The method of lapping precision ball with variable-radius groove is developed in recent years. An experimental study on lapping ceramic balls with variable-radius groove was carried out. Taguchi method was used to design the orthogonal experiment of rough lapping, and the material removal rate (MRR) and the roundness were selected as evaluation indicators. The signal to noise ratio (S/N) and the analysis of variance were used to analyze experimental results. The optimal parameters combination with load pressure of 2.5 N/Ball, abrasive concentration of 10 wt% and rotation speed of 15 rpm was obtained. During rough lapping, the maximum reduction rate of average roundness is 50%, the maximum reduction rate of roundness deviation is 81%, the MRR is 16.9 μm/h, and the reduction rate of variation of ball lot diameter (V_DWL) is 90%. After semi-lapping and polishing, the best surface roughness is up to 10 nm, the best roundness is 0.128 μm, and the V_DWL is 0.24 μm. The surface roughness and V_DWL of the five balls tested all meet the requirements of ceramic ball with G5 grade, and the roundness value is close to the requirement of G5. The variable-radius groove lapping method is very suitable for improving the precision of batch lapping for ceramic balls.

近年来发展了变半径槽精磨球的方法。进行了可变半径槽研磨陶瓷球的实验研究。采用田口法设计粗研正交试验，选取材料去除率（MRR）和圆度作为评价指标。使用信噪比(S/N)和方差分析来分析实验结果。得到负载压力为2.5 N/Ball、磨料浓度为10 wt%、转速为15 rpm的最佳参数组合。粗磨时平均圆度最大减少率为50%，圆度偏差最大减少率为81%，MRR为 16.9 μm/h，球批直径（V _DWL）变化减少率为90%。半研磨抛光后，最佳表面粗糙度可达10 nm，最佳圆度为0.128 μm，V _DWL为0.24 μm。测试的五个球的表面粗糙度和V _DWL均满足G5级陶瓷球的要求，圆度值接近G5的要求。变半径槽研磨法非常适合提高陶瓷球的批量研磨精度。