公开(公告)号：JP2003013970A

公开(公告)日：2003-01-15

申请号：JP2001195749

申请日：2001-06-28

Applicant: Ntn Corp ,  エヌティエヌ株式会社

Inventor： TAMADA KENJI ,  FUJITA TAKUMI ,  MAEDA KIKUO

IPC: F16C33/64 ,  F16C19/30 ,  F16C19/46

Abstract: PROBLEM TO BE SOLVED: To provide a thrust needle bearing having a small amount of wear and a superior flaking-resistant life under severe operating conditions.
SOLUTION: In the thrust needle bearing having a rolling body 2 and raceway rings 1A and 1B kept in contact with the rolling body 2, carbide is extracted in a range from 10,000 pieces/mm
2 or more to less than 40,000 pieces/mm
2 at least on the surface layers of the raceway rings.
COPYRIGHT: (C)2003,JPO

Abstract translation: 要解决的问题：提供一种在严苛的工作条件下具有少量磨损和优异的防剥落寿命的推力滚针轴承。 解决方案：在具有滚动体2的滚动轴承和与滚动体2保持接触的滚道环1A和1B的推力滚针轴承中，将碳化物从10,000个/ mm 2以上至小于40,000个/ mm 至少在滚道环的表面层上。

公开(公告)号：JP2008128683A

公开(公告)日：2008-06-05

申请号：JP2006310921

申请日：2006-11-17

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： FUJITA TAKUMI

IPC: G01N17/00 ,  G01M13/04

Abstract: PROBLEM TO BE SOLVED: To provide a method for accurately performing the interpretation of the design and test result of a life test by anyone without relying on experience. SOLUTION: The method includes a designing step S1 of determining the values of an ending time becomes a criterion of life, life difference, a test number, etc. and a decision step S3 of deciding interpretation items such as the life of a test target product, significance, life difference, etc. The designing step include a step S11 of producing Weibull random numbers according to a predetermined Weibull distribution corresponding to the test target product by numbers decided as a test number, a step S13 of repeating a step S12 of analyzing the Weibull random numbers, a step S14 of calculating the probability distribution of a predetermined item obtained by the repetition of the step S12 and a step S15 of determining the designing content on the basis of the probability distribution. The decision step includes a step S31 of producing the Weibull random numbers by the test number corresponding to the test results, a step S33 of repeating a step S32 of analyzing the produced Weibull random numbers and a step S34 of calculating the probability distribution of a predetermined item obtained by the repetition of the step S32 of making decision on the basis of the probability distribution. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种在不依赖经验的情况下准确地执行任何人的生活测试的设计和测试结果的解释的方法。 解决方案：该方法包括：确定结束时间的值的设计步骤S1成为生命的标准，寿命差，测试次数等，以及决定步骤S3，决定解释项目如 测试目标产品，意义，寿命差等。设计步骤包括根据由测试目标产品对应的预定威布尔分布产生Weibull随机数的步骤S11，其被确定为测试号码，步骤S13重复步骤 S12分析威布尔随机数，计算通过重复步骤S12获得的预定项目的概率分布的步骤S14，以及基于概率分布确定设计内容的步骤S15。 决定步骤包括通过对应于测试结果的测试号码产生威布尔随机数的步骤S31，重复分析所产生的威布尔随机数的步骤S32的步骤S33，以及计算预定的威布尔随机数的概率分布的步骤S34 通过重复基于概率分布进行判定的步骤S32获得的项目。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2007239043A

