公开(公告)号：USRE40348E1

公开(公告)日：2008-06-03

申请号：US10701020

申请日：2003-11-05

Applicant: Hisato Tokoro ,  Kimio Uchida ,  Kazuo Oda ,  Tsukasa Mikamoto

Inventor： Hisato Tokoro ,  Kimio Uchida ,  Kazuo Oda ,  Tsukasa Mikamoto

IPC: B22F3/00

Abstract: A thin arc segment magnet made of a an R-T-B based, rare earth sintered magnet substantially comprising 28-33 weight % of R and 0.8-1.5 weight % of B, the balance being substantially Fe T, wherein R is at least one rare earth element including Y, and T is Fe or Fe and Co, which has an oxygen content of 0.3 weight % or less, a density of 7.56 g/cm3 or more, a coercivity iHc of 1.1 MA/m (14 kOe) or more at room temperature, and an orientation Br/4πImax of 96% or more in an anisotropy-providing direction at room temperature can be produced by using a slurry mixture formed by introducing fine alloy powder of the above composition into a mixture liquid comprising 99.7-99.99 parts by weight of a mineral oil, a synthetic oil or a vegetable oil and 0.01-0.3 parts by weight of a nonionic surfactant and/or an anionic surfactant.

Abstract translation: 一个由<？delete-start id =“DEL-S-00001”date =“20080603”？> a <？delete-end id =“DEL-S-00001”？> <？insert-start id =“INS-S-00001”date =“20080603”？>基于RTB的<？insert-end id =“INS-S-00001”→稀土烧结磁体，其基本上包含28-33重量％的R和 B的0.8-1.5重量％，余额基本上<？delete-start id =“DEL-S-00002”date =“20080603”？Fe <？delete-end id =“DEL-S-00002”？> <？insert-start id =“INS-S-00002”date =“20080603”？> T <？insert-end id =“INS-S-00002”？>其中，R是至少一个稀土元素，包括Y ，T为Fe，Fe，Co，氧含量为0.3重量％以下，密度为7.56g / cm 3以上，矫顽力iHc为1.1MA / m（14 kOe）以上，并且室温下各向异性提供方向的取向Br / 4piI最大值为96％以上，可以通过使用通过引入细合金粉末形成的浆料混合物 的上述组合物混合成混合物 包含99.7-99.99重量份矿物油，合成油或植物油和0.01-0.3重量份非离子表面活性剂和/或阴离子表面活性剂的液体。

公开(公告)号：US06867583B2

公开(公告)日：2005-03-15

申请号：US10292593

申请日：2002-11-13

Applicant: Akitoshi Mizutani ,  Kenji Takeda ,  Masao Tokunaga ,  Tsutomu Nakamura ,  Keiichi Yasuda ,  Kimio Uchida ,  Hiroshi Takeyama ,  Tetsuo Hariu

Inventor： Akitoshi Mizutani ,  Kenji Takeda ,  Masao Tokunaga ,  Tsutomu Nakamura ,  Keiichi Yasuda ,  Kimio Uchida ,  Hiroshi Takeyama ,  Tetsuo Hariu

IPC: G01B7/00 ,  G01D5/14 ,  G01D11/24 ,  G01B7/14

CPC classification number: G01D5/145 ,  G01D11/245

Abstract: A displacement sensor precisely detects displacement of a moving body in a rectilinear movement direction even if the moving body rotates. The sensor includes a detector and a magnet. The cross sectional area of the permanent magnet in a plane perpendicular to an axis, which extends in the rectilinear movement direction, varies in the direction of movement. The permanent magnet is magnetized in the rectilinear movement direction. The detector is located so that magnetic flux passes through a detection face of the detector substantially perpendicularly.

