陶瓷轴承外圈内圆磨削力与表面质量研究

Grinding Force and Surface Quality of Inner Circle of Ceramic Bearing Outer Ring

为了探究陶瓷轴承外圈内圆(简称外圆)磨削力以及磨削力对表面质量的影响机制,通过磨削实验首先获得了不同磨削参数对外圆磨削力的影响规律,其次得出了旋转磨削力与表面粗糙度和表面去除方式的关系。结果表明,随着砂轮速度减小,进给量和工件转速增加,陶瓷外圆磨削法向与切向磨削力均增加,且法向磨削力是切向磨削力的3倍左右;当磨削力增大,磨削表面由塑性去除向脆性去除转变,表面粗糙度值增大,表面质量变差。在陶瓷轴承外圆磨削时可适当选用较高的砂轮速度、较小的进给量和工件转速以保证表面加工质量和加工效率。

In order to explore the grinding force of the inner circle of the ceramic bearing outer ring(abbreviated as outer circle)and the influence mechanism of the grinding force on the surface quality,firstly,the influence rules of different grinding parameters on the grinding force of the outer circle were obtained through grinding experiments.Secondly,the relationship among the rotary grinding force,the surface roughness and surface removal method was obtained.The results show that as the wheel speed decreases,the feed rate and the workpiece speed increase,both the normal and tangential direction grinding forces of ceramic cylindrical grinding increase.The normal direction grinding force is about 3 times of the tangential direction grinding force.When the grinding force increases,the grinding surface changes from plastic removal to brittleness removal,the surface roughness value increases,and the surface quality deteriorates.In the cylindrical grinding of ceramic bearings,higher grinding wheel speed,smaller feed rate and workpiece speed are appropriately selected to ensure the surface processing quality and processing efficiency.