公开(公告)号：US06461565B2

公开(公告)日：2002-10-08

申请号：US09801096

申请日：2001-03-08

申请人： Koki Tokuhara ,  Shuhei Okumura ,  Akiyasu Oota

发明人： Koki Tokuhara ,  Shuhei Okumura ,  Akiyasu Oota

IPC分类号： B22F312

CPC分类号： C22C1/0441 ,  B22F3/02 ,  B22F2998/10 ,  B22F2999/00 ,  B30B15/304 ,  H01F1/0556 ,  H01F1/0576 ,  H01F41/026 ,  H01F41/0266 ,  B22F9/082 ,  B22F9/04 ,  B22F3/10 ,  B22F2201/03 ,  B22F3/1007

摘要： A green compact of a rare earth alloy magnetic powder is made by pressing the powder. The powder is pressed within an air environment that has a temperature controlled at 30° C. or less and a relative humidity controlled at 65% or less.

公开(公告)号：US06602352B2

公开(公告)日：2003-08-05

申请号：US09891497

申请日：2001-06-27

申请人： Shuhei Okumura ,  Akira Nakamura

发明人： Shuhei Okumura ,  Akira Nakamura

IPC分类号： H01F103

CPC分类号： C22C1/0441 ,  B22F2999/00 ,  B30B11/027 ,  B30B15/0082 ,  H01F1/0577 ,  H01F13/00 ,  H01F41/0266 ,  H01F41/0273 ,  B22F3/02 ,  B22F2202/05 ,  B22F1/0081 ,  B22F3/004

摘要： A method and apparatus for manufacturing a rare earth magnet is disclosed. In a first step, a compact is produced by compacting rare earth alloy powder in a predetermined space in an orienting magnetic field. Next, a demagnetizing process is performed for the compact, and the compact is ejected from the predetermined space. Then, a additional demagnetizing process is performed for magnetic powder adhering to a surface of the compact by applying an magnetic field to the compact after the compact is ejected.

公开(公告)号：US06481993B1

公开(公告)日：2002-11-19

申请号：US09669576

申请日：2000-09-26

申请人： Seiichi Kohara ,  Shuhei Okumura ,  Akira Nakamura

发明人： Seiichi Kohara ,  Shuhei Okumura ,  Akira Nakamura

IPC分类号： B65G4774

CPC分类号： B30B15/304 ,  B22F3/004 ,  B22F2999/00 ,  H01F1/0571 ,  H01F1/0577 ,  H01F1/06 ,  H01F41/0253 ,  H01F41/0266 ,  B22F2201/10

摘要： In a rare earth metal-based alloy powder supplying apparatus, a rare earth metal-based alloy powder is supplied from a feeder box having an opening in its bottom surface into a cavity by moving the feeder box to above the cavity. The apparatus includes a bar-shaped member which is moved horizontally and in parallel in the bottom of the feeder box. A plurality of the bar-shaped members may be provided horizontally at distances. The apparatus further includes a powder replenishing device for sequentially replenishing the alloy powder into the feeder box in an amount corresponding to a decrement in amount resulting from the supplying of the alloy powder from the feeder box to the cavity, an inert gas supply device for filling an inert gas into said powder feeder box, and a plate member made of a fluorine-contained resin and mounted on the bottom surface of the feeder box. Thus, an alloy powder extremely poor in fluidity and in agitatability and liable to be inflamed can be supplied into the cavity with an extremely uniform filled density without production of agglomerates and bridges and with no fear of inflammation.