Abstract translation: 即使移动体旋转，位移传感器精确地检测移动体在直线运动方向上的位移。 传感器包括检测器和磁铁。 在与直线运动方向上延伸的轴线垂直的平面中的永磁体的横截面面积在运动方向上变化。 永磁体在直线运动方向被磁化。 检测器位于使得磁通量基本垂直地穿过检测器的检测面。

公开(公告)号：US06468365B1

公开(公告)日：2002-10-22

申请号：US09417544

申请日：1999-10-14

Applicant: Kimio Uchida ,  Tsunehiro Kawata

Inventor： Kimio Uchida ,  Tsunehiro Kawata

IPC: H01F1053

CPC classification number: H01F1/0577 ,  H01F41/0293

Abstract: An R—T—B sintered permanent magnet having a composition including 28-33 weight % of R, and 0.5-2 weight % of B, the balance being substantially T and inevitable impurities, wherein R is at least one rare earth element including Y, at least one heavy rare earth element selected from the group consisting of Dy, Tb and Ho being indispensable, and T is Fe or Fe and Co, the permanent magnet having a crystal structure comprising first R2T14B-type, main-phase crystal grain particles having a higher heavy rare earth element concentration than that of a crystal grain boundary phase, and second R2T14B-type, main-phase crystal grain particles having a lower heavy rare earth element concentration than that of the crystal grain boundary phase.

Abstract translation: 一种具有28-33重量％R和0.5-2重量％B的组成的RTB烧结永磁体，余量基本上为T和不可避免的杂质，其中R为至少一种包括Y的稀土元素，至少一种 选自Dy，Tb和Ho的重稀土元素是必不可少的，T是Fe或Fe和Co，永磁体具有包括第一R2T14B型的晶体结构，具有较高重量的主相晶粒 稀土元素浓度高于晶界相，而第二种R2T14B型主相晶粒比重晶态晶界相重的稀土元素浓度较低。

公开(公告)号：US06312494B1

公开(公告)日：2001-11-06

申请号：US09610476

申请日：2000-07-05

Applicant: Hisato Tokoro ,  Kimio Uchida ,  Kazuo Oda ,  Tsukasa Mikamoto

Inventor： Hisato Tokoro ,  Kimio Uchida ,  Kazuo Oda ,  Tsukasa Mikamoto

IPC: B22F300

CPC classification number: H01F41/0273 ,  H01F1/0577

Abstract: A thin arc segment magnet made of a rare earth sintered magnet substantially comprising 28-33 weight % of R and 0.8-1.5 weight % of B, the balance being substantially Fe, wherein R is at least one rare earth element including Y, and T is Fe or Fe and Co, which has an oxygen content of 0.3 weight % or less, a density of 7.56 g/cm3 or more, a coercivity iHc of 1.1 MA/m (14 kOe) or more at room temperature, and an orientation Br/4&pgr;Imax of 96% or more in an anisotropy-providing direction at room temperature can be produced by using a slurry mixture formed by introducing fine alloy powder of the above composition into a mixture liquid comprising 99.7-99.99 parts by weight of a mineral oil, a synthetic oil or a vegetable oil and 0.01-0.3 parts by weight of a nonionic surfactant and/or an anionic surfactant.

Abstract translation: 一种由稀土烧结磁体制成的薄弧形磁体，其基本上包含28-33重量％的R和0.8-1.5重量％的B，余量基本上为Fe，其中R是至少一种包括Y的稀土元素，T 是Fe或Fe和Co，其氧含量为0.3重量％以下，密度为7.56g / cm 3以上，室温下的矫顽力iHc为1.1MA / m（14kOe）以上，取向性 室温各向异性提供方向的Br / 4piImax为96％以上可以通过使用通过将上述组成的微细合金粉末引入到包含99.7-99.99重量份的矿物油 ，合成油或植物油，0.01-0.3重量份非离子表面活性剂和/或阴离子表面活性剂。

公开(公告)号：US20090033315A1

公开(公告)日：2009-02-05

申请号：US12181783

申请日：2008-07-29

Applicant: Takashi Kawashima ,  Kimio Uchida ,  Yukinobu Kajita ,  Tatsuya Kitanaka ,  Koichiro Matsumoto ,  Yoshiyuki Kono ,  Hisataka Okado ,  Hiroyuki Shintani

Inventor： Takashi Kawashima ,  Kimio Uchida ,  Yukinobu Kajita ,  Tatsuya Kitanaka ,  Koichiro Matsumoto ,  Yoshiyuki Kono ,  Hisataka Okado ,  Hiroyuki Shintani

