公开(公告)号：JP2009115676A

公开(公告)日：2009-05-28

申请号：JP2007290486

申请日：2007-11-08

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 capable of determining a Weibull slope in a safe and proper range even for a small number of test times, and also protecting the occurrence of conflict in calculation results due to an error of a database by a random simulation, for determining the actual value of the Weibull slope to design and interpret a life test. SOLUTION: The number of tests and the value of Weibull slope are entered. The upper and the lower value of the Weibull slope, which are actual values, are calculated. The calculated results is displayed on the screen of a display device by a computer. In the calculation above, the upper and the lower value of the Weibull slope in accordance with the following equation. Upper value=a(n) U ×e×b(n) U , Lower value=a(n) L ×e×b(n) L . Here, a(n) U , b(n), a(n) L , e×b(n) L are arbitrary regression equations; n: Number of tests, e: entered Weibull slope. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：为了提供一种能够在安全和适当范围内确定威布尔斜率的方法，即使在少量测试时间，并且还保护由于数据库的错误导致的计算结果中的冲突的发生 通过随机模拟，确定威布尔斜率的实际值来设计和解释寿命测试。

解决方案：输入试验次数和威布尔斜率值。 计算Weibull斜率的上下值，它们是实际值。 计算结果由计算机显示在显示装置的屏幕上。 在上面的计算中，Weibull斜率的上下值按照下式计算。 上限值= a（n） U ×e×b（n） U 较低值= a（n） L ×e×b （n） L 。 这里，a（n），b（n），a（n） L ，e×b（n） L 是任意回归 方程式 n：试验次数，e：进入威布尔斜率。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2008196622A

公开(公告)日：2008-08-28

申请号：JP2007033250

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 predicting the service life of material for a rolling bearing in a short period of time with higher accuracy than the conventional method, and also to provide 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 the 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 predicted with higher accuracy than the conventional case by using the service life prediction formula with the frequency distribution of the size of the inclusions classified into kinds as a parameter, without testing a rolling life.
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：为了提供一种用于在比较常规方法更高精度的短时间内预测滚动轴承材料的使用寿命的方法，并且还提供了具有长使用寿命的滚动轴承 并通过使用寿命预测确保。

解决方案：在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，并且通过使用具有频率分布的使用寿命预测公式，预测具有比常规情况更高的精度的滚动轴承材料的使用寿命 将夹杂物的尺寸分类为种类作为参数，而不测试滚动寿命。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2008128699A

公开(公告)日：2008-06-05

申请号：JP2006311168

申请日：2006-11-17

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： FUJITA TAKUMI

IPC: G01M99/00 ,  G01M13/04

Abstract: PROBLEM TO BE SOLVED: To provide a Weibull slope in a safe and proper range, even for few number of test times, when determining a result value of the Weibull slope in order to design or interpret a lifetime test.
SOLUTION: A comparison data group 72 wherein a relation between a value of the Weibull slope of a test result and a dispersion range of the Weibull slope that can take a prescribed possibility to the value of the Weibull slope is determined is stored in a computer 1. The number of tests and the value of the Weibull slope are compared with the comparison data group. The upper limit value and the lower limit value of dispersion of the Weibull slope, corresponding to a Weibull slope of the test result, are read from the comparison data group 72 (means 75). An overlapping range, between the upper limit value and the lower limit value of the dispersion of the Weibull slope, is determined, and the upper limit value and the lower limit value of the overlapping range are determined, as a range of the Weibull slope estimated from the test result, to thereby perform narrowing procedure (means 76).
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：为了设计或解释寿命试验，在确定威布尔斜率的结果值时，即使在几个测试时间内，也能在安全适当的范围内提供威布尔斜率。

解决方案：比较数据组72，其中确定测试结果的威布尔斜率的值与可以采用规定可能性的威布尔斜率的分散范围与威布尔斜率值之间的关系被存储在 计算机1.将测试次数和威布尔斜率的值与比较数据组进行比较。 从比较数据组72（装置75）中读取对应于测试结果的威布尔斜率的威布尔斜率的上限值和下限值。 确定威布尔斜率的色散的上限值和下限值之间的重叠范围，并且确定重叠范围的上限值和下限值，作为估计的威布尔斜率的范围 从测试结果，从而执行缩小过程（装置76）。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2008128696A

