目的 在提高轴承滚子表面质量的基础上获得具有一定凸度的表面轮廓。方法 将自主搭建的电化学机械加工（electrochemical mechanical machining，ECMM）平台用于轴承滚子的表面加工，采用中性NaNO3水溶液作为电解液，设计了L9(34)的正交实验，使用表面粗糙度测量仪对实验前后轴承滚子的表面粗糙度Ra、轮廓最大高度Rz和轮廓凸度进行测量和分析，并利用实验数据分析影响表面粗糙度和凸度的各因素和水平。结果 经过ECMM加工后，轴承滚子表面粗糙度Ra值由加工前的0.0874 μm降低至0.0247 μm，轮廓最大高度Rz值由加工前的0.772 μm降低至0.238 μm，轮廓凸度由原来的平直表面增加到最大值43.3 μm。对于表面粗糙度，电流密度的影响最显著，各因素最佳水平为：电流密度5 A/cm2，机械作用压力0.20 MPa，运动速度0.24 m/s，磨具号数1000#。对轮廓凸度，电流密度的影响最显著，各因素最佳水平为：电流密度5 A/cm2，运动速度0.21 m/s，磨具号数2000#，机械作用压力0.20 MPa。结论 ECMM加工方法适用于轴承滚子的加工，可在一次加工中同时提高滚子的表面质量并获得一定凸度的表面轮廓。加工参数对表面质量和凸度影响最大的因素是加工电流密度，优先选择较大加工电流密度的同时要合理选择其他加工参数。

The work aims to improve the surface quality and obtain a certain surface convexity of bearing rollers. The self-built electrochemical mechanical machining (ECMM) platform was used for the surface processing of bearing rollers, the neutral NaNO3 aqueous solution was used as the electrolyte and the orthogonal experiment of L9(34) was designed for the experiment. Then the surface roughness, the maximum height of profile and the profile convexity of the bearing rollers before and after the experiment were measured and analyzed by Talysurf CLI2000 instrument. On the basis, the factors and levels affecting surface roughness and profile convexity were analyzed through the experimental data. After ECMM processing, the surface roughness Ra value of the bearing roller decreased from 0.087 μm to 0.0247 μm, the maximum height Rz value of profile decreased from 0.772 μm to 0.238 μm and the surface profile convexity increased from 0.63 μm to 43.3 μm. The effect of current density on the surface roughness was the most significant indicator. The best level of each factor was: the current density of 5 A/cm2, the mechanical pressure of 0.20 MPa, the speed of workpiece of 0.24 m/s and the abrasive number of 1000#. For profile convexity, the effect of current density was also the most significant indicator. The best level of each factor was: the current density of 5 A/cm2, the speed of workpiece of 0.21 m/s, the abrasive number of 2000# and the mechanical pressure of 0.20 MPa. ECMM is suitable for the bearing roller machining and it can improve the surface quality of bearing rollers and obtain a certain convexity degree in one process. The factor that significantly affects the surface quality and convexity among the machining parameters is the current desity. Other machining parameters should be reasonably chosen when the larger machining current density is selected preferentially.