公开(公告)号：EP2835439A1

公开(公告)日：2015-02-11

申请号：EP13773106.3

申请日：2013-04-02

Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) ,  Shinko Metal Products Co., Ltd. ,  NHK Spring Co., Ltd.

Inventor： KOCHI, Takuya ,  HATANO, Hitoshi ,  TAMURA, Eiichi ,  TOYOTAKE, Kotaro ,  YAJIMA, Takashi ,  TANGE, Akira

IPC: C22C38/00 ,  C22C38/38 ,  C22C38/58 ,  C21D8/10 ,  C21D9/02 ,  C21D9/08

CPC classification number: F16L9/02 ,  C21D6/008 ,  C21D8/10 ,  C21D9/02 ,  C21D9/08 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/24 ,  C22C38/28 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  F16F1/021

Abstract: A hollow seamless pipe for a high-strength spring in the present invention includes a steel material in which chemical component compositions are properly adjusted, wherein a depth of a whole decarburized layer in an inner surface layer part is 100 µm or less, a depth of a flaw which is present in an inner surface is 40 µm or less, a width of the flaw is 60 µm or less, and a number density of a carbide which has a circle equivalent diameter of 500 nm or more and is present in the inner surface layer part is 1.8×10 -2 particles/µm 2 or less.

Abstract translation: 本发明的高强度弹簧用中空无缝管包括适当调整化学成分组成的钢材，其中，内表面层部的整个脱碳层的深度为100μm以下，深度为 存在于内表面的缺陷为40μm以下，缺陷的宽度为60μm以下，圆当量直径为500nm以上并存在于内部的碳化物的数密度 表层部分为1.8×10 -2粒子/μm2以下。

公开(公告)号：EP2599566B1

公开(公告)日：2017-12-20

申请号：EP11812598.8

申请日：2011-07-28

Applicant: NHK Spring Co., Ltd.

Inventor： KATSUYAMA, Akira ,  MORISHIMA, Takayuki ,  YAJIMA, Takashi ,  MORI, Yuji ,  NUKUI, Kotaro

IPC: B21F3/02 ,  B21F35/00 ,  F16F1/06

CPC classification number: B21F3/02 ,  B21F35/00

Abstract: A coil wire material (30) is bent by a first roll (32), a second roll (34), and a third roll (36). The bent coil wire material (30) is pressed in a screwing direction, to shape a coil spring having a desired diameter and a pitch. A desired pitch can be accurately formed in a manner that a second roll (34) provided on a downstream side of a conveying direction of the coil wire material (30) is configured to be able to move back and forth along the screwing direction of the coil spring and to be tiltable about an axis of rotation parallel to the conveying direction of the coil wire material (30).

公开(公告)号：EP2647449A1

公开(公告)日：2013-10-09

申请号：EP11844526.1

申请日：2011-11-24

Applicant: NHK SPRING CO., LTD.

Inventor： YAJIMA, Takashi ,  MORINO, Kenichiro

IPC: B21D41/04 ,  B21D22/14 ,  B21F35/00 ,  B21H1/18 ,  F16F1/06

CPC classification number: F16F1/042 ,  B21D11/06 ,  B21D22/14 ,  B21D41/045 ,  B21F35/00 ,  Y10T29/49609

Abstract: A hollow coil spring and a method for manufacturing therefor can prevent corrosion at an inner surface and can improve product appearance.
In an end sealing step, an end Wa is sealed by which the core material of the end Wa of a spring member W is gathered by machining. It is preferable that spinning be carried out as a machining. For example, a squeezing roller R is moved in an axial direction as necessary, while the end of the spring member W is pressed to the inside in a radial direction by the squeezing roller R. As a result, the end Wa of the spring member W is sealed as shown in Fig. 3 , and therefore, it is not necessary to use another member such as a lid member. For example, the end sealing step can be immediately carried out after an inner surface processing step. In a coil forming step after the end sealing step, formation of clearance can be prevented at the end Wa, even if the end Wa of the spring member W is gripped and the spring member W is wound around the rod.

