基于表面粗糙度均匀性的曲面磨削研究

Study on Precision Grinding for Revolving Curved Surface Based on Uniform Surface Roughness

针对曲面磨削中不同曲率处的表面粗糙度不均匀的问题,基于等残留高度法,分析了砂轮圆弧半径、砂轮进给速度、工件转速以及工件曲率对残留高度的影响。结果显示,为得到较小的残留高度,应尽量保持低的砂轮进给速度,并且提高工件转速。曲率半径越小,粗糙度差异越大,改变砂轮进给速度可改善这一问题。砂轮的进给速度与曲率半径大小成正比。采用金刚石滚轮法以及砂轮变速进给可有效改善曲面磨削的表面粗糙度均匀性。

In order to improve the uneven surface roughness due to the different curvatures, the relationship among envelope height, feed rate, rotational speed and curvature of workpiece was analyzed based on equal-envelope-height grinding method. The results show that, low feed rate of grinding wheel and high rotational speed of workpieee are helpful to obtain smaller envelope height. And the smaller the radius of workpiece curvature, the more different the surface roughness. Besides, it is an effective method to solve this problem by changing the feed rate. The feed rate should be changed directly proportionally to radius of workpiece curvature. So, when grinding the revolving curved surface, diamond roller and various speeds at different radius of curvature are greatly helpful to the uniform surface roughness and surface quality.