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1. 发明授权

US07018485B2 Apparatus for subjecting rare earth alloy to hydrogenation process and method for producing rare earth sintered magnet using the apparatus 有权
标题翻译：稀土类合金的氢化处理装置及使用该装置的稀土类烧结磁体的制造方法
公开(公告)号：US07018485B2
公开(公告)日：2006-03-28
申请号：US10381006
申请日：2002-06-25
申请人： Akihito Tsujimoto , Katsumi Okayama , Shinji Kidowaki , Tadayoshi Muneto
发明人： Akihito Tsujimoto , Katsumi Okayama , Shinji Kidowaki , Tadayoshi Muneto
IPC分类号： H01F1/057
CPC分类号： B22F9/023 , C21D1/74 , H01F1/0553 , H01F1/0557 , H01F1/0573 , H01F1/0577 , H01F1/086
摘要： An apparatus for subjecting a rare earth alloy block to a hydrogenation process includes a casing, gas inlet and outlet ports, a member arranged to produce a gaseous flow, and a windbreak plate. The casing defines an inner space for receiving a container. The container includes an upper opening and stores the rare earth alloy block therein. A hydrogen gas and an inert gas are introduced into the inner space through the gas inlet port, and are exhausted from the inner space through the gas outlet port. The gaseous flow is produced by a fan, for example, in the inner space. The windbreak plate is disposed upstream with respect to the gaseous flow that has been produced inside the inner space. Also, the windbreak plate reduces a flow rate of the gaseous flow that has been produced near the upper opening of the container.
摘要翻译：用于对稀土合金块进行氢化处理的装置包括壳体，气体入口和出口，布置成产生气流的构件和防风板。壳体限定用于容纳容器的内部空间。该容器包括上部开口并将稀土合金块存储在其中。通过气体入口将氢气和惰性气体引入内部空间，并通过气体出口从内部空间排出。气流由风扇产生，例如在内部空间中。防风板相对于在内部空间内产生的气流设置在上游。此外，防风板减少了在容器的上部开口附近产生的气流的流量。

2. 发明授权

US06332932B1 Punch, powder pressing apparatus and powder pressing method 有权
标题翻译：冲压，压粉装置和粉末压制方法
公开(公告)号：US06332932B1
公开(公告)日：2001-12-25
申请号：US09551392
申请日：2000-04-18
申请人： Seiichi Kohara , Shinji Kidowaki
发明人： Seiichi Kohara , Shinji Kidowaki
IPC分类号： H01F1053
CPC分类号： B30B15/34 , B22F3/03 , B22F2003/023 , B22F2998/00 , B30B11/02 , B30B15/065 , H01F41/0273 , H02K15/03 , H02K41/0358 , Y10T428/12014 , B22F2202/05
摘要： A powder pressing apparatus comprises a die having a through hole, an upper punch and a lower punch. At least one of the upper and lower punches has a punching surface having an edge portion provided with a projection. The projection has a tip chamfered by a width not greater than 0.5 mm. The punching surface has a slope having a surface roughness Ra not greater than 1.0 &mgr;m. A rare-earth alloy powder is fed into a cavity formed in the through hole of the die. The rare-earth alloy powder in the cavity is oriented by magnetic field, and pressed by using the upper and lower punches. The upper punch and the lower punch are brought closest to each other at a minimum distance not smaller than 1.7 mm during the pressing. An obtained compact is used for manufacture of a sintered body and a voice coil motor.
摘要翻译：粉末压制装置包括具有通孔的模具，上冲头和下冲头。上冲头和下冲头中的至少一个具有冲压表面，该冲压表面具有设有突出部的边缘部分。突起具有倒角宽度不大于0.5mm的尖端。冲压表面具有表面粗糙度Ra不大于1.0μm的斜面。将稀土合金粉末供给到形成在模具的通孔中的空腔中。空腔中的稀土合金粉末通过磁场取向，并使用上下冲头压制。上冲头和下冲头在压制过程中以不小于1.7mm的最小距离彼此最接近。所获得的压块用于烧结体和音圈电动机的制造。