Abstract translation: 中空螺旋弹簧及其制造方法可以防止内表面的腐蚀并且可以改善产品外观。 在端部密封步骤中，密封端部Wa，弹簧构件W的端部Wa的芯材通过机械加工而聚集。 优选的是，作为加工进行纺丝。 例如，挤压辊R根据需要沿轴向移动，同时弹簧构件W的端部被挤压辊R沿径向向内侧挤压。结果，弹簧构件的端部Wa W被密封，如图1所示。 因此，不需要使用诸如盖构件的其他构件。 例如，可以在内表面处理步骤之后立即进行端部密封步骤。 在端部密封步骤之后的线圈形成步骤中，即使夹持弹簧构件W的端部Wa并且弹簧构件W缠绕在杆上，也可以在端部Wa处形成间隙。

公开(公告)号：EP2647867B1

公开(公告)日：2017-01-11

申请号：EP11844264.9

申请日：2011-11-24

Applicant: NHK Spring Co., Ltd.

Inventor： YAJIMA, Takashi ,  KATSUYAMA, Akira

IPC: F16F1/02 ,  B24C1/04 ,  B24C1/10 ,  B24C3/02 ,  B24C3/32 ,  B24C9/00 ,  F16F1/06

CPC classification number: B24C1/00 ,  B24C1/10 ,  B24C3/327 ,  F16F1/00

公开(公告)号：EP2599566A1

公开(公告)日：2013-06-05

申请号：EP11812598.8

申请日：2011-07-28

Applicant: NHK Spring Co., Ltd.

Inventor： KATSUYAMA, Akira ,  MORISHIMA, Takayuki ,  YAJIMA, Takashi ,  MORI, Yuji ,  NUKUI, Kotaro

IPC: B21F3/02 ,  B21F35/00 ,  F16F1/06

CPC classification number: B21F3/02 ,  B21F35/00

Abstract: A coil wire material (30) is bent by a first roll (32), a second roll (34), and a third roll (36). The bent coil wire material (30) is pressed in a screwing direction, to shape a coil spring having a desired diameter and a pitch. A desired pitch can be accurately formed in a manner that a second roll (34) provided on a downstream side of a conveying direction of the coil wire material (30) is configured to be able to move back and forth along the screwing direction of the coil spring and to be tiltable about an axis of rotation parallel to the conveying direction of the coil wire material (30).

Abstract translation: 线圈线材（30）由第一辊（32），第二辊（34）和第三辊（36）弯曲。 弯曲的线圈线材（30）以螺纹方向被按压，以形成具有所需直径和间距的螺旋弹簧。 期望的间距可以以使得设置在线圈线材（30）的输送方向的下游侧的第二辊（34）被构造成能够沿着线圈线材的旋转方向前后移动的方式被精确地形成 并且能够绕平行于线圈线材（30）的输送方向的旋转轴线倾斜。

公开(公告)号：EP2835439B1

公开(公告)日：2020-02-19

申请号：EP13773106.3

申请日：2013-04-02

Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) ,  NHK Spring Co., Ltd.

Inventor： KOCHI, Takuya ,  HATANO, Hitoshi ,  TAMURA, Eiichi ,  TOYOTAKE, Kotaro ,  YAJIMA, Takashi ,  TANGE, Akira

IPC: C22C38/00 ,  C22C38/38 ,  C22C38/58 ,  C21D8/10 ,  C21D9/02 ,  C21D9/08 ,  C21D6/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/24 ,  C22C38/28 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

公开(公告)号：EP2647867A1

公开(公告)日：2013-10-09

申请号：EP11844264.9

申请日：2011-11-24

Applicant: Nhk Spring Co., Ltd.

Inventor： YAJIMA, Takashi ,  KATSUYAMA, Akira

IPC: F16F1/02 ,  B24C1/04 ,  B24C1/10 ,  B24C3/02 ,  B24C3/32 ,  B24C9/00 ,  F16F1/06

CPC classification number: B24C1/00 ,  B24C1/10 ,  B24C3/327 ,  F16F1/00

Abstract: A hollow spring and a production method therefor, which can improve the durability and the efficiency of inner surface abrasive blasting for spring material, are provided.
A straight-shaped hollow spring material W is used in a blasting apparatus 100. The length of the spring material W is set to be 1.5 m to 3.5 m, and the inner diameter of the spring material W is set to be not more than 10 mmϕ (not including 0). In inner surface abrasive blasting for the spring material W, first blasting and second blasting are performed in turn. In the first blasting, abrasives are ejected to an opening portion Wa of the spring material W and are suctioned from an opening portion Wb thereof. In the second blasting, the abrasives are ejected to the opening portion Wb of the spring material W and are suctioned from the opening portion Wa thereof. Thus, the inner surface of the spring material W can be prevented from having a trumpet shape. The ejection pressure, the suction pressure, and the like are appropriately set, so that generation of grinding amount difference between the center portion and both end portions of the inner surface of the spring material W can be inhibited.