对零件上的某些孔,在尺寸精度和几何精度(椭圆度和圆柱度)以及孔的表面光洁度等方面提出了很高的要求。为了达到这些精度,可以采用精镗、铰孔、磨削、珩磨、研磨、精整、滚压或其它加工方法。本文叙述了用新研制的精镗头进行精镗的情况。 Certain holes in the part place high demands on dimensional accuracy and geometric accuracy (ovality and cylindricity) as well as surface finish of the hole. To achieve these precision, fine boring, reaming, grinding, honing, grinding, finishing, rolling or other processing methods can be used. This article describes the use of newly developed fine boring head for fine boring.