Apparatus for shear-cutting a stack of amorphous steel sheets
    5.
    发明授权
    Apparatus for shear-cutting a stack of amorphous steel sheets 失效
    用于剪切一叠非晶钢板的装置

    公开(公告)号:US4942798A

    公开(公告)日:1990-07-24

    申请号:US334248

    申请日:1989-04-06

    IPC分类号: B23D15/08 B23D15/06 B23D35/00

    摘要: For shear-cutting a stack of thin sheets of amorphous steel along a cutting plane that extends transversely of the stack, we utilize apparatus that comprises two blades that are positioned at the start of a cutting operation on opposite sides of the stack. Each of the blades has a first surface for engaging one side of the stack and a second surface extending transversely of the first surface and generally parallel to said cutting plane and intersecting the first surface at a corner. The first surface of each blade is disposed at a predetermined rake angle with respect to a reference plane extending through a point on the corner of the blade and normal to said cutting plane. By making the sum of these rake angles of a negative value and beween 5 and 35 degrees, we are able to substantially improve the wear resistance of the blades and lengthen their working life.

    Modifying the surface of diamond particles
    7.
    发明授权
    Modifying the surface of diamond particles 失效
    修饰金刚石颗粒表面

    公开(公告)号:US4063907A

    公开(公告)日:1977-12-20

    申请号:US599941

    申请日:1975-07-28

    CPC分类号: C23C24/045 C09K3/1436

    摘要: Abrasive particles are prepared by milling diamond particles, metal compound and milling balls to smear a coating of the compound on the diamond particles and firing the compound-coated diamond particles producing a rough granular adherent covering of metal and/or metal carbide surface coating chemically bonded to the diamond surface by metal carbide.

    摘要翻译: 研磨颗粒通过研磨金刚石颗粒,金属化合物和研磨球以在金刚石颗粒上涂抹化合物的涂层并焙烧化合物涂覆的金刚石颗粒来制备,以产生化学键合的金属和/或金属碳化物表面涂层的粗糙颗粒粘附覆盖物 通过金属碳化物到金刚石表面。