3. 发明授权

US06755883B2 Punch, powder pressing apparatus and powder pressing method 有权
标题翻译：冲压，压粉装置和粉末压制方法
公开(公告)号：US06755883B2
公开(公告)日：2004-06-29
申请号：US10225135
申请日：2002-08-22
申请人： Seiichi Kohara , Shinji Kidowaki
发明人： Seiichi Kohara , Shinji Kidowaki
IPC分类号： B22F300
CPC分类号： B30B15/34 , B22F3/03 , B22F2003/023 , B22F2998/00 , B30B11/02 , B30B15/065 , H01F41/0273 , H02K15/03 , H02K41/0358 , Y10T428/12014 , B22F2202/05
摘要： A powder pressing apparatus comprises a die having a through hole, an upper punch and a lower punch. At least one of the upper and lower punches has a punching surface having an edge portion provided with a projection. The projection has a tip chamfered by a width not greater than 0.5 mm. The punching surface has a slope having a surface roughness Ra not greater than 1.0 &mgr;m. A rare-earth alloy powder is fed into a cavity formed in the through hole of the die. The rare-earth alloy powder in the cavity is oriented by magnetic field, and pressed by using the upper and lower punches. The upper punch and the lower punch are brought closest to each other at a minimum distance not smaller than 1.7 mm during the pressing. An obtained compact is used for manufacture of a sintered body and a voice coil motor.
摘要翻译：粉末压制装置包括具有通孔的模具，上冲头和下冲头。上冲头和下冲头中的至少一个具有冲压表面，该冲压表面具有设有突出部的边缘部分。突起具有倒角宽度不大于0.5mm的尖端。冲压表面具有表面粗糙度Ra不大于1.0μm的斜面。将稀土合金粉末供给到形成在模具的通孔中的空腔中。空腔中的稀土合金粉末通过磁场取向，并使用上下冲头压制。上冲头和下冲头在压制过程中以不小于1.7mm的最小距离彼此最接近。所获得的压块用于烧结体和音圈电动机的制造。

4. 发明授权

US06656417B2 Punch, powder pressing apparatus and powder pressing method 有权
公开(公告)号：US06656417B2
公开(公告)日：2003-12-02
申请号：US09883231
申请日：2001-06-19
申请人： Seiichi Kohara , Shinji Kidowaki
发明人： Seiichi Kohara , Shinji Kidowaki
IPC分类号： B22F302
CPC分类号： B30B15/34 , B22F3/03 , B22F2003/023 , B22F2998/00 , B30B11/02 , B30B15/065 , H01F41/0273 , H02K15/03 , H02K41/0358 , Y10T428/12014 , B22F2202/05
摘要： A powder pressing apparatus comprises a die having a through hole, an upper punch and a lower punch. At least one of the upper and lower punches has a punching surface having an edge portion provided with a projection. The projection has a tip chamfered by a width not greater than 0.5 mm. The punching surface has a slope having a surface roughness Ra not greater than 1.0 &mgr;m. A rare-earth alloy powder is fed into a cavity formed in the through hole of the die. The rare-earth alloy powder in the cavity is oriented by magnetic field, and pressed by using the upper and lower punches. The upper punch and the lower punch are brought closest to each other at a minimum distance not smaller than 1.7 mm during the pressing. An obtained compact is used for manufacture of a sintered body and a voice coil motor.

5. 发明授权

US06649124B2 Powder pressing apparatus and powder pressing method 有权
公开(公告)号：US06649124B2
公开(公告)日：2003-11-18
申请号：US09901602
申请日：2001-07-11
申请人： Seiichi Kohara , Shinji Kidowaki , Tsutomu Harada
发明人： Seiichi Kohara , Shinji Kidowaki , Tsutomu Harada
IPC分类号： B22F312
CPC分类号： B22F3/03 , B22F2003/023 , B22F2009/041 , B22F2998/00 , B22F2998/10 , B22F2999/00 , B30B11/04 , H01F1/0577 , H01F41/0273 , C22C1/0441 , B22F9/023 , B22F9/04 , B22F3/02 , B22F2202/05
摘要： A powder pressing apparatus comprises a die formed with a plurality of cavities. None of the cavities overlap with another in the direction of pushing the compacts. The magnetic field generator includes a pair of yokes sandwiching the die. The yokes and the die have their respective upper surfaces generally in a same plane. A die lubricant is applied to the die but not to a region on which the compacts are to be slid. A rare-earth alloy powder in a feeder box is supplied into each of the cavities. The powder in the cavities is oriented, pressed, and the formed compacts and the yokes are demagnetized. The compacts are pushed and slid off the die on an anti-wear layer, by a flexible pushing member provided in a front portion of the feeder box. The compacts are sintered into rare-earth magnets, which are suitable for a coreless motor.

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