公开(公告)号：US07045092B2

公开(公告)日：2006-05-16

申请号：US10489338

申请日：2003-04-04

申请人： Atsushi Ogawa ,  Shuhei Okumura

发明人： Atsushi Ogawa ,  Shuhei Okumura

IPC分类号： B22F3/14

CPC分类号： B30B11/022 ,  B22F3/02 ,  B22F3/03 ,  B22F2998/00 ,  B22F2998/10 ,  B22F2999/00 ,  H01F1/0536 ,  H01F1/0573 ,  H01F1/0577 ,  H01F1/086 ,  H01F41/0273 ,  C22C1/0441 ,  B22F2202/05 ,  B22F2202/01

摘要： A perpendicular pressing/compacting method for a rare-earth alloy powder is provided to produce a sintered magnet with excellent magnetic properties. A method for pressing a rare-earth alloy powder by using a die is provided. The die is made of a non-magnetic material and has a die hole to define a cavity and a pair of yoke members provided on both sides of the cavity. The method includes the steps of: providing the rare-earth alloy powder; filling the cavity of the die with the rare-earth alloy powder; and compressing the rare-earth alloy powder, loaded in the cavity, between a pair of opposed press surfaces. A pulse magnetic field substantially perpendicular to a compressing direction is not applied until the apparent density of the rare-earth alloy powder in the cavity reaches a predetermined value, at least equal to 47% of the true density thereof, while the compressing step is being carried out.

摘要翻译： 提供了一种用于稀土合金粉末的垂直压制/压制方法，以制备具有优异磁性能的烧结磁体。 提供了通过使用模具压制稀土类合金粉末的方法。 模具由非磁性材料制成，并且具有模具孔以限定空腔和设置在空腔两侧的一对轭构件。 该方法包括以下步骤：提供稀土合金粉末; 用稀土合金粉末填充模具的腔体; 并且将装载在空腔中的稀土合金粉末压缩在一对相对的压制表面之间。 基本上垂直于压缩方向的脉冲磁场不施加，直到空腔中的稀土合金粉末的表观密度达到至少等于其真实密度的47％的预定值，而压缩步骤是 执行。

公开(公告)号：US07025930B2

公开(公告)日：2006-04-11

申请号：US10357355

申请日：2003-02-04

申请人： Shuhei Okumura ,  Hiroshi Hashikawa

发明人： Shuhei Okumura ,  Hiroshi Hashikawa

IPC分类号： B22F3/12

CPC分类号： H01F1/0577 ,  H01F41/0253

摘要： In a process for handling green compacts made from a rare earth metal-based magnetic alloy powder by a press machine to slide, on a sintering support plate, the green compacts, the support plate used has a surface roughness degree Ra in a range of 0.6 to 47 μm. At a first step, the green compacts are disposed in a first position near a final transport position, and at a second step, the said green compacts disposed in the first position are slid on the sintering support plate and disposed in the final transport position. Thus, by using the support plate having a surface roughness degree in a particular range, the green compacts made from the rare earth metal-based magnetic alloy powder can be sintered without occurrence of the deposition of the green compacts to the support plate, the chipping of the green compacts and the like. In addition, the efficiency of operation of the press machine can be increased.

公开(公告)号：US06779995B2

公开(公告)日：2004-08-24

申请号：US10212091

申请日：2002-08-06

申请人： Seiichi Kohara ,  Shuhei Okumura ,  Akira Nakamura

发明人： Seiichi Kohara ,  Shuhei Okumura ,  Akira Nakamura

IPC分类号： B22F302

CPC分类号： B30B15/304 ,  B22F3/004 ,  B22F2999/00 ,  H01F1/0571 ,  H01F1/0577 ,  H01F1/06 ,  H01F41/0253 ,  H01F41/0266 ,  B22F2201/10

摘要： In a rare earth metal-based alloy powder supplying apparatus, a rare earth metal-based alloy powder is supplied from a feeder box having an opening in its bottom surface into a cavity by moving the feeder box to above the cavity. The apparatus includes a bar-shaped member which is moved horizontally and in parallel in the bottom of the feeder box. A plurality of the bar-shaped members may be provided horizontally at distances. The apparatus further includes a powder replenishing device for sequentially replenishing the alloy powder into the feeder box in an amount corresponding to a decrement in amount resulting from the supplying of the alloy powder from the feeder box to the cavity, an inert gas supply device for filling an inert gas into said powder feeder box, and a plate member made of a fluorine-contained resin and mounted on the bottom surface of the feeder box. Thus, an alloy powder extremely poor in fluidity and in agitatability and liable to be inflamed can be supplied into the cavity with an extremely uniform filled density without production of agglomerates and bridges and with no fear of inflammation.

