在万能镗床上加工直径大于200mm的内孔时，一般粗糙度能达到Ra0．8，为提高表面加工质量，仅靠刃磨镗刀几何角度和控制切削用量是达不到的。笔者设计了一套镗床浮动抛光辅具，可在万能镗床上用浮动抛光的手段来达到提高表面质量的效果。浮动抛光辅具如图所示，套简轴3采用45钢 In the universal boring machine processing diameter greater than 200mm bore, the general roughness can reach Ra0.8, in order to improve the quality of the surface processing, boring boring knife geometry angle alone and control the amount of cutting is not reached. I designed a set of boring machine floating polishing aids, floating in the universal boring machine with a tool to achieve the effect of improving the surface quality. Floating polishing aids as shown, set of simple shaft 3 45 steel