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    Mandrel cleaning device for extrusion press
    1.
    发明授权
    Mandrel cleaning device for extrusion press 失效
    挤压机心轴清洗装置

    公开(公告)号：US4399676A

    公开(公告)日：1983-08-23

    申请号：US267243

    申请日：1981-05-26

    申请人： Tatsuhiko Noyori ,  Masakazu Ueda ,  Masanobu Aoki ,  Takashi Kajima ,  Tsuneharu Masuda

    发明人： Tatsuhiko Noyori ,  Masakazu Ueda ,  Masanobu Aoki ,  Takashi Kajima ,  Tsuneharu Masuda

    IPC分类号： B21C35/06 ,  B21C25/04

    CPC分类号： B21C35/06

    摘要： A mandrel cleaning device capable of automatically performing cleaning operation in an extrusion press of the type which has a pressurizing stem for pressing a billet in a container toward a die and a mandrel axially slidable in and relative to the pressurizing stem for determining the internal shape of a hollow extruding material, the mandrel cleaning device having a rotary mechanism for rotating the mandrel about its axis, a grinder mechanism adapted to grind a tip portion at the fore end of the mandrel, and a transfer mechanism for moving the grinder mechanism toward and away from the mandrel.

    摘要翻译： 一种能够在挤压机中自动执行清洗操作的芯棒清洁装置，该挤压机具有用于将容器中的坯料压向模具的加压杆和可相对于加压杆轴向滑动的心轴，以确定内部形状 一种中空挤压材料，心轴清洁装置具有用于使心轴围绕其轴线旋转的旋转机构，适于研磨心轴前端的尖端部分的研磨机构，以及用于使研磨机构朝向和远离移动的转移机构 从心轴。

    Electromagnet drive device
    4.
    发明授权
    Electromagnet drive device 失效
    电磁驱动装置

    公开(公告)号：US4688139A

    公开(公告)日：1987-08-18

    申请号：US808108

    申请日：1985-12-12

    申请人： Osamu Nagata ,  Takashi Kajima ,  Toshihara Ozaki

    发明人： Osamu Nagata ,  Takashi Kajima ,  Toshihara Ozaki

    IPC分类号： H01F7/18 ,  F02D41/20 ,  H03K17/0416 ,  H03K17/64 ,  F02B3/00 ,  F02M7/00 ,  H01H47/32

    CPC分类号： H03K17/04166 ,  F02D41/20 ,  H03K17/64 ,  F02D2041/201 ,  F02D2041/2017 ,  F02D2041/2027 ,  F02D2041/2031 ,  F02D2041/2041

    摘要： A device for driving an electromagnet from a direct current source includes first and second circuits which are coupled in parallel to each other, and in parallel to a direct current source. The first circuit has a first switch, a solenoid coil, and a second switch all in series with one another. The second circuit has a third switch, a storage coil, and a fourth switch all in series with one another. A third circuit is provided which has a diode which is arranged to provide a current path from a junction between the storage coil and the fourth switch, to a junction between the first switch and the solenoid coil. In operation, during solenoid standby, the choke coil is caused to store electromagnetic energy. When the solenoid coil is energized, the switches are operated such that the energy stored in the storage coil is caused to quickly charge into the solenoid coil. The solenoid coil is maintained energized by operating the first switch in a chopper mode. To deenergize the solenoid coil, the switches are operated so that the energy in the solenoid coil is discharged into the storage coil. In this way, rapid deenergization is possible.

    摘要翻译： 用于从直流电源驱动电磁体的装置包括彼此并联并且与直流电源并联的第一和第二电路。 第一电路具有彼此串联的第一开关，螺线管线圈和第二开关。 第二电路具有第三开关，存储线圈和全部彼此串联的第四开关。 提供第三电路，其具有二极管，该二极管被布置成提供从存储线圈和第四开关之间的接点到第一开关和螺线管线圈之间的接合处的电流路径。 在操作中，在电磁阀待机期间，使扼流线圈存储电磁能。 当螺线管线圈通电时，开关被操作，使得储存在存储线圈中的能量迅速地进入电磁线圈。 螺线管线圈通过以斩波器模式操作第一开关来保持通电。 为了断电螺线管线圈，开关被操作，使得螺线管线圈中的能量被排放到存储线圈中。 这样，快速断电是可能的。

    Hollow cylindrical movable body for an electromagnet
    6.
    发明授权
    Hollow cylindrical movable body for an electromagnet 失效
    用于电磁铁的中空圆柱形可移动体

    公开(公告)号：US4746887A

    公开(公告)日：1988-05-24

    申请号：US771772

    申请日：1985-09-03

    申请人： Osamu Nogata ,  Takashi Kajima ,  Toshiharu Ozaki

    发明人： Osamu Nogata ,  Takashi Kajima ,  Toshiharu Ozaki

    IPC分类号： H01F7/16 ,  H01F7/08

    CPC分类号： H01F7/1638 ,  H01F7/1607 ,  H01F2007/1692

    摘要： An electromagnet includes a lightweight movable body in the form of a hollow cylindrical body. The resistances of circulation paths for eddy currents flowing in the movable body due to electromagnetic induction are increased to suppress the eddy currents. Excitation coils are connected parallel to each other to reduce the coil inductance for increasing the magnetic forces to attract the movable body and the response thereof.

    摘要翻译： 电磁体包括中空圆柱体形式的轻质可移动体。 由于电磁感应而在可移动体中流动的涡流的循环路径的电阻增加，以抑制涡流。 励磁线圈彼此平行地连接，以减小线圈电感，以增加磁力来吸引移动体及其响应。

    Electromagnet drive device
    7.
    发明授权
    Electromagnet drive device 失效
    电磁驱动装置

    公开(公告)号：US4688138A

    公开(公告)日：1987-08-18

    申请号：US808107

    申请日：1985-12-12

    申请人： Osamu Nagata ,  Takashi Kajima ,  Toshiharu Ozaki

    发明人： Osamu Nagata ,  Takashi Kajima ,  Toshiharu Ozaki

    IPC分类号： H01F7/18 ,  F02D41/20 ,  H03K17/041 ,  H03K17/64 ,  H01H47/32

    CPC分类号： F02D41/20 ,  H03K17/04113 ,  H03K17/64 ,  F02D2041/2017 ,  F02D2041/2027 ,  F02D2041/2044 ,  F02D2041/2058 ,  F02D2041/2079

    摘要： A method and apparatus for driving an electromagnetic device includes two coils which selectively attract and repel a moving body. In order to allow a quick switching of the moving body between being attracted by one coil and the other, the current through the coil which is not holding the moving body in its magnetic field can be made to be a level higher than the current to the coil which is holding the body in its magnetic field. By reducing the current to the coil that is holding the body, the body can be rapidly switched to be within the magnetic field of the other coil. In addition, the currents to the respective coils can be increased before this switching occurs. Structure can also be provided across the coils to quicken the time it takes for the magnetic field to dissipate.

    摘要翻译： 用于驱动电磁装置的方法和装置包括选择性地吸引和排斥移动体的两个线圈。 为了允许在一个线圈被另一个线圈吸引之间的移动体的快速切换，可以使通过在其磁场中不保持移动体的线圈的电流高于对于 线圈，其将身体保持在其磁场中。 通过减小到保持体的线圈的电流，能够迅速地将主体切换到另一线圈的磁场内。 此外，在这种切换发生之前，可以增加到各个线圈的电流。 也可以在线圈两端提供结构，以加快磁场耗散所需的时间。