公开(公告)号：US10995811B2

公开(公告)日：2021-05-04

申请号：US16088665

申请日：2017-03-30

Applicant: NHK SPRING Co., Ltd.

Inventor： Toshinori Watanabe ,  Hidemasa Ito ,  Noritoshi Takamura ,  Fumio Yamamoto ,  Fumio Takahashi

IPC: F16F1/04 ,  F16F1/06

Abstract: The present invention provides a coil spring, in which a corresponding portion is provided at an end portion in a direction of a coil axis, the corresponding portion having a whole size in the direction of the coil axis of the plurality of wire materials adjacent to each other in the direction of the coil axis equal to a maximum value of a gap in the direction of the coil axis between wire materials adjacent to each other in the direction of the coil axis of the coil spring, a gap in the direction of the coil axis between the corresponding portion and a wire material adjacent to the corresponding portion on an inner side in the direction of the coil axis is smaller than a wire height in an active coil portion of the coil spring, and at the end portion of the direction of the coil axis, a gap in the direction of the coil axis between a portion extending around the coil axis from the corresponding portion to a distal end portion side of the wire material and a wire material adjacent to the portion on the inner side in the direction of the coil axis gradually decreases from the corresponding portion toward the distal end portion side of the wire material around the coil axis.

公开(公告)号：US09593731B2

公开(公告)日：2017-03-14

申请号：US14374320

申请日：2013-01-30

Applicant: NHK SPRING CO., LTD.

Inventor： Noritoshi Takamura ,  Fumio Takahashi

IPC: C22C38/34 ,  C22C38/38 ,  F16F1/34 ,  B21D11/10 ,  C21D9/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/08 ,  F16F1/02 ,  B23K26/26 ,  B23P15/00 ,  B21F35/04 ,  B23K26/32 ,  C22C38/04 ,  C22C38/18 ,  B21D53/16

CPC classification number: F16F1/34 ,  B21D11/10 ,  B21D53/16 ,  B21F35/04 ,  B23K26/26 ,  B23K26/32 ,  B23K2101/32 ,  B23K2103/04 ,  B23K2103/50 ,  B23P15/00 ,  C21D6/008 ,  C21D9/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/18 ,  C22C38/34 ,  C22C38/38 ,  F16F1/027 ,  F16F2226/048

Abstract: An inexpensive ring spring having high strength and a method for producing the same, are provided. The ring spring can be obtained, for example, by raw material preparation, bending formation, welding, and disk formation performed in this order. The ring spring is formed to have no edge by welding two edge parts of the raw material, and has a welded metal part that is formed at the interface of the two edge parts of the raw material, and a welded heat-affected zone that is formed around the welded metal part and heated by welding, and exhibits tensile strength of 1000 MPa or more. Since the ring spring has sufficient tensile strength as a disk spring and a wave spring, quenching and tempering are not necessary. Furthermore, since the product can be prevented from being deformed due to quenching and tempering, dimensional accuracy of the product can be improved.

Abstract translation: 提供了一种具有高强度的便宜的环形弹簧及其制造方法。 环形弹簧可以例如通过原料制备，弯曲形成，焊接和盘形来获得。 环形弹簧通过焊接原材料的两个边缘部分而形成为没有边缘，并且具有形成在原材料的两个边缘部分的界面处的焊接金属部分和焊接的热影响区域 形成在焊接金属部件周围并通过焊接加热，并显示出1000MPa以上的拉伸强度。 由于环形弹簧作为盘簧和波形弹簧具有足够的拉伸强度，因此不需要淬火和回火。 此外，由于可以防止产品由于淬火和回火而变形，所以可以提高产品的尺寸精度。

公开(公告)号：US12006994B2

公开(公告)日：2024-06-11

申请号：US17754667

申请日：2020-10-15

Applicant: NIPPON STEEL CORPORATION ,  NHK SPRING CO., LTD. ,  NIPPON STEEL SG WIRE CO., LTD.

Inventor： Shinya Teramoto ,  Yutaka Neishi ,  Michimasa Aono ,  Shuji Kozawa ,  Fumio Takahashi ,  Shigekazu Nishimoto ,  Mitsuhiro Kondo ,  Tatsuro Ochi ,  Shoichi Suzuki

IPC: F16F1/02 ,  C21D1/18 ,  C21D1/30 ,  C21D6/00 ,  C21D8/00 ,  C21D9/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C23C8/26

CPC classification number: F16F1/021 ,  C21D1/18 ,  C21D1/30 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D9/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C23C8/26 ,  C22C2202/02 ,  F16F2224/02

