公开(公告)号：EP2857537B1

公开(公告)日：2018-07-25

申请号：EP13794071.4

申请日：2013-02-25

Applicant: Nippon Steel & Sumitomo Metal Corporation ,  NHK Spring Co., Ltd.

Inventor： ISHITSUKA, Tetsuo ,  KOYUBA, Motofumi ,  IWAMURA, Masamichi ,  TANGE, Akira ,  TAKAHASHI, Ken ,  KURIMOTO, Kiyoshi ,  WAKABAYASHI, Yutaka

IPC: B21C37/08 ,  B60G21/055 ,  C21D8/10 ,  C21D9/08 ,  C22C38/32 ,  B21C51/00 ,  C21D7/06 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C21D7/13 ,  C21D9/50 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/50

CPC classification number: C21D9/50 ,  B21C37/08 ,  B21C51/00 ,  B60G21/055 ,  B60G2206/427 ,  B60G2206/72 ,  C21D7/06 ,  C21D7/13 ,  C21D8/10 ,  C21D8/105 ,  C21D9/08 ,  C21D9/085 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/50 ,  C22C38/54

Abstract: A hollow stabilizer having an excellent fatigue property and higher strength compared to the conventional ones has a chemical composition containing 0.26% to 0.30% of C, 0.05% to 0.35% of Si, 0.5% to 1.0% of Mn, 0.05% to 1.0% of Cr, 0.005% to 0.05% ofTi, 0.0005% to 0.005% of B, and 0.0005% to 0.005% of Ca, wherein; Al, P, S, N, and O are limited to 0.08% or less, 0.05% or less, less than 0.0030%, 0.006% or less, and 0.004% or less, respectively, a remainder of the chemical composition consists of Fe and unavoidable impurities, a value of a product of the Mn content and the S content is 0.0025 or less, and a critical cooling rate Vc90 represented by a predetermined equation is 40°C/s or less; and wherein a metallic structure comprises a tempered martensite, a length of elongated MnS present at a center part in a thickness direction of the hollow stabilizer is 150 µm or less, a HRC is from 40 to 50, a thickness to outer diameter ratio is 0.14 or more, and a depth of a decarburized layer at an inner surface part is 20 µm or less from the inner surface; and a steel pipe for hollow stabilizers used as a material for the hollow stabilizer.

公开(公告)号：EP3438493A1

公开(公告)日：2019-02-06

申请号：EP17775321.7

申请日：2017-03-29

Applicant: NHK Spring Co., Ltd.

Inventor： TANGE, Akira ,  SUGAWARA, Masato ,  WAKABAYASHI, Yutaka

IPC: F16F1/02 ,  B60G21/055 ,  F16F1/14

Abstract: A terminal sealed portion (30) is formed on an end portion of a hollow rod (20) made of steel. An enclosed space (32) is formed on an inner side of the hollow rod (20). At an end of the enclosed space (32), a terminal gap (32a) is formed. A volatile powdered rust inhibitor (70) is supplied in the enclosed space (32). As the volatile powdered rust inhibitor (70) is vaporized, the enclosed space (32) is turned into a rust-inhibiting atmosphere. As the vaporized component of the volatile powdered rust inhibitor (70) is adsorbed to an inner surface (32c) of the enclosed space (32), an inner surface rust-inhibiting film (71) is formed. The vaporized component also enters inside the terminal gap (32a), and forms a terminal rust-inhibiting film (72).

公开(公告)号：EP4454907A1

公开(公告)日：2024-10-30

申请号：EP22911367.5

申请日：2022-12-22

Applicant: NHK Spring Co., Ltd.