公开(公告)日：2007-09-20

申请号：JP2006064453

申请日：2006-03-09

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： FUJITA TAKUMI

IPC: C21D1/10 ,  C21D1/18 ,  C21D1/70 ,  C21D9/40 ,  C21D11/00 ,  C23C8/14 ,  C23C8/42 ,  H05B6/06 ,  H05B6/10

CPC classification number: Y02P10/253

Abstract: PROBLEM TO BE SOLVED: To provide an induction heat-treatment method by which the temperature control can be easily obtained and the condition setting of the heat-treatment is easily performed and also, the quality in the treating material can be stabilized and to provide an induction heat-treated article with which a manufacturing cost is restrained and the quality is stabilized. SOLUTION: The induction-hardening method is provided with a surface stabilizing process 11 for forming the stabilized layer of higher oxidizing resistance than the treating material 1 on the surface of the treating material 1 in the temperature zone heated to the treating material 1 and a hardening process 10, with which the treating material 1 forming the stabilized layer in the surface stabilizing process 11 is hardened. Then, the hardening process 10 contains a temperature control process 20, with which the temperature of the treating material 1 forming the stabilized layer is adjusted, and a hardening control process 30 for cooling the treating material 1 by deciding the controlling cooling timing to the treating material 1. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：提供一种感应热处理方法，通过该方法可以容易地获得温度控制，并且易于进行热处理的条件设定，并且还可以稳定处理材料的质量， 以提供抑制制造成本并且质量稳定的感应热处理制品。 解决方案：在加热到处理材料1的温度区域中，在处理材料1的表面上形成具有比处理材料1更高的耐氧化性的稳定层的表面稳定化方法11。 以及在表面稳定化工序11中形成稳定层的处理材料1硬化的硬化工序10。 然后，硬化处理10包含温度控制处理20，调整形成稳定层的处理材料1的温度，以及硬化控制处理30，用于通过决定对处理材料1的控制冷却时间来冷却处理材料1 材料1.版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2006152430A

公开(公告)日：2006-06-15

申请号：JP2005171376

申请日：2005-06-10

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： FUJITA TAKUMI ,  SUZUKI NOBUYUKI

IPC: C21D1/10 ,  C21D11/00 ,  H05B6/06 ,  H05B6/10

CPC classification number: Y02P10/253

Abstract: PROBLEM TO BE SOLVED: To provide a high frequency heat treatment method with which the hardening can be performed by satisfying the condition of solid solution quantity of C and residual austenite quantity at temperature control side can be estimated. SOLUTION: This high frequency heat treatment method is provided with a temperature control means for controlling the temperature of an object 1 to be heated and a hardening control means for controlling the hardening timing. A calculation of the solid-state of carbon for deciding the starting timing of the hardening, is obtained from the following calculation formula. dC/(dt)=Dd 2 C/(dx 2 ), D=D 0 exp(-Q/RT). Wherein, d: partial differential symbol, D: diffusion constant, C: carbon concentration (mass%), t: time (sec), x: distance, D 0 : entropy term in diffusion constant, Q: activating energy, R: gas constant and T: absolute temperature (K). COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了提供可以估计通过满足C的固溶量和温度控制侧的残余奥氏体量的条件来进行硬化的高频热处理方法。 解决方案：该高频热处理方法设置有用于控制待加热物体1的温度的温度控制装置和用于控制硬化正时的硬化控制装置。 用于决定硬化起动时刻的碳固体的计算由以下计算公式求得。 dC /（dt）= Dd 2 C /（dx 2 ），D = D 0 exp（-Q / RT）。 其中，d：偏微分符号，D：扩散常数，C：碳浓度（质量％），t：时间（sec），x：距离，D 0 ：扩散常数中的熵项，Q ：活化能，R：气体常数，T：绝对温度（K）。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2006124791A

公开(公告)日：2006-05-18

申请号：JP2004316020

申请日：2004-10-29

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： FUJITA TAKUMI ,  SUZUKI NOBUYUKI

IPC: C21D1/10 ,  C21D11/00 ,  H05B6/06

CPC classification number: Y02P10/253

Abstract: PROBLEM TO BE SOLVED: To provide a high-frequency heat treatment method by which the quality of an article can be stabilized by accurately calculating diffused length of C while considering the change of austenizing temperature at the time of rapid heating. SOLUTION: The high-frequency heat treatment method is includes: a temperature control process for controlling the temperature of a material 1 to be heat-treated; and a hardening control process for controlling the hardening timing. A relation of the variation in the heating transformation point to the variation in the temperature rising speed in the composition of the material 1 to be treated is beforehand investigated, and the heating transformation point is obtained from the temperature rising speed at the heating time of the material 1 to be treated on the basis of this relation, and the calculated starting temperature of the diffused length of C for deciding the hardening timing of the material 1 to be treated, is decided on the basis of this heating transformation point. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种高频热处理方法，通过精确计算C的扩散长度，同时考虑到快速加热时的奥氏体化温度的变化，能够使物品的质量稳定。 解决方案：高频热处理方法包括：用于控制待热处理的材料1的温度的温度控制过程; 以及用于控制硬化正时的硬化控制处理。 预先研究加热变形点的变化与待处理材料1的组成中的升温速度的变化的关系，从加热变形点的加热时间的升温速度求出加热变形点 基于该关系进行处理的材料1，以及用于决定待处理材料1的硬化时间的C的​​扩散长度的计算出的开始温度根据该加热变形点来确定。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2015059827A

