铰刀铰削加工一定数量的工件后 ,会因磨损过大导致被铰孔的尺寸偏离加工要求 ,此时必须更换铰刀 ,磨损后的铰刀只能报废或另作它用。为减少铰刀损耗 ,降低加工成本 ,笔者设计了一种装配式铰刀 ,可用于4 0～ 5 0ｍｍ孔的精铰加工。该铰刀的结构如图 1所示。刀块由焊接在刀座上 Reamer reaming After machining a certain number of workpieces, the size of the reaming hole deviates from the machining requirements due to excessive wear. In this case, the reamer must be replaced, and the worn reamer can only be scrapped or otherwise used. In order to reduce the reamer loss and reduce the processing cost, the author designed an assembly type reamer, which can be used for the precision reaming processing of 40 ~ 50mm holes. The reamer structure shown in Figure 1. Knife block by the welding seat