Abstract: A valve spring includes a nitrided layer, and a core portion that is further inward than the nitrided layer. A chemical composition of the core portion consists of, in mass %, C: 0.53 to 0.59%, Si: 2.51 to 2.90%, Mn: 0.70 to 0.85%, P: 0.020% or less, S: 0.020% or less, Cr: 1.40 to 1.70%, Mo: 0.17 to 0.53%, V: 0.23 to 0.33%, Ca: 0.0001 to 0.0050%, Cu: 0.050% or less, Ni: 0.050% or less, Al: 0.0050% or less, Ti: 0.050% or less, and N: 0.0070% or less, with the balance being Fe and impurities. In the core portion, a number density of V-based precipitates having a maximum diameter ranging from 2 to 10 nm is 500 to 8000 per μm2, and in the core portion, a numerical proportion of Ca sulfides with respect to a total number of oxide-based inclusions and sulfide-based inclusions is 0.20% or less.

公开(公告)号：US20140367902A1

公开(公告)日：2014-12-18

申请号：US14374320

申请日：2013-01-30

Applicant: NHK SPRING CO., LTD.

Inventor： Noritoshi Takamura ,  Fumio Takahashi

IPC: F16F1/34 ,  B21F35/04

CPC classification number: F16F1/34 ,  B21D11/10 ,  B21D53/16 ,  B21F35/04 ,  B23K26/26 ,  B23K26/32 ,  B23K2101/32 ,  B23K2103/04 ,  B23K2103/50 ,  B23P15/00 ,  C21D6/008 ,  C21D9/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/18 ,  C22C38/34 ,  C22C38/38 ,  F16F1/027 ,  F16F2226/048

Abstract: An inexpensive ring spring having high strength and a method for producing the same, are provided. The ring spring can be obtained, for example, by raw material preparation, bending formation, welding, and disk formation performed in this order. The ring spring is formed to have no edge by welding two edge parts of the raw material, and has a welded metal part that is formed at the interface of the two edge parts of the raw material, and a welded heat-affected zone that is formed around the welded metal part and heated by welding, and exhibits tensile strength of 1000 MPa or more. Since the ring spring has sufficient tensile strength as a disk spring and a wave spring, quenching and tempering are not necessary. Furthermore, since the product can be prevented from being deformed due to quenching and tempering, dimensional accuracy of the product can be improved.

Abstract translation: 提供了一种具有高强度的便宜的环形弹簧及其制造方法。 环形弹簧可以例如通过原料制备，弯曲形成，焊接和盘形来获得。 环形弹簧通过焊接原材料的两个边缘部分而形成为没有边缘，并且具有形成在原材料的两个边缘部分的界面处的焊接金属部分和焊接的热影响区域 形成在焊接金属部件周围并通过焊接加热，并显示出1000MPa以上的拉伸强度。 由于环形弹簧作为盘簧和波形弹簧具有足够的拉伸强度，因此不需要淬火和回火。 此外，由于可以防止产品由于淬火和回火而变形，因此可以提高产品的尺寸精度。

公开(公告)号：US12181012B2

公开(公告)日：2024-12-31

申请号：US17754566

申请日：2020-10-15

Applicant: NIPPON STEEL CORPORATION ,  AISIN CORPORATION ,  NHK SPRING CO., LTD. ,  NIPPON STEEL SG WIRE CO., LTD.

Inventor： Shinya Teramoto ,  Yutaka Neishi ,  Michimasa Aono ,  Shuji Kozawa ,  Yoichi Oi ,  Naoki Takabayashi ,  Junji Tanaka ,  Fumio Takahashi ,  Shigekazu Nishimoto ,  Mitsuhiro Kondo ,  Tatsuro Ochi ,  Shoichi Suzuki

IPC: C21D1/06 ,  C21D1/30 ,  C21D6/00 ,  C21D8/06 ,  C21D9/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C23C8/26 ,  F16F1/02 ,  F16F1/04

Abstract: A damper spring having an excellent fatigue limit is provided. A damper spring according to the present embodiment includes a nitrided layer formed in an outer layer, and a core portion that is further inward than the nitrided layer. The chemical composition of the core portion consists of, in mass %, C: 0.53 to 0.59%, Si: 2.51 to 2.90%, Mn: 0.70 to 0.85%, P: 0.020% or less, S: 0.020% or less, Cr: 1.40 to 1.70%, Mo: 0.17 to 0.53%, V: 0.23 to 0.33%, Cu: 0.050% or less, Ni: 0.050% or less, Al: 0.0050% or less, Ti: 0.050% or less, N: 0.0070% or less, and Nb: 0 to 0.020%, with the balance being Fe and impurities. In the core portion, a number density of V-based precipitates having a maximum diameter ranging from 2 to 10 nm is 500 to 8000 pieces/μm2.