公开(公告)日：2015-03-30

申请号：JP2013193645

申请日：2013-09-19

Applicant: Ntn株式会社 ,  Ntn Corp ,  Ntn株式会社

Inventor： TOKUDA ATSUSHI ,  FUJITA TAKUMI ,  HASEGAWA NAOYA

IPC: G01K11/00 ,  F22B37/38

Abstract: 【課題】鋼製部品の使用温度だけでなく使用時間も推定することができる鋼製部品の使用温度および使用時間の推定方法を提供する。【解決手段】それぞれ鋼製部品の特定の性状についての分析値と使用温度と使用時間との関係を示す、2つ以上の互いに異なる性状についての関係式を準備する関係式準備過程S1と、使用温度および使用時間の推定対象となる鋼製部品について、前記各関係式における前記各性状の分析値を求める分析過程S2と、この分析過程S2で求めた各性状についての分析値から、前記各関係式を用いて前記鋼製部品の使用温度および使用時間を推定する推定過程S3とを含む。【選択図】図1

Abstract translation: 要解决的问题：提供能够不仅估算使用温度而且可以估计钢构件的使用时间的钢构件的使用温度和使用时间的估计方法。解决方案：使用温度和使用时间的估计方法 钢构件包括：关系式表达式制备步骤S1，其制备具有不同特性的两个或多个关系式，表示分析值，使用温度和使用时间对钢构件的特定特性之间的关系; 获取各关系式的各特性的分析值作为使用温度和使用时间的估计对象的钢部件的分析步骤S2; 以及基于在分析步骤S2中获取的各个特性的分析值，通过使用各个关系式来估计钢部件的使用温度和使用时间的估计步骤S3。

公开(公告)号：JP2014020778A

公开(公告)日：2014-02-03

申请号：JP2012156113

申请日：2012-07-12

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： ITO TAKASHI ,  FUJITA TAKUMI

IPC: G01M13/04

CPC classification number: G01M13/04

Abstract: PROBLEM TO BE SOLVED: To provide a lifetime estimation device and lifetime estimation method of a rolling bearing capable of much more accurately estimating the lifetime of a rolling bearing when an impression is formed by considering a protuberance height at the periphery of the impression.SOLUTION: A lifetime estimation device of a rolling bearing includes: protuberance height estimation means 7 for estimating a protuberance height from a rolling surface of an impression in accordance to a determined rule on the basis of the depth or size of the impression; and lifetime estimation means 8 for estimating the lifetime of the rolling bearing in accordance with a rule determined based on a relation between the estimated protuberance height of the impression and the falling rate of a rolling fatigue lifetime as well as a dynamic equivalent load. The lifetime estimation means 8 calculates the lifetime of the rolling bearing by using an impression correction coefficient corresponding to a contact surface pressure.

Abstract translation: 要解决的问题：提供一种滚动轴承的寿命估计装置和寿命估计方法，其能够通过考虑在印模周边的突起高度来形成印模时能够更准确地估计滚动轴承的寿命。解决方案： 滚动轴承的寿命估计装置包括：突起高度估计装置7，用于根据确定的规则根据印模的深度或尺寸估计来自印模的滚动表面的突起高度; 以及用于根据基于压缩的估计突起高度与滚动疲劳寿命的下降率以及动态等效载荷之间的关系确定的规则来估计滚动轴承的寿命的寿命估计装置8。 寿命估计装置8通过使用对应于接触表面压力的压印校正系数来计算滚动轴承的寿命。

公开(公告)号：JP2012149892A

公开(公告)日：2012-08-09

申请号：JP2011006569

申请日：2011-01-17

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： ITO TAKASHI ,  FUJITA TAKUMI

IPC: G01M13/04

CPC classification number: G01M13/04 ,  G01M13/045

Abstract: PROBLEM TO BE SOLVED: To provide a life estimating device and a life estimating method for roller bearings that enable the remaining useful life of a roller bearing having suffered any indentation to be more accurately estimated with the swell height around the indentation and other relevant factors taken into consideration.SOLUTION: A life estimating device 1, intended for estimating the remaining useful lives of roller bearings each having inner and outer rings and a plurality of rolling elements intervening between the roll-running faces of these inner and outer rings, has swell height estimating means 7 that estimates in accordance with prescribed rules the height of a swell of an indentation from the roll-running face of either the inner or outer ring on the basis of the depth or size of the indentation formed into the roll-running face and life estimating means 8 that estimates in accordance with prescribed rules from a relationship between the estimated swell height around the indentation and the shortening rate of the remaining life due to roll-running fatigue and from an equivalent load.