IPC: G01B7/00

CPC classification number: G01D5/145

Abstract: A position sensor includes a longitudinally extending permanent magnet member at least two longitudinally extending arc-shaped projecting elements respectively projecting from the opposite ends toward the inside space to confront each other at a distance and a pair of compatible main magnetic sensors disposed in the inside space along the longitudinal axis at an interval so as to generate a pair of output signals when the permanent magnet member shifts along the longitudinal axis. The opposite ends of the permanent magnet member are configured to surround a common inside space and polarized to have opposite magnetic poles so as to provide in the inside space a magnetic field whose magnetic flux density becomes a maximum at a longitudinal center of the inside space and gradually becomes smaller as a position of the inside space shifts from the longitudinal center along a longitudinal axis of the permanent magnet members. The arc-shaped projecting elements are arranged so that the magnetic flux density and each of the output signals can be expressed by a cosine of a shift value from the longitudinal center, and the interval is ¼ of the cycle of the cosine.

Abstract translation: 位置传感器包括纵向延伸的永磁体构件，其至少两个纵向延伸的弧形突起元件，其分别从相对端向内部空间突出以相隔一定距离，并且一对相容的主磁传感器设置在内部空间 沿着纵轴以一定的间隔，以便当永磁体部件沿着纵向轴线移动时产生一对输出信号。 永久磁铁构件的相对端构成为包围共同的内部空间并且被极化以具有相反的磁极，以便在内部空间中提供在内部空间的纵向中心处的磁通密度变为最大的磁场，以及 随着内部空间的位置沿纵向中心沿永久磁铁构件的纵向轴线偏移，逐渐变小。 弧形突出元件被布置成使得磁通密度和每个输出信号可以由来自纵向中心的偏移值的余弦来表示，并且间隔是余弦周期的1/4。

公开(公告)号：US6159308A

公开(公告)日：2000-12-12

申请号：US209426

申请日：1998-12-11

Applicant: Kimio Uchida ,  Masahiro Takahashi

Inventor： Kimio Uchida ,  Masahiro Takahashi

IPC: H01F1/057 ,  H01F1/00

CPC classification number: H01F1/0577

Abstract: A method of producing an R--Fe--B-based, sintered permanent magnet, wherein R is at least one rare earth element including Y, having a small oxygen content. A coarse alloy powder prepared by a reductive diffusion method is milled and recovered into a solvent to form a slurry. The slurry is wet-compacted to form a green body which is then sintered after removing the solvent. The milling, recovering, wet-compacting, solvent-removing and sintering steps are carried out while preventing the powder, slurry and green body from being brought into contact with air to minimize the oxygen content in the final sintered permanent magnet. The sintered permanent magnet produced has a high density and a high magnetic properties due to a low oxygen content.

Abstract translation: 一种R-Fe-B系烧结永磁体的制造方法，其中，R为至少一种含有氧的少量含有Y的稀土元素。 通过还原扩散法制备的粗合金粉末被研磨并回收到溶剂中以形成浆料。 将浆料湿式压实以形成生坯，然后在除去溶剂之后烧结。 进行研磨，回收，湿式压实，溶剂去除和烧结步骤，同时防止粉末，浆料和生坯与空气接触，以最小化最终烧结永磁体中的氧含量。 所生产的烧结永磁体由于氧含量低而具有高密度和高磁性能。

