锯切无缝钢管用的镶齿锯片，其刀片每隔一齿要有倒 45°角的一齿； 45°倒角要求有一定角度的后角。 45°倒角齿形见图 1所示。 　　为了加工 45°倒角，专门设计了一台专机和专用卡具，其结构是：磨头的碗形砂轮轴线与水平放置的锯片成 45°角，磨头安装在能直线往返运动的动 Sawing seamless steel pipe with indented saw blade, the blade every other tooth should have a 45 ° angle down a tooth; 45 ° chamfering requires a certain angle of the posterior horn. 45 ° chamfer tooth shown in Figure 1. In order to process 45 ° chamfer, specially designed a special plane and special fixture, its structure is: grinding wheel axis of the bowl and the horizontal placed blade at 45 ° angle, the grinding head installed in a straight line back and forth movement of the move