Abstract translation: 要解决的问题：提供一种用于滚子轴承的寿命估计装置和寿命估计方法，其能够使具有任何压痕的滚子轴承的剩余使用寿命更精确地估计，其中压痕周围的膨胀高度等 考虑相关因素。 解决方案：用于估计每个具有内圈和外圈的滚动轴承和介于这些内圈和外圈的滚动面之间的多个滚动元件的剩余使用寿命的寿命估计装置1具有膨胀高度 估计装置7根据规定的规则，基于形成在滚动滚动面中的凹坑的深度或尺寸，根据内圈或外圈的滚动滚动面的凹槽的膨胀高度来估计;以及 寿命估计装置8，根据规定的规则根据压痕周围的估计膨胀高度和由于滚动疲劳引起的剩余寿命缩短率与等效载荷之间的关系进行估计。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2009221593A

公开(公告)日：2009-10-01

申请号：JP2008258557

申请日：2008-10-03

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： FUJITA TAKUMI ,  OBAYASHI KOSUKE

IPC: C21D9/40 ,  C22C38/00 ,  C22C38/46 ,  F01L1/18 ,  F16C33/34 ,  F16C33/62 ,  F16C33/64

CPC classification number: F16C19/46 ,  C21D1/10 ,  C21D1/25 ,  C21D1/42 ,  C21D6/002 ,  C21D6/02 ,  C21D6/04 ,  C21D9/40 ,  C22C38/36 ,  F01L1/14 ,  F01L1/16 ,  F01L1/18 ,  F01L2101/00 ,  F01L2103/00 ,  F01L2105/00 ,  F01L2105/02 ,  F16C33/34 ,  F16C33/62 ,  F16C2360/18 ,  Y02P10/253

Abstract: PROBLEM TO BE SOLVED: To provide a roller follower and a valve gear device having sufficiently improved durability. SOLUTION: The roller follower includes a roller ring 11, a shaft 12 and a plurality of rollers 13. At least one of the roller ring 11, the shaft 12 and the rollers 13 is a steel member constituted of a steel composed of 0.7-2.4% carbon, 10.0-20.0% chromium and the balance iron with impurities. In the rolling surface of the steel member (roller-ring surface 11A, shaft rolling surface 12A and roller rolling surface 13A), carbide having an area of ≥12.6 μm 2 , containing at least either of iron or chromium and carbon, is generated in an areal proportion of ≥5.0%. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供具有足够改善的耐久性的滚子从动件和阀齿轮装置。 解决方案：滚子从动件包括滚子环11，轴12和多个滚子13.滚子环11，轴12和滚子13中的至少一个是由钢构成的钢构件， 0.7-2.4％碳，10.0-20.0％铬，余量铁与杂质。 在钢构件（滚子表面11A，轴滚动面12A和滚子滚动面13A）的滚动面中，具有≥12.6μm 2 的面积的碳化物，至少含有铁或 铬和碳，以≥5.0％的面积比例产生。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2008196623A

公开(公告)日：2008-08-28

申请号：JP2007033277

申请日：2007-02-14

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： YAKIDA KAZUHIRO ,  FUJITA TAKUMI

IPC: F16C19/52 ,  G01M99/00

Abstract: PROBLEM TO BE SOLVED: To provide a method for stably and accurately predict the service life of material for a rolling bearing in a short period of time, and the rolling bearing having the long service life discriminated and ensured by the service life prediction.
SOLUTION: Image analysis using a color image is performed when measuring the size of the non-metallic inclusions in material for the rolling bearing. Thereby, a plurality of kinds of inclusions having different effects on the service life are separately measured, and the service life of the material for the rolling bearing is stably predicted with higher accuracy than the conventional case by using the service life prediction formula including the maximum size of the inclusions estimated by a method of extreme value statistics on the basis of the frequency distribution of the size of the inclusions classified into kinds, without testing a rolling life.
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种用于在短时间内稳定且准确地预测滚动轴承的材料的使用寿命的方法，并且通过使用寿命预测来判别和确保使用寿命长的滚动轴承 。 解决方案：当测量滚动轴承材料中的非金属夹杂物的尺寸时，执行使用彩色图像的图像分析。 因此，分别测量对使用寿命具有不同影响的多种夹杂物，并且通过使用包括最大值的使用寿命预测公式，通过使用寿命预测公式，比传统情况更稳定地预测滚动轴承材料的使用寿命。 根据分类为种类的夹杂物的尺寸的频率分布，通过极值统计方法估计的夹杂物的尺寸，而不测试滚动寿命。 版权所有（C）2008，JPO＆INPIT