一种新型镗刀杆锋刀杆是普通控床上加工箱体类零件的必备辅具，迄今工厂使用的模刀杆普遍采用以结构钢（如４５”钢）为主体并镶以工具钢（如刀ＺＡ钢，淬火硬度ＨＲＣ６０～６４）镶条的结构，如图１所示。该结构存在以下缺点：（）制造工艺性较差；（２）镶条无互换性，... A new type boring bar The front bar is a necessary accessory for the general control of the machining of the box-type parts on the bed. To date, the mold bar used in the factory has been widely used as structural steel (such as 45 "steel) and inlaid with tool steel Such as the knife ZA steel, quenching hardness HRC60 ~ 64) inlaid structure, shown in Figure 1. The structure has the following disadvantages: (...) manufacturing process is poor;