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    • 7. 发明授权
    • Expandable mandrel
    • 可扩展心轴
    • US06832756B2
    • 2004-12-21
    • US10345495
    • 2003-01-16
    • Michael J. PalmerS. Scott MacIntyre
    • Michael J. PalmerS. Scott MacIntyre
    • B21D4102
    • B23B31/4013
    • An expandable mandrel for holding a workpiece, including a mandrel body having an interior surface and an exterior surface. The interior surface defines at least first and second interior regions separated by a transition surface, the first region having a cross sectional area greater than a cross-sectional area of the second region. A plurality of slots extend between the interior surface and the exterior surface. A slave actuator having a bearing surface is at least partially disposed in the first region, and a master actuator is provided for urging the bearing surface against the transition surface to expand the mandrel against the workpiece.
    • 一种用于保持工件的可膨胀心轴,包括具有内表面和外表面的心轴本体。 内表面限定由过渡表面分开的至少第一和第二内部区域,第一区域具有大于第二区域的横截面面积的横截面面积。 多个狭槽在内表面和外表面之间延伸。 具有轴承表面的从动致动器至少部分地布置在第一区域中,并且提供主致动器用于将支承表面压靠过渡表面以使心轴相对于工件膨胀。