日：2017-02-16

Applicant: NHK SPRING CO., LTD.

Inventor： Senri MORIYAMA ,  Satoshi AKIYAMA ,  Masaya KOMAZAKI ,  Go NAGAYASU ,  Hideki OKADA ,  Daisuke YOKOTA

IPC: B24C1/10 ,  F16F1/04 ,  B24C3/24

CPC classification number: B24C1/10 ,  B24C3/24 ,  F16F1/02 ,  F16F1/04

Abstract: A vertical motion impeller-type shot peening device performs a second shot peening to a coil spring including first shot peening indentations. The vertical motion impeller-type shot peening device includes a workpiece holding mechanism including a lower end turn support and an upper end turn support, a stress applying mechanism which compresses the coil spring, a rotation mechanism, and a projection mechanism which includes a pair of vertically movable impeller units. A first rough surface including first shot peening indentations is formed on a part of end turn portions of the coil spring. A second rough surface including second shot peening indentations is formed on the entire surface of wire except for the first rough surface.

公开(公告)号：US20180354098A1

公开(公告)日：2018-12-13

申请号：US16107629

申请日：2018-08-21

Applicant: NHK SPRING CO., LTD.

Inventor： Hideki OKADA ,  Daisuke YOKOTA ,  Senri MORIYAMA ,  Satoshi AKIYAMA ,  Masaya KOMAZAKI ,  Go NAGAYASU

IPC: B24C1/10

Abstract: A coil spring processing device includes an end positioning device, shot peening device, and controller. The end positioning device positions ends of a coil spring. The shot peening device includes a turntable mechanism, pressure mechanism, rotation mechanism which rotates the coil spring, and projection mechanism which projects shots. Holding mechanisms each include a lower shifting prevention jig and an upper shifting prevention jig. The controller stops a first holding mechanism and a second holding mechanism in rotation stop positions corresponding to end turn portions of the coil spring.

公开(公告)号：US20190232462A1

公开(公告)日：2019-08-01

申请号：US16383231

申请日：2019-04-12

Applicant: NHK SPRING CO., LTD.

Inventor： Senri MORIYAMA ,  Satoshi AKIYAMA ,  Masaya KOMAZAKI ,  Go NAGAYASU ,  Hideki OKADA ,  Daisuke YOKOTA

IPC: B24C1/10 ,  F16F1/04 ,  B24C3/24 ,  F16F1/02

CPC classification number: B24C1/10 ,  B24C3/24 ,  F16F1/02 ,  F16F1/04

Abstract: A coil spring includes a helically formed wire having end turn portions at ends thereof, a plurality of first rough surfaces, each including first shot peening indentations formed on a part of a surface of the end turn portions, and a second rough surface including second shot peening indentations formed on the entire surface of the wire except for the first rough surface. The second rough surface has a surface roughness different from that of the first rough surface.

公开(公告)号：US20180354097A1

公开(公告)日：2018-12-13

申请号：US16107507

申请日：2018-08-21

Applicant: NHK SPRING CO., LTD.

Inventor： Hideki OKADA ,  Daisuke YOKOTA ,  Senri MORIYAMA ,  Satoshi AKIYAMA ,  Masaya KOMAZAKI ,  Go NAGAYASU

IPC: B24C1/10

CPC classification number: B24C1/10 ,  B24C3/24 ,  B24C3/32 ,  B24C9/00

Abstract: A shot peening device includes a turntable which rotates about a revolution axis, holding mechanism which moves with the turntable, pressure mechanism which compresses a coil spring, rotation mechanism which rotates the coil spring, projection mechanism which projects shots to the compressed coil spring, load cell which detects a load applied to the coil spring, and controller. A signal output from the load cell is input to the controller, and the controller detects a chronological change of the load applied to the coil spring during the shot peening.