公开(公告)日：2008-06-05

申请号：JP2006311136

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 which enables a trial calculation of the necessary number of tests for obtaining calculation life of high reliability simply and rapidly with high reliability even by an unskilled person.
SOLUTION: Random numbers are produced from a certain Weibull distribution (J21) and random numbers are produced from the same Weibull distribution (J22). The life calculated from the produced random numbers is operated to calculate one set of a life ratio (J23). This processing is repeated the set number of times to calculate of the life ratio of the set number of the set number of times to form the probability distribution of this life ratio and a cumulated probability distribution (J24). The processing up to the formation of the cumulated probability distribution is repeated by sequentially changing the number to form a graph showing the relation between the test number and necessary life difference (J25). The number corresponding to the life difference of input data is read from the graph to set a necessary number of tests (J26).
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种方法，其能够即使由非熟练人员也可以以高可靠性简单，快速地获得必要数量的测试以获得高可靠性的计算寿命。 解决方案：随机数是从一定的威布尔分布（J21）产生的，随机数是由相同的威布尔分布（J22）产生的。 从产生的随机数计算的寿命用于计算一组寿命比（J23）。 该处理重复设定次数以计算设定次数的设定次数的寿命比，以形成该寿命比率的概率分布和累积概率分布（J24）。 通过依次改变数量来形成直到形成累积概率分布的处理，以形成示出测试号与必需寿命差之间的关系的曲线图（J25）。 从图中读取与输入数据的寿命差相对应的数字，以设置必要的测试次数（J26）。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2007239044A

公开(公告)日：2007-09-20

申请号：JP2006064463

申请日：2006-03-09

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： FUJITA TAKUMI ,  SUZUKI NOBUYUKI

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

CPC classification number: Y02P10/253

Abstract: PROBLEM TO BE SOLVED: To provide an induction heat-treatment facility with which the temperature control and setting heat-treatment condition can be easily obtained and in the case of being few accumulation of the past producing actual result and even in the case of performing the heat-treatment work with a worker having little experience, the induction heat-treatment can be easily and efficiently be applied. SOLUTION: The induction heat-treatment facility is provided with a carrying device 99B for carrying a material to be treated and the induction hardening apparatus 93 for hardening the material carried with the carrying device 99B by heating with the induction heating. The induction-hardening apparatus 93 contains a hardening temperature control device for adjusting the temperature of the material; a hardening timing control device for adjusting the timing for cooling the heated material; and a memorizing device for hardening, with which transition data of electric source output, output from the electric source for hardening in order to heat the material and data for specifying the timing for cooling the material are memorized. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：提供一种可以容易地获得温度控制和凝固热处理条件的感应热处理设备，并且在过去产生实际结果的积累很少的情况下，甚至在这种情况下 与经验较少的工人进行热处理工作时，可以容易且有效地应用感应热处理。 解决方案：感应热处理设备设置有用于承载待处理材料的搬运装置99B和用感应加热加热使载运装置99B携带的材料硬化的感应淬火装置93。 感应淬火装置93包括用于调节材料的温度的硬化温度控制装置; 用于调节用于冷却被加热材料的时机的硬化定时控制装置; 以及用于硬化的存储装置，记录电源输出的转换数据，从电源输出硬化以加热材料和用于指定用于冷却材料的时间的数据。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2007239039A

公开(公告)日：2007-09-20

申请号：JP2006064249

申请日：2006-03-09

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： FUJITA TAKUMI ,  SUZUKI NOBUYUKI

IPC: C21D1/10 ,  C21D9/40 ,  C21D11/00

CPC classification number: Y02P10/253

Abstract: PROBLEM TO BE SOLVED: To provide an induction-hardening method and an induction-hardening facility with which the temperature control can be easily obtained and the hardening can easily and efficiently be applied and also, a desired heat-treated quality in the wide range of a material to be treated can be given. SOLUTION: The induction-hardening method 10 is provided with a temperature control process 20 and a hardening control process 30. The temperature control process 20 contains a temperature-measuring process 23 for temperature control, a temperature adjusting process 24 and a heating process 22. The hardening control process 30 contains a temperature measuring process 35 for hardening, measuring the high temperature part and the low temperature part in the material to be treated, a cooling timing adjusting process 36 and a cooling process 37. Then, in the cooling timing adjusting process 36, a cooling start signal is output when the temperature history in the high temperature part satisfies the condition in the temperature history so as to become the upper limit value or lower of the desired retained austenite quantity, and the temperature history in the low temperature part is adjusted to the heating time so as to satisfy the condition of the lower limit value or higher of the desired hardness. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：为了提供可以容易地获得温度控制并且可以容易且有效地施加硬化的感应淬火方法和感应淬火设备，并且还可以获得期望的热处理质量 可以给出广泛的待处理材料。 解决方案：感应淬火方法10设置有温度控制过程20和硬化控制过程30.温度控制过程20包含用于温度控制的温度测量过程23，温度调节过程24和加热 硬化控制过程30包括用于硬化，测量待处理材料中的高温部分和低温部分的温度测量过程35，冷却时间调整过程36和冷却过程37.然后，在 冷却时刻调整处理36，当高温部分的温度历史满足温度历史的条件以便成为期望的残余奥氏体量的上限值或更低时，输出冷却开始信号， 将低温部分调节到加热时间，以满足欲望的下限值或更高的条件 d硬度。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2007238974A