公开(公告)号：US4837109A

公开(公告)日：1989-06-06

申请号：US71937

申请日：1987-07-10

Applicant: Masaaki Tokunaga ,  Kimio Uchida ,  Akitoshi Hiraki

Inventor： Masaaki Tokunaga ,  Kimio Uchida ,  Akitoshi Hiraki

IPC: H01F7/00 ,  C22C1/00 ,  H01F1/00 ,  H01F1/057

CPC classification number: C22C1/00 ,  H01F1/0573

Abstract: A method of producing a neodymium-iron-boron permanent magnet alloy having a composition of 25.0-50.0 weight % of neodymium, 0.3-5.0 weight % of boron and balance substantially iron, including the steps of adding metal calcium, calcium hydride or a mixture thereof as a reducing agent to neodymium fluoride, iron and boron (or ferroboron), and further adding thereto at least one of calcium chloride, sodium chloride and potassium chloride as a flux, melting the resulting mixture in an inert gas atmosphere, or in a reducing gas atmosphere or substantially in vacuum at 1,000.degree.-1,300.degree. C., thereby reducing said neodymium fluoride to provide said alloy with as small a calcium content as 0.1 weight % or less. The starting materials may contain dysprosium fluoride and niobium to provide Nd-Dy-Fe-B-Nb alloys containing 0.5-15.0 weight % Dy and 0.05-5.0 weight % Nb. This method makes it possible to produce Nd-Fe-B or Nd-Dy-Fe-B-Nb permanent magnet alloys with as small a calcium content as 0.1 weight % or less directly from starting materials. Accordingly, it is economically advantageous over the conventional reduction method which produces mother alloys.

Abstract translation: 一种制备钕 - 铁 - 硼永久磁铁合金的方法，该合金具有25.0-50.0重量％钕，0.3-5.0重量％硼和余量基本上为铁的组成，包括以下步骤：加入金属钙，氢化钙或混合物 作为氟化钕，铁和硼（或铁硼）的还原剂，并进一步向其中加入氯化钙，氯化钠和氯化钾中的至少一种作为助熔剂，将所得混合物在惰性气体气氛中或在 减少气氛或基本上在1000°-1.300℃的真空中，从而减少所述氟化钕，以提供具有小于0.1重量％或更少的钙含量的所述合金。 起始材料可以含有氟化镝和铌，以提供含有0.5-15.0重量％Dy和0.05-5.0重量％Nb的Nd-Dy-Fe-B-Nb合金。 该方法可以直接从起始材料制造具有小于0.1重量％或更少的钙含量的Nd-Fe-B或Nd-Dy-Fe-B-Nb永磁体合金。 因此，与生产母合金的常规还原方法相比，在经济上是有利的。

公开(公告)号：US5489343A

公开(公告)日：1996-02-06

申请号：US187007

申请日：1994-01-27

Applicant: Kimio Uchida ,  Masahiro Takahashi ,  Masamichi Ozaki ,  Akira Kikuchi

Inventor： Kimio Uchida ,  Masahiro Takahashi ,  Masamichi Ozaki ,  Akira Kikuchi

IPC: B22F1/00 ,  H01F1/057

CPC classification number: B22F1/0059 ,  H01F1/0577

Abstract: An R-Fe-B-based, sintered magnet, wherein R is one or more of rare earth elements including Y, is produced by the method including the steps of mixing fine R-Fe-B-based magnet powder with a mineral oil and/or a synthetic oil having a fractional distillation temperature range of 150.degree.-400.degree. C. and a kinetic viscosity of 10 cSt or less to prepare a mixture; charging the mixture under pressure into a die cavity equipped with a filter, to which an orientated magnetic field is applied, while removing a mineral oil and/or a synthetic oil from the mixture; compressing the mixture in the die cavity to carry out a wet molding while orientating the powder to prepare a green body; heating the green body to a temperature up to 500.degree. C. at a speed of 10.degree. C./min or less under pressure of 10.sup.-1 Torr or less for 30 minutes or more to remove a mineral oil and/or a synthetic oil from the green body; and then sintering the green body.

Abstract translation: 通过包括以下步骤的方法制备其中R为包括Y的稀土元素中的一种或多种的R-Fe-B系烧结磁体，所述方法包括将细R-Fe-B系磁粉与矿物油混合， /或分馏温度范围为150〜-400℃，动粘度为10cSt以下的合成油，制备混合物; 在压力下将混合物装入装有过滤器的模腔中，同时从混合物中除去矿物油和/或合成油，施加定向磁场; 压缩模腔中的混合物以在使粉末定向以制备生坯体的同时进行湿成​​型; 在10-1乇或更低的压力下以10℃/分钟或更低的速度将生坯体加热至高达500℃的温度，持续30分钟以上，以除去矿物油和/或合成油 从绿色的身体; 然后烧结生坯。