Inventor： WAKABAYASHI, Yutaka ,  FUJIMURA, Rintaro ,  KAWAKAMI, Norihiro

IPC: B60G21/055

Abstract: A stabilizer manufacturing method according to the present invention includes forming a first end and a second end of a stabilizer by processing a tubular member, wherein the tubular member includes: a central portion having a tubular shape; a first reduced diameter portion having a tubular shape and provided on one end side of the central portion, the first reduced diameter portion having a wall thickness equivalent to a wall thickness of the central portion and having a diameter smaller than a diameter of the central portion; a second reduced diameter portion having a tubular shape and provided on the other end side of the central portion, the second reduced diameter portion having a wall thickness equivalent to the wall thickness of the central portion and having a diameter smaller than the diameter of the central portion; a first connecting portion having a conical shape and connecting the central portion and the first reduced diameter portion to each other; and a second connecting portion having a conical shape and connecting the central portion and the second reduced diameter portion to each other, the first end and the second end constitutes both ends of the stabilizer and each has a wall thickness equivalent to a wall thickness of a main body of the stabilizer, and the first end and the second end are formed by sandwiching and pressing each of the first reduced diameter portion and the second reduced diameter portion by a pair of first pressing members.

公开(公告)号：EP2216136A1

公开(公告)日：2010-08-11

申请号：EP08851884.0

申请日：2008-11-14

Applicant: NHK Spring Co.,Ltd.

Inventor： TANGE, Akira ,  SUGAWARA, Masato ,  SUMIYOSHI, Isao ,  TAKAHASHI, Ken ,  WAKABAYASHI, Yutaka ,  KAWAI, Masayoshi

IPC: B24C1/10 ,  B24C3/32 ,  B24C5/02

CPC classification number: B24C1/10 ,  B24C3/325 ,  Y10T428/24331

Abstract: The reflection portion 20 of the reflection member 1 is moved along the inner surface in the hole of the pipe W from the entrance opening of the hole of the pipe W to the exit opening of the hole thereof. In this case, the reflection portion 20 is guided by the guide portion 30 provided at both sides of the reflection portion 20. The shots, which are projected toward the inner surface in the hole of the pipe W, reach the reflection portion 20 through the holes of the guide portion 30 of the entrance side, and they are reflected toward the inner surface in the hole of the pipe W. Since the shots can be reflected toward the inner surface inside in the hole of the pipe W, the tendency that shots may be moved toward the inner surface outside in the hole of the curved portion P can be small. Therefore, since thinning of the wall of the pipe W can be performed, the pipe W can be strong, and the weight reduction of the pipe W can be simultaneously performed. As a result, the workability and the versatility can be improved, and the reflection member 1 can be easily used on the inner surface in the hole of the pipe having the curved portion.

Abstract translation: 反射构件1的反射部20沿管W的孔的内表面从管W的孔的入口向其孔的出口开口移动。 在这种情况下，反射部20被设置在反射部20的两侧的引导部30引导。向管W的孔内的内表面突出的射击通过该反射部20到达反射部20 入口侧的引导部分30的孔，并且它们朝向管W的孔中的内表面反射。由于可以在管W的孔内向内表面反射镜头，所以发射的趋势 可以在弯曲部分P的孔内向内表面移动可以很小。 因此，由于可以进行管道壁的变薄，所以能够使配管W牢固，能够同时进行配管W的重量减轻。 结果，可以提高可加工性和多功能性，并且可以容易地将反射构件1用于具有弯曲部分的管的孔中的内表面。

公开(公告)号：EP4501486A1

公开(公告)日：2025-02-05

申请号：EP23779723.8

申请日：2023-03-17

Applicant: NHK Spring Co., Ltd.

Inventor： MORI, Shogo ,  WAKABAYASHI, Yutaka ,  KOGA, Takuo

IPC: B21K21/12 ,  B21J5/10 ,  B21J9/04 ,  B60G21/055 ,  B21D28/16

Abstract: In a method of manufacturing a stabilizer according to the present invention, forging processing is performed on a base material and a stabilizer having a through hole at each of both ends is produced. The method includes: a recess forming step of forming a recess at a through hole formation position for the through hole of the stabilizer at an end of the base material; and a through hole forming step of forming a through hole by performing perforation at the through hole formation position including the recess.