摘要翻译： 在稀土类金属基合金粉末供给装置中，通过将供料盒移动到空腔的上方，从其底面开口的供料箱向空腔供给稀土类金属系合金粉末。 该装置包括在进料盒的底部水平移动并平行移动的棒状构件。 多个条形构件可以在距离处水平设置。 该装置还包括粉末补给装置，用于将合金粉末顺序地补充到进料箱中，其量相当于从供料盒向腔体供应合金粉末所产生的量减少;惰性气体供应装置，用于填充 将惰性气体输送到所述粉末给料盒中，以及由含氟树脂制成的板件，并安装在所述进料盒的底表面上。 因此，可以以非常均匀的填充密度将流动性和搅拌性极差且容易发炎的合金粉末供给到空腔中，而不产生附聚物和桥梁，并且不用担心发炎。

公开(公告)号：US07014440B2

公开(公告)日：2006-03-21

申请号：US10459425

申请日：2003-06-12

申请人： Shuhei Okumura ,  Akira Nakamura

发明人： Shuhei Okumura ,  Akira Nakamura

IPC分类号： B29C43/02

CPC分类号： C22C1/0441 ,  B22F2999/00 ,  B30B11/027 ,  B30B15/0082 ,  H01F1/0577 ,  H01F13/00 ,  H01F41/0266 ,  H01F41/0273 ,  B22F3/02 ,  B22F2202/05 ,  B22F1/0081 ,  B22F3/004

摘要： A method and apparatus for manufacturing a rare earth magnet is disclosed. In a first step, a compact is produced by compacting rare earth alloy powder in a predetermined space in an orienting magnetic field. Next, a demagnetizing process is performed for the compact, and the compact is ejected from the predetermined space. Then, a additional demagnetizing process is performed for magnetic powder adhering to a surface of the compact by applying an magnetic field to the compact after the compact is ejected.

摘要翻译： 公开了一种用于制造稀土磁体的方法和装置。 在第一步骤中，通过在定向磁场中在预定空间中压实稀土合金粉末来制造压块。 接下来，对该压实体进行退磁处理，并且从预定空间喷出压块。 然后，通过在压实体被喷射之后向压块施加磁场，对附着于压块的表面的磁粉进行额外的退磁处理。

公开(公告)号：US06491765B2

公开(公告)日：2002-12-10

申请号：US09851423

申请日：2001-05-09

申请人： Katsumi Okayama ,  Naoyuki Ishigaki ,  Shuhei Okumura

发明人： Katsumi Okayama ,  Naoyuki Ishigaki ,  Shuhei Okumura

IPC分类号： H01F1057

CPC分类号： B82Y25/00 ,  H01F1/0573 ,  H01F1/0577 ,  H01F1/0579

摘要： The method for manufacturing alloy powder for R—Fe—B type rare earth magnets of the present invention includes a first pulverization step of coarsely pulverizing a material alloy for rare earth magnets and a second pulverization step of finely pulverizing the material alloy. In the first pulverization step, the material alloy is pulverized by a hydrogen pulverization method. In the second pulverization step, easily oxidized super-fine powder (particle size: 1.0 &mgr;m or less) is removed to adjust the particle quantity of the super-fine powder to 10% or less of the particle quantity of the entire powder.