公开(公告)号：US5292380A

公开(公告)日：1994-03-08

申请号：US242947

申请日：1988-09-09

Applicant: Shigeho Tanigawa ,  Kimio Uchida

Inventor： Shigeho Tanigawa ,  Kimio Uchida

IPC: C22C38/00 ,  H01F1/053 ,  H01F1/057 ,  H05H7/04

CPC classification number: H01F1/057

Abstract: A permanent magnet having superior resistance to radioactive deterioration of magnetic properties. The magnet has a composition represented by the formula R.sub.a Fe.sub.bal. Co.sub.b B.sub.c Ga.sub. M.sub.e, in which the R denotes at least one element selected from the group consisting of Nd, Pr, Dy, Tb, Ho, and Ce, and the M denotes at least one element selected from the group consisting of Al, Si, Nb, Ta, Ti, Zr, Hf, and W, with the proviso that 12.ltoreq.a.ltoreq.18, 0.ltoreq.b.ltoreq.30, 4.ltoreq.c.ltoreq.10, 0.01.ltoreq.d.ltoreq.3 and 0.ltoreq.e.ltoreq.2 in terms of atomic percent. The permanent magnet has fine crystal grains provided with magnetic anisotropy.

Abstract translation: 具有优异的磁性能的放射性劣化的永磁体。 磁体具有由式RaFebal.CobBcGaMe表示的组成，其中R表示选自Nd，Pr，Dy，Tb，Ho和Ce中的至少一种元素，M表示选自至少一种元素 从由Al，Si，Nb，Ta，Ti，Zr，Hf和W组成的组中，条件是12 <= a <= 18,0 <= b <= 30,4 <= c < 0.01 <= d <= 3，0 <= e <= 2。 永磁体具有提供磁各向异性的细晶粒。

公开(公告)号：US4604042A

公开(公告)日：1986-08-05

申请号：US618183

申请日：1984-06-07

Applicant: Shigeho Tanigawa ,  Shuichi Shiina ,  Kimio Uchida

Inventor： Shigeho Tanigawa ,  Shuichi Shiina ,  Kimio Uchida

IPC: B29C45/00 ,  H01F7/02 ,  H01F13/00 ,  H01F41/02 ,  B28B17/00

CPC classification number: H01F13/003 ,  B29C45/0013 ,  H01F41/028 ,  H01F7/0268 ,  Y10S425/033

Abstract: A mold for producing an anisotropic magnet from a composition essentially consisting of magnetic powder and a binder, a mold body, a cavity for molding the composition in the presence of an anisotropically oriented magnetic field produced by a plurality of first magnets for providing magnetic fluxes for the magnetic field in the cavity, yokes, each provided between the cavity and the first magnets, and second magnets provided on both circumferential sides of the yokes for preventing the leakage of the magnetic fluxes. The first and second magnets are made of permanent magnets such as rare earth cobalt magnets. The mold may be provided at both ends with third magnets for preventing the axial leakage of the magnetic flux from the axial ends of the yokes. Two or more molds may be combined in a single molding apparatus while sharing the first magnets. This mold is suitable for the injection, extrusion or insert molding of bonded magnet rolls, motor rotors, etc.

Abstract translation: 一种用于由主要由磁性粉末和粘合剂组成的组合物制成各向异性磁体的模具，模具体，用于在由用于提供磁通量的多个第一磁体产生的各向异性取向磁场的情况下模制该组合物的腔 空腔中的磁场，各自设置在空腔和第一磁体之间的磁轭，以及设置在磁轭的两个周向侧上的第二磁体，用于防止磁通量的泄漏。 第一和第二磁体由诸如稀土钴磁体的永磁体制成。 模具可以在两端设置有用于防止磁通量从轭的轴向端部轴向泄漏的第三磁体。 两个或更多个模具可以在共享第一磁体的同时在单个成型设备中组合。 该模具适用于粘结磁铁辊，电机转子等的注塑，挤出或嵌入成型