公开(公告)日：2007-09-20

申请号：JP2006059685

申请日：2006-03-06

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： FUJITA TAKUMI ,  YAKIDA KAZUHIRO ,  ITO KATSUNORI

IPC: C23C8/02 ,  C21D1/06 ,  C21D1/18 ,  C22C38/00 ,  C22C38/18 ,  C23C8/14 ,  C23C8/22 ,  C23C8/80

Abstract: PROBLEM TO BE SOLVED: To provide a carburizing method by which the occurrence of uneven carburization and the degradation in surface hardness can be suppressed, and to provide a carburized component manufactured by using the method.
SOLUTION: The carburizing method comprises: an oxidizing process (S1) of forming an oxide film on the surface of the steel containing ≥3.5 mass% Cr; a carburizing process (S2) of carburizing the steel; a removal process (S3) of removing the oxide film from the surface of the steel; and a hardening process (S4) of hardening the steel.
COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：提供可以抑制不均匀渗碳的发生和表面硬度的降低的渗碳方法，并提供通过使用该方法制造的渗碳部件。 解决方案：渗碳方法包括：在含有≥3.5质量％Cr的钢的表面上形成氧化膜的氧化工艺（S1） 使钢渗碳的渗碳工序（S2）; 从钢表面除去氧化膜的除去工序（S3） 和硬化处理（S4）。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2007077425A

公开(公告)日：2007-03-29

申请号：JP2005263846

申请日：2005-09-12

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： FUJITA TAKUMI

IPC: C23C8/22 ,  C21D1/06 ,  C21D1/773 ,  C21D9/40 ,  C22C38/00 ,  C22C38/46 ,  F16C33/32 ,  F16C33/62 ,  F16C33/64

Abstract: PROBLEM TO BE SOLVED: To provide a carburizing method by which the generation of an excessively carburized structure in a carburized member comprising steel containing Cr in a content of ≥3.5 mass%, especially in a corner part of the carburized member can be suppressed. SOLUTION: The carburizing method comprises a formed member preparing process for preparing a formed member comprising steel containing Cr in a content of ≥3.5 mass%, and a vacuum carburizing process for reducing the pressure in a furnace to reduce the amount of oxygen in the atmosphere in the furnace, then allowing a carburizing gas to flow in the furnace to make the inside of the furnace into an atmosphere in which the carburizing treatment can be performed, and subjecting the formed member to a carburizing treatment in the chamber. The vacuum carburizing process comprises a temperature-raising step for raising the temperature of the formed member to a temperature at which the formed member can be carburized and a carburizing step for executing carburizing of the formed member whose temperature is raised to the temperature at which the formed member is carburized in the temperature-raising step. In the carburizing step, the carburizing is carried out at 850-940°C. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 解决的问题：提供一种渗碳方法，其中，含碳含量≥3.5质量％的含碳钢的渗碳构件中产生过度渗碳的结构，特别是在渗碳部件的角部，可以是 抑制。 解决方案：渗碳方法包括用于制备包含含量≥3.5质量％的Cr的钢的成形构件的成形构件制备方法和用于降低炉中的压力以减少氧气量的真空渗碳方法 在炉中的气氛中，然后使渗碳气体在炉内流动，使炉内进入能够进行渗碳处理的气氛，并对成形体进行室内渗碳处理。 真空渗碳方法包括将成形部件的温度升高到成形部件可以被渗碳的温度的升温工序，以及将温度升高到成形部件的温度的渗碳工序的渗碳工序， 成型部件在升温工序中进行渗碳。 在渗碳步骤中，渗碳在850-940℃下进行。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2006291248A