公开(公告)号：EP2857537A1

公开(公告)日：2015-04-08

申请号：EP13794071.4

申请日：2013-02-25

Applicant: Nippon Steel & Sumitomo Metal Corporation ,  NHK Spring Co., Ltd.

Inventor： ISHITSUKA, Tetsuo ,  KOYUBA, Motofumi ,  IWAMURA, Masamichi ,  TANGE, Akira ,  TAKAHASHI, Ken ,  KURIMOTO, Kiyoshi ,  WAKABAYASHI, Yutaka

IPC: C22C38/00 ,  B21C1/00 ,  B21C37/08 ,  B60G21/055 ,  C21D8/10 ,  C21D9/08 ,  C22C38/32 ,  C22C38/54

CPC classification number: C21D9/50 ,  B21C37/08 ,  B21C51/00 ,  B60G21/055 ,  B60G2206/427 ,  B60G2206/72 ,  C21D7/06 ,  C21D7/13 ,  C21D8/10 ,  C21D8/105 ,  C21D9/08 ,  C21D9/085 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/50 ,  C22C38/54

Abstract: A hollow stabilizer having an excellent fatigue property and higher strength compared to the conventional ones has a chemical composition containing 0.26% to 0.30% of C, 0.05% to 0.35% of Si, 0.5% to 1.0% of Mn, 0.05% to 1.0% of Cr, 0.005% to 0.05% ofTi, 0.0005% to 0.005% of B, and 0.0005% to 0.005% of Ca, wherein; Al, P, S, N, and O are limited to 0.08% or less, 0.05% or less, less than 0.0030%, 0.006% or less, and 0.004% or less, respectively, a remainder of the chemical composition consists of Fe and unavoidable impurities, a value of a product of the Mn content and the S content is 0.0025 or less, and a critical cooling rate Vc90 represented by a predetermined equation is 40°C/s or less; and wherein a metallic structure comprises a tempered martensite, a length of elongated MnS present at a center part in a thickness direction of the hollow stabilizer is 150 µm or less, a HRC is from 40 to 50, a thickness to outer diameter ratio is 0.14 or more, and a depth of a decarburized layer at an inner surface part is 20 µm or less from the inner surface; and a steel pipe for hollow stabilizers used as a material for the hollow stabilizer.

Abstract translation: 具有相比于常规的优异的疲劳特性和更高强度的中空稳定器的化学组成包含0.26％至0：C的30％，0.05％至0.35％的Mn，Si组成的0.5％到1.0％，0.05％至1.0％ 的Cr，0.005％至0.05％OFTI，0.0005％至0.005％的B，和Ca，worin的0.0005％〜0.005％; 的Al，P，S，N，和O被限制为0.08％或小于0.05％或更少，小于0.0030％，0.006％或更少，和0.004％或更少的，分别为一Fe的化学组成besteht的剩余部分 和不可避免的杂质，Mn含量和S含量的积的值是0.0025或更小，并且通过预定的式子表​​示的临界冷却速率VC90是40℃/秒或更小; 和worin金属结构包括回火马氏体，在中空稳定器的厚度方向的中央部存在细长的MnS的长度为150微米或更小，一个HRC为40〜50，厚度与外径之比是0:14 以上，并且在面内部的脱碳层的深度为从内表面20微米或更小; 和钢管作为中空稳定用作用于中空稳定的材料。

公开(公告)号：EP2216136B1

公开(公告)日：2015-01-07

申请号：EP08851884.0

申请日：2008-11-14

Applicant: NHK SPRING CO., LTD.

Inventor： TANGE, Akira ,  SUGAWARA, Masato ,  SUMIYOSHI, Isao ,  TAKAHASHI, Ken ,  WAKABAYASHI, Yutaka ,  KAWAI, Masayoshi

IPC: B24C1/10 ,  B24C3/32 ,  B24C5/02

CPC classification number: B24C1/10 ,  B24C3/325 ,  Y10T428/24331