滚动轴承是重要的机械基础件，圆锥滚子是其中一种重要的滚动体。凸度可改善滚子与滚道接触应力分布及弹流润滑油膜形状，从而提高轴承性能和寿命，其中对数形凸度是最佳凸度。贯穿式超精研是圆锥滚子凸度修形加工的主要工艺，但凸度的修形机理与规律十分复杂，迄今尚未充分揭示，严重制约滚子对数形凸度精密高效修形加工技术的发展。本项目以圆锥滚子凸度贯穿式超精研过程为研究对象，通过与一般超精研对比，研究油石与圆锥滚子之间研磨力以及油石磨损和滚子材料磨除的特征与变化规律；采用基于演变成形原理的凸度超精研修形分析方法，研究滚子凸度形状演变过程的数值模拟方法并进行数值模拟分析；开展凸度的修形加工试验研究；将理论分析、数值模拟和试验验证相结合，揭示凸度的修形机理与规律。预期成果可为圆锥滚子对数形凸度的精密高效修形加工提供理论和技术支撑，有利于促进高精度滚子以及高性能轴承制造技术的进步。

Rolling bearing is an kind of important and fundamental mechanical part, and tapered roller is is an kind of important rolling element in rolling bearing. Profile of the contact stress and the elastohydrodynamic lubrication film between the roller and raceway can be improved by the crown ,so the bearing performance and life can be improved also.The logarithmic crown is the best crown.Through-feed superfinishing is the main correcting process for tapered roller crown, but the correcting mechanism and regularity of the process are complex.The correcting mechanism and regularity of the process have not been fully revealed at the present, so the development of precise and efficient correcting technology for the logarithmic crown has been restricted seriously.In this project, the through-feed superfinishing process for tapered roller crown is taken as the research object ,and research contents are mainly as follows: by comparing with general superfinishing process, abrasive force between the oil stone and the tapered roller is studied ,and the characteristics and regularity on the oil stone wear and roller material wear are researched; the method to numericaly simulate the evolution of the roller crown shape is researched by using the analysis method based on the principle of evolution forming, and the numerical simulation are carried on; experimental and test study on the superfinishing process is also carried on; the theoretical analysis, numerical simulation,experiments and tests are integrated to reveal the correcting mechanism and regularity of the process. The expected research results in this project can be used as the theoretical and technical support of the precise and efficient process for the logarithmic crown of tapered roller, and as a result , manufacturing technology for the high precision roller and high performance rolling bearing can be promoted .