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    • 5. 发明授权
    • Switchable permanent magnetic chuck
    • 可切换永磁吸盘
    • US4468648A
    • 1984-08-28
    • US535914
    • 1983-09-22
    • Mamoru Uchikune
    • Mamoru Uchikune
    • B23Q3/15B23Q3/154H01F7/04
    • B23Q3/1546
    • A switchable permanent magnetic chuck of the type capable of detachably hold a magnetic work piece. The chuck comprises a frame structure with its top and bottom being open, a work supporting faceplate and a bottom plate to cover the top and bottom openings, respectively, of the frame structure, a plurality of stationary permanent magnets supported on the frame structure and a plurality of movable permanent magnets supported on a shiftable plate which is movably accomodated in the frame structure, and adapted to be operable in association with the stationary permanent magnets to bring the work supporting faceplate into a magnetized or demagnetized condition. In order to reduce the height of the chuck without reducing the magnetic power, permanent magnets having a high coercive force are used as the above-mentioned stationary and movable permanent magnets. The stationary and movable permanent magnets are, respectively, arranged so that their magnetization directions are alternately inversed along the direction of the arrangement of magnetic pole face portions of the work supporting faceplate in correspondence with the pitch of the magnetic pole face portions.
    • 一种能够可拆卸地保持磁性工件的类型的可切换永久磁性卡盘。 卡盘包括其顶部和底部打开的框架结构,工作支撑面板和底板,以分别覆盖框架结构的顶部和底部开口,多个固定的永久磁体支撑在框架结构上, 多个可移动永磁体,其支撑在可移动地容纳在框架结构中的可移动板上,并且适于与固定永磁体相关联地操作,以使工件支撑面板进入磁化或退磁状态。 为了在不降低磁功率的情况下降低卡盘的高度,使用具有高矫顽力的永磁体作为上述固定和可移动永磁体。 固定和可移动永磁体分别被布置成使得它们的磁化方向与工作支撑面板的磁极面部分的布置方向相对应于磁极面部分的间距交替地反转。