公开(公告)日：2006-10-26

申请号：JP2005110122

申请日：2005-04-06

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： MAEDA KIKUO ,  FUJITA TAKUMI

IPC: C21D9/40 ,  C21D1/10 ,  C21D1/18 ,  C21D1/42 ,  C21D11/00 ,  F16C33/64 ,  H05B6/06 ,  H05B6/10

CPC classification number: Y02P10/253

Abstract: PROBLEM TO BE SOLVED: To provide a method and equipment for high frequency induction heat treatment which achieve restraining of deformation of a material to be treated and achieve severe temperature control, and a thin member having restrained deformation and stabilized quality and to inexpensively provide a thrust bearing having long life and stable quality. SOLUTION: The method for high frequency induction heat-treatment is provided with a temperature control process for hardening, a hardening timing control process, and a hardening cooling process. The temperature control process for hardening includes a heating process for hardening, a temperature measuring process for controlling the hardening temperature and a temperature adjusting process for hardening. The hardening timing control process includes a temperature measuring process for controlling hardening timing and a hardening timing adjusting process. In the hardening cooling process, the cooling is performed while restricting the material to be treated by using a die. The cooling is performed by using the die as the cooling member for removing the heat from the material to be treated to thereby cool the material to be treated from a temperature of ≥A c1 point to a temperature ≤M s point. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：提供一种高频感应热处理方法和设备，其实现抑制待处理材料的变形并实现严格的温度控制，以及具有约束变形和稳定质量并且成本低廉的薄构件 提供寿命长，质量稳定的推力轴承。 解决方案：用于高频感应​​热处理的方法具有用于硬化的温度控制过程，硬化定时控制过程和硬化冷却过程。 用于硬化的温度控制过程包括用于硬化的加热过程，用于控制硬化温度的温度测量过程和用于硬化的温度调节过程。 硬化正时控制处理包括用于控制硬化定时的温度测量处理和硬化定时调整过程。 在硬化冷却过程中，在通过使用模具限制被处理材料的同时进行冷却。 通过使用模具作为用于从待处理材料除去热量的模具作为冷却构件，从而将待处理材料从≥A c1 的温度点降温至≤M 取值点。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2006083412A

公开(公告)日：2006-03-30

申请号：JP2004267180

申请日：2004-09-14

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： FUJITA TAKUMI ,  SUZUKI NOBUYUKI

IPC: C21D1/10 ,  C21D11/00

CPC classification number: Y02P10/253

Abstract: PROBLEM TO BE SOLVED: To provide a high-frequency completely-hardening method with the use of temperature control, in order to provide a predetermined quality after heat treatment. SOLUTION: The induction heat treatment device is directed at heating the surface layer of the article to be treated with a high-frequency power and quench-hardening the surface layer; and comprises a temperature control means for adjusting the temperature of the article to be heated, and a quenching means. The temperature control means comprises: a heating means for heating the article to be treated by the high-frequency power; a temperature-measuring means for controlling the temperature, which measures the temperature of a part to be heated by the heating means. The temperature control means is connected to the temperature-measuring means, and outputs a temperature control signal to the heating means on the basis of temperature information sent from the temperature-measuring means. The quenching means preferably has: a temperature-measuring means for quenching, which measures the temperature of the portion far from the portion to be heated by the heating means; and a heat treatment adjusting means which is connected to the temperature-measuring means, adjusts a heat treatment period of time on the basis of the temperature information sent from the temperature-measuring means, and outputs the quenching-starting signal. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了提供使用温度控制的高频完全硬化方法，以便在热处理之后提供预定的质量。 解决方案：感应加热处理装置是以高频功率加热待处理物品的表层，淬火表面层; 并且包括用于调节待加热物品的温度的温度控制装置和淬火装置。 温度控制装置包括：加热装置，用于通过高频功率加热被处理物品; 用于控制温度的温度测量装置，其测量由加热装置加热的部件的温度。 温度控制装置连接到温度测量装置，并且基于从温度测量装置发送的温度信息将温度控制信号输出到加热装置。 淬火装置优选具有：用于淬火的温度测量装置，其测量远离加热装置的待加热部分的部分的温度; 以及与所述温度测量装置连接的热处理调节装置，基于从所述温度测量装置发送的温度信息来调节热处理时间段，并输出所述淬灭开始信号。 版权所有（C）2006，JPO＆NCIPI