我厂粗加工缸套内孔，使用 DU406组合机床，这种机床镗刀杆长约 700mm，在使用过程中，因镗刀磨损而常常要卸下刀体，换装新刀体，这样就使刀杆上的螺纹经常损坏，导致整个刀杆不能使用。 　　由于刀杆比较重，在频繁卸装工杆时，极易碰伤机床。为此，我们设计了一种组合式的镗 I plant roughing cylinder bore, the use of DU406 combination of machine tools, this machine boring bar length of about 700mm, in the course of use, due to boring knife wear and tear to remove the body often, dress up a new body, so that The thread on the tool bar is often damaged, rendering the entire tool bar unusable. As the arbor relatively heavy, in the frequent unloading rod, the machine easily bruised. To this end, we designed a modular boring