在磨削外圆柱表面时,由于砂轮、工件和工作台运动不平稳,机床各部分相对位置的精度和几何精度存在严重缺陷等原因,都会对被磨削表面产生不同程度的损伤。轻者出现眼睛可以看到但手感觉不出的直形纹、螺旋纹等波纹。严重的会出现手能感觉到的损伤痕迹,即扎刀现象。这些表面损伤不 Grinding the surface of the outer cylinder, due to the grinding wheel, workpiece and table movement is not stable, the relative position of the machine parts of the accuracy and geometry of the existence of serious defects and other reasons, will have different degrees of damage to the surface being grinded. The light appears in the eyes but can not feel the straight lines, spirals and other ripples. Serious will appear hand can feel the traces of injury, that is, the phenomenon of knife. These surface damage is not