圆锥滚子无心贯穿式超精研中滚子滑动分析

Analysis on Sliding of Rollers During Centerless Through-Feed Superfinishing of Tapered Rollers

圆锥滚子的无心贯穿式超精研过程中存在滚子与导辊之间的滑动现象,会影响加工质量,造成导辊磨损。分析导辊与滚子之间的周向滑动,建立了两者之间几何滑动模型并进行因素影响分析,得到纯滚动点最优位置方程。结果表明:纯滚动点在最优位置时几何滑动最小;导辊转速和半径越大,几何滑动越大,在不影响加工效率的情况下,应选择较小的导辊转速进行导辊设计和滚子加工;滚子锥角越大几何滑动越大,应加强对大锥角圆锥滚子超精滑动的控制。

There is sliding phenomenon between rollers and guide rollers during centerless through-feed superfinishing of tapered rollers,which affects machining quality and causes wear of guide rollers. The radial sliding are analyzed between guide rollers and rollers. The geometric sliding model is established and the influence factors are analyzed,and the optimal position equation of pure rolling point is obtained. The results show that the geometric slip is the smallest when pure rolling point is at optimal position. The geometric sliding is increased with increase of rotational speed and radius of guide rollers. Without affecting processing efficiency,the smaller rotational speed of guide rollers should be selected to design guide rollers and processing of rollers. The geometric slip is increased with increase of taper angle of rollers,the control of sliding should be strengthened during superfinishing of tapered rollers with large cone angle.