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轴类零件中心孔的传统形式是锥角为60°的圆锥形孔,它们具有平直摩擦面。图1所示的 R 形支承中心孔在10年来已得到推广应用,摩擦面呈圆拱形的定位孔具有优良的性能;其一是定位孔对顶尖具有护锥作用;其二是改善了安装、夹持时一旦存在位置偏差或工件有变形时,在支承处的受力状态。由
The traditional form of center hole for shaft parts is a conical hole with a cone angle of 60 °, which has a straight friction surface. The center hole of the R-shaped support shown in FIG. 1 has been popularized and applied for 10 years. The positioning hole with a circular arc-shaped friction surface has excellent performance. One is that the positioning hole has a cone guard function to the top and the other is to improve the installation , When there is a clamping position deviation or deformation of the workpiece, the bearing at the force state. by