Based on the geometric and kinematic relationship as well as the friction characteristics between the tapered roller's spherical fiducial surface and the guide roller's rib in through-feed superfinishing,the ideal rib's shape surface of the guide roller is analyzed.Its axial profile is simplified as a straight line and the straight profile is able to be used as a design profile,and a formula is derived for computing the incline angle of the straight profile.Based on the geometric 1nd kinematic relationships between the guide roller's rib and the grinding wheel in the rib grinding process with the special machine tool,the rib's shape surface after grinding is analyzed,and the equations of the shape surface and its axial profile are established.The results of numerical analysis in an example show that the rib's axial profile after grinding is serious nonlinear in the root region of about 0.5 mm height,and is approximately linear in other region.The profile after grinding is very close to the design profile if vertical angle of the grinding wheel head is properly selected and the wheel is crossed over the rib groove about 0.5 mm.%基于圆锥滚子贯穿式超精研中导辊挡边与滚子球基面之间的几何关系以及相对运动和摩擦特点,分析了导辊挡边的理想形面,将其轴向廓形简化为直线并作为设计廓形,给出了简化廓形直线倾斜角度计算公式;基于专用导辊磨床磨削挡边时挡边与砂轮之间的几何及运动关系,分析了挡边的磨削形面,给出了磨削形面方程及轴向廓形方程.结合算例进行磨削轴向廓形的数值分析表明,廓形根部约0.5mm高度范围内非线性严重,其余部分近似为直线;合理选择砂轮架垂直摆角,并使砂轮越过挡边越程槽约0.5mm,可以使磨削廓形与设计廓形十分接近.
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