公开(公告)号：US06299832B1

公开(公告)日：2001-10-09

申请号：US09472247

申请日：1999-12-27

申请人： Seiichi Kohara ,  Shuhei Okumura ,  Akira Nakamura

发明人： Seiichi Kohara ,  Shuhei Okumura ,  Akira Nakamura

IPC分类号： B22F312

CPC分类号： B30B15/304 ,  B22F3/004 ,  B22F2999/00 ,  H01F1/0571 ,  H01F1/0577 ,  H01F1/06 ,  H01F41/0253 ,  H01F41/0266 ,  B22F2201/10

摘要： In a rare earth metal-based alloy powder supplying apparatus, a rare earth metal-based alloy powder is supplied from a feeder box having an opening in its bottom surface into a cavity by moving the feeder box to above the cavity. The apparatus includes a bar-shaped member which is moved horizontally and in parallel in the bottom of the feeder box. A plurality of the bar-shaped members may be provided horizontally at distances. The apparatus further includes a powder replenishing device for sequentially replenishing the alloy powder into the feeder box in an amount corresponding to a decrement in amount resulting from the supplying of the alloy powder from the feeder box to the cavity, an inert gas supply device for filling an inert gas into said powder feeder box, and a plate member made of a fluorine-contained resin and mounted on the bottom surface of the feeder box. Thus, an alloy powder extremely poor in fluidity and in agitatability and liable to be inflamed can be supplied into the cavity with an extremely uniform filled density without production of agglomerates and bridges and with no fear of inflammation.

摘要翻译： 在稀土类金属基合金粉末供给装置中，通过将供料盒移动到空腔的上方，从其底面开口的供料箱向空腔供给稀土类金属系合金粉末。 该装置包括在进料盒的底部水平移动并平行移动的棒状构件。 多个条形构件可以在距离处水平设置。 该装置还包括粉末补给装置，用于将合金粉末顺序地补充到进料箱中，其量相当于从供料盒向腔体供应合金粉末所产生的量减少;惰性气体供应装置，用于填充 将惰性气体输送到所述粉末给料盒中，以及由含氟树脂制成的板件，并安装在所述进料盒的底表面上。 因此，可以以非常均匀的填充密度将流动性和搅拌性极差且容易发炎的合金粉末供给到空腔中，而不产生附聚物和桥梁，并且不用担心发炎。

公开(公告)号：US06537488B1

公开(公告)日：2003-03-25

申请号：US09440100

申请日：1999-11-15

申请人： Shuhei Okumura ,  Hiroshi Hashikawa

发明人： Shuhei Okumura ,  Hiroshi Hashikawa

IPC分类号： B22F312

CPC分类号： H01F1/0577 ,  H01F41/0253

摘要： In a process for handling green compacts made from a rare earth metal-based magnetic alloy powder by a press machine to slide, on a sintering support plate, the green compacts, the support plate used has a surface roughness degree Ra in a range of 0.6 to 47 &mgr;m. At a first step, the green compacts are disposed in a first position near a final transport position, and at a second step, the said green compacts disposed in the first position are slid on the sintering support plate and disposed in the final transport position. Thus, by using the support plate having a surface roughness degree in a particular range, the green compacts made from the rare earth metal-based magnetic alloy powder can be sintered without occurrence of the deposition of the green compacts to the support plate, the chipping of the green compacts and the like. In addition, the efficiency of operation of the press machine can be increased.

摘要翻译： 在通过压机机械处理由稀土类金属系磁性合金粉末制成的压坯的工序中，在烧结支撑板上生坯，使用的支撑板的表面粗糙度Ra为0.6 到47岁 在第一步骤中，绿色压块被布置在靠近最终传送位置的第一位置，并且在第二步骤中，设置在第一位置的所述生坯压块在烧结支撑板上滑动并设置在最终传送位置。 因此，通过使用具有特定范围的表面粗糙度的支撑板，可以烧结由稀土金属基磁性合金粉末制成的压坯，而不会发生生坯到支撑板的沉积， 的压坯等。 另外，能够提高冲压机的运转效率。