中文摘要：

结合超高速磨削技术和点磨削工艺,给出对点磨削及其相关技术的理解。建立砂轮磨损和承载等模型,研究发现,与传统外圆磨削相比,点磨削砂轮承载更均匀,寿命更长,磨削性能更佳。由点磨削参数条件下的单颗磨粒成屑试验发现,磨粒的实际切深要比理论切深小,并由单颗磨粒成屑机理给出合理解释。由砂轮连续成屑机理和砂轮相对工件运动轨迹的分析发现,工件轴向进给速度应低于保证良好磨削表面的最小旋切圈数的临界值。点磨削是一种优质的旋切工艺,能够实现较大切深的磨削加工,兼具高材料去除率和高表面质量的优点。由于主轴偏摆,砂轮和工件接触无闭合磨削区,经湿磨试验发现,点磨削接触区内有更大流量的磨削液通过。

英文摘要：

By combining super high-speed grinding and point grinding technologies,a comprehension of super high-speed point grinding and its correlative technologies is given. Models of grinding wheel wear and loading are built. It is found that the point grinding wheel has more even loading,longer life and better grinding performance in comparison to the traditional cylindrical grinding. In the chip formation test of single abrasive grain under the condition of point grinding parameters,it is found that the actual cutting depth of abrasive grain is less than the theoretical one,and the reasonable explanation is given by the chip formation mechanism of single abrasive grain. From the analysis of successive chip formation mechanism of wheel and the motion trajectory of wheel relative to the workpiece,it is found that the workpiece axial feed speed should be lower than the critical value of the least rotary-cutting cycles for ensuring fine grinding surface. Point grinding is a superior rotary-cutting process which can realize large cutting depth,high material removal rate and good surface quality. As wheel spindle swivels,the grinding zone between wheel and workpiece is not closed,it is found in wet grinding experiment that there is larger grinding fluid passing though the grinding contact zone.