公开(公告)号：EP3231644A4

公开(公告)日：2018-05-23

申请号：EP15868473

申请日：2015-12-04

Applicant: NHK SPRING CO LTD

Inventor： KUWATSUKA SHINICHIRO ,  OKUDAIRA YURIKA ,  TANGE AKIRA ,  OKADA HIDEKI ,  TAKAHASHI KEN

IPC: B60G21/055 ,  B21D47/00 ,  B21D53/88 ,  B24C1/10 ,  C21D1/60 ,  C21D6/00 ,  C21D7/06 ,  C21D8/06 ,  C21D9/00 ,  C21D9/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/54 ,  C22C38/60 ,  F16F1/14

CPC classification number: C21D9/0068 ,  B21D47/00 ,  B21D53/88 ,  B24C1/10 ,  B60G21/055 ,  B60G2206/427 ,  B60G2206/724 ,  B60G2206/81035 ,  B60G2206/8402 ,  B60G2206/8403 ,  C21D1/60 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D7/06 ,  C21D8/065 ,  C21D9/0075 ,  C21D9/02 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/54 ,  C22C38/60 ,  F16F1/14

Abstract: This stabilizer (1) is formed using a solid metal rod, is for suppressing left/right wheel displacement, and is provided extending in the vehicle width direction. The diameter of a torsion section (1a) that twist-deforms is 10-32 mm. The stabilizer has a chemical composition including at least 0.15%-0.39% by mass C and including at least Mn, B, and Fe. At least 90% of the metal structure thereof has a martensite structure.

公开(公告)号：EP3231879A4

公开(公告)日：2018-07-18

申请号：EP15867565

申请日：2015-12-07

Applicant: NHK SPRING CO LTD

Inventor： KUWATSUKA SHINICHIRO ,  OKUDAIRA YURIKA ,  TANGE AKIRA ,  OKADA HIDEKI ,  TAKAHASHI KEN

IPC: C21D9/00 ,  B21D47/00 ,  B21D53/88 ,  B24C1/10 ,  B60G21/055 ,  C21D1/60 ,  C21D6/00 ,  C21D7/06 ,  C21D8/06 ,  C21D9/02 ,  C21D9/08 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/54 ,  C22C38/60 ,  F16F1/02 ,  F16F1/14

CPC classification number: C21D9/0068 ,  B21D47/00 ,  B21D53/88 ,  B24C1/10 ,  B60G21/055 ,  B60G2206/724 ,  B60G2206/8103 ,  B60G2206/8402 ,  B60G2206/8403 ,  C21D1/60 ,  C21D6/00 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D7/06 ,  C21D8/06 ,  C21D8/065 ,  C21D9/00 ,  C21D9/0075 ,  C21D9/02 ,  C21D9/08 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/54 ,  C22C38/60 ,  F16F1/02 ,  F16F1/021 ,  F16F1/14 ,  F16F2224/0208 ,  F16F2226/00

Abstract: The present invention provides a production method for stabilizers that enables highly productive production on a compact production line, without performing annealing. This production method for stabilizers is characterized by including: a step in which a steel rod material including at least Mn, B, Fe, and 0.15-0.39 mass% of C is bent and molded into a product shape; and a step in which the steel rod material is tempered using a medium that has thermal conductivity that is at least equivalent to water or similar to water.

公开(公告)号：EP3222872A4

公开(公告)日：2018-08-01

申请号：EP15860188

申请日：2015-11-10

Applicant: NHK SPRING CO LTD

Inventor： CHIHARA HIDENORI ,  TSUJI HIROTO ,  KUWATSUKA SHINICHIRO

IPC: F16F1/18 ,  B21D19/00 ,  B21D53/00 ,  B60G11/02 ,  B60G11/04 ,  C21D9/02 ,  F16F1/02

CPC classification number: B60G11/04 ,  B21D19/00 ,  B21D19/12 ,  B21D53/00 ,  B21D53/886 ,  B60G11/107 ,  B60G11/12 ,  B60G2200/31 ,  B60G2202/112 ,  B60G2204/121 ,  B60G2206/84 ,  B60G2206/91 ,  C21D9/02 ,  C21D2221/01 ,  F16F1/18 ,  F16F1/26 ,  F16F3/023 ,  F16F2226/02

Abstract: A leaf spring device (1) includes a main leaf (20) made of a steel plate including an elastic section (20b) configured to generate elastic force when bent; and an eye section (20a) formed in an end portion of the elastic section (20b), the elastic section (20b) and the eye section (20a) being tempered. There is also provided a method for manufacturing the leaf spring device (1). The eye section (20a) is formed by rolling the end of the elastic section (20b) into a circular form. The eye section (20a) is tempered at a higher temperature than the elastic section (20b).